pqPythonUndoCommand.h

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// SPDX-FileCopyrightText: Copyright (c) Kitware Inc.
// SPDX-FileCopyrightText: Copyright (c) Sandia Corporation
// SPDX-License-Identifier: BSD-3-Clause
#ifndef pqPythonUndoCommand_h
#define pqPythonUndoCommand_h
 
#include "pqPythonModule.h"
 
#include <QTextEdit>
#include <QUndoCommand>
 
#include <functional>
#include <iostream>
#include <stack>
#include <vector>
 
class pqPythonSyntaxHighlighter;
 
struct pqPythonTextHistoryEntry
{
  pqPythonTextHistoryEntry() = default;
 
  pqPythonTextHistoryEntry(const QString& txt, const std::int32_t cursorPos)
    : content(txt)
    , cursorPosition(cursorPos)
  {
  }
 
  QString content = "";
 
  std::int32_t cursorPosition = -1;
 
  bool isEmpty() const noexcept { return cursorPosition == -1; }
};
 
class PQPYTHON_EXPORT pqPythonUndoCommand : public QUndoCommand
{
public:
  pqPythonUndoCommand(QTextEdit& text, pqPythonSyntaxHighlighter* highlighter,
    pqPythonTextHistoryEntry& lastHistoryEntry,
    const pqPythonTextHistoryEntry&& currentHistoryEntry);
 
  void undo() override;
 
  void redo() override;
 
  const pqPythonTextHistoryEntry& getCurrentHistoryEntry() const
  {
    return this->CurrentHistoryEntry;
  }
 
private:
  void swapImpl(const pqPythonTextHistoryEntry& h);
 
  QTextEdit& Text;
 
  pqPythonSyntaxHighlighter* Highlighter;
 
  pqPythonTextHistoryEntry& TextLastHystoryEntry;
 
  const pqPythonTextHistoryEntry LastHistoryEntry;
 
  const pqPythonTextHistoryEntry CurrentHistoryEntry;
};
 
#endif // pqPythonUndoCommand_h