/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Copyright (C) 2004-2007 Imendio AB
*
* 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 2 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors: Martyn Russell <martyn@imendio.com>
* Richard Hult <richard@imendio.com>
*/
#include "config.h"
#include <string.h>
#include <stdlib.h>
#include <glib/gi18n.h>
#ifdef HAVE_ASPELL
#include <aspell.h>
#endif
#include <libempathy/gossip-debug.h>
#include <libempathy/gossip-conf.h>
#include "gossip-spell.h"
#include "gossip-preferences.h"
#define DEBUG_DOMAIN "Spell"
#ifdef HAVE_ASPELL
/* Note: We could use aspell_reset_cache (NULL); periodically if we wanted
* to...
*/
typedef struct {
AspellConfig *spell_config;
AspellCanHaveError *spell_possible_err;
AspellSpeller *spell_checker;
} SpellLanguage;
#define ISO_CODES_DATADIR ISO_CODES_PREFIX "/share/xml/iso-codes"
#define ISO_CODES_LOCALESDIR ISO_CODES_PREFIX "/share/locale"
static GHashTable *iso_code_names = NULL;
static GList *languages = NULL;
static gboolean gossip_conf_notify_inited = FALSE;
static void
spell_iso_codes_parse_start_tag (GMarkupParseContext *ctx,
const gchar *element_name,
const gchar **attr_names,
const gchar **attr_values,
gpointer data,
GError **error)
{
const gchar *ccode_longB, *ccode_longT, *ccode;
const gchar *lang_name;
if (!g_str_equal (element_name, "iso_639_entry") ||
attr_names == NULL || attr_values == NULL) {
return;
}
ccode = NULL;
ccode_longB = NULL;
ccode_longT = NULL;
lang_name = NULL;
while (*attr_names && *attr_values) {
if (g_str_equal (*attr_names, "iso_639_1_code")) {
if (**attr_values) {
ccode = *attr_values;
}
}
else if (g_str_equal (*attr_names, "iso_639_2B_code")) {
if (**attr_values) {
ccode_longB = *attr_values;
}
}
else if (g_str_equal (*attr_names, "iso_639_2T_code")) {
if (**attr_values) {
ccode_longT = *attr_values;
}
}
else if (g_str_equal (*attr_names, "name")) {
lang_name = *attr_values;
}
attr_names++;
attr_values++;
}
if (!lang_name) {
return;
}
if (ccode) {
g_hash_table_insert (iso_code_names,
g_strdup (ccode),
g_strdup (lang_name));
}
if (ccode_longB) {
g_hash_table_insert (iso_code_names,
g_strdup (ccode_longB),
g_strdup (lang_name));
}
if (ccode_longT) {
g_hash_table_insert (iso_code_names,
g_strdup (ccode_longT),
g_strdup (lang_name));
}
}
static void
spell_iso_code_names_init (void)
{
GError *err = NULL;
gchar *buf;
gsize buf_len;
iso_code_names = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, g_free);
bindtextdomain ("iso_639", ISO_CODES_LOCALESDIR);
bind_textdomain_codeset ("iso_639", "UTF-8");
/* FIXME: We should read this in chunks and pass to the parser. */
if (g_file_get_contents (ISO_CODES_DATADIR "/iso_639.xml", &buf, &buf_len, &err)) {
GMarkupParseContext *ctx;
GMarkupParser parser = {
spell_iso_codes_parse_start_tag,
NULL, NULL, NULL, NULL
};
ctx = g_markup_parse_context_new (&parser, 0, NULL, NULL);
if (!g_markup_parse_context_parse (ctx, buf, buf_len, &err)) {
g_warning ("Failed to parse '%s': %s",
ISO_CODES_DATADIR"/iso_639.xml",
err->message);
g_error_free (err);
}
g_markup_parse_context_free (ctx);
g_free (buf);
} else {
g_warning ("Failed to load '%s': %s",
ISO_CODES_DATADIR"/iso_639.xml", err->message);
g_error_free (err);
}
}
static void
spell_notify_languages_cb (GossipConf *conf,
const gchar *key,
gpointer user_data)
{
GList *l;
gossip_debug (DEBUG_DOMAIN, "Resetting languages due to config change");
/* We just reset the languages list. */
for (l = languages; l; l = l->next) {
SpellLanguage *lang;
lang = l->data;
delete_aspell_config (lang->spell_config);
delete_aspell_speller (lang->spell_checker);
g_slice_free (SpellLanguage, lang);
}
g_list_free (languages);
languages = NULL;
}
static void
spell_setup_languages (void)
{
gchar *str;
if (!gossip_conf_notify_inited) {
gossip_conf_notify_add (gossip_conf_get (),
GOSSIP_PREFS_CHAT_SPELL_CHECKER_LANGUAGES,
spell_notify_languages_cb, NULL);
gossip_conf_notify_inited = TRUE;
}
if (languages) {
return;
}
if (gossip_conf_get_string (gossip_conf_get (),
GOSSIP_PREFS_CHAT_SPELL_CHECKER_LANGUAGES,
&str) && str) {
gchar **strv;
gint i;
strv = g_strsplit (str, ",", -1);
i = 0;
while (strv && strv[i]) {
SpellLanguage *lang;
gossip_debug (DEBUG_DOMAIN, "Setting up language:'%s'", strv[i]);
lang = g_slice_new0 (SpellLanguage);
lang->spell_config = new_aspell_config();
aspell_config_replace (lang->spell_config, "encoding", "utf-8");
aspell_config_replace (lang->spell_config, "lang", strv[i++]);
lang->spell_possible_err = new_aspell_speller (lang->spell_config);
if (aspell_error_number (lang->spell_possible_err) == 0) {
lang->spell_checker = to_aspell_speller (lang->spell_possible_err);
languages = g_list_append (languages, lang);
} else {
delete_aspell_config (lang->spell_config);
g_slice_free (SpellLanguage, lang);
}
}
if (strv) {
g_strfreev (strv);
}
g_free (str);
}
}
const char *
gossip_spell_get_language_name (const char *code)
{
const gchar *name;
g_return_val_if_fail (code != NULL, NULL);
if (!iso_code_names) {
spell_iso_code_names_init ();
}
name = g_hash_table_lookup (iso_code_names, code);
if (!name) {
return NULL;
}
return dgettext ("iso_639", name);
}
GList *
gossip_spell_get_language_codes (void)
{
AspellConfig *config;
AspellDictInfoList *dlist;
AspellDictInfoEnumeration *dels;
const AspellDictInfo *entry;
GList *codes = NULL;
config = new_aspell_config ();
dlist = get_aspell_dict_info_list (config);
dels = aspell_dict_info_list_elements (dlist);
while ((entry = aspell_dict_info_enumeration_next (dels)) != 0) {
if (g_list_find_custom (codes, entry->code, (GCompareFunc) strcmp)) {
continue;
}
codes = g_list_append (codes, g_strdup (entry->code));
}
delete_aspell_dict_info_enumeration (dels);
delete_aspell_config (config);
return codes;
}
void
gossip_spell_free_language_codes (GList *codes)
{
g_list_foreach (codes, (GFunc) g_free, NULL);
g_list_free (codes);
}
gboolean
gossip_spell_check (const gchar *word)
{
GList *l;
gint n_langs;
gboolean correct = FALSE;
gint len;
const gchar *p;
gunichar c;
gboolean digit;
g_return_val_if_fail (word != NULL, FALSE);
spell_setup_languages ();
if (!languages) {
gossip_debug (DEBUG_DOMAIN, "No languages to check against");
return TRUE;
}
/* Ignore certain cases like numbers, etc. */
for (p = word, digit = TRUE; *p && digit; p = g_utf8_next_char (p)) {
c = g_utf8_get_char (p);
digit = g_unichar_isdigit (c);
}
if (digit) {
/* We don't spell check digits. */
gossip_debug (DEBUG_DOMAIN, "Not spell checking word:'%s', it is all digits", word);
return TRUE;
}
len = strlen (word);
n_langs = g_list_length (languages);
for (l = languages; l; l = l->next) {
SpellLanguage *lang;
lang = l->data;
correct = aspell_speller_check (lang->spell_checker, word, len);
if (n_langs > 1 && correct) {
break;
}
}
return correct;
}
GList *
gossip_spell_get_suggestions (const gchar *word)
{
GList *l1;
GList *l2 = NULL;
const AspellWordList *suggestions;
AspellStringEnumeration *elements;
const char *next;
gint len;
g_return_val_if_fail (word != NULL, NULL);
spell_setup_languages ();
len = strlen (word);
for (l1 = languages; l1; l1 = l1->next) {
SpellLanguage *lang;
lang = l1->data;
suggestions = aspell_speller_suggest (lang->spell_checker,
word, len);
elements = aspell_word_list_elements (suggestions);
while ((next = aspell_string_enumeration_next (elements))) {
l2 = g_list_append (l2, g_strdup (next));
}
delete_aspell_string_enumeration (elements);
}
return l2;
}
gboolean
gossip_spell_supported (void)
{
if (g_getenv ("GOSSIP_SPELL_DISABLED")) {
gossip_debug (DEBUG_DOMAIN, "GOSSIP_SPELL_DISABLE env variable defined");
return FALSE;
}
return TRUE;
}
#else /* not HAVE_ASPELL */
gboolean
gossip_spell_supported (void)
{
return FALSE;
}
GList *
gossip_spell_get_suggestions (const gchar *word)
{
gossip_debug (DEBUG_DOMAIN, "Support disabled, could not get suggestions");
return NULL;
}
gboolean
gossip_spell_check (const gchar *word)
{
gossip_debug (DEBUG_DOMAIN, "Support disabled, could not check spelling");
return TRUE;
}
const char *
gossip_spell_get_language_name (const char *lang)
{
gossip_debug (DEBUG_DOMAIN, "Support disabled, could not get language name");
return NULL;
}
GList *
gossip_spell_get_language_codes (void)
{
gossip_debug (DEBUG_DOMAIN, "Support disabled, could not get language codes");
return NULL;
}
void
gossip_spell_free_language_codes (GList *codes)
{
}
#endif /* HAVE_ASPELL */
void
gossip_spell_free_suggestions (GList *suggestions)
{
g_list_foreach (suggestions, (GFunc) g_free, NULL);
g_list_free (suggestions);
}
