| /*=============================================================================# |
| # Copyright (c) 2015, 2021 Stephan Wahlbrink and others. |
| # |
| # This program and the accompanying materials are made available under the |
| # terms of the Eclipse Public License 2.0 which is available at |
| # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0 |
| # which is available at https://www.apache.org/licenses/LICENSE-2.0. |
| # |
| # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 |
| # |
| # Contributors: |
| # Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation |
| #=============================================================================*/ |
| |
| package org.eclipse.statet.ecommons.ui.actions; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| |
| import org.eclipse.core.commands.AbstractHandler; |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.core.expressions.IEvaluationContext; |
| import org.eclipse.ui.IWorkbenchWindow; |
| import org.eclipse.ui.menus.UIElement; |
| import org.eclipse.ui.services.IServiceScopes; |
| |
| import org.eclipse.statet.jcommons.lang.NonNullByDefault; |
| import org.eclipse.statet.jcommons.lang.Nullable; |
| |
| import org.eclipse.statet.ecommons.ui.workbench.WorkbenchUIUtils; |
| |
| |
| /** |
| * Handler limited to a specified scope. |
| * |
| * @see WorkbenchScopingHandler |
| */ |
| @NonNullByDefault |
| public abstract class AbstractScopeHandler extends AbstractHandler { |
| |
| |
| private Object scope; |
| |
| private @Nullable String commandId; |
| |
| private @Nullable Map<String, Object> filter; |
| |
| |
| public AbstractScopeHandler(final Object scope, final @Nullable String commandId) { |
| init(scope, commandId); |
| } |
| |
| public AbstractScopeHandler() { |
| } |
| |
| void init(final Object scope, final @Nullable String commandId) { |
| if (this.scope != null) { |
| throw new IllegalStateException(); |
| } |
| |
| this.scope= scope; |
| this.commandId= commandId; |
| |
| if (this.scope instanceof IWorkbenchWindow) { |
| this.filter= Collections.singletonMap(IServiceScopes.WINDOW_SCOPE, this.scope); |
| } |
| } |
| |
| public Object getScope() { |
| return this.scope; |
| } |
| |
| public @Nullable String getCommandId() { |
| return this.commandId; |
| } |
| |
| |
| @Override |
| public final void setEnabled(final @Nullable Object appContext) { |
| if (appContext instanceof IEvaluationContext) { |
| setEnabled(appContext); |
| } |
| } |
| |
| public void setEnabled(final IEvaluationContext context) { |
| } |
| |
| protected void refreshElements() { |
| final String commandId= this.commandId; |
| if (commandId != null) { |
| WorkbenchUIUtils.refreshCommandElements(commandId, this, this.filter); |
| } |
| } |
| |
| public void updateElement(final UIElement element, final Map parameters) { |
| } |
| |
| @Override |
| public final @Nullable Object execute(final ExecutionEvent event) throws ExecutionException { |
| final Object appContext= event.getApplicationContext(); |
| if (appContext instanceof IEvaluationContext) { |
| return execute(event, (IEvaluationContext) appContext); |
| } |
| return null; |
| } |
| |
| public abstract @Nullable Object execute(ExecutionEvent event, IEvaluationContext evalContext) |
| throws ExecutionException; |
| |
| } |