Fix X11 xcb integration in Qt6.

CMakeLists.txt

@@ -77,8 +77,10 @@ endif()
 if (UNIX AND NOT APPLE AND NOT NO_X11)
     add_definitions(-DQZ_WS_X11)
     find_package(XCB REQUIRED COMPONENTS XCB UTIL)
+    if (NOT (QT_MAJOR_VERSION STREQUAL "6"))
         find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} REQUIRED COMPONENTS X11Extras)
     endif()
+endif()
 if (WIN32)
     add_definitions(-DW7API)
     find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} REQUIRED COMPONENTS WinExtras)

src/lib/CMakeLists.txt

@@ -620,7 +620,10 @@ endif()
 
 if (UNIX AND NOT APPLE)
     if (NOT NO_X11)
-        target_link_libraries(FalkonPrivate XCB::XCB Qt::X11Extras)
+        target_link_libraries(FalkonPrivate XCB::XCB)
+        if (NOT (QT_MAJOR_VERSION STREQUAL "6"))
+            target_link_libraries(FalkonPrivate Qt::X11Extras)
+        endif()
     endif()
 
     set_target_properties(FalkonPrivate PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION "3")

src/lib/app/browserwindow.cpp

@@ -82,7 +82,9 @@
 #include <QActionGroup>
 
 #ifdef QZ_WS_X11
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
 #include <QX11Info>
+#endif
 #include <xcb/xcb.h>
 #include <xcb/xcb_atom.h>
 #endif
@@ -1569,11 +1571,27 @@ void BrowserWindow::closeTab()
 }
 
 #ifdef QZ_WS_X11
+static xcb_connection_t *getXcbConnection()
+{
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
+    return QX11Info::connection();
+#else
+    const QNativeInterface::QX11Application *x11App = qApp->nativeInterface<QNativeInterface::QX11Application>();
+    if (x11App == nullptr)
+        return 0;
+    return x11App->connection();
+#endif
+}
+
 int BrowserWindow::getCurrentVirtualDesktop() const
 {
     if (QGuiApplication::platformName() != QL1S("xcb"))
         return 0;
 
+    xcb_connection_t *connection = getXcbConnection();
+    if (connection == 0)
+        return 0;
+
     xcb_intern_atom_cookie_t intern_atom;
     xcb_intern_atom_reply_t *atom_reply = 0;
     xcb_atom_t atom;
@@ -1581,16 +1599,16 @@ int BrowserWindow::getCurrentVirtualDesktop() const
     xcb_get_property_reply_t *reply = 0;
     uint32_t value;
 
-    intern_atom = xcb_intern_atom(QX11Info::connection(), false, qstrlen("_NET_WM_DESKTOP"), "_NET_WM_DESKTOP");
+    intern_atom = xcb_intern_atom(connection, false, qstrlen("_NET_WM_DESKTOP"), "_NET_WM_DESKTOP");
-    atom_reply = xcb_intern_atom_reply(QX11Info::connection(), intern_atom, 0);
+    atom_reply = xcb_intern_atom_reply(connection, intern_atom, 0);
 
     if (!atom_reply)
         goto error;
 
     atom = atom_reply->atom;
 
-    cookie = xcb_get_property(QX11Info::connection(), false, winId(), atom, XCB_ATOM_CARDINAL, 0, 1);
+    cookie = xcb_get_property(connection, false, winId(), atom, XCB_ATOM_CARDINAL, 0, 1);
-    reply = xcb_get_property_reply(QX11Info::connection(), cookie, 0);
+    reply = xcb_get_property_reply(connection, cookie, 0);
 
     if (!reply || reply->type != XCB_ATOM_CARDINAL || reply->value_len != 1 || reply->format != sizeof(uint32_t) * 8)
         goto error;
@@ -1616,19 +1634,23 @@ void BrowserWindow::moveToVirtualDesktop(int desktopId)
     if (desktopId < 0 || isVisible() || m_windowType == Qz::BW_FirstAppWindow)
         return;
 
+    xcb_connection_t *connection = getXcbConnection();
+    if (connection == 0)
+        return;
+
     xcb_intern_atom_cookie_t intern_atom;
     xcb_intern_atom_reply_t *atom_reply = 0;
     xcb_atom_t atom;
 
-    intern_atom = xcb_intern_atom(QX11Info::connection(), false, qstrlen("_NET_WM_DESKTOP"), "_NET_WM_DESKTOP");
+    intern_atom = xcb_intern_atom(connection, false, qstrlen("_NET_WM_DESKTOP"), "_NET_WM_DESKTOP");
-    atom_reply = xcb_intern_atom_reply(QX11Info::connection(), intern_atom, 0);
+    atom_reply = xcb_intern_atom_reply(connection, intern_atom, 0);
 
     if (!atom_reply)
         goto error;
 
     atom = atom_reply->atom;
 
-    xcb_change_property(QX11Info::connection(), XCB_PROP_MODE_REPLACE, winId(), atom,
+    xcb_change_property(connection, XCB_PROP_MODE_REPLACE, winId(), atom,
                         XCB_ATOM_CARDINAL, 32, 1, (const void*) &desktopId);
 
 error:

src/lib/tools/qztools.cpp

@@ -49,7 +49,9 @@
 #include <QtGuiVersion>
 
 #ifdef QZ_WS_X11
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
 #include <QX11Info>
+#endif
 #include <xcb/xcb.h>
 #endif
 
@@ -867,12 +869,30 @@ bool QzTools::startExternalProcess(const QString &executable, const QString &arg
     return success;
 }
 
+#ifdef QZ_WS_X11
+static xcb_connection_t *getXcbConnection()
+{
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
+    return QX11Info::connection();
+#else
+    const QNativeInterface::QX11Application *x11App = qApp->nativeInterface<QNativeInterface::QX11Application>();
+    if (x11App == nullptr)
+        return 0;
+    return x11App->connection();
+#endif
+}
+#endif
+
 void QzTools::setWmClass(const QString &name, const QWidget* widget)
 {
 #ifdef QZ_WS_X11
     if (QGuiApplication::platformName() != QL1S("xcb"))
         return;
 
+    xcb_connection_t *connection = getXcbConnection();
+    if (connection == 0)
+        return;
+
     const QByteArray nameData = name.toUtf8();
     const QByteArray classData = mApp->wmClass().isEmpty() ? QByteArrayLiteral("Falkon") : mApp->wmClass();
 
@@ -882,7 +902,7 @@ void QzTools::setWmClass(const QString &name, const QWidget* widget)
     qstrcpy(class_hint, nameData.constData());
     qstrcpy(class_hint + nameData.length() + 1, classData.constData());
 
-    xcb_change_property(QX11Info::connection(), XCB_PROP_MODE_REPLACE, widget->winId(),
+    xcb_change_property(connection, XCB_PROP_MODE_REPLACE, widget->winId(),
                         XCB_ATOM_WM_CLASS, XCB_ATOM_STRING, 8, class_len, class_hint);
 
     free(class_hint);