| /*=============================================================================# |
| # Copyright (c) 2009, 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.ltk.ui.sourceediting.actions; |
| |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.jface.text.ITextOperationTarget; |
| import org.eclipse.jface.text.source.ISourceViewer; |
| |
| import org.eclipse.statet.jcommons.lang.NonNullByDefault; |
| import org.eclipse.statet.jcommons.lang.Nullable; |
| |
| import org.eclipse.statet.ecommons.ui.util.UIAccess; |
| |
| import org.eclipse.statet.ltk.ui.sourceediting.ISourceEditorCommandIds; |
| import org.eclipse.statet.ltk.ui.sourceediting.SourceEditor; |
| import org.eclipse.statet.ltk.ui.sourceediting.assist.ContentAssist; |
| |
| |
| /** |
| * A content assist executor can invoke content assist for a specific proposal category on an editor. |
| */ |
| @NonNullByDefault |
| public final class SpecificContentAssistHandler extends SourceEditorOperationHandler { |
| |
| |
| private final ContentAssist contentAssist; |
| |
| |
| /** |
| * Creates a new handler. |
| * |
| * @param registry the computer registry to use for the enablement of proposal categories |
| */ |
| public SpecificContentAssistHandler(final SourceEditor editor, final ContentAssist contentAssist) { |
| super(editor, ISourceViewer.CONTENTASSIST_PROPOSALS); |
| this.contentAssist= contentAssist; |
| } |
| |
| |
| /** |
| * Invokes content assist on <code>editor</code>, showing only proposals computed by the |
| * <code>CompletionProposalCategory</code> with the given <code>categoryId</code>. |
| * |
| * @param editor the editor to invoke code assist on |
| * @param categoryId the id of the proposal category to show proposals for |
| */ |
| @Override |
| public @Nullable Object execute(final ExecutionEvent event) throws ExecutionException { |
| final String par= event.getParameter(ISourceEditorCommandIds.SPECIFIC_CONTENT_ASSIST_CATEGORY_PARAMETER_ID); |
| if (par == null) { |
| return null; |
| } |
| final SourceEditor editor= getSourceEditor(event.getApplicationContext()); |
| if (editor == null || !UIAccess.isOkToUse(editor.getViewer())) { |
| return null; |
| } |
| |
| final ITextOperationTarget operationTarget= getOperationTarget(editor); |
| if (operationTarget != null && operationTarget.canDoOperation(getTextOperation())) { |
| this.contentAssist.showPossibleCompletions(par); |
| } |
| return null; |
| } |
| |
| } |