bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/TreeNode.java

   1 package org.simantics.browsing.ui.nattable;\r
   2 \r
   3 import java.util.ArrayList;\r
   4 import java.util.Collection;\r
   5 import java.util.HashSet;\r
   6 import java.util.List;\r
   7 import java.util.Map;\r
   8 import java.util.Set;\r
   9 \r
  10 import org.eclipse.core.runtime.IAdaptable;\r
  11 import org.eclipse.jface.resource.ColorDescriptor;\r
  12 import org.eclipse.jface.resource.FontDescriptor;\r
  13 import org.eclipse.jface.resource.ImageDescriptor;\r
  14 import org.eclipse.nebula.widgets.nattable.style.CellStyleAttributes;\r
  15 import org.eclipse.nebula.widgets.nattable.style.Style;\r
  16 import org.eclipse.swt.graphics.Color;\r
  17 import org.eclipse.swt.graphics.Font;\r
  18 import org.eclipse.swt.graphics.Image;\r
  19 import org.simantics.browsing.ui.BuiltinKeys;\r
  20 import org.simantics.browsing.ui.NodeContext;\r
  21 import org.simantics.browsing.ui.common.internal.GENodeQueryManager;\r
  22 import org.simantics.browsing.ui.content.ImageDecorator;\r
  23 import org.simantics.browsing.ui.content.Imager;\r
  24 import org.simantics.browsing.ui.content.LabelDecorator;\r
  25 import org.simantics.browsing.ui.content.Labeler;\r
  26 import org.simantics.browsing.ui.nattable.NatTableGraphExplorer.GECache2;\r
  27 import org.simantics.browsing.ui.nattable.NatTableGraphExplorer.GeViewerContext;\r
  28 import org.simantics.browsing.ui.swt.ViewerRowReference;\r
  29 import org.simantics.utils.datastructures.BijectionMap;\r
  30 \r
  31 public class TreeNode implements IAdaptable {\r
  32         private static boolean DEBUG = false;\r
  33         \r
  34         private NodeContext context;\r
  35         GENodeQueryManager manager;\r
  36         GeViewerContext explorerContext;\r
  37         \r
  38         TreeNode parent;\r
  39         List<TreeNode> children = new ArrayList<TreeNode>();\r
  40         boolean expanded;\r
  41         \r
  42         public TreeNode(NodeContext context, GeViewerContext explorerContext) {\r
  43                 this.context = context;\r
  44                 this.explorerContext = explorerContext;\r
  45                 this.expanded = false;\r
  46                 manager = new GENodeQueryManager(explorerContext, null, null, ViewerRowReference.create(this));\r
  47                 explorerContext.getContextToNodeMap().add(context, this);\r
  48         }\r
  49         \r
  50         int getDepth() {\r
  51                 if (parent == null)\r
  52                         return 0;\r
  53                 return parent.getDepth() + 1;\r
  54         }\r
  55         \r
  56         int listIndex;\r
  57         \r
  58         public int getListIndex() {\r
  59                 return listIndex;\r
  60         }\r
  61         \r
  62         public void setListIndex(int listIndex) {\r
  63                 this.listIndex = listIndex;\r
  64         }\r
  65         \r
  66         List<TreeNode> getChildren() {\r
  67                 return children;\r
  68         }\r
  69         \r
  70         public TreeNode getParent() {\r
  71                 return parent;\r
  72         }\r
  73         \r
  74         public void setExpanded(boolean expanded) {\r
  75                 this.expanded = expanded;\r
  76         }\r
  77         \r
  78         public boolean isExpanded() {\r
  79                 return expanded;\r
  80         }\r
  81         \r
  82         public NodeContext getContext() {\r
  83                 return context;\r
  84         }\r
  85         \r
  86         private Labeler labeler;\r
  87         private Imager imager;\r
  88         Collection<LabelDecorator> labelDecorators;\r
  89         Collection<ImageDecorator> imageDecorators;\r
  90          \r
  91         Map<String, String> labels;\r
  92         Map<String, String> runtimeLabels;\r
  93         \r
  94         public String getValueString(int column) {\r
  95                 if (column == 0) {\r
  96                         initData();\r
  97                 }\r
  98                 if (labeler != null) {\r
  99                         String key = explorerContext.getGe().getColumns()[column].getKey();\r
 100                         String s = null;\r
 101                         if (runtimeLabels != null)\r
 102                                 s = runtimeLabels.get(key);\r
 103                         if (s == null)\r
 104                                 s = labels.get(key);\r
 105                         if (labelDecorators != null && !labelDecorators.isEmpty()) {\r
 106                                 int index = 0;\r
 107                                 for (LabelDecorator ld : labelDecorators) {\r
 108                                         String ds = ld.decorateLabel(s, key, index);\r
 109                                         if (ds != null)\r
 110                                                 s = ds;\r
 111                                 }\r
 112                         }\r
 113                         return s;\r
 114                 }\r
 115                 return null;\r
 116         }\r
 117         \r
 118         public Image getImage(int column) {\r
 119                 String key = explorerContext.getGe().getColumns()[column].getKey();\r
 120                 if (imager != null) {\r
 121                         Object descOrImage = null;\r
 122                         boolean hasUncachedImages = false;\r
 123 \r
 124                         ImageDescriptor desc = imager.getImage(key);\r
 125                         if (desc != null) {\r
 126                                 int index = 0;\r
 127                                 // Attempt to decorate the label\r
 128                                 if (!imageDecorators.isEmpty()) {\r
 129                                         for (ImageDecorator id : imageDecorators) {\r
 130                                                 ImageDescriptor ds = id.decorateImage(desc, key, index);\r
 131                                                 if (ds != null)\r
 132                                                         desc = ds;\r
 133                                         }\r
 134                                 }\r
 135 \r
 136                                 // Try resolving only cached images here and now\r
 137                                 Object img = explorerContext.getGe().localResourceManager.find(desc);\r
 138                                 if (img == null)\r
 139                                         img = explorerContext.getGe().resourceManager.find(desc);\r
 140 \r
 141                                 descOrImage = img != null ? img : desc;\r
 142                                 hasUncachedImages |= img == null;\r
 143                         }\r
 144 \r
 145                         if (!hasUncachedImages) {\r
 146                                 return (Image) descOrImage;\r
 147                         } else {\r
 148                                 // Schedule loading to another thread to refrain from\r
 149                                 // blocking\r
 150                                 // the UI with database operations.\r
 151                                 explorerContext.getGe().queueImageTask(this, new ImageTask(this, descOrImage));\r
 152                                 return null;\r
 153                         }\r
 154                 } else {\r
 155                         return null;\r
 156                 }\r
 157         }\r
 158         \r
 159         public void getStyle(int column, Style style) {\r
 160                 String key = explorerContext.getGe().getColumns()[column].getKey();\r
 161                 FontDescriptor font = explorerContext.getGe().originalFont;\r
 162                 ColorDescriptor bg = explorerContext.getGe().originalBackground;\r
 163                 ColorDescriptor fg = explorerContext.getGe().originalForeground;\r
 164                 \r
 165                 // Attempt to decorate the label\r
 166                 if (labelDecorators != null && !labelDecorators.isEmpty()) {\r
 167                         int index = 0;\r
 168                         for (LabelDecorator ld : labelDecorators) {\r
 169 \r
 170                                 FontDescriptor dfont = ld.decorateFont(font, key, index);\r
 171                                 if (dfont != null)\r
 172                                         font = dfont;\r
 173 \r
 174                                 ColorDescriptor dbg = ld.decorateBackground(bg, key, index);\r
 175                                 if (dbg != null)\r
 176                                         bg = dbg;\r
 177 \r
 178                                 ColorDescriptor dfg = ld.decorateForeground(fg, key, index);\r
 179                                 if (dfg != null)\r
 180                                         fg = dfg;\r
 181                         }\r
 182                 }\r
 183 \r
 184                 if (font != explorerContext.getGe().originalFont) {\r
 185                         // System.out.println("set font: " + index + ": " +\r
 186                         // font);\r
 187                         style.setAttributeValue(CellStyleAttributes.FONT,(Font) explorerContext.getGe().localResourceManager.get(font));\r
 188                 } else {\r
 189                         style.setAttributeValue(CellStyleAttributes.FONT,(Font) (explorerContext.getGe().originalFont != null ? explorerContext.getGe().localResourceManager.get(explorerContext.getGe().originalFont) : null));\r
 190                 }\r
 191                 if (bg != explorerContext.getGe().originalBackground)\r
 192                         style.setAttributeValue(CellStyleAttributes.BACKGROUND_COLOR,(Color) explorerContext.getGe().localResourceManager.get(bg));\r
 193                 else\r
 194                         style.setAttributeValue(CellStyleAttributes.BACKGROUND_COLOR,(Color) (explorerContext.getGe().originalBackground != null ? explorerContext.getGe().localResourceManager.get(explorerContext.getGe().originalBackground) : null));\r
 195                 if (fg != explorerContext.getGe().originalForeground)\r
 196                         style.setAttributeValue(CellStyleAttributes.FOREGROUND_COLOR,(Color) explorerContext.getGe().localResourceManager.get(fg));\r
 197                 else\r
 198                         style.setAttributeValue(CellStyleAttributes.FOREGROUND_COLOR,(Color) (explorerContext.getGe().originalForeground != null ? explorerContext.getGe().localResourceManager.get(explorerContext.getGe().originalForeground) : null));\r
 199 \r
 200         }\r
 201         \r
 202         private void initData() {\r
 203                 labeler = manager.query(context, BuiltinKeys.SELECTED_LABELER);\r
 204                 imager = manager.query(context, BuiltinKeys.SELECTED_IMAGER);\r
 205                 labelDecorators = manager.query(context, BuiltinKeys.LABEL_DECORATORS);\r
 206                 imageDecorators = manager.query(context, BuiltinKeys.IMAGE_DECORATORS);\r
 207                 \r
 208                 if (labeler != null) {\r
 209                 labels = labeler.getLabels();\r
 210                         runtimeLabels = labeler.getRuntimeLabels();\r
 211         } else {\r
 212                 labels = null;\r
 213                 runtimeLabels = null;\r
 214         }\r
 215         }\r
 216         \r
 217         public TreeNode addChild(NodeContext context, GeViewerContext explorerContext) {\r
 218                 TreeNode child = new TreeNode(context, explorerContext);\r
 219                 child.parent = this;\r
 220                 children.add(child);\r
 221                 if (DEBUG) System.out.println("Add " + this  + " -> " + child);\r
 222                 return child;\r
 223         }\r
 224         \r
 225         public TreeNode addChild(int index, NodeContext context,GeViewerContext explorerContext) {\r
 226                 \r
 227                 TreeNode child = new TreeNode(context, explorerContext);\r
 228                 child.parent = this;\r
 229                 children.add(index,child);\r
 230                 if (DEBUG) System.out.println("Add " + this  + " -> " + child + " at " + index);\r
 231                 return child;\r
 232         }\r
 233         \r
 234         public TreeNode setChild(int index, NodeContext context, GeViewerContext explorerContext) {\r
 235                 \r
 236                 TreeNode child = new TreeNode(context, explorerContext);\r
 237                 child.parent = this;\r
 238                 children.set(index,child);\r
 239                 if (DEBUG) System.out.println("Set " + this  + " -> " + child + " at " + index);\r
 240                 return child;\r
 241         }\r
 242         \r
 243         public void dispose() {\r
 244                 if (parent != null)\r
 245                         parent.children.remove(this);\r
 246                 dispose2();\r
 247         }\r
 248         \r
 249         public void dispose2() {\r
 250                 if (DEBUG)      System.out.println("dispose " + this);\r
 251                 parent = null;\r
 252                 for (TreeNode n : children) {\r
 253                         n.dispose2();\r
 254                 }\r
 255                 clearCache();\r
 256                 children.clear();\r
 257                 explorerContext.getContextToNodeMap().remove(context, this);\r
 258                 context = null;\r
 259                 explorerContext = null;\r
 260                 manager.dispose();\r
 261                 manager = null; \r
 262         }\r
 263         \r
 264         private void clearCache() {\r
 265                 if (explorerContext != null) {\r
 266                         GECache2 cache = explorerContext.cache;\r
 267                         \r
 268                         if (cache != null) {\r
 269                                 cache.dispose(context);\r
 270                         }\r
 271                 }\r
 272         }\r
 273         \r
 274         public boolean updateChildren() {\r
 275                 if (context == null)\r
 276                         throw new IllegalStateException("Node is disposed.");\r
 277                 \r
 278                 NodeContext[] childContexts = manager.query(context, BuiltinKeys.FINAL_CHILDREN);\r
 279                 \r
 280                 if (DEBUG) System.out.println("updateChildren " + childContexts.length + " " + this);\r
 281                 \r
 282                 \r
 283                 boolean modified = false;\r
 284                 synchronized (children) {\r
 285                         \r
 286                         int oldCount = children.size();\r
 287                         BijectionMap<Integer, Integer> indexes = new BijectionMap<Integer, Integer>();\r
 288                         Set<Integer> mapped = new HashSet<Integer>();\r
 289                         boolean reorder = false;\r
 290                         // locate matching pairs form old and new children\r
 291                         for (int i = 0; i < oldCount; i++) {\r
 292                                 NodeContext oldCtx = children.get(i).context;\r
 293                                 for (int j = 0; j <childContexts.length; j++) {\r
 294                                         if (mapped.contains(j))\r
 295                                                 continue;\r
 296                                         if (oldCtx.equals(childContexts[j])) {\r
 297                                                 indexes.map(i, j);\r
 298                                                 mapped.add(j);\r
 299                                                 if (i != j)\r
 300                                                         reorder = true;\r
 301                                                 break;\r
 302                                         }\r
 303                                 }\r
 304                         }\r
 305                         // update children if required\r
 306                         if (childContexts.length != oldCount || reorder || childContexts.length != indexes.size()) {\r
 307                                 modified = true;\r
 308                                 List<TreeNode> oldChildren = new ArrayList<TreeNode>(oldCount);\r
 309                                 oldChildren.addAll(children);\r
 310                                 if (childContexts.length >= oldCount) {\r
 311                         for (int i = 0; i < oldCount; i++) {\r
 312                                 Integer oldIndex = indexes.getLeft(i);\r
 313                                 if (oldIndex == null) {\r
 314                                         setChild(i, childContexts[i], explorerContext);\r
 315                                 } else {\r
 316                                         TreeNode n = oldChildren.get(oldIndex);\r
 317                                         children.set(i, n);\r
 318                                 }\r
 319                                 \r
 320                         }\r
 321                         for (int i = oldCount; i < childContexts.length; i++) {\r
 322                                 addChild(childContexts[i], explorerContext);\r
 323                         }\r
 324                         } else {\r
 325                                 for (int i = 0; i < childContexts.length; i++) {\r
 326                                         Integer oldIndex = indexes.getLeft(i);\r
 327                                 if (oldIndex == null) {\r
 328                                         setChild(i, childContexts[i], explorerContext);\r
 329                                 } else {\r
 330                                         TreeNode n = oldChildren.get(oldIndex);\r
 331                                         children.set(i, n);\r
 332                                 }\r
 333                         }\r
 334                                 for (int i = oldCount -1; i >= childContexts.length; i--) {\r
 335                                         children.remove(i);\r
 336                                 }\r
 337                         }\r
 338                                 for (int i = 0; i < oldChildren.size(); i++) {\r
 339                                         if (!indexes.containsLeft(i)) {\r
 340                                                 oldChildren.get(i).dispose2();\r
 341                                         }\r
 342                                 }\r
 343                                 \r
 344                         }\r
 345                 \r
 346                 }\r
 347                 return modified;\r
 348         }\r
 349         \r
 350         public boolean isDisposed() {\r
 351                 return context == null;\r
 352         }\r
 353         \r
 354         public GENodeQueryManager getManager() {\r
 355                 return manager;\r
 356         }\r
 357         \r
 358         @SuppressWarnings("rawtypes")\r
 359         @Override\r
 360         public Object getAdapter(Class adapter) {\r
 361                 if (adapter == NodeContext.class)\r
 362                         return context;\r
 363                 \r
 364                 return context.getAdapter(adapter);\r
 365         }\r
 366 \r
 367 }\r