EditorHistory.h

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#pragma once
 
#include "editor/TileBuffer.h"
 
#include <string>
#include <vector>
 
namespace eve::editor {
 
class EditorHistory {
public:
    void clear();
 
    void push(const std::string &name, const std::string &payload);
 
    void beginGroup(const std::string &name);
    void recordTile(int x, int y, int oldGid, int newGid);
    void endGroup();
    bool isGrouping() const { return grouping_; }
 
    bool canUndo() const;
    bool canRedo() const;
    int getUndoCount() const;
    int getRedoCount() const;
 
    bool undo();
    bool redo();
 
    bool applyLastToBuffer(TileBuffer *buffer);
 
    std::string getLastActionName() const;
    std::string getLastActionKind() const;  // "opaque" | "tiles"
    std::string getLastPayload() const;
    int getLastTileCount() const;
    int getLastTileX(int index) const;
    int getLastTileY(int index) const;
    int getLastTileOldGid(int index) const;
    int getLastTileNewGid(int index) const;
 
private:
    struct TileChange {
        int x = 0, y = 0, oldGid = 0, newGid = 0;
    };
    struct Action {
        std::string kind;  // opaque | tiles
        std::string name;
        std::string payload;
        std::vector<TileChange> tiles;
    };
 
    void trimRedo();
    bool validLastTile(int index) const;
 
    std::vector<Action> undoStack_;
    std::vector<Action> redoStack_;
    Action pending_;
    bool grouping_ = false;
    Action lastApplied_;
    bool hasLast_ = false;
    bool lastWasUndo_ = false;
};
 
}  // namespace eve::editor