mirror of
https://github.com/scratchfoundation/paper.js.git
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49 lines
1.2 KiB
JavaScript
49 lines
1.2 KiB
JavaScript
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/*
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* Paper.js
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*
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* This file is part of Paper.js, a JavaScript Vector Graphics Library,
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* based on Scriptographer.org and designed to be largely API compatible.
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* http://paperjs.org/
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* http://scriptographer.org/
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*
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* Distributed under the MIT license. See LICENSE file for details.
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*
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* Copyright (c) 2011, Juerg Lehni & Jonathan Puckey
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* http://lehni.org/ & http://jonathanpuckey.com/
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*
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* All rights reserved.
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*/
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var Element = {
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getOffset: function(el) {
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var x = 0, y = 0;
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while (el) {
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x += el.offsetLeft;
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y += el.offsetTop;
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el = el.offsetParent;
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}
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return Point.create(x, y);
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},
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getSize: function(el) {
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return Size.create(el.offsetWidth, el.offsetHeight);
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},
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getBounds: function(el) {
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return new Rectangle(Element.getOffset(el), Element.getSize(el));
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},
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// Checks if element is visibile in current viewport
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isVisible: function(el) {
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var doc = document.getElementsByTagName(
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document.compatMode == 'CSS1Compat' ? 'html' : 'body')[0];
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// See if the two rectangle intersect
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return Rectangle.create(
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window.pageXOffset || doc.scrollLeft,
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window.pageYOffset || doc.scrollTop,
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window.innerWidth || doc.clientWidth,
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window.innerHeight || doc.clientHeight
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).intersects(Element.getBounds(el));
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}
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};
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