| /******************************************************************************* |
| * Copyright (c) 2006 Sybase, Inc. 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: |
| * Sybase, Inc. - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jst.pagedesigner.viewer; |
| |
| import org.eclipse.jface.viewers.ISelection; |
| |
| /** |
| * @author mengbo |
| */ |
| public class DesignRange implements ISelection |
| { |
| private final DesignPosition _start; |
| private final DesignPosition _end; |
| |
| /** |
| * @param start |
| * @param end |
| */ |
| public DesignRange(DesignPosition start, DesignPosition end) { |
| _start = start; |
| _end = end; |
| } |
| |
| /** |
| * @return the start position in the range |
| */ |
| public DesignPosition getStartPosition() { |
| return _start; |
| } |
| |
| /** |
| * @return the end position in the range |
| */ |
| public DesignPosition getEndPosition() { |
| return _end; |
| } |
| |
| /** |
| * @return true if the range is valid |
| */ |
| public boolean isValid() { |
| return _start != null && _start.isValid() && _end != null |
| && _end.isValid(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.ISelection#isEmpty() |
| */ |
| public boolean isEmpty() { |
| // FIXME: temp implementation, need revisit. |
| return !isValid() || _start.equals(_end); |
| } |
| |
| /** |
| * @param buffer |
| * @return a buffer with the debug dum |
| */ |
| public StringBuffer debugDump(StringBuffer buffer) { |
| if (_start != null) { |
| buffer.append("Start: ").append(_start); //$NON-NLS-1$ |
| } else { |
| buffer.append("Start: null"); //$NON-NLS-1$ |
| } |
| if (_end != null) { |
| buffer.append("End: ").append(_end); //$NON-NLS-1$ |
| } else { |
| buffer.append("End: null"); //$NON-NLS-1$ |
| } |
| return buffer; |
| } |
| |
| public String toString() { |
| StringBuffer buffer = new StringBuffer(); |
| return debugDump(buffer).toString(); |
| } |
| } |