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// @license magnet:?xt=urn:btih:8e4f440f4c65981c5bf93c76d35135ba5064d8b7&dn=apache-2.0.txt Apache-2.0
/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/*************************************************************
*
* MathJax/extensions/toMathML.js
*
* Implements a toMathML() method for the mml Element Jax that returns
* a MathML string from a given math expression.
*
* ---------------------------------------------------------------------
*
* Copyright (c) 2010-2020 The MathJax Consortium
*
* 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.Hub.Register.LoadHook("[MathJax]/jax/element/mml/jax.js",function () {
var VERSION = "2.7.9";
var MML = MathJax.ElementJax.mml,
SETTINGS = MathJax.Hub.config.menuSettings;
MML.mbase.Augment({
toMathML: function (space) {
var inferred = (this.inferred && this.parent.inferRow);
if (space == null) {space = ""}
var tag = this.type, attr = this.toMathMLattributes();
if (tag === "mspace") {return space + "<"+tag+attr+" />"}
var data = [], SPACE = (this.isToken ? "" : space+(inferred ? "" : " "));
for (var i = 0, m = this.data.length; i < m; i++) {
if (this.data[i]) {data.push(this.data[i].toMathML(SPACE))}
else if (!this.isToken && !this.isChars) {data.push(SPACE+"<mrow />")}
}
if (this.isToken || this.isChars) {return space + "<"+tag+attr+">"+data.join("")+"</"+tag+">"}
if (inferred) {return data.join("\n")}
if (data.length === 0 || (data.length === 1 && data[0] === ""))
{return space + "<"+tag+attr+" />"}
return space + "<"+tag+attr+">\n"+data.join("\n")+"\n"+ space +"</"+tag+">";
},
toMathMLattributes: function () {
var defaults = (this.type === "mstyle" ? MML.math.prototype.defaults : this.defaults);
var names = (this.attrNames||MML.copyAttributeNames),
skip = MML.skipAttributes, copy = MML.copyAttributes;
var attr = [];
if (this.type === "math" && (!this.attr || !('xmlns' in this.attr)))
{attr.push('xmlns="http://www.w3.org/1998/Math/MathML"')}
if (!this.attrNames) {
for (var id in defaults) {if (!skip[id] && !copy[id] && defaults.hasOwnProperty(id)) {
if (this[id] != null && this[id] !== defaults[id]) {
if (this.Get(id,null,1) !== this[id])
attr.push(id+'="'+this.toMathMLattribute(this[id])+'"');
}
}}
}
for (var i = 0, m = names.length; i < m; i++) {
if (copy[names[i]] === 1 && !defaults.hasOwnProperty(names[i])) continue;
value = (this.attr||{})[names[i]]; if (value == null) {value = this[names[i]]}
if (value != null) {attr.push(names[i]+'="'+this.toMathMLquote(value)+'"')}
}
this.toMathMLclass(attr);
if (attr.length) {return " "+attr.join(" ")} else {return ""}
},
toMathMLclass: function (attr) {
var CLASS = []; if (this["class"]) {CLASS.push(this["class"])}
if (this.isa(MML.TeXAtom) && SETTINGS.texHints) {
var TEXCLASS = ["ORD","OP","BIN","REL","OPEN","CLOSE","PUNCT","INNER","VCENTER"][this.texClass];
if (TEXCLASS) {
CLASS.push("MJX-TeXAtom-"+TEXCLASS)
if (TEXCLASS === "OP" && !this.movablelimits) CLASS.push("MJX-fixedlimits");
}
}
if (this.mathvariant && this.toMathMLvariants[this.mathvariant])
{CLASS.push("MJX"+this.mathvariant)}
if (this.variantForm) {CLASS.push("MJX-variant")}
if (CLASS.length) {attr.unshift('class="'+this.toMathMLquote(CLASS.join(" "))+'"')}
},
toMathMLattribute: function (value) {
if (typeof(value) === "string" &&
value.replace(/ /g,"").match(/^(([-+])?(\d+(\.\d*)?|\.\d+))mu$/)) {
// FIXME: should take scriptlevel into account
return (RegExp.$2||"")+((1/18)*RegExp.$3).toFixed(3).replace(/\.?0+$/,"")+"em";
}
else if (this.toMathMLvariants[value]) {return this.toMathMLvariants[value]}
return this.toMathMLquote(value);
},
toMathMLvariants: {
"-tex-caligraphic": MML.VARIANT.SCRIPT,
"-tex-caligraphic-bold": MML.VARIANT.BOLDSCRIPT,
"-tex-oldstyle": MML.VARIANT.NORMAL,
"-tex-oldstyle-bold": MML.VARIANT.BOLD,
"-tex-mathit": MML.VARIANT.ITALIC
},
toMathMLquote: function (string) {
string = String(string).split("");
for (var i = 0, m = string.length; i < m; i++) {
var n = string[i].charCodeAt(0);
if (n <= 0xD7FF || 0xE000 <= n) {
// Code points U+0000 to U+D7FF and U+E000 to U+FFFF.
// They are directly represented by n.
if (n > 0x7E || (n < 0x20 && n !== 0x0A && n !== 0x0D && n !== 0x09)) {
string[i] = "&#x"+n.toString(16).toUpperCase()+";";
} else {
var c =
{'&':'&', '<':'<', '>':'>', '"':'"'}[string[i]];
if (c) {string[i] = c}
}
} else if (i+1 < m) {
// Code points U+10000 to U+10FFFF.
// n is the lead surrogate, let's read the trail surrogate.
var trailSurrogate = string[i+1].charCodeAt(0);
var codePoint = (((n-0xD800)<<10)+(trailSurrogate-0xDC00)+0x10000);
string[i] = "&#x"+codePoint.toString(16).toUpperCase()+";";
string[i+1] = "";
i++;
} else {
// n is a lead surrogate without corresponding trail surrogate:
// remove that character.
string[i] = "";
}
}
return string.join("");
}
});
//
// Override math.toMathML in order to add semantics tag
// for the input format, if the user requests that in the
// Show As menu.
//
MML.math.Augment({
toMathML: function (space,jax) {
var annotation;
if (space == null) {space = ""}
if (jax && jax.originalText && SETTINGS.semantics)
{annotation = MathJax.InputJax[jax.inputJax].annotationEncoding}
var nested = (this.data[0] && this.data[0].data.length > 1);
var tag = this.type, attr = this.toMathMLattributes();
var data = [], SPACE = space + (annotation ? " " + (nested ? " " : "") : "") + " ";
for (var i = 0, m = this.data.length; i < m; i++) {
if (this.data[i]) {data.push(this.data[i].toMathML(SPACE))}
else {data.push(SPACE+"<mrow />")}
}
if (data.length === 0 || (data.length === 1 && data[0] === "")) {
if (!annotation) {return "<"+tag+attr+" />"}
data.push(SPACE+"<mrow />");
}
if (annotation) {
if (nested) {data.unshift(space+" <mrow>"); data.push(space+" </mrow>")}
data.unshift(space+" <semantics>");
var xmlEscapedTex = jax.originalText.replace(/[&<>]/g, function(item) {
return { '>': '>', '<': '<','&': '&' }[item]
});
data.push(space+' <annotation encoding="'+this.toMathMLquote(annotation)+'">'+xmlEscapedTex+"</annotation>");
data.push(space+" </semantics>");
}
return space+"<"+tag+attr+">\n"+data.join("\n")+"\n"+space+"</"+tag+">";
}
});
MML.msubsup.Augment({
toMathML: function (space) {
var tag = this.type;
if (this.data[this.sup] == null) {tag = "msub"}
if (this.data[this.sub] == null) {tag = "msup"}
var attr = this.toMathMLattributes();
delete this.data[0].inferred;
var data = [];
for (var i = 0, m = this.data.length; i < m; i++)
{if (this.data[i]) {data.push(this.data[i].toMathML(space+" "))}}
return space + "<"+tag+attr+">\n" + data.join("\n") + "\n" + space + "</"+tag+">";
}
});
MML.munderover.Augment({
toMathML: function (space) {
var tag = this.type;
var base = this.data[this.base];
if (base && base.isa(MML.TeXAtom) && base.movablelimits && !base.Get("displaystyle")) {
type = "msubsup";
if (this.data[this.under] == null) {tag = "msup"}
if (this.data[this.over] == null) {tag = "msub"}
} else {
if (this.data[this.under] == null) {tag = "mover"}
if (this.data[this.over] == null) {tag = "munder"}
}
var attr = this.toMathMLattributes();
delete this.data[0].inferred;
var data = [];
for (var i = 0, m = this.data.length; i < m; i++)
{if (this.data[i]) {data.push(this.data[i].toMathML(space+" "))}}
return space + "<"+tag+attr+">\n" + data.join("\n") + "\n" + space + "</"+tag+">";
}
});
MML.TeXAtom.Augment({
toMathML: function (space) {
// FIXME: Handle spacing using mpadded?
var attr = this.toMathMLattributes();
if (!attr && this.data[0].data.length === 1) {return space.substr(2) + this.data[0].toMathML(space)}
return space+"<mrow"+attr+">\n" + this.data[0].toMathML(space+" ")+"\n"+space+"</mrow>";
}
});
MML.chars.Augment({
toMathML: function (space) {return (space||"") + this.toMathMLquote(this.toString())}
});
MML.entity.Augment({
toMathML: function (space) {return (space||"") + "&"+this.toMathMLquote(this.data[0])+";<!-- "+this.toString()+" -->"}
});
MML.xml.Augment({
toMathML: function (space) {return (space||"") + this.toString()}
});
MathJax.Hub.Register.StartupHook("TeX mathchoice Ready",function () {
MML.TeXmathchoice.Augment({
toMathML: function (space) {return this.Core().toMathML(space)}
});
});
MathJax.Hub.Startup.signal.Post("toMathML Ready");
});
MathJax.Ajax.loadComplete("[MathJax]/extensions/toMathML.js");
// @license-end
|
