[gedit/wip/loader-saver: 32/48] tab: get candidate encodings when no encoding supplied

[Sébastien Wilmet <swilmet src gnome org>]

commit 08b7bf1852f4f4ee456845954ef27495fc8da9ad
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Jun 28 15:34:05 2014 +0200

    tab: get candidate encodings when no encoding supplied

 gedit/gedit-tab.c |   64 ++++++++++++++++++++++++++++++++++++++++++++++++----
 1 files changed, 59 insertions(+), 5 deletions(-)
---
diff --git a/gedit/gedit-tab.c b/gedit/gedit-tab.c
index 29a482c..a062188 100644
--- a/gedit/gedit-tab.c
+++ b/gedit/gedit-tab.c
@@ -1867,28 +1867,82 @@ end:
        }
 }
 
+static GSList *
+get_candidate_encodings (GeditTab *tab)
+{
+       GeditDocument *doc;
+       GSettings *enc_settings;
+       gchar **enc_strv;
+       gchar *metadata_charset;
+       GSList *encodings;
+
+       enc_settings = g_settings_new ("org.gnome.gedit.preferences.encodings");
+
+       enc_strv = g_settings_get_strv (enc_settings, GEDIT_SETTINGS_ENCODING_AUTO_DETECTED);
+
+       encodings = _gedit_utils_encoding_strv_to_list ((const gchar * const *)enc_strv);
+
+       doc = gedit_tab_get_document (tab);
+       metadata_charset = gedit_document_get_metadata (doc, GEDIT_METADATA_ATTRIBUTE_ENCODING);
+
+       if (metadata_charset != NULL)
+       {
+               const GtkSourceEncoding *metadata_enc;
+
+               metadata_enc = gtk_source_encoding_get_from_charset (metadata_charset);
+
+               if (metadata_enc != NULL)
+               {
+                       encodings = g_slist_prepend (encodings, (gpointer)metadata_enc);
+               }
+
+               g_free (metadata_charset);
+       }
+
+       g_strfreev (enc_strv);
+       g_object_unref (enc_settings);
+
+       return encodings;
+}
+
 static void
 load (GeditTab                *tab,
       const GtkSourceEncoding *encoding,
       gint                     line_pos,
       gint                     column_pos)
 {
+       GSList *candidate_encodings = NULL;
+       GtkSourceFile *file;
+       GFile *location;
+
        g_return_if_fail (GTK_SOURCE_IS_FILE_LOADER (tab->priv->loader));
 
+       file = gtk_source_file_loader_get_file (tab->priv->loader);
+       location = gtk_source_file_loader_get_location (tab->priv->loader);
+
+       /* Sets the location directly, before launching the actual load, so
+        * GeditDocument functions relying on the location work correctly (e.g.
+        * get the metadata encoding with gedit_document_get_metadata(), used in
+        * get_candidate_encodings()).
+        * The previous location is anyway not needed, even if the load fails,
+        * since the buffer contents is first removed.
+        */
+       gtk_source_file_set_location (file, location);
+
        if (encoding != NULL)
        {
                tab->priv->user_requested_encoding = TRUE;
-
-               GSList *list = g_slist_append (NULL, (gpointer) encoding);
-               gtk_source_file_loader_set_candidate_encodings (tab->priv->loader, list);
-               g_slist_free (list);
+               candidate_encodings = g_slist_append (NULL, (gpointer) encoding);
        }
        else
        {
                tab->priv->user_requested_encoding = FALSE;
-               /* TODO */
+               candidate_encodings = get_candidate_encodings (tab);
        }
 
+       gtk_source_file_loader_set_candidate_encodings (tab->priv->loader, candidate_encodings);
+       g_slist_free (candidate_encodings);
+
        tab->priv->tmp_line_pos = line_pos;
        tab->priv->tmp_column_pos = column_pos;