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Fixes: fakevim: better undo behaviour

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Details:  prevent creation of empty "groups" that required
additional 'u' key strokes to 'undo'
This commit is contained in:
hjk
2009-01-21 16:18:20 +01:00
parent a18770548e
commit 7ce2676c6a
1 changed files with 48 additions and 43 deletions
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91
src/plugins/fakevim/fakevimhandler.cpp
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@@ -137,20 +137,20 @@ enum MoveType
struct EditOperation
{
EditOperation() : m_position(-1), m_itemCount(0) {}
int m_position;
int m_itemCount; // used to combine several operations
QString m_from;
QString m_to;
EditOperation() : position(-1), itemCount(0) {}
int position;
int itemCount; // used to combine several operations
QString from;
QString to;
};
QDebug &operator<<(QDebug &ts, const EditOperation &op)
{
if (op.m_itemCount > 0) {
ts << "\n EDIT BLOCK WITH " << op.m_itemCount << " ITEMS";
if (op.itemCount > 0) {
ts << "\n EDIT BLOCK WITH " << op.itemCount << " ITEMS";
} else {
ts << "\n EDIT AT " << op.m_position
<< "\n FROM " << op.m_from << "\n TO " << op.m_to;
ts << "\n EDIT AT " << op.position
<< "\n FROM " << op.from << "\n TO " << op.to;
}
return ts;
}
@@ -1357,9 +1357,9 @@ void FakeVimHandler::Private::handleExCommand(const QString &cmd0)
m_tc.setPosition(positionForLine(beginLine));
EditOperation op;
// FIXME: broken for "upward selection"
op.m_position = m_tc.position();
op.m_from = text;
op.m_to = result;
op.position = m_tc.position();
op.from = text;
op.to = result;
recordOperation(op);
enterCommandMode();
@@ -1757,18 +1757,18 @@ void FakeVimHandler::Private::undo()
} else {
EditOperation op = m_undoStack.pop();
//qDebug() << "UNDO " << op;
if (op.m_itemCount > 0) {
for (int i = op.m_itemCount; --i >= 0; )
if (op.itemCount > 0) {
for (int i = op.itemCount; --i >= 0; )
undo();
} else {
m_tc.setPosition(op.m_position, MoveAnchor);
if (!op.m_to.isEmpty()) {
m_tc.setPosition(op.m_position + op.m_to.size(), KeepAnchor);
m_tc.setPosition(op.position, MoveAnchor);
if (!op.to.isEmpty()) {
m_tc.setPosition(op.position + op.to.size(), KeepAnchor);
m_tc.deleteChar();
}
if (!op.m_from.isEmpty())
m_tc.insertText(op.m_from);
m_tc.setPosition(op.m_position, MoveAnchor);
if (!op.from.isEmpty())
m_tc.insertText(op.from);
m_tc.setPosition(op.position, MoveAnchor);
}
m_redoStack.push(op);
showBlackMessage(QString());
@@ -1786,18 +1786,18 @@ void FakeVimHandler::Private::redo()
} else {
EditOperation op = m_redoStack.pop();
//qDebug() << "REDO " << op;
if (op.m_itemCount > 0) {
for (int i = op.m_itemCount; --i >= 0; )
if (op.itemCount > 0) {
for (int i = op.itemCount; --i >= 0; )
redo();
} else {
m_tc.setPosition(op.m_position, MoveAnchor);
if (!op.m_from.isEmpty()) {
m_tc.setPosition(op.m_position + op.m_from.size(), KeepAnchor);
m_tc.setPosition(op.position, MoveAnchor);
if (!op.from.isEmpty()) {
m_tc.setPosition(op.position + op.from.size(), KeepAnchor);
m_tc.deleteChar();
}
if (!op.m_to.isEmpty())
m_tc.insertText(op.m_to);
m_tc.setPosition(op.m_position, MoveAnchor);
if (!op.to.isEmpty())
m_tc.insertText(op.to);
m_tc.setPosition(op.position, MoveAnchor);
}
m_undoStack.push(op);
showBlackMessage(QString());
@@ -1810,15 +1810,15 @@ void FakeVimHandler::Private::recordBeginGroup()
//qDebug() << "PUSH";
m_undoGroupStack.push(m_undoStack.size());
EditOperation op;
op.m_position = m_tc.position();
op.position = m_tc.position();
recordOperation(op);
}
void FakeVimHandler::Private::recordEndGroup()
{
EditOperation op;
op.m_itemCount = m_undoStack.size() - m_undoGroupStack.pop();
//qDebug() << "POP " << op.m_itemCount;
op.itemCount = m_undoStack.size() - m_undoGroupStack.pop();
//qDebug() << "POP " << op.itemCount << m_undoStack;
recordOperation(op);
}
@@ -1831,12 +1831,12 @@ QString FakeVimHandler::Private::recordRemoveSelectedText()
return QString();
m_tc.setPosition(anchor(), MoveAnchor);
m_tc.setPosition(pos, KeepAnchor);
op.m_position = qMin(pos, anchor());
op.m_from = m_tc.selection().toPlainText();
op.position = qMin(pos, anchor());
op.from = m_tc.selection().toPlainText();
//qDebug() << "OP: " << op;
recordOperation(op);
m_tc.deleteChar();
return op.m_from;
return op.from;
}
void FakeVimHandler::Private::recordRemoveNextChar()
@@ -1849,15 +1849,20 @@ void FakeVimHandler::Private::recordRemoveNextChar()
void FakeVimHandler::Private::recordInsertText(const QString &data)
{
EditOperation op;
op.m_position = m_tc.position();
op.m_to = data;
op.position = m_tc.position();
op.to = data;
recordOperation(op);
m_tc.insertText(data);
}
void FakeVimHandler::Private::recordOperation(const EditOperation &op)
{
//qDebug() << "OP: " << op;
// No need to record operations that actually do not change anything.
if (op.from.isEmpty() && op.to.isEmpty() && op.itemCount == 0)
return;
// No need to create groups with only one member.
if (op.itemCount == 1)
return;
m_undoStack.push(op);
m_redoStack.clear();
}
@@ -1865,16 +1870,16 @@ void FakeVimHandler::Private::recordOperation(const EditOperation &op)
void FakeVimHandler::Private::recordMove(int position, int nestedCount)
{
EditOperation op;
op.m_position = position;
op.m_itemCount = nestedCount;
op.position = position;
op.itemCount = nestedCount;
recordOperation(op);
}
void FakeVimHandler::Private::recordInsert(int position, const QString &data)
{
EditOperation op;
op.m_position = position;
op.m_to = data;
op.position = position;
op.to = data;
recordOperation(op);
}
@@ -1889,8 +1894,8 @@ void FakeVimHandler::Private::recordRemove(int position, int length)
void FakeVimHandler::Private::recordRemove(int position, const QString &data)
{
EditOperation op;
op.m_position = position;
op.m_from = data;
op.position = position;
op.from = data;
recordOperation(op);
}