message_undo_actions.h

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#ifndef YAZE_APP_EDITOR_MESSAGE_UNDO_ACTIONS_H_
#define YAZE_APP_EDITOR_MESSAGE_UNDO_ACTIONS_H_
 
#include <cstddef>
#include <functional>
#include <string>
#include <utility>
 
#include "absl/status/status.h"
#include "absl/strings/str_format.h"
#include "app/editor/core/undo_action.h"
#include "app/editor/message/message_data.h"
 
namespace yaze {
namespace editor {
 
struct MessageSnapshot {
  MessageData message;
  std::string parsed_text;
  int message_index;
  bool is_expanded;
};
 
class MessageEditAction : public UndoAction {
 public:
  using ApplyFn = std::function<void(const MessageSnapshot&)>;
 
  MessageEditAction(MessageSnapshot before, MessageSnapshot after,
                    ApplyFn apply_fn)
      : before_(std::move(before)),
        after_(std::move(after)),
        apply_fn_(std::move(apply_fn)) {}
 
  absl::Status Undo() override {
    apply_fn_(before_);
    return absl::OkStatus();
  }
 
  absl::Status Redo() override {
    apply_fn_(after_);
    return absl::OkStatus();
  }
 
  std::string Description() const override {
    return absl::StrFormat("Edit message %d", before_.message_index);
  }
 
  size_t MemoryUsage() const override {
    return before_.message.Data.size() + after_.message.Data.size() +
           before_.parsed_text.size() + after_.parsed_text.size();
  }
 
 private:
  MessageSnapshot before_;
  MessageSnapshot after_;
  ApplyFn apply_fn_;
};
 
}  // namespace editor
}  // namespace yaze
 
#endif  // YAZE_APP_EDITOR_MESSAGE_UNDO_ACTIONS_H_