97 lines
2.8 KiB
JavaScript
97 lines
2.8 KiB
JavaScript
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/**
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* Browser Support module for SVG-edit
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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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BrowserSupport = {};
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var svgns = 'http://www.w3.org/2000/svg';
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var userAgent = navigator.userAgent;
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// Note: Browser sniffing should only be used if no other detection method is possible
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BrowserSupport.isOpera = !!window.opera;
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BrowserSupport.isWebkit = userAgent.indexOf("AppleWebKit") >= 0;
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BrowserSupport.isGecko = userAgent.indexOf('Gecko/') >= 0;
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// segList functions (for FF1.5 and 2.0)
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function getPathReplaceItem() {
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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 getPathInsertItemBefore() {
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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 getTextCharPos() {
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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 getEditableText() {
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// TODO: Find better way to check support for this
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return BrowserSupport.isOpera;
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}
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function getGoodDecimals() {
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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 getNonScalingStroke() {
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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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BrowserSupport.pathReplaceItem = getPathReplaceItem();
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BrowserSupport.pathInsertItemBefore = getPathInsertItemBefore();
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BrowserSupport.textCharPos = getTextCharPos();
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BrowserSupport.editableText = getEditableText();
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BrowserSupport.goodDecimals = getGoodDecimals();
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BrowserSupport.nonScalingStroke = getNonScalingStroke();
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})();
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