[clutter] Add more sections to the Clutter configuration file

[Emmanuele Bassi <ebassi src gnome org>]

commit 372b39fd63880955d88fe205b7a23c202938e639
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Tue Oct 11 15:28:47 2011 +0100

    Add more sections to the Clutter configuration file
    
    On top of the existing "Settings" group in the settings.ini file we
    should have two more groups:
    
      Environment   - contains all the configuration possible through
                      environment variables
      Debug         - contains all the possible debug variables

 clutter/clutter-main.c             |  165 ++++++++++++++++++++++++++++++++++--
 clutter/clutter-settings-private.h |    4 +-
 clutter/clutter-settings.c         |   28 +-----
 3 files changed, 165 insertions(+), 32 deletions(-)
---
diff --git a/clutter/clutter-main.c b/clutter/clutter-main.c
index 8992909..28b2857 100644
--- a/clutter/clutter-main.c
+++ b/clutter/clutter-main.c
@@ -216,22 +216,175 @@ clutter_threads_init_default (void)
     clutter_threads_unlock = clutter_threads_impl_unlock;
 }
 
-#define N_CONF_DIRS     2
+#define ENVIRONMENT_GROUP       "Environment"
+#define DEBUG_GROUP             "Debug"
+
+static void
+clutter_config_read_from_key_file (GKeyFile *keyfile)
+{
+  GError *key_error = NULL;
+  gboolean bool_value;
+  gint int_value;
+  const gchar *str_value;
+
+  if (!g_key_file_has_group (keyfile, ENVIRONMENT_GROUP))
+    return;
+
+  bool_value =
+    g_key_file_get_boolean (keyfile, ENVIRONMENT_GROUP,
+                            "ShowFps",
+                            &key_error);
+
+  if (key_error != NULL)
+    g_clear_error (&key_error);
+  else
+    clutter_show_fps = bool_value;
+
+  bool_value =
+    g_key_file_get_boolean (keyfile, ENVIRONMENT_GROUP,
+                            "DisableMipmappedText",
+                            &key_error);
+
+  if (key_error != NULL)
+    g_clear_error (&key_error);
+  else
+    clutter_disable_mipmap_text = bool_value;
+
+  bool_value =
+    g_key_file_get_boolean (keyfile, ENVIRONMENT_GROUP,
+                            "UseFuzzyPicking",
+                            &key_error);
+
+  if (key_error != NULL)
+    g_clear_error (&key_error);
+  else
+    clutter_use_fuzzy_picking = bool_value;
+
+  bool_value =
+    g_key_file_get_boolean (keyfile, ENVIRONMENT_GROUP,
+                            "EnableAccessibility",
+                            &key_error);
+
+  if (key_error != NULL)
+    g_clear_error (&key_error);
+  else
+    clutter_enable_accessibility = bool_value;
+
+  int_value =
+    g_key_file_get_integer (keyfile, ENVIRONMENT_GROUP,
+                            "DefaultFps",
+                            &key_error);
+
+  if (key_error != NULL)
+    g_clear_error (&key_error);
+  else
+    clutter_default_fps = int_value;
+
+  str_value =
+    g_key_file_get_string (keyfile, ENVIRONMENT_GROUP,
+                           "TextDirection",
+                           &key_error);
+
+  if (key_error != NULL)
+    g_clear_error (&key_error);
+  else
+    {
+      if (g_strcmp0 (str_value, "rtl") == 0)
+        clutter_text_direction = CLUTTER_TEXT_DIRECTION_RTL;
+      else
+        clutter_text_direction = CLUTTER_TEXT_DIRECTION_LTR;
+    }
+}
+
+#ifdef CLUTTER_ENABLE_DEBUG
+static void
+clutter_debug_read_from_key_file (GKeyFile *keyfile)
+{
+  GError *key_error = NULL;
+  const gchar *value;
+
+  if (!g_key_file_has_group (keyfile, DEBUG_GROUP))
+    return;
+
+  value = g_key_file_get_value (keyfile, DEBUG_GROUP,
+                                "Debug",
+                                &key_error);
+  if (key_error == NULL)
+    {
+      clutter_debug_flags |=
+        g_parse_debug_string (value,
+                              clutter_debug_keys,
+                              G_N_ELEMENTS (clutter_debug_keys));
+    }
+  else
+    g_clear_error (&key_error);
+
+  value = g_key_file_get_value (keyfile, DEBUG_GROUP,
+                                "PaintDebug",
+                                &key_error);
+  if (key_error == NULL)
+    {
+      clutter_paint_debug_flags |=
+        g_parse_debug_string (value,
+                              clutter_paint_debug_keys,
+                              G_N_ELEMENTS (clutter_paint_debug_keys));
+    }
+  else
+    g_clear_error (&key_error);
+
+  value = g_key_file_get_value (keyfile, DEBUG_GROUP,
+                                "PickDebug",
+                                &key_error);
+  if (key_error == NULL)
+    {
+      clutter_pick_debug_flags |=
+        g_parse_debug_string (value,
+                              clutter_pick_debug_keys,
+                              G_N_ELEMENTS (clutter_pick_debug_keys));
+    }
+  else
+    g_clear_error (&key_error);
+}
+#endif
+
+static void
+clutter_config_read_from_file (const gchar *config_path)
+{
+  ClutterSettings *settings = clutter_settings_get_default ();
+  GKeyFile *key_file = g_key_file_new ();
+  GError *error = NULL;
+
+  g_key_file_load_from_file (key_file, config_path, G_KEY_FILE_NONE, &error);
+  if (error == NULL)
+    {
+      clutter_config_read_from_key_file (key_file);
+#ifdef CLUTTER_ENABLE_DEBUG
+      clutter_debug_read_from_key_file (key_file);
+#endif
+      _clutter_settings_read_from_key_file (settings, key_file);
+    }
+  else
+    {
+      g_warning ("Unable to read configuration settings from '%s': %s",
+                 config_path,
+                 error->message);
+      g_error_free (error);
+    }
+
+  g_key_file_free (key_file);
+}
 
 static void
 clutter_config_read (void)
 {
-  ClutterSettings *settings;
   gchar *config_path;
 
-  settings = clutter_settings_get_default ();
-
   config_path = g_build_filename (CLUTTER_SYSCONFDIR,
                                   "clutter-1.0",
                                   "settings.ini",
                                   NULL);
   if (g_file_test (config_path, G_FILE_TEST_EXISTS))
-    _clutter_settings_read_from_file (settings, config_path);
+    clutter_config_read_from_file (config_path);
 
   g_free (config_path);
 
@@ -240,7 +393,7 @@ clutter_config_read (void)
                                   "settings.ini",
                                   NULL);
   if (g_file_test (config_path, G_FILE_TEST_EXISTS))
-    _clutter_settings_read_from_file (settings, config_path);
+    clutter_config_read_from_file (config_path);
 
   g_free (config_path);
 }
diff --git a/clutter/clutter-settings-private.h b/clutter/clutter-settings-private.h
index 112f542..0e1c463 100644
--- a/clutter/clutter-settings-private.h
+++ b/clutter/clutter-settings-private.h
@@ -8,8 +8,8 @@ G_BEGIN_DECLS
 
 void    _clutter_settings_set_backend           (ClutterSettings *settings,
                                                  ClutterBackend  *backend);
-void    _clutter_settings_read_from_file        (ClutterSettings *settings,
-                                                 const gchar     *file);
+void    _clutter_settings_read_from_key_file    (ClutterSettings *settings,
+                                                 GKeyFile        *key_file);
 
 G_END_DECLS
 
diff --git a/clutter/clutter-settings.c b/clutter/clutter-settings.c
index ffbc605..293f646 100644
--- a/clutter/clutter-settings.c
+++ b/clutter/clutter-settings.c
@@ -690,37 +690,21 @@ _clutter_settings_set_backend (ClutterSettings *settings,
 #define SETTINGS_GROUP  "Settings"
 
 void
-_clutter_settings_read_from_file (ClutterSettings *settings,
-                                  const gchar     *file)
+_clutter_settings_read_from_key_file (ClutterSettings *settings,
+                                      GKeyFile        *keyfile)
 {
   GObjectClass *settings_class;
   GObject *settings_obj;
   GParamSpec **pspecs;
-  GKeyFile *keyfile;
-  GError *error;
   guint n_pspecs, i;
 
-  error = NULL;
-  keyfile = g_key_file_new ();
-  g_key_file_load_from_file (keyfile, file, G_KEY_FILE_NONE, &error);
-  if (error != NULL)
-    {
-      g_critical ("Unable to read configuration from '%s': %s",
-                  file,
-                  error->message);
-      g_error_free (error);
-      goto out;
-    }
-
   if (!g_key_file_has_group (keyfile, SETTINGS_GROUP))
-    goto out;
+    return;
 
   settings_obj = G_OBJECT (settings);
   settings_class = G_OBJECT_GET_CLASS (settings);
   pspecs = g_object_class_list_properties (settings_class, &n_pspecs);
 
-  CLUTTER_NOTE (BACKEND, "Reading settings from '%s'", file);
-
   for (i = 0; i < n_pspecs; i++)
     {
       GParamSpec *pspec = pspecs[i];
@@ -790,9 +774,8 @@ _clutter_settings_read_from_file (ClutterSettings *settings,
           key_error->domain != G_KEY_FILE_ERROR &&
           key_error->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND)
         {
-          g_critical ("Unable to read the value for setting '%s' in '%s': %s",
+          g_critical ("Unable to read the value for setting '%s': %s",
                       p_name,
-                      file,
                       key_error->message);
         }
 
@@ -805,7 +788,4 @@ _clutter_settings_read_from_file (ClutterSettings *settings,
     }
 
   g_free (pspecs);
-
-out:
-  g_key_file_free (keyfile);
 }