decorations: recalc layout and positioner on add/remove

src/Window.cpp

@@ -202,12 +202,16 @@ void CWindow::updateWindowDecos() {
 
 void CWindow::addWindowDeco(std::unique_ptr<IHyprWindowDecoration> deco) {
     m_dWindowDecorations.emplace_back(std::move(deco));
+    g_pDecorationPositioner->forceRecalcFor(this);
     updateWindowDecos();
+    g_pLayoutManager->getCurrentLayout()->recalculateWindow(this);
 }
 
 void CWindow::removeWindowDeco(IHyprWindowDecoration* deco) {
     m_vDecosToRemove.push_back(deco);
+    g_pDecorationPositioner->forceRecalcFor(this);
     updateWindowDecos();
+    g_pLayoutManager->getCurrentLayout()->recalculateWindow(this);
 }
 
 pid_t CWindow::getPID() {

src/render/decorations/DecorationPositioner.cpp

@@ -95,6 +95,16 @@ void CDecorationPositioner::sanitizeDatas() {
     });
 }
 
+void CDecorationPositioner::forceRecalcFor(CWindow* pWindow) {
+    const auto WIT = std::find_if(m_mWindowDatas.begin(), m_mWindowDatas.end(), [&](const auto& other) { return other.first == pWindow; });
+    if (WIT == m_mWindowDatas.end())
+        return;
+
+    const auto WINDOWDATA = &WIT->second;
+
+    WINDOWDATA->needsRecalc = true;
+}
+
 void CDecorationPositioner::onWindowUpdate(CWindow* pWindow) {
     if (!g_pCompositor->windowExists(pWindow) || !pWindow->m_bIsMapped)
         return;

src/render/decorations/DecorationPositioner.hpp

@@ -71,6 +71,7 @@ class CDecorationPositioner {
     CBox                     getBoxWithIncludedDecos(CWindow* pWindow);
     void                     repositionDeco(IHyprWindowDecoration* deco);
     CBox                     getWindowDecorationBox(IHyprWindowDecoration* deco);
+    void                     forceRecalcFor(CWindow* pWindow);
 
   private:
     struct SWindowPositioningData {