git.r.bdr.sh - rbdr/dotfiles/blob

   1 // Thanks @mathiasbynens
   2 // http://mathiasbynens.be/notes/javascript-unicode#iterating-over-symbols
   3
   4 'use strict';
   5
   6 var setPrototypeOf = require('es5-ext/object/set-prototype-of')
   7   , d              = require('d')
   8   , Iterator       = require('./')
   9
  10   , defineProperty = Object.defineProperty
  11   , StringIterator;
  12
  13 StringIterator = module.exports = function (str) {
  14         if (!(this instanceof StringIterator)) return new StringIterator(str);
  15         str = String(str);
  16         Iterator.call(this, str);
  17         defineProperty(this, '__length__', d('', str.length));
  18
  19 };
  20 if (setPrototypeOf) setPrototypeOf(StringIterator, Iterator);
  21
  22 StringIterator.prototype = Object.create(Iterator.prototype, {
  23         constructor: d(StringIterator),
  24         _next: d(function () {
  25                 if (!this.__list__) return;
  26                 if (this.__nextIndex__ < this.__length__) return this.__nextIndex__++;
  27                 this._unBind();
  28         }),
  29         _resolve: d(function (i) {
  30                 var char = this.__list__[i], code;
  31                 if (this.__nextIndex__ === this.__length__) return char;
  32                 code = char.charCodeAt(0);
  33                 if ((code >= 0xD800) && (code <= 0xDBFF)) return char + this.__list__[this.__nextIndex__++];
  34                 return char;
  35         }),
  36         toString: d(function () { return '[object String Iterator]'; })
  37 });