127 lines
3.2 KiB
JavaScript
127 lines
3.2 KiB
JavaScript
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SVG.ViewBox = SVG.invent({
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create: function(source) {
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var i, base = [0, 0, 0, 0]
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var x, y, width, height, box, view, we, he
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, wm = 1 // width multiplier
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, hm = 1 // height multiplier
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, reg = /[+-]?(?:\d+(?:\.\d*)?|\.\d+)(?:e[+-]?\d+)?/gi
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if(source instanceof SVG.Element){
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we = source
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he = source
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view = (source.attr('viewBox') || '').match(reg)
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box = source.bbox
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// get dimensions of current node
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width = new SVG.Number(source.width())
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height = new SVG.Number(source.height())
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// find nearest non-percentual dimensions
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while (width.unit == '%') {
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wm *= width.value
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width = new SVG.Number(we instanceof SVG.Doc ? we.parent().offsetWidth : we.parent().width())
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we = we.parent()
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}
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while (height.unit == '%') {
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hm *= height.value
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height = new SVG.Number(he instanceof SVG.Doc ? he.parent().offsetHeight : he.parent().height())
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he = he.parent()
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}
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// ensure defaults
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this.x = 0
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this.y = 0
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this.width = width * wm
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this.height = height * hm
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this.zoom = 1
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if (view) {
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// get width and height from viewbox
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x = parseFloat(view[0])
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y = parseFloat(view[1])
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width = parseFloat(view[2])
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height = parseFloat(view[3])
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// calculate zoom accoring to viewbox
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this.zoom = ((this.width / this.height) > (width / height)) ?
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this.height / height :
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this.width / width
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// calculate real pixel dimensions on parent SVG.Doc element
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this.x = x
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this.y = y
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this.width = width
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this.height = height
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}
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}else{
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// ensure source as object
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source = typeof source === 'string' ?
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source.match(reg).map(function(el){ return parseFloat(el) }) :
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Array.isArray(source) ?
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source :
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typeof source == 'object' ?
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[source.x, source.y, source.width, source.height] :
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arguments.length == 4 ?
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[].slice.call(arguments) :
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base
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this.x = source[0]
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this.y = source[1]
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this.width = source[2]
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this.height = source[3]
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}
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}
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, extend: {
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toString: function() {
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return this.x + ' ' + this.y + ' ' + this.width + ' ' + this.height
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}
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, morph: function(x, y, width, height){
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this.destination = new SVG.ViewBox(x, y, width, height)
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return this
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}
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, at: function(pos) {
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if(!this.destination) return this
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return new SVG.ViewBox([
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this.x + (this.destination.x - this.x) * pos
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, this.y + (this.destination.y - this.y) * pos
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, this.width + (this.destination.width - this.width) * pos
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, this.height + (this.destination.height - this.height) * pos
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])
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}
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}
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// Define parent
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, parent: SVG.Container
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// Add parent method
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, construct: {
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// get/set viewbox
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viewbox: function(x, y, width, height) {
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if (arguments.length == 0)
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// act as a getter if there are no arguments
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return new SVG.ViewBox(this)
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// otherwise act as a setter
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return this.attr('viewBox', new SVG.ViewBox(x, y, width, height))
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}
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}
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}) |