path: root/calendar/gui/comp-editor-factory.c

/* Evolution calendar - Component editor factory object
 *
 * Copyright (C) 2001 Ximian, Inc.
 *
 * Authors: Federico Mena-Quintero <federico@ximian.com>
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */

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

#include <cal-client/cal-client.h>
#include "comp-editor-factory.h"



/* A pending request */

typedef enum {
    REQUEST_EXISTING,
    REQUEST_NEW
} RequestType;

typedef struct {
    RequestType type;

    union {
        struct {
            char *uid;
        } existing;

        struct {
            CalObjType type;
        } new;
    } u;
} Request;

/* A client we have open */
typedef struct {
    /* Uri of the calendar, used as key in the clients hash table */
    GnomeVFSURI *uri;

    /* Client of the calendar */
    CalClient *client;

    /* Hash table of components that belong to this client */
    GHashTable *uid_comp_hash;

    /* Pending requests; they are pending if the client is still being opened */
    GSList *pending;
} OpenClient;

/* A component that is being edited */
typedef struct {
    /* Our parent client */
    OpenClient *parent;

    /* UID of the component we are editing, used as the key in the hash table */
    const char *uid;

    /* Component we are editing */
    CalComponent *comp;
} Component;

/* Private part of the CompEditorFactory structure */
struct CompEditorFactoryPrivate {
    /* Hash table of URI->OpenClient */
    GHashTable *uri_client_hash;
};



static void comp_editor_factory_class_init (CompEditorFactoryClass *class);
static void comp_editor_factory_init (CompEditorFactory *factory);
static void comp_editor_factory_destroy (GtkObject *object);

static void impl_editExisting (PortableServer_Servant servant,
                   const CORBA_char *uri,
                   const GNOME_Evolution_Calendar_CalObjUID uid,
                   CORBA_Environment *ev);
static void impl_editNew (PortableServer_Servant servant,
              const CORBA_char *uri,
              const GNOME_Evolution_Calendar_CalObjType type,
              CORBA_Environment *ev);

static BonoboXObjectClass *parent_class = NULL;



BONOBO_X_TYPE_FUNC_FULL (CompEditorFactory,
             GNOME_Evolution_Calendar_CompEditorFactory,
             BONOBO_X_OBJECT_TYPE,
             comp_editor_factory);

/* Class initialization function for the component editor factory */
static void
comp_editor_factory_class_init (CompEditorFactoryClass *class)
{
    GtkObjectClass *object_class;

    object_class = (GtkObjectClass *) class;

    parent_class = gtk_type_class (BONOBO_X_OBJECT_TYPE);

    class->epv.editExisting = impl_editExisting;
    class->epv.editNew = impl_editNew;

    object_class->destroy = comp_editor_factory_destroy;
}

/* Object initialization function for the component editor factory */
static void
comp_editor_factory_init (CompEditorFactory *factory)
{
    CompEditorFactoryPrivate *priv;

    priv = g_new (CompEditorFactoryPrivate, 1);

    priv->uri_client_hash = g_hash_table_new (gnome_vfs_uri_hash, gnome_vfs_uri_hequal);
}

/* Used from g_hash_table_foreach(); frees a component structure */
static void
free_component_cb (gpointer key, gpointer value, gpointer data)
{
    Component *c;

    c = value;

    c->parent = NULL;
    c->uid = NULL;

    cal_component_unref (c->comp);
    c->comp = NULL;

    g_free (c);
}

/* Used from g_hash_table_foreach(); frees a client structure */
static void
free_client_cb (gpointer key, gpointer value, gpointer data)
{
    OpenClient *oc;
    GSList *l;

    oc = value;

    gnome_vfs_uri_unref (oc->uri);
    oc->uri = NULL;

    cal_client_unref (oc->client);
    oc->client = NULL;

    g_hash_table_foreach (oc->uid_comp_hash, free_component_cb, NULL);
    g_hash_table_destroy (oc->uid_comp_hash);
    oc->uid_comp_hash = NULL;

    for (l = oc->pending; l; l = l->next) {
        Request *r;

        r = l->data;

        if (r->type == REQUEST_EXISTING) {
            g_assert (r->u.existing.uid != NULL);
            g_free (r->u.existing.uid);
        }

        g_free (r);
    }
    g_slist_free (oc->pending);
    oc->pending = NULL;

    g_free (oc);
}

/* Destroy handler for the component editor factory */
static void
comp_editor_factory_destroy (GtkObject *object)
{
    CompEditorFactory *factory;
    CompEditorFactoryPrivate *priv;

    g_return_if_fail (object != NULL);
    g_return_if_fail (IS_COMP_EDITOR_FACTORY (object));

    factory = COMP_EDITOR_FACTORY (object);
    priv = factory->priv;

    g_hash_table_foreach (priv->uri_client_hash, free_client_cb, NULL);
    g_hash_table_destroy (priv->uri_client_hash);
    priv->uri_client_hash = NULL;

    g_free (priv);
    factory->priv = NULL;

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



/* Creates a new OpenClient structure and queues the component editing/creation
 * process until the client is open.  Returns NULL if it could not issue the
 * open request.
 */
static OpenClient *
open_client (GnomeVFSURI *uri, gboolean only_if_exists)
{
    CalClient *client;

    client = cal_client_new ();
    if (!client)
        return NULL;

    oc = g_new (OpenClient, 1);

    gnome_vfs_uri_ref (uri);
    oc->uri = uri;

    oc->client = client;
    oc->uid_comp_hash = g_hash_table_new (g_str_hash, g_str_equal);
    oc->pending = NULL;

    gtk_signal_connect (GTK_OBJECT (oc->client), "cal_opened",
                GTK_SIGNAL_FUNC (cal_opened_cb), oc);

    if (!cal_client_open_calendar (oc->client, uri, only_if_exists)) {
        gnome_vfs_uri_unref (oc->uri);
        gtk_object_unref (GTK_OBJECT (oc->client));
        g_hash_table_destroy (oc->uid_comp_hash);
        g_free (oc);

        return NULL;
    }

    return oc;
}

static void
impl_editExisting (PortableServer_Servant servant,
           const CORBA_char *str_uri,
           const GNOME_Evolution_Calendar_CalObjUID uid,
           CORBA_Environment *ev)
{
    CompEditorFactory *factory;
    CompEditorFactoryPrivate *priv;
    GnomeVFSURI *uri;
    OpenClient *oc;
    CalClient *client;
    Component *c;

    factory = COMP_EDITOR_FACTORY (bonobo_object_from_servant (servant));
    priv = factory->priv;

    /* Look up the client */

    uri = gnome_vfs_uri_new (str_uri);
    if (!uri) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_Calendar_CompEditorFactory_InvalidURI,
                     NULL);
        return;
    }

    oc = g_hash_table_lookup (priv->uri_client_hash, uri);
    if (oc)
        client = oc->client;
    else {
        oc = open_client (uri);
        if (!oc) {
            gnome_vfs_uri_unref (uri);

            CORBA_exception_set (
                ev, CORBA_USER_EXCEPTION,
                ex_GNOME_Evolution_Calendar_CompEditorFactory_BackendContactError,
                NULL);
            return;
        }

        client = oc->client;
    }

    gnome_vfs_uri_unref (uri);

    /* Look up the component */

    c = g_hash_table_lookup (oc->uid_comp_hash, 
}