/*!
 * Documenter 2.0
 * http://rxa.li/documenter
 *
 * Copyright 2011, Xaver Birsak
 * http://revaxarts.com
 *
 */
 
$(document).ready(function() {
    var timeout,
        sections = new Array(),
        sectionscount = 0,
        win = $(window),
        sidebar = $('#documenter_sidebar'),
        nav = $('#documenter_nav'),
        logo = $('#documenter_logo'),
        navanchors = nav.find('a'),
        timeoffset = 50,
        hash = location.hash || null;
        iDeviceNotOS4 = (navigator.userAgent.match(/iphone|ipod|ipad/i) && !navigator.userAgent.match(/OS 5/i)) || false,
        badIE = $('html').prop('class').match(/ie(6|7|8)/)|| false;
        
    //handle external links (new window)
    $('a[href^=http]').bind('click',function(){
        window.open($(this).attr('href'));
        return false;
    });
    
    //IE 8 and lower doesn't like the smooth pagescroll
    if(!badIE){
        window.scroll(0,0);
        
        $('a[href^=#]').bind('click touchstart',function(){
            hash = $(this).attr('href');
            $.scrollTo.window().queue([]).stop();
            goTo(hash);
            return false;
        });
        
        //if a hash is set => go to it
        if(hash){
            setTimeout(function(){
                goTo(hash);
            },800);
        }
    }
    
    
    //We need the position of each section until the full page with all images is loaded
    win.bind('load',function(){
        
        var sectionselector = 'section';
        
        //Documentation has subcategories       
        if(nav.find('ol').length){
            sectionselector = 'section, h4';
        }
        //saving some information
        $(sectionselector).each(function(i,e){
            var _this = $(this);
            var p = {
                id: this.id,
                pos: _this.offset().top
            };
            sections.push(p);
        });
        
        
        //iPhone, iPod and iPad don't trigger the scroll event
        if(iDeviceNotOS4){
            nav.find('a').bind('click',function(){
                setTimeout(function(){
                    win.trigger('scroll');              
                },duration);
                
            });
            //scroll to top
            window.scroll(0,0);
        }

        //how many sections
        sectionscount = sections.length;
        
        //bind the handler to the scroll event
        win.bind('scroll',function(event){
            clearInterval(timeout);
            //should occur with a delay
            timeout = setTimeout(function(){
                //get the position from the very top in all browsers
                pos = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;
                
                //iDeviceNotOS4s don't know the fixed property so we fake it
                if(iDeviceNotOS4){
                    sidebar.css({height:document.height});
                    logo.css({'margin-top':pos});
                }
                //activate Nav element at the current position
                activateNav(pos);
            },timeoffset);
        }).trigger('scroll');

    });
    
    //the function is called when the hash changes
    function hashchange(){
        goTo(location.hash, false);
    }
    
    //scroll to a section and set the hash
    function goTo(hash,changehash){
        win.unbind('hashchange', hashchange);
        hash = hash.replace(/!\//,'');
        win.stop().scrollTo(hash,duration,{
            easing:easing,
            axis:'y'            
        });
        if(changehash !== false){
            var l = location;
            location.href = (l.protocol+'//'+l.host+l.pathname+'#!/'+hash.substr(1));
        }
        win.bind('hashchange', hashchange);
    }
    
    
    //activate current nav element
    function activateNav(pos){
        var offset = 100,
        current, next, parent, isSub, hasSub;
        win.unbind('hashchange', hashchange);
        for(var i=sectionscount;i>0;i--){
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                navanchors.removeClass('current');
                current = navanchors.eq(i-1);
                current.addClass('current');
                
                parent = current.parent().parent();
                next = current.next();
                
                hasSub = next.is('ul');
                isSub = !parent.is('#documenter_nav');
                
                nav.find('ol:visible').not(parent).slideUp('fast');
                if(isSub){
                    parent.prev().addClass('current');
                    parent.stop().slideDown('fast');
                }else if(hasSub){
                    next.stop().slideDown('fast');
                }
                win.bind('hashchange', hashchange);
                break;
            };
        }   
    }
    
    // make code pretty
    window.prettyPrint && prettyPrint();
    
});