review.tizen.org Git - platform/framework/web/crosswalk-tizen.git/blob

   1 /*! http://mths.be/endswith v0.2.0 by @mathias */
   2 if (!String.prototype.endsWith) {
   3         (function() {
   4                 'use strict'; // needed to support `apply`/`call` with `undefined`/`null`
   5                 var defineProperty = (function() {
   6                         // IE 8 only supports `Object.defineProperty` on DOM elements
   7                         try {
   8                                 var object = {};
   9                                 var $defineProperty = Object.defineProperty;
  10                                 var result = $defineProperty(object, object, object) && $defineProperty;
  11                         } catch(error) {}
  12                         return result;
  13                 }());
  14                 var toString = {}.toString;
  15                 var endsWith = function(search) {
  16                         if (this == null) {
  17                                 throw TypeError();
  18                         }
  19                         var string = String(this);
  20                         if (search && toString.call(search) == '[object RegExp]') {
  21                                 throw TypeError();
  22                         }
  23                         var stringLength = string.length;
  24                         var searchString = String(search);
  25                         var searchLength = searchString.length;
  26                         var pos = stringLength;
  27                         if (arguments.length > 1) {
  28                                 var position = arguments[1];
  29                                 if (position !== undefined) {
  30                                         // `ToInteger`
  31                                         pos = position ? Number(position) : 0;
  32                                         if (pos != pos) { // better `isNaN`
  33                                                 pos = 0;
  34                                         }
  35                                 }
  36                         }
  37                         var end = Math.min(Math.max(pos, 0), stringLength);
  38                         var start = end - searchLength;
  39                         if (start < 0) {
  40                                 return false;
  41                         }
  42                         var index = -1;
  43                         while (++index < searchLength) {
  44                                 if (string.charCodeAt(start + index) != searchString.charCodeAt(index)) {
  45                                         return false;
  46                                 }
  47                         }
  48                         return true;
  49                 };
  50                 if (defineProperty) {
  51                         defineProperty(String.prototype, 'endsWith', {
  52                                 'value': endsWith,
  53                                 'configurable': true,
  54                                 'writable': true
  55                         });
  56                 } else {
  57                         String.prototype.endsWith = endsWith;
  58                 }
  59         }());
  60 }