dwindle: add the ability to specify an aspect ratio for a singular window (#10650)

1 files changed, 30 insertions, 6 deletions

diff --git a/src/layout/DwindleLayout.cpp b/src/layout/DwindleLayout.cpp
index 305f1fee..2f51b162 100644
--- a/src/layout/DwindleLayout.cpp
+++ b/src/layout/DwindleLayout.cpp
@@ -152,15 +152,39 @@ void CHyprDwindleLayout::applyNodeDataToWindow(SDwindleNodeData* pNode, bool for
 
     PWINDOW->updateWindowDecos();
 
-    auto       calcPos  = PWINDOW->m_position;
-    auto       calcSize = PWINDOW->m_size;
+    auto              calcPos  = PWINDOW->m_position;
+    auto              calcSize = PWINDOW->m_size;
 
-    const auto OFFSETTOPLEFT = Vector2D((double)(DISPLAYLEFT ? gapsOut.m_left : gapsIn.m_left), (double)(DISPLAYTOP ? gapsOut.m_top : gapsIn.m_top));
+    const static auto REQUESTEDRATIO          = *CConfigValue<Hyprlang::VEC2>("dwindle:single_window_aspect_ratio");
+    const static auto REQUESTEDRATIOTOLERANCE = CConfigValue<Hyprlang::FLOAT>("dwindle:single_window_aspect_ratio_tolerance");
 
-    const auto OFFSETBOTTOMRIGHT = Vector2D((double)(DISPLAYRIGHT ? gapsOut.m_right : gapsIn.m_right), (double)(DISPLAYBOTTOM ? gapsOut.m_bottom : gapsIn.m_bottom));
+    Vector2D          ratioPadding;
 
-    calcPos  = calcPos + OFFSETTOPLEFT;
-    calcSize = calcSize - OFFSETTOPLEFT - OFFSETBOTTOMRIGHT;
+    if (REQUESTEDRATIO.y != 0 && !pNode->pParent) {
+        const Vector2D originalSize = PMONITOR->m_size - PMONITOR->m_reservedTopLeft - PMONITOR->m_reservedBottomRight;
+
+        const double   requestedRatio = REQUESTEDRATIO.x / REQUESTEDRATIO.y;
+        const double   originalRatio  = originalSize.x / originalSize.y;
+
+        if (requestedRatio > originalRatio) {
+            double padding = originalSize.y - (originalSize.x / requestedRatio);
+
+            if (padding / 2 > (*REQUESTEDRATIOTOLERANCE) * originalSize.y)
+                ratioPadding = Vector2D{0., padding};
+        } else if (requestedRatio < originalRatio) {
+            double padding = originalSize.x - (originalSize.y * requestedRatio);
+
+            if (padding / 2 > (*REQUESTEDRATIOTOLERANCE) * originalSize.x)
+                ratioPadding = Vector2D{padding, 0.};
+        }
+    }
+
+    const auto GAPOFFSETTOPLEFT = Vector2D((double)(DISPLAYLEFT ? gapsOut.m_left : gapsIn.m_left), (double)(DISPLAYTOP ? gapsOut.m_top : gapsIn.m_top));
+
+    const auto GAPOFFSETBOTTOMRIGHT = Vector2D((double)(DISPLAYRIGHT ? gapsOut.m_right : gapsIn.m_right), (double)(DISPLAYBOTTOM ? gapsOut.m_bottom : gapsIn.m_bottom));
+
+    calcPos  = calcPos + GAPOFFSETTOPLEFT + ratioPadding / 2;
+    calcSize = calcSize - GAPOFFSETTOPLEFT - GAPOFFSETBOTTOMRIGHT - ratioPadding;
 
     if (PWINDOW->m_isPseudotiled) {
         // Calculate pseudo