path: root/addressbook/backend/pas/pas-backend.c

/*
 * Author:
 *   Nat Friedman (nat@helixcode.com)
 *
 * Copyright 2000, Helix Code, Inc.
 */

#include <config.h>
#include <gtk/gtkobject.h>
#include <gtk/gtksignal.h>
#include "pas-backend.h"

#define CLASS(o) PAS_BACKEND_CLASS (GTK_OBJECT (o)->klass)

/* Signal IDs */
enum {
    LAST_CLIENT_GONE,
    LAST_SIGNAL
};

static guint pas_backend_signals[LAST_SIGNAL];


gboolean
pas_backend_construct (PASBackend *backend)
{
    return TRUE;
}

gboolean
pas_backend_load_uri (PASBackend             *backend,
              const char             *uri)
{
    g_return_val_if_fail (backend != NULL, FALSE);
    g_return_val_if_fail (PAS_IS_BACKEND (backend), FALSE);
    g_return_val_if_fail (uri != NULL, FALSE);

    g_assert (CLASS (backend)->load_uri != NULL);

    return (* CLASS (backend)->load_uri) (backend, uri);
}

/**
 * pas_backend_get_uri:
 * @backend: An addressbook backend.
 * 
 * Queries the URI that an addressbook backend is serving.
 * 
 * Return value: URI for the backend.
 **/
const char *
pas_backend_get_uri (PASBackend *backend)
{
    g_return_val_if_fail (backend != NULL, NULL);
    g_return_val_if_fail (PAS_IS_BACKEND (backend), NULL);

    g_assert (CLASS (backend)->get_uri != NULL);

    return (* CLASS (backend)->get_uri) (backend);
}

/**
 * pas_backend_add_client:
 * @backend: An addressbook backend.
 * @listener: Listener for notification to the client.
 *
 * Adds a client to an addressbook backend.
 *
 * Return value: TRUE on success, FALSE on failure to add the client.
 */
gboolean
pas_backend_add_client (PASBackend             *backend,
            Evolution_BookListener  listener)
{
    g_return_val_if_fail (backend != NULL, FALSE);
    g_return_val_if_fail (PAS_IS_BACKEND (backend), FALSE);
    g_return_val_if_fail (listener != CORBA_OBJECT_NIL, FALSE);

    g_assert (CLASS (backend)->add_client != NULL);

    return CLASS (backend)->add_client (backend, listener);
}

void
pas_backend_remove_client (PASBackend *backend,
               PASBook    *book)
{
    g_return_if_fail (backend != NULL);
    g_return_if_fail (PAS_IS_BACKEND (backend));
    g_return_if_fail (book    != NULL);
    g_return_if_fail (PAS_IS_BOOK (book));
    
    g_assert (CLASS (backend)->remove_client != NULL);

    CLASS (backend)->remove_client (backend, book);
}

/**
 * pas_backend_last_client_gone:
 * @backend: An addressbook backend.
 * 
 * Emits the "last_client_gone" signal for the specified backend.  Should
 * only be called from backend implementations if the backend really does
 * not have any more clients.
 **/
void
pas_backend_last_client_gone (PASBackend *backend)
{
    g_return_if_fail (backend != NULL);
    g_return_if_fail (PAS_IS_BACKEND (backend));

    gtk_signal_emit (GTK_OBJECT (backend), pas_backend_signals[LAST_CLIENT_GONE]);  
}

static void
pas_backend_init (PASBackend *backend)
{
}

static void
pas_backend_class_init (PASBackendClass *klass)
{
    GtkObjectClass *object_class;

    object_class = (GtkObjectClass *) klass;

    pas_backend_signals[LAST_CLIENT_GONE] =
        gtk_signal_new ("last_client_gone",
                GTK_RUN_FIRST,
                object_class->type,
                GTK_SIGNAL_OFFSET (PASBackendClass, last_client_gone),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);

    gtk_object_class_add_signals (object_class, pas_backend_signals, LAST_SIGNAL);
}

/**
 * pas_backend_get_type:
 */
GtkType
pas_backend_get_type (void)
{
    static GtkType type = 0;

    if (! type) {
        GtkTypeInfo info = {
            "PASBackend",
            sizeof (PASBackend),
            sizeof (PASBackendClass),
            (GtkClassInitFunc)  pas_backend_class_init,
            (GtkObjectInitFunc) pas_backend_init,
            NULL, /* reserved 1 */
            NULL, /* reserved 2 */
            (GtkClassInitFunc) NULL
        };

        type = gtk_type_unique (gtk_object_get_type (), &info);
    }

    return type;
}