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parole-module.c

/*
 * * Copyright (C) 2009 Ali <aliov@xfce.org>
 *
 * Licensed under the GNU General Public License Version 2
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <parole/parole-provider-plugin.h>
#include <libxfce4util/libxfce4util.h>

#include "parole-module.h"

static void     parole_provider_module_plugin_init   (ParoleProviderPluginIface      *iface);

static void     parole_provider_module_class_init    (ParoleProviderModuleClass  *klass);
static void parole_provider_module_init        (ParoleProviderModule *module);

GType
parole_provider_module_get_type (void)
{
    static GType type = G_TYPE_INVALID;

    if (G_UNLIKELY (type == G_TYPE_INVALID))
    {
      static const GTypeInfo info =
      {
          sizeof (ParoleProviderModuleClass),
          NULL,
          NULL,
          (GClassInitFunc) parole_provider_module_class_init,
          NULL,
          NULL,
          sizeof (ParoleProviderModule),
          0,
          (GInstanceInitFunc) parole_provider_module_init,
          NULL,
      };

      static const GInterfaceInfo plugin_info =
      {
          (GInterfaceInitFunc) parole_provider_module_plugin_init,
          NULL,
          NULL,
      };

      type = g_type_register_static (G_TYPE_TYPE_MODULE, "ParoleProviderModule", &info, 0);
      g_type_add_interface_static (type, PAROLE_TYPE_PROVIDER_PLUGIN, &plugin_info);
    }

    return type;
}

static gboolean
parole_module_load (GTypeModule *gtype_module)
{
    ParoleProviderModule *module;
    
    module = PAROLE_PROVIDER_MODULE (gtype_module);
    
    module->library = g_module_open (gtype_module->name, G_MODULE_BIND_LOCAL);

    if ( G_UNLIKELY (module->library == NULL) )
    {
      g_critical ("Failed to load plugin : %s", g_module_error ());
      return FALSE;
    }
    
    if ( !g_module_symbol (module->library, "parole_plugin_initialize", (gpointer) &module->initialize) || 
         !g_module_symbol (module->library, "parole_plugin_shutdown", (gpointer) &module->shutdown))
    {
      g_critical ("Plugin %s missing required symbols", gtype_module->name);
      g_module_close (module->library);
      return FALSE;
    }
    
    TRACE ("Loading module %s", gtype_module->name);
    
    module->provider_type = (*module->initialize) (module);
    module->active = TRUE;
    
    return TRUE;
}

static void
parole_module_unload (GTypeModule *gtype_module)
{
    ParoleProviderModule *module;
    
    module = PAROLE_PROVIDER_MODULE (gtype_module);

    TRACE ("Unloading module %s", gtype_module->name);

    (*module->shutdown) ();
    
    g_module_close (module->library);
    
    module->initialize = NULL;
    module->shutdown = NULL;
    module->library = NULL;
    module->provider_type = G_TYPE_INVALID;
    module->active = FALSE;
    
}

static void
parole_provider_module_class_init (ParoleProviderModuleClass *klass)
{
    GTypeModuleClass *gtype_module_class;
    
    gtype_module_class = G_TYPE_MODULE_CLASS (klass);

    gtype_module_class->load   = parole_module_load;
    gtype_module_class->unload = parole_module_unload;
}

static gboolean
parole_provider_module_get_is_configurable (ParoleProviderPlugin *plugin)
{
    ParoleProviderModule *module;
    
    module = PAROLE_PROVIDER_MODULE (plugin);
    
    if ( module->instance )
      return parole_provider_plugin_get_is_configurable (module->instance);
      
    return FALSE;
}

static void
parole_provider_module_configure (ParoleProviderPlugin *plugin, GtkWidget *parent)
{
    ParoleProviderModule *module;
    
    module = PAROLE_PROVIDER_MODULE (plugin);
    
    if ( module->instance )
      parole_provider_plugin_configure (module->instance, parent);
}

static void     
parole_provider_module_plugin_init (ParoleProviderPluginIface *iface)
{
    iface->get_is_configurable = parole_provider_module_get_is_configurable;
    iface->configure = parole_provider_module_configure;
}

static void
parole_provider_module_init (ParoleProviderModule *module)
{
    module->library = NULL;
    module->initialize = NULL;
    module->shutdown = NULL;
    module->active = FALSE;
    module->instance = NULL;
    module->desktop_file = NULL;
    module->provider_type = G_TYPE_INVALID;
    
    module->player = NULL;
}

ParoleProviderModule *
parole_provider_module_new (const gchar *filename, const gchar *desktop_file)
{
    ParoleProviderModule *module = NULL;
    
    module = g_object_new (PAROLE_TYPE_PROVIDER_MODULE, NULL);
    
    g_type_module_set_name (G_TYPE_MODULE (module), filename);
    
    module->desktop_file = g_strdup (desktop_file);
    g_object_set_data_full (G_OBJECT (module), "desktop-file", 
                       module->desktop_file, (GDestroyNotify) g_free);
    
    return module;
}


void parole_provider_module_new_plugin (ParoleProviderModule *module)
{
    TRACE ("start");
    
    g_return_if_fail (PAROLE_IS_PROVIDER_MODULE (module));
    
#ifdef debug
    g_return_if_fail (module->active == TRUE);
    g_return_if_fail (module->instance == NULL);
    g_return_if_fail (module->player == NULL);
#endif

    module->instance = g_object_new (module->provider_type, NULL);
    module->player = parole_plugin_player_new ();
    parole_provider_plugin_set_player (PAROLE_PROVIDER_PLUGIN (module->instance), PAROLE_PROVIDER_PLAYER (module->player));
}

void parole_provider_module_free_plugin (ParoleProviderModule *module)
{
    TRACE ("start");
    
    g_return_if_fail (PAROLE_IS_PROVIDER_MODULE (module));
    
    if ( module->instance )
    {
      g_object_unref (module->instance);
      module->instance = NULL;
    }
    
    if ( module->player )
    {
      g_object_unref (module->player);
      module->player = NULL;
    }
}

gboolean
parole_provider_module_get_is_active (ParoleProviderModule *module)
{
    g_return_val_if_fail (PAROLE_IS_PROVIDER_MODULE (module), FALSE);
    
    return module->active;
}

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