--- /dev/null
+/**
+ * Copyright 2013 vtt.js Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+(function(root, vttjs) {
+
+ var autoKeyword = "auto";
+ var directionSetting = {
+ "": true,
+ "lr": true,
+ "rl": true
+ };
+ var alignSetting = {
+ "start": true,
+ "middle": true,
+ "end": true,
+ "left": true,
+ "right": true
+ };
+
+ function findDirectionSetting(value) {
+ if (typeof value !== "string") {
+ return false;
+ }
+ var dir = directionSetting[value.toLowerCase()];
+ return dir ? value.toLowerCase() : false;
+ }
+
+ function findAlignSetting(value) {
+ if (typeof value !== "string") {
+ return false;
+ }
+ var align = alignSetting[value.toLowerCase()];
+ return align ? value.toLowerCase() : false;
+ }
+
+ function extend(obj) {
+ var i = 1;
+ for (; i < arguments.length; i++) {
+ var cobj = arguments[i];
+ for (var p in cobj) {
+ obj[p] = cobj[p];
+ }
+ }
+
+ return obj;
+ }
+
+ function VTTCue(startTime, endTime, text) {
+ var cue = this;
+ var isIE8 = (/MSIE\s8\.0/).test(navigator.userAgent);
+ var baseObj = {};
+
+ if (isIE8) {
+ cue = document.createElement('custom');
+ } else {
+ baseObj.enumerable = true;
+ }
+
+ /**
+ * Shim implementation specific properties. These properties are not in
+ * the spec.
+ */
+
+ // Lets us know when the VTTCue's data has changed in such a way that we need
+ // to recompute its display state. This lets us compute its display state
+ // lazily.
+ cue.hasBeenReset = false;
+
+ /**
+ * VTTCue and TextTrackCue properties
+ * http://dev.w3.org/html5/webvtt/#vttcue-interface
+ */
+
+ var _id = "";
+ var _pauseOnExit = false;
+ var _startTime = startTime;
+ var _endTime = endTime;
+ var _text = text;
+ var _region = null;
+ var _vertical = "";
+ var _snapToLines = true;
+ var _line = "auto";
+ var _lineAlign = "start";
+ var _position = 50;
+ var _positionAlign = "middle";
+ var _size = 50;
+ var _align = "middle";
+
+ Object.defineProperty(cue,
+ "id", extend({}, baseObj, {
+ get: function() {
+ return _id;
+ },
+ set: function(value) {
+ _id = "" + value;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "pauseOnExit", extend({}, baseObj, {
+ get: function() {
+ return _pauseOnExit;
+ },
+ set: function(value) {
+ _pauseOnExit = !!value;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "startTime", extend({}, baseObj, {
+ get: function() {
+ return _startTime;
+ },
+ set: function(value) {
+ if (typeof value !== "number") {
+ throw new TypeError("Start time must be set to a number.");
+ }
+ _startTime = value;
+ this.hasBeenReset = true;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "endTime", extend({}, baseObj, {
+ get: function() {
+ return _endTime;
+ },
+ set: function(value) {
+ if (typeof value !== "number") {
+ throw new TypeError("End time must be set to a number.");
+ }
+ _endTime = value;
+ this.hasBeenReset = true;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "text", extend({}, baseObj, {
+ get: function() {
+ return _text;
+ },
+ set: function(value) {
+ _text = "" + value;
+ this.hasBeenReset = true;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "region", extend({}, baseObj, {
+ get: function() {
+ return _region;
+ },
+ set: function(value) {
+ _region = value;
+ this.hasBeenReset = true;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "vertical", extend({}, baseObj, {
+ get: function() {
+ return _vertical;
+ },
+ set: function(value) {
+ var setting = findDirectionSetting(value);
+ // Have to check for false because the setting an be an empty string.
+ if (setting === false) {
+ throw new SyntaxError("An invalid or illegal string was specified.");
+ }
+ _vertical = setting;
+ this.hasBeenReset = true;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "snapToLines", extend({}, baseObj, {
+ get: function() {
+ return _snapToLines;
+ },
+ set: function(value) {
+ _snapToLines = !!value;
+ this.hasBeenReset = true;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "line", extend({}, baseObj, {
+ get: function() {
+ return _line;
+ },
+ set: function(value) {
+ if (typeof value !== "number" && value !== autoKeyword) {
+ throw new SyntaxError("An invalid number or illegal string was specified.");
+ }
+ _line = value;
+ this.hasBeenReset = true;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "lineAlign", extend({}, baseObj, {
+ get: function() {
+ return _lineAlign;
+ },
+ set: function(value) {
+ var setting = findAlignSetting(value);
+ if (!setting) {
+ throw new SyntaxError("An invalid or illegal string was specified.");
+ }
+ _lineAlign = setting;
+ this.hasBeenReset = true;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "position", extend({}, baseObj, {
+ get: function() {
+ return _position;
+ },
+ set: function(value) {
+ if (value < 0 || value > 100) {
+ throw new Error("Position must be between 0 and 100.");
+ }
+ _position = value;
+ this.hasBeenReset = true;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "positionAlign", extend({}, baseObj, {
+ get: function() {
+ return _positionAlign;
+ },
+ set: function(value) {
+ var setting = findAlignSetting(value);
+ if (!setting) {
+ throw new SyntaxError("An invalid or illegal string was specified.");
+ }
+ _positionAlign = setting;
+ this.hasBeenReset = true;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "size", extend({}, baseObj, {
+ get: function() {
+ return _size;
+ },
+ set: function(value) {
+ if (value < 0 || value > 100) {
+ throw new Error("Size must be between 0 and 100.");
+ }
+ _size = value;
+ this.hasBeenReset = true;
+ }
+ }));
+
+ Object.defineProperty(cue,
+ "align", extend({}, baseObj, {
+ get: function() {
+ return _align;
+ },
+ set: function(value) {
+ var setting = findAlignSetting(value);
+ if (!setting) {
+ throw new SyntaxError("An invalid or illegal string was specified.");
+ }
+ _align = setting;
+ this.hasBeenReset = true;
+ }
+ }));
+
+ /**
+ * Other <track> spec defined properties
+ */
+
+ // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state
+ cue.displayState = undefined;
+
+ if (isIE8) {
+ return cue;
+ }
+ }
+
+ /**
+ * VTTCue methods
+ */
+
+ VTTCue.prototype.getCueAsHTML = function() {
+ // Assume WebVTT.convertCueToDOMTree is on the global.
+ return WebVTT.convertCueToDOMTree(window, this.text);
+ };
+
+ root.VTTCue = root.VTTCue || VTTCue;
+ vttjs.VTTCue = VTTCue;
+}(this, (this.vttjs || {})));
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