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gdk: Implement GInitable on GdkDisplayManager

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Add GInitable interface with a default implementation that always
succeeds. This allows backends to override the GInitable implementation
and add their own checks to determine if the backend can be loaded.  If
a backend cannot be loaded, GDK can attempt to load the next available
backend.

Since backends may need to read any relevant options (such as the
display flag) to determine if they can be created successfully, this
patch also removes calls that attempt to create the display manager
before the options have been parsed.

https://bugzilla.gnome.org/show_bug.cgi?id=694465
This commit is contained in:
Thomas Wood 2013-02-22 16:41:12 +00:00 committed by Matthias Clasen
parent 75f4f7a471
commit 3a9de35a6c
2 changed files with 34 additions and 22 deletions
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3
gdk/gdk.c
View File

@ -275,9 +275,6 @@ gdk_pre_parse_libgtk_only (void)
else if (g_str_equal (rendering_mode, "recording"))
_gdk_rendering_mode = GDK_RENDERING_MODE_RECORDING;
}
/* Do any setup particular to the windowing system */
gdk_display_manager_get ();
}

53
gdk/gdkdisplaymanager.c
View File

@ -125,7 +125,24 @@ static void gdk_display_manager_get_property (GObject *object,
static guint signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GdkDisplayManager, gdk_display_manager, G_TYPE_OBJECT)
static void g_initable_iface_init (GInitableIface *iface);
G_DEFINE_TYPE_WITH_CODE (GdkDisplayManager, gdk_display_manager, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, g_initable_iface_init))
static gboolean
gdk_display_manager_initable_init (GInitable *initable,
GCancellable *cancellable,
GError **error)
{
return TRUE;
}
static void
g_initable_iface_init (GInitableIface *iface)
{
iface->init = gdk_display_manager_initable_init;
}
static void
gdk_display_manager_class_init (GdkDisplayManagerClass *klass)
@ -236,33 +253,31 @@ gdk_display_manager_get (void)
backend = g_getenv ("GDK_BACKEND");
#ifdef GDK_WINDOWING_QUARTZ
if (backend == NULL || strcmp (backend, "quartz") == 0)
manager = g_object_new (gdk_quartz_display_manager_get_type (), NULL);
else
manager = g_initable_new (gdk_quartz_display_manager_get_type (), NULL, NULL, NULL);
#endif
#ifdef GDK_WINDOWING_WIN32
if (backend == NULL || strcmp (backend, "win32") == 0)
manager = g_object_new (gdk_win32_display_manager_get_type (), NULL);
else
if (!manager && (backend == NULL || strcmp (backend, "win32") == 0))
manager = g_initable_new (gdk_win32_display_manager_get_type (), NULL, NULL, NULL);
#endif
#ifdef GDK_WINDOWING_X11
if (backend == NULL || strcmp (backend, "x11") == 0)
manager = g_object_new (gdk_x11_display_manager_get_type (), NULL);
else
if (!manager && (backend == NULL || strcmp (backend, "x11") == 0))
manager = g_initable_new (gdk_x11_display_manager_get_type (), NULL, NULL, NULL);
#endif
#ifdef GDK_WINDOWING_WAYLAND
if (backend == NULL || strcmp (backend, "wayland") == 0)
manager = g_object_new (gdk_wayland_display_manager_get_type (), NULL);
else
if (!manager && (backend == NULL || strcmp (backend, "wayland") == 0))
manager = g_initable_new (gdk_wayland_display_manager_get_type (), NULL, NULL, NULL);
#endif
#ifdef GDK_WINDOWING_BROADWAY
if (backend == NULL || strcmp (backend, "broadway") == 0)
manager = g_object_new (gdk_broadway_display_manager_get_type (), NULL);
else
if (!manager && (backend == NULL || strcmp (backend, "broadway") == 0))
manager = g_initable_new (gdk_broadway_display_manager_get_type (), NULL, NULL, NULL);
#endif
if (backend != NULL)
g_error ("Unsupported GDK backend: %s", backend);
else
g_error ("No GDK backend found");
if (!manager)
{
if (backend != NULL)
g_error ("Unsupported GDK backend: %s", backend);
else
g_error ("No GDK backend found");
}
}
return manager;