qundostack.cpp

Absolute File Name:/home/qt/qt5_coco/qt5/qtbase/src/widgets/util/qundostack.cpp
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5QUndoCommand::QUndoCommand(const QString &text, QUndoCommand *parent)-
6{-
7 d = new QUndoCommandPrivate;-
8 if (parent != 0)-
9 parent->d->child_list.append(this);-
10 setText(text);-
11}-
12QUndoCommand::QUndoCommand(QUndoCommand *parent)-
13{-
14 d = new QUndoCommandPrivate;-
15 if (parent != 0)-
16 parent->d->child_list.append(this);-
17}-
18-
19-
20-
21-
22-
23-
24-
25QUndoCommand::~QUndoCommand()-
26{-
27 qDeleteAll(d->child_list);-
28 delete d;-
29}-
30int QUndoCommand::id() const-
31{-
32 return -1;-
33}-
34bool QUndoCommand::mergeWith(const QUndoCommand *command)-
35{-
36 (void)command;;-
37 return false;-
38}-
39void QUndoCommand::redo()-
40{-
41 for (int i = 0; i < d->child_list.size(); ++i)-
42 d->child_list.at(i)->redo();-
43}-
44void QUndoCommand::undo()-
45{-
46 for (int i = d->child_list.size() - 1; i >= 0; --i)-
47 d->child_list.at(i)->undo();-
48}-
49QString QUndoCommand::text() const-
50{-
51 return d->text;-
52}-
53QString QUndoCommand::actionText() const-
54{-
55 return d->actionText;-
56}-
57void QUndoCommand::setText(const QString &text)-
58{-
59 int cdpos = text.indexOf(QLatin1Char('\n'));-
60 if (cdpos > 0) {-
61 d->text = text.left(cdpos);-
62 d->actionText = text.mid(cdpos + 1);-
63 } else {-
64 d->text = text;-
65 d->actionText = text;-
66 }-
67}-
68int QUndoCommand::childCount() const-
69{-
70 return d->child_list.count();-
71}-
72const QUndoCommand *QUndoCommand::child(int index) const-
73{-
74 if (index < 0 || index >= d->child_list.count())-
75 return 0;-
76 return d->child_list.at(index);-
77}-
78QUndoAction::QUndoAction(const QString &prefix, QObject *parent)-
79 : QAction(parent)-
80{-
81 m_prefix = prefix;-
82}-
83-
84void QUndoAction::setPrefixedText(const QString &text)-
85{-
86 if (m_defaultText.isEmpty()) {-
87 QString s = m_prefix;-
88 if (!m_prefix.isEmpty() && !text.isEmpty())-
89 s.append(QLatin1Char(' '));-
90 s.append(text);-
91 setText(s);-
92 } else {-
93 if (text.isEmpty())-
94 setText(m_defaultText);-
95 else-
96 setText(m_prefix.arg(text));-
97 }-
98}-
99-
100void QUndoAction::setTextFormat(const QString &textFormat, const QString &defaultText)-
101{-
102 m_prefix = textFormat;-
103 m_defaultText = defaultText;-
104}-
105void QUndoStackPrivate::setIndex(int idx, bool clean)-
106{-
107 QUndoStack * const q = q_func();-
108-
109 bool was_clean = index == clean_index;-
110-
111 if (idx != index) {-
112 index = idx;-
113 q->indexChanged(index);-
114 q->canUndoChanged(q->canUndo());-
115 q->undoTextChanged(q->undoText());-
116 q->canRedoChanged(q->canRedo());-
117 q->redoTextChanged(q->redoText());-
118 }-
119-
120 if (clean)-
121 clean_index = index;-
122-
123 bool is_clean = index == clean_index;-
124 if (is_clean != was_clean)-
125 q->cleanChanged(is_clean);-
126}-
127bool QUndoStackPrivate::checkUndoLimit()-
128{-
129 if (undo_limit <= 0 || !macro_stack.isEmpty() || undo_limit >= command_list.count())-
130 return false;-
131-
132 int del_count = command_list.count() - undo_limit;-
133-
134 for (int i = 0; i < del_count; ++i)-
135 delete command_list.takeFirst();-
136-
137 index -= del_count;-
138 if (clean_index != -1) {-
139 if (clean_index < del_count)-
140 clean_index = -1;-
141 else-
142 clean_index -= del_count;-
143 }-
144-
145 return true;-
146}-
147QUndoStack::QUndoStack(QObject *parent)-
148 : QObject(*(new QUndoStackPrivate), parent)-
149{-
150-
151 if (QUndoGroup *group = qobject_cast<QUndoGroup*>(parent))-
152 group->addStack(this);-
153-
154}-
155QUndoStack::~QUndoStack()-
156{-
157-
158 QUndoStackPrivate * const d = d_func();-
159 if (d->group != 0)-
160 d->group->removeStack(this);-
161-
162 clear();-
163}-
164void QUndoStack::clear()-
165{-
166 QUndoStackPrivate * const d = d_func();-
167-
168 if (d->command_list.isEmpty())-
169 return;-
170-
171 bool was_clean = isClean();-
172-
173 d->macro_stack.clear();-
174 qDeleteAll(d->command_list);-
175 d->command_list.clear();-
176-
177 d->index = 0;-
178 d->clean_index = 0;-
179-
180 indexChanged(0);-
181 canUndoChanged(false);-
182 undoTextChanged(QString());-
183 canRedoChanged(false);-
184 redoTextChanged(QString());-
185-
186 if (!was_clean)-
187 cleanChanged(true);-
188}-
189void QUndoStack::push(QUndoCommand *cmd)-
190{-
191 QUndoStackPrivate * const d = d_func();-
192 cmd->redo();-
193-
194 bool macro = !d->macro_stack.isEmpty();-
195-
196 QUndoCommand *cur = 0;-
197 if (macro
macroDescription
TRUEnever evaluated
FALSEnever evaluated
) {		0
198 QUndoCommand *macro_cmd = d->macro_stack.lastconstLast();-
199 if (!macro_cmd->d->child_list.isEmpty()
!macro_cmd->d-...list.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
)		0
200 cur = macro_cmd->d->child_list.lastconstLast();
never executed: cur = macro_cmd->d->child_list.constLast();
0
201 }
never executed: end of block
 else {		0
202 if (d->index > 0
d->index > 0Description
TRUEnever evaluated
FALSEnever evaluated
)		0
203 cur = d->command_list.at(d->index - 1);
never executed: cur = d->command_list.at(d->index - 1);
0
204 while (d->index < d->command_list.size()
d->index < d->...nd_list.size()Description
TRUEnever evaluated
FALSEnever evaluated
)		0
205 delete d->command_list.takeLast();
never executed: delete d->command_list.takeLast();
0
206 if (d->clean_index > d->index
d->clean_index > d->indexDescription
TRUEnever evaluated
FALSEnever evaluated
)		0
207 d->clean_index = -1;
never executed: d->clean_index = -1;
0
208 }
never executed: end of block
0
209-
210 bool try_merge = cur != 0
cur != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
211 && cur->id() != -1
cur->id() != -1Description
TRUEnever evaluated
FALSEnever evaluated
0
212 && cur->id() == cmd->id()
cur->id() == cmd->id()Description
TRUEnever evaluated
FALSEnever evaluated
0
213 && (macro
macroDescription
TRUEnever evaluated
FALSEnever evaluated
 || d->index != d->clean_index
d->index != d->clean_indexDescription
TRUEnever evaluated
FALSEnever evaluated
);		0
214-
215 if (try_merge
try_mergeDescription
TRUEnever evaluated
FALSEnever evaluated
 && cur->mergeWith(cmd)
cur->mergeWith(cmd)Description
TRUEnever evaluated
FALSEnever evaluated
) {		0
216 delete cmd;-
217 if (!macro
!macroDescription
TRUEnever evaluated
FALSEnever evaluated
) {		0
218 indexChanged(d->index);-
219 canUndoChanged(canUndo());-
220 undoTextChanged(undoText());-
221 canRedoChanged(canRedo());-
222 redoTextChanged(redoText());-
223 }
never executed: end of block
0
224 }
never executed: end of block
 else {		0
225 if (macro
macroDescription
TRUEnever evaluated
FALSEnever evaluated
) {		0
226 d->macro_stack.lastconstLast()->d->child_list.append(cmd);-
227 }
never executed: end of block
 else {		0
228 d->command_list.append(cmd);-
229 d->checkUndoLimit();-
230 d->setIndex(d->index + 1, false);-
231 }
never executed: end of block
0
232 }-
233}-
234void QUndoStack::setClean()-
235{-
236 QUndoStackPrivate * const d = d_func();-
237 if (!(__builtin_expect(!!(!
__builtin_expe...pty()), false)Description
TRUEnever evaluated
FALSEnever evaluated
d->macro_stack.isEmpty())()), false)
__builtin_expe...pty()), false)Description
TRUEnever evaluated
FALSEnever evaluated
) {		0
238 QMessageLogger(__FILE__, 639645, __PRETTY_FUNCTION__).warning("QUndoStack::setClean(): cannot set clean in the middle of a macro");-
239 return;
never executed: return;
0
240 }-
241-
242 d->setIndex(d->index, true);-
243}
never executed: end of block
0
244-
245-
246-
247-
248-
249-
250-
251bool QUndoStack::isClean() const-
252{-
253 const QUndoStackPrivate * const d = d_func();-
254 if (!d->macro_stack.isEmpty())-
255 return false;-
256 return d->clean_index == d->index;-
257}-
258int QUndoStack::cleanIndex() const-
259{-
260 const QUndoStackPrivate * const d = d_func();-
261 return d->clean_index;-
262}-
263void QUndoStack::undo()-
264{-
265 QUndoStackPrivate * const d = d_func();-
266 if (d->index == 0
d->index == 0Description
TRUEnever evaluated
FALSEnever evaluated
)		0
267 return;
never executed: return;
0
268-
269 if (!(__builtin_expect(!!(!
__builtin_expe...pty()), false)Description
TRUEnever evaluated
FALSEnever evaluated
d->macro_stack.isEmpty())()), false)
__builtin_expe...pty()), false)Description
TRUEnever evaluated
FALSEnever evaluated
) {		0
270 QMessageLogger(__FILE__, 694700, __PRETTY_FUNCTION__).warning("QUndoStack::undo(): cannot undo in the middle of a macro");-
271 return;
never executed: return;
0
272 }-
273-
274 int idx = d->index - 1;-
275 d->command_list.at(idx)->undo();-
276 d->setIndex(idx, false);-
277}
never executed: end of block
0
278void QUndoStack::redo()-
279{-
280 QUndoStackPrivate * const d = d_func();-
281 if (d->index == d->command_list.size()
d->index == d-...nd_list.size()Description
TRUEnever evaluated
FALSEnever evaluated
)		0
282 return;
never executed: return;
0
283-
284 if (!(__builtin_expect(!!(!
__builtin_expe...pty()), false)Description
TRUEnever evaluated
FALSEnever evaluated
d->macro_stack.isEmpty())()), false)
__builtin_expe...pty()), false)Description
TRUEnever evaluated
FALSEnever evaluated
) {		0
285 QMessageLogger(__FILE__, 720726, __PRETTY_FUNCTION__).warning("QUndoStack::redo(): cannot redo in the middle of a macro");-
286 return;
never executed: return;
0
287 }-
288-
289 d->command_list.at(d->index)->redo();-
290 d->setIndex(d->index + 1, false);-
291}
never executed: end of block
0
292int QUndoStack::count() const-
293{-
294 const QUndoStackPrivate * const d = d_func();-
295 return d->command_list.size();-
296}-
297int QUndoStack::index() const-
298{-
299 const QUndoStackPrivate * const d = d_func();-
300 return d->index;-
301}-
302void QUndoStack::setIndex(int idx)-
303{-
304 QUndoStackPrivate * const d = d_func();-
305 if (!(__builtin_expect(!!(!
__builtin_expe...pty()), false)Description
TRUEnever evaluated
FALSEnever evaluated
d->macro_stack.isEmpty())()), false)
__builtin_expe...pty()), false)Description
TRUEnever evaluated
FALSEnever evaluated
) {		0
306 QMessageLogger(__FILE__, 767773, __PRETTY_FUNCTION__).warning("QUndoStack::setIndex(): cannot set index in the middle of a macro");-
307 return;
never executed: return;
0
308 }-
309-
310 if (idx < 0
idx < 0Description
TRUEnever evaluated
FALSEnever evaluated
)		0
311 idx = 0;
never executed: idx = 0;
0
312 else if (idx > d->command_list.size()
idx > d->command_list.size()Description
TRUEnever evaluated
FALSEnever evaluated
)		0
313 idx = d->command_list.size();
never executed: idx = d->command_list.size();
0
314-
315 int i = d->index;-
316 while (i < idx
i < idxDescription
TRUEnever evaluated
FALSEnever evaluated
)		0
317 d->command_list.at(i++)->redo();
never executed: d->command_list.at(i++)->redo();
0
318 while (i > idx
i > idxDescription
TRUEnever evaluated
FALSEnever evaluated
)		0
319 d->command_list.at(--i)->undo();
never executed: d->command_list.at(--i)->undo();
0
320-
321 d->setIndex(idx, false);-
322}
never executed: end of block
0
323bool QUndoStack::canUndo() const-
324{-
325 const QUndoStackPrivate * const d = d_func();-
326 if (!d->macro_stack.isEmpty())-
327 return false;-
328 return d->index > 0;-
329}-
330bool QUndoStack::canRedo() const-
331{-
332 const QUndoStackPrivate * const d = d_func();-
333 if (!d->macro_stack.isEmpty())-
334 return false;-
335 return d->index < d->command_list.size();-
336}-
337-
338-
339-
340-
341-
342-
343-
344QString QUndoStack::undoText() const-
345{-
346 const QUndoStackPrivate * const d = d_func();-
347 if (!d->macro_stack.isEmpty())-
348 return QString();-
349 if (d->index > 0)-
350 return d->command_list.at(d->index - 1)->actionText();-
351 return QString();-
352}-
353-
354-
355-
356-
357-
358-
359-
360QString QUndoStack::redoText() const-
361{-
362 const QUndoStackPrivate * const d = d_func();-
363 if (!d->macro_stack.isEmpty())-
364 return QString();-
365 if (d->index < d->command_list.size())-
366 return d->command_list.at(d->index)->actionText();-
367 return QString();-
368}-
369QAction *QUndoStack::createUndoAction(QObject *parent, const QString &prefix) const-
370{-
371 QUndoAction *result = new QUndoAction(prefix, parent);-
372 if (prefix.isEmpty())-
373 result->setTextFormat(tr("Undo %1"), tr("Undo", "Default text for undo action"));-
374-
375 result->setEnabled(canUndo());-
376 result->setPrefixedText(undoText());-
377 connect(this, qFlagLocation("2""canUndoChanged(bool)" "\0" __FILE__ ":" "879""885"),-
378 result, qFlagLocation("1""setEnabled(bool)" "\0" __FILE__ ":" "880""886"));-
379 connect(this, qFlagLocation("2""undoTextChanged(QString)" "\0" __FILE__ ":" "881""887"),-
380 result, qFlagLocation("1""setPrefixedText(QString)" "\0" __FILE__ ":" "882""888"));-
381 connect(result, qFlagLocation("2""triggered()" "\0" __FILE__ ":" "883""889"), this, qFlagLocation("1""undo()" "\0" __FILE__ ":" "883""889"));-
382 return result;-
383}-
384QAction *QUndoStack::createRedoAction(QObject *parent, const QString &prefix) const-
385{-
386 QUndoAction *result = new QUndoAction(prefix, parent);-
387 if (prefix.isEmpty())-
388 result->setTextFormat(tr("Redo %1"), tr("Redo", "Default text for redo action"));-
389-
390 result->setEnabled(canRedo());-
391 result->setPrefixedText(redoText());-
392 connect(this, qFlagLocation("2""canRedoChanged(bool)" "\0" __FILE__ ":" "909""915"),-
393 result, qFlagLocation("1""setEnabled(bool)" "\0" __FILE__ ":" "910""916"));-
394 connect(this, qFlagLocation("2""redoTextChanged(QString)" "\0" __FILE__ ":" "911""917"),-
395 result, qFlagLocation("1""setPrefixedText(QString)" "\0" __FILE__ ":" "912""918"));-
396 connect(result, qFlagLocation("2""triggered()" "\0" __FILE__ ":" "913""919"), this, qFlagLocation("1""redo()" "\0" __FILE__ ":" "913""919"));-
397 return result;-
398}-
399void QUndoStack::beginMacro(const QString &text)-
400{-
401 QUndoStackPrivate * const d = d_func();-
402 QUndoCommand *cmd = new QUndoCommand();-
403 cmd->setText(text);-
404-
405 if (d->macro_stack.isEmpty()
d->macro_stack.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
) {		0
406 while (d->index < d->command_list.size()
d->index < d->...nd_list.size()Description
TRUEnever evaluated
FALSEnever evaluated
)		0
407 delete d->command_list.takeLast();
never executed: delete d->command_list.takeLast();
0
408 if (d->clean_index > d->index
d->clean_index > d->indexDescription
TRUEnever evaluated
FALSEnever evaluated
)		0
409 d->clean_index = -1;
never executed: d->clean_index = -1;
0
410 d->command_list.append(cmd);-
411 }
never executed: end of block
 else {		0
412 d->macro_stack.lastconstLast()->d->child_list.append(cmd);-
413 }
never executed: end of block
0
414 d->macro_stack.append(cmd);-
415-
416 if (d->macro_stack.count() == 1
d->macro_stack.count() == 1Description
TRUEnever evaluated
FALSEnever evaluated
) {		0
417 canUndoChanged(false);-
418 undoTextChanged(QString());-
419 canRedoChanged(false);-
420 redoTextChanged(QString());-
421 }
never executed: end of block
0
422}
never executed: end of block
0
423void QUndoStack::endMacro()-
424{-
425 QUndoStackPrivate * const d = d_func();-
426 if (__builtin_expect(!!(
__builtin_expe...pty()), false)Description
TRUEnever evaluated
FALSEnever evaluated
d->macro_stack.isEmpty())()), false)
__builtin_expe...pty()), false)Description
TRUEnever evaluated
FALSEnever evaluated
) {		0
427 QMessageLogger(__FILE__, 987993, __PRETTY_FUNCTION__).warning("QUndoStack::endMacro(): no matching beginMacro()");-
428 return;
never executed: return;
0
429 }-
430-
431 d->macro_stack.removeLast();-
432-
433 if (d->macro_stack.isEmpty()
d->macro_stack.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
) {		0
434 d->checkUndoLimit();-
435 d->setIndex(d->index + 1, false);-
436 }
never executed: end of block
0
437}
never executed: end of block
0
438const QUndoCommand *QUndoStack::command(int index) const-
439{-
440 const QUndoStackPrivate * const d = d_func();-
441-
442 if (index < 0 || index >= d->command_list.count())-
443 return 0;-
444 return d->command_list.at(index);-
445}-
446-
447-
448-
449-
450-
451-
452-
453QString QUndoStack::text(int idx) const-
454{-
455 const QUndoStackPrivate * const d = d_func();-
456-
457 if (idx < 0 || idx >= d->command_list.size())-
458 return QString();-
459 return d->command_list.at(idx)->text();-
460}-
461void QUndoStack::setUndoLimit(int limit)-
462{-
463 QUndoStackPrivate * const d = d_func();-
464-
465 if (!(__builtin_expect(!!(!
__builtin_expe...pty()), false)Description
TRUEnever evaluated
FALSEnever evaluated
d->command_list.isEmpty())()), false)
__builtin_expe...pty()), false)Description
TRUEnever evaluated
FALSEnever evaluated
) {		0
466 QMessageLogger(__FILE__, 10551061, __PRETTY_FUNCTION__).warning("QUndoStack::setUndoLimit(): an undo limit can only be set when the stack is empty");-
467 return;
never executed: return;
0
468 }-
469-
470 if (limit == d->undo_limit
limit == d->undo_limitDescription
TRUEnever evaluated
FALSEnever evaluated
)		0
471 return;
never executed: return;
0
472 d->undo_limit = limit;-
473 d->checkUndoLimit();-
474}
never executed: end of block
0
475-
476int QUndoStack::undoLimit() const-
477{-
478 const QUndoStackPrivate * const d = d_func();-
479-
480 return d->undo_limit;-
481}-
482void QUndoStack::setActive(bool active)-
483{-
484-
485-
486-
487 QUndoStackPrivate * const d = d_func();-
488-
489 if (d->group != 0) {-
490 if (active)-
491 d->group->setActiveStack(this);-
492 else if (d->group->activeStack() == this)-
493 d->group->setActiveStack(0);-
494 }-
495-
496}-
497-
498bool QUndoStack::isActive() const-
499{-
500-
501-
502-
503 const QUndoStackPrivate * const d = d_func();-
504 return d->group == 0 || d->group->activeStack() == this;-
505-
506}-
507-
508-
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