dwindle: add swapsplit dispatcher (#4702)

This is distinct from `swapwindow` in that it allows swapping the entire
tree node with its neighbour.

Fixes: https://github.com/hyprwm/Hyprland/issues/4701

1 files changed, 16 insertions, 0 deletions

diff --git a/src/layout/DwindleLayout.cpp b/src/layout/DwindleLayout.cpp
index 11be13ae..9db011d1 100644
--- a/src/layout/DwindleLayout.cpp
+++ b/src/layout/DwindleLayout.cpp
@@ -996,6 +996,8 @@ std::any CHyprDwindleLayout::layoutMessage(SLayoutMessageHeader header, std::str
     const auto ARGS = CVarList(message, 0, ' ');
     if (ARGS[0] == "togglesplit") {
         toggleSplit(header.pWindow);
+    } else if (ARGS[0] == "swapsplit") {
+        swapSplit(header.pWindow);
     } else if (ARGS[0] == "preselect") {
         std::string direction = ARGS[1];
 
@@ -1049,6 +1051,20 @@ void CHyprDwindleLayout::toggleSplit(CWindow* pWindow) {
     PNODE->pParent->recalcSizePosRecursive();
 }
 
+void CHyprDwindleLayout::swapSplit(CWindow* pWindow) {
+    const auto PNODE = getNodeFromWindow(pWindow);
+
+    if (!PNODE || !PNODE->pParent)
+        return;
+
+    if (pWindow->m_bIsFullscreen)
+        return;
+
+    std::swap(PNODE->pParent->children[0], PNODE->pParent->children[1]);
+
+    PNODE->pParent->recalcSizePosRecursive();
+}
+
 void CHyprDwindleLayout::replaceWindowDataWith(CWindow* from, CWindow* to) {
     const auto PNODE = getNodeFromWindow(from);