/** @file scim_helper_module.cpp
 *  @brief Implementation of class HelperModule.
 */

/*
 * Smart Common Input Method
 * 
 * Copyright (c) 2004-2005 James Su <suzhe@tsinghua.org.cn>
 *
 *
 * 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 program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA  02111-1307  USA
 *
 * $Id: scim_helper_module.cpp,v 1.5 2005/01/05 13:41:10 suzhe Exp $
 *
 */

#define Uses_SCIM_HELPER
#define Uses_SCIM_HELPER_MODULE
#define Uses_SCIM_CONFIG_MODULE
#define Uses_C_STDLIB

#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#include "scim_private.h"
#include "scim.h"

namespace scim {

HelperModule::HelperModule (const String &name)
    : m_number_of_helpers (0),
      m_get_helper_info (0),
      m_run_helper (0)
{
    if (name.length ()) load (name);
}

bool
HelperModule::load (const String &name)
{
    try {
        if (!m_module.load (name, "Helper"))
            return false;

        m_number_of_helpers =
            (HelperModuleNumberOfHelpersFunc) m_module.symbol ("scim_helper_module_number_of_helpers");

        m_get_helper_info =
            (HelperModuleGetHelperInfoFunc) m_module.symbol ("scim_helper_module_get_helper_info");

        m_run_helper =
            (HelperModuleRunHelperFunc) m_module.symbol ("scim_helper_module_run_helper");

        if (!m_number_of_helpers || !m_get_helper_info || !m_run_helper) {
            m_module.unload ();
            m_number_of_helpers = 0;
            m_get_helper_info = 0;
            m_run_helper = 0;
            return false;
        }
    } catch (...) {
        m_module.unload ();
        m_number_of_helpers = 0;
        m_get_helper_info = 0;
        m_run_helper = 0;
        return false;
    }

    return true;
}

bool
HelperModule::unload ()
{
    return m_module.unload ();
}

bool
HelperModule::valid () const
{
    return (m_module.valid () &&
            m_number_of_helpers &&
            m_get_helper_info &&
            m_run_helper &&
            m_number_of_helpers () > 0);
}

unsigned int
HelperModule::number_of_helpers () const
{
    if (m_module.valid () && m_number_of_helpers && m_get_helper_info && m_run_helper)
        return m_number_of_helpers ();

    return 0;
}

bool
HelperModule::get_helper_info (unsigned int idx, HelperInfo &info) const
{
    if (m_module.valid () && m_number_of_helpers && m_get_helper_info && m_run_helper)
        return m_get_helper_info (idx, info);

    return false;
}

void
HelperModule::run_helper (const String &uuid, const ConfigPointer &config, const String &display) const
{
    m_run_helper (uuid, config, display);
}

int scim_get_helper_module_list (std::vector <String> &mod_list)
{
    return scim_get_module_list (mod_list, "Helper");
}

} // namespace scim

/*
vi:ts=4:nowrap:ai:expandtab
*/