/*
 * jQuery Easing v1.3 - http://gsgd.co.uk/sandbox/jquery/easing/
 *
 * Uses the built in easing capabilities added In jQuery 1.1
 * to offer multiple easing options
 *
 * TERMS OF USE - jQuery Easing
 *
 * Open source under the BSD License.
 *
 * Copyright © 2008 George McGinley Smith
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 *
 * Neither the name of the author nor the names of contributors may be used to endorse
 * or promote products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 *  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
*/
(function (factory) {
	if (typeof define === 'function' && define.amd) {
		// AMD. Register as an anonymous module depending on jQuery.
		define(["jquery"], factory);
	} else {
		// No AMD. Register plugin with global jQuery object.
		factory(jQuery);
	}
}(function ($) {

// t: current time, b: begInnIng value, c: change In value, d: duration
	jQuery.easing['jswing'] = jQuery.easing['swing'];

	jQuery.extend( jQuery.easing,
		{
			def: 'easeOutQuad',
			swing: function (x, t, b, c, d) {
				//alert(jQuery.easing.default);
				return jQuery.easing[jQuery.easing.def](x, t, b, c, d);
			},
			easeInQuad: function (x, t, b, c, d) {
				return c*(t/=d)*t + b;
			},
			easeOutQuad: function (x, t, b, c, d) {
				return -c *(t/=d)*(t-2) + b;
			},
			easeInOutQuad: function (x, t, b, c, d) {
				if ((t/=d/2) < 1) return c/2*t*t + b;
				return -c/2 * ((--t)*(t-2) - 1) + b;
			},
			easeInCubic: function (x, t, b, c, d) {
				return c*(t/=d)*t*t + b;
			},
			easeOutCubic: function (x, t, b, c, d) {
				return c*((t=t/d-1)*t*t + 1) + b;
			},
			easeInOutCubic: function (x, t, b, c, d) {
				if ((t/=d/2) < 1) return c/2*t*t*t + b;
				return c/2*((t-=2)*t*t + 2) + b;
			},
			easeInQuart: function (x, t, b, c, d) {
				return c*(t/=d)*t*t*t + b;
			},
			easeOutQuart: function (x, t, b, c, d) {
				return -c * ((t=t/d-1)*t*t*t - 1) + b;
			},
			easeInOutQuart: function (x, t, b, c, d) {
				if ((t/=d/2) < 1) return c/2*t*t*t*t + b;
				return -c/2 * ((t-=2)*t*t*t - 2) + b;
			},
			easeInQuint: function (x, t, b, c, d) {
				return c*(t/=d)*t*t*t*t + b;
			},
			easeOutQuint: function (x, t, b, c, d) {
				return c*((t=t/d-1)*t*t*t*t + 1) + b;
			},
			easeInOutQuint: function (x, t, b, c, d) {
				if ((t/=d/2) < 1) return c/2*t*t*t*t*t + b;
				return c/2*((t-=2)*t*t*t*t + 2) + b;
			},
			easeInSine: function (x, t, b, c, d) {
				return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
			},
			easeOutSine: function (x, t, b, c, d) {
				return c * Math.sin(t/d * (Math.PI/2)) + b;
			},
			easeInOutSine: function (x, t, b, c, d) {
				return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
			},
			easeInExpo: function (x, t, b, c, d) {
				return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
			},
			easeOutExpo: function (x, t, b, c, d) {
				return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
			},
			easeInOutExpo: function (x, t, b, c, d) {
				if (t==0) return b;
				if (t==d) return b+c;
				if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
				return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
			},
			easeInCirc: function (x, t, b, c, d) {
				return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
			},
			easeOutCirc: function (x, t, b, c, d) {
				return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
			},
			easeInOutCirc: function (x, t, b, c, d) {
				if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b;
				return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b;
			},
			easeInElastic: function (x, t, b, c, d) {
				var s=1.70158;var p=0;var a=c;
				if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
				if (a < Math.abs(c)) { a=c; var s=p/4; }
				else var s = p/(2*Math.PI) * Math.asin (c/a);
				return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
			},
			easeOutElastic: function (x, t, b, c, d) {
				var s=1.70158;var p=0;var a=c;
				if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
				if (a < Math.abs(c)) { a=c; var s=p/4; }
				else var s = p/(2*Math.PI) * Math.asin (c/a);
				return a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
			},
			easeInOutElastic: function (x, t, b, c, d) {
				var s=1.70158;var p=0;var a=c;
				if (t==0) return b;  if ((t/=d/2)==2) return b+c;  if (!p) p=d*(.3*1.5);
				if (a < Math.abs(c)) { a=c; var s=p/4; }
				else var s = p/(2*Math.PI) * Math.asin (c/a);
				if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
				return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
			},
			easeInBack: function (x, t, b, c, d, s) {
				if (s == undefined) s = 1.70158;
				return c*(t/=d)*t*((s+1)*t - s) + b;
			},
			easeOutBack: function (x, t, b, c, d, s) {
				if (s == undefined) s = 1.70158;
				return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
			},
			easeInOutBack: function (x, t, b, c, d, s) {
				if (s == undefined) s = 1.70158;
				if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
				return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
			},
			easeInBounce: function (x, t, b, c, d) {
				return c - jQuery.easing.easeOutBounce (x, d-t, 0, c, d) + b;
			},
			easeOutBounce: function (x, t, b, c, d) {
				if ((t/=d) < (1/2.75)) {
					return c*(7.5625*t*t) + b;
				} else if (t < (2/2.75)) {
					return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
				} else if (t < (2.5/2.75)) {
					return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
				} else {
					return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
				}
			},
			easeInOutBounce: function (x, t, b, c, d) {
				if (t < d/2) return jQuery.easing.easeInBounce (x, t*2, 0, c, d) * .5 + b;
				return jQuery.easing.easeOutBounce (x, t*2-d, 0, c, d) * .5 + c*.5 + b;
			}
		});

	/*
 * jQuery.appear
 * https://github.com/bas2k/jquery.appear/
 * http://code.google.com/p/jquery-appear/
 * http://bas2k.ru/
 *
 * Copyright (c) 2009 Michael Hixson
 * Copyright (c) 2012-2014 Alexander Brovikov
 * Licensed under the MIT license (http://www.opensource.org/licenses/mit-license.php)
 */
	$.fn.appear = function(fn, options) {

		var settings = $.extend({

			//arbitrary data to pass to fn
			data: undefined,

			//call fn only on the first appear?
			one: true,

			// X & Y accuracy
			accX: 0,
			accY: 0

		}, options);

		return this.each(function() {

			var t = $(this);

			//whether the element is currently visible
			t.appeared = false;

			if (!fn) {

				//trigger the custom event
				t.trigger('appear', settings.data);
				return;
			}

			var w = $(window);

			//fires the appear event when appropriate
			var check = function() {

				//is the element hidden?
				if (!t.is(':visible')) {

					//it became hidden
					t.appeared = false;
					return;
				}

				//is the element inside the visible window?
				var a = w.scrollLeft();
				var b = w.scrollTop();
				var o = t.offset();
				var x = o.left;
				var y = o.top;

				var ax = settings.accX;
				var ay = settings.accY;
				var th = t.height();
				var wh = w.height();
				var tw = t.width();
				var ww = w.width();

				if (y + th + ay >= b &&
					y <= b + wh + ay &&
					x + tw + ax >= a &&
					x <= a + ww + ax) {

					//trigger the custom event
					if (!t.appeared) t.trigger('appear', settings.data);

				} else {

					//it scrolled out of view
					t.appeared = false;
				}
			};

			//create a modified fn with some additional logic
			var modifiedFn = function() {

				//mark the element as visible
				t.appeared = true;

				//is this supposed to happen only once?
				if (settings.one) {

					//remove the check
					w.unbind('scroll', check);
					var i = $.inArray(check, $.fn.appear.checks);
					if (i >= 0) $.fn.appear.checks.splice(i, 1);
				}

				//trigger the original fn
				fn.apply(this, arguments);
			};

			//bind the modified fn to the element
			if (settings.one) t.one('appear', settings.data, modifiedFn);
			else t.bind('appear', settings.data, modifiedFn);

			//check whenever the window scrolls
			w.scroll(check);

			//check whenever the dom changes
			$.fn.appear.checks.push(check);

			//check now
			(check)();
		});
	};

	//keep a queue of appearance checks
	$.extend($.fn.appear, {

		checks: [],
		timeout: null,

		//process the queue
		checkAll: function() {
			var length = $.fn.appear.checks.length;
			if (length > 0) while (length--) ($.fn.appear.checks[length])();
		},

		//check the queue asynchronously
		run: function() {
			if ($.fn.appear.timeout) clearTimeout($.fn.appear.timeout);
			$.fn.appear.timeout = setTimeout($.fn.appear.checkAll, 20);
		}
	});

	//run checks when these methods are called
	$.each(['append', 'prepend', 'after', 'before', 'attr',
		'removeAttr', 'addClass', 'removeClass', 'toggleClass',
		'remove', 'css', 'show', 'hide'], function(i, n) {
		var old = $.fn[n];
		if (old) {
			$.fn[n] = function() {
				var r = old.apply(this, arguments);
				$.fn.appear.run();
				return r;
			}
		}
	});
}));