| /******************************************************************************* |
| * Copyright (c) 2001, 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 |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.sse.core.internal.text; |
| |
| import org.eclipse.jface.text.BadPositionCategoryException; |
| import org.eclipse.jface.text.DefaultPositionUpdater; |
| |
| /** |
| * Follows the behavior of DefaultPositionUpdater except in addition to |
| * deleting/overwriting text which completely contains the position deletes |
| * the position, deleting text that equals the text in position also deletes |
| * the position. |
| * |
| * @see org.eclipse.jface.text.DefaultPositionUpdater |
| */ |
| public class DeleteEqualPositionUpdater extends DefaultPositionUpdater { |
| |
| /** |
| * @param category |
| */ |
| public DeleteEqualPositionUpdater(String category) { |
| super(category); |
| } |
| |
| /** |
| * Determines whether the currently investigated position has been deleted |
| * by the replace operation specified in the current event. If so, it |
| * deletes the position and removes it from the document's position |
| * category. |
| * |
| * NOTE: position is deleted if current event completely overwrites |
| * position OR if current event deletes the area surrounding/including the |
| * position |
| * |
| * @return <code>true</code> if position has been deleted |
| */ |
| protected boolean notDeleted() { |
| // position is deleted if current event completely overwrites position |
| // OR if |
| // current event deletes the area surrounding/including the position |
| if ((fOffset < fPosition.offset && (fPosition.offset + fPosition.length < fOffset + fLength)) || (fOffset <= fPosition.offset && (fPosition.offset + fPosition.length <= fOffset + fLength) && fReplaceLength == 0)) { |
| |
| fPosition.delete(); |
| |
| try { |
| fDocument.removePosition(getCategory(), fPosition); |
| } catch (BadPositionCategoryException x) { |
| } |
| |
| return false; |
| } |
| |
| return true; |
| } |
| |
| } |