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SVG.BBox = function(element) {
var box
/* initialize zero box */
this.x = 0
this.y = 0
this.width = 0
this.height = 0
/* get values if element is given */
if (element) {
try {
/* actual, native bounding box */
box = element.node.getBBox()
} catch(e) {
/* fallback for some browsers */
box = {
x: element.node.clientLeft
, y: element.node.clientTop
, width: element.node.clientWidth
, height: element.node.clientHeight
}
}
/* include translations on x an y */
this.x = box.x + element.trans.x
this.y = box.y + element.trans.y
/* plain width and height */
this.width = box.width * element.trans.scaleX
this.height = box.height * element.trans.scaleY
}
/* add center, right and bottom */
boxProperties(this)
}
//
SVG.extend(SVG.BBox, {
// merge bounding box with another, return a new instance
merge: function(box) {
var b = new SVG.BBox()
/* merge box */
b.x = Math.min(this.x, box.x)
b.y = Math.min(this.y, box.y)
b.width = Math.max(this.x + this.width, box.x + box.width) - b.x
b.height = Math.max(this.y + this.height, box.y + box.height) - b.y
/* add center, right and bottom */
boxProperties(b)
return b
}
})
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