96 lines
3.9 KiB
JavaScript
96 lines
3.9 KiB
JavaScript
/*************************************************************
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*
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* MathJax/extensions/jsMath2jax.js
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*
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* Implements a jsMath to Jax preprocessor that locates jsMath-style
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* <SPAN CLASS="math">...</SPAN> and <DIV CLASS="math">...</DIV> tags
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* and replaces them with SCRIPT tags for processing by MathJax.
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* (Note: use the tex2jax preprocessor to convert TeX delimiters or
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* custom delimiters to MathJax SCRIPT tags. This preprocessor is
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* only for the SPAN and DIV form of jsMath delimiters).
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*
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* To use this preprocessor, include "jsMath2jax.js" in the extensions
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* array in your config/MathJax.js file, or the MathJax.Hub.Config() call
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* in your HTML document.
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*
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* ---------------------------------------------------------------------
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*
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* Copyright (c) 2010-2012 Design Science, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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MathJax.Extension.jsMath2jax = {
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version: "2.0",
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config: {
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preview: "TeX" // Set to "none" to prevent preview strings from being inserted
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// or to an array that specifies an HTML snippet to use for
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// the preview.
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},
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PreProcess: function (element) {
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if (!this.configured) {
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this.config = MathJax.Hub.CombineConfig("jsMath2jax",this.config);
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if (this.config.Augment) {MathJax.Hub.Insert(this,this.config.Augment)}
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if (typeof(this.config.previewTeX) !== "undefined" && !this.config.previewTeX)
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{this.config.preview = "none"} // backward compatibility for previewTeX parameter
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this.previewClass = MathJax.Hub.config.preRemoveClass;
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this.configured = true;
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}
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if (typeof(element) === "string") {element = document.getElementById(element)}
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if (!element) {element = document.body}
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var span = element.getElementsByTagName("span"), i;
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for (i = span.length-1; i >= 0; i--)
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{if (String(span[i].className).match(/(^| )math( |$)/)) {this.ConvertMath(span[i],"")}}
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var div = element.getElementsByTagName("div");
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for (i = div.length-1; i >= 0; i--)
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{if (String(div[i].className).match(/(^| )math( |$)/)) {this.ConvertMath(div[i],"; mode=display")}}
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},
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ConvertMath: function (node,mode) {
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if (node.getElementsByTagName("script").length === 0) {
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var parent = node.parentNode,
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script = this.createMathTag(mode,node.innerHTML);
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if (node.nextSibling) {parent.insertBefore(script,node.nextSibling)}
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else {parent.appendChild(script)}
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if (this.config.preview !== "none") {this.createPreview(node)}
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parent.removeChild(node);
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}
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},
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createPreview: function (node) {
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var preview;
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if (this.config.preview === "TeX") {preview = [this.filterPreview(node.innerHTML)]}
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else if (this.config.preview instanceof Array) {preview = this.config.preview}
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if (preview) {
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preview = MathJax.HTML.Element("span",{className: MathJax.Hub.config.preRemoveClass},preview);
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node.parentNode.insertBefore(preview,node);
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}
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},
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createMathTag: function (mode,tex) {
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tex = tex.replace(/</g,"<").replace(/>/g,">").replace(/&/g,"&");
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var script = document.createElement("script");
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script.type = "math/tex" + mode;
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MathJax.HTML.setScript(script,tex);
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return script;
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},
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filterPreview: function (tex) {return tex}
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};
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MathJax.Hub.Register.PreProcessor(["PreProcess",MathJax.Extension.jsMath2jax]);
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MathJax.Ajax.loadComplete("[MathJax]/extensions/jsMath2jax.js");
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