void SwapFile::fileLoaded(const QString&)
{
// look for swap file
if (!updateFileName())
return;
if (!m_swapfile.exists())
{
kDebug (13020) << "No swap file";
return;
}
if (!QFileInfo(m_swapfile).isReadable())
{
kWarning( 13020 ) << "Can't open swap file (missing permissions)";
return;
}
// sanity check
QFile peekFile(fileName());
if (peekFile.open(QIODevice::ReadOnly)) {
QDataStream stream(&peekFile);
if (!isValidSwapFile(stream, true)) {
removeSwapFile();
return;
}
peekFile.close();
} else {
kWarning( 13020 ) << "Can't open swap file:" << fileName();
return;
}
// show swap file message
m_document->setReadWrite(false);
showSwapFileMessage();
}
bool SwapFile::recover(QDataStream& stream, bool checkDigest)
{
if (!isValidSwapFile(stream, checkDigest)) {
return false;
}
// disconnect current signals
setTrackingEnabled(false);
// needed to set undo/redo cursors in a sane way
bool firstEditInGroup = false;
KTextEditor::Cursor undoCursor = KTextEditor::Cursor::invalid();
KTextEditor::Cursor redoCursor = KTextEditor::Cursor::invalid();
// replay swapfile
bool editRunning = false;
bool brokenSwapFile = false;
while (!stream.atEnd()) {
if (brokenSwapFile)
break;
qint8 type;
stream >> type;
switch (type) {
case EA_StartEditing: {
m_document->editStart();
editRunning = true;
firstEditInGroup = true;
undoCursor = KTextEditor::Cursor::invalid();
redoCursor = KTextEditor::Cursor::invalid();
break;
}
case EA_FinishEditing: {
m_document->editEnd();
// empty editStart() / editEnd() groups exist: only set cursor if required
if (!firstEditInGroup) {
// set undo/redo cursor of last KateUndoGroup of the undo manager
m_document->undoManager()->setUndoRedoCursorsOfLastGroup(undoCursor, redoCursor);
m_document->undoManager()->undoSafePoint();
}
firstEditInGroup = false;
editRunning = false;
break;
}
case EA_WrapLine: {
if (!editRunning) {
brokenSwapFile = true;
break;
}
int line = 0, column = 0;
stream >> line >> column;
// emulate buffer unwrapLine with document
m_document->editWrapLine(line, column, true);
// track undo/redo cursor
if (firstEditInGroup) {
firstEditInGroup = false;
undoCursor = KTextEditor::Cursor(line, column);
}
redoCursor = KTextEditor::Cursor(line + 1, 0);
break;
}
case EA_UnwrapLine: {
if (!editRunning) {
brokenSwapFile = true;
break;
}
int line = 0;
stream >> line;
// assert valid line
Q_ASSERT (line > 0);
const int undoColumn = m_document->lineLength(line - 1);
// emulate buffer unwrapLine with document
m_document->editUnWrapLine(line - 1, true, 0);
// track undo/redo cursor
if (firstEditInGroup) {
firstEditInGroup = false;
undoCursor = KTextEditor::Cursor(line, 0);
}
redoCursor = KTextEditor::Cursor(line - 1, undoColumn);
break;
}
case EA_InsertText: {
if (!editRunning) {
brokenSwapFile = true;
break;
}
int line, column;
QByteArray text;
stream >> line >> column >> text;
m_document->insertText(KTextEditor::Cursor(line, column), QString::fromUtf8 (text.data (), text.size()));
// track undo/redo cursor
if (firstEditInGroup) {
firstEditInGroup = false;
undoCursor = KTextEditor::Cursor(line, column);
}
redoCursor = KTextEditor::Cursor(line, column + text.size());
break;
}
case EA_RemoveText: {
if (!editRunning) {
brokenSwapFile = true;
break;
}
int line, startColumn, endColumn;
stream >> line >> startColumn >> endColumn;
m_document->removeText (KTextEditor::Range(KTextEditor::Cursor(line, startColumn), KTextEditor::Cursor(line, endColumn)));
// track undo/redo cursor
if (firstEditInGroup) {
firstEditInGroup = false;
undoCursor = KTextEditor::Cursor(line, endColumn);
}
redoCursor = KTextEditor::Cursor(line, startColumn);
break;
}
default: {
kWarning( 13020 ) << "Unknown type:" << type;
}
}
}
// balanced editStart and editEnd?
if (editRunning) {
brokenSwapFile = true;
m_document->editEnd();
}
// warn the user if the swap file is not complete
if (brokenSwapFile) {
kWarning ( 13020 ) << "Some data might be lost";
} else {
// set sane final cursor, if possible
KTextEditor::View * view = m_document->activeView();
redoCursor = m_document->undoManager()->lastRedoCursor();
if (view && redoCursor.isValid()) {
view->setCursorPosition(redoCursor);
}
}
// reconnect the signals
setTrackingEnabled(true);
return true;
}
bool SwapFile::recover(QDataStream& stream, bool checkDigest)
{
if (!isValidSwapFile(stream, checkDigest)) {
return false;
}
// disconnect current signals
setTrackingEnabled(false);
// replay swapfile
bool editStarted = false;
bool brokenSwapFile = false;
while (!stream.atEnd()) {
if (brokenSwapFile)
break;
qint8 type;
stream >> type;
switch (type) {
case EA_StartEditing: {
m_document->editStart();
editStarted = true;
break;
}
case EA_FinishEditing: {
m_document->editEnd();
editStarted = false;
break;
}
case EA_WrapLine: {
if (!editStarted) {
brokenSwapFile = true;
break;
}
int line = 0, column = 0;
stream >> line >> column;
// emulate buffer unwrapLine with document
m_document->editWrapLine(line, column, true);
break;
}
case EA_UnwrapLine: {
if (!editStarted) {
brokenSwapFile = true;
break;
}
int line = 0;
stream >> line;
// assert valid line
Q_ASSERT (line > 0);
// emulate buffer unwrapLine with document
m_document->editUnWrapLine(line - 1, true, 0);
break;
}
case EA_InsertText: {
if (!editStarted) {
brokenSwapFile = true;
break;
}
int line, column;
QByteArray text;
stream >> line >> column >> text;
m_document->insertText(KTextEditor::Cursor(line, column), QString::fromUtf8 (text.data (), text.size()));
break;
}
case EA_RemoveText: {
if (!editStarted) {
brokenSwapFile = true;
break;
}
int line, startColumn, endColumn;
stream >> line >> startColumn >> endColumn;
m_document->removeText (KTextEditor::Range(KTextEditor::Cursor(line, startColumn), KTextEditor::Cursor(line, endColumn)));
break;
}
default: {
kWarning( 13020 ) << "Unknown type:" << type;
}
}
}
// balance editStart and editEnd
if (editStarted) {
brokenSwapFile = true;
m_document->editEnd();
}
// warn the user if the swap file is not complete
if (brokenSwapFile) {
kWarning ( 13020 ) << "Some data might be lost";
}
// reconnect the signals
setTrackingEnabled(true);
return true;
}
