/**
 * File:        clientside_validation.ie8.js
 * Version:     7.x-1.x
 * Description: ECMA-262, 5th edition support for IE <= 8
 * Language:    Javascript
 * Project:     clientside_validation
 * @module clientside_validation
 */

'use strict';

/*
 * Support for String.trim
 * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/Trim#Compatibility
 */
if(!String.prototype.trim) {
  String.prototype.trim = function () {
    return this.replace(/^\s+|\s+$/g,'');
  };
}

/*
 * Support for Array.indexOf
 * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf#Compatibility
 */
if (!Array.prototype.indexOf) {
    Array.prototype.indexOf = function (searchElement /*, fromIndex */ ) {
        "use strict";
        if (this == null) {
            throw new TypeError();
        }
        var t = Object(this);
        var len = t.length >>> 0;
        if (len === 0) {
            return -1;
        }
        var n = 0;
        if (arguments.length > 0) {
            n = Number(arguments[1]);
            if (n != n) { // shortcut for verifying if it's NaN
                n = 0;
            } else if (n != 0 && n != Infinity && n != -Infinity) {
                n = (n > 0 || -1) * Math.floor(Math.abs(n));
            }
        }
        if (n >= len) {
            return -1;
        }
        var k = n >= 0 ? n : Math.max(len - Math.abs(n), 0);
        for (; k < len; k++) {
            if (k in t && t[k] === searchElement) {
                return k;
            }
        }
        return -1;
    }
}

/*
 * Support for Array.lastIndexOf
 * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/lastIndexOf#Compatibility
 */
if (!Array.prototype.lastIndexOf)
{
  Array.prototype.lastIndexOf = function(searchElement /*, fromIndex*/)
  {
    "use strict";

    if (this == null)
      throw new TypeError();

    var t = Object(this);
    var len = t.length >>> 0;
    if (len === 0)
      return -1;

    var n = len;
    if (arguments.length > 1)
    {
      n = Number(arguments[1]);
      if (n != n)
        n = 0;
      else if (n != 0 && n != (1 / 0) && n != -(1 / 0))
        n = (n > 0 || -1) * Math.floor(Math.abs(n));
    }

    var k = n >= 0
          ? Math.min(n, len - 1)
          : len - Math.abs(n);

    for (; k >= 0; k--)
    {
      if (k in t && t[k] === searchElement)
        return k;
    }
    return -1;
  };
}

/*
 * Support for Array.filter
 * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/filter#Compatibility
 */
if (!Array.prototype.filter)
{
  Array.prototype.filter = function(fun /*, thisp */)
  {
    "use strict";

    if (this == null)
      throw new TypeError();

    var t = Object(this);
    var len = t.length >>> 0;
    if (typeof fun != "function")
      throw new TypeError();

    var res = [];
    var thisp = arguments[1];
    for (var i = 0; i < len; i++)
    {
      if (i in t)
      {
        var val = t[i]; // in case fun mutates this
        if (fun.call(thisp, val, i, t))
          res.push(val);
      }
    }

    return res;
  };
}

/*
 * Support for Array.map
 * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/map#Browser_compatibility
 */
// Production steps of ECMA-262, Edition 5, 15.4.4.19
// Reference: http://es5.github.com/#x15.4.4.19
if (!Array.prototype.map) {
  Array.prototype.map = function(callback, thisArg) {

    var T, A, k;

    if (this == null) {
      throw new TypeError(" this is null or not defined");
    }

    // 1. Let O be the result of calling ToObject passing the |this| value as the argument.
    var O = Object(this);

    // 2. Let lenValue be the result of calling the Get internal method of O with the argument "length".
    // 3. Let len be ToUint32(lenValue).
    var len = O.length >>> 0;

    // 4. If IsCallable(callback) is false, throw a TypeError exception.
    // See: http://es5.github.com/#x9.11
    if ({}.toString.call(callback) != "[object Function]") {
      throw new TypeError(callback + " is not a function");
    }

    // 5. If thisArg was supplied, let T be thisArg; else let T be undefined.
    if (thisArg) {
      T = thisArg;
    }

    // 6. Let A be a new array created as if by the expression new Array(len) where Array is
    // the standard built-in constructor with that name and len is the value of len.
    A = new Array(len);

    // 7. Let k be 0
    k = 0;

    // 8. Repeat, while k < len
    while(k < len) {

      var kValue, mappedValue;

      // a. Let Pk be ToString(k).
      //   This is implicit for LHS operands of the in operator
      // b. Let kPresent be the result of calling the HasProperty internal method of O with argument Pk.
      //   This step can be combined with c
      // c. If kPresent is true, then
      if (k in O) {

        // i. Let kValue be the result of calling the Get internal method of O with argument Pk.
        kValue = O[ k ];

        // ii. Let mappedValue be the result of calling the Call internal method of callback
        // with T as the this value and argument list containing kValue, k, and O.
        mappedValue = callback.call(T, kValue, k, O);

        // iii. Call the DefineOwnProperty internal method of A with arguments
        // Pk, Property Descriptor {Value: mappedValue, Writable: true, Enumerable: true, Configurable: true},
        // and false.

        // In browsers that support Object.defineProperty, use the following:
        // Object.defineProperty(A, Pk, { value: mappedValue, writable: true, enumerable: true, configurable: true });

        // For best browser support, use the following:
        A[ k ] = mappedValue;
      }
      // d. Increase k by 1.
      k++;
    }

    // 9. return A
    return A;
  };      
}
