[gspell/langs.win: 2/5] gspell-language.c: Use Windows API to obtain translated locale info

[Chun-wei Fan <fanchunwei src gnome org>]

commit 081ea218c481853c4ea6845463724459715dd289
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Mon Nov 5 16:15:10 2018 +0800

    gspell-language.c: Use Windows API to obtain translated locale info
    
    By doing so, we do not need to use the iso-codes package to do the same thing
    on Windows, so that we can reduce on the number of dependencies, since Windows
    have APIs to do the needed things for us.

 gspell/gspell-language.c | 114 +++++++++++++++++++++++++++++++++++++----------
 1 file changed, 91 insertions(+), 23 deletions(-)
---
diff --git a/gspell/gspell-language.c b/gspell/gspell-language.c
index 4df9224..2490dde 100644
--- a/gspell/gspell-language.c
+++ b/gspell/gspell-language.c
@@ -66,24 +66,11 @@ G_DEFINE_BOXED_TYPE (GspellLanguage,
                     gspell_language_copy,
                     gspell_language_free)
 
+#ifndef G_OS_WIN32
 static gchar *
 get_iso_codes_prefix (void)
 {
-       gchar *prefix = NULL;
-
-#ifdef G_OS_WIN32
-       HMODULE gspell_dll;
-
-       gspell_dll = _gspell_init_get_dll ();
-       prefix = g_win32_get_package_installation_directory_of_module ((gpointer) gspell_dll);
-#endif
-
-       if (prefix == NULL)
-       {
-               prefix = g_strdup (ISO_CODES_PREFIX);
-       }
-
-       return prefix;
+       return g_strdup (ISO_CODES_PREFIX);
 }
 
 static gchar *
@@ -227,6 +214,7 @@ iso_codes_parse (const GMarkupParser *parser,
                g_clear_error (&error);
        }
 }
+#endif
 
 static void
 spell_language_dict_describe_cb (const gchar * const language_code,
@@ -241,13 +229,84 @@ spell_language_dict_describe_cb (const gchar * const language_code,
        gchar *lowercase;
        gchar **tokens;
 
+#ifdef G_OS_WIN32
+       wchar_t *tokens_w[2] = {NULL, NULL};
+       wchar_t *langname_w = NULL;
+       wchar_t *locale_w = NULL;
+       int len = 0;
+       gboolean failed = FALSE;
+
+       tokens = g_strsplit (language_code, "_", -1);
+
+       g_return_if_fail (tokens != NULL);
+
+       lowercase = g_ascii_strdown (tokens[0], -1);
+       tokens_w[0] = g_utf8_to_utf16 (lowercase, -1, NULL, NULL, NULL);
+       g_free (lowercase);
+
+       if (tokens_w[0] == NULL)
+       {
+               failed = TRUE;
+               goto failed;
+       }
+
+       if (g_strv_length (tokens) >= 2)
+       {
+               gchar *uppercase = g_ascii_strup (tokens[1], -1);
+               tokens_w[1] = g_utf8_to_utf16 (uppercase, -1, NULL, NULL, NULL);
+               g_free (uppercase);
+               len = tokens_w[1] != NULL ? wcslen (tokens_w[1]) : 0;
+       }
+
+       if (len > 0)
+       {
+               locale_w = g_new0 (wchar_t, wcslen(tokens_w[0]) + 1 + len + 1); /* 1 for '-' and the other 1 
for the NUL character */
+               swprintf (locale_w, 85, L"%s-%s", tokens_w[0], tokens_w[1]);
+       }
+       else
+       {
+               locale_w = g_new0 (wchar_t, wcslen(tokens_w[0]) + 1);
+               swprintf (locale_w, 85, L"%s", tokens_w[0]);
+       }
+
+       len = GetLocaleInfoEx (locale_w, LOCALE_SLOCALIZEDDISPLAYNAME, langname_w, 0);
+       if (len == 0)
+       {
+               failed = TRUE;
+               goto failed;
+       }
+
+       langname_w = g_new0 (wchar_t, len);
+
+       GetLocaleInfoEx (locale_w, LOCALE_SLOCALIZEDDISPLAYNAME, langname_w, len);
+
+       if (langname_w == NULL ||
+               GetLocaleInfoEx (locale_w, LOCALE_SLOCALIZEDDISPLAYNAME, langname_w, len) == 0 ||
+        (language_name = g_utf16_to_utf8 (langname_w, -1, NULL, NULL, NULL)) == NULL)
+       {
+               failed = TRUE;
+               goto failed;
+       }
+
+failed:
+       if (failed)
+       {
+               /* Translators: %s is the language ISO code. */
+               language_name = g_strdup_printf (C_("language", "Unknown (%s)"), language_code);
+       }
+
+       g_free (langname_w);
+       g_free (tokens_w[1]);
+       g_free (tokens_w[0]);
+
+#else
        /* Split language code into lowercase tokens. */
        lowercase = g_ascii_strdown (language_code, -1);
        tokens = g_strsplit (lowercase, "_", -1);
        g_free (lowercase);
-
        g_return_if_fail (tokens != NULL);
 
+
        iso_639_name = g_hash_table_lookup (data->iso_639_table, tokens[0]);
 
        if (iso_639_name == NULL)
@@ -283,6 +342,7 @@ spell_language_dict_describe_cb (const gchar * const language_code,
                                                 iso_639_name,
                                                 tokens[1]);
        }
+#endif
 
 exit:
        g_strfreev (tokens);
@@ -332,6 +392,16 @@ gspell_language_get_available (void)
        EnchantBroker *broker;
        DictsData data;
 
+
+       if (initialized)
+       {
+               return available_languages;
+       }
+
+       initialized = TRUE;
+
+
+#ifndef G_OS_WIN32
        GMarkupParser iso_639_parser =
        {
                iso_639_start_element,
@@ -344,13 +414,6 @@ gspell_language_get_available (void)
                NULL, NULL, NULL, NULL
        };
 
-       if (initialized)
-       {
-               return available_languages;
-       }
-
-       initialized = TRUE;
-
        localedir = get_iso_codes_localedir ();
 
        bindtextdomain (ISO_639_DOMAIN, localedir);
@@ -373,6 +436,7 @@ gspell_language_get_available (void)
 
        iso_codes_parse (&iso_639_parser, "iso_639.xml", data.iso_639_table);
        iso_codes_parse (&iso_3166_parser, "iso_3166.xml", data.iso_3166_table);
+#endif
 
        data.tree = g_tree_new_full (tree_compare_func,
                                     NULL,
@@ -380,6 +444,7 @@ gspell_language_get_available (void)
                                     (GDestroyNotify) g_free);
 
        broker = enchant_broker_init ();
+
        enchant_broker_list_dicts (broker,
                                   (EnchantDictDescribeFn) spell_language_dict_describe_cb,
                                   &data);
@@ -389,8 +454,11 @@ gspell_language_get_available (void)
                        (GTraverseFunc) spell_language_traverse_cb,
                        &available_languages);
 
+#ifndef G_OS_WIN32
        g_hash_table_unref (data.iso_639_table);
        g_hash_table_unref (data.iso_3166_table);
+#endif
+
        g_tree_unref (data.tree);
 
        return available_languages;