[mutter/wip/xinput2r: 52/68] core: enable XInput2 by default

[Jasper St. Pierre <jstpierre src gnome org>]

commit 33917053f84b6ddfdc5273d61550a1df9e23b57c
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Jul 9 18:49:35 2011 +0200

    core: enable XInput2 by default
    
    This is nothing but the beginning, things work with a single
    pointer/keyboard pair, but will be largely broken with multiple
    devices interacting simultaneously, so we first need a policy
    to establish a sensible behavior for extra pointer/keyboard
    pairs.
    
    the MUTTER_USE_CORE_DEVICES envvar has been added to force use
    of Xlib core events for devices in order to check for regressions.

 src/core/display.c |    3 ++-
 src/core/main.c    |    7 ++++++-
 src/core/util.c    |   13 +++++++++++++
 src/meta/util.h    |    3 +++
 src/ui/ui.c        |   11 ++---------
 5 files changed, 26 insertions(+), 11 deletions(-)
---
diff --git a/src/core/display.c b/src/core/display.c
index 34668e7..9eea880 100644
--- a/src/core/display.c
+++ b/src/core/display.c
@@ -552,7 +552,8 @@ meta_display_open (void)
   the_display->static_gravity_works = g_getenv ("MUTTER_USE_STATIC_GRAVITY") != NULL;
   
   meta_bell_init (the_display);
-  the_display->device_map = meta_device_map_new (the_display, TRUE);
+  the_display->device_map = meta_device_map_new (the_display,
+                                                 meta_get_use_core_devices ());
 
   meta_display_init_keys (the_display);
 
diff --git a/src/core/main.c b/src/core/main.c
index 00f36ed..9d9cfde 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -301,9 +301,12 @@ static GSourceFuncs event_funcs = {
 static void
 meta_clutter_init (void)
 {
+  if (!meta_get_use_core_devices ())
+    clutter_x11_enable_xinput ();
+
   clutter_x11_set_display (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()));
   clutter_x11_disable_event_retrieval ();
-  
+
   if (CLUTTER_INIT_SUCCESS == clutter_init (NULL, NULL))
     {
       GSource *source = g_source_new (&event_funcs, sizeof (GSource));
@@ -414,6 +417,8 @@ meta_init (void)
     meta_set_verbose (TRUE);
   if (g_getenv ("MUTTER_DEBUG"))
     meta_set_debugging (TRUE);
+  if (g_getenv ("MUTTER_USE_CORE_DEVICES"))
+    meta_set_use_core_devices (TRUE);
 
   if (g_get_home_dir ())
     if (chdir (g_get_home_dir ()) < 0)
diff --git a/src/core/util.c b/src/core/util.c
index 0ab87bb..81c0f8f 100644
--- a/src/core/util.c
+++ b/src/core/util.c
@@ -50,6 +50,7 @@ meta_topic_real_valist (MetaDebugTopic topic,
 static gint verbose_topics = 0;
 static gboolean is_debugging = FALSE;
 static gboolean replace_current = FALSE;
+static gboolean use_core_devices = FALSE;
 static int no_prefix = 0;
 
 #ifdef WITH_VERBOSE_MODE
@@ -179,6 +180,18 @@ meta_set_debugging (gboolean setting)
 }
 
 gboolean
+meta_get_use_core_devices (void)
+{
+  return use_core_devices;
+}
+
+void
+meta_set_use_core_devices (gboolean setting)
+{
+  use_core_devices = setting;
+}
+
+gboolean
 meta_get_replace_current_wm (void)
 {
   return replace_current;
diff --git a/src/meta/util.h b/src/meta/util.h
index 04bb7bf..c1b2bd9 100644
--- a/src/meta/util.h
+++ b/src/meta/util.h
@@ -38,6 +38,9 @@ gboolean meta_is_syncing (void);
 void     meta_set_syncing (gboolean setting);
 void     meta_set_replace_current_wm (gboolean setting);
 
+gboolean meta_get_use_core_devices (void);
+void     meta_set_use_core_devices (gboolean setting);
+
 void meta_debug_spew_real (const char *format,
                            ...) G_GNUC_PRINTF (1, 2);
 void meta_verbose_real    (const char *format,
diff --git a/src/ui/ui.c b/src/ui/ui.c
index 5650574..87419d9 100644
--- a/src/ui/ui.c
+++ b/src/ui/ui.c
@@ -61,15 +61,8 @@ struct _MetaUI
 void
 meta_ui_init (void)
 {
-  /* As of 2.91.7, Gdk uses XI2 by default, which conflicts with the
-   * direct X calls we use - in particular, events caused by calls to
-   * XGrabPointer/XGrabKeyboard are no longer understood by GDK, while
-   * GDK will no longer generate the core XEvents we process.
-   * So at least for now, enforce the previous behavior.
-   */
-#if GTK_CHECK_VERSION(2, 91, 7)
-  gdk_disable_multidevice ();
-#endif
+  if (meta_get_use_core_devices ())
+    gdk_disable_multidevice ();
 
   if (!gtk_init_check (NULL, NULL))
     meta_fatal ("Unable to open X display %s\n", XDisplayName (NULL));