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/**
 * JavaScript Polyfill functions for jsPDF
 * Collected from public resources by
 * https://github.com/diegocr
 */

(function (global) {
	var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';

	if (typeof global.btoa === 'undefined') {
		global.btoa = function(data) {
			//  discuss at: http://phpjs.org/functions/base64_encode/
			// original by: Tyler Akins (http://rumkin.com)
			// improved by: Bayron Guevara
			// improved by: Thunder.m
			// improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
			// improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
			// improved by: Rafal Kukawski (http://kukawski.pl)
			// bugfixed by: Pellentesque Malesuada
			//   example 1: base64_encode('Kevin van Zonneveld');
			//   returns 1: 'S2V2aW4gdmFuIFpvbm5ldmVsZA=='

			var o1,o2,o3,h1,h2,h3,h4,bits,i = 0,ac = 0,enc = '',tmp_arr = [];

			if (!data) {
				return data;
			}

			do { // pack three octets into four hexets
				o1 = data.charCodeAt(i++);
				o2 = data.charCodeAt(i++);
				o3 = data.charCodeAt(i++);

				bits = o1 << 16 | o2 << 8 | o3;

				h1 = bits >> 18 & 0x3f;
				h2 = bits >> 12 & 0x3f;
				h3 = bits >> 6 & 0x3f;
				h4 = bits & 0x3f;

				// use hexets to index into b64, and append result to encoded string
				tmp_arr[ac++] = b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4);
			} while (i < data.length);

			enc = tmp_arr.join('');

			var r = data.length % 3;

			return (r ? enc.slice(0, r - 3) : enc) + '==='.slice(r || 3);
		};
	}

	if (typeof global.atob === 'undefined') {
		global.atob = function(data) {
			//  discuss at: http://phpjs.org/functions/base64_decode/
			// original by: Tyler Akins (http://rumkin.com)
			// improved by: Thunder.m
			// improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
			// improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
			//    input by: Aman Gupta
			//    input by: Brett Zamir (http://brett-zamir.me)
			// bugfixed by: Onno Marsman
			// bugfixed by: Pellentesque Malesuada
			// bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
			//   example 1: base64_decode('S2V2aW4gdmFuIFpvbm5ldmVsZA==');
			//   returns 1: 'Kevin van Zonneveld'

			var o1,o2,o3,h1,h2,h3,h4,bits,i = 0,ac = 0,dec = '',tmp_arr = [];

			if (!data) {
				return data;
			}

			data += '';

			do { // unpack four hexets into three octets using index points in b64
				h1 = b64.indexOf(data.charAt(i++));
				h2 = b64.indexOf(data.charAt(i++));
				h3 = b64.indexOf(data.charAt(i++));
				h4 = b64.indexOf(data.charAt(i++));

				bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;

				o1 = bits >> 16 & 0xff;
				o2 = bits >> 8 & 0xff;
				o3 = bits & 0xff;

				if (h3 == 64) {
					tmp_arr[ac++] = String.fromCharCode(o1);
				} else if (h4 == 64) {
					tmp_arr[ac++] = String.fromCharCode(o1, o2);
				} else {
					tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
				}
			} while (i < data.length);

			dec = tmp_arr.join('');

			return dec;
		};
	}

	if (!Array.prototype.map) {
		Array.prototype.map = function(fun /*, thisArg */) {
			if (this === void 0 || this === null || typeof fun !== "function")
				throw new TypeError();

			var t = Object(this), len = t.length >>> 0, res = new Array(len);
			var thisArg = arguments.length > 1 ? arguments[1] : void 0;
			for (var i = 0; i < len; i++) {
				// NOTE: Absolute correctness would demand Object.defineProperty
				//       be used.  But this method is fairly new, and failure is
				//       possible only if Object.prototype or Array.prototype
				//       has a property |i| (very unlikely), so use a less-correct
				//       but more portable alternative.
				if (i in t)
					res[i] = fun.call(thisArg, t[i], i, t);
			}

			return res;
		};
	}


	if(!Array.isArray) {
		Array.isArray = function(arg) {
			return Object.prototype.toString.call(arg) === '[object Array]';
		};
	}

	if (!Array.prototype.forEach) {
		Array.prototype.forEach = function(fun, thisArg) {
			"use strict";

			if (this === void 0 || this === null || typeof fun !== "function")
				throw new TypeError();

			var t = Object(this), len = t.length >>> 0;
			for (var i = 0; i < len; i++) {
				if (i in t)
					fun.call(thisArg, t[i], i, t);
			}
		};
	}

	if (!Object.keys) {
		Object.keys = (function () {
			'use strict';

			var hasOwnProperty = Object.prototype.hasOwnProperty,
				hasDontEnumBug = !({toString: null}).propertyIsEnumerable('toString'),
				dontEnums = ['toString','toLocaleString','valueOf','hasOwnProperty',
					'isPrototypeOf','propertyIsEnumerable','constructor'],
				dontEnumsLength = dontEnums.length;

			return function (obj) {
				if (typeof obj !== 'object' && (typeof obj !== 'function' || obj === null)) {
					throw new TypeError();
				}
				var result = [], prop, i;

				for (prop in obj) {
					if (hasOwnProperty.call(obj, prop)) {
						result.push(prop);
					}
				}

				if (hasDontEnumBug) {
					for (i = 0; i < dontEnumsLength; i++) {
						if (hasOwnProperty.call(obj, dontEnums[i])) {
							result.push(dontEnums[i]);
						}
					}
				}
				return result;
			};
		}());
	}

	if (!String.prototype.trim) {
		String.prototype.trim = function () {
			return this.replace(/^\s+|\s+$/g, '');
		};
	}
	if (!String.prototype.trimLeft) {
		String.prototype.trimLeft = function() {
			return this.replace(/^\s+/g, "");
		};
	}
	if (!String.prototype.trimRight) {
		String.prototype.trimRight = function() {
			return this.replace(/\s+$/g, "");
		};
	}

})(typeof self !== "undefined" && self || typeof window !== "undefined" && window || this);