| /******************************************************************************* |
| * Copyright (c) 2000, 2015 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.ui.internal; |
| |
| import org.eclipse.jface.action.ActionContributionItem; |
| import org.eclipse.jface.action.IContributionManager; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.ui.IPluginContribution; |
| import org.eclipse.ui.PlatformUI; |
| import org.eclipse.ui.activities.ActivityManagerEvent; |
| import org.eclipse.ui.activities.IActivityManagerListener; |
| import org.eclipse.ui.activities.IIdentifier; |
| import org.eclipse.ui.activities.IIdentifierListener; |
| import org.eclipse.ui.activities.IWorkbenchActivitySupport; |
| import org.eclipse.ui.activities.IdentifierEvent; |
| import org.eclipse.ui.activities.WorkbenchActivityHelper; |
| |
| /** |
| * Contribution item for actions provided by plugins via workbench action |
| * extension points. |
| */ |
| public class PluginActionContributionItem extends ActionContributionItem |
| implements IIdentifierListener, IActivityManagerListener { |
| |
| private IIdentifier identifier = null; |
| |
| /** |
| * Creates a new contribution item from the given action. The id of the action |
| * is used as the id of the item. |
| * |
| * @param action the action |
| */ |
| public PluginActionContributionItem(PluginAction action) { |
| // dynamic UI (DDW) - this constructor has changed since 1113 |
| super(action); |
| } |
| |
| /** |
| * Hook the activity and identifier listener (if necessary); |
| * |
| * @since 3.1 |
| */ |
| private void hookListeners() { |
| PlatformUI.getWorkbench().getActivitySupport().getActivityManager().addActivityManagerListener(this); |
| // set up the identifier if necessary |
| IIdentifier id = getIdentifier(); |
| if (id != null) { |
| id.addIdentifierListener(this); |
| } |
| } |
| |
| /** |
| * Unhook the activity and identifier listener (if necessary); |
| * |
| * @since 3.1 |
| */ |
| private void unhookListeners() { |
| PlatformUI.getWorkbench().getActivitySupport().getActivityManager().removeActivityManagerListener(this); |
| |
| IIdentifier id = getIdentifier(); |
| if (id != null) { |
| id.removeIdentifierListener(this); |
| } |
| } |
| |
| @Override |
| public void setParent(IContributionManager parent) { |
| IContributionManager oldParent = getParent(); |
| super.setParent(parent); |
| if (oldParent == parent) { |
| return; |
| } |
| |
| if (parent == null) { |
| unhookListeners(); |
| } else { |
| hookListeners(); |
| } |
| } |
| |
| /** |
| * Create the IIdentifier reference for this item. |
| * |
| * @since 3.0 |
| */ |
| private IIdentifier getIdentifier() { |
| if (!WorkbenchActivityHelper.isFiltering()) { |
| return null; |
| } |
| |
| if (identifier == null) { |
| IWorkbenchActivitySupport workbenchActivitySupport = PlatformUI.getWorkbench().getActivitySupport(); |
| IPluginContribution contribution = (IPluginContribution) getAction(); |
| // no need to check if contribution.getPluginId() == null - plugin |
| // actions are always from plugins. |
| identifier = workbenchActivitySupport.getActivityManager() |
| .getIdentifier(WorkbenchActivityHelper.createUnifiedId(contribution)); |
| } |
| return identifier; |
| } |
| |
| /** |
| * Dispose of the IIdentifier if necessary. |
| * |
| * @since 3.0 |
| */ |
| private void disposeIdentifier() { |
| identifier = null; |
| } |
| |
| /** |
| * The default implementation of this <code>IContributionItem</code> method |
| * notifies the delegate if loaded and implements the |
| * <code>IActionDelegate2</code> interface. |
| */ |
| @Override |
| public void dispose() { |
| unhookListeners(); |
| disposeIdentifier(); |
| setParent(null); |
| } |
| |
| @Override |
| public boolean isVisible() { |
| if (identifier != null && !identifier.isEnabled()) { |
| return false; |
| } |
| return super.isVisible(); |
| } |
| |
| @Override |
| public void identifierChanged(IdentifierEvent identifierEvent) { |
| invalidateParent(); |
| } |
| |
| /** |
| * Mark the parent dirty if we have a parent. |
| * |
| * @since 3.1 |
| */ |
| protected void invalidateParent() { |
| IContributionManager parent = getParent(); |
| if (parent != null) { |
| parent.markDirty(); |
| } |
| } |
| |
| @Override |
| public void activityManagerChanged(ActivityManagerEvent activityManagerEvent) { |
| // ensure that if we're going from a non-filtering state that we get an |
| // identifier |
| // and vice versa. |
| if (WorkbenchActivityHelper.isFiltering() && identifier == null) { |
| hookListeners(); |
| invalidateParent(); |
| } else if (!WorkbenchActivityHelper.isFiltering() && identifier != null) { |
| unhookListeners(); |
| disposeIdentifier(); |
| invalidateParent(); |
| } |
| } |
| |
| /* |
| * For testing purposes only |
| */ |
| public ISelection getSelection() { |
| return ((PluginAction) getAction()).getSelection(); |
| } |
| } |