Support XDG activation

QWaylandLayerShellIntegration has virtual hooks for Xdg Activation.

This is important to hook up in layer shell because activation using
requestActivate in Qt will go through this path. It also means we have
support for us to drop the implementation in KWindowSystem in favour of
calling into Qt.

src/CMakeLists.txt

@@ -6,10 +6,11 @@ remove_definitions(-DQT_NO_SIGNALS_SLOTS_KEYWORDS)
 add_library(LayerShellQtInterface)
 qt6_generate_wayland_protocol_client_sources(LayerShellQtInterface FILES
     ${WaylandProtocols_DATADIR}/stable/xdg-shell/xdg-shell.xml
+    ${WaylandProtocols_DATADIR}/staging/xdg-activation/xdg-activation-v1.xml
     ${CMAKE_CURRENT_SOURCE_DIR}/wlr-layer-shell-unstable-v1.xml
 )
 
-ecm_qt_declare_logging_category(LAYER_SHELL_SOURCES
+ecm_qt_declare_logging_category(LayerShellQtInterface
     HEADER
         layershellqt_logging.h
     IDENTIFIER
@@ -18,7 +19,14 @@ ecm_qt_declare_logging_category(LAYER_SHELL_SOURCES
         layershellqt
 )
 
-target_sources(LayerShellQtInterface PRIVATE qwaylandlayersurface.cpp interfaces/window.cpp interfaces/shell.cpp qwaylandlayershellintegration.cpp ${LAYER_SHELL_SOURCES})
+target_sources(LayerShellQtInterface PRIVATE
+    qwaylandxdgactivationv1.cpp
+    qwaylandlayersurface.cpp
+    qwaylandlayershellintegration.cpp
+    interfaces/window.cpp
+    interfaces/shell.cpp
+)
+
 target_link_libraries(LayerShellQtInterface PUBLIC Qt::Gui)
 target_link_libraries(LayerShellQtInterface PRIVATE Qt::WaylandClientPrivate Wayland::Client PkgConfig::XKBCOMMON)
 if (TARGET Qt::XkbCommonSupportPrivate)

src/qwaylandlayershellintegration.cpp

@@ -7,6 +7,7 @@
 
 #include "qwaylandlayershellintegration_p.h"
 #include "qwaylandlayersurface_p.h"
+#include "qwaylandxdgactivationv1_p.h"
 
 #include <QtWaylandClient/private/qwaylanddisplay_p.h>
 #include <QtWaylandClient/private/qwaylandwindow_p.h>
@@ -15,6 +16,7 @@ namespace LayerShellQt
 {
 QWaylandLayerShellIntegration::QWaylandLayerShellIntegration()
     : QWaylandShellIntegrationTemplate<QWaylandLayerShellIntegration>(4)
+    , m_xdgActivation(new QWaylandXdgActivationV1)
 {
 }
 

src/qwaylandlayershellintegration_p.h

@@ -13,6 +13,8 @@
 #include <QtWaylandClient/private/qwaylandshellintegration_p.h>
 #include <qwayland-wlr-layer-shell-unstable-v1.h>
 
+class QWaylandXdgActivationV1;
+
 namespace LayerShellQt
 {
 
@@ -22,7 +24,10 @@ public:
     QWaylandLayerShellIntegration();
     ~QWaylandLayerShellIntegration() override;
 
+    QWaylandXdgActivationV1 *activation() const { return m_xdgActivation.data(); }
     QtWaylandClient::QWaylandShellSurface *createShellSurface(QtWaylandClient::QWaylandWindow *window) override;
+private:
+    QScopedPointer<QWaylandXdgActivationV1> m_xdgActivation;
 };
 
 }

src/qwaylandlayersurface.cpp

@@ -8,16 +8,20 @@
 #include "interfaces/window.h"
 #include "layershellqt_logging.h"
 #include "qwaylandlayersurface_p.h"
+#include "qwaylandxdgactivationv1_p.h"
 
 #include <QtWaylandClient/private/qwaylandscreen_p.h>
 #include <QtWaylandClient/private/qwaylandsurface_p.h>
 #include <QtWaylandClient/private/qwaylandwindow_p.h>
 
+#include <QGuiApplication>
+
 namespace LayerShellQt
 {
-QWaylandLayerSurface::QWaylandLayerSurface(QtWayland::zwlr_layer_shell_v1 *shell, QtWaylandClient::QWaylandWindow *window)
+QWaylandLayerSurface::QWaylandLayerSurface(QWaylandLayerShellIntegration *shell, QtWaylandClient::QWaylandWindow *window)
     : QtWaylandClient::QWaylandShellSurface(window)
     , QtWayland::zwlr_layer_surface_v1()
+    , m_shell(shell)
     , m_interface(Window::get(window->window()))
 {
     wl_output *output = nullptr;
@@ -155,4 +159,54 @@ void QWaylandLayerSurface::setWindowGeometry(const QRect &geometry)
     set_size(size.width(), size.height());
 }
 
+bool QWaylandLayerSurface::requestActivate()
+{
+    QWaylandXdgActivationV1 *activation = m_shell->activation();
+    if (!activation->isActive()) {
+        return false;
     }
+    if (!m_activationToken.isEmpty()) {
+        activation->activate(m_activationToken, window()->wlSurface());
+        m_activationToken = {};
+        return true;
+    } else {
+        const auto focusWindow = QGuiApplication::focusWindow();
+        const auto wlWindow = focusWindow ? static_cast<QtWaylandClient::QWaylandWindow*>(focusWindow->handle()) : window();
+        if (const auto seat = wlWindow->display()->lastInputDevice()) {
+            const auto tokenProvider = activation->requestXdgActivationToken(
+                wlWindow->display(), wlWindow->wlSurface(), 0, QString());
+            connect(tokenProvider, &QWaylandXdgActivationTokenV1::done, this,
+                    [this](const QString &token) {
+                        m_shell->activation()->activate(token, window()->wlSurface());
+                    });
+            connect(tokenProvider, &QWaylandXdgActivationTokenV1::done, tokenProvider, &QObject::deleteLater);
+            return true;
+        }
+    }
+    return false;
+}
+
+void QWaylandLayerSurface::setXdgActivationToken(const QString &token)
+{
+    m_activationToken = token;
+}
+
+void QWaylandLayerSurface::requestXdgActivationToken(quint32 serial)
+{
+    QWaylandXdgActivationV1 *activation = m_shell->activation();
+    if (!activation->isActive()) {
+        return;
+    }
+    auto tokenProvider = activation->requestXdgActivationToken(
+        window()->display(), window()->wlSurface(), serial, QString());
+
+    connect(tokenProvider, &QWaylandXdgActivationTokenV1::done, this,
+            [this](const QString &token) {
+                Q_EMIT window()->xdgActivationTokenCreated(token);
+            });
+    connect(tokenProvider, &QWaylandXdgActivationTokenV1::done, tokenProvider, &QObject::deleteLater);
+
+}
+
+}
+

src/qwaylandlayersurface_p.h

@@ -10,6 +10,8 @@
 
 #include <wayland-client.h>
 
+#include "qwaylandlayershellintegration_p.h"
+
 #include "layershellqt_export.h"
 #include <QtWaylandClient/private/qwaylandshellsurface_p.h>
 #include <qwayland-wlr-layer-shell-unstable-v1.h>
@@ -23,7 +25,7 @@ class LAYERSHELLQT_EXPORT QWaylandLayerSurface : public QtWaylandClient::QWaylan
 {
     Q_OBJECT
 public:
-    QWaylandLayerSurface(QtWayland::zwlr_layer_shell_v1 *shell, QtWaylandClient::QWaylandWindow *window);
+    QWaylandLayerSurface(QWaylandLayerShellIntegration *shell, QtWaylandClient::QWaylandWindow *window);
     ~QWaylandLayerSurface() override;
 
     bool isExposed() const override
@@ -43,12 +45,18 @@ public:
     void applyConfigure() override;
     void setWindowGeometry(const QRect &geometry) override;
 
+    bool requestActivate() override;
+    void setXdgActivationToken(const QString &token) override;
+    void requestXdgActivationToken(quint32 serial) override;
+
 private:
     void zwlr_layer_surface_v1_configure(uint32_t serial, uint32_t width, uint32_t height) override;
     void zwlr_layer_surface_v1_closed() override;
 
+    QWaylandLayerShellIntegration *m_shell;
     LayerShellQt::Window *m_interface;
     QSize m_pendingSize;
+    QString m_activationToken;
     bool m_configured = false;
 };
 

src/qwaylandxdgactivationv1.cpp

@@ -0,0 +1,44 @@
+/** Copyright (C) 2020 Aleix Pol Gonzalez <aleixpol@kde.org>
+ *   SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
+#include "qwaylandxdgactivationv1_p.h"
+#include <QtWaylandClient/private/qwaylanddisplay_p.h>
+#include <QtWaylandClient/private/qwaylandinputdevice_p.h>
+
+QWaylandXdgActivationV1::QWaylandXdgActivationV1()
+    : QWaylandClientExtensionTemplate<QWaylandXdgActivationV1>(1)
+{
+    initialize();
+}
+
+QWaylandXdgActivationV1::~QWaylandXdgActivationV1()
+{
+    if (isActive()) {
+        destroy();
+    }
+}
+
+QWaylandXdgActivationTokenV1 *QWaylandXdgActivationV1::requestXdgActivationToken(QtWaylandClient::QWaylandDisplay *display,
+                                                                                 struct ::wl_surface *surface,
+                                                                                 std::optional<uint32_t> serial,
+                                                                                 const QString &app_id)
+{
+    auto wl = get_activation_token();
+    auto provider = new QWaylandXdgActivationTokenV1;
+    provider->init(wl);
+
+    if (surface) {
+        provider->set_surface(surface);
+    }
+    if (!app_id.isEmpty()) {
+        provider->set_app_id(app_id);
+    }
+    if (serial && display->lastInputDevice()) {
+        provider->set_serial(*serial, display->lastInputDevice()->wl_seat());
+    }
+    provider->commit();
+    return provider;
+}
+
+#include "moc_qwaylandxdgactivationv1_p.cpp"

src/qwaylandxdgactivationv1_p.h

@@ -0,0 +1,48 @@
+/** Copyright (C) 2020 Aleix Pol Gonzalez <aleixpol@kde.org>
+ *  SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
+#ifndef QWAYLANDXDGACTIVATIONV1_P_H
+#define QWAYLANDXDGACTIVATIONV1_P_H
+
+#include "qwayland-xdg-activation-v1.h"
+#include <QObject>
+
+#include <QtWaylandClient/QWaylandClientExtension>
+
+namespace QtWaylandClient
+{
+class QWaylandDisplay;
+class QWaylandSurface;
+}
+
+class QWaylandXdgActivationTokenV1 : public QObject, public QtWayland::xdg_activation_token_v1
+{
+    Q_OBJECT
+public:
+    ~QWaylandXdgActivationTokenV1() override
+    {
+        destroy();
+    }
+
+protected:
+    void xdg_activation_token_v1_done(const QString &token) override
+    {
+        Q_EMIT done(token);
+    }
+
+Q_SIGNALS:
+    void done(const QString &token);
+};
+
+class QWaylandXdgActivationV1 : public QWaylandClientExtensionTemplate<QWaylandXdgActivationV1>, public QtWayland::xdg_activation_v1
+{
+public:
+    QWaylandXdgActivationV1();
+    ~QWaylandXdgActivationV1() override;
+
+    QWaylandXdgActivationTokenV1 *
+    requestXdgActivationToken(QtWaylandClient::QWaylandDisplay *display, struct ::wl_surface *surface, std::optional<uint32_t> serial, const QString &app_id);
+};
+
+#endif // QWAYLANDXDGACTIVATIONV1_P_H