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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/TeX/newcommand.js
*
* Implements the \newcommand, \newenvironment and \def
* macros, and is loaded automatically when needed.
*
* ---------------------------------------------------------------------
*
* Copyright (c) 2009-2020 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.Extension["TeX/newcommand"] = {
version: "2.7.9"
};
MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
var TEX = MathJax.InputJax.TeX;
var TEXDEF = TEX.Definitions;
TEXDEF.Add({
macros: {
newcommand: 'NewCommand',
renewcommand: 'NewCommand',
newenvironment: 'NewEnvironment',
renewenvironment: 'NewEnvironment',
def: 'MacroDef',
'let': 'Let'
}
},null,true);
TEX.Parse.Augment({
/*
* Implement \newcommand{\name}[n][default]{...}
*/
NewCommand: function (name) {
var cs = this.trimSpaces(this.GetArgument(name)),
n = this.GetBrackets(name),
opt = this.GetBrackets(name),
def = this.GetArgument(name);
if (cs.charAt(0) === "\\") {cs = cs.substr(1)}
if (!cs.match(/^(.|[a-z]+)$/i)) {
TEX.Error(["IllegalControlSequenceName",
"Illegal control sequence name for %1",name]);
}
if (n) {
n = this.trimSpaces(n);
if (!n.match(/^[0-9]+$/)) {
TEX.Error(["IllegalParamNumber",
"Illegal number of parameters specified in %1",name]);
}
}
this.setDef(cs,['Macro',def,n,opt]);
},
/*
* Implement \newenvironment{name}[n][default]{begincmd}{endcmd}
*/
NewEnvironment: function (name) {
var env = this.trimSpaces(this.GetArgument(name)),
n = this.GetBrackets(name),
opt = this.GetBrackets(name),
bdef = this.GetArgument(name),
edef = this.GetArgument(name);
if (n) {
n = this.trimSpaces(n);
if (!n.match(/^[0-9]+$/)) {
TEX.Error(["IllegalParamNumber",
"Illegal number of parameters specified in %1",name]);
}
}
this.setEnv(env,['BeginEnv',[null,'EndEnv'],bdef,edef,n,opt]);
},
/*
* Implement \def command
*/
MacroDef: function (name) {
var cs = this.GetCSname(name),
params = this.GetTemplate(name,"\\"+cs),
def = this.GetArgument(name);
if (!(params instanceof Array)) {this.setDef(cs,['Macro',def,params])}
else {this.setDef(cs,['MacroWithTemplate',def].concat(params))}
},
/*
* Implements the \let command
*/
Let: function (name) {
var cs = this.GetCSname(name), macro;
var c = this.GetNext(); if (c === "=") {this.i++; c = this.GetNext()}
//
// All \let commands create entries in the macros array, but we
// have to look in the various mathchar and delimiter arrays if
// the source isn't a macro already, and attach the data to a
// macro with the proper routine to process it.
//
// A command of the form \let\cs=char produces a macro equivalent
// to \def\cs{char}, which is as close as MathJax can get for this.
// So \let\bgroup={ is possible, but doesn't work as it does in TeX.
//
if (c === "\\") {
name = this.GetCSname(name);
macro = this.csFindMacro(name);
if (!macro) {
if (TEXDEF.mathchar0mi.hasOwnProperty(name)) {macro = ["csMathchar0mi",TEXDEF.mathchar0mi[name]]} else
if (TEXDEF.mathchar0mo.hasOwnProperty(name)) {macro = ["csMathchar0mo",TEXDEF.mathchar0mo[name]]} else
if (TEXDEF.mathchar7.hasOwnProperty(name)) {macro = ["csMathchar7",TEXDEF.mathchar7[name]]} else
if (TEXDEF.delimiter.hasOwnProperty("\\"+name)) {macro = ["csDelimiter",TEXDEF.delimiter["\\"+name]]} else
return;
}
} else {macro = ["Macro",c]; this.i++}
this.setDef(cs,macro);
},
/*
* Get a CS name or give an error
*/
GetCSname: function (cmd) {
var c = this.GetNext();
if (c !== "\\") {
TEX.Error(["MissingCS",
"%1 must be followed by a control sequence", cmd])
}
var cs = this.trimSpaces(this.GetArgument(cmd));
return cs.substr(1);
},
/*
* Get a \def parameter template
*/
GetTemplate: function (cmd,cs) {
var c, params = [], n = 0;
c = this.GetNext(); var i = this.i;
while (this.i < this.string.length) {
c = this.GetNext();
if (c === '#') {
if (i !== this.i) {params[n] = this.string.substr(i,this.i-i)}
c = this.string.charAt(++this.i);
if (!c.match(/^[1-9]$/)) {
TEX.Error(["CantUseHash2",
"Illegal use of # in template for %1",cs]);
}
if (parseInt(c) != ++n) {
TEX.Error(["SequentialParam",
"Parameters for %1 must be numbered sequentially",cs]);
}
i = this.i+1;
} else if (c === '{') {
if (i !== this.i) {params[n] = this.string.substr(i,this.i-i)}
if (params.length > 0) {return [n,params]} else {return n}
}
this.i++;
}
TEX.Error(["MissingReplacementString",
"Missing replacement string for definition of %1",cmd]);
},
/*
* Process a macro with a parameter template
*/
MacroWithTemplate: function (name,text,n,params) {
if (n) {
var args = []; this.GetNext();
if (params[0] && !this.MatchParam(params[0])) {
TEX.Error(["MismatchUseDef",
"Use of %1 doesn't match its definition",name]);
}
for (var i = 0; i < n; i++) {args.push(this.GetParameter(name,params[i+1]))}
text = this.SubstituteArgs(args,text);
}
this.string = this.AddArgs(text,this.string.slice(this.i));
this.i = 0;
if (++this.macroCount > TEX.config.MAXMACROS) {
TEX.Error(["MaxMacroSub1",
"MathJax maximum macro substitution count exceeded; " +
"is there a recursive macro call?"]);
}
},
/*
* Process a user-defined environment
*/
BeginEnv: function (begin,bdef,edef,n,def) {
if (n) {
var args = [];
if (def != null) {
var optional = this.GetBrackets("\\begin{"+name+"}");
args.push(optional == null ? def : optional);
}
for (var i = args.length; i < n; i++) {args.push(this.GetArgument("\\begin{"+name+"}"))}
bdef = this.SubstituteArgs(args,bdef);
edef = this.SubstituteArgs([],edef); // no args, but get errors for #n in edef
}
this.string = this.AddArgs(bdef,this.string.slice(this.i)); this.i = 0;
return begin;
},
EndEnv: function (begin,bdef,edef,n) {
var end = "\\end{\\end\\"+begin.name+"}"; // special version of \end for after edef
this.string = this.AddArgs(edef,end+this.string.slice(this.i)); this.i = 0;
return null;
},
/*
* Find a single parameter delimited by a trailing template
*/
GetParameter: function (name,param) {
if (param == null) {return this.GetArgument(name)}
var i = this.i, j = 0, hasBraces = 0;
while (this.i < this.string.length) {
var c = this.string.charAt(this.i);
if (c === '{') {
if (this.i === i) {hasBraces = 1}
this.GetArgument(name); j = this.i - i;
} else if (this.MatchParam(param)) {
if (hasBraces) {i++; j -= 2}
return this.string.substr(i,j);
} else if (c === "\\") {
this.i++; j++; hasBraces = 0;
var match = this.string.substr(this.i).match(/[a-z]+|./i);
if (match) {this.i += match[0].length; j = this.i - i}
} else {
this.i++; j++; hasBraces = 0;
}
}
TEX.Error(["RunawayArgument","Runaway argument for %1?",name]);
},
/*
* Check if a template is at the current location.
* (The match must be exact, with no spacing differences. TeX is
* a little more forgiving than this about spaces after macro names)
*/
MatchParam: function (param) {
if (this.string.substr(this.i,param.length) !== param) {return 0}
if (param.match(/\\[a-z]+$/i) &&
this.string.charAt(this.i+param.length).match(/[a-z]/i)) {return 0}
this.i += param.length;
return 1;
}
});
TEX.Environment = function (name) {
TEXDEF.environment[name] = ['BeginEnv',[null,'EndEnv']].concat([].slice.call(arguments,1));
TEXDEF.environment[name].isUser = true;
}
MathJax.Hub.Startup.signal.Post("TeX newcommand Ready");
});
MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/newcommand.js");
// @license-end
|
