protocols: add hyprland_focus_grab_v1 implementation (#5850)

* protocols: add hyprland_focus_grab_v1 implementation

* protocols/focus_grab: fix keyboard focus staying on unlisted windows

When creating a focus grab with layershell surfaces, the last active
toplevel kept keyboard focus.

* protocols/focus_grab: fix formatting

* protocols/focus_grab: try to pick surface for keyboard focus

* focus_grab: update keyboard focus to match spec

* Revert "protocols/focus_grab: try to pick surface for keyboard focus"

This reverts commit 090358d0d19cc65208641eaefa0a905e99145730.

* protocols/focus_grab: fix issues and match new spec

* kde-server-decoration: move to new impl

* protocols/focus_grab: review fixup

* Update hyprland-protocols

---------

Co-authored-by: Vaxry <vaxry@vaxry.net>

1 files changed, 77 insertions, 0 deletions

diff --git a/src/protocols/FocusGrab.hpp b/src/protocols/FocusGrab.hpp
new file mode 100644
index 00000000..11c26774
--- /dev/null
+++ b/src/protocols/FocusGrab.hpp
@@ -0,0 +1,77 @@
+#pragma once
+
+#include "WaylandProtocol.hpp"
+#include "hyprland-focus-grab-v1.hpp"
+#include "macros.hpp"
+#include <cstdint>
+#include <unordered_map>
+#include <vector>
+
+class CFocusGrab;
+
+class CFocusGrabSurfaceState {
+  public:
+    CFocusGrabSurfaceState(CFocusGrab* grab, wlr_surface* surface);
+    ~CFocusGrabSurfaceState();
+
+    enum State {
+        PendingAddition,
+        PendingRemoval,
+        Comitted,
+    } state = PendingAddition;
+
+  private:
+    DYNLISTENER(surfaceDestroy);
+};
+
+class CFocusGrab {
+  public:
+    CFocusGrab(SP<CHyprlandFocusGrabV1> resource_);
+    ~CFocusGrab();
+
+    bool good();
+    bool isSurfaceComitted(wlr_surface* surface);
+
+    void start();
+    void finish(bool sendCleared);
+
+  private:
+    void                                                         addSurface(wlr_surface* surface);
+    void                                                         removeSurface(wlr_surface* surface);
+    void                                                         eraseSurface(wlr_surface* surface);
+    void                                                         refocusKeyboard();
+    void                                                         commit();
+
+    SP<CHyprlandFocusGrabV1>                                     resource;
+    std::unordered_map<wlr_surface*, UP<CFocusGrabSurfaceState>> m_mSurfaces;
+    wlr_seat_pointer_grab                                        m_sPointerGrab;
+    wlr_seat_keyboard_grab                                       m_sKeyboardGrab;
+    wlr_seat_touch_grab                                          m_sTouchGrab;
+    bool                                                         m_bGrabActive = false;
+
+    DYNLISTENER(pointerGrabStarted);
+    DYNLISTENER(keyboardGrabStarted);
+    DYNLISTENER(touchGrabStarted);
+    friend class CFocusGrabSurfaceState;
+};
+
+class CFocusGrabProtocol : public IWaylandProtocol {
+  public:
+    CFocusGrabProtocol(const wl_interface* iface, const int& var, const std::string& name);
+
+    virtual void bindManager(wl_client* client, void* data, uint32_t ver, uint32_t id);
+
+  private:
+    void                                         onManagerResourceDestroy(wl_resource* res);
+    void                                         destroyGrab(CFocusGrab* grab);
+    void                                         onCreateGrab(CHyprlandFocusGrabManagerV1* pMgr, uint32_t id);
+
+    std::vector<UP<CHyprlandFocusGrabManagerV1>> m_vManagers;
+    std::vector<UP<CFocusGrab>>                  m_vGrabs;
+
+    friend class CFocusGrab;
+};
+
+namespace PROTO {
+    inline UP<CFocusGrabProtocol> focusGrab;
+}