format-compile.js
100 lines
| 2.8 KiB
| application/javascript
|
JavascriptLexer
cin
|
r51 | define( | |
| [], | |||
| function() { | |||
| var map = { | |||
| "\\{" : "&curlopen;", | |||
| "\\}" : "&curlclose;", | |||
| "&" : "&", | |||
| "\\:" : ":" | |||
| }; | |||
| var rev = { | |||
| curlopen : "{", | |||
| curlclose : "}", | |||
| amp : "&", | |||
| colon : ":" | |||
| }; | |||
| var espaceString = function(s) { | |||
| if (!s) | |||
| return s; | |||
| return "'" + s.replace(/('|\\)/g, "\\$1").replace("\n","\\n") + "'"; | |||
| }; | |||
| var encode = function(s) { | |||
| if (!s) | |||
| return s; | |||
| return s.replace(/\\{|\\}|&|\\:|\n/g, function(m) { | |||
| return map[m] || m; | |||
| }); | |||
| }; | |||
| var decode = function(s) { | |||
| if (!s) | |||
| return s; | |||
| return s.replace(/&(\w+);/g, function(m, $1) { | |||
| return rev[$1] || m; | |||
| }); | |||
| }; | |||
| var subst = function(s) { | |||
| var i = s.indexOf(":"), name, pattern; | |||
| if (i >= 0) { | |||
| name = s.substr(0, i); | |||
| pattern = s.substr(i + 1); | |||
| } else { | |||
| name = s; | |||
| } | |||
| if (pattern) | |||
| return [ | |||
| espaceString(decode(name)), | |||
| espaceString(decode(pattern)) ]; | |||
| else | |||
| return [ espaceString(decode(name)) ]; | |||
| }; | |||
| var compile = function(str) { | |||
| if (!str) | |||
| return function() {}; | |||
| var chunks = encode(str).split("{"), chunk; | |||
| var code = [ "var result=[];" ]; | |||
| for (var i = 0; i < chunks.length; i++) { | |||
| chunk = chunks[i]; | |||
| if (i === 0) { | |||
| if (chunk) | |||
| code.push("result.push(" + espaceString(decode(chunk)) + | |||
| ");"); | |||
| } else { | |||
| var len = chunk.indexOf("}"); | |||
| if (len < 0) | |||
| throw new Error("Unbalanced substitution #" + i); | |||
| code.push("result.push(subst(" + | |||
| subst(chunk.substr(0, len)).join(",") + "));"); | |||
| if (chunk.length > len + 1) | |||
| code.push("result.push(" + | |||
| espaceString(decode(chunk.substr(len + 1))) + ");"); | |||
| } | |||
| } | |||
| code.push("return result.join('');"); | |||
| /* jshint -W054 */ | |||
| return new Function("subst", code.join("\n")); | |||
| }; | |||
| var cache = {}; | |||
| return function(template) { | |||
| var compiled = cache[template]; | |||
| if (!compiled) { | |||
| compiled = compile(template); | |||
| cache[template] = compiled; | |||
| } | |||
| return compiled; | |||
| }; | |||
| }); |