| /******************************************************************************* |
| * Copyright (c) 2004, 2012 Tasktop Technologies and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.context.ui.state; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.jface.preference.IPreferenceStore; |
| import org.eclipse.mylyn.internal.context.ui.ContextUiPlugin; |
| import org.eclipse.mylyn.internal.context.ui.IContextUiPreferenceContstants; |
| import org.eclipse.ui.IMemento; |
| import org.eclipse.ui.IPerspectiveDescriptor; |
| import org.eclipse.ui.IWorkbenchWindow; |
| import org.eclipse.ui.PlatformUI; |
| |
| /** |
| * Saves the active perspective on context deactivation and restores it on activation. |
| * |
| * @author Mik Kersten |
| * @author Shawn Minto |
| * @author Steffen Pingel |
| */ |
| public class PerspectiveStateParticipant extends ContextStateParticipant { |
| |
| public static final String KEY_ACTIVE_ID = "activeId"; //$NON-NLS-1$ |
| |
| public static final String MEMENTO_PERSPECTIVE = "org.eclipse.mylyn.context.ui.perspectives"; //$NON-NLS-1$ |
| |
| private final IPreferenceStore preferenceStore; |
| |
| public PerspectiveStateParticipant(IPreferenceStore preferenceStore) { |
| this.preferenceStore = preferenceStore; |
| } |
| |
| @Override |
| public void clearState(String contextHandle, boolean isActiveContext) { |
| // ignore |
| } |
| |
| public String getActivePerspectiveId() { |
| if (PlatformUI.isWorkbenchRunning()) { |
| IWorkbenchWindow launchingWindow = getWorkbenchWindow(); |
| if (launchingWindow != null) { |
| return getActivePerspectiveId(launchingWindow); |
| } |
| } |
| return null; |
| } |
| |
| public IWorkbenchWindow getWorkbenchWindow() { |
| if (PlatformUI.isWorkbenchRunning()) { |
| IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow(); |
| if (window == null) { |
| IWorkbenchWindow[] windows = PlatformUI.getWorkbench().getWorkbenchWindows(); |
| if (windows.length > 0) { |
| window = windows[0]; |
| } |
| } |
| return window; |
| } |
| return null; |
| } |
| |
| @Override |
| public boolean isEnabled() { |
| return ContextUiPlugin.getDefault() |
| .getPreferenceStore() |
| .getBoolean(IContextUiPreferenceContstants.AUTO_MANAGE_PERSPECTIVES); |
| } |
| |
| @Override |
| public void restoreDefaultState(ContextState memento) { |
| String previousPerspectiveId = getDefaultPerspectiveId(); |
| showPerspective(previousPerspectiveId); |
| } |
| |
| @Override |
| public void restoreState(ContextState state) { |
| IWorkbenchWindow launchingWindow = getWorkbenchWindow(); |
| if (launchingWindow != null) { |
| // restore perspective |
| IMemento memento = state.getMemento(MEMENTO_PERSPECTIVE); |
| if (memento != null) { |
| String perspectiveId = memento.getString(KEY_ACTIVE_ID); |
| showPerspective(perspectiveId); |
| } |
| } |
| } |
| |
| @Override |
| public void saveDefaultState(ContextState memento) { |
| String id = getActivePerspectiveId(); |
| if (id != null) { |
| setDefaultPerspectiveId(id); |
| } |
| } |
| |
| @Override |
| public void saveState(ContextState state, boolean allowModifications) { |
| String id = getActivePerspectiveId(); |
| if (id != null) { |
| IMemento memento = state.createMemento(MEMENTO_PERSPECTIVE); |
| memento.putString(KEY_ACTIVE_ID, id); |
| } |
| } |
| |
| private String getActivePerspectiveId(IWorkbenchWindow window) { |
| Assert.isNotNull(window); |
| IPerspectiveDescriptor descriptor = window.getActivePage().getPerspective(); |
| return descriptor.getId(); |
| } |
| |
| private String getDefaultPerspectiveId() { |
| return preferenceStore.getString(IContextUiPreferenceContstants.PERSPECTIVE_NO_ACTIVE_TASK); |
| } |
| |
| private void setDefaultPerspectiveId(String perspectiveId) { |
| preferenceStore.setValue(IContextUiPreferenceContstants.PERSPECTIVE_NO_ACTIVE_TASK, perspectiveId); |
| } |
| |
| private void showPerspective(String perspectiveId) { |
| if (perspectiveId != null && perspectiveId.length() > 0) { |
| IWorkbenchWindow launchingWindow = getWorkbenchWindow(); |
| if (launchingWindow != null) { |
| try { |
| launchingWindow.getShell().setRedraw(false); |
| PlatformUI.getWorkbench().showPerspective(perspectiveId, launchingWindow); |
| } catch (Exception e) { |
| // perspective's preserved id not found, ignore |
| } finally { |
| launchingWindow.getShell().setRedraw(true); |
| } |
| } |
| } |
| } |
| |
| } |