ttrss/lib/dojo/dnd/autoscroll.js

/*
	Copyright (c) 2004-2011, 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
*/

//>>built
define("dojo/dnd/autoscroll",["../main","../window"],function(_1){_1.getObject("dnd",true,_1);_1.dnd.getViewport=_1.window.getBox;_1.dnd.V_TRIGGER_AUTOSCROLL=32;_1.dnd.H_TRIGGER_AUTOSCROLL=32;_1.dnd.V_AUTOSCROLL_VALUE=16;_1.dnd.H_AUTOSCROLL_VALUE=16;_1.dnd.autoScroll=function(e){var v=_1.window.getBox(),dx=0,dy=0;if(e.clientX<_1.dnd.H_TRIGGER_AUTOSCROLL){dx=-_1.dnd.H_AUTOSCROLL_VALUE;}else{if(e.clientX>v.w-_1.dnd.H_TRIGGER_AUTOSCROLL){dx=_1.dnd.H_AUTOSCROLL_VALUE;}}if(e.clientY<_1.dnd.V_TRIGGER_AUTOSCROLL){dy=-_1.dnd.V_AUTOSCROLL_VALUE;}else{if(e.clientY>v.h-_1.dnd.V_TRIGGER_AUTOSCROLL){dy=_1.dnd.V_AUTOSCROLL_VALUE;}}window.scrollBy(dx,dy);};_1.dnd._validNodes={"div":1,"p":1,"td":1};_1.dnd._validOverflow={"auto":1,"scroll":1};_1.dnd.autoScrollNodes=function(e){var b,t,w,h,rx,ry,dx=0,dy=0,_2,_3;for(var n=e.target;n;){if(n.nodeType==1&&(n.tagName.toLowerCase() in _1.dnd._validNodes)){var s=_1.getComputedStyle(n),_4=(s.overflow.toLowerCase() in _1.dnd._validOverflow),_5=(s.overflowX.toLowerCase() in _1.dnd._validOverflow),_6=(s.overflowY.toLowerCase() in _1.dnd._validOverflow);if(_4||_5||_6){b=_1._getContentBox(n,s);t=_1.position(n,true);}if(_4||_5){w=Math.min(_1.dnd.H_TRIGGER_AUTOSCROLL,b.w/2);rx=e.pageX-t.x;if(_1.isWebKit||_1.isOpera){rx+=_1.body().scrollLeft;}dx=0;if(rx>0&&rx<b.w){if(rx<w){dx=-w;}else{if(rx>b.w-w){dx=w;}}_2=n.scrollLeft;n.scrollLeft=n.scrollLeft+dx;}}if(_4||_6){h=Math.min(_1.dnd.V_TRIGGER_AUTOSCROLL,b.h/2);ry=e.pageY-t.y;if(_1.isWebKit||_1.isOpera){ry+=_1.body().scrollTop;}dy=0;if(ry>0&&ry<b.h){if(ry<h){dy=-h;}else{if(ry>b.h-h){dy=h;}}_3=n.scrollTop;n.scrollTop=n.scrollTop+dy;}}if(dx||dy){return;}}try{n=n.parentNode;}catch(x){n=null;}}_1.dnd.autoScroll(e);};return _1.dnd;});