From 7707893f6f6ca1584711a77586b58bbea1553bf1 Mon Sep 17 00:00:00 2001
From: "J.B. Langston" <jb.langston@gmail.com>
Date: Mon, 6 May 2019 22:06:37 -0500
Subject: [PATCH] Automatically set tutorial language from qt locale

---
 src/include/i18n.h        |  1 +
 src/ui/ui-drv/qt/main.cpp |  6 ++++++
 src/ui/ui.c               | 31 +++++++++++--------------------
 3 files changed, 18 insertions(+), 20 deletions(-)

diff --git a/src/include/i18n.h b/src/include/i18n.h
index 09ef6d30..e040c479 100644
--- a/src/include/i18n.h
+++ b/src/include/i18n.h
@@ -12,6 +12,7 @@
 #define bindtextdomain(x, y) (y)
 #define textdomain(x)
 const char *qt_gettext(const char *text);
+const char *qt_locale();
 #define gettext(STRING) qt_gettext(STRING)
 
 #else
diff --git a/src/ui/ui-drv/qt/main.cpp b/src/ui/ui-drv/qt/main.cpp
index 20a78303..04c875e3 100644
--- a/src/ui/ui-drv/qt/main.cpp
+++ b/src/ui/ui-drv/qt/main.cpp
@@ -234,6 +234,12 @@ static struct params params[] = {
 
 extern "C" {
 
+const char
+*qt_locale()
+{
+    return QLocale::system().name().toStdString().c_str();
+}
+
 const char
 *qt_gettext(char *text)
 {
diff --git a/src/ui/ui.c b/src/ui/ui.c
index bf24811e..6cafc51a 100644
--- a/src/ui/ui.c
+++ b/src/ui/ui.c
@@ -1018,9 +1018,7 @@ ui_init (int argc, char **argv)
     int i;
     int width, height;
     char welcome[MAX_WELCOME], language[20];
-#ifdef HAVE_GETTEXT
-    char *locale;
-#endif
+    char *locale = NULL;
 #ifdef DESTICKY
     euid = geteuid ();
     egid = getegid ();
@@ -1030,7 +1028,6 @@ ui_init (int argc, char **argv)
     setegid (getgid ());
 #endif
 
-    strcpy (language, "en");
 #ifdef HAVE_GETTEXT
     /* Setting all locales for XaoS: */
     locale = setlocale (LC_MESSAGES, "");
@@ -1039,7 +1036,7 @@ ui_init (int argc, char **argv)
         printf ("I18n menus will not be available.\n");
     }
 #ifdef _WIN32
-    // x_message("%s",locale);
+    /* Convert from windows language name to ISO 639-1 language code */
     if (locale != NULL) {
         if (strncmp (locale, "Hungarian", 9) == 0)
             strcpy (language, "hu");
@@ -1061,9 +1058,17 @@ ui_init (int argc, char **argv)
             strcpy (language, "pt");
     }
 #else
+    bind_textdomain_codeset ("xaos", "UTF-8");
+#endif
+#endif
+#ifdef QT_GETTEXT
+    locale = qt_locale();
+#endif
     if (locale != NULL && strcmp (locale, "C") != 0) {
         strcpy(language, locale);
-	language[2] = '\0';
+        language[2] = '\0';
+    } else {
+        strcpy (language, "en");
     }
         
 
@@ -1071,17 +1076,7 @@ ui_init (int argc, char **argv)
 
 #ifdef DEBUG
     printf ("Trying to use locale settings for %s.\n", locale);
-#endif
-
-#endif
-#ifdef DEBUG
     printf ("Using catalog file for %s language.\n", language);
-#endif
-    /* Without this some locales (e.g. the Hungarian) replaces "." to ","
-       in numerical format and this will cause an automatic truncation
-       at each parameter at certain places, e.g. drawing a new fractal. */
-    setlocale (LC_NUMERIC, "C");
-#ifdef DEBUG
     printf ("Text domain will be bound to directory %s.\n",
 #endif
             bindtextdomain ("xaos",
@@ -1108,12 +1103,8 @@ ui_init (int argc, char **argv)
 #endif
 #endif
         ;
-#ifndef _WIN32
-    bind_textdomain_codeset ("xaos", "UTF-8");
-#endif
     textdomain ("xaos");
     /* Done setting locales. */
-#endif
     xio_init (argv[0]);
     params_register (global_params);
     params_register (ui_fractal_params);