xcb: Implement native window helper for embeddedwindows/foreign window test

Pick-to: 6.6
Change-Id: I73720f8f49a5d7e5df7c95bf4b17ef910180e01c
Reviewed-by: Liang Qi <liang.qi@qt.io>

1 files changed, 77 insertions, 1 deletions

diff --git a/tests/shared/nativewindow.h b/tests/shared/nativewindow.h
index 1ab5fc40ce..087b7da0fc 100644
--- a/tests/shared/nativewindow.h
+++ b/tests/shared/nativewindow.h
@@ -12,6 +12,8 @@
 #  define VIEW_BASE UIView
 #elif defined(Q_OS_WIN)
 #  include <winuser.h>
+#elif QT_CONFIG(xcb)
+#  include <xcb/xcb.h>
 #endif
 
 class NativeWindow
@@ -21,7 +23,7 @@ public:
     NativeWindow();
     ~NativeWindow();
 
-    operator WId() const { return reinterpret_cast<WId>(m_handle); }
+    operator WId() const;
     WId parentWinId() const;
 
     void setGeometry(const QRect &rect);
@@ -32,6 +34,8 @@ private:
     VIEW_BASE *m_handle = nullptr;
 #elif defined(Q_OS_WIN)
     HWND m_handle = nullptr;
+#elif QT_CONFIG(xcb)
+    xcb_window_t m_handle = 0;
 #endif
 };
 
@@ -78,6 +82,11 @@ QRect NativeWindow::geometry() const
     return QRectF::fromCGRect(m_handle.frame).toRect();
 }
 
+NativeWindow::operator WId() const
+{
+    return reinterpret_cast<WId>(m_handle);
+}
+
 WId NativeWindow::parentWinId() const
 {
     return WId(m_handle.superview);
@@ -122,11 +131,78 @@ QRect NativeWindow::geometry() const
     return {};
 }
 
+NativeWindow::operator WId() const
+{
+    return reinterpret_cast<WId>(m_handle);
+}
+
 WId NativeWindow::parentWinId() const
 {
     return WId(GetAncestor(m_handle, GA_PARENT));
 }
 
+#elif QT_CONFIG(xcb)
+
+struct Connection
+{
+    Connection() : m_connection(xcb_connect(nullptr, nullptr)) {}
+    ~Connection() { xcb_disconnect(m_connection); }
+    operator xcb_connection_t*() const { return m_connection; }
+    xcb_connection_t *m_connection = nullptr;
+};
+
+static Connection connection;
+
+NativeWindow::NativeWindow()
+{
+    m_handle = xcb_generate_id(connection);
+
+    xcb_screen_t *screen = xcb_setup_roots_iterator(xcb_get_setup(connection)).data;
+
+    xcb_create_window(connection, XCB_COPY_FROM_PARENT, m_handle,
+        screen->root, 0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_OUTPUT,
+        screen->root_visual, XCB_CW_BACK_PIXEL,
+        (const uint32_t []){ 0xffffaaff });
+
+    xcb_flush(connection);
+}
+
+NativeWindow::~NativeWindow()
+{
+    xcb_destroy_window(connection, m_handle);
+}
+
+void NativeWindow::setGeometry(const QRect &rect)
+{
+    const quint32 mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y
+            | XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
+    const qint32 values[] = { rect.x(), rect.y(), rect.width(), rect.height() };
+    xcb_configure_window(connection, m_handle, mask,
+        reinterpret_cast<const quint32*>(values));
+    xcb_flush(connection);
+}
+
+QRect NativeWindow::geometry() const
+{
+    xcb_get_geometry_reply_t *geometry = xcb_get_geometry_reply(
+        connection, xcb_get_geometry(connection, m_handle), nullptr);
+    const auto cleanup = qScopeGuard([&]{ free(geometry); });
+    return QRect(geometry->x, geometry->y, geometry->width, geometry->height);
+}
+
+NativeWindow::operator WId() const
+{
+    return m_handle;
+}
+
+WId NativeWindow::parentWinId() const
+{
+    xcb_query_tree_reply_t *tree = xcb_query_tree_reply(
+        connection, xcb_query_tree(connection, m_handle), nullptr);
+    const auto cleanup = qScopeGuard([&]{ free(tree); });
+    return tree->parent;
+}
+
 #endif
 
 #endif // NATIVEWINDOW_H