From d98f7ffaf5ce8fcfe901e4cdcb3dc0d1a5f48816 Mon Sep 17 00:00:00 2001
From: Vaxry <43317083+vaxerski@users.noreply.github.com>
Date: Mon, 2 Mar 2026 18:57:09 +0000
Subject: layout: store and preserve size and pos after fullscreen (#13500)

ref https://github.com/hyprwm/Hyprland/discussions/13401
---
 src/layout/algorithm/Algorithm.cpp                 |  7 +++++
 src/layout/algorithm/Algorithm.hpp                 |  2 ++
 src/layout/algorithm/FloatingAlgorithm.hpp         |  3 ++
 .../floating/default/DefaultFloatingAlgorithm.cpp  | 33 ++++++++++++++++++++++
 .../floating/default/DefaultFloatingAlgorithm.hpp  | 14 +++++++++
 5 files changed, 59 insertions(+)

(limited to 'src/layout/algorithm')

diff --git a/src/layout/algorithm/Algorithm.cpp b/src/layout/algorithm/Algorithm.cpp
index a5f7ffcc..cfb5b7e3 100644
--- a/src/layout/algorithm/Algorithm.cpp
+++ b/src/layout/algorithm/Algorithm.cpp
@@ -262,3 +262,10 @@ SP<ITarget> CAlgorithm::getNextCandidate(SP<ITarget> old) {
     // god damn it, maybe empty?
     return nullptr;
 }
+
+void CAlgorithm::setTargetGeom(const CBox& box, SP<ITarget> target) {
+    if (!target->floating() || !std::ranges::contains(m_floatingTargets, target))
+        return;
+
+    m_floating->setTargetGeom(box, target);
+}
diff --git a/src/layout/algorithm/Algorithm.hpp b/src/layout/algorithm/Algorithm.hpp
index 3ee26a3c..7df6c5c1 100644
--- a/src/layout/algorithm/Algorithm.hpp
+++ b/src/layout/algorithm/Algorithm.hpp
@@ -40,6 +40,8 @@ namespace Layout {
         void                             resizeTarget(const Vector2D& Δ, SP<ITarget> target, eRectCorner corner = CORNER_NONE);
         void                             moveTarget(const Vector2D& Δ, SP<ITarget> target);
 
+        void                             setTargetGeom(const CBox& box, SP<ITarget> target); // only for float
+
         void                             updateFloatingAlgo(UP<IFloatingAlgorithm>&& algo);
         void                             updateTiledAlgo(UP<ITiledAlgorithm>&& algo);
 
diff --git a/src/layout/algorithm/FloatingAlgorithm.hpp b/src/layout/algorithm/FloatingAlgorithm.hpp
index 2c9ff14b..40e53034 100644
--- a/src/layout/algorithm/FloatingAlgorithm.hpp
+++ b/src/layout/algorithm/FloatingAlgorithm.hpp
@@ -17,6 +17,9 @@ namespace Layout {
         // a target is being moved by a delta
         virtual void moveTarget(const Vector2D& Δ, SP<ITarget> target) = 0;
 
+        // a target is moved to a pos x size
+        virtual void setTargetGeom(const CBox& geom, SP<ITarget> target) = 0;
+
         virtual void recenter(SP<ITarget> t);
 
         virtual void recalculate();
diff --git a/src/layout/algorithm/floating/default/DefaultFloatingAlgorithm.cpp b/src/layout/algorithm/floating/default/DefaultFloatingAlgorithm.cpp
index 1fe3b068..0d069e4f 100644
--- a/src/layout/algorithm/floating/default/DefaultFloatingAlgorithm.cpp
+++ b/src/layout/algorithm/floating/default/DefaultFloatingAlgorithm.cpp
@@ -116,6 +116,8 @@ void CDefaultFloatingAlgorithm::newTarget(SP<ITarget> target) {
             PWINDOW->m_reportedSize        = PWINDOW->m_pendingReportedSize;
         }
     }
+
+    updateTarget(target);
 }
 
 void CDefaultFloatingAlgorithm::movedTarget(SP<ITarget> target, std::optional<Vector2D> focalPoint) {
@@ -152,6 +154,8 @@ void CDefaultFloatingAlgorithm::movedTarget(SP<ITarget> target, std::optional<Ve
         // put around the current center, fit in workArea
         target->setPositionGlobal(fitBoxInWorkArea(CBox{NEW_POS, LAST_SIZE}, target));
     }
+
+    updateTarget(target);
 }
 
 CBox CDefaultFloatingAlgorithm::fitBoxInWorkArea(const CBox& box, SP<ITarget> t) {
@@ -173,6 +177,7 @@ CBox CDefaultFloatingAlgorithm::fitBoxInWorkArea(const CBox& box, SP<ITarget> t)
 
 void CDefaultFloatingAlgorithm::removeTarget(SP<ITarget> target) {
     target->rememberFloatingSize(target->position().size());
+    m_datas.erase(target);
 }
 
 void CDefaultFloatingAlgorithm::resizeTarget(const Vector2D& Δ, SP<ITarget> target, eRectCorner corner) {
@@ -184,6 +189,8 @@ void CDefaultFloatingAlgorithm::resizeTarget(const Vector2D& Δ, SP<ITarget> tar
 
     if (g_layoutManager->dragController()->target() == target)
         target->warpPositionSize();
+
+    updateTarget(target);
 }
 
 void CDefaultFloatingAlgorithm::moveTarget(const Vector2D& Δ, SP<ITarget> target) {
@@ -193,12 +200,17 @@ void CDefaultFloatingAlgorithm::moveTarget(const Vector2D& Δ, SP<ITarget> targe
 
     if (g_layoutManager->dragController()->target() == target)
         target->warpPositionSize();
+
+    updateTarget(target);
 }
 
 void CDefaultFloatingAlgorithm::swapTargets(SP<ITarget> a, SP<ITarget> b) {
     auto posABackup = a->position();
     a->setPositionGlobal(b->position());
     b->setPositionGlobal(posABackup);
+
+    updateTarget(a);
+    updateTarget(b);
 }
 
 void CDefaultFloatingAlgorithm::moveTargetInDirection(SP<ITarget> t, Math::eDirection dir, bool silent) {
@@ -216,4 +228,25 @@ void CDefaultFloatingAlgorithm::moveTargetInDirection(SP<ITarget> t, Math::eDire
     }
 
     t->setPositionGlobal(pos);
+
+    updateTarget(t);
+}
+
+void CDefaultFloatingAlgorithm::recenter(SP<ITarget> t) {
+    if (!m_datas.contains(t)) {
+        IFloatingAlgorithm::recenter(t);
+        return;
+    }
+
+    t->setPositionGlobal(m_datas.at(t).lastBox);
+}
+
+void CDefaultFloatingAlgorithm::setTargetGeom(const CBox& geom, SP<ITarget> target) {
+    target->setPositionGlobal(geom);
+
+    updateTarget(target);
+}
+
+void CDefaultFloatingAlgorithm::updateTarget(SP<ITarget> t) {
+    m_datas[t] = {.lastBox = t->position()};
 }
diff --git a/src/layout/algorithm/floating/default/DefaultFloatingAlgorithm.hpp b/src/layout/algorithm/floating/default/DefaultFloatingAlgorithm.hpp
index ef94e371..1e87fac1 100644
--- a/src/layout/algorithm/floating/default/DefaultFloatingAlgorithm.hpp
+++ b/src/layout/algorithm/floating/default/DefaultFloatingAlgorithm.hpp
@@ -1,5 +1,7 @@
 #include "../../FloatingAlgorithm.hpp"
 
+#include <map>
+
 namespace Layout {
     class CAlgorithm;
 }
@@ -17,10 +19,22 @@ namespace Layout::Floating {
         virtual void resizeTarget(const Vector2D& Δ, SP<ITarget> target, eRectCorner corner = CORNER_NONE);
         virtual void moveTarget(const Vector2D& Δ, SP<ITarget> target);
 
+        virtual void setTargetGeom(const CBox& geom, SP<ITarget> target);
+
         virtual void swapTargets(SP<ITarget> a, SP<ITarget> b);
         virtual void moveTargetInDirection(SP<ITarget> t, Math::eDirection dir, bool silent);
 
+        virtual void recenter(SP<ITarget> t);
+
       private:
         CBox fitBoxInWorkArea(const CBox& box, SP<ITarget> t);
+
+        void updateTarget(SP<ITarget>);
+
+        struct SWindowData {
+            CBox lastBox;
+        };
+
+        std::map<WP<ITarget>, SWindowData> m_datas;
     };
 };
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