decos: groupbar mouse interaction (#3102)

* allow groupbar clicking
	modified:   src/Window.cpp
	modified:   src/Window.hpp
	modified:   src/managers/input/InputManager.cpp
	modified:   src/render/decorations/CHyprGroupBarDecoration.cpp
	modified:   src/render/decorations/CHyprGroupBarDecoration.hpp

* remove setting pos inside insertWindowToGroup()

modified:   src/Window.cpp
modified:   src/layout/DwindleLayout.cpp
modified:   src/layout/MasterLayout.cpp
modified:   src/managers/KeybindManager.cpp

* add group window by index and group size functions
modified:   src/Window.cpp
modified:   src/Window.hpp
modified:   src/managers/input/InputManager.cpp

* allow dragging into groupbar
modified:   src/Window.cpp
modified:   src/layout/DwindleLayout.cpp
modified:   src/layout/MasterLayout.cpp

* allow dragging from groupbar
modified:   src/managers/KeybindManager.cpp

* try groupbar clicking before border resize
modified:   src/managers/input/InputManager.cpp

* block grabbing groupbar on floating (crash)

remove later when crashing is fixed

modified:   src/managers/KeybindManager.cpp

* remove redundant { }
modified:   src/layout/DwindleLayout.cpp
modified:   src/layout/MasterLayout.cpp

* implement getWindowDecorationBox()
modified:   src/Window.cpp
modified:   src/Window.hpp
modified:   src/layout/DwindleLayout.cpp
modified:   src/layout/MasterLayout.cpp
modified:   src/managers/KeybindManager.cpp
modified:   src/managers/input/InputManager.cpp
modified:   src/render/decorations/CHyprDropShadowDecoration.cpp
modified:   src/render/decorations/CHyprGroupBarDecoration.cpp
modified:   src/render/decorations/IHyprWindowDecoration.cpp
modified:   src/render/decorations/IHyprWindowDecoration.hpp

* fix crash when moveoutofgroup in floating windows

also removes dragging from floating windows limitation

modified:   src/layout/IHyprLayout.cpp
modified:   src/managers/KeybindManager.cpp

* use CRegion in getWindowDecorationBox()
modified:   src/helpers/Region.cpp
modified:   src/helpers/Region.hpp
modified:   src/layout/DwindleLayout.cpp
modified:   src/layout/MasterLayout.cpp
modified:   src/managers/KeybindManager.cpp
modified:   src/managers/input/InputManager.cpp
modified:   src/render/decorations/IHyprWindowDecoration.cpp
modified:   src/render/decorations/IHyprWindowDecoration.hpp

* add groupbar scrolling
modified:   src/config/ConfigManager.cpp
modified:   src/managers/input/InputManager.cpp

* change name to getWindowDecorationRegion()
modified:   src/layout/DwindleLayout.cpp
modified:   src/layout/MasterLayout.cpp
modified:   src/managers/KeybindManager.cpp
modified:   src/managers/input/InputManager.cpp
modified:   src/render/decorations/IHyprWindowDecoration.cpp
modified:   src/render/decorations/IHyprWindowDecoration.hpp

* make dragging from group less hacky for floating
modified:   src/managers/KeybindManager.cpp

src/Window.cpp

@@ -653,6 +653,27 @@ CWindow* CWindow::getGroupCurrent() {
     return curr;
 }
 
+int CWindow::getGroupSize() {
+    int      size = 1;
+    CWindow* curr = this;
+    while (curr->m_sGroupData.pNextWindow != this) {
+        curr = curr->m_sGroupData.pNextWindow;
+        size++;
+    }
+    return size;
+}
+
+CWindow* CWindow::getGroupWindowByIndex(int index) {
+    const int SIZE = getGroupSize();
+    index          = ((index % SIZE) + SIZE) % SIZE;
+    CWindow* curr  = getGroupHead();
+    while (index > 0) {
+        curr = curr->m_sGroupData.pNextWindow;
+        index--;
+    }
+    return curr;
+}
+
 void CWindow::setGroupCurrent(CWindow* pWindow) {
     CWindow* curr     = this->m_sGroupData.pNextWindow;
     bool     isMember = false;
@@ -701,10 +722,8 @@ void CWindow::setGroupCurrent(CWindow* pWindow) {
 }
 
 void CWindow::insertWindowToGroup(CWindow* pWindow) {
-    static const auto* USECURRPOS = &g_pConfigManager->getConfigValuePtr("misc:group_insert_after_current")->intValue;
-
-    const auto         BEGINAT = *USECURRPOS ? this : getGroupTail();
-    const auto         ENDAT   = *USECURRPOS ? m_sGroupData.pNextWindow : getGroupHead();
+    const auto BEGINAT = this;
+    const auto ENDAT   = m_sGroupData.pNextWindow;
 
     if (!pWindow->m_sGroupData.pNextWindow) {
         BEGINAT->m_sGroupData.pNextWindow = pWindow;