| var inverseXML = getInverseObj(require("../maps/xml.json")), |
| xmlReplacer = getInverseReplacer(inverseXML); |
| |
| exports.XML = getInverse(inverseXML, xmlReplacer); |
| |
| var inverseHTML = getInverseObj(require("../maps/entities.json")), |
| htmlReplacer = getInverseReplacer(inverseHTML); |
| |
| exports.HTML = getInverse(inverseHTML, htmlReplacer); |
| |
| function getInverseObj(obj){ |
| return Object.keys(obj).sort().reduce(function(inverse, name){ |
| inverse[obj[name]] = "&" + name + ";"; |
| return inverse; |
| }, {}); |
| } |
| |
| function getInverseReplacer(inverse){ |
| return new RegExp("\\" + Object.keys(inverse).sort().join("|\\"), "g"); |
| } |
| |
| var re_nonASCII = /[^\0-\x7F]/g, |
| re_astralSymbols = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g; |
| |
| function nonUTF8Replacer(c){ |
| return "&#x" + c.charCodeAt(0).toString(16).toUpperCase() + ";"; |
| } |
| |
| function astralReplacer(c){ |
| // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae |
| var high = c.charCodeAt(0); |
| var low = c.charCodeAt(1); |
| var codePoint = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000; |
| return "&#x" + codePoint.toString(16).toUpperCase() + ";"; |
| } |
| |
| function getInverse(inverse, re){ |
| function func(name){ |
| return inverse[name]; |
| } |
| |
| return function(data){ |
| return data |
| .replace(re, func) |
| .replace(re_astralSymbols, astralReplacer) |
| .replace(re_nonASCII, nonUTF8Replacer); |
| }; |
| } |