1 /***
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that the following conditions are
4 * met :
5 *
6 * . Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 *
9 * . Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * . The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $Id$
29 */
30
31 package palmed.edit.selection;
32
33 /***
34 * This class implements an action to delete the selected text.
35 *
36 * @author Mathieu Champlon
37 * @version $Revision$ $Date$
38 */
39 public final class SelectionDeletion extends AbstractAction
40 {
41 /***
42 * The selection.
43 */
44 private final ISelection selection_;
45
46 /***
47 * Create a backspace action.
48 *
49 * @param selection the selection
50 */
51 public SelectionDeletion( final ISelection selection )
52 {
53 super( selection );
54 selection_ = selection;
55 }
56
57 /***
58 * {@inheritDoc}
59 */
60 protected void onPerform()
61 {
62 backupData();
63 selection_.delete();
64 }
65
66 /***
67 * {@inheritDoc}
68 */
69 protected boolean onUndo()
70 {
71 restoreData();
72 return true;
73 }
74
75 /***
76 * {@inheritDoc}
77 */
78 protected boolean onRedo()
79 {
80 selection_.delete();
81 return true;
82 }
83
84 /***
85 * {@inheritDoc}
86 */
87 public boolean merge( final IAction action )
88 {
89 return false;
90 }
91 }