Hyprland/src/helpers/SubsurfaceTree.hpp

#pragma once

#include "../defines.hpp"
#include <list>
#include "WLSurface.hpp"

struct SSubsurface;
class CWindow;

typedef void (*applyGlobalOffsetFn)(void*, int*, int*);

struct SSurfaceTreeNode {
    CWLSurface* pSurface = nullptr; // actual surface
    CWLSurface  pInternalSurface;   // not present for head nodes to not dupe wlr_surface ownership

    DYNLISTENER(newSubsurface);
    DYNLISTENER(commit);
    DYNLISTENER(destroy);

    SSurfaceTreeNode*      pParent     = nullptr;
    SSubsurface*           pSubsurface = nullptr;

    std::list<SSubsurface> childSubsurfaces;

    applyGlobalOffsetFn    offsetfn;
    void*                  globalOffsetData;
    CWindow*               pWindowOwner = nullptr;

    bool                   operator==(const SSurfaceTreeNode& rhs) const {
        return pSurface == rhs.pSurface;
    }
};

struct SSubsurface {
    wlr_subsurface*   pSubsurface = nullptr;

    SSurfaceTreeNode* pParent = nullptr;
    SSurfaceTreeNode* pChild  = nullptr;

    DYNLISTENER(map);
    DYNLISTENER(unmap);
    DYNLISTENER(destroy);

    CWindow* pWindowOwner = nullptr;

    bool     operator==(const SSubsurface& rhs) const {
        return pSubsurface == rhs.pSubsurface;
    }
};

namespace SubsurfaceTree {
    SSurfaceTreeNode*                  createTreeRoot(wlr_surface*, applyGlobalOffsetFn, void*, CWindow* pWindow = nullptr);
    void                               destroySurfaceTree(SSurfaceTreeNode*);

    inline std::list<SSurfaceTreeNode> surfaceTreeNodes;
};