[gtk: 5/15] gtkeventcontrollerscroll: Refactor scroll begin

[Carlos Garnacho <carlosg src gnome org>]

commit 5cd289dc1d908e79106e20eaa4a85749f2286606
Author: José Expósito <jose exposito89 gmail com>
Date:   Fri Jun 18 17:55:47 2021 +0200

    gtkeventcontrollerscroll: Refactor scroll begin
    
    Move the logic to begin scrolling to its own function to be able to
    reuse it.
    
    Refactor, no functional changes.
    
    Part-of: <!3454>

 gtk/gtkeventcontrollerscroll.c | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)
---
diff --git a/gtk/gtkeventcontrollerscroll.c b/gtk/gtkeventcontrollerscroll.c
index b246bb22db..cfe284cd71 100644
--- a/gtk/gtkeventcontrollerscroll.c
+++ b/gtk/gtkeventcontrollerscroll.c
@@ -235,6 +235,21 @@ gtk_event_controller_scroll_get_property (GObject    *object,
     }
 }
 
+static gboolean
+gtk_event_controller_scroll_begin (GtkEventController *controller)
+{
+  GtkEventControllerScroll *scroll = GTK_EVENT_CONTROLLER_SCROLL (controller);
+
+  if (scroll->active)
+    return FALSE;
+
+  g_signal_emit (controller, signals[SCROLL_BEGIN], 0);
+  scroll_history_reset (scroll);
+  scroll->active = TRUE;
+
+  return TRUE;
+}
+
 static gboolean
 gtk_event_controller_scroll_handle_event (GtkEventController *controller,
                                           GdkEvent           *event,
@@ -258,13 +273,7 @@ gtk_event_controller_scroll_handle_event (GtkEventController *controller,
   if (direction == GDK_SCROLL_SMOOTH)
     {
       gdk_scroll_event_get_deltas (event, &dx, &dy);
-
-      if (!scroll->active)
-        {
-          g_signal_emit (controller, signals[SCROLL_BEGIN], 0);
-          scroll_history_reset (scroll);
-          scroll->active = TRUE;
-        }
+      gtk_event_controller_scroll_begin (controller);
 
       if ((scroll->flags & GTK_EVENT_CONTROLLER_SCROLL_VERTICAL) == 0)
         dy = 0;