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/*******************************************************************************
* 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.IDocument;
import org.eclipse.jface.text.Region;
import org.eclipse.jface.util.Assert;
import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion;
import org.eclipse.wst.sse.core.internal.provisional.StructuredModelManager;
import org.eclipse.wst.sse.ui.StructuredTextEditor;
import org.eclipse.wst.sse.ui.internal.StructuredTextViewer;
import org.w3c.dom.Node;
/**
* @deprecated use StructuredSelectActionDelegate instead
*/
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) {
super();
Assert.isNotNull(editor);
fEditor = editor;
fHistory = (SelectionHistory) editor.getAdapter(SelectionHistory.class);
fViewer = editor.getTextViewer();
fModel = editor.getModel();
Assert.isNotNull(fViewer);
}
abstract protected IndexedRegion getCursorIndexedRegion();
protected IndexedRegion getIndexedRegion(int offset) {
IndexedRegion indexedRegion = null;
int lastOffset = offset;
IDocument document = fEditor.getDocumentProvider().getDocument(fEditor.getEditorInput());
IStructuredModel model = StructuredModelManager.getModelManager().getExistingModelForRead(document);
if (model != null) {
try {
indexedRegion = model.getIndexedRegion(lastOffset);
while (indexedRegion == null && lastOffset >= 0) {
lastOffset--;
indexedRegion = model.getIndexedRegion(lastOffset);
}
}
finally {
model.releaseFromRead();
}
}
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();
}
}
}
}
}
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