| /******************************************************************************* |
| * Copyright (c) 2005 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.selection; |
| |
| import org.eclipse.jface.action.IAction; |
| 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.swt.widgets.Event; |
| import org.eclipse.ui.IActionDelegate2; |
| import org.eclipse.ui.IEditorActionDelegate; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.IViewActionDelegate; |
| import org.eclipse.ui.IViewPart; |
| 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; |
| |
| abstract public class StructuredSelectActionDelegate implements IEditorActionDelegate, IActionDelegate2, IViewActionDelegate { |
| private IEditorPart fEditor; |
| private SelectionHistory fHistory; |
| |
| public void dispose() { |
| fEditor = null; |
| fHistory = null; |
| } |
| |
| public void init(IViewPart view) { |
| // do nothing |
| } |
| |
| public void runWithEvent(IAction action, Event event) { |
| run(action); |
| } |
| |
| public void run(IAction action) { |
| if (fEditor instanceof ITextEditor) { |
| ITextEditor textEditor = (ITextEditor) fEditor; |
| |
| 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) { |
| fHistory.remember(new Region(textSelection.getOffset(), textSelection.getLength())); |
| try { |
| fHistory.ignoreSelectionChanges(); |
| textEditor.selectAndReveal(newSelectionRegion.getOffset(), newSelectionRegion.getLength()); |
| } |
| finally { |
| fHistory.listenToSelectionChanges(); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| public void selectionChanged(IAction action, ISelection selection) { |
| // do nothing |
| } |
| |
| public void setActiveEditor(IAction action, IEditorPart targetEditor) { |
| fEditor = targetEditor; |
| if (fEditor != null) |
| fHistory = (SelectionHistory) fEditor.getAdapter(SelectionHistory.class); |
| else |
| fHistory = null; |
| } |
| |
| abstract protected IndexedRegion getCursorIndexedRegion(IDocument document, ITextSelection textSelection); |
| |
| abstract protected Region getNewSelectionRegion(IndexedRegion indexedRegion, ITextSelection textSelection); |
| |
| /** |
| * 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; |
| } |
| |
| } |