/*************************************************************
*
* MathJax/extensions/mml2jax.js
*
* Implements the MathML to Jax preprocessor that locates <math> nodes
* within the text of a document and replaces them with SCRIPT tags
* for processing by MathJax.
*
* ---------------------------------------------------------------------
*
* Copyright (c) 2010-2012 Design Science, Inc.
*
* 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.
*/
MathJax.Extension.mml2jax = {
version: "2.0",
config: {
preview: "alttext" // Use the <math> element's alttext as the
// preview. Set to "none" for no preview,
// or set to an array specifying an HTML snippet
// to use a fixed preview for all math
},
MMLnamespace: "http://www.w3.org/1998/Math/MathML",
PreProcess: function (element) {
if (!this.configured) {
this.config = MathJax.Hub.CombineConfig("mml2jax",this.config);
if (this.config.Augment) {MathJax.Hub.Insert(this,this.config.Augment)}
this.InitBrowser();
this.configured = true;
}
if (typeof(element) === "string") {element = document.getElementById(element)}
if (!element) {element = document.body}
//
// Handle all math tags with no namespaces
//
this.ProcessMathArray(element.getElementsByTagName("math"));
//
// Handle math with namespaces in XHTML
//
if (element.getElementsByTagNameNS)
{this.ProcessMathArray(element.getElementsByTagNameNS(this.MMLnamespace,"math"))}
//
// Handle math with namespaces in HTML
//
var i, m;
if (document.namespaces) {
//
// IE namespaces are listed in document.namespaces
//
for (i = 0, m = document.namespaces.length; i < m; i++) {
var ns = document.namespaces[i];
if (ns.urn === this.MMLnamespace)
{this.ProcessMathArray(element.getElementsByTagName(ns.name+":math"))}
}
} else {
//
// Everybody else
//
var html = document.getElementsByTagName("html")[0];
if (html) {
for (i = 0, m = html.attributes.length; i < m; i++) {
var attr = html.attributes[i];
if (attr.nodeName.substr(0,6) === "xmlns:" && attr.nodeValue === this.MMLnamespace)
{this.ProcessMathArray(element.getElementsByTagName(attr.nodeName.substr(6)+":math"))}
}
}
}
},
ProcessMathArray: function (math) {
var i;
if (math.length) {
if (this.MathTagBug) {
for (i = math.length-1; i >= 0; i--) {
if (math[i].nodeName === "MATH") {this.ProcessMathFlattened(math[i])}
else {this.ProcessMath(math[i])}
}
} else {
for (i = math.length-1; i >= 0; i--) {this.ProcessMath(math[i])}
}
}
},
ProcessMath: function (math) {
var parent = math.parentNode;
var script = document.createElement("script");
script.type = "math/mml";
parent.insertBefore(script,math);
if (this.AttributeBug) {
var html = this.OuterHTML(math);
if (this.CleanupHTML) {
html = html.replace(/<\?import .*?>/i,"").replace(/<\?xml:namespace .*?\/>/i,"");
html = html.replace(/ /g," ");
}
MathJax.HTML.setScript(script,html); parent.removeChild(math);
} else {
var span = MathJax.HTML.Element("span"); span.appendChild(math);
MathJax.HTML.setScript(script,span.innerHTML);
}
if (this.config.preview !== "none") {this.createPreview(math,script)}
},
ProcessMathFlattened: function (math) {
var parent = math.parentNode;
var script = document.createElement("script");
script.type = "math/mml";
parent.insertBefore(script,math);
var mml = "", node, MATH = math;
while (math && math.nodeName !== "/MATH") {
node = math; math = math.nextSibling;
mml += this.NodeHTML(node);
node.parentNode.removeChild(node);
}
if (math && math.nodeName === "/MATH") {math.parentNode.removeChild(math)}
script.text = mml + "</math>";
if (this.config.preview !== "none") {this.createPreview(MATH,script)}
},
NodeHTML: function (node) {
var html, i, m;
if (node.nodeName === "#text") {
html = this.quoteHTML(node.nodeValue);
} else if (node.nodeName === "#comment") {
html = "<!--" + node.nodeValue + "-->"
} else {
// In IE, outerHTML doesn't properly quote attributes, so quote them by hand
// In Opera, HTML special characters aren't quoted in attributes, so quote them
html = "<"+node.nodeName.toLowerCase();
for (i = 0, m = node.attributes.length; i < m; i++) {
var attribute = node.attributes[i];
if (attribute.specified) {
// Opera 11.5 beta turns xmlns into xmlns:xmlns, so put it back (*** check after 11.5 is out ***)
html += " "+attribute.nodeName.toLowerCase().replace(/xmlns:xmlns/,"xmlns")+"=";
var value = attribute.nodeValue; // IE < 8 doesn't properly set style by setAttributes
if (value == null && attribute.nodeName === "style" && node.style) {value = node.style.cssText}
html += '"'+this.quoteHTML(value)+'"';
}
}
html += ">";
// Handle internal HTML (possibly due to <semantics> annotation or missing </math>)
if (node.outerHTML != null && node.outerHTML.match(/(.<\/[A-Z]+>|\/>)$/)) {
for (i = 0, m = node.childNodes.length; i < m; i++)
{html += this.OuterHTML(node.childNodes[i])}
html += "</"+node.nodeName.toLowerCase()+">";
}
}
return html;
},
OuterHTML: function (node) {
if (node.nodeName.charAt(0) === "#") {return this.NodeHTML(node)}
if (!this.AttributeBug) {return node.outerHTML}
var html = this.NodeHTML(node);
for (var i = 0, m = node.childNodes.length; i < m; i++)
{html += this.OuterHTML(node.childNodes[i]);}
html += "</"+node.nodeName.toLowerCase()+">";
return html;
},
quoteHTML: function (string) {
if (string == null) {string = ""}
return string.replace(/&/g,"&").replace(/</g,"<").replace(/>/g,">").replace(/"/g,""");
},
createPreview: function (math,script) {
var preview;
if (this.config.preview === "alttext") {
var text = math.getAttribute("alttext");
if (text != null) {preview = [this.filterPreview(text)]}
} else if (this.config.preview instanceof Array) {preview = this.config.preview}
if (preview) {
preview = MathJax.HTML.Element("span",{className:MathJax.Hub.config.preRemoveClass},preview);
script.parentNode.insertBefore(preview,script);
}
},
filterPreview: function (text) {return text},
InitBrowser: function () {
var test = MathJax.HTML.Element("span",{id:"<", className: "mathjax", innerHTML: "<math><mi>x</mi><mspace /></math>"});
var html = test.outerHTML || "";
this.AttributeBug = html !== "" && !(
html.match(/id="<"/) && // "<" should convert to "<"
html.match(/class="mathjax"/) && // IE leaves out quotes
html.match(/<\/math>/) // Opera 9 drops tags after self-closing tags
);
this.MathTagBug = test.childNodes.length > 1; // IE < 9 flattens unknown tags
this.CleanupHTML = MathJax.Hub.Browser.isMSIE; // remove namespace and other added tags
}
};
MathJax.Hub.Register.PreProcessor(["PreProcess",MathJax.Extension.mml2jax]);
MathJax.Ajax.loadComplete("[MathJax]/extensions/mml2jax.js");