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PIKApp/app/widgets/pikalanguagestore-parser.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikalanguagestore-parser.c
* Copyright (C) 2008, 2009 Sven Neumann <sven@gimp.org>
* Copyright (C) 2013 Jehan <jehan at girinstud.io>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <locale.h>
#include <string.h>
#include <gtk/gtk.h>
#include "libpikabase/pikabase.h"
#include "widgets-types.h"
#include "config/pikaxmlparser.h"
#include "pikalanguagestore.h"
#include "pikalanguagestore-parser.h"
#include "pika-intl.h"
typedef enum
{
ISO_CODES_START,
ISO_CODES_IN_ENTRIES,
ISO_CODES_IN_ENTRY,
ISO_CODES_IN_UNKNOWN
} IsoCodesParserState;
typedef struct
{
IsoCodesParserState state;
IsoCodesParserState last_known_state;
gint unknown_depth;
GHashTable *base_lang_list;
} IsoCodesParser;
static gboolean parse_iso_codes (GHashTable *base_lang_list,
GError **error);
#ifdef HAVE_ISO_CODES
static void iso_codes_parser_init (void);
static void iso_codes_parser_start_element (GMarkupParseContext *context,
const gchar *element_name,
const gchar **attribute_names,
const gchar **attribute_values,
gpointer user_data,
GError **error);
static void iso_codes_parser_end_element (GMarkupParseContext *context,
const gchar *element_name,
gpointer user_data,
GError **error);
static void iso_codes_parser_start_unknown (IsoCodesParser *parser);
static void iso_codes_parser_end_unknown (IsoCodesParser *parser);
#endif /* HAVE_ISO_CODES */
/*
* Language lists that we want to generate only once at program startup:
* @l10n_lang_list: all available localizations self-localized;
* @all_lang_list: all known languages, in the user-selected language.
*/
static GHashTable *l10n_lang_list = NULL;
static GHashTable *all_lang_list = NULL;
/********************\
* Public Functions *
\********************/
/*
* Initialize and run the language listing parser. This call must be
* made only once, at program initialization, but after language_init().
*/
void
pika_language_store_parser_init (void)
{
GHashTable *base_lang_list;
gchar *current_env;
GDir *locales_dir;
GError *error = NULL;
GHashTableIter lang_iter;
gpointer key;
if (l10n_lang_list != NULL)
{
g_warning ("pika_language_store_parser_init() must be run only once.");
return;
}
current_env = g_strdup (g_getenv ("LANGUAGE"));
l10n_lang_list = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) g_free);
all_lang_list = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) g_free);
base_lang_list = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) g_free);
/* Check all locales we have translations for. */
locales_dir = g_dir_open (pika_locale_directory (), 0, NULL);
if (locales_dir)
{
const gchar *locale;
while ((locale = g_dir_read_name (locales_dir)) != NULL)
{
gchar *filename = g_build_filename (pika_locale_directory (),
locale,
"LC_MESSAGES",
GETTEXT_PACKAGE ".mo",
NULL);
if (g_file_test (filename, G_FILE_TEST_EXISTS))
{
gchar *delimiter = NULL;
gchar *base_code = NULL;
delimiter = strchr (locale, '_');
if (delimiter)
base_code = g_strndup (locale, delimiter - locale);
else
base_code = g_strdup (locale);
delimiter = strchr (base_code, '@');
if (delimiter)
{
gchar *temp = base_code;
base_code = g_strndup (base_code, delimiter - base_code);
g_free (temp);
}
/* Save the full language code. */
g_hash_table_insert (l10n_lang_list, g_strdup (locale), NULL);
/* Save the base language code. */
g_hash_table_insert (base_lang_list, base_code, NULL);
}
g_free (filename);
}
g_dir_close (locales_dir);
}
/* Parse ISO-639 file to get full list of language and their names. */
parse_iso_codes (base_lang_list, &error);
/* Generate the localized language names. */
g_hash_table_iter_init (&lang_iter, l10n_lang_list);
while (g_hash_table_iter_next (&lang_iter, &key, NULL))
{
gchar *code = (gchar*) key;
gchar *localized_name = NULL;
gchar *english_name = NULL;
gchar *delimiter = NULL;
gchar *base_code = NULL;
delimiter = strchr (code, '_');
if (delimiter)
base_code = g_strndup (code, delimiter - code);
else
base_code = g_strdup (code);
delimiter = strchr (base_code, '@');
if (delimiter)
{
gchar *temp = base_code;
base_code = g_strndup (base_code, delimiter - base_code);
g_free (temp);
}
english_name = (gchar*) (g_hash_table_lookup (base_lang_list, base_code));
if (english_name)
{
gchar *semicolon;
/* If possible, we want to localize a language in itself.
* If it fails, gettext fallbacks to C (en_US) itself.
*/
g_setenv ("LANGUAGE", code, TRUE);
setlocale (LC_ALL, "");
localized_name = g_strdup (dgettext ("iso_639", english_name));
/* If original and localized names are the same for other than English,
* maybe localization failed. Try now in the main dialect. */
if (g_strcmp0 (english_name, localized_name) == 0 &&
g_strcmp0 (base_code, "en") != 0 &&
g_strcmp0 (code, base_code) != 0)
{
g_free (localized_name);
g_setenv ("LANGUAGE", base_code, TRUE);
setlocale (LC_ALL, "");
localized_name = g_strdup (dgettext ("iso_639", english_name));
}
/* there might be several language names; use the first one */
semicolon = strchr (localized_name, ';');
if (semicolon)
{
gchar *temp = localized_name;
localized_name = g_strndup (localized_name, semicolon - localized_name);
g_free (temp);
}
}
g_hash_table_replace (l10n_lang_list, g_strdup(code),
g_strdup_printf ("%s [%s]",
localized_name ?
localized_name : "???",
code));
g_free (localized_name);
g_free (base_code);
}
/* Add special entries for system locale.
* We want the system locale to be localized in itself. */
g_setenv ("LANGUAGE", setlocale (LC_ALL, NULL), TRUE);
setlocale (LC_ALL, "");
/* g_str_hash() does not accept NULL. I give an empty code instead.
* Other solution would to create a custom hash. */
g_hash_table_insert (l10n_lang_list, g_strdup(""),
g_strdup (_("System Language")));
/* Go back to original localization. */
if (current_env)
{
g_setenv ("LANGUAGE", current_env, TRUE);
g_free (current_env);
}
else
g_unsetenv ("LANGUAGE");
setlocale (LC_ALL, "");
/* Add special entry for C (en_US). */
g_hash_table_insert (l10n_lang_list, g_strdup ("en_US"),
g_strdup ("English [en_US]"));
g_hash_table_destroy (base_lang_list);
}
void
pika_language_store_parser_clean (void)
{
g_hash_table_destroy (l10n_lang_list);
g_hash_table_destroy (all_lang_list);
}
/*
* Returns a Hash table of languages.
* Keys and values are respectively language codes and names from the
* ISO-639 standard code.
*
* If @localization_only is TRUE, it returns only the list of available
* PIKA localizations, and language names are translated in their own
* locale.
* If @localization_only is FALSE, the full list of ISO-639 languages
* is returned, and language names are in the user-set locale.
*
* Do not free the list or elements of the list.
*/
GHashTable *
pika_language_store_parser_get_languages (gboolean localization_only)
{
if (localization_only)
return l10n_lang_list;
else
return all_lang_list;
}
/*****************************\
* Private Parsing Functions *
\*****************************/
/*
* Parse the ISO-639 code list if available on this system, and fill
* @base_lang_list with English names of all needed base codes.
*
* It will also fill the static @all_lang_list.
*/
static gboolean
parse_iso_codes (GHashTable *base_lang_list,
GError **error)
{
gboolean success = TRUE;
#ifdef HAVE_ISO_CODES
static const GMarkupParser markup_parser =
{
iso_codes_parser_start_element,
iso_codes_parser_end_element,
NULL, /* characters */
NULL, /* passthrough */
NULL /* error */
};
PikaXmlParser *xml_parser;
GFile *file;
IsoCodesParser parser = { 0, };
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
iso_codes_parser_init ();
parser.base_lang_list = g_hash_table_ref (base_lang_list);
xml_parser = pika_xml_parser_new (&markup_parser, &parser);
#ifdef ENABLE_RELOCATABLE_RESOURCES
file = pika_installation_directory_file ("share", "xml", "iso-codes",
"iso_639.xml", NULL);
#else
file = g_file_new_for_path (ISO_CODES_LOCATION G_DIR_SEPARATOR_S
"iso_639.xml");
#endif
success = pika_xml_parser_parse_gfile (xml_parser, file, error);
if (error && *error)
{
g_warning ("%s: error parsing '%s': %s\n",
G_STRFUNC, g_file_get_path (file),
(*error)->message);
g_clear_error (error);
}
g_object_unref (file);
pika_xml_parser_free (xml_parser);
g_hash_table_unref (parser.base_lang_list);
#endif /* HAVE_ISO_CODES */
return success;
}
#ifdef HAVE_ISO_CODES
static void
iso_codes_parser_init (void)
{
static gboolean initialized = FALSE;
if (initialized)
return;
#ifdef G_OS_WIN32
/* on Win32, assume iso-codes is installed in the same location as PIKA */
pika_bind_text_domain ("iso_639", pika_locale_directory ());
#else
pika_bind_text_domain ("iso_639", ISO_CODES_LOCALEDIR);
#endif
bind_textdomain_codeset ("iso_639", "UTF-8");
initialized = TRUE;
}
static void
iso_codes_parser_entry (IsoCodesParser *parser,
const gchar **names,
const gchar **values)
{
const gchar *lang = NULL;
const gchar *code = NULL;
while (*names && *values)
{
if (strcmp (*names, "name") == 0)
lang = *values;
else if (strcmp (*names, "iso_639_2B_code") == 0 && code == NULL)
/* 2-letter ISO 639-1 codes have priority.
* But some languages have no 2-letter code. Ex: Asturian (ast).
*/
code = *values;
else if (strcmp (*names, "iso_639_2T_code") == 0 && code == NULL)
code = *values;
else if (strcmp (*names, "iso_639_1_code") == 0)
code = *values;
names++;
values++;
}
if (lang && *lang && code && *code)
{
gchar *semicolon;
gchar *localized_name = g_strdup (dgettext ("iso_639", lang));
/* If the language is in our base table, we save its standard English name. */
if (g_hash_table_contains (parser->base_lang_list, code))
g_hash_table_replace (parser->base_lang_list, g_strdup (code), g_strdup (lang));
/* there might be several language names; use the first one */
semicolon = strchr (localized_name, ';');
if (semicolon)
{
gchar *temp = localized_name;
localized_name = g_strndup (localized_name, semicolon - localized_name);
g_free (temp);
}
/* In any case, we save the name in user-set language for all lang. */
g_hash_table_insert (all_lang_list, g_strdup (code), localized_name);
}
}
static void
iso_codes_parser_start_element (GMarkupParseContext *context,
const gchar *element_name,
const gchar **attribute_names,
const gchar **attribute_values,
gpointer user_data,
GError **error)
{
IsoCodesParser *parser = user_data;
switch (parser->state)
{
case ISO_CODES_START:
if (strcmp (element_name, "iso_639_entries") == 0)
{
parser->state = ISO_CODES_IN_ENTRIES;
break;
}
case ISO_CODES_IN_ENTRIES:
if (strcmp (element_name, "iso_639_entry") == 0)
{
parser->state = ISO_CODES_IN_ENTRY;
iso_codes_parser_entry (parser, attribute_names, attribute_values);
break;
}
case ISO_CODES_IN_ENTRY:
case ISO_CODES_IN_UNKNOWN:
iso_codes_parser_start_unknown (parser);
break;
}
}
static void
iso_codes_parser_end_element (GMarkupParseContext *context,
const gchar *element_name,
gpointer user_data,
GError **error)
{
IsoCodesParser *parser = user_data;
switch (parser->state)
{
case ISO_CODES_START:
g_warning ("%s: shouldn't get here", G_STRLOC);
break;
case ISO_CODES_IN_ENTRIES:
parser->state = ISO_CODES_START;
break;
case ISO_CODES_IN_ENTRY:
parser->state = ISO_CODES_IN_ENTRIES;
break;
case ISO_CODES_IN_UNKNOWN:
iso_codes_parser_end_unknown (parser);
break;
}
}
static void
iso_codes_parser_start_unknown (IsoCodesParser *parser)
{
if (parser->unknown_depth == 0)
parser->last_known_state = parser->state;
parser->state = ISO_CODES_IN_UNKNOWN;
parser->unknown_depth++;
}
static void
iso_codes_parser_end_unknown (IsoCodesParser *parser)
{
pika_assert (parser->unknown_depth > 0 &&
parser->state == ISO_CODES_IN_UNKNOWN);
parser->unknown_depth--;
if (parser->unknown_depth == 0)
parser->state = parser->last_known_state;
}
#endif /* HAVE_ISO_CODES */
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