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/*jslint node: true, browser: true, white: true, indent: 2, unparam: true, plusplus: true */
import $ from 'jquery';
import DOMPurify from 'dompurify';
// maintain an array of Able Player instances for use globally (e.g., for keeping prefs in sync)
// 5.0.0: this is now a Set to make it easier to create and destroy players
const ablePlayerInstances = new Set();
/**
* Performs one-time setup on `window`.
*
* Does nothing if `window` is not available, for example in SSR.
*/
function ablePlayerSetupWindow() {
if (typeof window === 'undefined') {
console.log("`window` is undefined. Skipping one-time Able Player `window` setup.");
return;
}
$(function () {
if (typeof DOMPurify === 'undefined') {
console.warn('Required dependency DOMPurify not available. Please use the full Able Player bundle which has DOMPurify built in. Or, keep using this bundle, and include DOMPurify separately.')
}
document.querySelectorAll( 'video,audio' ).forEach( ( element ) => {
if ( element.dataset.ablePlayer !== undefined ) {
new AblePlayer( $( element ) );
}
} );
});
// YouTube player support; pass ready event to jQuery so we can catch in player.
window.onYouTubeIframeAPIReady = function() {
AblePlayer.youTubeIframeAPIReady = true;
$('body').trigger('youTubeIframeAPIReady', []);
};
// If there is only one player on the page, dispatch global keydown events to it
// Otherwise, keydowwn events are handled locally (see event.js > handleEventListeners())
$(window).on('keydown',function(e) {
if (AblePlayer.hasSingleInstance()) {
const singleInstance = AblePlayer.getSingleInstance();
singleInstance.onPlayerKeyPress(e);
}
});
}
/**
* Construct the AblePlayer object.
*
* Able Player needs `window` to instantiate, so, skip the constructor if
* you are running outside the browser (for example, SSR).
*
* @param object media jQuery selector or element identifying the media.
* @param object options Optional configuration options for the player.
*/
class AblePlayer {
constructor(media, options = {}) {
if (typeof window === 'undefined') {
console.warn("`window` is undefined. Able Player needs `window` to instantiate. Skip constructing Able Player if you are running outside a browser (for example, SSR).");
return;
}
var thisObj = this;
this.media = media;
this.options = options;
if ($(media).length === 0) {
this.provideFallback();
return;
}
// Default variables assignment
// The following variables CAN be overridden with HTML attributes
// autoplay (Boolean; if present always resolves to true, regardless of value)
if ($(media).attr('autoplay') !== undefined) {
this.autoplay = true; // this value remains constant
this.okToPlay = true; // this value can change dynamically
} else {
this.autoplay = false;
this.okToPlay = false;
}
let data = $(media)[0].dataset;
// loop (Boolean; if present always resolves to true, regardless of value)
this.loop = (data.loop !== undefined) ? true : false;
// playsinline (Boolean; if present always resolves to true, regardless of value)
this.playsInline = ($(media).attr('playsinline') !== undefined) ? '1' : '0';
// poster (Boolean, indicating whether media element has a poster attribute)
this.hasPoster = ($(media).attr('poster') || data.poster) ? true : false;
this.audioPoster = options.poster ?? data.poster;
this.audioPosterAlt = options.posterAlt ?? data.posterAlt;
// start-time
var startTime = options.startTime ?? data.startTime;
var isNumeric = (typeof startTime === 'number' || (typeof startTime === 'string' && startTime.trim() !== '' && !isNaN(startTime) && isFinite(Number(startTime)))) ? true : false;
this.startTime = (startTime !== undefined && isNumeric) ? startTime : 0;
// debug
this.debug = (data.debug !== undefined && data.debug !== false) ? true : false;
// Volume
// Range is 0 to 10. Best not to crank it to avoid overpowering screen readers
this.defaultVolume = 7;
if (data.volume !== undefined && data.volume !== "") {
var volume = data.volume;
if (volume >= 0 && volume <= 10) {
this.defaultVolume = volume;
}
}
this.volume = this.defaultVolume;
let useChaptersButton = options.useChaptersButton ?? data.useChaptersButton;
// Optional Buttons
// Buttons are added to the player controller if relevant media is present
// However, in some applications it might be undesirable to show buttons
// (e.g., if chapters or transcripts are provided in an external container)
if (useChaptersButton !== undefined && useChaptersButton === false) {
this.useChaptersButton = false;
} else {
this.useChaptersButton = true;
}
let descriptionsAudible = options.descriptionsAudible ?? data.descriptionsAudible;
// Control whether text descriptions are read aloud
// set to "false" if the sole purpose of the WebVTT descriptions file
// is to integrate text description into the transcript
// set to "true" to write description text to a div
if (descriptionsAudible !== undefined && descriptionsAudible === false) {
this.readDescriptionsAloud = false;
} else {
this.readDescriptionsAloud = true;
}
// setting initial this.descVoices to an empty array
// to be populated later by getBrowserVoices
this.descVoices = [];
let descReader = options.descReader ?? data.descReader;
// Method by which text descriptions are read
// valid values of data-desc-reader are:
// 'brower' (default) - text-based audio description is handled by the browser, if supported
// 'screenreader' - text-based audio description is always handled by screen readers
// The latter may be preferable by owners of websites in languages that are not well supported
// by the Web Speech API
this.descReader = (descReader == 'screenreader') ? 'screenreader' : 'browser';
let defaultStateCaptions = options.defaultStateCaptions ?? data.stateCaptions;
let defaultStateDescriptions = options.defaultStateDescriptions ?? data.stateDescriptions;
// Default state of captions and descriptions
// This setting is overridden by user preferences, if they exist
// values for data-state-captions and data-state-descriptions are 'on' or 'off'
this.defaultStateCaptions = (defaultStateCaptions == 'off') ? 0 : 1;
this.defaultStateDescriptions = (defaultStateDescriptions == 'on') ? 1 : 0;
let defaultDescPause = options.descPauseDefault ?? data.descPauseDefault;
// Default setting for prefDescPause
// Extended description (i.e., pausing during description) is on by default
// but this settings give website owners control over that
// since they know the nature of their videos, and whether pausing is necessary
// This setting is overridden by user preferences, if they exist
this.defaultDescPause = (defaultDescPause == 'off') ? 0 : 1;
let headingLevel = options.headingLevel ?? data.headingLevel;
// Headings
// By default, an off-screen heading is automatically added to the top of the media player
// It is assigned a heading level based on context, via misc.js > getNextHeadingLevel()
// Authors can override this behavior by manually assigning a heading level using data-heading-level
// Accepted values are 1-6, or 0 which indicates "no heading"
// (i.e., author has already hard-coded a heading before the media player; Able Player doesn't need to do this)
if (headingLevel !== undefined && headingLevel !== "") {
if (/^[0-6]*$/.test(headingLevel)) { // must be a valid HTML heading level 1-6; or 0
this.playerHeadingLevel = headingLevel;
}
}
let transcriptDivLocation = options.transcriptDiv ?? data.transcriptDiv
// Transcripts
// There are three types of interactive transcripts.
// In descending of order of precedence (in case there are conflicting tags), they are:
// 1. "manual" - A manually coded external transcript (requires data-transcript-src)
// 2. "external" - Automatically generated, written to an external div (requires data-transcript-div & a valid target element)
// 3. "popup" - Automatically generated, written to a draggable, resizable popup window that can be toggled on/off with a button
// If data-include-transcript="false", there is no "popup" transcript
if (transcriptDivLocation !== undefined && transcriptDivLocation !== "" && null !== document.getElementById(transcriptDivLocation)) {
this.transcriptDivLocation = transcriptDivLocation;
} else {
this.transcriptDivLocation = null;
}
var includeTranscript = options.includeTranscript ?? data.includeTranscript;
this.hideTranscriptButton = (includeTranscript !== undefined && includeTranscript === false) ? true : false;
this.transcriptType = null;
let transcriptSrc = options.transcriptSrc ?? data.transcriptSrc;
if (transcriptSrc !== undefined) {
this.transcriptSrc = transcriptSrc;
if (this.transcriptSrcHasRequiredParts()) {
this.transcriptType = 'manual';
} else {
console.log('ERROR: Able Player transcript is missing required parts');
}
} else if ($(media).find('track[kind="captions"],track[kind="subtitles"],track:not([kind])').length > 0) {
// required tracks are present. COULD automatically generate a transcript
this.transcriptType = (this.transcriptDivLocation) ? 'external' : 'popup';
}
let lyricsMode = options.lyricsMode ?? data.lyricsMode;
// In "Lyrics Mode", line breaks in WebVTT caption files are supported in the transcript
// If false (default), line breaks are are removed from transcripts for a more seamless reading experience
// If true, line breaks are preserved, so content can be presented karaoke-style, or as lines in a poem
this.lyricsMode = (lyricsMode !== undefined && lyricsMode !== false) ? true : false;
let strictMode = options.strictMode ?? data.strictMode;
// in Strict Mode, parentheses and brackets do not get marked in bold in transcripts, and line breaks are not injected.
// In Able Player 5.1, defaults to false.
this.strictMode = (strictMode === undefined && strictMode !== true) ? false : true;
let transcriptTitle = options.transcriptTitle ?? data.transcriptTitle;
// Set Transcript Title if defined explicitly. See transcript.js.
if (transcriptTitle !== undefined && transcriptTitle !== "") {
this.transcriptTitle = transcriptTitle;
}
// Sign Language
// sign language can be a modal (default) or assigned to a div on the page.
let signDivLocation = options.signDiv ?? data.signDiv;
if (signDivLocation !== undefined && signDivLocation !== "" && null !== document.getElementById(signDivLocation)) {
this.$signDivLocation = $('#' + signDivLocation);
} else {
this.$signDivLocation = null;
}
let captionsPosition = options.captionsPosition ?? data.captionsPosition;
// Captions
// data-captions-position can be used to set the default captions position
// this is only the default, and can be overridden by user preferences
// valid values of data-captions-position are 'below' and 'overlay'
this.defaultCaptionsPosition = (captionsPosition === 'overlay') ? 'overlay' : 'below';
// Chapters
var chaptersDiv = options.chaptersDiv ?? data.chaptersDiv;
if (chaptersDiv !== undefined && chaptersDiv !== "") {
this.chaptersDivLocation = chaptersDiv;
}
let chaptersTitle = options.chaptersTitle ?? data.chaptersTitle;
if (chaptersTitle !== undefined) {
// NOTE: empty string is valid; results in no title being displayed
this.chaptersTitle = chaptersTitle;
}
let defaultChapter = options.chaptersDefault ?? data.chaptersDefault;
this.defaultChapter = (defaultChapter !== undefined && defaultChapter !== "") ? defaultChapter : null;
// Slower/Faster buttons
// valid values of data-speed-icons are 'animals' (default) and 'arrows'
// 'animals' uses turtle and rabbit; 'arrows' uses up/down arrows
let speedIcons = options.speedIcons ?? data.speedIcons;
this.speedIcons = (speedIcons === 'arrows') ? 'arrows' : 'animals';
// Seekbar
// valid values of data-seekbar-scope are 'chapter' and 'video'; will also accept 'chapters'
let seekbarScope = options.seekbarScope ?? data.seekbarScope;
this.seekbarScope = (seekbarScope === 'chapter' || seekbarScope === 'chapters') ? 'chapter' : 'video';
// YouTube converts to youtube in data attributes.
let youTubeId = options.youTubeId ?? data.youtubeId;
if (youTubeId !== undefined && youTubeId !== "") {
this.youTubeId = this.getYouTubeId(youTubeId);
if (!this.hasPoster) {
let poster = this.getYouTubePosterUrl(this.youTubeId, '640');
$(media).attr('poster', poster);
}
}
let youTubeDescId = options.youTubeDescId ?? data.youtubeDescId;
if (youTubeDescId !== undefined && youTubeDescId !== "") {
this.youTubeDescId = this.getYouTubeId(youTubeDescId);
}
let youTubeSignId = options.youTubeSignId ?? data.youtubeSignSrc;
if (youTubeSignId !== undefined && youTubeSignId !== "") {
this.youTubeSignId = this.getYouTubeId(youTubeSignId);
}
let youTubeNoCookie = options.youTubeNoCookie ?? data.youtubeNoCookie;
this.youTubeNoCookie = (youTubeNoCookie !== undefined && youTubeNoCookie) ? true : false;
// Vimeo
let vimeoId = options.vimeoId ?? data.vimeoId;
if (vimeoId !== undefined && vimeoId !== "") {
this.vimeoId = this.getVimeoId(vimeoId);
if (!this.hasPoster) {
let poster = thisObj.getVimeoPosterUrl(this.vimeoId, '1200');
$(media).attr('poster', poster);
}
}
let vimeoDescId = options.vimeoDescId ?? data.vimeoDescId;
if (vimeoDescId !== undefined && vimeoDescId !== "") {
this.vimeoDescId = this.getVimeoId(vimeoDescId);
}
let vimeoSignId = options.vimeoSignId ?? data.vimeoSignSrc;
if (vimeoSignId !== undefined && vimeoSignId !== "") {
// getVimeoId() sets a shared flag; keep the main video's value.
let mainUrlHasParams = this.vimeoUrlHasParams;
this.vimeoSignId = this.getVimeoId(vimeoSignId);
this.vimeoSignUrlHasParams = this.vimeoUrlHasParams;
this.vimeoUrlHasParams = mainUrlHasParams;
}
// Skin
let skin = options.skin ?? data.skin;
// valid values of data-skin are:
// '2020' (default as of 4.6), all buttons in one row beneath a full-width seekbar
// 'legacy', two rows of controls; seekbar positioned in available space within top row
this.skin = (skin == 'legacy') ? 'legacy' : '2020';
// Size
// width of Able Player is determined using the following order of precedence:
// 1. data-width attribute
// 2. width attribute (for video or audio, although it is not valid HTML for audio)
// 3. Intrinsic size from video (video only, determined later)
let width = options.width ?? data.width;
if (width !== undefined) {
this.playerWidth = parseInt(width);
} else if ($(media)[0].getAttribute('width')) {
// NOTE: jQuery attr() returns null for all invalid HTML attributes
// (e.g., width on <audio>)
// but it can be acessed via JavaScript getAttribute()
this.playerWidth = parseInt($(media)[0].getAttribute('width'));
} else {
this.playerWidth = null;
}
var allowFullScreen = data.allowFullscreen;
this.allowFullscreen = (allowFullScreen !== undefined && allowFullScreen === false) ? false : true;
// Define other variables that are used in fullscreen program flow
this.clickedFullscreenButton = false;
this.restoringAfterFullscreen = false;
// Seek interval
// Number of seconds to seek forward or back with Rewind & Forward buttons
// Unless specified with data-seek-interval, the default value is re-calculated in initialize.js > setSeekInterval();
// Calculation attempts to intelligently assign a reasonable interval based on media length
this.defaultSeekInterval = 10;
let seekInterval = options.seekInterval ?? data.seekInterval;
this.useFixedSeekInterval = false; // will change to true if media has valid data-seek-interval attribute
if (seekInterval !== undefined && seekInterval !== "") {
if (/^[1-9][0-9]*$/.test(seekInterval)) { // must be a whole number greater than 0
this.seekInterval = seekInterval;
this.useFixedSeekInterval = true; // do not override with calculuation
}
}
// Now Playing
// Shows "Now Playing:" plus the title of the current track above player
// Only used if there is a playlist
var showNowPlaying = options.showNowPlaying ?? data.showNowPlaying;
this.showNowPlaying = (showNowPlaying !== undefined && showNowPlaying === false) ? false : true;
// Fallback
// The data-test-fallback attribute can be used to test the fallback solution in any browser
var testFallback = options.testFallback ?? data.testFallback;
if (testFallback !== undefined && testFallback !== false) {
// 1: build error; 2: browser doesn't support media.
this.testFallback = (testFallback == '2') ? 2 : 1;
} else {
this.testFallback = false;
}
// Language
// Player language is determined given the following precedence:
// 1. The value of data-lang on the media element, if provided and a matching translation file is available
// 2. Lang attribute on <html> or <body>, if a matching translation file is available
// 3. English
// Final calculation occurs in translation.js > getTranslationText()
let lang = options.lang ?? data.lang;
this.lang = (lang !== undefined && lang !== "") ? lang.toLowerCase() : null;
// Metadata Tracks
let metaType = options.metaType ?? data.metaType;
if (metaType !== undefined && metaType !== "") {
this.metaType = metaType;
}
let metaDiv = options.metaDiv ?? data.metaDiv;
if (metaDiv !== undefined && metaDiv !== "") {
this.metaDiv = metaDiv;
}
// Search
// conducting a search requires an external div in which to write the results
let searchDiv = options.searchDiv ?? data.searchDiv;
if (searchDiv !== undefined && searchDiv !== "") {
this.searchDiv = searchDiv;
// Search term (optional; could be assigned later in a JavaScript application)
let searchString = options.search ?? data.search;
if (searchString !== undefined && searchString !== "") {
this.searchString = searchString;
}
// Search Language
let searchLang = options.searchLang ?? data.searchLang;
this.searchLang = (searchLang !== undefined && searchLang !== "") ? searchLang : null;
// Search option: Ignore capitalization in search terms
let searchIgnoreCaps = options.searchIgnoreCaps ?? data.searchIgnoreCaps;
this.searchIgnoreCaps = (searchIgnoreCaps !== undefined && searchIgnoreCaps !== false) ? true : false;
}
let hideControls = options.hideControls ?? data.hideControls;
// Hide controls when video starts playing
// They will reappear again when user presses a key or moves the mouse
// As of v4.0, controls are hidden automatically on playback in fullscreen mode
if (hideControls !== undefined && hideControls !== false) {
this.hideControls = true;
this.hideControlsOriginal = true; // a copy of hideControls, since the former may change if user enters full screen mode
} else {
this.hideControls = false;
this.hideControlsOriginal = false;
}
// Steno mode
// Enable support for Able Player keyboard shortcuts in textaarea fields
// so users can control the player while transcribing
let stenoMode = options.stenoMode ?? data.stenoMode;
if (stenoMode !== undefined && stenoMode !== false) {
this.stenoMode = true;
// Add support for stenography in an iframe via data-steno-iframe-id
let stenoIframeId = options.stenoIframeId ?? data.stenoIframeId;
if (stenoIframeId !== undefined && stenoIframeId !== "") {
this.stenoFrameId = stenoIframeId;
this.$stenoFrame = $('#' + this.stenoFrameId);
if (!(this.$stenoFrame.length)) {
// iframe not found
this.stenoFrameId = null;
this.$stenoFrame = null;
}
} else {
this.stenoFrameId = null;
this.$stenoFrame = null;
}
} else {
this.stenoMode = false;
this.stenoFrameId = null;
this.$stenoFrame = null;
}
// Define built-in variables that CANNOT be overridden with HTML attributes
this.setDefaults();
////////////////////////////////////////
// End assignment of default variables
////////////////////////////////////////
this.ableIndex = AblePlayer.nextIndex;
AblePlayer.nextIndex += 1;
this.title = $(media).attr('title');
// populate translation object with localized versions of all labels and prompts
this.tt = {};
try {
this.getTranslationText();
this.setup();
} catch (e) {
console.warn('Error setting up translations:', e);
this.provideFallback();
}
ablePlayerInstances.add(this);
}
static getActiveDOMElement() {
var activeElement = document.activeElement;
// For shadow DOMs we need to keep digging down through the DOMs
while (activeElement.shadowRoot && activeElement.shadowRoot.activeElement) {
activeElement = activeElement.shadowRoot.activeElement;
}
return activeElement;
}
static localGetElementById(element, id) {
if (element.getRootNode) {
// Use getRootNode() and querySelector() where supported (for shadow DOM support)
return $(element.getRootNode().querySelector('#' + id));
} else {
// If getRootNode is not supported it should be safe to use document.getElementById (since there is no shadow DOM support)
return $(document.getElementById(id));
}
}
static hasSingleInstance() { return AblePlayer.ablePlayerInstances.size === 1; }
static getSingleInstance() {
// If there are actually more instances, this returns the first one
for (const instance of AblePlayer.ablePlayerInstances) {
return instance;
}
}
setup() {
var thisObj = this;
this.initializing = true; // will remain true until entire sequence of function calls is complete
this.reinitialize().then(function () {
if (!thisObj.player) {
// No player for this media, show last-line fallback.
thisObj.provideFallback();
} else {
thisObj.setupInstance().then(function () {
thisObj.setupInstancePlaylist();
if (thisObj.hasPlaylist) {
// for playlists, recreatePlayer() is called from within cuePlaylistItem()
} else {
thisObj.recreatePlayer().then(function () {
thisObj.initializing = false;
thisObj.playerCreated = true; // remains true until browser is refreshed
});
}
});
}
});
}
/**
* Removes this player from the global instance list.
*
* You probably want to call this during/after removing a player from the
* DOM. This avoids memory leaks, and allows the event handling to have the
* correct count of how many players are actually on the page.
*/
dispose() {
AblePlayer.ablePlayerInstances.delete(this);
// Look for various dialogs tied to this instance. Elements associated
// with these are appended to the body, and they need to be
// `.remove()`d here.
const dialogs = [
this.captionPrefsDialog,
this.descPrefsDialog,
this.keyboardPrefsDialog,
this.transcriptPrefsDialog,
this.transcriptResizeDialog,
this.signResizeDialog,
];
for (const dialog of dialogs) {
if (!dialog) {
continue;
}
if (dialog.modal) {
dialog.modal.remove();
}
if (dialog.overlay) {
dialog.overlay.remove();
}
}
if (AblePlayer.ablePlayerInstances.size === 0 && AblePlayer.preferencesDialog) {
if (AblePlayer.preferencesDialog.modal) {
AblePlayer.preferencesDialog.modal.remove();
}
if (AblePlayer.preferencesDialog.dialog && AblePlayer.preferencesDialog.dialog.overlay) {
AblePlayer.preferencesDialog.dialog.overlay.remove();
}
AblePlayer.preferencesDialog = null;
}
}
};
// Index to increment every time new player is created.
// 5.0.0: this is now only used to generate unique IDs. Otherwise use hasSingleInstance.
AblePlayer.nextIndex = 0;
AblePlayer.ablePlayerSetupWindow = ablePlayerSetupWindow;
AblePlayer.youTubeIframeAPIReady = false;
AblePlayer.loadingYouTubeIframeAPI = false;
AblePlayer.ablePlayerInstances = ablePlayerInstances;
AblePlayer.preferencesDialog = null;
export default AblePlayer;
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