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Learning_GTK4_tree/gtk/language-names.c

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#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include <errno.h>
#include <locale.h>
#include <sys/stat.h>
#include <glib.h>
#include <glib/gi18n.h>
#include <glib/gstdio.h>
#include <hb-ot.h>
#include "language-names.h"
#ifdef G_OS_WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#else
#ifndef ISO_CODES_PREFIX
#define ISO_CODES_PREFIX "/usr"
#endif
#define ISO_CODES_DATADIR ISO_CODES_PREFIX "/share/xml/iso-codes"
#define ISO_CODES_LOCALESDIR ISO_CODES_PREFIX "/share/locale"
#endif
static GHashTable *language_map;
#ifdef G_OS_WIN32
/* if we are using native Windows use native Windows API for language names */
static BOOL CALLBACK
get_win32_all_locales_scripts (LPWSTR locale_w, DWORD flags, LPARAM param)
{
wchar_t *langname_w = NULL;
wchar_t locale_abbrev_w[9];
gchar *langname, *locale_abbrev, *locale, *p;
gint i;
const LCTYPE iso639_lctypes[] = { LOCALE_SISO639LANGNAME, LOCALE_SISO639LANGNAME2 };
GHashTable *ht_scripts_langs = (GHashTable *) param;
PangoLanguage *lang;
gint langname_size, locale_abbrev_size;
langname_size = GetLocaleInfoEx (locale_w, LOCALE_SLOCALIZEDDISPLAYNAME, langname_w, 0);
if (langname_size == 0)
return FALSE;
langname_w = g_new0 (wchar_t, langname_size);
if (langname_size == 0)
return FALSE;
GetLocaleInfoEx (locale_w, LOCALE_SLOCALIZEDDISPLAYNAME, langname_w, langname_size);
langname = g_utf16_to_utf8 (langname_w, -1, NULL, NULL, NULL);
locale = g_utf16_to_utf8 (locale_w, -1, NULL, NULL, NULL);
p = strchr (locale, '-');
lang = pango_language_from_string (locale);
if (g_hash_table_lookup (ht_scripts_langs, lang) == NULL)
g_hash_table_insert (ht_scripts_langs, lang, langname);
/*
* Track 3+-letter ISO639-2/3 language codes as well (these have a max length of 9 including terminating NUL)
* ISO639-2: iso639_lctypes[0] = LOCALE_SISO639LANGNAME
* ISO639-3: iso639_lctypes[1] = LOCALE_SISO639LANGNAME2
*/
for (i = 0; i < 2; i++)
{
locale_abbrev_size = GetLocaleInfoEx (locale_w, iso639_lctypes[i], locale_abbrev_w, 0);
if (locale_abbrev_size > 0)
{
GetLocaleInfoEx (locale_w, iso639_lctypes[i], locale_abbrev_w, locale_abbrev_size);
locale_abbrev = g_utf16_to_utf8 (locale_abbrev_w, -1, NULL, NULL, NULL);
lang = pango_language_from_string (locale_abbrev);
if (g_hash_table_lookup (ht_scripts_langs, lang) == NULL)
g_hash_table_insert (ht_scripts_langs, lang, langname);
g_free (locale_abbrev);
}
}
g_free (locale);
g_free (langname_w);
return TRUE;
}
#else /* non-Windows */
static char *
get_first_item_in_semicolon_list (const char *list)
{
char **items;
char *item;
items = g_strsplit (list, "; ", 2);
item = g_strdup (items[0]);
g_strfreev (items);
return item;
}
static char *
capitalize_utf8_string (const char *str)
{
char first[8] = { 0 };
if (!str)
return NULL;
g_unichar_to_utf8 (g_unichar_totitle (g_utf8_get_char (str)), first);
return g_strconcat (first, g_utf8_offset_to_pointer (str, 1), NULL);
}
static char *
get_display_name (const char *language)
{
const char *translated;
char *tmp;
char *name;
translated = dgettext ("iso_639", language);
tmp = get_first_item_in_semicolon_list (translated);
name = capitalize_utf8_string (tmp);
g_free (tmp);
return name;
}
static void
languages_parse_start_tag (GMarkupParseContext *ctx,
const char *element_name,
const char **attr_names,
const char **attr_values,
gpointer user_data,
GError **error)
{
const char *ccode_longB;
const char *ccode_longT;
const char *ccode;
const char *ccode_id;
const char *lang_name;
char *display_name;
const char *long_names[] = {
"Dogri",
"Greek, Modern",
"Interlingua",
"Konkani",
"Tonga",
"Turkish, Ottoman",
};
int i;
if (!(g_str_equal (element_name, "iso_639_entry") ||
g_str_equal (element_name, "iso_639_3_entry")) ||
attr_names == NULL ||
attr_values == NULL)
return;
ccode = NULL;
ccode_longB = NULL;
ccode_longT = NULL;
ccode_id = NULL;
lang_name = NULL;
while (*attr_names && *attr_values)
{
if (g_str_equal (*attr_names, "iso_639_1_code"))
{
if (**attr_values)
{
if (strlen (*attr_values) != 2)
return;
ccode = *attr_values;
}
}
else if (g_str_equal (*attr_names, "iso_639_2B_code"))
{
if (**attr_values)
{
if (strlen (*attr_values) != 3)
return;
ccode_longB = *attr_values;
}
}
else if (g_str_equal (*attr_names, "iso_639_2T_code"))
{
if (**attr_values)
{
if (strlen (*attr_values) != 3)
return;
ccode_longT = *attr_values;
}
}
else if (g_str_equal (*attr_names, "id"))
{
if (**attr_values)
{
if (strlen (*attr_values) != 2 &&
strlen (*attr_values) != 3)
return;
ccode_id = *attr_values;
}
}
else if (g_str_equal (*attr_names, "name"))
{
lang_name = *attr_values;
}
++attr_names;
++attr_values;
}
if (lang_name == NULL)
return;
display_name = get_display_name (lang_name);
/* Fix up some egregious names */
for (i = 0; i < G_N_ELEMENTS (long_names); i++)
{
if (g_str_has_prefix (display_name, long_names[i]))
display_name[strlen (long_names[i])] = '\0';
}
if (ccode != NULL)
g_hash_table_insert (language_map,
pango_language_from_string (ccode),
g_strdup (display_name));
if (ccode_longB != NULL)
g_hash_table_insert (language_map,
pango_language_from_string (ccode_longB),
g_strdup (display_name));
if (ccode_longT != NULL)
g_hash_table_insert (language_map,
pango_language_from_string (ccode_longT),
g_strdup (display_name));
if (ccode_id != NULL)
g_hash_table_insert (language_map,
pango_language_from_string (ccode_id),
g_strdup (display_name));
g_free (display_name);
}
static void
languages_variant_init (const char *variant)
{
gboolean res;
gsize buf_len;
char *buf;
char *filename;
GError *error;
bindtextdomain (variant, ISO_CODES_LOCALESDIR);
bind_textdomain_codeset (variant, "UTF-8");
error = NULL;
filename = g_strconcat (ISO_CODES_DATADIR, "/", variant, ".xml", NULL);
res = g_file_get_contents (filename, &buf, &buf_len, &error);
if (res)
{
GMarkupParseContext *ctx = NULL;
GMarkupParser parser = { languages_parse_start_tag, NULL, NULL, NULL, NULL };
ctx = g_markup_parse_context_new (&parser, 0, NULL, NULL);
res = g_markup_parse_context_parse (ctx, buf, buf_len, &error);
g_free (ctx);
if (!res)
{
g_warning ("Failed to parse '%s': %s\n", filename, error->message);
g_error_free (error);
}
}
else
{
g_warning ("Failed to load '%s': %s\n", filename, error->message);
g_error_free (error);
}
g_free (filename);
g_free (buf);
}
#endif
static void
languages_init (void)
{
if (language_map)
return;
language_map = g_hash_table_new_full (NULL, NULL, NULL, g_free);
#ifdef G_OS_WIN32
g_return_if_fail (EnumSystemLocalesEx (&get_win32_all_locales_scripts, LOCALE_ALL, (LPARAM) language_map, NULL));
#else
languages_variant_init ("iso_639");
languages_variant_init ("iso_639_3");
#endif
}
const char *
get_language_name (PangoLanguage *language)
{
languages_init ();
return (const char *) g_hash_table_lookup (language_map, language);
}
const char *
get_language_name_for_tag (guint32 tag)
{
hb_language_t lang;
const char *s;
lang = hb_ot_tag_to_language (tag);
s = hb_language_to_string (lang);
return get_language_name (pango_language_from_string (s));
}
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