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/*******************************************************************************
* Copyright (c) 2008, 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.menus;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.jface.action.ContributionItem;
import org.eclipse.jface.action.IContributionItem;
import org.eclipse.jface.action.IContributionManager;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.CoolBar;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.ToolBar;
import org.eclipse.ui.internal.registry.IWorkbenchRegistryConstants;
import org.eclipse.ui.internal.util.Util;
import org.eclipse.ui.menus.IWorkbenchContribution;
import org.eclipse.ui.services.IServiceLocator;
/**
* A contribution item which proxies a dynamic menu or tool contribution.
* <p>
* It currently supports placement in menus.
* </p>
* <p>
*
* @author Prakash G.R.
*
* @since 3.5
*
*/
public class DynamicMenuContributionItem extends ContributionItem {
private final IConfigurationElement dynamicAddition;
private final IServiceLocator locator;
private boolean alreadyFailed;
private ContributionItem loadedDynamicContribution;
/**
* Creates a DynamicMenuContributionItem
*
* @param id
* - Id of the menu item
* @param locator
* - The Service Locator
* @param dynamicAddition
* - The Configuration Element defined in the plugin.xml
*
*/
public DynamicMenuContributionItem(String id, IServiceLocator locator,
IConfigurationElement dynamicAddition) {
super(id);
this.locator = locator;
this.dynamicAddition = dynamicAddition;
}
@Override
public boolean isDynamic() {
if (loadedDynamicContribution != null) {
return loadedDynamicContribution.isDynamic();
}
return true;
}
@Override
public boolean isDirty() {
if (loadedDynamicContribution != null) {
return loadedDynamicContribution.isDirty();
}
return super.isDirty();
}
@Override
public boolean isEnabled() {
if (loadedDynamicContribution != null) {
return loadedDynamicContribution.isEnabled();
}
return super.isEnabled();
}
@Override
public boolean isGroupMarker() {
if (loadedDynamicContribution != null) {
return loadedDynamicContribution.isGroupMarker();
}
return super.isGroupMarker();
}
@Override
public boolean isSeparator() {
if (loadedDynamicContribution != null) {
return loadedDynamicContribution.isSeparator();
}
return super.isSeparator();
}
@Override
public boolean isVisible() {
if (loadedDynamicContribution != null) {
return loadedDynamicContribution.isVisible();
}
return super.isVisible();
}
@Override
public void saveWidgetState() {
if (loadedDynamicContribution != null) {
loadedDynamicContribution.saveWidgetState();
}
super.saveWidgetState();
}
@Override
public void setVisible(boolean visible) {
if (loadedDynamicContribution != null) {
loadedDynamicContribution.setVisible(visible);
}
super.setVisible(visible);
}
@Override
public void fill(Composite parent) {
IContributionItem contributionItem = getContributionItem();
if (contributionItem != null)
contributionItem.fill(parent);
}
@Override
public void fill(CoolBar parent, int index) {
IContributionItem contributionItem = getContributionItem();
if (contributionItem != null)
contributionItem.fill(parent, index);
}
@Override
public void fill(Menu menu, int index) {
IContributionItem contributionItem = getContributionItem();
if (contributionItem != null)
contributionItem.fill(menu, index);
}
@Override
public void fill(ToolBar parent, int index) {
IContributionItem contributionItem = getContributionItem();
if (contributionItem != null)
contributionItem.fill(parent, index);
}
private IContributionItem getContributionItem() {
if (loadedDynamicContribution == null && !alreadyFailed)
createContributionItem();
return loadedDynamicContribution;
}
private void createContributionItem() {
loadedDynamicContribution = (ContributionItem) Util
.safeLoadExecutableExtension(dynamicAddition,
IWorkbenchRegistryConstants.ATT_CLASS,
ContributionItem.class);
if (loadedDynamicContribution == null) {
alreadyFailed = true;
return;
}
loadedDynamicContribution.setId(getId());
loadedDynamicContribution.setParent(getParent());
if (loadedDynamicContribution instanceof IWorkbenchContribution) {
((IWorkbenchContribution) loadedDynamicContribution)
.initialize(locator);
}
}
@Override
public void dispose() {
if (loadedDynamicContribution != null) {
loadedDynamicContribution.dispose();
loadedDynamicContribution = null;
}
super.dispose();
}
@Override
public void update() {
if (loadedDynamicContribution != null) {
loadedDynamicContribution.update();
}
}
@Override
public void update(String id) {
if (loadedDynamicContribution != null) {
loadedDynamicContribution.update(id);
}
}
@Override
public void setParent(IContributionManager parent) {
super.setParent(parent);
if (loadedDynamicContribution != null) {
loadedDynamicContribution.setParent(parent);
}
}
}
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