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/* ************************************************************************
qooxdoo - the new era of web development
http://qooxdoo.org
Copyright:
2004-2006 by 1&1 Internet AG, Germany, http://www.1and1.org
License:
LGPL 2.1: http://www.gnu.org/licenses/lgpl.html
Authors:
* Sebastian Werner (wpbasti)
* Andreas Ecker (ecker)
************************************************************************ */
/* ************************************************************************
************************************************************************ */
qx.OO.defineClass("qx.dom.ElementFromPoint");
qx.dom.ElementFromPoint.getElementFromPoint = function(x, y) {
return qx.dom.ElementFromPoint.getElementFromPointHandler(document.body, x, y);
}
qx.dom.ElementFromPoint.getElementFromPointHandler = function(node, x, y, recursive)
{
var ch = node.childNodes;
var chl = ch.length-1;
if (chl < 0) {
return null;
}
var chc, subres, ret;
do
{
chc = ch[chl];
ret = qx.dom.ElementFromPoint.getElementFromPointChecker(chc, x, y);
if (ret)
{
if (typeof recursive === "boolean" && recursive == false)
{
return chc;
}
else
{
subres = qx.dom.ElementFromPoint.getElementFromPointHandler(chc, x-ret[0]-qx.dom.Style.getBorderLeft(chc), y-ret[2]-qx.dom.Style.getBorderTop(chc));
return subres ? subres : chc;
}
}
}
while(chl--);
return null;
}
qx.dom.ElementFromPoint.getElementFromPointChecker = function(chc, x, y)
{
var xstart, ystart, xstop, ystop;
if (chc.nodeType != 1) {
return false;
}
xstart = qx.dom.Offset.getLeft(chc);
if (x > xstart)
{
ystart = qx.dom.Offset.getTop(chc);
if (y > ystart)
{
xstop = xstart + chc.offsetWidth;
if (x < xstop)
{
ystop = ystart + chc.offsetHeight;
if (y < ystop)
{
return [ xstart, xstop, ystart, ystop ];
}
}
}
}
return false;
}
qx.dom.ElementFromPoint.getElementAbsolutePointChecker = function(chc, x, y)
{
var xstart, ystart, xstop, ystop;
if (!chc || chc.nodeType != 1) {
return false;
}
xstart = qx.dom.Location.getPageBoxLeft(chc);
if (x > xstart)
{
ystart = qx.dom.Location.getPageBoxTop(chc);
if (y > ystart)
{
xstop = xstart + chc.offsetWidth;
if (x < xstop)
{
ystop = ystart + chc.offsetHeight;
if (y < ystop)
{
return [ xstart, xstop, ystart, ystop ];
}
}
}
}
return false;
}
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