[plasma/kwin] src: utils: Drop unused SubSurfaceMonitor

Git commit 582f24f34944d68eddb6b9a1b4489961e6db4422 by Vlad Zahorodnii.
Committed on 27/07/2026 at 12:05.
Pushed by vladz into branch 'master'.

utils: Drop unused SubSurfaceMonitor

M  +0    -1    src/CMakeLists.txt
M  +0    -1    src/utils/CMakeLists.txt
D  +0    -85   src/utils/subsurfacemonitor.cpp
D  +0    -73   src/utils/subsurfacemonitor.h

https://invent.kde.org/plasma/kwin/-/commit/582f24f34944d68eddb6b9a1b4489961e6db4422

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index fd112413e57..0afa4080bee 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -605,7 +605,6 @@ install(FILES
     utils/resource.h
     utils/serial.h
     utils/softwarevsyncmonitor.h
-    utils/subsurfacemonitor.h
     utils/udev.h
     utils/version.h
     utils/vsyncmonitor.h
diff --git a/src/utils/CMakeLists.txt b/src/utils/CMakeLists.txt
index 30c0822e738..3868e05dbe2 100644
--- a/src/utils/CMakeLists.txt
+++ b/src/utils/CMakeLists.txt
@@ -11,7 +11,6 @@ target_sources(kwin PRIVATE
     ramfile.cpp
     realtime.cpp
     softwarevsyncmonitor.cpp
-    subsurfacemonitor.cpp
     udev.cpp
     vsyncmonitor.cpp
 )
diff --git a/src/utils/subsurfacemonitor.cpp b/src/utils/subsurfacemonitor.cpp
deleted file mode 100644
index 76d80f63aeb..00000000000
--- a/src/utils/subsurfacemonitor.cpp
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
-    KWin - the KDE window manager
-    This file is part of the KDE project.
-
-    SPDX-FileCopyrightText: 2020 Vlad Zahorodnii <[email protected]>
-
-    SPDX-License-Identifier: GPL-2.0-or-later
-*/
-
-#include "subsurfacemonitor.h"
-
-#include "wayland/subcompositor.h"
-#include "wayland/surface.h"
-
-namespace KWin
-{
-
-SubSurfaceMonitor::SubSurfaceMonitor(SurfaceInterface *surface, QObject *parent)
-    : QObject(parent)
-{
-    registerSurface(surface);
-}
-
-void SubSurfaceMonitor::registerSubSurface(SubSurfaceInterface *subSurface)
-{
-    SurfaceInterface *surface = subSurface->surface();
-
-    connect(subSurface, &SubSurfaceInterface::positionChanged,
-            this, &SubSurfaceMonitor::subSurfaceMoved);
-    connect(surface, &SurfaceInterface::sizeChanged,
-            this, &SubSurfaceMonitor::subSurfaceResized);
-    connect(surface, &SurfaceInterface::mapped,
-            this, &SubSurfaceMonitor::subSurfaceMapped);
-    connect(surface, &SurfaceInterface::unmapped,
-            this, &SubSurfaceMonitor::subSurfaceUnmapped);
-    connect(surface, &SurfaceInterface::committed,
-            this, [this, subSurface]() {
-        Q_EMIT subSurfaceCommitted(subSurface);
-    });
-
-    registerSurface(surface);
-}
-
-void SubSurfaceMonitor::unregisterSubSurface(SubSurfaceInterface *subSurface)
-{
-    SurfaceInterface *surface = subSurface->surface();
-    if (!surface) {
-        return;
-    }
-
-    disconnect(subSurface, nullptr, this, nullptr);
-
-    unregisterSurface(surface);
-}
-
-void SubSurfaceMonitor::registerSurface(SurfaceInterface *surface)
-{
-    connect(surface, &SurfaceInterface::childSubSurfaceAdded,
-            this, &SubSurfaceMonitor::subSurfaceAdded);
-    connect(surface, &SurfaceInterface::childSubSurfaceRemoved,
-            this, &SubSurfaceMonitor::subSurfaceRemoved);
-    connect(surface, &SurfaceInterface::childSubSurfaceAdded,
-            this, &SubSurfaceMonitor::registerSubSurface);
-    connect(surface, &SurfaceInterface::childSubSurfaceRemoved,
-            this, &SubSurfaceMonitor::unregisterSubSurface);
-
-    const QList<SubSurfaceInterface *> below = surface->below();
-    for (SubSurfaceInterface *childSubSurface : below) {
-        registerSubSurface(childSubSurface);
-    }
-
-    const QList<SubSurfaceInterface *> above = surface->above();
-    for (SubSurfaceInterface *childSubSurface : above) {
-        registerSubSurface(childSubSurface);
-    }
-}
-
-void SubSurfaceMonitor::unregisterSurface(SurfaceInterface *surface)
-{
-    disconnect(surface, nullptr, this, nullptr);
-}
-
-} // namespace KWin
-
-#include "moc_subsurfacemonitor.cpp"
diff --git a/src/utils/subsurfacemonitor.h b/src/utils/subsurfacemonitor.h
deleted file mode 100644
index 110294e676d..00000000000
--- a/src/utils/subsurfacemonitor.h
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
-    KWin - the KDE window manager
-    This file is part of the KDE project.
-
-    SPDX-FileCopyrightText: 2020 Vlad Zahorodnii <[email protected]>
-
-    SPDX-License-Identifier: GPL-2.0-or-later
-*/
-
-#pragma once
-
-#include <QObject>
-
-namespace KWin
-{
-
-class SurfaceInterface;
-class SubSurfaceInterface;
-
-}
-
-namespace KWin
-{
-
-/**
- * The SubSurfaceMonitor class provides a convenient way for monitoring changes in
- * sub-surface trees, e.g. addition or removal of sub-surfaces, etc.
- */
-class SubSurfaceMonitor : public QObject
-{
-    Q_OBJECT
-
-public:
-    /**
-     * Constructs a SubSurfaceTreeMonitor with the given @a surface and @a parent.
-     */
-    SubSurfaceMonitor(SurfaceInterface *surface, QObject *parent);
-
-Q_SIGNALS:
-    /**
-     * This signal is emitted when a new sub-surface has been added to the tree.
-     */
-    void subSurfaceAdded();
-    /**
-     * This signal is emitted when a sub-surface has been removed from the tree.
-     */
-    void subSurfaceRemoved();
-    /**
-     * This signal is emitted when a sub-surface has been moved relative to its parent.
-     */
-    void subSurfaceMoved();
-    /**
-     * This signal is emitted when a sub-surface has been resized.
-     */
-    void subSurfaceResized();
-    /**
-     * This signal is emitted when a sub-surface is mapped.
-     */
-    void subSurfaceMapped();
-    /**
-     * This signal is emitted when a sub-surface is unmapped.
-     */
-    void subSurfaceUnmapped();
-    void subSurfaceCommitted(SubSurfaceInterface *subSurface);
-
-private:
-    void registerSubSurface(SubSurfaceInterface *subSurface);
-    void unregisterSubSurface(SubSurfaceInterface *subSurface);
-    void registerSurface(SurfaceInterface *surface);
-    void unregisterSurface(SurfaceInterface *surface);
-};
-
-} // namespace KWin