[gtk+] wayland: Make function to create scroll event more generic

[Carlos Garnacho <carlosg src gnome org>]

commit 3be5aae56a6849254c149a81fd2e85a93c94ea8a
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Jul 20 13:26:00 2017 +0200

    wayland: Make function to create scroll event more generic
    
    Add GdkWaylandPointerData and GdkDevice arguments so it can be
    used across master devices.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=783716

 gdk/wayland/gdkdevice-wayland.c |   29 +++++++++++++++++++----------
 1 files changed, 19 insertions(+), 10 deletions(-)
---
diff --git a/gdk/wayland/gdkdevice-wayland.c b/gdk/wayland/gdkdevice-wayland.c
index 780906b..e7d5a3b 100644
--- a/gdk/wayland/gdkdevice-wayland.c
+++ b/gdk/wayland/gdkdevice-wayland.c
@@ -1300,23 +1300,26 @@ static GdkDevice * get_scroll_device (GdkWaylandSeat              *seat,
                                       enum wl_pointer_axis_source  source);
 
 static GdkEvent *
-create_scroll_event (GdkWaylandSeat *seat,
-                     gboolean        emulated)
+create_scroll_event (GdkWaylandSeat        *seat,
+                     GdkWaylandPointerData *pointer_info,
+                     GdkDevice             *device,
+                     GdkDevice             *source_device,
+                     gboolean               emulated)
 {
   GdkWaylandDisplay *display = GDK_WAYLAND_DISPLAY (seat->display);
   GdkEvent *event;
 
   event = gdk_event_new (GDK_SCROLL);
-  event->scroll.window = g_object_ref (seat->pointer_info.focus);
-  gdk_event_set_device (event, seat->master_pointer);
-  gdk_event_set_source_device (event, get_scroll_device (seat, seat->pointer_info.frame.source));
-  event->scroll.time = seat->pointer_info.time;
-  event->scroll.state = device_get_modifiers (seat->master_pointer);
+  event->scroll.window = g_object_ref (pointer_info->focus);
+  gdk_event_set_device (event, device);
+  gdk_event_set_source_device (event, source_device);
+  event->scroll.time = pointer_info->time;
+  event->scroll.state = device_get_modifiers (device);
   gdk_event_set_screen (event, display->screen);
 
   gdk_event_set_pointer_emulated (event, emulated);
 
-  get_coordinates (seat->master_pointer,
+  get_coordinates (device,
                    &event->scroll.x,
                    &event->scroll.y,
                    &event->scroll.x_root,
@@ -1330,8 +1333,11 @@ flush_discrete_scroll_event (GdkWaylandSeat     *seat,
                              GdkScrollDirection  direction)
 {
   GdkEvent *event;
+  GdkDevice *source;
 
-  event = create_scroll_event (seat, TRUE);
+  source = get_scroll_device (seat, seat->pointer_info.frame.source);
+  event = create_scroll_event (seat, &seat->pointer_info,
+                               seat->master_pointer, source, TRUE);
   event->scroll.direction = direction;
 
   _gdk_wayland_display_deliver_event (seat->display, event);
@@ -1344,8 +1350,11 @@ flush_smooth_scroll_event (GdkWaylandSeat *seat,
                            gboolean        is_stop)
 {
   GdkEvent *event;
+  GdkDevice *source;
 
-  event = create_scroll_event (seat, FALSE);
+  source = get_scroll_device (seat, seat->pointer_info.frame.source);
+  event = create_scroll_event (seat, &seat->pointer_info,
+                               seat->master_pointer, source, FALSE);
   event->scroll.direction = GDK_SCROLL_SMOOTH;
   event->scroll.delta_x = delta_x;
   event->scroll.delta_y = delta_y;