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-rw-r--r--libempathy-gtk/gossip-spell.c457
1 files changed, 457 insertions, 0 deletions
diff --git a/libempathy-gtk/gossip-spell.c b/libempathy-gtk/gossip-spell.c
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+/* -*- 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) {
+ gossip_debug (DEBUG_DOMAIN, "No languages to setup");
+ 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;
+ }
+
+ gossip_debug (DEBUG_DOMAIN, "Support enabled");
+
+ return TRUE;
+}
+
+#else /* not HAVE_ASPELL */
+
+gboolean
+gossip_spell_supported (void)
+{
+ gossip_debug (DEBUG_DOMAIN, "Support disabled");
+
+ 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);
+}
+
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