/**********************************************
* Copyright (C) 2010 Lukas Laag
* This file is part of lib-gwt-svg.
*
* libgwtsvg is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* libgwtsvg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libgwtsvg. If not, see http://www.gnu.org/licenses/
**********************************************/
package org.vectomatic.dom.svg.impl;
import java.util.Stack;
import org.vectomatic.dom.svg.OMSVGAnimatedString;
import org.vectomatic.dom.svg.OMSVGStyle;
import org.vectomatic.dom.svg.utils.DOMHelper;
import org.vectomatic.dom.svg.utils.ParserException;
import org.vectomatic.dom.svg.utils.SVGConstants;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.Node;
import com.google.gwt.dom.client.NodeList;
import com.google.gwt.dom.client.Text;
import com.google.gwt.regexp.shared.MatchResult;
import com.google.gwt.regexp.shared.RegExp;
/**
* Internal class to wrap DOM parser implementations for opera
* @author laaglu
*/
public class SVGParserImplOpera extends SVGParserImpl {
private static final String URL = "^url\\((['\"])?[^#\\)]*#([^'\"\\)]*)\\1\\)$";
private static final RegExp URLExp = RegExp.compile(URL, "g");
private static String getRef(String expr) {
URLExp.setLastIndex(0);
MatchResult result = URLExp.exec(expr);
if (result != null && result.getGroupCount() == 3) {
return result.getGroup(2);
}
return null;
}
/**
* Parses the supplied SVG text into a document
* @param rawSvg
* raw xml to be parsed
* @return
* the document resulting from the parse
*/
public final SVGSVGElement parse(String rawSvg) throws ParserException {
SVGDocument doc = parseFromString(rawSvg, "text/xml").cast();
Element elt = doc.getDocumentElement();
if ("parsererror".equals(DOMHelper.getLocalName(elt))) {
String message = "Parsing error";
if (elt.getFirstChild() != null) {
message = elt.getFirstChild().<Text>cast().getData();
}
throw new ParserException(ParserException.Type.NotWellFormed, message);
}
SVGSVGElement svg = DOMHelper.importNode(DOMHelper.getCurrentDocument(), elt, true).cast();
operaFix(svg);
return svg;
}
/**
* Fix for opera.
* SVG Objects created by the parser and imported do not seem to recognize their
* CSS attributes. Reapplying them seems to solve the issue.
* The CSS style attributes which contain hrefs to svg elements are corrupted an
* need to be fixed as well.
* @param root
*/
private static void operaFix(Element root) {
Stack<Element> stack = new Stack<Element>();
stack.push(root);
while(!stack.empty()) {
Element element = stack.pop();
if (SVGConstants.SVG_NAMESPACE_URI.equals(DOMHelper.getNamespaceURI(element))) {
OMSVGAnimatedString cn = element.<SVGElement>cast().getClassName_();
if (cn != null) {
String value = cn.getBaseVal();
if (value != null && value.length() > 0) {
cn.setBaseVal(value);
}
}
if (element.hasAttribute(SVGConstants.SVG_STYLE_ATTRIBUTE)) {
element.setAttribute(SVGConstants.SVG_STYLE_ATTRIBUTE, element.getAttribute(SVGConstants.SVG_STYLE_ATTRIBUTE));
OMSVGStyle style = element.getStyle().<OMSVGStyle>cast();
fixProperty(style, SVGConstants.CSS_FILL_PROPERTY);
fixProperty(style, SVGConstants.CSS_STROKE_PROPERTY);
}
}
NodeList<Node> childNodes = element.getChildNodes();
for (int i = 0, length = childNodes.getLength(); i < length; i++) {
Node node = childNodes.getItem(i);
if (node.getNodeType() == Node.ELEMENT_NODE) {
stack.push(node.<Element>cast());
}
}
}
}
private static void fixProperty(OMSVGStyle style, String propertyName) {
String propertyValue = style.getSVGProperty(propertyName);
if (propertyValue != null && propertyValue.length() > 0) {
String ref = getRef(propertyValue);
if (ref != null) {
String url = "url('#" + ref + "')";
style.setSVGProperty(propertyName, url);
}
}
}
}