bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/SVGNode.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.scenegraph.g2d.nodes;
  13
  14 import java.awt.Graphics2D;
  15 import java.awt.Point;
  16 import java.awt.geom.AffineTransform;
  17 import java.awt.geom.Rectangle2D;
  18 import java.io.ByteArrayInputStream;
  19 import java.io.IOException;
  20 import java.lang.ref.WeakReference;
  21 import java.math.BigInteger;
  22 import java.net.URI;
  23 import java.net.URL;
  24 import java.security.MessageDigest;
  25 import java.security.NoSuchAlgorithmException;
  26 import java.util.ArrayList;
  27 import java.util.HashMap;
  28 import java.util.List;
  29 import java.util.Map;
  30 import java.util.WeakHashMap;
  31
  32 import org.simantics.scenegraph.ExportableWidget.RasterOutputWidget;
  33 import org.simantics.scenegraph.LoaderNode;
  34 import org.simantics.scenegraph.ScenegraphUtils;
  35 import org.simantics.scenegraph.g2d.G2DNode;
  36 import org.simantics.scenegraph.utils.BufferedImage;
  37 import org.simantics.scenegraph.utils.G2DUtils;
  38 import org.simantics.scenegraph.utils.InitValueSupport;
  39 import org.simantics.scenegraph.utils.MipMapBufferedImage;
  40 import org.simantics.scenegraph.utils.MipMapVRamBufferedImage;
  41 import org.simantics.scenegraph.utils.VRamBufferedImage;
  42 import org.simantics.scl.runtime.function.Function1;
  43 import org.simantics.scl.runtime.function.Function2;
  44 import org.simantics.utils.threads.AWTThread;
  45
  46 import com.kitfox.svg.SVGCache;
  47 import com.kitfox.svg.SVGDiagram;
  48 import com.kitfox.svg.SVGElement;
  49 import com.kitfox.svg.SVGException;
  50 import com.kitfox.svg.SVGRoot;
  51 import com.kitfox.svg.SVGUniverse;
  52 import com.kitfox.svg.Text;
  53 import com.kitfox.svg.Tspan;
  54 import com.kitfox.svg.animation.AnimationElement;
  55
  56 @RasterOutputWidget
  57 public class SVGNode extends G2DNode implements InitValueSupport, LoaderNode {
  58
  59         public static class SVGNodeAssignment {
  60                 public String elementId;
  61                 public String attributeNameOrId;
  62                 public String value;
  63                 public SVGNodeAssignment(String elementId, String attributeNameOrId, String value) {
  64                         this.elementId = elementId;
  65                         this.attributeNameOrId = attributeNameOrId;
  66                         this.value = value;
  67                 }
  68                 @Override
  69                 public int hashCode() {
  70                         final int prime = 31;
  71                         int result = 1;
  72                         result = prime * result + ((attributeNameOrId == null) ? 0 : attributeNameOrId.hashCode());
  73                         result = prime * result + ((elementId == null) ? 0 : elementId.hashCode());
  74                         result = prime * result + ((value == null) ? 0 : value.hashCode());
  75                         return result;
  76                 }
  77                 @Override
  78                 public boolean equals(Object obj) {
  79                         if (this == obj)
  80                                 return true;
  81                         if (obj == null)
  82                                 return false;
  83                         if (getClass() != obj.getClass())
  84                                 return false;
  85                         SVGNodeAssignment other = (SVGNodeAssignment) obj;
  86                         if (attributeNameOrId == null) {
  87                                 if (other.attributeNameOrId != null)
  88                                         return false;
  89                         } else if (!attributeNameOrId.equals(other.attributeNameOrId))
  90                                 return false;
  91                         if (elementId == null) {
  92                                 if (other.elementId != null)
  93                                         return false;
  94                         } else if (!elementId.equals(other.elementId))
  95                                 return false;
  96                         if (value == null) {
  97                                 if (other.value != null)
  98                                         return false;
  99                         } else if (!value.equals(other.value))
 100                                 return false;
 101                         return true;
 102                 }
 103         }
 104
 105     private static final long serialVersionUID = 8508750881358776559L;
 106
 107     protected String          data             = null;
 108     protected String          defaultData      = null;
 109     protected Point           targetSize       = null;
 110     protected Boolean         useMipMap        = true;
 111     protected Rectangle2D     bounds           = null;
 112
 113     protected List<SVGNodeAssignment> assignments = new ArrayList<SVGNodeAssignment>();
 114
 115     transient BufferedImage buffer    = null;
 116     transient String documentCache    = null;
 117     transient SVGDiagram diagramCache = null;
 118     transient String dataHash         = null;
 119
 120     static transient Map<String, WeakReference<BufferedImage>> bufferCache = new HashMap<String, WeakReference<BufferedImage>>();
 121
 122     @Override
 123     public void cleanup() {
 124         cleanDiagramCache();
 125     }
 126
 127     public void setAssignments(List<SVGNodeAssignment> ass) {
 128         assignments.clear();
 129         assignments.addAll(ass);
 130     }
 131
 132     public void cleanDiagramCache() {
 133         SVGDiagram d = diagramCache;
 134         if (d != null) {
 135             diagramCache = null;
 136             SVGUniverse univ = SVGCache.getSVGUniverse();
 137             if (univ.decRefCountAndClear(d.getXMLBase()) == 0) {
 138                 // Cleared!
 139                 //System.out.println("cleared: " + d.getXMLBase());
 140             }
 141         }
 142     }
 143
 144     static WeakHashMap<String, String> dataCache = new WeakHashMap<String, String>();
 145
 146     @PropertySetter("SVG")
 147     @SyncField("data")
 148     public void setData(String data) {
 149         String cached = dataCache.get(data);
 150         if (cached == null) {
 151             cached = data;
 152             dataCache.put(data, data);
 153         }
 154         this.data = cached;
 155         this.defaultData = cached;
 156     }
 157
 158     @SyncField("targetSize")
 159     public void setTargetSize(Point p) {
 160         this.targetSize = p; // FIXME: Point doesn't serialize correctly for some reason
 161     }
 162
 163     @SyncField("targetSize")
 164     public void setTargetSize(int x, int y) {
 165         this.targetSize = new Point(x, y); // FIXME: Point doesn't serialize correctly for some reason
 166     }
 167
 168     @SyncField("useMipMap")
 169     public void useMipMap(Boolean use) {
 170         this.useMipMap = use;
 171     }
 172
 173     @PropertySetter("Bounds")
 174     @SyncField("bounds")
 175     public void setBounds(Rectangle2D bounds) {
 176         this.bounds = bounds;
 177     }
 178
 179     @Override
 180     public Rectangle2D getBoundsInLocal() {
 181         if (bounds == null)
 182             parseSVG();
 183         return bounds;
 184     }
 185
 186     @Override
 187     public void render(Graphics2D g2d) {
 188         if (data == null)
 189             return; // Not initialized
 190
 191         if (!data.equals(documentCache) || diagramCache == null || buffer == null)
 192             initBuffer(g2d);
 193
 194         AffineTransform ot = null;
 195         if (!transform.isIdentity()) {
 196             ot = g2d.getTransform();
 197             g2d.transform(transform);
 198         }
 199
 200         if (buffer != null)
 201             buffer.paint(g2d);
 202
 203         if (ot != null)
 204             g2d.setTransform(ot);
 205     }
 206
 207     protected String parseSVG() {
 208         if (data == null)
 209             return null;
 210
 211         SVGUniverse univ = SVGCache.getSVGUniverse();
 212         try {
 213             Rectangle2D bbox = null;
 214             synchronized (univ) {
 215                 // Relinquish reference to current element
 216                 if (diagramCache != null) {
 217                     univ.decRefCount(diagramCache.getXMLBase());
 218                     diagramCache = null;
 219                 }
 220
 221                 // NOTE: hard-coded to assume all SVG data is encoded in UTF-8
 222                 byte[] dataBytes = data.getBytes("UTF-8");
 223                 dataHash = digest(dataBytes, assignments);
 224                 URI uri = univ.loadSVG(new ByteArrayInputStream(dataBytes), dataHash);
 225                 diagramCache = univ.getDiagram(uri, false);
 226
 227                 if (diagramCache != null) {
 228                     univ.incRefCount(diagramCache.getXMLBase());
 229
 230                     if (diagramCache.getRoot() == null) {
 231                         univ.decRefCount(diagramCache.getXMLBase());
 232                         diagramCache = univ.getDiagram(univ.loadSVG(BROKEN_SVG_DATA), false);
 233                         dataHash = "broken";
 234                         univ.incRefCount(diagramCache.getXMLBase());
 235                         bbox = (Rectangle2D) diagramCache.getRoot().getBoundingBox().clone();
 236                     } else {
 237                         bbox = diagramCache.getRoot().getBoundingBox();
 238                         if (bbox.isEmpty()) {
 239                             univ.decRefCount(diagramCache.getXMLBase());
 240                             diagramCache = univ.getDiagram(univ.loadSVG(EMPTY_SVG_DATA), false);
 241                             dataHash = "empty";
 242                             univ.incRefCount(diagramCache.getXMLBase());
 243                             bbox = (Rectangle2D) diagramCache.getRoot().getBoundingBox().clone();
 244                         } else {
 245                             if (applyAssignments(diagramCache, assignments)) {
 246                                 bbox = (Rectangle2D) diagramCache.getRoot().getBoundingBox().clone();
 247                             } else {
 248                                 bbox = (Rectangle2D) bbox.clone();
 249                             }
 250                         }
 251                     }
 252                 } else {
 253                     bbox = new Rectangle2D.Double();
 254                 }
 255             }
 256
 257             documentCache = data;
 258             setBounds(bbox);
 259         } catch (SVGException e) {
 260             // This can only occur if diagramCache != null.
 261             setBounds(diagramCache.getViewRect(new Rectangle2D.Double()));
 262             univ.decRefCount(diagramCache.getXMLBase());
 263             diagramCache = null;
 264         } catch (IOException e) {
 265             diagramCache = null;
 266         }
 267
 268         return dataHash;
 269     }
 270
 271     private static boolean applyAssignments(SVGDiagram diagram, List<SVGNodeAssignment> assignments) throws SVGException {
 272         if (assignments.isEmpty())
 273             return false;
 274         boolean changed = false;
 275         for (SVGNodeAssignment ass : assignments) {
 276             SVGElement e = diagram.getElement(ass.elementId);
 277             if (e != null) {
 278                 if ("$text".equals(ass.attributeNameOrId)) {
 279                     if (e instanceof Tspan) {
 280                         Tspan t = (Tspan) e;
 281                         t.setText(ass.value);
 282                         SVGElement parent = t.getParent();
 283                         if (parent instanceof Text)
 284                             ((Text) parent).rebuild();
 285                         changed = true;
 286                     }
 287                 } else {
 288                     e.setAttribute(ass.attributeNameOrId, AnimationElement.AT_AUTO, ass.value);
 289                     changed = true;
 290                 }
 291             }
 292         }
 293         diagram.updateTime(0);
 294         return changed;
 295     }
 296
 297     public static Rectangle2D getBounds(String data) {
 298         return getBounds(data, null);
 299     }
 300
 301     public static Rectangle2D getBounds(String data, List<SVGNodeAssignment> assignments) {
 302         if (data == null) {
 303             new Exception("null SVG data").printStackTrace();
 304             return null;
 305         }
 306
 307         SVGDiagram diagramCache = null;
 308         try {
 309             // NOTE: hard-coded to assume all SVG data is encoded in UTF-8
 310             byte[] dataBytes = data.getBytes("UTF-8");
 311             String digest = digest(dataBytes, assignments);
 312
 313             SVGUniverse univ = SVGCache.getSVGUniverse();
 314             // TODO: this completely removes any parallel processing from the SVG loading which would be nice to have.
 315             synchronized (univ) {
 316                 //System.out.println(Thread.currentThread() + ": LOADING SVG: " + digest);
 317                 URI uri = univ.loadSVG(new ByteArrayInputStream(dataBytes), digest);
 318                 diagramCache = univ.getDiagram(uri, false);
 319                 if (diagramCache != null) {
 320                     if (diagramCache.getRoot() == null) {
 321                         diagramCache = univ.getDiagram(univ.loadSVG(BROKEN_SVG_DATA));
 322                     } else if (diagramCache.getRoot().getBoundingBox().isEmpty()) {
 323                         diagramCache = univ.getDiagram(univ.loadSVG(EMPTY_SVG_DATA));
 324                     }
 325                 }
 326             }
 327
 328             Rectangle2D rect = null;
 329             if (diagramCache != null) {
 330                 SVGRoot root = diagramCache.getRoot();
 331                 Rectangle2D bbox = root.getBoundingBox();
 332                 rect = (Rectangle2D) bbox.clone();
 333             } else {
 334                 rect = new Rectangle2D.Double();
 335             }
 336             return rect;
 337         } catch (SVGException e) {
 338             return diagramCache.getViewRect(new Rectangle2D.Double());
 339         } catch(IOException e) {
 340         }
 341         return null;
 342     }
 343
 344     public static Rectangle2D getRealBounds(String data) {
 345         return getRealBounds(data, null);
 346     }
 347
 348     public static Rectangle2D getRealBounds(String data, List<SVGNodeAssignment> assignments) {
 349         if (data == null) {
 350             new Exception("null SVG data").printStackTrace();
 351             return null;
 352         }
 353
 354         SVGDiagram diagramCache = null;
 355         try {
 356             // NOTE: hard-coded to assume all SVG data is encoded in UTF-8
 357             byte[] dataBytes = data.getBytes("UTF-8");
 358             String digest = digest(dataBytes, assignments);
 359
 360             SVGUniverse univ = SVGCache.getSVGUniverse();
 361             // TODO: this completely removes any parallel processing from the SVG loading which would be nice to have.
 362             synchronized (univ) {
 363                 //System.out.println(Thread.currentThread() + ": LOADING SVG: " + digest);
 364                 URI uri = univ.loadSVG(new ByteArrayInputStream(dataBytes), digest);
 365                 diagramCache = univ.getDiagram(uri, false);
 366                 if (diagramCache != null) {
 367                     SVGRoot root = diagramCache.getRoot();
 368                     if (root == null) return new Rectangle2D.Double();
 369                     return (Rectangle2D)root.getBoundingBox().clone();
 370                 }
 371             }
 372         } catch (SVGException e) {
 373             return diagramCache.getViewRect(new Rectangle2D.Double());
 374         } catch(IOException e) {
 375         }
 376         return null;
 377     }
 378
 379     protected void initBuffer(Graphics2D g2d) {
 380
 381         if (!data.equals(documentCache) || diagramCache == null) {
 382                 dataHash = parseSVG();
 383                 if (diagramCache == null) {
 384                         System.err.println("UNABLE TO PARSE SVG:\n" + data);
 385                         return;
 386                 }
 387         }
 388
 389         if (buffer != null) {
 390             buffer = null;
 391         }
 392         diagramCache.setIgnoringClipHeuristic(true); // FIXME
 393         if(bufferCache.containsKey(dataHash) && bufferCache.get(dataHash).get() != null) {
 394             buffer = bufferCache.get(dataHash).get();
 395         } else if(diagramCache.getViewRect().getWidth()==0 || diagramCache.getViewRect().getHeight()==0) {
 396             buffer = null;
 397         } else if(useMipMap) {
 398                 if(G2DUtils.isAccelerated(g2d)) {
 399                 buffer = new MipMapVRamBufferedImage(diagramCache, bounds, targetSize);
 400             } else {
 401                 buffer = new MipMapBufferedImage(diagramCache, bounds, targetSize);
 402             }
 403             bufferCache.put(dataHash, new WeakReference<BufferedImage>(buffer));
 404         } else {
 405                 if(G2DUtils.isAccelerated(g2d)) {
 406                 buffer = new VRamBufferedImage(diagramCache, bounds, targetSize);
 407             } else {
 408                 buffer = new BufferedImage(diagramCache, bounds, targetSize);
 409             }
 410             bufferCache.put(dataHash, new WeakReference<BufferedImage>(buffer));
 411         }
 412     }
 413
 414     public void setProperty(String field, Object value) {
 415         if("data".equals(field)) {
 416 //              System.out.println("SVGNode data -> " + value);
 417             this.data = (String)value;
 418         } else if ("z".equals(field)) {
 419 //              System.out.println("SVGNode z -> " + value);
 420             setZIndex((Integer)value);
 421         } else if ("position".equals(field)) {
 422 //              System.out.println("SVGNode position -> " + value);
 423             Point point = (Point)value;
 424             setTransform(AffineTransform.getTranslateInstance(point.x, point.y));
 425 //              setPosition(point.x, point.y);
 426         }
 427     }
 428
 429     @Override
 430     public void initValues() {
 431         data = defaultData;
 432         dataHash = null;
 433         buffer =  null;
 434     }
 435
 436     static WeakHashMap<String, String> digestCache = new WeakHashMap<String, String>();
 437
 438     static String digest(byte[] dataBytes, List<SVGNodeAssignment> assignments) {
 439         try {
 440             MessageDigest md = MessageDigest.getInstance("MD5");
 441             byte[] messageDigest = md.digest(dataBytes);
 442             BigInteger number = new BigInteger(1, messageDigest);
 443             String dataHash = number.toString(16) + (assignments != null ? assignments.hashCode() : 0);
 444             String result = digestCache.get(dataHash);
 445             if(result == null) {
 446                 result = dataHash;
 447                 digestCache.put(dataHash,dataHash);
 448             }
 449             return result;
 450         } catch (NoSuchAlgorithmException e) {
 451             // Shouldn't happen
 452             throw new Error("MD5 digest must exist.");
 453         }
 454     }
 455
 456     static URL BROKEN_SVG_DATA = SVGNode.class.getResource("broken.svg");
 457     static URL EMPTY_SVG_DATA = SVGNode.class.getResource("empty.svg");
 458
 459         @Override
 460         public Function1<Object, Boolean> getPropertyFunction(String propertyName) {
 461                 return ScenegraphUtils.getMethodPropertyFunction(AWTThread.getThreadAccess(), this, propertyName);
 462         }
 463
 464         @Override
 465         public <T> T getProperty(String propertyName) {
 466                 return null;
 467         }
 468
 469         @Override
 470         public void setPropertyCallback(Function2<String, Object, Boolean> callback) {
 471         }
 472
 473         public void synchronizeDocument(String document) {
 474                 setData(document);
 475         }
 476
 477         public void synchronizeTransform(double[] data) {
 478                 this.setTransform(new AffineTransform(data));
 479         }
 480
 481         public String getSVGText() {
 482                 String ret = data.replace("<svg", "<g").replaceAll("svg>", "g>");
 483                 //return diagramCache.toString();
 484                 //return data.replace("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\"><svg xmlns=\"http://www.w3.org/2000/svg\" overflow=\"visible\" version=\"1.1\"", "<g").replaceAll("svg>", "/g>");
 485                 return ret;
 486         }
 487
 488 }