| /******************************************************************************* |
| * Copyright (c) 2001, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.sse.ui.internal.selection; |
| |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.text.Region; |
| import org.eclipse.jface.util.Assert; |
| import org.eclipse.wst.sse.core.IStructuredModel; |
| import org.eclipse.wst.sse.core.IndexedRegion; |
| import org.eclipse.wst.sse.ui.StructuredTextEditor; |
| import org.eclipse.wst.sse.ui.StructuredTextViewer; |
| import org.w3c.dom.Node; |
| |
| |
| public abstract class StructureSelectAction extends Action { |
| protected StructuredTextEditor fEditor = null; |
| protected SelectionHistory fHistory; |
| protected IStructuredModel fModel = null; |
| protected StructuredTextViewer fViewer = null; |
| |
| public StructureSelectAction(StructuredTextEditor editor, SelectionHistory history) { |
| super(); |
| |
| Assert.isNotNull(editor); |
| Assert.isNotNull(history); |
| fEditor = editor; |
| fHistory = history; |
| fViewer = editor.getTextViewer(); |
| fModel = editor.getModel(); |
| Assert.isNotNull(fViewer); |
| Assert.isNotNull(fModel); |
| } |
| |
| abstract protected IndexedRegion getCursorIndexedRegion(); |
| |
| protected IndexedRegion getIndexedRegion(int offset) { |
| IndexedRegion indexedRegion = null; |
| |
| int lastOffset = offset; |
| indexedRegion = fModel.getIndexedRegion(lastOffset); |
| while (indexedRegion == null && lastOffset >= 0) { |
| lastOffset--; |
| indexedRegion = fModel.getIndexedRegion(lastOffset); |
| } |
| |
| return indexedRegion; |
| } |
| |
| abstract protected Region getNewSelectionRegion(Node node, Region region); |
| |
| public void run() { |
| Region currentRegion = new Region(fViewer.getSelectedRange().x, fViewer.getSelectedRange().y); |
| if (currentRegion.getLength() == fViewer.getDocument().getLength()) |
| return; |
| |
| IndexedRegion cursorIndexedRegion = getCursorIndexedRegion(); |
| if (cursorIndexedRegion instanceof Node) { |
| Node cursorNode = (Node) cursorIndexedRegion; |
| |
| // use parent node for empty text node |
| if (cursorNode.getNodeType() == Node.TEXT_NODE && cursorNode.getNodeValue().trim().length() == 0) { |
| cursorNode = cursorNode.getParentNode(); |
| |
| if (cursorNode instanceof IndexedRegion) |
| cursorIndexedRegion = (IndexedRegion) cursorNode; |
| } |
| |
| Region cursorNodeRegion = new Region(cursorIndexedRegion.getStartOffset(), cursorIndexedRegion.getEndOffset() - cursorIndexedRegion.getStartOffset()); |
| |
| Region newRegion = null; |
| if (cursorNodeRegion.getOffset() >= currentRegion.getOffset() && cursorNodeRegion.getOffset() <= currentRegion.getOffset() + currentRegion.getLength() && cursorNodeRegion.getOffset() + cursorNodeRegion.getLength() >= currentRegion.getOffset() && cursorNodeRegion.getOffset() + cursorNodeRegion.getLength() <= currentRegion.getOffset() + currentRegion.getLength()) |
| newRegion = getNewSelectionRegion(cursorNode, currentRegion); |
| else |
| newRegion = cursorNodeRegion; |
| |
| if (newRegion != null) { |
| fHistory.remember(currentRegion); |
| try { |
| fHistory.ignoreSelectionChanges(); |
| fEditor.selectAndReveal(newRegion.getOffset(), newRegion.getLength()); |
| } finally { |
| fHistory.listenToSelectionChanges(); |
| } |
| } |
| } |
| } |
| } |