[gtk+] gdk: Add GDK_SEAT_CAPABILITY_TABLET_PAD

[Matthias Clasen <matthiasc src gnome org>]

commit 7531be3510baf4d2ded80b780ff1c02f268bfcb0
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Nov 27 21:39:05 2017 +0100

    gdk: Add GDK_SEAT_CAPABILITY_TABLET_PAD
    
    Tablet pads don't adapt really well to any other capability, so add a
    distinct one to be able to query those properly.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=790920

 gdk/gdkseat.h                   |    4 +++-
 gdk/gdkseatdefault.c            |   12 +++++++-----
 gdk/wayland/gdkdevice-wayland.c |   11 +++++++++++
 3 files changed, 21 insertions(+), 6 deletions(-)
---
diff --git a/gdk/gdkseat.h b/gdk/gdkseat.h
index f60b93d..c7bc64d 100644
--- a/gdk/gdkseat.h
+++ b/gdk/gdkseat.h
@@ -42,6 +42,7 @@ G_BEGIN_DECLS
  * @GDK_SEAT_CAPABILITY_TOUCH: The seat has touchscreen(s) attached
  * @GDK_SEAT_CAPABILITY_TABLET_STYLUS: The seat has drawing tablet(s) attached
  * @GDK_SEAT_CAPABILITY_KEYBOARD: The seat has keyboard(s) attached
+ * @GDK_SEAT_CAPABILITY_TABLET_PAD: The seat has drawing tablet pad(s) attached
  * @GDK_SEAT_CAPABILITY_ALL_POINTING: The union of all pointing capabilities
  * @GDK_SEAT_CAPABILITY_ALL: The union of all capabilities
  *
@@ -55,6 +56,7 @@ typedef enum {
   GDK_SEAT_CAPABILITY_TOUCH         = 1 << 1,
   GDK_SEAT_CAPABILITY_TABLET_STYLUS = 1 << 2,
   GDK_SEAT_CAPABILITY_KEYBOARD      = 1 << 3,
+  GDK_SEAT_CAPABILITY_TABLET_PAD    = 1 << 4,
   GDK_SEAT_CAPABILITY_ALL_POINTING  = (GDK_SEAT_CAPABILITY_POINTER | GDK_SEAT_CAPABILITY_TOUCH | 
GDK_SEAT_CAPABILITY_TABLET_STYLUS),
   GDK_SEAT_CAPABILITY_ALL           = (GDK_SEAT_CAPABILITY_ALL_POINTING | GDK_SEAT_CAPABILITY_KEYBOARD)
 } GdkSeatCapabilities;
@@ -112,7 +114,7 @@ GdkDevice *    gdk_seat_get_pointer      (GdkSeat             *seat);
 GDK_AVAILABLE_IN_3_20
 GdkDevice *    gdk_seat_get_keyboard     (GdkSeat             *seat);
 
-GDK_AVAILABLE_IN_3_93
+GDK_AVAILABLE_IN_3_94
 GList *        gdk_seat_get_master_pointers (GdkSeat             *seat,
                                              GdkSeatCapabilities  capabilities);
 
diff --git a/gdk/gdkseatdefault.c b/gdk/gdkseatdefault.c
index bf3f410..382cc04 100644
--- a/gdk/gdkseatdefault.c
+++ b/gdk/gdkseatdefault.c
@@ -226,10 +226,11 @@ device_get_capability (GdkDevice *device)
     case GDK_SOURCE_ERASER:
     case GDK_SOURCE_CURSOR:
       return GDK_SEAT_CAPABILITY_TABLET_STYLUS;
+    case GDK_SOURCE_TABLET_PAD:
+      return GDK_SEAT_CAPABILITY_TABLET_PAD;
     case GDK_SOURCE_MOUSE:
     case GDK_SOURCE_TOUCHPAD:
     case GDK_SOURCE_TRACKPOINT:
-    case GDK_SOURCE_TABLET_PAD:
     default:
       return GDK_SEAT_CAPABILITY_POINTER;
     }
@@ -269,7 +270,7 @@ gdk_seat_default_get_slaves (GdkSeat             *seat,
   if (capabilities & (GDK_SEAT_CAPABILITY_ALL_POINTING))
     devices = append_filtered (devices, priv->slave_pointers, capabilities);
 
-  if (capabilities & GDK_SEAT_CAPABILITY_KEYBOARD)
+  if (capabilities & (GDK_SEAT_CAPABILITY_KEYBOARD | GDK_SEAT_CAPABILITY_TABLET_PAD))
     devices = append_filtered (devices, priv->slave_keyboards, capabilities);
 
   return devices;
@@ -375,7 +376,7 @@ gdk_seat_default_add_slave (GdkSeatDefault *seat,
 
   if (capability & GDK_SEAT_CAPABILITY_ALL_POINTING)
     priv->slave_pointers = g_list_prepend (priv->slave_pointers, g_object_ref (device));
-  else if (capability & GDK_SEAT_CAPABILITY_KEYBOARD)
+  else if (capability & (GDK_SEAT_CAPABILITY_KEYBOARD | GDK_SEAT_CAPABILITY_TABLET_PAD))
     priv->slave_keyboards = g_list_prepend (priv->slave_keyboards, g_object_ref (device));
   else
     {
@@ -415,8 +416,9 @@ gdk_seat_default_remove_slave (GdkSeatDefault *seat,
     {
       priv->slave_keyboards = g_list_remove (priv->slave_keyboards, device);
 
-      if (priv->slave_keyboards == NULL)
-        priv->capabilities &= ~GDK_SEAT_CAPABILITY_KEYBOARD;
+      priv->capabilities &= ~(GDK_SEAT_CAPABILITY_KEYBOARD | GDK_SEAT_CAPABILITY_TABLET_PAD);
+      for (l = priv->slave_keyboards; l; l = l->next)
+        priv->capabilities |= device_get_capability (GDK_DEVICE (l->data));
 
       gdk_seat_device_removed (GDK_SEAT (seat), device);
     }
diff --git a/gdk/wayland/gdkdevice-wayland.c b/gdk/wayland/gdkdevice-wayland.c
index 02f9418..b1d0a00 100644
--- a/gdk/wayland/gdkdevice-wayland.c
+++ b/gdk/wayland/gdkdevice-wayland.c
@@ -4711,6 +4711,17 @@ gdk_wayland_seat_get_slaves (GdkSeat             *seat,
         }
     }
 
+  if (wayland_seat->tablet_pads && (capabilities & GDK_SEAT_CAPABILITY_TABLET_PAD))
+    {
+      GList *l;
+
+      for (l = wayland_seat->tablet_pads; l; l = l->next)
+        {
+          GdkWaylandTabletPadData *data = l->data;
+          slaves = g_list_prepend (slaves, data->device);
+        }
+    }
+
   return slaves;
 }