[gedit/wip/merge-encoding-settings: 503/510] Replace 'auto-detected' encoding gsetting by 'candidate-encodings'

[Sébastien Wilmet <swilmet src gnome org>]

commit a93a6d48f811d0a0efad8d984ef0b63c6dcd6179
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Aug 1 16:06:10 2014 +0200

    Replace 'auto-detected' encoding gsetting by 'candidate-encodings'
    
    So that the translation of the default candidate encodings (for each
    locale) is only in GtkSourceView, more precisely in
    gtk_source_encoding_get_default_candidates().
    
    https://bugzilla.gnome.org/show_bug.cgi?id=730622

 data/gedit.convert                  |    1 -
 data/org.gnome.gedit.gschema.xml.in |   23 +++++-------------
 gedit/gedit-settings.h              |    2 +-
 gedit/gedit-tab.c                   |   42 +++++++++++++++++++++++++----------
 4 files changed, 38 insertions(+), 30 deletions(-)
---
diff --git a/data/gedit.convert b/data/gedit.convert
index 811bc91..52ced85 100644
--- a/data/gedit.convert
+++ b/data/gedit.convert
@@ -38,7 +38,6 @@ print-font-header-pango = /apps/gedit-2/preferences/print/fonts/print_font_heade
 print-font-numbers-pango = /apps/gedit-2/preferences/print/fonts/print_font_numbers_pango
 
 [org.gnome.gedit.preferences.encodings]
-auto-detected = /apps/gedit-2/preferences/encodings/auto_detected
 shown-in-menu = /apps/gedit-2/preferences/encodings/shown_in_menu
 
 [org.gnome.gedit.plugins]
diff --git a/data/org.gnome.gedit.gschema.xml.in b/data/org.gnome.gedit.gschema.xml.in
index a01b3ec..312e3e9 100644
--- a/data/org.gnome.gedit.gschema.xml.in
+++ b/data/org.gnome.gedit.gschema.xml.in
@@ -224,22 +224,6 @@
     </key>
   </schema>
   <schema gettext-domain="@GETTEXT_PACKAGE@" id="org.gnome.gedit.preferences.encodings" 
path="/org/gnome/gedit/preferences/encodings/">
-    <key name="auto-detected" type="as">
-      <!-- Translators: This is the sorted list of encodings used by gedit
-           for automatic detection of the file encoding. You may want to customize it adding
-           encodings that are common in your country, for instance the GB18030 encoding
-           for the Chinese translation. You may also want to remove the ISO-8859-15 encoding
-           (covering English and most Western European languages) if you think people
-           in your country will rarely use it.
-           "CURRENT" is a magic value used by gedit and it represents the encoding
-           for the current locale, so please don't translate the "CURRENT" term.
-           Only recognized encodings are used.
-           See http://git.gnome.org/browse/gedit/tree/gedit/gedit-encodings.c#n152 for
-           a list of supported encodings -->
-      <default l10n="messages">['UTF-8', 'CURRENT', 'ISO-8859-15', 'UTF-16']</default>
-      <summary>Automatically Detected Encodings</summary>
-      <description>Sorted list of encodings used by gedit for automatically detecting the encoding of a 
file. "CURRENT" represents the current locale encoding. Only recognized encodings are used.</description>
-    </key>
     <key name="shown-in-menu" type="as">
       <!-- Translators: This is the list of encodings shown by default in the Character Encoding
            menu in open/save file selector. Only recognized encodings are displayed.-->
@@ -247,6 +231,13 @@
       <summary>Encodings shown in menu</summary>
       <description>List of encodings shown in the Character Encoding menu in open/save file selector. Only 
recognized encodings are used.</description>
     </key>
+    <key name="candidate-encodings" type="as">
+      <default>['']</default>
+      <summary>Candidate Encodings</summary>
+      <description>List of candidate encodings shown in the Character Encoding menu in the open/save file 
chooser.
+      "CURRENT" represents the current locale encoding. Only recognized encodings are used.
+      The default value is the empty list, in which case gedit will choose good defaults depending on the 
country and language.</description>
+    </key>
   </schema>
   <schema id="org.gnome.gedit.state" path="/org/gnome/gedit/state/">
     <child name="window" schema="org.gnome.gedit.state.window"/>
diff --git a/gedit/gedit-settings.h b/gedit/gedit-settings.h
index 39ee82e..e882f4e 100644
--- a/gedit/gedit-settings.h
+++ b/gedit/gedit-settings.h
@@ -106,8 +106,8 @@ void                         gedit_settings_set_list                        (GSettings    
 *settings,
 #define GEDIT_SETTINGS_PRINT_FONT_BODY_PANGO           "print-font-body-pango"
 #define GEDIT_SETTINGS_PRINT_FONT_HEADER_PANGO         "print-font-header-pango"
 #define GEDIT_SETTINGS_PRINT_FONT_NUMBERS_PANGO                "print-font-numbers-pango"
-#define GEDIT_SETTINGS_ENCODING_AUTO_DETECTED          "auto-detected"
 #define GEDIT_SETTINGS_ENCODING_SHOWN_IN_MENU          "shown-in-menu"
+#define GEDIT_SETTINGS_CANDIDATE_ENCODINGS             "candidate-encodings"
 #define GEDIT_SETTINGS_ACTIVE_PLUGINS                  "active-plugins"
 #define GEDIT_SETTINGS_ENSURE_TRAILING_NEWLINE         "ensure-trailing-newline"
 
diff --git a/gedit/gedit-tab.c b/gedit/gedit-tab.c
index a0395fd..4d345c7 100644
--- a/gedit/gedit-tab.c
+++ b/gedit/gedit-tab.c
@@ -1938,23 +1938,38 @@ end:
        }
 }
 
+/* The returned list may contain duplicated encodings. Only the first occurrence
+ * of a duplicated encoding should be kept, like it is done by
+ * gtk_source_file_loader_set_candidate_encodings().
+ */
 static GSList *
 get_candidate_encodings (GeditTab *tab)
 {
        GeditDocument *doc;
-       GSettings *enc_settings;
-       gchar **enc_strv;
-       gchar *metadata_charset;
        GtkSourceFile *file;
+       GSettings *settings;
+       gchar **settings_strv;
+       gchar *metadata_charset;
        const GtkSourceEncoding *file_encoding;
-       GSList *encodings;
+       GSList *candidates = NULL;
 
-       enc_settings = g_settings_new ("org.gnome.gedit.preferences.encodings");
+       settings = g_settings_new ("org.gnome.gedit.preferences.encodings");
 
-       enc_strv = g_settings_get_strv (enc_settings, GEDIT_SETTINGS_ENCODING_AUTO_DETECTED);
+       settings_strv = g_settings_get_strv (settings, GEDIT_SETTINGS_CANDIDATE_ENCODINGS);
 
-       encodings = _gedit_utils_encoding_strv_to_list ((const gchar * const *)enc_strv);
+       /* First take the candidate encodings from GSettings. If the gsetting is
+        * empty, take the default candidates of GtkSourceEncoding.
+        */
+       if (settings_strv != NULL && settings_strv[0] != NULL)
+       {
+               candidates = _gedit_utils_encoding_strv_to_list ((const gchar * const *)settings_strv);
+       }
+       else
+       {
+               candidates = gtk_source_encoding_get_default_candidates ();
+       }
 
+       /* Then prepend the encoding stored in the metadata. */
        doc = gedit_tab_get_document (tab);
        metadata_charset = gedit_document_get_metadata (doc, GEDIT_METADATA_ATTRIBUTE_ENCODING);
 
@@ -1966,23 +1981,26 @@ get_candidate_encodings (GeditTab *tab)
 
                if (metadata_enc != NULL)
                {
-                       encodings = g_slist_prepend (encodings, (gpointer)metadata_enc);
+                       candidates = g_slist_prepend (candidates, (gpointer)metadata_enc);
                }
        }
 
+       /* Finally prepend the GtkSourceFile's encoding, if previously set by a
+        * file loader or file saver.
+        */
        file = gedit_document_get_file (doc);
        file_encoding = gtk_source_file_get_encoding (file);
 
        if (file_encoding != NULL)
        {
-               encodings = g_slist_prepend (encodings, (gpointer)file_encoding);
+               candidates = g_slist_prepend (candidates, (gpointer)file_encoding);
        }
 
-       g_object_unref (enc_settings);
-       g_strfreev (enc_strv);
+       g_object_unref (settings);
+       g_strfreev (settings_strv);
        g_free (metadata_charset);
 
-       return encodings;
+       return candidates;
 }
 
 static void