abstract_mathjax.js revision cedac228d2dd51db4b79ea1e72c7f249408ee061 
1// Copyright 2014 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 Implentation of ChromeVox's bridge to MathJax.
7 *
8 */
9
10goog.provide('cvox.AbstractMathJax');
11
12goog.require('cvox.MathJaxInterface');
13
14
15/**
16 * Creates a new instance.
17 * @constructor
18 * @implements {cvox.MathJaxInterface}
19 */
20cvox.AbstractMathJax = function() {
21};
22
23
24/**
25 * @override
26 */
27cvox.AbstractMathJax.prototype.isMathjaxActive = goog.abstractMethod;
28
29
30/**
31 * @override
32 */
33cvox.AbstractMathJax.prototype.getAllJax = goog.abstractMethod;
34
35
36/**
37 * @override
38 */
39cvox.AbstractMathJax.prototype.registerSignal = goog.abstractMethod;
40
41
42/**
43 * @override
44 */
45cvox.AbstractMathJax.prototype.getTex = goog.abstractMethod;
46
47
48/**
49 * @override
50 */
51cvox.AbstractMathJax.prototype.getAsciiMath = goog.abstractMethod;
52
53
54/**
55 * @override
56 */
57cvox.AbstractMathJax.prototype.injectScripts = goog.abstractMethod;
58
59
60/**
61 * @override
62 */
63cvox.AbstractMathJax.prototype.configMediaWiki = goog.abstractMethod;
64
65
66/**
67 * Get MathML represententations for all images that have latex alt text.
68 * @param {function(Node, string)} callback A function taking a MathML node and
69 * an id string.
70 */
71cvox.AbstractMathJax.prototype.getAllTexs = function(callback) {
72  var allTexs = document.
73      querySelectorAll(cvox.DomUtil.altMathQuerySelector('tex'));
74  for (var i = 0, tex; tex = allTexs[i]; i++) {
75    this.getTex(callback, tex);
76  }
77};
78
79
80/**
81 * Get MathML represententations for all images that have asciimath alt text.
82 * @param {function(Node, string)} callback A function taking a MathML node and
83 * an id string.
84 */
85cvox.AbstractMathJax.prototype.getAllAsciiMaths = function(callback) {
86  var allAsciiMaths = document.
87      querySelectorAll(cvox.DomUtil.altMathQuerySelector('asciimath'));
88  for (var i = 0, tex; tex = allAsciiMaths[i]; i++) {
89    this.getAsciiMath(callback, tex);
90  }
91};
92
93
94/**
95 * Converts a XML markup string to a DOM node and applies a callback function.
96 * The function is generally used in the context of retrieving a MathJax
97 * element's MathML representation and converting it from a string. The callback
98 * is therefore use by MathJax internally in case the requested MathML
99 * representation is not ready yet.
100 * @param {function(Node, string)} callback A function taking a node and an id
101 * string.
102 * @param {string} mml The MathML string.
103 * @param {string} id The Mathjax node id.
104 */
105cvox.AbstractMathJax.prototype.convertMarkupToDom = function(
106    callback, mml, id) {
107  if (mml) {
108    var dp = new DOMParser;
109    var cleanMml = mml.replace(/>\s+</g, '><');
110    callback(dp.parseFromString(cleanMml, 'text/xml').firstChild, id);
111  }
112};
113