[8084] | 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, 11:43 PM
|
---|
| 35 | */
|
---|
| 36 | package com.kitfox.svg;
|
---|
| 37 |
|
---|
| 38 | import com.kitfox.svg.app.beans.SVGIcon;
|
---|
| 39 | import java.awt.Graphics2D;
|
---|
| 40 | import java.awt.image.BufferedImage;
|
---|
| 41 | import java.beans.PropertyChangeListener;
|
---|
| 42 | import java.beans.PropertyChangeSupport;
|
---|
| 43 | import java.io.BufferedInputStream;
|
---|
| 44 | import java.io.ByteArrayInputStream;
|
---|
| 45 | import java.io.ByteArrayOutputStream;
|
---|
| 46 | import java.io.IOException;
|
---|
| 47 | import java.io.InputStream;
|
---|
| 48 | import java.io.ObjectInputStream;
|
---|
| 49 | import java.io.ObjectOutputStream;
|
---|
| 50 | import java.io.Reader;
|
---|
| 51 | import java.io.Serializable;
|
---|
| 52 | import java.lang.ref.SoftReference;
|
---|
| 53 | import java.net.MalformedURLException;
|
---|
| 54 | import java.net.URI;
|
---|
| 55 | import java.net.URISyntaxException;
|
---|
| 56 | import java.net.URL;
|
---|
| 57 | import java.util.ArrayList;
|
---|
| 58 | import java.util.HashMap;
|
---|
| 59 | import java.util.Iterator;
|
---|
| 60 | import java.util.logging.Level;
|
---|
| 61 | import java.util.logging.Logger;
|
---|
| 62 | import java.util.zip.GZIPInputStream;
|
---|
| 63 | import javax.imageio.ImageIO;
|
---|
[8149] | 64 | import javax.xml.bind.DatatypeConverter;
|
---|
[8084] | 65 | import org.xml.sax.EntityResolver;
|
---|
| 66 | import org.xml.sax.InputSource;
|
---|
| 67 | import org.xml.sax.SAXException;
|
---|
| 68 | import org.xml.sax.SAXParseException;
|
---|
| 69 | import org.xml.sax.XMLReader;
|
---|
| 70 | import org.xml.sax.helpers.XMLReaderFactory;
|
---|
| 71 |
|
---|
| 72 | /**
|
---|
| 73 | * Many SVG files can be loaded at one time. These files will quite likely need
|
---|
| 74 | * to reference one another. The SVG universe provides a container for all these
|
---|
| 75 | * files and the means for them to relate to each other.
|
---|
| 76 | *
|
---|
| 77 | * @author Mark McKay
|
---|
| 78 | * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
|
---|
| 79 | */
|
---|
| 80 | public class SVGUniverse implements Serializable
|
---|
| 81 | {
|
---|
| 82 |
|
---|
| 83 | public static final long serialVersionUID = 0;
|
---|
| 84 | transient private PropertyChangeSupport changes = new PropertyChangeSupport(this);
|
---|
| 85 | /**
|
---|
| 86 | * Maps document URIs to their loaded SVG diagrams. Note that URIs for
|
---|
| 87 | * documents loaded from URLs will reflect their URLs and URIs for documents
|
---|
| 88 | * initiated from streams will have the scheme <i>svgSalamander</i>.
|
---|
| 89 | */
|
---|
| 90 | final HashMap loadedDocs = new HashMap();
|
---|
| 91 | final HashMap loadedFonts = new HashMap();
|
---|
| 92 | final HashMap loadedImages = new HashMap();
|
---|
| 93 | public static final String INPUTSTREAM_SCHEME = "svgSalamander";
|
---|
| 94 | /**
|
---|
| 95 | * Current time in this universe. Used for resolving attributes that are
|
---|
| 96 | * influenced by track information. Time is in milliseconds. Time 0
|
---|
| 97 | * coresponds to the time of 0 in each member diagram.
|
---|
| 98 | */
|
---|
| 99 | protected double curTime = 0.0;
|
---|
| 100 | private boolean verbose = false;
|
---|
| 101 | //Cache reader for efficiency
|
---|
| 102 | XMLReader cachedReader;
|
---|
| 103 |
|
---|
| 104 | /**
|
---|
| 105 | * Creates a new instance of SVGUniverse
|
---|
| 106 | */
|
---|
| 107 | public SVGUniverse()
|
---|
| 108 | {
|
---|
| 109 | }
|
---|
| 110 |
|
---|
| 111 | public void addPropertyChangeListener(PropertyChangeListener l)
|
---|
| 112 | {
|
---|
| 113 | changes.addPropertyChangeListener(l);
|
---|
| 114 | }
|
---|
| 115 |
|
---|
| 116 | public void removePropertyChangeListener(PropertyChangeListener l)
|
---|
| 117 | {
|
---|
| 118 | changes.removePropertyChangeListener(l);
|
---|
| 119 | }
|
---|
| 120 |
|
---|
| 121 | /**
|
---|
| 122 | * Release all loaded SVG document from memory
|
---|
| 123 | */
|
---|
| 124 | public void clear()
|
---|
| 125 | {
|
---|
| 126 | loadedDocs.clear();
|
---|
| 127 | loadedFonts.clear();
|
---|
| 128 | loadedImages.clear();
|
---|
| 129 | }
|
---|
| 130 |
|
---|
| 131 | /**
|
---|
| 132 | * Returns the current animation time in milliseconds.
|
---|
| 133 | */
|
---|
| 134 | public double getCurTime()
|
---|
| 135 | {
|
---|
| 136 | return curTime;
|
---|
| 137 | }
|
---|
| 138 |
|
---|
| 139 | public void setCurTime(double curTime)
|
---|
| 140 | {
|
---|
| 141 | double oldTime = this.curTime;
|
---|
| 142 | this.curTime = curTime;
|
---|
| 143 | changes.firePropertyChange("curTime", new Double(oldTime), new Double(curTime));
|
---|
| 144 | }
|
---|
| 145 |
|
---|
| 146 | /**
|
---|
| 147 | * Updates all time influenced style and presentation attributes in all SVG
|
---|
| 148 | * documents in this universe.
|
---|
| 149 | */
|
---|
| 150 | public void updateTime() throws SVGException
|
---|
| 151 | {
|
---|
| 152 | for (Iterator it = loadedDocs.values().iterator(); it.hasNext();)
|
---|
| 153 | {
|
---|
| 154 | SVGDiagram dia = (SVGDiagram) it.next();
|
---|
| 155 | dia.updateTime(curTime);
|
---|
| 156 | }
|
---|
| 157 | }
|
---|
| 158 |
|
---|
| 159 | /**
|
---|
| 160 | * Called by the Font element to let the universe know that a font has been
|
---|
| 161 | * loaded and is available.
|
---|
| 162 | */
|
---|
| 163 | void registerFont(Font font)
|
---|
| 164 | {
|
---|
| 165 | loadedFonts.put(font.getFontFace().getFontFamily(), font);
|
---|
| 166 | }
|
---|
| 167 |
|
---|
| 168 | public Font getDefaultFont()
|
---|
| 169 | {
|
---|
| 170 | for (Iterator it = loadedFonts.values().iterator(); it.hasNext();)
|
---|
| 171 | {
|
---|
| 172 | return (Font) it.next();
|
---|
| 173 | }
|
---|
| 174 | return null;
|
---|
| 175 | }
|
---|
| 176 |
|
---|
| 177 | public Font getFont(String fontName)
|
---|
| 178 | {
|
---|
| 179 | return (Font) loadedFonts.get(fontName);
|
---|
| 180 | }
|
---|
| 181 |
|
---|
| 182 | URL registerImage(URI imageURI)
|
---|
| 183 | {
|
---|
| 184 | String scheme = imageURI.getScheme();
|
---|
| 185 | if (scheme.equals("data"))
|
---|
| 186 | {
|
---|
| 187 | String path = imageURI.getRawSchemeSpecificPart();
|
---|
| 188 | int idx = path.indexOf(';');
|
---|
| 189 | String mime = path.substring(0, idx);
|
---|
| 190 | String content = path.substring(idx + 1);
|
---|
| 191 |
|
---|
| 192 | if (content.startsWith("base64"))
|
---|
| 193 | {
|
---|
| 194 | try
|
---|
| 195 | {
|
---|
[8149] | 196 | byte[] buf = DatatypeConverter.parseBase64Binary(content.substring(6));
|
---|
[8084] | 197 | ByteArrayInputStream bais = new ByteArrayInputStream(buf);
|
---|
| 198 | BufferedImage img = ImageIO.read(bais);
|
---|
| 199 |
|
---|
| 200 | URL url;
|
---|
| 201 | int urlIdx = 0;
|
---|
| 202 | while (true)
|
---|
| 203 | {
|
---|
| 204 | url = new URL("inlineImage", "localhost", "img" + urlIdx);
|
---|
| 205 | if (!loadedImages.containsKey(url))
|
---|
| 206 | {
|
---|
| 207 | break;
|
---|
| 208 | }
|
---|
| 209 | urlIdx++;
|
---|
| 210 | }
|
---|
| 211 |
|
---|
| 212 | SoftReference ref = new SoftReference(img);
|
---|
| 213 | loadedImages.put(url, ref);
|
---|
| 214 |
|
---|
| 215 | return url;
|
---|
[8149] | 216 | }
|
---|
| 217 | catch (IOException | IllegalArgumentException ex)
|
---|
[8084] | 218 | {
|
---|
| 219 | Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
|
---|
| 220 | "Could not decode inline image", ex);
|
---|
| 221 | }
|
---|
| 222 | }
|
---|
| 223 | return null;
|
---|
| 224 | } else
|
---|
| 225 | {
|
---|
| 226 | try
|
---|
| 227 | {
|
---|
| 228 | URL url = imageURI.toURL();
|
---|
| 229 | registerImage(url);
|
---|
| 230 | return url;
|
---|
| 231 | } catch (MalformedURLException ex)
|
---|
| 232 | {
|
---|
| 233 | Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
|
---|
| 234 | "Bad url", ex);
|
---|
| 235 | }
|
---|
| 236 | return null;
|
---|
| 237 | }
|
---|
| 238 | }
|
---|
| 239 |
|
---|
| 240 | void registerImage(URL imageURL)
|
---|
| 241 | {
|
---|
| 242 | if (loadedImages.containsKey(imageURL))
|
---|
| 243 | {
|
---|
| 244 | return;
|
---|
| 245 | }
|
---|
| 246 |
|
---|
| 247 | SoftReference ref;
|
---|
| 248 | try
|
---|
| 249 | {
|
---|
| 250 | String fileName = imageURL.getFile();
|
---|
| 251 | if (".svg".equals(fileName.substring(fileName.length() - 4).toLowerCase()))
|
---|
| 252 | {
|
---|
| 253 | SVGIcon icon = new SVGIcon();
|
---|
| 254 | icon.setSvgURI(imageURL.toURI());
|
---|
| 255 |
|
---|
| 256 | BufferedImage img = new BufferedImage(icon.getIconWidth(), icon.getIconHeight(), BufferedImage.TYPE_INT_ARGB);
|
---|
| 257 | Graphics2D g = img.createGraphics();
|
---|
| 258 | icon.paintIcon(null, g, 0, 0);
|
---|
| 259 | g.dispose();
|
---|
| 260 | ref = new SoftReference(img);
|
---|
| 261 | } else
|
---|
| 262 | {
|
---|
| 263 | BufferedImage img = ImageIO.read(imageURL);
|
---|
| 264 | ref = new SoftReference(img);
|
---|
| 265 | }
|
---|
| 266 | loadedImages.put(imageURL, ref);
|
---|
| 267 | } catch (Exception e)
|
---|
| 268 | {
|
---|
| 269 | Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
|
---|
| 270 | "Could not load image: " + imageURL, e);
|
---|
| 271 | }
|
---|
| 272 | }
|
---|
| 273 |
|
---|
| 274 | BufferedImage getImage(URL imageURL)
|
---|
| 275 | {
|
---|
| 276 | SoftReference ref = (SoftReference) loadedImages.get(imageURL);
|
---|
| 277 | if (ref == null)
|
---|
| 278 | {
|
---|
| 279 | return null;
|
---|
| 280 | }
|
---|
| 281 |
|
---|
| 282 | BufferedImage img = (BufferedImage) ref.get();
|
---|
| 283 | //If image was cleared from memory, reload it
|
---|
| 284 | if (img == null)
|
---|
| 285 | {
|
---|
| 286 | try
|
---|
| 287 | {
|
---|
| 288 | img = ImageIO.read(imageURL);
|
---|
| 289 | } catch (Exception e)
|
---|
| 290 | {
|
---|
| 291 | Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
|
---|
| 292 | "Could not load image", e);
|
---|
| 293 | }
|
---|
| 294 | ref = new SoftReference(img);
|
---|
| 295 | loadedImages.put(imageURL, ref);
|
---|
| 296 | }
|
---|
| 297 |
|
---|
| 298 | return img;
|
---|
| 299 | }
|
---|
| 300 |
|
---|
| 301 | /**
|
---|
| 302 | * Returns the element of the document at the given URI. If the document is
|
---|
| 303 | * not already loaded, it will be.
|
---|
| 304 | */
|
---|
| 305 | public SVGElement getElement(URI path)
|
---|
| 306 | {
|
---|
| 307 | return getElement(path, true);
|
---|
| 308 | }
|
---|
| 309 |
|
---|
| 310 | public SVGElement getElement(URL path)
|
---|
| 311 | {
|
---|
| 312 | try
|
---|
| 313 | {
|
---|
| 314 | URI uri = new URI(path.toString());
|
---|
| 315 | return getElement(uri, true);
|
---|
| 316 | } catch (Exception e)
|
---|
| 317 | {
|
---|
| 318 | Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
|
---|
| 319 | "Could not parse url " + path, e);
|
---|
| 320 | }
|
---|
| 321 | return null;
|
---|
| 322 | }
|
---|
| 323 |
|
---|
| 324 | /**
|
---|
| 325 | * Looks up a href within our universe. If the href refers to a document
|
---|
| 326 | * that is not loaded, it will be loaded. The URL #target will then be
|
---|
| 327 | * checked against the SVG diagram's index and the coresponding element
|
---|
| 328 | * returned. If there is no coresponding index, null is returned.
|
---|
| 329 | */
|
---|
| 330 | public SVGElement getElement(URI path, boolean loadIfAbsent)
|
---|
| 331 | {
|
---|
| 332 | try
|
---|
| 333 | {
|
---|
| 334 | //Strip fragment from URI
|
---|
| 335 | URI xmlBase = new URI(path.getScheme(), path.getSchemeSpecificPart(), null);
|
---|
| 336 |
|
---|
| 337 | SVGDiagram dia = (SVGDiagram) loadedDocs.get(xmlBase);
|
---|
| 338 | if (dia == null && loadIfAbsent)
|
---|
| 339 | {
|
---|
| 340 | //System.err.println("SVGUnivserse: " + xmlBase.toString());
|
---|
| 341 | //javax.swing.JOptionPane.showMessageDialog(null, xmlBase.toString());
|
---|
| 342 | URL url = xmlBase.toURL();
|
---|
| 343 |
|
---|
| 344 | loadSVG(url, false);
|
---|
| 345 | dia = (SVGDiagram) loadedDocs.get(xmlBase);
|
---|
| 346 | if (dia == null)
|
---|
| 347 | {
|
---|
| 348 | return null;
|
---|
| 349 | }
|
---|
| 350 | }
|
---|
| 351 |
|
---|
| 352 | String fragment = path.getFragment();
|
---|
| 353 | return fragment == null ? dia.getRoot() : dia.getElement(fragment);
|
---|
| 354 | } catch (Exception e)
|
---|
| 355 | {
|
---|
| 356 | Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
|
---|
| 357 | "Could not parse path " + path, e);
|
---|
| 358 | return null;
|
---|
| 359 | }
|
---|
| 360 | }
|
---|
| 361 |
|
---|
| 362 | public SVGDiagram getDiagram(URI xmlBase)
|
---|
| 363 | {
|
---|
| 364 | return getDiagram(xmlBase, true);
|
---|
| 365 | }
|
---|
| 366 |
|
---|
| 367 | /**
|
---|
| 368 | * Returns the diagram that has been loaded from this root. If diagram is
|
---|
| 369 | * not already loaded, returns null.
|
---|
| 370 | */
|
---|
| 371 | public SVGDiagram getDiagram(URI xmlBase, boolean loadIfAbsent)
|
---|
| 372 | {
|
---|
| 373 | if (xmlBase == null)
|
---|
| 374 | {
|
---|
| 375 | return null;
|
---|
| 376 | }
|
---|
| 377 |
|
---|
| 378 | SVGDiagram dia = (SVGDiagram) loadedDocs.get(xmlBase);
|
---|
| 379 | if (dia != null || !loadIfAbsent)
|
---|
| 380 | {
|
---|
| 381 | return dia;
|
---|
| 382 | }
|
---|
| 383 |
|
---|
| 384 | //Load missing diagram
|
---|
| 385 | try
|
---|
| 386 | {
|
---|
| 387 | URL url;
|
---|
| 388 | if ("jar".equals(xmlBase.getScheme()) && xmlBase.getPath() != null && !xmlBase.getPath().contains("!/"))
|
---|
| 389 | {
|
---|
| 390 | //Workaround for resources stored in jars loaded by Webstart.
|
---|
| 391 | //http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6753651
|
---|
| 392 | url = SVGUniverse.class.getResource("xmlBase.getPath()");
|
---|
| 393 | }
|
---|
| 394 | else
|
---|
| 395 | {
|
---|
| 396 | url = xmlBase.toURL();
|
---|
| 397 | }
|
---|
| 398 |
|
---|
| 399 |
|
---|
| 400 | loadSVG(url, false);
|
---|
| 401 | dia = (SVGDiagram) loadedDocs.get(xmlBase);
|
---|
| 402 | return dia;
|
---|
| 403 | } catch (Exception e)
|
---|
| 404 | {
|
---|
| 405 | Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
|
---|
| 406 | "Could not parse", e);
|
---|
| 407 | }
|
---|
| 408 |
|
---|
| 409 | return null;
|
---|
| 410 | }
|
---|
| 411 |
|
---|
| 412 | /**
|
---|
| 413 | * Wraps input stream in a BufferedInputStream. If it is detected that this
|
---|
| 414 | * input stream is GZIPped, also wraps in a GZIPInputStream for inflation.
|
---|
| 415 | *
|
---|
| 416 | * @param is Raw input stream
|
---|
| 417 | * @return Uncompressed stream of SVG data
|
---|
| 418 | * @throws java.io.IOException
|
---|
| 419 | */
|
---|
| 420 | private InputStream createDocumentInputStream(InputStream is) throws IOException
|
---|
| 421 | {
|
---|
| 422 | BufferedInputStream bin = new BufferedInputStream(is);
|
---|
| 423 | bin.mark(2);
|
---|
| 424 | int b0 = bin.read();
|
---|
| 425 | int b1 = bin.read();
|
---|
| 426 | bin.reset();
|
---|
| 427 |
|
---|
| 428 | //Check for gzip magic number
|
---|
| 429 | if ((b1 << 8 | b0) == GZIPInputStream.GZIP_MAGIC)
|
---|
| 430 | {
|
---|
| 431 | GZIPInputStream iis = new GZIPInputStream(bin);
|
---|
| 432 | return iis;
|
---|
| 433 | } else
|
---|
| 434 | {
|
---|
| 435 | //Plain text
|
---|
| 436 | return bin;
|
---|
| 437 | }
|
---|
| 438 | }
|
---|
| 439 |
|
---|
| 440 | public URI loadSVG(URL docRoot)
|
---|
| 441 | {
|
---|
| 442 | return loadSVG(docRoot, false);
|
---|
| 443 | }
|
---|
| 444 |
|
---|
| 445 | /**
|
---|
| 446 | * Loads an SVG file and all the files it references from the URL provided.
|
---|
| 447 | * If a referenced file already exists in the SVG universe, it is not
|
---|
| 448 | * reloaded.
|
---|
| 449 | *
|
---|
| 450 | * @param docRoot - URL to the location where this SVG file can be found.
|
---|
| 451 | * @param forceLoad - if true, ignore cached diagram and reload
|
---|
| 452 | * @return - The URI that refers to the loaded document
|
---|
| 453 | */
|
---|
| 454 | public URI loadSVG(URL docRoot, boolean forceLoad)
|
---|
| 455 | {
|
---|
| 456 | try
|
---|
| 457 | {
|
---|
| 458 | URI uri = new URI(docRoot.toString());
|
---|
| 459 | if (loadedDocs.containsKey(uri) && !forceLoad)
|
---|
| 460 | {
|
---|
| 461 | return uri;
|
---|
| 462 | }
|
---|
| 463 |
|
---|
| 464 | InputStream is = docRoot.openStream();
|
---|
| 465 | return loadSVG(uri, new InputSource(createDocumentInputStream(is)));
|
---|
| 466 | } catch (URISyntaxException ex)
|
---|
| 467 | {
|
---|
| 468 | Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
|
---|
| 469 | "Could not parse", ex);
|
---|
| 470 | } catch (IOException e)
|
---|
| 471 | {
|
---|
| 472 | Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
|
---|
| 473 | "Could not parse", e);
|
---|
| 474 | }
|
---|
| 475 |
|
---|
| 476 | return null;
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 | public URI loadSVG(InputStream is, String name) throws IOException
|
---|
| 480 | {
|
---|
| 481 | return loadSVG(is, name, false);
|
---|
| 482 | }
|
---|
| 483 |
|
---|
| 484 | public URI loadSVG(InputStream is, String name, boolean forceLoad) throws IOException
|
---|
| 485 | {
|
---|
| 486 | URI uri = getStreamBuiltURI(name);
|
---|
| 487 | if (uri == null)
|
---|
| 488 | {
|
---|
| 489 | return null;
|
---|
| 490 | }
|
---|
| 491 | if (loadedDocs.containsKey(uri) && !forceLoad)
|
---|
| 492 | {
|
---|
| 493 | return uri;
|
---|
| 494 | }
|
---|
| 495 |
|
---|
| 496 | return loadSVG(uri, new InputSource(createDocumentInputStream(is)));
|
---|
| 497 | }
|
---|
| 498 |
|
---|
| 499 | public URI loadSVG(Reader reader, String name)
|
---|
| 500 | {
|
---|
| 501 | return loadSVG(reader, name, false);
|
---|
| 502 | }
|
---|
| 503 |
|
---|
| 504 | /**
|
---|
| 505 | * This routine allows you to create SVG documents from data streams that
|
---|
| 506 | * may not necessarily have a URL to load from. Since every SVG document
|
---|
| 507 | * must be identified by a unique URL, Salamander provides a method to fake
|
---|
| 508 | * this for streams by defining it's own protocol - svgSalamander - for SVG
|
---|
| 509 | * documents without a formal URL.
|
---|
| 510 | *
|
---|
| 511 | * @param reader - A stream containing a valid SVG document
|
---|
| 512 | * @param name - <p>A unique name for this document. It will be used to
|
---|
| 513 | * construct a unique URI to refer to this document and perform resolution
|
---|
| 514 | * with relative URIs within this document.</p> <p>For example, a name of
|
---|
| 515 | * "/myScene" will produce the URI svgSalamander:/myScene.
|
---|
| 516 | * "/maps/canada/toronto" will produce svgSalamander:/maps/canada/toronto.
|
---|
| 517 | * If this second document then contained the href "../uk/london", it would
|
---|
| 518 | * resolve by default to svgSalamander:/maps/uk/london. That is, SVG
|
---|
| 519 | * Salamander defines the URI scheme svgSalamander for it's own internal use
|
---|
| 520 | * and uses it for uniquely identfying documents loaded by stream.</p> <p>If
|
---|
| 521 | * you need to link to documents outside of this scheme, you can either
|
---|
| 522 | * supply full hrefs (eg, href="url(http://www.kitfox.com/index.html)") or
|
---|
| 523 | * put the xml:base attribute in a tag to change the defaultbase URIs are
|
---|
| 524 | * resolved against</p> <p>If a name does not start with the character '/',
|
---|
| 525 | * it will be automatically prefixed to it.</p>
|
---|
| 526 | * @param forceLoad - if true, ignore cached diagram and reload
|
---|
| 527 | *
|
---|
| 528 | * @return - The URI that refers to the loaded document
|
---|
| 529 | */
|
---|
| 530 | public URI loadSVG(Reader reader, String name, boolean forceLoad)
|
---|
| 531 | {
|
---|
| 532 | //System.err.println(url.toString());
|
---|
| 533 | //Synthesize URI for this stream
|
---|
| 534 | URI uri = getStreamBuiltURI(name);
|
---|
| 535 | if (uri == null)
|
---|
| 536 | {
|
---|
| 537 | return null;
|
---|
| 538 | }
|
---|
| 539 | if (loadedDocs.containsKey(uri) && !forceLoad)
|
---|
| 540 | {
|
---|
| 541 | return uri;
|
---|
| 542 | }
|
---|
| 543 |
|
---|
| 544 | return loadSVG(uri, new InputSource(reader));
|
---|
| 545 | }
|
---|
| 546 |
|
---|
| 547 | /**
|
---|
| 548 | * Synthesize a URI for an SVGDiagram constructed from a stream.
|
---|
| 549 | *
|
---|
| 550 | * @param name - Name given the document constructed from a stream.
|
---|
| 551 | */
|
---|
| 552 | public URI getStreamBuiltURI(String name)
|
---|
| 553 | {
|
---|
| 554 | if (name == null || name.length() == 0)
|
---|
| 555 | {
|
---|
| 556 | return null;
|
---|
| 557 | }
|
---|
| 558 |
|
---|
| 559 | if (name.charAt(0) != '/')
|
---|
| 560 | {
|
---|
| 561 | name = '/' + name;
|
---|
| 562 | }
|
---|
| 563 |
|
---|
| 564 | try
|
---|
| 565 | {
|
---|
| 566 | //Dummy URL for SVG documents built from image streams
|
---|
| 567 | return new URI(INPUTSTREAM_SCHEME, name, null);
|
---|
| 568 | } catch (Exception e)
|
---|
| 569 | {
|
---|
| 570 | Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
|
---|
| 571 | "Could not parse", e);
|
---|
| 572 | return null;
|
---|
| 573 | }
|
---|
| 574 | }
|
---|
| 575 |
|
---|
| 576 | private XMLReader getXMLReaderCached() throws SAXException
|
---|
| 577 | {
|
---|
| 578 | if (cachedReader == null)
|
---|
| 579 | {
|
---|
| 580 | cachedReader = XMLReaderFactory.createXMLReader();
|
---|
| 581 | }
|
---|
| 582 | return cachedReader;
|
---|
| 583 | }
|
---|
| 584 |
|
---|
| 585 | protected URI loadSVG(URI xmlBase, InputSource is)
|
---|
| 586 | {
|
---|
| 587 | // Use an instance of ourselves as the SAX event handler
|
---|
| 588 | SVGLoader handler = new SVGLoader(xmlBase, this, verbose);
|
---|
| 589 |
|
---|
| 590 | //Place this docment in the universe before it is completely loaded
|
---|
| 591 | // so that the load process can refer to references within it's current
|
---|
| 592 | // document
|
---|
| 593 | loadedDocs.put(xmlBase, handler.getLoadedDiagram());
|
---|
| 594 |
|
---|
| 595 | try
|
---|
| 596 | {
|
---|
| 597 | // Parse the input
|
---|
| 598 | XMLReader reader = getXMLReaderCached();
|
---|
| 599 | reader.setEntityResolver(
|
---|
| 600 | new EntityResolver()
|
---|
| 601 | {
|
---|
| 602 | public InputSource resolveEntity(String publicId, String systemId)
|
---|
| 603 | {
|
---|
| 604 | //Ignore all DTDs
|
---|
| 605 | return new InputSource(new ByteArrayInputStream(new byte[0]));
|
---|
| 606 | }
|
---|
| 607 | });
|
---|
| 608 | reader.setContentHandler(handler);
|
---|
| 609 | reader.parse(is);
|
---|
| 610 |
|
---|
| 611 | handler.getLoadedDiagram().updateTime(curTime);
|
---|
| 612 | return xmlBase;
|
---|
| 613 | } catch (SAXParseException sex)
|
---|
| 614 | {
|
---|
| 615 | System.err.println("Error processing " + xmlBase);
|
---|
| 616 | System.err.println(sex.getMessage());
|
---|
| 617 |
|
---|
| 618 | loadedDocs.remove(xmlBase);
|
---|
| 619 | return null;
|
---|
| 620 | } catch (Throwable e)
|
---|
| 621 | {
|
---|
| 622 | Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
|
---|
| 623 | "Could not load SVG " + xmlBase, e);
|
---|
| 624 | }
|
---|
| 625 |
|
---|
| 626 | return null;
|
---|
| 627 | }
|
---|
| 628 |
|
---|
| 629 | /**
|
---|
| 630 | * Get list of uris of all loaded documents and subdocuments.
|
---|
| 631 | * @return
|
---|
| 632 | */
|
---|
| 633 | public ArrayList getLoadedDocumentURIs()
|
---|
| 634 | {
|
---|
| 635 | return new ArrayList(loadedDocs.keySet());
|
---|
| 636 | }
|
---|
| 637 |
|
---|
| 638 | /**
|
---|
| 639 | * Remove loaded document from cache.
|
---|
| 640 | * @param uri
|
---|
| 641 | */
|
---|
| 642 | public void removeDocument(URI uri)
|
---|
| 643 | {
|
---|
| 644 | loadedDocs.remove(uri);
|
---|
| 645 | }
|
---|
| 646 |
|
---|
| 647 | public boolean isVerbose()
|
---|
| 648 | {
|
---|
| 649 | return verbose;
|
---|
| 650 | }
|
---|
| 651 |
|
---|
| 652 | public void setVerbose(boolean verbose)
|
---|
| 653 | {
|
---|
| 654 | this.verbose = verbose;
|
---|
| 655 | }
|
---|
| 656 |
|
---|
| 657 | /**
|
---|
| 658 | * Uses serialization to duplicate this universe.
|
---|
| 659 | */
|
---|
| 660 | public SVGUniverse duplicate() throws IOException, ClassNotFoundException
|
---|
| 661 | {
|
---|
| 662 | ByteArrayOutputStream bs = new ByteArrayOutputStream();
|
---|
| 663 | ObjectOutputStream os = new ObjectOutputStream(bs);
|
---|
| 664 | os.writeObject(this);
|
---|
| 665 | os.close();
|
---|
| 666 |
|
---|
| 667 | ByteArrayInputStream bin = new ByteArrayInputStream(bs.toByteArray());
|
---|
| 668 | ObjectInputStream is = new ObjectInputStream(bin);
|
---|
| 669 | SVGUniverse universe = (SVGUniverse) is.readObject();
|
---|
| 670 | is.close();
|
---|
| 671 |
|
---|
| 672 | return universe;
|
---|
| 673 | }
|
---|
| 674 | }
|
---|