source: josm/trunk/src/com/kitfox/svg/SVGLoader.java@ 7294

Last change on this file since 7294 was 6002, checked in by Don-vip, 11 years ago

fix #8742 - update svgsalamander to release 0.1.18+patch (fix bug SVGSALAMANDER-26) -> allow to open more SVG files
File size: 9.1 KB
Line 
1/*
2 * SVG Salamander
3 * Copyright (c) 2004, Mark McKay
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or
7 * without modification, are permitted provided that the following
8 * conditions are met:
9 *
10 * - Redistributions of source code must retain the above
11 * copyright notice, this list of conditions and the following
12 * disclaimer.
13 * - Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials
16 * provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Mark McKay can be contacted at mark@kitfox.com. Salamander and other
32 * projects can be found at http://www.kitfox.com
33 *
34 * Created on February 18, 2004, 5:09 PM
35 */
36
37package com.kitfox.svg;
38
39
40import java.util.*;
41import java.net.*;
42import org.xml.sax.*;
43import org.xml.sax.helpers.DefaultHandler;
44
45import java.util.logging.Level;
46import java.util.logging.Logger;
47
48/**
49 * @author Mark McKay
50 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
51 */
52public class SVGLoader extends DefaultHandler
53{
54 final HashMap nodeClasses = new HashMap();
55 //final HashMap attribClasses = new HashMap();
56 final LinkedList buildStack = new LinkedList();
57
58 final HashSet ignoreClasses = new HashSet();
59
60 final SVGLoaderHelper helper;
61
62 /**
63 * The diagram that represents the base of this SVG document we're loading.
64 * Will be augmented to include node indexing info and other useful stuff.
65 */
66 final SVGDiagram diagram;
67
68// SVGElement loadRoot;
69
70 //Used to keep track of document elements that are not part of the SVG namespace
71 int skipNonSVGTagDepth = 0;
72 int indent = 0;
73
74 final boolean verbose;
75
76 /** Creates a new instance of SVGLoader */
77 public SVGLoader(URI xmlBase, SVGUniverse universe)
78 {
79 this(xmlBase, universe, false);
80 }
81
82 public SVGLoader(URI xmlBase, SVGUniverse universe, boolean verbose)
83 {
84 this.verbose = verbose;
85
86 diagram = new SVGDiagram(xmlBase, universe);
87
88 //Compile a list of important builder classes
89 nodeClasses.put("a", A.class);
90 nodeClasses.put("circle", Circle.class);
91 nodeClasses.put("clippath", ClipPath.class);
92 nodeClasses.put("defs", Defs.class);
93 nodeClasses.put("desc", Desc.class);
94 nodeClasses.put("ellipse", Ellipse.class);
95 nodeClasses.put("filter", Filter.class);
96 nodeClasses.put("font", Font.class);
97 nodeClasses.put("font-face", FontFace.class);
98 nodeClasses.put("g", Group.class);
99 nodeClasses.put("glyph", Glyph.class);
100 nodeClasses.put("hkern", Hkern.class);
101 nodeClasses.put("image", ImageSVG.class);
102 nodeClasses.put("line", Line.class);
103 nodeClasses.put("lineargradient", LinearGradient.class);
104 nodeClasses.put("marker", Marker.class);
105 nodeClasses.put("metadata", Metadata.class);
106 nodeClasses.put("missing-glyph", MissingGlyph.class);
107 nodeClasses.put("path", Path.class);
108 nodeClasses.put("pattern", PatternSVG.class);
109 nodeClasses.put("polygon", Polygon.class);
110 nodeClasses.put("polyline", Polyline.class);
111 nodeClasses.put("radialgradient", RadialGradient.class);
112 nodeClasses.put("rect", Rect.class);
113 nodeClasses.put("shape", ShapeElement.class);
114 nodeClasses.put("stop", Stop.class);
115 nodeClasses.put("style", Style.class);
116 nodeClasses.put("svg", SVGRoot.class);
117 nodeClasses.put("symbol", Symbol.class);
118 nodeClasses.put("text", Text.class);
119 nodeClasses.put("title", Title.class);
120 nodeClasses.put("tspan", Tspan.class);
121 nodeClasses.put("use", Use.class);
122
123 ignoreClasses.add("midpointstop");
124
125 //attribClasses.put("clip-path", StyleUrl.class);
126 //attribClasses.put("color", StyleColor.class);
127
128 helper = new SVGLoaderHelper(xmlBase, universe, diagram);
129 }
130
131 private String printIndent(int indent, String indentStrn)
132 {
133 StringBuffer sb = new StringBuffer();
134 for (int i = 0; i < indent; i++)
135 {
136 sb.append(indentStrn);
137 }
138 return sb.toString();
139 }
140
141 public void startDocument() throws SAXException
142 {
143// System.err.println("Start doc");
144
145// buildStack.clear();
146 }
147
148 public void endDocument() throws SAXException
149 {
150// System.err.println("End doc");
151 }
152
153 public void startElement(String namespaceURI, String sName, String qName, Attributes attrs) throws SAXException
154 {
155 if (verbose)
156 {
157 System.err.println(printIndent(indent, " ") + "Starting parse of tag " + sName+ ": " + namespaceURI);
158 }
159 indent++;
160
161 if (skipNonSVGTagDepth != 0 || (!namespaceURI.equals("") && !namespaceURI.equals(SVGElement.SVG_NS)))
162 {
163 skipNonSVGTagDepth++;
164 return;
165 }
166
167 sName = sName.toLowerCase();
168
169//javax.swing.JOptionPane.showMessageDialog(null, sName);
170
171 Object obj = nodeClasses.get(sName);
172 if (obj == null)
173 {
174 if (!ignoreClasses.contains(sName))
175 {
176 if (verbose)
177 {
178 System.err.println("SVGLoader: Could not identify tag '" + sName + "'");
179 }
180 }
181 return;
182 }
183
184//Debug info tag depth
185//for (int i = 0; i < buildStack.size(); i++) System.err.print(" ");
186//System.err.println("+" + sName);
187
188 try {
189 Class cls = (Class)obj;
190 SVGElement svgEle = (SVGElement)cls.newInstance();
191
192 SVGElement parent = null;
193 if (buildStack.size() != 0) parent = (SVGElement)buildStack.getLast();
194 svgEle.loaderStartElement(helper, attrs, parent);
195
196 buildStack.addLast(svgEle);
197 }
198 catch (Exception e)
199 {
200 Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
201 "Could not load", e);
202 throw new SAXException(e);
203 }
204
205 }
206
207 public void endElement(String namespaceURI, String sName, String qName)
208 throws SAXException
209 {
210 indent--;
211 if (verbose)
212 {
213 System.err.println(printIndent(indent, " ") + "Ending parse of tag " + sName+ ": " + namespaceURI);
214 }
215
216 if (skipNonSVGTagDepth != 0)
217 {
218 skipNonSVGTagDepth--;
219 return;
220 }
221
222 sName = sName.toLowerCase();
223
224 Object obj = nodeClasses.get(sName);
225 if (obj == null) return;
226
227//Debug info tag depth
228//for (int i = 0; i < buildStack.size(); i++) System.err.print(" ");
229//System.err.println("-" + sName);
230
231 try {
232 SVGElement svgEle = (SVGElement)buildStack.removeLast();
233
234 svgEle.loaderEndElement(helper);
235
236 SVGElement parent = null;
237 if (buildStack.size() != 0)
238 {
239 parent = (SVGElement)buildStack.getLast();
240 }
241 //else loadRoot = (SVGElement)svgEle;
242
243 if (parent != null)
244 {
245 parent.loaderAddChild(helper, svgEle);
246 }
247 else
248 {
249 diagram.setRoot((SVGRoot)svgEle);
250 }
251
252 }
253 catch (Exception e)
254 {
255 Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
256 "Could not parse", e);
257 throw new SAXException(e);
258 }
259 }
260
261 public void characters(char buf[], int offset, int len)
262 throws SAXException
263 {
264 if (skipNonSVGTagDepth != 0)
265 {
266 return;
267 }
268
269 if (buildStack.size() != 0)
270 {
271 SVGElement parent = (SVGElement)buildStack.getLast();
272 String s = new String(buf, offset, len);
273 parent.loaderAddText(helper, s);
274 }
275 }
276
277 public void processingInstruction(String target, String data)
278 throws SAXException
279 {
280 //Check for external style sheet
281 }
282
283// public SVGElement getLoadRoot() { return loadRoot; }
284 public SVGDiagram getLoadedDiagram() { return diagram; }
285}
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