/*
 * jQuery jScrollTouch plugin 1.1
 *
 * Copyright (c) 2010 Damien Rottemberg damien@dealinium.com
 *
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 *
 *
 */


(function($){
  $.fn.jScrollTouch = function () {
        if((navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i)) || (navigator.userAgent.match(/iPad/i))) {
                var isTouchScreen = 1;
        }else{
                var isTouchScreen = 0;
        }
        $(this).css({'overflow': 'auto','position':'relative'});
        return this.each(function() {
                var cont = $(this);
                
                var height = 0;
                var cpos = cont.scrollTop()
                cont.scrollTop(100000);
                height = cont.scrollTop();
                cont.scrollTop(cpos);
                var fullheight = height + cont.outerHeight();
                var scrollbarV_length = cont.innerHeight()*(cont.innerHeight()/fullheight)+2;
                
                var width = 0;
                var lpos = cont.scrollLeft();
                cont.scrollLeft(100000);
                width = cont.scrollLeft();
                cont.scrollLeft(lpos);
                var fullwidth = width + cont.outerWidth();
                var scrollbarH_length = cont.innerWidth()*(cont.innerWidth()/fullwidth)+2;
                
                
                if(isTouchScreen){
                        var scrollbarV = $('<div></div>');
                        scrollbarV.css({'display':'none','position':'absolute','width':'5px','height':scrollbarV_length+'px','left':cont.innerWidth()-7+'px','top':0,'background':'black','border':'1px white solid','-webkit-border-radius':'5px','opacity':'0.9'});
                        
                        var scrollbarH = $('<div></div>');
                        scrollbarH.css({'display':'none','position':'absolute','height':'5px','width':scrollbarH_length+'px','top':cont.innerHeight()-7+'px','left':0,'background':'black','border':'1px white solid','-webkit-border-radius':'5px','opacity':'0.9'});
                        
                        
                        if(height) cont.append(scrollbarV);
                        if(width) cont.append(scrollbarH);
                }
                
        
                cont.bind('mousedown touchstart',function(e){
                        cpos = cont.scrollTop();
                                        
                        if(isTouchScreen){
                                e = e.originalEvent.touches[0];
                        }
                        
                        if(isTouchScreen){
                                scrollbarV.show();
                                scrollbarH.show();
                        }
                        
                        var sY = e.pageY;
                        var sX = e.pageX;
                        
                        cont.bind('mousemove touchmove ',function(ev){
                                if(isTouchScreen){
                                        ev.preventDefault();
                                        ev = ev.originalEvent.touches[0];
                                        
                                }       
                                
                                var top = cpos-(ev.pageY-sY);
                                var left =  lpos-(ev.pageX-sX);
                                
                                cont.scrollTop(top);
                                cpos = cont.scrollTop();
                                sY = ev.pageY;
                                
                                cont.scrollLeft(left);
                                lpos = cont.scrollLeft();
                                sX = ev.pageX;
                                if(isTouchScreen){
                                        scrollbarV.css({'left':Math.min(cont.innerWidth()-7+lpos,fullwidth)+'px','top':Math.min(cpos+cpos*cont.innerHeight()/fullheight,fullheight-scrollbarV_length)+'px'});
                                        scrollbarH.css({'top':Math.min(cont.innerHeight()-7+cpos,fullheight)+'px','left':Math.min(lpos+lpos*cont.innerWidth()/fullwidth,fullwidth-scrollbarH_length)+'px'});
                                        
                                }       
                        });
                        cont.bind('mouseup touchend',function(ev){      
                                cont.unbind('mousemove touchmove mouseup touchend');
                                if(isTouchScreen){
                                        scrollbarV.fadeOut();
                                        scrollbarH.fadeOut();
                                }
                                
                        });
                });
        });
}
})(jQuery);