/***
MochiKit.Position 1.4
See <http://mochikit.com/> for documentation, downloads, license, etc.
(c) 2005-2006 Bob Ippolito and others. All rights Reserved.
***/
if (
typeof(dojo) !=
'undefined') {
dojo.provide(
'MochiKit.Position');
dojo.require(
'MochiKit.Base');
dojo.require(
'MochiKit.DOM');
dojo.require(
'MochiKit.Style');
}
if (
typeof(JSAN) !=
'undefined') {
JSAN.use(
'MochiKit.Base', []);
JSAN.use(
'MochiKit.DOM', []);
JSAN.use(
'MochiKit.Style', []);
}
try {
if (
typeof(MochiKit.Base) ==
'undefined' ||
typeof(MochiKit.Style) ==
'undefined' ||
typeof(MochiKit.DOM) ==
'undefined') {
throw '';
}
}
catch (e) {
throw 'MochiKit.Style depends on MochiKit.Base, MochiKit.DOM, and MochiKit.Style!';
}
if (
typeof(MochiKit.Position) ==
'undefined') {
MochiKit.Position = {};
}
MochiKit.Position.NAME =
'MochiKit.Position';
MochiKit.Position.VERSION =
'1.4';
MochiKit.Position.__repr__ =
function () {
return '[' +
this.NAME +
' ' +
this.VERSION +
']';
};
MochiKit.Position.toString =
function () {
return this.__repr__();
};
MochiKit.Position.EXPORT_OK = [];
MochiKit.Position.EXPORT = [
];
MochiKit.Base.update(MochiKit.Position, {
// set to true if needed, warning: firefox performance problems
// NOT neeeded for page scrolling, only if draggable contained in
// scrollable elements
includeScrollOffsets:
false,
/** @id MochiKit.Position.prepare */
prepare:
function () {
var deltaX = window.pageXOffset
|| document.documentElement.scrollLeft
|| document.body.scrollLeft
|| 0;
var deltaY = window.pageYOffset
|| document.documentElement.scrollTop
|| document.body.scrollTop
|| 0;
this.windowOffset =
new MochiKit.Style.Coordinates(deltaX, deltaY);
},
/** @id MochiKit.Position.cumulativeOffset */
cumulativeOffset:
function (element) {
var valueT = 0;
var valueL = 0;
do {
valueT += element.offsetTop || 0;
valueL += element.offsetLeft || 0;
element = element.offsetParent;
}
while (element);
return new MochiKit.Style.Coordinates(valueL, valueT);
},
/** @id MochiKit.Position.realOffset */
realOffset:
function (element) {
var valueT = 0;
var valueL = 0;
do {
valueT += element.scrollTop || 0;
valueL += element.scrollLeft || 0;
element = element.parentNode;
}
while (element);
return new MochiKit.Style.Coordinates(valueL, valueT);
},
/** @id MochiKit.Position.within */
within:
function (element, x, y) {
if (
this.includeScrollOffsets) {
return this.withinIncludingScrolloffsets(element, x, y);
}
this.xcomp = x;
this.ycomp = y;
this.offset =
this.cumulativeOffset(element);
if (element.style.position ==
"fixed") {
this.offset.x +=
this.windowOffset.x;
this.offset.y +=
this.windowOffset.y;
}
return (y >=
this.offset.y &&
y <
this.offset.y + element.offsetHeight &&
x >=
this.offset.x &&
x <
this.offset.x + element.offsetWidth);
},
/** @id MochiKit.Position.withinIncludingScrolloffsets */
withinIncludingScrolloffsets:
function (element, x, y) {
var offsetcache =
this.realOffset(element);
this.xcomp = x + offsetcache.x -
this.windowOffset.x;
this.ycomp = y + offsetcache.y -
this.windowOffset.y;
this.offset =
this.cumulativeOffset(element);
return (
this.ycomp >=
this.offset.y &&
this.ycomp <
this.offset.y + element.offsetHeight &&
this.xcomp >=
this.offset.x &&
this.xcomp <
this.offset.x + element.offsetWidth);
},
// within must be called directly before
/** @id MochiKit.Position.overlap */
overlap:
function (mode, element) {
if (!mode) {
return 0;
}
if (mode ==
'vertical') {
return ((
this.offset.y + element.offsetHeight) -
this.ycomp) /
element.offsetHeight;
}
if (mode ==
'horizontal') {
return ((
this.offset.x + element.offsetWidth) -
this.xcomp) /
element.offsetWidth;
}
},
/** @id MochiKit.Position.absolutize */
absolutize:
function (element) {
element = MochiKit.DOM.getElement(element);
if (element.style.position ==
'absolute') {
return;
}
MochiKit.Position.prepare();
var offsets = MochiKit.Position.positionedOffset(element);
var width = element.clientWidth;
var height = element.clientHeight;
var oldStyle = {
'position': element.style.position,
'left': offsets.x - parseFloat(element.style.left || 0),
'top': offsets.y - parseFloat(element.style.top || 0),
'width': element.style.width,
'height': element.style.height
};
element.style.position =
'absolute';
element.style.top = offsets.y +
'px';
element.style.left = offsets.x +
'px';
element.style.width = width +
'px';
element.style.height = height +
'px';
return oldStyle;
},
/** @id MochiKit.Position.positionedOffset */
positionedOffset:
function (element) {
var valueT = 0, valueL = 0;
do {
valueT += element.offsetTop || 0;
valueL += element.offsetLeft || 0;
element = element.offsetParent;
if (element) {
p = MochiKit.Style.getStyle(element,
'position');
if (p ==
'relative' || p ==
'absolute') {
break;
}
}
}
while (element);
return new MochiKit.Style.Coordinates(valueL, valueT);
},
/** @id MochiKit.Position.relativize */
relativize:
function (element, oldPos) {
element = MochiKit.DOM.getElement(element);
if (element.style.position ==
'relative') {
return;
}
MochiKit.Position.prepare();
var top = parseFloat(element.style.top || 0) -
(oldPos[
'top'] || 0);
var left = parseFloat(element.style.left || 0) -
(oldPos[
'left'] || 0);
element.style.position = oldPos[
'position'];
element.style.top = top +
'px';
element.style.left = left +
'px';
element.style.width = oldPos[
'width'];
element.style.height = oldPos[
'height'];
},
/** @id MochiKit.Position.clone */
clone:
function (source, target) {
source = MochiKit.DOM.getElement(source);
target = MochiKit.DOM.getElement(target);
target.style.position =
'absolute';
var offsets =
this.cumulativeOffset(source);
target.style.top = offsets.y +
'px';
target.style.left = offsets.x +
'px';
target.style.width = source.offsetWidth +
'px';
target.style.height = source.offsetHeight +
'px';
},
/** @id MochiKit.Position.page */
page:
function (forElement) {
var valueT = 0;
var valueL = 0;
var element = forElement;
do {
valueT += element.offsetTop || 0;
valueL += element.offsetLeft || 0;
// Safari fix
if (element.offsetParent == document.body && MochiKit.Style.getStyle(element,
'position') == 'absolute') {
break;
}
} while (element = element.offsetParent);
element = forElement;
do {
valueT -= element.scrollTop || 0;
valueL -= element.scrollLeft || 0;
} while (element = element.parentNode);
return new MochiKit.Style.Coordinates(valueL, valueT);
}
});
MochiKit.Position.__new__ = function (win) {
var m = MochiKit.Base;
this.EXPORT_TAGS = {
':common': this.EXPORT,
':all': m.concat(this.EXPORT, this.EXPORT_OK)
};
m.nameFunctions(this);
};
MochiKit.Position.__new__(this);
