Ticket #380: About colors schemes (reopened ticket)

Original message:

If invalid skin name is set via command line (or config file, or environment variable),
then mc starts silently like -b -a mode. Two proposals, if required skin cannot be found:
 *. Show error message "Cannot find skin"
 *. Load the default.ini skin instead of set -a -c mode.

Fix issue:
Mc now more verbose if skin not found:
{{{
_("Unable to load '%s' skin.\nDefault skin has been loaded")
}}}
or if skin not parse:
{{{
_("Unable to parse '%s' skin.\nDefault skin has been loaded")
}}}
Translators: please, update your translates.

Also, mc will try to load 'default' skin before switch to 'b&w' scheme.

This commit adds ability to usage GError - glib error handling.

Signed-off-by: Slava Zanko <slavazanko@gmail.com>

src/Makefile.am

@@ -15,7 +15,8 @@ AM_CPPFLAGS = -DDATADIR=\""$(pkgdatadir)/"\" -DLOCALEDIR=\""$(localedir)"\" \
 else
 AM_CPPFLAGS = -DDATADIR=\""$(pkgdatadir)/"\" \
 	-DLOCALEDIR=\""$(localedir)"\" \
-	-DSYSCONFDIR=\""$(sysconfdir)/@PACKAGE@/"\"
+	-DSYSCONFDIR=\""$(sysconfdir)/@PACKAGE@/"\" \
+	-DPACKAGE=\""@PACKAGE@\"
 endif
 
 noinst_PROGRAMS = man2hlp

src/global.h

@@ -149,4 +149,7 @@ void refresh_screen (void *);
 #include <assert.h>
 #endif
 
+#define MC_ERROR mc_main_error_quark ()
+GQuark mc_main_error_quark (void);
+
 #endif

src/main.c

@@ -294,6 +294,14 @@ char *mc_home_alt = NULL;
 
 char cmd_buf[512];
 
+/* Define this function for glib-style error handling */
+GQuark
+mc_main_error_quark (void)
+{
+  return g_quark_from_static_string (PACKAGE);
+}
+
+
 /* Save current stat of directories to avoid reloading the panels */
 /* when no modifications have taken place */
 void
@@ -1903,6 +1911,8 @@ main (int argc, char *argv[])
 {
     struct stat s;
     char *mc_dir;
+    GError *error = NULL;
+    gboolean isInitialized;
 
     /* We had LC_CTYPE before, LC_ALL includs LC_TYPE as well */
     setlocale (LC_ALL, "");
@@ -1961,11 +1971,18 @@ main (int argc, char *argv[])
 
     tty_init_colors (mc_args__disable_colors, mc_args__force_colors);
 
-    mc_skin_init();
+    isInitialized = mc_skin_init(&error);
+
     mc_filehighlight = mc_fhl_new (TRUE);
 
     dlg_set_default_colors ();
 
+    if ( ! isInitialized ) {
+        message (D_ERROR, _("Warning"), error->message);
+        g_error_free(error);
+        error = NULL;
+    }
+
     /* create home directory */
     /* do it after the screen library initialization to show the error message */
     mc_dir = concat_dir_and_file (home_dir, MC_BASE);

src/skin/common.c

@@ -98,31 +98,60 @@ mc_skin_reinit (void)
                                                      mc_skin_hash_destroy_value);
 }
 
-/* --------------------------------------------------------------------------------------------- */
-/*** public functions ****************************************************************************/
 /* --------------------------------------------------------------------------------------------- */
 
-void
-mc_skin_init (void)
+static void
+mc_skin_try_to_load_default (void)
 {
-    mc_skin__default.name = mc_skin_get_default_name ();
-    mc_skin__default.colors = g_hash_table_new_full (g_str_hash, g_str_equal,
-                                                     mc_skin_hash_destroy_key,
-                                                     mc_skin_hash_destroy_value);
-
+    mc_skin_reinit ();
+    g_free (mc_skin__default.name);
+    mc_skin__default.name = g_strdup ("default");
     if (!mc_skin_ini_file_load (&mc_skin__default)) {
         mc_skin_reinit ();
         mc_skin_set_hardcoded_skin (&mc_skin__default);
     }
+
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+gboolean
+mc_skin_init (GError ** error)
+{
+
+    mc_skin__default.name = mc_skin_get_default_name ();
+
+    mc_skin__default.colors = g_hash_table_new_full (g_str_hash, g_str_equal,
+                                                     mc_skin_hash_destroy_key,
+                                                     mc_skin_hash_destroy_value);
+
+    gboolean is_good_init = TRUE;
+
+    if (!mc_skin_ini_file_load (&mc_skin__default)) {
+        *error = g_error_new (MC_ERROR, 0,
+                              _("Unable to load '%s' skin.\nDefault skin has been loaded"),
+                              mc_skin__default.name);
+
+        mc_skin_try_to_load_default ();
+        is_good_init = FALSE;
+    }
     mc_skin_colors_old_configure (&mc_skin__default);
 
     if (!mc_skin_ini_file_parse (&mc_skin__default)) {
-        mc_skin_reinit ();
-        mc_skin_set_hardcoded_skin (&mc_skin__default);
+        if (*error == NULL)
+            *error = g_error_new (MC_ERROR, 0,
+                                  _("Unable to parse '%s' skin.\nDefault skin has been loaded"),
+                                  mc_skin__default.name);
+
+        mc_skin_try_to_load_default ();
         mc_skin_colors_old_configure (&mc_skin__default);
         (void) mc_skin_ini_file_parse (&mc_skin__default);
+        is_good_init = FALSE;
     }
     mc_skin_is_init = TRUE;
+    return is_good_init;
 }
 
 /* --------------------------------------------------------------------------------------------- */

src/skin/skin.h

@@ -85,7 +85,7 @@ extern mc_skin_t mc_skin__default;
 
 /*** declarations of public functions ************************************************************/
 
-void mc_skin_init (void);
+gboolean mc_skin_init (GError **);
 void mc_skin_deinit (void);
 
 int mc_skin_color_get (const gchar *, const gchar *);