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1613 lines (1456 loc) · 55.7 KB
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import $ from 'jquery';
import DOMPurify from 'dompurify';
import validate from './validate';
import AccessibleSlider from './slider';
function addBuildplayerFunctions(AblePlayer) {
AblePlayer.prototype.injectPlayerCode = function() {
// create and inject surrounding HTML structure
// If iOS & video:
// iOS does not support any of the player's functionality - everything plays in its own player
// Therefore, AblePlayer is not loaded & all functionality is disabled
// (this all determined. If this is iOS && video, this function is never called)
var captionsContainer;
// Wrappers, from inner to outer:
// $mediaContainer - contains the original media element
// $ableDiv - contains the media player and all its objects (e.g., captions, controls, descriptions)
// $ableWrapper - contains additional widgets (e.g., transcript window, sign window)
this.$mediaContainer = this.$media.wrap('<div class="able-media-container"></div>').parent();
this.$ableDiv = this.$mediaContainer.wrap('<div class="able"></div>').parent();
this.$ableWrapper = this.$ableDiv.wrap('<div class="able-wrapper"></div>').parent();
this.$ableWrapper.addClass('able-skin-' + this.skin);
if (this.mediaType === 'video') {
// youtube adds its own big play button
// don't show ours *unless* video has a poster attribute
// (which obstructs the YouTube poster & big play button)
if (this.player !== 'youtube' || this.hasPoster) {
this.injectBigPlayButton();
}
}
// add container that captions or description will be appended to
// Note: new Jquery object must be assigned _after_ wrap, hence the temp captionsContainer variable
captionsContainer = $('<div>');
captionsContainer.addClass('able-captions-container');
if (this.mediaType === 'video') {
captionsContainer.addClass('able-vidcap-container');
} else if (this.mediaType === 'audio') {
captionsContainer.addClass('able-audcap-container');
// hide this by default. It will be shown if captions are available
captionsContainer.addClass('captions-off');
}
this.injectPlayerControlArea(); // this may need to be injected after captions???
this.$captionsContainer = this.$mediaContainer.wrap(captionsContainer).parent();
this.injectAlert(this.$ableDiv);
this.injectPlaylist();
this.injectAudioPoster();
// Do this last, as it should be prepended to the top of this.$ableDiv
// after everything else has prepended
this.injectOffscreenHeading();
};
AblePlayer.prototype.injectAudioPoster = function() {
if ( this.mediaType === 'audio' && this.hasPoster ) {
const audioPoster = DOMPurify.sanitize(this.audioPoster);
const audioPosterAlt = DOMPurify.sanitize(this.audioPosterAlt);
let audioPosterImg = document.createElement( 'img' );
audioPosterImg.setAttribute( 'src', audioPoster );
audioPosterImg.setAttribute( 'alt', audioPosterAlt );
this.$audioWrapper = this.$playerDiv.wrap( '<div class="able-audio-wrapper">' ).parent();
this.$audioWrapper.prepend( audioPosterImg );
}
}
AblePlayer.prototype.injectOffscreenHeading = function () {
// Inject an offscreen heading to the media container.
// If heading hasn't already been manually defined via data-heading-level,
// automatically assign a level that is one level deeper than the closest parent heading
// as determined by getNextHeadingLevel()
var headingType;
if (this.playerHeadingLevel == '0') {
// do NOT inject a heading (at author's request)
} else {
if (typeof this.playerHeadingLevel === 'undefined') {
this.playerHeadingLevel = this.getNextHeadingLevel(this.$ableDiv); // returns in integer 1-6
}
headingType = 'h' + this.playerHeadingLevel.toString();
this.headingDiv = document.createElement( headingType );
this.$ableDiv.prepend(this.headingDiv);
this.headingDiv.classList.add('able-offscreen');
this.headingDiv.textContent = this.translate( 'playerHeading', 'Media player' );
}
};
AblePlayer.prototype.injectBigPlayButton = function () {
var thisObj = this;
this.$bigPlayButton = $('<button>', {
'class': 'able-big-play-button',
'aria-hidden': false,
'aria-label': this.translate( 'play', 'Play' ),
'type': 'button',
'tabindex': 0
});
this.getIcon( this.$bigPlayButton, 'play' );
this.$bigPlayButton.on( 'click', function () {
thisObj.handlePlay();
});
this.$mediaContainer.append(this.$bigPlayButton);
};
AblePlayer.prototype.injectPlayerControlArea = function () {
this.$playerDiv = $('<div>', {
'class' : 'able-player',
'role' : 'region',
'aria-label' : ( 'audio' === this.mediaType ) ? this.translate( 'audioPlayer', 'audio player' ) : this.translate( 'videoPlayer', 'video player' )
});
this.$playerDiv.addClass('able-' + this.mediaType);
if (this.hasPlaylist && this.showNowPlaying) {
this.$nowPlayingDiv = $('<div>',{
'class' : 'able-now-playing',
'aria-live' : 'assertive',
'aria-atomic': 'true'
});
}
this.$controllerDiv = $('<div>',{
'class' : 'able-controller'
});
this.$controllerDiv.addClass('able-' + this.iconColor + '-controls');
this.$statusBarDiv = $('<div>',{
'class' : 'able-status-bar'
});
this.$timer = $('<span>',{
'class' : 'able-timer'
});
this.$elapsedTimeContainer = $('<span>',{
'class': 'able-elapsedTime',
text: '0:00'
});
this.$durationContainer = $('<span>',{
'class': 'able-duration'
});
this.$durationSeparator = $('<span>',{
'class': 'able-timer-separator',
'text': ' / '
});
this.$timer.append(this.$elapsedTimeContainer).append(this.$durationSeparator).append(this.$durationContainer);
this.$speed = $('<span>',{
'class' : 'able-speed',
'aria-live' : 'assertive',
'aria-atomic' : 'true'
}).text(this.translate( 'speed', 'Speed' ) + ': 1x');
this.$status = $('<span>',{
'class' : 'able-status',
'aria-live' : 'polite'
});
// Put everything together.
this.$statusBarDiv.append(this.$timer, this.$speed, this.$status);
if (this.showNowPlaying) {
this.$playerDiv.append(this.$nowPlayingDiv, this.$controllerDiv, this.$statusBarDiv);
} else {
this.$playerDiv.append(this.$controllerDiv, this.$statusBarDiv);
}
if (this.mediaType === 'video') {
// the player controls go after the media & captions
this.$ableDiv.append(this.$playerDiv);
} else {
// the player controls go before the media & captions
this.$ableDiv.prepend(this.$playerDiv);
}
};
AblePlayer.prototype.injectTextDescriptionArea = function () {
// create a div for writing description text
this.$descDiv = $('<div>',{
'class': 'able-descriptions'
});
// Add ARIA so description will be announced by screen readers
// Later (in description.js > showDescription()),
// if browser supports Web Speech API and this.descMethod === 'browser'
// these attributes will be removed
this.$descDiv.attr({
'aria-live': 'assertive',
'aria-atomic': 'true'
});
// Start off with description hidden.
// It will be exposed conditionally within description.js > initDescription()
this.$descDiv.hide();
this.$ableDiv.append(this.$descDiv);
};
AblePlayer.prototype.getDefaultWidth = function(which) {
let viewportMaxwidth = window.innerWidth;
// return default width of resizable elements
// these values are somewhat arbitrary, but seem to result in good usability
// if users disagree, they can resize (and resposition) them
if (which === 'transcript') {
return ( viewportMaxwidth <= 450 ) ? viewportMaxwidth : 450;
} else if (which === 'sign') {
return ( viewportMaxwidth <= 400 ) ? viewportMaxwidth : 400;
}
};
/**
* Reposition draggable windows when switched into fullscreen.
*
* @param {string} which 'transcript' or 'sign'.
*/
AblePlayer.prototype.rePositionDraggableWindow = function (which) {
let preferences, $window;
preferences = this.getPref();
$window = ( which === 'transcript' ) ? this.$transcriptArea : this.$signWindow;
if ( which === 'transcript' && $window ) {
if (typeof preferences.transcript !== 'undefined') {
this.prevTranscriptPosition = preferences.transcript;
}
$window.css({
'top': 0,
'left': 0
});
} else if ( 'sign' === which && $window ) {
if (typeof preferences.sign !== 'undefined') {
this.prevSignPosition = preferences.sign;
}
$window.css({
'top': 0,
'right': 0,
'left': 'auto'
});
}
}
AblePlayer.prototype.positionDraggableWindow = function (which, width) {
// which is either 'transcript' or 'sign'
var preferences, preferencePos, $window, windowPos, viewportWidth, windowWidth;
preferences = this.getPref();
$window = ( which === 'transcript' ) ? this.$transcriptArea : this.$signWindow;
if ( ! $window ) {
return;
}
if (which === 'transcript') {
if (typeof preferences.transcript !== 'undefined') {
preferencePos = preferences.transcript;
}
if ( this.prevTranscriptPosition ) {
preferencePos = this.prevTranscriptPosition;
this.prevTranscriptPosition = false;
}
} else if (which === 'sign') {
if (typeof preferences.sign !== 'undefined') {
preferencePos = preferences.sign;
}
if ( this.prevSignPosition ) {
preferencePos = this.prevSignPosition;
this.prevSignPosition = false;
}
}
if (typeof preferencePos !== 'undefined' && !($.isEmptyObject(preferencePos))) {
// position window using stored values from preferences
$window.css({
'position': preferencePos['position'],
'width': preferencePos['width'],
'z-index': preferencePos['zindex']
});
if (preferencePos['position'] === 'absolute') {
$window.css({
'top': preferencePos['top'],
'left': preferencePos['left']
});
// Check whether the window is above the top of the viewport.
let topPosition = $window.offset().top;
let leftPosition = $window.offset().left;
viewportWidth = window.innerWidth;
windowWidth = $window.width();
if ( topPosition < 0 ) {
$window.css({
'top': preferencePos['top'] - topPosition
});
}
// If draggable window is off screen to the left.
if ( leftPosition < 0 && ! this.restoringAfterFullscreen ) {
$window.css({
'left': preferencePos['left'] - leftPosition
});
}
// If draggable window is off screen to the right.
if ( viewportWidth - leftPosition < 30 ) {
$window.css({
'left': viewportWidth - windowWidth
});
}
}
// since preferences are not page-specific, z-index needs may vary across different pages
this.updateZIndex(which);
} else {
// position window using default values
windowPos = this.getOptimumPosition(which, width);
if (typeof width === 'undefined') {
width = this.getDefaultWidth(which);
}
$window.css({
'position': windowPos[0],
'width': width,
'z-index': windowPos[3]
});
if (windowPos[0] === 'absolute') {
$window.css({
'top': windowPos[1] + 'px',
'left': windowPos[2] + 'px',
});
}
}
};
AblePlayer.prototype.getOptimumPosition = function (targetWindow, targetWidth) {
// returns optimum position for targetWindow, as an array with the following structure:
// 0 - CSS position ('absolute' or 'relative')
// 1 - top
// 2 - left
// 3 - zindex (if not default)
// targetWindow is either 'transcript' or 'sign'
// if there is room to the right of the player, position element there
// else if there is room the left of the player, position element there
// else position element beneath player
var gap, position, ableWidth, ableOffset, ableLeft, windowWidth, otherWindowWidth;
if (typeof targetWidth === 'undefined') {
targetWidth = this.getDefaultWidth(targetWindow);
}
gap = 5; // number of pixels to preserve between Able Player objects
position = []; // position, top, left
ableWidth = this.$ableDiv.width();
ableOffset = this.$ableDiv.offset();
ableLeft = ableOffset.left;
windowWidth = $(window).width();
otherWindowWidth = 0; // width of other visiable draggable windows will be added to this
if (targetWindow === 'transcript') {
// If placing the transcript window, check position of sign window first.
if (typeof this.$signWindow !== 'undefined' && (this.$signWindow.is(':visible'))) {
otherWindowWidth = this.$signWindow.width() + gap;
}
} else if (targetWindow === 'sign') {
// If placing the sign window, check position of transcript window first.
if (typeof this.$transcriptArea !== 'undefined' && (this.$transcriptArea.is(':visible'))) {
otherWindowWidth = this.$transcriptArea.width() + gap;
}
}
if (targetWidth < (windowWidth - (ableLeft + ableWidth + gap + otherWindowWidth))) {
// there's room to the left of $ableDiv
position[0] = 'absolute';
position[1] = 0;
position[2] = ableWidth + otherWindowWidth + gap;
} else if (targetWidth + gap < ableLeft) {
// there's room to the right of $ableDiv
position[0] = 'absolute';
position[1] = 0;
position[2] = ableLeft - targetWidth - gap;
} else {
// position element below $ableDiv
position[0] = 'relative';
// no need to define top, left, or z-index
}
return position;
};
AblePlayer.prototype.injectAlert = function ($container) {
// inject two alerts, one visible for all users and one for screen reader users only
this.$alertBox = $('<div role="alert"></div>');
this.$alertBox.addClass('able-alert');
this.$alertBox.hide();
var $alertText = $( '<span></span>' );
$alertText.appendTo(this.$alertBox);
var $alertDismiss = $('<button type="button"></button>' );
$alertDismiss.attr( 'aria-label', this.translate( 'dismissButton', 'Dismiss' ) );
this.getIcon( $alertDismiss, 'close' );
$alertDismiss.appendTo(this.$alertBox);
$alertDismiss.on( 'click', function(e) {
$(this).parent('div').hide();
});
this.$alertBox.appendTo($container);
if ( ! this.$srAlertBox ) {
this.$srAlertBox = $('<div role="alert"></div>');
this.$srAlertBox.addClass('able-screenreader-alert');
this.$srAlertBox.appendTo($container);
}
};
AblePlayer.prototype.injectPlaylist = function () {
if (this.playlistEmbed === true) {
// move playlist into player, immediately before statusBarDiv
var playlistClone = this.$playlistDom.clone();
playlistClone.insertBefore(this.$statusBarDiv);
// Update to the new playlist copy.
this.$playlist = playlistClone.find('li');
}
};
AblePlayer.prototype.createPopup = function (which, tracks) {
// Create popup menu and append to player
// 'which' parameter is either 'captions', 'chapters', 'prefs', 'transcript-window' or 'sign-window'
// 'tracks', if provided, is a list of tracks to be used as menu items
var thisObj, $menu, includeMenuItem, i, $menuItem, prefCat, whichPref, hasDefault, track,
windowOptions, $thisItem, $prevItem, $nextItem, hasDescription, hasTranscript;
thisObj = this;
$menu = $('<ul>',{
'id': this.mediaId + '-' + which + '-menu',
'class': 'able-popup',
'role': 'menu'
}).hide();
if (which === 'captions') {
$menu.addClass('able-popup-captions');
}
// Populate menu with menu items
if (which === 'prefs') {
if (this.prefCats.length > 1) {
for (i = 0; i < this.prefCats.length; i++) {
prefCat = this.prefCats[i];
hasDescription = ( thisObj.hasDescTracks || thisObj.hasOpenDesc || thisObj.hasClosedDesc ) ? true : false;
hasTranscript = ( thisObj.transcriptType === null ) ? false : true;
// If this player does not have descriptions or transcripts, do not output that option preferences.
if ( prefCat === 'descriptions' && ! hasDescription || prefCat === 'transcript' && ! hasTranscript ) {
continue;
}
$menuItem = $('<li></li>',{
'role': 'menuitem',
'tabindex': '-1'
});
if (prefCat === 'captions') {
$menuItem.text( this.translate( 'prefMenuCaptions', 'Captions' ) );
} else if (prefCat === 'descriptions') {
$menuItem.text( this.translate( 'prefMenuDescriptions', 'Descriptions' ) );
} else if (prefCat === 'keyboard') {
$menuItem.text( this.translate( 'prefMenuKeyboard', 'Keyboard' ) );
} else if (prefCat === 'transcript') {
$menuItem.text( this.translate( 'prefMenuTranscript', 'Transcript' ) );
}
$menuItem.on('click',function() {
whichPref = $(this).text();
thisObj.showingPrefsDialog = true;
thisObj.setFullscreen(false);
if (whichPref === thisObj.translate( 'prefMenuCaptions', 'Captions' ) ) {
thisObj.showPrefsDialog('captions');
} else if (whichPref === thisObj.translate( 'prefMenuDescriptions', 'Descriptions' ) ) {
thisObj.showPrefsDialog('descriptions');
} else if (whichPref === thisObj.translate( 'prefMenuKeyboard', 'Keyboard' ) ) {
thisObj.showPrefsDialog('keyboard');
} else if (whichPref === thisObj.translate( 'prefMenuTranscript', 'Transcript' ) ) {
thisObj.showPrefsDialog('transcript');
}
thisObj.closePopups();
thisObj.showingPrefsDialog = false;
});
$menu.append($menuItem);
}
this.$prefsButton.attr('data-prefs-popup','menu');
} else if (this.prefCats.length == 1) {
// only 1 category, so don't create a popup menu.
// Instead, open dialog directly when user clicks Prefs button
this.$prefsButton.attr('data-prefs-popup',this.prefCats[0]);
}
} else if (which === 'captions' || which === 'chapters') {
hasDefault = false;
for (i = 0; i < tracks.length; i++) {
track = tracks[i];
if (which === 'captions' && this.player === 'html5' && typeof track.cues === 'undefined') {
includeMenuItem = false;
} else {
includeMenuItem = true;
}
if (includeMenuItem) {
$menuItem = $('<li></li>',{
'role': 'menuitemradio',
'tabindex': '-1',
'lang': track.language
});
if (track.def && this.prefCaptions == 1) {
$menuItem.attr('aria-checked','true');
hasDefault = true;
} else {
$menuItem.attr('aria-checked','false');
}
// Get a label using track data
if (which == 'captions') {
$menuItem.text(track.label);
$menuItem.on('click',this.getCaptionClickFunction(track));
} else if (which == 'chapters') {
$menuItem.text(this.flattenCueForCaption(track) + ' - ' + this.formatSecondsAsColonTime(track.start));
$menuItem.on('click',this.getChapterClickFunction(track.start));
}
$menu.append($menuItem);
}
}
if (which === 'captions') {
// add a 'captions off' menu item
$menuItem = $('<li></li>',{
'role': 'menuitemradio',
'tabindex': '-1',
}).text( this.translate( 'captionsOff', 'Captions off' ) );
if (this.prefCaptions === 0) {
$menuItem.attr('aria-checked','true');
hasDefault = true;
} else {
$menuItem.attr('aria-checked','false');
}
$menuItem.on('click',this.getCaptionOffFunction());
$menu.append($menuItem);
}
} else if (which === 'transcript-window' || which === 'sign-window') {
windowOptions = [];
windowOptions.push({
'name': 'move',
'label': this.translate( 'windowMove', 'Move' )
});
windowOptions.push({
'name': 'resize',
'label': this.translate( 'windowResize', 'Resize' )
});
windowOptions.push({
'name': 'close',
'label': this.translate( 'closeButtonLabel', 'Close' )
});
for (i = 0; i < windowOptions.length; i++) {
$menuItem = $('<li></li>',{
'role': 'menuitem',
'tabindex': '-1',
'data-choice': windowOptions[i].name
});
$menuItem.text(windowOptions[i].label);
$menuItem.on('click',function(e) {
e.stopPropagation();
if (typeof e.button !== 'undefined' && e.button !== 0) {
// this was a mouse click (if click is triggered by keyboard, e.button is undefined)
// and the button was not a left click (left click = 0)
// therefore, ignore this click
return false;
}
if ( !thisObj.finishingDrag ) {
thisObj.handleMenuChoice(which.substring(0, which.indexOf('-')), $(this).attr('data-choice'), e);
}
});
$menu.append($menuItem);
}
}
// assign default item, if there isn't one already
if (which === 'captions' && !hasDefault) {
// check the menu item associated with the default language
// as determined in control.js > syncTrackLanguages()
if ($menu.find('li[lang=' + this.captionLang + ']')) {
// a track exists for the default language. Check that item in the menu
$menu.find('li[lang=' + this.captionLang + ']').attr('aria-checked','true');
} else {
// check the last item (captions off)
$menu.find('li').last().attr('aria-checked','true');
}
} else if (which === 'chapters') {
if ($menu.find('li:contains("' + this.defaultChapter + '")')) {
$menu.find('li:contains("' + this.defaultChapter + '")').attr('aria-checked','true').addClass('able-focus');
} else {
$menu.find('li').first().attr('aria-checked','true').addClass('able-focus');
}
}
// add keyboard handlers for navigating within popups
$menu.on('keydown',function (e) {
$thisItem = $(this).find('li:focus');
if ($thisItem.is(':first-child')) {
// this is the first item in the menu
$prevItem = $(this).find('li').last(); // wrap to bottom
$nextItem = $thisItem.next();
} else if ($thisItem.is(':last-child')) {
// this is the last Item
$prevItem = $thisItem.prev();
$nextItem = $(this).find('li').first(); // wrap to top
} else {
$prevItem = $thisItem.prev();
$nextItem = $thisItem.next();
}
if (e.key === 'Tab') {
if (e.shiftKey) {
$thisItem.removeClass('able-focus');
$prevItem.trigger('focus').addClass('able-focus');
} else {
$thisItem.removeClass('able-focus');
$nextItem.trigger('focus').addClass('able-focus');
}
} else if (e.key === 'ArrowDown' || e.key === 'ArrowRight') {
$thisItem.removeClass('able-focus');
$nextItem.trigger('focus').addClass('able-focus');
} else if (e.key == 'ArrowUp' || e.key === 'ArrowLeft') {
$thisItem.removeClass('able-focus');
$prevItem.trigger('focus').addClass('able-focus');
} else if (e.key === ' ' || e.key === 'Enter') {
$thisItem.trigger( 'click' );
} else if (e.key === 'Escape') {
$thisItem.removeClass('able-focus');
thisObj.closePopups();
e.stopPropagation();
}
e.preventDefault();
});
this.$controllerDiv.append($menu);
return $menu;
};
AblePlayer.prototype.closePopups = function () {
var thisObj = this;
if (this.chaptersPopup && this.chaptersPopup.is(':visible')) {
this.chaptersPopup.hide();
this.$chaptersButton.attr('aria-expanded','false').trigger('focus');
}
if (this.captionsPopup && this.captionsPopup.is(':visible')) {
this.captionsPopup.hide();
this.$ccButton.attr('aria-expanded', 'false');
this.waitThenFocus(this.$ccButton);
}
if (this.prefsPopup && this.prefsPopup.is(':visible') ) {
this.prefsPopup.hide();
// restore menu items to their original state
this.prefsPopup.find('li').removeClass('able-focus').attr('tabindex','-1');
this.$prefsButton.attr('aria-expanded', 'false');
if (!this.showingPrefsDialog) {
this.waitThenFocus(thisObj.$prefsButton);
}
}
if (this.$volumeSlider && this.$volumeSlider.is(':visible')) {
this.$volumeSlider.hide().attr('aria-hidden','true');
this.$volumeButton.attr('aria-expanded', 'false').trigger('focus');
}
if (this.$transcriptPopup && this.$transcriptPopup.is(':visible')) {
this.$transcriptPopup.hide();
// restore menu items to their original state
this.$transcriptPopup.find('li').removeClass('able-focus').attr('tabindex','-1');
this.$transcriptPopupButton.attr('aria-expanded','false').trigger('focus');
}
if (this.$signPopup && this.$signPopup.is(':visible')) {
this.$signPopup.hide();
// restore menu items to their original state
this.$signPopup.find('li').removeClass('able-focus').attr('tabindex','-1');
this.$signPopupButton.attr('aria-expanded','false').trigger('focus');
}
};
AblePlayer.prototype.setupPopups = function (which) {
// Create and fill in the popup menu forms for various controls.
// parameter 'which' is passed if refreshing content of an existing popup ('captions' or 'chapters')
// If which is undefined, automatically setup 'captions', 'chapters', and 'prefs' popups
// However, only setup 'transcript-window' and 'sign-window' popups if passed as value of which
var popups, i, tracks;
popups = [];
if (typeof which === 'undefined') {
popups.push('prefs');
}
if (which === 'captions' || (typeof which === 'undefined')) {
if (this.captions.length > 0) {
popups.push('captions');
}
}
if (which === 'chapters' || (typeof which === 'undefined')) {
if (this.chapters.length > 0 && this.useChaptersButton) {
popups.push('chapters');
}
}
if (which === 'transcript-window' && this.transcriptType === 'popup') {
popups.push('transcript-window');
}
if (which === 'sign-window' && this.hasSignLanguage) {
popups.push('sign-window');
}
if (popups.length > 0) {
for (i=0; i<popups.length; i++) {
var popup = popups[i];
if (popup == 'prefs') {
this.prefsPopup = this.createPopup('prefs');
} else if (popup == 'captions') {
if (typeof this.captionsPopup === 'undefined' || !this.captionsPopup) {
this.captionsPopup = this.createPopup('captions',this.captions);
}
} else if (popup == 'chapters') {
if (this.selectedChapters) {
tracks = this.selectedChapters.cues;
} else if (this.chapters.length >= 1) {
tracks = this.chapters[0].cues;
} else {
tracks = [];
}
if (typeof this.chaptersPopup === 'undefined' || !this.chaptersPopup) {
this.chaptersPopup = this.createPopup('chapters',tracks);
}
} else if (popup == 'transcript-window') {
return this.createPopup('transcript-window');
} else if (popup == 'sign-window') {
return this.createPopup('sign-window');
}
}
}
};
AblePlayer.prototype.provideFallback = function() {
// provide fallback in case of a critical error building the player
// to test, set data-test-fallback to either of the following values:
// 1 = emulate failure to build Able Player
// 2 = emulate browser that doesn't support HTML5 media
var i, $fallback;
if (this.usingFallback) {
// fallback has already been implemented.
// stopgap to prevent this function from executing twice on the same media element
return;
} else {
this.usingFallback = true;
}
if (!this.testFallback) {
// this is not a test.
// an actual error has resulted in this function being called.
// use scenario 1
this.testFallback = 1;
}
if (typeof this.$media === 'undefined') {
// this function has been called prior to initialize.js > reinitialize()
// before doing anything, need to create the jQuery media object
this.$media = $(this.media);
}
// get/assign an id for the media element
if (this.$media.attr('id')) {
this.mediaId = this.$media.attr('id');
} else {
this.mediaId = 'media' + Math.floor(Math.random() * 1000000000).toString();
}
// check whether element has nested fallback content
this.hasFallback = false;
if (this.$media.children().length) {
i = 0;
while (i < this.$media.children().length && !this.hasFallback) {
if (!(this.$media.children()[i].tagName === 'SOURCE' ||
this.$media.children()[i].tagName === 'TRACK')) {
// this element is something other than <source> or <track>
this.hasFallback = true;
}
i++;
}
}
if (!this.hasFallback) {
// the HTML code does not include any nested fallback content
// inject our own
// NOTE: this message is not translated, since fallback may be needed
// due to an error loading the translation file
// This will only be needed on very rare occasions, so English is ok.
$fallback = $('<p>').text('Media player unavailable.');
this.$media.append($fallback);
}
// get height and width attributes, if present
// and add them to a style attribute
if (this.$media.attr('width')) {
this.$media.css('width',this.$media.attr('width') + 'px');
}
if (this.$media.attr('height')) {
this.$media.css('height',this.$media.attr('height') + 'px');
}
// Remove data-able-player attribute
this.$media.removeAttr('data-able-player');
// Add controls attribute (so browser will add its own controls)
this.$media.prop('controls',true);
if (this.testFallback == 2) {
// emulate browser failure to support HTML5 media by changing the media tag name
// browsers should display the supported content that's nested inside
$(this.$media).replaceWith($('<foobar id="foobar-' + this.mediaId + '">'));
this.$newFallbackElement = $('#foobar-' + this.mediaId);
// append all children from the original media
if (this.$media.children().length) {
i = this.$media.children().length - 1;
while (i >= 0) {
this.$newFallbackElement.prepend($(this.$media.children()[i]));
i--;
}
}
if (!this.hasFallback) {
// inject our own fallback content, defined above
this.$newFallbackElement.append($fallback);
}
} else {
console.warn("Able Player encountered a problem, falling back to browser's HTML5 player.");
}
return;
};
AblePlayer.prototype.calculateControlLayout = function () {
// Calculates the layout for controls based on media and options.
// Returns an array with 4 keys (for legacy skin) or 2 keys (for 2020 skin)
// Keys are the following order:
// 0 = Top left
// 1 = Top right
// 2 = Bottom left (legacy skin only)
// 3 = Bottom right (legacy skin only)
// Each key contains an array of control names to put in that section.
var controlLayout, playbackSupported, numA11yButtons;
controlLayout = [];
controlLayout[0] = [];
controlLayout[1] = [];
if (this.skin === 'legacy') {
controlLayout[2] = [];
controlLayout[3] = [];
}
controlLayout[0].push('play');
controlLayout[0].push('restart');
controlLayout[0].push('rewind');
controlLayout[0].push('forward');
if (this.skin === 'legacy') {
controlLayout[1].push('seek');
}
if (this.hasPlaylist) {
if (this.skin === 'legacy') {
controlLayout[0].push('previous');
controlLayout[0].push('next');
} else {
controlLayout[0].push('previous');
controlLayout[0].push('next');
}
}
if (this.isPlaybackRateSupported()) {
playbackSupported = true;
if (this.skin === 'legacy') {
controlLayout[2].push('slower');
controlLayout[2].push('faster');
}
} else {
playbackSupported = false;
}
numA11yButtons = 0;
if (this.hasCaptions) {
numA11yButtons++;
if (this.skin === 'legacy') {
controlLayout[2].push('captions');
} else {
controlLayout[1].push('captions');
}
}
if (this.hasSignLanguage) {
numA11yButtons++;
if (this.skin === 'legacy') {
controlLayout[2].push('sign');
} else {
controlLayout[1].push('sign');
}
}
if (this.mediaType === 'video') {
if (this.hasOpenDesc || this.hasClosedDesc) {
numA11yButtons++;
if (this.skin === 'legacy') {
controlLayout[2].push('descriptions');
} else {
controlLayout[1].push('descriptions');
}
}
}
if (this.transcriptType !== null && !(this.hideTranscriptButton)) {
numA11yButtons++;
if (this.skin === 'legacy') {
controlLayout[2].push('transcript');
} else {
controlLayout[1].push('transcript');
}
}
if (this.hasChapters && this.useChaptersButton) {
numA11yButtons++;
if (this.skin === 'legacy') {
controlLayout[2].push('chapters');
} else {
controlLayout[1].push('chapters');
}
}
if (this.skin == '2020' && numA11yButtons > 0) {
controlLayout[1].push('pipe');
}
if (playbackSupported && this.skin === '2020') {
controlLayout[1].push('faster');
controlLayout[1].push('slower');
controlLayout[1].push('pipe');
}
if (this.skin === 'legacy') {
controlLayout[3].push('preferences');
} else {
controlLayout[1].push('preferences');
}
if (this.mediaType === 'video' && this.allowFullscreen && this.nativeFullscreenSupported() ) {
if (this.skin === 'legacy') {
controlLayout[3].push('fullscreen');
} else {
controlLayout[1].push('fullscreen');
}
}
if (this.browserSupportsVolume()) {
this.volumeButton = 'volume-' + this.getVolumeName(this.volume);
if (this.skin === 'legacy') {
controlLayout[1].push('volume');
} else {
controlLayout[1].push('volume');
}
} else {
this.volume = false;
}
return controlLayout;
};
AblePlayer.prototype.addControls = function() {
// determine which controls to show based on several factors:
// mediaType (audio vs video)
// availability of tracks (e.g., for closed captions & audio description)
// browser support (e.g., for sliders and speedButtons)
// user preferences (???)
// some controls are aligned on the left, and others on the right
var thisObj, controlLayout, numSections,
i, j, controls, $controllerSpan, $sliderDiv, sliderLabel, $pipe, control,
buttonTitle, $newButton, buttonText, position, buttonHeight,
buttonWidth, buttonSide, controllerWidth, tooltipId, tooltipY, tooltipX,
tooltipWidth, tooltipStyle, tooltip, tooltipTimerId, captionLabel, popupMenuId;
thisObj = this;
// Initialize the layout into the this.controlLayout variable.
controlLayout = this.calculateControlLayout();
numSections = controlLayout.length;
// if addControls() is called after initial build, controls would be duplicated.
// Remove anything from a prior build to prevent duplication.
this.$controllerDiv.find('.able-tooltip, .able-seekbar, .able-control-row, .ableplayer-clear').remove();
// add an empty div to serve as a tooltip
tooltipId = this.mediaId + '-tooltip';
this.$tooltipDiv = $('<div>',{
'id': tooltipId,
'class': 'able-tooltip'
}).hide();
this.$controllerDiv.append(this.$tooltipDiv);
if (this.skin == '2020') {
// add a full-width seek bar
$sliderDiv = $('<div class="able-seekbar"></div>');
sliderLabel = this.translate( 'seekbarLabel', '%1 timeline', [ this.mediaType ] );
this.$controllerDiv.append($sliderDiv);
this.seekBar = new AccessibleSlider($sliderDiv, this.duration, this.seekInterval, sliderLabel );
}
// add a full-width seek bar