fix monitor cleanups on removed

src/Compositor.cpp

@@ -937,3 +937,20 @@ void CCompositor::updateWindowBorderColor(CWindow* pWindow) {
     else
         pWindow->m_cRealBorderColor = CColor(pWindow == m_pLastWindow ? *ACTIVECOL : *INACTIVECOL);
 }
+
+void CCompositor::moveWindowToWorkspace(CWindow* pWindow, const std::string& work) {
+    m_pLastWindow = pWindow;
+    g_pKeybindManager->moveActiveToWorkspace(work);
+
+    g_pInputManager->refocus();
+}
+
+int CCompositor::getNextAvailableMonitorID() {
+    int64_t topID = -1;
+    for (auto& m : m_lMonitors) {
+        if ((int64_t)m.ID > topID)
+            topID = m.ID;
+    }
+
+    return topID + 1;
+}

src/Compositor.hpp

@@ -126,6 +126,8 @@ public:
     SMonitor*               getMonitorInDirection(const char&);
     void                    updateAllWindowsBorders();
     void                    updateWindowBorderColor(CWindow*);
+    void                    moveWindowToWorkspace(CWindow*, const std::string&);
+    int                     getNextAvailableMonitorID();
 
 private:
     void                    initAllSignals();

src/events/Layers.cpp

@@ -58,7 +58,12 @@ void Events::listener_destroyLayerSurface(void* owner, void* data) {
 
     Debug::log(LOG, "LayerSurface %x destroyed", layersurface->layerSurface);
 
-    if (!layersurface->fadingOut) {
+    const auto PMONITOR = g_pCompositor->getMonitorFromID(layersurface->monitorID);
+
+    if (!g_pCompositor->getMonitorFromID(layersurface->monitorID))
+        Debug::log(WARN, "Layersurface destroyed on an invalid monitor (removed?)");
+
+    if (!layersurface->fadingOut && PMONITOR) {
         Debug::log(LOG, "Removing LayerSurface that wasn't mapped.");
         layersurface->alpha.setValueAndWarp(0.f);
         layersurface->fadingOut = true;
@@ -70,8 +75,6 @@ void Events::listener_destroyLayerSurface(void* owner, void* data) {
     layersurface->hyprListener_unmapLayerSurface.removeCallback();
     layersurface->hyprListener_newPopup.removeCallback();
 
-    const auto PMONITOR = g_pCompositor->getMonitorFromID(layersurface->monitorID);
-
     // rearrange to fix the reserved areas
     if (PMONITOR) {
         g_pHyprRenderer->arrangeLayersForMonitor(PMONITOR->ID);
@@ -131,6 +134,11 @@ void Events::listener_unmapLayerSurface(void* owner, void* data) {
 
     Debug::log(LOG, "LayerSurface %x unmapped", layersurface->layerSurface);
 
+    if (!g_pCompositor->getMonitorFromID(layersurface->monitorID)) {
+        Debug::log(WARN, "Layersurface unmapping on invalid monitor (removed?) ignoring.");
+        return;
+    }
+
     // make a snapshot and start fade
     g_pHyprOpenGL->makeLayerSnapshot(layersurface);
     layersurface->alpha = 0.f;

src/events/Monitors.cpp

@@ -70,7 +70,7 @@ void Events::listener_newOutput(wl_listener* listener, void* data) {
 
     SMonitor newMonitor;
     newMonitor.output = OUTPUT;
-    newMonitor.ID = g_pCompositor->m_lMonitors.size();
+    newMonitor.ID = g_pCompositor->getNextAvailableMonitorID();
     newMonitor.szName = OUTPUT->name;
 
     wlr_output_init_render(OUTPUT, g_pCompositor->m_sWLRAllocator, g_pCompositor->m_sWLRRenderer);
@@ -296,7 +296,44 @@ void Events::listener_monitorDestroy(void* owner, void* data) {
     if (!pMonitor)
         return;
 
+    // Cleanup everything. Move windows back, snap cursor, shit.
+    const auto BACKUPMON = &g_pCompositor->m_lMonitors.front();
+    const auto BACKUPWORKSPACE = BACKUPMON->activeWorkspace > 0 ? std::to_string(BACKUPMON->activeWorkspace) : "name:" + g_pCompositor->getWorkspaceByID(BACKUPMON->activeWorkspace)->m_szName;
+
+    if (!BACKUPMON) {
+        Debug::log(CRIT, "No monitors! Unplugged last! Exiting.");
+        g_pCompositor->cleanupExit();
+        return;
+    }
+
+    // snap cursor
+    wlr_cursor_warp(g_pCompositor->m_sWLRCursor, g_pCompositor->m_sSeat.mouse->mouse, BACKUPMON->vecPosition.x + BACKUPMON->vecTransformedSize.x / 2.f, BACKUPMON->vecPosition.y + BACKUPMON->vecTransformedSize.y / 2.f);
+
+    // move windows
+    for (auto& w : g_pCompositor->m_lWindows) {
+        if (w.m_iMonitorID == pMonitor->ID) {
+            g_pCompositor->moveWindowToWorkspace(&w, BACKUPWORKSPACE);
+        }
+    }
+
+    g_pCompositor->sanityCheckWorkspaces();
+
+    Debug::log(LOG, "Removed monitor %s!", pMonitor->szName.c_str());
+
     g_pCompositor->m_lMonitors.remove(*pMonitor);
 
-    // TODO: cleanup windows
+    // update the pMostHzMonitor
+    if (pMostHzMonitor == pMonitor) {
+        int mostHz = 0;
+        SMonitor* pMonitorMostHz = nullptr;
+
+        for (auto& m : g_pCompositor->m_lMonitors) {
+            if (m.refreshRate > mostHz) {
+                pMonitorMostHz = &m;
+                mostHz = m.refreshRate;
+            }
+        }
+
+        pMostHzMonitor = pMonitorMostHz;
+    }
 }

src/managers/KeybindManager.hpp

@@ -51,6 +51,8 @@ private:
     static void         moveCursorToCorner(std::string);
     static void         workspaceOpt(std::string);
     static void         exitHyprland(std::string);
+
+    friend class CCompositor;
 };
 
 inline std::unique_ptr<CKeybindManager> g_pKeybindManager;