[gnome-builder/wip/gtk4-port] libide/gtk: add selected row helper

[Christian Hergert <chergert src gnome org>]

commit 2b358c73292788054c5ca5ad6ca9887193f8fcb9
Author: Christian Hergert <chergert redhat com>
Date:   Fri May 13 08:23:03 2022 -0700

    libide/gtk: add selected row helper

 src/libide/gtk/ide-gtk.c | 20 ++++++++++++++++++++
 src/libide/gtk/ide-gtk.h |  3 +++
 2 files changed, 23 insertions(+)
---
diff --git a/src/libide/gtk/ide-gtk.c b/src/libide/gtk/ide-gtk.c
index 5f8447ff6..8649ef1d5 100644
--- a/src/libide/gtk/ide-gtk.c
+++ b/src/libide/gtk/ide-gtk.c
@@ -512,3 +512,23 @@ ide_gtk_list_view_move_previous (GtkListView *view)
       gtk_widget_activate_action (GTK_WIDGET (view), "list.scroll-to-item", "u", pos-1);
     }
 }
+
+gboolean
+ide_gtk_list_view_get_selected_row (GtkListView *view,
+                                    guint       *position)
+{
+  GtkSelectionModel *model;
+  GtkBitset *bitset;
+
+  g_return_val_if_fail (GTK_IS_LIST_VIEW (view), FALSE);
+
+  if (!(model = gtk_list_view_get_model (view)))
+    return FALSE;
+
+  bitset = gtk_selection_model_get_selection (model);
+  if (gtk_bitset_is_empty (bitset))
+    return FALSE;
+
+  *position = gtk_bitset_get_minimum (bitset);
+  return TRUE;
+}
diff --git a/src/libide/gtk/ide-gtk.h b/src/libide/gtk/ide-gtk.h
index bdc6a44c7..f06a5b0f2 100644
--- a/src/libide/gtk/ide-gtk.h
+++ b/src/libide/gtk/ide-gtk.h
@@ -63,5 +63,8 @@ IDE_AVAILABLE_IN_ALL
 void       ide_gtk_list_view_move_next        (GtkListView       *view);
 IDE_AVAILABLE_IN_ALL
 void       ide_gtk_list_view_move_previous    (GtkListView       *view);
+IDE_AVAILABLE_IN_ALL
+gboolean   ide_gtk_list_view_get_selected_row (GtkListView       *view,
+                                               guint             *position);
 
 G_END_DECLS