shave 0.2s off xsettings init with aggressive use of timers and idlers

SVN revision: 74422

src/bin/e_xsettings.c

@@ -51,18 +51,18 @@ static Eina_Bool running = EINA_FALSE;
 static Eio_File *eio_op = NULL;
 static Eina_Bool setting = EINA_FALSE;
 static Eina_Bool reset = EINA_FALSE;
+static Ecore_Idle_Enterer *xsettings_idler = NULL;
 static const char *_setting_icon_theme_name = NULL;
 static const char *_setting_theme_name = NULL;
 static const char *_setting_font_name = NULL;
 static const char *_setting_xft_dpi = NULL;
 static const char *_setting_theme = NULL;
-
 static void _e_xsettings_done_cb(void *data, Eio_File *handler, const Eina_Stat *stat);
 
 static Ecore_X_Atom
 _e_xsettings_atom_screen_get(int screen_num)
 {
-   char buf[32];
+   char buf[64];
    snprintf(buf, sizeof(buf), "_XSETTINGS_S%d", screen_num);
    return ecore_x_atom_get(buf);
 }
@@ -128,9 +128,6 @@ _e_xsettings_activate(Settings_Manager *sm)
                                  ECORE_X_EVENT_MASK_WINDOW_CONFIGURE,
                                  ecore_x_current_time_get(), atom,
                                  sm->selection, 0, 0);
-
-   _e_xsettings_apply(sm);
-
    return 1;
 }
 
@@ -435,6 +432,7 @@ _e_xsettings_done_cb(void *data __UNUSED__, Eio_File *handler __UNUSED__, const
    _setting_theme = NULL;
    eio_op = NULL;
    setting = EINA_FALSE;
+   if (xsettings_idler) return;
    EINA_LIST_FOREACH(managers, l, sm)
      _e_xsettings_apply(sm);
 }
@@ -514,23 +512,64 @@ _e_xsettings_xft_set(void)
 }
 #endif
 
+static Eina_Bool
+_e_xsettings_idler_cb(void *d)
+{
+   static int type;
+   double loop, frame;
+
+   if (d)
+     {
+        /* reset */
+        type = 0;
+        return ECORE_CALLBACK_RENEW;
+     }
+   frame = ecore_animator_frametime_get();
+   loop = ecore_loop_time_get();
+   for (; (type < 4) && (ecore_loop_time_get() - loop < frame); type++)
+     {
+        switch (type)
+          {
+             case 0:
+               _e_xsettings_theme_set();
+               break;
+             case 1:
+               _e_xsettings_icon_theme_set();
+               break;
+             case 2:
+               _e_xsettings_font_set();
+               break;
+             case 3:
+               _e_xsettings_update();
+             default:
+               break;
+          }
+     }
+   if (type < 4) return ECORE_CALLBACK_RENEW;
+   xsettings_idler = NULL;
+   return ECORE_CALLBACK_CANCEL;
+}
+
+static Eina_Bool
+_e_xsettings_idler_start(void *d __UNUSED__)
+{
+   if (xsettings_idler)
+     _e_xsettings_idler_cb((void*)1);
+   else
+     xsettings_idler = ecore_idle_enterer_add(_e_xsettings_idler_cb, NULL);
+   return ECORE_CALLBACK_CANCEL;
+}
+
 static void
 _e_xsettings_start(void)
 {
    Eina_List *l;
    E_Manager *man;
-
    if (running) return;
-
-   _e_xsettings_theme_set();
-   _e_xsettings_icon_theme_set();
-   _e_xsettings_font_set();
-
    EINA_LIST_FOREACH(e_manager_list(), l, man)
      {
         Settings_Manager *sm = E_NEW(Settings_Manager, 1);
         sm->man = man;
-
         if (!_e_xsettings_activate(sm))
           _e_xsettings_retry(sm);
 
@@ -538,8 +577,8 @@ _e_xsettings_start(void)
      }
 
    handlers = eina_list_append(handlers, ecore_event_handler_add(E_EVENT_CONFIG_ICON_THEME,
-                                                                 _cb_icon_theme_change, NULL));
-
+                                                               _cb_icon_theme_change, NULL));
+   ecore_timer_add(2, _e_xsettings_idler_start, NULL);
    running = EINA_TRUE;
 }
 
@@ -577,6 +616,7 @@ _e_xsettings_stop(void)
 EINTERN int
 e_xsettings_init(void)
 {
+
    _atom_manager = ecore_x_atom_get("MANAGER");
    _atom_xsettings = ecore_x_atom_get("_XSETTINGS_SETTINGS");
 
@@ -597,7 +637,9 @@ e_xsettings_shutdown(void)
    _e_xsettings_stop();
    if (eio_op) eio_file_cancel(eio_op);
    eio_op = NULL;
-   setting = EINA_FALSE;
+   if (xsettings_idler) ecore_idle_enterer_del(xsettings_idler);
+   xsettings_idler = NULL;
+   reset = setting = EINA_FALSE;
 
    eina_stringshare_replace(&_setting_icon_theme_name, NULL);
    eina_stringshare_replace(&_setting_theme_name, NULL);
@@ -619,15 +661,10 @@ e_xsettings_config_update(void)
      }
 
    if (!running)
-     {
-        _e_xsettings_start();
-     }
+     _e_xsettings_start();
    else
      {
-        _e_xsettings_theme_set();
-        _e_xsettings_icon_theme_set();
-        _e_xsettings_font_set();
-        _e_xsettings_update();
+        _e_xsettings_idler_start(NULL);
         reset = EINA_TRUE;
      }
 }