93 lines
3.5 KiB
C++
93 lines
3.5 KiB
C++
/*==============================================================================
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** Copyright (C) 2024-2027 WingSummer
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**
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** This program is free software: you can redistribute it and/or modify it under
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** the terms of the GNU Affero General Public License as published by the Free
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** Software Foundation, version 3.
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**
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** This program is distributed in the hope that it will be useful, but WITHOUT
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** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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** FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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** details.
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**
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** You should have received a copy of the GNU Affero General Public License
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** along with this program. If not, see <https://www.gnu.org/licenses/>.
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**
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** The original License is MIT from Dax89/QHexView. I have modified a lot so I
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** decide to change the Open Source License. You can use the original library
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** under MIT. Thanks for Dax89's efforts.
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** =============================================================================
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*/
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#include "replacecommand.h"
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#include "document/qhexdocument.h"
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ReplaceCommand::ReplaceCommand(QHexDocument *doc, qsizetype offset,
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const QByteArray &data, QHexCursor *cursor,
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int nibbleindex, QUndoCommand *parent)
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: HexCommand(tr("[HexReplace] pos: %1").arg(offset), doc, cursor,
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nibbleindex, parent) {
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m_offset = offset;
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m_data = data;
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m_length = data.length();
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m_olddata = doc->read(m_offset, m_length);
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}
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void ReplaceCommand::undo() {
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m_doc->_replace(m_offset, m_olddata);
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m_cursor->setPos(m_offset, m_nibbleindex);
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}
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void ReplaceCommand::redo() {
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m_doc->_replace(m_offset, m_data);
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if (m_data.length() == 1 && m_nibbleindex) {
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m_cursor->setPos(m_offset, 0);
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} else {
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m_cursor->setPos(m_offset + m_length, !m_nibbleindex);
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}
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}
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int ReplaceCommand::id() const { return UndoID_HexReplaceInsert; }
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bool ReplaceCommand::mergeWith(const QUndoCommand *other) {
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auto ucmd = dynamic_cast<const ReplaceCommand *>(other);
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if (ucmd) {
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if (this->m_offset == ucmd->m_offset) {
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if (this->m_length <= ucmd->m_length) {
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this->m_olddata = ucmd->m_olddata;
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this->m_data = ucmd->m_data;
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this->m_length = ucmd->m_length;
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} else {
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this->m_data.replace(0, ucmd->m_length, ucmd->m_data);
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}
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return true;
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}
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if (this->m_offset + this->m_length == ucmd->m_offset) {
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this->m_length += ucmd->m_offset;
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this->m_data.append(ucmd->m_data);
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this->m_olddata.append(ucmd->m_olddata);
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this->m_nibbleindex = ucmd->m_nibbleindex;
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return true;
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}
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if (this->m_offset <= ucmd->m_offset &&
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this->m_offset + m_length >= ucmd->m_offset + ucmd->m_length) {
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auto dis = ucmd->m_offset - this->m_offset;
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this->m_data.replace(dis, ucmd->m_length, ucmd->m_data);
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return true;
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}
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if (this->m_offset >= ucmd->m_offset &&
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this->m_offset + m_length <= ucmd->m_offset + ucmd->m_length) {
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this->m_offset = ucmd->m_offset;
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this->m_data = ucmd->m_data;
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this->m_length = ucmd->m_length;
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this->m_olddata = ucmd->m_olddata;
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this->m_nibbleindex = ucmd->m_nibbleindex;
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setText(tr("[HexReplace] pos: %1").arg(this->m_offset));
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return true;
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}
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}
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return false;
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}
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