From 781828a56e495439bfe9c0a701cb29f5e4e2df24 Mon Sep 17 00:00:00 2001
From: Vaxry <vaxry@vaxry.net>
Date: Wed, 16 Oct 2024 21:59:29 +0100
Subject: [PATCH] output: send enter events on late wl_output binds

fixes #6560
---
 src/protocols/core/Compositor.cpp |  6 ++++++
 src/protocols/core/Compositor.hpp |  2 ++
 src/protocols/core/Output.cpp     | 21 +++++++++++++++++++++
 3 files changed, 29 insertions(+)

diff --git a/src/protocols/core/Compositor.cpp b/src/protocols/core/Compositor.cpp
index 37a4bdf1..3d4b63c1 100644
--- a/src/protocols/core/Compositor.cpp
+++ b/src/protocols/core/Compositor.cpp
@@ -589,3 +589,9 @@ void CWLCompositorProtocol::destroyResource(CWLSurfaceResource* resource) {
 void CWLCompositorProtocol::destroyResource(CWLRegionResource* resource) {
     std::erase_if(m_vRegions, [&](const auto& other) { return other.get() == resource; });
 }
+
+void CWLCompositorProtocol::forEachSurface(std::function<void(SP<CWLSurfaceResource>)> fn) {
+    for (auto& surf : m_vSurfaces) {
+        fn(surf);
+    }
+}
diff --git a/src/protocols/core/Compositor.hpp b/src/protocols/core/Compositor.hpp
index dc1c851f..b3c067c9 100644
--- a/src/protocols/core/Compositor.hpp
+++ b/src/protocols/core/Compositor.hpp
@@ -169,6 +169,8 @@ class CWLCompositorProtocol : public IWaylandProtocol {
 
     virtual void bindManager(wl_client* client, void* data, uint32_t ver, uint32_t id);
 
+    void         forEachSurface(std::function<void(SP<CWLSurfaceResource>)> fn);
+
     struct {
         CSignal newSurface; // SP<CWLSurfaceResource>
     } events;
diff --git a/src/protocols/core/Output.cpp b/src/protocols/core/Output.cpp
index 3e68937f..e9f35abc 100644
--- a/src/protocols/core/Output.cpp
+++ b/src/protocols/core/Output.cpp
@@ -1,4 +1,6 @@
 #include "Output.hpp"
+#include "Compositor.hpp"
+#include "../../Compositor.hpp"
 #include "../../helpers/Monitor.hpp"
 
 CWLOutputResource::CWLOutputResource(SP<CWlOutput> resource_, SP<CMonitor> pMonitor) : monitor(pMonitor), resource(resource_) {
@@ -27,6 +29,25 @@ CWLOutputResource::CWLOutputResource(SP<CWlOutput> resource_, SP<CMonitor> pMoni
     }
 
     updateState();
+
+    PROTO::compositor->forEachSurface([](SP<CWLSurfaceResource> surf) {
+        auto HLSurf = CWLSurface::fromResource(surf);
+
+        if (!HLSurf)
+            return;
+
+        const auto GEOMETRY = HLSurf->getSurfaceBoxGlobal();
+
+        if (!GEOMETRY.has_value())
+            return;
+
+        for (auto& m : g_pCompositor->m_vMonitors) {
+            if (!m->logicalBox().overlaps(*GEOMETRY))
+                continue;
+
+            surf->enter(m);
+        }
+    });
 }
 
 SP<CWLOutputResource> CWLOutputResource::fromResource(wl_resource* res) {