layersurface: fixup focus issues in onUnmap

fixes #6929

src/desktop/LayerSurface.cpp

@@ -212,8 +212,11 @@ void CLayerSurface::onUnmap() {
         return;
 
     // refocus if needed
-    if (WASLASTFOCUS)
+    //                                vvvvvvvvvvvvv if there is a last focus and the last focus is not keyboard focusable, fallback to window
+    if (WASLASTFOCUS || (g_pCompositor->m_pLastFocus && !g_pCompositor->m_pLastFocus->hlSurface->keyboardFocusable()))
         g_pInputManager->refocusLastWindow(PMONITOR);
+    else if (g_pCompositor->m_pLastFocus)
+        g_pSeatManager->setKeyboardFocus(g_pCompositor->m_pLastFocus.lock());
 
     CBox geomFixed = {geometry.x + PMONITOR->vecPosition.x, geometry.y + PMONITOR->vecPosition.y, geometry.width, geometry.height};
     g_pHyprRenderer->damageBox(&geomFixed);

src/desktop/WLSurface.cpp

@@ -1,6 +1,7 @@
 #include "WLSurface.hpp"
 #include "../Compositor.hpp"
 #include "../protocols/core/Compositor.hpp"
+#include "../protocols/LayerShell.hpp"
 
 void CWLSurface::assign(SP<CWLSurfaceResource> pSurface) {
     m_pResource = pSurface;
@@ -222,3 +223,11 @@ SP<CWLSurface> CWLSurface::fromResource(SP<CWLSurfaceResource> pSurface) {
         return nullptr;
     return pSurface->hlSurface.lock();
 }
+
+bool CWLSurface::keyboardFocusable() const {
+    if (m_pWindowOwner || m_pPopupOwner || m_pSubsurfaceOwner)
+        return true;
+    if (m_pLayerOwner)
+        return m_pLayerOwner->layerSurface->current.interactivity != ZWLR_LAYER_SURFACE_V1_KEYBOARD_INTERACTIVITY_NONE;
+    return false;
+}

src/desktop/WLSurface.hpp

@@ -39,6 +39,7 @@ class CWLSurface {
     Vector2D               getViewporterCorrectedSize() const;
     CRegion                computeDamage() const; // logical coordinates. May be wrong if the surface is unassigned
     bool                   visible();
+    bool                   keyboardFocusable() const;
 
     // getters for owners.
     PHLWINDOW    getWindow() const;