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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @fileoverview Implentation of ChromeVox's bridge to MathJax.
*
*/
goog.provide('cvox.AbstractMathJax');
goog.require('cvox.MathJaxInterface');
/**
* Creates a new instance.
* @constructor
* @implements {cvox.MathJaxInterface}
*/
cvox.AbstractMathJax = function() {
};
/**
* @override
*/
cvox.AbstractMathJax.prototype.isMathjaxActive = goog.abstractMethod;
/**
* @override
*/
cvox.AbstractMathJax.prototype.getAllJax = goog.abstractMethod;
/**
* @override
*/
cvox.AbstractMathJax.prototype.registerSignal = goog.abstractMethod;
/**
* @override
*/
cvox.AbstractMathJax.prototype.getTex = goog.abstractMethod;
/**
* @override
*/
cvox.AbstractMathJax.prototype.getAsciiMath = goog.abstractMethod;
/**
* @override
*/
cvox.AbstractMathJax.prototype.injectScripts = goog.abstractMethod;
/**
* @override
*/
cvox.AbstractMathJax.prototype.configMediaWiki = goog.abstractMethod;
/**
* Get MathML represententations for all images that have latex alt text.
* @param {function(Node, string)} callback A function taking a MathML node and
* an id string.
*/
cvox.AbstractMathJax.prototype.getAllTexs = function(callback) {
var allTexs = document.
querySelectorAll(cvox.DomUtil.altMathQuerySelector('tex'));
for (var i = 0, tex; tex = allTexs[i]; i++) {
this.getTex(callback, tex);
}
};
/**
* Get MathML represententations for all images that have asciimath alt text.
* @param {function(Node, string)} callback A function taking a MathML node and
* an id string.
*/
cvox.AbstractMathJax.prototype.getAllAsciiMaths = function(callback) {
var allAsciiMaths = document.
querySelectorAll(cvox.DomUtil.altMathQuerySelector('asciimath'));
for (var i = 0, tex; tex = allAsciiMaths[i]; i++) {
this.getAsciiMath(callback, tex);
}
};
/**
* Converts a XML markup string to a DOM node and applies a callback function.
* The function is generally used in the context of retrieving a MathJax
* element's MathML representation and converting it from a string. The callback
* is therefore use by MathJax internally in case the requested MathML
* representation is not ready yet.
* @param {function(Node, string)} callback A function taking a node and an id
* string.
* @param {string} mml The MathML string.
* @param {string} id The Mathjax node id.
*/
cvox.AbstractMathJax.prototype.convertMarkupToDom = function(
callback, mml, id) {
if (mml) {
var dp = new DOMParser;
var cleanMml = mml.replace(/>\s+</g, '><');
callback(dp.parseFromString(cleanMml, 'text/xml').firstChild, id);
}
};
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