/*
 * common/enchant.c - Enchant Library Runtime Loading
 *
 * Copyright (C) 2004-2006 Christian Hammond.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include <gtk/gtk.h>
#include "enchant.h"

struct EnchantBroker * (*enchant_broker_init) (void);
void (*enchant_broker_free) (struct EnchantBroker * broker);
void (*enchant_broker_free_dict) (struct EnchantBroker * broker, struct EnchantDict * dict);
void (*enchant_broker_list_dicts) (struct EnchantBroker * broker, EnchantDictDescribeFn fn, void * user_data);
struct EnchantDict * (*enchant_broker_request_dict) (struct EnchantBroker * broker, const char *const tag);

void (*enchant_dict_add_to_personal) (struct EnchantDict * dict, const char *const word, ssize_t len);
void (*enchant_dict_add_to_session) (struct EnchantDict * dict, const char *const word, ssize_t len);
int (*enchant_dict_check) (struct EnchantDict * dict, const char *const word, ssize_t len);
void (*enchant_dict_describe) (struct EnchantDict * dict, EnchantDictDescribeFn fn, void * user_data);
void (*enchant_dict_free_suggestions) (struct EnchantDict * dict, char **suggestions);
void (*enchant_dict_store_replacement) (struct EnchantDict * dict, const char *const mis, ssize_t mis_len, const char *const cor, ssize_t cor_len);
char ** (*enchant_dict_suggest) (struct EnchantDict * dict, const char *const word, ssize_t len, size_t * out_n_suggs);

static gboolean _have_enchant = FALSE;

void
initialize_enchant (void)
{
	GModule *enchant;
	gpointer funcptr;
    gsize i;
    const char * const libnames[] = {
#ifdef G_OS_WIN32
        "libenchant.dll",
#endif
#ifdef G_OS_UNIX
        "libenchant.so.1",
        "libenchant.so.2",
        "libenchant-2.so.2",
#endif
#ifdef __APPLE__
        "libenchant.dylib",
#endif
    };
    
    if (_have_enchant)
    	return;

    for (i = 0; i < G_N_ELEMENTS(libnames); ++i)
    {
        enchant = g_module_open(libnames[i], 0);
        if (enchant)
        {
            g_info ("Loaded %s", libnames[i]);
            _have_enchant = TRUE;
            break;
        }
    }

  if (!_have_enchant)
    return;

#define MODULE_SYMBOL(name, func, alt_name) G_STMT_START { \
    const char *funcname = name; \
    gboolean ret = g_module_symbol(enchant, funcname, &funcptr); \
    if (alt_name) { \
        funcname = alt_name; \
        ret = g_module_symbol(enchant, funcname, &funcptr); \
    } \
    if (ret == FALSE) { \
        g_warning ("Failed to find enchant symbol %s", funcname); \
        _have_enchant = FALSE; \
        return; \
    } \
    (func) = funcptr; \
} G_STMT_END;

	MODULE_SYMBOL("enchant_broker_init", enchant_broker_init, NULL)
	MODULE_SYMBOL("enchant_broker_free", enchant_broker_free, NULL)
	MODULE_SYMBOL("enchant_broker_free_dict", enchant_broker_free_dict, NULL)
	MODULE_SYMBOL("enchant_broker_list_dicts", enchant_broker_list_dicts, NULL)
	MODULE_SYMBOL("enchant_broker_request_dict", enchant_broker_request_dict, NULL)

	MODULE_SYMBOL("enchant_dict_add_to_personal", enchant_dict_add_to_personal, "enchant_dict_add")
	MODULE_SYMBOL("enchant_dict_add_to_session", enchant_dict_add_to_session, NULL)
	MODULE_SYMBOL("enchant_dict_check", enchant_dict_check, NULL)
	MODULE_SYMBOL("enchant_dict_describe", enchant_dict_describe, NULL)
	MODULE_SYMBOL("enchant_dict_free_suggestions", enchant_dict_free_suggestions, "enchant_dict_free_string_list")
	MODULE_SYMBOL("enchant_dict_store_replacement", enchant_dict_store_replacement, NULL)
	MODULE_SYMBOL("enchant_dict_suggest", enchant_dict_suggest, NULL)
}

gboolean
have_enchant (void)
{
	return _have_enchant;
}


static void
get_lang_from_dict_cb (const char * const lang_tag,
		      const char * const provider_name,
		      const char * const provider_desc,
		      const char * const provider_file,
		      void * user_data) {
	gchar **lang = (gchar **)user_data;
	*lang = g_strdup(lang_tag);
}

gchar *
enchant_get_lang_from_dict (struct EnchantDict *dict)
{
	gchar *lang;

	if (!_have_enchant)
		return NULL;

	enchant_dict_describe(dict, get_lang_from_dict_cb, &lang);
	return lang;
}