bundles/org.simantics.ui/src/org/simantics/ui/contribution/OpenWithMenuContribution.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.ui.contribution;\r
  13 \r
  14 import java.util.Arrays;\r
  15 import java.util.Comparator;\r
  16 \r
  17 import org.eclipse.jface.action.ContributionItem;\r
  18 import org.eclipse.jface.action.IContributionItem;\r
  19 import org.eclipse.jface.resource.ImageDescriptor;\r
  20 import org.eclipse.jface.resource.JFaceResources;\r
  21 import org.eclipse.jface.resource.LocalResourceManager;\r
  22 import org.eclipse.jface.resource.ResourceManager;\r
  23 import org.eclipse.swt.SWT;\r
  24 import org.eclipse.swt.events.SelectionEvent;\r
  25 import org.eclipse.swt.events.SelectionListener;\r
  26 import org.eclipse.swt.widgets.Menu;\r
  27 import org.eclipse.swt.widgets.MenuItem;\r
  28 import org.simantics.db.ReadGraph;\r
  29 import org.simantics.db.Resource;\r
  30 import org.simantics.db.exception.DatabaseException;\r
  31 import org.simantics.ui.utils.ResourceAdaptionUtils;\r
  32 import org.simantics.ui.workbench.action.ResourceEditorAdapterAction;\r
  33 import org.simantics.ui.workbench.editor.EditorAdapter;\r
  34 import org.simantics.ui.workbench.editor.EditorRegistry;\r
  35 import org.simantics.utils.strings.AlphanumComparator;\r
  36 \r
  37 \r
  38 /**\r
  39  * @author Tuukka Lehtonen\r
  40  */\r
  41 public class OpenWithMenuContribution extends DynamicMenuContribution {\r
  42 \r
  43     private static final boolean DEBUG_ADAPTERS = false;\r
  44 \r
  45     private ResourceManager resourceManager;\r
  46 \r
  47     public OpenWithMenuContribution() {\r
  48         resourceManager = new LocalResourceManager(JFaceResources.getResources());\r
  49     }\r
  50 \r
  51     @Override\r
  52     public void dispose() {\r
  53         if (resourceManager != null) {\r
  54             resourceManager.dispose();\r
  55             resourceManager = null;\r
  56         }\r
  57         super.dispose();\r
  58     }\r
  59 \r
  60     protected Object extractResource(ReadGraph graph, Object object) throws DatabaseException {\r
  61         Resource resource = ResourceAdaptionUtils.adaptToResource(graph, object);\r
  62         if(resource != null) return resource;\r
  63         else return object; \r
  64     }\r
  65     \r
  66     @Override\r
  67     protected boolean preAcceptSelection(Object[] selection) {\r
  68         return selection.length == 1;\r
  69     }\r
  70 \r
  71     @Override\r
  72     protected IContributionItem[] getContributionItems(ReadGraph graph, Object[] selection) throws DatabaseException {\r
  73         final Object r = extractResource(graph, selection[0]);\r
  74         final EditorAdapter[] editorAdapters = EditorRegistry.getInstance().getAdaptersFor(graph, r);\r
  75         if (editorAdapters.length == 0)\r
  76             return NONE;\r
  77 \r
  78         return new IContributionItem[] {\r
  79                 new ContributionItem() {\r
  80                     @Override\r
  81                     public void fill(Menu menu, int index) {\r
  82                         MenuItem openWith = new MenuItem(menu, SWT.CASCADE, index);\r
  83                         openWith.setText("Open With");\r
  84                         openWith.setEnabled(editorAdapters.length > 0);\r
  85                         Menu subMenu = new Menu(menu);\r
  86                         openWith.setMenu(subMenu);\r
  87 \r
  88                         if (editorAdapters.length > 0) {\r
  89                             // Sort the open with actions in descending priority order.\r
  90                             Adapter[] adapters = new Adapter[editorAdapters.length];\r
  91                             for (int i = 0; i < editorAdapters.length; i++)\r
  92                                 adapters[i] = new Adapter(editorAdapters[i], r, true);\r
  93                             Arrays.sort(adapters, new Comparator<Adapter>() {\r
  94                                 @Override\r
  95                                 public int compare(Adapter o1, Adapter o2) {\r
  96                                     int delta = o2.getPriority() - o1.getPriority();\r
  97                                     if (delta != 0)\r
  98                                         return delta;\r
  99                                     return AlphanumComparator.CASE_INSENSITIVE_COMPARATOR.compare(o1.getText(), o2.getText());\r
 100                                 }\r
 101                             });\r
 102 \r
 103                             for (Adapter a : adapters)\r
 104                                 addMenuItem(subMenu, a, r);\r
 105                         }\r
 106                     }\r
 107                 }\r
 108         };\r
 109     }\r
 110 \r
 111     private void addMenuItem(Menu subMenu, Adapter adapter, Object r) {\r
 112         MenuItem item = new MenuItem(subMenu, SWT.PUSH);\r
 113         String text = adapter.getText();\r
 114         if (DEBUG_ADAPTERS) {\r
 115             text = text + " (" + adapter.getAdapter().getClass().getCanonicalName() + ") [" + adapter.getPriority() + "]";\r
 116         }\r
 117         item.setText(text);\r
 118         ImageDescriptor descriptor = adapter.getImageDescriptor();\r
 119         if (descriptor != null) {\r
 120             item.setImage(resourceManager.createImage(descriptor));\r
 121         }\r
 122         item.addSelectionListener(adapter);\r
 123     }\r
 124 \r
 125     static class Adapter extends ResourceEditorAdapterAction implements SelectionListener {\r
 126         boolean remember;\r
 127 \r
 128         public Adapter(EditorAdapter adapter, Object r, boolean remember) {\r
 129             super(adapter, r);\r
 130             this.remember = remember;\r
 131         }\r
 132 \r
 133         @Override\r
 134         public void widgetDefaultSelected(SelectionEvent e) {\r
 135             widgetSelected(e);\r
 136         }\r
 137 \r
 138         @Override\r
 139         public void widgetSelected(SelectionEvent e) {\r
 140             run();\r
 141         }\r
 142 \r
 143         @Override\r
 144         protected void safeRun() throws Exception {\r
 145             super.safeRun();\r
 146 \r
 147             if (remember) {\r
 148                 // Make this choice the default for the next time.\r
 149                 EditorRegistry.getInstance().getMappings().put(getResource(), getAdapter());\r
 150             }\r
 151         }\r
 152     }\r
 153 \r
 154 }\r