chrome/browser/resources/chromeos/chromevox/braille/spans.js

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 /**
   6  * @fileoverview Objects used in spannables as annotations for ARIA values
   7  * and selections.
   8  */
   9
  10 goog.provide('cvox.ValueSelectionSpan');
  11 goog.provide('cvox.ValueSpan');
  12
  13 goog.require('cvox.Spannable');
  14
  15 /**
  16  * Attached to the value region of a braille spannable.
  17  * @param {number} offset The offset of the span into the value.
  18  * @constructor
  19  */
  20 cvox.ValueSpan = function(offset) {
  21   /**
  22    * The offset of the span into the value.
  23    * @type {number}
  24    */
  25   this.offset = offset;
  26 };
  27
  28
  29 /**
  30  * Creates a value span from a json serializable object.
  31  * @param {!Object} obj The json serializable object to convert.
  32  * @return {!cvox.ValueSpan} The value span.
  33  */
  34 cvox.ValueSpan.fromJson = function(obj) {
  35   return new cvox.ValueSpan(obj.offset);
  36 };
  37
  38
  39 /**
  40  * Converts this object to a json serializable object.
  41  * @return {!Object} The JSON representation.
  42  */
  43 cvox.ValueSpan.prototype.toJson = function() {
  44   return this;
  45 };
  46
  47
  48 cvox.Spannable.registerSerializableSpan(
  49     cvox.ValueSpan,
  50     'cvox.ValueSpan',
  51     cvox.ValueSpan.fromJson,
  52     cvox.ValueSpan.prototype.toJson);
  53
  54
  55 /**
  56  * Attached to the selected text within a value.
  57  * @constructor
  58  */
  59 cvox.ValueSelectionSpan = function() {
  60 };
  61
  62
  63 cvox.Spannable.registerStatelessSerializableSpan(
  64     cvox.ValueSelectionSpan,
  65     'cvox.ValueSelectionSpan');