bundles/org.simantics.ui/src/org/simantics/ui/workbench/PerspectiveContextActivator.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.workbench;\r
  13 \r
  14 import java.util.List;\r
  15 \r
  16 import org.eclipse.ui.IPerspectiveDescriptor;\r
  17 import org.eclipse.ui.IPerspectiveListener4;\r
  18 import org.eclipse.ui.IWindowListener;\r
  19 import org.eclipse.ui.IWorkbenchPage;\r
  20 import org.eclipse.ui.IWorkbenchPartReference;\r
  21 import org.eclipse.ui.IWorkbenchWindow;\r
  22 import org.eclipse.ui.PlatformUI;\r
  23 import org.eclipse.ui.contexts.IContextActivation;\r
  24 import org.eclipse.ui.contexts.IContextService;\r
  25 import org.simantics.utils.datastructures.MapList;\r
  26 \r
  27 /**\r
  28  * @author Tuukka Lehtonen\r
  29  */\r
  30 public class PerspectiveContextActivator implements IPerspectiveListener4, IWindowListener {\r
  31 \r
  32     private IWorkbenchWindow                    activeWindow;\r
  33 \r
  34     private String                              oldPerspective;\r
  35 \r
  36     private MapList<String, IContextActivation> activations = new MapList<String, IContextActivation>();\r
  37 \r
  38 \r
  39     public PerspectiveContextActivator() {\r
  40         PlatformUI.getWorkbench().addWindowListener(this);\r
  41     }\r
  42 \r
  43     public void dispose() {\r
  44         PlatformUI.getWorkbench().removeWindowListener(this);\r
  45     }\r
  46 \r
  47     //------------------------------------------------------------------------\r
  48     // IPerspectiveListener4\r
  49     //------------------------------------------------------------------------\r
  50 \r
  51     @Override\r
  52     public void perspectivePreDeactivate(IWorkbenchPage page, IPerspectiveDescriptor perspective) {\r
  53     }\r
  54 \r
  55     @Override\r
  56     public void perspectiveClosed(IWorkbenchPage page, IPerspectiveDescriptor perspective) {\r
  57     }\r
  58 \r
  59     @Override\r
  60     public void perspectiveDeactivated(IWorkbenchPage page, IPerspectiveDescriptor perspective) {\r
  61     }\r
  62 \r
  63     @Override\r
  64     public void perspectiveOpened(IWorkbenchPage page, IPerspectiveDescriptor perspective) {\r
  65     }\r
  66 \r
  67     @Override\r
  68     public void perspectiveSavedAs(IWorkbenchPage page, IPerspectiveDescriptor oldPerspective,\r
  69             IPerspectiveDescriptor newPerspective) {\r
  70     }\r
  71 \r
  72     @Override\r
  73     public void perspectiveChanged(IWorkbenchPage page, IPerspectiveDescriptor perspective,\r
  74             IWorkbenchPartReference partRef, String changeId) {\r
  75         // See IWorkbenchPage.CHANGED_* constants for change id's.\r
  76     }\r
  77 \r
  78     @Override\r
  79     public void perspectiveActivated(IWorkbenchPage page, IPerspectiveDescriptor perspective) {\r
  80         activatePerspective(perspective.getId());\r
  81     }\r
  82 \r
  83     @Override\r
  84     public void perspectiveChanged(IWorkbenchPage page, IPerspectiveDescriptor perspective, String changeId) {\r
  85         // See IWorkbenchPage.CHANGED_* constants for change id's.\r
  86     }\r
  87 \r
  88     //------------------------------------------------------------------------\r
  89     // IWindowListener\r
  90     //------------------------------------------------------------------------\r
  91 \r
  92     @Override\r
  93     public void windowActivated(IWorkbenchWindow window) {\r
  94 //        System.out.println("attaching to window: " + window);\r
  95         attachToWindow(window);\r
  96     }\r
  97 \r
  98     @Override\r
  99     public void windowClosed(IWorkbenchWindow window) {\r
 100     }\r
 101 \r
 102     @Override\r
 103     public void windowDeactivated(IWorkbenchWindow window) {\r
 104 //        System.out.println("detaching from window: " + window);\r
 105         detachFromWindow(window);\r
 106     }\r
 107 \r
 108     @Override\r
 109     public void windowOpened(IWorkbenchWindow window) {\r
 110     }\r
 111 \r
 112     //------------------------------------------------------------------------\r
 113     // UTILITIES\r
 114     //------------------------------------------------------------------------\r
 115 \r
 116     private void attachToWindow(IWorkbenchWindow window) {\r
 117         activeWindow = window;\r
 118         window.addPerspectiveListener(this);\r
 119         IPerspectiveDescriptor perspective = window.getActivePage().getPerspective();\r
 120         if (perspective != null) {\r
 121             activatePerspective(perspective.getId());\r
 122         }\r
 123     }\r
 124 \r
 125     private void detachFromWindow(IWorkbenchWindow window) {\r
 126         window.removePerspectiveListener(this);\r
 127     }\r
 128 \r
 129     private IContextService getService(IWorkbenchWindow window) {\r
 130         return (IContextService) window.getWorkbench().getService(IContextService.class);\r
 131         //return (IContextService) window.getService(IContextService.class);\r
 132     }\r
 133 \r
 134     private IContextActivation activate(String ctx) {\r
 135         IContextService contextService = getService(activeWindow);\r
 136         if (contextService != null && ctx != null) {\r
 137             IContextActivation act = contextService.activateContext(ctx);\r
 138 //            System.out.println("activating context: " + act);\r
 139             return act;\r
 140         }\r
 141         return null;\r
 142     }\r
 143 \r
 144     private void deactivate(IContextActivation activation) {\r
 145         IContextService contextService = getService(activeWindow);\r
 146         if (contextService != null && activation != null) {\r
 147 //            System.out.println("deactivating context: " + activation);\r
 148             contextService.deactivateContext(activation);\r
 149         }\r
 150     }\r
 151 \r
 152     private void activatePerspective(String perspectiveId) {\r
 153 //        System.out.println("activating perspective: " + perspectiveId + " (old=" + oldPerspective + ")");\r
 154 \r
 155         if (oldPerspective != null) {\r
 156             if (oldPerspective.equals(perspectiveId))\r
 157                 return;\r
 158 \r
 159             List<IContextActivation> acts = activations.getValues(oldPerspective);\r
 160             if (acts != null) {\r
 161                 activations.remove(oldPerspective);\r
 162                 for (IContextActivation act : acts) {\r
 163                     deactivate(act);\r
 164                 }\r
 165             }\r
 166         }\r
 167         List<IPerspectiveContextExtension> exts = PerspectiveContextBindingManager.getInstance().getExtensions(perspectiveId);\r
 168         for (IPerspectiveContextExtension ext : exts) {\r
 169             for (String ctx : ext.getContextIds()) {\r
 170                 IContextActivation activation = activate(ctx);\r
 171                 if (activation != null) {\r
 172                     activations.add(perspectiveId, activation);\r
 173                 }\r
 174             }\r
 175         }\r
 176         oldPerspective = perspectiveId;\r
 177     }\r
 178 \r
 179 }\r