bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/DefaultLabelDecoratorsProcessor.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.browsing.ui.swt;
  13
  14 import java.util.ArrayList;
  15 import java.util.Collection;
  16 import java.util.Collections;
  17
  18 import org.eclipse.swt.SWT;
  19 import org.simantics.browsing.ui.BuiltinKeys;
  20 import org.simantics.browsing.ui.BuiltinKeys.LabelDecoratorKey;
  21 import org.simantics.browsing.ui.NodeContext;
  22 import org.simantics.browsing.ui.NodeContext.QueryKey;
  23 import org.simantics.browsing.ui.NodeQueryManager;
  24 import org.simantics.browsing.ui.common.processors.AbstractNodeQueryProcessor;
  25 import org.simantics.browsing.ui.content.LabelDecorator;
  26 import org.simantics.browsing.ui.content.LabelDecoratorFactory;
  27
  28 public class DefaultLabelDecoratorsProcessor extends AbstractNodeQueryProcessor<Collection<LabelDecorator>> {
  29
  30     @Override
  31     public Collection<LabelDecorator> query(NodeQueryManager manager, NodeContext context) {
  32         Collection<LabelDecoratorFactory> factories = manager.query(context, BuiltinKeys.SELECTED_LABEL_DECORATOR_FACTORIES);
  33         if (factories.isEmpty()) {
  34             LabelDecorator truncation = new TreeTruncationDecoratorFactory(SWT.BOLD).create(manager, context);
  35             if (truncation != null)
  36                 return Collections.singletonList(truncation);
  37             return Collections.emptyList();
  38         }
  39
  40         Collection<LabelDecorator> decorators = new ArrayList<LabelDecorator>(factories.size() + 1);
  41         for (LabelDecoratorFactory f : factories) {
  42             assert f != null;
  43             LabelDecorator decorator = manager.query(context, new LabelDecoratorKey(f));
  44             if (decorator != null)
  45                 decorators.add(decorator);
  46         }
  47
  48         LabelDecorator truncation = new TreeTruncationDecoratorFactory(SWT.BOLD).create(manager, context);
  49         if (truncation != null)
  50             decorators.add(truncation);
  51
  52         return decorators;
  53     }
  54
  55     @Override
  56     public String toString() {
  57         return "LabelDecoratorsProcessor";
  58     }
  59
  60     @Override
  61     public QueryKey<Collection<LabelDecorator>> getIdentifier() {
  62         return BuiltinKeys.LABEL_DECORATORS;
  63     }
  64
  65 }