Code coverage report for sc/lang/compiler/parser/interpolate-string.js

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(function(sc) {
  "use strict";
 
  require("../compiler");
 
  function InterpolateString(str) {
    this.str = str;
  }
 
  InterpolateString.hasInterpolateString = function(str) {
    return (/(?:^|[^\\\\])#\{/).test(str);
  };
 
  InterpolateString.prototype.toCompiledString = function() {
    return toCompiledString(this.str);
  };
 
  function toCompiledString(str) {
    var len = str.length;
    var items = [];
 
    var index1 = 0;
    var code;
    do {
      var index2 = findString(str, index1);
      if (index2 >= len) {
        break;
      }
      code = str.substr(index1, index2 - index1);
      if (code) {
        items.push('"' + code + '"');
      }
 
      index1 = index2 + 2;
      index2 = findExpression(str, index1, items);
 
      code = str.substr(index1, index2 - index1);
      if (code) {
        items.push("(" + code + ").asString");
      }
 
      index1 = index2 + 1;
    } while (index1 < len);
 
    if (index1 < len) {
      items.push('"' + str.substr(index1) + '"');
    }
 
    return items.join("++");
  }
 
  function findString(str, index) {
    var len = str.length;
 
    while (index < len) {
      switch (str.charAt(index)) {
      case "#":
        if (str.charAt(index + 1) === "{") {
          return index;
        }
        break;
      case "\\":
        index += 1;
        break;
      }
      index += 1;
    }
 
    return index;
  }
 
  function findExpression(str, index) {
    var len = str.length;
 
    var depth = 0;
    while (index < len) {
      switch (str.charAt(index)) {
      case "}":
        if (depth === 0) {
          return index;
        }
        depth -= 1;
        break;
      case "{":
        depth += 1;
        break;
      }
      index += 1;
    }
 
    return index;
  }
 
  sc.lang.compiler.InterpolateString = InterpolateString;
})(sc);