From f2b3dd318f1165849b45a86251724939b100ef7d Mon Sep 17 00:00:00 2001
From: Carlos Garnacho <carlosg@gnome.org>
Date: Mon, 28 Oct 2019 18:07:31 +0100
Subject: [PATCH] wayland: Check stylus serials on
 meta_wayland_seat_can_popup()

This allows xdg_popup.grab() to work with styli. Without this check
we would bail out and emit xdg_popup.popup_done, leaving stylus users
unable to interact with popup menus, comboboxes, etc...

Closes: https://gitlab.gnome.org/GNOME/mutter/issues/886
---
 src/wayland/meta-wayland-seat.c        | 10 +++++++++-
 src/wayland/meta-wayland-tablet-seat.c | 17 +++++++++++++++++
 src/wayland/meta-wayland-tablet-seat.h |  2 ++
 src/wayland/meta-wayland-tablet-tool.c |  7 +++++++
 src/wayland/meta-wayland-tablet-tool.h |  2 ++
 5 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/src/wayland/meta-wayland-seat.c b/src/wayland/meta-wayland-seat.c
index 91fe376ff..cf41d6eb8 100644
--- a/src/wayland/meta-wayland-seat.c
+++ b/src/wayland/meta-wayland-seat.c
@@ -504,9 +504,17 @@ gboolean
 meta_wayland_seat_can_popup (MetaWaylandSeat *seat,
                              uint32_t         serial)
 {
+  MetaWaylandCompositor *compositor;
+  MetaWaylandTabletSeat *tablet_seat;
+
+  compositor = meta_wayland_compositor_get_default ();
+  tablet_seat =
+    meta_wayland_tablet_manager_ensure_seat (compositor->tablet_manager, seat);
+
   return (meta_wayland_pointer_can_popup (seat->pointer, serial) ||
           meta_wayland_keyboard_can_popup (seat->keyboard, serial) ||
-          meta_wayland_touch_can_popup (seat->touch, serial));
+          meta_wayland_touch_can_popup (seat->touch, serial) ||
+          meta_wayland_tablet_seat_can_popup (tablet_seat, serial));
 }
 
 gboolean
diff --git a/src/wayland/meta-wayland-tablet-seat.c b/src/wayland/meta-wayland-tablet-seat.c
index b4bc4aa58..b1964714a 100644
--- a/src/wayland/meta-wayland-tablet-seat.c
+++ b/src/wayland/meta-wayland-tablet-seat.c
@@ -552,3 +552,20 @@ meta_wayland_tablet_seat_set_pad_focus (MetaWaylandTabletSeat *tablet_seat,
   while (g_hash_table_iter_next (&iter, NULL, (gpointer *) &pad))
     meta_wayland_tablet_pad_set_focus (pad, surface);
 }
+
+gboolean
+meta_wayland_tablet_seat_can_popup (MetaWaylandTabletSeat *tablet_seat,
+                                    uint32_t               serial)
+{
+  MetaWaylandTabletTool *tool;
+  GHashTableIter iter;
+
+  g_hash_table_iter_init (&iter, tablet_seat->tools);
+  while (g_hash_table_iter_next (&iter, NULL, (gpointer *) &tool))
+    {
+      if (meta_wayland_tablet_tool_can_popup (tool, serial))
+        return TRUE;
+    }
+
+  return FALSE;
+}
diff --git a/src/wayland/meta-wayland-tablet-seat.h b/src/wayland/meta-wayland-tablet-seat.h
index c083dec5f..e3be5f264 100644
--- a/src/wayland/meta-wayland-tablet-seat.h
+++ b/src/wayland/meta-wayland-tablet-seat.h
@@ -75,5 +75,7 @@ MetaWaylandTablet     *meta_wayland_tablet_seat_lookup_paired_tablet (MetaWaylan
                                                                       MetaWaylandTabletPad  *pad);
 GList                 *meta_wayland_tablet_seat_lookup_paired_pads   (MetaWaylandTabletSeat *tablet_seat,
                                                                       MetaWaylandTablet     *tablet);
+gboolean               meta_wayland_tablet_seat_can_popup            (MetaWaylandTabletSeat *tablet_seat,
+                                                                      uint32_t               serial);
 
 #endif /* META_WAYLAND_TABLET_SEAT_H */
diff --git a/src/wayland/meta-wayland-tablet-tool.c b/src/wayland/meta-wayland-tablet-tool.c
index c02831d73..065c834bb 100644
--- a/src/wayland/meta-wayland-tablet-tool.c
+++ b/src/wayland/meta-wayland-tablet-tool.c
@@ -1018,3 +1018,10 @@ meta_wayland_tablet_tool_can_grab_surface (MetaWaylandTabletTool *tool,
   return ((tool->down_serial == serial || tool->button_serial == serial) &&
           tablet_tool_can_grab_surface (tool, surface));
 }
+
+gboolean
+meta_wayland_tablet_tool_can_popup (MetaWaylandTabletTool *tool,
+                                    uint32_t               serial)
+{
+  return tool->down_serial == serial || tool->button_serial == serial;
+}
diff --git a/src/wayland/meta-wayland-tablet-tool.h b/src/wayland/meta-wayland-tablet-tool.h
index 71bc86643..315e26bde 100644
--- a/src/wayland/meta-wayland-tablet-tool.h
+++ b/src/wayland/meta-wayland-tablet-tool.h
@@ -85,5 +85,7 @@ void     meta_wayland_tablet_tool_set_cursor_position (MetaWaylandTabletTool  *t
 gboolean meta_wayland_tablet_tool_can_grab_surface (MetaWaylandTabletTool *tool,
                                                     MetaWaylandSurface    *surface,
                                                     uint32_t               serial);
+gboolean meta_wayland_tablet_tool_can_popup        (MetaWaylandTabletTool *tool,
+                                                    uint32_t               serial);
 
 #endif /* META_WAYLAND_TABLET_TOOL_H */
-- 
2.23.0