wm: add WindowManager module with ext-workspace support

src/wayland/CMakeLists.txt

@@ -123,6 +123,8 @@ list(APPEND WAYLAND_MODULES Quickshell.Wayland._IdleNotify)
 add_subdirectory(shortcuts_inhibit)
 list(APPEND WAYLAND_MODULES Quickshell.Wayland._ShortcutsInhibitor)
 
+add_subdirectory(windowmanager)
+
 # widgets for qmenu
 target_link_libraries(quickshell-wayland PRIVATE
 	Qt::Quick Qt::Widgets Qt::WaylandClient Qt::WaylandClientPrivate

src/wayland/windowmanager/CMakeLists.txt

@@ -0,0 +1,19 @@
+qt_add_library(quickshell-wayland-windowsystem STATIC
+	windowmanager.cpp
+	windowset.cpp
+	ext_workspace.cpp
+)
+
+add_library(quickshell-wayland-windowsystem-init OBJECT init.cpp)
+target_link_libraries(quickshell-wayland-windowsystem-init PRIVATE Qt::Quick)
+
+wl_proto(wlp-ext-workspace ext-workspace-v1 "${WAYLAND_PROTOCOLS}/staging/ext-workspace")
+
+target_link_libraries(quickshell-wayland-windowsystem PRIVATE
+	Qt::Quick Qt::WaylandClient Qt::WaylandClientPrivate wayland-client
+	wlp-ext-workspace
+)
+
+qs_pch(quickshell-wayland-windowsystem SET large)
+
+target_link_libraries(quickshell PRIVATE quickshell-wayland-windowsystem quickshell-wayland-windowsystem-init)

src/wayland/windowmanager/ext_workspace.cpp

@@ -0,0 +1,176 @@
+#include "ext_workspace.hpp"
+
+#include <qcontainerfwd.h>
+#include <qlogging.h>
+#include <qloggingcategory.h>
+#include <qtmetamacros.h>
+#include <qtypes.h>
+#include <qwayland-ext-workspace-v1.h>
+#include <qwaylandclientextension.h>
+#include <wayland-ext-workspace-v1-client-protocol.h>
+#include <wayland-util.h>
+
+#include "../../core/logcat.hpp"
+
+namespace qs::wayland::workspace {
+
+QS_LOGGING_CATEGORY(logWorkspace, "quickshell.wm.wayland.workspace", QtWarningMsg);
+
+WorkspaceManager::WorkspaceManager(): QWaylandClientExtensionTemplate(1) { this->initialize(); }
+
+WorkspaceManager* WorkspaceManager::instance() {
+	static auto* instance = new WorkspaceManager();
+	return instance;
+}
+
+void WorkspaceManager::ext_workspace_manager_v1_workspace_group(
+    ::ext_workspace_group_handle_v1* handle
+) {
+	auto* group = new WorkspaceGroup(handle);
+	qCDebug(logWorkspace) << "Created group" << group;
+	this->mGroups.insert(handle, group);
+	emit this->groupCreated(group);
+}
+
+void WorkspaceManager::ext_workspace_manager_v1_workspace(::ext_workspace_handle_v1* handle) {
+	auto* workspace = new Workspace(handle);
+	qCDebug(logWorkspace) << "Created workspace" << workspace;
+	this->mWorkspaces.insert(handle, workspace);
+	emit this->workspaceCreated(workspace);
+};
+
+void WorkspaceManager::destroyWorkspace(Workspace* workspace) {
+	this->mWorkspaces.remove(workspace->object());
+	this->destroyedWorkspaces.append(workspace);
+	emit this->workspaceDestroyed(workspace);
+}
+
+void WorkspaceManager::destroyGroup(WorkspaceGroup* group) {
+	this->mGroups.remove(group->object());
+	this->destroyedGroups.append(group);
+	emit this->groupDestroyed(group);
+}
+
+void WorkspaceManager::ext_workspace_manager_v1_done() {
+	qCDebug(logWorkspace) << "Workspace changes done";
+	emit this->serverCommit();
+
+	for (auto* workspace: this->destroyedWorkspaces) delete workspace;
+	for (auto* group: this->destroyedGroups) delete group;
+	this->destroyedWorkspaces.clear();
+	this->destroyedGroups.clear();
+}
+
+void WorkspaceManager::ext_workspace_manager_v1_finished() {
+	qCWarning(logWorkspace) << "ext_workspace_manager_v1.finished() was received";
+}
+
+Workspace::~Workspace() {
+	if (this->isInitialized()) this->destroy();
+}
+
+void Workspace::ext_workspace_handle_v1_id(const QString& id) {
+	qCDebug(logWorkspace) << "Updated id for workspace" << this << "to" << id;
+	this->id = id;
+}
+
+void Workspace::ext_workspace_handle_v1_name(const QString& name) {
+	qCDebug(logWorkspace) << "Updated name for workspace" << this << "to" << name;
+	this->name = name;
+}
+
+void Workspace::ext_workspace_handle_v1_coordinates(wl_array* coordinates) {
+	this->coordinates.clear();
+
+	auto* data = static_cast<qint32*>(coordinates->data);
+	auto size = static_cast<qsizetype>(coordinates->size / sizeof(qint32));
+
+	for (auto i = 0; i != size; ++i) {
+		this->coordinates.append(data[i]); // NOLINT
+	}
+
+	qCDebug(logWorkspace) << "Updated coordinates for workspace" << this << "to" << this->coordinates;
+}
+
+void Workspace::ext_workspace_handle_v1_state(quint32 state) {
+	this->active = state & ext_workspace_handle_v1::state_active;
+	this->urgent = state & ext_workspace_handle_v1::state_urgent;
+	this->hidden = state & ext_workspace_handle_v1::state_hidden;
+
+	qCDebug(logWorkspace).nospace() << "Updated state for workspace " << this
+	                                << " to [active: " << this->active << ", urgent: " << this->urgent
+	                                << ", hidden: " << this->hidden << ']';
+}
+
+void Workspace::ext_workspace_handle_v1_capabilities(quint32 capabilities) {
+	this->canActivate = capabilities & ext_workspace_handle_v1::workspace_capabilities_activate;
+	this->canDeactivate = capabilities & ext_workspace_handle_v1::workspace_capabilities_deactivate;
+	this->canRemove = capabilities & ext_workspace_handle_v1::workspace_capabilities_remove;
+	this->canAssign = capabilities & ext_workspace_handle_v1::workspace_capabilities_assign;
+
+	qCDebug(logWorkspace).nospace() << "Updated capabilities for workspace " << this
+	                                << " to [activate: " << this->canActivate
+	                                << ", deactivate: " << this->canDeactivate
+	                                << ", remove: " << this->canRemove
+	                                << ", assign: " << this->canAssign << ']';
+}
+
+void Workspace::ext_workspace_handle_v1_removed() {
+	qCDebug(logWorkspace) << "Destroyed workspace" << this;
+	WorkspaceManager::instance()->destroyWorkspace(this);
+	this->destroy();
+}
+
+void Workspace::enterGroup(WorkspaceGroup* group) { this->group = group; }
+
+void Workspace::leaveGroup(WorkspaceGroup* group) {
+	if (this->group == group) this->group = nullptr;
+}
+
+WorkspaceGroup::~WorkspaceGroup() {
+	if (this->isInitialized()) this->destroy();
+}
+
+void WorkspaceGroup::ext_workspace_group_handle_v1_capabilities(quint32 capabilities) {
+	this->canCreateWorkspace =
+	    capabilities & ext_workspace_group_handle_v1::group_capabilities_create_workspace;
+
+	qCDebug(logWorkspace).nospace() << "Updated capabilities for group " << this
+	                                << " to [create_workspace: " << this->canCreateWorkspace << ']';
+}
+
+void WorkspaceGroup::ext_workspace_group_handle_v1_output_enter(::wl_output* output) {
+	qCDebug(logWorkspace) << "Output" << output << "added to group" << this;
+	this->screens.addOutput(output);
+}
+
+void WorkspaceGroup::ext_workspace_group_handle_v1_output_leave(::wl_output* output) {
+	qCDebug(logWorkspace) << "Output" << output << "removed from group" << this;
+	this->screens.removeOutput(output);
+}
+
+void WorkspaceGroup::ext_workspace_group_handle_v1_workspace_enter(
+    ::ext_workspace_handle_v1* handle
+) {
+	auto* workspace = WorkspaceManager::instance()->mWorkspaces.value(handle);
+	qCDebug(logWorkspace) << "Workspace" << workspace << "added to group" << this;
+
+	if (workspace) workspace->enterGroup(this);
+}
+
+void WorkspaceGroup::ext_workspace_group_handle_v1_workspace_leave(
+    ::ext_workspace_handle_v1* handle
+) {
+	auto* workspace = WorkspaceManager::instance()->mWorkspaces.value(handle);
+	qCDebug(logWorkspace) << "Workspace" << workspace << "removed from group" << this;
+
+	if (workspace) workspace->leaveGroup(this);
+}
+
+void WorkspaceGroup::ext_workspace_group_handle_v1_removed() {
+	qCDebug(logWorkspace) << "Destroyed group" << this;
+	WorkspaceManager::instance()->destroyGroup(this);
+	this->destroy();
+}
+
+} // namespace qs::wayland::workspace

src/wayland/windowmanager/ext_workspace.hpp

@@ -0,0 +1,117 @@
+#pragma once
+
+#include <qcontainerfwd.h>
+#include <qlist.h>
+#include <qloggingcategory.h>
+#include <qscreen.h>
+#include <qtclasshelpermacros.h>
+#include <qtmetamacros.h>
+#include <qtypes.h>
+#include <qwayland-ext-workspace-v1.h>
+#include <qwaylandclientextension.h>
+#include <wayland-ext-workspace-v1-client-protocol.h>
+
+#include "../../core/logcat.hpp"
+#include "../output_tracking.hpp"
+
+namespace qs::wayland::workspace {
+
+QS_DECLARE_LOGGING_CATEGORY(logWorkspace);
+
+class WorkspaceGroup;
+class Workspace;
+
+class WorkspaceManager
+    : public QWaylandClientExtensionTemplate<WorkspaceManager>
+    , public QtWayland::ext_workspace_manager_v1 {
+	Q_OBJECT;
+
+public:
+	static WorkspaceManager* instance();
+
+	[[nodiscard]] QList<Workspace*> workspaces() { return this->mWorkspaces.values(); }
+
+signals:
+	void serverCommit();
+	void workspaceCreated(Workspace* workspace);
+	void workspaceDestroyed(Workspace* workspace);
+	void groupCreated(WorkspaceGroup* group);
+	void groupDestroyed(WorkspaceGroup* group);
+
+protected:
+	void ext_workspace_manager_v1_workspace_group(::ext_workspace_group_handle_v1* handle) override;
+	void ext_workspace_manager_v1_workspace(::ext_workspace_handle_v1* handle) override;
+	void ext_workspace_manager_v1_done() override;
+	void ext_workspace_manager_v1_finished() override;
+
+private:
+	WorkspaceManager();
+
+	void destroyGroup(WorkspaceGroup* group);
+	void destroyWorkspace(Workspace* workspace);
+
+	QHash<::ext_workspace_handle_v1*, Workspace*> mWorkspaces;
+	QHash<::ext_workspace_group_handle_v1*, WorkspaceGroup*> mGroups;
+	QList<WorkspaceGroup*> destroyedGroups;
+	QList<Workspace*> destroyedWorkspaces;
+
+	friend class Workspace;
+	friend class WorkspaceGroup;
+};
+
+class Workspace: public QtWayland::ext_workspace_handle_v1 {
+public:
+	Workspace(::ext_workspace_handle_v1* handle): QtWayland::ext_workspace_handle_v1(handle) {}
+	~Workspace() override;
+	Q_DISABLE_COPY_MOVE(Workspace);
+
+	QString id;
+	QString name;
+	QList<qint32> coordinates;
+	WorkspaceGroup* group = nullptr;
+
+	bool active : 1 = false;
+	bool urgent : 1 = false;
+	bool hidden : 1 = false;
+
+	bool canActivate : 1 = false;
+	bool canDeactivate : 1 = false;
+	bool canRemove : 1 = false;
+	bool canAssign : 1 = false;
+
+protected:
+	void ext_workspace_handle_v1_id(const QString& id) override;
+	void ext_workspace_handle_v1_name(const QString& name) override;
+	void ext_workspace_handle_v1_coordinates(wl_array* coordinates) override;
+	void ext_workspace_handle_v1_state(quint32 state) override;
+	void ext_workspace_handle_v1_capabilities(quint32 capabilities) override;
+	void ext_workspace_handle_v1_removed() override;
+
+private:
+	void enterGroup(WorkspaceGroup* group);
+	void leaveGroup(WorkspaceGroup* group);
+
+	friend class WorkspaceGroup;
+};
+
+class WorkspaceGroup: public QtWayland::ext_workspace_group_handle_v1 {
+public:
+	WorkspaceGroup(::ext_workspace_group_handle_v1* handle)
+	    : QtWayland::ext_workspace_group_handle_v1(handle) {}
+
+	~WorkspaceGroup() override;
+	Q_DISABLE_COPY_MOVE(WorkspaceGroup);
+
+	WlOutputTracker screens;
+	bool canCreateWorkspace : 1 = false;
+
+protected:
+	void ext_workspace_group_handle_v1_capabilities(quint32 capabilities) override;
+	void ext_workspace_group_handle_v1_output_enter(::wl_output* output) override;
+	void ext_workspace_group_handle_v1_output_leave(::wl_output* output) override;
+	void ext_workspace_group_handle_v1_workspace_enter(::ext_workspace_handle_v1* handle) override;
+	void ext_workspace_group_handle_v1_workspace_leave(::ext_workspace_handle_v1* handle) override;
+	void ext_workspace_group_handle_v1_removed() override;
+};
+
+} // namespace qs::wayland::workspace

src/wayland/windowmanager/init.cpp

@@ -0,0 +1,23 @@
+#include <qcontainerfwd.h>
+#include <qguiapplication.h>
+#include <qlist.h>
+
+#include "../../core/plugin.hpp"
+
+namespace qs::wm::wayland {
+void installWmProvider();
+}
+
+namespace {
+
+class WaylandWmPlugin: public QsEnginePlugin {
+	QList<QString> dependencies() override { return {"window"}; }
+
+	bool applies() override { return QGuiApplication::platformName() == "wayland"; }
+
+	void init() override { qs::wm::wayland::installWmProvider(); }
+};
+
+QS_REGISTER_PLUGIN(WaylandWmPlugin);
+
+} // namespace

src/wayland/windowmanager/windowmanager.cpp

@@ -0,0 +1,21 @@
+#include "windowmanager.hpp"
+
+#include "../../windowmanager/windowmanager.hpp"
+#include "windowset.hpp"
+
+namespace qs::wm::wayland {
+
+WaylandWindowManager* WaylandWindowManager::instance() {
+	static auto* instance = []() {
+		auto* wm = new WaylandWindowManager();
+		WindowsetManager::instance();
+		return wm;
+	}();
+	return instance;
+}
+
+void installWmProvider() { // NOLINT (misc-use-internal-linkage)
+	qs::wm::WindowManager::setProvider([]() { return WaylandWindowManager::instance(); });
+}
+
+} // namespace qs::wm::wayland

src/wayland/windowmanager/windowmanager.hpp

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <qtmetamacros.h>
+
+#include "../../windowmanager/windowmanager.hpp"
+#include "windowset.hpp"
+
+namespace qs::wm::wayland {
+
+class WaylandWindowManager: public WindowManager {
+	Q_OBJECT;
+
+public:
+	static WaylandWindowManager* instance();
+};
+
+} // namespace qs::wm::wayland

src/wayland/windowmanager/windowset.cpp

@@ -0,0 +1,252 @@
+#include "windowset.hpp"
+
+#include <qlist.h>
+#include <qlogging.h>
+#include <qloggingcategory.h>
+#include <qnamespace.h>
+#include <qobject.h>
+#include <qobjectdefs.h>
+#include <qproperty.h>
+
+#include "../../windowmanager/windowmanager.hpp"
+#include "../../windowmanager/windowset.hpp"
+#include "../../windowmanager/screenprojection.hpp"
+#include "ext_workspace.hpp"
+
+namespace qs::wm::wayland {
+
+WindowsetManager::WindowsetManager() {
+	auto* impl = impl::WorkspaceManager::instance();
+
+	QObject::connect(
+	    impl,
+	    &impl::WorkspaceManager::serverCommit,
+	    this,
+	    &WindowsetManager::onServerCommit
+	);
+
+	QObject::connect(
+	    impl,
+	    &impl::WorkspaceManager::workspaceCreated,
+	    this,
+	    &WindowsetManager::onWindowsetCreated
+	);
+
+	QObject::connect(
+	    impl,
+	    &impl::WorkspaceManager::workspaceDestroyed,
+	    this,
+	    &WindowsetManager::onWindowsetDestroyed
+	);
+
+	QObject::connect(
+	    impl,
+	    &impl::WorkspaceManager::groupCreated,
+	    this,
+	    &WindowsetManager::onProjectionCreated
+	);
+
+	QObject::connect(
+	    impl,
+	    &impl::WorkspaceManager::groupDestroyed,
+	    this,
+	    &WindowsetManager::onProjectionDestroyed
+	);
+}
+
+void WindowsetManager::scheduleCommit() {
+	if (this->commitScheduled) {
+		qCDebug(impl::logWorkspace) << "Workspace commit already scheduled.";
+		return;
+	}
+
+	qCDebug(impl::logWorkspace) << "Scheduling workspace commit...";
+	this->commitScheduled = true;
+	QMetaObject::invokeMethod(this, &WindowsetManager::doCommit, Qt::QueuedConnection);
+}
+
+void WindowsetManager::doCommit() { // NOLINT
+	qCDebug(impl::logWorkspace) << "Committing workspaces...";
+	impl::WorkspaceManager::instance()->commit();
+	this->commitScheduled = false;
+}
+
+void WindowsetManager::onServerCommit() {
+	// Projections are created/destroyed around windowsets to avoid any nulls making it
+	// to the qml engine.
+
+	Qt::beginPropertyUpdateGroup();
+
+	auto* wm = WindowManager::instance();
+	auto windowsets = wm->bWindowsets.value();
+	auto projections = wm->bWindowsetProjections.value();
+
+	for (auto* projImpl: this->pendingProjectionCreations) {
+		auto* projection = new WlWindowsetProjection(this, projImpl);
+		this->projectionsByImpl.insert(projImpl, projection);
+		projections.append(projection);
+	}
+
+	for (auto* wsImpl: this->pendingWindowsetCreations) {
+		auto* ws = new WlWindowset(this, wsImpl);
+		this->windowsetByImpl.insert(wsImpl, ws);
+		windowsets.append(ws);
+	}
+
+	for (auto* wsImpl: this->pendingWindowsetDestructions) {
+		windowsets.removeOne(this->windowsetByImpl.value(wsImpl));
+		this->windowsetByImpl.remove(wsImpl);
+	}
+
+	for (auto* projImpl: this->pendingProjectionDestructions) {
+		projections.removeOne(this->projectionsByImpl.value(projImpl));
+		this->projectionsByImpl.remove(projImpl);
+	}
+
+	for (auto* ws: windowsets) {
+		static_cast<WlWindowset*>(ws)->commitImpl(); // NOLINT
+	}
+
+	for (auto* projection: projections) {
+		static_cast<WlWindowsetProjection*>(projection)->commitImpl(); // NOLINT
+	}
+
+	this->pendingWindowsetCreations.clear();
+	this->pendingWindowsetDestructions.clear();
+	this->pendingProjectionCreations.clear();
+	this->pendingProjectionDestructions.clear();
+
+	wm->bWindowsets = windowsets;
+	wm->bWindowsetProjections = projections;
+
+	Qt::endPropertyUpdateGroup();
+}
+
+void WindowsetManager::onWindowsetCreated(impl::Workspace* workspace) {
+	this->pendingWindowsetCreations.append(workspace);
+}
+
+void WindowsetManager::onWindowsetDestroyed(impl::Workspace* workspace) {
+	if (!this->pendingWindowsetCreations.removeOne(workspace)) {
+		this->pendingWindowsetDestructions.append(workspace);
+	}
+}
+
+void WindowsetManager::onProjectionCreated(impl::WorkspaceGroup* group) {
+	this->pendingProjectionCreations.append(group);
+}
+
+void WindowsetManager::onProjectionDestroyed(impl::WorkspaceGroup* group) {
+	if (!this->pendingProjectionCreations.removeOne(group)) {
+		this->pendingProjectionDestructions.append(group);
+	}
+}
+
+WindowsetManager* WindowsetManager::instance() {
+	static auto* instance = new WindowsetManager();
+	return instance;
+}
+
+WlWindowset::WlWindowset(WindowsetManager* manager, impl::Workspace* impl)
+    : Windowset(manager)
+    , impl(impl) {
+	this->commitImpl();
+}
+
+void WlWindowset::commitImpl() {
+	Qt::beginPropertyUpdateGroup();
+	this->bId = this->impl->id;
+	this->bName = this->impl->name;
+	this->bCoordinates = this->impl->coordinates;
+	this->bActive = this->impl->active;
+	this->bShouldDisplay = !this->impl->hidden;
+	this->bUrgent = this->impl->urgent;
+	this->bCanActivate = this->impl->canActivate;
+	this->bCanDeactivate = this->impl->canDeactivate;
+	this->bCanSetProjection = this->impl->canAssign;
+	this->bProjection = this->manager()->projectionsByImpl.value(this->impl->group);
+	Qt::endPropertyUpdateGroup();
+}
+
+void WlWindowset::activate() {
+	if (!this->bCanActivate) {
+		qCritical(logWorkspace) << this << "cannot be activated";
+		return;
+	}
+
+	qCDebug(impl::logWorkspace) << "Calling activate() for" << this;
+	this->impl->activate();
+	WindowsetManager::instance()->scheduleCommit();
+}
+
+void WlWindowset::deactivate() {
+	if (!this->bCanDeactivate) {
+		qCritical(logWorkspace) << this << "cannot be deactivated";
+		return;
+	}
+
+	qCDebug(impl::logWorkspace) << "Calling deactivate() for" << this;
+	this->impl->deactivate();
+	WindowsetManager::instance()->scheduleCommit();
+}
+
+void WlWindowset::remove() {
+	if (!this->bCanRemove) {
+		qCritical(logWorkspace) << this << "cannot be removed";
+		return;
+	}
+
+	qCDebug(impl::logWorkspace) << "Calling remove() for" << this;
+	this->impl->remove();
+	WindowsetManager::instance()->scheduleCommit();
+}
+
+void WlWindowset::setProjection(WindowsetProjection* projection) {
+	if (!this->bCanSetProjection) {
+		qCritical(logWorkspace) << this << "cannot be assigned to a projection";
+		return;
+	}
+
+	if (!projection) {
+		qCritical(logWorkspace) << "Cannot set a windowset's projection to null";
+		return;
+	}
+
+	WlWindowsetProjection* wlProjection = nullptr;
+	if (auto* p = dynamic_cast<WlWindowsetProjection*>(projection)) {
+		wlProjection = p;
+	} else if (auto* p = dynamic_cast<ScreenProjection*>(projection)) {
+		// In the 99% case, there will only be a single windowset on a screen.
+		// In the 1% case, the oldest projection (first in list) is most likely the desired one.
+		auto* screen = p->screen();
+		for (const auto& proj: WindowsetManager::instance()->projectionsByImpl.values()) {
+			if (proj->bQScreens.value().contains(screen)) {
+				wlProjection = proj;
+				break;
+			}
+		}
+	}
+
+	if (!wlProjection) {
+		qCritical(logWorkspace) << "Cannot set a windowset's projection to" << projection
+		                        << "as no wayland projection could be derived.";
+		return;
+	}
+
+	qCDebug(impl::logWorkspace) << "Assigning" << this << "to" << projection;
+	this->impl->assign(wlProjection->impl->object());
+	WindowsetManager::instance()->scheduleCommit();
+}
+
+WlWindowsetProjection::WlWindowsetProjection(WindowsetManager* manager, impl::WorkspaceGroup* impl)
+    : WindowsetProjection(manager)
+    , impl(impl) {
+	this->commitImpl();
+}
+
+void WlWindowsetProjection::commitImpl() {
+	// TODO: will not commit the correct screens if missing qt repr at commit time
+	this->bQScreens = this->impl->screens.screens();
+}
+
+} // namespace qs::wm::wayland

src/wayland/windowmanager/windowset.hpp

@@ -0,0 +1,85 @@
+#pragma once
+
+#include <qhash.h>
+#include <qlist.h>
+#include <qobject.h>
+#include <qproperty.h>
+#include <qtmetamacros.h>
+
+#include "../../windowmanager/windowset.hpp"
+#include "ext_workspace.hpp"
+
+namespace qs::wm::wayland {
+namespace impl = qs::wayland::workspace;
+
+class WlWindowset;
+class WlWindowsetProjection;
+
+class WindowsetManager: public QObject {
+	Q_OBJECT;
+
+public:
+	static WindowsetManager* instance();
+
+	void scheduleCommit();
+
+private slots:
+	void doCommit();
+	void onServerCommit();
+	void onWindowsetCreated(impl::Workspace* workspace);
+	void onWindowsetDestroyed(impl::Workspace* workspace);
+	void onProjectionCreated(impl::WorkspaceGroup* group);
+	void onProjectionDestroyed(impl::WorkspaceGroup* group);
+
+private:
+	WindowsetManager();
+
+	bool commitScheduled = false;
+
+	QList<impl::Workspace*> pendingWindowsetCreations;
+	QList<impl::Workspace*> pendingWindowsetDestructions;
+	QHash<impl::Workspace*, WlWindowset*> windowsetByImpl;
+
+	QList<impl::WorkspaceGroup*> pendingProjectionCreations;
+	QList<impl::WorkspaceGroup*> pendingProjectionDestructions;
+	QHash<impl::WorkspaceGroup*, WlWindowsetProjection*> projectionsByImpl;
+
+	friend class WlWindowset;
+};
+
+class WlWindowset: public Windowset {
+public:
+	WlWindowset(WindowsetManager* manager, impl::Workspace* impl);
+
+	void commitImpl();
+
+	void activate() override;
+	void deactivate() override;
+	void remove() override;
+	void setProjection(WindowsetProjection* projection) override;
+
+	[[nodiscard]] WindowsetManager* manager() {
+		return static_cast<WindowsetManager*>(this->parent()); // NOLINT
+	}
+
+private:
+	impl::Workspace* impl = nullptr;
+};
+
+class WlWindowsetProjection: public WindowsetProjection {
+public:
+	WlWindowsetProjection(WindowsetManager* manager, impl::WorkspaceGroup* impl);
+
+	void commitImpl();
+
+	[[nodiscard]] WindowsetManager* manager() {
+		return static_cast<WindowsetManager*>(this->parent()); // NOLINT
+	}
+
+private:
+	impl::WorkspaceGroup* impl = nullptr;
+
+	friend class WlWindowset;
+};
+
+} // namespace qs::wm::wayland