undo_manager.h

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#ifndef YAZE_APP_EDITOR_CORE_UNDO_MANAGER_H_
#define YAZE_APP_EDITOR_CORE_UNDO_MANAGER_H_
 
#include <cstddef>
#include <deque>
#include <memory>
#include <string>
 
#include "absl/status/status.h"
#include "app/editor/core/undo_action.h"
 
namespace yaze {
namespace editor {
 
class UndoManager {
 public:
  UndoManager() = default;
  ~UndoManager() = default;
 
  // Non-copyable, movable
  UndoManager(const UndoManager&) = delete;
  UndoManager& operator=(const UndoManager&) = delete;
  UndoManager(UndoManager&&) = default;
  UndoManager& operator=(UndoManager&&) = default;
 
  void Push(std::unique_ptr<UndoAction> action);
 
  absl::Status Undo();
 
  absl::Status Redo();
 
  bool CanUndo() const { return !undo_stack_.empty(); }
  bool CanRedo() const { return !redo_stack_.empty(); }
 
  std::string GetUndoDescription() const;
 
  std::string GetRedoDescription() const;
 
  void SetMaxStackSize(size_t max) { max_stack_size_ = max; }
  size_t GetMaxStackSize() const { return max_stack_size_; }
 
  size_t UndoStackSize() const { return undo_stack_.size(); }
  size_t RedoStackSize() const { return redo_stack_.size(); }
 
  void Clear();
 
 private:
  void EnforceStackLimit();
 
  std::deque<std::unique_ptr<UndoAction>> undo_stack_;
  std::deque<std::unique_ptr<UndoAction>> redo_stack_;
  size_t max_stack_size_ = 50;
};
 
}  // namespace editor
}  // namespace yaze
 
#endif  // YAZE_APP_EDITOR_CORE_UNDO_MANAGER_H_