/*
 * simplyScroll 1.0.4 - a scroll-tastic jQuery plugin
 *
 * http://logicbox.net/jquery/simplyscroll
 * http://logicbox.net/blog/simplyscroll-jquery-plugin
 * http://plugins.jquery.com/project/simplyScroll
 *
 * Copyright (c) 2009 Will Kelly - http://logicbox.net
 *
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * Last revised: 03/07/2009 21:13
 *
 */

(function($) {

$.fn.simplyScroll = function(o) {
	return this.each(function() {
		new $.simplyScroll(this,o);
	});
};

var defaults = {
	className: 'simply-scroll',
	frameRate: 24, //No of movements per second
	speed: 1, //No of pixels per frame
	horizontal: true,
	autoMode: 'off', //disables buttons 'loop','bounce'
	pauseOnHover: true,
	startOnLoad: false, //use this if having rendering problems (safari 3 + Mac OSX?)
	localJsonSource: '', //format [{"src":"images/pic.jpg","title":"title","link":"http://"},{etc..}]
	flickrFeed: '',
	jsonImgWidth: 240,
	jsonImgHeight: 180
};
	
$.simplyScroll = function(el,o) {
	
	var self = this;
	
	this.o = $.extend({}, defaults, o || {});
	this.auto = this.o.autoMode!=="off" ? true : false;
	
	//called on ul/ol/div etc
	this.$list = $(el);
	
	//generate extra markup
	this.$list.addClass('simply-scroll-list')
		.wrap('<div class="simply-scroll-clip"></div>')
		.parent().wrap('<div class="' + this.o.className + ' simply-scroll-container"></div>');
	
	if (!this.o.auto) { //button placeholders
		this.$list.parent().parent()
		.prepend('<div class="simply-scroll-forward"></div>')
		.prepend('<div class="simply-scroll-back"></div>');
	}
	
	//load image data
	if (this.o.flickrFeed) {
		$.getJSON(this.o.flickrFeed + "&format=json&jsoncallback=?",
			function(data) {
				json = [];
				$.each(data.items, function(i,item) {
					json.push({
						"src": item.media.m,
						"title": item.title,
						"link": item.link
					});
				});
				self.renderData(json);
			}
		);
	} else if (this.o.localJsonSource) {
		$.getJSON(this.o.localJsonSource,
			function(json) {
				self.renderData(json);
			}
		);
	} else {
		
		if (!this.o.startOnLoad) {
			this.init();
		} else {
			//wait for load before completing setup
			$(window).load(function() { self.init();  });
		}
		
	}
		
};
	
$.simplyScroll.fn = $.simplyScroll.prototype = {};

$.simplyScroll.fn.extend = $.simplyScroll.extend = $.extend;

$.simplyScroll.fn.extend({
	init: function() {
		//shortcuts
		this.$items = this.$list.children();
		this.$clip = this.$list.parent();
		this.$container = this.$clip.parent();

		if (!this.o.horizontal) {
			this.itemMax = this.$items[0].offsetHeight; //this.$items[0].offsetHeight;
			this.clipMax = this.$clip.height(); //this.$clip[0].offsetHeight;
			this.dimension = 'height';			
			this.moveBackClass = 'simply-scroll-btn-up';
			this.moveForwardClass = 'simply-scroll-btn-down';
		} else {
			this.itemMax = this.$items[0].offsetWidth+20;
			this.clipMax = this.$clip.width();			
			this.dimension = 'width';
			this.moveBackClass = 'simply-scroll-btn-left';
			this.moveForwardClass = 'simply-scroll-btn-right';
		}
		
		this.posMin = 0;
		this.posMax = this.$items.length * this.itemMax;
		this.$list.css(this.dimension,this.posMax +'px');
		
		if (this.o.autoMode=='loop') {
			var addItems = Math.ceil(this.clipMax / this.itemMax);	
			this.$items.slice(0,addItems).clone(true).appendTo(this.$list);		
			this.posMax += (this.clipMax - this.o.speed);
			this.$list.css(this.dimension,this.posMax+(this.itemMax*addItems) +'px');
		}

		
		this.interval = null;	
		this.intervalDelay = Math.floor(1000 / this.o.frameRate);
		
		//ensure that speed is divisible by item width
		while (this.itemMax % this.o.speed !== 0) {
			this.o.speed--;
			if (this.o.speed===0) {
				this.o.speed=1; break;	
			}
		}
		
		var self = this;
		this.trigger = null;
		this.funcMoveBack = function() { self.trigger=this;self.moveBack(); };
		this.funcMoveForward = function() { self.trigger=this;self.moveForward(); };
		this.funcMoveStop = function() { self.moveStop(); };
		this.funcMoveResume = function() { self.moveResume(); };
		
		if (this.auto) {
			if (this.o.pauseOnHover) {
				this.$clip.hover(this.funcMoveStop,this.funcMoveResume);
			}
			this.moveForward();
		} else {
			this.$btnBack = $('.simply-scroll-back',this.$container)
				.addClass('simply-scroll-btn' + ' ' + this.moveBackClass + ' ' + 'disabled')
				.hover(this.funcMoveBack,this.funcMoveStop);
			this.$btnForward = $('.simply-scroll-forward',this.$container)
				.addClass('simply-scroll-btn' + ' ' + this.moveForwardClass)
				.hover(this.funcMoveForward,this.funcMoveStop);
		}
	},
	moveForward: function() {
		var self = this;
		this.movement = 'forward';
		if (this.trigger !== null) {
			this.$btnBack.removeClass('disabled');
		}
		self.interval = setInterval(function() {
			if (!self.o.horizontal && self.$clip[0].scrollTop < (self.posMax-self.clipMax)) {
				self.$clip[0].scrollTop += self.o.speed;
			} else if (self.o.horizontal && self.$clip[0].scrollLeft < (self.posMax-self.clipMax)) {
				self.$clip[0].scrollLeft += self.o.speed; 
			} else if (self.o.autoMode=='loop') {
				self.resetPos();
			} else {
				self.moveStop(self.movement);
			}
		},self.intervalDelay);
	},
	moveBack: function() {
		var self = this;
		this.movement = 'back';
		if (this.trigger !== null) {
			this.$btnForward.removeClass('disabled');
		}
		self.interval = setInterval(function() {
			if (!self.o.horizontal && self.$clip[0].scrollTop>0) {
				self.$clip[0].scrollTop -= self.o.speed;
			} else if (self.o.horizontal && self.$clip[0].scrollLeft>0) {
				self.$clip[0].scrollLeft -= self.o.speed;
			} else if (self.o.autoMode=='loop') {
				self.resetPos();
			} else {
				self.moveStop(self.movement);
			}
		},self.intervalDelay);
	},
	moveStop: function(moveDir) {
		clearInterval(this.interval);	
		if (this.trigger!==null) {
			if (typeof moveDir != "undefined") {
				$(this.trigger).addClass('disabled');
			}
			this.trigger = null;
		}
		if (this.auto) {
			if (this.o.autoMode=='bounce') {
				moveDir == 'forward' ? this.moveBack() : this.moveForward();
			}
		}
	},
	moveResume: function() {
		this.movement=='forward' ? this.moveForward() : this.moveBack();
	},
	resetPos: function() {
		if (!this.o.horizontal) {
			this.$clip[0].scrollTop = 0;
		} else {
			this.$clip[0].scrollLeft = 0;
		}
	},
	renderData: function(json) {
		if (json.length>0) { //render json data
			var self = this;
			$.each(json, function(i,item) {
				$("<img/>").attr({
					src: item.src,
					title: item.title,
					alt: item.title,
					width: self.o.jsonImgWidth,
					height: self.o.jsonImgHeight
				}).appendTo(self.$list);
			});
			this.init();
		}
	}
});
		  
})(jQuery);

/*
 * 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. 
 *
*/

// 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;
	}
});