source: extensions/rv_tscroller/rv_tscroller.js @ 20414

/*
Don't use directly. Compile on http://closure-compiler.appspot.com/home
*/
if (window.jQuery && window.RVTS)
(function($){
if (RVTS.start>0) {
        var $f = $('.navigationBar A[rel=first]');
        var f = '<a href="'+$f.attr("href")+'">'+$f.html()+'</a> | ';
        $('#thumbnails').before( '<div id=rvtsUp style="text-align:center;font-size:120%;margin:10px">'+f+'<a href="javascript:RVTS.loadUp()">'+RVTS.prevMsg+"</a></div>" );
}

RVTS = $.fn.extend( RVTS, {
loading: 0,
loadingUp: 0,
adjust: 0,

loadUp: function() {
        if (RVTS.loadingUp || RVTS.start <= 0) return;
        var newStart = RVTS.start-RVTS.perPage,
                reqCount = RVTS.perPage;
        if (newStart<0)
        {
                reqCount += newStart;
                newStart = 0;
        }
        var url = RVTS.ajaxUrlModel.replace('%start%', newStart).replace('%per%', reqCount);
        $('#ajaxLoader').show();
        RVTS.loadingUp = 1;
        $.ajax({
                type:'GET', dataType:'html', 'url': url,
                success: function(htm) {
                        RVTS.start = newStart;
                        RVTS.$thumbs.prepend(htm);
                        if (RVTS.start<=0)
                                $("#rvtsUp").remove();
                },
                complete: function() {
                        RVTS.loadingUp = 0;
                        RVTS.loading || $('#ajaxLoader').hide();
                        $(window).trigger('RVTS_loaded', 0);
                        if (typeof pwg_ajax_thumbnails_loader != 'undefined')
                                pwg_ajax_thumbnails_loader();
                        }
                });
},

doAutoScroll: function() {
        if (RVTS.loading || RVTS.next >= RVTS.total) return;
        var url = RVTS.ajaxUrlModel.replace('%start%', RVTS.next).replace('%per%', RVTS.perPage);
        if (RVTS.adjust) {
                url += '&adj=' + RVTS.adjust;
                RVTS.adjust=0;
        }
        $('#ajaxLoader').show();
        RVTS.loading = 1;
        $.ajax({
                type:'GET', dataType:'html', 'url': url,
                success: function(htm) {
                        RVTS.next+=RVTS.perPage;
                        RVTS.$thumbs.append(htm);
                        if (RVTS.next-RVTS.start>500 && RVTS.total-RVTS.next>50) {
                                RVTS.$thumbs.after(
                                        '<div style="text-align:center;font-size:180%;margin:0 0 20px"><a href="'
                                        +RVTS.moreUrlModel.replace('%start%', RVTS.next)+'">'
                                        +RVTS.moreMsg.replace('%d', RVTS.total-RVTS.next)
                                        +'</a></div>');
                                RVTS.total = 0;
                        }
                },
                complete: function() {
                        RVTS.loading = 0;
                        RVTS.loadingUp || $('#ajaxLoader').hide();
                        $(window).trigger('RVTS_loaded', 1);
                        if (typeof pwg_ajax_thumbnails_loader != 'undefined')
                                pwg_ajax_thumbnails_loader();
                        }
                });
},

checkAutoScroll: function(evt) {
        var tBot=RVTS.$thumbs.position().top+RVTS.$thumbs.outerHeight()
                ,wBot=$(window).scrollTop()+$(window).height();
        tBot -= !evt ? 0:100; //begin 100 pixels before end
        return tBot <= wBot ? (RVTS.doAutoScroll(),1) : 0;
},

engage: function() {
        var $w = $(window);
        RVTS.$thumbs = $('#thumbnails');
        RVTS.$thumbs.after('<div id="ajaxLoader" style="display:none;position:fixed;bottom:32px;right:1%;z-index:999"><img src="'+ RVTS.ajaxLoaderImage + '" width="128" height="15" alt="~"></div>');

        $w.scrollTop(0);
        if ( RVTS.$thumbs.outerHeight() < $w.height() )
                RVTS.adjust = 1;
        else if ( RVTS.$thumbs.height() > 2*$w.height() )
                RVTS.adjust = -1;
        $w.bind('scroll resize', RVTS.checkAutoScroll);
        if (RVTS.checkAutoScroll())
                window.setTimeout(RVTS.checkAutoScroll,1500);
}
} );//end extend

$(document).ready( function() {
        window.setTimeout(RVTS.engage,250);
});



})(jQuery);