qt5-qtwayland/qtwayland-client-expose-toplevel-window-state.patch

From d533901938a996367d7b6f87b0214f5a17098aed Mon Sep 17 00:00:00 2001
From: Jan Grulich <jgrulich@redhat.com>
Date: Tue, 23 Mar 2021 16:03:22 +0100
Subject: [PATCH] Client: expose toplevel window state

QWaylandWindow has only basic information about window state, like if
it's active or maximized, but it has no information about tiling, which
can be useful for client-side decorations. We also need to bump version
of xdg-shell protocol we support, because additional states are not in
the version currently supported by QtWayland. It shouldn't be a problem
to increase the version as the new version adds just these additional
window states.

Change-Id: I4c46516d9c7296c69ea51a022b3bdb4ca06bef8d
Reviewed-by: David Edmundson <davidedmundson@kde.org>
---
 src/client/qwaylandwindow.cpp                    | 15 +++++++++++++++
 src/client/qwaylandwindow_p.h                    | 16 ++++++++++++++++
 .../xdg-shell/qwaylandxdgshell.cpp               | 16 +++++++++++++++-
 .../xdg-shell/qwaylandxdgshell_p.h               |  3 ++-
 4 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/src/client/qwaylandwindow.cpp b/src/client/qwaylandwindow.cpp
index c35ccab15..65a914976 100644
--- a/src/client/qwaylandwindow.cpp
+++ b/src/client/qwaylandwindow.cpp
@@ -1107,6 +1107,21 @@ bool QWaylandWindow::setMouseGrabEnabled(bool grab)
     return true;
 }

+QWaylandWindow::ToplevelWindowTilingStates QWaylandWindow::toplevelWindowTilingStates() const
+{
+    return mLastReportedToplevelWindowTilingStates;
+}
+
+void QWaylandWindow::handleToplevelWindowTilingStatesChanged(ToplevelWindowTilingStates states)
+{
+    mLastReportedToplevelWindowTilingStates = states;
+}
+
+Qt::WindowStates QWaylandWindow::windowStates() const
+{
+    return mLastReportedWindowStates;
+}
+
 void QWaylandWindow::handleWindowStatesChanged(Qt::WindowStates states)
 {
     createDecoration();
diff --git a/src/client/qwaylandwindow_p.h b/src/client/qwaylandwindow_p.h
index 5f134568b..1d743f4e4 100644
--- a/src/client/qwaylandwindow_p.h
+++ b/src/client/qwaylandwindow_p.h
@@ -95,6 +95,15 @@ class Q_WAYLAND_CLIENT_EXPORT QWaylandWindow : public QObject, public QPlatformW
         Vulkan
     };

+    enum ToplevelWindowTilingState {
+        WindowNoState = 0,
+        WindowTiledLeft = 1,
+        WindowTiledRight = 2,
+        WindowTiledTop = 4,
+        WindowTiledBottom = 8
+    };
+    Q_DECLARE_FLAGS(ToplevelWindowTilingStates, ToplevelWindowTilingState)
+
     QWaylandWindow(QWindow *window, QWaylandDisplay *display);
     ~QWaylandWindow() override;

@@ -145,6 +154,10 @@ class Q_WAYLAND_CLIENT_EXPORT QWaylandWindow : public QObject, public QPlatformW
     void handleContentOrientationChange(Qt::ScreenOrientation orientation) override;
     void setOrientationMask(Qt::ScreenOrientations mask);

+    ToplevelWindowTilingStates toplevelWindowTilingStates() const;
+    void handleToplevelWindowTilingStatesChanged(ToplevelWindowTilingStates states);
+
+    Qt::WindowStates windowStates() const;
     void setWindowState(Qt::WindowStates states) override;
     void setWindowFlags(Qt::WindowFlags flags) override;
     void handleWindowStatesChanged(Qt::WindowStates states);
@@ -260,6 +273,7 @@ public slots:
     QRegion mMask;
     QRegion mOpaqueArea;
     Qt::WindowStates mLastReportedWindowStates = Qt::WindowNoState;
+    ToplevelWindowTilingStates mLastReportedToplevelWindowTilingStates = WindowNoState;

     QWaylandShmBackingStore *mBackingStore = nullptr;
     QWaylandBuffer *mQueuedBuffer = nullptr;
@@ -295,6 +309,8 @@ public slots:
     friend class QWaylandSubSurface;
 };

+Q_DECLARE_OPERATORS_FOR_FLAGS(QWaylandWindow::ToplevelWindowTilingStates)
+
 inline QIcon QWaylandWindow::windowIcon() const
 {
     return mWindowIcon;
diff --git a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp
index 965bc261d..5d9a21f81 100644
--- a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp
+++ b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell.cpp
@@ -94,6 +94,7 @@ void QWaylandXdgSurface::Toplevel::applyConfigure()
     // TODO: none of the other plugins send WindowActive either, but is it on purpose?
     Qt::WindowStates statesWithoutActive = m_pending.states & ~Qt::WindowActive;

+    m_xdgSurface->m_window->handleToplevelWindowTilingStatesChanged(m_toplevelStates);
     m_xdgSurface->m_window->handleWindowStatesChanged(statesWithoutActive);

     if (m_pending.size.isEmpty()) {
@@ -126,6 +127,7 @@ void QWaylandXdgSurface::Toplevel::xdg_toplevel_configure(int32_t width, int32_t
     size_t numStates = states->size / sizeof(uint32_t);

     m_pending.states = Qt::WindowNoState;
+    m_toplevelStates = QWaylandWindow::WindowNoState;

     for (size_t i = 0; i < numStates; i++) {
         switch (xdgStates[i]) {
@@ -138,6 +140,18 @@ void QWaylandXdgSurface::Toplevel::xdg_toplevel_configure(int32_t width, int32_t
         case XDG_TOPLEVEL_STATE_FULLSCREEN:
             m_pending.states |= Qt::WindowFullScreen;
             break;
+        case XDG_TOPLEVEL_STATE_TILED_LEFT:
+            m_toplevelStates |= QWaylandWindow::WindowTiledLeft;
+            break;
+        case XDG_TOPLEVEL_STATE_TILED_RIGHT:
+            m_toplevelStates |= QWaylandWindow::WindowTiledRight;
+            break;
+        case XDG_TOPLEVEL_STATE_TILED_TOP:
+            m_toplevelStates |= QWaylandWindow::WindowTiledTop;
+            break;
+        case XDG_TOPLEVEL_STATE_TILED_BOTTOM:
+            m_toplevelStates |= QWaylandWindow::WindowTiledBottom;
+            break;
         default:
             break;
         }
@@ -469,7 +483,7 @@ void QWaylandXdgSurface::xdg_surface_configure(uint32_t serial)
 }

 QWaylandXdgShell::QWaylandXdgShell(QWaylandDisplay *display, uint32_t id, uint32_t availableVersion)
-    : QtWayland::xdg_wm_base(display->wl_registry(), id, qMin(availableVersion, 1u))
+    : QtWayland::xdg_wm_base(display->wl_registry(), id, qMin(availableVersion, 2u))
     , m_display(display)
 {
     display->addRegistryListener(&QWaylandXdgShell::handleRegistryGlobal, this);
diff --git a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell_p.h b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell_p.h
index 5aeec2eb9..e3a90c547 100644
--- a/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell_p.h
+++ b/src/plugins/shellintegration/xdg-shell/qwaylandxdgshell_p.h
@@ -58,6 +58,7 @@

 #include <QtWaylandClient/qtwaylandclientglobal.h>
 #include <QtWaylandClient/private/qwaylandshellsurface_p.h>
+#include <QtWaylandClient/private/qwaylandwindow_p.h>

 #include <QtCore/QSize>
 #include <QtGui/QRegion>
@@ -69,7 +70,6 @@ class QWindow;
 namespace QtWaylandClient {

 class QWaylandDisplay;
-class QWaylandWindow;
 class QWaylandInputDevice;
 class QWaylandXdgShell;

@@ -125,6 +125,7 @@ class Q_WAYLAND_CLIENT_EXPORT QWaylandXdgSurface : public QWaylandShellSurface,
             QSize size = {0, 0};
             Qt::WindowStates states = Qt::WindowNoState;
         }  m_pending, m_applied;
+        QWaylandWindow::ToplevelWindowTilingStates m_toplevelStates = QWaylandWindow::WindowNoState;
         QSize m_normalSize;

         QWaylandXdgSurface *m_xdgSurface = nullptr;