bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/SVGElementClassFactory.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.diagram.adapter;
  13
  14 import java.awt.Point;
  15 import java.awt.geom.Rectangle2D;
  16
  17 import org.simantics.Simantics;
  18 import org.simantics.databoard.Bindings;
  19 import org.simantics.db.AsyncReadGraph;
  20 import org.simantics.db.ReadGraph;
  21 import org.simantics.db.Resource;
  22 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
  23 import org.simantics.db.common.procedure.guarded.GuardedAsyncProcedureWrapper;
  24 import org.simantics.db.common.request.ReadRequest;
  25 import org.simantics.db.common.request.UnaryAsyncRead;
  26 import org.simantics.db.common.utils.NameUtils;
  27 import org.simantics.db.exception.DatabaseException;
  28 import org.simantics.db.procedure.AsyncProcedure;
  29 import org.simantics.diagram.stubs.G2DResource;
  30 import org.simantics.diagram.synchronization.SynchronizationHints;
  31 import org.simantics.diagram.synchronization.graph.TransformSynchronizer;
  32 import org.simantics.g2d.canvas.ICanvasContext;
  33 import org.simantics.g2d.diagram.DiagramHints;
  34 import org.simantics.g2d.diagram.IDiagram;
  35 import org.simantics.g2d.element.ElementClass;
  36 import org.simantics.g2d.element.ElementHints;
  37 import org.simantics.g2d.element.IElement;
  38 import org.simantics.g2d.element.handler.impl.DefaultTransform;
  39 import org.simantics.g2d.element.handler.impl.SimpleElementLayers;
  40 import org.simantics.g2d.element.handler.impl.StaticObjectAdapter;
  41 import org.simantics.g2d.element.handler.impl.StaticSymbolImageInitializer;
  42 import org.simantics.g2d.element.handler.impl.StaticSymbolImpl;
  43 import org.simantics.g2d.element.handler.impl.TextImpl;
  44 import org.simantics.g2d.elementclass.ImageClass.ImageElementHandler;
  45 import org.simantics.g2d.image.DefaultImages;
  46 import org.simantics.g2d.image.Image;
  47 import org.simantics.g2d.image.ProviderUtils;
  48 import org.simantics.g2d.svg.SVGImage;
  49 import org.simantics.scenegraph.g2d.nodes.SVGNode;
  50 import org.simantics.utils.Development;
  51 import org.simantics.utils.datastructures.cache.IFactory;
  52 import org.simantics.utils.datastructures.cache.ProvisionException;
  53 import org.simantics.utils.ui.ErrorLogger;
  54
  55 /**
  56  * An {@link ElementFactory} for DIA.SVGElement instances.
  57  *
  58  * <p>
  59  * Loads element layers, transform and SVG document.
  60  *
  61  * @author Tuukka Lehtonen
  62  */
  63 public class SVGElementClassFactory extends ElementFactoryAdapter {
  64
  65     public static final ElementFactory INSTANCE = new SVGElementClassFactory();
  66
  67     private static final StaticSymbolImpl STATIC_SYMBOL = new StaticSymbolImpl(DefaultImages.SVG.get());
  68
  69     static class ClassRequest extends UnaryAsyncRead<Resource, ElementClass> {
  70
  71         public ClassRequest(Resource elementType) {
  72             super(elementType);
  73         }
  74
  75         @Override
  76         public void perform(AsyncReadGraph graph, AsyncProcedure<ElementClass> procedure) {
  77             createClass(graph, parameter, procedure);
  78         }
  79
  80     }
  81
  82     @Override
  83     public void create(AsyncReadGraph graph, ICanvasContext canvas, IDiagram diagram,
  84             final Resource elementType, final AsyncProcedure<ElementClass> procedure) {
  85
  86         graph.asyncRequest(new ClassRequest(elementType), new TransientCacheAsyncListener<ElementClass>() {
  87
  88             @Override
  89             public void exception(AsyncReadGraph graph, Throwable t) {
  90                 procedure.exception(graph, t);
  91             }
  92
  93             @Override
  94             public void execute(AsyncReadGraph graph, ElementClass result) {
  95                 procedure.execute(graph, result);
  96             }
  97
  98         });
  99
 100     }
 101
 102     static void createClass(AsyncReadGraph graph, final Resource elementType, final AsyncProcedure<ElementClass> procedure) {
 103         String id = "SVGElement: " + elementType.getResourceId();
 104         procedure.execute(graph, ElementClass.compile(
 105                 TextImpl.INSTANCE,
 106                 new StaticObjectAdapter(elementType),
 107                 DefaultTransform.INSTANCE,
 108                 StaticSymbolImageInitializer.INSTANCE,
 109                 STATIC_SYMBOL,
 110                 ImageElementHandler.INSTANCE,
 111                 SimpleElementLayers.INSTANCE)
 112                 .setId(id));
 113     }
 114
 115     @Override
 116     public void load(AsyncReadGraph graph, final ICanvasContext canvas, final IDiagram diagram, final Resource element, final IElement e, final AsyncProcedure<IElement> procedure) {
 117         e.setHint(SynchronizationHints.HINT_SYNCHRONIZER, TransformSynchronizer.INSTANCE);
 118
 119         final GuardedAsyncProcedureWrapper<IElement> guard = new GuardedAsyncProcedureWrapper<IElement>(procedure, 3);
 120
 121         loadSVG(graph, diagram, element, e, guard);
 122         ElementFactoryUtil.loadLayersForElement(graph, diagram, e, element, guard);
 123         ElementFactoryUtil.readTransform(graph, element, e, guard);
 124     }
 125
 126     private void loadSVG(AsyncReadGraph graph, final IDiagram diagram, final Resource element, final IElement e, final AsyncProcedure<IElement> guard) {
 127         G2DResource G2D = graph.getService(G2DResource.class);
 128
 129         graph.forPossibleRelatedValue(element, G2D.HasSVGDocument, Bindings.STRING, new AsyncProcedure<String>() {
 130             @Override
 131             public void exception(AsyncReadGraph graph, Throwable throwable) {
 132                 guard.exception(graph, throwable);
 133             }
 134
 135             @Override
 136             public void execute(AsyncReadGraph graph, final String svgDocument) {
 137                 if (svgDocument != null) {
 138
 139                     if(Development.DEVELOPMENT) {
 140                         Rectangle2D bounds = SVGNode.getRealBounds(svgDocument);
 141                         if(bounds != null && bounds.isEmpty()) {
 142                             Simantics.async(new ReadRequest() {
 143                                 @Override
 144                                 public void run(ReadGraph graph) throws DatabaseException {
 145                                     System.err.println("Graphics for element " + NameUtils.getSafeName(graph, element) + " are empty.");
 146                                 }
 147                             });
 148                         }
 149                     }
 150
 151                     Point referenceSize = diagram.getHint(DiagramHints.KEY_ELEMENT_RASTER_TARGET_SIZE);
 152                     IFactory<Image> img = SVGImage.createFactoryFromString(String.valueOf(element.getResourceId()), svgDocument, referenceSize);
 153                     try {
 154                         img = ProviderUtils.rasterize(img);
 155                         e.setHint(ElementHints.KEY_IMAGE, img.get());
 156                         guard.execute(graph, e);
 157                     } catch (ProvisionException ex) {
 158                         ErrorLogger.defaultLogError(ex);
 159                         e.setHint(ElementHints.KEY_IMAGE, DefaultImages.SVG.get());
 160                         guard.execute(graph, e);
 161                     }
 162                 } else {
 163                     e.setHint(ElementHints.KEY_IMAGE, DefaultImages.UNKNOWN.get());
 164                     guard.execute(graph, e);
 165                 }
 166             }
 167         });
 168     }
 169
 170 }