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1 define(
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2 [],
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3 function() {
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4 var map = {
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5 "\\{" : "&curlopen;",
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6 "\\}" : "&curlclose;",
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7 "&" : "&",
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8 "\\:" : ":"
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9 };
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10
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11 var rev = {
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12 curlopen : "{",
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13 curlclose : "}",
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14 amp : "&",
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15 colon : ":"
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16 };
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17
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18 var espaceString = function(s) {
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19 if (!s)
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20 return s;
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21 return "'" + s.replace(/('|\\)/g, "\\$1") + "'";
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22 };
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23
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24 var encode = function(s) {
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25 if (!s)
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26 return s;
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27 return s.replace(/\\{|\\}|&|\\:/g, function(m) {
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28 return map[m] || m;
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29 });
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30 };
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31
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32 var decode = function(s) {
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33 if (!s)
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34 return s;
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35 return s.replace(/&(\w+);/g, function(m, $1) {
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36 return rev[$1] || m;
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37 });
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38 };
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39
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40 var subst = function(s) {
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41 var i = s.indexOf(":"), name, pattern;
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42 if (i >= 0) {
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43 name = s.substr(0, i);
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44 pattern = s.substr(i + 1);
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45 } else {
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46 name = s;
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47 }
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48
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49 if (pattern)
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50 return [
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51 espaceString(decode(name)),
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52 espaceString(decode(pattern)) ];
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53 else
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54 return [ espaceString(decode(name)) ];
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55 };
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56
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57 var compile = function(str) {
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58 if (!str)
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59 return function() {};
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60
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61 var chunks = encode(str).split("{"), chunk;
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62
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63 var code = [ "var result=[];" ];
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64
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65 for (var i = 0; i < chunks.length; i++) {
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66 chunk = chunks[i];
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67
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68 if (i === 0) {
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69 if (chunk)
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70 code.push("result.push(" + espaceString(decode(chunk)) +
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71 ");");
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72 } else {
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73 var len = chunk.indexOf("}");
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74 if (len < 0)
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75 throw new Error("Unbalanced substitution #" + i);
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76
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77 code.push("result.push(subst(" +
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78 subst(chunk.substr(0, len)).join(",") + "));");
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79 if (chunk.length > len + 1)
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80 code.push("result.push(" +
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81 espaceString(decode(chunk.substr(len + 1))) + ");");
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82 }
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83 }
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84
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85 code.push("return result.join('');");
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86
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87 /* jshint -W054 */
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88 return new Function("subst", code.join("\n"));
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89 };
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90
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91 var cache = {};
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92
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93 return function(template) {
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94 var compiled = cache[template];
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95 if (!compiled) {
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96 compiled = compile(template);
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97 cache[template] = compiled;
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98 }
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99 return compiled;
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100 };
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101 }); |
