/*
 * jQuery flashScroll - v0.1
 * http://tamerayd.in/jquery-flashscroll
 *
 * Written by TAMER AYDIN - http://tamerayd.in
 *
 * This work is licensed under the Creative Commons Attribution 3.0 Unported License.
 * To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/
 * or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.
 */
(function( $ ){
    var scrollRepeat;
    var acceleration = 0;
	var methods = {

		init : function( options ) {

            return this.each(function() {

                var $this = $(this);
                var scrollRepeat;
                var settings = {
                    generatebuttons : false
                };

                if (options) {
                    $.extend(settings,options);
                }
                
                $this.css('overflow','hidden');
                $this.prepend('<div class="flashScrollWrapper">');
                $('.flashScrollWrapper').css({'width':$('.flashScrollWrapper').parent().css('width')});//ie
                $this.children().not('.flashScrollWrapper').clone().appendTo('.flashScrollWrapper');
                $this.children().not('.flashScrollWrapper').remove();
                $('.scrollUp').bind('mouseover',function () {scrollRepeat = setInterval(function(){acceleration=acceleration+40;$this.flashscroll('up');},40);});
                $('.scrollDown').bind('mouseover',function () {scrollRepeat = setInterval(function(){acceleration=acceleration+40;$this.flashscroll('down');},40);});
                $('.scrollUp').bind('mouseout',function () {
                    clearInterval(scrollRepeat);
                    acceleration=0;
                    var currentTopM = parseInt($('.flashScrollWrapper').css('margin-top').substring(0,$('.flashScrollWrapper').css('margin-top').length-2));
                    if (currentTopM>=0 && currentTopM<20)
                        $('.flashScrollWrapper').animate({'margin-top':0},'fast');
                    else
                        $('.flashScrollWrapper').animate({'margin-top':currentTopM+10},'fast');
                });
                $('.scrollDown').bind('mouseout',function () {
                    clearInterval(scrollRepeat);
                    acceleration=0;
                    var currentTopM = parseInt($('.flashScrollWrapper').css('margin-top').substring(0,$('.flashScrollWrapper').css('margin-top').length-2));
                    var elementH = $this.height();
                    var wrapperH = $('.flashScrollWrapper').height();
                    if (currentTopM<=elementH-wrapperH || currentTopM<elementH-wrapperH-20)
                        $('.flashScrollWrapper').animate({'margin-top':elementH-wrapperH},'fast');
                    else
                        $('.flashScrollWrapper').animate({'margin-top':currentTopM-10},'fast');
                });
            });

		},
        up : function () {
            return this.each(function() {
                methods.scroll({'element':$(this),'direction':'up'});
            });
        },
        down : function () {
            return this.each(function() {
                methods.scroll({'element':$(this),'direction':'down'});
            });
        },
        scroll : function ( properties ) {

            var sElement = $(properties.element);
            var sWrapper = sElement.children('.flashScrollWrapper');
            var sWrapperTopM = sWrapper.css('margin-top');
            var currentPos = parseInt(sWrapperTopM.substring(0,sWrapperTopM.length-2));

            switch (properties.direction) {
                case 'up':
                    if (currentPos<0)
                        sWrapper.css('margin-top',(currentPos+(5+(acceleration/100))));
                    break;
                default:
                    if (currentPos>sElement.height()-sWrapper.height())
                        sWrapper.css('margin-top',(currentPos-(5+(acceleration/100))));
                    break;
            }
            
        }
	};

	$.fn.flashscroll = function( method ) {
		if ( methods[method] ) {
			return methods[ method ].apply( this, Array.prototype.slice.call( arguments, 1 ));
		} else if ( typeof method === 'object' || ! method ) {
			return methods.init.apply( this, arguments );	
		} else {
			$.error( 'Method ' +  method + ' does not exist on jquery.flashscroll!' );
		}
	};
	
})( jQuery );