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authorErik Verbruggen <erik.verbruggen@nokia.com>2010-02-09 13:30:08 (GMT)
committerOswald Buddenhagen <oswald.buddenhagen@nokia.com>2010-02-09 13:53:37 (GMT)
commit54290ef776a311f0c303e2a8df4de5e39e9a032a (patch)
treee7131c2f90e6d9a121a656671e4e6e6a07efb889 /src
parent4710521ab62540378816d3888936eace9686ff97 (diff)
downloadQt-54290ef776a311f0c303e2a8df4de5e39e9a032a.zip
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Added method to clear the undo/redo stacks.
Reviewed-by: mae
Diffstat (limited to 'src')
-rw-r--r--src/gui/text/qtextdocument.cpp17
-rw-r--r--src/gui/text/qtextdocument.h7
-rw-r--r--src/gui/text/qtextdocument_p.cpp62
-rw-r--r--src/gui/text/qtextdocument_p.h3
4 files changed, 67 insertions, 22 deletions
diff --git a/src/gui/text/qtextdocument.cpp b/src/gui/text/qtextdocument.cpp
index b8c9b94..80931c9 100644
--- a/src/gui/text/qtextdocument.cpp
+++ b/src/gui/text/qtextdocument.cpp
@@ -436,6 +436,23 @@ void QTextDocument::redo(QTextCursor *cursor)
}
/*!
+ \since 4.7
+ Clears the specified stacks.
+
+ This method clears any commands on the undo stack, the redo stack, or both (the
+ default). If any commands got cleared, the appropriate signals
+ (\a QTextDocument::undoAvailable or \a QTextDocument::redoAvailable) get
+ emitted.
+
+ \sa QTextDocument::undoAvailable QTextDocument::redoAvailable
+*/
+void QTextDocument::clearUndoRedoStacks(Stacks stacksToClear)
+{
+ Q_D(QTextDocument);
+ d->clearUndoRedoStacks(stacksToClear, true);
+}
+
+/*!
\overload
*/
diff --git a/src/gui/text/qtextdocument.h b/src/gui/text/qtextdocument.h
index b5bcb41..0140772 100644
--- a/src/gui/text/qtextdocument.h
+++ b/src/gui/text/qtextdocument.h
@@ -256,6 +256,13 @@ public:
void undo(QTextCursor *cursor);
void redo(QTextCursor *cursor);
+ enum Stacks {
+ UndoStack = 0x01,
+ RedoStack = 0x02,
+ UndoAndRedoStacks = UndoStack | RedoStack
+ };
+ void clearUndoRedoStacks(Stacks historyToClear = UndoAndRedoStacks);
+
int maximumBlockCount() const;
void setMaximumBlockCount(int maximum);
diff --git a/src/gui/text/qtextdocument_p.cpp b/src/gui/text/qtextdocument_p.cpp
index 372b9dc..b36642b 100644
--- a/src/gui/text/qtextdocument_p.cpp
+++ b/src/gui/text/qtextdocument_p.cpp
@@ -260,7 +260,7 @@ void QTextDocumentPrivate::clear()
title.clear();
undoState = 0;
- truncateUndoStack();
+ clearUndoRedoStacks(QTextDocument::UndoStack);
text = QString();
unreachableCharacterCount = 0;
modifiedState = 0;
@@ -292,7 +292,7 @@ QTextDocumentPrivate::~QTextDocumentPrivate()
cursors.clear();
undoState = 0;
undoEnabled = true;
- truncateUndoStack();
+ clearUndoRedoStacks(QTextDocument::UndoStack);
}
void QTextDocumentPrivate::setLayout(QAbstractTextDocumentLayout *layout)
@@ -1027,7 +1027,7 @@ void QTextDocumentPrivate::appendUndoItem(const QTextUndoCommand &c)
if (!undoEnabled)
return;
if (undoState < undoStack.size())
- truncateUndoStack();
+ clearUndoRedoStacks(QTextDocument::UndoStack);
if (!undoStack.isEmpty() && modified) {
QTextUndoCommand &last = undoStack[undoState - 1];
@@ -1050,26 +1050,46 @@ void QTextDocumentPrivate::appendUndoItem(const QTextUndoCommand &c)
emit document()->undoCommandAdded();
}
-void QTextDocumentPrivate::truncateUndoStack()
+void QTextDocumentPrivate::clearUndoRedoStacks(QTextDocument::Stacks stacksToClear,
+ bool emitSignals)
{
- if (undoState == undoStack.size())
- return;
-
- for (int i = undoState; i < undoStack.size(); ++i) {
- QTextUndoCommand c = undoStack[i];
- if (c.command & QTextUndoCommand::Removed) {
- // ########
-// QTextFragment *f = c.fragment_list;
-// while (f) {
-// QTextFragment *n = f->right;
-// delete f;
-// f = n;
-// }
- } else if (c.command & QTextUndoCommand::Custom) {
- delete c.custom;
+ bool undoCommandsAvailable = undoState != 0;
+ bool redoCommandsAvailable = undoState != undoStack.size();
+ if (stacksToClear == QTextDocument::UndoStack && undoCommandsAvailable) {
+ for (int i = 0; i < undoState; ++i) {
+ QTextUndoCommand c = undoStack[undoState];
+ if (c.command & QTextUndoCommand::Custom)
+ delete c.custom;
+ }
+ undoStack.remove(0, undoState);
+ undoStack.resize(undoStack.size() - undoState);
+ undoState = 0;
+ if (emitSignals)
+ emitUndoAvailable(false);
+ } else if (stacksToClear == QTextDocument::RedoStack
+ && redoCommandsAvailable) {
+ for (int i = undoState; i < undoStack.size(); ++i) {
+ QTextUndoCommand c = undoStack[i];
+ if (c.command & QTextUndoCommand::Custom)
+ delete c.custom;
+ }
+ undoStack.resize(undoState);
+ if (emitSignals)
+ emitRedoAvailable(false);
+ } else if (stacksToClear == QTextDocument::UndoAndRedoStacks
+ && (undoCommandsAvailable || redoCommandsAvailable)) {
+ for (int i = 0; i < undoStack.size(); ++i) {
+ QTextUndoCommand c = undoStack[i];
+ if (c.command & QTextUndoCommand::Custom)
+ delete c.custom;
}
+ undoState = 0;
+ undoStack.resize(0);
+ if (emitSignals && undoCommandsAvailable)
+ emitUndoAvailable(false);
+ if (emitSignals && redoCommandsAvailable)
+ emitRedoAvailable(false);
}
- undoStack.resize(undoState);
}
void QTextDocumentPrivate::emitUndoAvailable(bool available)
@@ -1097,7 +1117,7 @@ void QTextDocumentPrivate::enableUndoRedo(bool enable)
if (!enable) {
undoState = 0;
- truncateUndoStack();
+ clearUndoRedoStacks(QTextDocument::UndoStack);
emitUndoAvailable(false);
emitRedoAvailable(false);
}
diff --git a/src/gui/text/qtextdocument_p.h b/src/gui/text/qtextdocument_p.h
index 4ecc2fa..ac5ed3c 100644
--- a/src/gui/text/qtextdocument_p.h
+++ b/src/gui/text/qtextdocument_p.h
@@ -252,10 +252,11 @@ public:
inline QFont defaultFont() const { return formats.defaultFont(); }
inline void setDefaultFont(const QFont &f) { formats.setDefaultFont(f); }
+ void clearUndoRedoStacks(QTextDocument::Stacks stacksToClear, bool emitSignals = false);
+
private:
bool split(int pos);
bool unite(uint f);
- void truncateUndoStack();
void insert_string(int pos, uint strPos, uint length, int format, QTextUndoCommand::Operation op);
int insert_block(int pos, uint strPos, int format, int blockformat, QTextUndoCommand::Operation op, int command);