[mutter] clutter: Hook up pointer accessibility

[Carlos Garnacho <carlosg src gnome org>]

commit 1d76eace1ea5736c9c30069f8b45443cb5254a27
Author: Olivier Fourdan <ofourdan redhat com>
Date:   Fri May 24 15:02:39 2019 +0200

    clutter: Hook up pointer accessibility
    
    When using evdev (for Wayland), the backend receives all device events
    and queue them for clutter.
    
    Hook up the pointer accessibility handlers in clutter's main processing
    queue, so that we get better accuracy for pointer location.
    
    We need to avoid doing this on X11 though because X11 relies on the raw
    events for this to work reliably, so the same is already done in the
    X11 backend when using X11.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/512

 clutter/clutter/clutter-main.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
---
diff --git a/clutter/clutter/clutter-main.c b/clutter/clutter/clutter-main.c
index fbae4d995..66bc88de0 100644
--- a/clutter/clutter/clutter-main.c
+++ b/clutter/clutter/clutter-main.c
@@ -58,6 +58,7 @@
 #include "clutter-device-manager-private.h"
 #include "clutter-event-private.h"
 #include "clutter-feature.h"
+#include "clutter-input-pointer-a11y-private.h"
 #include "clutter-main.h"
 #include "clutter-master-clock.h"
 #include "clutter-mutter.h"
@@ -2261,6 +2262,21 @@ _clutter_process_event_details (ClutterActor        *stage,
         break;
 
       case CLUTTER_MOTION:
+#ifdef CLUTTER_WINDOWING_X11
+        if (!clutter_check_windowing_backend (CLUTTER_WINDOWING_X11))
+          {
+            if (_clutter_is_input_pointer_a11y_enabled (device))
+              {
+                ClutterInputDevice *core_pointer;
+                gfloat x, y;
+
+                clutter_event_get_coords (event, &x, &y);
+                core_pointer = clutter_device_manager_get_core_device (device->device_manager,
+                                                                       CLUTTER_POINTER_DEVICE);
+                _clutter_input_pointer_a11y_on_motion_event (core_pointer, x, y);
+              }
+          }
+#endif /* CLUTTER_WINDOWING_X11 */
         /* only the stage gets motion events if they are enabled */
         if (!clutter_stage_get_motion_events_enabled (CLUTTER_STAGE (stage)) &&
             event->any.source == NULL)
@@ -2299,6 +2315,22 @@ _clutter_process_event_details (ClutterActor        *stage,
       /* fallthrough from motion */
       case CLUTTER_BUTTON_PRESS:
       case CLUTTER_BUTTON_RELEASE:
+#ifdef CLUTTER_WINDOWING_X11
+        if (!clutter_check_windowing_backend (CLUTTER_WINDOWING_X11))
+          {
+            if (_clutter_is_input_pointer_a11y_enabled (device) && (event->type != CLUTTER_MOTION))
+              {
+                ClutterInputDevice *core_pointer;
+
+                core_pointer = clutter_device_manager_get_core_device (device->device_manager,
+                                                                       CLUTTER_POINTER_DEVICE);
+
+                _clutter_input_pointer_a11y_on_button_event (core_pointer,
+                                                             event->button.button,
+                                                             event->type == CLUTTER_BUTTON_PRESS);
+              }
+          }
+#endif /* CLUTTER_WINDOWING_X11 */
       case CLUTTER_SCROLL:
       case CLUTTER_TOUCHPAD_PINCH:
       case CLUTTER_TOUCHPAD_SWIPE: