[gtk/wip/carlosg/input-cleanups: 20/26] gtkwidget: Drop ::grab-notify signal and vfunc

[Carlos Garnacho <carlosg src gnome org>]

commit 994f32704bf9cd69d078e90e1d7db31ea5398537
Author: Carlos Garnacho <carlosg gnome org>
Date:   Wed Jun 24 15:40:05 2020 +0200

    gtkwidget: Drop ::grab-notify signal and vfunc
    
    We don't expect widgets to react directly to these anymore.
    Internally we still reset the controllers.

 gtk/gtkwidget.c | 54 ++++++++++--------------------------------------------
 gtk/gtkwidget.h |  5 -----
 2 files changed, 10 insertions(+), 49 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 0093abb031..af767f318a 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -492,7 +492,6 @@ enum {
   UNREALIZE,
   STATE_FLAGS_CHANGED,
   DIRECTION_CHANGED,
-  GRAB_NOTIFY,
   MNEMONIC_ACTIVATE,
   MOVE_FOCUS,
   KEYNAV_FAILED,
@@ -808,9 +807,16 @@ gtk_widget_real_contains (GtkWidget *widget,
                                           &GRAPHENE_POINT_INIT (x, y));
 }
 
-static void
-gtk_widget_real_grab_notify (GtkWidget *widget,
-                             gboolean   was_grabbed)
+/**
+ * _gtk_widget_grab_notify:
+ * @widget: a #GtkWidget
+ * @was_grabbed: whether a grab is now in effect
+ *
+ * Emits the #GtkWidget::grab-notify signal on @widget.
+ **/
+void
+_gtk_widget_grab_notify (GtkWidget *widget,
+                        gboolean   was_grabbed)
 {
   GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
   int i;
@@ -923,7 +929,6 @@ gtk_widget_class_init (GtkWidgetClass *klass)
   klass->measure = gtk_widget_real_measure;
   klass->state_flags_changed = gtk_widget_real_state_flags_changed;
   klass->direction_changed = gtk_widget_real_direction_changed;
-  klass->grab_notify = gtk_widget_real_grab_notify;
   klass->snapshot = gtk_widget_real_snapshot;
   klass->mnemonic_activate = gtk_widget_real_mnemonic_activate;
   klass->grab_focus = gtk_widget_grab_focus_self;
@@ -1527,31 +1532,6 @@ gtk_widget_class_init (GtkWidgetClass *klass)
                  G_TYPE_NONE, 1,
                  GTK_TYPE_TEXT_DIRECTION);
 
-  /**
-   * GtkWidget::grab-notify:
-   * @widget: the object which received the signal
-   * @was_grabbed: %FALSE if the widget becomes shadowed, %TRUE
-   *               if it becomes unshadowed
-   *
-   * The ::grab-notify signal is emitted when a widget becomes
-   * shadowed by a GTK+ grab (not a pointer or keyboard grab) on
-   * another widget, or when it becomes unshadowed due to a grab
-   * being removed.
-   *
-   * A widget is shadowed by a gtk_grab_add() when the topmost
-   * grab widget in the grab stack of its window group is not
-   * its ancestor.
-   */
-  widget_signals[GRAB_NOTIFY] =
-    g_signal_new (I_("grab-notify"),
-                 G_TYPE_FROM_CLASS (gobject_class),
-                 G_SIGNAL_RUN_FIRST,
-                  G_STRUCT_OFFSET (GtkWidgetClass, grab_notify),
-                 NULL, NULL,
-                 NULL,
-                 G_TYPE_NONE, 1,
-                 G_TYPE_BOOLEAN);
-
   /**
    * GtkWidget::mnemonic-activate:
    * @widget: the object which received the signal.
@@ -4593,20 +4573,6 @@ gtk_widget_activate (GtkWidget *widget)
     return FALSE;
 }
 
-/**
- * _gtk_widget_grab_notify:
- * @widget: a #GtkWidget
- * @was_grabbed: whether a grab is now in effect
- *
- * Emits the #GtkWidget::grab-notify signal on @widget.
- **/
-void
-_gtk_widget_grab_notify (GtkWidget *widget,
-                        gboolean   was_grabbed)
-{
-  g_signal_emit (widget, widget_signals[GRAB_NOTIFY], 0, was_grabbed);
-}
-
 /**
  * gtk_widget_grab_focus:
  * @widget: a #GtkWidget
diff --git a/gtk/gtkwidget.h b/gtk/gtkwidget.h
index 6a1e52f6b7..5a5b92b501 100644
--- a/gtk/gtkwidget.h
+++ b/gtk/gtkwidget.h
@@ -158,9 +158,6 @@ struct _GtkWidget
  *   see gtk_widget_get_state_flags().
  * @direction_changed: Signal emitted when the text direction of a
  *   widget changes.
- * @grab_notify: Signal emitted when a widget becomes shadowed by a
- *   GTK+ grab (not a pointer or keyboard grab) on another widget, or
- *   when it becomes unshadowed due to a grab being removed.
  * @get_request_mode: This allows a widget to tell its parent container whether
  *   it prefers to be allocated in %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or
  *   %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT mode.
@@ -226,8 +223,6 @@ struct _GtkWidgetClass
                                 GtkStateFlags     previous_state_flags);
   void (* direction_changed)   (GtkWidget        *widget,
                                 GtkTextDirection  previous_direction);
-  void (* grab_notify)         (GtkWidget        *widget,
-                                gboolean          was_grabbed);
 
   /* size requests */
   GtkSizeRequestMode (* get_request_mode)               (GtkWidget      *widget);