199 lines
7.8 KiB
JavaScript
199 lines
7.8 KiB
JavaScript
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/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/*************************************************************
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*
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* MathJax/extensions/toMathML.js
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*
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* Implements a toMathML() method for the mml Element Jax that returns
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* a MathML string from a given math expression.
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*
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* ---------------------------------------------------------------------
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*
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* Copyright (c) 2010-2013 The MathJax Consortium
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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.Hub.Register.LoadHook("[MathJax]/jax/element/mml/jax.js",function () {
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var VERSION = "2.3";
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var MML = MathJax.ElementJax.mml
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SETTINGS = MathJax.Hub.config.menuSettings;
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MML.mbase.Augment({
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toMathML: function (space) {
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var inferred = (this.inferred && this.parent.inferRow);
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if (space == null) {space = ""}
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var tag = this.type, attr = this.toMathMLattributes();
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if (tag === "mspace") {return space + "<"+tag+attr+" />"}
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var data = []; var SPACE = (this.isToken ? "" : space+(inferred ? "" : " "));
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for (var i = 0, m = this.data.length; i < m; i++) {
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if (this.data[i]) {data.push(this.data[i].toMathML(SPACE))}
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else if (!this.isToken) {data.push(SPACE+"<mrow />")}
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}
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if (this.isToken) {return space + "<"+tag+attr+">"+data.join("")+"</"+tag+">"}
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if (inferred) {return data.join("\n")}
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if (data.length === 0 || (data.length === 1 && data[0] === ""))
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{return space + "<"+tag+attr+" />"}
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return space + "<"+tag+attr+">\n"+data.join("\n")+"\n"+ space +"</"+tag+">";
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},
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toMathMLattributes: function () {
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var attr = [], defaults = this.defaults;
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var copy = (this.attrNames||MML.copyAttributeNames), skip = MML.skipAttributes;
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if (this.type === "math" && (!this.attr || !this.attr.xmlns))
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{attr.push('xmlns="http://www.w3.org/1998/Math/MathML"')}
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if (!this.attrNames) {
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if (this.type === "mstyle") {defaults = MML.math.prototype.defaults}
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for (var id in defaults) {if (!skip[id] && defaults.hasOwnProperty(id)) {
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var force = (id === "open" || id === "close");
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if (this[id] != null && (force || this[id] !== defaults[id])) {
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var value = this[id]; delete this[id];
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if (force || this.Get(id) !== value)
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{attr.push(id+'="'+this.toMathMLattribute(value)+'"')}
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this[id] = value;
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}
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}}
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}
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for (var i = 0, m = copy.length; i < m; i++) {
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if (copy[i] === "class") continue; // this is handled separately below
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value = (this.attr||{})[copy[i]]; if (value == null) {value = this[copy[i]]}
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if (value != null) {attr.push(copy[i]+'="'+this.toMathMLquote(value)+'"')}
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}
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this.toMathMLclass(attr);
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if (attr.length) {return " "+attr.join(" ")} else {return ""}
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},
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toMathMLclass: function (attr) {
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var CLASS = []; if (this["class"]) {CLASS.push(this["class"])}
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if (this.isa(MML.TeXAtom) && SETTINGS.texHints) {
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var TEXCLASS = ["ORD","OP","BIN","REL","OPEN","CLOSE","PUNCT","INNER","VCENTER"][this.texClass];
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if (TEXCLASS) {CLASS.push("MJX-TeXAtom-"+TEXCLASS)}
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}
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if (this.mathvariant && this.toMathMLvariants[this.mathvariant])
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{CLASS.push("MJX"+this.mathvariant)}
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if (this.variantForm) {CLASS.push("MJX-variant")}
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if (CLASS.length) {attr.unshift('class="'+CLASS.join(" ")+'"')}
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},
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toMathMLattribute: function (value) {
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if (typeof(value) === "string" &&
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value.replace(/ /g,"").match(/^(([-+])?(\d+(\.\d*)?|\.\d+))mu$/)) {
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// FIXME: should take scriptlevel into account
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return RegExp.$2+((1/18)*RegExp.$3).toFixed(3).replace(/\.?0+$/,"")+"em";
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}
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else if (this.toMathMLvariants[value]) {return this.toMathMLvariants[value]}
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return this.toMathMLquote(value);
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},
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toMathMLvariants: {
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"-tex-caligraphic": MML.VARIANT.SCRIPT,
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"-tex-caligraphic-bold": MML.VARIANT.BOLDSCRIPT,
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"-tex-oldstyle": MML.VARIANT.NORMAL,
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"-tex-oldstyle-bold": MML.VARIANT.BOLD,
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"-tex-mathit": MML.VARIANT.ITALIC
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},
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toMathMLquote: function (string) {
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string = String(string).split("");
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for (var i = 0, m = string.length; i < m; i++) {
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var n = string[i].charCodeAt(0);
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if (n <= 0xD7FF || 0xE000 <= n) {
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// Code points U+0000 to U+D7FF and U+E000 to U+FFFF.
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// They are directly represented by n.
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if (n < 0x20 || n > 0x7E) {
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string[i] = "&#x"+n.toString(16).toUpperCase()+";";
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} else {
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var c =
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{'&':'&', '<':'<', '>':'>', '"':'"'}[string[i]];
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if (c) {string[i] = c}
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}
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} else if (i+1 < m) {
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// Code points U+10000 to U+10FFFF.
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// n is the lead surrogate, let's read the trail surrogate.
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var trailSurrogate = string[i+1].charCodeAt(0);
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var codePoint = (((n-0xD800)<<10)+(trailSurrogate-0xDC00)+0x10000);
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string[i] = "&#x"+codePoint.toString(16).toUpperCase()+";";
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string[i+1] = "";
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i++;
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} else {
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// n is a lead surrogate without corresponding trail surrogate:
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// remove that character.
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string[i] = "";
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}
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}
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return string.join("");
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}
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});
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MML.msubsup.Augment({
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toMathML: function (space) {
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var tag = this.type;
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if (this.data[this.sup] == null) {tag = "msub"}
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if (this.data[this.sub] == null) {tag = "msup"}
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var attr = this.toMathMLattributes();
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delete this.data[0].inferred;
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var data = [];
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for (var i = 0, m = this.data.length; i < m; i++)
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{if (this.data[i]) {data.push(this.data[i].toMathML(space+" "))}}
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return space + "<"+tag+attr+">\n" + data.join("\n") + "\n" + space + "</"+tag+">";
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}
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});
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MML.munderover.Augment({
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toMathML: function (space) {
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var tag = this.type;
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if (this.data[this.under] == null) {tag = "mover"}
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if (this.data[this.over] == null) {tag = "munder"}
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var attr = this.toMathMLattributes();
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delete this.data[0].inferred;
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var data = [];
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for (var i = 0, m = this.data.length; i < m; i++)
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{if (this.data[i]) {data.push(this.data[i].toMathML(space+" "))}}
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return space + "<"+tag+attr+">\n" + data.join("\n") + "\n" + space + "</"+tag+">";
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}
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});
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MML.TeXAtom.Augment({
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toMathML: function (space) {
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// FIXME: Handle spacing using mpadded?
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var attr = this.toMathMLattributes();
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if (!attr && this.data[0].data.length === 1) {return space.substr(2) + this.data[0].toMathML(space)}
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return space+"<mrow"+attr+">\n" + this.data[0].toMathML(space+" ")+"\n"+space+"</mrow>";
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}
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});
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MML.chars.Augment({
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toMathML: function (space) {return (space||"") + this.toMathMLquote(this.toString())}
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});
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MML.entity.Augment({
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toMathML: function (space) {return (space||"") + "&"+this.data[0]+";<!-- "+this.toString()+" -->"}
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});
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MML.xml.Augment({
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toMathML: function (space) {return (space||"") + this.toString()}
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});
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MathJax.Hub.Register.StartupHook("TeX mathchoice Ready",function () {
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MML.TeXmathchoice.Augment({
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toMathML: function (space) {return this.Core().toMathML(space)}
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});
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});
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MathJax.Hub.Startup.signal.Post("toMathML Ready");
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});
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MathJax.Ajax.loadComplete("[MathJax]/extensions/toMathML.js");
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