group: fix dragging into floating groups (#3719)

* allow dragging into floating groups

modified:   src/Compositor.cpp
modified:   src/Compositor.hpp
modified:   src/layout/IHyprLayout.cpp
modified:   src/render/decorations/CHyprGroupBarDecoration.cpp

* floating-only
modified:   src/layout/IHyprLayout.cpp

1 files changed, 28 insertions, 1 deletions

diff --git a/src/layout/IHyprLayout.cpp b/src/layout/IHyprLayout.cpp
index 8bb51daf..acd84684 100644
--- a/src/layout/IHyprLayout.cpp
+++ b/src/layout/IHyprLayout.cpp
@@ -1,6 +1,7 @@
 #include "IHyprLayout.hpp"
 #include "../defines.hpp"
 #include "../Compositor.hpp"
+#include "../render/decorations/CHyprGroupBarDecoration.hpp"
 
 void IHyprLayout::onWindowCreated(CWindow* pWindow, eDirection direction) {
     if (pWindow->m_bIsFloating) {
@@ -264,10 +265,36 @@ void IHyprLayout::onEndDragWindow() {
         g_pInputManager->refocus();
         changeWindowFloatingMode(DRAGGINGWINDOW);
         DRAGGINGWINDOW->m_vLastFloatingSize = m_vDraggingWindowOriginalFloatSize;
+    } else if (g_pInputManager->dragMode == MBIND_MOVE) {
+        g_pHyprRenderer->damageWindow(DRAGGINGWINDOW);
+        const auto MOUSECOORDS = g_pInputManager->getMouseCoordsInternal();
+        CWindow*   pWindow     = g_pCompositor->vectorToWindowIdeal(MOUSECOORDS, DRAGGINGWINDOW);
+
+        if (pWindow && pWindow->m_bIsFloating) {
+            for (auto& wd : pWindow->m_dWindowDecorations) {
+                if (!(wd->getDecorationFlags() & DECORATION_ALLOWS_MOUSE_INPUT))
+                    continue;
+
+                if (g_pDecorationPositioner->getWindowDecorationBox(wd.get()).containsPoint(MOUSECOORDS)) {
+                    if (!wd->onEndWindowDragOnDeco(DRAGGINGWINDOW, MOUSECOORDS))
+                        return;
+                    break;
+                }
+            }
+
+            if (pWindow->m_sGroupData.pNextWindow && DRAGGINGWINDOW->canBeGroupedInto(pWindow)) {
+                static const auto* USECURRPOS = &g_pConfigManager->getConfigValuePtr("group:insert_after_current")->intValue;
+                (*USECURRPOS ? pWindow : pWindow->getGroupTail())->insertWindowToGroup(DRAGGINGWINDOW);
+                pWindow->setGroupCurrent(DRAGGINGWINDOW);
+                DRAGGINGWINDOW->updateWindowDecos();
+
+                if (!DRAGGINGWINDOW->getDecorationByType(DECORATION_GROUPBAR))
+                    DRAGGINGWINDOW->addWindowDeco(std::make_unique<CHyprGroupBarDecoration>(DRAGGINGWINDOW));
+            }
+        }
     }
 
     g_pHyprRenderer->damageWindow(DRAGGINGWINDOW);
-
     g_pCompositor->focusWindow(DRAGGINGWINDOW);
 
     g_pInputManager->m_bWasDraggingWindow = false;