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Website : rimsha.abasa.com
: / var / canvas / node_modules / mediaelement / src / js /
Filename : mep-feature-speed.js
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(function($) {

	// Speed
	$.extend(mejs.MepDefaults, {

		// We also support to pass object like this:
		// [{name: 'Slow', value: '0.75'}, {name: 'Normal', value: '1.00'}, ...]
		speeds: ['2.00', '1.50', '1.25', '1.00', '0.75'],

		defaultSpeed: '1.00',

		speedChar: 'x',

		speedLabel: 'Change playback speed'
	});

	$.extend(MediaElementPlayer.prototype, {

		buildspeed: function(player, controls, layers, media) {
			var t = this;
			var hoverTimeout;

			if (t.media.pluginType == 'native') {
				var
					speedButton = null,
					speedSelector = null,
					playbackSpeed = null,
					inputId = null,
					isCurrent = null;

				var speeds = [];
				var defaultInArray = false;
				for (var i=0, len=t.options.speeds.length; i < len; i++) {
					var s = t.options.speeds[i];
					if (typeof(s) === 'string'){
						speeds.push({
							name: s + t.options.speedChar,
							value: s
						});
						if(s === t.options.defaultSpeed) {
							defaultInArray = true;
						}
					}
					else {
						speeds.push(s);
						if(s.value === t.options.defaultSpeed) {
							defaultInArray = true;
						}
					}
				}

				if (!defaultInArray) {
					speeds.push({
						name: t.options.defaultSpeed + t.options.speedChar,
						value: t.options.defaultSpeed
					});
				}

				speeds.sort(function(a, b) {
					return parseFloat(b.value) - parseFloat(a.value);
				});

				var getSpeedNameFromValue = function(value) {
					for(i=0,len=speeds.length; i <len; i++) {
						if (speeds[i].value === value) {
							return speeds[i].name;
						}
					}
				};

				var speedLabel = function(speed) {
					return mejs.i18n.t(t.options.speedLabel + ': Current speed ' + getSpeedNameFromValue(speed));
				}

				var html = '<div class="mejs-button mejs-speed-button">' +
							'<button role="button" aria-haspopup="true" aria-controls="' + t.id + '" type="button" aria-label="' + speedLabel(t.options.defaultSpeed) + '" aria-live="assertive">' + getSpeedNameFromValue(t.options.defaultSpeed) + '</button>' +
							'<div class="mejs-speed-selector mejs-offscreen" role="menu" aria-expanded="false" aria-hidden="true">' +
							'<ul>';

				for (i = 0, il = speeds.length; i<il; i++) {
					inputId = t.id + '-speed-' + speeds[i].value;
					isCurrent = (speeds[i].value === t.options.defaultSpeed);
					html += '<li>' +
								'<input type="radio" name="speed" role="menuitemradio"' +
											'value="' + speeds[i].value + '" ' +
											'id="' + inputId + '" ' +
											(isCurrent ? ' checked="checked"' : '') +
											' aria-selected="' + isCurrent + '"' +
											' aria-label="' + getSpeedNameFromValue(speeds[i].value) + '"' +
											' tabindex="-1"' +
											' />' +
								'<label for="' + inputId + '" ' + 'aria-hidden="true"' +
											(isCurrent ? ' class="mejs-speed-selected"' : '') +
											'>' + speeds[i].name + '</label>' +
							'</li>';
				}
				html += '</ul></div></div>';

				player.speedButton = speedButton = $(html).appendTo(controls);
				speedSelector = speedButton.find('.mejs-speed-selector');

				playbackSpeed = t.options.defaultSpeed;

				media.addEventListener('loadedmetadata', function(e) {
					if (playbackSpeed) {
						media.playbackRate = parseFloat(playbackSpeed);
					}
				}, true);

				speedSelector
					.on('click', 'input[type="radio"]', function() {
						// set aria states
						$(this).attr('aria-selected', true).attr('checked', 'checked');
						$(this).closest('.mejs-speed-selector').find('input[type=radio]').not(this).attr('aria-selected', 'false').removeAttr('checked');

						var newSpeed = $(this).attr('value');
						playbackSpeed = newSpeed;
                                               var newPlaybackRate = parseFloat(newSpeed);
						media.playbackRate = newPlaybackRate;

                                               // IE11 doesn't remember the user-selected playbackRate once
                                               // clicking play/pause after setting the rate, so we save
                                               // the value to `this` and reference it in the play/pause handler
                                               // see: mep-feature-playpause.js
                                               t.options.playbackRate = newPlaybackRate;

                                               speedButton.find('button')
							.html(getSpeedNameFromValue(newSpeed))
							.attr('aria-label', speedLabel(newSpeed));
						speedButton.find('.mejs-speed-selected').removeClass('mejs-speed-selected');
						speedButton.find('input[type="radio"]:checked').next().addClass('mejs-speed-selected');
					});
				speedButton
				// set size on demand
					.one( 'mouseenter focusin', function() {
						speedSelector
							.height(
								speedButton.find('.mejs-speed-selector ul').outerHeight(true) +
								speedButton.find('.mejs-speed-translations').outerHeight(true))
							.css('top', (-1 * speedSelector.height()) + 'px');
						})

						// hover
						.hover(function() {
							clearTimeout(hoverTimeout);
							player.showSpeedSelector();
						}, function() {
							hoverTimeout = setTimeout(function () {
								player.hideSpeedSelector();
							}, t.options.menuTimeoutMouseLeave);
						})

						// keyboard menu activation
						.on('keydown', function (e) {
							var keyCode = e.keyCode;

							switch (keyCode) {
							case 32: // space
								if (!mejs.MediaFeatures.isFirefox) { // space sends the click event in Firefox
									player.showSpeedSelector();
								}
								$(this).find('.mejs-speed-selector')
									.find('input[type=radio]:checked').first().focus();
								break;
							case 13: // enter
								player.showSpeedSelector();
								$(this).find('.mejs-speed-selector')
									.find('input[type=radio]:checked').first().focus();
								break;
							case 27: // esc
								player.hideSpeedSelector();
								$(this).find('button').focus();
								break;
							default:
								return true;
						}
					})

					// close menu when tabbing away
					.on('focusout', mejs.Utility.debounce(function (e) { // Safari triggers focusout multiple times
						// Firefox does NOT support e.relatedTarget to see which element
						// just lost focus, so wait to find the next focused element
						setTimeout(function () {
							var parent = $(document.activeElement).closest('.mejs-speed-selector');
							if (!parent.length) {
								// focus is outside the control; close menu
								player.hideSpeedSelector();
							}
						}, 0);
					}, 100))

					// Handle click so that screen readers can toggle the menu
					.on('click', 'button', function (e) {
						if ($(this).siblings('.mejs-speed-selector').hasClass('mejs-offscreen')) {
							player.showSpeedSelector();
							$(this).siblings('.mejs-speed-selector').find('input[type=radio]:checked').first().focus();
						} else {
							player.hideSpeedSelector();
						}
					});
			}
		},

		hideSpeedSelector: function () {
			this.speedButton.find('.mejs-speed-selector')
				.addClass('mejs-offscreen')
				.attr('aria-expanded', 'false')
				.attr('aria-hidden', 'true')
				.find('input[type=radio]') // make radios not focusable
				.attr('tabindex', '-1');
		},

		showSpeedSelector: function () {
			this.speedButton.find('.mejs-speed-selector')
				.removeClass('mejs-offscreen')
				.attr('aria-expanded', 'true')
				.attr('aria-hidden', 'false')
				.find('input[type=radio]')
				.attr('tabindex', '0');
		}
	});

})(mejs.$);