@wordpress/block-library/build/utils/waveform-utils.cjs.map

Block library for the WordPress editor.

{
  "version": 3,
  "sources": ["../../src/utils/waveform-utils.js"],
  "sourcesContent": ["/**\n * Shared utilities for waveform audio player functionality.\n * Used by both the WaveformPlayer component (editor) and view.js (frontend).\n */\nimport { colord } from 'colord';\nimport WaveformPlayerLib from '@arraypress/waveform-player';\n\n/**\n * Configuration constants.\n * Note: DEFAULT_WAVEFORM_HEIGHT should match $waveform-player-height in style.scss.\n */\nconst DEFAULT_WAVEFORM_HEIGHT = 100;\nconst DEFAULT_SEEK_LABEL = 'Seek';\n\n/**\n * Get computed style for an element, using ownerDocument for iframe compatibility.\n *\n * @param {Element} element - The element to get styles from.\n * @return {CSSStyleDeclaration} The computed style.\n */\nfunction getComputedStyle( element ) {\n\treturn element.ownerDocument.defaultView.getComputedStyle( element );\n}\n\nfunction getTopLevelGradientParts( gradientValue ) {\n\tconst match = gradientValue?.trim().match( /^[\\w-]+-gradient\\((.*)\\)$/i );\n\tif ( ! match ) {\n\t\treturn [];\n\t}\n\n\tconst parts = [];\n\tlet depth = 0;\n\tlet current = '';\n\n\tfor ( const character of match[ 1 ] ) {\n\t\tif ( character === '(' ) {\n\t\t\t++depth;\n\t\t} else if ( character === ')' ) {\n\t\t\t--depth;\n\t\t}\n\n\t\tif ( character === ',' && depth === 0 ) {\n\t\t\tparts.push( current.trim() );\n\t\t\tcurrent = '';\n\t\t\tcontinue;\n\t\t}\n\n\t\tcurrent += character;\n\t}\n\n\tif ( current.trim() ) {\n\t\tparts.push( current.trim() );\n\t}\n\n\treturn parts;\n}\n\nfunction getLeadingColorFunction( value ) {\n\tconst match = value.match( /^([\\w-]+)\\(/ );\n\tif ( ! match ) {\n\t\treturn;\n\t}\n\n\tconst supportedFunctions = [\n\t\t'color',\n\t\t'color-mix',\n\t\t'hsl',\n\t\t'hsla',\n\t\t'hwb',\n\t\t'lab',\n\t\t'lch',\n\t\t'oklab',\n\t\t'oklch',\n\t\t'rgb',\n\t\t'rgba',\n\t\t'var',\n\t];\n\tif ( ! supportedFunctions.includes( match[ 1 ].toLowerCase() ) ) {\n\t\treturn;\n\t}\n\n\tlet depth = 0;\n\tlet foundOpeningParenthesis = false;\n\tfor ( let index = 0; index < value.length; index++ ) {\n\t\tconst character = value[ index ];\n\t\tif ( character === '(' ) {\n\t\t\tfoundOpeningParenthesis = true;\n\t\t\t++depth;\n\t\t} else if ( character === ')' ) {\n\t\t\t--depth;\n\t\t}\n\n\t\tif ( foundOpeningParenthesis && depth === 0 ) {\n\t\t\treturn value.slice( 0, index + 1 );\n\t\t}\n\t}\n}\n\nfunction getColorStopValue( gradientPart ) {\n\tconst colorFunction = getLeadingColorFunction( gradientPart );\n\tif ( colorFunction ) {\n\t\treturn colorFunction;\n\t}\n\n\tconst [ possibleColor ] = gradientPart.split( /\\s+/ );\n\tif ( colord( possibleColor ).isValid() ) {\n\t\treturn possibleColor;\n\t}\n}\n\nfunction getWaveformGradientDirection( gradientValue ) {\n\tconst parts = getTopLevelGradientParts( gradientValue );\n\tconst direction = parts[ 0 ];\n\tconst angleMatch = direction?.match( /^(-?\\d+(?:\\.\\d+)?)deg$/i );\n\tif ( angleMatch ) {\n\t\tconst angle = ( ( Number( angleMatch[ 1 ] ) % 360 ) + 360 ) % 360;\n\t\tif ( angle === 90 || angle === 270 ) {\n\t\t\treturn 'horizontal';\n\t\t}\n\t\tif ( angle === 0 || angle === 180 ) {\n\t\t\treturn 'vertical';\n\t\t}\n\t\treturn 'diagonal';\n\t}\n\n\tif ( ! direction?.startsWith( 'to ' ) ) {\n\t\treturn undefined;\n\t}\n\n\tconst sideOrCorner = direction.toLowerCase().replace( /^to\\s+/, '' );\n\tconst hasHorizontalSide =\n\t\tsideOrCorner.includes( 'left' ) || sideOrCorner.includes( 'right' );\n\tconst hasVerticalSide =\n\t\tsideOrCorner.includes( 'top' ) || sideOrCorner.includes( 'bottom' );\n\n\tif ( hasHorizontalSide && hasVerticalSide ) {\n\t\treturn 'diagonal';\n\t}\n\tif ( hasHorizontalSide ) {\n\t\treturn 'horizontal';\n\t}\n\tif ( hasVerticalSide ) {\n\t\treturn 'vertical';\n\t}\n}\n\nfunction resolveColorValue( element, colorValue ) {\n\tif ( ! colorValue || colord( colorValue ).isValid() ) {\n\t\treturn colorValue;\n\t}\n\n\tconst colorResolver = element.ownerDocument.createElement( 'span' );\n\tcolorResolver.style.color = colorValue;\n\tif ( ! colorResolver.style.color ) {\n\t\treturn colorValue;\n\t}\n\telement.appendChild( colorResolver );\n\n\tconst resolvedColor = getComputedStyle( colorResolver ).color;\n\tcolorResolver.remove();\n\n\treturn resolvedColor && colord( resolvedColor ).isValid()\n\t\t? resolvedColor\n\t\t: colorValue;\n}\n\nfunction getResolvedGradientStops( element, gradientValue ) {\n\tconst stops = getWaveformGradientStops( gradientValue )\n\t\t?.map( ( colorValue ) => resolveColorValue( element, colorValue ) )\n\t\t.filter( ( colorValue ) => colord( colorValue ).isValid() );\n\n\treturn stops?.length > 1 ? stops : undefined;\n}\n\nfunction applyAlpha( colorValue, alpha ) {\n\tif ( Array.isArray( colorValue ) ) {\n\t\treturn colorValue.map( ( color ) =>\n\t\t\tcolord( color ).alpha( alpha ).toRgbString()\n\t\t);\n\t}\n\treturn colord( colorValue ).alpha( alpha ).toRgbString();\n}\n\nfunction getRepresentativeColor( colorValue ) {\n\tif ( Array.isArray( colorValue ) ) {\n\t\treturn colorValue[ colorValue.length - 1 ];\n\t}\n\treturn colorValue;\n}\n\nexport function getWaveformGradientStops( gradientValue ) {\n\tconst stops = getTopLevelGradientParts( gradientValue )\n\t\t.map( getColorStopValue )\n\t\t.filter( Boolean );\n\n\treturn stops.length > 1 ? stops : undefined;\n}\n\nfunction serializeColorValue( colorValue ) {\n\treturn Array.isArray( colorValue )\n\t\t? JSON.stringify( colorValue )\n\t\t: colorValue;\n}\n\n/**\n * Get all colors needed for the waveform player based on the element's styles.\n *\n * @param {Element} element               - The element to derive colors from.\n * @param {string}  waveformColorValue    - The base waveform color value to use.\n * @param {string}  textColorValue        - The text color value to use.\n * @param {string}  waveformGradientValue - The waveform gradient value to use.\n * @return {Object} Object containing textColor, waveformColor, progressColor.\n */\nexport function getWaveformColors(\n\telement,\n\twaveformColorValue,\n\ttextColorValue,\n\twaveformGradientValue\n) {\n\tconst textColor = textColorValue || getComputedStyle( element ).color;\n\tconst waveformGradientStops = getResolvedGradientStops(\n\t\telement,\n\t\twaveformGradientValue\n\t);\n\tconst waveformBaseColor =\n\t\twaveformGradientStops || waveformColorValue || textColor;\n\tconst waveformColor = applyAlpha( waveformBaseColor, 0.3 );\n\tconst progressColor = applyAlpha( waveformBaseColor, 0.6 );\n\tconst waveformGradient = waveformGradientStops\n\t\t? getWaveformGradientDirection( waveformGradientValue )\n\t\t: undefined;\n\n\treturn {\n\t\ttextColor,\n\t\twaveformColor,\n\t\tprogressColor,\n\t\t...( waveformGradient && { waveformGradient } ),\n\t};\n}\n\n/**\n * Create a waveform container element with the specified attributes.\n *\n * @param {Object} options                  - The options for the container.\n * @param {string} options.url              - The audio URL.\n * @param {string} options.title            - The track title.\n * @param {string} options.artist           - The track artist.\n * @param {string} options.artwork          - The track image URL.\n * @param {string} options.waveformColor    - The waveform bar color.\n * @param {string} options.progressColor    - The progress indicator color.\n * @param {string} options.waveformGradient - The waveform gradient direction.\n * @param {string} options.buttonColor      - The play button color.\n * @param {string} options.seekLabel        - Accessible label for the seek control.\n * @param {string} options.seekValueText    - Accessible value-text template for the seek control (e.g. '%1$s of %2$s').\n * @param {number} options.height           - The waveform height in pixels.\n * @param {string} options.waveformStyle    - The visualization style (bars, mirror, line, blocks, dots, seekbar).\n * @return {Element} The configured container element.\n */\nexport function createWaveformContainer( {\n\turl,\n\ttitle,\n\tartist,\n\tartwork,\n\twaveformColor,\n\tprogressColor,\n\twaveformGradient,\n\tbuttonColor,\n\tseekLabel,\n\tseekValueText,\n\theight = DEFAULT_WAVEFORM_HEIGHT,\n\twaveformStyle = 'bars',\n} ) {\n\tconst container = document.createElement( 'div' );\n\tcontainer.setAttribute( 'data-waveform-player', '' );\n\tcontainer.setAttribute( 'data-url', url );\n\tcontainer.setAttribute( 'data-height', String( height ) );\n\tcontainer.setAttribute( 'data-waveform-style', waveformStyle );\n\tcontainer.setAttribute(\n\t\t'data-waveform-color',\n\t\tserializeColorValue( waveformColor )\n\t);\n\tcontainer.setAttribute(\n\t\t'data-progress-color',\n\t\tserializeColorValue( progressColor )\n\t);\n\tif ( waveformGradient ) {\n\t\tcontainer.setAttribute( 'data-waveform-gradient', waveformGradient );\n\t}\n\tcontainer.setAttribute( 'data-button-color', buttonColor );\n\tcontainer.setAttribute(\n\t\t'data-seek-label',\n\t\tgetSeekControlLabel( seekLabel )\n\t);\n\t// The library formats the current time and duration and interpolates them\n\t// into this translated template for the seek slider's aria-valuetext.\n\tif ( seekValueText ) {\n\t\tcontainer.setAttribute( 'data-seek-value-text', seekValueText );\n\t}\n\tcontainer.setAttribute( 'data-text-color', buttonColor );\n\tcontainer.setAttribute( 'data-text-secondary-color', buttonColor );\n\n\tif ( title ) {\n\t\tcontainer.setAttribute( 'data-title', title );\n\t}\n\tif ( artist ) {\n\t\tcontainer.setAttribute( 'data-artist', artist );\n\t}\n\tif ( artwork ) {\n\t\tcontainer.setAttribute( 'data-artwork', artwork );\n\t}\n\treturn container;\n}\n\n/**\n * Apply custom styles to a generated waveform player.\n *\n * @param {Element} container                 - The generated player container.\n * @param {Object}  styles                    - The player styles.\n * @param {string}  styles.backgroundColor    - The waveform area background color.\n * @param {string}  styles.backgroundGradient - The waveform area background gradient.\n * @param {string}  styles.textColor          - The player text color.\n * @param {string}  styles.playButtonColor    - The play button color.\n * @param {string}  styles.playButtonGradient - The play button gradient.\n */\nexport function applyWaveformPlayerStyles(\n\tcontainer,\n\t{\n\t\tbackgroundColor,\n\t\tbackgroundGradient,\n\t\ttextColor,\n\t\tplayButtonColor,\n\t\tplayButtonGradient,\n\t} = {}\n) {\n\tconst waveformContainer = container.querySelector( '.waveform-container' );\n\tconst playButton = container.querySelector( '.waveform-btn' );\n\tconst playButtonBaseColor = getRepresentativeColor(\n\t\tgetResolvedGradientStops( container, playButtonGradient ) ||\n\t\t\tplayButtonColor\n\t);\n\n\tif ( playButtonBaseColor ) {\n\t\tcontainer.style.setProperty(\n\t\t\t'--wfp-button-color',\n\t\t\tplayButtonBaseColor\n\t\t);\n\t} else {\n\t\tcontainer.style.removeProperty( '--wfp-button-color' );\n\t}\n\n\tif ( textColor ) {\n\t\tcontainer.style.setProperty( '--wfp-text-color', textColor );\n\t\tcontainer.style.setProperty( '--wfp-text-secondary-color', textColor );\n\t} else {\n\t\tcontainer.style.removeProperty( '--wfp-text-color' );\n\t\tcontainer.style.removeProperty( '--wfp-text-secondary-color' );\n\t}\n\n\tif ( playButton ) {\n\t\tif ( playButtonGradient ) {\n\t\t\tplayButton.style.background = playButtonGradient;\n\t\t} else {\n\t\t\tplayButton.style.removeProperty( 'background' );\n\t\t}\n\t}\n\n\tif ( waveformContainer ) {\n\t\tif ( backgroundGradient ) {\n\t\t\twaveformContainer.style.background = backgroundGradient;\n\t\t} else if ( backgroundColor ) {\n\t\t\twaveformContainer.style.removeProperty( 'background' );\n\t\t\twaveformContainer.style.backgroundColor = backgroundColor;\n\t\t} else {\n\t\t\twaveformContainer.style.removeProperty( 'background' );\n\t\t\twaveformContainer.style.removeProperty( 'background-color' );\n\t\t}\n\t}\n}\n\n/**\n * Apply contrasting color to SVG icon paths for visibility.\n * The icons should contrast with the button background.\n *\n * @param {Element} container   - The waveform container element.\n * @param {string}  buttonColor - The button background color.\n */\nexport function styleSvgIcons( container, buttonColor ) {\n\t// Compute a contrasting color for the icons based on button brightness.\n\tconst isButtonDark = colord( buttonColor ).isDark();\n\tconst iconColor = isButtonDark ? '#ffffff' : '#000000';\n\n\tconst svgPaths = container.querySelectorAll( 'svg path' );\n\tsvgPaths.forEach( ( path ) => {\n\t\tpath.style.fill = iconColor;\n\t} );\n}\n\n/**\n * Set up play button accessibility: aria-label that toggles on play/pause.\n *\n * @param {Element} container    - The waveform container element.\n * @param {Object}  labels       - Button labels.\n * @param {string}  labels.play  - Label for the play state.\n * @param {string}  labels.pause - Label for the pause state.\n */\nexport function setupPlayButtonAccessibility(\n\tcontainer,\n\t{ play: playLabel = 'Play', pause: pauseLabel = 'Pause' } = {}\n) {\n\tconst playBtn = container.querySelector( '.waveform-btn' );\n\tif ( ! playBtn ) {\n\t\treturn;\n\t}\n\n\tplayBtn.setAttribute( 'aria-label', playLabel );\n\n\tconst onPlay = () => playBtn.setAttribute( 'aria-label', pauseLabel );\n\tconst onPause = () => playBtn.setAttribute( 'aria-label', playLabel );\n\n\tcontainer.addEventListener( 'waveformplayer:play', onPlay );\n\tcontainer.addEventListener( 'waveformplayer:pause', onPause );\n\tcontainer.addEventListener( 'waveformplayer:ended', onPause );\n\n\treturn () => {\n\t\tcontainer.removeEventListener( 'waveformplayer:play', onPlay );\n\t\tcontainer.removeEventListener( 'waveformplayer:pause', onPause );\n\t\tcontainer.removeEventListener( 'waveformplayer:ended', onPause );\n\t};\n}\n\n/**\n * Get the accessible label for the waveform seek control.\n *\n * @param {string} label - Accessible label for the seek control.\n * @return {string} The provided label or translated fallback.\n */\nfunction getSeekControlLabel( label ) {\n\treturn label || DEFAULT_SEEK_LABEL;\n}\n\n/**\n * Update the waveform seek control label.\n *\n * @param {Object} instance - The WaveformPlayer instance.\n * @param {string} label    - Accessible label for the seek control.\n */\nexport function updateSeekControlLabel( instance, label ) {\n\tconst seekLabel = getSeekControlLabel( label );\n\tinstance.options.seekLabel = seekLabel;\n\tinstance.applySeekLabel?.( seekLabel );\n\n\tconst seekControl = instance?.container?.querySelector(\n\t\t'.waveform-container'\n\t);\n\n\tif ( seekControl ) {\n\t\tseekControl.setAttribute( 'aria-label', seekLabel );\n\t}\n}\n\n/**\n * Show the current artwork as the play button background.\n *\n * @param {Element} container  - The waveform player container element.\n * @param {string}  artworkUrl - The track image URL.\n */\nexport function setupPlayButtonArtwork( container, artworkUrl ) {\n\tif ( ! artworkUrl ) {\n\t\tcontainer.classList.remove( 'has-play-button-artwork' );\n\t\tcontainer.style.removeProperty( '--wp--playlist--play-button-artwork' );\n\t\treturn;\n\t}\n\n\tcontainer.classList.add( 'has-play-button-artwork' );\n\tcontainer.style.setProperty(\n\t\t'--wp--playlist--play-button-artwork',\n\t\t`url(${ JSON.stringify( artworkUrl ) })`\n\t);\n}\n\n/**\n * Log play errors, filtering out expected AbortError.\n *\n * @param {Error} error - The error from play().\n */\nexport function logPlayError( error ) {\n\t// The browser throws AbortError when a play() promise is interrupted\n\t// by a subsequent pause() or a new audio source load (track change).\n\t// This is normal during rapid user interaction and safe to ignore.\n\tif ( error.name === 'AbortError' ) {\n\t\treturn;\n\t}\n\t// eslint-disable-next-line no-console\n\tconsole.error( 'Playlist play error:', error );\n}\n\n/**\n * Initialize a WaveformPlayer instance on an element.\n *\n * This is the shared core logic used by both the React component (editor)\n * and the Interactivity API (frontend).\n *\n * @param {Element}  element                       - The container element (must be in DOM).\n * @param {Object}   options                       - Configuration options.\n * @param {string}   options.src                   - The audio file URL.\n * @param {string}   options.title                 - The track title.\n * @param {string}   options.artist                - The artist name.\n * @param {string}   options.image                 - The track image URL.\n * @param {string}   options.imageAlt              - The track image alt text.\n * @param {string}   options.waveformColor         - The waveform color.\n * @param {string}   options.waveformGradient      - The waveform gradient.\n * @param {string}   options.textColor             - The player text color.\n * @param {string}   options.backgroundColor       - The player background color.\n * @param {string}   options.backgroundGradient    - The player background gradient.\n * @param {boolean}  options.autoPlay              - Whether to auto-play when ready.\n * @param {Function} options.onEnded               - Callback when track ends.\n * @param {Object}   options.labels                - Translated button labels.\n * @param {string}   options.waveformStyle         - Waveform style (bars, mirror, line, blocks, dots, seekbar).\n * @param {boolean}  options.showPlayButtonArtwork - Whether to show artwork on the play button.\n * @return {Object} Object with instance, container, and destroy function.\n */\nexport function initWaveformPlayer(\n\telement,\n\t{\n\t\tsrc,\n\t\ttitle,\n\t\tartist,\n\t\timage,\n\t\timageAlt,\n\t\twaveformColor: waveformColorValue,\n\t\twaveformGradient: waveformGradientValue,\n\t\ttextColor: textColorValue,\n\t\tbackgroundColor,\n\t\tbackgroundGradient,\n\t\tautoPlay,\n\t\tonEnded,\n\t\tlabels,\n\t\twaveformStyle,\n\t\tshowPlayButtonArtwork = false,\n\t}\n) {\n\tconst playerArtwork = showPlayButtonArtwork ? undefined : image;\n\n\t// Get colors from computed styles.\n\tconst { textColor, waveformColor, progressColor, waveformGradient } =\n\t\tgetWaveformColors(\n\t\t\telement,\n\t\t\twaveformColorValue,\n\t\t\ttextColorValue,\n\t\t\twaveformGradientValue\n\t\t);\n\tconst waveformGradientStops = getResolvedGradientStops(\n\t\telement,\n\t\twaveformGradientValue\n\t);\n\tconst waveformButtonColor = getRepresentativeColor(\n\t\twaveformGradientStops || waveformColorValue\n\t);\n\n\t// Create the waveform container.\n\tconst container = createWaveformContainer( {\n\t\turl: src,\n\t\ttitle,\n\t\tartist,\n\t\tartwork: playerArtwork,\n\t\twaveformColor,\n\t\tprogressColor,\n\t\twaveformGradient,\n\t\tbuttonColor: textColor,\n\t\tseekLabel: title || labels?.seek,\n\t\tseekValueText: labels?.seekValueText,\n\t\twaveformStyle,\n\t} );\n\telement.appendChild( container );\n\n\t// Initialize the WaveformPlayer library. The library reads the translated\n\t// seek label and value-text templates from the container's data attributes\n\t// and owns the seek slider's accessible label and value text.\n\tconst instance = new WaveformPlayerLib( container );\n\tif ( instance.artworkEl ) {\n\t\tinstance.artworkEl.alt = imageAlt || '';\n\t}\n\tapplyWaveformPlayerStyles( container, {\n\t\tbackgroundColor,\n\t\tbackgroundGradient,\n\t\ttextColor,\n\t\tplayButtonColor: showPlayButtonArtwork\n\t\t\t? undefined\n\t\t\t: waveformButtonColor,\n\t\tplayButtonGradient: showPlayButtonArtwork\n\t\t\t? undefined\n\t\t\t: waveformGradientValue,\n\t} );\n\n\t// Set up event handlers.\n\tlet cleanupPlayButtonAccessibility;\n\tconst handlers = {\n\t\tready: () => {\n\t\t\tstyleSvgIcons( container, waveformButtonColor || textColor );\n\t\t\tif ( showPlayButtonArtwork ) {\n\t\t\t\tsetupPlayButtonArtwork( container, image );\n\t\t\t}\n\t\t\tcleanupPlayButtonAccessibility = setupPlayButtonAccessibility(\n\t\t\t\tcontainer,\n\t\t\t\tlabels\n\t\t\t);\n\t\t\tif ( autoPlay ) {\n\t\t\t\tinstance.play()?.catch( logPlayError );\n\t\t\t}\n\t\t},\n\t\tended: () => onEnded?.(),\n\t};\n\n\tcontainer.addEventListener( 'waveformplayer:ready', handlers.ready );\n\tcontainer.addEventListener( 'waveformplayer:ended', handlers.ended );\n\n\t// Return instance, container, and cleanup function.\n\treturn {\n\t\tinstance,\n\t\tcontainer,\n\t\tdestroy: () => {\n\t\t\tcleanupPlayButtonAccessibility?.();\n\t\t\tcontainer.removeEventListener(\n\t\t\t\t'waveformplayer:ready',\n\t\t\t\thandlers.ready\n\t\t\t);\n\t\t\tcontainer.removeEventListener(\n\t\t\t\t'waveformplayer:ended',\n\t\t\t\thandlers.ended\n\t\t\t);\n\t\t\tinstance.destroy();\n\t\t\tcontainer.remove();\n\t\t},\n\t};\n}\n"],
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  "names": ["WaveformPlayerLib"]
}