118 lines
3.5 KiB
JavaScript
118 lines
3.5 KiB
JavaScript
/**
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* Package: svgedit.browsersupport
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*
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* Licensed under the Apache License, Version 2
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*
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* Copyright(c) 2010 Jeff Schiller
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* Copyright(c) 2010 Alexis Deveria
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*/
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// Dependencies:
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// 1) jQuery (for $.alert())
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(function() {
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if (!window.svgedit) {
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window.svgedit = {};
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}
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if (!svgedit.browsersupport) {
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svgedit.browsersupport = {};
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}
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var svgns = 'http://www.w3.org/2000/svg';
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var userAgent = navigator.userAgent;
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var svg = document.createElementNS(svgns, 'svg');
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// Note: Browser sniffing should only be used if no other detection method is possible
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var isOpera_ = !!window.opera;
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var isWebkit_ = userAgent.indexOf("AppleWebKit") >= 0;
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var isGecko_ = userAgent.indexOf('Gecko/') >= 0;
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svgedit.browsersupport.isOpera = function() { return isOpera_; }
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svgedit.browsersupport.isWebkit = function() { return isWebkit_; }
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svgedit.browsersupport.isGecko = function() { return isGecko_; }
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// segList functions (for FF1.5 and 2.0)
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function supportPathReplaceItem() {
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var path = document.createElementNS(svgns, 'path');
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path.setAttribute('d','M0,0 10,10');
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var seglist = path.pathSegList;
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var seg = path.createSVGPathSegLinetoAbs(5,5);
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try {
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seglist.replaceItem(seg, 0);
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return true;
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} catch(err) {}
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return false;
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}
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function supportPathInsertItemBefore() {
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var path = document.createElementNS(svgns,'path');
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path.setAttribute('d','M0,0 10,10');
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var seglist = path.pathSegList;
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var seg = path.createSVGPathSegLinetoAbs(5,5);
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try {
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seglist.insertItemBefore(seg, 0);
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return true;
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} catch(err) {}
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return false;
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}
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// text character positioning
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function supportTextCharPos() {
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var retValue = false;
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var svgcontent = document.createElementNS(svgns, 'svg');
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document.documentElement.appendChild(svgcontent);
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try {
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var text = document.createElementNS(svgns,'text');
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text.textContent = 'a';
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svgcontent.appendChild(text);
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text.getStartPositionOfChar(0);
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retValue = true;
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} catch(err) {}
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document.documentElement.removeChild(svgcontent);
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return retValue;
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}
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function supportEditableText() {
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// TODO: Find better way to check support for this
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return svgedit.browsersupport.isOpera();
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}
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function supportGoodDecimals() {
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// Correct decimals on clone attributes (Opera < 10.5/win/non-en)
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var rect = document.createElementNS(svgns, 'rect');
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rect.setAttribute('x',.1);
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var crect = rect.cloneNode(false);
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var retValue = (crect.getAttribute('x').indexOf(',') == -1);
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if(!retValue) {
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$.alert("NOTE: This version of Opera is known to contain bugs in SVG-edit.\n\
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Please upgrade to the <a href='http://opera.com'>latest version</a> in which the problems have been fixed.");
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}
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return retValue;
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}
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function supportNonScalingStroke() {
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var rect = document.createElementNS(svgns, 'rect');
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rect.setAttribute('style','vector-effect:non-scaling-stroke');
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return rect.style.vectorEffect === 'non-scaling-stroke';
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}
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function supportNativeSVGTransformLists() {
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var rect = document.createElementNS(svgns, 'rect');
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var rxform = rect.transform.baseVal;
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var t1 = svg.createSVGTransform();
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rxform.appendItem(t1);
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return rxform.getItem(0) == t1;
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}
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svgedit.browsersupport.pathReplaceItem = supportPathReplaceItem();
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svgedit.browsersupport.pathInsertItemBefore = supportPathInsertItemBefore();
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svgedit.browsersupport.textCharPos = supportTextCharPos();
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svgedit.browsersupport.editableText = supportEditableText();
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svgedit.browsersupport.goodDecimals = supportGoodDecimals();
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svgedit.browsersupport.nonScalingStroke = supportNonScalingStroke();
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svgedit.browsersupport.nativeTransformLists = supportNativeSVGTransformLists();
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})(); |