[gnome-text-editor] document: add helper to swap to admin:// URI

[Christian Hergert <chergert src gnome org>]

commit a248d63c72b742d4efe7e31e07e90e41ce32a62a
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jan 10 16:08:41 2022 -0800

    document: add helper to swap to admin:// URI

 src/editor-document-private.h |  1 +
 src/editor-document.c         | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+)
---
diff --git a/src/editor-document-private.h b/src/editor-document-private.h
index 388d835..9666a20 100644
--- a/src/editor-document-private.h
+++ b/src/editor-document-private.h
@@ -85,5 +85,6 @@ void                      _editor_document_add_spelling            (EditorDocume
 void                      _editor_document_ignore_spelling         (EditorDocument           *self,
                                                                     const char               *word);
 GtkTextTag               *_editor_document_get_spelling_tag        (EditorDocument           *self);
+void                      _editor_document_use_admin               (EditorDocument           *self);
 
 G_END_DECLS
diff --git a/src/editor-document.c b/src/editor-document.c
index 39bc386..7c81be0 100644
--- a/src/editor-document.c
+++ b/src/editor-document.c
@@ -2035,3 +2035,28 @@ _editor_document_get_spelling_tag (EditorDocument *self)
 
   return editor_text_buffer_spell_adapter_get_tag (self->spell_adapter);
 }
+
+void
+_editor_document_use_admin (EditorDocument *self)
+{
+  GFile *file;
+  g_autofree char *uri = NULL;
+  g_autofree char *admin_uri = NULL;
+  g_autoptr(GFile) admin_file = NULL;
+
+  g_return_if_fail (EDITOR_IS_DOCUMENT (self));
+
+  if (!(file = editor_document_get_file (self)))
+    return;
+
+  uri = g_file_get_uri (file);
+  if (!g_str_has_prefix (uri, "file:///"))
+    return;
+
+  admin_uri = g_strdup_printf ("admin://%s", g_file_get_path (file));
+  admin_file = g_file_new_for_uri (admin_uri);
+
+  gtk_source_file_set_location (self->file, admin_file);
+
+  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_FILE]);
+}