/*
	Copyright (c) 2004-2008, The Dojo Foundation All Rights Reserved.
	Available via Academic Free License >= 2.1 OR the modified BSD license.
	see: http://dojotoolkit.org/license for details
*/


if(!dojo._hasResource["dojo.dnd.autoscroll"]){dojo._hasResource["dojo.dnd.autoscroll"]=true;dojo.provide("dojo.dnd.autoscroll");dojo.dnd.getViewport=function(){var d=dojo.doc,dd=d.documentElement,w=window,b=dojo.body();if(dojo.isMozilla){return {w:dd.clientWidth,h:w.innerHeight};}else{if(!dojo.isOpera&&w.innerWidth){return {w:w.innerWidth,h:w.innerHeight};}else{if(!dojo.isOpera&&dd&&dd.clientWidth){return {w:dd.clientWidth,h:dd.clientHeight};}else{if(b.clientWidth){return {w:b.clientWidth,h:b.clientHeight};}}}}return null;};dojo.dnd.V_TRIGGER_AUTOSCROLL=32;dojo.dnd.H_TRIGGER_AUTOSCROLL=32;dojo.dnd.V_AUTOSCROLL_VALUE=16;dojo.dnd.H_AUTOSCROLL_VALUE=16;dojo.dnd.autoScroll=function(e){var v=dojo.dnd.getViewport(),dx=0,dy=0;if(e.clientX<dojo.dnd.H_TRIGGER_AUTOSCROLL){dx=-dojo.dnd.H_AUTOSCROLL_VALUE;}else{if(e.clientX>v.w-dojo.dnd.H_TRIGGER_AUTOSCROLL){dx=dojo.dnd.H_AUTOSCROLL_VALUE;}}if(e.clientY<dojo.dnd.V_TRIGGER_AUTOSCROLL){dy=-dojo.dnd.V_AUTOSCROLL_VALUE;}else{if(e.clientY>v.h-dojo.dnd.V_TRIGGER_AUTOSCROLL){dy=dojo.dnd.V_AUTOSCROLL_VALUE;}}window.scrollBy(dx,dy);};dojo.dnd._validNodes={"div":1,"p":1,"td":1};dojo.dnd._validOverflow={"auto":1,"scroll":1};dojo.dnd.autoScrollNodes=function(e){for(var n=e.target;n;){if(n.nodeType==1&&(n.tagName.toLowerCase() in dojo.dnd._validNodes)){var s=dojo.getComputedStyle(n);if(s.overflow.toLowerCase() in dojo.dnd._validOverflow){var b=dojo._getContentBox(n,s),t=dojo._abs(n,true);var w=Math.min(dojo.dnd.H_TRIGGER_AUTOSCROLL,b.w/2),h=Math.min(dojo.dnd.V_TRIGGER_AUTOSCROLL,b.h/2),rx=e.pageX-t.x,ry=e.pageY-t.y,dx=0,dy=0;if(dojo.isSafari||dojo.isOpera){rx+=dojo.body().scrollLeft,ry+=dojo.body().scrollTop;}if(rx>0&&rx<b.w){if(rx<w){dx=-w;}else{if(rx>b.w-w){dx=w;}}}if(ry>0&&ry<b.h){if(ry<h){dy=-h;}else{if(ry>b.h-h){dy=h;}}}var _14=n.scrollLeft,_15=n.scrollTop;n.scrollLeft=n.scrollLeft+dx;n.scrollTop=n.scrollTop+dy;if(_14!=n.scrollLeft||_15!=n.scrollTop){return;}}}try{n=n.parentNode;}catch(x){n=null;}}dojo.dnd.autoScroll(e);};}