/*
* SVG Salamander
* Copyright (c) 2004, Mark McKay
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Mark McKay can be contacted at mark@kitfox.com. Salamander and other
* projects can be found at http://www.kitfox.com
*
* Created on February 18, 2004, 5:09 PM
*/
package com.kitfox.svg;
import java.net.URI;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
* @author Mark McKay
* @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
*/
public class SVGLoader extends DefaultHandler {
final HashMap nodeClasses = new HashMap();
// final HashMap attribClasses = new HashMap();
final LinkedList buildStack = new LinkedList();
final HashSet ignoreClasses = new HashSet();
final SVGLoaderHelper helper;
/**
* The diagram that represents the base of this SVG document we're loading.
* Will be augmented to include node indexing info and other useful stuff.
*/
final SVGDiagram diagram;
// SVGElement loadRoot;
// Used to keep track of document elements that are not part of the SVG
// namespace
int skipNonSVGTagDepth = 0;
int indent = 0;
final boolean verbose;
/** Creates a new instance of SVGLoader */
public SVGLoader(URI xmlBase, SVGUniverse universe) {
this(xmlBase, universe, false);
}
public SVGLoader(URI xmlBase, SVGUniverse universe, boolean verbose) {
this.verbose = verbose;
diagram = new SVGDiagram(xmlBase, universe);
// Compile a list of important builder classes
nodeClasses.put("a", A.class);
// nodeClasses.put("animate", Animate.class);
// nodeClasses.put("animatecolor", AnimateColor.class);
// nodeClasses.put("animatemotion", AnimateMotion.class);
// nodeClasses.put("animatetransform", AnimateTransform.class);
nodeClasses.put("circle", Circle.class);
nodeClasses.put("clippath", ClipPath.class);
nodeClasses.put("defs", Defs.class);
nodeClasses.put("desc", Desc.class);
nodeClasses.put("ellipse", Ellipse.class);
nodeClasses.put("filter", Filter.class);
nodeClasses.put("font", Font.class);
nodeClasses.put("font-face", FontFace.class);
nodeClasses.put("g", Group.class);
nodeClasses.put("glyph", Glyph.class);
nodeClasses.put("hkern", Hkern.class);
nodeClasses.put("image", ImageSVG.class);
nodeClasses.put("line", Line.class);
nodeClasses.put("lineargradient", LinearGradient.class);
nodeClasses.put("marker", Marker.class);
nodeClasses.put("metadata", Metadata.class);
nodeClasses.put("missing-glyph", MissingGlyph.class);
nodeClasses.put("path", Path.class);
nodeClasses.put("pattern", PatternSVG.class);
nodeClasses.put("polygon", Polygon.class);
nodeClasses.put("polyline", Polyline.class);
nodeClasses.put("radialgradient", RadialGradient.class);
nodeClasses.put("rect", Rect.class);
// nodeClasses.put("set", SetSmil.class);
nodeClasses.put("shape", ShapeElement.class);
nodeClasses.put("stop", Stop.class);
nodeClasses.put("style", Style.class);
nodeClasses.put("svg", SVGRoot.class);
nodeClasses.put("symbol", Symbol.class);
nodeClasses.put("text", Text.class);
nodeClasses.put("title", Title.class);
nodeClasses.put("tspan", Tspan.class);
nodeClasses.put("use", Use.class);
ignoreClasses.add("midpointstop");
// attribClasses.put("clip-path", StyleUrl.class);
// attribClasses.put("color", StyleColor.class);
helper = new SVGLoaderHelper(xmlBase, universe, diagram);
}
private static String printIndent(int indent, String indentStrn) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < indent; i++) {
sb.append(indentStrn);
}
return sb.toString();
}
@Override
public void startDocument() throws SAXException {
// System.err.println("Start doc");
// buildStack.clear();
}
@Override
public void endDocument() throws SAXException {
// System.err.println("End doc");
}
@Override
public void startElement(String namespaceURI, String sName, String qName,
Attributes attrs) throws SAXException {
if (verbose) {
System.err.println(printIndent(indent, " ")
+ "Starting parse of tag " + sName + ": " + namespaceURI);
}
indent++;
if (skipNonSVGTagDepth != 0 || (!namespaceURI.equals("")
&& !namespaceURI.equals(SVGElement.SVG_NS))) {
skipNonSVGTagDepth++;
return;
}
sName = sName.toLowerCase();
// javax.swing.JOptionPane.showMessageDialog(null, sName);
Object obj = nodeClasses.get(sName);
if (obj == null) {
if (!ignoreClasses.contains(sName)) {
if (verbose) {
System.err.println("SVGLoader: Could not identify tag '"
+ sName + "'");
}
}
return;
}
// Debug info tag depth
// for (int i = 0; i < buildStack.size(); i++) System.err.print(" ");
// System.err.println("+" + sName);
try {
Class cls = (Class) obj;
SVGElement svgEle = (SVGElement) cls.newInstance();
SVGElement parent = null;
if (buildStack.size() != 0) {
parent = (SVGElement) buildStack.getLast();
}
svgEle.loaderStartElement(helper, attrs, parent);
buildStack.addLast(svgEle);
} catch (Exception e) {
Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
"Could not load", e);
throw new SAXException(e);
}
}
@Override
public void endElement(String namespaceURI, String sName, String qName)
throws SAXException {
indent--;
if (verbose) {
System.err.println(printIndent(indent, " ") + "Ending parse of tag "
+ sName + ": " + namespaceURI);
}
if (skipNonSVGTagDepth != 0) {
skipNonSVGTagDepth--;
return;
}
sName = sName.toLowerCase();
Object obj = nodeClasses.get(sName);
if (obj == null) {
return;
}
// Debug info tag depth
// for (int i = 0; i < buildStack.size(); i++) System.err.print(" ");
// System.err.println("-" + sName);
try {
SVGElement svgEle = (SVGElement) buildStack.removeLast();
svgEle.loaderEndElement(helper);
SVGElement parent = null;
if (buildStack.size() != 0) {
parent = (SVGElement) buildStack.getLast();
}
// else loadRoot = (SVGElement)svgEle;
if (parent != null) {
parent.loaderAddChild(helper, svgEle);
} else {
diagram.setRoot((SVGRoot) svgEle);
}
} catch (Exception e) {
Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
"Could not parse", e);
throw new SAXException(e);
}
}
@Override
public void characters(char buf[], int offset, int len)
throws SAXException {
if (skipNonSVGTagDepth != 0) {
return;
}
if (buildStack.size() != 0) {
SVGElement parent = (SVGElement) buildStack.getLast();
String s = new String(buf, offset, len);
parent.loaderAddText(helper, s);
}
}
@Override
public void processingInstruction(String target, String data)
throws SAXException {
// Check for external style sheet
}
// public SVGElement getLoadRoot() { return loadRoot; }
public SVGDiagram getLoadedDiagram() {
return diagram;
}
}