MRSwapRootAction.h

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#pragma once
#include "MRMesh/MRHistoryAction.h"
#include "MRMesh/MRObject.h"
#include "MRMesh/MRSceneRoot.h"
#include "MRMesh/MRHeapBytes.h"
#include "MRViewer.h"
#include <memory>
 
namespace MR
{
 
class SwapRootAction : public HistoryAction
{
public:
    // Constructed from original root
    SwapRootAction( const std::string& name ) :
        root_{ SceneRoot::getSharedPtr() },
        scenePath_{ SceneRoot::getScenePath() },
        name_{ name }
    {
    }
 
    virtual std::string name() const override
    {
        return name_;
    }
 
    virtual void action( HistoryAction::Type ) override
    {
        if ( !root_ )
            return;
        std::swap( root_, SceneRoot::getSharedPtr() );
        getViewerInstance().setSceneDirty();
        auto scenePathClone = SceneRoot::getScenePath();
        SceneRoot::setScenePath( scenePath_ );
        scenePath_ = scenePathClone;
 
        getViewerInstance().makeTitleFromSceneRootPath();
    }
 
    [[nodiscard]] virtual size_t heapBytes() const override
    {
        return scenePath_.native().capacity() * sizeof( scenePath_.native()[0] )
            + name_.capacity()
            + MR::heapBytes( root_ );
    }
 
private:
    std::shared_ptr<SceneRootObject> root_;
    std::filesystem::path scenePath_;
    std::string name_;
};
 
}