Source code
Revision control
Copy as Markdown
Other Tools
/***
MochiKit.Position 1.4.2
(c) 2005-2006 Bob Ippolito and others. All rights Reserved.
***/
MochiKit.Base._deps('Position', ['Base', 'DOM', 'Style']);
MochiKit.Position.NAME = 'MochiKit.Position';
MochiKit.Position.VERSION = '1.4.2';
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);
MochiKit.Base._exportSymbols(this, MochiKit.Position);