--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2011 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.browsing.ui.graph.impl;\r
+\r
+import org.eclipse.jface.viewers.ISelection;\r
+import org.eclipse.ui.ISelectionListener;\r
+import org.eclipse.ui.ISelectionService;\r
+import org.eclipse.ui.IWorkbenchPage;\r
+import org.eclipse.ui.IWorkbenchPart;\r
+import org.eclipse.ui.IWorkbenchSite;\r
+import org.eclipse.ui.IWorkbenchWindow;\r
+import org.eclipse.ui.PlatformUI;\r
+import org.simantics.browsing.ui.GraphExplorer;\r
+import org.simantics.db.Disposable;\r
+import org.simantics.db.management.ISessionContext;\r
+import org.simantics.utils.ObjectUtils;\r
+\r
+/**\r
+ * @author Antti Villberg\r
+ */\r
+public class WorkbenchSelectionInputSource implements WorkbenchSessionContextInputSource, ObservableInputSource,\r
+ ISelectionListener, Disposable {\r
+\r
+ protected ISelectionService service;\r
+ protected Object selection;\r
+ protected IWorkbenchPart part;\r
+ protected IWorkbenchPart ownPart;\r
+ protected InputSourceListener listener;\r
+\r
+ @Override\r
+ public void init(IWorkbenchSite site, IWorkbenchPart ownPart) {\r
+ this.ownPart = ownPart;\r
+ attachToWorkbench();\r
+ }\r
+\r
+ /**\r
+ * @thread SWT\r
+ */\r
+ protected void attachToWorkbench() {\r
+ IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();\r
+ if (window == null)\r
+ return;\r
+ service = window.getSelectionService();\r
+ ISelection initialSelection = service.getSelection();\r
+ IWorkbenchPart activePart = null;\r
+ if (initialSelection != null) {\r
+ IWorkbenchPage activePage = window.getActivePage();\r
+ if (activePage != null)\r
+ activePart = activePage.getActivePart();\r
+ }\r
+ selectionChanged(activePart, initialSelection);\r
+ service.addPostSelectionListener(this);\r
+ }\r
+\r
+ /**\r
+ * @thread SWT\r
+ */\r
+ @Override\r
+ public void dispose() {\r
+ if (service != null)\r
+ service.removePostSelectionListener(this);\r
+ service = null;\r
+ selection = null;\r
+ listener = null;\r
+ }\r
+\r
+ /**\r
+ * @thread SWT\r
+ */\r
+ @Override\r
+ public void selectionChanged(IWorkbenchPart part, ISelection selection) {\r
+ // Do not process selections from self\r
+ if(ObjectUtils.objectEquals(ownPart, part)) return;\r
+ Object old = this.selection;\r
+ this.selection = selection;\r
+ this.part = part;\r
+ //System.err.println("WorkbenchSelectionInputSource.selectionChanged(" + part + ", " + this.selection + ")");\r
+ fireIfInputChanged(old, selection);\r
+ }\r
+\r
+ /**\r
+ * @param oldSelection\r
+ * @param newSelection\r
+ * @thread SWT\r
+ */\r
+ protected void fireIfInputChanged(Object oldSelection, Object newSelection) {\r
+ InputSourceListener l = listener;\r
+ if (l != null)\r
+ if (!ObjectUtils.objectEquals(oldSelection, newSelection))\r
+ l.inputChanged(this);\r
+ }\r
+\r
+ @Override\r
+ public Object get(ISessionContext ctx) {\r
+ return selection != null ? selection : GraphExplorer.EMPTY_INPUT;\r
+ }\r
+ \r
+ @Override\r
+ public IWorkbenchPart getProvider() {\r
+ return this.part;\r
+ }\r
+\r
+ @Override\r
+ public void setListener(InputSourceListener listener) {\r
+ this.listener = listener;\r
+ }\r
+\r
+}\r