[gnome-text-editor] app: add API to install gtksourceview style-schemes

[Christian Hergert <chergert src gnome org>]

commit 22cf781d8b91834335c9488d5b1d1775d8d2f3fe
Author: Christian Hergert <chergert redhat com>
Date:   Wed Feb 2 12:30:08 2022 -0800

    app: add API to install gtksourceview style-schemes
    
    This API can be used to do the work of copying a GFile into the users
    style-scheme directory for GtkSourceView 5.x based applications.

 src/editor-application.c | 119 +++++++++++++++++++++++++++++++++++++++++++++++
 src/editor-application.h |  19 ++++++--
 2 files changed, 133 insertions(+), 5 deletions(-)
---
diff --git a/src/editor-application.c b/src/editor-application.c
index 44e8637..1d1bd01 100644
--- a/src/editor-application.c
+++ b/src/editor-application.c
@@ -639,3 +639,122 @@ _editor_application_get_system_font (EditorApplication *self)
 
   return pango_font_description_from_string (self->system_font_name);
 }
+
+static GFile *
+get_user_style_file (GFile *file)
+{
+  static GFile *style_dir;
+  g_autofree char *basename = NULL;
+
+  g_return_val_if_fail (G_IS_FILE (file), NULL);
+
+  if (style_dir == NULL)
+    style_dir = g_file_new_build_filename (g_get_user_data_dir (), "gtksourceview-5", "styles", NULL);
+
+  basename = g_file_get_basename (file);
+  return g_file_get_child (style_dir, basename);
+}
+
+static void
+editor_application_install_schemes_cb (GObject      *object,
+                                       GAsyncResult *result,
+                                       gpointer      user_data)
+{
+  GFile *file = (GFile *)object;
+  g_autoptr(GError) error = NULL;
+  g_autoptr(GTask) task = user_data;
+  g_autoptr(GFile) dst = NULL;
+  GPtrArray *ar;
+  GFile *src;
+
+  g_assert (G_IS_FILE (file));
+  g_assert (G_IS_ASYNC_RESULT (result));
+  g_assert (G_IS_TASK (task));
+
+  ar = g_task_get_task_data (task);
+
+  g_assert (ar != NULL);
+  g_assert (ar->len > 0);
+  g_assert (G_IS_FILE (g_ptr_array_index (ar, ar->len-1)));
+
+  g_ptr_array_remove_index (ar, ar->len-1);
+
+  if (!g_file_copy_finish (file, result, &error))
+    g_warning ("Failed to copy file: %s", error->message);
+
+  if (ar->len == 0)
+    {
+      g_task_return_boolean (task, TRUE);
+      return;
+    }
+
+  src = g_ptr_array_index (ar, ar->len-1);
+  dst = get_user_style_file (src);
+
+  g_file_copy_async (src, dst,
+                     G_FILE_COPY_OVERWRITE | G_FILE_COPY_BACKUP,
+                     G_PRIORITY_LOW,
+                     g_task_get_cancellable (task),
+                     NULL, NULL,
+                     editor_application_install_schemes_cb,
+                     g_object_ref (task));
+}
+
+void
+editor_application_install_schemes_async (EditorApplication    *self,
+                                          GFile               **files,
+                                          guint                 n_files,
+                                          GCancellable         *cancellable,
+                                          GAsyncReadyCallback   callback,
+                                          gpointer              user_data)
+{
+  g_autoptr(GPtrArray) ar = NULL;
+  g_autoptr(GError) error = NULL;
+  g_autoptr(GTask) task = NULL;
+  g_autoptr(GFile) dst = NULL;
+  g_autoptr(GFile) dir = NULL;
+  GFile *src;
+
+  g_return_if_fail (EDITOR_IS_APPLICATION (self));
+  g_return_if_fail (files != NULL);
+  g_return_if_fail (n_files > 0);
+  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  ar = g_ptr_array_new_with_free_func (g_object_unref);
+  for (guint i = 0; i < n_files; i++)
+    g_ptr_array_add (ar, g_object_ref (files[i]));
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, editor_application_install_schemes_async);
+  g_task_set_task_data (task, g_ptr_array_ref (ar), (GDestroyNotify) g_ptr_array_unref);
+
+  src = g_ptr_array_index (ar, ar->len-1);
+  dst = get_user_style_file (src);
+  dir = g_file_get_parent (dst);
+
+  if (!g_file_query_exists (dir, NULL) &&
+      !g_file_make_directory_with_parents (dir, cancellable, &error))
+    {
+      g_task_return_error (task, g_steal_pointer (&error));
+      return;
+    }
+
+  g_file_copy_async (src, dst,
+                     G_FILE_COPY_OVERWRITE | G_FILE_COPY_BACKUP,
+                     G_PRIORITY_LOW,
+                     cancellable,
+                     NULL, NULL,
+                     editor_application_install_schemes_cb,
+                     g_steal_pointer (&task));
+}
+
+gboolean
+editor_application_install_schemes_finish (EditorApplication  *self,
+                                           GAsyncResult       *result,
+                                           GError            **error)
+{
+  g_return_val_if_fail (EDITOR_IS_APPLICATION (self), FALSE);
+  g_return_val_if_fail (G_IS_TASK (result), FALSE);
+
+  return g_task_propagate_boolean (G_TASK (result), error);
+}
diff --git a/src/editor-application.h b/src/editor-application.h
index af6759b..4cf6a11 100644
--- a/src/editor-application.h
+++ b/src/editor-application.h
@@ -31,10 +31,19 @@ G_BEGIN_DECLS
 
 G_DECLARE_FINAL_TYPE (EditorApplication, editor_application, EDITOR, APPLICATION, AdwApplication)
 
-EditorSession *editor_application_get_session        (EditorApplication *self);
-EditorWindow  *editor_application_get_current_window (EditorApplication *self);
-const char    *editor_application_get_style_scheme   (EditorApplication *self);
-void           editor_application_set_style_scheme   (EditorApplication *self,
-                                                      const char        *style_scheme);
+EditorSession *editor_application_get_session            (EditorApplication    *self);
+EditorWindow  *editor_application_get_current_window     (EditorApplication    *self);
+const char    *editor_application_get_style_scheme       (EditorApplication    *self);
+void           editor_application_set_style_scheme       (EditorApplication    *self,
+                                                          const char           *style_scheme);
+void           editor_application_install_schemes_async  (EditorApplication    *self,
+                                                          GFile               **files,
+                                                          guint                 n_files,
+                                                          GCancellable         *cancellable,
+                                                          GAsyncReadyCallback   callback,
+                                                          gpointer              user_data);
+gboolean       editor_application_install_schemes_finish (EditorApplication     *self,
+                                                          GAsyncResult          *result,
+                                                          GError               **error);
 
 G_END_DECLS