repo stringlengths 5 106 | file_url stringlengths 78 301 | file_path stringlengths 4 211 | content stringlengths 0 32.8k | language stringclasses 1
value | license stringclasses 7
values | commit_sha stringlengths 40 40 | retrieved_at stringdate 2026-01-04 14:56:49 2026-01-05 02:23:25 | truncated bool 2
classes |
|---|---|---|---|---|---|---|---|---|
jquery/jquery | https://github.com/jquery/jquery/blob/546a1eb03c345e1bafb72ae1aeb898abb5b3e51b/build/release/cdn.js | build/release/cdn.js | import { mkdir, readFile, writeFile } from "node:fs/promises";
import path from "node:path";
import { argv } from "node:process";
import util from "node:util";
import { exec as nodeExec } from "node:child_process";
import { rimraf } from "rimraf";
import archive from "./archive.js";
const exec = util.promisify( nodeExec );
const version = argv[ 2 ];
if ( !version ) {
throw new Error( "No version specified" );
}
const archivesFolder = "tmp/archives";
const versionedFolder = `${ archivesFolder }/versioned`;
const unversionedFolder = `${ archivesFolder }/unversioned`;
// The cdn repo is cloned during release
const cdnRepoFolder = "tmp/release/cdn";
// .min.js and .min.map files are expected
// in the same directory as the uncompressed files.
const sources = [
"dist/jquery.js",
"dist/jquery.slim.js",
"dist-module/jquery.module.js",
"dist-module/jquery.slim.module.js"
];
const rminmap = /\.min\.map$/;
const rjs = /\.js$/;
function clean() {
console.log( "Cleaning any existing archives..." );
return rimraf( archivesFolder );
}
// Map files need to reference the new uncompressed name;
// assume that all files reside in the same directory.
// "file":"jquery.min.js" ... "sources":["jquery.js"]
// This is only necessary for the versioned files.
async function convertMapToVersioned( file, folder ) {
const mapFile = file.replace( /\.js$/, ".min.map" );
const filename = path
.basename( mapFile )
.replace( "jquery", "jquery-" + version );
const contents = JSON.parse( await readFile( mapFile, "utf8" ) );
return writeFile(
path.join( folder, filename ),
JSON.stringify( {
...contents,
file: filename.replace( rminmap, ".min.js" ),
sources: [ filename.replace( rminmap, ".js" ) ]
} )
);
}
async function makeUnversionedCopies() {
await mkdir( unversionedFolder, { recursive: true } );
return Promise.all(
sources.map( async( file ) => {
const filename = path.basename( file );
const minFilename = filename.replace( rjs, ".min.js" );
const mapFilename = filename.replace( rjs, ".min.map" );
await exec( `cp -f ${ file } ${ unversionedFolder }/${ filename }` );
await exec(
`cp -f ${ file.replace(
rjs,
".min.js"
) } ${ unversionedFolder }/${ minFilename }`
);
await exec(
`cp -f ${ file.replace(
rjs,
".min.map"
) } ${ unversionedFolder }/${ mapFilename }`
);
} )
);
}
async function makeVersionedCopies() {
await mkdir( versionedFolder, { recursive: true } );
return Promise.all(
sources.map( async( file ) => {
const filename = path
.basename( file )
.replace( "jquery", "jquery-" + version );
const minFilename = filename.replace( rjs, ".min.js" );
await exec( `cp -f ${ file } ${ versionedFolder }/${ filename }` );
await exec(
`cp -f ${ file.replace(
rjs,
".min.js"
) } ${ versionedFolder }/${ minFilename }`
);
await convertMapToVersioned( file, versionedFolder );
} )
);
}
async function copyToRepo( folder ) {
return exec( `cp -f ${ folder }/* ${ cdnRepoFolder }/cdn/` );
}
async function cdn() {
await clean();
await Promise.all( [ makeUnversionedCopies(), makeVersionedCopies() ] );
await copyToRepo( versionedFolder );
await Promise.all( [
archive( { cdn: "googlecdn", folder: unversionedFolder, version } ),
archive( { cdn: "mscdn", folder: versionedFolder, version } )
] );
console.log( "Files ready for CDNs." );
}
cdn();
| javascript | MIT | 546a1eb03c345e1bafb72ae1aeb898abb5b3e51b | 2026-01-04T14:56:53.033090Z | false |
jquery/jquery | https://github.com/jquery/jquery/blob/546a1eb03c345e1bafb72ae1aeb898abb5b3e51b/build/release/verify.js | build/release/verify.js | /**
* Verify the latest release is reproducible
*/
import { exec as nodeExec } from "node:child_process";
import crypto from "node:crypto";
import { createWriteStream } from "node:fs";
import { mkdir, readdir, readFile } from "node:fs/promises";
import path from "node:path";
import { Readable } from "node:stream";
import { finished } from "node:stream/promises";
import util from "node:util";
import { gunzip as nodeGunzip } from "node:zlib";
import { rimraf } from "rimraf";
const exec = util.promisify( nodeExec );
const gunzip = util.promisify( nodeGunzip );
const DIST_REPO = "https://github.com/jquery/jquery-dist.git";
const SRC_REPO = "https://github.com/jquery/jquery.git";
const CDN_URL = "https://code.jquery.com";
const REGISTRY_URL = "https://registry.npmjs.org/jquery";
const excludeFromCDN = [
/^package\.json$/,
/^jquery\.factory\./
];
const rjquery = /^jquery/;
const rblogUrl = /https:\/\/blog\.jquery\.com\/[^)]+/;
async function verifyRelease() {
const version = process.env.VERSION || ( await getLatestVersion() );
const release = await buildRelease( { version } );
console.log( `Verifying jQuery ${ version }...` );
let verified = true;
const matchingFiles = [];
const mismatchingFiles = [];
// Check all files against the CDN
await Promise.all(
release.files
.filter( ( file ) => excludeFromCDN.every( ( re ) => !re.test( file.name ) ) )
.map( async( file ) => {
const url = new URL( file.cdnName, CDN_URL );
const response = await fetch( url );
if ( !response.ok ) {
throw new Error(
`Failed to download ${
file.cdnName
} from the CDN: ${ response.statusText }`
);
}
const cdnContents = await response.text();
if ( cdnContents !== file.cdnContents ) {
mismatchingFiles.push( url.href );
verified = false;
} else {
matchingFiles.push( url.href );
}
} )
);
// Check all files against npm.
// First, download npm tarball for version
const npmPackage = await fetch( REGISTRY_URL ).then( ( res ) => res.json() );
if ( !npmPackage.versions[ version ] ) {
throw new Error( `jQuery ${ version } not found on npm!` );
}
const npmTarball = npmPackage.versions[ version ].dist.tarball;
// Write npm tarball to file
const npmTarballPath = path.join( "tmp/verify", version, "npm.tgz" );
await downloadFile( npmTarball, npmTarballPath );
// Check the tarball checksum
const tgzSum = await sumTarball( npmTarballPath );
if ( tgzSum !== release.tgz.contents ) {
mismatchingFiles.push( `npm:${ version }.tgz` );
verified = false;
} else {
matchingFiles.push( `npm:${ version }.tgz` );
}
await Promise.all(
release.files.map( async( file ) => {
// Get file contents from tarball
const { stdout: npmContents } = await exec(
`tar -xOf ${ npmTarballPath } package/${ file.path }/${ file.name }`
);
if ( npmContents !== file.contents ) {
mismatchingFiles.push( `npm:${ file.path }/${ file.name }` );
verified = false;
} else {
matchingFiles.push( `npm:${ file.path }/${ file.name }` );
}
} )
);
if ( verified ) {
console.log( `jQuery ${ version } is reproducible! All files match!` );
} else {
console.log();
for ( const file of matchingFiles ) {
console.log( `✅ ${ file }` );
}
console.log();
for ( const file of mismatchingFiles ) {
console.log( `❌ ${ file }` );
}
throw new Error( `jQuery ${ version } is NOT reproducible!` );
}
}
async function buildRelease( { version } ) {
const releaseFolder = path.join( "tmp/verify", version );
const distFolder = path.join( releaseFolder, "tmp/release/dist" );
// Clone the release repo
console.log( `Cloning jQuery ${ version }...` );
await rimraf( releaseFolder );
await mkdir( releaseFolder, { recursive: true } );
// Uses a depth of 2 so we can get the commit date of
// the commit used to build, which is the commit before the tag
await exec(
`git clone -q -b ${ version } --depth=2 ${ SRC_REPO } ${ releaseFolder }`
);
// Install node dependencies
console.log( `Installing dependencies for jQuery ${ version }...` );
await exec( "npm ci", { cwd: releaseFolder } );
// Find the date of the commit just before the release,
// which was used as the date in the built files
const { stdout: date } = await exec( "git log -1 --format=%ci HEAD~1", {
cwd: releaseFolder
} );
// Build the release
console.log( `Building jQuery ${ version }...` );
const { stdout: buildOutput } = await exec( "npm run build:all", {
cwd: releaseFolder,
env: {
// Keep existing environment variables
...process.env,
RELEASE_DATE: date,
VERSION: version
}
} );
console.log( buildOutput );
// Clone the dist repo
console.log( `Cloning jquery-dist ${ version }...` );
await rimraf( distFolder );
await mkdir( distFolder, { recursive: true } );
// NOTE: the tag may not have been pushed to the dist repo yet;
// retries have been added to the verify GH workflow.
await exec( `git clone -q -b ${ version } ${ DIST_REPO } ${ distFolder }` );
// Get the blog URL from the dist README
const blogUrl = await getBlogUrl( { distFolder } );
// Run the dist script to prepare files for packing
console.log( `Preparing jQuery ${ version } for packaging...` );
const { stdout: distOutput } = await exec( `npm run release:dist ${ version } ${ blogUrl }`, {
cwd: releaseFolder
} );
console.log( distOutput );
// Verify that the git status is clean
const { stdout: gitStatus } = await exec( "git status --porcelain", {
cwd: distFolder
} );
if ( gitStatus.trim() ) {
console.log( gitStatus );
throw new Error( "Dist repo has uncommitted changes after dist!" );
}
// Pack the npm tarball
console.log( `Packing jQuery ${ version }...` );
const { stdout: packOutput } = await exec( "npm pack", { cwd: distFolder } );
console.log( packOutput );
// Get all top-level /dist and /dist-module files
const distFiles = await readdir(
path.join( releaseFolder, "dist" ),
{ withFileTypes: true }
);
const distModuleFiles = await readdir(
path.join( releaseFolder, "dist-module" ),
{ withFileTypes: true }
);
const files = await Promise.all(
[ ...distFiles, ...distModuleFiles ]
.filter( ( dirent ) => dirent.isFile() )
.map( async( dirent ) => {
const contents = await readFile(
path.join( dirent.parentPath, dirent.name ),
"utf8"
);
return {
name: dirent.name,
path: path.basename( dirent.parentPath ),
contents,
cdnName: dirent.name.replace( rjquery, `jquery-${ version }` ),
cdnContents: dirent.name.endsWith( ".map" ) ?
// The CDN has versioned filenames in the maps
convertMapToVersioned( contents, version ) :
contents
};
} )
);
// Get checksum of the tarball
const tgzFilename = `jquery-${ version }.tgz`;
const sum = await sumTarball( path.join( distFolder, tgzFilename ) );
return {
files,
tgz: {
name: tgzFilename,
contents: sum
},
version
};
}
async function getBlogUrl( { distFolder } ) {
// Read the README.md file
console.log( "Getting blog URL from README.md..." );
const readme = await readFile(
path.join( distFolder, "README.md" ),
"utf8"
);
const blogUrl = rblogUrl.exec( readme );
if ( !blogUrl ) {
throw new Error( "Invalid blog post URL" );
}
console.log( `Blog URL: ${ blogUrl[ 0 ] }` );
return blogUrl[ 0 ];
}
async function downloadFile( url, dest ) {
const response = await fetch( url );
const fileStream = createWriteStream( dest );
const stream = Readable.fromWeb( response.body ).pipe( fileStream );
return finished( stream );
}
async function getLatestVersion() {
const { stdout: sha } = await exec( "git rev-list --tags --max-count=1" );
const { stdout: tag } = await exec( `git describe --tags ${ sha.trim() }` );
return tag.trim();
}
function shasum( data ) {
const hash = crypto.createHash( "sha256" );
hash.update( data );
return hash.digest( "hex" );
}
async function sumTarball( filepath ) {
const contents = await readFile( filepath );
const unzipped = await gunzip( contents );
return shasum( unzipped );
}
function convertMapToVersioned( contents, version ) {
const map = JSON.parse( contents );
return JSON.stringify( {
...map,
file: map.file.replace( rjquery, `jquery-${ version }` ),
sources: map.sources.map( ( source ) => source.replace( rjquery, `jquery-${ version }` ) )
} );
}
verifyRelease();
| javascript | MIT | 546a1eb03c345e1bafb72ae1aeb898abb5b3e51b | 2026-01-04T14:56:53.033090Z | false |
jquery/jquery | https://github.com/jquery/jquery/blob/546a1eb03c345e1bafb72ae1aeb898abb5b3e51b/build/release/dist.js | build/release/dist.js | import { readFile, writeFile } from "node:fs/promises";
import util from "node:util";
import { argv } from "node:process";
import { exec as nodeExec } from "node:child_process";
import { rimraf } from "rimraf";
const pkg = JSON.parse( await readFile( "./package.json", "utf8" ) );
const exec = util.promisify( nodeExec );
const version = argv[ 2 ];
const blogURL = argv[ 3 ];
if ( !version ) {
throw new Error( "No version specified" );
}
if ( !blogURL || !blogURL.startsWith( "https://blog.jquery.com/" ) ) {
throw new Error( "Invalid blog post URL" );
}
// The dist repo is cloned during release
const distRepoFolder = "tmp/release/dist";
// Files to be included in the dist repo.
// README.md and bower.json are generated.
// package.json is a simplified version of the original.
const files = [
"dist",
"dist-module",
"src",
"LICENSE.txt",
"AUTHORS.txt",
"changelog.md"
];
async function generateBower() {
return JSON.stringify(
{
name: pkg.name,
main: pkg.main,
license: "MIT",
ignore: [ "package.json" ],
keywords: pkg.keywords
},
null,
2
);
}
async function generateReadme() {
const readme = await readFile(
"./build/fixtures/README.md",
"utf8"
);
return readme
.replace( /@VERSION/g, version )
.replace( /@BLOG_POST_LINK/g, blogURL );
}
/**
* Copy necessary files over to the dist repo
*/
async function copyFiles() {
// Remove any extraneous files before copy
await rimraf( [
`${ distRepoFolder }/dist`,
`${ distRepoFolder }/dist-module`,
`${ distRepoFolder }/src`
] );
// Copy all files
await Promise.all(
files.map( function( path ) {
console.log( `Copying ${ path }...` );
return exec( `cp -rf ${ path } ${ distRepoFolder }/${ path }` );
} )
);
// Remove the wrapper from the dist repo
await rimraf( [
`${ distRepoFolder }/src/wrapper.js`
] );
// Set the version in src/core.js
const core = await readFile( `${ distRepoFolder }/src/core.js`, "utf8" );
await writeFile(
`${ distRepoFolder }/src/core.js`,
core.replace( /@VERSION/g, version )
);
// Write generated README
console.log( "Generating README.md..." );
const readme = await generateReadme();
await writeFile( `${ distRepoFolder }/README.md`, readme );
// Write generated Bower file
console.log( "Generating bower.json..." );
const bower = await generateBower();
await writeFile( `${ distRepoFolder }/bower.json`, bower );
// Write simplified package.json
console.log( "Writing package.json..." );
await writeFile(
`${ distRepoFolder }/package.json`,
JSON.stringify(
{
...pkg,
scripts: undefined,
dependencies: undefined,
devDependencies: undefined,
commitplease: undefined
},
null,
2
// Add final newline
) + "\n"
);
console.log( "Files copied to dist repo." );
}
copyFiles();
| javascript | MIT | 546a1eb03c345e1bafb72ae1aeb898abb5b3e51b | 2026-01-04T14:56:53.033090Z | false |
jquery/jquery | https://github.com/jquery/jquery/blob/546a1eb03c345e1bafb72ae1aeb898abb5b3e51b/build/release/changelog.js | build/release/changelog.js | import { writeFile } from "node:fs/promises";
import { argv } from "node:process";
import { exec as nodeExec } from "node:child_process";
import util from "node:util";
import { marked } from "marked";
const exec = util.promisify( nodeExec );
const rbeforeHash = /.#$/;
const rendsWithHash = /#$/;
const rcherry = / \(cherry picked from commit [^)]+\)/;
const rcommit = /Fix(?:e[sd])? ((?:[a-zA-Z0-9_-]{1,39}\/[a-zA-Z0-9_-]{1,100}#)|#|gh-)(\d+)/g;
const rcomponent = /^([^ :]+):\s*([^\n]+)/;
const rnewline = /\r?\n/;
const prevVersion = argv[ 2 ];
const nextVersion = argv[ 3 ];
const blogUrl = process.env.BLOG_URL;
if ( !prevVersion || !nextVersion ) {
throw new Error( "Usage: `node changelog.js PREV_VERSION NEXT_VERSION`" );
}
function ticketUrl( ticketId ) {
return `https://github.com/jquery/jquery/issues/${ ticketId }`;
}
function getTicketsForCommit( commit ) {
var tickets = [];
commit.replace( rcommit, function( _match, refType, ticketId ) {
var ticket = {
url: ticketUrl( ticketId ),
label: "#" + ticketId
};
// If the refType has anything before the #, assume it's a GitHub ref
if ( rbeforeHash.test( refType ) ) {
// console.log( refType );
refType = refType.replace( rendsWithHash, "" );
ticket.url = `https://github.com/${ refType }/issues/${ ticketId }`;
ticket.label = refType + ticket.label;
}
tickets.push( ticket );
} );
return tickets;
}
async function getCommits() {
const format =
"__COMMIT__%n%s (__TICKETREF__[%h](https://github.com/jquery/jquery/commit/%H))%n%b";
const { stdout } = await exec(
`git log --format="${ format }" ${ prevVersion }..${ nextVersion }`
);
const commits = stdout.split( "__COMMIT__" ).slice( 1 );
return removeReverts( commits.map( parseCommit ).sort( sortCommits ) );
}
function parseCommit( commit ) {
const tickets = getTicketsForCommit( commit )
.map( ( ticket ) => {
return `[${ ticket.label }](${ ticket.url })`;
} )
.join( ", " );
// Drop the commit message body
let message = `${ commit.trim().split( rnewline )[ 0 ] }`;
// Add any ticket references
message = message.replace( "__TICKETREF__", tickets ? `${ tickets }, ` : "" );
// Remove cherry pick references
message = message.replace( rcherry, "" );
return message;
}
function sortCommits( a, b ) {
const aComponent = rcomponent.exec( a );
const bComponent = rcomponent.exec( b );
if ( aComponent && bComponent ) {
if ( aComponent[ 1 ] < bComponent[ 1 ] ) {
return -1;
}
if ( aComponent[ 1 ] > bComponent[ 1 ] ) {
return 1;
}
return 0;
}
if ( a < b ) {
return -1;
}
if ( a > b ) {
return 1;
}
return 0;
}
/**
* Remove all revert commits and the commit it is reverting
*/
function removeReverts( commits ) {
const remove = [];
commits.forEach( function( commit ) {
const match = /\*\s*Revert "([^"]*)"/.exec( commit );
// Ignore double reverts
if ( match && !/^Revert "([^"]*)"/.test( match[ 0 ] ) ) {
remove.push( commit, match[ 0 ] );
}
} );
remove.forEach( function( message ) {
const index = commits.findIndex( ( commit ) => commit.includes( message ) );
if ( index > -1 ) {
// console.log( "Removing ", commits[ index ] );
commits.splice( index, 1 );
}
} );
return commits;
}
function addHeaders( commits ) {
const components = {};
let markdown = "";
commits.forEach( function( commit ) {
const match = rcomponent.exec( commit );
if ( match ) {
let component = match[ 1 ];
if ( !/^[A-Z]/.test( component ) ) {
component =
component.slice( 0, 1 ).toUpperCase() +
component.slice( 1 ).toLowerCase();
}
if ( !components[ component.toLowerCase() ] ) {
markdown += "\n## " + component + "\n\n";
components[ component.toLowerCase() ] = true;
}
markdown += `- ${ match[ 2 ] }\n`;
} else {
markdown += `- ${ commit }\n`;
}
} );
return markdown;
}
async function getGitHubContributor( sha ) {
const response = await fetch(
`https://api.github.com/repos/jquery/jquery/commits/${ sha }`,
{
headers: {
Accept: "application/vnd.github+json",
Authorization: `Bearer ${ process.env.JQUERY_GITHUB_TOKEN }`,
"X-GitHub-Api-Version": "2022-11-28"
}
}
);
const data = await response.json();
if ( !data.commit || !data.author ) {
// The data may contain multiple helpful fields
throw new Error( JSON.stringify( data ) );
}
return { name: data.commit.author.name, url: data.author.html_url };
}
function uniqueContributors( contributors ) {
const seen = {};
return contributors.filter( ( contributor ) => {
if ( seen[ contributor.name ] ) {
return false;
}
seen[ contributor.name ] = true;
return true;
} );
}
async function getContributors() {
const { stdout } = await exec(
`git log --format="%H" ${ prevVersion }..${ nextVersion }`
);
const shas = stdout.split( rnewline ).filter( Boolean );
const contributors = await Promise.all( shas.map( getGitHubContributor ) );
return uniqueContributors( contributors )
// Sort by last name
.sort( ( a, b ) => {
const aName = a.name.split( " " );
const bName = b.name.split( " " );
return aName[ aName.length - 1 ].localeCompare( bName[ bName.length - 1 ] );
} )
.map( ( { name, url } ) => {
if ( name === "Timmy Willison" || name.includes( "dependabot" ) ) {
return;
}
return `<a href="${ url }">${ name }</a>`;
} )
.filter( Boolean ).join( "\n" );
}
async function generate() {
const commits = await getCommits();
const contributors = await getContributors();
let changelog = "# Changelog\n";
if ( blogUrl ) {
changelog += `\n${ blogUrl }\n`;
}
changelog += addHeaders( commits );
// Write markdown to changelog.md
await writeFile( "changelog.md", changelog );
// Write HTML to changelog.html for blog post
await writeFile( "changelog.html", marked.parse( changelog ) );
// Write contributors HTML for blog post
await writeFile( "contributors.html", contributors );
// Log regular changelog for release-it
console.log( changelog );
return changelog;
}
generate();
| javascript | MIT | 546a1eb03c345e1bafb72ae1aeb898abb5b3e51b | 2026-01-04T14:56:53.033090Z | false |
jquery/jquery | https://github.com/jquery/jquery/blob/546a1eb03c345e1bafb72ae1aeb898abb5b3e51b/dist/wrappers/jquery.bundler-require-wrapper.js | dist/wrappers/jquery.bundler-require-wrapper.js | "use strict";
// Bundlers are able to synchronously require an ESM module from a CommonJS one.
const { jQuery } = require( "../../dist-module/jquery.module.js" );
module.exports = jQuery;
| javascript | MIT | 546a1eb03c345e1bafb72ae1aeb898abb5b3e51b | 2026-01-04T14:56:53.033090Z | false |
jquery/jquery | https://github.com/jquery/jquery/blob/546a1eb03c345e1bafb72ae1aeb898abb5b3e51b/dist/wrappers/jquery.bundler-require-wrapper.slim.js | dist/wrappers/jquery.bundler-require-wrapper.slim.js | "use strict";
// Bundlers are able to synchronously require an ESM module from a CommonJS one.
const { jQuery } = require( "../../dist-module/jquery.slim.module.js" );
module.exports = jQuery;
| javascript | MIT | 546a1eb03c345e1bafb72ae1aeb898abb5b3e51b | 2026-01-04T14:56:53.033090Z | false |
jquery/jquery | https://github.com/jquery/jquery/blob/546a1eb03c345e1bafb72ae1aeb898abb5b3e51b/dist-module/wrappers/jquery.node-module-wrapper.slim.js | dist-module/wrappers/jquery.node-module-wrapper.slim.js | // Node.js is able to import from a CommonJS module in an ESM one.
import jQuery from "../../dist/jquery.slim.js";
export { jQuery, jQuery as $ };
export default jQuery;
| javascript | MIT | 546a1eb03c345e1bafb72ae1aeb898abb5b3e51b | 2026-01-04T14:56:53.033090Z | false |
jquery/jquery | https://github.com/jquery/jquery/blob/546a1eb03c345e1bafb72ae1aeb898abb5b3e51b/dist-module/wrappers/jquery.node-module-wrapper.js | dist-module/wrappers/jquery.node-module-wrapper.js | // Node.js is able to import from a CommonJS module in an ESM one.
import jQuery from "../../dist/jquery.js";
export { jQuery, jQuery as $ };
export default jQuery;
| javascript | MIT | 546a1eb03c345e1bafb72ae1aeb898abb5b3e51b | 2026-01-04T14:56:53.033090Z | false |
h5bp/html5-boilerplate | https://github.com/h5bp/html5-boilerplate/blob/091a35738202b6dd03947368a95491af87e71dc8/src/webpack.config.prod.js | src/webpack.config.prod.js | const { merge } = require('webpack-merge');
const common = require('./webpack.common.js');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CopyPlugin = require('copy-webpack-plugin');
module.exports = merge(common, {
mode: 'production',
plugins: [
new HtmlWebpackPlugin({
template: './index.html',
}),
new CopyPlugin({
patterns: [
{ from: 'img', to: 'img' },
{ from: 'css', to: 'css' },
{ from: 'js/vendor', to: 'js/vendor' },
{ from: 'icon.svg', to: 'icon.svg' },
{ from: 'favicon.ico', to: 'favicon.ico' },
{ from: 'robots.txt', to: 'robots.txt' },
{ from: 'icon.png', to: 'icon.png' },
{ from: '404.html', to: '404.html' },
{ from: 'site.webmanifest', to: 'site.webmanifest' },
],
}),
],
});
| javascript | MIT | 091a35738202b6dd03947368a95491af87e71dc8 | 2026-01-04T14:56:59.311162Z | false |
h5bp/html5-boilerplate | https://github.com/h5bp/html5-boilerplate/blob/091a35738202b6dd03947368a95491af87e71dc8/src/webpack.config.dev.js | src/webpack.config.dev.js | const { merge } = require('webpack-merge');
const common = require('./webpack.common.js');
module.exports = merge(common, {
mode: 'development',
devtool: 'inline-source-map',
devServer: {
liveReload: true,
hot: true,
open: true,
static: ['./'],
},
});
| javascript | MIT | 091a35738202b6dd03947368a95491af87e71dc8 | 2026-01-04T14:56:59.311162Z | false |
h5bp/html5-boilerplate | https://github.com/h5bp/html5-boilerplate/blob/091a35738202b6dd03947368a95491af87e71dc8/src/webpack.common.js | src/webpack.common.js | const path = require('path');
module.exports = {
entry: {
app: './js/app.js',
},
output: {
path: path.resolve(__dirname, 'dist'),
clean: true,
filename: './js/app.js',
},
};
| javascript | MIT | 091a35738202b6dd03947368a95491af87e71dc8 | 2026-01-04T14:56:59.311162Z | false |
h5bp/html5-boilerplate | https://github.com/h5bp/html5-boilerplate/blob/091a35738202b6dd03947368a95491af87e71dc8/src/js/app.js | src/js/app.js | javascript | MIT | 091a35738202b6dd03947368a95491af87e71dc8 | 2026-01-04T14:56:59.311162Z | false | |
h5bp/html5-boilerplate | https://github.com/h5bp/html5-boilerplate/blob/091a35738202b6dd03947368a95491af87e71dc8/dist/webpack.config.prod.js | dist/webpack.config.prod.js | const { merge } = require('webpack-merge');
const common = require('./webpack.common.js');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CopyPlugin = require('copy-webpack-plugin');
module.exports = merge(common, {
mode: 'production',
plugins: [
new HtmlWebpackPlugin({
template: './index.html',
}),
new CopyPlugin({
patterns: [
{ from: 'img', to: 'img' },
{ from: 'css', to: 'css' },
{ from: 'js/vendor', to: 'js/vendor' },
{ from: 'icon.svg', to: 'icon.svg' },
{ from: 'favicon.ico', to: 'favicon.ico' },
{ from: 'robots.txt', to: 'robots.txt' },
{ from: 'icon.png', to: 'icon.png' },
{ from: '404.html', to: '404.html' },
{ from: 'site.webmanifest', to: 'site.webmanifest' },
],
}),
],
});
| javascript | MIT | 091a35738202b6dd03947368a95491af87e71dc8 | 2026-01-04T14:56:59.311162Z | false |
h5bp/html5-boilerplate | https://github.com/h5bp/html5-boilerplate/blob/091a35738202b6dd03947368a95491af87e71dc8/dist/webpack.config.dev.js | dist/webpack.config.dev.js | const { merge } = require('webpack-merge');
const common = require('./webpack.common.js');
module.exports = merge(common, {
mode: 'development',
devtool: 'inline-source-map',
devServer: {
liveReload: true,
hot: true,
open: true,
static: ['./'],
},
});
| javascript | MIT | 091a35738202b6dd03947368a95491af87e71dc8 | 2026-01-04T14:56:59.311162Z | false |
h5bp/html5-boilerplate | https://github.com/h5bp/html5-boilerplate/blob/091a35738202b6dd03947368a95491af87e71dc8/dist/webpack.common.js | dist/webpack.common.js | const path = require('path');
module.exports = {
entry: {
app: './js/app.js',
},
output: {
path: path.resolve(__dirname, 'dist'),
clean: true,
filename: './js/app.js',
},
};
| javascript | MIT | 091a35738202b6dd03947368a95491af87e71dc8 | 2026-01-04T14:56:59.311162Z | false |
h5bp/html5-boilerplate | https://github.com/h5bp/html5-boilerplate/blob/091a35738202b6dd03947368a95491af87e71dc8/dist/js/app.js | dist/js/app.js | javascript | MIT | 091a35738202b6dd03947368a95491af87e71dc8 | 2026-01-04T14:56:59.311162Z | false | |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/rollup.config.js | rollup.config.js | import cleanup from 'rollup-plugin-cleanup';
import json from '@rollup/plugin-json';
import resolve from '@rollup/plugin-node-resolve';
import {swc} from 'rollup-plugin-swc3';
import {terser} from 'rollup-plugin-terser';
import {readFileSync} from 'fs';
const {version, homepage} = JSON.parse(readFileSync('./package.json'));
const banner = `/*!
* Chart.js v${version}
* ${homepage}
* (c) ${(new Date(process.env.SOURCE_DATE_EPOCH ? (process.env.SOURCE_DATE_EPOCH * 1000) : new Date().getTime())).getFullYear()} Chart.js Contributors
* Released under the MIT License
*/`;
const extensions = ['.js', '.ts'];
const plugins = (minify) =>
[
json(),
resolve({
extensions
}),
swc({
jsc: {
parser: {
syntax: 'typescript'
},
target: 'es2022'
},
module: {
type: 'es6'
},
sourceMaps: true
}),
minify
? terser({
output: {
preamble: banner
}
})
: cleanup({
comments: ['some', /__PURE__/]
})
];
export default [
// UMD build
// dist/chart.umd.min.js
{
input: 'src/index.umd.ts',
plugins: plugins(true),
output: {
name: 'Chart',
file: 'dist/chart.umd.min.js',
format: 'umd',
indent: false,
sourcemap: true,
},
},
// UMD build
// dist/chart.umd.js (old filename)
{
input: 'src/index.umd.ts',
plugins: plugins(true),
output: {
name: 'Chart',
file: 'dist/chart.umd.js',
format: 'umd',
indent: false,
sourcemap: true,
},
},
// ES6 builds
// dist/chart.js
// helpers/*.js
{
input: {
'dist/chart': 'src/index.ts',
'dist/helpers': 'src/helpers/index.ts'
},
plugins: plugins(),
external: _ => (/node_modules/).test(_),
output: {
dir: './',
chunkFileNames: 'dist/chunks/[name].js',
entryFileNames: '[name].js',
banner,
format: 'esm',
indent: false,
sourcemap: true,
},
},
// CommonJS builds
// dist/chart.js
// helpers/*.js
{
input: {
'dist/chart': 'src/index.ts',
'dist/helpers': 'src/helpers/index.ts'
},
plugins: plugins(),
external: _ => (/node_modules/).test(_),
output: {
dir: './',
chunkFileNames: 'dist/chunks/[name].cjs',
entryFileNames: '[name].cjs',
banner,
format: 'commonjs',
indent: false,
sourcemap: true,
},
}
];
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/helpers/helpers.js | helpers/helpers.js | export * from '../dist/helpers.js';
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/scales/scale.time.js | src/scales/scale.time.js | import adapters from '../core/core.adapters.js';
import {callback as call, isFinite, isNullOrUndef, mergeIf, valueOrDefault} from '../helpers/helpers.core.js';
import {toRadians, isNumber, _limitValue} from '../helpers/helpers.math.js';
import Scale from '../core/core.scale.js';
import {_arrayUnique, _filterBetween, _lookup} from '../helpers/helpers.collection.js';
/**
* @typedef { import('../core/core.adapters.js').TimeUnit } Unit
* @typedef {{common: boolean, size: number, steps?: number}} Interval
* @typedef { import('../core/core.adapters.js').DateAdapter } DateAdapter
*/
/**
* @type {Object<Unit, Interval>}
*/
const INTERVALS = {
millisecond: {common: true, size: 1, steps: 1000},
second: {common: true, size: 1000, steps: 60},
minute: {common: true, size: 60000, steps: 60},
hour: {common: true, size: 3600000, steps: 24},
day: {common: true, size: 86400000, steps: 30},
week: {common: false, size: 604800000, steps: 4},
month: {common: true, size: 2.628e9, steps: 12},
quarter: {common: false, size: 7.884e9, steps: 4},
year: {common: true, size: 3.154e10}
};
/**
* @type {Unit[]}
*/
const UNITS = /** @type Unit[] */ /* #__PURE__ */ (Object.keys(INTERVALS));
/**
* @param {number} a
* @param {number} b
*/
function sorter(a, b) {
return a - b;
}
/**
* @param {TimeScale} scale
* @param {*} input
* @return {number}
*/
function parse(scale, input) {
if (isNullOrUndef(input)) {
return null;
}
const adapter = scale._adapter;
const {parser, round, isoWeekday} = scale._parseOpts;
let value = input;
if (typeof parser === 'function') {
value = parser(value);
}
// Only parse if it's not a timestamp already
if (!isFinite(value)) {
value = typeof parser === 'string'
? adapter.parse(value, parser)
: adapter.parse(value);
}
if (value === null) {
return null;
}
if (round) {
value = round === 'week' && (isNumber(isoWeekday) || isoWeekday === true)
? adapter.startOf(value, 'isoWeek', isoWeekday)
: adapter.startOf(value, round);
}
return +value;
}
/**
* Figures out what unit results in an appropriate number of auto-generated ticks
* @param {Unit} minUnit
* @param {number} min
* @param {number} max
* @param {number} capacity
* @return {object}
*/
function determineUnitForAutoTicks(minUnit, min, max, capacity) {
const ilen = UNITS.length;
for (let i = UNITS.indexOf(minUnit); i < ilen - 1; ++i) {
const interval = INTERVALS[UNITS[i]];
const factor = interval.steps ? interval.steps : Number.MAX_SAFE_INTEGER;
if (interval.common && Math.ceil((max - min) / (factor * interval.size)) <= capacity) {
return UNITS[i];
}
}
return UNITS[ilen - 1];
}
/**
* Figures out what unit to format a set of ticks with
* @param {TimeScale} scale
* @param {number} numTicks
* @param {Unit} minUnit
* @param {number} min
* @param {number} max
* @return {Unit}
*/
function determineUnitForFormatting(scale, numTicks, minUnit, min, max) {
for (let i = UNITS.length - 1; i >= UNITS.indexOf(minUnit); i--) {
const unit = UNITS[i];
if (INTERVALS[unit].common && scale._adapter.diff(max, min, unit) >= numTicks - 1) {
return unit;
}
}
return UNITS[minUnit ? UNITS.indexOf(minUnit) : 0];
}
/**
* @param {Unit} unit
* @return {object}
*/
function determineMajorUnit(unit) {
for (let i = UNITS.indexOf(unit) + 1, ilen = UNITS.length; i < ilen; ++i) {
if (INTERVALS[UNITS[i]].common) {
return UNITS[i];
}
}
}
/**
* @param {object} ticks
* @param {number} time
* @param {number[]} [timestamps] - if defined, snap to these timestamps
*/
function addTick(ticks, time, timestamps) {
if (!timestamps) {
ticks[time] = true;
} else if (timestamps.length) {
const {lo, hi} = _lookup(timestamps, time);
const timestamp = timestamps[lo] >= time ? timestamps[lo] : timestamps[hi];
ticks[timestamp] = true;
}
}
/**
* @param {TimeScale} scale
* @param {object[]} ticks
* @param {object} map
* @param {Unit} majorUnit
* @return {object[]}
*/
function setMajorTicks(scale, ticks, map, majorUnit) {
const adapter = scale._adapter;
const first = +adapter.startOf(ticks[0].value, majorUnit);
const last = ticks[ticks.length - 1].value;
let major, index;
for (major = first; major <= last; major = +adapter.add(major, 1, majorUnit)) {
index = map[major];
if (index >= 0) {
ticks[index].major = true;
}
}
return ticks;
}
/**
* @param {TimeScale} scale
* @param {number[]} values
* @param {Unit|undefined} [majorUnit]
* @return {object[]}
*/
function ticksFromTimestamps(scale, values, majorUnit) {
const ticks = [];
/** @type {Object<number,object>} */
const map = {};
const ilen = values.length;
let i, value;
for (i = 0; i < ilen; ++i) {
value = values[i];
map[value] = i;
ticks.push({
value,
major: false
});
}
// We set the major ticks separately from the above loop because calling startOf for every tick
// is expensive when there is a large number of ticks
return (ilen === 0 || !majorUnit) ? ticks : setMajorTicks(scale, ticks, map, majorUnit);
}
export default class TimeScale extends Scale {
static id = 'time';
/**
* @type {any}
*/
static defaults = {
/**
* Scale boundary strategy (bypassed by min/max time options)
* - `data`: make sure data are fully visible, ticks outside are removed
* - `ticks`: make sure ticks are fully visible, data outside are truncated
* @see https://github.com/chartjs/Chart.js/pull/4556
* @since 2.7.0
*/
bounds: 'data',
adapters: {},
time: {
parser: false, // false == a pattern string from or a custom callback that converts its argument to a timestamp
unit: false, // false == automatic or override with week, month, year, etc.
round: false, // none, or override with week, month, year, etc.
isoWeekday: false, // override week start day
minUnit: 'millisecond',
displayFormats: {}
},
ticks: {
/**
* Ticks generation input values:
* - 'auto': generates "optimal" ticks based on scale size and time options.
* - 'data': generates ticks from data (including labels from data {t|x|y} objects).
* - 'labels': generates ticks from user given `data.labels` values ONLY.
* @see https://github.com/chartjs/Chart.js/pull/4507
* @since 2.7.0
*/
source: 'auto',
callback: false,
major: {
enabled: false
}
}
};
/**
* @param {object} props
*/
constructor(props) {
super(props);
/** @type {{data: number[], labels: number[], all: number[]}} */
this._cache = {
data: [],
labels: [],
all: []
};
/** @type {Unit} */
this._unit = 'day';
/** @type {Unit=} */
this._majorUnit = undefined;
this._offsets = {};
this._normalized = false;
this._parseOpts = undefined;
}
init(scaleOpts, opts = {}) {
const time = scaleOpts.time || (scaleOpts.time = {});
/** @type {DateAdapter} */
const adapter = this._adapter = new adapters._date(scaleOpts.adapters.date);
adapter.init(opts);
// Backward compatibility: before introducing adapter, `displayFormats` was
// supposed to contain *all* unit/string pairs but this can't be resolved
// when loading the scale (adapters are loaded afterward), so let's populate
// missing formats on update
mergeIf(time.displayFormats, adapter.formats());
this._parseOpts = {
parser: time.parser,
round: time.round,
isoWeekday: time.isoWeekday
};
super.init(scaleOpts);
this._normalized = opts.normalized;
}
/**
* @param {*} raw
* @param {number?} [index]
* @return {number}
*/
parse(raw, index) { // eslint-disable-line no-unused-vars
if (raw === undefined) {
return null;
}
return parse(this, raw);
}
beforeLayout() {
super.beforeLayout();
this._cache = {
data: [],
labels: [],
all: []
};
}
determineDataLimits() {
const options = this.options;
const adapter = this._adapter;
const unit = options.time.unit || 'day';
// eslint-disable-next-line prefer-const
let {min, max, minDefined, maxDefined} = this.getUserBounds();
/**
* @param {object} bounds
*/
function _applyBounds(bounds) {
if (!minDefined && !isNaN(bounds.min)) {
min = Math.min(min, bounds.min);
}
if (!maxDefined && !isNaN(bounds.max)) {
max = Math.max(max, bounds.max);
}
}
// If we have user provided `min` and `max` labels / data bounds can be ignored
if (!minDefined || !maxDefined) {
// Labels are always considered, when user did not force bounds
_applyBounds(this._getLabelBounds());
// If `bounds` is `'ticks'` and `ticks.source` is `'labels'`,
// data bounds are ignored (and don't need to be determined)
if (options.bounds !== 'ticks' || options.ticks.source !== 'labels') {
_applyBounds(this.getMinMax(false));
}
}
min = isFinite(min) && !isNaN(min) ? min : +adapter.startOf(Date.now(), unit);
max = isFinite(max) && !isNaN(max) ? max : +adapter.endOf(Date.now(), unit) + 1;
// Make sure that max is strictly higher than min (required by the timeseries lookup table)
this.min = Math.min(min, max - 1);
this.max = Math.max(min + 1, max);
}
/**
* @private
*/
_getLabelBounds() {
const arr = this.getLabelTimestamps();
let min = Number.POSITIVE_INFINITY;
let max = Number.NEGATIVE_INFINITY;
if (arr.length) {
min = arr[0];
max = arr[arr.length - 1];
}
return {min, max};
}
/**
* @return {object[]}
*/
buildTicks() {
const options = this.options;
const timeOpts = options.time;
const tickOpts = options.ticks;
const timestamps = tickOpts.source === 'labels' ? this.getLabelTimestamps() : this._generate();
if (options.bounds === 'ticks' && timestamps.length) {
this.min = this._userMin || timestamps[0];
this.max = this._userMax || timestamps[timestamps.length - 1];
}
const min = this.min;
const max = this.max;
const ticks = _filterBetween(timestamps, min, max);
// PRIVATE
// determineUnitForFormatting relies on the number of ticks so we don't use it when
// autoSkip is enabled because we don't yet know what the final number of ticks will be
this._unit = timeOpts.unit || (tickOpts.autoSkip
? determineUnitForAutoTicks(timeOpts.minUnit, this.min, this.max, this._getLabelCapacity(min))
: determineUnitForFormatting(this, ticks.length, timeOpts.minUnit, this.min, this.max));
this._majorUnit = !tickOpts.major.enabled || this._unit === 'year' ? undefined
: determineMajorUnit(this._unit);
this.initOffsets(timestamps);
if (options.reverse) {
ticks.reverse();
}
return ticksFromTimestamps(this, ticks, this._majorUnit);
}
afterAutoSkip() {
// Offsets for bar charts need to be handled with the auto skipped
// ticks. Once ticks have been skipped, we re-compute the offsets.
if (this.options.offsetAfterAutoskip) {
this.initOffsets(this.ticks.map(tick => +tick.value));
}
}
/**
* Returns the start and end offsets from edges in the form of {start, end}
* where each value is a relative width to the scale and ranges between 0 and 1.
* They add extra margins on the both sides by scaling down the original scale.
* Offsets are added when the `offset` option is true.
* @param {number[]} timestamps
* @protected
*/
initOffsets(timestamps = []) {
let start = 0;
let end = 0;
let first, last;
if (this.options.offset && timestamps.length) {
first = this.getDecimalForValue(timestamps[0]);
if (timestamps.length === 1) {
start = 1 - first;
} else {
start = (this.getDecimalForValue(timestamps[1]) - first) / 2;
}
last = this.getDecimalForValue(timestamps[timestamps.length - 1]);
if (timestamps.length === 1) {
end = last;
} else {
end = (last - this.getDecimalForValue(timestamps[timestamps.length - 2])) / 2;
}
}
const limit = timestamps.length < 3 ? 0.5 : 0.25;
start = _limitValue(start, 0, limit);
end = _limitValue(end, 0, limit);
this._offsets = {start, end, factor: 1 / (start + 1 + end)};
}
/**
* Generates a maximum of `capacity` timestamps between min and max, rounded to the
* `minor` unit using the given scale time `options`.
* Important: this method can return ticks outside the min and max range, it's the
* responsibility of the calling code to clamp values if needed.
* @protected
*/
_generate() {
const adapter = this._adapter;
const min = this.min;
const max = this.max;
const options = this.options;
const timeOpts = options.time;
// @ts-ignore
const minor = timeOpts.unit || determineUnitForAutoTicks(timeOpts.minUnit, min, max, this._getLabelCapacity(min));
const stepSize = valueOrDefault(options.ticks.stepSize, 1);
const weekday = minor === 'week' ? timeOpts.isoWeekday : false;
const hasWeekday = isNumber(weekday) || weekday === true;
const ticks = {};
let first = min;
let time, count;
// For 'week' unit, handle the first day of week option
if (hasWeekday) {
first = +adapter.startOf(first, 'isoWeek', weekday);
}
// Align first ticks on unit
first = +adapter.startOf(first, hasWeekday ? 'day' : minor);
// Prevent browser from freezing in case user options request millions of milliseconds
if (adapter.diff(max, min, minor) > 100000 * stepSize) {
throw new Error(min + ' and ' + max + ' are too far apart with stepSize of ' + stepSize + ' ' + minor);
}
const timestamps = options.ticks.source === 'data' && this.getDataTimestamps();
for (time = first, count = 0; time < max; time = +adapter.add(time, stepSize, minor), count++) {
addTick(ticks, time, timestamps);
}
if (time === max || options.bounds === 'ticks' || count === 1) {
addTick(ticks, time, timestamps);
}
// @ts-ignore
return Object.keys(ticks).sort(sorter).map(x => +x);
}
/**
* @param {number} value
* @return {string}
*/
getLabelForValue(value) {
const adapter = this._adapter;
const timeOpts = this.options.time;
if (timeOpts.tooltipFormat) {
return adapter.format(value, timeOpts.tooltipFormat);
}
return adapter.format(value, timeOpts.displayFormats.datetime);
}
/**
* @param {number} value
* @param {string|undefined} format
* @return {string}
*/
format(value, format) {
const options = this.options;
const formats = options.time.displayFormats;
const unit = this._unit;
const fmt = format || formats[unit];
return this._adapter.format(value, fmt);
}
/**
* Function to format an individual tick mark
* @param {number} time
* @param {number} index
* @param {object[]} ticks
* @param {string|undefined} [format]
* @return {string}
* @private
*/
_tickFormatFunction(time, index, ticks, format) {
const options = this.options;
const formatter = options.ticks.callback;
if (formatter) {
return call(formatter, [time, index, ticks], this);
}
const formats = options.time.displayFormats;
const unit = this._unit;
const majorUnit = this._majorUnit;
const minorFormat = unit && formats[unit];
const majorFormat = majorUnit && formats[majorUnit];
const tick = ticks[index];
const major = majorUnit && majorFormat && tick && tick.major;
return this._adapter.format(time, format || (major ? majorFormat : minorFormat));
}
/**
* @param {object[]} ticks
*/
generateTickLabels(ticks) {
let i, ilen, tick;
for (i = 0, ilen = ticks.length; i < ilen; ++i) {
tick = ticks[i];
tick.label = this._tickFormatFunction(tick.value, i, ticks);
}
}
/**
* @param {number} value - Milliseconds since epoch (1 January 1970 00:00:00 UTC)
* @return {number}
*/
getDecimalForValue(value) {
return value === null ? NaN : (value - this.min) / (this.max - this.min);
}
/**
* @param {number} value - Milliseconds since epoch (1 January 1970 00:00:00 UTC)
* @return {number}
*/
getPixelForValue(value) {
const offsets = this._offsets;
const pos = this.getDecimalForValue(value);
return this.getPixelForDecimal((offsets.start + pos) * offsets.factor);
}
/**
* @param {number} pixel
* @return {number}
*/
getValueForPixel(pixel) {
const offsets = this._offsets;
const pos = this.getDecimalForPixel(pixel) / offsets.factor - offsets.end;
return this.min + pos * (this.max - this.min);
}
/**
* @param {string} label
* @return {{w:number, h:number}}
* @private
*/
_getLabelSize(label) {
const ticksOpts = this.options.ticks;
const tickLabelWidth = this.ctx.measureText(label).width;
const angle = toRadians(this.isHorizontal() ? ticksOpts.maxRotation : ticksOpts.minRotation);
const cosRotation = Math.cos(angle);
const sinRotation = Math.sin(angle);
const tickFontSize = this._resolveTickFontOptions(0).size;
return {
w: (tickLabelWidth * cosRotation) + (tickFontSize * sinRotation),
h: (tickLabelWidth * sinRotation) + (tickFontSize * cosRotation)
};
}
/**
* @param {number} exampleTime
* @return {number}
* @private
*/
_getLabelCapacity(exampleTime) {
const timeOpts = this.options.time;
const displayFormats = timeOpts.displayFormats;
// pick the longest format (milliseconds) for guesstimation
const format = displayFormats[timeOpts.unit] || displayFormats.millisecond;
const exampleLabel = this._tickFormatFunction(exampleTime, 0, ticksFromTimestamps(this, [exampleTime], this._majorUnit), format);
const size = this._getLabelSize(exampleLabel);
// subtract 1 - if offset then there's one less label than tick
// if not offset then one half label padding is added to each end leaving room for one less label
const capacity = Math.floor(this.isHorizontal() ? this.width / size.w : this.height / size.h) - 1;
return capacity > 0 ? capacity : 1;
}
/**
* @protected
*/
getDataTimestamps() {
let timestamps = this._cache.data || [];
let i, ilen;
if (timestamps.length) {
return timestamps;
}
const metas = this.getMatchingVisibleMetas();
if (this._normalized && metas.length) {
return (this._cache.data = metas[0].controller.getAllParsedValues(this));
}
for (i = 0, ilen = metas.length; i < ilen; ++i) {
timestamps = timestamps.concat(metas[i].controller.getAllParsedValues(this));
}
return (this._cache.data = this.normalize(timestamps));
}
/**
* @protected
*/
getLabelTimestamps() {
const timestamps = this._cache.labels || [];
let i, ilen;
if (timestamps.length) {
return timestamps;
}
const labels = this.getLabels();
for (i = 0, ilen = labels.length; i < ilen; ++i) {
timestamps.push(parse(this, labels[i]));
}
return (this._cache.labels = this._normalized ? timestamps : this.normalize(timestamps));
}
/**
* @param {number[]} values
* @protected
*/
normalize(values) {
// It seems to be somewhat faster to do sorting first
return _arrayUnique(values.sort(sorter));
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/scales/index.js | src/scales/index.js | export {default as CategoryScale} from './scale.category.js';
export {default as LinearScale} from './scale.linear.js';
export {default as LogarithmicScale} from './scale.logarithmic.js';
export {default as RadialLinearScale} from './scale.radialLinear.js';
export {default as TimeScale} from './scale.time.js';
export {default as TimeSeriesScale} from './scale.timeseries.js';
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/scales/scale.radialLinear.js | src/scales/scale.radialLinear.js | import defaults from '../core/core.defaults.js';
import {_longestText, addRoundedRectPath, renderText, _isPointInArea} from '../helpers/helpers.canvas.js';
import {HALF_PI, TAU, toDegrees, toRadians, _normalizeAngle, PI} from '../helpers/helpers.math.js';
import LinearScaleBase from './scale.linearbase.js';
import Ticks from '../core/core.ticks.js';
import {valueOrDefault, isArray, isFinite, callback as callCallback, isNullOrUndef} from '../helpers/helpers.core.js';
import {createContext, toFont, toPadding, toTRBLCorners} from '../helpers/helpers.options.js';
function getTickBackdropHeight(opts) {
const tickOpts = opts.ticks;
if (tickOpts.display && opts.display) {
const padding = toPadding(tickOpts.backdropPadding);
return valueOrDefault(tickOpts.font && tickOpts.font.size, defaults.font.size) + padding.height;
}
return 0;
}
function measureLabelSize(ctx, font, label) {
label = isArray(label) ? label : [label];
return {
w: _longestText(ctx, font.string, label),
h: label.length * font.lineHeight
};
}
function determineLimits(angle, pos, size, min, max) {
if (angle === min || angle === max) {
return {
start: pos - (size / 2),
end: pos + (size / 2)
};
} else if (angle < min || angle > max) {
return {
start: pos - size,
end: pos
};
}
return {
start: pos,
end: pos + size
};
}
/**
* Helper function to fit a radial linear scale with point labels
*/
function fitWithPointLabels(scale) {
// Right, this is really confusing and there is a lot of maths going on here
// The gist of the problem is here: https://gist.github.com/nnnick/696cc9c55f4b0beb8fe9
//
// Reaction: https://dl.dropboxusercontent.com/u/34601363/toomuchscience.gif
//
// Solution:
//
// We assume the radius of the polygon is half the size of the canvas at first
// at each index we check if the text overlaps.
//
// Where it does, we store that angle and that index.
//
// After finding the largest index and angle we calculate how much we need to remove
// from the shape radius to move the point inwards by that x.
//
// We average the left and right distances to get the maximum shape radius that can fit in the box
// along with labels.
//
// Once we have that, we can find the centre point for the chart, by taking the x text protrusion
// on each side, removing that from the size, halving it and adding the left x protrusion width.
//
// This will mean we have a shape fitted to the canvas, as large as it can be with the labels
// and position it in the most space efficient manner
//
// https://dl.dropboxusercontent.com/u/34601363/yeahscience.gif
// Get maximum radius of the polygon. Either half the height (minus the text width) or half the width.
// Use this to calculate the offset + change. - Make sure L/R protrusion is at least 0 to stop issues with centre points
const orig = {
l: scale.left + scale._padding.left,
r: scale.right - scale._padding.right,
t: scale.top + scale._padding.top,
b: scale.bottom - scale._padding.bottom
};
const limits = Object.assign({}, orig);
const labelSizes = [];
const padding = [];
const valueCount = scale._pointLabels.length;
const pointLabelOpts = scale.options.pointLabels;
const additionalAngle = pointLabelOpts.centerPointLabels ? PI / valueCount : 0;
for (let i = 0; i < valueCount; i++) {
const opts = pointLabelOpts.setContext(scale.getPointLabelContext(i));
padding[i] = opts.padding;
const pointPosition = scale.getPointPosition(i, scale.drawingArea + padding[i], additionalAngle);
const plFont = toFont(opts.font);
const textSize = measureLabelSize(scale.ctx, plFont, scale._pointLabels[i]);
labelSizes[i] = textSize;
const angleRadians = _normalizeAngle(scale.getIndexAngle(i) + additionalAngle);
const angle = Math.round(toDegrees(angleRadians));
const hLimits = determineLimits(angle, pointPosition.x, textSize.w, 0, 180);
const vLimits = determineLimits(angle, pointPosition.y, textSize.h, 90, 270);
updateLimits(limits, orig, angleRadians, hLimits, vLimits);
}
scale.setCenterPoint(
orig.l - limits.l,
limits.r - orig.r,
orig.t - limits.t,
limits.b - orig.b
);
// Now that text size is determined, compute the full positions
scale._pointLabelItems = buildPointLabelItems(scale, labelSizes, padding);
}
function updateLimits(limits, orig, angle, hLimits, vLimits) {
const sin = Math.abs(Math.sin(angle));
const cos = Math.abs(Math.cos(angle));
let x = 0;
let y = 0;
if (hLimits.start < orig.l) {
x = (orig.l - hLimits.start) / sin;
limits.l = Math.min(limits.l, orig.l - x);
} else if (hLimits.end > orig.r) {
x = (hLimits.end - orig.r) / sin;
limits.r = Math.max(limits.r, orig.r + x);
}
if (vLimits.start < orig.t) {
y = (orig.t - vLimits.start) / cos;
limits.t = Math.min(limits.t, orig.t - y);
} else if (vLimits.end > orig.b) {
y = (vLimits.end - orig.b) / cos;
limits.b = Math.max(limits.b, orig.b + y);
}
}
function createPointLabelItem(scale, index, itemOpts) {
const outerDistance = scale.drawingArea;
const {extra, additionalAngle, padding, size} = itemOpts;
const pointLabelPosition = scale.getPointPosition(index, outerDistance + extra + padding, additionalAngle);
const angle = Math.round(toDegrees(_normalizeAngle(pointLabelPosition.angle + HALF_PI)));
const y = yForAngle(pointLabelPosition.y, size.h, angle);
const textAlign = getTextAlignForAngle(angle);
const left = leftForTextAlign(pointLabelPosition.x, size.w, textAlign);
return {
// if to draw or overlapped
visible: true,
// Text position
x: pointLabelPosition.x,
y,
// Text rendering data
textAlign,
// Bounding box
left,
top: y,
right: left + size.w,
bottom: y + size.h
};
}
function isNotOverlapped(item, area) {
if (!area) {
return true;
}
const {left, top, right, bottom} = item;
const apexesInArea = _isPointInArea({x: left, y: top}, area) || _isPointInArea({x: left, y: bottom}, area) ||
_isPointInArea({x: right, y: top}, area) || _isPointInArea({x: right, y: bottom}, area);
return !apexesInArea;
}
function buildPointLabelItems(scale, labelSizes, padding) {
const items = [];
const valueCount = scale._pointLabels.length;
const opts = scale.options;
const {centerPointLabels, display} = opts.pointLabels;
const itemOpts = {
extra: getTickBackdropHeight(opts) / 2,
additionalAngle: centerPointLabels ? PI / valueCount : 0
};
let area;
for (let i = 0; i < valueCount; i++) {
itemOpts.padding = padding[i];
itemOpts.size = labelSizes[i];
const item = createPointLabelItem(scale, i, itemOpts);
items.push(item);
if (display === 'auto') {
item.visible = isNotOverlapped(item, area);
if (item.visible) {
area = item;
}
}
}
return items;
}
function getTextAlignForAngle(angle) {
if (angle === 0 || angle === 180) {
return 'center';
} else if (angle < 180) {
return 'left';
}
return 'right';
}
function leftForTextAlign(x, w, align) {
if (align === 'right') {
x -= w;
} else if (align === 'center') {
x -= (w / 2);
}
return x;
}
function yForAngle(y, h, angle) {
if (angle === 90 || angle === 270) {
y -= (h / 2);
} else if (angle > 270 || angle < 90) {
y -= h;
}
return y;
}
function drawPointLabelBox(ctx, opts, item) {
const {left, top, right, bottom} = item;
const {backdropColor} = opts;
if (!isNullOrUndef(backdropColor)) {
const borderRadius = toTRBLCorners(opts.borderRadius);
const padding = toPadding(opts.backdropPadding);
ctx.fillStyle = backdropColor;
const backdropLeft = left - padding.left;
const backdropTop = top - padding.top;
const backdropWidth = right - left + padding.width;
const backdropHeight = bottom - top + padding.height;
if (Object.values(borderRadius).some(v => v !== 0)) {
ctx.beginPath();
addRoundedRectPath(ctx, {
x: backdropLeft,
y: backdropTop,
w: backdropWidth,
h: backdropHeight,
radius: borderRadius,
});
ctx.fill();
} else {
ctx.fillRect(backdropLeft, backdropTop, backdropWidth, backdropHeight);
}
}
}
function drawPointLabels(scale, labelCount) {
const {ctx, options: {pointLabels}} = scale;
for (let i = labelCount - 1; i >= 0; i--) {
const item = scale._pointLabelItems[i];
if (!item.visible) {
// overlapping
continue;
}
const optsAtIndex = pointLabels.setContext(scale.getPointLabelContext(i));
drawPointLabelBox(ctx, optsAtIndex, item);
const plFont = toFont(optsAtIndex.font);
const {x, y, textAlign} = item;
renderText(
ctx,
scale._pointLabels[i],
x,
y + (plFont.lineHeight / 2),
plFont,
{
color: optsAtIndex.color,
textAlign: textAlign,
textBaseline: 'middle'
}
);
}
}
function pathRadiusLine(scale, radius, circular, labelCount) {
const {ctx} = scale;
if (circular) {
// Draw circular arcs between the points
ctx.arc(scale.xCenter, scale.yCenter, radius, 0, TAU);
} else {
// Draw straight lines connecting each index
let pointPosition = scale.getPointPosition(0, radius);
ctx.moveTo(pointPosition.x, pointPosition.y);
for (let i = 1; i < labelCount; i++) {
pointPosition = scale.getPointPosition(i, radius);
ctx.lineTo(pointPosition.x, pointPosition.y);
}
}
}
function drawRadiusLine(scale, gridLineOpts, radius, labelCount, borderOpts) {
const ctx = scale.ctx;
const circular = gridLineOpts.circular;
const {color, lineWidth} = gridLineOpts;
if ((!circular && !labelCount) || !color || !lineWidth || radius < 0) {
return;
}
ctx.save();
ctx.strokeStyle = color;
ctx.lineWidth = lineWidth;
ctx.setLineDash(borderOpts.dash || []);
ctx.lineDashOffset = borderOpts.dashOffset;
ctx.beginPath();
pathRadiusLine(scale, radius, circular, labelCount);
ctx.closePath();
ctx.stroke();
ctx.restore();
}
function createPointLabelContext(parent, index, label) {
return createContext(parent, {
label,
index,
type: 'pointLabel'
});
}
export default class RadialLinearScale extends LinearScaleBase {
static id = 'radialLinear';
/**
* @type {any}
*/
static defaults = {
display: true,
// Boolean - Whether to animate scaling the chart from the centre
animate: true,
position: 'chartArea',
angleLines: {
display: true,
lineWidth: 1,
borderDash: [],
borderDashOffset: 0.0
},
grid: {
circular: false
},
startAngle: 0,
// label settings
ticks: {
// Boolean - Show a backdrop to the scale label
showLabelBackdrop: true,
callback: Ticks.formatters.numeric
},
pointLabels: {
backdropColor: undefined,
// Number - The backdrop padding above & below the label in pixels
backdropPadding: 2,
// Boolean - if true, show point labels
display: true,
// Number - Point label font size in pixels
font: {
size: 10
},
// Function - Used to convert point labels
callback(label) {
return label;
},
// Number - Additionl padding between scale and pointLabel
padding: 5,
// Boolean - if true, center point labels to slices in polar chart
centerPointLabels: false
}
};
static defaultRoutes = {
'angleLines.color': 'borderColor',
'pointLabels.color': 'color',
'ticks.color': 'color'
};
static descriptors = {
angleLines: {
_fallback: 'grid'
}
};
constructor(cfg) {
super(cfg);
/** @type {number} */
this.xCenter = undefined;
/** @type {number} */
this.yCenter = undefined;
/** @type {number} */
this.drawingArea = undefined;
/** @type {string[]} */
this._pointLabels = [];
this._pointLabelItems = [];
}
setDimensions() {
// Set the unconstrained dimension before label rotation
const padding = this._padding = toPadding(getTickBackdropHeight(this.options) / 2);
const w = this.width = this.maxWidth - padding.width;
const h = this.height = this.maxHeight - padding.height;
this.xCenter = Math.floor(this.left + w / 2 + padding.left);
this.yCenter = Math.floor(this.top + h / 2 + padding.top);
this.drawingArea = Math.floor(Math.min(w, h) / 2);
}
determineDataLimits() {
const {min, max} = this.getMinMax(false);
this.min = isFinite(min) && !isNaN(min) ? min : 0;
this.max = isFinite(max) && !isNaN(max) ? max : 0;
// Common base implementation to handle min, max, beginAtZero
this.handleTickRangeOptions();
}
/**
* Returns the maximum number of ticks based on the scale dimension
* @protected
*/
computeTickLimit() {
return Math.ceil(this.drawingArea / getTickBackdropHeight(this.options));
}
generateTickLabels(ticks) {
LinearScaleBase.prototype.generateTickLabels.call(this, ticks);
// Point labels
this._pointLabels = this.getLabels()
.map((value, index) => {
const label = callCallback(this.options.pointLabels.callback, [value, index], this);
return label || label === 0 ? label : '';
})
.filter((v, i) => this.chart.getDataVisibility(i));
}
fit() {
const opts = this.options;
if (opts.display && opts.pointLabels.display) {
fitWithPointLabels(this);
} else {
this.setCenterPoint(0, 0, 0, 0);
}
}
setCenterPoint(leftMovement, rightMovement, topMovement, bottomMovement) {
this.xCenter += Math.floor((leftMovement - rightMovement) / 2);
this.yCenter += Math.floor((topMovement - bottomMovement) / 2);
this.drawingArea -= Math.min(this.drawingArea / 2, Math.max(leftMovement, rightMovement, topMovement, bottomMovement));
}
getIndexAngle(index) {
const angleMultiplier = TAU / (this._pointLabels.length || 1);
const startAngle = this.options.startAngle || 0;
return _normalizeAngle(index * angleMultiplier + toRadians(startAngle));
}
getDistanceFromCenterForValue(value) {
if (isNullOrUndef(value)) {
return NaN;
}
// Take into account half font size + the yPadding of the top value
const scalingFactor = this.drawingArea / (this.max - this.min);
if (this.options.reverse) {
return (this.max - value) * scalingFactor;
}
return (value - this.min) * scalingFactor;
}
getValueForDistanceFromCenter(distance) {
if (isNullOrUndef(distance)) {
return NaN;
}
const scaledDistance = distance / (this.drawingArea / (this.max - this.min));
return this.options.reverse ? this.max - scaledDistance : this.min + scaledDistance;
}
getPointLabelContext(index) {
const pointLabels = this._pointLabels || [];
if (index >= 0 && index < pointLabels.length) {
const pointLabel = pointLabels[index];
return createPointLabelContext(this.getContext(), index, pointLabel);
}
}
getPointPosition(index, distanceFromCenter, additionalAngle = 0) {
const angle = this.getIndexAngle(index) - HALF_PI + additionalAngle;
return {
x: Math.cos(angle) * distanceFromCenter + this.xCenter,
y: Math.sin(angle) * distanceFromCenter + this.yCenter,
angle
};
}
getPointPositionForValue(index, value) {
return this.getPointPosition(index, this.getDistanceFromCenterForValue(value));
}
getBasePosition(index) {
return this.getPointPositionForValue(index || 0, this.getBaseValue());
}
getPointLabelPosition(index) {
const {left, top, right, bottom} = this._pointLabelItems[index];
return {
left,
top,
right,
bottom,
};
}
/**
* @protected
*/
drawBackground() {
const {backgroundColor, grid: {circular}} = this.options;
if (backgroundColor) {
const ctx = this.ctx;
ctx.save();
ctx.beginPath();
pathRadiusLine(this, this.getDistanceFromCenterForValue(this._endValue), circular, this._pointLabels.length);
ctx.closePath();
ctx.fillStyle = backgroundColor;
ctx.fill();
ctx.restore();
}
}
/**
* @protected
*/
drawGrid() {
const ctx = this.ctx;
const opts = this.options;
const {angleLines, grid, border} = opts;
const labelCount = this._pointLabels.length;
let i, offset, position;
if (opts.pointLabels.display) {
drawPointLabels(this, labelCount);
}
if (grid.display) {
this.ticks.forEach((tick, index) => {
if (index !== 0 || (index === 0 && this.min < 0)) {
offset = this.getDistanceFromCenterForValue(tick.value);
const context = this.getContext(index);
const optsAtIndex = grid.setContext(context);
const optsAtIndexBorder = border.setContext(context);
drawRadiusLine(this, optsAtIndex, offset, labelCount, optsAtIndexBorder);
}
});
}
if (angleLines.display) {
ctx.save();
for (i = labelCount - 1; i >= 0; i--) {
const optsAtIndex = angleLines.setContext(this.getPointLabelContext(i));
const {color, lineWidth} = optsAtIndex;
if (!lineWidth || !color) {
continue;
}
ctx.lineWidth = lineWidth;
ctx.strokeStyle = color;
ctx.setLineDash(optsAtIndex.borderDash);
ctx.lineDashOffset = optsAtIndex.borderDashOffset;
offset = this.getDistanceFromCenterForValue(opts.reverse ? this.min : this.max);
position = this.getPointPosition(i, offset);
ctx.beginPath();
ctx.moveTo(this.xCenter, this.yCenter);
ctx.lineTo(position.x, position.y);
ctx.stroke();
}
ctx.restore();
}
}
/**
* @protected
*/
drawBorder() {}
/**
* @protected
*/
drawLabels() {
const ctx = this.ctx;
const opts = this.options;
const tickOpts = opts.ticks;
if (!tickOpts.display) {
return;
}
const startAngle = this.getIndexAngle(0);
let offset, width;
ctx.save();
ctx.translate(this.xCenter, this.yCenter);
ctx.rotate(startAngle);
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
this.ticks.forEach((tick, index) => {
if ((index === 0 && this.min >= 0) && !opts.reverse) {
return;
}
const optsAtIndex = tickOpts.setContext(this.getContext(index));
const tickFont = toFont(optsAtIndex.font);
offset = this.getDistanceFromCenterForValue(this.ticks[index].value);
if (optsAtIndex.showLabelBackdrop) {
ctx.font = tickFont.string;
width = ctx.measureText(tick.label).width;
ctx.fillStyle = optsAtIndex.backdropColor;
const padding = toPadding(optsAtIndex.backdropPadding);
ctx.fillRect(
-width / 2 - padding.left,
-offset - tickFont.size / 2 - padding.top,
width + padding.width,
tickFont.size + padding.height
);
}
renderText(ctx, tick.label, 0, -offset, tickFont, {
color: optsAtIndex.color,
strokeColor: optsAtIndex.textStrokeColor,
strokeWidth: optsAtIndex.textStrokeWidth,
});
});
ctx.restore();
}
/**
* @protected
*/
drawTitle() {}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/scales/scale.logarithmic.js | src/scales/scale.logarithmic.js | import {finiteOrDefault, isFinite} from '../helpers/helpers.core.js';
import {formatNumber} from '../helpers/helpers.intl.js';
import {_setMinAndMaxByKey, log10} from '../helpers/helpers.math.js';
import Scale from '../core/core.scale.js';
import LinearScaleBase from './scale.linearbase.js';
import Ticks from '../core/core.ticks.js';
const log10Floor = v => Math.floor(log10(v));
const changeExponent = (v, m) => Math.pow(10, log10Floor(v) + m);
function isMajor(tickVal) {
const remain = tickVal / (Math.pow(10, log10Floor(tickVal)));
return remain === 1;
}
function steps(min, max, rangeExp) {
const rangeStep = Math.pow(10, rangeExp);
const start = Math.floor(min / rangeStep);
const end = Math.ceil(max / rangeStep);
return end - start;
}
function startExp(min, max) {
const range = max - min;
let rangeExp = log10Floor(range);
while (steps(min, max, rangeExp) > 10) {
rangeExp++;
}
while (steps(min, max, rangeExp) < 10) {
rangeExp--;
}
return Math.min(rangeExp, log10Floor(min));
}
/**
* Generate a set of logarithmic ticks
* @param generationOptions the options used to generate the ticks
* @param dataRange the range of the data
* @returns {object[]} array of tick objects
*/
function generateTicks(generationOptions, {min, max}) {
min = finiteOrDefault(generationOptions.min, min);
const ticks = [];
const minExp = log10Floor(min);
let exp = startExp(min, max);
let precision = exp < 0 ? Math.pow(10, Math.abs(exp)) : 1;
const stepSize = Math.pow(10, exp);
const base = minExp > exp ? Math.pow(10, minExp) : 0;
const start = Math.round((min - base) * precision) / precision;
const offset = Math.floor((min - base) / stepSize / 10) * stepSize * 10;
let significand = Math.floor((start - offset) / Math.pow(10, exp));
let value = finiteOrDefault(generationOptions.min, Math.round((base + offset + significand * Math.pow(10, exp)) * precision) / precision);
while (value < max) {
ticks.push({value, major: isMajor(value), significand});
if (significand >= 10) {
significand = significand < 15 ? 15 : 20;
} else {
significand++;
}
if (significand >= 20) {
exp++;
significand = 2;
precision = exp >= 0 ? 1 : precision;
}
value = Math.round((base + offset + significand * Math.pow(10, exp)) * precision) / precision;
}
const lastTick = finiteOrDefault(generationOptions.max, value);
ticks.push({value: lastTick, major: isMajor(lastTick), significand});
return ticks;
}
export default class LogarithmicScale extends Scale {
static id = 'logarithmic';
/**
* @type {any}
*/
static defaults = {
ticks: {
callback: Ticks.formatters.logarithmic,
major: {
enabled: true
}
}
};
constructor(cfg) {
super(cfg);
/** @type {number} */
this.start = undefined;
/** @type {number} */
this.end = undefined;
/** @type {number} */
this._startValue = undefined;
this._valueRange = 0;
}
parse(raw, index) {
const value = LinearScaleBase.prototype.parse.apply(this, [raw, index]);
if (value === 0) {
this._zero = true;
return undefined;
}
return isFinite(value) && value > 0 ? value : null;
}
determineDataLimits() {
const {min, max} = this.getMinMax(true);
this.min = isFinite(min) ? Math.max(0, min) : null;
this.max = isFinite(max) ? Math.max(0, max) : null;
if (this.options.beginAtZero) {
this._zero = true;
}
// if data has `0` in it or `beginAtZero` is true, min (non zero) value is at bottom
// of scale, and it does not equal suggestedMin, lower the min bound by one exp.
if (this._zero && this.min !== this._suggestedMin && !isFinite(this._userMin)) {
this.min = min === changeExponent(this.min, 0) ? changeExponent(this.min, -1) : changeExponent(this.min, 0);
}
this.handleTickRangeOptions();
}
handleTickRangeOptions() {
const {minDefined, maxDefined} = this.getUserBounds();
let min = this.min;
let max = this.max;
const setMin = v => (min = minDefined ? min : v);
const setMax = v => (max = maxDefined ? max : v);
if (min === max) {
if (min <= 0) { // includes null
setMin(1);
setMax(10);
} else {
setMin(changeExponent(min, -1));
setMax(changeExponent(max, +1));
}
}
if (min <= 0) {
setMin(changeExponent(max, -1));
}
if (max <= 0) {
setMax(changeExponent(min, +1));
}
this.min = min;
this.max = max;
}
buildTicks() {
const opts = this.options;
const generationOptions = {
min: this._userMin,
max: this._userMax
};
const ticks = generateTicks(generationOptions, this);
// At this point, we need to update our max and min given the tick values,
// since we probably have expanded the range of the scale
if (opts.bounds === 'ticks') {
_setMinAndMaxByKey(ticks, this, 'value');
}
if (opts.reverse) {
ticks.reverse();
this.start = this.max;
this.end = this.min;
} else {
this.start = this.min;
this.end = this.max;
}
return ticks;
}
/**
* @param {number} value
* @return {string}
*/
getLabelForValue(value) {
return value === undefined
? '0'
: formatNumber(value, this.chart.options.locale, this.options.ticks.format);
}
/**
* @protected
*/
configure() {
const start = this.min;
super.configure();
this._startValue = log10(start);
this._valueRange = log10(this.max) - log10(start);
}
getPixelForValue(value) {
if (value === undefined || value === 0) {
value = this.min;
}
if (value === null || isNaN(value)) {
return NaN;
}
return this.getPixelForDecimal(value === this.min
? 0
: (log10(value) - this._startValue) / this._valueRange);
}
getValueForPixel(pixel) {
const decimal = this.getDecimalForPixel(pixel);
return Math.pow(10, this._startValue + decimal * this._valueRange);
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/scales/scale.timeseries.js | src/scales/scale.timeseries.js | import TimeScale from './scale.time.js';
import {_lookupByKey} from '../helpers/helpers.collection.js';
/**
* Linearly interpolates the given source `val` using the table. If value is out of bounds, values
* at edges are used for the interpolation.
* @param {object} table
* @param {number} val
* @param {boolean} [reverse] lookup time based on position instead of vice versa
* @return {object}
*/
function interpolate(table, val, reverse) {
let lo = 0;
let hi = table.length - 1;
let prevSource, nextSource, prevTarget, nextTarget;
if (reverse) {
if (val >= table[lo].pos && val <= table[hi].pos) {
({lo, hi} = _lookupByKey(table, 'pos', val));
}
({pos: prevSource, time: prevTarget} = table[lo]);
({pos: nextSource, time: nextTarget} = table[hi]);
} else {
if (val >= table[lo].time && val <= table[hi].time) {
({lo, hi} = _lookupByKey(table, 'time', val));
}
({time: prevSource, pos: prevTarget} = table[lo]);
({time: nextSource, pos: nextTarget} = table[hi]);
}
const span = nextSource - prevSource;
return span ? prevTarget + (nextTarget - prevTarget) * (val - prevSource) / span : prevTarget;
}
class TimeSeriesScale extends TimeScale {
static id = 'timeseries';
/**
* @type {any}
*/
static defaults = TimeScale.defaults;
/**
* @param {object} props
*/
constructor(props) {
super(props);
/** @type {object[]} */
this._table = [];
/** @type {number} */
this._minPos = undefined;
/** @type {number} */
this._tableRange = undefined;
}
/**
* @protected
*/
initOffsets() {
const timestamps = this._getTimestampsForTable();
const table = this._table = this.buildLookupTable(timestamps);
this._minPos = interpolate(table, this.min);
this._tableRange = interpolate(table, this.max) - this._minPos;
super.initOffsets(timestamps);
}
/**
* Returns an array of {time, pos} objects used to interpolate a specific `time` or position
* (`pos`) on the scale, by searching entries before and after the requested value. `pos` is
* a decimal between 0 and 1: 0 being the start of the scale (left or top) and 1 the other
* extremity (left + width or top + height). Note that it would be more optimized to directly
* store pre-computed pixels, but the scale dimensions are not guaranteed at the time we need
* to create the lookup table. The table ALWAYS contains at least two items: min and max.
* @param {number[]} timestamps
* @return {object[]}
* @protected
*/
buildLookupTable(timestamps) {
const {min, max} = this;
const items = [];
const table = [];
let i, ilen, prev, curr, next;
for (i = 0, ilen = timestamps.length; i < ilen; ++i) {
curr = timestamps[i];
if (curr >= min && curr <= max) {
items.push(curr);
}
}
if (items.length < 2) {
// In case there is less that 2 timestamps between min and max, the scale is defined by min and max
return [
{time: min, pos: 0},
{time: max, pos: 1}
];
}
for (i = 0, ilen = items.length; i < ilen; ++i) {
next = items[i + 1];
prev = items[i - 1];
curr = items[i];
// only add points that breaks the scale linearity
if (Math.round((next + prev) / 2) !== curr) {
table.push({time: curr, pos: i / (ilen - 1)});
}
}
return table;
}
/**
* Generates all timestamps defined in the data.
* Important: this method can return ticks outside the min and max range, it's the
* responsibility of the calling code to clamp values if needed.
* @protected
*/
_generate() {
const min = this.min;
const max = this.max;
let timestamps = super.getDataTimestamps();
if (!timestamps.includes(min) || !timestamps.length) {
timestamps.splice(0, 0, min);
}
if (!timestamps.includes(max) || timestamps.length === 1) {
timestamps.push(max);
}
return timestamps.sort((a, b) => a - b);
}
/**
* Returns all timestamps
* @return {number[]}
* @private
*/
_getTimestampsForTable() {
let timestamps = this._cache.all || [];
if (timestamps.length) {
return timestamps;
}
const data = this.getDataTimestamps();
const label = this.getLabelTimestamps();
if (data.length && label.length) {
// If combining labels and data (data might not contain all labels),
// we need to recheck uniqueness and sort
timestamps = this.normalize(data.concat(label));
} else {
timestamps = data.length ? data : label;
}
timestamps = this._cache.all = timestamps;
return timestamps;
}
/**
* @param {number} value - Milliseconds since epoch (1 January 1970 00:00:00 UTC)
* @return {number}
*/
getDecimalForValue(value) {
return (interpolate(this._table, value) - this._minPos) / this._tableRange;
}
/**
* @param {number} pixel
* @return {number}
*/
getValueForPixel(pixel) {
const offsets = this._offsets;
const decimal = this.getDecimalForPixel(pixel) / offsets.factor - offsets.end;
return interpolate(this._table, decimal * this._tableRange + this._minPos, true);
}
}
export default TimeSeriesScale;
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/scales/scale.category.js | src/scales/scale.category.js | import Scale from '../core/core.scale.js';
import {isNullOrUndef, valueOrDefault, _limitValue} from '../helpers/index.js';
const addIfString = (labels, raw, index, addedLabels) => {
if (typeof raw === 'string') {
index = labels.push(raw) - 1;
addedLabels.unshift({index, label: raw});
} else if (isNaN(raw)) {
index = null;
}
return index;
};
function findOrAddLabel(labels, raw, index, addedLabels) {
const first = labels.indexOf(raw);
if (first === -1) {
return addIfString(labels, raw, index, addedLabels);
}
const last = labels.lastIndexOf(raw);
return first !== last ? index : first;
}
const validIndex = (index, max) => index === null ? null : _limitValue(Math.round(index), 0, max);
function _getLabelForValue(value) {
const labels = this.getLabels();
if (value >= 0 && value < labels.length) {
return labels[value];
}
return value;
}
export default class CategoryScale extends Scale {
static id = 'category';
/**
* @type {any}
*/
static defaults = {
ticks: {
callback: _getLabelForValue
}
};
constructor(cfg) {
super(cfg);
/** @type {number} */
this._startValue = undefined;
this._valueRange = 0;
this._addedLabels = [];
}
init(scaleOptions) {
const added = this._addedLabels;
if (added.length) {
const labels = this.getLabels();
for (const {index, label} of added) {
if (labels[index] === label) {
labels.splice(index, 1);
}
}
this._addedLabels = [];
}
super.init(scaleOptions);
}
parse(raw, index) {
if (isNullOrUndef(raw)) {
return null;
}
const labels = this.getLabels();
index = isFinite(index) && labels[index] === raw ? index
: findOrAddLabel(labels, raw, valueOrDefault(index, raw), this._addedLabels);
return validIndex(index, labels.length - 1);
}
determineDataLimits() {
const {minDefined, maxDefined} = this.getUserBounds();
let {min, max} = this.getMinMax(true);
if (this.options.bounds === 'ticks') {
if (!minDefined) {
min = 0;
}
if (!maxDefined) {
max = this.getLabels().length - 1;
}
}
this.min = min;
this.max = max;
}
buildTicks() {
const min = this.min;
const max = this.max;
const offset = this.options.offset;
const ticks = [];
let labels = this.getLabels();
// If we are viewing some subset of labels, slice the original array
labels = (min === 0 && max === labels.length - 1) ? labels : labels.slice(min, max + 1);
this._valueRange = Math.max(labels.length - (offset ? 0 : 1), 1);
this._startValue = this.min - (offset ? 0.5 : 0);
for (let value = min; value <= max; value++) {
ticks.push({value});
}
return ticks;
}
getLabelForValue(value) {
return _getLabelForValue.call(this, value);
}
/**
* @protected
*/
configure() {
super.configure();
if (!this.isHorizontal()) {
// For backward compatibility, vertical category scale reverse is inverted.
this._reversePixels = !this._reversePixels;
}
}
// Used to get data value locations. Value can either be an index or a numerical value
getPixelForValue(value) {
if (typeof value !== 'number') {
value = this.parse(value);
}
return value === null ? NaN : this.getPixelForDecimal((value - this._startValue) / this._valueRange);
}
// Must override base implementation because it calls getPixelForValue
// and category scale can have duplicate values
getPixelForTick(index) {
const ticks = this.ticks;
if (index < 0 || index > ticks.length - 1) {
return null;
}
return this.getPixelForValue(ticks[index].value);
}
getValueForPixel(pixel) {
return Math.round(this._startValue + this.getDecimalForPixel(pixel) * this._valueRange);
}
getBasePixel() {
return this.bottom;
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/scales/scale.linearbase.js | src/scales/scale.linearbase.js | import {isNullOrUndef} from '../helpers/helpers.core.js';
import {almostEquals, almostWhole, niceNum, _decimalPlaces, _setMinAndMaxByKey, sign, toRadians} from '../helpers/helpers.math.js';
import Scale from '../core/core.scale.js';
import {formatNumber} from '../helpers/helpers.intl.js';
/**
* Generate a set of linear ticks for an axis
* 1. If generationOptions.min, generationOptions.max, and generationOptions.step are defined:
* if (max - min) / step is an integer, ticks are generated as [min, min + step, ..., max]
* Note that the generationOptions.maxCount setting is respected in this scenario
*
* 2. If generationOptions.min, generationOptions.max, and generationOptions.count is defined
* spacing = (max - min) / count
* Ticks are generated as [min, min + spacing, ..., max]
*
* 3. If generationOptions.count is defined
* spacing = (niceMax - niceMin) / count
*
* 4. Compute optimal spacing of ticks using niceNum algorithm
*
* @param generationOptions the options used to generate the ticks
* @param dataRange the range of the data
* @returns {object[]} array of tick objects
*/
function generateTicks(generationOptions, dataRange) {
const ticks = [];
// To get a "nice" value for the tick spacing, we will use the appropriately named
// "nice number" algorithm. See https://stackoverflow.com/questions/8506881/nice-label-algorithm-for-charts-with-minimum-ticks
// for details.
const MIN_SPACING = 1e-14;
const {bounds, step, min, max, precision, count, maxTicks, maxDigits, includeBounds} = generationOptions;
const unit = step || 1;
const maxSpaces = maxTicks - 1;
const {min: rmin, max: rmax} = dataRange;
const minDefined = !isNullOrUndef(min);
const maxDefined = !isNullOrUndef(max);
const countDefined = !isNullOrUndef(count);
const minSpacing = (rmax - rmin) / (maxDigits + 1);
let spacing = niceNum((rmax - rmin) / maxSpaces / unit) * unit;
let factor, niceMin, niceMax, numSpaces;
// Beyond MIN_SPACING floating point numbers being to lose precision
// such that we can't do the math necessary to generate ticks
if (spacing < MIN_SPACING && !minDefined && !maxDefined) {
return [{value: rmin}, {value: rmax}];
}
numSpaces = Math.ceil(rmax / spacing) - Math.floor(rmin / spacing);
if (numSpaces > maxSpaces) {
// If the calculated num of spaces exceeds maxNumSpaces, recalculate it
spacing = niceNum(numSpaces * spacing / maxSpaces / unit) * unit;
}
if (!isNullOrUndef(precision)) {
// If the user specified a precision, round to that number of decimal places
factor = Math.pow(10, precision);
spacing = Math.ceil(spacing * factor) / factor;
}
if (bounds === 'ticks') {
niceMin = Math.floor(rmin / spacing) * spacing;
niceMax = Math.ceil(rmax / spacing) * spacing;
} else {
niceMin = rmin;
niceMax = rmax;
}
if (minDefined && maxDefined && step && almostWhole((max - min) / step, spacing / 1000)) {
// Case 1: If min, max and stepSize are set and they make an evenly spaced scale use it.
// spacing = step;
// numSpaces = (max - min) / spacing;
// Note that we round here to handle the case where almostWhole translated an FP error
numSpaces = Math.round(Math.min((max - min) / spacing, maxTicks));
spacing = (max - min) / numSpaces;
niceMin = min;
niceMax = max;
} else if (countDefined) {
// Cases 2 & 3, we have a count specified. Handle optional user defined edges to the range.
// Sometimes these are no-ops, but it makes the code a lot clearer
// and when a user defined range is specified, we want the correct ticks
niceMin = minDefined ? min : niceMin;
niceMax = maxDefined ? max : niceMax;
numSpaces = count - 1;
spacing = (niceMax - niceMin) / numSpaces;
} else {
// Case 4
numSpaces = (niceMax - niceMin) / spacing;
// If very close to our rounded value, use it.
if (almostEquals(numSpaces, Math.round(numSpaces), spacing / 1000)) {
numSpaces = Math.round(numSpaces);
} else {
numSpaces = Math.ceil(numSpaces);
}
}
// The spacing will have changed in cases 1, 2, and 3 so the factor cannot be computed
// until this point
const decimalPlaces = Math.max(
_decimalPlaces(spacing),
_decimalPlaces(niceMin)
);
factor = Math.pow(10, isNullOrUndef(precision) ? decimalPlaces : precision);
niceMin = Math.round(niceMin * factor) / factor;
niceMax = Math.round(niceMax * factor) / factor;
let j = 0;
if (minDefined) {
if (includeBounds && niceMin !== min) {
ticks.push({value: min});
if (niceMin < min) {
j++; // Skip niceMin
}
// If the next nice tick is close to min, skip it
if (almostEquals(Math.round((niceMin + j * spacing) * factor) / factor, min, relativeLabelSize(min, minSpacing, generationOptions))) {
j++;
}
} else if (niceMin < min) {
j++;
}
}
for (; j < numSpaces; ++j) {
const tickValue = Math.round((niceMin + j * spacing) * factor) / factor;
if (maxDefined && tickValue > max) {
break;
}
ticks.push({value: tickValue});
}
if (maxDefined && includeBounds && niceMax !== max) {
// If the previous tick is too close to max, replace it with max, else add max
if (ticks.length && almostEquals(ticks[ticks.length - 1].value, max, relativeLabelSize(max, minSpacing, generationOptions))) {
ticks[ticks.length - 1].value = max;
} else {
ticks.push({value: max});
}
} else if (!maxDefined || niceMax === max) {
ticks.push({value: niceMax});
}
return ticks;
}
function relativeLabelSize(value, minSpacing, {horizontal, minRotation}) {
const rad = toRadians(minRotation);
const ratio = (horizontal ? Math.sin(rad) : Math.cos(rad)) || 0.001;
const length = 0.75 * minSpacing * ('' + value).length;
return Math.min(minSpacing / ratio, length);
}
export default class LinearScaleBase extends Scale {
constructor(cfg) {
super(cfg);
/** @type {number} */
this.start = undefined;
/** @type {number} */
this.end = undefined;
/** @type {number} */
this._startValue = undefined;
/** @type {number} */
this._endValue = undefined;
this._valueRange = 0;
}
parse(raw, index) { // eslint-disable-line no-unused-vars
if (isNullOrUndef(raw)) {
return null;
}
if ((typeof raw === 'number' || raw instanceof Number) && !isFinite(+raw)) {
return null;
}
return +raw;
}
handleTickRangeOptions() {
const {beginAtZero} = this.options;
const {minDefined, maxDefined} = this.getUserBounds();
let {min, max} = this;
const setMin = v => (min = minDefined ? min : v);
const setMax = v => (max = maxDefined ? max : v);
if (beginAtZero) {
const minSign = sign(min);
const maxSign = sign(max);
if (minSign < 0 && maxSign < 0) {
setMax(0);
} else if (minSign > 0 && maxSign > 0) {
setMin(0);
}
}
if (min === max) {
let offset = max === 0 ? 1 : Math.abs(max * 0.05);
setMax(max + offset);
if (!beginAtZero) {
setMin(min - offset);
}
}
this.min = min;
this.max = max;
}
getTickLimit() {
const tickOpts = this.options.ticks;
// eslint-disable-next-line prefer-const
let {maxTicksLimit, stepSize} = tickOpts;
let maxTicks;
if (stepSize) {
maxTicks = Math.ceil(this.max / stepSize) - Math.floor(this.min / stepSize) + 1;
if (maxTicks > 1000) {
console.warn(`scales.${this.id}.ticks.stepSize: ${stepSize} would result generating up to ${maxTicks} ticks. Limiting to 1000.`);
maxTicks = 1000;
}
} else {
maxTicks = this.computeTickLimit();
maxTicksLimit = maxTicksLimit || 11;
}
if (maxTicksLimit) {
maxTicks = Math.min(maxTicksLimit, maxTicks);
}
return maxTicks;
}
/**
* @protected
*/
computeTickLimit() {
return Number.POSITIVE_INFINITY;
}
buildTicks() {
const opts = this.options;
const tickOpts = opts.ticks;
// Figure out what the max number of ticks we can support it is based on the size of
// the axis area. For now, we say that the minimum tick spacing in pixels must be 40
// We also limit the maximum number of ticks to 11 which gives a nice 10 squares on
// the graph. Make sure we always have at least 2 ticks
let maxTicks = this.getTickLimit();
maxTicks = Math.max(2, maxTicks);
const numericGeneratorOptions = {
maxTicks,
bounds: opts.bounds,
min: opts.min,
max: opts.max,
precision: tickOpts.precision,
step: tickOpts.stepSize,
count: tickOpts.count,
maxDigits: this._maxDigits(),
horizontal: this.isHorizontal(),
minRotation: tickOpts.minRotation || 0,
includeBounds: tickOpts.includeBounds !== false
};
const dataRange = this._range || this;
const ticks = generateTicks(numericGeneratorOptions, dataRange);
// At this point, we need to update our max and min given the tick values,
// since we probably have expanded the range of the scale
if (opts.bounds === 'ticks') {
_setMinAndMaxByKey(ticks, this, 'value');
}
if (opts.reverse) {
ticks.reverse();
this.start = this.max;
this.end = this.min;
} else {
this.start = this.min;
this.end = this.max;
}
return ticks;
}
/**
* @protected
*/
configure() {
const ticks = this.ticks;
let start = this.min;
let end = this.max;
super.configure();
if (this.options.offset && ticks.length) {
const offset = (end - start) / Math.max(ticks.length - 1, 1) / 2;
start -= offset;
end += offset;
}
this._startValue = start;
this._endValue = end;
this._valueRange = end - start;
}
getLabelForValue(value) {
return formatNumber(value, this.chart.options.locale, this.options.ticks.format);
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/scales/scale.linear.js | src/scales/scale.linear.js | import {isFinite} from '../helpers/helpers.core.js';
import LinearScaleBase from './scale.linearbase.js';
import Ticks from '../core/core.ticks.js';
import {toRadians} from '../helpers/index.js';
export default class LinearScale extends LinearScaleBase {
static id = 'linear';
/**
* @type {any}
*/
static defaults = {
ticks: {
callback: Ticks.formatters.numeric
}
};
determineDataLimits() {
const {min, max} = this.getMinMax(true);
this.min = isFinite(min) ? min : 0;
this.max = isFinite(max) ? max : 1;
// Common base implementation to handle min, max, beginAtZero
this.handleTickRangeOptions();
}
/**
* Returns the maximum number of ticks based on the scale dimension
* @protected
*/
computeTickLimit() {
const horizontal = this.isHorizontal();
const length = horizontal ? this.width : this.height;
const minRotation = toRadians(this.options.ticks.minRotation);
const ratio = (horizontal ? Math.sin(minRotation) : Math.cos(minRotation)) || 0.001;
const tickFont = this._resolveTickFontOptions(0);
return Math.ceil(length / Math.min(40, tickFont.lineHeight / ratio));
}
// Utils
getPixelForValue(value) {
return value === null ? NaN : this.getPixelForDecimal((value - this._startValue) / this._valueRange);
}
getValueForPixel(pixel) {
return this._startValue + this.getDecimalForPixel(pixel) * this._valueRange;
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/helpers/helpers.segment.js | src/helpers/helpers.segment.js | import {_angleBetween, _angleDiff, _isBetween, _normalizeAngle} from './helpers.math.js';
import {createContext} from './helpers.options.js';
import {isPatternOrGradient} from './helpers.color.js';
/**
* @typedef { import('../elements/element.line.js').default } LineElement
* @typedef { import('../elements/element.point.js').default } PointElement
* @typedef {{start: number, end: number, loop: boolean, style?: any}} Segment
*/
function propertyFn(property) {
if (property === 'angle') {
return {
between: _angleBetween,
compare: _angleDiff,
normalize: _normalizeAngle,
};
}
return {
between: _isBetween,
compare: (a, b) => a - b,
normalize: x => x
};
}
function normalizeSegment({start, end, count, loop, style}) {
return {
start: start % count,
end: end % count,
loop: loop && (end - start + 1) % count === 0,
style
};
}
function getSegment(segment, points, bounds) {
const {property, start: startBound, end: endBound} = bounds;
const {between, normalize} = propertyFn(property);
const count = points.length;
// eslint-disable-next-line prefer-const
let {start, end, loop} = segment;
let i, ilen;
if (loop) {
start += count;
end += count;
for (i = 0, ilen = count; i < ilen; ++i) {
if (!between(normalize(points[start % count][property]), startBound, endBound)) {
break;
}
start--;
end--;
}
start %= count;
end %= count;
}
if (end < start) {
end += count;
}
return {start, end, loop, style: segment.style};
}
/**
* Returns the sub-segment(s) of a line segment that fall in the given bounds
* @param {object} segment
* @param {number} segment.start - start index of the segment, referring the points array
* @param {number} segment.end - end index of the segment, referring the points array
* @param {boolean} segment.loop - indicates that the segment is a loop
* @param {object} [segment.style] - segment style
* @param {PointElement[]} points - the points that this segment refers to
* @param {object} [bounds]
* @param {string} bounds.property - the property of a `PointElement` we are bounding. `x`, `y` or `angle`.
* @param {number} bounds.start - start value of the property
* @param {number} bounds.end - end value of the property
* @private
**/
export function _boundSegment(segment, points, bounds) {
if (!bounds) {
return [segment];
}
const {property, start: startBound, end: endBound} = bounds;
const count = points.length;
const {compare, between, normalize} = propertyFn(property);
const {start, end, loop, style} = getSegment(segment, points, bounds);
const result = [];
let inside = false;
let subStart = null;
let value, point, prevValue;
const startIsBefore = () => between(startBound, prevValue, value) && compare(startBound, prevValue) !== 0;
const endIsBefore = () => compare(endBound, value) === 0 || between(endBound, prevValue, value);
const shouldStart = () => inside || startIsBefore();
const shouldStop = () => !inside || endIsBefore();
for (let i = start, prev = start; i <= end; ++i) {
point = points[i % count];
if (point.skip) {
continue;
}
value = normalize(point[property]);
if (value === prevValue) {
continue;
}
inside = between(value, startBound, endBound);
if (subStart === null && shouldStart()) {
subStart = compare(value, startBound) === 0 ? i : prev;
}
if (subStart !== null && shouldStop()) {
result.push(normalizeSegment({start: subStart, end: i, loop, count, style}));
subStart = null;
}
prev = i;
prevValue = value;
}
if (subStart !== null) {
result.push(normalizeSegment({start: subStart, end, loop, count, style}));
}
return result;
}
/**
* Returns the segments of the line that are inside given bounds
* @param {LineElement} line
* @param {object} [bounds]
* @param {string} bounds.property - the property we are bounding with. `x`, `y` or `angle`.
* @param {number} bounds.start - start value of the `property`
* @param {number} bounds.end - end value of the `property`
* @private
*/
export function _boundSegments(line, bounds) {
const result = [];
const segments = line.segments;
for (let i = 0; i < segments.length; i++) {
const sub = _boundSegment(segments[i], line.points, bounds);
if (sub.length) {
result.push(...sub);
}
}
return result;
}
/**
* Find start and end index of a line.
*/
function findStartAndEnd(points, count, loop, spanGaps) {
let start = 0;
let end = count - 1;
if (loop && !spanGaps) {
// loop and not spanning gaps, first find a gap to start from
while (start < count && !points[start].skip) {
start++;
}
}
// find first non skipped point (after the first gap possibly)
while (start < count && points[start].skip) {
start++;
}
// if we looped to count, start needs to be 0
start %= count;
if (loop) {
// loop will go past count, if start > 0
end += start;
}
while (end > start && points[end % count].skip) {
end--;
}
// end could be more than count, normalize
end %= count;
return {start, end};
}
/**
* Compute solid segments from Points, when spanGaps === false
* @param {PointElement[]} points - the points
* @param {number} start - start index
* @param {number} max - max index (can go past count on a loop)
* @param {boolean} loop - boolean indicating that this would be a loop if no gaps are found
*/
function solidSegments(points, start, max, loop) {
const count = points.length;
const result = [];
let last = start;
let prev = points[start];
let end;
for (end = start + 1; end <= max; ++end) {
const cur = points[end % count];
if (cur.skip || cur.stop) {
if (!prev.skip) {
loop = false;
result.push({start: start % count, end: (end - 1) % count, loop});
// @ts-ignore
start = last = cur.stop ? end : null;
}
} else {
last = end;
if (prev.skip) {
start = end;
}
}
prev = cur;
}
if (last !== null) {
result.push({start: start % count, end: last % count, loop});
}
return result;
}
/**
* Compute the continuous segments that define the whole line
* There can be skipped points within a segment, if spanGaps is true.
* @param {LineElement} line
* @param {object} [segmentOptions]
* @return {Segment[]}
* @private
*/
export function _computeSegments(line, segmentOptions) {
const points = line.points;
const spanGaps = line.options.spanGaps;
const count = points.length;
if (!count) {
return [];
}
const loop = !!line._loop;
const {start, end} = findStartAndEnd(points, count, loop, spanGaps);
if (spanGaps === true) {
return splitByStyles(line, [{start, end, loop}], points, segmentOptions);
}
const max = end < start ? end + count : end;
const completeLoop = !!line._fullLoop && start === 0 && end === count - 1;
return splitByStyles(line, solidSegments(points, start, max, completeLoop), points, segmentOptions);
}
/**
* @param {Segment[]} segments
* @param {PointElement[]} points
* @param {object} [segmentOptions]
* @return {Segment[]}
*/
function splitByStyles(line, segments, points, segmentOptions) {
if (!segmentOptions || !segmentOptions.setContext || !points) {
return segments;
}
return doSplitByStyles(line, segments, points, segmentOptions);
}
/**
* @param {LineElement} line
* @param {Segment[]} segments
* @param {PointElement[]} points
* @param {object} [segmentOptions]
* @return {Segment[]}
*/
function doSplitByStyles(line, segments, points, segmentOptions) {
const chartContext = line._chart.getContext();
const baseStyle = readStyle(line.options);
const {_datasetIndex: datasetIndex, options: {spanGaps}} = line;
const count = points.length;
const result = [];
let prevStyle = baseStyle;
let start = segments[0].start;
let i = start;
function addStyle(s, e, l, st) {
const dir = spanGaps ? -1 : 1;
if (s === e) {
return;
}
// Style can not start/end on a skipped point, adjust indices accordingly
s += count;
while (points[s % count].skip) {
s -= dir;
}
while (points[e % count].skip) {
e += dir;
}
if (s % count !== e % count) {
result.push({start: s % count, end: e % count, loop: l, style: st});
prevStyle = st;
start = e % count;
}
}
for (const segment of segments) {
start = spanGaps ? start : segment.start;
let prev = points[start % count];
let style;
for (i = start + 1; i <= segment.end; i++) {
const pt = points[i % count];
style = readStyle(segmentOptions.setContext(createContext(chartContext, {
type: 'segment',
p0: prev,
p1: pt,
p0DataIndex: (i - 1) % count,
p1DataIndex: i % count,
datasetIndex
})));
if (styleChanged(style, prevStyle)) {
addStyle(start, i - 1, segment.loop, prevStyle);
}
prev = pt;
prevStyle = style;
}
if (start < i - 1) {
addStyle(start, i - 1, segment.loop, prevStyle);
}
}
return result;
}
function readStyle(options) {
return {
backgroundColor: options.backgroundColor,
borderCapStyle: options.borderCapStyle,
borderDash: options.borderDash,
borderDashOffset: options.borderDashOffset,
borderJoinStyle: options.borderJoinStyle,
borderWidth: options.borderWidth,
borderColor: options.borderColor
};
}
function styleChanged(style, prevStyle) {
if (!prevStyle) {
return false;
}
const cache = [];
const replacer = function(key, value) {
if (!isPatternOrGradient(value)) {
return value;
}
if (!cache.includes(value)) {
cache.push(value);
}
return cache.indexOf(value);
};
return JSON.stringify(style, replacer) !== JSON.stringify(prevStyle, replacer);
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/controllers/controller.bubble.js | src/controllers/controller.bubble.js | import DatasetController from '../core/core.datasetController.js';
import {valueOrDefault} from '../helpers/helpers.core.js';
export default class BubbleController extends DatasetController {
static id = 'bubble';
/**
* @type {any}
*/
static defaults = {
datasetElementType: false,
dataElementType: 'point',
animations: {
numbers: {
type: 'number',
properties: ['x', 'y', 'borderWidth', 'radius']
}
}
};
/**
* @type {any}
*/
static overrides = {
scales: {
x: {
type: 'linear'
},
y: {
type: 'linear'
}
}
};
initialize() {
this.enableOptionSharing = true;
super.initialize();
}
/**
* Parse array of primitive values
* @protected
*/
parsePrimitiveData(meta, data, start, count) {
const parsed = super.parsePrimitiveData(meta, data, start, count);
for (let i = 0; i < parsed.length; i++) {
parsed[i]._custom = this.resolveDataElementOptions(i + start).radius;
}
return parsed;
}
/**
* Parse array of arrays
* @protected
*/
parseArrayData(meta, data, start, count) {
const parsed = super.parseArrayData(meta, data, start, count);
for (let i = 0; i < parsed.length; i++) {
const item = data[start + i];
parsed[i]._custom = valueOrDefault(item[2], this.resolveDataElementOptions(i + start).radius);
}
return parsed;
}
/**
* Parse array of objects
* @protected
*/
parseObjectData(meta, data, start, count) {
const parsed = super.parseObjectData(meta, data, start, count);
for (let i = 0; i < parsed.length; i++) {
const item = data[start + i];
parsed[i]._custom = valueOrDefault(item && item.r && +item.r, this.resolveDataElementOptions(i + start).radius);
}
return parsed;
}
/**
* @protected
*/
getMaxOverflow() {
const data = this._cachedMeta.data;
let max = 0;
for (let i = data.length - 1; i >= 0; --i) {
max = Math.max(max, data[i].size(this.resolveDataElementOptions(i)) / 2);
}
return max > 0 && max;
}
/**
* @protected
*/
getLabelAndValue(index) {
const meta = this._cachedMeta;
const labels = this.chart.data.labels || [];
const {xScale, yScale} = meta;
const parsed = this.getParsed(index);
const x = xScale.getLabelForValue(parsed.x);
const y = yScale.getLabelForValue(parsed.y);
const r = parsed._custom;
return {
label: labels[index] || '',
value: '(' + x + ', ' + y + (r ? ', ' + r : '') + ')'
};
}
update(mode) {
const points = this._cachedMeta.data;
// Update Points
this.updateElements(points, 0, points.length, mode);
}
updateElements(points, start, count, mode) {
const reset = mode === 'reset';
const {iScale, vScale} = this._cachedMeta;
const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);
const iAxis = iScale.axis;
const vAxis = vScale.axis;
for (let i = start; i < start + count; i++) {
const point = points[i];
const parsed = !reset && this.getParsed(i);
const properties = {};
const iPixel = properties[iAxis] = reset ? iScale.getPixelForDecimal(0.5) : iScale.getPixelForValue(parsed[iAxis]);
const vPixel = properties[vAxis] = reset ? vScale.getBasePixel() : vScale.getPixelForValue(parsed[vAxis]);
properties.skip = isNaN(iPixel) || isNaN(vPixel);
if (includeOptions) {
properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);
if (reset) {
properties.options.radius = 0;
}
}
this.updateElement(point, i, properties, mode);
}
}
/**
* @param {number} index
* @param {string} [mode]
* @protected
*/
resolveDataElementOptions(index, mode) {
const parsed = this.getParsed(index);
let values = super.resolveDataElementOptions(index, mode);
// In case values were cached (and thus frozen), we need to clone the values
if (values.$shared) {
values = Object.assign({}, values, {$shared: false});
}
// Custom radius resolution
const radius = values.radius;
if (mode !== 'active') {
values.radius = 0;
}
values.radius += valueOrDefault(parsed && parsed._custom, radius);
return values;
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/controllers/controller.radar.js | src/controllers/controller.radar.js | import DatasetController from '../core/core.datasetController.js';
import {_parseObjectDataRadialScale} from '../helpers/index.js';
export default class RadarController extends DatasetController {
static id = 'radar';
/**
* @type {any}
*/
static defaults = {
datasetElementType: 'line',
dataElementType: 'point',
indexAxis: 'r',
showLine: true,
elements: {
line: {
fill: 'start'
}
},
};
/**
* @type {any}
*/
static overrides = {
aspectRatio: 1,
scales: {
r: {
type: 'radialLinear',
}
}
};
/**
* @protected
*/
getLabelAndValue(index) {
const vScale = this._cachedMeta.vScale;
const parsed = this.getParsed(index);
return {
label: vScale.getLabels()[index],
value: '' + vScale.getLabelForValue(parsed[vScale.axis])
};
}
parseObjectData(meta, data, start, count) {
return _parseObjectDataRadialScale.bind(this)(meta, data, start, count);
}
update(mode) {
const meta = this._cachedMeta;
const line = meta.dataset;
const points = meta.data || [];
const labels = meta.iScale.getLabels();
// Update Line
line.points = points;
// In resize mode only point locations change, so no need to set the points or options.
if (mode !== 'resize') {
const options = this.resolveDatasetElementOptions(mode);
if (!this.options.showLine) {
options.borderWidth = 0;
}
const properties = {
_loop: true,
_fullLoop: labels.length === points.length,
options
};
this.updateElement(line, undefined, properties, mode);
}
// Update Points
this.updateElements(points, 0, points.length, mode);
}
updateElements(points, start, count, mode) {
const scale = this._cachedMeta.rScale;
const reset = mode === 'reset';
for (let i = start; i < start + count; i++) {
const point = points[i];
const options = this.resolveDataElementOptions(i, point.active ? 'active' : mode);
const pointPosition = scale.getPointPositionForValue(i, this.getParsed(i).r);
const x = reset ? scale.xCenter : pointPosition.x;
const y = reset ? scale.yCenter : pointPosition.y;
const properties = {
x,
y,
angle: pointPosition.angle,
skip: isNaN(x) || isNaN(y),
options
};
this.updateElement(point, i, properties, mode);
}
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/controllers/controller.doughnut.js | src/controllers/controller.doughnut.js | import DatasetController from '../core/core.datasetController.js';
import {isObject, resolveObjectKey, toPercentage, toDimension, valueOrDefault} from '../helpers/helpers.core.js';
import {formatNumber} from '../helpers/helpers.intl.js';
import {toRadians, PI, TAU, HALF_PI, _angleBetween} from '../helpers/helpers.math.js';
/**
* @typedef { import('../core/core.controller.js').default } Chart
*/
function getRatioAndOffset(rotation, circumference, cutout) {
let ratioX = 1;
let ratioY = 1;
let offsetX = 0;
let offsetY = 0;
// If the chart's circumference isn't a full circle, calculate size as a ratio of the width/height of the arc
if (circumference < TAU) {
const startAngle = rotation;
const endAngle = startAngle + circumference;
const startX = Math.cos(startAngle);
const startY = Math.sin(startAngle);
const endX = Math.cos(endAngle);
const endY = Math.sin(endAngle);
const calcMax = (angle, a, b) => _angleBetween(angle, startAngle, endAngle, true) ? 1 : Math.max(a, a * cutout, b, b * cutout);
const calcMin = (angle, a, b) => _angleBetween(angle, startAngle, endAngle, true) ? -1 : Math.min(a, a * cutout, b, b * cutout);
const maxX = calcMax(0, startX, endX);
const maxY = calcMax(HALF_PI, startY, endY);
const minX = calcMin(PI, startX, endX);
const minY = calcMin(PI + HALF_PI, startY, endY);
ratioX = (maxX - minX) / 2;
ratioY = (maxY - minY) / 2;
offsetX = -(maxX + minX) / 2;
offsetY = -(maxY + minY) / 2;
}
return {ratioX, ratioY, offsetX, offsetY};
}
export default class DoughnutController extends DatasetController {
static id = 'doughnut';
/**
* @type {any}
*/
static defaults = {
datasetElementType: false,
dataElementType: 'arc',
animation: {
// Boolean - Whether we animate the rotation of the Doughnut
animateRotate: true,
// Boolean - Whether we animate scaling the Doughnut from the centre
animateScale: false
},
animations: {
numbers: {
type: 'number',
properties: ['circumference', 'endAngle', 'innerRadius', 'outerRadius', 'startAngle', 'x', 'y', 'offset', 'borderWidth', 'spacing']
},
},
// The percentage of the chart that we cut out of the middle.
cutout: '50%',
// The rotation of the chart, where the first data arc begins.
rotation: 0,
// The total circumference of the chart.
circumference: 360,
// The outer radius of the chart
radius: '100%',
// Spacing between arcs
spacing: 0,
indexAxis: 'r',
};
static descriptors = {
_scriptable: (name) => name !== 'spacing',
_indexable: (name) => name !== 'spacing' && !name.startsWith('borderDash') && !name.startsWith('hoverBorderDash'),
};
/**
* @type {any}
*/
static overrides = {
aspectRatio: 1,
// Need to override these to give a nice default
plugins: {
legend: {
labels: {
generateLabels(chart) {
const data = chart.data;
const {labels: {pointStyle, textAlign, color, useBorderRadius, borderRadius}} = chart.legend.options;
if (data.labels.length && data.datasets.length) {
return data.labels.map((label, i) => {
const meta = chart.getDatasetMeta(0);
const style = meta.controller.getStyle(i);
return {
text: label,
fillStyle: style.backgroundColor,
fontColor: color,
hidden: !chart.getDataVisibility(i),
lineDash: style.borderDash,
lineDashOffset: style.borderDashOffset,
lineJoin: style.borderJoinStyle,
lineWidth: style.borderWidth,
strokeStyle: style.borderColor,
textAlign: textAlign,
pointStyle: pointStyle,
borderRadius: useBorderRadius && (borderRadius || style.borderRadius),
// Extra data used for toggling the correct item
index: i
};
});
}
return [];
}
},
onClick(e, legendItem, legend) {
legend.chart.toggleDataVisibility(legendItem.index);
legend.chart.update();
}
}
}
};
constructor(chart, datasetIndex) {
super(chart, datasetIndex);
this.enableOptionSharing = true;
this.innerRadius = undefined;
this.outerRadius = undefined;
this.offsetX = undefined;
this.offsetY = undefined;
}
linkScales() {}
/**
* Override data parsing, since we are not using scales
*/
parse(start, count) {
const data = this.getDataset().data;
const meta = this._cachedMeta;
if (this._parsing === false) {
meta._parsed = data;
} else {
let getter = (i) => +data[i];
if (isObject(data[start])) {
const {key = 'value'} = this._parsing;
getter = (i) => +resolveObjectKey(data[i], key);
}
let i, ilen;
for (i = start, ilen = start + count; i < ilen; ++i) {
meta._parsed[i] = getter(i);
}
}
}
/**
* @private
*/
_getRotation() {
return toRadians(this.options.rotation - 90);
}
/**
* @private
*/
_getCircumference() {
return toRadians(this.options.circumference);
}
/**
* Get the maximal rotation & circumference extents
* across all visible datasets.
*/
_getRotationExtents() {
let min = TAU;
let max = -TAU;
for (let i = 0; i < this.chart.data.datasets.length; ++i) {
if (this.chart.isDatasetVisible(i) && this.chart.getDatasetMeta(i).type === this._type) {
const controller = this.chart.getDatasetMeta(i).controller;
const rotation = controller._getRotation();
const circumference = controller._getCircumference();
min = Math.min(min, rotation);
max = Math.max(max, rotation + circumference);
}
}
return {
rotation: min,
circumference: max - min,
};
}
/**
* @param {string} mode
*/
update(mode) {
const chart = this.chart;
const {chartArea} = chart;
const meta = this._cachedMeta;
const arcs = meta.data;
const spacing = this.getMaxBorderWidth() + this.getMaxOffset(arcs) + this.options.spacing;
const maxSize = Math.max((Math.min(chartArea.width, chartArea.height) - spacing) / 2, 0);
const cutout = Math.min(toPercentage(this.options.cutout, maxSize), 1);
const chartWeight = this._getRingWeight(this.index);
// Compute the maximal rotation & circumference limits.
// If we only consider our dataset, this can cause problems when two datasets
// are both less than a circle with different rotations (starting angles)
const {circumference, rotation} = this._getRotationExtents();
const {ratioX, ratioY, offsetX, offsetY} = getRatioAndOffset(rotation, circumference, cutout);
const maxWidth = (chartArea.width - spacing) / ratioX;
const maxHeight = (chartArea.height - spacing) / ratioY;
const maxRadius = Math.max(Math.min(maxWidth, maxHeight) / 2, 0);
const outerRadius = toDimension(this.options.radius, maxRadius);
const innerRadius = Math.max(outerRadius * cutout, 0);
const radiusLength = (outerRadius - innerRadius) / this._getVisibleDatasetWeightTotal();
this.offsetX = offsetX * outerRadius;
this.offsetY = offsetY * outerRadius;
meta.total = this.calculateTotal();
this.outerRadius = outerRadius - radiusLength * this._getRingWeightOffset(this.index);
this.innerRadius = Math.max(this.outerRadius - radiusLength * chartWeight, 0);
this.updateElements(arcs, 0, arcs.length, mode);
}
/**
* @private
*/
_circumference(i, reset) {
const opts = this.options;
const meta = this._cachedMeta;
const circumference = this._getCircumference();
if ((reset && opts.animation.animateRotate) || !this.chart.getDataVisibility(i) || meta._parsed[i] === null || meta.data[i].hidden) {
return 0;
}
return this.calculateCircumference(meta._parsed[i] * circumference / TAU);
}
updateElements(arcs, start, count, mode) {
const reset = mode === 'reset';
const chart = this.chart;
const chartArea = chart.chartArea;
const opts = chart.options;
const animationOpts = opts.animation;
const centerX = (chartArea.left + chartArea.right) / 2;
const centerY = (chartArea.top + chartArea.bottom) / 2;
const animateScale = reset && animationOpts.animateScale;
const innerRadius = animateScale ? 0 : this.innerRadius;
const outerRadius = animateScale ? 0 : this.outerRadius;
const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);
let startAngle = this._getRotation();
let i;
for (i = 0; i < start; ++i) {
startAngle += this._circumference(i, reset);
}
for (i = start; i < start + count; ++i) {
const circumference = this._circumference(i, reset);
const arc = arcs[i];
const properties = {
x: centerX + this.offsetX,
y: centerY + this.offsetY,
startAngle,
endAngle: startAngle + circumference,
circumference,
outerRadius,
innerRadius
};
if (includeOptions) {
properties.options = sharedOptions || this.resolveDataElementOptions(i, arc.active ? 'active' : mode);
}
startAngle += circumference;
this.updateElement(arc, i, properties, mode);
}
}
calculateTotal() {
const meta = this._cachedMeta;
const metaData = meta.data;
let total = 0;
let i;
for (i = 0; i < metaData.length; i++) {
const value = meta._parsed[i];
if (value !== null && !isNaN(value) && this.chart.getDataVisibility(i) && !metaData[i].hidden) {
total += Math.abs(value);
}
}
return total;
}
calculateCircumference(value) {
const total = this._cachedMeta.total;
if (total > 0 && !isNaN(value)) {
return TAU * (Math.abs(value) / total);
}
return 0;
}
getLabelAndValue(index) {
const meta = this._cachedMeta;
const chart = this.chart;
const labels = chart.data.labels || [];
const value = formatNumber(meta._parsed[index], chart.options.locale);
return {
label: labels[index] || '',
value,
};
}
getMaxBorderWidth(arcs) {
let max = 0;
const chart = this.chart;
let i, ilen, meta, controller, options;
if (!arcs) {
// Find the outmost visible dataset
for (i = 0, ilen = chart.data.datasets.length; i < ilen; ++i) {
if (chart.isDatasetVisible(i)) {
meta = chart.getDatasetMeta(i);
arcs = meta.data;
controller = meta.controller;
break;
}
}
}
if (!arcs) {
return 0;
}
for (i = 0, ilen = arcs.length; i < ilen; ++i) {
options = controller.resolveDataElementOptions(i);
if (options.borderAlign !== 'inner') {
max = Math.max(max, options.borderWidth || 0, options.hoverBorderWidth || 0);
}
}
return max;
}
getMaxOffset(arcs) {
let max = 0;
for (let i = 0, ilen = arcs.length; i < ilen; ++i) {
const options = this.resolveDataElementOptions(i);
max = Math.max(max, options.offset || 0, options.hoverOffset || 0);
}
return max;
}
/**
* Get radius length offset of the dataset in relation to the visible datasets weights. This allows determining the inner and outer radius correctly
* @private
*/
_getRingWeightOffset(datasetIndex) {
let ringWeightOffset = 0;
for (let i = 0; i < datasetIndex; ++i) {
if (this.chart.isDatasetVisible(i)) {
ringWeightOffset += this._getRingWeight(i);
}
}
return ringWeightOffset;
}
/**
* @private
*/
_getRingWeight(datasetIndex) {
return Math.max(valueOrDefault(this.chart.data.datasets[datasetIndex].weight, 1), 0);
}
/**
* Returns the sum of all visible data set weights.
* @private
*/
_getVisibleDatasetWeightTotal() {
return this._getRingWeightOffset(this.chart.data.datasets.length) || 1;
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/controllers/controller.polarArea.js | src/controllers/controller.polarArea.js | import DatasetController from '../core/core.datasetController.js';
import {toRadians, PI, formatNumber, _parseObjectDataRadialScale} from '../helpers/index.js';
export default class PolarAreaController extends DatasetController {
static id = 'polarArea';
/**
* @type {any}
*/
static defaults = {
dataElementType: 'arc',
animation: {
animateRotate: true,
animateScale: true
},
animations: {
numbers: {
type: 'number',
properties: ['x', 'y', 'startAngle', 'endAngle', 'innerRadius', 'outerRadius']
},
},
indexAxis: 'r',
startAngle: 0,
};
/**
* @type {any}
*/
static overrides = {
aspectRatio: 1,
plugins: {
legend: {
labels: {
generateLabels(chart) {
const data = chart.data;
if (data.labels.length && data.datasets.length) {
const {labels: {pointStyle, color}} = chart.legend.options;
return data.labels.map((label, i) => {
const meta = chart.getDatasetMeta(0);
const style = meta.controller.getStyle(i);
return {
text: label,
fillStyle: style.backgroundColor,
strokeStyle: style.borderColor,
fontColor: color,
lineWidth: style.borderWidth,
pointStyle: pointStyle,
hidden: !chart.getDataVisibility(i),
// Extra data used for toggling the correct item
index: i
};
});
}
return [];
}
},
onClick(e, legendItem, legend) {
legend.chart.toggleDataVisibility(legendItem.index);
legend.chart.update();
}
}
},
scales: {
r: {
type: 'radialLinear',
angleLines: {
display: false
},
beginAtZero: true,
grid: {
circular: true
},
pointLabels: {
display: false
},
startAngle: 0
}
}
};
constructor(chart, datasetIndex) {
super(chart, datasetIndex);
this.innerRadius = undefined;
this.outerRadius = undefined;
}
getLabelAndValue(index) {
const meta = this._cachedMeta;
const chart = this.chart;
const labels = chart.data.labels || [];
const value = formatNumber(meta._parsed[index].r, chart.options.locale);
return {
label: labels[index] || '',
value,
};
}
parseObjectData(meta, data, start, count) {
return _parseObjectDataRadialScale.bind(this)(meta, data, start, count);
}
update(mode) {
const arcs = this._cachedMeta.data;
this._updateRadius();
this.updateElements(arcs, 0, arcs.length, mode);
}
/**
* @protected
*/
getMinMax() {
const meta = this._cachedMeta;
const range = {min: Number.POSITIVE_INFINITY, max: Number.NEGATIVE_INFINITY};
meta.data.forEach((element, index) => {
const parsed = this.getParsed(index).r;
if (!isNaN(parsed) && this.chart.getDataVisibility(index)) {
if (parsed < range.min) {
range.min = parsed;
}
if (parsed > range.max) {
range.max = parsed;
}
}
});
return range;
}
/**
* @private
*/
_updateRadius() {
const chart = this.chart;
const chartArea = chart.chartArea;
const opts = chart.options;
const minSize = Math.min(chartArea.right - chartArea.left, chartArea.bottom - chartArea.top);
const outerRadius = Math.max(minSize / 2, 0);
const innerRadius = Math.max(opts.cutoutPercentage ? (outerRadius / 100) * (opts.cutoutPercentage) : 1, 0);
const radiusLength = (outerRadius - innerRadius) / chart.getVisibleDatasetCount();
this.outerRadius = outerRadius - (radiusLength * this.index);
this.innerRadius = this.outerRadius - radiusLength;
}
updateElements(arcs, start, count, mode) {
const reset = mode === 'reset';
const chart = this.chart;
const opts = chart.options;
const animationOpts = opts.animation;
const scale = this._cachedMeta.rScale;
const centerX = scale.xCenter;
const centerY = scale.yCenter;
const datasetStartAngle = scale.getIndexAngle(0) - 0.5 * PI;
let angle = datasetStartAngle;
let i;
const defaultAngle = 360 / this.countVisibleElements();
for (i = 0; i < start; ++i) {
angle += this._computeAngle(i, mode, defaultAngle);
}
for (i = start; i < start + count; i++) {
const arc = arcs[i];
let startAngle = angle;
let endAngle = angle + this._computeAngle(i, mode, defaultAngle);
let outerRadius = chart.getDataVisibility(i) ? scale.getDistanceFromCenterForValue(this.getParsed(i).r) : 0;
angle = endAngle;
if (reset) {
if (animationOpts.animateScale) {
outerRadius = 0;
}
if (animationOpts.animateRotate) {
startAngle = endAngle = datasetStartAngle;
}
}
const properties = {
x: centerX,
y: centerY,
innerRadius: 0,
outerRadius,
startAngle,
endAngle,
options: this.resolveDataElementOptions(i, arc.active ? 'active' : mode)
};
this.updateElement(arc, i, properties, mode);
}
}
countVisibleElements() {
const meta = this._cachedMeta;
let count = 0;
meta.data.forEach((element, index) => {
if (!isNaN(this.getParsed(index).r) && this.chart.getDataVisibility(index)) {
count++;
}
});
return count;
}
/**
* @private
*/
_computeAngle(index, mode, defaultAngle) {
return this.chart.getDataVisibility(index)
? toRadians(this.resolveDataElementOptions(index, mode).angle || defaultAngle)
: 0;
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/controllers/index.js | src/controllers/index.js | export {default as BarController} from './controller.bar.js';
export {default as BubbleController} from './controller.bubble.js';
export {default as DoughnutController} from './controller.doughnut.js';
export {default as LineController} from './controller.line.js';
export {default as PolarAreaController} from './controller.polarArea.js';
export {default as PieController} from './controller.pie.js';
export {default as RadarController} from './controller.radar.js';
export {default as ScatterController} from './controller.scatter.js';
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/controllers/controller.line.js | src/controllers/controller.line.js | import DatasetController from '../core/core.datasetController.js';
import {isNullOrUndef} from '../helpers/index.js';
import {isNumber} from '../helpers/helpers.math.js';
import {_getStartAndCountOfVisiblePoints, _scaleRangesChanged} from '../helpers/helpers.extras.js';
export default class LineController extends DatasetController {
static id = 'line';
/**
* @type {any}
*/
static defaults = {
datasetElementType: 'line',
dataElementType: 'point',
showLine: true,
spanGaps: false,
};
/**
* @type {any}
*/
static overrides = {
scales: {
_index_: {
type: 'category',
},
_value_: {
type: 'linear',
},
}
};
initialize() {
this.enableOptionSharing = true;
this.supportsDecimation = true;
super.initialize();
}
update(mode) {
const meta = this._cachedMeta;
const {dataset: line, data: points = [], _dataset} = meta;
// @ts-ignore
const animationsDisabled = this.chart._animationsDisabled;
let {start, count} = _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled);
this._drawStart = start;
this._drawCount = count;
if (_scaleRangesChanged(meta)) {
start = 0;
count = points.length;
}
// Update Line
line._chart = this.chart;
line._datasetIndex = this.index;
line._decimated = !!_dataset._decimated;
line.points = points;
const options = this.resolveDatasetElementOptions(mode);
if (!this.options.showLine) {
options.borderWidth = 0;
}
options.segment = this.options.segment;
this.updateElement(line, undefined, {
animated: !animationsDisabled,
options
}, mode);
// Update Points
this.updateElements(points, start, count, mode);
}
updateElements(points, start, count, mode) {
const reset = mode === 'reset';
const {iScale, vScale, _stacked, _dataset} = this._cachedMeta;
const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);
const iAxis = iScale.axis;
const vAxis = vScale.axis;
const {spanGaps, segment} = this.options;
const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;
const directUpdate = this.chart._animationsDisabled || reset || mode === 'none';
const end = start + count;
const pointsCount = points.length;
let prevParsed = start > 0 && this.getParsed(start - 1);
for (let i = 0; i < pointsCount; ++i) {
const point = points[i];
const properties = directUpdate ? point : {};
if (i < start || i >= end) {
properties.skip = true;
continue;
}
const parsed = this.getParsed(i);
const nullData = isNullOrUndef(parsed[vAxis]);
const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);
const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? this.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);
properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;
properties.stop = i > 0 && (Math.abs(parsed[iAxis] - prevParsed[iAxis])) > maxGapLength;
if (segment) {
properties.parsed = parsed;
properties.raw = _dataset.data[i];
}
if (includeOptions) {
properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);
}
if (!directUpdate) {
this.updateElement(point, i, properties, mode);
}
prevParsed = parsed;
}
}
/**
* @protected
*/
getMaxOverflow() {
const meta = this._cachedMeta;
const dataset = meta.dataset;
const border = dataset.options && dataset.options.borderWidth || 0;
const data = meta.data || [];
if (!data.length) {
return border;
}
const firstPoint = data[0].size(this.resolveDataElementOptions(0));
const lastPoint = data[data.length - 1].size(this.resolveDataElementOptions(data.length - 1));
return Math.max(border, firstPoint, lastPoint) / 2;
}
draw() {
const meta = this._cachedMeta;
meta.dataset.updateControlPoints(this.chart.chartArea, meta.iScale.axis);
super.draw();
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/controllers/controller.scatter.js | src/controllers/controller.scatter.js | import DatasetController from '../core/core.datasetController.js';
import {isNullOrUndef} from '../helpers/index.js';
import {isNumber} from '../helpers/helpers.math.js';
import {_getStartAndCountOfVisiblePoints, _scaleRangesChanged} from '../helpers/helpers.extras.js';
export default class ScatterController extends DatasetController {
static id = 'scatter';
/**
* @type {any}
*/
static defaults = {
datasetElementType: false,
dataElementType: 'point',
showLine: false,
fill: false
};
/**
* @type {any}
*/
static overrides = {
interaction: {
mode: 'point'
},
scales: {
x: {
type: 'linear'
},
y: {
type: 'linear'
}
}
};
/**
* @protected
*/
getLabelAndValue(index) {
const meta = this._cachedMeta;
const labels = this.chart.data.labels || [];
const {xScale, yScale} = meta;
const parsed = this.getParsed(index);
const x = xScale.getLabelForValue(parsed.x);
const y = yScale.getLabelForValue(parsed.y);
return {
label: labels[index] || '',
value: '(' + x + ', ' + y + ')'
};
}
update(mode) {
const meta = this._cachedMeta;
const {data: points = []} = meta;
// @ts-ignore
const animationsDisabled = this.chart._animationsDisabled;
let {start, count} = _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled);
this._drawStart = start;
this._drawCount = count;
if (_scaleRangesChanged(meta)) {
start = 0;
count = points.length;
}
if (this.options.showLine) {
// https://github.com/chartjs/Chart.js/issues/11333
if (!this.datasetElementType) {
this.addElements();
}
const {dataset: line, _dataset} = meta;
// Update Line
line._chart = this.chart;
line._datasetIndex = this.index;
line._decimated = !!_dataset._decimated;
line.points = points;
const options = this.resolveDatasetElementOptions(mode);
options.segment = this.options.segment;
this.updateElement(line, undefined, {
animated: !animationsDisabled,
options
}, mode);
} else if (this.datasetElementType) {
// https://github.com/chartjs/Chart.js/issues/11333
delete meta.dataset;
this.datasetElementType = false;
}
// Update Points
this.updateElements(points, start, count, mode);
}
addElements() {
const {showLine} = this.options;
if (!this.datasetElementType && showLine) {
this.datasetElementType = this.chart.registry.getElement('line');
}
super.addElements();
}
updateElements(points, start, count, mode) {
const reset = mode === 'reset';
const {iScale, vScale, _stacked, _dataset} = this._cachedMeta;
const firstOpts = this.resolveDataElementOptions(start, mode);
const sharedOptions = this.getSharedOptions(firstOpts);
const includeOptions = this.includeOptions(mode, sharedOptions);
const iAxis = iScale.axis;
const vAxis = vScale.axis;
const {spanGaps, segment} = this.options;
const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;
const directUpdate = this.chart._animationsDisabled || reset || mode === 'none';
let prevParsed = start > 0 && this.getParsed(start - 1);
for (let i = start; i < start + count; ++i) {
const point = points[i];
const parsed = this.getParsed(i);
const properties = directUpdate ? point : {};
const nullData = isNullOrUndef(parsed[vAxis]);
const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);
const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? this.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);
properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;
properties.stop = i > 0 && (Math.abs(parsed[iAxis] - prevParsed[iAxis])) > maxGapLength;
if (segment) {
properties.parsed = parsed;
properties.raw = _dataset.data[i];
}
if (includeOptions) {
properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);
}
if (!directUpdate) {
this.updateElement(point, i, properties, mode);
}
prevParsed = parsed;
}
this.updateSharedOptions(sharedOptions, mode, firstOpts);
}
/**
* @protected
*/
getMaxOverflow() {
const meta = this._cachedMeta;
const data = meta.data || [];
if (!this.options.showLine) {
let max = 0;
for (let i = data.length - 1; i >= 0; --i) {
max = Math.max(max, data[i].size(this.resolveDataElementOptions(i)) / 2);
}
return max > 0 && max;
}
const dataset = meta.dataset;
const border = dataset.options && dataset.options.borderWidth || 0;
if (!data.length) {
return border;
}
const firstPoint = data[0].size(this.resolveDataElementOptions(0));
const lastPoint = data[data.length - 1].size(this.resolveDataElementOptions(data.length - 1));
return Math.max(border, firstPoint, lastPoint) / 2;
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/controllers/controller.bar.js | src/controllers/controller.bar.js | import DatasetController from '../core/core.datasetController.js';
import {
_arrayUnique, isArray, isNullOrUndef,
valueOrDefault, resolveObjectKey, sign, defined
} from '../helpers/index.js';
function getAllScaleValues(scale, type) {
if (!scale._cache.$bar) {
const visibleMetas = scale.getMatchingVisibleMetas(type);
let values = [];
for (let i = 0, ilen = visibleMetas.length; i < ilen; i++) {
values = values.concat(visibleMetas[i].controller.getAllParsedValues(scale));
}
scale._cache.$bar = _arrayUnique(values.sort((a, b) => a - b));
}
return scale._cache.$bar;
}
/**
* Computes the "optimal" sample size to maintain bars equally sized while preventing overlap.
* @private
*/
function computeMinSampleSize(meta) {
const scale = meta.iScale;
const values = getAllScaleValues(scale, meta.type);
let min = scale._length;
let i, ilen, curr, prev;
const updateMinAndPrev = () => {
if (curr === 32767 || curr === -32768) {
// Ignore truncated pixels
return;
}
if (defined(prev)) {
// curr - prev === 0 is ignored
min = Math.min(min, Math.abs(curr - prev) || min);
}
prev = curr;
};
for (i = 0, ilen = values.length; i < ilen; ++i) {
curr = scale.getPixelForValue(values[i]);
updateMinAndPrev();
}
prev = undefined;
for (i = 0, ilen = scale.ticks.length; i < ilen; ++i) {
curr = scale.getPixelForTick(i);
updateMinAndPrev();
}
return min;
}
/**
* Computes an "ideal" category based on the absolute bar thickness or, if undefined or null,
* uses the smallest interval (see computeMinSampleSize) that prevents bar overlapping. This
* mode currently always generates bars equally sized (until we introduce scriptable options?).
* @private
*/
function computeFitCategoryTraits(index, ruler, options, stackCount) {
const thickness = options.barThickness;
let size, ratio;
if (isNullOrUndef(thickness)) {
size = ruler.min * options.categoryPercentage;
ratio = options.barPercentage;
} else {
// When bar thickness is enforced, category and bar percentages are ignored.
// Note(SB): we could add support for relative bar thickness (e.g. barThickness: '50%')
// and deprecate barPercentage since this value is ignored when thickness is absolute.
size = thickness * stackCount;
ratio = 1;
}
return {
chunk: size / stackCount,
ratio,
start: ruler.pixels[index] - (size / 2)
};
}
/**
* Computes an "optimal" category that globally arranges bars side by side (no gap when
* percentage options are 1), based on the previous and following categories. This mode
* generates bars with different widths when data are not evenly spaced.
* @private
*/
function computeFlexCategoryTraits(index, ruler, options, stackCount) {
const pixels = ruler.pixels;
const curr = pixels[index];
let prev = index > 0 ? pixels[index - 1] : null;
let next = index < pixels.length - 1 ? pixels[index + 1] : null;
const percent = options.categoryPercentage;
if (prev === null) {
// first data: its size is double based on the next point or,
// if it's also the last data, we use the scale size.
prev = curr - (next === null ? ruler.end - ruler.start : next - curr);
}
if (next === null) {
// last data: its size is also double based on the previous point.
next = curr + curr - prev;
}
const start = curr - (curr - Math.min(prev, next)) / 2 * percent;
const size = Math.abs(next - prev) / 2 * percent;
return {
chunk: size / stackCount,
ratio: options.barPercentage,
start
};
}
function parseFloatBar(entry, item, vScale, i) {
const startValue = vScale.parse(entry[0], i);
const endValue = vScale.parse(entry[1], i);
const min = Math.min(startValue, endValue);
const max = Math.max(startValue, endValue);
let barStart = min;
let barEnd = max;
if (Math.abs(min) > Math.abs(max)) {
barStart = max;
barEnd = min;
}
// Store `barEnd` (furthest away from origin) as parsed value,
// to make stacking straight forward
item[vScale.axis] = barEnd;
item._custom = {
barStart,
barEnd,
start: startValue,
end: endValue,
min,
max
};
}
function parseValue(entry, item, vScale, i) {
if (isArray(entry)) {
parseFloatBar(entry, item, vScale, i);
} else {
item[vScale.axis] = vScale.parse(entry, i);
}
return item;
}
function parseArrayOrPrimitive(meta, data, start, count) {
const iScale = meta.iScale;
const vScale = meta.vScale;
const labels = iScale.getLabels();
const singleScale = iScale === vScale;
const parsed = [];
let i, ilen, item, entry;
for (i = start, ilen = start + count; i < ilen; ++i) {
entry = data[i];
item = {};
item[iScale.axis] = singleScale || iScale.parse(labels[i], i);
parsed.push(parseValue(entry, item, vScale, i));
}
return parsed;
}
function isFloatBar(custom) {
return custom && custom.barStart !== undefined && custom.barEnd !== undefined;
}
function barSign(size, vScale, actualBase) {
if (size !== 0) {
return sign(size);
}
return (vScale.isHorizontal() ? 1 : -1) * (vScale.min >= actualBase ? 1 : -1);
}
function borderProps(properties) {
let reverse, start, end, top, bottom;
if (properties.horizontal) {
reverse = properties.base > properties.x;
start = 'left';
end = 'right';
} else {
reverse = properties.base < properties.y;
start = 'bottom';
end = 'top';
}
if (reverse) {
top = 'end';
bottom = 'start';
} else {
top = 'start';
bottom = 'end';
}
return {start, end, reverse, top, bottom};
}
function setBorderSkipped(properties, options, stack, index) {
let edge = options.borderSkipped;
const res = {};
if (!edge) {
properties.borderSkipped = res;
return;
}
if (edge === true) {
properties.borderSkipped = {top: true, right: true, bottom: true, left: true};
return;
}
const {start, end, reverse, top, bottom} = borderProps(properties);
if (edge === 'middle' && stack) {
properties.enableBorderRadius = true;
if ((stack._top || 0) === index) {
edge = top;
} else if ((stack._bottom || 0) === index) {
edge = bottom;
} else {
res[parseEdge(bottom, start, end, reverse)] = true;
edge = top;
}
}
res[parseEdge(edge, start, end, reverse)] = true;
properties.borderSkipped = res;
}
function parseEdge(edge, a, b, reverse) {
if (reverse) {
edge = swap(edge, a, b);
edge = startEnd(edge, b, a);
} else {
edge = startEnd(edge, a, b);
}
return edge;
}
function swap(orig, v1, v2) {
return orig === v1 ? v2 : orig === v2 ? v1 : orig;
}
function startEnd(v, start, end) {
return v === 'start' ? start : v === 'end' ? end : v;
}
function setInflateAmount(properties, {inflateAmount}, ratio) {
properties.inflateAmount = inflateAmount === 'auto'
? ratio === 1 ? 0.33 : 0
: inflateAmount;
}
export default class BarController extends DatasetController {
static id = 'bar';
/**
* @type {any}
*/
static defaults = {
datasetElementType: false,
dataElementType: 'bar',
categoryPercentage: 0.8,
barPercentage: 0.9,
grouped: true,
animations: {
numbers: {
type: 'number',
properties: ['x', 'y', 'base', 'width', 'height']
}
}
};
/**
* @type {any}
*/
static overrides = {
scales: {
_index_: {
type: 'category',
offset: true,
grid: {
offset: true
}
},
_value_: {
type: 'linear',
beginAtZero: true,
}
}
};
/**
* Overriding primitive data parsing since we support mixed primitive/array
* data for float bars
* @protected
*/
parsePrimitiveData(meta, data, start, count) {
return parseArrayOrPrimitive(meta, data, start, count);
}
/**
* Overriding array data parsing since we support mixed primitive/array
* data for float bars
* @protected
*/
parseArrayData(meta, data, start, count) {
return parseArrayOrPrimitive(meta, data, start, count);
}
/**
* Overriding object data parsing since we support mixed primitive/array
* value-scale data for float bars
* @protected
*/
parseObjectData(meta, data, start, count) {
const {iScale, vScale} = meta;
const {xAxisKey = 'x', yAxisKey = 'y'} = this._parsing;
const iAxisKey = iScale.axis === 'x' ? xAxisKey : yAxisKey;
const vAxisKey = vScale.axis === 'x' ? xAxisKey : yAxisKey;
const parsed = [];
let i, ilen, item, obj;
for (i = start, ilen = start + count; i < ilen; ++i) {
obj = data[i];
item = {};
item[iScale.axis] = iScale.parse(resolveObjectKey(obj, iAxisKey), i);
parsed.push(parseValue(resolveObjectKey(obj, vAxisKey), item, vScale, i));
}
return parsed;
}
/**
* @protected
*/
updateRangeFromParsed(range, scale, parsed, stack) {
super.updateRangeFromParsed(range, scale, parsed, stack);
const custom = parsed._custom;
if (custom && scale === this._cachedMeta.vScale) {
// float bar: only one end of the bar is considered by `super`
range.min = Math.min(range.min, custom.min);
range.max = Math.max(range.max, custom.max);
}
}
/**
* @return {number|boolean}
* @protected
*/
getMaxOverflow() {
return 0;
}
/**
* @protected
*/
getLabelAndValue(index) {
const meta = this._cachedMeta;
const {iScale, vScale} = meta;
const parsed = this.getParsed(index);
const custom = parsed._custom;
const value = isFloatBar(custom)
? '[' + custom.start + ', ' + custom.end + ']'
: '' + vScale.getLabelForValue(parsed[vScale.axis]);
return {
label: '' + iScale.getLabelForValue(parsed[iScale.axis]),
value
};
}
initialize() {
this.enableOptionSharing = true;
super.initialize();
const meta = this._cachedMeta;
meta.stack = this.getDataset().stack;
}
update(mode) {
const meta = this._cachedMeta;
this.updateElements(meta.data, 0, meta.data.length, mode);
}
updateElements(bars, start, count, mode) {
const reset = mode === 'reset';
const {index, _cachedMeta: {vScale}} = this;
const base = vScale.getBasePixel();
const horizontal = vScale.isHorizontal();
const ruler = this._getRuler();
const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);
for (let i = start; i < start + count; i++) {
const parsed = this.getParsed(i);
const vpixels = reset || isNullOrUndef(parsed[vScale.axis]) ? {base, head: base} : this._calculateBarValuePixels(i);
const ipixels = this._calculateBarIndexPixels(i, ruler);
const stack = (parsed._stacks || {})[vScale.axis];
const properties = {
horizontal,
base: vpixels.base,
enableBorderRadius: !stack || isFloatBar(parsed._custom) || (index === stack._top || index === stack._bottom),
x: horizontal ? vpixels.head : ipixels.center,
y: horizontal ? ipixels.center : vpixels.head,
height: horizontal ? ipixels.size : Math.abs(vpixels.size),
width: horizontal ? Math.abs(vpixels.size) : ipixels.size
};
if (includeOptions) {
properties.options = sharedOptions || this.resolveDataElementOptions(i, bars[i].active ? 'active' : mode);
}
const options = properties.options || bars[i].options;
setBorderSkipped(properties, options, stack, index);
setInflateAmount(properties, options, ruler.ratio);
this.updateElement(bars[i], i, properties, mode);
}
}
/**
* Returns the stacks based on groups and bar visibility.
* @param {number} [last] - The dataset index
* @param {number} [dataIndex] - The data index of the ruler
* @returns {string[]} The list of stack IDs
* @private
*/
_getStacks(last, dataIndex) {
const {iScale} = this._cachedMeta;
const metasets = iScale.getMatchingVisibleMetas(this._type)
.filter(meta => meta.controller.options.grouped);
const stacked = iScale.options.stacked;
const stacks = [];
const currentParsed = this._cachedMeta.controller.getParsed(dataIndex);
const iScaleValue = currentParsed && currentParsed[iScale.axis];
const skipNull = (meta) => {
const parsed = meta._parsed.find(item => item[iScale.axis] === iScaleValue);
const val = parsed && parsed[meta.vScale.axis];
if (isNullOrUndef(val) || isNaN(val)) {
return true;
}
};
for (const meta of metasets) {
if (dataIndex !== undefined && skipNull(meta)) {
continue;
}
// stacked | meta.stack
// | found | not found | undefined
// false | x | x | x
// true | | x |
// undefined | | x | x
if (stacked === false || stacks.indexOf(meta.stack) === -1 ||
(stacked === undefined && meta.stack === undefined)) {
stacks.push(meta.stack);
}
if (meta.index === last) {
break;
}
}
// No stacks? that means there is no visible data. Let's still initialize an `undefined`
// stack where possible invisible bars will be located.
// https://github.com/chartjs/Chart.js/issues/6368
if (!stacks.length) {
stacks.push(undefined);
}
return stacks;
}
/**
* Returns the effective number of stacks based on groups and bar visibility.
* @private
*/
_getStackCount(index) {
return this._getStacks(undefined, index).length;
}
_getAxisCount() {
return this._getAxis().length;
}
getFirstScaleIdForIndexAxis() {
const scales = this.chart.scales;
const indexScaleId = this.chart.options.indexAxis;
return Object.keys(scales).filter(key => scales[key].axis === indexScaleId).shift();
}
_getAxis() {
const axis = {};
const firstScaleAxisId = this.getFirstScaleIdForIndexAxis();
for (const dataset of this.chart.data.datasets) {
axis[valueOrDefault(
this.chart.options.indexAxis === 'x' ? dataset.xAxisID : dataset.yAxisID, firstScaleAxisId
)] = true;
}
return Object.keys(axis);
}
/**
* Returns the stack index for the given dataset based on groups and bar visibility.
* @param {number} [datasetIndex] - The dataset index
* @param {string} [name] - The stack name to find
* @param {number} [dataIndex]
* @returns {number} The stack index
* @private
*/
_getStackIndex(datasetIndex, name, dataIndex) {
const stacks = this._getStacks(datasetIndex, dataIndex);
const index = (name !== undefined)
? stacks.indexOf(name)
: -1; // indexOf returns -1 if element is not present
return (index === -1)
? stacks.length - 1
: index;
}
/**
* @private
*/
_getRuler() {
const opts = this.options;
const meta = this._cachedMeta;
const iScale = meta.iScale;
const pixels = [];
let i, ilen;
for (i = 0, ilen = meta.data.length; i < ilen; ++i) {
pixels.push(iScale.getPixelForValue(this.getParsed(i)[iScale.axis], i));
}
const barThickness = opts.barThickness;
const min = barThickness || computeMinSampleSize(meta);
return {
min,
pixels,
start: iScale._startPixel,
end: iScale._endPixel,
stackCount: this._getStackCount(),
scale: iScale,
grouped: opts.grouped,
// bar thickness ratio used for non-grouped bars
ratio: barThickness ? 1 : opts.categoryPercentage * opts.barPercentage
};
}
/**
* Note: pixel values are not clamped to the scale area.
* @private
*/
_calculateBarValuePixels(index) {
const {_cachedMeta: {vScale, _stacked, index: datasetIndex}, options: {base: baseValue, minBarLength}} = this;
const actualBase = baseValue || 0;
const parsed = this.getParsed(index);
const custom = parsed._custom;
const floating = isFloatBar(custom);
let value = parsed[vScale.axis];
let start = 0;
let length = _stacked ? this.applyStack(vScale, parsed, _stacked) : value;
let head, size;
if (length !== value) {
start = length - value;
length = value;
}
if (floating) {
value = custom.barStart;
length = custom.barEnd - custom.barStart;
// bars crossing origin are not stacked
if (value !== 0 && sign(value) !== sign(custom.barEnd)) {
start = 0;
}
start += value;
}
const startValue = !isNullOrUndef(baseValue) && !floating ? baseValue : start;
let base = vScale.getPixelForValue(startValue);
if (this.chart.getDataVisibility(index)) {
head = vScale.getPixelForValue(start + length);
} else {
// When not visible, no height
head = base;
}
size = head - base;
if (Math.abs(size) < minBarLength) {
size = barSign(size, vScale, actualBase) * minBarLength;
if (value === actualBase) {
base -= size / 2;
}
const startPixel = vScale.getPixelForDecimal(0);
const endPixel = vScale.getPixelForDecimal(1);
const min = Math.min(startPixel, endPixel);
const max = Math.max(startPixel, endPixel);
base = Math.max(Math.min(base, max), min);
head = base + size;
if (_stacked && !floating) {
// visual data coordinates after applying minBarLength
parsed._stacks[vScale.axis]._visualValues[datasetIndex] = vScale.getValueForPixel(head) - vScale.getValueForPixel(base);
}
}
if (base === vScale.getPixelForValue(actualBase)) {
const halfGrid = sign(size) * vScale.getLineWidthForValue(actualBase) / 2;
base += halfGrid;
size -= halfGrid;
}
return {
size,
base,
head,
center: head + size / 2
};
}
/**
* @private
*/
_calculateBarIndexPixels(index, ruler) {
const scale = ruler.scale;
const options = this.options;
const skipNull = options.skipNull;
const maxBarThickness = valueOrDefault(options.maxBarThickness, Infinity);
let center, size;
const axisCount = this._getAxisCount();
if (ruler.grouped) {
const stackCount = skipNull ? this._getStackCount(index) : ruler.stackCount;
const range = options.barThickness === 'flex'
? computeFlexCategoryTraits(index, ruler, options, stackCount * axisCount)
: computeFitCategoryTraits(index, ruler, options, stackCount * axisCount);
const axisID = this.chart.options.indexAxis === 'x' ? this.getDataset().xAxisID : this.getDataset().yAxisID;
const axisNumber = this._getAxis().indexOf(valueOrDefault(axisID, this.getFirstScaleIdForIndexAxis()));
const stackIndex = this._getStackIndex(this.index, this._cachedMeta.stack, skipNull ? index : undefined) + axisNumber;
center = range.start + (range.chunk * stackIndex) + (range.chunk / 2);
size = Math.min(maxBarThickness, range.chunk * range.ratio);
} else {
// For non-grouped bar charts, exact pixel values are used
center = scale.getPixelForValue(this.getParsed(index)[scale.axis], index);
size = Math.min(maxBarThickness, ruler.min * ruler.ratio);
}
return {
base: center - size / 2,
head: center + size / 2,
center,
size
};
}
draw() {
const meta = this._cachedMeta;
const vScale = meta.vScale;
const rects = meta.data;
const ilen = rects.length;
let i = 0;
for (; i < ilen; ++i) {
if (this.getParsed(i)[vScale.axis] !== null && !rects[i].hidden) {
rects[i].draw(this._ctx);
}
}
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/controllers/controller.pie.js | src/controllers/controller.pie.js | import DoughnutController from './controller.doughnut.js';
// Pie charts are Doughnut chart with different defaults
export default class PieController extends DoughnutController {
static id = 'pie';
/**
* @type {any}
*/
static defaults = {
// The percentage of the chart that we cut out of the middle.
cutout: 0,
// The rotation of the chart, where the first data arc begins.
rotation: 0,
// The total circumference of the chart.
circumference: 360,
// The outer radius of the chart
radius: '100%'
};
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/elements/element.bar.js | src/elements/element.bar.js | import Element from '../core/core.element.js';
import {isObject, _isBetween, _limitValue} from '../helpers/index.js';
import {addRoundedRectPath} from '../helpers/helpers.canvas.js';
import {toTRBL, toTRBLCorners} from '../helpers/helpers.options.js';
/** @typedef {{ x: number, y: number, base: number, horizontal: boolean, width: number, height: number }} BarProps */
/**
* Helper function to get the bounds of the bar regardless of the orientation
* @param {BarElement} bar the bar
* @param {boolean} [useFinalPosition]
* @return {object} bounds of the bar
* @private
*/
function getBarBounds(bar, useFinalPosition) {
const {x, y, base, width, height} = /** @type {BarProps} */ (bar.getProps(['x', 'y', 'base', 'width', 'height'], useFinalPosition));
let left, right, top, bottom, half;
if (bar.horizontal) {
half = height / 2;
left = Math.min(x, base);
right = Math.max(x, base);
top = y - half;
bottom = y + half;
} else {
half = width / 2;
left = x - half;
right = x + half;
top = Math.min(y, base);
bottom = Math.max(y, base);
}
return {left, top, right, bottom};
}
function skipOrLimit(skip, value, min, max) {
return skip ? 0 : _limitValue(value, min, max);
}
function parseBorderWidth(bar, maxW, maxH) {
const value = bar.options.borderWidth;
const skip = bar.borderSkipped;
const o = toTRBL(value);
return {
t: skipOrLimit(skip.top, o.top, 0, maxH),
r: skipOrLimit(skip.right, o.right, 0, maxW),
b: skipOrLimit(skip.bottom, o.bottom, 0, maxH),
l: skipOrLimit(skip.left, o.left, 0, maxW)
};
}
function parseBorderRadius(bar, maxW, maxH) {
const {enableBorderRadius} = bar.getProps(['enableBorderRadius']);
const value = bar.options.borderRadius;
const o = toTRBLCorners(value);
const maxR = Math.min(maxW, maxH);
const skip = bar.borderSkipped;
// If the value is an object, assume the user knows what they are doing
// and apply as directed.
const enableBorder = enableBorderRadius || isObject(value);
return {
topLeft: skipOrLimit(!enableBorder || skip.top || skip.left, o.topLeft, 0, maxR),
topRight: skipOrLimit(!enableBorder || skip.top || skip.right, o.topRight, 0, maxR),
bottomLeft: skipOrLimit(!enableBorder || skip.bottom || skip.left, o.bottomLeft, 0, maxR),
bottomRight: skipOrLimit(!enableBorder || skip.bottom || skip.right, o.bottomRight, 0, maxR)
};
}
function boundingRects(bar) {
const bounds = getBarBounds(bar);
const width = bounds.right - bounds.left;
const height = bounds.bottom - bounds.top;
const border = parseBorderWidth(bar, width / 2, height / 2);
const radius = parseBorderRadius(bar, width / 2, height / 2);
return {
outer: {
x: bounds.left,
y: bounds.top,
w: width,
h: height,
radius
},
inner: {
x: bounds.left + border.l,
y: bounds.top + border.t,
w: width - border.l - border.r,
h: height - border.t - border.b,
radius: {
topLeft: Math.max(0, radius.topLeft - Math.max(border.t, border.l)),
topRight: Math.max(0, radius.topRight - Math.max(border.t, border.r)),
bottomLeft: Math.max(0, radius.bottomLeft - Math.max(border.b, border.l)),
bottomRight: Math.max(0, radius.bottomRight - Math.max(border.b, border.r)),
}
}
};
}
function inRange(bar, x, y, useFinalPosition) {
const skipX = x === null;
const skipY = y === null;
const skipBoth = skipX && skipY;
const bounds = bar && !skipBoth && getBarBounds(bar, useFinalPosition);
return bounds
&& (skipX || _isBetween(x, bounds.left, bounds.right))
&& (skipY || _isBetween(y, bounds.top, bounds.bottom));
}
function hasRadius(radius) {
return radius.topLeft || radius.topRight || radius.bottomLeft || radius.bottomRight;
}
/**
* Add a path of a rectangle to the current sub-path
* @param {CanvasRenderingContext2D} ctx Context
* @param {*} rect Bounding rect
*/
function addNormalRectPath(ctx, rect) {
ctx.rect(rect.x, rect.y, rect.w, rect.h);
}
function inflateRect(rect, amount, refRect = {}) {
const x = rect.x !== refRect.x ? -amount : 0;
const y = rect.y !== refRect.y ? -amount : 0;
const w = (rect.x + rect.w !== refRect.x + refRect.w ? amount : 0) - x;
const h = (rect.y + rect.h !== refRect.y + refRect.h ? amount : 0) - y;
return {
x: rect.x + x,
y: rect.y + y,
w: rect.w + w,
h: rect.h + h,
radius: rect.radius
};
}
export default class BarElement extends Element {
static id = 'bar';
/**
* @type {any}
*/
static defaults = {
borderSkipped: 'start',
borderWidth: 0,
borderRadius: 0,
inflateAmount: 'auto',
pointStyle: undefined
};
/**
* @type {any}
*/
static defaultRoutes = {
backgroundColor: 'backgroundColor',
borderColor: 'borderColor'
};
constructor(cfg) {
super();
this.options = undefined;
this.horizontal = undefined;
this.base = undefined;
this.width = undefined;
this.height = undefined;
this.inflateAmount = undefined;
if (cfg) {
Object.assign(this, cfg);
}
}
draw(ctx) {
const {inflateAmount, options: {borderColor, backgroundColor}} = this;
const {inner, outer} = boundingRects(this);
const addRectPath = hasRadius(outer.radius) ? addRoundedRectPath : addNormalRectPath;
ctx.save();
if (outer.w !== inner.w || outer.h !== inner.h) {
ctx.beginPath();
addRectPath(ctx, inflateRect(outer, inflateAmount, inner));
ctx.clip();
addRectPath(ctx, inflateRect(inner, -inflateAmount, outer));
ctx.fillStyle = borderColor;
ctx.fill('evenodd');
}
ctx.beginPath();
addRectPath(ctx, inflateRect(inner, inflateAmount));
ctx.fillStyle = backgroundColor;
ctx.fill();
ctx.restore();
}
inRange(mouseX, mouseY, useFinalPosition) {
return inRange(this, mouseX, mouseY, useFinalPosition);
}
inXRange(mouseX, useFinalPosition) {
return inRange(this, mouseX, null, useFinalPosition);
}
inYRange(mouseY, useFinalPosition) {
return inRange(this, null, mouseY, useFinalPosition);
}
getCenterPoint(useFinalPosition) {
const {x, y, base, horizontal} = /** @type {BarProps} */ (this.getProps(['x', 'y', 'base', 'horizontal'], useFinalPosition));
return {
x: horizontal ? (x + base) / 2 : x,
y: horizontal ? y : (y + base) / 2
};
}
getRange(axis) {
return axis === 'x' ? this.width / 2 : this.height / 2;
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/elements/index.js | src/elements/index.js | export {default as ArcElement} from './element.arc.js';
export {default as LineElement} from './element.line.js';
export {default as PointElement} from './element.point.js';
export {default as BarElement} from './element.bar.js';
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/elements/element.line.js | src/elements/element.line.js | import Element from '../core/core.element.js';
import {_bezierInterpolation, _pointInLine, _steppedInterpolation} from '../helpers/helpers.interpolation.js';
import {_computeSegments, _boundSegments} from '../helpers/helpers.segment.js';
import {_steppedLineTo, _bezierCurveTo} from '../helpers/helpers.canvas.js';
import {_updateBezierControlPoints} from '../helpers/helpers.curve.js';
import {valueOrDefault} from '../helpers/index.js';
/**
* @typedef { import('./element.point.js').default } PointElement
*/
function setStyle(ctx, options, style = options) {
ctx.lineCap = valueOrDefault(style.borderCapStyle, options.borderCapStyle);
ctx.setLineDash(valueOrDefault(style.borderDash, options.borderDash));
ctx.lineDashOffset = valueOrDefault(style.borderDashOffset, options.borderDashOffset);
ctx.lineJoin = valueOrDefault(style.borderJoinStyle, options.borderJoinStyle);
ctx.lineWidth = valueOrDefault(style.borderWidth, options.borderWidth);
ctx.strokeStyle = valueOrDefault(style.borderColor, options.borderColor);
}
function lineTo(ctx, previous, target) {
ctx.lineTo(target.x, target.y);
}
/**
* @returns {any}
*/
function getLineMethod(options) {
if (options.stepped) {
return _steppedLineTo;
}
if (options.tension || options.cubicInterpolationMode === 'monotone') {
return _bezierCurveTo;
}
return lineTo;
}
function pathVars(points, segment, params = {}) {
const count = points.length;
const {start: paramsStart = 0, end: paramsEnd = count - 1} = params;
const {start: segmentStart, end: segmentEnd} = segment;
const start = Math.max(paramsStart, segmentStart);
const end = Math.min(paramsEnd, segmentEnd);
const outside = paramsStart < segmentStart && paramsEnd < segmentStart || paramsStart > segmentEnd && paramsEnd > segmentEnd;
return {
count,
start,
loop: segment.loop,
ilen: end < start && !outside ? count + end - start : end - start
};
}
/**
* Create path from points, grouping by truncated x-coordinate
* Points need to be in order by x-coordinate for this to work efficiently
* @param {CanvasRenderingContext2D|Path2D} ctx - Context
* @param {LineElement} line
* @param {object} segment
* @param {number} segment.start - start index of the segment, referring the points array
* @param {number} segment.end - end index of the segment, referring the points array
* @param {boolean} segment.loop - indicates that the segment is a loop
* @param {object} params
* @param {boolean} params.move - move to starting point (vs line to it)
* @param {boolean} params.reverse - path the segment from end to start
* @param {number} params.start - limit segment to points starting from `start` index
* @param {number} params.end - limit segment to points ending at `start` + `count` index
*/
function pathSegment(ctx, line, segment, params) {
const {points, options} = line;
const {count, start, loop, ilen} = pathVars(points, segment, params);
const lineMethod = getLineMethod(options);
// eslint-disable-next-line prefer-const
let {move = true, reverse} = params || {};
let i, point, prev;
for (i = 0; i <= ilen; ++i) {
point = points[(start + (reverse ? ilen - i : i)) % count];
if (point.skip) {
// If there is a skipped point inside a segment, spanGaps must be true
continue;
} else if (move) {
ctx.moveTo(point.x, point.y);
move = false;
} else {
lineMethod(ctx, prev, point, reverse, options.stepped);
}
prev = point;
}
if (loop) {
point = points[(start + (reverse ? ilen : 0)) % count];
lineMethod(ctx, prev, point, reverse, options.stepped);
}
return !!loop;
}
/**
* Create path from points, grouping by truncated x-coordinate
* Points need to be in order by x-coordinate for this to work efficiently
* @param {CanvasRenderingContext2D|Path2D} ctx - Context
* @param {LineElement} line
* @param {object} segment
* @param {number} segment.start - start index of the segment, referring the points array
* @param {number} segment.end - end index of the segment, referring the points array
* @param {boolean} segment.loop - indicates that the segment is a loop
* @param {object} params
* @param {boolean} params.move - move to starting point (vs line to it)
* @param {boolean} params.reverse - path the segment from end to start
* @param {number} params.start - limit segment to points starting from `start` index
* @param {number} params.end - limit segment to points ending at `start` + `count` index
*/
function fastPathSegment(ctx, line, segment, params) {
const points = line.points;
const {count, start, ilen} = pathVars(points, segment, params);
const {move = true, reverse} = params || {};
let avgX = 0;
let countX = 0;
let i, point, prevX, minY, maxY, lastY;
const pointIndex = (index) => (start + (reverse ? ilen - index : index)) % count;
const drawX = () => {
if (minY !== maxY) {
// Draw line to maxY and minY, using the average x-coordinate
ctx.lineTo(avgX, maxY);
ctx.lineTo(avgX, minY);
// Line to y-value of last point in group. So the line continues
// from correct position. Not using move, to have solid path.
ctx.lineTo(avgX, lastY);
}
};
if (move) {
point = points[pointIndex(0)];
ctx.moveTo(point.x, point.y);
}
for (i = 0; i <= ilen; ++i) {
point = points[pointIndex(i)];
if (point.skip) {
// If there is a skipped point inside a segment, spanGaps must be true
continue;
}
const x = point.x;
const y = point.y;
const truncX = x | 0; // truncated x-coordinate
if (truncX === prevX) {
// Determine `minY` / `maxY` and `avgX` while we stay within same x-position
if (y < minY) {
minY = y;
} else if (y > maxY) {
maxY = y;
}
// For first point in group, countX is `0`, so average will be `x` / 1.
avgX = (countX * avgX + x) / ++countX;
} else {
drawX();
// Draw line to next x-position, using the first (or only)
// y-value in that group
ctx.lineTo(x, y);
prevX = truncX;
countX = 0;
minY = maxY = y;
}
// Keep track of the last y-value in group
lastY = y;
}
drawX();
}
/**
* @param {LineElement} line - the line
* @returns {function}
* @private
*/
function _getSegmentMethod(line) {
const opts = line.options;
const borderDash = opts.borderDash && opts.borderDash.length;
const useFastPath = !line._decimated && !line._loop && !opts.tension && opts.cubicInterpolationMode !== 'monotone' && !opts.stepped && !borderDash;
return useFastPath ? fastPathSegment : pathSegment;
}
/**
* @private
*/
function _getInterpolationMethod(options) {
if (options.stepped) {
return _steppedInterpolation;
}
if (options.tension || options.cubicInterpolationMode === 'monotone') {
return _bezierInterpolation;
}
return _pointInLine;
}
function strokePathWithCache(ctx, line, start, count) {
let path = line._path;
if (!path) {
path = line._path = new Path2D();
if (line.path(path, start, count)) {
path.closePath();
}
}
setStyle(ctx, line.options);
ctx.stroke(path);
}
function strokePathDirect(ctx, line, start, count) {
const {segments, options} = line;
const segmentMethod = _getSegmentMethod(line);
for (const segment of segments) {
setStyle(ctx, options, segment.style);
ctx.beginPath();
if (segmentMethod(ctx, line, segment, {start, end: start + count - 1})) {
ctx.closePath();
}
ctx.stroke();
}
}
const usePath2D = typeof Path2D === 'function';
function draw(ctx, line, start, count) {
if (usePath2D && !line.options.segment) {
strokePathWithCache(ctx, line, start, count);
} else {
strokePathDirect(ctx, line, start, count);
}
}
export default class LineElement extends Element {
static id = 'line';
/**
* @type {any}
*/
static defaults = {
borderCapStyle: 'butt',
borderDash: [],
borderDashOffset: 0,
borderJoinStyle: 'miter',
borderWidth: 3,
capBezierPoints: true,
cubicInterpolationMode: 'default',
fill: false,
spanGaps: false,
stepped: false,
tension: 0,
};
/**
* @type {any}
*/
static defaultRoutes = {
backgroundColor: 'backgroundColor',
borderColor: 'borderColor'
};
static descriptors = {
_scriptable: true,
_indexable: (name) => name !== 'borderDash' && name !== 'fill',
};
constructor(cfg) {
super();
this.animated = true;
this.options = undefined;
this._chart = undefined;
this._loop = undefined;
this._fullLoop = undefined;
this._path = undefined;
this._points = undefined;
this._segments = undefined;
this._decimated = false;
this._pointsUpdated = false;
this._datasetIndex = undefined;
if (cfg) {
Object.assign(this, cfg);
}
}
updateControlPoints(chartArea, indexAxis) {
const options = this.options;
if ((options.tension || options.cubicInterpolationMode === 'monotone') && !options.stepped && !this._pointsUpdated) {
const loop = options.spanGaps ? this._loop : this._fullLoop;
_updateBezierControlPoints(this._points, options, chartArea, loop, indexAxis);
this._pointsUpdated = true;
}
}
set points(points) {
this._points = points;
delete this._segments;
delete this._path;
this._pointsUpdated = false;
}
get points() {
return this._points;
}
get segments() {
return this._segments || (this._segments = _computeSegments(this, this.options.segment));
}
/**
* First non-skipped point on this line
* @returns {PointElement|undefined}
*/
first() {
const segments = this.segments;
const points = this.points;
return segments.length && points[segments[0].start];
}
/**
* Last non-skipped point on this line
* @returns {PointElement|undefined}
*/
last() {
const segments = this.segments;
const points = this.points;
const count = segments.length;
return count && points[segments[count - 1].end];
}
/**
* Interpolate a point in this line at the same value on `property` as
* the reference `point` provided
* @param {PointElement} point - the reference point
* @param {string} property - the property to match on
* @returns {PointElement|undefined}
*/
interpolate(point, property) {
const options = this.options;
const value = point[property];
const points = this.points;
const segments = _boundSegments(this, {property, start: value, end: value});
if (!segments.length) {
return;
}
const result = [];
const _interpolate = _getInterpolationMethod(options);
let i, ilen;
for (i = 0, ilen = segments.length; i < ilen; ++i) {
const {start, end} = segments[i];
const p1 = points[start];
const p2 = points[end];
if (p1 === p2) {
result.push(p1);
continue;
}
const t = Math.abs((value - p1[property]) / (p2[property] - p1[property]));
const interpolated = _interpolate(p1, p2, t, options.stepped);
interpolated[property] = point[property];
result.push(interpolated);
}
return result.length === 1 ? result[0] : result;
}
/**
* Append a segment of this line to current path.
* @param {CanvasRenderingContext2D} ctx
* @param {object} segment
* @param {number} segment.start - start index of the segment, referring the points array
* @param {number} segment.end - end index of the segment, referring the points array
* @param {boolean} segment.loop - indicates that the segment is a loop
* @param {object} params
* @param {boolean} params.move - move to starting point (vs line to it)
* @param {boolean} params.reverse - path the segment from end to start
* @param {number} params.start - limit segment to points starting from `start` index
* @param {number} params.end - limit segment to points ending at `start` + `count` index
* @returns {undefined|boolean} - true if the segment is a full loop (path should be closed)
*/
pathSegment(ctx, segment, params) {
const segmentMethod = _getSegmentMethod(this);
return segmentMethod(ctx, this, segment, params);
}
/**
* Append all segments of this line to current path.
* @param {CanvasRenderingContext2D|Path2D} ctx
* @param {number} [start]
* @param {number} [count]
* @returns {undefined|boolean} - true if line is a full loop (path should be closed)
*/
path(ctx, start, count) {
const segments = this.segments;
const segmentMethod = _getSegmentMethod(this);
let loop = this._loop;
start = start || 0;
count = count || (this.points.length - start);
for (const segment of segments) {
loop &= segmentMethod(ctx, this, segment, {start, end: start + count - 1});
}
return !!loop;
}
/**
* Draw
* @param {CanvasRenderingContext2D} ctx
* @param {object} chartArea
* @param {number} [start]
* @param {number} [count]
*/
draw(ctx, chartArea, start, count) {
const options = this.options || {};
const points = this.points || [];
if (points.length && options.borderWidth) {
ctx.save();
draw(ctx, this, start, count);
ctx.restore();
}
if (this.animated) {
// When line is animated, the control points and path are not cached.
this._pointsUpdated = false;
this._path = undefined;
}
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.title.js | src/plugins/plugin.title.js | import Element from '../core/core.element.js';
import layouts from '../core/core.layouts.js';
import {PI, isArray, toPadding, toFont} from '../helpers/index.js';
import {_toLeftRightCenter, _alignStartEnd} from '../helpers/helpers.extras.js';
import {renderText} from '../helpers/helpers.canvas.js';
export class Title extends Element {
/**
* @param {{ ctx: any; options: any; chart: any; }} config
*/
constructor(config) {
super();
this.chart = config.chart;
this.options = config.options;
this.ctx = config.ctx;
this._padding = undefined;
this.top = undefined;
this.bottom = undefined;
this.left = undefined;
this.right = undefined;
this.width = undefined;
this.height = undefined;
this.position = undefined;
this.weight = undefined;
this.fullSize = undefined;
}
update(maxWidth, maxHeight) {
const opts = this.options;
this.left = 0;
this.top = 0;
if (!opts.display) {
this.width = this.height = this.right = this.bottom = 0;
return;
}
this.width = this.right = maxWidth;
this.height = this.bottom = maxHeight;
const lineCount = isArray(opts.text) ? opts.text.length : 1;
this._padding = toPadding(opts.padding);
const textSize = lineCount * toFont(opts.font).lineHeight + this._padding.height;
if (this.isHorizontal()) {
this.height = textSize;
} else {
this.width = textSize;
}
}
isHorizontal() {
const pos = this.options.position;
return pos === 'top' || pos === 'bottom';
}
_drawArgs(offset) {
const {top, left, bottom, right, options} = this;
const align = options.align;
let rotation = 0;
let maxWidth, titleX, titleY;
if (this.isHorizontal()) {
titleX = _alignStartEnd(align, left, right);
titleY = top + offset;
maxWidth = right - left;
} else {
if (options.position === 'left') {
titleX = left + offset;
titleY = _alignStartEnd(align, bottom, top);
rotation = PI * -0.5;
} else {
titleX = right - offset;
titleY = _alignStartEnd(align, top, bottom);
rotation = PI * 0.5;
}
maxWidth = bottom - top;
}
return {titleX, titleY, maxWidth, rotation};
}
draw() {
const ctx = this.ctx;
const opts = this.options;
if (!opts.display) {
return;
}
const fontOpts = toFont(opts.font);
const lineHeight = fontOpts.lineHeight;
const offset = lineHeight / 2 + this._padding.top;
const {titleX, titleY, maxWidth, rotation} = this._drawArgs(offset);
renderText(ctx, opts.text, 0, 0, fontOpts, {
color: opts.color,
maxWidth,
rotation,
textAlign: _toLeftRightCenter(opts.align),
textBaseline: 'middle',
translation: [titleX, titleY],
});
}
}
function createTitle(chart, titleOpts) {
const title = new Title({
ctx: chart.ctx,
options: titleOpts,
chart
});
layouts.configure(chart, title, titleOpts);
layouts.addBox(chart, title);
chart.titleBlock = title;
}
export default {
id: 'title',
/**
* For tests
* @private
*/
_element: Title,
start(chart, _args, options) {
createTitle(chart, options);
},
stop(chart) {
const titleBlock = chart.titleBlock;
layouts.removeBox(chart, titleBlock);
delete chart.titleBlock;
},
beforeUpdate(chart, _args, options) {
const title = chart.titleBlock;
layouts.configure(chart, title, options);
title.options = options;
},
defaults: {
align: 'center',
display: false,
font: {
weight: 'bold',
},
fullSize: true,
padding: 10,
position: 'top',
text: '',
weight: 2000 // by default greater than legend (1000) to be above
},
defaultRoutes: {
color: 'color'
},
descriptors: {
_scriptable: true,
_indexable: false,
},
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.tooltip.js | src/plugins/plugin.tooltip.js | import Animations from '../core/core.animations.js';
import Element from '../core/core.element.js';
import {addRoundedRectPath} from '../helpers/helpers.canvas.js';
import {each, noop, isNullOrUndef, isArray, _elementsEqual, isObject} from '../helpers/helpers.core.js';
import {toFont, toPadding, toTRBLCorners} from '../helpers/helpers.options.js';
import {getRtlAdapter, overrideTextDirection, restoreTextDirection} from '../helpers/helpers.rtl.js';
import {distanceBetweenPoints, _limitValue} from '../helpers/helpers.math.js';
import {createContext, drawPoint} from '../helpers/index.js';
/**
* @typedef { import('../platform/platform.base.js').Chart } Chart
* @typedef { import('../types/index.js').ChartEvent } ChartEvent
* @typedef { import('../types/index.js').ActiveElement } ActiveElement
* @typedef { import('../core/core.interaction.js').InteractionItem } InteractionItem
*/
const positioners = {
/**
* Average mode places the tooltip at the average position of the elements shown
*/
average(items) {
if (!items.length) {
return false;
}
let i, len;
let xSet = new Set();
let y = 0;
let count = 0;
for (i = 0, len = items.length; i < len; ++i) {
const el = items[i].element;
if (el && el.hasValue()) {
const pos = el.tooltipPosition();
xSet.add(pos.x);
y += pos.y;
++count;
}
}
// No visible items where found, return false so we don't have to divide by 0 which reduces in NaN
if (count === 0 || xSet.size === 0) {
return false;
}
const xAverage = [...xSet].reduce((a, b) => a + b) / xSet.size;
return {
x: xAverage,
y: y / count
};
},
/**
* Gets the tooltip position nearest of the item nearest to the event position
*/
nearest(items, eventPosition) {
if (!items.length) {
return false;
}
let x = eventPosition.x;
let y = eventPosition.y;
let minDistance = Number.POSITIVE_INFINITY;
let i, len, nearestElement;
for (i = 0, len = items.length; i < len; ++i) {
const el = items[i].element;
if (el && el.hasValue()) {
const center = el.getCenterPoint();
const d = distanceBetweenPoints(eventPosition, center);
if (d < minDistance) {
minDistance = d;
nearestElement = el;
}
}
}
if (nearestElement) {
const tp = nearestElement.tooltipPosition();
x = tp.x;
y = tp.y;
}
return {
x,
y
};
}
};
// Helper to push or concat based on if the 2nd parameter is an array or not
function pushOrConcat(base, toPush) {
if (toPush) {
if (isArray(toPush)) {
// base = base.concat(toPush);
Array.prototype.push.apply(base, toPush);
} else {
base.push(toPush);
}
}
return base;
}
/**
* Returns array of strings split by newline
* @param {*} str - The value to split by newline.
* @returns {string|string[]} value if newline present - Returned from String split() method
* @function
*/
function splitNewlines(str) {
if ((typeof str === 'string' || str instanceof String) && str.indexOf('\n') > -1) {
return str.split('\n');
}
return str;
}
/**
* Private helper to create a tooltip item model
* @param {Chart} chart
* @param {ActiveElement} item - {element, index, datasetIndex} to create the tooltip item for
* @return new tooltip item
*/
function createTooltipItem(chart, item) {
const {element, datasetIndex, index} = item;
const controller = chart.getDatasetMeta(datasetIndex).controller;
const {label, value} = controller.getLabelAndValue(index);
return {
chart,
label,
parsed: controller.getParsed(index),
raw: chart.data.datasets[datasetIndex].data[index],
formattedValue: value,
dataset: controller.getDataset(),
dataIndex: index,
datasetIndex,
element
};
}
/**
* Get the size of the tooltip
*/
function getTooltipSize(tooltip, options) {
const ctx = tooltip.chart.ctx;
const {body, footer, title} = tooltip;
const {boxWidth, boxHeight} = options;
const bodyFont = toFont(options.bodyFont);
const titleFont = toFont(options.titleFont);
const footerFont = toFont(options.footerFont);
const titleLineCount = title.length;
const footerLineCount = footer.length;
const bodyLineItemCount = body.length;
const padding = toPadding(options.padding);
let height = padding.height;
let width = 0;
// Count of all lines in the body
let combinedBodyLength = body.reduce((count, bodyItem) => count + bodyItem.before.length + bodyItem.lines.length + bodyItem.after.length, 0);
combinedBodyLength += tooltip.beforeBody.length + tooltip.afterBody.length;
if (titleLineCount) {
height += titleLineCount * titleFont.lineHeight
+ (titleLineCount - 1) * options.titleSpacing
+ options.titleMarginBottom;
}
if (combinedBodyLength) {
// Body lines may include some extra height depending on boxHeight
const bodyLineHeight = options.displayColors ? Math.max(boxHeight, bodyFont.lineHeight) : bodyFont.lineHeight;
height += bodyLineItemCount * bodyLineHeight
+ (combinedBodyLength - bodyLineItemCount) * bodyFont.lineHeight
+ (combinedBodyLength - 1) * options.bodySpacing;
}
if (footerLineCount) {
height += options.footerMarginTop
+ footerLineCount * footerFont.lineHeight
+ (footerLineCount - 1) * options.footerSpacing;
}
// Title width
let widthPadding = 0;
const maxLineWidth = function(line) {
width = Math.max(width, ctx.measureText(line).width + widthPadding);
};
ctx.save();
ctx.font = titleFont.string;
each(tooltip.title, maxLineWidth);
// Body width
ctx.font = bodyFont.string;
each(tooltip.beforeBody.concat(tooltip.afterBody), maxLineWidth);
// Body lines may include some extra width due to the color box
widthPadding = options.displayColors ? (boxWidth + 2 + options.boxPadding) : 0;
each(body, (bodyItem) => {
each(bodyItem.before, maxLineWidth);
each(bodyItem.lines, maxLineWidth);
each(bodyItem.after, maxLineWidth);
});
// Reset back to 0
widthPadding = 0;
// Footer width
ctx.font = footerFont.string;
each(tooltip.footer, maxLineWidth);
ctx.restore();
// Add padding
width += padding.width;
return {width, height};
}
function determineYAlign(chart, size) {
const {y, height} = size;
if (y < height / 2) {
return 'top';
} else if (y > (chart.height - height / 2)) {
return 'bottom';
}
return 'center';
}
function doesNotFitWithAlign(xAlign, chart, options, size) {
const {x, width} = size;
const caret = options.caretSize + options.caretPadding;
if (xAlign === 'left' && x + width + caret > chart.width) {
return true;
}
if (xAlign === 'right' && x - width - caret < 0) {
return true;
}
}
function determineXAlign(chart, options, size, yAlign) {
const {x, width} = size;
const {width: chartWidth, chartArea: {left, right}} = chart;
let xAlign = 'center';
if (yAlign === 'center') {
xAlign = x <= (left + right) / 2 ? 'left' : 'right';
} else if (x <= width / 2) {
xAlign = 'left';
} else if (x >= chartWidth - width / 2) {
xAlign = 'right';
}
if (doesNotFitWithAlign(xAlign, chart, options, size)) {
xAlign = 'center';
}
return xAlign;
}
/**
* Helper to get the alignment of a tooltip given the size
*/
function determineAlignment(chart, options, size) {
const yAlign = size.yAlign || options.yAlign || determineYAlign(chart, size);
return {
xAlign: size.xAlign || options.xAlign || determineXAlign(chart, options, size, yAlign),
yAlign
};
}
function alignX(size, xAlign) {
let {x, width} = size;
if (xAlign === 'right') {
x -= width;
} else if (xAlign === 'center') {
x -= (width / 2);
}
return x;
}
function alignY(size, yAlign, paddingAndSize) {
// eslint-disable-next-line prefer-const
let {y, height} = size;
if (yAlign === 'top') {
y += paddingAndSize;
} else if (yAlign === 'bottom') {
y -= height + paddingAndSize;
} else {
y -= (height / 2);
}
return y;
}
/**
* Helper to get the location a tooltip needs to be placed at given the initial position (via the vm) and the size and alignment
*/
function getBackgroundPoint(options, size, alignment, chart) {
const {caretSize, caretPadding, cornerRadius} = options;
const {xAlign, yAlign} = alignment;
const paddingAndSize = caretSize + caretPadding;
const {topLeft, topRight, bottomLeft, bottomRight} = toTRBLCorners(cornerRadius);
let x = alignX(size, xAlign);
const y = alignY(size, yAlign, paddingAndSize);
if (yAlign === 'center') {
if (xAlign === 'left') {
x += paddingAndSize;
} else if (xAlign === 'right') {
x -= paddingAndSize;
}
} else if (xAlign === 'left') {
x -= Math.max(topLeft, bottomLeft) + caretSize;
} else if (xAlign === 'right') {
x += Math.max(topRight, bottomRight) + caretSize;
}
return {
x: _limitValue(x, 0, chart.width - size.width),
y: _limitValue(y, 0, chart.height - size.height)
};
}
function getAlignedX(tooltip, align, options) {
const padding = toPadding(options.padding);
return align === 'center'
? tooltip.x + tooltip.width / 2
: align === 'right'
? tooltip.x + tooltip.width - padding.right
: tooltip.x + padding.left;
}
/**
* Helper to build before and after body lines
*/
function getBeforeAfterBodyLines(callback) {
return pushOrConcat([], splitNewlines(callback));
}
function createTooltipContext(parent, tooltip, tooltipItems) {
return createContext(parent, {
tooltip,
tooltipItems,
type: 'tooltip'
});
}
function overrideCallbacks(callbacks, context) {
const override = context && context.dataset && context.dataset.tooltip && context.dataset.tooltip.callbacks;
return override ? callbacks.override(override) : callbacks;
}
const defaultCallbacks = {
// Args are: (tooltipItems, data)
beforeTitle: noop,
title(tooltipItems) {
if (tooltipItems.length > 0) {
const item = tooltipItems[0];
const labels = item.chart.data.labels;
const labelCount = labels ? labels.length : 0;
if (this && this.options && this.options.mode === 'dataset') {
return item.dataset.label || '';
} else if (item.label) {
return item.label;
} else if (labelCount > 0 && item.dataIndex < labelCount) {
return labels[item.dataIndex];
}
}
return '';
},
afterTitle: noop,
// Args are: (tooltipItems, data)
beforeBody: noop,
// Args are: (tooltipItem, data)
beforeLabel: noop,
label(tooltipItem) {
if (this && this.options && this.options.mode === 'dataset') {
return tooltipItem.label + ': ' + tooltipItem.formattedValue || tooltipItem.formattedValue;
}
let label = tooltipItem.dataset.label || '';
if (label) {
label += ': ';
}
const value = tooltipItem.formattedValue;
if (!isNullOrUndef(value)) {
label += value;
}
return label;
},
labelColor(tooltipItem) {
const meta = tooltipItem.chart.getDatasetMeta(tooltipItem.datasetIndex);
const options = meta.controller.getStyle(tooltipItem.dataIndex);
return {
borderColor: options.borderColor,
backgroundColor: options.backgroundColor,
borderWidth: options.borderWidth,
borderDash: options.borderDash,
borderDashOffset: options.borderDashOffset,
borderRadius: 0,
};
},
labelTextColor() {
return this.options.bodyColor;
},
labelPointStyle(tooltipItem) {
const meta = tooltipItem.chart.getDatasetMeta(tooltipItem.datasetIndex);
const options = meta.controller.getStyle(tooltipItem.dataIndex);
return {
pointStyle: options.pointStyle,
rotation: options.rotation,
};
},
afterLabel: noop,
// Args are: (tooltipItems, data)
afterBody: noop,
// Args are: (tooltipItems, data)
beforeFooter: noop,
footer: noop,
afterFooter: noop
};
/**
* Invoke callback from object with context and arguments.
* If callback returns `undefined`, then will be invoked default callback.
* @param {Record<keyof typeof defaultCallbacks, Function>} callbacks
* @param {keyof typeof defaultCallbacks} name
* @param {*} ctx
* @param {*} arg
* @returns {any}
*/
function invokeCallbackWithFallback(callbacks, name, ctx, arg) {
const result = callbacks[name].call(ctx, arg);
if (typeof result === 'undefined') {
return defaultCallbacks[name].call(ctx, arg);
}
return result;
}
export class Tooltip extends Element {
/**
* @namespace Chart.Tooltip.positioners
*/
static positioners = positioners;
constructor(config) {
super();
this.opacity = 0;
this._active = [];
this._eventPosition = undefined;
this._size = undefined;
this._cachedAnimations = undefined;
this._tooltipItems = [];
this.$animations = undefined;
this.$context = undefined;
this.chart = config.chart;
this.options = config.options;
this.dataPoints = undefined;
this.title = undefined;
this.beforeBody = undefined;
this.body = undefined;
this.afterBody = undefined;
this.footer = undefined;
this.xAlign = undefined;
this.yAlign = undefined;
this.x = undefined;
this.y = undefined;
this.height = undefined;
this.width = undefined;
this.caretX = undefined;
this.caretY = undefined;
// TODO: V4, make this private, rename to `_labelStyles`, and combine with `labelPointStyles`
// and `labelTextColors` to create a single variable
this.labelColors = undefined;
this.labelPointStyles = undefined;
this.labelTextColors = undefined;
}
initialize(options) {
this.options = options;
this._cachedAnimations = undefined;
this.$context = undefined;
}
/**
* @private
*/
_resolveAnimations() {
const cached = this._cachedAnimations;
if (cached) {
return cached;
}
const chart = this.chart;
const options = this.options.setContext(this.getContext());
const opts = options.enabled && chart.options.animation && options.animations;
const animations = new Animations(this.chart, opts);
if (opts._cacheable) {
this._cachedAnimations = Object.freeze(animations);
}
return animations;
}
/**
* @protected
*/
getContext() {
return this.$context ||
(this.$context = createTooltipContext(this.chart.getContext(), this, this._tooltipItems));
}
getTitle(context, options) {
const {callbacks} = options;
const beforeTitle = invokeCallbackWithFallback(callbacks, 'beforeTitle', this, context);
const title = invokeCallbackWithFallback(callbacks, 'title', this, context);
const afterTitle = invokeCallbackWithFallback(callbacks, 'afterTitle', this, context);
let lines = [];
lines = pushOrConcat(lines, splitNewlines(beforeTitle));
lines = pushOrConcat(lines, splitNewlines(title));
lines = pushOrConcat(lines, splitNewlines(afterTitle));
return lines;
}
getBeforeBody(tooltipItems, options) {
return getBeforeAfterBodyLines(
invokeCallbackWithFallback(options.callbacks, 'beforeBody', this, tooltipItems)
);
}
getBody(tooltipItems, options) {
const {callbacks} = options;
const bodyItems = [];
each(tooltipItems, (context) => {
const bodyItem = {
before: [],
lines: [],
after: []
};
const scoped = overrideCallbacks(callbacks, context);
pushOrConcat(bodyItem.before, splitNewlines(invokeCallbackWithFallback(scoped, 'beforeLabel', this, context)));
pushOrConcat(bodyItem.lines, invokeCallbackWithFallback(scoped, 'label', this, context));
pushOrConcat(bodyItem.after, splitNewlines(invokeCallbackWithFallback(scoped, 'afterLabel', this, context)));
bodyItems.push(bodyItem);
});
return bodyItems;
}
getAfterBody(tooltipItems, options) {
return getBeforeAfterBodyLines(
invokeCallbackWithFallback(options.callbacks, 'afterBody', this, tooltipItems)
);
}
// Get the footer and beforeFooter and afterFooter lines
getFooter(tooltipItems, options) {
const {callbacks} = options;
const beforeFooter = invokeCallbackWithFallback(callbacks, 'beforeFooter', this, tooltipItems);
const footer = invokeCallbackWithFallback(callbacks, 'footer', this, tooltipItems);
const afterFooter = invokeCallbackWithFallback(callbacks, 'afterFooter', this, tooltipItems);
let lines = [];
lines = pushOrConcat(lines, splitNewlines(beforeFooter));
lines = pushOrConcat(lines, splitNewlines(footer));
lines = pushOrConcat(lines, splitNewlines(afterFooter));
return lines;
}
/**
* @private
*/
_createItems(options) {
const active = this._active;
const data = this.chart.data;
const labelColors = [];
const labelPointStyles = [];
const labelTextColors = [];
let tooltipItems = [];
let i, len;
for (i = 0, len = active.length; i < len; ++i) {
tooltipItems.push(createTooltipItem(this.chart, active[i]));
}
// If the user provided a filter function, use it to modify the tooltip items
if (options.filter) {
tooltipItems = tooltipItems.filter((element, index, array) => options.filter(element, index, array, data));
}
// If the user provided a sorting function, use it to modify the tooltip items
if (options.itemSort) {
tooltipItems = tooltipItems.sort((a, b) => options.itemSort(a, b, data));
}
// Determine colors for boxes
each(tooltipItems, (context) => {
const scoped = overrideCallbacks(options.callbacks, context);
labelColors.push(invokeCallbackWithFallback(scoped, 'labelColor', this, context));
labelPointStyles.push(invokeCallbackWithFallback(scoped, 'labelPointStyle', this, context));
labelTextColors.push(invokeCallbackWithFallback(scoped, 'labelTextColor', this, context));
});
this.labelColors = labelColors;
this.labelPointStyles = labelPointStyles;
this.labelTextColors = labelTextColors;
this.dataPoints = tooltipItems;
return tooltipItems;
}
update(changed, replay) {
const options = this.options.setContext(this.getContext());
const active = this._active;
let properties;
let tooltipItems = [];
if (!active.length) {
if (this.opacity !== 0) {
properties = {
opacity: 0
};
}
} else {
const position = positioners[options.position].call(this, active, this._eventPosition);
tooltipItems = this._createItems(options);
this.title = this.getTitle(tooltipItems, options);
this.beforeBody = this.getBeforeBody(tooltipItems, options);
this.body = this.getBody(tooltipItems, options);
this.afterBody = this.getAfterBody(tooltipItems, options);
this.footer = this.getFooter(tooltipItems, options);
const size = this._size = getTooltipSize(this, options);
const positionAndSize = Object.assign({}, position, size);
const alignment = determineAlignment(this.chart, options, positionAndSize);
const backgroundPoint = getBackgroundPoint(options, positionAndSize, alignment, this.chart);
this.xAlign = alignment.xAlign;
this.yAlign = alignment.yAlign;
properties = {
opacity: 1,
x: backgroundPoint.x,
y: backgroundPoint.y,
width: size.width,
height: size.height,
caretX: position.x,
caretY: position.y
};
}
this._tooltipItems = tooltipItems;
this.$context = undefined;
if (properties) {
this._resolveAnimations().update(this, properties);
}
if (changed && options.external) {
options.external.call(this, {chart: this.chart, tooltip: this, replay});
}
}
drawCaret(tooltipPoint, ctx, size, options) {
const caretPosition = this.getCaretPosition(tooltipPoint, size, options);
ctx.lineTo(caretPosition.x1, caretPosition.y1);
ctx.lineTo(caretPosition.x2, caretPosition.y2);
ctx.lineTo(caretPosition.x3, caretPosition.y3);
}
getCaretPosition(tooltipPoint, size, options) {
const {xAlign, yAlign} = this;
const {caretSize, cornerRadius} = options;
const {topLeft, topRight, bottomLeft, bottomRight} = toTRBLCorners(cornerRadius);
const {x: ptX, y: ptY} = tooltipPoint;
const {width, height} = size;
let x1, x2, x3, y1, y2, y3;
if (yAlign === 'center') {
y2 = ptY + (height / 2);
if (xAlign === 'left') {
x1 = ptX;
x2 = x1 - caretSize;
// Left draws bottom -> top, this y1 is on the bottom
y1 = y2 + caretSize;
y3 = y2 - caretSize;
} else {
x1 = ptX + width;
x2 = x1 + caretSize;
// Right draws top -> bottom, thus y1 is on the top
y1 = y2 - caretSize;
y3 = y2 + caretSize;
}
x3 = x1;
} else {
if (xAlign === 'left') {
x2 = ptX + Math.max(topLeft, bottomLeft) + (caretSize);
} else if (xAlign === 'right') {
x2 = ptX + width - Math.max(topRight, bottomRight) - caretSize;
} else {
x2 = this.caretX;
}
if (yAlign === 'top') {
y1 = ptY;
y2 = y1 - caretSize;
// Top draws left -> right, thus x1 is on the left
x1 = x2 - caretSize;
x3 = x2 + caretSize;
} else {
y1 = ptY + height;
y2 = y1 + caretSize;
// Bottom draws right -> left, thus x1 is on the right
x1 = x2 + caretSize;
x3 = x2 - caretSize;
}
y3 = y1;
}
return {x1, x2, x3, y1, y2, y3};
}
drawTitle(pt, ctx, options) {
const title = this.title;
const length = title.length;
let titleFont, titleSpacing, i;
if (length) {
const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);
pt.x = getAlignedX(this, options.titleAlign, options);
ctx.textAlign = rtlHelper.textAlign(options.titleAlign);
ctx.textBaseline = 'middle';
titleFont = toFont(options.titleFont);
titleSpacing = options.titleSpacing;
ctx.fillStyle = options.titleColor;
ctx.font = titleFont.string;
for (i = 0; i < length; ++i) {
ctx.fillText(title[i], rtlHelper.x(pt.x), pt.y + titleFont.lineHeight / 2);
pt.y += titleFont.lineHeight + titleSpacing; // Line Height and spacing
if (i + 1 === length) {
pt.y += options.titleMarginBottom - titleSpacing; // If Last, add margin, remove spacing
}
}
}
}
/**
* @private
*/
_drawColorBox(ctx, pt, i, rtlHelper, options) {
const labelColor = this.labelColors[i];
const labelPointStyle = this.labelPointStyles[i];
const {boxHeight, boxWidth} = options;
const bodyFont = toFont(options.bodyFont);
const colorX = getAlignedX(this, 'left', options);
const rtlColorX = rtlHelper.x(colorX);
const yOffSet = boxHeight < bodyFont.lineHeight ? (bodyFont.lineHeight - boxHeight) / 2 : 0;
const colorY = pt.y + yOffSet;
if (options.usePointStyle) {
const drawOptions = {
radius: Math.min(boxWidth, boxHeight) / 2, // fit the circle in the box
pointStyle: labelPointStyle.pointStyle,
rotation: labelPointStyle.rotation,
borderWidth: 1
};
// Recalculate x and y for drawPoint() because its expecting
// x and y to be center of figure (instead of top left)
const centerX = rtlHelper.leftForLtr(rtlColorX, boxWidth) + boxWidth / 2;
const centerY = colorY + boxHeight / 2;
// Fill the point with white so that colours merge nicely if the opacity is < 1
ctx.strokeStyle = options.multiKeyBackground;
ctx.fillStyle = options.multiKeyBackground;
drawPoint(ctx, drawOptions, centerX, centerY);
// Draw the point
ctx.strokeStyle = labelColor.borderColor;
ctx.fillStyle = labelColor.backgroundColor;
drawPoint(ctx, drawOptions, centerX, centerY);
} else {
// Border
ctx.lineWidth = isObject(labelColor.borderWidth) ? Math.max(...Object.values(labelColor.borderWidth)) : (labelColor.borderWidth || 1); // TODO, v4 remove fallback
ctx.strokeStyle = labelColor.borderColor;
ctx.setLineDash(labelColor.borderDash || []);
ctx.lineDashOffset = labelColor.borderDashOffset || 0;
// Fill a white rect so that colours merge nicely if the opacity is < 1
const outerX = rtlHelper.leftForLtr(rtlColorX, boxWidth);
const innerX = rtlHelper.leftForLtr(rtlHelper.xPlus(rtlColorX, 1), boxWidth - 2);
const borderRadius = toTRBLCorners(labelColor.borderRadius);
if (Object.values(borderRadius).some(v => v !== 0)) {
ctx.beginPath();
ctx.fillStyle = options.multiKeyBackground;
addRoundedRectPath(ctx, {
x: outerX,
y: colorY,
w: boxWidth,
h: boxHeight,
radius: borderRadius,
});
ctx.fill();
ctx.stroke();
// Inner square
ctx.fillStyle = labelColor.backgroundColor;
ctx.beginPath();
addRoundedRectPath(ctx, {
x: innerX,
y: colorY + 1,
w: boxWidth - 2,
h: boxHeight - 2,
radius: borderRadius,
});
ctx.fill();
} else {
// Normal rect
ctx.fillStyle = options.multiKeyBackground;
ctx.fillRect(outerX, colorY, boxWidth, boxHeight);
ctx.strokeRect(outerX, colorY, boxWidth, boxHeight);
// Inner square
ctx.fillStyle = labelColor.backgroundColor;
ctx.fillRect(innerX, colorY + 1, boxWidth - 2, boxHeight - 2);
}
}
// restore fillStyle
ctx.fillStyle = this.labelTextColors[i];
}
drawBody(pt, ctx, options) {
const {body} = this;
const {bodySpacing, bodyAlign, displayColors, boxHeight, boxWidth, boxPadding} = options;
const bodyFont = toFont(options.bodyFont);
let bodyLineHeight = bodyFont.lineHeight;
let xLinePadding = 0;
const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);
const fillLineOfText = function(line) {
ctx.fillText(line, rtlHelper.x(pt.x + xLinePadding), pt.y + bodyLineHeight / 2);
pt.y += bodyLineHeight + bodySpacing;
};
const bodyAlignForCalculation = rtlHelper.textAlign(bodyAlign);
let bodyItem, textColor, lines, i, j, ilen, jlen;
ctx.textAlign = bodyAlign;
ctx.textBaseline = 'middle';
ctx.font = bodyFont.string;
pt.x = getAlignedX(this, bodyAlignForCalculation, options);
// Before body lines
ctx.fillStyle = options.bodyColor;
each(this.beforeBody, fillLineOfText);
xLinePadding = displayColors && bodyAlignForCalculation !== 'right'
? bodyAlign === 'center' ? (boxWidth / 2 + boxPadding) : (boxWidth + 2 + boxPadding)
: 0;
// Draw body lines now
for (i = 0, ilen = body.length; i < ilen; ++i) {
bodyItem = body[i];
textColor = this.labelTextColors[i];
ctx.fillStyle = textColor;
each(bodyItem.before, fillLineOfText);
lines = bodyItem.lines;
// Draw Legend-like boxes if needed
if (displayColors && lines.length) {
this._drawColorBox(ctx, pt, i, rtlHelper, options);
bodyLineHeight = Math.max(bodyFont.lineHeight, boxHeight);
}
for (j = 0, jlen = lines.length; j < jlen; ++j) {
fillLineOfText(lines[j]);
// Reset for any lines that don't include colorbox
bodyLineHeight = bodyFont.lineHeight;
}
each(bodyItem.after, fillLineOfText);
}
// Reset back to 0 for after body
xLinePadding = 0;
bodyLineHeight = bodyFont.lineHeight;
// After body lines
each(this.afterBody, fillLineOfText);
pt.y -= bodySpacing; // Remove last body spacing
}
drawFooter(pt, ctx, options) {
const footer = this.footer;
const length = footer.length;
let footerFont, i;
if (length) {
const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);
pt.x = getAlignedX(this, options.footerAlign, options);
pt.y += options.footerMarginTop;
ctx.textAlign = rtlHelper.textAlign(options.footerAlign);
ctx.textBaseline = 'middle';
footerFont = toFont(options.footerFont);
ctx.fillStyle = options.footerColor;
ctx.font = footerFont.string;
for (i = 0; i < length; ++i) {
ctx.fillText(footer[i], rtlHelper.x(pt.x), pt.y + footerFont.lineHeight / 2);
pt.y += footerFont.lineHeight + options.footerSpacing;
}
}
}
drawBackground(pt, ctx, tooltipSize, options) {
const {xAlign, yAlign} = this;
const {x, y} = pt;
const {width, height} = tooltipSize;
const {topLeft, topRight, bottomLeft, bottomRight} = toTRBLCorners(options.cornerRadius);
ctx.fillStyle = options.backgroundColor;
ctx.strokeStyle = options.borderColor;
ctx.lineWidth = options.borderWidth;
ctx.beginPath();
ctx.moveTo(x + topLeft, y);
if (yAlign === 'top') {
this.drawCaret(pt, ctx, tooltipSize, options);
}
ctx.lineTo(x + width - topRight, y);
ctx.quadraticCurveTo(x + width, y, x + width, y + topRight);
if (yAlign === 'center' && xAlign === 'right') {
this.drawCaret(pt, ctx, tooltipSize, options);
}
ctx.lineTo(x + width, y + height - bottomRight);
ctx.quadraticCurveTo(x + width, y + height, x + width - bottomRight, y + height);
if (yAlign === 'bottom') {
this.drawCaret(pt, ctx, tooltipSize, options);
}
ctx.lineTo(x + bottomLeft, y + height);
ctx.quadraticCurveTo(x, y + height, x, y + height - bottomLeft);
if (yAlign === 'center' && xAlign === 'left') {
this.drawCaret(pt, ctx, tooltipSize, options);
}
ctx.lineTo(x, y + topLeft);
ctx.quadraticCurveTo(x, y, x + topLeft, y);
ctx.closePath();
ctx.fill();
if (options.borderWidth > 0) {
ctx.stroke();
}
}
/**
* Update x/y animation targets when _active elements are animating too
* @private
*/
_updateAnimationTarget(options) {
const chart = this.chart;
const anims = this.$animations;
const animX = anims && anims.x;
const animY = anims && anims.y;
if (animX || animY) {
const position = positioners[options.position].call(this, this._active, this._eventPosition);
if (!position) {
return;
}
const size = this._size = getTooltipSize(this, options);
const positionAndSize = Object.assign({}, position, this._size);
const alignment = determineAlignment(chart, options, positionAndSize);
const point = getBackgroundPoint(options, positionAndSize, alignment, chart);
if (animX._to !== point.x || animY._to !== point.y) {
this.xAlign = alignment.xAlign;
this.yAlign = alignment.yAlign;
this.width = size.width;
this.height = size.height;
this.caretX = position.x;
this.caretY = position.y;
this._resolveAnimations().update(this, point);
}
}
}
/**
* Determine if the tooltip will draw anything
* @returns {boolean} True if the tooltip will render
*/
_willRender() {
return !!this.opacity;
}
draw(ctx) {
const options = this.options.setContext(this.getContext());
let opacity = this.opacity;
if (!opacity) {
return;
}
this._updateAnimationTarget(options);
const tooltipSize = {
width: this.width,
height: this.height
};
const pt = {
x: this.x,
y: this.y
};
// IE11/Edge does not like very small opacities, so snap to 0
opacity = Math.abs(opacity) < 1e-3 ? 0 : opacity;
const padding = toPadding(options.padding);
// Truthy/falsey value for empty tooltip
const hasTooltipContent = this.title.length || this.beforeBody.length || this.body.length || this.afterBody.length || this.footer.length;
if (options.enabled && hasTooltipContent) {
ctx.save();
ctx.globalAlpha = opacity;
// Draw Background
this.drawBackground(pt, ctx, tooltipSize, options);
overrideTextDirection(ctx, options.textDirection);
pt.y += padding.top;
// Titles
this.drawTitle(pt, ctx, options);
// Body
this.drawBody(pt, ctx, options);
// Footer
this.drawFooter(pt, ctx, options);
restoreTextDirection(ctx, options.textDirection);
ctx.restore();
}
}
/**
* Get active elements in the tooltip
* @returns {Array} Array of elements that are active in the tooltip
*/
getActiveElements() {
return this._active || [];
}
/**
* Set active elements in the tooltip
* @param {array} activeElements Array of active datasetIndex/index pairs.
* @param {object} eventPosition Synthetic event position used in positioning
*/
setActiveElements(activeElements, eventPosition) {
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | true |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.decimation.js | src/plugins/plugin.decimation.js | import {_limitValue, _lookupByKey, isNullOrUndef, resolve} from '../helpers/index.js';
function lttbDecimation(data, start, count, availableWidth, options) {
/**
* Implementation of the Largest Triangle Three Buckets algorithm.
*
* This implementation is based on the original implementation by Sveinn Steinarsson
* in https://github.com/sveinn-steinarsson/flot-downsample/blob/master/jquery.flot.downsample.js
*
* The original implementation is MIT licensed.
*/
const samples = options.samples || availableWidth;
// There are less points than the threshold, returning the whole array
if (samples >= count) {
return data.slice(start, start + count);
}
const decimated = [];
const bucketWidth = (count - 2) / (samples - 2);
let sampledIndex = 0;
const endIndex = start + count - 1;
// Starting from offset
let a = start;
let i, maxAreaPoint, maxArea, area, nextA;
decimated[sampledIndex++] = data[a];
for (i = 0; i < samples - 2; i++) {
let avgX = 0;
let avgY = 0;
let j;
// Adding offset
const avgRangeStart = Math.floor((i + 1) * bucketWidth) + 1 + start;
const avgRangeEnd = Math.min(Math.floor((i + 2) * bucketWidth) + 1, count) + start;
const avgRangeLength = avgRangeEnd - avgRangeStart;
for (j = avgRangeStart; j < avgRangeEnd; j++) {
avgX += data[j].x;
avgY += data[j].y;
}
avgX /= avgRangeLength;
avgY /= avgRangeLength;
// Adding offset
const rangeOffs = Math.floor(i * bucketWidth) + 1 + start;
const rangeTo = Math.min(Math.floor((i + 1) * bucketWidth) + 1, count) + start;
const {x: pointAx, y: pointAy} = data[a];
// Note that this is changed from the original algorithm which initializes these
// values to 1. The reason for this change is that if the area is small, nextA
// would never be set and thus a crash would occur in the next loop as `a` would become
// `undefined`. Since the area is always positive, but could be 0 in the case of a flat trace,
// initializing with a negative number is the correct solution.
maxArea = area = -1;
for (j = rangeOffs; j < rangeTo; j++) {
area = 0.5 * Math.abs(
(pointAx - avgX) * (data[j].y - pointAy) -
(pointAx - data[j].x) * (avgY - pointAy)
);
if (area > maxArea) {
maxArea = area;
maxAreaPoint = data[j];
nextA = j;
}
}
decimated[sampledIndex++] = maxAreaPoint;
a = nextA;
}
// Include the last point
decimated[sampledIndex++] = data[endIndex];
return decimated;
}
function minMaxDecimation(data, start, count, availableWidth) {
let avgX = 0;
let countX = 0;
let i, point, x, y, prevX, minIndex, maxIndex, startIndex, minY, maxY;
const decimated = [];
const endIndex = start + count - 1;
const xMin = data[start].x;
const xMax = data[endIndex].x;
const dx = xMax - xMin;
for (i = start; i < start + count; ++i) {
point = data[i];
x = (point.x - xMin) / dx * availableWidth;
y = point.y;
const truncX = x | 0;
if (truncX === prevX) {
// Determine `minY` / `maxY` and `avgX` while we stay within same x-position
if (y < minY) {
minY = y;
minIndex = i;
} else if (y > maxY) {
maxY = y;
maxIndex = i;
}
// For first point in group, countX is `0`, so average will be `x` / 1.
// Use point.x here because we're computing the average data `x` value
avgX = (countX * avgX + point.x) / ++countX;
} else {
// Push up to 4 points, 3 for the last interval and the first point for this interval
const lastIndex = i - 1;
if (!isNullOrUndef(minIndex) && !isNullOrUndef(maxIndex)) {
// The interval is defined by 4 points: start, min, max, end.
// The starting point is already considered at this point, so we need to determine which
// of the other points to add. We need to sort these points to ensure the decimated data
// is still sorted and then ensure there are no duplicates.
const intermediateIndex1 = Math.min(minIndex, maxIndex);
const intermediateIndex2 = Math.max(minIndex, maxIndex);
if (intermediateIndex1 !== startIndex && intermediateIndex1 !== lastIndex) {
decimated.push({
...data[intermediateIndex1],
x: avgX,
});
}
if (intermediateIndex2 !== startIndex && intermediateIndex2 !== lastIndex) {
decimated.push({
...data[intermediateIndex2],
x: avgX
});
}
}
// lastIndex === startIndex will occur when a range has only 1 point which could
// happen with very uneven data
if (i > 0 && lastIndex !== startIndex) {
// Last point in the previous interval
decimated.push(data[lastIndex]);
}
// Start of the new interval
decimated.push(point);
prevX = truncX;
countX = 0;
minY = maxY = y;
minIndex = maxIndex = startIndex = i;
}
}
return decimated;
}
function cleanDecimatedDataset(dataset) {
if (dataset._decimated) {
const data = dataset._data;
delete dataset._decimated;
delete dataset._data;
Object.defineProperty(dataset, 'data', {
configurable: true,
enumerable: true,
writable: true,
value: data,
});
}
}
function cleanDecimatedData(chart) {
chart.data.datasets.forEach((dataset) => {
cleanDecimatedDataset(dataset);
});
}
function getStartAndCountOfVisiblePointsSimplified(meta, points) {
const pointCount = points.length;
let start = 0;
let count;
const {iScale} = meta;
const {min, max, minDefined, maxDefined} = iScale.getUserBounds();
if (minDefined) {
start = _limitValue(_lookupByKey(points, iScale.axis, min).lo, 0, pointCount - 1);
}
if (maxDefined) {
count = _limitValue(_lookupByKey(points, iScale.axis, max).hi + 1, start, pointCount) - start;
} else {
count = pointCount - start;
}
return {start, count};
}
export default {
id: 'decimation',
defaults: {
algorithm: 'min-max',
enabled: false,
},
beforeElementsUpdate: (chart, args, options) => {
if (!options.enabled) {
// The decimation plugin may have been previously enabled. Need to remove old `dataset._data` handlers
cleanDecimatedData(chart);
return;
}
// Assume the entire chart is available to show a few more points than needed
const availableWidth = chart.width;
chart.data.datasets.forEach((dataset, datasetIndex) => {
const {_data, indexAxis} = dataset;
const meta = chart.getDatasetMeta(datasetIndex);
const data = _data || dataset.data;
if (resolve([indexAxis, chart.options.indexAxis]) === 'y') {
// Decimation is only supported for lines that have an X indexAxis
return;
}
if (!meta.controller.supportsDecimation) {
// Only line datasets are supported
return;
}
const xAxis = chart.scales[meta.xAxisID];
if (xAxis.type !== 'linear' && xAxis.type !== 'time') {
// Only linear interpolation is supported
return;
}
if (chart.options.parsing) {
// Plugin only supports data that does not need parsing
return;
}
let {start, count} = getStartAndCountOfVisiblePointsSimplified(meta, data);
const threshold = options.threshold || 4 * availableWidth;
if (count <= threshold) {
// No decimation is required until we are above this threshold
cleanDecimatedDataset(dataset);
return;
}
if (isNullOrUndef(_data)) {
// First time we are seeing this dataset
// We override the 'data' property with a setter that stores the
// raw data in _data, but reads the decimated data from _decimated
dataset._data = data;
delete dataset.data;
Object.defineProperty(dataset, 'data', {
configurable: true,
enumerable: true,
get: function() {
return this._decimated;
},
set: function(d) {
this._data = d;
}
});
}
// Point the chart to the decimated data
let decimated;
switch (options.algorithm) {
case 'lttb':
decimated = lttbDecimation(data, start, count, availableWidth, options);
break;
case 'min-max':
decimated = minMaxDecimation(data, start, count, availableWidth);
break;
default:
throw new Error(`Unsupported decimation algorithm '${options.algorithm}'`);
}
dataset._decimated = decimated;
});
},
destroy(chart) {
cleanDecimatedData(chart);
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/index.js | src/plugins/index.js | export {default as Colors} from './plugin.colors.js';
export {default as Decimation} from './plugin.decimation.js';
export {default as Filler} from './plugin.filler/index.js';
export {default as Legend} from './plugin.legend.js';
export {default as SubTitle} from './plugin.subtitle.js';
export {default as Title} from './plugin.title.js';
export {default as Tooltip} from './plugin.tooltip.js';
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.subtitle.js | src/plugins/plugin.subtitle.js | import {Title} from './plugin.title.js';
import layouts from '../core/core.layouts.js';
const map = new WeakMap();
export default {
id: 'subtitle',
start(chart, _args, options) {
const title = new Title({
ctx: chart.ctx,
options,
chart
});
layouts.configure(chart, title, options);
layouts.addBox(chart, title);
map.set(chart, title);
},
stop(chart) {
layouts.removeBox(chart, map.get(chart));
map.delete(chart);
},
beforeUpdate(chart, _args, options) {
const title = map.get(chart);
layouts.configure(chart, title, options);
title.options = options;
},
defaults: {
align: 'center',
display: false,
font: {
weight: 'normal',
},
fullSize: true,
padding: 0,
position: 'top',
text: '',
weight: 1500 // by default greater than legend (1000) and smaller than title (2000)
},
defaultRoutes: {
color: 'color'
},
descriptors: {
_scriptable: true,
_indexable: false,
},
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.legend.js | src/plugins/plugin.legend.js | import defaults from '../core/core.defaults.js';
import Element from '../core/core.element.js';
import layouts from '../core/core.layouts.js';
import {addRoundedRectPath, drawPointLegend, renderText} from '../helpers/helpers.canvas.js';
import {
_isBetween,
callback as call,
clipArea,
getRtlAdapter,
overrideTextDirection,
restoreTextDirection,
toFont,
toPadding,
unclipArea,
valueOrDefault,
} from '../helpers/index.js';
import {_alignStartEnd, _textX, _toLeftRightCenter} from '../helpers/helpers.extras.js';
import {toTRBLCorners} from '../helpers/helpers.options.js';
/**
* @typedef { import('../types/index.js').ChartEvent } ChartEvent
*/
const getBoxSize = (labelOpts, fontSize) => {
let {boxHeight = fontSize, boxWidth = fontSize} = labelOpts;
if (labelOpts.usePointStyle) {
boxHeight = Math.min(boxHeight, fontSize);
boxWidth = labelOpts.pointStyleWidth || Math.min(boxWidth, fontSize);
}
return {
boxWidth,
boxHeight,
itemHeight: Math.max(fontSize, boxHeight)
};
};
const itemsEqual = (a, b) => a !== null && b !== null && a.datasetIndex === b.datasetIndex && a.index === b.index;
export class Legend extends Element {
/**
* @param {{ ctx: any; options: any; chart: any; }} config
*/
constructor(config) {
super();
this._added = false;
// Contains hit boxes for each dataset (in dataset order)
this.legendHitBoxes = [];
/**
* @private
*/
this._hoveredItem = null;
// Are we in doughnut mode which has a different data type
this.doughnutMode = false;
this.chart = config.chart;
this.options = config.options;
this.ctx = config.ctx;
this.legendItems = undefined;
this.columnSizes = undefined;
this.lineWidths = undefined;
this.maxHeight = undefined;
this.maxWidth = undefined;
this.top = undefined;
this.bottom = undefined;
this.left = undefined;
this.right = undefined;
this.height = undefined;
this.width = undefined;
this._margins = undefined;
this.position = undefined;
this.weight = undefined;
this.fullSize = undefined;
}
update(maxWidth, maxHeight, margins) {
this.maxWidth = maxWidth;
this.maxHeight = maxHeight;
this._margins = margins;
this.setDimensions();
this.buildLabels();
this.fit();
}
setDimensions() {
if (this.isHorizontal()) {
this.width = this.maxWidth;
this.left = this._margins.left;
this.right = this.width;
} else {
this.height = this.maxHeight;
this.top = this._margins.top;
this.bottom = this.height;
}
}
buildLabels() {
const labelOpts = this.options.labels || {};
let legendItems = call(labelOpts.generateLabels, [this.chart], this) || [];
if (labelOpts.filter) {
legendItems = legendItems.filter((item) => labelOpts.filter(item, this.chart.data));
}
if (labelOpts.sort) {
legendItems = legendItems.sort((a, b) => labelOpts.sort(a, b, this.chart.data));
}
if (this.options.reverse) {
legendItems.reverse();
}
this.legendItems = legendItems;
}
fit() {
const {options, ctx} = this;
// The legend may not be displayed for a variety of reasons including
// the fact that the defaults got set to `false`.
// When the legend is not displayed, there are no guarantees that the options
// are correctly formatted so we need to bail out as early as possible.
if (!options.display) {
this.width = this.height = 0;
return;
}
const labelOpts = options.labels;
const labelFont = toFont(labelOpts.font);
const fontSize = labelFont.size;
const titleHeight = this._computeTitleHeight();
const {boxWidth, itemHeight} = getBoxSize(labelOpts, fontSize);
let width, height;
ctx.font = labelFont.string;
if (this.isHorizontal()) {
width = this.maxWidth; // fill all the width
height = this._fitRows(titleHeight, fontSize, boxWidth, itemHeight) + 10;
} else {
height = this.maxHeight; // fill all the height
width = this._fitCols(titleHeight, labelFont, boxWidth, itemHeight) + 10;
}
this.width = Math.min(width, options.maxWidth || this.maxWidth);
this.height = Math.min(height, options.maxHeight || this.maxHeight);
}
/**
* @private
*/
_fitRows(titleHeight, fontSize, boxWidth, itemHeight) {
const {ctx, maxWidth, options: {labels: {padding}}} = this;
const hitboxes = this.legendHitBoxes = [];
// Width of each line of legend boxes. Labels wrap onto multiple lines when there are too many to fit on one
const lineWidths = this.lineWidths = [0];
const lineHeight = itemHeight + padding;
let totalHeight = titleHeight;
ctx.textAlign = 'left';
ctx.textBaseline = 'middle';
let row = -1;
let top = -lineHeight;
this.legendItems.forEach((legendItem, i) => {
const itemWidth = boxWidth + (fontSize / 2) + ctx.measureText(legendItem.text).width;
if (i === 0 || lineWidths[lineWidths.length - 1] + itemWidth + 2 * padding > maxWidth) {
totalHeight += lineHeight;
lineWidths[lineWidths.length - (i > 0 ? 0 : 1)] = 0;
top += lineHeight;
row++;
}
hitboxes[i] = {left: 0, top, row, width: itemWidth, height: itemHeight};
lineWidths[lineWidths.length - 1] += itemWidth + padding;
});
return totalHeight;
}
_fitCols(titleHeight, labelFont, boxWidth, _itemHeight) {
const {ctx, maxHeight, options: {labels: {padding}}} = this;
const hitboxes = this.legendHitBoxes = [];
const columnSizes = this.columnSizes = [];
const heightLimit = maxHeight - titleHeight;
let totalWidth = padding;
let currentColWidth = 0;
let currentColHeight = 0;
let left = 0;
let col = 0;
this.legendItems.forEach((legendItem, i) => {
const {itemWidth, itemHeight} = calculateItemSize(boxWidth, labelFont, ctx, legendItem, _itemHeight);
// If too tall, go to new column
if (i > 0 && currentColHeight + itemHeight + 2 * padding > heightLimit) {
totalWidth += currentColWidth + padding;
columnSizes.push({width: currentColWidth, height: currentColHeight}); // previous column size
left += currentColWidth + padding;
col++;
currentColWidth = currentColHeight = 0;
}
// Store the hitbox width and height here. Final position will be updated in `draw`
hitboxes[i] = {left, top: currentColHeight, col, width: itemWidth, height: itemHeight};
// Get max width
currentColWidth = Math.max(currentColWidth, itemWidth);
currentColHeight += itemHeight + padding;
});
totalWidth += currentColWidth;
columnSizes.push({width: currentColWidth, height: currentColHeight}); // previous column size
return totalWidth;
}
adjustHitBoxes() {
if (!this.options.display) {
return;
}
const titleHeight = this._computeTitleHeight();
const {legendHitBoxes: hitboxes, options: {align, labels: {padding}, rtl}} = this;
const rtlHelper = getRtlAdapter(rtl, this.left, this.width);
if (this.isHorizontal()) {
let row = 0;
let left = _alignStartEnd(align, this.left + padding, this.right - this.lineWidths[row]);
for (const hitbox of hitboxes) {
if (row !== hitbox.row) {
row = hitbox.row;
left = _alignStartEnd(align, this.left + padding, this.right - this.lineWidths[row]);
}
hitbox.top += this.top + titleHeight + padding;
hitbox.left = rtlHelper.leftForLtr(rtlHelper.x(left), hitbox.width);
left += hitbox.width + padding;
}
} else {
let col = 0;
let top = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - this.columnSizes[col].height);
for (const hitbox of hitboxes) {
if (hitbox.col !== col) {
col = hitbox.col;
top = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - this.columnSizes[col].height);
}
hitbox.top = top;
hitbox.left += this.left + padding;
hitbox.left = rtlHelper.leftForLtr(rtlHelper.x(hitbox.left), hitbox.width);
top += hitbox.height + padding;
}
}
}
isHorizontal() {
return this.options.position === 'top' || this.options.position === 'bottom';
}
draw() {
if (this.options.display) {
const ctx = this.ctx;
clipArea(ctx, this);
this._draw();
unclipArea(ctx);
}
}
/**
* @private
*/
_draw() {
const {options: opts, columnSizes, lineWidths, ctx} = this;
const {align, labels: labelOpts} = opts;
const defaultColor = defaults.color;
const rtlHelper = getRtlAdapter(opts.rtl, this.left, this.width);
const labelFont = toFont(labelOpts.font);
const {padding} = labelOpts;
const fontSize = labelFont.size;
const halfFontSize = fontSize / 2;
let cursor;
this.drawTitle();
// Canvas setup
ctx.textAlign = rtlHelper.textAlign('left');
ctx.textBaseline = 'middle';
ctx.lineWidth = 0.5;
ctx.font = labelFont.string;
const {boxWidth, boxHeight, itemHeight} = getBoxSize(labelOpts, fontSize);
// current position
const drawLegendBox = function(x, y, legendItem) {
if (isNaN(boxWidth) || boxWidth <= 0 || isNaN(boxHeight) || boxHeight < 0) {
return;
}
// Set the ctx for the box
ctx.save();
const lineWidth = valueOrDefault(legendItem.lineWidth, 1);
ctx.fillStyle = valueOrDefault(legendItem.fillStyle, defaultColor);
ctx.lineCap = valueOrDefault(legendItem.lineCap, 'butt');
ctx.lineDashOffset = valueOrDefault(legendItem.lineDashOffset, 0);
ctx.lineJoin = valueOrDefault(legendItem.lineJoin, 'miter');
ctx.lineWidth = lineWidth;
ctx.strokeStyle = valueOrDefault(legendItem.strokeStyle, defaultColor);
ctx.setLineDash(valueOrDefault(legendItem.lineDash, []));
if (labelOpts.usePointStyle) {
// Recalculate x and y for drawPoint() because its expecting
// x and y to be center of figure (instead of top left)
const drawOptions = {
radius: boxHeight * Math.SQRT2 / 2,
pointStyle: legendItem.pointStyle,
rotation: legendItem.rotation,
borderWidth: lineWidth
};
const centerX = rtlHelper.xPlus(x, boxWidth / 2);
const centerY = y + halfFontSize;
// Draw pointStyle as legend symbol
drawPointLegend(ctx, drawOptions, centerX, centerY, labelOpts.pointStyleWidth && boxWidth);
} else {
// Draw box as legend symbol
// Adjust position when boxHeight < fontSize (want it centered)
const yBoxTop = y + Math.max((fontSize - boxHeight) / 2, 0);
const xBoxLeft = rtlHelper.leftForLtr(x, boxWidth);
const borderRadius = toTRBLCorners(legendItem.borderRadius);
ctx.beginPath();
if (Object.values(borderRadius).some(v => v !== 0)) {
addRoundedRectPath(ctx, {
x: xBoxLeft,
y: yBoxTop,
w: boxWidth,
h: boxHeight,
radius: borderRadius,
});
} else {
ctx.rect(xBoxLeft, yBoxTop, boxWidth, boxHeight);
}
ctx.fill();
if (lineWidth !== 0) {
ctx.stroke();
}
}
ctx.restore();
};
const fillText = function(x, y, legendItem) {
renderText(ctx, legendItem.text, x, y + (itemHeight / 2), labelFont, {
strikethrough: legendItem.hidden,
textAlign: rtlHelper.textAlign(legendItem.textAlign)
});
};
// Horizontal
const isHorizontal = this.isHorizontal();
const titleHeight = this._computeTitleHeight();
if (isHorizontal) {
cursor = {
x: _alignStartEnd(align, this.left + padding, this.right - lineWidths[0]),
y: this.top + padding + titleHeight,
line: 0
};
} else {
cursor = {
x: this.left + padding,
y: _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - columnSizes[0].height),
line: 0
};
}
overrideTextDirection(this.ctx, opts.textDirection);
const lineHeight = itemHeight + padding;
this.legendItems.forEach((legendItem, i) => {
ctx.strokeStyle = legendItem.fontColor; // for strikethrough effect
ctx.fillStyle = legendItem.fontColor; // render in correct colour
const textWidth = ctx.measureText(legendItem.text).width;
const textAlign = rtlHelper.textAlign(legendItem.textAlign || (legendItem.textAlign = labelOpts.textAlign));
const width = boxWidth + halfFontSize + textWidth;
let x = cursor.x;
let y = cursor.y;
rtlHelper.setWidth(this.width);
if (isHorizontal) {
if (i > 0 && x + width + padding > this.right) {
y = cursor.y += lineHeight;
cursor.line++;
x = cursor.x = _alignStartEnd(align, this.left + padding, this.right - lineWidths[cursor.line]);
}
} else if (i > 0 && y + lineHeight > this.bottom) {
x = cursor.x = x + columnSizes[cursor.line].width + padding;
cursor.line++;
y = cursor.y = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - columnSizes[cursor.line].height);
}
const realX = rtlHelper.x(x);
drawLegendBox(realX, y, legendItem);
x = _textX(textAlign, x + boxWidth + halfFontSize, isHorizontal ? x + width : this.right, opts.rtl);
// Fill the actual label
fillText(rtlHelper.x(x), y, legendItem);
if (isHorizontal) {
cursor.x += width + padding;
} else if (typeof legendItem.text !== 'string') {
const fontLineHeight = labelFont.lineHeight;
cursor.y += calculateLegendItemHeight(legendItem, fontLineHeight) + padding;
} else {
cursor.y += lineHeight;
}
});
restoreTextDirection(this.ctx, opts.textDirection);
}
/**
* @protected
*/
drawTitle() {
const opts = this.options;
const titleOpts = opts.title;
const titleFont = toFont(titleOpts.font);
const titlePadding = toPadding(titleOpts.padding);
if (!titleOpts.display) {
return;
}
const rtlHelper = getRtlAdapter(opts.rtl, this.left, this.width);
const ctx = this.ctx;
const position = titleOpts.position;
const halfFontSize = titleFont.size / 2;
const topPaddingPlusHalfFontSize = titlePadding.top + halfFontSize;
let y;
// These defaults are used when the legend is vertical.
// When horizontal, they are computed below.
let left = this.left;
let maxWidth = this.width;
if (this.isHorizontal()) {
// Move left / right so that the title is above the legend lines
maxWidth = Math.max(...this.lineWidths);
y = this.top + topPaddingPlusHalfFontSize;
left = _alignStartEnd(opts.align, left, this.right - maxWidth);
} else {
// Move down so that the title is above the legend stack in every alignment
const maxHeight = this.columnSizes.reduce((acc, size) => Math.max(acc, size.height), 0);
y = topPaddingPlusHalfFontSize + _alignStartEnd(opts.align, this.top, this.bottom - maxHeight - opts.labels.padding - this._computeTitleHeight());
}
// Now that we know the left edge of the inner legend box, compute the correct
// X coordinate from the title alignment
const x = _alignStartEnd(position, left, left + maxWidth);
// Canvas setup
ctx.textAlign = rtlHelper.textAlign(_toLeftRightCenter(position));
ctx.textBaseline = 'middle';
ctx.strokeStyle = titleOpts.color;
ctx.fillStyle = titleOpts.color;
ctx.font = titleFont.string;
renderText(ctx, titleOpts.text, x, y, titleFont);
}
/**
* @private
*/
_computeTitleHeight() {
const titleOpts = this.options.title;
const titleFont = toFont(titleOpts.font);
const titlePadding = toPadding(titleOpts.padding);
return titleOpts.display ? titleFont.lineHeight + titlePadding.height : 0;
}
/**
* @private
*/
_getLegendItemAt(x, y) {
let i, hitBox, lh;
if (_isBetween(x, this.left, this.right)
&& _isBetween(y, this.top, this.bottom)) {
// See if we are touching one of the dataset boxes
lh = this.legendHitBoxes;
for (i = 0; i < lh.length; ++i) {
hitBox = lh[i];
if (_isBetween(x, hitBox.left, hitBox.left + hitBox.width)
&& _isBetween(y, hitBox.top, hitBox.top + hitBox.height)) {
// Touching an element
return this.legendItems[i];
}
}
}
return null;
}
/**
* Handle an event
* @param {ChartEvent} e - The event to handle
*/
handleEvent(e) {
const opts = this.options;
if (!isListened(e.type, opts)) {
return;
}
// Chart event already has relative position in it
const hoveredItem = this._getLegendItemAt(e.x, e.y);
if (e.type === 'mousemove' || e.type === 'mouseout') {
const previous = this._hoveredItem;
const sameItem = itemsEqual(previous, hoveredItem);
if (previous && !sameItem) {
call(opts.onLeave, [e, previous, this], this);
}
this._hoveredItem = hoveredItem;
if (hoveredItem && !sameItem) {
call(opts.onHover, [e, hoveredItem, this], this);
}
} else if (hoveredItem) {
call(opts.onClick, [e, hoveredItem, this], this);
}
}
}
function calculateItemSize(boxWidth, labelFont, ctx, legendItem, _itemHeight) {
const itemWidth = calculateItemWidth(legendItem, boxWidth, labelFont, ctx);
const itemHeight = calculateItemHeight(_itemHeight, legendItem, labelFont.lineHeight);
return {itemWidth, itemHeight};
}
function calculateItemWidth(legendItem, boxWidth, labelFont, ctx) {
let legendItemText = legendItem.text;
if (legendItemText && typeof legendItemText !== 'string') {
legendItemText = legendItemText.reduce((a, b) => a.length > b.length ? a : b);
}
return boxWidth + (labelFont.size / 2) + ctx.measureText(legendItemText).width;
}
function calculateItemHeight(_itemHeight, legendItem, fontLineHeight) {
let itemHeight = _itemHeight;
if (typeof legendItem.text !== 'string') {
itemHeight = calculateLegendItemHeight(legendItem, fontLineHeight);
}
return itemHeight;
}
function calculateLegendItemHeight(legendItem, fontLineHeight) {
const labelHeight = legendItem.text ? legendItem.text.length : 0;
return fontLineHeight * labelHeight;
}
function isListened(type, opts) {
if ((type === 'mousemove' || type === 'mouseout') && (opts.onHover || opts.onLeave)) {
return true;
}
if (opts.onClick && (type === 'click' || type === 'mouseup')) {
return true;
}
return false;
}
export default {
id: 'legend',
/**
* For tests
* @private
*/
_element: Legend,
start(chart, _args, options) {
const legend = chart.legend = new Legend({ctx: chart.ctx, options, chart});
layouts.configure(chart, legend, options);
layouts.addBox(chart, legend);
},
stop(chart) {
layouts.removeBox(chart, chart.legend);
delete chart.legend;
},
// During the beforeUpdate step, the layout configuration needs to run
// This ensures that if the legend position changes (via an option update)
// the layout system respects the change. See https://github.com/chartjs/Chart.js/issues/7527
beforeUpdate(chart, _args, options) {
const legend = chart.legend;
layouts.configure(chart, legend, options);
legend.options = options;
},
// The labels need to be built after datasets are updated to ensure that colors
// and other styling are correct. See https://github.com/chartjs/Chart.js/issues/6968
afterUpdate(chart) {
const legend = chart.legend;
legend.buildLabels();
legend.adjustHitBoxes();
},
afterEvent(chart, args) {
if (!args.replay) {
chart.legend.handleEvent(args.event);
}
},
defaults: {
display: true,
position: 'top',
align: 'center',
fullSize: true,
reverse: false,
weight: 1000,
// a callback that will handle
onClick(e, legendItem, legend) {
const index = legendItem.datasetIndex;
const ci = legend.chart;
if (ci.isDatasetVisible(index)) {
ci.hide(index);
legendItem.hidden = true;
} else {
ci.show(index);
legendItem.hidden = false;
}
},
onHover: null,
onLeave: null,
labels: {
color: (ctx) => ctx.chart.options.color,
boxWidth: 40,
padding: 10,
// Generates labels shown in the legend
// Valid properties to return:
// text : text to display
// fillStyle : fill of coloured box
// strokeStyle: stroke of coloured box
// hidden : if this legend item refers to a hidden item
// lineCap : cap style for line
// lineDash
// lineDashOffset :
// lineJoin :
// lineWidth :
generateLabels(chart) {
const datasets = chart.data.datasets;
const {labels: {usePointStyle, pointStyle, textAlign, color, useBorderRadius, borderRadius}} = chart.legend.options;
return chart._getSortedDatasetMetas().map((meta) => {
const style = meta.controller.getStyle(usePointStyle ? 0 : undefined);
const borderWidth = toPadding(style.borderWidth);
return {
text: datasets[meta.index].label,
fillStyle: style.backgroundColor,
fontColor: color,
hidden: !meta.visible,
lineCap: style.borderCapStyle,
lineDash: style.borderDash,
lineDashOffset: style.borderDashOffset,
lineJoin: style.borderJoinStyle,
lineWidth: (borderWidth.width + borderWidth.height) / 4,
strokeStyle: style.borderColor,
pointStyle: pointStyle || style.pointStyle,
rotation: style.rotation,
textAlign: textAlign || style.textAlign,
borderRadius: useBorderRadius && (borderRadius || style.borderRadius),
// Below is extra data used for toggling the datasets
datasetIndex: meta.index
};
}, this);
}
},
title: {
color: (ctx) => ctx.chart.options.color,
display: false,
position: 'center',
text: '',
}
},
descriptors: {
_scriptable: (name) => !name.startsWith('on'),
labels: {
_scriptable: (name) => !['generateLabels', 'filter', 'sort'].includes(name),
}
},
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.filler/index.js | src/plugins/plugin.filler/index.js | /**
* Plugin based on discussion from the following Chart.js issues:
* @see https://github.com/chartjs/Chart.js/issues/2380#issuecomment-279961569
* @see https://github.com/chartjs/Chart.js/issues/2440#issuecomment-256461897
*/
import LineElement from '../../elements/element.line.js';
import {_drawfill} from './filler.drawing.js';
import {_shouldApplyFill} from './filler.helper.js';
import {_decodeFill, _resolveTarget} from './filler.options.js';
export default {
id: 'filler',
afterDatasetsUpdate(chart, _args, options) {
const count = (chart.data.datasets || []).length;
const sources = [];
let meta, i, line, source;
for (i = 0; i < count; ++i) {
meta = chart.getDatasetMeta(i);
line = meta.dataset;
source = null;
if (line && line.options && line instanceof LineElement) {
source = {
visible: chart.isDatasetVisible(i),
index: i,
fill: _decodeFill(line, i, count),
chart,
axis: meta.controller.options.indexAxis,
scale: meta.vScale,
line,
};
}
meta.$filler = source;
sources.push(source);
}
for (i = 0; i < count; ++i) {
source = sources[i];
if (!source || source.fill === false) {
continue;
}
source.fill = _resolveTarget(sources, i, options.propagate);
}
},
beforeDraw(chart, _args, options) {
const draw = options.drawTime === 'beforeDraw';
const metasets = chart.getSortedVisibleDatasetMetas();
const area = chart.chartArea;
for (let i = metasets.length - 1; i >= 0; --i) {
const source = metasets[i].$filler;
if (!source) {
continue;
}
source.line.updateControlPoints(area, source.axis);
if (draw && source.fill) {
_drawfill(chart.ctx, source, area);
}
}
},
beforeDatasetsDraw(chart, _args, options) {
if (options.drawTime !== 'beforeDatasetsDraw') {
return;
}
const metasets = chart.getSortedVisibleDatasetMetas();
for (let i = metasets.length - 1; i >= 0; --i) {
const source = metasets[i].$filler;
if (_shouldApplyFill(source)) {
_drawfill(chart.ctx, source, chart.chartArea);
}
}
},
beforeDatasetDraw(chart, args, options) {
const source = args.meta.$filler;
if (!_shouldApplyFill(source) || options.drawTime !== 'beforeDatasetDraw') {
return;
}
_drawfill(chart.ctx, source, chart.chartArea);
},
defaults: {
propagate: true,
drawTime: 'beforeDatasetDraw'
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.filler/simpleArc.js | src/plugins/plugin.filler/simpleArc.js | import {TAU} from '../../helpers/index.js';
// TODO: use elements.ArcElement instead
export class simpleArc {
constructor(opts) {
this.x = opts.x;
this.y = opts.y;
this.radius = opts.radius;
}
pathSegment(ctx, bounds, opts) {
const {x, y, radius} = this;
bounds = bounds || {start: 0, end: TAU};
ctx.arc(x, y, radius, bounds.end, bounds.start, true);
return !opts.bounds;
}
interpolate(point) {
const {x, y, radius} = this;
const angle = point.angle;
return {
x: x + Math.cos(angle) * radius,
y: y + Math.sin(angle) * radius,
angle
};
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.filler/filler.drawing.js | src/plugins/plugin.filler/filler.drawing.js | import {clipArea, unclipArea, getDatasetClipArea} from '../../helpers/index.js';
import {_findSegmentEnd, _getBounds, _segments} from './filler.segment.js';
import {_getTarget} from './filler.target.js';
export function _drawfill(ctx, source, area) {
const target = _getTarget(source);
const {chart, index, line, scale, axis} = source;
const lineOpts = line.options;
const fillOption = lineOpts.fill;
const color = lineOpts.backgroundColor;
const {above = color, below = color} = fillOption || {};
const meta = chart.getDatasetMeta(index);
const clip = getDatasetClipArea(chart, meta);
if (target && line.points.length) {
clipArea(ctx, area);
doFill(ctx, {line, target, above, below, area, scale, axis, clip});
unclipArea(ctx);
}
}
function doFill(ctx, cfg) {
const {line, target, above, below, area, scale, clip} = cfg;
const property = line._loop ? 'angle' : cfg.axis;
ctx.save();
let fillColor = below;
if (below !== above) {
if (property === 'x') {
clipVertical(ctx, target, area.top);
fill(ctx, {line, target, color: above, scale, property, clip});
ctx.restore();
ctx.save();
clipVertical(ctx, target, area.bottom);
} else if (property === 'y') {
clipHorizontal(ctx, target, area.left);
fill(ctx, {line, target, color: below, scale, property, clip});
ctx.restore();
ctx.save();
clipHorizontal(ctx, target, area.right);
fillColor = above;
}
}
fill(ctx, {line, target, color: fillColor, scale, property, clip});
ctx.restore();
}
function clipVertical(ctx, target, clipY) {
const {segments, points} = target;
let first = true;
let lineLoop = false;
ctx.beginPath();
for (const segment of segments) {
const {start, end} = segment;
const firstPoint = points[start];
const lastPoint = points[_findSegmentEnd(start, end, points)];
if (first) {
ctx.moveTo(firstPoint.x, firstPoint.y);
first = false;
} else {
ctx.lineTo(firstPoint.x, clipY);
ctx.lineTo(firstPoint.x, firstPoint.y);
}
lineLoop = !!target.pathSegment(ctx, segment, {move: lineLoop});
if (lineLoop) {
ctx.closePath();
} else {
ctx.lineTo(lastPoint.x, clipY);
}
}
ctx.lineTo(target.first().x, clipY);
ctx.closePath();
ctx.clip();
}
function clipHorizontal(ctx, target, clipX) {
const {segments, points} = target;
let first = true;
let lineLoop = false;
ctx.beginPath();
for (const segment of segments) {
const {start, end} = segment;
const firstPoint = points[start];
const lastPoint = points[_findSegmentEnd(start, end, points)];
if (first) {
ctx.moveTo(firstPoint.x, firstPoint.y);
first = false;
} else {
ctx.lineTo(clipX, firstPoint.y);
ctx.lineTo(firstPoint.x, firstPoint.y);
}
lineLoop = !!target.pathSegment(ctx, segment, {move: lineLoop});
if (lineLoop) {
ctx.closePath();
} else {
ctx.lineTo(clipX, lastPoint.y);
}
}
ctx.lineTo(clipX, target.first().y);
ctx.closePath();
ctx.clip();
}
function fill(ctx, cfg) {
const {line, target, property, color, scale, clip} = cfg;
const segments = _segments(line, target, property);
for (const {source: src, target: tgt, start, end} of segments) {
const {style: {backgroundColor = color} = {}} = src;
const notShape = target !== true;
ctx.save();
ctx.fillStyle = backgroundColor;
clipBounds(ctx, scale, clip, notShape && _getBounds(property, start, end));
ctx.beginPath();
const lineLoop = !!line.pathSegment(ctx, src);
let loop;
if (notShape) {
if (lineLoop) {
ctx.closePath();
} else {
interpolatedLineTo(ctx, target, end, property);
}
const targetLoop = !!target.pathSegment(ctx, tgt, {move: lineLoop, reverse: true});
loop = lineLoop && targetLoop;
if (!loop) {
interpolatedLineTo(ctx, target, start, property);
}
}
ctx.closePath();
ctx.fill(loop ? 'evenodd' : 'nonzero');
ctx.restore();
}
}
function clipBounds(ctx, scale, clip, bounds) {
const chartArea = scale.chart.chartArea;
const {property, start, end} = bounds || {};
if (property === 'x' || property === 'y') {
let left, top, right, bottom;
if (property === 'x') {
left = start;
top = chartArea.top;
right = end;
bottom = chartArea.bottom;
} else {
left = chartArea.left;
top = start;
right = chartArea.right;
bottom = end;
}
ctx.beginPath();
if (clip) {
left = Math.max(left, clip.left);
right = Math.min(right, clip.right);
top = Math.max(top, clip.top);
bottom = Math.min(bottom, clip.bottom);
}
ctx.rect(left, top, right - left, bottom - top);
ctx.clip();
}
}
function interpolatedLineTo(ctx, target, point, property) {
const interpolatedPoint = target.interpolate(point, property);
if (interpolatedPoint) {
ctx.lineTo(interpolatedPoint.x, interpolatedPoint.y);
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.filler/filler.options.js | src/plugins/plugin.filler/filler.options.js | import {isObject, isFinite, valueOrDefault} from '../../helpers/helpers.core.js';
/**
* @typedef { import('../../core/core.scale.js').default } Scale
* @typedef { import('../../elements/element.line.js').default } LineElement
* @typedef { import('../../types/index.js').FillTarget } FillTarget
* @typedef { import('../../types/index.js').ComplexFillTarget } ComplexFillTarget
*/
export function _resolveTarget(sources, index, propagate) {
const source = sources[index];
let fill = source.fill;
const visited = [index];
let target;
if (!propagate) {
return fill;
}
while (fill !== false && visited.indexOf(fill) === -1) {
if (!isFinite(fill)) {
return fill;
}
target = sources[fill];
if (!target) {
return false;
}
if (target.visible) {
return fill;
}
visited.push(fill);
fill = target.fill;
}
return false;
}
/**
* @param {LineElement} line
* @param {number} index
* @param {number} count
*/
export function _decodeFill(line, index, count) {
/** @type {string | {value: number}} */
const fill = parseFillOption(line);
if (isObject(fill)) {
return isNaN(fill.value) ? false : fill;
}
let target = parseFloat(fill);
if (isFinite(target) && Math.floor(target) === target) {
return decodeTargetIndex(fill[0], index, target, count);
}
return ['origin', 'start', 'end', 'stack', 'shape'].indexOf(fill) >= 0 && fill;
}
function decodeTargetIndex(firstCh, index, target, count) {
if (firstCh === '-' || firstCh === '+') {
target = index + target;
}
if (target === index || target < 0 || target >= count) {
return false;
}
return target;
}
/**
* @param {FillTarget | ComplexFillTarget} fill
* @param {Scale} scale
* @returns {number | null}
*/
export function _getTargetPixel(fill, scale) {
let pixel = null;
if (fill === 'start') {
pixel = scale.bottom;
} else if (fill === 'end') {
pixel = scale.top;
} else if (isObject(fill)) {
// @ts-ignore
pixel = scale.getPixelForValue(fill.value);
} else if (scale.getBasePixel) {
pixel = scale.getBasePixel();
}
return pixel;
}
/**
* @param {FillTarget | ComplexFillTarget} fill
* @param {Scale} scale
* @param {number} startValue
* @returns {number | undefined}
*/
export function _getTargetValue(fill, scale, startValue) {
let value;
if (fill === 'start') {
value = startValue;
} else if (fill === 'end') {
value = scale.options.reverse ? scale.min : scale.max;
} else if (isObject(fill)) {
// @ts-ignore
value = fill.value;
} else {
value = scale.getBaseValue();
}
return value;
}
/**
* @param {LineElement} line
*/
function parseFillOption(line) {
const options = line.options;
const fillOption = options.fill;
let fill = valueOrDefault(fillOption && fillOption.target, fillOption);
if (fill === undefined) {
fill = !!options.backgroundColor;
}
if (fill === false || fill === null) {
return false;
}
if (fill === true) {
return 'origin';
}
return fill;
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.filler/filler.target.js | src/plugins/plugin.filler/filler.target.js | import {isFinite} from '../../helpers/index.js';
import {_createBoundaryLine} from './filler.helper.js';
import {_getTargetPixel, _getTargetValue} from './filler.options.js';
import {_buildStackLine} from './filler.target.stack.js';
import {simpleArc} from './simpleArc.js';
/**
* @typedef { import('../../core/core.controller.js').default } Chart
* @typedef { import('../../core/core.scale.js').default } Scale
* @typedef { import('../../elements/element.point.js').default } PointElement
*/
export function _getTarget(source) {
const {chart, fill, line} = source;
if (isFinite(fill)) {
return getLineByIndex(chart, fill);
}
if (fill === 'stack') {
return _buildStackLine(source);
}
if (fill === 'shape') {
return true;
}
const boundary = computeBoundary(source);
if (boundary instanceof simpleArc) {
return boundary;
}
return _createBoundaryLine(boundary, line);
}
/**
* @param {Chart} chart
* @param {number} index
*/
function getLineByIndex(chart, index) {
const meta = chart.getDatasetMeta(index);
const visible = meta && chart.isDatasetVisible(index);
return visible ? meta.dataset : null;
}
function computeBoundary(source) {
const scale = source.scale || {};
if (scale.getPointPositionForValue) {
return computeCircularBoundary(source);
}
return computeLinearBoundary(source);
}
function computeLinearBoundary(source) {
const {scale = {}, fill} = source;
const pixel = _getTargetPixel(fill, scale);
if (isFinite(pixel)) {
const horizontal = scale.isHorizontal();
return {
x: horizontal ? pixel : null,
y: horizontal ? null : pixel
};
}
return null;
}
function computeCircularBoundary(source) {
const {scale, fill} = source;
const options = scale.options;
const length = scale.getLabels().length;
const start = options.reverse ? scale.max : scale.min;
const value = _getTargetValue(fill, scale, start);
const target = [];
if (options.grid.circular) {
const center = scale.getPointPositionForValue(0, start);
return new simpleArc({
x: center.x,
y: center.y,
radius: scale.getDistanceFromCenterForValue(value)
});
}
for (let i = 0; i < length; ++i) {
target.push(scale.getPointPositionForValue(i, value));
}
return target;
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.filler/filler.helper.js | src/plugins/plugin.filler/filler.helper.js | /**
* @typedef { import('../../core/core.controller.js').default } Chart
* @typedef { import('../../core/core.scale.js').default } Scale
* @typedef { import('../../elements/element.point.js').default } PointElement
*/
import {LineElement} from '../../elements/index.js';
import {isArray} from '../../helpers/index.js';
import {_pointsFromSegments} from './filler.segment.js';
/**
* @param {PointElement[] | { x: number; y: number; }} boundary
* @param {LineElement} line
* @return {LineElement?}
*/
export function _createBoundaryLine(boundary, line) {
let points = [];
let _loop = false;
if (isArray(boundary)) {
_loop = true;
// @ts-ignore
points = boundary;
} else {
points = _pointsFromSegments(boundary, line);
}
return points.length ? new LineElement({
points,
options: {tension: 0},
_loop,
_fullLoop: _loop
}) : null;
}
export function _shouldApplyFill(source) {
return source && source.fill !== false;
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.filler/filler.segment.js | src/plugins/plugin.filler/filler.segment.js | import {_boundSegment, _boundSegments, _normalizeAngle} from '../../helpers/index.js';
export function _segments(line, target, property) {
const segments = line.segments;
const points = line.points;
const tpoints = target.points;
const parts = [];
for (const segment of segments) {
let {start, end} = segment;
end = _findSegmentEnd(start, end, points);
const bounds = _getBounds(property, points[start], points[end], segment.loop);
if (!target.segments) {
// Special case for boundary not supporting `segments` (simpleArc)
// Bounds are provided as `target` for partial circle, or undefined for full circle
parts.push({
source: segment,
target: bounds,
start: points[start],
end: points[end]
});
continue;
}
// Get all segments from `target` that intersect the bounds of current segment of `line`
const targetSegments = _boundSegments(target, bounds);
for (const tgt of targetSegments) {
const subBounds = _getBounds(property, tpoints[tgt.start], tpoints[tgt.end], tgt.loop);
const fillSources = _boundSegment(segment, points, subBounds);
for (const fillSource of fillSources) {
parts.push({
source: fillSource,
target: tgt,
start: {
[property]: _getEdge(bounds, subBounds, 'start', Math.max)
},
end: {
[property]: _getEdge(bounds, subBounds, 'end', Math.min)
}
});
}
}
}
return parts;
}
export function _getBounds(property, first, last, loop) {
if (loop) {
return;
}
let start = first[property];
let end = last[property];
if (property === 'angle') {
start = _normalizeAngle(start);
end = _normalizeAngle(end);
}
return {property, start, end};
}
export function _pointsFromSegments(boundary, line) {
const {x = null, y = null} = boundary || {};
const linePoints = line.points;
const points = [];
line.segments.forEach(({start, end}) => {
end = _findSegmentEnd(start, end, linePoints);
const first = linePoints[start];
const last = linePoints[end];
if (y !== null) {
points.push({x: first.x, y});
points.push({x: last.x, y});
} else if (x !== null) {
points.push({x, y: first.y});
points.push({x, y: last.y});
}
});
return points;
}
export function _findSegmentEnd(start, end, points) {
for (;end > start; end--) {
const point = points[end];
if (!isNaN(point.x) && !isNaN(point.y)) {
break;
}
}
return end;
}
function _getEdge(a, b, prop, fn) {
if (a && b) {
return fn(a[prop], b[prop]);
}
return a ? a[prop] : b ? b[prop] : 0;
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/plugins/plugin.filler/filler.target.stack.js | src/plugins/plugin.filler/filler.target.stack.js | /**
* @typedef { import('../../core/core.controller.js').default } Chart
* @typedef { import('../../core/core.scale.js').default } Scale
* @typedef { import('../../elements/element.point.js').default } PointElement
*/
import {LineElement} from '../../elements/index.js';
import {_isBetween} from '../../helpers/index.js';
import {_createBoundaryLine} from './filler.helper.js';
/**
* @param {{ chart: Chart; scale: Scale; index: number; line: LineElement; }} source
* @return {LineElement}
*/
export function _buildStackLine(source) {
const {scale, index, line} = source;
const points = [];
const segments = line.segments;
const sourcePoints = line.points;
const linesBelow = getLinesBelow(scale, index);
linesBelow.push(_createBoundaryLine({x: null, y: scale.bottom}, line));
for (let i = 0; i < segments.length; i++) {
const segment = segments[i];
for (let j = segment.start; j <= segment.end; j++) {
addPointsBelow(points, sourcePoints[j], linesBelow);
}
}
return new LineElement({points, options: {}});
}
/**
* @param {Scale} scale
* @param {number} index
* @return {LineElement[]}
*/
function getLinesBelow(scale, index) {
const below = [];
const metas = scale.getMatchingVisibleMetas('line');
for (let i = 0; i < metas.length; i++) {
const meta = metas[i];
if (meta.index === index) {
break;
}
if (!meta.hidden) {
below.unshift(meta.dataset);
}
}
return below;
}
/**
* @param {PointElement[]} points
* @param {PointElement} sourcePoint
* @param {LineElement[]} linesBelow
*/
function addPointsBelow(points, sourcePoint, linesBelow) {
const postponed = [];
for (let j = 0; j < linesBelow.length; j++) {
const line = linesBelow[j];
const {first, last, point} = findPoint(line, sourcePoint, 'x');
if (!point || (first && last)) {
continue;
}
if (first) {
// First point of a segment -> need to add another point before this,
postponed.unshift(point);
} else {
points.push(point);
if (!last) {
// In the middle of a segment, no need to add more points.
break;
}
}
}
points.push(...postponed);
}
/**
* @param {LineElement} line
* @param {PointElement} sourcePoint
* @param {string} property
* @returns {{point?: PointElement, first?: boolean, last?: boolean}}
*/
function findPoint(line, sourcePoint, property) {
const point = line.interpolate(sourcePoint, property);
if (!point) {
return {};
}
const pointValue = point[property];
const segments = line.segments;
const linePoints = line.points;
let first = false;
let last = false;
for (let i = 0; i < segments.length; i++) {
const segment = segments[i];
const firstValue = linePoints[segment.start][property];
const lastValue = linePoints[segment.end][property];
if (_isBetween(pointValue, firstValue, lastValue)) {
first = pointValue === firstValue;
last = pointValue === lastValue;
break;
}
}
return {first, last, point};
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.defaults.js | src/core/core.defaults.js | import {getHoverColor} from '../helpers/helpers.color.js';
import {isObject, merge, valueOrDefault} from '../helpers/helpers.core.js';
import {applyAnimationsDefaults} from './core.animations.defaults.js';
import {applyLayoutsDefaults} from './core.layouts.defaults.js';
import {applyScaleDefaults} from './core.scale.defaults.js';
export const overrides = Object.create(null);
export const descriptors = Object.create(null);
/**
* @param {object} node
* @param {string} key
* @return {object}
*/
function getScope(node, key) {
if (!key) {
return node;
}
const keys = key.split('.');
for (let i = 0, n = keys.length; i < n; ++i) {
const k = keys[i];
node = node[k] || (node[k] = Object.create(null));
}
return node;
}
function set(root, scope, values) {
if (typeof scope === 'string') {
return merge(getScope(root, scope), values);
}
return merge(getScope(root, ''), scope);
}
/**
* Please use the module's default export which provides a singleton instance
* Note: class is exported for typedoc
*/
export class Defaults {
constructor(_descriptors, _appliers) {
this.animation = undefined;
this.backgroundColor = 'rgba(0,0,0,0.1)';
this.borderColor = 'rgba(0,0,0,0.1)';
this.color = '#666';
this.datasets = {};
this.devicePixelRatio = (context) => context.chart.platform.getDevicePixelRatio();
this.elements = {};
this.events = [
'mousemove',
'mouseout',
'click',
'touchstart',
'touchmove'
];
this.font = {
family: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
size: 12,
style: 'normal',
lineHeight: 1.2,
weight: null
};
this.hover = {};
this.hoverBackgroundColor = (ctx, options) => getHoverColor(options.backgroundColor);
this.hoverBorderColor = (ctx, options) => getHoverColor(options.borderColor);
this.hoverColor = (ctx, options) => getHoverColor(options.color);
this.indexAxis = 'x';
this.interaction = {
mode: 'nearest',
intersect: true,
includeInvisible: false
};
this.maintainAspectRatio = true;
this.onHover = null;
this.onClick = null;
this.parsing = true;
this.plugins = {};
this.responsive = true;
this.scale = undefined;
this.scales = {};
this.showLine = true;
this.drawActiveElementsOnTop = true;
this.describe(_descriptors);
this.apply(_appliers);
}
/**
* @param {string|object} scope
* @param {object} [values]
*/
set(scope, values) {
return set(this, scope, values);
}
/**
* @param {string} scope
*/
get(scope) {
return getScope(this, scope);
}
/**
* @param {string|object} scope
* @param {object} [values]
*/
describe(scope, values) {
return set(descriptors, scope, values);
}
override(scope, values) {
return set(overrides, scope, values);
}
/**
* Routes the named defaults to fallback to another scope/name.
* This routing is useful when those target values, like defaults.color, are changed runtime.
* If the values would be copied, the runtime change would not take effect. By routing, the
* fallback is evaluated at each access, so its always up to date.
*
* Example:
*
* defaults.route('elements.arc', 'backgroundColor', '', 'color')
* - reads the backgroundColor from defaults.color when undefined locally
*
* @param {string} scope Scope this route applies to.
* @param {string} name Property name that should be routed to different namespace when not defined here.
* @param {string} targetScope The namespace where those properties should be routed to.
* Empty string ('') is the root of defaults.
* @param {string} targetName The target name in the target scope the property should be routed to.
*/
route(scope, name, targetScope, targetName) {
const scopeObject = getScope(this, scope);
const targetScopeObject = getScope(this, targetScope);
const privateName = '_' + name;
Object.defineProperties(scopeObject, {
// A private property is defined to hold the actual value, when this property is set in its scope (set in the setter)
[privateName]: {
value: scopeObject[name],
writable: true
},
// The actual property is defined as getter/setter so we can do the routing when value is not locally set.
[name]: {
enumerable: true,
get() {
const local = this[privateName];
const target = targetScopeObject[targetName];
if (isObject(local)) {
return Object.assign({}, target, local);
}
return valueOrDefault(local, target);
},
set(value) {
this[privateName] = value;
}
}
});
}
apply(appliers) {
appliers.forEach((apply) => apply(this));
}
}
// singleton instance
export default /* #__PURE__ */ new Defaults({
_scriptable: (name) => !name.startsWith('on'),
_indexable: (name) => name !== 'events',
hover: {
_fallback: 'interaction'
},
interaction: {
_scriptable: false,
_indexable: false,
}
}, [applyAnimationsDefaults, applyLayoutsDefaults, applyScaleDefaults]);
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.scale.js | src/core/core.scale.js | import Element from './core.element.js';
import {_alignPixel, _measureText, renderText, clipArea, unclipArea} from '../helpers/helpers.canvas.js';
import {callback as call, each, finiteOrDefault, isArray, isFinite, isNullOrUndef, isObject, valueOrDefault} from '../helpers/helpers.core.js';
import {toDegrees, toRadians, _int16Range, _limitValue, HALF_PI} from '../helpers/helpers.math.js';
import {_alignStartEnd, _toLeftRightCenter} from '../helpers/helpers.extras.js';
import {createContext, toFont, toPadding, _addGrace} from '../helpers/helpers.options.js';
import {autoSkip} from './core.scale.autoskip.js';
const reverseAlign = (align) => align === 'left' ? 'right' : align === 'right' ? 'left' : align;
const offsetFromEdge = (scale, edge, offset) => edge === 'top' || edge === 'left' ? scale[edge] + offset : scale[edge] - offset;
const getTicksLimit = (ticksLength, maxTicksLimit) => Math.min(maxTicksLimit || ticksLength, ticksLength);
/**
* @typedef { import('../types/index.js').Chart } Chart
* @typedef {{value:number | string, label?:string, major?:boolean, $context?:any}} Tick
*/
/**
* Returns a new array containing numItems from arr
* @param {any[]} arr
* @param {number} numItems
*/
function sample(arr, numItems) {
const result = [];
const increment = arr.length / numItems;
const len = arr.length;
let i = 0;
for (; i < len; i += increment) {
result.push(arr[Math.floor(i)]);
}
return result;
}
/**
* @param {Scale} scale
* @param {number} index
* @param {boolean} offsetGridLines
*/
function getPixelForGridLine(scale, index, offsetGridLines) {
const length = scale.ticks.length;
const validIndex = Math.min(index, length - 1);
const start = scale._startPixel;
const end = scale._endPixel;
const epsilon = 1e-6; // 1e-6 is margin in pixels for accumulated error.
let lineValue = scale.getPixelForTick(validIndex);
let offset;
if (offsetGridLines) {
if (length === 1) {
offset = Math.max(lineValue - start, end - lineValue);
} else if (index === 0) {
offset = (scale.getPixelForTick(1) - lineValue) / 2;
} else {
offset = (lineValue - scale.getPixelForTick(validIndex - 1)) / 2;
}
lineValue += validIndex < index ? offset : -offset;
// Return undefined if the pixel is out of the range
if (lineValue < start - epsilon || lineValue > end + epsilon) {
return;
}
}
return lineValue;
}
/**
* @param {object} caches
* @param {number} length
*/
function garbageCollect(caches, length) {
each(caches, (cache) => {
const gc = cache.gc;
const gcLen = gc.length / 2;
let i;
if (gcLen > length) {
for (i = 0; i < gcLen; ++i) {
delete cache.data[gc[i]];
}
gc.splice(0, gcLen);
}
});
}
/**
* @param {object} options
*/
function getTickMarkLength(options) {
return options.drawTicks ? options.tickLength : 0;
}
/**
* @param {object} options
*/
function getTitleHeight(options, fallback) {
if (!options.display) {
return 0;
}
const font = toFont(options.font, fallback);
const padding = toPadding(options.padding);
const lines = isArray(options.text) ? options.text.length : 1;
return (lines * font.lineHeight) + padding.height;
}
function createScaleContext(parent, scale) {
return createContext(parent, {
scale,
type: 'scale'
});
}
function createTickContext(parent, index, tick) {
return createContext(parent, {
tick,
index,
type: 'tick'
});
}
function titleAlign(align, position, reverse) {
/** @type {CanvasTextAlign} */
let ret = _toLeftRightCenter(align);
if ((reverse && position !== 'right') || (!reverse && position === 'right')) {
ret = reverseAlign(ret);
}
return ret;
}
function titleArgs(scale, offset, position, align) {
const {top, left, bottom, right, chart} = scale;
const {chartArea, scales} = chart;
let rotation = 0;
let maxWidth, titleX, titleY;
const height = bottom - top;
const width = right - left;
if (scale.isHorizontal()) {
titleX = _alignStartEnd(align, left, right);
if (isObject(position)) {
const positionAxisID = Object.keys(position)[0];
const value = position[positionAxisID];
titleY = scales[positionAxisID].getPixelForValue(value) + height - offset;
} else if (position === 'center') {
titleY = (chartArea.bottom + chartArea.top) / 2 + height - offset;
} else {
titleY = offsetFromEdge(scale, position, offset);
}
maxWidth = right - left;
} else {
if (isObject(position)) {
const positionAxisID = Object.keys(position)[0];
const value = position[positionAxisID];
titleX = scales[positionAxisID].getPixelForValue(value) - width + offset;
} else if (position === 'center') {
titleX = (chartArea.left + chartArea.right) / 2 - width + offset;
} else {
titleX = offsetFromEdge(scale, position, offset);
}
titleY = _alignStartEnd(align, bottom, top);
rotation = position === 'left' ? -HALF_PI : HALF_PI;
}
return {titleX, titleY, maxWidth, rotation};
}
export default class Scale extends Element {
// eslint-disable-next-line max-statements
constructor(cfg) {
super();
/** @type {string} */
this.id = cfg.id;
/** @type {string} */
this.type = cfg.type;
/** @type {any} */
this.options = undefined;
/** @type {CanvasRenderingContext2D} */
this.ctx = cfg.ctx;
/** @type {Chart} */
this.chart = cfg.chart;
// implements box
/** @type {number} */
this.top = undefined;
/** @type {number} */
this.bottom = undefined;
/** @type {number} */
this.left = undefined;
/** @type {number} */
this.right = undefined;
/** @type {number} */
this.width = undefined;
/** @type {number} */
this.height = undefined;
this._margins = {
left: 0,
right: 0,
top: 0,
bottom: 0
};
/** @type {number} */
this.maxWidth = undefined;
/** @type {number} */
this.maxHeight = undefined;
/** @type {number} */
this.paddingTop = undefined;
/** @type {number} */
this.paddingBottom = undefined;
/** @type {number} */
this.paddingLeft = undefined;
/** @type {number} */
this.paddingRight = undefined;
// scale-specific properties
/** @type {string=} */
this.axis = undefined;
/** @type {number=} */
this.labelRotation = undefined;
this.min = undefined;
this.max = undefined;
this._range = undefined;
/** @type {Tick[]} */
this.ticks = [];
/** @type {object[]|null} */
this._gridLineItems = null;
/** @type {object[]|null} */
this._labelItems = null;
/** @type {object|null} */
this._labelSizes = null;
this._length = 0;
this._maxLength = 0;
this._longestTextCache = {};
/** @type {number} */
this._startPixel = undefined;
/** @type {number} */
this._endPixel = undefined;
this._reversePixels = false;
this._userMax = undefined;
this._userMin = undefined;
this._suggestedMax = undefined;
this._suggestedMin = undefined;
this._ticksLength = 0;
this._borderValue = 0;
this._cache = {};
this._dataLimitsCached = false;
this.$context = undefined;
}
/**
* @param {any} options
* @since 3.0
*/
init(options) {
this.options = options.setContext(this.getContext());
this.axis = options.axis;
// parse min/max value, so we can properly determine min/max for other scales
this._userMin = this.parse(options.min);
this._userMax = this.parse(options.max);
this._suggestedMin = this.parse(options.suggestedMin);
this._suggestedMax = this.parse(options.suggestedMax);
}
/**
* Parse a supported input value to internal representation.
* @param {*} raw
* @param {number} [index]
* @since 3.0
*/
parse(raw, index) { // eslint-disable-line no-unused-vars
return raw;
}
/**
* @return {{min: number, max: number, minDefined: boolean, maxDefined: boolean}}
* @protected
* @since 3.0
*/
getUserBounds() {
let {_userMin, _userMax, _suggestedMin, _suggestedMax} = this;
_userMin = finiteOrDefault(_userMin, Number.POSITIVE_INFINITY);
_userMax = finiteOrDefault(_userMax, Number.NEGATIVE_INFINITY);
_suggestedMin = finiteOrDefault(_suggestedMin, Number.POSITIVE_INFINITY);
_suggestedMax = finiteOrDefault(_suggestedMax, Number.NEGATIVE_INFINITY);
return {
min: finiteOrDefault(_userMin, _suggestedMin),
max: finiteOrDefault(_userMax, _suggestedMax),
minDefined: isFinite(_userMin),
maxDefined: isFinite(_userMax)
};
}
/**
* @param {boolean} canStack
* @return {{min: number, max: number}}
* @protected
* @since 3.0
*/
getMinMax(canStack) {
let {min, max, minDefined, maxDefined} = this.getUserBounds();
let range;
if (minDefined && maxDefined) {
return {min, max};
}
const metas = this.getMatchingVisibleMetas();
for (let i = 0, ilen = metas.length; i < ilen; ++i) {
range = metas[i].controller.getMinMax(this, canStack);
if (!minDefined) {
min = Math.min(min, range.min);
}
if (!maxDefined) {
max = Math.max(max, range.max);
}
}
// Make sure min <= max when only min or max is defined by user and the data is outside that range
min = maxDefined && min > max ? max : min;
max = minDefined && min > max ? min : max;
return {
min: finiteOrDefault(min, finiteOrDefault(max, min)),
max: finiteOrDefault(max, finiteOrDefault(min, max))
};
}
/**
* Get the padding needed for the scale
* @return {{top: number, left: number, bottom: number, right: number}} the necessary padding
* @private
*/
getPadding() {
return {
left: this.paddingLeft || 0,
top: this.paddingTop || 0,
right: this.paddingRight || 0,
bottom: this.paddingBottom || 0
};
}
/**
* Returns the scale tick objects
* @return {Tick[]}
* @since 2.7
*/
getTicks() {
return this.ticks;
}
/**
* @return {string[]}
*/
getLabels() {
const data = this.chart.data;
return this.options.labels || (this.isHorizontal() ? data.xLabels : data.yLabels) || data.labels || [];
}
/**
* @return {import('../types.js').LabelItem[]}
*/
getLabelItems(chartArea = this.chart.chartArea) {
const items = this._labelItems || (this._labelItems = this._computeLabelItems(chartArea));
return items;
}
// When a new layout is created, reset the data limits cache
beforeLayout() {
this._cache = {};
this._dataLimitsCached = false;
}
// These methods are ordered by lifecycle. Utilities then follow.
// Any function defined here is inherited by all scale types.
// Any function can be extended by the scale type
beforeUpdate() {
call(this.options.beforeUpdate, [this]);
}
/**
* @param {number} maxWidth - the max width in pixels
* @param {number} maxHeight - the max height in pixels
* @param {{top: number, left: number, bottom: number, right: number}} margins - the space between the edge of the other scales and edge of the chart
* This space comes from two sources:
* - padding - space that's required to show the labels at the edges of the scale
* - thickness of scales or legends in another orientation
*/
update(maxWidth, maxHeight, margins) {
const {beginAtZero, grace, ticks: tickOpts} = this.options;
const sampleSize = tickOpts.sampleSize;
// Update Lifecycle - Probably don't want to ever extend or overwrite this function ;)
this.beforeUpdate();
// Absorb the master measurements
this.maxWidth = maxWidth;
this.maxHeight = maxHeight;
this._margins = margins = Object.assign({
left: 0,
right: 0,
top: 0,
bottom: 0
}, margins);
this.ticks = null;
this._labelSizes = null;
this._gridLineItems = null;
this._labelItems = null;
// Dimensions
this.beforeSetDimensions();
this.setDimensions();
this.afterSetDimensions();
this._maxLength = this.isHorizontal()
? this.width + margins.left + margins.right
: this.height + margins.top + margins.bottom;
// Data min/max
if (!this._dataLimitsCached) {
this.beforeDataLimits();
this.determineDataLimits();
this.afterDataLimits();
this._range = _addGrace(this, grace, beginAtZero);
this._dataLimitsCached = true;
}
this.beforeBuildTicks();
this.ticks = this.buildTicks() || [];
// Allow modification of ticks in callback.
this.afterBuildTicks();
// Compute tick rotation and fit using a sampled subset of labels
// We generally don't need to compute the size of every single label for determining scale size
const samplingEnabled = sampleSize < this.ticks.length;
this._convertTicksToLabels(samplingEnabled ? sample(this.ticks, sampleSize) : this.ticks);
// configure is called twice, once here, once from core.controller.updateLayout.
// Here we haven't been positioned yet, but dimensions are correct.
// Variables set in configure are needed for calculateLabelRotation, and
// it's ok that coordinates are not correct there, only dimensions matter.
this.configure();
// Tick Rotation
this.beforeCalculateLabelRotation();
this.calculateLabelRotation(); // Preconditions: number of ticks and sizes of largest labels must be calculated beforehand
this.afterCalculateLabelRotation();
// Auto-skip
if (tickOpts.display && (tickOpts.autoSkip || tickOpts.source === 'auto')) {
this.ticks = autoSkip(this, this.ticks);
this._labelSizes = null;
this.afterAutoSkip();
}
if (samplingEnabled) {
// Generate labels using all non-skipped ticks
this._convertTicksToLabels(this.ticks);
}
this.beforeFit();
this.fit(); // Preconditions: label rotation and label sizes must be calculated beforehand
this.afterFit();
// IMPORTANT: after this point, we consider that `this.ticks` will NEVER change!
this.afterUpdate();
}
/**
* @protected
*/
configure() {
let reversePixels = this.options.reverse;
let startPixel, endPixel;
if (this.isHorizontal()) {
startPixel = this.left;
endPixel = this.right;
} else {
startPixel = this.top;
endPixel = this.bottom;
// by default vertical scales are from bottom to top, so pixels are reversed
reversePixels = !reversePixels;
}
this._startPixel = startPixel;
this._endPixel = endPixel;
this._reversePixels = reversePixels;
this._length = endPixel - startPixel;
this._alignToPixels = this.options.alignToPixels;
}
afterUpdate() {
call(this.options.afterUpdate, [this]);
}
//
beforeSetDimensions() {
call(this.options.beforeSetDimensions, [this]);
}
setDimensions() {
// Set the unconstrained dimension before label rotation
if (this.isHorizontal()) {
// Reset position before calculating rotation
this.width = this.maxWidth;
this.left = 0;
this.right = this.width;
} else {
this.height = this.maxHeight;
// Reset position before calculating rotation
this.top = 0;
this.bottom = this.height;
}
// Reset padding
this.paddingLeft = 0;
this.paddingTop = 0;
this.paddingRight = 0;
this.paddingBottom = 0;
}
afterSetDimensions() {
call(this.options.afterSetDimensions, [this]);
}
_callHooks(name) {
this.chart.notifyPlugins(name, this.getContext());
call(this.options[name], [this]);
}
// Data limits
beforeDataLimits() {
this._callHooks('beforeDataLimits');
}
determineDataLimits() {}
afterDataLimits() {
this._callHooks('afterDataLimits');
}
//
beforeBuildTicks() {
this._callHooks('beforeBuildTicks');
}
/**
* @return {object[]} the ticks
*/
buildTicks() {
return [];
}
afterBuildTicks() {
this._callHooks('afterBuildTicks');
}
beforeTickToLabelConversion() {
call(this.options.beforeTickToLabelConversion, [this]);
}
/**
* Convert ticks to label strings
* @param {Tick[]} ticks
*/
generateTickLabels(ticks) {
const tickOpts = this.options.ticks;
let i, ilen, tick;
for (i = 0, ilen = ticks.length; i < ilen; i++) {
tick = ticks[i];
tick.label = call(tickOpts.callback, [tick.value, i, ticks], this);
}
}
afterTickToLabelConversion() {
call(this.options.afterTickToLabelConversion, [this]);
}
//
beforeCalculateLabelRotation() {
call(this.options.beforeCalculateLabelRotation, [this]);
}
calculateLabelRotation() {
const options = this.options;
const tickOpts = options.ticks;
const numTicks = getTicksLimit(this.ticks.length, options.ticks.maxTicksLimit);
const minRotation = tickOpts.minRotation || 0;
const maxRotation = tickOpts.maxRotation;
let labelRotation = minRotation;
let tickWidth, maxHeight, maxLabelDiagonal;
if (!this._isVisible() || !tickOpts.display || minRotation >= maxRotation || numTicks <= 1 || !this.isHorizontal()) {
this.labelRotation = minRotation;
return;
}
const labelSizes = this._getLabelSizes();
const maxLabelWidth = labelSizes.widest.width;
const maxLabelHeight = labelSizes.highest.height;
// Estimate the width of each grid based on the canvas width, the maximum
// label width and the number of tick intervals
const maxWidth = _limitValue(this.chart.width - maxLabelWidth, 0, this.maxWidth);
tickWidth = options.offset ? this.maxWidth / numTicks : maxWidth / (numTicks - 1);
// Allow 3 pixels x2 padding either side for label readability
if (maxLabelWidth + 6 > tickWidth) {
tickWidth = maxWidth / (numTicks - (options.offset ? 0.5 : 1));
maxHeight = this.maxHeight - getTickMarkLength(options.grid)
- tickOpts.padding - getTitleHeight(options.title, this.chart.options.font);
maxLabelDiagonal = Math.sqrt(maxLabelWidth * maxLabelWidth + maxLabelHeight * maxLabelHeight);
labelRotation = toDegrees(Math.min(
Math.asin(_limitValue((labelSizes.highest.height + 6) / tickWidth, -1, 1)),
Math.asin(_limitValue(maxHeight / maxLabelDiagonal, -1, 1)) - Math.asin(_limitValue(maxLabelHeight / maxLabelDiagonal, -1, 1))
));
labelRotation = Math.max(minRotation, Math.min(maxRotation, labelRotation));
}
this.labelRotation = labelRotation;
}
afterCalculateLabelRotation() {
call(this.options.afterCalculateLabelRotation, [this]);
}
afterAutoSkip() {}
//
beforeFit() {
call(this.options.beforeFit, [this]);
}
fit() {
// Reset
const minSize = {
width: 0,
height: 0
};
const {chart, options: {ticks: tickOpts, title: titleOpts, grid: gridOpts}} = this;
const display = this._isVisible();
const isHorizontal = this.isHorizontal();
if (display) {
const titleHeight = getTitleHeight(titleOpts, chart.options.font);
if (isHorizontal) {
minSize.width = this.maxWidth;
minSize.height = getTickMarkLength(gridOpts) + titleHeight;
} else {
minSize.height = this.maxHeight; // fill all the height
minSize.width = getTickMarkLength(gridOpts) + titleHeight;
}
// Don't bother fitting the ticks if we are not showing the labels
if (tickOpts.display && this.ticks.length) {
const {first, last, widest, highest} = this._getLabelSizes();
const tickPadding = tickOpts.padding * 2;
const angleRadians = toRadians(this.labelRotation);
const cos = Math.cos(angleRadians);
const sin = Math.sin(angleRadians);
if (isHorizontal) {
// A horizontal axis is more constrained by the height.
const labelHeight = tickOpts.mirror ? 0 : sin * widest.width + cos * highest.height;
minSize.height = Math.min(this.maxHeight, minSize.height + labelHeight + tickPadding);
} else {
// A vertical axis is more constrained by the width. Labels are the
// dominant factor here, so get that length first and account for padding
const labelWidth = tickOpts.mirror ? 0 : cos * widest.width + sin * highest.height;
minSize.width = Math.min(this.maxWidth, minSize.width + labelWidth + tickPadding);
}
this._calculatePadding(first, last, sin, cos);
}
}
this._handleMargins();
if (isHorizontal) {
this.width = this._length = chart.width - this._margins.left - this._margins.right;
this.height = minSize.height;
} else {
this.width = minSize.width;
this.height = this._length = chart.height - this._margins.top - this._margins.bottom;
}
}
_calculatePadding(first, last, sin, cos) {
const {ticks: {align, padding}, position} = this.options;
const isRotated = this.labelRotation !== 0;
const labelsBelowTicks = position !== 'top' && this.axis === 'x';
if (this.isHorizontal()) {
const offsetLeft = this.getPixelForTick(0) - this.left;
const offsetRight = this.right - this.getPixelForTick(this.ticks.length - 1);
let paddingLeft = 0;
let paddingRight = 0;
// Ensure that our ticks are always inside the canvas. When rotated, ticks are right aligned
// which means that the right padding is dominated by the font height
if (isRotated) {
if (labelsBelowTicks) {
paddingLeft = cos * first.width;
paddingRight = sin * last.height;
} else {
paddingLeft = sin * first.height;
paddingRight = cos * last.width;
}
} else if (align === 'start') {
paddingRight = last.width;
} else if (align === 'end') {
paddingLeft = first.width;
} else if (align !== 'inner') {
paddingLeft = first.width / 2;
paddingRight = last.width / 2;
}
// Adjust padding taking into account changes in offsets
this.paddingLeft = Math.max((paddingLeft - offsetLeft + padding) * this.width / (this.width - offsetLeft), 0);
this.paddingRight = Math.max((paddingRight - offsetRight + padding) * this.width / (this.width - offsetRight), 0);
} else {
let paddingTop = last.height / 2;
let paddingBottom = first.height / 2;
if (align === 'start') {
paddingTop = 0;
paddingBottom = first.height;
} else if (align === 'end') {
paddingTop = last.height;
paddingBottom = 0;
}
this.paddingTop = paddingTop + padding;
this.paddingBottom = paddingBottom + padding;
}
}
/**
* Handle margins and padding interactions
* @private
*/
_handleMargins() {
if (this._margins) {
this._margins.left = Math.max(this.paddingLeft, this._margins.left);
this._margins.top = Math.max(this.paddingTop, this._margins.top);
this._margins.right = Math.max(this.paddingRight, this._margins.right);
this._margins.bottom = Math.max(this.paddingBottom, this._margins.bottom);
}
}
afterFit() {
call(this.options.afterFit, [this]);
}
// Shared Methods
/**
* @return {boolean}
*/
isHorizontal() {
const {axis, position} = this.options;
return position === 'top' || position === 'bottom' || axis === 'x';
}
/**
* @return {boolean}
*/
isFullSize() {
return this.options.fullSize;
}
/**
* @param {Tick[]} ticks
* @private
*/
_convertTicksToLabels(ticks) {
this.beforeTickToLabelConversion();
this.generateTickLabels(ticks);
// Ticks should be skipped when callback returns null or undef, so lets remove those.
let i, ilen;
for (i = 0, ilen = ticks.length; i < ilen; i++) {
if (isNullOrUndef(ticks[i].label)) {
ticks.splice(i, 1);
ilen--;
i--;
}
}
this.afterTickToLabelConversion();
}
/**
* @return {{ first: object, last: object, widest: object, highest: object, widths: Array, heights: array }}
* @private
*/
_getLabelSizes() {
let labelSizes = this._labelSizes;
if (!labelSizes) {
const sampleSize = this.options.ticks.sampleSize;
let ticks = this.ticks;
if (sampleSize < ticks.length) {
ticks = sample(ticks, sampleSize);
}
this._labelSizes = labelSizes = this._computeLabelSizes(ticks, ticks.length, this.options.ticks.maxTicksLimit);
}
return labelSizes;
}
/**
* Returns {width, height, offset} objects for the first, last, widest, highest tick
* labels where offset indicates the anchor point offset from the top in pixels.
* @return {{ first: object, last: object, widest: object, highest: object, widths: Array, heights: array }}
* @private
*/
_computeLabelSizes(ticks, length, maxTicksLimit) {
const {ctx, _longestTextCache: caches} = this;
const widths = [];
const heights = [];
const increment = Math.floor(length / getTicksLimit(length, maxTicksLimit));
let widestLabelSize = 0;
let highestLabelSize = 0;
let i, j, jlen, label, tickFont, fontString, cache, lineHeight, width, height, nestedLabel;
for (i = 0; i < length; i += increment) {
label = ticks[i].label;
tickFont = this._resolveTickFontOptions(i);
ctx.font = fontString = tickFont.string;
cache = caches[fontString] = caches[fontString] || {data: {}, gc: []};
lineHeight = tickFont.lineHeight;
width = height = 0;
// Undefined labels and arrays should not be measured
if (!isNullOrUndef(label) && !isArray(label)) {
width = _measureText(ctx, cache.data, cache.gc, width, label);
height = lineHeight;
} else if (isArray(label)) {
// if it is an array let's measure each element
for (j = 0, jlen = label.length; j < jlen; ++j) {
nestedLabel = /** @type {string} */ (label[j]);
// Undefined labels and arrays should not be measured
if (!isNullOrUndef(nestedLabel) && !isArray(nestedLabel)) {
width = _measureText(ctx, cache.data, cache.gc, width, nestedLabel);
height += lineHeight;
}
}
}
widths.push(width);
heights.push(height);
widestLabelSize = Math.max(width, widestLabelSize);
highestLabelSize = Math.max(height, highestLabelSize);
}
garbageCollect(caches, length);
const widest = widths.indexOf(widestLabelSize);
const highest = heights.indexOf(highestLabelSize);
const valueAt = (idx) => ({width: widths[idx] || 0, height: heights[idx] || 0});
return {
first: valueAt(0),
last: valueAt(length - 1),
widest: valueAt(widest),
highest: valueAt(highest),
widths,
heights,
};
}
/**
* Used to get the label to display in the tooltip for the given value
* @param {*} value
* @return {string}
*/
getLabelForValue(value) {
return value;
}
/**
* Returns the location of the given data point. Value can either be an index or a numerical value
* The coordinate (0, 0) is at the upper-left corner of the canvas
* @param {*} value
* @param {number} [index]
* @return {number}
*/
getPixelForValue(value, index) { // eslint-disable-line no-unused-vars
return NaN;
}
/**
* Used to get the data value from a given pixel. This is the inverse of getPixelForValue
* The coordinate (0, 0) is at the upper-left corner of the canvas
* @param {number} pixel
* @return {*}
*/
getValueForPixel(pixel) {} // eslint-disable-line no-unused-vars
/**
* Returns the location of the tick at the given index
* The coordinate (0, 0) is at the upper-left corner of the canvas
* @param {number} index
* @return {number}
*/
getPixelForTick(index) {
const ticks = this.ticks;
if (index < 0 || index > ticks.length - 1) {
return null;
}
return this.getPixelForValue(ticks[index].value);
}
/**
* Utility for getting the pixel location of a percentage of scale
* The coordinate (0, 0) is at the upper-left corner of the canvas
* @param {number} decimal
* @return {number}
*/
getPixelForDecimal(decimal) {
if (this._reversePixels) {
decimal = 1 - decimal;
}
const pixel = this._startPixel + decimal * this._length;
return _int16Range(this._alignToPixels ? _alignPixel(this.chart, pixel, 0) : pixel);
}
/**
* @param {number} pixel
* @return {number}
*/
getDecimalForPixel(pixel) {
const decimal = (pixel - this._startPixel) / this._length;
return this._reversePixels ? 1 - decimal : decimal;
}
/**
* Returns the pixel for the minimum chart value
* The coordinate (0, 0) is at the upper-left corner of the canvas
* @return {number}
*/
getBasePixel() {
return this.getPixelForValue(this.getBaseValue());
}
/**
* @return {number}
*/
getBaseValue() {
const {min, max} = this;
return min < 0 && max < 0 ? max :
min > 0 && max > 0 ? min :
0;
}
/**
* @protected
*/
getContext(index) {
const ticks = this.ticks || [];
if (index >= 0 && index < ticks.length) {
const tick = ticks[index];
return tick.$context ||
(tick.$context = createTickContext(this.getContext(), index, tick));
}
return this.$context ||
(this.$context = createScaleContext(this.chart.getContext(), this));
}
/**
* @return {number}
* @private
*/
_tickSize() {
const optionTicks = this.options.ticks;
// Calculate space needed by label in axis direction.
const rot = toRadians(this.labelRotation);
const cos = Math.abs(Math.cos(rot));
const sin = Math.abs(Math.sin(rot));
const labelSizes = this._getLabelSizes();
const padding = optionTicks.autoSkipPadding || 0;
const w = labelSizes ? labelSizes.widest.width + padding : 0;
const h = labelSizes ? labelSizes.highest.height + padding : 0;
// Calculate space needed for 1 tick in axis direction.
return this.isHorizontal()
? h * cos > w * sin ? w / cos : h / sin
: h * sin < w * cos ? h / cos : w / sin;
}
/**
* @return {boolean}
* @private
*/
_isVisible() {
const display = this.options.display;
if (display !== 'auto') {
return !!display;
}
return this.getMatchingVisibleMetas().length > 0;
}
/**
* @private
*/
_computeGridLineItems(chartArea) {
const axis = this.axis;
const chart = this.chart;
const options = this.options;
const {grid, position, border} = options;
const offset = grid.offset;
const isHorizontal = this.isHorizontal();
const ticks = this.ticks;
const ticksLength = ticks.length + (offset ? 1 : 0);
const tl = getTickMarkLength(grid);
const items = [];
const borderOpts = border.setContext(this.getContext());
const axisWidth = borderOpts.display ? borderOpts.width : 0;
const axisHalfWidth = axisWidth / 2;
const alignBorderValue = function(pixel) {
return _alignPixel(chart, pixel, axisWidth);
};
let borderValue, i, lineValue, alignedLineValue;
let tx1, ty1, tx2, ty2, x1, y1, x2, y2;
if (position === 'top') {
borderValue = alignBorderValue(this.bottom);
ty1 = this.bottom - tl;
ty2 = borderValue - axisHalfWidth;
y1 = alignBorderValue(chartArea.top) + axisHalfWidth;
y2 = chartArea.bottom;
} else if (position === 'bottom') {
borderValue = alignBorderValue(this.top);
y1 = chartArea.top;
y2 = alignBorderValue(chartArea.bottom) - axisHalfWidth;
ty1 = borderValue + axisHalfWidth;
ty2 = this.top + tl;
} else if (position === 'left') {
borderValue = alignBorderValue(this.right);
tx1 = this.right - tl;
tx2 = borderValue - axisHalfWidth;
x1 = alignBorderValue(chartArea.left) + axisHalfWidth;
x2 = chartArea.right;
} else if (position === 'right') {
borderValue = alignBorderValue(this.left);
x1 = chartArea.left;
x2 = alignBorderValue(chartArea.right) - axisHalfWidth;
tx1 = borderValue + axisHalfWidth;
tx2 = this.left + tl;
} else if (axis === 'x') {
if (position === 'center') {
borderValue = alignBorderValue((chartArea.top + chartArea.bottom) / 2 + 0.5);
} else if (isObject(position)) {
const positionAxisID = Object.keys(position)[0];
const value = position[positionAxisID];
borderValue = alignBorderValue(this.chart.scales[positionAxisID].getPixelForValue(value));
}
y1 = chartArea.top;
y2 = chartArea.bottom;
ty1 = borderValue + axisHalfWidth;
ty2 = ty1 + tl;
} else if (axis === 'y') {
if (position === 'center') {
borderValue = alignBorderValue((chartArea.left + chartArea.right) / 2);
} else if (isObject(position)) {
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | true |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.layouts.js | src/core/core.layouts.js | import {defined, each, isObject} from '../helpers/helpers.core.js';
import {toPadding} from '../helpers/helpers.options.js';
/**
* @typedef { import('./core.controller.js').default } Chart
*/
const STATIC_POSITIONS = ['left', 'top', 'right', 'bottom'];
function filterByPosition(array, position) {
return array.filter(v => v.pos === position);
}
function filterDynamicPositionByAxis(array, axis) {
return array.filter(v => STATIC_POSITIONS.indexOf(v.pos) === -1 && v.box.axis === axis);
}
function sortByWeight(array, reverse) {
return array.sort((a, b) => {
const v0 = reverse ? b : a;
const v1 = reverse ? a : b;
return v0.weight === v1.weight ?
v0.index - v1.index :
v0.weight - v1.weight;
});
}
function wrapBoxes(boxes) {
const layoutBoxes = [];
let i, ilen, box, pos, stack, stackWeight;
for (i = 0, ilen = (boxes || []).length; i < ilen; ++i) {
box = boxes[i];
({position: pos, options: {stack, stackWeight = 1}} = box);
layoutBoxes.push({
index: i,
box,
pos,
horizontal: box.isHorizontal(),
weight: box.weight,
stack: stack && (pos + stack),
stackWeight
});
}
return layoutBoxes;
}
function buildStacks(layouts) {
const stacks = {};
for (const wrap of layouts) {
const {stack, pos, stackWeight} = wrap;
if (!stack || !STATIC_POSITIONS.includes(pos)) {
continue;
}
const _stack = stacks[stack] || (stacks[stack] = {count: 0, placed: 0, weight: 0, size: 0});
_stack.count++;
_stack.weight += stackWeight;
}
return stacks;
}
/**
* store dimensions used instead of available chartArea in fitBoxes
**/
function setLayoutDims(layouts, params) {
const stacks = buildStacks(layouts);
const {vBoxMaxWidth, hBoxMaxHeight} = params;
let i, ilen, layout;
for (i = 0, ilen = layouts.length; i < ilen; ++i) {
layout = layouts[i];
const {fullSize} = layout.box;
const stack = stacks[layout.stack];
const factor = stack && layout.stackWeight / stack.weight;
if (layout.horizontal) {
layout.width = factor ? factor * vBoxMaxWidth : fullSize && params.availableWidth;
layout.height = hBoxMaxHeight;
} else {
layout.width = vBoxMaxWidth;
layout.height = factor ? factor * hBoxMaxHeight : fullSize && params.availableHeight;
}
}
return stacks;
}
function buildLayoutBoxes(boxes) {
const layoutBoxes = wrapBoxes(boxes);
const fullSize = sortByWeight(layoutBoxes.filter(wrap => wrap.box.fullSize), true);
const left = sortByWeight(filterByPosition(layoutBoxes, 'left'), true);
const right = sortByWeight(filterByPosition(layoutBoxes, 'right'));
const top = sortByWeight(filterByPosition(layoutBoxes, 'top'), true);
const bottom = sortByWeight(filterByPosition(layoutBoxes, 'bottom'));
const centerHorizontal = filterDynamicPositionByAxis(layoutBoxes, 'x');
const centerVertical = filterDynamicPositionByAxis(layoutBoxes, 'y');
return {
fullSize,
leftAndTop: left.concat(top),
rightAndBottom: right.concat(centerVertical).concat(bottom).concat(centerHorizontal),
chartArea: filterByPosition(layoutBoxes, 'chartArea'),
vertical: left.concat(right).concat(centerVertical),
horizontal: top.concat(bottom).concat(centerHorizontal)
};
}
function getCombinedMax(maxPadding, chartArea, a, b) {
return Math.max(maxPadding[a], chartArea[a]) + Math.max(maxPadding[b], chartArea[b]);
}
function updateMaxPadding(maxPadding, boxPadding) {
maxPadding.top = Math.max(maxPadding.top, boxPadding.top);
maxPadding.left = Math.max(maxPadding.left, boxPadding.left);
maxPadding.bottom = Math.max(maxPadding.bottom, boxPadding.bottom);
maxPadding.right = Math.max(maxPadding.right, boxPadding.right);
}
function updateDims(chartArea, params, layout, stacks) {
const {pos, box} = layout;
const maxPadding = chartArea.maxPadding;
// dynamically placed boxes size is not considered
if (!isObject(pos)) {
if (layout.size) {
// this layout was already counted for, lets first reduce old size
chartArea[pos] -= layout.size;
}
const stack = stacks[layout.stack] || {size: 0, count: 1};
stack.size = Math.max(stack.size, layout.horizontal ? box.height : box.width);
layout.size = stack.size / stack.count;
chartArea[pos] += layout.size;
}
if (box.getPadding) {
updateMaxPadding(maxPadding, box.getPadding());
}
const newWidth = Math.max(0, params.outerWidth - getCombinedMax(maxPadding, chartArea, 'left', 'right'));
const newHeight = Math.max(0, params.outerHeight - getCombinedMax(maxPadding, chartArea, 'top', 'bottom'));
const widthChanged = newWidth !== chartArea.w;
const heightChanged = newHeight !== chartArea.h;
chartArea.w = newWidth;
chartArea.h = newHeight;
// return booleans on the changes per direction
return layout.horizontal
? {same: widthChanged, other: heightChanged}
: {same: heightChanged, other: widthChanged};
}
function handleMaxPadding(chartArea) {
const maxPadding = chartArea.maxPadding;
function updatePos(pos) {
const change = Math.max(maxPadding[pos] - chartArea[pos], 0);
chartArea[pos] += change;
return change;
}
chartArea.y += updatePos('top');
chartArea.x += updatePos('left');
updatePos('right');
updatePos('bottom');
}
function getMargins(horizontal, chartArea) {
const maxPadding = chartArea.maxPadding;
function marginForPositions(positions) {
const margin = {left: 0, top: 0, right: 0, bottom: 0};
positions.forEach((pos) => {
margin[pos] = Math.max(chartArea[pos], maxPadding[pos]);
});
return margin;
}
return horizontal
? marginForPositions(['left', 'right'])
: marginForPositions(['top', 'bottom']);
}
function fitBoxes(boxes, chartArea, params, stacks) {
const refitBoxes = [];
let i, ilen, layout, box, refit, changed;
for (i = 0, ilen = boxes.length, refit = 0; i < ilen; ++i) {
layout = boxes[i];
box = layout.box;
box.update(
layout.width || chartArea.w,
layout.height || chartArea.h,
getMargins(layout.horizontal, chartArea)
);
const {same, other} = updateDims(chartArea, params, layout, stacks);
// Dimensions changed and there were non full width boxes before this
// -> we have to refit those
refit |= same && refitBoxes.length;
// Chart area changed in the opposite direction
changed = changed || other;
if (!box.fullSize) { // fullSize boxes don't need to be re-fitted in any case
refitBoxes.push(layout);
}
}
return refit && fitBoxes(refitBoxes, chartArea, params, stacks) || changed;
}
function setBoxDims(box, left, top, width, height) {
box.top = top;
box.left = left;
box.right = left + width;
box.bottom = top + height;
box.width = width;
box.height = height;
}
function placeBoxes(boxes, chartArea, params, stacks) {
const userPadding = params.padding;
let {x, y} = chartArea;
for (const layout of boxes) {
const box = layout.box;
const stack = stacks[layout.stack] || {count: 1, placed: 0, weight: 1};
const weight = (layout.stackWeight / stack.weight) || 1;
if (layout.horizontal) {
const width = chartArea.w * weight;
const height = stack.size || box.height;
if (defined(stack.start)) {
y = stack.start;
}
if (box.fullSize) {
setBoxDims(box, userPadding.left, y, params.outerWidth - userPadding.right - userPadding.left, height);
} else {
setBoxDims(box, chartArea.left + stack.placed, y, width, height);
}
stack.start = y;
stack.placed += width;
y = box.bottom;
} else {
const height = chartArea.h * weight;
const width = stack.size || box.width;
if (defined(stack.start)) {
x = stack.start;
}
if (box.fullSize) {
setBoxDims(box, x, userPadding.top, width, params.outerHeight - userPadding.bottom - userPadding.top);
} else {
setBoxDims(box, x, chartArea.top + stack.placed, width, height);
}
stack.start = x;
stack.placed += height;
x = box.right;
}
}
chartArea.x = x;
chartArea.y = y;
}
/**
* @interface LayoutItem
* @typedef {object} LayoutItem
* @prop {string} position - The position of the item in the chart layout. Possible values are
* 'left', 'top', 'right', 'bottom', and 'chartArea'
* @prop {number} weight - The weight used to sort the item. Higher weights are further away from the chart area
* @prop {boolean} fullSize - if true, and the item is horizontal, then push vertical boxes down
* @prop {function} isHorizontal - returns true if the layout item is horizontal (ie. top or bottom)
* @prop {function} update - Takes two parameters: width and height. Returns size of item
* @prop {function} draw - Draws the element
* @prop {function} [getPadding] - Returns an object with padding on the edges
* @prop {number} width - Width of item. Must be valid after update()
* @prop {number} height - Height of item. Must be valid after update()
* @prop {number} left - Left edge of the item. Set by layout system and cannot be used in update
* @prop {number} top - Top edge of the item. Set by layout system and cannot be used in update
* @prop {number} right - Right edge of the item. Set by layout system and cannot be used in update
* @prop {number} bottom - Bottom edge of the item. Set by layout system and cannot be used in update
*/
// The layout service is very self explanatory. It's responsible for the layout within a chart.
// Scales, Legends and Plugins all rely on the layout service and can easily register to be placed anywhere they need
// It is this service's responsibility of carrying out that layout.
export default {
/**
* Register a box to a chart.
* A box is simply a reference to an object that requires layout. eg. Scales, Legend, Title.
* @param {Chart} chart - the chart to use
* @param {LayoutItem} item - the item to add to be laid out
*/
addBox(chart, item) {
if (!chart.boxes) {
chart.boxes = [];
}
// initialize item with default values
item.fullSize = item.fullSize || false;
item.position = item.position || 'top';
item.weight = item.weight || 0;
// @ts-ignore
item._layers = item._layers || function() {
return [{
z: 0,
draw(chartArea) {
item.draw(chartArea);
}
}];
};
chart.boxes.push(item);
},
/**
* Remove a layoutItem from a chart
* @param {Chart} chart - the chart to remove the box from
* @param {LayoutItem} layoutItem - the item to remove from the layout
*/
removeBox(chart, layoutItem) {
const index = chart.boxes ? chart.boxes.indexOf(layoutItem) : -1;
if (index !== -1) {
chart.boxes.splice(index, 1);
}
},
/**
* Sets (or updates) options on the given `item`.
* @param {Chart} chart - the chart in which the item lives (or will be added to)
* @param {LayoutItem} item - the item to configure with the given options
* @param {object} options - the new item options.
*/
configure(chart, item, options) {
item.fullSize = options.fullSize;
item.position = options.position;
item.weight = options.weight;
},
/**
* Fits boxes of the given chart into the given size by having each box measure itself
* then running a fitting algorithm
* @param {Chart} chart - the chart
* @param {number} width - the width to fit into
* @param {number} height - the height to fit into
* @param {number} minPadding - minimum padding required for each side of chart area
*/
update(chart, width, height, minPadding) {
if (!chart) {
return;
}
const padding = toPadding(chart.options.layout.padding);
const availableWidth = Math.max(width - padding.width, 0);
const availableHeight = Math.max(height - padding.height, 0);
const boxes = buildLayoutBoxes(chart.boxes);
const verticalBoxes = boxes.vertical;
const horizontalBoxes = boxes.horizontal;
// Before any changes are made, notify boxes that an update is about to being
// This is used to clear any cached data (e.g. scale limits)
each(chart.boxes, box => {
if (typeof box.beforeLayout === 'function') {
box.beforeLayout();
}
});
// Essentially we now have any number of boxes on each of the 4 sides.
// Our canvas looks like the following.
// The areas L1 and L2 are the left axes. R1 is the right axis, T1 is the top axis and
// B1 is the bottom axis
// There are also 4 quadrant-like locations (left to right instead of clockwise) reserved for chart overlays
// These locations are single-box locations only, when trying to register a chartArea location that is already taken,
// an error will be thrown.
//
// |----------------------------------------------------|
// | T1 (Full Width) |
// |----------------------------------------------------|
// | | | T2 | |
// | |----|-------------------------------------|----|
// | | | C1 | | C2 | |
// | | |----| |----| |
// | | | | |
// | L1 | L2 | ChartArea (C0) | R1 |
// | | | | |
// | | |----| |----| |
// | | | C3 | | C4 | |
// | |----|-------------------------------------|----|
// | | | B1 | |
// |----------------------------------------------------|
// | B2 (Full Width) |
// |----------------------------------------------------|
//
const visibleVerticalBoxCount = verticalBoxes.reduce((total, wrap) =>
wrap.box.options && wrap.box.options.display === false ? total : total + 1, 0) || 1;
const params = Object.freeze({
outerWidth: width,
outerHeight: height,
padding,
availableWidth,
availableHeight,
vBoxMaxWidth: availableWidth / 2 / visibleVerticalBoxCount,
hBoxMaxHeight: availableHeight / 2
});
const maxPadding = Object.assign({}, padding);
updateMaxPadding(maxPadding, toPadding(minPadding));
const chartArea = Object.assign({
maxPadding,
w: availableWidth,
h: availableHeight,
x: padding.left,
y: padding.top
}, padding);
const stacks = setLayoutDims(verticalBoxes.concat(horizontalBoxes), params);
// First fit the fullSize boxes, to reduce probability of re-fitting.
fitBoxes(boxes.fullSize, chartArea, params, stacks);
// Then fit vertical boxes
fitBoxes(verticalBoxes, chartArea, params, stacks);
// Then fit horizontal boxes
if (fitBoxes(horizontalBoxes, chartArea, params, stacks)) {
// if the area changed, re-fit vertical boxes
fitBoxes(verticalBoxes, chartArea, params, stacks);
}
handleMaxPadding(chartArea);
// Finally place the boxes to correct coordinates
placeBoxes(boxes.leftAndTop, chartArea, params, stacks);
// Move to opposite side of chart
chartArea.x += chartArea.w;
chartArea.y += chartArea.h;
placeBoxes(boxes.rightAndBottom, chartArea, params, stacks);
chart.chartArea = {
left: chartArea.left,
top: chartArea.top,
right: chartArea.left + chartArea.w,
bottom: chartArea.top + chartArea.h,
height: chartArea.h,
width: chartArea.w,
};
// Finally update boxes in chartArea (radial scale for example)
each(boxes.chartArea, (layout) => {
const box = layout.box;
Object.assign(box, chart.chartArea);
box.update(chartArea.w, chartArea.h, {left: 0, top: 0, right: 0, bottom: 0});
});
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.controller.js | src/core/core.controller.js | import animator from './core.animator.js';
import defaults, {overrides} from './core.defaults.js';
import Interaction from './core.interaction.js';
import layouts from './core.layouts.js';
import {_detectPlatform} from '../platform/index.js';
import PluginService from './core.plugins.js';
import registry from './core.registry.js';
import Config, {determineAxis, getIndexAxis} from './core.config.js';
import {each, callback as callCallback, uid, valueOrDefault, _elementsEqual, isNullOrUndef, setsEqual, defined, isFunction, _isClickEvent} from '../helpers/helpers.core.js';
import {clearCanvas, clipArea, createContext, unclipArea, _isPointInArea, _isDomSupported, retinaScale, getDatasetClipArea} from '../helpers/index.js';
// @ts-ignore
import {version} from '../../package.json';
import {debounce} from '../helpers/helpers.extras.js';
/**
* @typedef { import('../types/index.js').ChartEvent } ChartEvent
* @typedef { import('../types/index.js').Point } Point
*/
const KNOWN_POSITIONS = ['top', 'bottom', 'left', 'right', 'chartArea'];
function positionIsHorizontal(position, axis) {
return position === 'top' || position === 'bottom' || (KNOWN_POSITIONS.indexOf(position) === -1 && axis === 'x');
}
function compare2Level(l1, l2) {
return function(a, b) {
return a[l1] === b[l1]
? a[l2] - b[l2]
: a[l1] - b[l1];
};
}
function onAnimationsComplete(context) {
const chart = context.chart;
const animationOptions = chart.options.animation;
chart.notifyPlugins('afterRender');
callCallback(animationOptions && animationOptions.onComplete, [context], chart);
}
function onAnimationProgress(context) {
const chart = context.chart;
const animationOptions = chart.options.animation;
callCallback(animationOptions && animationOptions.onProgress, [context], chart);
}
/**
* Chart.js can take a string id of a canvas element, a 2d context, or a canvas element itself.
* Attempt to unwrap the item passed into the chart constructor so that it is a canvas element (if possible).
*/
function getCanvas(item) {
if (_isDomSupported() && typeof item === 'string') {
item = document.getElementById(item);
} else if (item && item.length) {
// Support for array based queries (such as jQuery)
item = item[0];
}
if (item && item.canvas) {
// Support for any object associated to a canvas (including a context2d)
item = item.canvas;
}
return item;
}
const instances = {};
const getChart = (key) => {
const canvas = getCanvas(key);
return Object.values(instances).filter((c) => c.canvas === canvas).pop();
};
function moveNumericKeys(obj, start, move) {
const keys = Object.keys(obj);
for (const key of keys) {
const intKey = +key;
if (intKey >= start) {
const value = obj[key];
delete obj[key];
if (move > 0 || intKey > start) {
obj[intKey + move] = value;
}
}
}
}
/**
* @param {ChartEvent} e
* @param {ChartEvent|null} lastEvent
* @param {boolean} inChartArea
* @param {boolean} isClick
* @returns {ChartEvent|null}
*/
function determineLastEvent(e, lastEvent, inChartArea, isClick) {
if (!inChartArea || e.type === 'mouseout') {
return null;
}
if (isClick) {
return lastEvent;
}
return e;
}
class Chart {
static defaults = defaults;
static instances = instances;
static overrides = overrides;
static registry = registry;
static version = version;
static getChart = getChart;
static register(...items) {
registry.add(...items);
invalidatePlugins();
}
static unregister(...items) {
registry.remove(...items);
invalidatePlugins();
}
// eslint-disable-next-line max-statements
constructor(item, userConfig) {
const config = this.config = new Config(userConfig);
const initialCanvas = getCanvas(item);
const existingChart = getChart(initialCanvas);
if (existingChart) {
throw new Error(
'Canvas is already in use. Chart with ID \'' + existingChart.id + '\'' +
' must be destroyed before the canvas with ID \'' + existingChart.canvas.id + '\' can be reused.'
);
}
const options = config.createResolver(config.chartOptionScopes(), this.getContext());
this.platform = new (config.platform || _detectPlatform(initialCanvas))();
this.platform.updateConfig(config);
const context = this.platform.acquireContext(initialCanvas, options.aspectRatio);
const canvas = context && context.canvas;
const height = canvas && canvas.height;
const width = canvas && canvas.width;
this.id = uid();
this.ctx = context;
this.canvas = canvas;
this.width = width;
this.height = height;
this._options = options;
// Store the previously used aspect ratio to determine if a resize
// is needed during updates. Do this after _options is set since
// aspectRatio uses a getter
this._aspectRatio = this.aspectRatio;
this._layers = [];
this._metasets = [];
this._stacks = undefined;
this.boxes = [];
this.currentDevicePixelRatio = undefined;
this.chartArea = undefined;
this._active = [];
this._lastEvent = undefined;
this._listeners = {};
/** @type {?{attach?: function, detach?: function, resize?: function}} */
this._responsiveListeners = undefined;
this._sortedMetasets = [];
this.scales = {};
this._plugins = new PluginService();
this.$proxies = {};
this._hiddenIndices = {};
this.attached = false;
this._animationsDisabled = undefined;
this.$context = undefined;
this._doResize = debounce(mode => this.update(mode), options.resizeDelay || 0);
this._dataChanges = [];
// Add the chart instance to the global namespace
instances[this.id] = this;
if (!context || !canvas) {
// The given item is not a compatible context2d element, let's return before finalizing
// the chart initialization but after setting basic chart / controller properties that
// can help to figure out that the chart is not valid (e.g chart.canvas !== null);
// https://github.com/chartjs/Chart.js/issues/2807
console.error("Failed to create chart: can't acquire context from the given item");
return;
}
animator.listen(this, 'complete', onAnimationsComplete);
animator.listen(this, 'progress', onAnimationProgress);
this._initialize();
if (this.attached) {
this.update();
}
}
get aspectRatio() {
const {options: {aspectRatio, maintainAspectRatio}, width, height, _aspectRatio} = this;
if (!isNullOrUndef(aspectRatio)) {
// If aspectRatio is defined in options, use that.
return aspectRatio;
}
if (maintainAspectRatio && _aspectRatio) {
// If maintainAspectRatio is truthly and we had previously determined _aspectRatio, use that
return _aspectRatio;
}
// Calculate
return height ? width / height : null;
}
get data() {
return this.config.data;
}
set data(data) {
this.config.data = data;
}
get options() {
return this._options;
}
set options(options) {
this.config.options = options;
}
get registry() {
return registry;
}
/**
* @private
*/
_initialize() {
// Before init plugin notification
this.notifyPlugins('beforeInit');
if (this.options.responsive) {
this.resize();
} else {
retinaScale(this, this.options.devicePixelRatio);
}
this.bindEvents();
// After init plugin notification
this.notifyPlugins('afterInit');
return this;
}
clear() {
clearCanvas(this.canvas, this.ctx);
return this;
}
stop() {
animator.stop(this);
return this;
}
/**
* Resize the chart to its container or to explicit dimensions.
* @param {number} [width]
* @param {number} [height]
*/
resize(width, height) {
if (!animator.running(this)) {
this._resize(width, height);
} else {
this._resizeBeforeDraw = {width, height};
}
}
_resize(width, height) {
const options = this.options;
const canvas = this.canvas;
const aspectRatio = options.maintainAspectRatio && this.aspectRatio;
const newSize = this.platform.getMaximumSize(canvas, width, height, aspectRatio);
const newRatio = options.devicePixelRatio || this.platform.getDevicePixelRatio();
const mode = this.width ? 'resize' : 'attach';
this.width = newSize.width;
this.height = newSize.height;
this._aspectRatio = this.aspectRatio;
if (!retinaScale(this, newRatio, true)) {
return;
}
this.notifyPlugins('resize', {size: newSize});
callCallback(options.onResize, [this, newSize], this);
if (this.attached) {
if (this._doResize(mode)) {
// The resize update is delayed, only draw without updating.
this.render();
}
}
}
ensureScalesHaveIDs() {
const options = this.options;
const scalesOptions = options.scales || {};
each(scalesOptions, (axisOptions, axisID) => {
axisOptions.id = axisID;
});
}
/**
* Builds a map of scale ID to scale object for future lookup.
*/
buildOrUpdateScales() {
const options = this.options;
const scaleOpts = options.scales;
const scales = this.scales;
const updated = Object.keys(scales).reduce((obj, id) => {
obj[id] = false;
return obj;
}, {});
let items = [];
if (scaleOpts) {
items = items.concat(
Object.keys(scaleOpts).map((id) => {
const scaleOptions = scaleOpts[id];
const axis = determineAxis(id, scaleOptions);
const isRadial = axis === 'r';
const isHorizontal = axis === 'x';
return {
options: scaleOptions,
dposition: isRadial ? 'chartArea' : isHorizontal ? 'bottom' : 'left',
dtype: isRadial ? 'radialLinear' : isHorizontal ? 'category' : 'linear'
};
})
);
}
each(items, (item) => {
const scaleOptions = item.options;
const id = scaleOptions.id;
const axis = determineAxis(id, scaleOptions);
const scaleType = valueOrDefault(scaleOptions.type, item.dtype);
if (scaleOptions.position === undefined || positionIsHorizontal(scaleOptions.position, axis) !== positionIsHorizontal(item.dposition)) {
scaleOptions.position = item.dposition;
}
updated[id] = true;
let scale = null;
if (id in scales && scales[id].type === scaleType) {
scale = scales[id];
} else {
const scaleClass = registry.getScale(scaleType);
scale = new scaleClass({
id,
type: scaleType,
ctx: this.ctx,
chart: this
});
scales[scale.id] = scale;
}
scale.init(scaleOptions, options);
});
// clear up discarded scales
each(updated, (hasUpdated, id) => {
if (!hasUpdated) {
delete scales[id];
}
});
each(scales, (scale) => {
layouts.configure(this, scale, scale.options);
layouts.addBox(this, scale);
});
}
/**
* @private
*/
_updateMetasets() {
const metasets = this._metasets;
const numData = this.data.datasets.length;
const numMeta = metasets.length;
metasets.sort((a, b) => a.index - b.index);
if (numMeta > numData) {
for (let i = numData; i < numMeta; ++i) {
this._destroyDatasetMeta(i);
}
metasets.splice(numData, numMeta - numData);
}
this._sortedMetasets = metasets.slice(0).sort(compare2Level('order', 'index'));
}
/**
* @private
*/
_removeUnreferencedMetasets() {
const {_metasets: metasets, data: {datasets}} = this;
if (metasets.length > datasets.length) {
delete this._stacks;
}
metasets.forEach((meta, index) => {
if (datasets.filter(x => x === meta._dataset).length === 0) {
this._destroyDatasetMeta(index);
}
});
}
buildOrUpdateControllers() {
const newControllers = [];
const datasets = this.data.datasets;
let i, ilen;
this._removeUnreferencedMetasets();
for (i = 0, ilen = datasets.length; i < ilen; i++) {
const dataset = datasets[i];
let meta = this.getDatasetMeta(i);
const type = dataset.type || this.config.type;
if (meta.type && meta.type !== type) {
this._destroyDatasetMeta(i);
meta = this.getDatasetMeta(i);
}
meta.type = type;
meta.indexAxis = dataset.indexAxis || getIndexAxis(type, this.options);
meta.order = dataset.order || 0;
meta.index = i;
meta.label = '' + dataset.label;
meta.visible = this.isDatasetVisible(i);
if (meta.controller) {
meta.controller.updateIndex(i);
meta.controller.linkScales();
} else {
const ControllerClass = registry.getController(type);
const {datasetElementType, dataElementType} = defaults.datasets[type];
Object.assign(ControllerClass, {
dataElementType: registry.getElement(dataElementType),
datasetElementType: datasetElementType && registry.getElement(datasetElementType)
});
meta.controller = new ControllerClass(this, i);
newControllers.push(meta.controller);
}
}
this._updateMetasets();
return newControllers;
}
/**
* Reset the elements of all datasets
* @private
*/
_resetElements() {
each(this.data.datasets, (dataset, datasetIndex) => {
this.getDatasetMeta(datasetIndex).controller.reset();
}, this);
}
/**
* Resets the chart back to its state before the initial animation
*/
reset() {
this._resetElements();
this.notifyPlugins('reset');
}
update(mode) {
const config = this.config;
config.update();
const options = this._options = config.createResolver(config.chartOptionScopes(), this.getContext());
const animsDisabled = this._animationsDisabled = !options.animation;
this._updateScales();
this._checkEventBindings();
this._updateHiddenIndices();
// plugins options references might have change, let's invalidate the cache
// https://github.com/chartjs/Chart.js/issues/5111#issuecomment-355934167
this._plugins.invalidate();
if (this.notifyPlugins('beforeUpdate', {mode, cancelable: true}) === false) {
return;
}
// Make sure dataset controllers are updated and new controllers are reset
const newControllers = this.buildOrUpdateControllers();
this.notifyPlugins('beforeElementsUpdate');
// Make sure all dataset controllers have correct meta data counts
let minPadding = 0;
for (let i = 0, ilen = this.data.datasets.length; i < ilen; i++) {
const {controller} = this.getDatasetMeta(i);
const reset = !animsDisabled && newControllers.indexOf(controller) === -1;
// New controllers will be reset after the layout pass, so we only want to modify
// elements added to new datasets
controller.buildOrUpdateElements(reset);
minPadding = Math.max(+controller.getMaxOverflow(), minPadding);
}
minPadding = this._minPadding = options.layout.autoPadding ? minPadding : 0;
this._updateLayout(minPadding);
// Only reset the controllers if we have animations
if (!animsDisabled) {
// Can only reset the new controllers after the scales have been updated
// Reset is done to get the starting point for the initial animation
each(newControllers, (controller) => {
controller.reset();
});
}
this._updateDatasets(mode);
// Do this before render so that any plugins that need final scale updates can use it
this.notifyPlugins('afterUpdate', {mode});
this._layers.sort(compare2Level('z', '_idx'));
// Replay last event from before update, or set hover styles on active elements
const {_active, _lastEvent} = this;
if (_lastEvent) {
this._eventHandler(_lastEvent, true);
} else if (_active.length) {
this._updateHoverStyles(_active, _active, true);
}
this.render();
}
/**
* @private
*/
_updateScales() {
each(this.scales, (scale) => {
layouts.removeBox(this, scale);
});
this.ensureScalesHaveIDs();
this.buildOrUpdateScales();
}
/**
* @private
*/
_checkEventBindings() {
const options = this.options;
const existingEvents = new Set(Object.keys(this._listeners));
const newEvents = new Set(options.events);
if (!setsEqual(existingEvents, newEvents) || !!this._responsiveListeners !== options.responsive) {
// The configured events have changed. Rebind.
this.unbindEvents();
this.bindEvents();
}
}
/**
* @private
*/
_updateHiddenIndices() {
const {_hiddenIndices} = this;
const changes = this._getUniformDataChanges() || [];
for (const {method, start, count} of changes) {
const move = method === '_removeElements' ? -count : count;
moveNumericKeys(_hiddenIndices, start, move);
}
}
/**
* @private
*/
_getUniformDataChanges() {
const _dataChanges = this._dataChanges;
if (!_dataChanges || !_dataChanges.length) {
return;
}
this._dataChanges = [];
const datasetCount = this.data.datasets.length;
const makeSet = (idx) => new Set(
_dataChanges
.filter(c => c[0] === idx)
.map((c, i) => i + ',' + c.splice(1).join(','))
);
const changeSet = makeSet(0);
for (let i = 1; i < datasetCount; i++) {
if (!setsEqual(changeSet, makeSet(i))) {
return;
}
}
return Array.from(changeSet)
.map(c => c.split(','))
.map(a => ({method: a[1], start: +a[2], count: +a[3]}));
}
/**
* Updates the chart layout unless a plugin returns `false` to the `beforeLayout`
* hook, in which case, plugins will not be called on `afterLayout`.
* @private
*/
_updateLayout(minPadding) {
if (this.notifyPlugins('beforeLayout', {cancelable: true}) === false) {
return;
}
layouts.update(this, this.width, this.height, minPadding);
const area = this.chartArea;
const noArea = area.width <= 0 || area.height <= 0;
this._layers = [];
each(this.boxes, (box) => {
if (noArea && box.position === 'chartArea') {
// Skip drawing and configuring chartArea boxes when chartArea is zero or negative
return;
}
// configure is called twice, once in core.scale.update and once here.
// Here the boxes are fully updated and at their final positions.
if (box.configure) {
box.configure();
}
this._layers.push(...box._layers());
}, this);
this._layers.forEach((item, index) => {
item._idx = index;
});
this.notifyPlugins('afterLayout');
}
/**
* Updates all datasets unless a plugin returns `false` to the `beforeDatasetsUpdate`
* hook, in which case, plugins will not be called on `afterDatasetsUpdate`.
* @private
*/
_updateDatasets(mode) {
if (this.notifyPlugins('beforeDatasetsUpdate', {mode, cancelable: true}) === false) {
return;
}
for (let i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {
this.getDatasetMeta(i).controller.configure();
}
for (let i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {
this._updateDataset(i, isFunction(mode) ? mode({datasetIndex: i}) : mode);
}
this.notifyPlugins('afterDatasetsUpdate', {mode});
}
/**
* Updates dataset at index unless a plugin returns `false` to the `beforeDatasetUpdate`
* hook, in which case, plugins will not be called on `afterDatasetUpdate`.
* @private
*/
_updateDataset(index, mode) {
const meta = this.getDatasetMeta(index);
const args = {meta, index, mode, cancelable: true};
if (this.notifyPlugins('beforeDatasetUpdate', args) === false) {
return;
}
meta.controller._update(mode);
args.cancelable = false;
this.notifyPlugins('afterDatasetUpdate', args);
}
render() {
if (this.notifyPlugins('beforeRender', {cancelable: true}) === false) {
return;
}
if (animator.has(this)) {
if (this.attached && !animator.running(this)) {
animator.start(this);
}
} else {
this.draw();
onAnimationsComplete({chart: this});
}
}
draw() {
let i;
if (this._resizeBeforeDraw) {
const {width, height} = this._resizeBeforeDraw;
// Unset pending resize request now to avoid possible recursion within _resize
this._resizeBeforeDraw = null;
this._resize(width, height);
}
this.clear();
if (this.width <= 0 || this.height <= 0) {
return;
}
if (this.notifyPlugins('beforeDraw', {cancelable: true}) === false) {
return;
}
// Because of plugin hooks (before/afterDatasetsDraw), datasets can't
// currently be part of layers. Instead, we draw
// layers <= 0 before(default, backward compat), and the rest after
const layers = this._layers;
for (i = 0; i < layers.length && layers[i].z <= 0; ++i) {
layers[i].draw(this.chartArea);
}
this._drawDatasets();
// Rest of layers
for (; i < layers.length; ++i) {
layers[i].draw(this.chartArea);
}
this.notifyPlugins('afterDraw');
}
/**
* @private
*/
_getSortedDatasetMetas(filterVisible) {
const metasets = this._sortedMetasets;
const result = [];
let i, ilen;
for (i = 0, ilen = metasets.length; i < ilen; ++i) {
const meta = metasets[i];
if (!filterVisible || meta.visible) {
result.push(meta);
}
}
return result;
}
/**
* Gets the visible dataset metas in drawing order
* @return {object[]}
*/
getSortedVisibleDatasetMetas() {
return this._getSortedDatasetMetas(true);
}
/**
* Draws all datasets unless a plugin returns `false` to the `beforeDatasetsDraw`
* hook, in which case, plugins will not be called on `afterDatasetsDraw`.
* @private
*/
_drawDatasets() {
if (this.notifyPlugins('beforeDatasetsDraw', {cancelable: true}) === false) {
return;
}
const metasets = this.getSortedVisibleDatasetMetas();
for (let i = metasets.length - 1; i >= 0; --i) {
this._drawDataset(metasets[i]);
}
this.notifyPlugins('afterDatasetsDraw');
}
/**
* Draws dataset at index unless a plugin returns `false` to the `beforeDatasetDraw`
* hook, in which case, plugins will not be called on `afterDatasetDraw`.
* @private
*/
_drawDataset(meta) {
const ctx = this.ctx;
const args = {
meta,
index: meta.index,
cancelable: true
};
// @ts-expect-error
const clip = getDatasetClipArea(this, meta);
if (this.notifyPlugins('beforeDatasetDraw', args) === false) {
return;
}
if (clip) {
clipArea(ctx, clip);
}
meta.controller.draw();
if (clip) {
unclipArea(ctx);
}
args.cancelable = false;
this.notifyPlugins('afterDatasetDraw', args);
}
/**
* Checks whether the given point is in the chart area.
* @param {Point} point - in relative coordinates (see, e.g., getRelativePosition)
* @returns {boolean}
*/
isPointInArea(point) {
return _isPointInArea(point, this.chartArea, this._minPadding);
}
getElementsAtEventForMode(e, mode, options, useFinalPosition) {
const method = Interaction.modes[mode];
if (typeof method === 'function') {
return method(this, e, options, useFinalPosition);
}
return [];
}
getDatasetMeta(datasetIndex) {
const dataset = this.data.datasets[datasetIndex];
const metasets = this._metasets;
let meta = metasets.filter(x => x && x._dataset === dataset).pop();
if (!meta) {
meta = {
type: null,
data: [],
dataset: null,
controller: null,
hidden: null, // See isDatasetVisible() comment
xAxisID: null,
yAxisID: null,
order: dataset && dataset.order || 0,
index: datasetIndex,
_dataset: dataset,
_parsed: [],
_sorted: false
};
metasets.push(meta);
}
return meta;
}
getContext() {
return this.$context || (this.$context = createContext(null, {chart: this, type: 'chart'}));
}
getVisibleDatasetCount() {
return this.getSortedVisibleDatasetMetas().length;
}
isDatasetVisible(datasetIndex) {
const dataset = this.data.datasets[datasetIndex];
if (!dataset) {
return false;
}
const meta = this.getDatasetMeta(datasetIndex);
// meta.hidden is a per chart dataset hidden flag override with 3 states: if true or false,
// the dataset.hidden value is ignored, else if null, the dataset hidden state is returned.
return typeof meta.hidden === 'boolean' ? !meta.hidden : !dataset.hidden;
}
setDatasetVisibility(datasetIndex, visible) {
const meta = this.getDatasetMeta(datasetIndex);
meta.hidden = !visible;
}
toggleDataVisibility(index) {
this._hiddenIndices[index] = !this._hiddenIndices[index];
}
getDataVisibility(index) {
return !this._hiddenIndices[index];
}
/**
* @private
*/
_updateVisibility(datasetIndex, dataIndex, visible) {
const mode = visible ? 'show' : 'hide';
const meta = this.getDatasetMeta(datasetIndex);
const anims = meta.controller._resolveAnimations(undefined, mode);
if (defined(dataIndex)) {
meta.data[dataIndex].hidden = !visible;
this.update();
} else {
this.setDatasetVisibility(datasetIndex, visible);
// Animate visible state, so hide animation can be seen. This could be handled better if update / updateDataset returned a Promise.
anims.update(meta, {visible});
this.update((ctx) => ctx.datasetIndex === datasetIndex ? mode : undefined);
}
}
hide(datasetIndex, dataIndex) {
this._updateVisibility(datasetIndex, dataIndex, false);
}
show(datasetIndex, dataIndex) {
this._updateVisibility(datasetIndex, dataIndex, true);
}
/**
* @private
*/
_destroyDatasetMeta(datasetIndex) {
const meta = this._metasets[datasetIndex];
if (meta && meta.controller) {
meta.controller._destroy();
}
delete this._metasets[datasetIndex];
}
_stop() {
let i, ilen;
this.stop();
animator.remove(this);
for (i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {
this._destroyDatasetMeta(i);
}
}
destroy() {
this.notifyPlugins('beforeDestroy');
const {canvas, ctx} = this;
this._stop();
this.config.clearCache();
if (canvas) {
this.unbindEvents();
clearCanvas(canvas, ctx);
this.platform.releaseContext(ctx);
this.canvas = null;
this.ctx = null;
}
delete instances[this.id];
this.notifyPlugins('afterDestroy');
}
toBase64Image(...args) {
return this.canvas.toDataURL(...args);
}
/**
* @private
*/
bindEvents() {
this.bindUserEvents();
if (this.options.responsive) {
this.bindResponsiveEvents();
} else {
this.attached = true;
}
}
/**
* @private
*/
bindUserEvents() {
const listeners = this._listeners;
const platform = this.platform;
const _add = (type, listener) => {
platform.addEventListener(this, type, listener);
listeners[type] = listener;
};
const listener = (e, x, y) => {
e.offsetX = x;
e.offsetY = y;
this._eventHandler(e);
};
each(this.options.events, (type) => _add(type, listener));
}
/**
* @private
*/
bindResponsiveEvents() {
if (!this._responsiveListeners) {
this._responsiveListeners = {};
}
const listeners = this._responsiveListeners;
const platform = this.platform;
const _add = (type, listener) => {
platform.addEventListener(this, type, listener);
listeners[type] = listener;
};
const _remove = (type, listener) => {
if (listeners[type]) {
platform.removeEventListener(this, type, listener);
delete listeners[type];
}
};
const listener = (width, height) => {
if (this.canvas) {
this.resize(width, height);
}
};
let detached; // eslint-disable-line prefer-const
const attached = () => {
_remove('attach', attached);
this.attached = true;
this.resize();
_add('resize', listener);
_add('detach', detached);
};
detached = () => {
this.attached = false;
_remove('resize', listener);
// Stop animating and remove metasets, so when re-attached, the animations start from beginning.
this._stop();
this._resize(0, 0);
_add('attach', attached);
};
if (platform.isAttached(this.canvas)) {
attached();
} else {
detached();
}
}
/**
* @private
*/
unbindEvents() {
each(this._listeners, (listener, type) => {
this.platform.removeEventListener(this, type, listener);
});
this._listeners = {};
each(this._responsiveListeners, (listener, type) => {
this.platform.removeEventListener(this, type, listener);
});
this._responsiveListeners = undefined;
}
updateHoverStyle(items, mode, enabled) {
const prefix = enabled ? 'set' : 'remove';
let meta, item, i, ilen;
if (mode === 'dataset') {
meta = this.getDatasetMeta(items[0].datasetIndex);
meta.controller['_' + prefix + 'DatasetHoverStyle']();
}
for (i = 0, ilen = items.length; i < ilen; ++i) {
item = items[i];
const controller = item && this.getDatasetMeta(item.datasetIndex).controller;
if (controller) {
controller[prefix + 'HoverStyle'](item.element, item.datasetIndex, item.index);
}
}
}
/**
* Get active (hovered) elements
* @returns array
*/
getActiveElements() {
return this._active || [];
}
/**
* Set active (hovered) elements
* @param {array} activeElements New active data points
*/
setActiveElements(activeElements) {
const lastActive = this._active || [];
const active = activeElements.map(({datasetIndex, index}) => {
const meta = this.getDatasetMeta(datasetIndex);
if (!meta) {
throw new Error('No dataset found at index ' + datasetIndex);
}
return {
datasetIndex,
element: meta.data[index],
index,
};
});
const changed = !_elementsEqual(active, lastActive);
if (changed) {
this._active = active;
// Make sure we don't use the previous mouse event to override the active elements in update.
this._lastEvent = null;
this._updateHoverStyles(active, lastActive);
}
}
/**
* Calls enabled plugins on the specified hook and with the given args.
* This method immediately returns as soon as a plugin explicitly returns false. The
* returned value can be used, for instance, to interrupt the current action.
* @param {string} hook - The name of the plugin method to call (e.g. 'beforeUpdate').
* @param {Object} [args] - Extra arguments to apply to the hook call.
* @param {import('./core.plugins.js').filterCallback} [filter] - Filtering function for limiting which plugins are notified
* @returns {boolean} false if any of the plugins return false, else returns true.
*/
notifyPlugins(hook, args, filter) {
return this._plugins.notify(this, hook, args, filter);
}
/**
* Check if a plugin with the specific ID is registered and enabled
* @param {string} pluginId - The ID of the plugin of which to check if it is enabled
* @returns {boolean}
*/
isPluginEnabled(pluginId) {
return this._plugins._cache.filter(p => p.plugin.id === pluginId).length === 1;
}
/**
* @private
*/
_updateHoverStyles(active, lastActive, replay) {
const hoverOptions = this.options.hover;
const diff = (a, b) => a.filter(x => !b.some(y => x.datasetIndex === y.datasetIndex && x.index === y.index));
const deactivated = diff(lastActive, active);
const activated = replay ? active : diff(active, lastActive);
if (deactivated.length) {
this.updateHoverStyle(deactivated, hoverOptions.mode, false);
}
if (activated.length && hoverOptions.mode) {
this.updateHoverStyle(activated, hoverOptions.mode, true);
}
}
/**
* @private
*/
_eventHandler(e, replay) {
const args = {
event: e,
replay,
cancelable: true,
inChartArea: this.isPointInArea(e)
};
const eventFilter = (plugin) => (plugin.options.events || this.options.events).includes(e.native.type);
if (this.notifyPlugins('beforeEvent', args, eventFilter) === false) {
return;
}
const changed = this._handleEvent(e, replay, args.inChartArea);
args.cancelable = false;
this.notifyPlugins('afterEvent', args, eventFilter);
if (changed || args.changed) {
this.render();
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | true |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.scale.autoskip.js | src/core/core.scale.autoskip.js | import {isNullOrUndef, valueOrDefault} from '../helpers/helpers.core.js';
import {_factorize} from '../helpers/helpers.math.js';
/**
* @typedef { import('./core.controller.js').default } Chart
* @typedef {{value:number | string, label?:string, major?:boolean, $context?:any}} Tick
*/
/**
* Returns a subset of ticks to be plotted to avoid overlapping labels.
* @param {import('./core.scale.js').default} scale
* @param {Tick[]} ticks
* @return {Tick[]}
* @private
*/
export function autoSkip(scale, ticks) {
const tickOpts = scale.options.ticks;
const determinedMaxTicks = determineMaxTicks(scale);
const ticksLimit = Math.min(tickOpts.maxTicksLimit || determinedMaxTicks, determinedMaxTicks);
const majorIndices = tickOpts.major.enabled ? getMajorIndices(ticks) : [];
const numMajorIndices = majorIndices.length;
const first = majorIndices[0];
const last = majorIndices[numMajorIndices - 1];
const newTicks = [];
// If there are too many major ticks to display them all
if (numMajorIndices > ticksLimit) {
skipMajors(ticks, newTicks, majorIndices, numMajorIndices / ticksLimit);
return newTicks;
}
const spacing = calculateSpacing(majorIndices, ticks, ticksLimit);
if (numMajorIndices > 0) {
let i, ilen;
const avgMajorSpacing = numMajorIndices > 1 ? Math.round((last - first) / (numMajorIndices - 1)) : null;
skip(ticks, newTicks, spacing, isNullOrUndef(avgMajorSpacing) ? 0 : first - avgMajorSpacing, first);
for (i = 0, ilen = numMajorIndices - 1; i < ilen; i++) {
skip(ticks, newTicks, spacing, majorIndices[i], majorIndices[i + 1]);
}
skip(ticks, newTicks, spacing, last, isNullOrUndef(avgMajorSpacing) ? ticks.length : last + avgMajorSpacing);
return newTicks;
}
skip(ticks, newTicks, spacing);
return newTicks;
}
function determineMaxTicks(scale) {
const offset = scale.options.offset;
const tickLength = scale._tickSize();
const maxScale = scale._length / tickLength + (offset ? 0 : 1);
const maxChart = scale._maxLength / tickLength;
return Math.floor(Math.min(maxScale, maxChart));
}
/**
* @param {number[]} majorIndices
* @param {Tick[]} ticks
* @param {number} ticksLimit
*/
function calculateSpacing(majorIndices, ticks, ticksLimit) {
const evenMajorSpacing = getEvenSpacing(majorIndices);
const spacing = ticks.length / ticksLimit;
// If the major ticks are evenly spaced apart, place the minor ticks
// so that they divide the major ticks into even chunks
if (!evenMajorSpacing) {
return Math.max(spacing, 1);
}
const factors = _factorize(evenMajorSpacing);
for (let i = 0, ilen = factors.length - 1; i < ilen; i++) {
const factor = factors[i];
if (factor > spacing) {
return factor;
}
}
return Math.max(spacing, 1);
}
/**
* @param {Tick[]} ticks
*/
function getMajorIndices(ticks) {
const result = [];
let i, ilen;
for (i = 0, ilen = ticks.length; i < ilen; i++) {
if (ticks[i].major) {
result.push(i);
}
}
return result;
}
/**
* @param {Tick[]} ticks
* @param {Tick[]} newTicks
* @param {number[]} majorIndices
* @param {number} spacing
*/
function skipMajors(ticks, newTicks, majorIndices, spacing) {
let count = 0;
let next = majorIndices[0];
let i;
spacing = Math.ceil(spacing);
for (i = 0; i < ticks.length; i++) {
if (i === next) {
newTicks.push(ticks[i]);
count++;
next = majorIndices[count * spacing];
}
}
}
/**
* @param {Tick[]} ticks
* @param {Tick[]} newTicks
* @param {number} spacing
* @param {number} [majorStart]
* @param {number} [majorEnd]
*/
function skip(ticks, newTicks, spacing, majorStart, majorEnd) {
const start = valueOrDefault(majorStart, 0);
const end = Math.min(valueOrDefault(majorEnd, ticks.length), ticks.length);
let count = 0;
let length, i, next;
spacing = Math.ceil(spacing);
if (majorEnd) {
length = majorEnd - majorStart;
spacing = length / Math.floor(length / spacing);
}
next = start;
while (next < 0) {
count++;
next = Math.round(start + count * spacing);
}
for (i = Math.max(start, 0); i < end; i++) {
if (i === next) {
newTicks.push(ticks[i]);
count++;
next = Math.round(start + count * spacing);
}
}
}
/**
* @param {number[]} arr
*/
function getEvenSpacing(arr) {
const len = arr.length;
let i, diff;
if (len < 2) {
return false;
}
for (diff = arr[0], i = 1; i < len; ++i) {
if (arr[i] - arr[i - 1] !== diff) {
return false;
}
}
return diff;
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.ticks.js | src/core/core.ticks.js | import {isArray} from '../helpers/helpers.core.js';
import {formatNumber} from '../helpers/helpers.intl.js';
import {log10} from '../helpers/helpers.math.js';
/**
* Namespace to hold formatters for different types of ticks
* @namespace Chart.Ticks.formatters
*/
const formatters = {
/**
* Formatter for value labels
* @method Chart.Ticks.formatters.values
* @param value the value to display
* @return {string|string[]} the label to display
*/
values(value) {
return isArray(value) ? /** @type {string[]} */ (value) : '' + value;
},
/**
* Formatter for numeric ticks
* @method Chart.Ticks.formatters.numeric
* @param tickValue {number} the value to be formatted
* @param index {number} the position of the tickValue parameter in the ticks array
* @param ticks {object[]} the list of ticks being converted
* @return {string} string representation of the tickValue parameter
*/
numeric(tickValue, index, ticks) {
if (tickValue === 0) {
return '0'; // never show decimal places for 0
}
const locale = this.chart.options.locale;
let notation;
let delta = tickValue; // This is used when there are less than 2 ticks as the tick interval.
if (ticks.length > 1) {
// all ticks are small or there huge numbers; use scientific notation
const maxTick = Math.max(Math.abs(ticks[0].value), Math.abs(ticks[ticks.length - 1].value));
if (maxTick < 1e-4 || maxTick > 1e+15) {
notation = 'scientific';
}
delta = calculateDelta(tickValue, ticks);
}
const logDelta = log10(Math.abs(delta));
// When datasets have values approaching Number.MAX_VALUE, the tick calculations might result in
// infinity and eventually NaN. Passing NaN for minimumFractionDigits or maximumFractionDigits
// will make the number formatter throw. So instead we check for isNaN and use a fallback value.
//
// toFixed has a max of 20 decimal places
const numDecimal = isNaN(logDelta) ? 1 : Math.max(Math.min(-1 * Math.floor(logDelta), 20), 0);
const options = {notation, minimumFractionDigits: numDecimal, maximumFractionDigits: numDecimal};
Object.assign(options, this.options.ticks.format);
return formatNumber(tickValue, locale, options);
},
/**
* Formatter for logarithmic ticks
* @method Chart.Ticks.formatters.logarithmic
* @param tickValue {number} the value to be formatted
* @param index {number} the position of the tickValue parameter in the ticks array
* @param ticks {object[]} the list of ticks being converted
* @return {string} string representation of the tickValue parameter
*/
logarithmic(tickValue, index, ticks) {
if (tickValue === 0) {
return '0';
}
const remain = ticks[index].significand || (tickValue / (Math.pow(10, Math.floor(log10(tickValue)))));
if ([1, 2, 3, 5, 10, 15].includes(remain) || index > 0.8 * ticks.length) {
return formatters.numeric.call(this, tickValue, index, ticks);
}
return '';
}
};
function calculateDelta(tickValue, ticks) {
// Figure out how many digits to show
// The space between the first two ticks might be smaller than normal spacing
let delta = ticks.length > 3 ? ticks[2].value - ticks[1].value : ticks[1].value - ticks[0].value;
// If we have a number like 2.5 as the delta, figure out how many decimal places we need
if (Math.abs(delta) >= 1 && tickValue !== Math.floor(tickValue)) {
// not an integer
delta = tickValue - Math.floor(tickValue);
}
return delta;
}
/**
* Namespace to hold static tick generation functions
* @namespace Chart.Ticks
*/
export default {formatters};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.scale.defaults.js | src/core/core.scale.defaults.js | import Ticks from './core.ticks.js';
export function applyScaleDefaults(defaults) {
defaults.set('scale', {
display: true,
offset: false,
reverse: false,
beginAtZero: false,
/**
* Scale boundary strategy (bypassed by min/max time options)
* - `data`: make sure data are fully visible, ticks outside are removed
* - `ticks`: make sure ticks are fully visible, data outside are truncated
* @see https://github.com/chartjs/Chart.js/pull/4556
* @since 3.0.0
*/
bounds: 'ticks',
clip: true,
/**
* Addition grace added to max and reduced from min data value.
* @since 3.0.0
*/
grace: 0,
// grid line settings
grid: {
display: true,
lineWidth: 1,
drawOnChartArea: true,
drawTicks: true,
tickLength: 8,
tickWidth: (_ctx, options) => options.lineWidth,
tickColor: (_ctx, options) => options.color,
offset: false,
},
border: {
display: true,
dash: [],
dashOffset: 0.0,
width: 1
},
// scale title
title: {
// display property
display: false,
// actual label
text: '',
// top/bottom padding
padding: {
top: 4,
bottom: 4
}
},
// label settings
ticks: {
minRotation: 0,
maxRotation: 50,
mirror: false,
textStrokeWidth: 0,
textStrokeColor: '',
padding: 3,
display: true,
autoSkip: true,
autoSkipPadding: 3,
labelOffset: 0,
// We pass through arrays to be rendered as multiline labels, we convert Others to strings here.
callback: Ticks.formatters.values,
minor: {},
major: {},
align: 'center',
crossAlign: 'near',
showLabelBackdrop: false,
backdropColor: 'rgba(255, 255, 255, 0.75)',
backdropPadding: 2,
}
});
defaults.route('scale.ticks', 'color', '', 'color');
defaults.route('scale.grid', 'color', '', 'borderColor');
defaults.route('scale.border', 'color', '', 'borderColor');
defaults.route('scale.title', 'color', '', 'color');
defaults.describe('scale', {
_fallback: false,
_scriptable: (name) => !name.startsWith('before') && !name.startsWith('after') && name !== 'callback' && name !== 'parser',
_indexable: (name) => name !== 'borderDash' && name !== 'tickBorderDash' && name !== 'dash',
});
defaults.describe('scales', {
_fallback: 'scale',
});
defaults.describe('scale.ticks', {
_scriptable: (name) => name !== 'backdropPadding' && name !== 'callback',
_indexable: (name) => name !== 'backdropPadding',
});
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.config.js | src/core/core.config.js | import defaults, {overrides, descriptors} from './core.defaults.js';
import {mergeIf, resolveObjectKey, isArray, isFunction, valueOrDefault, isObject} from '../helpers/helpers.core.js';
import {_attachContext, _createResolver, _descriptors} from '../helpers/helpers.config.js';
export function getIndexAxis(type, options) {
const datasetDefaults = defaults.datasets[type] || {};
const datasetOptions = (options.datasets || {})[type] || {};
return datasetOptions.indexAxis || options.indexAxis || datasetDefaults.indexAxis || 'x';
}
function getAxisFromDefaultScaleID(id, indexAxis) {
let axis = id;
if (id === '_index_') {
axis = indexAxis;
} else if (id === '_value_') {
axis = indexAxis === 'x' ? 'y' : 'x';
}
return axis;
}
function getDefaultScaleIDFromAxis(axis, indexAxis) {
return axis === indexAxis ? '_index_' : '_value_';
}
function idMatchesAxis(id) {
if (id === 'x' || id === 'y' || id === 'r') {
return id;
}
}
function axisFromPosition(position) {
if (position === 'top' || position === 'bottom') {
return 'x';
}
if (position === 'left' || position === 'right') {
return 'y';
}
}
export function determineAxis(id, ...scaleOptions) {
if (idMatchesAxis(id)) {
return id;
}
for (const opts of scaleOptions) {
const axis = opts.axis
|| axisFromPosition(opts.position)
|| id.length > 1 && idMatchesAxis(id[0].toLowerCase());
if (axis) {
return axis;
}
}
throw new Error(`Cannot determine type of '${id}' axis. Please provide 'axis' or 'position' option.`);
}
function getAxisFromDataset(id, axis, dataset) {
if (dataset[axis + 'AxisID'] === id) {
return {axis};
}
}
function retrieveAxisFromDatasets(id, config) {
if (config.data && config.data.datasets) {
const boundDs = config.data.datasets.filter((d) => d.xAxisID === id || d.yAxisID === id);
if (boundDs.length) {
return getAxisFromDataset(id, 'x', boundDs[0]) || getAxisFromDataset(id, 'y', boundDs[0]);
}
}
return {};
}
function mergeScaleConfig(config, options) {
const chartDefaults = overrides[config.type] || {scales: {}};
const configScales = options.scales || {};
const chartIndexAxis = getIndexAxis(config.type, options);
const scales = Object.create(null);
// First figure out first scale id's per axis.
Object.keys(configScales).forEach(id => {
const scaleConf = configScales[id];
if (!isObject(scaleConf)) {
return console.error(`Invalid scale configuration for scale: ${id}`);
}
if (scaleConf._proxy) {
return console.warn(`Ignoring resolver passed as options for scale: ${id}`);
}
const axis = determineAxis(id, scaleConf, retrieveAxisFromDatasets(id, config), defaults.scales[scaleConf.type]);
const defaultId = getDefaultScaleIDFromAxis(axis, chartIndexAxis);
const defaultScaleOptions = chartDefaults.scales || {};
scales[id] = mergeIf(Object.create(null), [{axis}, scaleConf, defaultScaleOptions[axis], defaultScaleOptions[defaultId]]);
});
// Then merge dataset defaults to scale configs
config.data.datasets.forEach(dataset => {
const type = dataset.type || config.type;
const indexAxis = dataset.indexAxis || getIndexAxis(type, options);
const datasetDefaults = overrides[type] || {};
const defaultScaleOptions = datasetDefaults.scales || {};
Object.keys(defaultScaleOptions).forEach(defaultID => {
const axis = getAxisFromDefaultScaleID(defaultID, indexAxis);
const id = dataset[axis + 'AxisID'] || axis;
scales[id] = scales[id] || Object.create(null);
mergeIf(scales[id], [{axis}, configScales[id], defaultScaleOptions[defaultID]]);
});
});
// apply scale defaults, if not overridden by dataset defaults
Object.keys(scales).forEach(key => {
const scale = scales[key];
mergeIf(scale, [defaults.scales[scale.type], defaults.scale]);
});
return scales;
}
function initOptions(config) {
const options = config.options || (config.options = {});
options.plugins = valueOrDefault(options.plugins, {});
options.scales = mergeScaleConfig(config, options);
}
function initData(data) {
data = data || {};
data.datasets = data.datasets || [];
data.labels = data.labels || [];
return data;
}
function initConfig(config) {
config = config || {};
config.data = initData(config.data);
initOptions(config);
return config;
}
const keyCache = new Map();
const keysCached = new Set();
function cachedKeys(cacheKey, generate) {
let keys = keyCache.get(cacheKey);
if (!keys) {
keys = generate();
keyCache.set(cacheKey, keys);
keysCached.add(keys);
}
return keys;
}
const addIfFound = (set, obj, key) => {
const opts = resolveObjectKey(obj, key);
if (opts !== undefined) {
set.add(opts);
}
};
export default class Config {
constructor(config) {
this._config = initConfig(config);
this._scopeCache = new Map();
this._resolverCache = new Map();
}
get platform() {
return this._config.platform;
}
get type() {
return this._config.type;
}
set type(type) {
this._config.type = type;
}
get data() {
return this._config.data;
}
set data(data) {
this._config.data = initData(data);
}
get options() {
return this._config.options;
}
set options(options) {
this._config.options = options;
}
get plugins() {
return this._config.plugins;
}
update() {
const config = this._config;
this.clearCache();
initOptions(config);
}
clearCache() {
this._scopeCache.clear();
this._resolverCache.clear();
}
/**
* Returns the option scope keys for resolving dataset options.
* These keys do not include the dataset itself, because it is not under options.
* @param {string} datasetType
* @return {string[][]}
*/
datasetScopeKeys(datasetType) {
return cachedKeys(datasetType,
() => [[
`datasets.${datasetType}`,
''
]]);
}
/**
* Returns the option scope keys for resolving dataset animation options.
* These keys do not include the dataset itself, because it is not under options.
* @param {string} datasetType
* @param {string} transition
* @return {string[][]}
*/
datasetAnimationScopeKeys(datasetType, transition) {
return cachedKeys(`${datasetType}.transition.${transition}`,
() => [
[
`datasets.${datasetType}.transitions.${transition}`,
`transitions.${transition}`,
],
// The following are used for looking up the `animations` and `animation` keys
[
`datasets.${datasetType}`,
''
]
]);
}
/**
* Returns the options scope keys for resolving element options that belong
* to an dataset. These keys do not include the dataset itself, because it
* is not under options.
* @param {string} datasetType
* @param {string} elementType
* @return {string[][]}
*/
datasetElementScopeKeys(datasetType, elementType) {
return cachedKeys(`${datasetType}-${elementType}`,
() => [[
`datasets.${datasetType}.elements.${elementType}`,
`datasets.${datasetType}`,
`elements.${elementType}`,
''
]]);
}
/**
* Returns the options scope keys for resolving plugin options.
* @param {{id: string, additionalOptionScopes?: string[]}} plugin
* @return {string[][]}
*/
pluginScopeKeys(plugin) {
const id = plugin.id;
const type = this.type;
return cachedKeys(`${type}-plugin-${id}`,
() => [[
`plugins.${id}`,
...plugin.additionalOptionScopes || [],
]]);
}
/**
* @private
*/
_cachedScopes(mainScope, resetCache) {
const _scopeCache = this._scopeCache;
let cache = _scopeCache.get(mainScope);
if (!cache || resetCache) {
cache = new Map();
_scopeCache.set(mainScope, cache);
}
return cache;
}
/**
* Resolves the objects from options and defaults for option value resolution.
* @param {object} mainScope - The main scope object for options
* @param {string[][]} keyLists - The arrays of keys in resolution order
* @param {boolean} [resetCache] - reset the cache for this mainScope
*/
getOptionScopes(mainScope, keyLists, resetCache) {
const {options, type} = this;
const cache = this._cachedScopes(mainScope, resetCache);
const cached = cache.get(keyLists);
if (cached) {
return cached;
}
const scopes = new Set();
keyLists.forEach(keys => {
if (mainScope) {
scopes.add(mainScope);
keys.forEach(key => addIfFound(scopes, mainScope, key));
}
keys.forEach(key => addIfFound(scopes, options, key));
keys.forEach(key => addIfFound(scopes, overrides[type] || {}, key));
keys.forEach(key => addIfFound(scopes, defaults, key));
keys.forEach(key => addIfFound(scopes, descriptors, key));
});
const array = Array.from(scopes);
if (array.length === 0) {
array.push(Object.create(null));
}
if (keysCached.has(keyLists)) {
cache.set(keyLists, array);
}
return array;
}
/**
* Returns the option scopes for resolving chart options
* @return {object[]}
*/
chartOptionScopes() {
const {options, type} = this;
return [
options,
overrides[type] || {},
defaults.datasets[type] || {}, // https://github.com/chartjs/Chart.js/issues/8531
{type},
defaults,
descriptors
];
}
/**
* @param {object[]} scopes
* @param {string[]} names
* @param {function|object} context
* @param {string[]} [prefixes]
* @return {object}
*/
resolveNamedOptions(scopes, names, context, prefixes = ['']) {
const result = {$shared: true};
const {resolver, subPrefixes} = getResolver(this._resolverCache, scopes, prefixes);
let options = resolver;
if (needContext(resolver, names)) {
result.$shared = false;
context = isFunction(context) ? context() : context;
// subResolver is passed to scriptable options. It should not resolve to hover options.
const subResolver = this.createResolver(scopes, context, subPrefixes);
options = _attachContext(resolver, context, subResolver);
}
for (const prop of names) {
result[prop] = options[prop];
}
return result;
}
/**
* @param {object[]} scopes
* @param {object} [context]
* @param {string[]} [prefixes]
* @param {{scriptable: boolean, indexable: boolean, allKeys?: boolean}} [descriptorDefaults]
*/
createResolver(scopes, context, prefixes = [''], descriptorDefaults) {
const {resolver} = getResolver(this._resolverCache, scopes, prefixes);
return isObject(context)
? _attachContext(resolver, context, undefined, descriptorDefaults)
: resolver;
}
}
function getResolver(resolverCache, scopes, prefixes) {
let cache = resolverCache.get(scopes);
if (!cache) {
cache = new Map();
resolverCache.set(scopes, cache);
}
const cacheKey = prefixes.join();
let cached = cache.get(cacheKey);
if (!cached) {
const resolver = _createResolver(scopes, prefixes);
cached = {
resolver,
subPrefixes: prefixes.filter(p => !p.toLowerCase().includes('hover'))
};
cache.set(cacheKey, cached);
}
return cached;
}
const hasFunction = value => isObject(value)
&& Object.getOwnPropertyNames(value).some((key) => isFunction(value[key]));
function needContext(proxy, names) {
const {isScriptable, isIndexable} = _descriptors(proxy);
for (const prop of names) {
const scriptable = isScriptable(prop);
const indexable = isIndexable(prop);
const value = (indexable || scriptable) && proxy[prop];
if ((scriptable && (isFunction(value) || hasFunction(value)))
|| (indexable && isArray(value))) {
return true;
}
}
return false;
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.registry.js | src/core/core.registry.js | import DatasetController from './core.datasetController.js';
import Element from './core.element.js';
import Scale from './core.scale.js';
import TypedRegistry from './core.typedRegistry.js';
import {each, callback as call, _capitalize} from '../helpers/helpers.core.js';
/**
* Please use the module's default export which provides a singleton instance
* Note: class is exported for typedoc
*/
export class Registry {
constructor() {
this.controllers = new TypedRegistry(DatasetController, 'datasets', true);
this.elements = new TypedRegistry(Element, 'elements');
this.plugins = new TypedRegistry(Object, 'plugins');
this.scales = new TypedRegistry(Scale, 'scales');
// Order is important, Scale has Element in prototype chain,
// so Scales must be before Elements. Plugins are a fallback, so not listed here.
this._typedRegistries = [this.controllers, this.scales, this.elements];
}
/**
* @param {...any} args
*/
add(...args) {
this._each('register', args);
}
remove(...args) {
this._each('unregister', args);
}
/**
* @param {...typeof DatasetController} args
*/
addControllers(...args) {
this._each('register', args, this.controllers);
}
/**
* @param {...typeof Element} args
*/
addElements(...args) {
this._each('register', args, this.elements);
}
/**
* @param {...any} args
*/
addPlugins(...args) {
this._each('register', args, this.plugins);
}
/**
* @param {...typeof Scale} args
*/
addScales(...args) {
this._each('register', args, this.scales);
}
/**
* @param {string} id
* @returns {typeof DatasetController}
*/
getController(id) {
return this._get(id, this.controllers, 'controller');
}
/**
* @param {string} id
* @returns {typeof Element}
*/
getElement(id) {
return this._get(id, this.elements, 'element');
}
/**
* @param {string} id
* @returns {object}
*/
getPlugin(id) {
return this._get(id, this.plugins, 'plugin');
}
/**
* @param {string} id
* @returns {typeof Scale}
*/
getScale(id) {
return this._get(id, this.scales, 'scale');
}
/**
* @param {...typeof DatasetController} args
*/
removeControllers(...args) {
this._each('unregister', args, this.controllers);
}
/**
* @param {...typeof Element} args
*/
removeElements(...args) {
this._each('unregister', args, this.elements);
}
/**
* @param {...any} args
*/
removePlugins(...args) {
this._each('unregister', args, this.plugins);
}
/**
* @param {...typeof Scale} args
*/
removeScales(...args) {
this._each('unregister', args, this.scales);
}
/**
* @private
*/
_each(method, args, typedRegistry) {
[...args].forEach(arg => {
const reg = typedRegistry || this._getRegistryForType(arg);
if (typedRegistry || reg.isForType(arg) || (reg === this.plugins && arg.id)) {
this._exec(method, reg, arg);
} else {
// Handle loopable args
// Use case:
// import * as plugins from './plugins.js';
// Chart.register(plugins);
each(arg, item => {
// If there are mixed types in the loopable, make sure those are
// registered in correct registry
// Use case: (treemap exporting controller, elements etc)
// import * as treemap from 'chartjs-chart-treemap.js';
// Chart.register(treemap);
const itemReg = typedRegistry || this._getRegistryForType(item);
this._exec(method, itemReg, item);
});
}
});
}
/**
* @private
*/
_exec(method, registry, component) {
const camelMethod = _capitalize(method);
call(component['before' + camelMethod], [], component); // beforeRegister / beforeUnregister
registry[method](component);
call(component['after' + camelMethod], [], component); // afterRegister / afterUnregister
}
/**
* @private
*/
_getRegistryForType(type) {
for (let i = 0; i < this._typedRegistries.length; i++) {
const reg = this._typedRegistries[i];
if (reg.isForType(type)) {
return reg;
}
}
// plugins is the fallback registry
return this.plugins;
}
/**
* @private
*/
_get(id, typedRegistry, type) {
const item = typedRegistry.get(id);
if (item === undefined) {
throw new Error('"' + id + '" is not a registered ' + type + '.');
}
return item;
}
}
// singleton instance
export default /* #__PURE__ */ new Registry();
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.interaction.js | src/core/core.interaction.js | import {_lookupByKey, _rlookupByKey} from '../helpers/helpers.collection.js';
import {getRelativePosition} from '../helpers/helpers.dom.js';
import {_angleBetween, getAngleFromPoint} from '../helpers/helpers.math.js';
import {_isPointInArea, isNullOrUndef} from '../helpers/index.js';
/**
* @typedef { import('./core.controller.js').default } Chart
* @typedef { import('../types/index.js').ChartEvent } ChartEvent
* @typedef {{axis?: string, intersect?: boolean, includeInvisible?: boolean}} InteractionOptions
* @typedef {{datasetIndex: number, index: number, element: import('./core.element.js').default}} InteractionItem
* @typedef { import('../types/index.js').Point } Point
*/
/**
* Helper function to do binary search when possible
* @param {object} metaset - the dataset meta
* @param {string} axis - the axis mode. x|y|xy|r
* @param {number} value - the value to find
* @param {boolean} [intersect] - should the element intersect
* @returns {{lo:number, hi:number}} indices to search data array between
*/
function binarySearch(metaset, axis, value, intersect) {
const {controller, data, _sorted} = metaset;
const iScale = controller._cachedMeta.iScale;
const spanGaps = metaset.dataset ? metaset.dataset.options ? metaset.dataset.options.spanGaps : null : null;
if (iScale && axis === iScale.axis && axis !== 'r' && _sorted && data.length) {
const lookupMethod = iScale._reversePixels ? _rlookupByKey : _lookupByKey;
if (!intersect) {
const result = lookupMethod(data, axis, value);
if (spanGaps) {
const {vScale} = controller._cachedMeta;
const {_parsed} = metaset;
const distanceToDefinedLo = (_parsed
.slice(0, result.lo + 1)
.reverse()
.findIndex(
point => !isNullOrUndef(point[vScale.axis])));
result.lo -= Math.max(0, distanceToDefinedLo);
const distanceToDefinedHi = (_parsed
.slice(result.hi)
.findIndex(
point => !isNullOrUndef(point[vScale.axis])));
result.hi += Math.max(0, distanceToDefinedHi);
}
return result;
} else if (controller._sharedOptions) {
// _sharedOptions indicates that each element has equal options -> equal proportions
// So we can do a ranged binary search based on the range of first element and
// be confident to get the full range of indices that can intersect with the value.
const el = data[0];
const range = typeof el.getRange === 'function' && el.getRange(axis);
if (range) {
const start = lookupMethod(data, axis, value - range);
const end = lookupMethod(data, axis, value + range);
return {lo: start.lo, hi: end.hi};
}
}
}
// Default to all elements, when binary search can not be used.
return {lo: 0, hi: data.length - 1};
}
/**
* Helper function to select candidate elements for interaction
* @param {Chart} chart - the chart
* @param {string} axis - the axis mode. x|y|xy|r
* @param {Point} position - the point to be nearest to, in relative coordinates
* @param {function} handler - the callback to execute for each visible item
* @param {boolean} [intersect] - consider intersecting items
*/
function evaluateInteractionItems(chart, axis, position, handler, intersect) {
const metasets = chart.getSortedVisibleDatasetMetas();
const value = position[axis];
for (let i = 0, ilen = metasets.length; i < ilen; ++i) {
const {index, data} = metasets[i];
const {lo, hi} = binarySearch(metasets[i], axis, value, intersect);
for (let j = lo; j <= hi; ++j) {
const element = data[j];
if (!element.skip) {
handler(element, index, j);
}
}
}
}
/**
* Get a distance metric function for two points based on the
* axis mode setting
* @param {string} axis - the axis mode. x|y|xy|r
*/
function getDistanceMetricForAxis(axis) {
const useX = axis.indexOf('x') !== -1;
const useY = axis.indexOf('y') !== -1;
return function(pt1, pt2) {
const deltaX = useX ? Math.abs(pt1.x - pt2.x) : 0;
const deltaY = useY ? Math.abs(pt1.y - pt2.y) : 0;
return Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2));
};
}
/**
* Helper function to get the items that intersect the event position
* @param {Chart} chart - the chart
* @param {Point} position - the point to be nearest to, in relative coordinates
* @param {string} axis - the axis mode. x|y|xy|r
* @param {boolean} [useFinalPosition] - use the element's animation target instead of current position
* @param {boolean} [includeInvisible] - include invisible points that are outside of the chart area
* @return {InteractionItem[]} the nearest items
*/
function getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) {
const items = [];
if (!includeInvisible && !chart.isPointInArea(position)) {
return items;
}
const evaluationFunc = function(element, datasetIndex, index) {
if (!includeInvisible && !_isPointInArea(element, chart.chartArea, 0)) {
return;
}
if (element.inRange(position.x, position.y, useFinalPosition)) {
items.push({element, datasetIndex, index});
}
};
evaluateInteractionItems(chart, axis, position, evaluationFunc, true);
return items;
}
/**
* Helper function to get the items nearest to the event position for a radial chart
* @param {Chart} chart - the chart to look at elements from
* @param {Point} position - the point to be nearest to, in relative coordinates
* @param {string} axis - the axes along which to measure distance
* @param {boolean} [useFinalPosition] - use the element's animation target instead of current position
* @return {InteractionItem[]} the nearest items
*/
function getNearestRadialItems(chart, position, axis, useFinalPosition) {
let items = [];
function evaluationFunc(element, datasetIndex, index) {
const {startAngle, endAngle} = element.getProps(['startAngle', 'endAngle'], useFinalPosition);
const {angle} = getAngleFromPoint(element, {x: position.x, y: position.y});
if (_angleBetween(angle, startAngle, endAngle)) {
items.push({element, datasetIndex, index});
}
}
evaluateInteractionItems(chart, axis, position, evaluationFunc);
return items;
}
/**
* Helper function to get the items nearest to the event position for a cartesian chart
* @param {Chart} chart - the chart to look at elements from
* @param {Point} position - the point to be nearest to, in relative coordinates
* @param {string} axis - the axes along which to measure distance
* @param {boolean} [intersect] - if true, only consider items that intersect the position
* @param {boolean} [useFinalPosition] - use the element's animation target instead of current position
* @param {boolean} [includeInvisible] - include invisible points that are outside of the chart area
* @return {InteractionItem[]} the nearest items
*/
function getNearestCartesianItems(chart, position, axis, intersect, useFinalPosition, includeInvisible) {
let items = [];
const distanceMetric = getDistanceMetricForAxis(axis);
let minDistance = Number.POSITIVE_INFINITY;
function evaluationFunc(element, datasetIndex, index) {
const inRange = element.inRange(position.x, position.y, useFinalPosition);
if (intersect && !inRange) {
return;
}
const center = element.getCenterPoint(useFinalPosition);
const pointInArea = !!includeInvisible || chart.isPointInArea(center);
if (!pointInArea && !inRange) {
return;
}
const distance = distanceMetric(position, center);
if (distance < minDistance) {
items = [{element, datasetIndex, index}];
minDistance = distance;
} else if (distance === minDistance) {
// Can have multiple items at the same distance in which case we sort by size
items.push({element, datasetIndex, index});
}
}
evaluateInteractionItems(chart, axis, position, evaluationFunc);
return items;
}
/**
* Helper function to get the items nearest to the event position considering all visible items in the chart
* @param {Chart} chart - the chart to look at elements from
* @param {Point} position - the point to be nearest to, in relative coordinates
* @param {string} axis - the axes along which to measure distance
* @param {boolean} [intersect] - if true, only consider items that intersect the position
* @param {boolean} [useFinalPosition] - use the element's animation target instead of current position
* @param {boolean} [includeInvisible] - include invisible points that are outside of the chart area
* @return {InteractionItem[]} the nearest items
*/
function getNearestItems(chart, position, axis, intersect, useFinalPosition, includeInvisible) {
if (!includeInvisible && !chart.isPointInArea(position)) {
return [];
}
return axis === 'r' && !intersect
? getNearestRadialItems(chart, position, axis, useFinalPosition)
: getNearestCartesianItems(chart, position, axis, intersect, useFinalPosition, includeInvisible);
}
/**
* Helper function to get the items matching along the given X or Y axis
* @param {Chart} chart - the chart to look at elements from
* @param {Point} position - the point to be nearest to, in relative coordinates
* @param {string} axis - the axis to match
* @param {boolean} [intersect] - if true, only consider items that intersect the position
* @param {boolean} [useFinalPosition] - use the element's animation target instead of current position
* @return {InteractionItem[]} the nearest items
*/
function getAxisItems(chart, position, axis, intersect, useFinalPosition) {
const items = [];
const rangeMethod = axis === 'x' ? 'inXRange' : 'inYRange';
let intersectsItem = false;
evaluateInteractionItems(chart, axis, position, (element, datasetIndex, index) => {
if (element[rangeMethod] && element[rangeMethod](position[axis], useFinalPosition)) {
items.push({element, datasetIndex, index});
intersectsItem = intersectsItem || element.inRange(position.x, position.y, useFinalPosition);
}
});
// If we want to trigger on an intersect and we don't have any items
// that intersect the position, return nothing
if (intersect && !intersectsItem) {
return [];
}
return items;
}
/**
* Contains interaction related functions
* @namespace Chart.Interaction
*/
export default {
// Part of the public API to facilitate developers creating their own modes
evaluateInteractionItems,
// Helper function for different modes
modes: {
/**
* Returns items at the same index. If the options.intersect parameter is true, we only return items if we intersect something
* If the options.intersect mode is false, we find the nearest item and return the items at the same index as that item
* @function Chart.Interaction.modes.index
* @since v2.4.0
* @param {Chart} chart - the chart we are returning items from
* @param {Event} e - the event we are find things at
* @param {InteractionOptions} options - options to use
* @param {boolean} [useFinalPosition] - use final element position (animation target)
* @return {InteractionItem[]} - items that are found
*/
index(chart, e, options, useFinalPosition) {
const position = getRelativePosition(e, chart);
// Default axis for index mode is 'x' to match old behaviour
const axis = options.axis || 'x';
const includeInvisible = options.includeInvisible || false;
const items = options.intersect
? getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible)
: getNearestItems(chart, position, axis, false, useFinalPosition, includeInvisible);
const elements = [];
if (!items.length) {
return [];
}
chart.getSortedVisibleDatasetMetas().forEach((meta) => {
const index = items[0].index;
const element = meta.data[index];
// don't count items that are skipped (null data)
if (element && !element.skip) {
elements.push({element, datasetIndex: meta.index, index});
}
});
return elements;
},
/**
* Returns items in the same dataset. If the options.intersect parameter is true, we only return items if we intersect something
* If the options.intersect is false, we find the nearest item and return the items in that dataset
* @function Chart.Interaction.modes.dataset
* @param {Chart} chart - the chart we are returning items from
* @param {Event} e - the event we are find things at
* @param {InteractionOptions} options - options to use
* @param {boolean} [useFinalPosition] - use final element position (animation target)
* @return {InteractionItem[]} - items that are found
*/
dataset(chart, e, options, useFinalPosition) {
const position = getRelativePosition(e, chart);
const axis = options.axis || 'xy';
const includeInvisible = options.includeInvisible || false;
let items = options.intersect
? getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) :
getNearestItems(chart, position, axis, false, useFinalPosition, includeInvisible);
if (items.length > 0) {
const datasetIndex = items[0].datasetIndex;
const data = chart.getDatasetMeta(datasetIndex).data;
items = [];
for (let i = 0; i < data.length; ++i) {
items.push({element: data[i], datasetIndex, index: i});
}
}
return items;
},
/**
* Point mode returns all elements that hit test based on the event position
* of the event
* @function Chart.Interaction.modes.intersect
* @param {Chart} chart - the chart we are returning items from
* @param {Event} e - the event we are find things at
* @param {InteractionOptions} options - options to use
* @param {boolean} [useFinalPosition] - use final element position (animation target)
* @return {InteractionItem[]} - items that are found
*/
point(chart, e, options, useFinalPosition) {
const position = getRelativePosition(e, chart);
const axis = options.axis || 'xy';
const includeInvisible = options.includeInvisible || false;
return getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible);
},
/**
* nearest mode returns the element closest to the point
* @function Chart.Interaction.modes.intersect
* @param {Chart} chart - the chart we are returning items from
* @param {Event} e - the event we are find things at
* @param {InteractionOptions} options - options to use
* @param {boolean} [useFinalPosition] - use final element position (animation target)
* @return {InteractionItem[]} - items that are found
*/
nearest(chart, e, options, useFinalPosition) {
const position = getRelativePosition(e, chart);
const axis = options.axis || 'xy';
const includeInvisible = options.includeInvisible || false;
return getNearestItems(chart, position, axis, options.intersect, useFinalPosition, includeInvisible);
},
/**
* x mode returns the elements that hit-test at the current x coordinate
* @function Chart.Interaction.modes.x
* @param {Chart} chart - the chart we are returning items from
* @param {Event} e - the event we are find things at
* @param {InteractionOptions} options - options to use
* @param {boolean} [useFinalPosition] - use final element position (animation target)
* @return {InteractionItem[]} - items that are found
*/
x(chart, e, options, useFinalPosition) {
const position = getRelativePosition(e, chart);
return getAxisItems(chart, position, 'x', options.intersect, useFinalPosition);
},
/**
* y mode returns the elements that hit-test at the current y coordinate
* @function Chart.Interaction.modes.y
* @param {Chart} chart - the chart we are returning items from
* @param {Event} e - the event we are find things at
* @param {InteractionOptions} options - options to use
* @param {boolean} [useFinalPosition] - use final element position (animation target)
* @return {InteractionItem[]} - items that are found
*/
y(chart, e, options, useFinalPosition) {
const position = getRelativePosition(e, chart);
return getAxisItems(chart, position, 'y', options.intersect, useFinalPosition);
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.plugins.js | src/core/core.plugins.js | import registry from './core.registry.js';
import {callback as callCallback, isNullOrUndef, valueOrDefault} from '../helpers/helpers.core.js';
/**
* @typedef { import('./core.controller.js').default } Chart
* @typedef { import('../types/index.js').ChartEvent } ChartEvent
* @typedef { import('../plugins/plugin.tooltip.js').default } Tooltip
*/
/**
* @callback filterCallback
* @param {{plugin: object, options: object}} value
* @param {number} [index]
* @param {array} [array]
* @param {object} [thisArg]
* @return {boolean}
*/
export default class PluginService {
constructor() {
this._init = undefined;
}
/**
* Calls enabled plugins for `chart` on the specified hook and with the given args.
* This method immediately returns as soon as a plugin explicitly returns false. The
* returned value can be used, for instance, to interrupt the current action.
* @param {Chart} chart - The chart instance for which plugins should be called.
* @param {string} hook - The name of the plugin method to call (e.g. 'beforeUpdate').
* @param {object} [args] - Extra arguments to apply to the hook call.
* @param {filterCallback} [filter] - Filtering function for limiting which plugins are notified
* @returns {boolean} false if any of the plugins return false, else returns true.
*/
notify(chart, hook, args, filter) {
if (hook === 'beforeInit') {
this._init = this._createDescriptors(chart, true);
this._notify(this._init, chart, 'install');
}
if (this._init === undefined) { // Do not trigger events before install
return;
}
const descriptors = filter ? this._descriptors(chart).filter(filter) : this._descriptors(chart);
const result = this._notify(descriptors, chart, hook, args);
if (hook === 'afterDestroy') {
this._notify(descriptors, chart, 'stop');
this._notify(this._init, chart, 'uninstall');
this._init = undefined; // Do not trigger events after uninstall
}
return result;
}
/**
* @private
*/
_notify(descriptors, chart, hook, args) {
args = args || {};
for (const descriptor of descriptors) {
const plugin = descriptor.plugin;
const method = plugin[hook];
const params = [chart, args, descriptor.options];
if (callCallback(method, params, plugin) === false && args.cancelable) {
return false;
}
}
return true;
}
invalidate() {
// When plugins are registered, there is the possibility of a double
// invalidate situation. In this case, we only want to invalidate once.
// If we invalidate multiple times, the `_oldCache` is lost and all of the
// plugins are restarted without being correctly stopped.
// See https://github.com/chartjs/Chart.js/issues/8147
if (!isNullOrUndef(this._cache)) {
this._oldCache = this._cache;
this._cache = undefined;
}
}
/**
* @param {Chart} chart
* @private
*/
_descriptors(chart) {
if (this._cache) {
return this._cache;
}
const descriptors = this._cache = this._createDescriptors(chart);
this._notifyStateChanges(chart);
return descriptors;
}
_createDescriptors(chart, all) {
const config = chart && chart.config;
const options = valueOrDefault(config.options && config.options.plugins, {});
const plugins = allPlugins(config);
// options === false => all plugins are disabled
return options === false && !all ? [] : createDescriptors(chart, plugins, options, all);
}
/**
* @param {Chart} chart
* @private
*/
_notifyStateChanges(chart) {
const previousDescriptors = this._oldCache || [];
const descriptors = this._cache;
const diff = (a, b) => a.filter(x => !b.some(y => x.plugin.id === y.plugin.id));
this._notify(diff(previousDescriptors, descriptors), chart, 'stop');
this._notify(diff(descriptors, previousDescriptors), chart, 'start');
}
}
/**
* @param {import('./core.config.js').default} config
*/
function allPlugins(config) {
const localIds = {};
const plugins = [];
const keys = Object.keys(registry.plugins.items);
for (let i = 0; i < keys.length; i++) {
plugins.push(registry.getPlugin(keys[i]));
}
const local = config.plugins || [];
for (let i = 0; i < local.length; i++) {
const plugin = local[i];
if (plugins.indexOf(plugin) === -1) {
plugins.push(plugin);
localIds[plugin.id] = true;
}
}
return {plugins, localIds};
}
function getOpts(options, all) {
if (!all && options === false) {
return null;
}
if (options === true) {
return {};
}
return options;
}
function createDescriptors(chart, {plugins, localIds}, options, all) {
const result = [];
const context = chart.getContext();
for (const plugin of plugins) {
const id = plugin.id;
const opts = getOpts(options[id], all);
if (opts === null) {
continue;
}
result.push({
plugin,
options: pluginOpts(chart.config, {plugin, local: localIds[id]}, opts, context)
});
}
return result;
}
function pluginOpts(config, {plugin, local}, opts, context) {
const keys = config.pluginScopeKeys(plugin);
const scopes = config.getOptionScopes(opts, keys);
if (local && plugin.defaults) {
// make sure plugin defaults are in scopes for local (not registered) plugins
scopes.push(plugin.defaults);
}
return config.createResolver(scopes, context, [''], {
// These are just defaults that plugins can override
scriptable: false,
indexable: false,
allKeys: true
});
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.typedRegistry.js | src/core/core.typedRegistry.js | import {merge} from '../helpers/index.js';
import defaults, {overrides} from './core.defaults.js';
/**
* @typedef {{id: string, defaults: any, overrides?: any, defaultRoutes: any}} IChartComponent
*/
export default class TypedRegistry {
constructor(type, scope, override) {
this.type = type;
this.scope = scope;
this.override = override;
this.items = Object.create(null);
}
isForType(type) {
return Object.prototype.isPrototypeOf.call(this.type.prototype, type.prototype);
}
/**
* @param {IChartComponent} item
* @returns {string} The scope where items defaults were registered to.
*/
register(item) {
const proto = Object.getPrototypeOf(item);
let parentScope;
if (isIChartComponent(proto)) {
// Make sure the parent is registered and note the scope where its defaults are.
parentScope = this.register(proto);
}
const items = this.items;
const id = item.id;
const scope = this.scope + '.' + id;
if (!id) {
throw new Error('class does not have id: ' + item);
}
if (id in items) {
// already registered
return scope;
}
items[id] = item;
registerDefaults(item, scope, parentScope);
if (this.override) {
defaults.override(item.id, item.overrides);
}
return scope;
}
/**
* @param {string} id
* @returns {object?}
*/
get(id) {
return this.items[id];
}
/**
* @param {IChartComponent} item
*/
unregister(item) {
const items = this.items;
const id = item.id;
const scope = this.scope;
if (id in items) {
delete items[id];
}
if (scope && id in defaults[scope]) {
delete defaults[scope][id];
if (this.override) {
delete overrides[id];
}
}
}
}
function registerDefaults(item, scope, parentScope) {
// Inherit the parent's defaults and keep existing defaults
const itemDefaults = merge(Object.create(null), [
parentScope ? defaults.get(parentScope) : {},
defaults.get(scope),
item.defaults
]);
defaults.set(scope, itemDefaults);
if (item.defaultRoutes) {
routeDefaults(scope, item.defaultRoutes);
}
if (item.descriptors) {
defaults.describe(scope, item.descriptors);
}
}
function routeDefaults(scope, routes) {
Object.keys(routes).forEach(property => {
const propertyParts = property.split('.');
const sourceName = propertyParts.pop();
const sourceScope = [scope].concat(propertyParts).join('.');
const parts = routes[property].split('.');
const targetName = parts.pop();
const targetScope = parts.join('.');
defaults.route(sourceScope, sourceName, targetScope, targetName);
});
}
function isIChartComponent(proto) {
return 'id' in proto && 'defaults' in proto;
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.animations.defaults.js | src/core/core.animations.defaults.js | const numbers = ['x', 'y', 'borderWidth', 'radius', 'tension'];
const colors = ['color', 'borderColor', 'backgroundColor'];
export function applyAnimationsDefaults(defaults) {
defaults.set('animation', {
delay: undefined,
duration: 1000,
easing: 'easeOutQuart',
fn: undefined,
from: undefined,
loop: undefined,
to: undefined,
type: undefined,
});
defaults.describe('animation', {
_fallback: false,
_indexable: false,
_scriptable: (name) => name !== 'onProgress' && name !== 'onComplete' && name !== 'fn',
});
defaults.set('animations', {
colors: {
type: 'color',
properties: colors
},
numbers: {
type: 'number',
properties: numbers
},
});
defaults.describe('animations', {
_fallback: 'animation',
});
defaults.set('transitions', {
active: {
animation: {
duration: 400
}
},
resize: {
animation: {
duration: 0
}
},
show: {
animations: {
colors: {
from: 'transparent'
},
visible: {
type: 'boolean',
duration: 0 // show immediately
},
}
},
hide: {
animations: {
colors: {
to: 'transparent'
},
visible: {
type: 'boolean',
easing: 'linear',
fn: v => v | 0 // for keeping the dataset visible all the way through the animation
},
}
}
});
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.animator.js | src/core/core.animator.js | import {requestAnimFrame} from '../helpers/helpers.extras.js';
/**
* @typedef { import('./core.animation.js').default } Animation
* @typedef { import('./core.controller.js').default } Chart
*/
/**
* Please use the module's default export which provides a singleton instance
* Note: class is export for typedoc
*/
export class Animator {
constructor() {
this._request = null;
this._charts = new Map();
this._running = false;
this._lastDate = undefined;
}
/**
* @private
*/
_notify(chart, anims, date, type) {
const callbacks = anims.listeners[type];
const numSteps = anims.duration;
callbacks.forEach(fn => fn({
chart,
initial: anims.initial,
numSteps,
currentStep: Math.min(date - anims.start, numSteps)
}));
}
/**
* @private
*/
_refresh() {
if (this._request) {
return;
}
this._running = true;
this._request = requestAnimFrame.call(window, () => {
this._update();
this._request = null;
if (this._running) {
this._refresh();
}
});
}
/**
* @private
*/
_update(date = Date.now()) {
let remaining = 0;
this._charts.forEach((anims, chart) => {
if (!anims.running || !anims.items.length) {
return;
}
const items = anims.items;
let i = items.length - 1;
let draw = false;
let item;
for (; i >= 0; --i) {
item = items[i];
if (item._active) {
if (item._total > anims.duration) {
// if the animation has been updated and its duration prolonged,
// update to total duration of current animations run (for progress event)
anims.duration = item._total;
}
item.tick(date);
draw = true;
} else {
// Remove the item by replacing it with last item and removing the last
// A lot faster than splice.
items[i] = items[items.length - 1];
items.pop();
}
}
if (draw) {
chart.draw();
this._notify(chart, anims, date, 'progress');
}
if (!items.length) {
anims.running = false;
this._notify(chart, anims, date, 'complete');
anims.initial = false;
}
remaining += items.length;
});
this._lastDate = date;
if (remaining === 0) {
this._running = false;
}
}
/**
* @private
*/
_getAnims(chart) {
const charts = this._charts;
let anims = charts.get(chart);
if (!anims) {
anims = {
running: false,
initial: true,
items: [],
listeners: {
complete: [],
progress: []
}
};
charts.set(chart, anims);
}
return anims;
}
/**
* @param {Chart} chart
* @param {string} event - event name
* @param {Function} cb - callback
*/
listen(chart, event, cb) {
this._getAnims(chart).listeners[event].push(cb);
}
/**
* Add animations
* @param {Chart} chart
* @param {Animation[]} items - animations
*/
add(chart, items) {
if (!items || !items.length) {
return;
}
this._getAnims(chart).items.push(...items);
}
/**
* Counts number of active animations for the chart
* @param {Chart} chart
*/
has(chart) {
return this._getAnims(chart).items.length > 0;
}
/**
* Start animating (all charts)
* @param {Chart} chart
*/
start(chart) {
const anims = this._charts.get(chart);
if (!anims) {
return;
}
anims.running = true;
anims.start = Date.now();
anims.duration = anims.items.reduce((acc, cur) => Math.max(acc, cur._duration), 0);
this._refresh();
}
running(chart) {
if (!this._running) {
return false;
}
const anims = this._charts.get(chart);
if (!anims || !anims.running || !anims.items.length) {
return false;
}
return true;
}
/**
* Stop all animations for the chart
* @param {Chart} chart
*/
stop(chart) {
const anims = this._charts.get(chart);
if (!anims || !anims.items.length) {
return;
}
const items = anims.items;
let i = items.length - 1;
for (; i >= 0; --i) {
items[i].cancel();
}
anims.items = [];
this._notify(chart, anims, Date.now(), 'complete');
}
/**
* Remove chart from Animator
* @param {Chart} chart
*/
remove(chart) {
return this._charts.delete(chart);
}
}
// singleton instance
export default /* #__PURE__ */ new Animator();
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.layouts.defaults.js | src/core/core.layouts.defaults.js | export function applyLayoutsDefaults(defaults) {
defaults.set('layout', {
autoPadding: true,
padding: {
top: 0,
right: 0,
bottom: 0,
left: 0
}
});
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.datasetController.js | src/core/core.datasetController.js | import Animations from './core.animations.js';
import defaults from './core.defaults.js';
import {isArray, isFinite, isObject, valueOrDefault, resolveObjectKey, defined} from '../helpers/helpers.core.js';
import {listenArrayEvents, unlistenArrayEvents} from '../helpers/helpers.collection.js';
import {createContext, sign} from '../helpers/index.js';
/**
* @typedef { import('./core.controller.js').default } Chart
* @typedef { import('./core.scale.js').default } Scale
*/
function scaleClip(scale, allowedOverflow) {
const opts = scale && scale.options || {};
const reverse = opts.reverse;
const min = opts.min === undefined ? allowedOverflow : 0;
const max = opts.max === undefined ? allowedOverflow : 0;
return {
start: reverse ? max : min,
end: reverse ? min : max
};
}
function defaultClip(xScale, yScale, allowedOverflow) {
if (allowedOverflow === false) {
return false;
}
const x = scaleClip(xScale, allowedOverflow);
const y = scaleClip(yScale, allowedOverflow);
return {
top: y.end,
right: x.end,
bottom: y.start,
left: x.start
};
}
function toClip(value) {
let t, r, b, l;
if (isObject(value)) {
t = value.top;
r = value.right;
b = value.bottom;
l = value.left;
} else {
t = r = b = l = value;
}
return {
top: t,
right: r,
bottom: b,
left: l,
disabled: value === false
};
}
function getSortedDatasetIndices(chart, filterVisible) {
const keys = [];
const metasets = chart._getSortedDatasetMetas(filterVisible);
let i, ilen;
for (i = 0, ilen = metasets.length; i < ilen; ++i) {
keys.push(metasets[i].index);
}
return keys;
}
function applyStack(stack, value, dsIndex, options = {}) {
const keys = stack.keys;
const singleMode = options.mode === 'single';
let i, ilen, datasetIndex, otherValue;
if (value === null) {
return;
}
let found = false;
for (i = 0, ilen = keys.length; i < ilen; ++i) {
datasetIndex = +keys[i];
if (datasetIndex === dsIndex) {
found = true;
if (options.all) {
continue;
}
break;
}
otherValue = stack.values[datasetIndex];
if (isFinite(otherValue) && (singleMode || (value === 0 || sign(value) === sign(otherValue)))) {
value += otherValue;
}
}
if (!found && !options.all) {
return 0;
}
return value;
}
function convertObjectDataToArray(data, meta) {
const {iScale, vScale} = meta;
const iAxisKey = iScale.axis === 'x' ? 'x' : 'y';
const vAxisKey = vScale.axis === 'x' ? 'x' : 'y';
const keys = Object.keys(data);
const adata = new Array(keys.length);
let i, ilen, key;
for (i = 0, ilen = keys.length; i < ilen; ++i) {
key = keys[i];
adata[i] = {
[iAxisKey]: key,
[vAxisKey]: data[key]
};
}
return adata;
}
function isStacked(scale, meta) {
const stacked = scale && scale.options.stacked;
return stacked || (stacked === undefined && meta.stack !== undefined);
}
function getStackKey(indexScale, valueScale, meta) {
return `${indexScale.id}.${valueScale.id}.${meta.stack || meta.type}`;
}
function getUserBounds(scale) {
const {min, max, minDefined, maxDefined} = scale.getUserBounds();
return {
min: minDefined ? min : Number.NEGATIVE_INFINITY,
max: maxDefined ? max : Number.POSITIVE_INFINITY
};
}
function getOrCreateStack(stacks, stackKey, indexValue) {
const subStack = stacks[stackKey] || (stacks[stackKey] = {});
return subStack[indexValue] || (subStack[indexValue] = {});
}
function getLastIndexInStack(stack, vScale, positive, type) {
for (const meta of vScale.getMatchingVisibleMetas(type).reverse()) {
const value = stack[meta.index];
if ((positive && value > 0) || (!positive && value < 0)) {
return meta.index;
}
}
return null;
}
function updateStacks(controller, parsed) {
const {chart, _cachedMeta: meta} = controller;
const stacks = chart._stacks || (chart._stacks = {}); // map structure is {stackKey: {datasetIndex: value}}
const {iScale, vScale, index: datasetIndex} = meta;
const iAxis = iScale.axis;
const vAxis = vScale.axis;
const key = getStackKey(iScale, vScale, meta);
const ilen = parsed.length;
let stack;
for (let i = 0; i < ilen; ++i) {
const item = parsed[i];
const {[iAxis]: index, [vAxis]: value} = item;
const itemStacks = item._stacks || (item._stacks = {});
stack = itemStacks[vAxis] = getOrCreateStack(stacks, key, index);
stack[datasetIndex] = value;
stack._top = getLastIndexInStack(stack, vScale, true, meta.type);
stack._bottom = getLastIndexInStack(stack, vScale, false, meta.type);
const visualValues = stack._visualValues || (stack._visualValues = {});
visualValues[datasetIndex] = value;
}
}
function getFirstScaleId(chart, axis) {
const scales = chart.scales;
return Object.keys(scales).filter(key => scales[key].axis === axis).shift();
}
function createDatasetContext(parent, index) {
return createContext(parent,
{
active: false,
dataset: undefined,
datasetIndex: index,
index,
mode: 'default',
type: 'dataset'
}
);
}
function createDataContext(parent, index, element) {
return createContext(parent, {
active: false,
dataIndex: index,
parsed: undefined,
raw: undefined,
element,
index,
mode: 'default',
type: 'data'
});
}
function clearStacks(meta, items) {
// Not using meta.index here, because it might be already updated if the dataset changed location
const datasetIndex = meta.controller.index;
const axis = meta.vScale && meta.vScale.axis;
if (!axis) {
return;
}
items = items || meta._parsed;
for (const parsed of items) {
const stacks = parsed._stacks;
if (!stacks || stacks[axis] === undefined || stacks[axis][datasetIndex] === undefined) {
return;
}
delete stacks[axis][datasetIndex];
if (stacks[axis]._visualValues !== undefined && stacks[axis]._visualValues[datasetIndex] !== undefined) {
delete stacks[axis]._visualValues[datasetIndex];
}
}
}
const isDirectUpdateMode = (mode) => mode === 'reset' || mode === 'none';
const cloneIfNotShared = (cached, shared) => shared ? cached : Object.assign({}, cached);
const createStack = (canStack, meta, chart) => canStack && !meta.hidden && meta._stacked
&& {keys: getSortedDatasetIndices(chart, true), values: null};
export default class DatasetController {
/**
* @type {any}
*/
static defaults = {};
/**
* Element type used to generate a meta dataset (e.g. Chart.element.LineElement).
*/
static datasetElementType = null;
/**
* Element type used to generate a meta data (e.g. Chart.element.PointElement).
*/
static dataElementType = null;
/**
* @param {Chart} chart
* @param {number} datasetIndex
*/
constructor(chart, datasetIndex) {
this.chart = chart;
this._ctx = chart.ctx;
this.index = datasetIndex;
this._cachedDataOpts = {};
this._cachedMeta = this.getMeta();
this._type = this._cachedMeta.type;
this.options = undefined;
/** @type {boolean | object} */
this._parsing = false;
this._data = undefined;
this._objectData = undefined;
this._sharedOptions = undefined;
this._drawStart = undefined;
this._drawCount = undefined;
this.enableOptionSharing = false;
this.supportsDecimation = false;
this.$context = undefined;
this._syncList = [];
this.datasetElementType = new.target.datasetElementType;
this.dataElementType = new.target.dataElementType;
this.initialize();
}
initialize() {
const meta = this._cachedMeta;
this.configure();
this.linkScales();
meta._stacked = isStacked(meta.vScale, meta);
this.addElements();
if (this.options.fill && !this.chart.isPluginEnabled('filler')) {
console.warn("Tried to use the 'fill' option without the 'Filler' plugin enabled. Please import and register the 'Filler' plugin and make sure it is not disabled in the options");
}
}
updateIndex(datasetIndex) {
if (this.index !== datasetIndex) {
clearStacks(this._cachedMeta);
}
this.index = datasetIndex;
}
linkScales() {
const chart = this.chart;
const meta = this._cachedMeta;
const dataset = this.getDataset();
const chooseId = (axis, x, y, r) => axis === 'x' ? x : axis === 'r' ? r : y;
const xid = meta.xAxisID = valueOrDefault(dataset.xAxisID, getFirstScaleId(chart, 'x'));
const yid = meta.yAxisID = valueOrDefault(dataset.yAxisID, getFirstScaleId(chart, 'y'));
const rid = meta.rAxisID = valueOrDefault(dataset.rAxisID, getFirstScaleId(chart, 'r'));
const indexAxis = meta.indexAxis;
const iid = meta.iAxisID = chooseId(indexAxis, xid, yid, rid);
const vid = meta.vAxisID = chooseId(indexAxis, yid, xid, rid);
meta.xScale = this.getScaleForId(xid);
meta.yScale = this.getScaleForId(yid);
meta.rScale = this.getScaleForId(rid);
meta.iScale = this.getScaleForId(iid);
meta.vScale = this.getScaleForId(vid);
}
getDataset() {
return this.chart.data.datasets[this.index];
}
getMeta() {
return this.chart.getDatasetMeta(this.index);
}
/**
* @param {string} scaleID
* @return {Scale}
*/
getScaleForId(scaleID) {
return this.chart.scales[scaleID];
}
/**
* @private
*/
_getOtherScale(scale) {
const meta = this._cachedMeta;
return scale === meta.iScale
? meta.vScale
: meta.iScale;
}
reset() {
this._update('reset');
}
/**
* @private
*/
_destroy() {
const meta = this._cachedMeta;
if (this._data) {
unlistenArrayEvents(this._data, this);
}
if (meta._stacked) {
clearStacks(meta);
}
}
/**
* @private
*/
_dataCheck() {
const dataset = this.getDataset();
const data = dataset.data || (dataset.data = []);
const _data = this._data;
// In order to correctly handle data addition/deletion animation (and thus simulate
// real-time charts), we need to monitor these data modifications and synchronize
// the internal metadata accordingly.
if (isObject(data)) {
const meta = this._cachedMeta;
this._data = convertObjectDataToArray(data, meta);
} else if (_data !== data) {
if (_data) {
// This case happens when the user replaced the data array instance.
unlistenArrayEvents(_data, this);
// Discard old parsed data and stacks
const meta = this._cachedMeta;
clearStacks(meta);
meta._parsed = [];
}
if (data && Object.isExtensible(data)) {
listenArrayEvents(data, this);
}
this._syncList = [];
this._data = data;
}
}
addElements() {
const meta = this._cachedMeta;
this._dataCheck();
if (this.datasetElementType) {
meta.dataset = new this.datasetElementType();
}
}
buildOrUpdateElements(resetNewElements) {
const meta = this._cachedMeta;
const dataset = this.getDataset();
let stackChanged = false;
this._dataCheck();
// make sure cached _stacked status is current
const oldStacked = meta._stacked;
meta._stacked = isStacked(meta.vScale, meta);
// detect change in stack option
if (meta.stack !== dataset.stack) {
stackChanged = true;
// remove values from old stack
clearStacks(meta);
meta.stack = dataset.stack;
}
// Re-sync meta data in case the user replaced the data array or if we missed
// any updates and so make sure that we handle number of datapoints changing.
this._resyncElements(resetNewElements);
// if stack changed, update stack values for the whole dataset
if (stackChanged || oldStacked !== meta._stacked) {
updateStacks(this, meta._parsed);
meta._stacked = isStacked(meta.vScale, meta);
}
}
/**
* Merges user-supplied and default dataset-level options
* @private
*/
configure() {
const config = this.chart.config;
const scopeKeys = config.datasetScopeKeys(this._type);
const scopes = config.getOptionScopes(this.getDataset(), scopeKeys, true);
this.options = config.createResolver(scopes, this.getContext());
this._parsing = this.options.parsing;
this._cachedDataOpts = {};
}
/**
* @param {number} start
* @param {number} count
*/
parse(start, count) {
const {_cachedMeta: meta, _data: data} = this;
const {iScale, _stacked} = meta;
const iAxis = iScale.axis;
let sorted = start === 0 && count === data.length ? true : meta._sorted;
let prev = start > 0 && meta._parsed[start - 1];
let i, cur, parsed;
if (this._parsing === false) {
meta._parsed = data;
meta._sorted = true;
parsed = data;
} else {
if (isArray(data[start])) {
parsed = this.parseArrayData(meta, data, start, count);
} else if (isObject(data[start])) {
parsed = this.parseObjectData(meta, data, start, count);
} else {
parsed = this.parsePrimitiveData(meta, data, start, count);
}
const isNotInOrderComparedToPrev = () => cur[iAxis] === null || (prev && cur[iAxis] < prev[iAxis]);
for (i = 0; i < count; ++i) {
meta._parsed[i + start] = cur = parsed[i];
if (sorted) {
if (isNotInOrderComparedToPrev()) {
sorted = false;
}
prev = cur;
}
}
meta._sorted = sorted;
}
if (_stacked) {
updateStacks(this, parsed);
}
}
/**
* Parse array of primitive values
* @param {object} meta - dataset meta
* @param {array} data - data array. Example [1,3,4]
* @param {number} start - start index
* @param {number} count - number of items to parse
* @returns {object} parsed item - item containing index and a parsed value
* for each scale id.
* Example: {xScale0: 0, yScale0: 1}
* @protected
*/
parsePrimitiveData(meta, data, start, count) {
const {iScale, vScale} = meta;
const iAxis = iScale.axis;
const vAxis = vScale.axis;
const labels = iScale.getLabels();
const singleScale = iScale === vScale;
const parsed = new Array(count);
let i, ilen, index;
for (i = 0, ilen = count; i < ilen; ++i) {
index = i + start;
parsed[i] = {
[iAxis]: singleScale || iScale.parse(labels[index], index),
[vAxis]: vScale.parse(data[index], index)
};
}
return parsed;
}
/**
* Parse array of arrays
* @param {object} meta - dataset meta
* @param {array} data - data array. Example [[1,2],[3,4]]
* @param {number} start - start index
* @param {number} count - number of items to parse
* @returns {object} parsed item - item containing index and a parsed value
* for each scale id.
* Example: {x: 0, y: 1}
* @protected
*/
parseArrayData(meta, data, start, count) {
const {xScale, yScale} = meta;
const parsed = new Array(count);
let i, ilen, index, item;
for (i = 0, ilen = count; i < ilen; ++i) {
index = i + start;
item = data[index];
parsed[i] = {
x: xScale.parse(item[0], index),
y: yScale.parse(item[1], index)
};
}
return parsed;
}
/**
* Parse array of objects
* @param {object} meta - dataset meta
* @param {array} data - data array. Example [{x:1, y:5}, {x:2, y:10}]
* @param {number} start - start index
* @param {number} count - number of items to parse
* @returns {object} parsed item - item containing index and a parsed value
* for each scale id. _custom is optional
* Example: {xScale0: 0, yScale0: 1, _custom: {r: 10, foo: 'bar'}}
* @protected
*/
parseObjectData(meta, data, start, count) {
const {xScale, yScale} = meta;
const {xAxisKey = 'x', yAxisKey = 'y'} = this._parsing;
const parsed = new Array(count);
let i, ilen, index, item;
for (i = 0, ilen = count; i < ilen; ++i) {
index = i + start;
item = data[index];
parsed[i] = {
x: xScale.parse(resolveObjectKey(item, xAxisKey), index),
y: yScale.parse(resolveObjectKey(item, yAxisKey), index)
};
}
return parsed;
}
/**
* @protected
*/
getParsed(index) {
return this._cachedMeta._parsed[index];
}
/**
* @protected
*/
getDataElement(index) {
return this._cachedMeta.data[index];
}
/**
* @protected
*/
applyStack(scale, parsed, mode) {
const chart = this.chart;
const meta = this._cachedMeta;
const value = parsed[scale.axis];
const stack = {
keys: getSortedDatasetIndices(chart, true),
values: parsed._stacks[scale.axis]._visualValues
};
return applyStack(stack, value, meta.index, {mode});
}
/**
* @protected
*/
updateRangeFromParsed(range, scale, parsed, stack) {
const parsedValue = parsed[scale.axis];
let value = parsedValue === null ? NaN : parsedValue;
const values = stack && parsed._stacks[scale.axis];
if (stack && values) {
stack.values = values;
value = applyStack(stack, parsedValue, this._cachedMeta.index);
}
range.min = Math.min(range.min, value);
range.max = Math.max(range.max, value);
}
/**
* @protected
*/
getMinMax(scale, canStack) {
const meta = this._cachedMeta;
const _parsed = meta._parsed;
const sorted = meta._sorted && scale === meta.iScale;
const ilen = _parsed.length;
const otherScale = this._getOtherScale(scale);
const stack = createStack(canStack, meta, this.chart);
const range = {min: Number.POSITIVE_INFINITY, max: Number.NEGATIVE_INFINITY};
const {min: otherMin, max: otherMax} = getUserBounds(otherScale);
let i, parsed;
function _skip() {
parsed = _parsed[i];
const otherValue = parsed[otherScale.axis];
return !isFinite(parsed[scale.axis]) || otherMin > otherValue || otherMax < otherValue;
}
for (i = 0; i < ilen; ++i) {
if (_skip()) {
continue;
}
this.updateRangeFromParsed(range, scale, parsed, stack);
if (sorted) {
// if the data is sorted, we don't need to check further from this end of array
break;
}
}
if (sorted) {
// in the sorted case, find first non-skipped value from other end of array
for (i = ilen - 1; i >= 0; --i) {
if (_skip()) {
continue;
}
this.updateRangeFromParsed(range, scale, parsed, stack);
break;
}
}
return range;
}
getAllParsedValues(scale) {
const parsed = this._cachedMeta._parsed;
const values = [];
let i, ilen, value;
for (i = 0, ilen = parsed.length; i < ilen; ++i) {
value = parsed[i][scale.axis];
if (isFinite(value)) {
values.push(value);
}
}
return values;
}
/**
* @return {number|boolean}
* @protected
*/
getMaxOverflow() {
return false;
}
/**
* @protected
*/
getLabelAndValue(index) {
const meta = this._cachedMeta;
const iScale = meta.iScale;
const vScale = meta.vScale;
const parsed = this.getParsed(index);
return {
label: iScale ? '' + iScale.getLabelForValue(parsed[iScale.axis]) : '',
value: vScale ? '' + vScale.getLabelForValue(parsed[vScale.axis]) : ''
};
}
/**
* @private
*/
_update(mode) {
const meta = this._cachedMeta;
this.update(mode || 'default');
meta._clip = toClip(valueOrDefault(this.options.clip, defaultClip(meta.xScale, meta.yScale, this.getMaxOverflow())));
}
/**
* @param {string} mode
*/
update(mode) {} // eslint-disable-line no-unused-vars
draw() {
const ctx = this._ctx;
const chart = this.chart;
const meta = this._cachedMeta;
const elements = meta.data || [];
const area = chart.chartArea;
const active = [];
const start = this._drawStart || 0;
const count = this._drawCount || (elements.length - start);
const drawActiveElementsOnTop = this.options.drawActiveElementsOnTop;
let i;
if (meta.dataset) {
meta.dataset.draw(ctx, area, start, count);
}
for (i = start; i < start + count; ++i) {
const element = elements[i];
if (element.hidden) {
continue;
}
if (element.active && drawActiveElementsOnTop) {
active.push(element);
} else {
element.draw(ctx, area);
}
}
for (i = 0; i < active.length; ++i) {
active[i].draw(ctx, area);
}
}
/**
* Returns a set of predefined style properties that should be used to represent the dataset
* or the data if the index is specified
* @param {number} index - data index
* @param {boolean} [active] - true if hover
* @return {object} style object
*/
getStyle(index, active) {
const mode = active ? 'active' : 'default';
return index === undefined && this._cachedMeta.dataset
? this.resolveDatasetElementOptions(mode)
: this.resolveDataElementOptions(index || 0, mode);
}
/**
* @protected
*/
getContext(index, active, mode) {
const dataset = this.getDataset();
let context;
if (index >= 0 && index < this._cachedMeta.data.length) {
const element = this._cachedMeta.data[index];
context = element.$context ||
(element.$context = createDataContext(this.getContext(), index, element));
context.parsed = this.getParsed(index);
context.raw = dataset.data[index];
context.index = context.dataIndex = index;
} else {
context = this.$context ||
(this.$context = createDatasetContext(this.chart.getContext(), this.index));
context.dataset = dataset;
context.index = context.datasetIndex = this.index;
}
context.active = !!active;
context.mode = mode;
return context;
}
/**
* @param {string} [mode]
* @protected
*/
resolveDatasetElementOptions(mode) {
return this._resolveElementOptions(this.datasetElementType.id, mode);
}
/**
* @param {number} index
* @param {string} [mode]
* @protected
*/
resolveDataElementOptions(index, mode) {
return this._resolveElementOptions(this.dataElementType.id, mode, index);
}
/**
* @private
*/
_resolveElementOptions(elementType, mode = 'default', index) {
const active = mode === 'active';
const cache = this._cachedDataOpts;
const cacheKey = elementType + '-' + mode;
const cached = cache[cacheKey];
const sharing = this.enableOptionSharing && defined(index);
if (cached) {
return cloneIfNotShared(cached, sharing);
}
const config = this.chart.config;
const scopeKeys = config.datasetElementScopeKeys(this._type, elementType);
const prefixes = active ? [`${elementType}Hover`, 'hover', elementType, ''] : [elementType, ''];
const scopes = config.getOptionScopes(this.getDataset(), scopeKeys);
const names = Object.keys(defaults.elements[elementType]);
// context is provided as a function, and is called only if needed,
// so we don't create a context for each element if not needed.
const context = () => this.getContext(index, active, mode);
const values = config.resolveNamedOptions(scopes, names, context, prefixes);
if (values.$shared) {
// `$shared` indicates this set of options can be shared between multiple elements.
// Sharing is used to reduce number of properties to change during animation.
values.$shared = sharing;
// We cache options by `mode`, which can be 'active' for example. This enables us
// to have the 'active' element options and 'default' options to switch between
// when interacting.
cache[cacheKey] = Object.freeze(cloneIfNotShared(values, sharing));
}
return values;
}
/**
* @private
*/
_resolveAnimations(index, transition, active) {
const chart = this.chart;
const cache = this._cachedDataOpts;
const cacheKey = `animation-${transition}`;
const cached = cache[cacheKey];
if (cached) {
return cached;
}
let options;
if (chart.options.animation !== false) {
const config = this.chart.config;
const scopeKeys = config.datasetAnimationScopeKeys(this._type, transition);
const scopes = config.getOptionScopes(this.getDataset(), scopeKeys);
options = config.createResolver(scopes, this.getContext(index, active, transition));
}
const animations = new Animations(chart, options && options.animations);
if (options && options._cacheable) {
cache[cacheKey] = Object.freeze(animations);
}
return animations;
}
/**
* Utility for getting the options object shared between elements
* @protected
*/
getSharedOptions(options) {
if (!options.$shared) {
return;
}
return this._sharedOptions || (this._sharedOptions = Object.assign({}, options));
}
/**
* Utility for determining if `options` should be included in the updated properties
* @protected
*/
includeOptions(mode, sharedOptions) {
return !sharedOptions || isDirectUpdateMode(mode) || this.chart._animationsDisabled;
}
/**
* @todo v4, rename to getSharedOptions and remove excess functions
*/
_getSharedOptions(start, mode) {
const firstOpts = this.resolveDataElementOptions(start, mode);
const previouslySharedOptions = this._sharedOptions;
const sharedOptions = this.getSharedOptions(firstOpts);
const includeOptions = this.includeOptions(mode, sharedOptions) || (sharedOptions !== previouslySharedOptions);
this.updateSharedOptions(sharedOptions, mode, firstOpts);
return {sharedOptions, includeOptions};
}
/**
* Utility for updating an element with new properties, using animations when appropriate.
* @protected
*/
updateElement(element, index, properties, mode) {
if (isDirectUpdateMode(mode)) {
Object.assign(element, properties);
} else {
this._resolveAnimations(index, mode).update(element, properties);
}
}
/**
* Utility to animate the shared options, that are potentially affecting multiple elements.
* @protected
*/
updateSharedOptions(sharedOptions, mode, newOptions) {
if (sharedOptions && !isDirectUpdateMode(mode)) {
this._resolveAnimations(undefined, mode).update(sharedOptions, newOptions);
}
}
/**
* @private
*/
_setStyle(element, index, mode, active) {
element.active = active;
const options = this.getStyle(index, active);
this._resolveAnimations(index, mode, active).update(element, {
// When going from active to inactive, we need to update to the shared options.
// This way the once hovered element will end up with the same original shared options instance, after animation.
options: (!active && this.getSharedOptions(options)) || options
});
}
removeHoverStyle(element, datasetIndex, index) {
this._setStyle(element, index, 'active', false);
}
setHoverStyle(element, datasetIndex, index) {
this._setStyle(element, index, 'active', true);
}
/**
* @private
*/
_removeDatasetHoverStyle() {
const element = this._cachedMeta.dataset;
if (element) {
this._setStyle(element, undefined, 'active', false);
}
}
/**
* @private
*/
_setDatasetHoverStyle() {
const element = this._cachedMeta.dataset;
if (element) {
this._setStyle(element, undefined, 'active', true);
}
}
/**
* @private
*/
_resyncElements(resetNewElements) {
const data = this._data;
const elements = this._cachedMeta.data;
// Apply changes detected through array listeners
for (const [method, arg1, arg2] of this._syncList) {
this[method](arg1, arg2);
}
this._syncList = [];
const numMeta = elements.length;
const numData = data.length;
const count = Math.min(numData, numMeta);
if (count) {
// TODO: It is not optimal to always parse the old data
// This is done because we are not detecting direct assignments:
// chart.data.datasets[0].data[5] = 10;
// chart.data.datasets[0].data[5].y = 10;
this.parse(0, count);
}
if (numData > numMeta) {
this._insertElements(numMeta, numData - numMeta, resetNewElements);
} else if (numData < numMeta) {
this._removeElements(numData, numMeta - numData);
}
}
/**
* @private
*/
_insertElements(start, count, resetNewElements = true) {
const meta = this._cachedMeta;
const data = meta.data;
const end = start + count;
let i;
const move = (arr) => {
arr.length += count;
for (i = arr.length - 1; i >= end; i--) {
arr[i] = arr[i - count];
}
};
move(data);
for (i = start; i < end; ++i) {
data[i] = new this.dataElementType();
}
if (this._parsing) {
move(meta._parsed);
}
this.parse(start, count);
if (resetNewElements) {
this.updateElements(data, start, count, 'reset');
}
}
updateElements(element, start, count, mode) {} // eslint-disable-line no-unused-vars
/**
* @private
*/
_removeElements(start, count) {
const meta = this._cachedMeta;
if (this._parsing) {
const removed = meta._parsed.splice(start, count);
if (meta._stacked) {
clearStacks(meta, removed);
}
}
meta.data.splice(start, count);
}
/**
* @private
*/
_sync(args) {
if (this._parsing) {
this._syncList.push(args);
} else {
const [method, arg1, arg2] = args;
this[method](arg1, arg2);
}
this.chart._dataChanges.push([this.index, ...args]);
}
_onDataPush() {
const count = arguments.length;
this._sync(['_insertElements', this.getDataset().data.length - count, count]);
}
_onDataPop() {
this._sync(['_removeElements', this._cachedMeta.data.length - 1, 1]);
}
_onDataShift() {
this._sync(['_removeElements', 0, 1]);
}
_onDataSplice(start, count) {
if (count) {
this._sync(['_removeElements', start, count]);
}
const newCount = arguments.length - 2;
if (newCount) {
this._sync(['_insertElements', start, newCount]);
}
}
_onDataUnshift() {
this._sync(['_insertElements', 0, arguments.length]);
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.animation.js | src/core/core.animation.js | import effects from '../helpers/helpers.easing.js';
import {resolve} from '../helpers/helpers.options.js';
import {color as helpersColor} from '../helpers/helpers.color.js';
const transparent = 'transparent';
const interpolators = {
boolean(from, to, factor) {
return factor > 0.5 ? to : from;
},
/**
* @param {string} from
* @param {string} to
* @param {number} factor
*/
color(from, to, factor) {
const c0 = helpersColor(from || transparent);
const c1 = c0.valid && helpersColor(to || transparent);
return c1 && c1.valid
? c1.mix(c0, factor).hexString()
: to;
},
number(from, to, factor) {
return from + (to - from) * factor;
}
};
export default class Animation {
constructor(cfg, target, prop, to) {
const currentValue = target[prop];
to = resolve([cfg.to, to, currentValue, cfg.from]);
const from = resolve([cfg.from, currentValue, to]);
this._active = true;
this._fn = cfg.fn || interpolators[cfg.type || typeof from];
this._easing = effects[cfg.easing] || effects.linear;
this._start = Math.floor(Date.now() + (cfg.delay || 0));
this._duration = this._total = Math.floor(cfg.duration);
this._loop = !!cfg.loop;
this._target = target;
this._prop = prop;
this._from = from;
this._to = to;
this._promises = undefined;
}
active() {
return this._active;
}
update(cfg, to, date) {
if (this._active) {
this._notify(false);
const currentValue = this._target[this._prop];
const elapsed = date - this._start;
const remain = this._duration - elapsed;
this._start = date;
this._duration = Math.floor(Math.max(remain, cfg.duration));
this._total += elapsed;
this._loop = !!cfg.loop;
this._to = resolve([cfg.to, to, currentValue, cfg.from]);
this._from = resolve([cfg.from, currentValue, to]);
}
}
cancel() {
if (this._active) {
// update current evaluated value, for smoother animations
this.tick(Date.now());
this._active = false;
this._notify(false);
}
}
tick(date) {
const elapsed = date - this._start;
const duration = this._duration;
const prop = this._prop;
const from = this._from;
const loop = this._loop;
const to = this._to;
let factor;
this._active = from !== to && (loop || (elapsed < duration));
if (!this._active) {
this._target[prop] = to;
this._notify(true);
return;
}
if (elapsed < 0) {
this._target[prop] = from;
return;
}
factor = (elapsed / duration) % 2;
factor = loop && factor > 1 ? 2 - factor : factor;
factor = this._easing(Math.min(1, Math.max(0, factor)));
this._target[prop] = this._fn(from, to, factor);
}
wait() {
const promises = this._promises || (this._promises = []);
return new Promise((res, rej) => {
promises.push({res, rej});
});
}
_notify(resolved) {
const method = resolved ? 'res' : 'rej';
const promises = this._promises || [];
for (let i = 0; i < promises.length; i++) {
promises[i][method]();
}
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/core/core.animations.js | src/core/core.animations.js | import animator from './core.animator.js';
import Animation from './core.animation.js';
import defaults from './core.defaults.js';
import {isArray, isObject} from '../helpers/helpers.core.js';
export default class Animations {
constructor(chart, config) {
this._chart = chart;
this._properties = new Map();
this.configure(config);
}
configure(config) {
if (!isObject(config)) {
return;
}
const animationOptions = Object.keys(defaults.animation);
const animatedProps = this._properties;
Object.getOwnPropertyNames(config).forEach(key => {
const cfg = config[key];
if (!isObject(cfg)) {
return;
}
const resolved = {};
for (const option of animationOptions) {
resolved[option] = cfg[option];
}
(isArray(cfg.properties) && cfg.properties || [key]).forEach((prop) => {
if (prop === key || !animatedProps.has(prop)) {
animatedProps.set(prop, resolved);
}
});
});
}
/**
* Utility to handle animation of `options`.
* @private
*/
_animateOptions(target, values) {
const newOptions = values.options;
const options = resolveTargetOptions(target, newOptions);
if (!options) {
return [];
}
const animations = this._createAnimations(options, newOptions);
if (newOptions.$shared) {
// Going to shared options:
// After all animations are done, assign the shared options object to the element
// So any new updates to the shared options are observed
awaitAll(target.options.$animations, newOptions).then(() => {
target.options = newOptions;
}, () => {
// rejected, noop
});
}
return animations;
}
/**
* @private
*/
_createAnimations(target, values) {
const animatedProps = this._properties;
const animations = [];
const running = target.$animations || (target.$animations = {});
const props = Object.keys(values);
const date = Date.now();
let i;
for (i = props.length - 1; i >= 0; --i) {
const prop = props[i];
if (prop.charAt(0) === '$') {
continue;
}
if (prop === 'options') {
animations.push(...this._animateOptions(target, values));
continue;
}
const value = values[prop];
let animation = running[prop];
const cfg = animatedProps.get(prop);
if (animation) {
if (cfg && animation.active()) {
// There is an existing active animation, let's update that
animation.update(cfg, value, date);
continue;
} else {
animation.cancel();
}
}
if (!cfg || !cfg.duration) {
// not animated, set directly to new value
target[prop] = value;
continue;
}
running[prop] = animation = new Animation(cfg, target, prop, value);
animations.push(animation);
}
return animations;
}
/**
* Update `target` properties to new values, using configured animations
* @param {object} target - object to update
* @param {object} values - new target properties
* @returns {boolean|undefined} - `true` if animations were started
**/
update(target, values) {
if (this._properties.size === 0) {
// Nothing is animated, just apply the new values.
Object.assign(target, values);
return;
}
const animations = this._createAnimations(target, values);
if (animations.length) {
animator.add(this._chart, animations);
return true;
}
}
}
function awaitAll(animations, properties) {
const running = [];
const keys = Object.keys(properties);
for (let i = 0; i < keys.length; i++) {
const anim = animations[keys[i]];
if (anim && anim.active()) {
running.push(anim.wait());
}
}
// @ts-ignore
return Promise.all(running);
}
function resolveTargetOptions(target, newOptions) {
if (!newOptions) {
return;
}
let options = target.options;
if (!options) {
target.options = newOptions;
return;
}
if (options.$shared) {
// Going from shared options to distinct one:
// Create new options object containing the old shared values and start updating that.
target.options = options = Object.assign({}, options, {$shared: false, $animations: {}});
}
return options;
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/platform/platform.dom.js | src/platform/platform.dom.js | /**
* Chart.Platform implementation for targeting a web browser
*/
import BasePlatform from './platform.base.js';
import {_getParentNode, getRelativePosition, supportsEventListenerOptions, readUsedSize, getMaximumSize} from '../helpers/helpers.dom.js';
import {throttled} from '../helpers/helpers.extras.js';
import {isNullOrUndef} from '../helpers/helpers.core.js';
/**
* @typedef { import('../core/core.controller.js').default } Chart
*/
const EXPANDO_KEY = '$chartjs';
/**
* DOM event types -> Chart.js event types.
* Note: only events with different types are mapped.
* @see https://developer.mozilla.org/en-US/docs/Web/Events
*/
const EVENT_TYPES = {
touchstart: 'mousedown',
touchmove: 'mousemove',
touchend: 'mouseup',
pointerenter: 'mouseenter',
pointerdown: 'mousedown',
pointermove: 'mousemove',
pointerup: 'mouseup',
pointerleave: 'mouseout',
pointerout: 'mouseout'
};
const isNullOrEmpty = value => value === null || value === '';
/**
* Initializes the canvas style and render size without modifying the canvas display size,
* since responsiveness is handled by the controller.resize() method. The config is used
* to determine the aspect ratio to apply in case no explicit height has been specified.
* @param {HTMLCanvasElement} canvas
* @param {number} [aspectRatio]
*/
function initCanvas(canvas, aspectRatio) {
const style = canvas.style;
// NOTE(SB) canvas.getAttribute('width') !== canvas.width: in the first case it
// returns null or '' if no explicit value has been set to the canvas attribute.
const renderHeight = canvas.getAttribute('height');
const renderWidth = canvas.getAttribute('width');
// Chart.js modifies some canvas values that we want to restore on destroy
canvas[EXPANDO_KEY] = {
initial: {
height: renderHeight,
width: renderWidth,
style: {
display: style.display,
height: style.height,
width: style.width
}
}
};
// Force canvas to display as block to avoid extra space caused by inline
// elements, which would interfere with the responsive resize process.
// https://github.com/chartjs/Chart.js/issues/2538
style.display = style.display || 'block';
// Include possible borders in the size
style.boxSizing = style.boxSizing || 'border-box';
if (isNullOrEmpty(renderWidth)) {
const displayWidth = readUsedSize(canvas, 'width');
if (displayWidth !== undefined) {
canvas.width = displayWidth;
}
}
if (isNullOrEmpty(renderHeight)) {
if (canvas.style.height === '') {
// If no explicit render height and style height, let's apply the aspect ratio,
// which one can be specified by the user but also by charts as default option
// (i.e. options.aspectRatio). If not specified, use canvas aspect ratio of 2.
canvas.height = canvas.width / (aspectRatio || 2);
} else {
const displayHeight = readUsedSize(canvas, 'height');
if (displayHeight !== undefined) {
canvas.height = displayHeight;
}
}
}
return canvas;
}
// Default passive to true as expected by Chrome for 'touchstart' and 'touchend' events.
// https://github.com/chartjs/Chart.js/issues/4287
const eventListenerOptions = supportsEventListenerOptions ? {passive: true} : false;
function addListener(node, type, listener) {
if (node) {
node.addEventListener(type, listener, eventListenerOptions);
}
}
function removeListener(chart, type, listener) {
if (chart && chart.canvas) {
chart.canvas.removeEventListener(type, listener, eventListenerOptions);
}
}
function fromNativeEvent(event, chart) {
const type = EVENT_TYPES[event.type] || event.type;
const {x, y} = getRelativePosition(event, chart);
return {
type,
chart,
native: event,
x: x !== undefined ? x : null,
y: y !== undefined ? y : null,
};
}
function nodeListContains(nodeList, canvas) {
for (const node of nodeList) {
if (node === canvas || node.contains(canvas)) {
return true;
}
}
}
function createAttachObserver(chart, type, listener) {
const canvas = chart.canvas;
const observer = new MutationObserver(entries => {
let trigger = false;
for (const entry of entries) {
trigger = trigger || nodeListContains(entry.addedNodes, canvas);
trigger = trigger && !nodeListContains(entry.removedNodes, canvas);
}
if (trigger) {
listener();
}
});
observer.observe(document, {childList: true, subtree: true});
return observer;
}
function createDetachObserver(chart, type, listener) {
const canvas = chart.canvas;
const observer = new MutationObserver(entries => {
let trigger = false;
for (const entry of entries) {
trigger = trigger || nodeListContains(entry.removedNodes, canvas);
trigger = trigger && !nodeListContains(entry.addedNodes, canvas);
}
if (trigger) {
listener();
}
});
observer.observe(document, {childList: true, subtree: true});
return observer;
}
const drpListeningCharts = new Map();
let oldDevicePixelRatio = 0;
function onWindowResize() {
const dpr = window.devicePixelRatio;
if (dpr === oldDevicePixelRatio) {
return;
}
oldDevicePixelRatio = dpr;
drpListeningCharts.forEach((resize, chart) => {
if (chart.currentDevicePixelRatio !== dpr) {
resize();
}
});
}
function listenDevicePixelRatioChanges(chart, resize) {
if (!drpListeningCharts.size) {
window.addEventListener('resize', onWindowResize);
}
drpListeningCharts.set(chart, resize);
}
function unlistenDevicePixelRatioChanges(chart) {
drpListeningCharts.delete(chart);
if (!drpListeningCharts.size) {
window.removeEventListener('resize', onWindowResize);
}
}
function createResizeObserver(chart, type, listener) {
const canvas = chart.canvas;
const container = canvas && _getParentNode(canvas);
if (!container) {
return;
}
const resize = throttled((width, height) => {
const w = container.clientWidth;
listener(width, height);
if (w < container.clientWidth) {
// If the container size shrank during chart resize, let's assume
// scrollbar appeared. So we resize again with the scrollbar visible -
// effectively making chart smaller and the scrollbar hidden again.
// Because we are inside `throttled`, and currently `ticking`, scroll
// events are ignored during this whole 2 resize process.
// If we assumed wrong and something else happened, we are resizing
// twice in a frame (potential performance issue)
listener();
}
}, window);
// @ts-ignore until https://github.com/microsoft/TypeScript/issues/37861 implemented
const observer = new ResizeObserver(entries => {
const entry = entries[0];
const width = entry.contentRect.width;
const height = entry.contentRect.height;
// When its container's display is set to 'none' the callback will be called with a
// size of (0, 0), which will cause the chart to lose its original height, so skip
// resizing in such case.
if (width === 0 && height === 0) {
return;
}
resize(width, height);
});
observer.observe(container);
listenDevicePixelRatioChanges(chart, resize);
return observer;
}
function releaseObserver(chart, type, observer) {
if (observer) {
observer.disconnect();
}
if (type === 'resize') {
unlistenDevicePixelRatioChanges(chart);
}
}
function createProxyAndListen(chart, type, listener) {
const canvas = chart.canvas;
const proxy = throttled((event) => {
// This case can occur if the chart is destroyed while waiting
// for the throttled function to occur. We prevent crashes by checking
// for a destroyed chart
if (chart.ctx !== null) {
listener(fromNativeEvent(event, chart));
}
}, chart);
addListener(canvas, type, proxy);
return proxy;
}
/**
* Platform class for charts that can access the DOM and global window/document properties
* @extends BasePlatform
*/
export default class DomPlatform extends BasePlatform {
/**
* @param {HTMLCanvasElement} canvas
* @param {number} [aspectRatio]
* @return {CanvasRenderingContext2D|null}
*/
acquireContext(canvas, aspectRatio) {
// To prevent canvas fingerprinting, some add-ons undefine the getContext
// method, for example: https://github.com/kkapsner/CanvasBlocker
// https://github.com/chartjs/Chart.js/issues/2807
const context = canvas && canvas.getContext && canvas.getContext('2d');
// `instanceof HTMLCanvasElement/CanvasRenderingContext2D` fails when the canvas is
// inside an iframe or when running in a protected environment. We could guess the
// types from their toString() value but let's keep things flexible and assume it's
// a sufficient condition if the canvas has a context2D which has canvas as `canvas`.
// https://github.com/chartjs/Chart.js/issues/3887
// https://github.com/chartjs/Chart.js/issues/4102
// https://github.com/chartjs/Chart.js/issues/4152
if (context && context.canvas === canvas) {
// Load platform resources on first chart creation, to make it possible to
// import the library before setting platform options.
initCanvas(canvas, aspectRatio);
return context;
}
return null;
}
/**
* @param {CanvasRenderingContext2D} context
*/
releaseContext(context) {
const canvas = context.canvas;
if (!canvas[EXPANDO_KEY]) {
return false;
}
const initial = canvas[EXPANDO_KEY].initial;
['height', 'width'].forEach((prop) => {
const value = initial[prop];
if (isNullOrUndef(value)) {
canvas.removeAttribute(prop);
} else {
canvas.setAttribute(prop, value);
}
});
const style = initial.style || {};
Object.keys(style).forEach((key) => {
canvas.style[key] = style[key];
});
// The canvas render size might have been changed (and thus the state stack discarded),
// we can't use save() and restore() to restore the initial state. So make sure that at
// least the canvas context is reset to the default state by setting the canvas width.
// https://www.w3.org/TR/2011/WD-html5-20110525/the-canvas-element.html
// eslint-disable-next-line no-self-assign
canvas.width = canvas.width;
delete canvas[EXPANDO_KEY];
return true;
}
/**
*
* @param {Chart} chart
* @param {string} type
* @param {function} listener
*/
addEventListener(chart, type, listener) {
// Can have only one listener per type, so make sure previous is removed
this.removeEventListener(chart, type);
const proxies = chart.$proxies || (chart.$proxies = {});
const handlers = {
attach: createAttachObserver,
detach: createDetachObserver,
resize: createResizeObserver
};
const handler = handlers[type] || createProxyAndListen;
proxies[type] = handler(chart, type, listener);
}
/**
* @param {Chart} chart
* @param {string} type
*/
removeEventListener(chart, type) {
const proxies = chart.$proxies || (chart.$proxies = {});
const proxy = proxies[type];
if (!proxy) {
return;
}
const handlers = {
attach: releaseObserver,
detach: releaseObserver,
resize: releaseObserver
};
const handler = handlers[type] || removeListener;
handler(chart, type, proxy);
proxies[type] = undefined;
}
getDevicePixelRatio() {
return window.devicePixelRatio;
}
/**
* @param {HTMLCanvasElement} canvas
* @param {number} [width] - content width of parent element
* @param {number} [height] - content height of parent element
* @param {number} [aspectRatio] - aspect ratio to maintain
*/
getMaximumSize(canvas, width, height, aspectRatio) {
return getMaximumSize(canvas, width, height, aspectRatio);
}
/**
* @param {HTMLCanvasElement} canvas
*/
isAttached(canvas) {
const container = canvas && _getParentNode(canvas);
return !!(container && container.isConnected);
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/platform/platform.basic.js | src/platform/platform.basic.js | /**
* Platform fallback implementation (minimal).
* @see https://github.com/chartjs/Chart.js/pull/4591#issuecomment-319575939
*/
import BasePlatform from './platform.base.js';
/**
* Platform class for charts without access to the DOM or to many element properties
* This platform is used by default for any chart passed an OffscreenCanvas.
* @extends BasePlatform
*/
export default class BasicPlatform extends BasePlatform {
acquireContext(item) {
// To prevent canvas fingerprinting, some add-ons undefine the getContext
// method, for example: https://github.com/kkapsner/CanvasBlocker
// https://github.com/chartjs/Chart.js/issues/2807
return item && item.getContext && item.getContext('2d') || null;
}
updateConfig(config) {
config.options.animation = false;
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/platform/index.js | src/platform/index.js | import {_isDomSupported} from '../helpers/index.js';
import BasePlatform from './platform.base.js';
import BasicPlatform from './platform.basic.js';
import DomPlatform from './platform.dom.js';
export function _detectPlatform(canvas) {
if (!_isDomSupported() || (typeof OffscreenCanvas !== 'undefined' && canvas instanceof OffscreenCanvas)) {
return BasicPlatform;
}
return DomPlatform;
}
export {BasePlatform, BasicPlatform, DomPlatform};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/src/platform/platform.base.js | src/platform/platform.base.js |
/**
* @typedef { import('../core/core.controller.js').default } Chart
*/
/**
* Abstract class that allows abstracting platform dependencies away from the chart.
*/
export default class BasePlatform {
/**
* Called at chart construction time, returns a context2d instance implementing
* the [W3C Canvas 2D Context API standard]{@link https://www.w3.org/TR/2dcontext/}.
* @param {HTMLCanvasElement} canvas - The canvas from which to acquire context (platform specific)
* @param {number} [aspectRatio] - The chart options
*/
acquireContext(canvas, aspectRatio) {} // eslint-disable-line no-unused-vars
/**
* Called at chart destruction time, releases any resources associated to the context
* previously returned by the acquireContext() method.
* @param {CanvasRenderingContext2D} context - The context2d instance
* @returns {boolean} true if the method succeeded, else false
*/
releaseContext(context) { // eslint-disable-line no-unused-vars
return false;
}
/**
* Registers the specified listener on the given chart.
* @param {Chart} chart - Chart from which to listen for event
* @param {string} type - The ({@link ChartEvent}) type to listen for
* @param {function} listener - Receives a notification (an object that implements
* the {@link ChartEvent} interface) when an event of the specified type occurs.
*/
addEventListener(chart, type, listener) {} // eslint-disable-line no-unused-vars
/**
* Removes the specified listener previously registered with addEventListener.
* @param {Chart} chart - Chart from which to remove the listener
* @param {string} type - The ({@link ChartEvent}) type to remove
* @param {function} listener - The listener function to remove from the event target.
*/
removeEventListener(chart, type, listener) {} // eslint-disable-line no-unused-vars
/**
* @returns {number} the current devicePixelRatio of the device this platform is connected to.
*/
getDevicePixelRatio() {
return 1;
}
/**
* Returns the maximum size in pixels of given canvas element.
* @param {HTMLCanvasElement} element
* @param {number} [width] - content width of parent element
* @param {number} [height] - content height of parent element
* @param {number} [aspectRatio] - aspect ratio to maintain
*/
getMaximumSize(element, width, height, aspectRatio) {
width = Math.max(0, width || element.width);
height = height || element.height;
return {
width,
height: Math.max(0, aspectRatio ? Math.floor(width / aspectRatio) : height)
};
}
/**
* @param {HTMLCanvasElement} canvas
* @returns {boolean} true if the canvas is attached to the platform, false if not.
*/
isAttached(canvas) { // eslint-disable-line no-unused-vars
return true;
}
/**
* Updates config with platform specific requirements
* @param {import('../core/core.config.js').default} config
*/
updateConfig(config) { // eslint-disable-line no-unused-vars
// no-op
}
}
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/BasicChartWebWorker.js | test/BasicChartWebWorker.js | // This file is a basic example of using a chart inside a web worker.
// All it creates a new chart from a transferred OffscreenCanvas and then assert that the correct platform type was
// used.
// Receives messages with data of type: { type: 'initialize', canvas: OffscreenCanvas }
// Sends messages with data of types: { type: 'success' } | { type: 'error', errorMessage: string }
// eslint-disable-next-line no-undef
importScripts('../src/chart.umd.min.js');
onmessage = function(event) {
try {
const {type, canvas} = event.data;
if (type !== 'initialize') {
throw new Error('invalid message type received by worker: ' + type);
}
const chart = new Chart(canvas);
if (!(chart.platform instanceof Chart.platforms.BasicPlatform)) {
throw new Error('did not use basic platform for chart in web worker');
}
postMessage({type: 'success'});
} catch (error) {
postMessage({type: 'error', errorMessage: error.stack});
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/index.js | test/index.js | import {acquireChart, releaseChart, createMockContext, afterEvent, waitForResize, injectWrapperCSS, specsFromFixtures, triggerMouseEvent, addMatchers, releaseCharts} from 'chartjs-test-utils';
// force ratio=1 for tests on high-res/retina devices
// fixes https://github.com/chartjs/Chart.js/issues/4515
window.devicePixelRatio = 1;
window.acquireChart = acquireChart;
window.afterEvent = afterEvent;
window.releaseChart = releaseChart;
window.waitForResize = waitForResize;
window.createMockContext = createMockContext;
injectWrapperCSS();
jasmine.fixture = {
specs: specsFromFixtures
};
jasmine.triggerMouseEvent = triggerMouseEvent;
// Set a fixed time zone (and, in particular, disable Daylight Saving Time) for
// more stable test results.
window.moment.tz.setDefault('Etc/UTC');
beforeAll(() => {
// Disable colors plugin for tests.
window.Chart.defaults.plugins.colors.enabled = false;
});
beforeEach(() => {
addMatchers();
});
afterEach(() => {
releaseCharts();
});
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/integration/node/test.js | test/integration/node/test.js | import {Chart} from 'chart.js';
import {valueOrDefault} from 'chart.js/helpers';
Chart.register({
id: 'TEST_PLUGIN',
dummyValue: valueOrDefault(0, 1)
});
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/integration/node-commonjs/test.js | test/integration/node-commonjs/test.js | const {Chart} = require('chart.js');
const {valueOrDefault} = require('chart.js/helpers');
Chart.register({
id: 'TEST_PLUGIN',
dummyValue: valueOrDefault(0, 1)
});
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/integration/node-commonjs/test-auto.js | test/integration/node-commonjs/test-auto.js | const Chart = require('chart.js/auto');
const {valueOrDefault} = require('chart.js/helpers');
Chart.register({
id: 'TEST_PLUGIN',
dummyValue: valueOrDefault(0, 1)
});
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/issue-8902.js | test/fixtures/controller.line/issue-8902.js | module.exports = {
description: 'https://github.com/chartjs/Chart.js/issues/8902',
config: {
type: 'line',
data: {
labels: [1, 2, 3, 4, 5, 6, 7, 8],
datasets: [{
data: [65, 59, NaN, 48, 56, 57, 40],
borderColor: 'rgb(75, 192, 192)',
}]
},
options: {
plugins: false,
scales: {
x: {
type: 'linear',
min: 1,
max: 3
}
}
}
},
options: {
spriteText: true,
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/borderDash/value.js | test/fixtures/controller.line/borderDash/value.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [0, 5, 10, null, -10, -5],
borderColor: '#ff0000',
borderDash: [5]
},
{
// option in element (fallback)
data: [4, -5, -10, null, 10, 5],
}
]
},
options: {
elements: {
line: {
borderColor: '#00ff00',
borderDash: [10],
fill: false,
},
point: {
radius: 10,
}
},
layout: {
padding: 32
},
scales: {
x: {display: false},
y: {display: false}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/borderDash/scriptable.js | test/fixtures/controller.line/borderDash/scriptable.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [4, 5, 10, null, -10, -5],
borderDash: function(ctx) {
return ctx.datasetIndex === 0 ? [5] : [10];
}
},
{
// option in element (fallback)
data: [-4, -5, -10, null, 10, 5]
}
]
},
options: {
elements: {
line: {
borderColor: '#00ff00',
borderDash: function(ctx) {
return ctx.datasetIndex === 0 ? [5] : [10];
}
},
point: {
radius: 10,
}
},
layout: {
padding: 32
},
scales: {
x: {display: false},
y: {
display: false,
beginAtZero: true
}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/radius/value.js | test/fixtures/controller.line/radius/value.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [0, 5, 10, null, -10, -5],
pointBackgroundColor: '#0000ff',
pointRadius: 6
},
{
// option in element (fallback)
data: [4, -5, -10, null, 10, 5],
}
]
},
options: {
elements: {
line: {
fill: false,
},
point: {
backgroundColor: '#00ff00',
radius: 3,
}
},
scales: {
x: {display: false},
y: {display: false}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/radius/indexable.js | test/fixtures/controller.line/radius/indexable.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [0, 5, 10, null, -10, -5],
pointBackgroundColor: '#00ff00',
pointRadius: [
1, 2, 3, 4, 5, 6
]
},
{
// option in element (fallback)
data: [4, -5, -10, null, 10, 5],
}
]
},
options: {
elements: {
line: {
fill: false,
},
point: {
backgroundColor: '#ff0000',
radius: [
6, 5, 4, 3, 2, 1
],
}
},
scales: {
x: {display: false},
y: {display: false}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/radius/scriptable.js | test/fixtures/controller.line/radius/scriptable.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [0, 5, 10, null, -10, -5],
pointBackgroundColor: '#0000ff',
pointRadius: function(ctx) {
var value = ctx.dataset.data[ctx.dataIndex] || 0;
return value > 4 ? 10
: value > -4 ? 5
: 2;
}
},
{
// option in element (fallback)
data: [4, -5, -10, null, 10, 5],
}
]
},
options: {
elements: {
line: {
fill: false,
},
point: {
backgroundColor: '#ff0000',
radius: function(ctx) {
var value = ctx.dataset.data[ctx.dataIndex] || 0;
return value > 4 ? 2
: value > -4 ? 5
: 10;
},
}
},
scales: {
x: {display: false},
y: {
display: false,
beginAtZero: true
}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/radius/scriptable-to-value.js | test/fixtures/controller.line/radius/scriptable-to-value.js | module.exports = {
config: {
type: 'line',
data: {
labels: ['A', 'B', 'C'],
datasets: [{
data: [12, 19, 3]
}]
},
options: {
animation: {
duration: 0
},
backgroundColor: 'red',
radius: () => 20,
scales: {
x: {display: false},
y: {display: false}
}
}
},
options: {
canvas: {
height: 256,
width: 512
},
run: (chart) => {
chart.options.radius = 5;
chart.update();
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/borderDashOffset/value.js | test/fixtures/controller.line/borderDashOffset/value.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [1, 1, 1, 1, 1, 1],
borderColor: '#ff0000',
borderDash: [20],
borderDashOffset: 5.0
},
{
// option in element (fallback)
data: [0, 0, 0, 0, 0, 0]
}
]
},
options: {
elements: {
line: {
borderColor: '#00ff00',
borderDash: [20],
borderDashOffset: 0.0, // default
fill: false,
},
point: {
radius: 10,
}
},
layout: {
padding: 32
},
scales: {
x: {display: false},
y: {display: false}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/borderDashOffset/scriptable.js | test/fixtures/controller.line/borderDashOffset/scriptable.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3],
datasets: [
{
// option in dataset
data: [1, 1, 1, 1],
borderColor: '#ff0000',
borderDash: [20],
borderDashOffset: function(ctx) {
return ctx.datasetIndex === 0 ? 5.0 : 0.0;
}
},
{
// option in element (fallback)
data: [0, 0, 0, 0]
}
]
},
options: {
elements: {
line: {
borderColor: '#00ff00',
borderDash: [20],
borderDashOffset: function(ctx) {
return ctx.datasetIndex === 0 ? 5.0 : 0.0;
},
fill: false,
},
point: {
radius: 10,
}
},
layout: {
padding: 32
},
scales: {
x: {display: false},
y: {display: false}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/borderColor/value.js | test/fixtures/controller.line/borderColor/value.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [0, 5, 10, null, -10, -5],
borderColor: '#ff0000'
},
{
// option in element (fallback)
data: [4, -5, -10, null, 10, 5],
}
]
},
options: {
elements: {
line: {
borderColor: '#0000ff',
fill: false,
},
point: {
borderColor: '#0000ff',
radius: 10,
}
},
layout: {
padding: 32
},
scales: {
x: {display: false},
y: {display: false}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/borderColor/scriptable.js | test/fixtures/controller.line/borderColor/scriptable.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [4, 5, 10, null, -10, -5],
borderColor: function(ctx) {
var index = ctx.index;
return index === 0 ? '#ff0000'
: index === 1 ? '#00ff00'
: '#0000ff';
}
},
{
// option in element (fallback)
data: [-4, -5, -10, null, 10, 5]
}
]
},
options: {
elements: {
line: {
borderColor: function(ctx) {
var index = ctx.index;
return index === 0 ? '#ff0000'
: index === 1 ? '#00ff00'
: '#0000ff';
},
borderWidth: 10,
fill: false
},
point: {
borderColor: '#ff0000',
borderWidth: 10,
radius: 16
}
},
layout: {
padding: 32
},
scales: {
x: {display: false},
y: {
display: false,
beginAtZero: true
}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/pointBackgroundColor/value.js | test/fixtures/controller.line/pointBackgroundColor/value.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [0, 5, 10, null, -10, -5],
pointBackgroundColor: '#ff0000'
},
{
// option in element (fallback)
data: [4, -5, -10, null, 10, 5],
}
]
},
options: {
elements: {
line: {
fill: false,
},
point: {
backgroundColor: '#00ff00',
radius: 10,
}
},
scales: {
x: {display: false},
y: {display: false}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/pointBackgroundColor/indexable.js | test/fixtures/controller.line/pointBackgroundColor/indexable.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [0, 5, 10, null, -10, -5],
pointBackgroundColor: [
'#ff0000',
'#00ff00',
'#0000ff',
'#ffff00',
'#ff00ff',
'#000000'
]
},
{
// option in element (fallback)
data: [4, -5, -10, null, 10, 5],
}
]
},
options: {
elements: {
line: {
fill: false,
},
point: {
backgroundColor: [
'#ff88ff',
'#888888',
'#ff8800',
'#00ff88',
'#8800ff',
'#ffff88'
],
radius: 10
}
},
scales: {
x: {display: false},
y: {display: false}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/pointBackgroundColor/scriptable.js | test/fixtures/controller.line/pointBackgroundColor/scriptable.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [0, 5, 10, null, -10, -5],
pointBackgroundColor: function(ctx) {
var value = ctx.dataset.data[ctx.dataIndex] || 0;
return value > 8 ? '#ff0000'
: value > 0 ? '#00ff00'
: value > -8 ? '#0000ff'
: '#ff00ff';
}
},
{
// option in element (fallback)
data: [4, -5, -10, null, 10, 5],
}
]
},
options: {
elements: {
line: {
fill: false,
},
point: {
backgroundColor: function(ctx) {
var value = ctx.dataset.data[ctx.dataIndex] || 0;
return value > 8 ? '#ff00ff'
: value > 0 ? '#0000ff'
: value > -8 ? '#ff0000'
: '#00ff00';
},
radius: 10,
}
},
scales: {
x: {display: false},
y: {
display: false,
beginAtZero: true
}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/pointStyle/value.js | test/fixtures/controller.line/pointStyle/value.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [0, 5, 10, null, -10, -5],
pointBorderColor: '#ff0000',
pointStyle: 'star',
},
{
// option in element (fallback)
data: [4, -5, -10, null, 10, 5],
}
]
},
options: {
elements: {
line: {
fill: false,
},
point: {
backgroundColor: '#00ff00',
pointStyle: 'rect',
radius: 10,
}
},
scales: {
x: {display: false},
y: {display: false}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/pointStyle/indexable.js | test/fixtures/controller.line/pointStyle/indexable.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5, 6],
datasets: [
{
// option in dataset
data: [0, 5, 10, null, -10, -5, 0],
pointBackgroundColor: '#ff0000',
pointBorderColor: '#ff0000',
pointStyle: [
'circle',
'cross',
'crossRot',
'dash',
'line',
'rect',
false
]
},
{
// option in element (fallback)
data: [4, -5, -10, null, 10, 5, -4],
}
]
},
options: {
elements: {
line: {
fill: false,
},
point: {
backgroundColor: '#00ff00',
borderColor: '#00ff00',
pointStyle: [
'line',
'rect',
'rectRounded',
'rectRot',
'star',
'triangle'
],
radius: 10
}
},
scales: {
x: {display: false},
y: {display: false}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/pointStyle/scriptable.js | test/fixtures/controller.line/pointStyle/scriptable.js | module.exports = {
config: {
type: 'line',
data: {
labels: [0, 1, 2, 3, 4, 5],
datasets: [
{
// option in dataset
data: [0, 5, 10, null, -10, -5],
pointBackgroundColor: '#ff0000',
pointBorderColor: '#ff0000',
pointStyle: function(ctx) {
var value = ctx.dataset.data[ctx.dataIndex] || 0;
return value > 8 ? 'rect'
: value > 0 ? 'star'
: value > -8 ? 'cross'
: 'triangle';
}
},
{
// option in element (fallback)
data: [4, -5, -10, null, 10, 5],
}
]
},
options: {
elements: {
line: {
fill: false,
},
point: {
backgroundColor: '#0000ff',
borderColor: '#0000ff',
pointStyle: function(ctx) {
var value = ctx.dataset.data[ctx.dataIndex] || 0;
return value > 8 ? 'triangle'
: value > 0 ? 'cross'
: value > -8 ? 'star'
: 'rect';
},
radius: 10,
}
},
scales: {
x: {display: false},
y: {
display: false,
beginAtZero: true
}
}
}
},
options: {
canvas: {
height: 256,
width: 512
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/clip/false.js | test/fixtures/controller.line/clip/false.js | const data = [];
for (let x = 0.95; x < 1.15; x += 0.002) {
data.push({x, y: x});
}
for (let x = 0.95; x < 1.15; x += 0.001) {
data.push({x, y: 2.1 - x});
}
module.exports = {
config: {
type: 'scatter',
data: {
datasets: [{
clip: false,
radius: 8,
borderWidth: 0,
backgroundColor: (ctx) => ctx.type !== 'data' || ctx.raw.x < 1 || ctx.raw.x > 1.1 ? 'rgba(255,0,0,0.7)' : 'rgba(0,0,255,0.05)',
data
}]
},
options: {
plugins: false,
scales: {
x: {
min: 1,
max: 1.1
},
y: {
min: 1,
max: 1.1
},
},
layout: {
padding: 32
}
}
},
options: {
spriteText: true,
canvas: {
height: 240,
width: 320
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/segments/range.js | test/fixtures/controller.line/segments/range.js | function x(ctx, {min = -Infinity, max = Infinity}) {
return (ctx.p0.parsed.x >= min || ctx.p1.parsed.x >= min) && (ctx.p0.parsed.x < max && ctx.p1.parsed.x < max);
}
function y(ctx, {min = -Infinity, max = Infinity}) {
return (ctx.p0.parsed.y >= min || ctx.p1.parsed.y >= min) && (ctx.p0.parsed.y < max || ctx.p1.parsed.y < max);
}
function xy(ctx, xr, yr) {
return x(ctx, xr) && y(ctx, yr);
}
module.exports = {
config: {
type: 'line',
data: {
datasets: [{
data: [{x: 0, y: 0}, {x: 1, y: 1}, {x: 2, y: 2}, {x: 3, y: 3}, {x: 4, y: 4}, {x: 5, y: 5}, {x: 6, y: 7}, {x: 7, y: 8}],
borderColor: 'black',
segment: {
borderColor: ctx => x(ctx, {min: 3, max: 4}) ? 'red' : y(ctx, {min: 5}) ? 'green' : xy(ctx, {min: 0}, {max: 1}) ? 'blue' : undefined,
borderDash: ctx => x(ctx, {min: 3, max: 4}) || y(ctx, {min: 5}) ? [5, 5] : undefined,
}
}]
},
options: {
scales: {
x: {type: 'linear', display: false},
y: {display: false}
}
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
chartjs/Chart.js | https://github.com/chartjs/Chart.js/blob/a153556861074e827358446ec937555ac58c3d11/test/fixtures/controller.line/segments/spanGaps.js | test/fixtures/controller.line/segments/spanGaps.js | module.exports = {
config: {
type: 'line',
data: {
labels: ['a', 'b', 'c', 'd', 'e', 'f'],
datasets: [{
data: [1, 3, null, null, 2, 1],
segment: {
borderColor: ctx => ctx.p1.parsed.x > 2 ? 'red' : undefined,
borderDash: ctx => ctx.p1.parsed.x > 3 ? [6, 6] : undefined,
},
spanGaps: true
}, {
data: [0, 2, null, null, 1, 0],
segment: {
borderColor: ctx => ctx.p1.parsed.x > 2 ? 'red' : undefined,
borderDash: ctx => ctx.p1.parsed.x > 3 ? [6, 6] : undefined,
},
spanGaps: false
}]
},
options: {
borderColor: 'black',
radius: 0,
scales: {
x: {display: false},
y: {display: false}
}
}
}
};
| javascript | MIT | a153556861074e827358446ec937555ac58c3d11 | 2026-01-04T14:56:49.667758Z | false |
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