1 files changed, 73 insertions, 0 deletions
diff --git a/node_modules/entities/lib/encode.js b/node_modules/entities/lib/encode.js
new file mode 100644
index 000000000..10c0c36e2
--- /dev/null
+++ b/node_modules/entities/lib/encode.js
@@ -0,0 +1,73 @@
+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){
+	var single = [],
+	    multiple = [];
+
+	Object.keys(inverse).forEach(function(k){
+		if(k.length === 1){
+			single.push("\\" + k);
+		} else {
+			multiple.push(k);
+		}
+	});
+
+	//TODO add ranges
+	multiple.unshift("[" + single.join("") + "]");
+
+	return new RegExp(multiple.join("|"), "g");
+}
+
+var re_nonASCII = /[^\0-\x7F]/g,
+    re_astralSymbols = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g;
+
+function singleCharReplacer(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, singleCharReplacer);
+	};
+}
+
+var re_xmlChars = getInverseReplacer(inverseXML);
+
+function escapeXML(data){
+	return data
+			.replace(re_xmlChars, singleCharReplacer)
+			.replace(re_astralSymbols, astralReplacer)
+			.replace(re_nonASCII, singleCharReplacer);
+}
+
+exports.escape = escapeXML;