1 /**************************************************************
2  *
3  * Licensed to the Apache Software Foundation (ASF) under one
4  * or more contributor license agreements.  See the NOTICE file
5  * distributed with this work for additional information
6  * regarding copyright ownership.  The ASF licenses this file
7  * to you under the Apache License, Version 2.0 (the
8  * "License"); you may not use this file except in compliance
9  * with the License.  You may obtain a copy of the License at
10  *
11  *   http://www.apache.org/licenses/LICENSE-2.0
12  *
13  * Unless required by applicable law or agreed to in writing,
14  * software distributed under the License is distributed on an
15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16  * KIND, either express or implied.  See the License for the
17  * specific language governing permissions and limitations
18  * under the License.
19  *
20  *************************************************************/
21 
22 // MARKER(update_precomp.py): autogen include statement, do not remove
23 #include "precompiled_svx.hxx"
24 #include <svx/sdrundomanager.hxx>
25 
26 //////////////////////////////////////////////////////////////////////////////
27 
28 SdrUndoManager::SdrUndoManager(sal_uInt16 nMaxUndoActionCount)
29 :   EditUndoManager(nMaxUndoActionCount),
30     maEndTextEditHdl(),
31     mpLastUndoActionBeforeTextEdit(0)
32 {
33 }
34 
35 SdrUndoManager::~SdrUndoManager()
36 {
37 }
38 
39 sal_Bool SdrUndoManager::Undo()
40 {
41     sal_Bool bRetval(sal_False);
42 
43     if(maEndTextEditHdl.IsSet())
44     {
45         // we are in text edit mode
46         if(GetUndoActionCount() && mpLastUndoActionBeforeTextEdit != GetUndoAction(0))
47         {
48             // there is an undo action for text edit, trigger it
49             bRetval = EditUndoManager::Undo();
50         }
51         else
52         {
53             // no more text edit undo, end text edit
54             maEndTextEditHdl.Call(this);
55         }
56     }
57 
58     if(!bRetval && GetUndoActionCount())
59     {
60         // no undo triggered up to now, trigger local one
61         bRetval = SfxUndoManager::Undo();
62     }
63 
64     return bRetval;
65 }
66 
67 sal_Bool SdrUndoManager::Redo()
68 {
69     sal_Bool bRetval(sal_False);
70 
71     if(maEndTextEditHdl.IsSet())
72     {
73         // we are in text edit mode
74         bRetval = EditUndoManager::Redo();
75     }
76 
77     if(!bRetval)
78     {
79         // no redo triggered up to now, trigger local one
80         bRetval = SfxUndoManager::Redo();
81     }
82 
83     return bRetval;
84 }
85 
86 void SdrUndoManager::SetEndTextEditHdl(const Link& rLink)
87 {
88     maEndTextEditHdl = rLink;
89 
90     if(maEndTextEditHdl.IsSet())
91     {
92         // text edit start, remember last non-textedit action for later cleanup
93         mpLastUndoActionBeforeTextEdit = GetUndoActionCount() ? GetUndoAction(0) : 0;
94     }
95     else
96     {
97         // text edit ends, pop all textedit actions up to the remembered non-textedit action from the start
98         // to set back the UndoManager to the state before text edit started. If that action is already gone
99         // (due to being removed from the undo stack in the meantime), all need to be removed anyways
100         while(GetUndoActionCount() && mpLastUndoActionBeforeTextEdit != GetUndoAction(0))
101         {
102             RemoveLastUndoAction();
103         }
104 
105         // urgently needed: RemoveLastUndoAction does NOT correct the Redo stack by itself (!)
106         ClearRedo();
107 
108         // forget marker again
109         mpLastUndoActionBeforeTextEdit = 0;
110     }
111 }
112 
113 //////////////////////////////////////////////////////////////////////////////
114 // eof
115