--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007- VTT Technical Research Centre of Finland.\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.ui.workbench.handler.e4;\r
+\r
+import java.lang.reflect.InvocationTargetException;\r
+import java.util.List;\r
+import java.util.concurrent.atomic.AtomicReference;\r
+\r
+import org.eclipse.core.commands.Command;\r
+import org.eclipse.core.commands.ExecutionException;\r
+import org.eclipse.core.commands.State;\r
+import org.eclipse.core.runtime.IProgressMonitor;\r
+import org.eclipse.core.runtime.IStatus;\r
+import org.eclipse.e4.core.contexts.Active;\r
+import org.eclipse.e4.core.di.annotations.CanExecute;\r
+import org.eclipse.e4.core.di.annotations.Execute;\r
+import org.eclipse.e4.ui.model.application.MApplication;\r
+import org.eclipse.e4.ui.model.application.ui.basic.MPart;\r
+import org.eclipse.e4.ui.workbench.modeling.EModelService;\r
+import org.eclipse.jface.action.IStatusLineManager;\r
+import org.eclipse.jface.dialogs.ProgressMonitorDialog;\r
+import org.eclipse.jface.operation.IRunnableWithProgress;\r
+import org.eclipse.swt.widgets.Shell;\r
+import org.eclipse.ui.IWorkbenchPart;\r
+import org.eclipse.ui.PlatformUI;\r
+import org.eclipse.ui.commands.ICommandService;\r
+import org.simantics.Simantics;\r
+import org.simantics.db.ChangeSetIdentifier;\r
+import org.simantics.db.Operation;\r
+import org.simantics.db.Session;\r
+import org.simantics.db.common.CommentMetadata;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.exception.NoHistoryException;\r
+import org.simantics.db.service.ManagementSupport;\r
+import org.simantics.db.service.UndoRedoSupport;\r
+import org.simantics.ui.states.TrackedTextState;\r
+import org.simantics.utils.ui.ErrorLogger;\r
+import org.simantics.utils.ui.workbench.WorkbenchUtils;\r
+\r
+/**\r
+ * @author Kalle Kondelin\r
+ * @author Jani Simomaa\r
+ */\r
+public class SessionUndoHandler {\r
+ \r
+ private final static boolean DEBUG = false;\r
+ private final static boolean ENABLED = true;\r
+ \r
+ @CanExecute\r
+ public boolean canExecute() {\r
+ return UndoRedoTester.canUndo();\r
+ }\r
+ \r
+ @Execute\r
+ public void execute(@Active MPart activePart, MApplication mApplication, EModelService modelService) throws ExecutionException {\r
+ if (DEBUG)\r
+ System.out.println("--\nUndo handler called.");\r
+\r
+ if (activePart == null)\r
+ return;\r
+ final Session session = Simantics.peekSession();\r
+ if (session == null)\r
+ return;\r
+ \r
+ ICommandService service = (ICommandService) PlatformUI.getWorkbench().getService(ICommandService.class);\r
+ Command command = service.getCommand( TrackedTextState.COMMAND_ID );\r
+ State state = command.getState( TrackedTextState.STATE_ID );\r
+ \r
+ boolean sessionUndoEnabled = true;\r
+ Object value = state.getValue();\r
+ if (value != null && value instanceof Boolean)\r
+ sessionUndoEnabled = (Boolean) value;\r
+ \r
+ if (ENABLED) {\r
+ if (sessionUndoEnabled) {\r
+ try {\r
+ final AtomicReference<String> msg = new AtomicReference<String>();\r
+ IRunnableWithProgress undo = new IRunnableWithProgress() {\r
+ @Override\r
+ public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {\r
+ try {\r
+ monitor.beginTask("Undo", IProgressMonitor.UNKNOWN);\r
+ msg.set( undo( session ) );\r
+ } catch (NoHistoryException e) {\r
+ msg.set("Nothing to undo.");\r
+ } catch (DatabaseException e) {\r
+ throw new InvocationTargetException(e);\r
+ } finally {\r
+ monitor.done();\r
+ }\r
+ }\r
+ };\r
+ \r
+ // busyCursorWhile does not work because locking the session for undo\r
+ // will also lock the UI completely.\r
+ //PlatformUI.getWorkbench().getProgressService().busyCursorWhile(undo);\r
+ Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();\r
+ new ProgressMonitorDialog(shell).run(true, false, undo);\r
+ \r
+ //\r
+ // TODO Not the Eclipse 4 way of using IStatusLineManager!\r
+ // See:\r
+ // https://bugs.eclipse.org/bugs/show_bug.cgi?id=332499\r
+ // https://www.eclipse.org/forums/index.php?t=msg&th=367379&goto=941232&#msg_941232\r
+ //\r
+ IWorkbenchPart part = WorkbenchUtils.getActiveWorkbenchPart();\r
+ IStatusLineManager manager = WorkbenchUtils.getStatusLine(part);\r
+ manager.setMessage(msg.get());\r
+// statusManager.setMessage( msg.get() );\r
+ } catch (InvocationTargetException e1) {\r
+ throw new ExecutionException("Undo failed, database failure.", e1);\r
+ } catch (InterruptedException e1) {\r
+ throw new ExecutionException("Undo failed, interrupted.", e1);\r
+ }\r
+ }\r
+ } else {\r
+ ErrorLogger.getDefault().log(IStatus.INFO, 0, "The undo command is disabled", null);\r
+ }\r
+ return;\r
+ }\r
+\r
+ public static String getComment(Session session, ChangeSetIdentifier id) {\r
+ byte[] data = id.getMetadata().get(CommentMetadata.class.getName());\r
+ if(data == null)\r
+ return "Undescribed operation.";\r
+ String comment = CommentMetadata.deserialise(session, data).toString().trim();\r
+ if(comment.isEmpty())\r
+ return "Undescribed operation.";\r
+ return comment;\r
+ }\r
+ \r
+ private String undo(Session session) throws DatabaseException {\r
+ UndoRedoSupport support = session.getService(UndoRedoSupport.class);\r
+ \r
+ List<Operation> ops = support.undoAndReturnOperations(session, 1);\r
+ if(ops.isEmpty())\r
+ return "Undo history is empty."; \r
+ \r
+ Operation mainOperation = ops.get(0);\r
+ \r
+ String msg = null;\r
+ long csId = mainOperation.getCSId();\r
+\r
+ ManagementSupport management = session.getService(ManagementSupport.class);\r
+ for(ChangeSetIdentifier id : management.getChangeSetIdentifiers(csId, csId))\r
+ if(msg == null)\r
+ msg = "Undo reverted: " + getComment(session, id);\r
+\r
+ if (DEBUG)\r
+ System.out.println(msg);\r
+ return msg;\r
+ }\r
+\r
+}\r
Code Review / simantics / platform.git / blobdiff