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#include "commands.h"
CharCommand::CharCommand(XByteArray * xData, Cmd cmd, int charPos, char newChar, QUndoCommand *parent)
: QUndoCommand(parent)
{
_xData = xData;
_charPos = charPos;
_newChar = newChar;
_cmd = cmd;
}
bool CharCommand::mergeWith(const QUndoCommand *command)
{
const CharCommand *nextCommand = static_cast<const CharCommand *>(command);
bool result = false;
if (_cmd != remove)
{
if (nextCommand->_cmd == replace)
if (nextCommand->_charPos == _charPos)
{
_newChar = nextCommand->_newChar;
result = true;
}
}
return result;
}
void CharCommand::undo()
{
switch (_cmd)
{
case insert:
_xData->remove(_charPos, 1);
break;
case replace:
_xData->replace(_charPos, _oldChar);
_xData->setDataChanged(_charPos, _wasChanged);
break;
case remove:
_xData->insert(_charPos, _oldChar);
_xData->setDataChanged(_charPos, _wasChanged);
break;
}
}
void CharCommand::redo()
{
switch (_cmd)
{
case insert:
_xData->insert(_charPos, _newChar);
break;
case replace:
_oldChar = _xData->data()[_charPos];
_wasChanged = _xData->dataChanged(_charPos);
_xData->replace(_charPos, _newChar);
break;
case remove:
_oldChar = _xData->data()[_charPos];
_wasChanged = _xData->dataChanged(_charPos);
_xData->remove(_charPos, 1);
break;
}
}
ArrayCommand::ArrayCommand(XByteArray * xData, Cmd cmd, int baPos, QByteArray newBa, int len, QUndoCommand *parent)
: QUndoCommand(parent)
{
_cmd = cmd;
_xData = xData;
_baPos = baPos;
_newBa = newBa;
_len = len;
}
void ArrayCommand::undo()
{
switch (_cmd)
{
case insert:
_xData->remove(_baPos, _newBa.length());
break;
case replace:
_xData->replace(_baPos, _oldBa);
_xData->setDataChanged(_baPos, _wasChanged);
break;
case remove:
_xData->insert(_baPos, _oldBa);
_xData->setDataChanged(_baPos, _wasChanged);
break;
}
}
void ArrayCommand::redo()
{
switch (_cmd)
{
case insert:
_xData->insert(_baPos, _newBa);
break;
case replace:
_oldBa = _xData->data().mid(_baPos, _len);
_wasChanged = _xData->dataChanged(_baPos, _len);
_xData->replace(_baPos, _newBa);
break;
case remove:
_oldBa = _xData->data().mid(_baPos, _len);
_wasChanged = _xData->dataChanged(_baPos, _len);
_xData->remove(_baPos, _len);
break;
}
}
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