| /******************************************************************************* |
| * Copyright (c) 2008 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 |
| *******************************************************************************/ |
| package org.eclipse.wst.sse.ui.internal.handlers; |
| |
| 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.ITextSelection; |
| import org.eclipse.jface.text.Region; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.handlers.HandlerUtil; |
| import org.eclipse.ui.texteditor.ITextEditor; |
| import org.eclipse.wst.sse.core.StructuredModelManager; |
| import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel; |
| import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion; |
| import org.eclipse.wst.sse.ui.internal.selection.SelectionHistory; |
| |
| abstract public class AbstractStructuredSelectHandler extends AbstractHandler { |
| |
| public Object execute(ExecutionEvent event) throws ExecutionException { |
| IEditorPart editor = HandlerUtil.getActiveEditor(event); |
| ITextEditor textEditor = null; |
| if (editor instanceof ITextEditor) |
| textEditor = (ITextEditor) editor; |
| else { |
| Object o = editor.getAdapter(ITextEditor.class); |
| if (o != null) |
| textEditor = (ITextEditor) o; |
| } |
| if (textEditor != null) { |
| ISelection selection = textEditor.getSelectionProvider().getSelection(); |
| IDocument document = textEditor.getDocumentProvider().getDocument(textEditor.getEditorInput()); |
| // determine current text selection |
| if (selection instanceof ITextSelection && document != null) { |
| ITextSelection textSelection = (ITextSelection) selection; |
| |
| if (textSelection.getLength() < document.getLength()) { |
| // get current indexed region |
| IndexedRegion cursorIndexedRegion = getCursorIndexedRegion(document, textSelection); |
| |
| // determine new selection based on current indexed region |
| Region newSelectionRegion = getNewSelectionRegion(cursorIndexedRegion, textSelection); |
| |
| // select new selection |
| if (newSelectionRegion != null) { |
| SelectionHistory history = (SelectionHistory) editor.getAdapter(SelectionHistory.class); |
| if (history != null) { |
| history.remember(new Region(textSelection.getOffset(), textSelection.getLength())); |
| try { |
| history.ignoreSelectionChanges(); |
| textEditor.selectAndReveal(newSelectionRegion.getOffset(), newSelectionRegion.getLength()); |
| } |
| finally { |
| history.listenToSelectionChanges(); |
| } |
| } |
| } |
| } |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * This method will probably be removed and replaced by using new |
| * selection provider |
| * |
| * @param document |
| * @param offset |
| * @return |
| */ |
| protected IndexedRegion getIndexedRegion(IDocument document, int offset) { |
| IndexedRegion indexedRegion = null; |
| |
| int lastOffset = offset; |
| 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 IndexedRegion getCursorIndexedRegion(IDocument document, ITextSelection textSelection); |
| |
| abstract protected Region getNewSelectionRegion(IndexedRegion indexedRegion, ITextSelection textSelection); |
| } |