path: root/shell/evolution-shell-component.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* evolution-shell-component.c
 *
 * Copyright (C) 2000, 2001 Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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.
 *
 * Author: Ettore Perazzoli
 */

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

#include "evolution-shell-component.h"

#include "e-shell-corba-icon-utils.h"

#include <fcntl.h>

#include <glib.h>
#include <gtk/gtksignal.h>
#include <bonobo/bonobo-object.h>
#include <libgnome/gnome-i18n.h>

#include <gal/util/e-util.h>


#define PING_DELAY 10000


#define PARENT_TYPE BONOBO_X_OBJECT_TYPE

static BonoboXObjectClass *parent_class = NULL;

struct _UserCreatableItemType {
    char *id;
    char *description;
    char *menu_description;
    char menu_shortcut;
    GdkPixbuf *icon;
};
typedef struct _UserCreatableItemType UserCreatableItemType;

struct _EvolutionShellComponentPrivate {
    GList *folder_types;    /* EvolutionShellComponentFolderType */
    GList *external_uri_schemas; /* char * */

    EvolutionShellComponentCreateViewFn create_view_fn;
    EvolutionShellComponentCreateFolderFn create_folder_fn;
    EvolutionShellComponentRemoveFolderFn remove_folder_fn;
    EvolutionShellComponentXferFolderFn xfer_folder_fn;
    EvolutionShellComponentPopulateFolderContextMenuFn populate_folder_context_menu_fn;
    EvolutionShellComponentGetDndSelectionFn get_dnd_selection_fn;

    EvolutionShellClient *owner_client;

    GSList *user_creatable_item_types; /* UserCreatableItemType */

    int ping_timeout_id;

    void *closure;
};

enum {
    OWNER_SET,
    OWNER_UNSET,
    OWNER_DIED,
    DEBUG,
    INTERACTIVE,
    HANDLE_EXTERNAL_URI,
    USER_CREATE_NEW_ITEM,
    SEND_RECEIVE,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };


/* UserCreatableItemType handling.  */

static UserCreatableItemType *
user_creatable_item_type_new (const char *id,
                  const char *description,
                  const char *menu_description,
                  char menu_shortcut,
                  GdkPixbuf *icon)
{
    UserCreatableItemType *type;

    type = g_new (UserCreatableItemType, 1);
    type->id               = g_strdup (id);
    type->description      = g_strdup (description);
    type->menu_description = g_strdup (menu_description);
    type->menu_shortcut    = menu_shortcut;

    if (icon == NULL)
        type->icon = NULL;
    else
        type->icon = gdk_pixbuf_ref (icon);

    return type;
}

static void
user_creatable_item_type_free (UserCreatableItemType *type)
{
    g_free (type->id);
    g_free (type->description);
    g_free (type->menu_description);

    if (type->icon != NULL)
        gdk_pixbuf_unref (type->icon);

    g_free (type);
}


/* Helper functions.  */

/* Notice that, if passed a NULL pointer, this string will construct a
   zero-element NULL-terminated string array instead of returning NULL itself
   (i.e. it will return a pointer to a single g_malloc()ed NULL pointer).  */
static char **
duplicate_null_terminated_string_array (char *array[])
{
    char **new;
    int count;
    int i;

    if (array == NULL) {
        count = 0;
    } else {
        for (count = 0; array[count] != NULL; count++)
            ;
    }

    new = g_new (char *, count + 1);

    for (i = 0; i < count; i++)
        new[i] = g_strdup (array[i]);
    new[count] = NULL;

    return new;
}

/* The following will create a CORBA sequence of strings from the specified
 * NULL-terminated array, without duplicating the strings.  */
static void
fill_corba_sequence_from_null_terminated_string_array (CORBA_sequence_CORBA_string *corba_sequence,
                               char **array)
{
    int count;
    int i;

    g_assert (corba_sequence != NULL);
    g_assert (array != NULL);

    CORBA_sequence_set_release (corba_sequence, TRUE);

    count = 0;
    while (array[count] != NULL)
        count++;

    corba_sequence->_maximum = count;
    corba_sequence->_length = count;
    corba_sequence->_buffer = CORBA_sequence_CORBA_string_allocbuf (count);

    for (i = 0; i < count; i++)
        corba_sequence->_buffer[i] = CORBA_string_dup (array[i]);
}


/* Owner pinging.  */

static gboolean
owner_ping_callback (void *data)
{
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;
    Bonobo_Unknown owner_objref;
    CORBA_Environment ev;
    gboolean alive;

    shell_component = EVOLUTION_SHELL_COMPONENT (data);
    priv = shell_component->priv;

    owner_objref = bonobo_object_corba_objref (BONOBO_OBJECT (priv->owner_client));

    if (owner_objref == CORBA_OBJECT_NIL)
        return FALSE;

    /* We are duplicating the object here, as we might get an ::unsetOwner
       while we invoke the pinging, and this would make the objref invalid
       and thus crash the stubs (cfr. #13802).  */

    CORBA_exception_init (&ev);
    owner_objref = CORBA_Object_duplicate (owner_objref, &ev);

    alive = bonobo_unknown_ping (owner_objref);

    CORBA_Object_release (owner_objref, &ev);
    CORBA_exception_free (&ev);

    if (alive)
        return TRUE;

    /* This is tricky.  During the pinging, we might have gotten an
       ::unsetOwner invocation which has invalidated our owner_client.  In
       this case, no "owner_died" should be emitted.  */
    
    if (priv->owner_client != NULL) {
        g_print ("\t*** The shell has disappeared\n");
        gtk_signal_emit (GTK_OBJECT (shell_component), signals[OWNER_DIED]);
    }

    priv->ping_timeout_id = -1;

    return FALSE;
}

static void
setup_owner_pinging (EvolutionShellComponent *shell_component)
{
    EvolutionShellComponentPrivate *priv;

    priv = shell_component->priv;

    if (priv->ping_timeout_id != -1)
        g_source_remove (priv->ping_timeout_id);

    priv->ping_timeout_id = g_timeout_add (PING_DELAY, owner_ping_callback, shell_component);
}


/* CORBA interface implementation.  */

static GNOME_Evolution_FolderTypeList *
impl__get_supportedTypes (PortableServer_Servant servant,
              CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;
    GNOME_Evolution_FolderTypeList *folder_type_list;
    unsigned int i;
    GList *p;

    bonobo_object = bonobo_object_from_servant (servant);
    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object);
    priv = shell_component->priv;

    folder_type_list = GNOME_Evolution_FolderTypeList__alloc ();
    CORBA_sequence_set_release (folder_type_list, TRUE);
    folder_type_list->_length = g_list_length (priv->folder_types);
    folder_type_list->_maximum = folder_type_list->_length;
    folder_type_list->_buffer = CORBA_sequence_GNOME_Evolution_FolderType_allocbuf (folder_type_list->_maximum);

    for (p = priv->folder_types, i = 0; p != NULL; p = p->next, i++) {
        GNOME_Evolution_FolderType *corba_folder_type;
        EvolutionShellComponentFolderType *folder_type;

        folder_type = (EvolutionShellComponentFolderType *) p->data;

        corba_folder_type = folder_type_list->_buffer + i;
        corba_folder_type->name          = CORBA_string_dup (folder_type->name);
        corba_folder_type->iconName      = CORBA_string_dup (folder_type->icon_name);
        corba_folder_type->displayName   = CORBA_string_dup (folder_type->display_name);
        corba_folder_type->description   = CORBA_string_dup (folder_type->description);
        corba_folder_type->userCreatable = folder_type->user_creatable;

        fill_corba_sequence_from_null_terminated_string_array (& corba_folder_type->acceptedDndTypes,
                                       folder_type->accepted_dnd_types);
        fill_corba_sequence_from_null_terminated_string_array (& corba_folder_type->exportedDndTypes,
                                       folder_type->exported_dnd_types);
    }

    CORBA_sequence_set_release (folder_type_list, TRUE);

    return folder_type_list;
}

static GNOME_Evolution_URISchemaList *
impl__get_externalUriSchemas (PortableServer_Servant servant,
                  CORBA_Environment *ev)
{
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;
    GNOME_Evolution_URISchemaList *uri_schema_list;
    GList *p;
    int i;

    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object_from_servant (servant));
    priv = shell_component->priv;

    uri_schema_list = GNOME_Evolution_URISchemaList__alloc ();

    /* FIXME: We could probably keep this to FALSE and avoid
       CORBA_string_duplicating.  */
    CORBA_sequence_set_release (uri_schema_list, TRUE);

    if (priv->external_uri_schemas == NULL) {
        uri_schema_list->_length = 0;
        uri_schema_list->_maximum = 0;
        uri_schema_list->_buffer = NULL;
        return uri_schema_list;
    }

    uri_schema_list->_length = g_list_length (priv->external_uri_schemas);
    uri_schema_list->_maximum = uri_schema_list->_length;
    uri_schema_list->_buffer = CORBA_sequence_GNOME_Evolution_URISchema_allocbuf (uri_schema_list->_maximum);

    for (p = priv->external_uri_schemas, i = 0; p != NULL; p = p->next, i++) {
        const char *schema;

        schema = (const char *) p->data;
        uri_schema_list->_buffer[i] = CORBA_string_dup (schema);
    }

    return uri_schema_list;
}

static GNOME_Evolution_UserCreatableItemTypeList *
impl__get_userCreatableItemTypes (PortableServer_Servant servant,
                  CORBA_Environment *ev)
{
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;
    GNOME_Evolution_UserCreatableItemTypeList *list;
    GSList *p;
    int i;

    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object_from_servant (servant));
    priv = shell_component->priv;

    list = GNOME_Evolution_UserCreatableItemTypeList__alloc ();
    list->_maximum = g_slist_length (priv->user_creatable_item_types);
    list->_length  = list->_maximum;
    list->_buffer  = CORBA_sequence_GNOME_Evolution_UserCreatableItemType_allocbuf (list->_maximum);

    for (p = priv->user_creatable_item_types, i = 0; p != NULL; p = p->next, i ++) {
        GNOME_Evolution_UserCreatableItemType *corba_type;
        const UserCreatableItemType *type;

        corba_type = list->_buffer + i;
        type = (const UserCreatableItemType *) p->data;

        corba_type->id              = CORBA_string_dup (type->id);
        corba_type->description     = CORBA_string_dup (type->description);
        corba_type->menuDescription = CORBA_string_dup (type->menu_description);
        corba_type->menuShortcut    = type->menu_shortcut;

        e_store_corba_icon_from_pixbuf (type->icon, & corba_type->icon);
    }

    CORBA_sequence_set_release (list, TRUE);

    return list;
}

static void
impl_setOwner (PortableServer_Servant servant,
           const GNOME_Evolution_Shell shell,
           const CORBA_char *evolution_homedir,
           CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;
    GNOME_Evolution_Shell shell_duplicate;

    bonobo_object = bonobo_object_from_servant (servant);
    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object);
    priv = shell_component->priv;

    if (priv->owner_client != NULL) {
        int owner_is_dead;

        owner_is_dead = CORBA_Object_non_existent
            (bonobo_object_corba_objref (BONOBO_OBJECT (priv->owner_client)), ev);
        if (ev->_major != CORBA_NO_EXCEPTION)
            owner_is_dead = TRUE;

        if (! owner_is_dead) {
            CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                         ex_GNOME_Evolution_ShellComponent_AlreadyOwned, NULL);
        } else {
            CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                         ex_GNOME_Evolution_ShellComponent_OldOwnerHasDied, NULL);

            gtk_signal_emit (GTK_OBJECT (shell_component), signals[OWNER_DIED]);
        }

        return;
    }

    shell_duplicate = CORBA_Object_duplicate (shell, ev);

    if (ev->_major == CORBA_NO_EXCEPTION) {
        priv->owner_client = evolution_shell_client_new (shell_duplicate);
        gtk_signal_emit (GTK_OBJECT (shell_component), signals[OWNER_SET], priv->owner_client, evolution_homedir);

        setup_owner_pinging (shell_component);
    }
}

static void
impl_unsetOwner (PortableServer_Servant servant,
         CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;

    bonobo_object = bonobo_object_from_servant (servant);
    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object);
    priv = shell_component->priv;

    if (priv->owner_client == NULL) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_ShellComponent_NotOwned, NULL);
        return;
    }

    gtk_signal_emit (GTK_OBJECT (shell_component), signals[OWNER_UNSET]);
}

static void
impl_debug (PortableServer_Servant servant,
        const CORBA_char *log_path,
        CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    EvolutionShellComponent *shell_component;
    int fd;

    bonobo_object = bonobo_object_from_servant (servant);
    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object);

    fd = open (log_path, O_WRONLY | O_APPEND);
    if (!fd)
        return;

    dup2 (fd, STDOUT_FILENO);
    dup2 (fd, STDERR_FILENO);
    close (fd);

    gtk_signal_emit (GTK_OBJECT (shell_component), signals[DEBUG]);
}

static void
impl_interactive (PortableServer_Servant servant,
          CORBA_boolean interactive,
          CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    EvolutionShellComponent *shell_component;

    bonobo_object = bonobo_object_from_servant (servant);
    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object);

    gtk_signal_emit (GTK_OBJECT (shell_component), signals[INTERACTIVE], interactive);
}

static Bonobo_Control
impl_createView (PortableServer_Servant servant,
         const CORBA_char *physical_uri,
         const CORBA_char *type,
         const CORBA_char *view_info,
         CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;
    EvolutionShellComponentResult result;
    BonoboControl *control;

    bonobo_object = bonobo_object_from_servant (servant);
    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object);
    priv = shell_component->priv;

    result = (* priv->create_view_fn) (shell_component, physical_uri, type,
                       view_info, &control, priv->closure);

    if (result != EVOLUTION_SHELL_COMPONENT_OK) {
        switch (result) {
        case EVOLUTION_SHELL_COMPONENT_UNSUPPORTEDTYPE:
            CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                         ex_GNOME_Evolution_ShellComponent_UnsupportedType,
                         NULL);
            break;
        case EVOLUTION_SHELL_COMPONENT_INTERNALERROR:
            CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                         ex_GNOME_Evolution_ShellComponent_InternalError,
                         NULL);
            break;
        default:
            CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                         ex_GNOME_Evolution_ShellComponent_NotFound,
                         NULL);
        }

        return CORBA_OBJECT_NIL;
    }

    return CORBA_Object_duplicate (bonobo_object_corba_objref (BONOBO_OBJECT (control)), ev);
}

static void
impl_handleExternalURI (PortableServer_Servant servant,
            const CORBA_char *uri,
            CORBA_Environment *ev)
{
    EvolutionShellComponent *shell_component;

    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object_from_servant (servant));

    gtk_signal_emit (GTK_OBJECT (shell_component), signals[HANDLE_EXTERNAL_URI], uri);
}

static void
impl_createFolderAsync (PortableServer_Servant servant,
            const GNOME_Evolution_ShellComponentListener listener,
            const CORBA_char *physical_uri,
            const CORBA_char *type,
            CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;

    bonobo_object = bonobo_object_from_servant (servant);
    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object);
    priv = shell_component->priv;

    if (priv->create_folder_fn == NULL) {
        GNOME_Evolution_ShellComponentListener_notifyResult (listener,
                                     GNOME_Evolution_ShellComponentListener_UNSUPPORTED_OPERATION,
                                     ev);
        return;
    }

    (* priv->create_folder_fn) (shell_component, physical_uri, type, listener, priv->closure);
}

static void
impl_removeFolderAsync (PortableServer_Servant servant,
            const GNOME_Evolution_ShellComponentListener listener,
            const CORBA_char *physical_uri,
            const CORBA_char *type,
            CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;

    bonobo_object = bonobo_object_from_servant (servant);
    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object);
    priv = shell_component->priv;

    if (priv->remove_folder_fn == NULL) {
        GNOME_Evolution_ShellComponentListener_notifyResult (listener,
                                     GNOME_Evolution_ShellComponentListener_UNSUPPORTED_OPERATION,
                                     ev);
        return;
    }

    (* priv->remove_folder_fn) (shell_component, physical_uri, type, listener, priv->closure);
}

static void
impl_xferFolderAsync (PortableServer_Servant servant,
              const GNOME_Evolution_ShellComponentListener listener,
              const CORBA_char *source_physical_uri,
              const CORBA_char *destination_physical_uri,
              const CORBA_char *type,
              const CORBA_boolean remove_source,
              CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;

    bonobo_object = bonobo_object_from_servant (servant);
    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object);
    priv = shell_component->priv;

    if (priv->xfer_folder_fn == NULL) {
        GNOME_Evolution_ShellComponentListener_notifyResult (listener,
                                     GNOME_Evolution_ShellComponentListener_UNSUPPORTED_OPERATION,
                                     ev);
        return;
    }

    (* priv->xfer_folder_fn) (shell_component,
                  source_physical_uri,
                  destination_physical_uri,
                  type,
                  remove_source,
                  listener,
                  priv->closure);
}

static void
impl_populateFolderContextMenu (PortableServer_Servant servant,
                const Bonobo_UIContainer corba_uih,
                const CORBA_char *physical_uri,
                const CORBA_char *type,
                CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;
    BonoboUIComponent *uic;

    bonobo_object = bonobo_object_from_servant (servant);
    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object);
    priv = shell_component->priv;

    if (priv->populate_folder_context_menu_fn == NULL)
        return;

    uic = bonobo_ui_component_new_default ();
    bonobo_ui_component_set_container (uic, corba_uih);
    bonobo_object_release_unref (corba_uih, NULL);

    (* priv->populate_folder_context_menu_fn) (shell_component, uic, physical_uri, type, priv->closure);

    bonobo_object_unref (BONOBO_OBJECT (uic));
}

static void
impl_userCreateNewItem (PortableServer_Servant servant,
            const CORBA_char *id,
            const CORBA_char *parent_physical_uri,
            const CORBA_char *parent_type,
            CORBA_Environment *ev)
{
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;

    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object_from_servant (servant));
    priv = shell_component->priv;

    /* FIXME: Check that the type is good.  */

    gtk_signal_emit (GTK_OBJECT (shell_component), signals[USER_CREATE_NEW_ITEM], id, parent_physical_uri, parent_type);
}

static void
impl_sendReceive (PortableServer_Servant servant,
          const CORBA_boolean show_dialog,
          CORBA_Environment *ev)
{
    EvolutionShellComponent *shell_component;

    shell_component = EVOLUTION_SHELL_COMPONENT (bonobo_object_from_servant (servant));
    gtk_signal_emit (GTK_OBJECT (shell_component), signals[SEND_RECEIVE], show_dialog);
}


/* GtkObject methods.  */

static void
destroy (GtkObject *object)
{
    EvolutionShellComponent *shell_component;
    EvolutionShellComponentPrivate *priv;
    CORBA_Environment ev;
    GSList *sp;
    GList *p;

    shell_component = EVOLUTION_SHELL_COMPONENT (object);

    priv = shell_component->priv;

    if (priv->ping_timeout_id != -1) {
        g_source_remove (priv->ping_timeout_id);
        priv->ping_timeout_id = -1;
    }

    CORBA_exception_init (&ev);

    if (priv->owner_client != NULL) {
        BonoboObject *owner_client_object;

        owner_client_object = BONOBO_OBJECT (priv->owner_client);
        priv->owner_client = NULL;
        bonobo_object_unref (BONOBO_OBJECT (owner_client_object));
    }

    CORBA_exception_free (&ev);

    for (p = priv->folder_types; p != NULL; p = p->next) {
        EvolutionShellComponentFolderType *folder_type;

        folder_type = (EvolutionShellComponentFolderType *) p->data;

        g_free (folder_type->name);
        g_free (folder_type->icon_name);
        g_strfreev (folder_type->exported_dnd_types);
        g_strfreev (folder_type->accepted_dnd_types);

        g_free (folder_type);
    }
    g_list_free (priv->folder_types);

    e_free_string_list (priv->external_uri_schemas);

    for (sp = priv->user_creatable_item_types; sp != NULL; sp = sp->next)
        user_creatable_item_type_free ((UserCreatableItemType *) sp->data);
    g_slist_free (priv->user_creatable_item_types);

    g_free (priv);

    (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}


/* EvolutionShellComponent methods.  */

static void
impl_owner_unset (EvolutionShellComponent *shell_component)
{
    EvolutionShellComponentPrivate *priv;
    BonoboObject *owner_client_object;

    priv = shell_component->priv;

    if (priv->ping_timeout_id != -1) {
        g_source_remove (priv->ping_timeout_id);
        priv->ping_timeout_id = -1;
    }

    owner_client_object = BONOBO_OBJECT (priv->owner_client);
    priv->owner_client = NULL;
    bonobo_object_unref (BONOBO_OBJECT (owner_client_object));
}

static void
impl_owner_died (EvolutionShellComponent *shell_component)
{
    EvolutionShellComponentPrivate *priv;
    BonoboObject *owner_client_object;

    priv = shell_component->priv;

    owner_client_object = BONOBO_OBJECT (priv->owner_client);
    priv->owner_client = NULL;
    bonobo_object_unref (BONOBO_OBJECT (owner_client_object));

    /* The default implementation for ::owner_died emits ::owner_unset, so
       that we make the behavior for old components kind of correct without
       even if they don't handle the new ::owner_died signal correctly
       yet.  */

    gtk_signal_emit (GTK_OBJECT (shell_component), signals[OWNER_UNSET]);
}


/* Initialization.  */

static void
class_init (EvolutionShellComponentClass *klass)
{
    EvolutionShellComponentClass *shell_component_class;
    GtkObjectClass *object_class;
    POA_GNOME_Evolution_ShellComponent__epv *epv = &klass->epv;

    object_class = GTK_OBJECT_CLASS (klass);
    object_class->destroy = destroy;

    signals[OWNER_SET]
        = gtk_signal_new ("owner_set",
                  GTK_RUN_FIRST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EvolutionShellComponentClass, owner_set),
                  gtk_marshal_NONE__POINTER_POINTER,
                  GTK_TYPE_NONE, 2,
                  GTK_TYPE_POINTER, GTK_TYPE_POINTER);

    signals[OWNER_DIED]
        = gtk_signal_new ("owner_died",
                  GTK_RUN_FIRST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EvolutionShellComponentClass, owner_died),
                  gtk_marshal_NONE__NONE,
                  GTK_TYPE_NONE, 0);

    signals[OWNER_UNSET]
        = gtk_signal_new ("owner_unset",
                  GTK_RUN_FIRST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EvolutionShellComponentClass, owner_unset),
                  gtk_marshal_NONE__NONE,
                  GTK_TYPE_NONE, 0);

    signals[DEBUG]
        = gtk_signal_new ("debug",
                  GTK_RUN_FIRST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EvolutionShellComponentClass, debug),
                  gtk_marshal_NONE__NONE,
                  GTK_TYPE_NONE, 0);

    signals[INTERACTIVE]
        = gtk_signal_new ("interactive",
                  GTK_RUN_FIRST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EvolutionShellComponentClass, interactive),
                  gtk_marshal_NONE__BOOL,
                  GTK_TYPE_NONE, 1,
                  GTK_TYPE_BOOL);

    signals[HANDLE_EXTERNAL_URI]
        = gtk_signal_new ("handle_external_uri",
                  GTK_RUN_FIRST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EvolutionShellComponentClass, handle_external_uri),
                  gtk_marshal_NONE__STRING,
                  GTK_TYPE_NONE, 1,
                  GTK_TYPE_STRING);

    signals[USER_CREATE_NEW_ITEM]
        = gtk_signal_new ("user_create_new_item",
                  GTK_RUN_FIRST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EvolutionShellComponentClass, user_create_new_item),
                  gtk_marshal_NONE__POINTER_POINTER_POINTER,
                  GTK_TYPE_NONE, 3,
                  GTK_TYPE_STRING,
                  GTK_TYPE_STRING,
                  GTK_TYPE_STRING);

    signals[SEND_RECEIVE]
        = gtk_signal_new ("send_receive",
                  GTK_RUN_FIRST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EvolutionShellComponentClass, send_receive),
                  gtk_marshal_NONE__BOOL,
                  GTK_TYPE_NONE, 1,
                  GTK_TYPE_BOOL);

    gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL);

    parent_class = gtk_type_class (PARENT_TYPE);

    epv->_get_supportedTypes         = impl__get_supportedTypes;
    epv->_get_externalUriSchemas     = impl__get_externalUriSchemas;
    epv->_get_userCreatableItemTypes = impl__get_userCreatableItemTypes;
    epv->setOwner                    = impl_setOwner; 
    epv->unsetOwner                  = impl_unsetOwner; 
    epv->debug                       = impl_debug;
    epv->interactive                 = impl_interactive;
    epv->createView                  = impl_createView; 
    epv->handleExternalURI           = impl_handleExternalURI; 
    epv->createFolderAsync           = impl_createFolderAsync; 
    epv->removeFolderAsync           = impl_removeFolderAsync; 
    epv->xferFolderAsync             = impl_xferFolderAsync; 
    epv->populateFolderContextMenu   = impl_populateFolderContextMenu;
    epv->userCreateNewItem           = impl_userCreateNewItem;
    epv->sendReceive                 = impl_sendReceive;

    shell_component_class = EVOLUTION_SHELL_COMPONENT_CLASS (object_class);
    shell_component_class->owner_died = impl_owner_died;
    shell_component_class->owner_unset = impl_owner_unset;
}

static void
init (EvolutionShellComponent *shell_component)
{
    EvolutionShellComponentPrivate *priv;

    priv = g_new (EvolutionShellComponentPrivate, 1);

    priv->folder_types                    = NULL;
    priv->external_uri_schemas            = NULL;

    priv->create_view_fn                  = NULL;
    priv->create_folder_fn                = NULL;
    priv->remove_folder_fn                = NULL;
    priv->xfer_folder_fn                  = NULL;
    priv->populate_folder_context_menu_fn = NULL;

    priv->owner_client                    = NULL;
    priv->user_creatable_item_types       = NULL;
    priv->closure                         = NULL;

    priv->ping_timeout_id                 = -1;

    shell_component->priv = priv;
}


void
evolution_shell_component_construct (EvolutionShellComponent *shell_component,
                     const EvolutionShellComponentFolderType folder_types[],
                     const char *external_uri_schemas[],
                     EvolutionShellComponentCreateViewFn create_view_fn,
                     EvolutionShellComponentCreateFolderFn create_folder_fn,
                     EvolutionShellComponentRemoveFolderFn remove_folder_fn,
                     EvolutionShellComponentXferFolderFn xfer_folder_fn,
                     EvolutionShellComponentPopulateFolderContextMenuFn populate_folder_context_menu_fn,
                     EvolutionShellComponentGetDndSelectionFn get_dnd_selection_fn,
                     void *closure)
{
    EvolutionShellComponentPrivate *priv;
    int i;

    g_return_if_fail (shell_component != NULL);
    g_return_if_fail (EVOLUTION_IS_SHELL_COMPONENT (shell_component));
    g_return_if_fail (folder_types != NULL);

    priv = shell_component->priv;

    priv->create_view_fn                  = create_view_fn;
    priv->create_folder_fn                = create_folder_fn;
    priv->remove_folder_fn                = remove_folder_fn;
    priv->xfer_folder_fn                  = xfer_folder_fn;
    priv->populate_folder_context_menu_fn = populate_folder_context_menu_fn;
    priv->get_dnd_selection_fn            = get_dnd_selection_fn;

    priv->closure = closure;

    for (i = 0; folder_types[i].name != NULL; i++) {
        EvolutionShellComponentFolderType *new;

        if (folder_types[i].icon_name == NULL
            || folder_types[i].name[0] == '\0'
            || folder_types[i].icon_name[0] == '\0')
            continue;

        new = g_new (EvolutionShellComponentFolderType, 1);
        new->name               = g_strdup (folder_types[i].name);
        new->icon_name          = g_strdup (folder_types[i].icon_name);

        /* Notice that these get translated here.  */
        new->display_name       = g_strdup (_(folder_types[i].display_name));
        new->description        = g_strdup (_(folder_types[i].description));

        new->user_creatable     = folder_types[i].user_creatable;
        new->accepted_dnd_types = duplicate_null_terminated_string_array (folder_types[i].accepted_dnd_types);
        new->exported_dnd_types = duplicate_null_terminated_string_array (folder_types[i].exported_dnd_types);

        priv->folder_types = g_list_prepend (priv->folder_types, new);
    }

    if (priv->folder_types == NULL)
        g_warning ("No valid folder types constructing EShellComponent %p", shell_component);

    if (external_uri_schemas != NULL) {
        for (i = 0; external_uri_schemas[i] != NULL; i++)
            priv->external_uri_schemas = g_list_prepend (priv->external_uri_schemas,
                                     g_strdup (external_uri_schemas[i]));
    }
}

EvolutionShellComponent *
evolution_shell_component_new (const EvolutionShellComponentFolderType folder_types[],
                   const char *external_uri_schemas[],
                   EvolutionShellComponentCreateViewFn create_view_fn,
                   EvolutionShellComponentCreateFolderFn create_folder_fn,
                   EvolutionShellComponentRemoveFolderFn remove_folder_fn,
                   EvolutionShellComponentXferFolderFn xfer_folder_fn,
                   EvolutionShellComponentPopulateFolderContextMenuFn populate_folder_context_menu_fn,
                   EvolutionShellComponentGetDndSelectionFn get_dnd_selection_fn,
                   void *closure)
{
    EvolutionShellComponent *new;

    g_return_val_if_fail (folder_types != NULL, NULL);

    new = gtk_type_new (evolution_shell_component_get_type ());

    evolution_shell_component_construct (new,
                         folder_types,
                         external_uri_schemas,
                         create_view_fn,
                         create_folder_fn,
                         remove_folder_fn,
                         xfer_folder_fn,
                         populate_folder_context_menu_fn,
                         get_dnd_selection_fn,
                         closure);

    return new;
}

EvolutionShellClient *
evolution_shell_component_get_owner  (EvolutionShellComponent *shell_component)
{
    g_return_val_if_fail (shell_component != NULL, NULL);
    g_return_val_if_fail (EVOLUTION_IS_SHELL_COMPONENT (shell_component), NULL);

    return shell_component->priv->owner_client;
}


void
evolution_shell_component_add_user_creatable_item  (EvolutionShellComponent *shell_component,
                            const char *id,
                            const char *description,
                            const char *menu_description,
                            char menu_shortcut,
                            GdkPixbuf *icon)
{
    EvolutionShellComponentPrivate *priv;
    UserCreatableItemType *type;

    g_return_if_fail (shell_component != NULL);
    g_return_if_fail (EVOLUTION_IS_SHELL_COMPONENT (shell_component));
    g_return_if_fail (id != NULL);
    g_return_if_fail (description != NULL);
    g_return_if_fail (menu_description != NULL);

    priv = shell_component->priv;

    type = user_creatable_item_type_new (id, description, menu_description, menu_shortcut, icon);

    priv->user_creatable_item_types = g_slist_prepend (priv->user_creatable_item_types, type);
}


/* Public utility functions.  */

const char *
evolution_shell_component_result_to_string (EvolutionShellComponentResult result)
{
    switch (result) {
    case EVOLUTION_SHELL_COMPONENT_OK:
        return _("Success");
    case EVOLUTION_SHELL_COMPONENT_CORBAERROR:
        return _("CORBA error");
    case EVOLUTION_SHELL_COMPONENT_INTERRUPTED:
        return _("Interrupted");
    case EVOLUTION_SHELL_COMPONENT_INVALIDARG:
        return _("Invalid argument");
    case EVOLUTION_SHELL_COMPONENT_ALREADYOWNED:
        return _("Already has an owner");
    case EVOLUTION_SHELL_COMPONENT_NOTOWNED:
        return _("No owner");
    case EVOLUTION_SHELL_COMPONENT_NOTFOUND:
        return _("Not found");
    case EVOLUTION_SHELL_COMPONENT_UNSUPPORTEDTYPE:
        return _("Unsupported type");
    case EVOLUTION_SHELL_COMPONENT_UNSUPPORTEDSCHEMA:
        return _("Unsupported schema");
    case EVOLUTION_SHELL_COMPONENT_UNSUPPORTEDOPERATION:
        return _("Unsupported operation");
    case EVOLUTION_SHELL_COMPONENT_INTERNALERROR:
        return _("Internal error");
    case EVOLUTION_SHELL_COMPONENT_BUSY:
        return _("Busy");
    case EVOLUTION_SHELL_COMPONENT_EXISTS:
        return _("Exists");
    case EVOLUTION_SHELL_COMPONENT_INVALIDURI:
        return _("Invalid URI");
    case EVOLUTION_SHELL_COMPONENT_PERMISSIONDENIED:
        return _("Permission denied");
    case EVOLUTION_SHELL_COMPONENT_HASSUBFOLDERS:
        return _("Has subfolders");
    case EVOLUTION_SHELL_COMPONENT_NOSPACE:
        return _("No space left");
    case EVOLUTION_SHELL_COMPONENT_OLDOWNERHASDIED:
        return _("Old owner has died");
    case EVOLUTION_SHELL_COMPONENT_UNKNOWNERROR:
    default:
        return _("Unknown error");
    }
}


E_MAKE_X_TYPE (evolution_shell_component, "EvolutionShellComponent", EvolutionShellComponent,
           class_init, init, PARENT_TYPE,
           POA_GNOME_Evolution_ShellComponent__init,
           GTK_STRUCT_OFFSET (EvolutionShellComponentClass, epv))