dojox
Version:
Dojo eXtensions, a rollup of many useful sub-projects and varying states of maturity – from very stable and robust, to alpha and experimental. See individual projects contain README files for details.
64 lines (57 loc) • 2.09 kB
JavaScript
define(["../library/greek"], function(greeks){
// summary:
// Singleton used for converting characters and typsetting. Required by _base.
// description:
// Eventually, this is supposed to turn input strings of mathematical
// expressions into typeset expressions that can be displayed on the
// canvas. For now, we just generate Greek letters based on LaTeX style
// entity codes.
//dojox.drawing.util.typeset =
return {
convertHTML: function(inText){
if(inText){
return inText.replace(/&([^;]+);/g,function(match,code){
if(code.charAt(0)=='#'){
//coerce remainder of string to int
var number=+code.substr(1);
if(!isNaN(number)){
return String.fromCharCode(number);
}
}else if(greeks[code]){
return String.fromCharCode(greeks[code]);
}
// This is generally for server code, so there
// is no point bothering the user in the case of an error.
console.warn("no HTML conversion for ",match);
return match;
});
}
return inText;
},
convertLaTeX: function(inText){
// console.log("***** convertLaTeX for ",inText);
if(inText){
return inText.replace(/\\([a-zA-Z]+)/g,function(match,word){
if(greeks[word]){
return String.fromCharCode(greeks[word]);
}else if(word.substr(0,2)=="mu"){
// special handling for \mu since it is
// a unit prefix for micro.
return String.fromCharCode(greeks["mu"])+word.substr(2);
}else if(word.substr(0,5)=="theta"){
// special handling for \theta since it is
// a standard prefix for angle associated with a vector.
return String.fromCharCode(greeks["theta"])+word.substr(5);
}else if(word.substr(0,3)=="phi"){
// special handling for \phi since it is
// a standard prefix for angle associated with a z-axis vector.
return String.fromCharCode(greeks["phi"])+word.substr(3);
}
console.log("no match for ",match," in ",inText);
console.log("Need user-friendly error handling here!");
}).replace(/\\\\/g,'\\');
}
return inText;
}
};
});