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