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Copy pathcontrol.js
File metadata and controls
2141 lines (1949 loc) · 68.5 KB
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(function ($) {
AblePlayer.prototype.seekTo = function (newTime) {
var thisObj = this;
// define variables to be used for analytics
// e.g., to measure the extent to which users seek back and forward
this.seekFromTime = this.media.currentTime;
this.seekToTime = newTime;
this.seeking = true;
this.liveUpdatePending = true;
if (this.speakingDescription) {
this.synth.cancel();
}
if (this.player === 'html5') {
var seekable;
this.startTime = newTime;
// Check HTML5 media "seekable" property to be sure media is seekable to startTime
seekable = this.media.seekable;
if (seekable.length > 0 && this.startTime >= seekable.start(0) && this.startTime <= seekable.end(0)) {
// ok to seek to startTime
// canplaythrough will be triggered when seeking is complete
// this.seeking will be set to false at that point
this.media.currentTime = this.startTime;
this.seekStatus = 'complete';
if (this.hasSignLanguage && this.signVideo) {
// keep sign languge video in sync
this.signVideo.currentTime = this.startTime;
}
}
}
else if (this.player === 'youtube') {
this.youTubePlayer.seekTo(newTime,true);
if (newTime > 0) {
if (typeof this.$posterImg !== 'undefined') {
this.$posterImg.hide();
}
}
}
else if (this.player === 'vimeo') {
this.vimeoPlayer.setCurrentTime(newTime).then(function() {
// seek finished.
// successful completion also fires a 'seeked' event (see event.js)
thisObj.elapsed = newTime;
thisObj.refreshControls('timeline');
})
}
this.refreshControls('timeline');
};
AblePlayer.prototype.getMediaTimes = function (duration, elapsed) {
// Returns an array with keys 'duration' and 'elapsed'
// Vars passed to this function come courtesy of select Vimeo events
// Use those if they're available.
// Otherwise, will need to call the relevant media API
// This function should only be called from onMediaUpdateTime()
// If duration and elapsed are needed other times, use this.duration and this.elapsed
// both values are expressed in seconds, and all player APIs are similar:
// they return a value that is rounded to the nearest second before playback begins,
// then to the nearest thousandth of a second after playback begins
// With HTML5 media API, some browsers are more precise (e.g., Firefox rounds to 6 decimal points)
// but inconsistent (values with 9 decimal points have been sporadically observed in Safari)
// For standardization, values are rounded to 6 decimal points before they're returned
var deferred, promise, thisObj, mediaTimes;
mediaTimes = {};
deferred = new $.Deferred();
promise = deferred.promise();
thisObj = this;
if (typeof duration !== 'undefined' && typeof elapsed !== 'undefined') {
mediaTimes['duration'] = duration;
mediaTimes['elapsed'] = elapsed;
deferred.resolve(mediaTimes);
}
else {
this.getDuration().then(function(duration) {
mediaTimes['duration'] = thisObj.roundDown(duration,6);
thisObj.getElapsed().then(function(elapsed) {
mediaTimes['elapsed'] = thisObj.roundDown(elapsed,6);
deferred.resolve(mediaTimes);
});
});
}
return promise;
};
AblePlayer.prototype.getDuration = function () {
// returns duration of the current media, expressed in seconds
// function is called by getMediaTimes, and return value is sanitized there
var deferred, promise, thisObj;
deferred = new $.Deferred();
promise = deferred.promise();
thisObj = this;
if (this.player === 'vimeo') {
if (this.vimeoPlayer) {
this.vimeoPlayer.getDuration().then(function(duration) {
if (duration === undefined || isNaN(duration) || duration === -1) {
deferred.resolve(0);
}
else {
deferred.resolve(duration);
}
});
}
else { // vimeoPlayer hasn't been initialized yet.
deferred.resolve(0);
}
}
else {
var duration;
if (this.player === 'html5') {
duration = this.media.duration;
}
else if (this.player === 'youtube') {
if (this.youTubePlayerReady) {
if (this.duration > 0) {
// duration was already retrieved while checking for captions
duration = this.duration;
}
else {
duration = this.youTubePlayer.getDuration();
}
}
else { // the YouTube player hasn't initialized yet
duration = 0;
}
}
if (duration === undefined || isNaN(duration) || duration === -1) {
deferred.resolve(0);
}
else {
deferred.resolve(duration);
}
}
return promise;
};
AblePlayer.prototype.getElapsed = function () {
// returns elapsed time of the current media, expressed in seconds
// function is called by getMediaTimes, and return value is sanitized there
var deferred, promise, thisObj;
deferred = new $.Deferred();
promise = deferred.promise();
thisObj = this;
if (this.player === 'vimeo') {
if (this.vimeoPlayer) {
this.vimeoPlayer.getCurrentTime().then(function(elapsed) {
if (elapsed === undefined || isNaN(elapsed) || elapsed === -1) {
deferred.resolve(0);
}
else {
deferred.resolve(elapsed);
}
});
}
else { // vimeoPlayer hasn't been initialized yet.
deferred.resolve(0);
}
}
else {
var elapsed;
if (this.player === 'html5') {
elapsed = this.media.currentTime;
}
else if (this.player === 'youtube') {
if (this.youTubePlayerReady) {
elapsed = this.youTubePlayer.getCurrentTime();
}
else { // the YouTube player hasn't initialized yet
elapsed = 0;
}
}
if (elapsed === undefined || isNaN(elapsed) || elapsed === -1) {
deferred.resolve(0);
}
else {
deferred.resolve(elapsed);
}
}
return promise;
};
AblePlayer.prototype.getPlayerState = function () {
// Returns one of the following states:
// - 'stopped' - Not yet played for the first time, or otherwise reset to unplayed.
// - 'ended' - Finished playing.
// - 'paused' - Not playing, but not stopped or ended.
// - 'buffering' - Momentarily paused to load, but will resume once data is loaded.
// - 'playing' - Currently playing.
// Commented out the following in 3.2.1 - not sure of its intended purpose
// It can be useful to know player state even when swapping src
// and the overhead is seemingly minimal
// TODO - Investigate this further. Delete if it's not needed
/*
if (this.swappingSrc) {
return;
}
*/
var deferred, promise, thisObj, duration, elapsed;
deferred = new $.Deferred();
promise = deferred.promise();
thisObj = this;
if (this.player === 'html5') {
if (this.media.ended) {
deferred.resolve('ended');
}
else if (this.media.paused) {
deferred.resolve('paused');
}
else if (this.media.readyState !== 4) {
deferred.resolve('buffering');
}
else {
deferred.resolve('playing');
}
}
else if (this.player === 'youtube' && this.youTubePlayerReady) {
var state = this.youTubePlayer.getPlayerState();
if (state === -1 || state === 5) {
deferred.resolve('stopped');
}
else if (state === 0) {
deferred.resolve('ended');
}
else if (state === 1) {
deferred.resolve('playing');
}
else if (state === 2) {
deferred.resolve('paused');
}
else if (state === 3) {
deferred.resolve('buffering');
}
}
else if (this.player === 'vimeo' && this.vimeoPlayer) {
// curiously, Vimeo's API has no getPlaying(), getBuffering(), or getState() methods
// so maybe if it's neither paused nor ended, it must be playing???
this.vimeoPlayer.getPaused().then(function(paused) {
if (paused) {
deferred.resolve('paused');
}
else {
thisObj.vimeoPlayer.getEnded().then(function(ended) {
if (ended) {
deferred.resolve('ended');
}
else {
deferred.resolve('playing');
}
});
}
});
}
return promise;
};
AblePlayer.prototype.isPlaybackRateSupported = function () {
if (this.player === 'html5') {
if (this.media.playbackRate) {
return true;
}
else {
return false;
}
}
else if (this.player === 'youtube') {
// Youtube supports varying playback rates per video.
// Only expose controls if more than one playback rate is available.
if (this.youTubePlayerReady) {
if (this.youTubePlayer.getAvailablePlaybackRates().length > 1) {
return true;
}
else {
return false;
}
}
else {
return false;
}
}
else if (this.player === 'vimeo') {
// since this takes longer to determine, it was set previously in initVimeoPlayer()
return this.vimeoSupportsPlaybackRateChange;
}
};
AblePlayer.prototype.setPlaybackRate = function (rate) {
rate = Math.max(0.5, rate);
if (this.hasClosedDesc && this.descMethod === 'text') {
// keep speech rate in sync with playback rate even if descOn is false
this.syncSpeechToPlaybackRate(rate);
}
if (this.player === 'html5') {
this.media.playbackRate = rate;
}
else if (this.player === 'youtube') {
this.youTubePlayer.setPlaybackRate(rate);
}
else if (this.player === 'vimeo') {
this.vimeoPlayer.setPlaybackRate(rate);
}
if (this.hasSignLanguage && this.signVideo) {
this.signVideo.playbackRate = rate;
}
this.playbackRate = rate;
this.$speed.text(this.tt.speed + ': ' + rate.toFixed(2).toString() + 'x');
};
AblePlayer.prototype.getPlaybackRate = function () {
if (this.player === 'html5') {
return this.media.playbackRate;
}
else if (this.player === 'youtube') {
if (this.youTubePlayerReady) {
return this.youTubePlayer.getPlaybackRate();
}
}
};
AblePlayer.prototype.isPaused = function () {
// Note there are three player states that count as paused in this sense,
// and one of them is named 'paused'.
// A better name would be 'isCurrentlyNotPlayingOrBuffering'
var state;
if (this.player === 'vimeo') {
// just rely on value of this.playing
if (this.playing) {
return false;
}
else {
return true;
}
}
else {
this.getPlayerState().then(function(state) {
// if any of the following is true, consider the media 'paused'
return state === 'paused' || state === 'stopped' || state === 'ended';
});
}
};
AblePlayer.prototype.pauseMedia = function () {
var thisObj = this;
if (this.player === 'html5') {
this.media.pause(true);
if (this.hasSignLanguage && this.signVideo) {
this.signVideo.pause(true);
}
}
else if (this.player === 'youtube') {
this.youTubePlayer.pauseVideo();
}
else if (this.player === 'vimeo') {
this.vimeoPlayer.pause();
}
};
AblePlayer.prototype.playMedia = function () {
var thisObj = this;
if (this.player === 'html5') {
this.media.play(true);
if (this.hasSignLanguage && this.signVideo) {
this.signVideo.play(true);
}
}
else if (this.player === 'youtube') {
this.youTubePlayer.playVideo();
if (typeof this.$posterImg !== 'undefined') {
this.$posterImg.hide();
}
this.stoppingYouTube = false;
}
else if (this.player === 'vimeo') {
this.vimeoPlayer.play();
}
this.startedPlaying = true;
if (this.hideControls) {
// wait briefly after playback begins, then hide controls
this.hidingControls = true;
this.invokeHideControlsTimeout();
}
};
AblePlayer.prototype.fadeControls = function(direction) {
// Visibly fade controls without hiding them from screen reader users
// direction is either 'out' or 'in'
// TODO: This still needs work.
// After the player fades, it's replaced by an empty space
// Would be better if the video and captions expanded to fill the void
// Attempted to fade out to 0 opacity, then move the playerDiv offscreen
// and expand the mediaContainer to fill the vacated space
// However, my attempts to do this have been choppy and buggy
// Code is preserved below and commented out
var thisObj, mediaHeight, playerHeight, newMediaHeight;
var thisObj = this;
if (direction == 'out') {
// get the original height of two key components:
mediaHeight = this.$mediaContainer.height();
playerHeight = this.$playerDiv.height();
newMediaHeight = mediaHeight + playerHeight;
// fade slowly to transparency
this.$playerDiv.fadeTo(2000,0,function() {
/*
// when finished, position playerDiv offscreen
// thisObj.$playerDiv.addClass('able-offscreen');
// Expand the height of mediaContainer to fill the void (needs work)
thisObj.$mediaContainer.animate({
height: newMediaHeight
},500);
*/
});
}
else if (direction == 'in') {
// restore captionsContainer to its original height (needs work)
// this.$mediaContainer.removeAttr('style');
// fade relatively quickly back to its original position with full opacity
// this.$playerDiv.removeClass('able-offscreen').fadeTo(100,1);
this.$playerDiv.fadeTo(100,1);
}
};
AblePlayer.prototype.invokeHideControlsTimeout = function () {
// invoke timeout for waiting a few seconds after a mouse move or key down
// before hiding controls again
var thisObj = this;
this.hideControlsTimeout = window.setTimeout(function() {
if (typeof thisObj.playing !== 'undefined' && thisObj.playing === true && thisObj.hideControls) {
thisObj.fadeControls('out');
thisObj.controlsHidden = true;
}
},5000);
this.hideControlsTimeoutStatus = 'active';
};
AblePlayer.prototype.refreshControls = function(context, duration, elapsed) {
// context is one of the following:
// 'init' - initial build (or subsequent change that requires full rebuild)
// 'timeline' - a change may effect time-related controls
// 'captions' - a change may effect caption-related controls
// 'descriptions' - a change may effect description-related controls
// 'transcript' - a change may effect the transcript window or button
// 'fullscreen' - a change has been triggered by full screen toggle
// 'playpause' - a change triggered by either a 'play' or 'pause' event
// NOTE: context is not currently supported.
// The steps in this function have too many complex interdependencies
// The gains in efficiency are offset by the possibility of introducing bugs
// For now, executing everything
context = 'init';
// duration and elapsed are passed from callback functions of Vimeo API events
// duration is expressed as sss.xxx
// elapsed is expressed as sss.xxx
var thisObj, duration, elapsed, lastChapterIndex, displayElapsed,
updateLive, textByState, timestamp, widthUsed,
leftControls, rightControls, seekbarWidth, seekbarSpacer, captionsCount,
buffered, newTop, statusBarHeight, speedHeight, statusBarWidthBreakpoint,
newSvgData;
thisObj = this;
if (this.swappingSrc) {
if (this.playing) {
// wait until new source has loaded before refreshing controls
// can't wait if player is NOT playing because some critical events
// won't fire until playback of new media starts
return;
}
}
if (context === 'timeline' || context === 'init') {
// all timeline-related functionality requires both duration and elapsed
if (typeof this.duration === 'undefined') {
// wait until duration is known before proceeding with refresh
return;
}
if (this.useChapterTimes) {
this.chapterDuration = this.getChapterDuration();
this.chapterElapsed = this.getChapterElapsed();
}
if (this.useFixedSeekInterval === false && this.seekIntervalCalculated === false && this.duration > 0) {
// couldn't calculate seekInterval previously; try again.
this.setSeekInterval();
}
if (this.seekBar) {
if (this.useChapterTimes) {
lastChapterIndex = this.selectedChapters.cues.length-1;
if (this.selectedChapters.cues[lastChapterIndex] == this.currentChapter) {
// this is the last chapter
if (this.currentChapter.end !== this.duration) {
// chapter ends before or after video ends
// need to adjust seekbar duration to match video end
this.seekBar.setDuration(this.duration - this.currentChapter.start);
}
else {
this.seekBar.setDuration(this.chapterDuration);
}
}
else {
// this is not the last chapter
this.seekBar.setDuration(this.chapterDuration);
}
}
else {
if (!(this.duration === undefined || isNaN(this.duration) || this.duration === -1)) {
this.seekBar.setDuration(this.duration);
}
}
if (!(this.seekBar.tracking)) {
// Only update the aria live region if we have an update pending
// (from a seek button control) or if the seekBar has focus.
// We use document.activeElement instead of $(':focus') due to a strange bug:
// When the seekHead element is focused, .is(':focus') is failing and $(':focus') is returning an undefined element.
updateLive = this.liveUpdatePending || this.seekBar.seekHead.is($(document.activeElement));
this.liveUpdatePending = false;
if (this.useChapterTimes) {
this.seekBar.setPosition(this.chapterElapsed, updateLive);
}
else {
this.seekBar.setPosition(this.elapsed, updateLive);
}
}
// When seeking, display the seek bar time instead of the actual elapsed time.
if (this.seekBar.tracking) {
displayElapsed = this.seekBar.lastTrackPosition;
}
else {
if (this.useChapterTimes) {
displayElapsed = this.chapterElapsed;
}
else {
displayElapsed = this.elapsed;
}
}
}
// update elapsed & duration
if (typeof this.$durationContainer !== 'undefined') {
if (this.useChapterTimes) {
this.$durationContainer.text(' / ' + this.formatSecondsAsColonTime(this.chapterDuration));
}
else {
this.$durationContainer.text(' / ' + this.formatSecondsAsColonTime(this.duration));
}
}
if (typeof this.$elapsedTimeContainer !== 'undefined') {
this.$elapsedTimeContainer.text(this.formatSecondsAsColonTime(displayElapsed));
}
if (this.skin === 'legacy') {
// Update seekbar width.
// To do this, we need to calculate the width of all buttons surrounding it.
if (this.seekBar) {
widthUsed = 0;
leftControls = this.seekBar.wrapperDiv.parent().prev('div.able-left-controls');
rightControls = leftControls.next('div.able-right-controls');
leftControls.children().each(function () {
if ($(this).attr('role')=='button') {
widthUsed += $(this).outerWidth(true); // true = include margin
}
});
rightControls.children().each(function () {
if ($(this).attr('role')=='button') {
widthUsed += $(this).outerWidth(true);
}
});
if (this.fullscreen) {
seekbarWidth = $(window).width() - widthUsed;
}
else {
// seekbar is wide enough to fill the remaining space
// include a 5px buffer to account for minor browser differences
seekbarWidth = this.$ableWrapper.width() - widthUsed - 5;
}
// Sometimes some minor fluctuations based on browser weirdness, so set a threshold.
if (Math.abs(seekbarWidth - this.seekBar.getWidth()) > 5) {
this.seekBar.setWidth(seekbarWidth);
}
}
}
// Update buffering progress.
// TODO: Currently only using the first HTML5 buffered interval,
// but this fails sometimes when buffering is split into two or more intervals.
if (this.player === 'html5') {
if (this.media.buffered.length > 0) {
buffered = this.media.buffered.end(0);
if (this.useChapterTimes) {
if (buffered > this.chapterDuration) {
buffered = this.chapterDuration;
}
if (this.seekBar) {
this.seekBar.setBuffered(buffered / this.chapterDuration);
}
}
else {
if (this.seekBar) {
if (!isNaN(buffered)) {
this.seekBar.setBuffered(buffered / duration);
}
}
}
}
}
else if (this.player === 'youtube') {
if (this.seekBar) {
if (this.youTubePlayerReady) {
this.seekBar.setBuffered(this.youTubePlayer.getVideoLoadedFraction());
}
}
}
else if (this.player === 'vimeo') {
// TODO: Add support for Vimeo buffering update
}
} // end if context == 'timeline' or 'init'
if (context === 'descriptions' || context == 'init'){
if (this.$descButton) {
if (this.descOn) {
this.$descButton.removeClass('buttonOff').attr('aria-label',this.tt.turnOffDescriptions);
this.$descButton.find('span.able-clipped').text(this.tt.turnOffDescriptions);
}
else {
this.$descButton.addClass('buttonOff').attr('aria-label',this.tt.turnOnDescriptions);
this.$descButton.find('span.able-clipped').text(this.tt.turnOnDescriptions);
}
}
}
if (context === 'captions' || context == 'init'){
if (this.$ccButton) {
captionsCount = this.captions.length;
// Button has a different title depending on the number of captions.
// If only one caption track, this is "Show captions" and "Hide captions"
// Otherwise, it is just always "Captions"
if (!this.captionsOn) {
this.$ccButton.addClass('buttonOff');
this.$ccButton.attr('aria-pressed', 'false')
if (captionsCount === 1) {
this.$ccButton.attr('aria-label',this.tt.showCaptions);
this.$ccButton.find('span.able-clipped').text(this.tt.showCaptions);
}
}
else {
this.$ccButton.removeClass('buttonOff');
this.$ccButton.attr('aria-pressed', 'true')
if (captionsCount === 1) {
this.$ccButton.attr('aria-label',this.tt.hideCaptions);
this.$ccButton.find('span.able-clipped').text(this.tt.hideCaptions);
}
}
if (captionsCount > 1) {
this.$ccButton.attr({
'aria-label': this.tt.captions,
'aria-haspopup': 'true',
'aria-controls': this.mediaId + '-captions-menu'
});
this.$ccButton.find('span.able-clipped').text(this.tt.captions);
}
}
}
if (context === 'fullscreen' || context == 'init'){
if (this.$fullscreenButton) {
if (!this.fullscreen) {
this.$fullscreenButton.attr('aria-label', this.tt.enterFullscreen);
if (this.iconType === 'font') {
this.$fullscreenButton.find('span').first().removeClass('icon-fullscreen-collapse').addClass('icon-fullscreen-expand');
this.$fullscreenButton.find('span.able-clipped').text(this.tt.enterFullscreen);
}
else if (this.iconType === 'svg') {
newSvgData = this.getSvgData('fullscreen-expand');
this.$fullscreenButton.find('svg').attr('viewBox',newSvgData[0]);
this.$fullscreenButton.find('path').attr('d',newSvgData[1]);
this.$fullscreenButton.find('span.able-clipped').text(this.tt.enterFullscreen);
}
else {
this.$fullscreenButton.find('img').attr('src',this.fullscreenExpandButtonImg);
}
}
else {
this.$fullscreenButton.attr('aria-label',this.tt.exitFullscreen);
if (this.iconType === 'font') {
this.$fullscreenButton.find('span').first().removeClass('icon-fullscreen-expand').addClass('icon-fullscreen-collapse');
this.$fullscreenButton.find('span.able-clipped').text(this.tt.exitFullscreen);
}
else if (this.iconType === 'svg') {
newSvgData = this.getSvgData('fullscreen-collapse');
this.$fullscreenButton.find('svg').attr('viewBox',newSvgData[0]);
this.$fullscreenButton.find('path').attr('d',newSvgData[1]);
this.$fullscreenButton.find('span.able-clipped').text(this.tt.exitFullscreen);
}
else {
this.$fullscreenButton.find('img').attr('src',this.fullscreenCollapseButtonImg);
}
}
}
}
if (context === 'playpause' || context == 'init'){
if (typeof this.$bigPlayButton !== 'undefined' && typeof this.seekBar !== 'undefined') {
// Choose show/hide for big play button and adjust position.
if (this.paused && !this.seekBar.tracking) {
if (!this.hideBigPlayButton) {
this.$bigPlayButton.show();
this.$bigPlayButton.attr('aria-hidden', 'false');
}
if (this.fullscreen) {
this.$bigPlayButton.width($(window).width());
this.$bigPlayButton.height($(window).height());
}
else {
this.$bigPlayButton.width(this.$mediaContainer.width());
this.$bigPlayButton.height(this.$mediaContainer.height());
}
}
else {
this.$bigPlayButton.hide();
this.$bigPlayButton.attr('aria-hidden', 'true');
}
}
}
if (context === 'transcript' || context == 'init'){
if (this.transcriptType) {
// Sync checkbox and autoScrollTranscript with user preference
if (this.prefAutoScrollTranscript === 1) {
this.autoScrollTranscript = true;
this.$autoScrollTranscriptCheckbox.prop('checked',true);
}
else {
this.autoScrollTranscript = false;
this.$autoScrollTranscriptCheckbox.prop('checked',false);
}
// If transcript locked, scroll transcript to current highlight location.
if (this.autoScrollTranscript && this.currentHighlight) {
newTop = Math.floor(this.$transcriptDiv.scrollTop() +
$(this.currentHighlight).position().top -
(this.$transcriptDiv.height() / 2) +
($(this.currentHighlight).height() / 2));
if (newTop !== Math.floor(this.$transcriptDiv.scrollTop())) {
// Set a flag to ignore the coming scroll event.
// there's no other way I know of to differentiate programmatic and user-initiated scroll events.
this.scrollingTranscript = true;
// only scroll once after moving a highlight
if (this.movingHighlight) {
this.$transcriptDiv.scrollTop(newTop);
this.movingHighlight = false;
}
}
}
}
}
if (context === 'init') {
if (this.$chaptersButton) {
this.$chaptersButton.attr({
'aria-label': this.tt.chapters,
'aria-haspopup': 'true',
'aria-controls': this.mediaId + '-chapters-menu'
});
}
}
if (context === 'timeline' || context === 'playpause' || context === 'init') {
// update status
textByState = {
'stopped': this.tt.statusStopped,
'paused': this.tt.statusPaused,
'playing': this.tt.statusPlaying,
'buffering': this.tt.statusBuffering,
'ended': this.tt.statusEnd
};
if (this.stoppingYouTube) {
// stoppingYouTube is true temporarily while video is paused and seeking to 0
// See notes in handleRestart()
// this.stoppingYouTube will be reset when seek to 0 is finished (in event.js > onMediaUpdateTime())
if (this.$status.text() !== this.tt.statusStopped) {
this.$status.text(this.tt.statusStopped);
}
if (this.$playpauseButton.find('span').first().hasClass('icon-pause')) {
if (this.iconType === 'font') {
this.$playpauseButton.find('span').first().removeClass('icon-pause').addClass('icon-play');
this.$playpauseButton.find('span.able-clipped').text(this.tt.play);
}
else if (this.iconType === 'svg') {
newSvgData = this.getSvgData('play');
this.$playpauseButton.find('svg').attr('viewBox',newSvgData[0]);
this.$playpauseButton.find('path').attr('d',newSvgData[1]);
this.$playpauseButton.find('span.able-clipped').text(this.tt.play);
}
else {
this.$playpauseButton.find('img').attr('src',this.playButtonImg);
}
}
}
else {
if (typeof this.$status !== 'undefined' && typeof this.seekBar !== 'undefined') {
// Update the text only if it's changed since it has role="alert";
// also don't update while tracking, since this may Pause/Play the player but we don't want to send a Pause/Play update.
this.getPlayerState().then(function(currentState) {
if (thisObj.$status.text() !== textByState[currentState] && !thisObj.seekBar.tracking) {
// Debounce updates; only update after status has stayed steadily different for a while
// "A while" is defined differently depending on context
if (thisObj.swappingSrc) {
// this is where most of the chatter occurs (e.g., playing, paused, buffering, playing),
// so set a longer wait time before writing a status message
if (!thisObj.debouncingStatus) {
thisObj.statusMessageThreshold = 2000; // in ms (2 seconds)
}
}
else {
// for all other contexts (e.g., users clicks Play/Pause)
// user should receive more rapid feedback
if (!thisObj.debouncingStatus) {
thisObj.statusMessageThreshold = 250; // in ms
}
}
timestamp = (new Date()).getTime();
if (!thisObj.statusDebounceStart) {
thisObj.statusDebounceStart = timestamp;
// Call refreshControls() again after allotted time has passed
thisObj.debouncingStatus = true;
thisObj.statusTimeout = setTimeout(function () {
thisObj.debouncingStatus = false;
thisObj.refreshControls(context);
}, thisObj.statusMessageThreshold);
}
else if ((timestamp - thisObj.statusDebounceStart) > thisObj.statusMessageThreshold) {
thisObj.$status.text(textByState[currentState]);
thisObj.statusDebounceStart = null;
clearTimeout(thisObj.statusTimeout);
thisObj.statusTimeout = null;
}
}
else {
thisObj.statusDebounceStart = null;
thisObj.debouncingStatus = false;
clearTimeout(thisObj.statusTimeout);
thisObj.statusTimeout = null;
}
// Don't change play/pause button display while using the seek bar (or if YouTube stopped)
if (!thisObj.seekBar.tracking && !thisObj.stoppingYouTube) {
if (currentState === 'paused' || currentState === 'stopped' || currentState === 'ended') {
thisObj.$playpauseButton.attr('aria-label',thisObj.tt.play);
if (thisObj.iconType === 'font') {
thisObj.$playpauseButton.find('span').first().removeClass('icon-pause').addClass('icon-play');
thisObj.$playpauseButton.find('span.able-clipped').text(thisObj.tt.play);
}
else if (thisObj.iconType === 'svg') {
newSvgData = thisObj.getSvgData('play');
thisObj.$playpauseButton.find('svg').attr('viewBox',newSvgData[0]);
thisObj.$playpauseButton.find('path').attr('d',newSvgData[1]);
thisObj.$playpauseButton.find('span.able-clipped').text(thisObj.tt.play);
}
else {
thisObj.$playpauseButton.find('img').attr('src',thisObj.playButtonImg);
}
}
else {
thisObj.$playpauseButton.attr('aria-label',thisObj.tt.pause);
if (thisObj.iconType === 'font') {
thisObj.$playpauseButton.find('span').first().removeClass('icon-play').addClass('icon-pause');
thisObj.$playpauseButton.find('span.able-clipped').text(thisObj.tt.pause);
}
else if (thisObj.iconType === 'svg') {
newSvgData = thisObj.getSvgData('pause');
thisObj.$playpauseButton.find('svg').attr('viewBox',newSvgData[0]);
thisObj.$playpauseButton.find('path').attr('d',newSvgData[1]);
thisObj.$playpauseButton.find('span.able-clipped').text(thisObj.tt.pause);
}
else {
thisObj.$playpauseButton.find('img').attr('src',thisObj.pauseButtonImg);
}
}
}
});
}
}
}
// Show/hide status bar content conditionally
if (!this.fullscreen) {
statusBarWidthBreakpoint = 300;
statusBarHeight = this.$statusBarDiv.height();
speedHeight = this.$statusBarDiv.find('span.able-speed').height();
if (speedHeight > (statusBarHeight + 5)) {
// speed bar is wrapping (happens often in German player)
this.$statusBarDiv.find('span.able-speed').hide();
this.hidingSpeed = true;
}
else {
if (this.hidingSpeed) {
this.$statusBarDiv.find('span.able-speed').show();
this.hidingSpeed = false;
}
if (this.$statusBarDiv.width() < statusBarWidthBreakpoint) {
// Player is too small for a speed span
this.$statusBarDiv.find('span.able-speed').hide();
this.hidingSpeed = true;
}
else {
if (this.hidingSpeed) {
this.$statusBarDiv.find('span.able-speed').show();
this.hidingSpeed = false;
}
}
}
}
};
AblePlayer.prototype.getHiddenWidth = function($el) {
// jQuery returns for width() if element is hidden
// this function is a workaround
// save a reference to a cloned element that can be measured
var $hiddenElement = $el.clone().appendTo('body');
// calculate the width of the clone
var width = $hiddenElement.outerWidth();
// remove the clone from the DOM
$hiddenElement.remove();
return width;
};
AblePlayer.prototype.handlePlay = function(e) {
if (this.paused) {
// user clicked play
this.okToPlay = true;
this.playMedia();
if (this.synth.paused) {
// media was paused while description was speaking
// resume utterance
this.synth.resume();
}
}
else {
// user clicked pause
this.okToPlay = false;
this.pauseMedia();
if (this.speakingDescription) {
// pause the current utterance