[gnome-builder/wip/gtk4-port] libide/gui: add API to remove items from headerbar

[Christian Hergert <chergert src gnome org>]

commit 11229b096bdefcf9918267495cf60b4c36782d7b
Author: Christian Hergert <chergert redhat com>
Date:   Sun May 8 12:43:20 2022 -0700

    libide/gui: add API to remove items from headerbar

 src/libide/gui/ide-header-bar.c | 26 ++++++++++++++++++++++++++
 src/libide/gui/ide-header-bar.h |  3 +++
 2 files changed, 29 insertions(+)
---
diff --git a/src/libide/gui/ide-header-bar.c b/src/libide/gui/ide-header-bar.c
index 10bfbb885..fcab48110 100644
--- a/src/libide/gui/ide-header-bar.c
+++ b/src/libide/gui/ide-header-bar.c
@@ -379,3 +379,29 @@ ide_header_bar_add (IdeHeaderBar         *self,
       gtk_box_insert_child_after (box, widget, sibling);
     }
 }
+
+void
+ide_header_bar_remove (IdeHeaderBar *self,
+                       GtkWidget    *widget)
+{
+  IdeHeaderBarPrivate *priv = ide_header_bar_get_instance_private (self);
+  GtkBox *box;
+
+  g_return_if_fail (IDE_IS_HEADER_BAR (self));
+  g_return_if_fail (GTK_IS_WIDGET (widget));
+  g_return_if_fail (gtk_widget_get_ancestor (widget, IDE_TYPE_HEADER_BAR) == GTK_WIDGET (self));
+
+  box = GTK_BOX (gtk_widget_get_ancestor (widget, GTK_TYPE_BOX));
+
+  if (box == priv->left ||
+      box == priv->right ||
+      box == priv->left_of_center ||
+      box == priv->right_of_center)
+    {
+      gtk_box_remove (box, widget);
+      return;
+    }
+
+  g_warning ("Failed to locate widget of type %s within headerbar",
+             G_OBJECT_TYPE_NAME (widget));
+}
diff --git a/src/libide/gui/ide-header-bar.h b/src/libide/gui/ide-header-bar.h
index 69be5e82d..c459d67d4 100644
--- a/src/libide/gui/ide-header-bar.h
+++ b/src/libide/gui/ide-header-bar.h
@@ -56,6 +56,9 @@ void        ide_header_bar_add         (IdeHeaderBar         *self,
                                         int                   priority,
                                         GtkWidget            *widget);
 IDE_AVAILABLE_IN_ALL
+void        ide_header_bar_remove      (IdeHeaderBar         *self,
+                                        GtkWidget            *widget);
+IDE_AVAILABLE_IN_ALL
 const char *ide_header_bar_get_menu_id (IdeHeaderBar *self);
 IDE_AVAILABLE_IN_ALL
 void        ide_header_bar_set_menu_id (IdeHeaderBar *self,