| /*=============================================================================# |
| # Copyright (c) 2006, 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.AbstractHandler; |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.ITextSelection; |
| import org.eclipse.jface.text.ITextViewerExtension5; |
| import org.eclipse.jface.text.source.ICharacterPairMatcher; |
| import org.eclipse.jface.text.source.ISourceViewer; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.ui.texteditor.IEditorStatusLine; |
| |
| import org.eclipse.statet.ecommons.text.ICharPairMatcher; |
| |
| import org.eclipse.statet.internal.ltk.ui.EditingMessages; |
| import org.eclipse.statet.ltk.ui.sourceediting.SourceEditor; |
| |
| |
| public class GotoMatchingBracketHandler extends AbstractHandler { |
| |
| |
| private final SourceEditor sourceEditor; |
| |
| private final ICharPairMatcher pairMatcher; |
| |
| |
| public GotoMatchingBracketHandler(final ICharPairMatcher pairMatcher, final SourceEditor editor) { |
| assert (pairMatcher != null); |
| assert (editor != null); |
| this.sourceEditor= editor; |
| this.pairMatcher= pairMatcher; |
| |
| // setBaseEnabled(true); |
| } |
| |
| |
| @Override |
| public Object execute(final ExecutionEvent event) throws ExecutionException { |
| gotoMatchingBracket(); |
| |
| return null; |
| } |
| |
| /** |
| * Jumps to the matching bracket. |
| */ |
| public void gotoMatchingBracket() { |
| final ISourceViewer sourceViewer= this.sourceEditor.getViewer(); |
| if (sourceViewer == null) { |
| return; |
| } |
| final IDocument document= sourceViewer.getDocument(); |
| |
| final ITextSelection selection= (ITextSelection) sourceViewer.getSelectionProvider().getSelection(); |
| final int offset= selection.getOffset(); |
| final int selectionLength= selection.getLength(); |
| |
| final IRegion region= (selectionLength <= 1) ? |
| this.pairMatcher.match(document, offset, (selection.getLength() == 0)): null; |
| { String message= null; |
| if (region == null) { |
| message= EditingMessages.GotoMatchingBracketAction_error_InvalidSelection; |
| } |
| else if (region.getLength() < 2) { |
| if (region.getLength() >= 0) { |
| return; // invalid |
| } |
| message= EditingMessages.GotoMatchingBracketAction_error_NoMatchingBracket; |
| } |
| if (message != null) { |
| final IEditorStatusLine statusLine= this.sourceEditor.getAdapter(IEditorStatusLine.class); |
| if (statusLine != null) { |
| statusLine.setMessage(true, message, null); |
| } |
| Display.getCurrent().beep(); |
| return; |
| } |
| } |
| |
| { final int targetOffset= (this.pairMatcher.getAnchor() == ICharacterPairMatcher.RIGHT) ? |
| region.getOffset() + 1 : region.getOffset() + region.getLength() - 1; |
| |
| boolean visible= false; |
| if (sourceViewer instanceof ITextViewerExtension5) { |
| final ITextViewerExtension5 extension= (ITextViewerExtension5) sourceViewer; |
| visible= (extension.modelOffset2WidgetOffset(targetOffset) > -1); |
| } else { |
| final IRegion visibleRegion= sourceViewer.getVisibleRegion(); |
| visible= (targetOffset >= visibleRegion.getOffset() && targetOffset <= visibleRegion.getOffset() + visibleRegion.getLength()); |
| } |
| |
| if (!visible) { |
| final IEditorStatusLine statusLine= this.sourceEditor.getAdapter(IEditorStatusLine.class); |
| if (statusLine != null) { |
| statusLine.setMessage(true, EditingMessages.GotoMatchingBracketAction_error_BracketOutsideSelectedElement, null); |
| } |
| Display.getCurrent().beep(); |
| return; |
| } |
| |
| sourceViewer.setSelectedRange(targetOffset, 0); |
| sourceViewer.revealRange(targetOffset, 0); |
| } |
| } |
| |
| } |