Ticket #343 (automatically detect user's charset)

add show warnind dialog if system and display or source codeset are diferent
add global option skip_check_codeset if set then warnind window not show
    set display_codepage, source_codepage = system locale

src/main.c

@@ -238,6 +238,11 @@ int confirm_view_dir = 0;
 /* This flag indicates if the pull down menus by default drop down */
 int drop_menus = 0;
 
+/* if skip_check_codeset = 1 do not show warning about
+ * system and display codeset is different
+ */
+int skip_check_codeset = 0;
+
 /* The dialog handle for the main program */
 Dlg_head *midnight_dlg;
 
@@ -1449,6 +1454,71 @@ setup_dummy_mc ()
     mc_chdir (d);
 }
 
+static void check_codeset()
+{
+    const char *_system_codepage = NULL;
+    const char *_source_codepage = NULL;
+    const char *_display_codepage = NULL;
+    int profile_changed = 0;
+
+#define CONFY 16
+#define CONFX 54
+
+    if ( !skip_check_codeset ) {
+
+        QuickWidget ecs_widgets [] = {
+        { quick_button, 4, 6, 13, CONFY, N_("&Skip"),
+          0, B_EXIT, 0, 0, NULL , NULL, NULL},
+        { quick_button, 1, 11, 13, CONFY, N_("&Fix it"),
+          0, B_ENTER, 0, 0, NULL , NULL, NULL},
+        { quick_checkbox, 1, 13, 11, CONFY, N_("don't ask again"),
+          11, 0, &skip_check_codeset, NULL, NULL , NULL, NULL},
+        { quick_label, 2, 30, 3, CONFY, N_("Chosen display charset (Settings->Display bits)\n"
+                                           "or source codeset (in mcedit ctrl-t) \n"
+                                           "does not match one set via locale. \n"
+                                           "Set correct codeset manually or press <<Fix it>> \n"
+                                           "to set locale default.\n\n"
+                                           "Or set \'don't ask again\' and press <<Skip>>"),
+          0, 0, 0, 0, NULL , NULL, NULL},
+
+          NULL_QuickWidget
+        };
+
+        QuickDialog ecs =
+        { CONFX, CONFY, -1, -1, N_(" Confirmation "), "[Confirmation]",
+            ecs_widgets, 0
+        };
+
+
+        _system_codepage = str_detect_termencoding();
+        _source_codepage = get_codepage_id (source_codepage);
+        _display_codepage = get_codepage_id (display_codepage);
+
+        if ( (strcmp (_system_codepage, _display_codepage)) ||
+             (strcmp (_system_codepage, _source_codepage)) ) {
+            if (quick_dialog (&ecs) == B_ENTER){
+                display_codepage = get_codepage_index (_system_codepage);
+                cp_display = get_codepage_id (display_codepage);
+                if ( !strcmp (cp_display, _system_codepage)) {
+                    mc_config_set_string(mc_main_config, "Misc", "display_codepage", cp_display);
+                    mc_config_set_string(mc_main_config, "Misc", "source_codepage", cp_display);
+                    display_codepage = get_codepage_index ( cp_display );
+                    utf8_display = str_isutf8 (_system_codepage);
+                    source_codepage = display_codepage;
+                    profile_changed = 1;
+                }
+            } else {
+                if ( skip_check_codeset ) {
+                    mc_config_set_int(mc_main_config, "Midnight-Commander", "skip_check_codeset", 1);
+                    profile_changed = 1;
+                }
+            }
+        }
+        if ( profile_changed )
+            save_configure ();
+    }
+}
+
 static void
 done_mc (void)
 {
@@ -1770,6 +1840,8 @@ do_nc (void)
 
     setup_mc ();
 
+    check_codeset();
+
     setup_panels_and_run_mc ();
 
     /* Program end */

src/main.h

@@ -78,7 +78,7 @@ extern int midnight_shutdown;
 extern char cmd_buf [512];
 extern const char *shell;
 extern int auto_fill_mkdir_name;
-
+extern int skip_check_codeset;
 /* Ugly hack in order to distinguish between left and right panel in menubar */
 extern int is_right;		/* If the selected menu was the right */
 #define MENU_PANEL (is_right ? right_panel : left_panel)

src/setup.c

@@ -194,6 +194,7 @@ static const struct {
     { "xtree_mode", &xtree_mode },
     { "num_history_items_recorded", &num_history_items_recorded },
     { "file_op_compute_totals", &file_op_compute_totals },
+    { "skip_check_codeset", &skip_check_codeset },
 #ifdef USE_VFS
     { "vfs_timeout", &vfs_timeout },
 #ifdef USE_NETCODE