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SVG.ViewBox = function(element) {
var width, height
, box = element.bbox()
, view = (element.attr('viewBox') || '').match(/[\d\.]+/g)
/* clone attributes */
this.x = box.x
this.y = box.y
this.width = box.width
this.height = box.height
if (view) {
/* get width and height from viewbox */
width = parseFloat(view[2])
height = parseFloat(view[3])
/* calculate real pixel dimensions on parent SVG.Doc element */
if (element instanceof SVG.Doc) {
this.x = 0
this.y = 0
this.width = element.node.offsetWidth
this.height = element.node.offsetHeight
}
/* calculate zoom accoring to viewbox */
this.zoom = (this.width / this.height > width / height) ?
this.height / height :
this.width / width
} else {
this.zoom = 1
}
}
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