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preference.js
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1170 lines (1099 loc) · 36.2 KB
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(function ($) {
AblePlayer.prototype.setCookie = function(cookieValue) {
Cookies.set('Able-Player', JSON.stringify(cookieValue), {
expires: 90,
sameSite: 'strict'
});
};
AblePlayer.prototype.getCookie = function() {
var defaultCookie = {
preferences: {},
sign: {},
transcript: {},
voices: []
};
var cookie;
try {
cookie = JSON.parse(Cookies.get('Able-Player'));
}
catch (err) {
// Original cookie can't be parsed; update to default
this.setCookie(defaultCookie);
cookie = defaultCookie;
}
if (cookie) {
return cookie;
}
else {
return defaultCookie;
}
};
AblePlayer.prototype.updateCookie = function( setting ) {
// called when a particular setting had been updated
// useful for settings updated indepedently of Preferences dialog
// e.g., prefAutoScrollTranscript, which is updated in control.js > handleTranscriptLockToggle()
// setting is any supported preference name (e.g., "prefCaptions")
// OR 'transcript' or 'sign' (not user-defined preferences, used to save position of draggable windows)
var cookie, $window, windowPos, available, i, prefName, voiceLangFound, newVoice;
cookie = this.getCookie();
if (setting === 'transcript' || setting === 'sign') {
if (setting === 'transcript') {
$window = this.$transcriptArea;
windowPos = $window.position();
if (typeof cookie.transcript === 'undefined') {
cookie.transcript = {};
}
cookie.transcript['position'] = $window.css('position'); // either 'relative' or 'absolute'
cookie.transcript['zindex'] = $window.css('z-index');
cookie.transcript['top'] = windowPos.top;
cookie.transcript['left'] = windowPos.left;
cookie.transcript['width'] = $window.width();
cookie.transcript['height'] = $window.height();
}
else if (setting === 'sign') {
$window = this.$signWindow;
windowPos = $window.position();
if (typeof cookie.sign === 'undefined') {
cookie.sign = {};
}
cookie.sign['position'] = $window.css('position'); // either 'relative' or 'absolute'
cookie.sign['zindex'] = $window.css('z-index');
cookie.sign['top'] = windowPos.top;
cookie.sign['left'] = windowPos.left;
cookie.sign['width'] = $window.width();
cookie.sign['height'] = $window.height();
}
}
else if (setting === 'voice') {
if (typeof cookie.voices === 'undefined') {
cookie.voices = [];
}
// replace preferred voice for this lang in cookie.voices array, if one exists
// otherwise, add it to the array
voiceLangFound = false;
for (var v=0; v < cookie.voices.length; v++) {
if (cookie.voices[v].lang === this.prefDescVoiceLang) {
voiceLangFound = true;
cookie.voices[v].name = this.prefDescVoice;
}
}
if (!voiceLangFound) {
// no voice has been saved yet for this language. Add it to array.
newVoice = {'name':this.prefDescVoice, 'lang':this.prefDescVoiceLang};
cookie.voices.push(newVoice);
}
}
else {
available = this.getAvailablePreferences();
// Rebuild cookie with current cookie values,
// replacing the one value that's been changed
for (i = 0; i < available.length; i++) {
prefName = available[i]['name'];
if (prefName == setting) {
// this is the one that requires an update
cookie.preferences[prefName] = this[prefName];
}
}
}
// Save updated cookie
this.setCookie(cookie);
};
AblePlayer.prototype.getPreferencesGroups = function() {
// return array of groups in the order in which they will appear
// in the Preferences popup menu
// Human-readable label for each group is defined in translation table
if (this.usingYouTubeCaptions) {
// no transcript is possible
return ['captions','descriptions','keyboard'];
}
else if (this.usingVimeoCaptions) {
// users cannot control caption appearance
// and no transcript is possible
return ['descriptions','keyboard'];
}
else {
return ['captions','descriptions','keyboard','transcript'];
}
}
AblePlayer.prototype.getAvailablePreferences = function() {
// Return the list of currently available preferences.
// Preferences with no 'label' are set within player, not shown in Prefs dialog
var prefs = [];
// Modifier keys preferences
prefs.push({
'name': 'prefAltKey', // use alt key with shortcuts
'label': this.tt.prefAltKey,
'group': 'keyboard',
'default': 1
});
prefs.push({
'name': 'prefCtrlKey', // use ctrl key with shortcuts
'label': this.tt.prefCtrlKey,
'group': 'keyboard',
'default': 1
});
prefs.push({
'name': 'prefShiftKey',
'label': this.tt.prefShiftKey,
'group': 'keyboard',
'default': 0
});
// Transcript preferences
prefs.push({
'name': 'prefTranscript', // transcript default state
'label': null,
'group': 'transcript',
'default': 0 // off because turning it on has a certain WOW factor
});
prefs.push({
'name': 'prefHighlight', // highlight transcript as media plays
'label': this.tt.prefHighlight,
'group': 'transcript',
'default': 1 // on because many users can benefit
});
prefs.push({
'name': 'prefAutoScrollTranscript',
'label': null,
'group': 'transcript',
'default': 1
});
prefs.push({
'name': 'prefTabbable', // tab-enable transcript
'label': this.tt.prefTabbable,
'group': 'transcript',
'default': 0 // off because if users don't need it, it impedes tabbing elsewhere on the page
});
// Caption preferences
prefs.push({
'name': 'prefCaptions', // closed captions default state
'label': null,
'group': 'captions',
'default': this.defaultStateCaptions
});
if (!this.usingYouTubeCaptions) {
/* // not supported yet
prefs.push({
'name': 'prefCaptionsStyle',
'label': this.tt.prefCaptionsStyle,
'group': 'captions',
'default': this.tt.captionsStylePopOn
});
*/
// captions are always positioned above the player for audio
if (this.mediaType === 'video') {
prefs.push({
'name': 'prefCaptionsPosition',
'label': this.tt.prefCaptionsPosition,
'group': 'captions',
'default': this.defaultCaptionsPosition
});
}
prefs.push({
'name': 'prefCaptionsFont',
'label': this.tt.prefCaptionsFont,
'group': 'captions',
'default': 'sans-serif'
});
}
// This is the one option that is supported by YouTube IFrame API
prefs.push({
'name': 'prefCaptionsSize',
'label': this.tt.prefCaptionsSize,
'group': 'captions',
'default': '100%'
});
if (!this.usingYouTubeCaptions) {
prefs.push({
'name': 'prefCaptionsColor',
'label': this.tt.prefCaptionsColor,
'group': 'captions',
'default': 'white'
});
prefs.push({
'name': 'prefCaptionsBGColor',
'label': this.tt.prefCaptionsBGColor,
'group': 'captions',
'default': 'black'
});
prefs.push({
'name': 'prefCaptionsOpacity',
'label': this.tt.prefCaptionsOpacity,
'group': 'captions',
'default': '100%'
});
}
if (this.mediaType === 'video') {
// Description preferences
prefs.push({
'name': 'prefDesc', // audio description default state
'label': null,
'group': 'descriptions',
'default': this.defaultStateDescriptions
});
prefs.push({
'name': 'prefDescMethod', // audio description default format (if both 'video' and 'text' are available)
'label': null,
'group': 'descriptions',
'default': 'video' // video (an alternative described version) always wins
});
prefs.push({
'name': 'prefDescVoice',
'label': this.tt.prefDescVoice,
'group': 'descriptions',
'default': null // will be set later, in injectPrefsForm()
});
prefs.push({
'name': 'prefDescPitch',
'label': this.tt.prefDescPitch,
'group': 'descriptions',
'default': 1 // 0 to 2
});
prefs.push({
'name': 'prefDescRate',
'label': this.tt.prefDescRate,
'group': 'descriptions',
'default': 1 // 0.1 to 10 (1 is normal speech; 2 is fast but decipherable; >2 is super fast)
});
prefs.push({
'name': 'prefDescVolume',
'label': this.tt.volume,
'group': 'descriptions',
'default': 1 // 0 to 1
});
prefs.push({
'name': 'prefDescPause', // automatically pause when closed description starts
'label': this.tt.prefDescPause,
'group': 'descriptions',
'default': this.defaultDescPause
});
prefs.push({
'name': 'prefDescVisible', // visibly show closed description (if avilable and used)
'label': this.tt.prefDescVisible,
'group': 'descriptions',
'default': 0 // off as of 4.3.16, to avoid overloading the player with visible features
});
}
// Preferences without a category (not shown in Preferences dialogs)
prefs.push({
'name': 'prefSign', // open sign language window by default if avilable
'label': null,
'group': null,
'default': 0 // off because clicking an icon to see the sign window has a powerful impact
});
return prefs;
};
AblePlayer.prototype.loadCurrentPreferences = function () {
// Load current/default preferences from cookie into the AblePlayer object.
var available = this.getAvailablePreferences();
var cookie = this.getCookie();
// Copy current cookie values into this object, and fill in any default values.
for (var ii = 0; ii < available.length; ii++) {
var prefName = available[ii]['name'];
var defaultValue = available[ii]['default'];
if (cookie.preferences[prefName] !== undefined) {
this[prefName] = cookie.preferences[prefName];
}
else {
cookie.preferences[prefName] = defaultValue;
this[prefName] = defaultValue;
}
}
// Also load array of preferred voices from cookie
if (typeof cookie.voices !== 'undefined') {
this.prefVoices = cookie.voices;
}
this.setCookie(cookie);
};
AblePlayer.prototype.injectPrefsForm = function (form) {
// Creates a preferences form and injects it.
// form is one of the supported forms (groups) defined in getPreferencesGroups()
var thisObj, available, descLangs,
$prefsDiv, formTitle, introText,
$prefsIntro,$prefsIntroP2,p3Text,$prefsIntroP3,i, j,
$fieldset, fieldsetClass, fieldsetId,
$descFieldset, $descLegend, $legend, legendId,
thisPref, $thisDiv, thisClass, thisId, $thisLabel, $thisField,
$div1,id1,$radio1,$label1,
$div2,id2,$radio2,$label2,
options,$thisOption,optionValue,optionLang,optionText,sampleCapsDiv,
changedPref,changedSpan,changedText,
currentDescState, prefDescVoice,
$kbHeading,$kbList,kbLabels,keys,kbListText,$kbListItem,
dialog,saveButton,cancelButton;
thisObj = this;
available = this.getAvailablePreferences();
// outer container, will be assigned role="dialog"
$prefsDiv = $('<div>',{
'class': 'able-prefs-form '
});
var customClass = 'able-prefs-form-' + form;
$prefsDiv.addClass(customClass);
// add titles and intros
if (form == 'captions') {
formTitle = this.tt.prefTitleCaptions;
// Intro text removed in 4.4.32 to cut down on unnecessary verbiage
}
else if (form == 'descriptions') {
formTitle = this.tt.prefTitleDescriptions;
var $prefsIntro = $('<p>',{
text: this.tt.prefIntroDescription1
});
var $prefsIntroUL = $('<ul>');
var $prefsIntroLI1 = $('<li>',{
text: this.tt.prefDescFormatOption1
});
var $prefsIntroLI2 = $('<li>',{
text: this.tt.prefDescFormatOption2
});
$prefsIntroUL.append($prefsIntroLI1,$prefsIntroLI2);
if (this.hasOpenDesc && this.hasClosedDesc) {
currentDescState = this.tt.prefIntroDescription2 + ' ';
currentDescState += '<strong>' + this.tt.prefDescFormatOption1b + '</strong>';
currentDescState += ' <em>' + this.tt.and + '</em> <strong>' + this.tt.prefDescFormatOption2b + '</strong>.';
}
else if (this.hasOpenDesc) {
currentDescState = this.tt.prefIntroDescription2;
currentDescState += ' <strong>' + this.tt.prefDescFormatOption1b + '</strong>.';
}
else if (this.hasClosedDesc) {
currentDescState = this.tt.prefIntroDescription2;
currentDescState += ' <strong>' + this.tt.prefDescFormatOption2b + '</strong>.';
}
else {
currentDescState = this.tt.prefIntroDescriptionNone;
}
$prefsIntroP2 = $('<p>',{
html: currentDescState
});
p3Text = this.tt.prefIntroDescription3;
if (this.hasOpenDesc || this.hasClosedDesc) {
p3Text += ' ' + this.tt.prefIntroDescription4;
}
$prefsIntroP3 = $('<p>',{
text: p3Text
});
$prefsDiv.append($prefsIntro,$prefsIntroUL,$prefsIntroP2,$prefsIntroP3);
}
else if (form == 'keyboard') {
formTitle = this.tt.prefTitleKeyboard;
introText = this.tt.prefIntroKeyboard1;
introText += ' ' + this.tt.prefIntroKeyboard2;
introText += ' ' + this.tt.prefIntroKeyboard3;
$prefsIntro = $('<p>',{
text: introText
});
$prefsDiv.append($prefsIntro);
}
else if (form == 'transcript') {
formTitle = this.tt.prefTitleTranscript;
// Intro text removed in 4.4.32 to cut down on unnecessary verbiage
}
$fieldset = $('<div>').attr('role','group');
fieldsetClass = 'able-prefs-' + form;
fieldsetId = this.mediaId + '-prefs-' + form;
legendId = fieldsetId + '-legend';
$fieldset.addClass(fieldsetClass).attr('id',fieldsetId);
if (form === 'keyboard') {
$legend = $('<h2>' + this.tt.prefHeadingKeyboard1 + '</h2>');
$legend.attr('id',legendId);
$fieldset.attr('aria-labelledby',legendId);
$fieldset.append($legend);
}
else if (form === 'descriptions') {
$legend = $('<h2>' + this.tt.prefHeadingTextDescription + '</h2>');
$legend.attr('id',legendId);
$fieldset.attr('aria-labelledby',legendId);
$fieldset.append($legend);
}
for (i=0; i<available.length; i++) {
// only include prefs on the current form if they have a label
if ((available[i]['group'] == form) && available[i]['label']) {
thisPref = available[i]['name'];
thisClass = 'able-' + thisPref;
thisId = this.mediaId + '_' + thisPref;
$thisDiv = $('<div>').addClass(thisClass);
if (form === 'captions') {
$thisLabel = $('<label for="' + thisId + '"> ' + available[i]['label'] + '</label>');
$thisField = $('<select>',{
name: thisPref,
id: thisId,
});
if (thisPref !== 'prefCaptions' && thisPref !== 'prefCaptionsStyle') {
// add a change handler that updates the style of the sample caption text
$thisField.on( 'change', function() {
changedPref = $(this).attr('name');
thisObj.stylizeCaptions(thisObj.$sampleCapsDiv,changedPref);
});
}
options = this.getCaptionsOptions(thisPref);
for (j=0; j < options.length; j++) {
if (thisPref === 'prefCaptionsPosition') {
optionValue = options[j];
if (optionValue === 'overlay') {
optionText = this.tt.captionsPositionOverlay;
}
else if (optionValue === 'below') {
optionValue = options[j];
optionText = this.tt.captionsPositionBelow;
}
}
else if (thisPref === 'prefCaptionsFont' || thisPref === 'prefCaptionsColor' || thisPref === 'prefCaptionsBGColor') {
optionValue = options[j][0];
optionText = options[j][1];
}
else if (thisPref === 'prefCaptionsOpacity') {
optionValue = options[j];
optionText = options[j];
if (optionValue === '0%') {
optionText += ' (' + this.tt.transparent + ')';
}
else if (optionValue === '100%') {
optionText += ' (' + this.tt.solid + ')';
}
}
else {
optionValue = options[j];
optionText = options[j];
}
$thisOption = $('<option>',{
value: optionValue,
text: optionText
});
if (this[thisPref] === optionValue) {
$thisOption.prop('selected',true);
}
$thisField.append($thisOption);
}
$thisDiv.append($thisLabel,$thisField);
}
else if (form === 'descriptions') {
$thisLabel = $('<label for="' + thisId + '"> ' + available[i]['label'] + '</label>');
if (thisPref === 'prefDescPause' || thisPref === 'prefDescVisible') {
// these preferences are checkboxes
$thisDiv.addClass('able-prefs-checkbox');
$thisField = $('<input>',{
type: 'checkbox',
name: thisPref,
id: thisId,
value: 'true'
});
// check current active value for this preference
if (this[thisPref] === 1) {
$thisField.prop('checked',true);
}
$thisDiv.append($thisField,$thisLabel);
}
else if (this.synth) {
// Only show these options if browser supports speech synthesis
$thisDiv.addClass('able-prefs-select');
$thisField = $('<select>',{
name: thisPref,
id: thisId,
});
if (thisPref === 'prefDescVoice' && this.descVoices.length) {
prefDescVoice = this.getPrefDescVoice();
for (j=0; j < this.descVoices.length; j++) {
optionValue = this.descVoices[j].name;
optionLang = this.descVoices[j].lang.substring(0,2).toLowerCase();
optionText = optionValue + ' (' + this.descVoices[j].lang + ')';
$thisOption = $('<option>',{
'value': optionValue,
'data-lang': optionLang,
text: optionText
});
if (prefDescVoice === optionValue) {
$thisOption.prop('selected',true);
}
$thisField.append($thisOption);
}
this.$voiceSelectField = $thisField;
}
else {
if (thisPref == 'prefDescPitch') { // 0 to 2
options = [0,0.5,1,1.5,2];
}
else if (thisPref == 'prefDescRate') { // 0.1 to 10
// Tests with a variety of voices on MacOS and Windows
// yielded the following choices that seem reasonable for audio description:
// 0.5 - too slow (exclude this)
// 0.7 - casual
// 0.8 - add this
// 0.9 - add this
// 1 - normal
// 1.1 - add this
// 1.2 - add this
// 1.5 - quick
// 2 - speedy
// 2.5 - fleet
// 3 - fast! (some voices don't get any faster than this
// Note: if these values are modified, must also modfiy them
// in makePrefsValueReadable()
options = [0.7,0.8,0.9,1,1.1,1.2,1.5,2,2.5,3];
}
else if (thisPref == 'prefDescVolume') { // 0 (mute) to 1
options = [0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1];
}
if (typeof options !== 'undefined') {
for (j=0; j < options.length; j++) {
optionValue = options[j];
optionText = this.makePrefsValueReadable(thisPref,optionValue);
$thisOption = $('<option>',{
value: optionValue,
text: optionText
});
if (this[thisPref] == optionValue) {
$thisOption.prop('selected',true);
}
$thisField.append($thisOption);
$thisDiv.append($thisLabel,$thisField);
}
}
}
// add a change handler that announces the sample description text
$thisField.on('change',function() {
thisObj.announceDescriptionText('sample',thisObj.currentSampleText);
});
$thisDiv.append($thisLabel,$thisField);
}
}
else { // all other fields are checkboxes
$thisLabel = $('<label for="' + thisId + '"> ' + available[i]['label'] + '</label>');
$thisField = $('<input>',{
type: 'checkbox',
name: thisPref,
id: thisId,
value: 'true'
});
// check current active value for this preference
if (this[thisPref] === 1) {
$thisField.prop('checked',true);
}
if (form === 'keyboard') {
// add a change handler that updates the list of current keyboard shortcuts
$thisField.on('change',function() {
changedPref = $(this).attr('name');
if (changedPref === 'prefAltKey') {
changedSpan = '.able-modkey-alt';
changedText = thisObj.tt.prefAltKey + ' + ';
}
else if (changedPref === 'prefCtrlKey') {
changedSpan = '.able-modkey-ctrl';
changedText = thisObj.tt.prefCtrlKey + ' + ';
}
else if (changedPref === 'prefShiftKey') {
changedSpan = '.able-modkey-shift';
changedText = thisObj.tt.prefShiftKey + ' + ';
}
if ($(this).is(':checked')) {
$(changedSpan).text(changedText);
}
else {
$(changedSpan).text('');
}
});
}
$thisDiv.append($thisField,$thisLabel);
}
if (thisPref === 'prefDescVoice' && !this.descVoices.length) {
// No voices are available (e.g., in Safari 15.4 on Mac OS)
// Do not add a Voice select field
}
else {
$fieldset.append($thisDiv);
}
}
}
$prefsDiv.append($fieldset);
if (form === 'captions') {
// add a sample closed caption div to prefs dialog
// do not show this for YouTube captions, since it's not an accurate reflection
if (!this.usingYouTubeCaptions) {
this.$sampleCapsDiv = $('<div>',{
'class': 'able-captions-sample'
}).text(this.tt.sampleCaptionText);
$prefsDiv.append(this.$sampleCapsDiv);
this.stylizeCaptions(this.$sampleCapsDiv);
}
}
else if (form === 'descriptions') {
if (this.synth) {
// add a div with sample audio description text
this.$sampleDescDiv = $('<div>',{
'class': 'able-desc-sample'
}).text(this.tt.sampleDescriptionText);
$prefsDiv.append(this.$sampleDescDiv);
this.currentSampleText = this.tt.sampleDescriptionText;
}
}
else if (form === 'keyboard') {
// add a current list of keyboard shortcuts
$kbHeading = $('<h2>',{
text: this.tt.prefHeadingKeyboard2
});
$kbList = $('<ul>');
// create arrays of kbLabels and keys
kbLabels = [];
keys = [];
for (i=0; i<this.controls.length; i++) {
if (this.controls[i] === 'play') {
kbLabels.push(this.tt.play + '/' + this.tt.pause);
keys.push('p</span> <em>' + this.tt.or + '</em> <span class="able-help-modifiers"> ' + this.tt.spacebar);
}
else if (this.controls[i] === 'restart') {
kbLabels.push(this.tt.restart);
keys.push('s');
}
else if (this.controls[i] === 'previous') {
kbLabels.push(this.tt.prevTrack);
keys.push('b'); // b = back
}
else if (this.controls[i] === 'next') {
kbLabels.push(this.tt.nextTrack);
keys.push('n');
}
else if (this.controls[i] === 'rewind') {
kbLabels.push(this.tt.rewind);
keys.push('r');
}
else if (this.controls[i] === 'forward') {
kbLabels.push(this.tt.forward);
keys.push('f');
}
else if (this.controls[i] === 'volume') {
kbLabels.push(this.tt.volume);
keys.push('v</span> <em>' + this.tt.or + '</em> <span class="able-modkey">1-9');
// mute toggle
kbLabels.push(this.tt.mute + '/' + this.tt.unmute);
keys.push('m');
}
else if (this.controls[i] === 'captions') {
if (this.captions.length > 1) {
// caption button launches a Captions popup menu
kbLabels.push(this.tt.captions);
}
else {
// there is only one caption track
// therefore caption button is a toggle
if (this.captionsOn) {
kbLabels.push(this.tt.hideCaptions);
}
else {
kbLabels.push(this.tt.showCaptions);
}
}
keys.push('c');
}
else if (this.controls[i] === 'descriptions') {
if (this.descOn) {
kbLabels.push(this.tt.turnOffDescriptions);
}
else {
kbLabels.push(this.tt.turnOnDescriptions);
}
keys.push('d');
}
else if (this.controls[i] === 'prefs') {
kbLabels.push(this.tt.preferences);
keys.push('e');
}
else if (this.controls[i] === 'help') {
kbLabels.push(this.tt.help);
keys.push('h');
}
}
for (i=0; i<keys.length; i++) {
// alt
kbListText = '<span class="able-modkey-alt">';
if (this.prefAltKey === 1) {
kbListText += this.tt.prefAltKey + ' + ';
}
kbListText += '</span>';
// ctrl
kbListText += '<span class="able-modkey-ctrl">';
if (this.prefCtrlKey === 1) {
kbListText += this.tt.prefCtrlKey + ' + ';
}
kbListText += '</span>';
// shift
kbListText += '<span class="able-modkey-shift">';
if (this.prefShiftKey === 1) {
kbListText += this.tt.prefShiftKey + ' + ';
}
kbListText += '</span>';
kbListText += '<span class="able-modkey">' + keys[i] + '</span>';
kbListText += ' = ' + kbLabels[i];
$kbListItem = $('<li>',{
html: kbListText
});
$kbList.append($kbListItem);
}
// add Escape key
kbListText = '<span class="able-modkey">' + this.tt.escapeKey + '</span>';
kbListText += ' = ' + this.tt.escapeKeyFunction;
$kbListItem = $('<li>',{
html: kbListText
});
$kbList.append($kbListItem);
// put it all together
$prefsDiv.append($kbHeading,$kbList);
}
// $prefsDiv (dialog) must be appended to the BODY!
// otherwise when aria-hidden="true" is applied to all background content
// that will include an ancestor of the dialog,
// which will render the dialog unreadable by screen readers
$('body').append($prefsDiv);
dialog = new AccessibleDialog($prefsDiv, this.$prefsButton, 'dialog', true, formTitle, $prefsIntro, thisObj.tt.closeButtonLabel, false);
// Add save and cancel buttons.
$prefsDiv.append('<hr>');
saveButton = $('<button class="modal-button">' + this.tt.save + '</button>');
cancelButton = $('<button class="modal-button">' + this.tt.cancel + '</button>');
saveButton.on( 'click', function () {
dialog.hide();
thisObj.savePrefsFromForm();
});
cancelButton.on( 'click', function () {
dialog.hide();
thisObj.resetPrefsForm();
});
$prefsDiv.append(saveButton);
$prefsDiv.append(cancelButton);
// Associate the dialog's H1 as aria-labelledby for groups of fields
// (alternative to fieldset and legend)
if (form === 'captions' || form === 'transcript') {
$fieldset.attr('aria-labelledby',dialog.titleH1.attr('id'));
}
// add global reference for future control
if (form === 'captions') {
this.captionPrefsDialog = dialog;
}
else if (form === 'descriptions') {
this.descPrefsDialog = dialog;
}
else if (form === 'keyboard') {
this.keyboardPrefsDialog = dialog;
}
else if (form === 'transcript') {
this.transcriptPrefsDialog = dialog;
}
// Add click handler for dialog close button
// (button is added in dialog.js)
$('div.able-prefs-form button.modalCloseButton').on( 'click', function() {
thisObj.resetPrefsForm();
})
// Add handler for escape key
$('div.able-prefs-form').on( 'keydown', function(e) {
if (e.key === 'Escape') {
thisObj.resetPrefsForm();
}
});
};
AblePlayer.prototype.getPrefDescVoice = function () {
// return user's preferred voice for the current language from cookie.voices
var lang, cookie, i;
if (this.selectedDescriptions) {
lang = this.selectedDescriptions.language;
}
else if (this.captionLang) {
lang = this.captionLang;
}
else {
lang = this.lang;
}
cookie = this.getCookie();
if (cookie.voices) {
for (i=0; i < cookie.voices.length; i++) {
if (cookie.voices[i].lang === lang) {
return cookie.voices[i].name;
}
}
}
return null; // user has no saved preference
}
AblePlayer.prototype.rebuildDescPrefsForm = function () {
// Called if this.descVoices changes, which may happen if:
// getBrowserVoices() succeeds after an earlier failure
// user changes language of captions/subtitles and descVoices changes to match the new language
var i, optionValue, optionText, $thisOption;
this.$voiceSelectField = $('#' + this.mediaId + '_prefDescVoice');
this.$voiceSelectField.empty();
for (i=0; i < this.descVoices.length; i++) {
optionValue = this.descVoices[i].name;
optionText = optionValue + ' (' + this.descVoices[i].lang + ')';
$thisOption = $('<option>',{
'value': optionValue,
'data-lang': this.descVoices[i].lang.substring(0,2).toLowerCase(),
text: optionText
});
if (this.prefDescVoice == optionValue) {
$thisOption.prop('selected',true);
}
this.$voiceSelectField.append($thisOption);
}
};
AblePlayer.prototype.makePrefsValueReadable = function(pref,value) {
// The values for pitch, rate, and volume (web speech API)
// are strange and inconsistent between variables
// this function returns text that is more readable than the values themselves
if (pref === 'prefDescPitch') {
if (value === 0) {
return this.tt.prefDescPitch1;
}
else if (value === 0.5) {
return this.tt.prefDescPitch2;
}
else if (value === 1) {
return this.tt.prefDescPitch3;
}
else if (value === 1.5) {
return this.tt.prefDescPitch4;
}
else if (value === 2) {
return this.tt.prefDescPitch5;
}
}
else if (pref === 'prefDescRate') {
// default in the API is 0.1 to 10, where 1 is normal speaking voice
// our custom range offers several rates close to 1
// plus a couple of crazy fast ones for sport
// Our more readable options (1-10) or mapped here to API values
if (value === 0.7) {
return 1;
}
else if (value === 0.8) {
return 2;
}
else if (value === 0.9) {
return 3;
}
else if (value === 1) {
return 4;
}
else if (value === 1.1) {
return 5;
}
else if (value === 1.2) {
return 6;
}
else if (value === 1.5) {
return 7;
}
else if (value === 2) {
return 8;
}
else if (value === 2.5) {
return 9;
}
else if (value === 3) {
return 10;
}
}
else if (pref === 'prefDescVolume') {
// values range from 0.1 to 1.0
return value * 10;
}
return value;
};
AblePlayer.prototype.resetPrefsForm = function () {
// Reset preferences form with default values from cookie
// Called when:
// User clicks cancel or close button in Prefs Dialog
// User presses Escape to close Prefs dialog
// User clicks Save in Prefs dialog, & there's more than one player on page
var thisObj, cookie, available, i, prefName, prefId, thisDiv, thisId;
thisObj = this;
cookie = this.getCookie();
available = this.getAvailablePreferences();
for (i=0; i<available.length; i++) {
prefName = available[i]['name'];
prefId = this.mediaId + '_' + prefName;
if ((prefName.indexOf('Captions') !== -1) && (prefName !== 'prefCaptions')) {
// this is a caption-related select box
$('select[name="' + prefName + '"]').val(cookie.preferences[prefName]);
}
else { // all others are checkboxes
if (this[prefName] === 1) {
$('input[name="' + prefName + '"]').prop('checked',true);
}
else {
$('input[name="' + prefName + '"]').prop('checked',false);
}
}
}
// also restore style of sample caption div
this.stylizeCaptions(this.$sampleCapsDiv);
};
AblePlayer.prototype.savePrefsFromForm = function () {
// Return a prefs object constructed from the form.
// called when user saves the Preferences form
// update cookie with new value
var cookie, available, prefName, prefId,
voiceSelectId, newVoice, newVoiceLang, numChanges, voiceLangFound,
numCapChanges, capSizeChanged, capSizeValue, newValue;
numChanges = 0;
numCapChanges = 0; // changes to caption-style-related preferences
capSizeChanged = false;
cookie = this.getCookie();
available = this.getAvailablePreferences();
for (var i=0; i < available.length; i++) {