path: root/widgets/misc/e-attachment-handler.c

/*
 * e-attachment-handler.c
 *
 * This program 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) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include "e-attachment-handler.h"

#define E_ATTACHMENT_HANDLER_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_ATTACHMENT_HANDLER, EAttachmentHandlerPrivate))

struct _EAttachmentHandlerPrivate {
    gpointer placeholder;
};

G_DEFINE_TYPE (
    EAttachmentHandler,
    e_attachment_handler,
    E_TYPE_EXTENSION)

static void
attachment_handler_constructed (GObject *object)
{
    EAttachmentView *view;
    EAttachmentHandler *handler;
    GdkDragAction drag_actions;
    GtkTargetList *target_list;
    const GtkTargetEntry *targets;
    guint n_targets;

    handler = E_ATTACHMENT_HANDLER (object);
    drag_actions = e_attachment_handler_get_drag_actions (handler);
    targets = e_attachment_handler_get_target_table (handler, &n_targets);

    view = e_attachment_handler_get_view (handler);

    target_list = e_attachment_view_get_target_list (view);
    gtk_target_list_add_table (target_list, targets, n_targets);

    e_attachment_view_add_drag_actions (view, drag_actions);

    /* Chain up to parent's constructed() method. */
    if (G_OBJECT_CLASS (e_attachment_handler_parent_class))
        G_OBJECT_CLASS (e_attachment_handler_parent_class)->constructed (object);
}

static void
e_attachment_handler_class_init (EAttachmentHandlerClass *class)
{
    GObjectClass *object_class;
    EExtensionClass *extension_class;

    g_type_class_add_private (class, sizeof (EAttachmentHandlerPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->constructed = attachment_handler_constructed;

    extension_class = E_EXTENSION_CLASS (class);
    extension_class->extensible_type = E_TYPE_ATTACHMENT_VIEW;
}

static void
e_attachment_handler_init (EAttachmentHandler *handler)
{
    handler->priv = E_ATTACHMENT_HANDLER_GET_PRIVATE (handler);
}

EAttachmentView *
e_attachment_handler_get_view (EAttachmentHandler *handler)
{
    EExtensible *extensible;

    /* This is purely a convenience function. */

    g_return_val_if_fail (E_IS_ATTACHMENT_HANDLER (handler), NULL);

    extensible = e_extension_get_extensible (E_EXTENSION (handler));

    return E_ATTACHMENT_VIEW (extensible);
}

GdkDragAction
e_attachment_handler_get_drag_actions (EAttachmentHandler *handler)
{
    EAttachmentHandlerClass *class;

    g_return_val_if_fail (E_IS_ATTACHMENT_HANDLER (handler), 0);

    class = E_ATTACHMENT_HANDLER_GET_CLASS (handler);

    if (class->get_drag_actions != NULL)
        return class->get_drag_actions (handler);

    return 0;
}

const GtkTargetEntry *
e_attachment_handler_get_target_table (EAttachmentHandler *handler,
                                       guint *n_targets)
{
    EAttachmentHandlerClass *class;

    g_return_val_if_fail (E_IS_ATTACHMENT_HANDLER (handler), NULL);

    class = E_ATTACHMENT_HANDLER_GET_CLASS (handler);

    if (class->get_target_table != NULL)
        return class->get_target_table (handler, n_targets);

    if (n_targets != NULL)
        *n_targets = 0;

    return NULL;
}