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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
* This library 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.
*
* This library 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 this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Christopher James Lahey <clahey@umich.edu>
*/
#include "evolution-data-server-config.h"
#include "e-iterator.h"
enum {
INVALIDATE,
LAST_SIGNAL
};
static guint e_iterator_signals[LAST_SIGNAL] = { 0, };
G_DEFINE_TYPE (EIterator, e_iterator, G_TYPE_OBJECT)
static void
e_iterator_class_init (EIteratorClass *class)
{
GObjectClass *object_class;
object_class = G_OBJECT_CLASS (class);
e_iterator_signals[INVALIDATE] = g_signal_new (
"invalidate",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (EIteratorClass, invalidate),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
}
static void
e_iterator_init (EIterator *card)
{
}
/*
* Virtual functions:
*
*/
/**
* e_iterator_get:
* @iterator: an #EIterator
*
* Returns: (transfer none): the iterator value
**/
gconstpointer
e_iterator_get (EIterator *iterator)
{
if (E_ITERATOR_GET_CLASS (iterator)->get)
return E_ITERATOR_GET_CLASS (iterator)->get (iterator);
else
return NULL;
}
/**
* e_iterator_reset:
* @iterator: an #EIterator
*
* Resets the iterator to the beginning.
**/
void
e_iterator_reset (EIterator *iterator)
{
if (E_ITERATOR_GET_CLASS (iterator)->reset)
E_ITERATOR_GET_CLASS (iterator)->reset (iterator);
}
/**
* e_iterator_last:
* @iterator: an #EIterator
*
* Moves the iterator to the last item.
**/
void
e_iterator_last (EIterator *iterator)
{
if (E_ITERATOR_GET_CLASS (iterator)->last)
E_ITERATOR_GET_CLASS (iterator)->last (iterator);
}
/**
* e_iterator_next:
* @iterator: an #EIterator
*
* Moves the iterator to the next item.
*
* Returns: Whether succeeded
**/
gboolean
e_iterator_next (EIterator *iterator)
{
if (E_ITERATOR_GET_CLASS (iterator)->next)
return E_ITERATOR_GET_CLASS (iterator)->next (iterator);
else
return FALSE;
}
/**
* e_iterator_prev:
* @iterator: an #EIterator
*
* Moves the iterator to the previous item.
*
* Returns: Whether succeeded
**/
gboolean
e_iterator_prev (EIterator *iterator)
{
if (E_ITERATOR_GET_CLASS (iterator)->prev)
return E_ITERATOR_GET_CLASS (iterator)->prev (iterator);
else
return FALSE;
}
/**
* e_iterator_delete:
* @iterator: an #EIterator
*
* Deletes the item in the current position of the iterator.
**/
void
e_iterator_delete (EIterator *iterator)
{
if (E_ITERATOR_GET_CLASS (iterator)->remove)
E_ITERATOR_GET_CLASS (iterator)->remove (iterator);
}
/**
* e_iterator_insert:
* @iterator: an #EIterator
* @object: an object to insert
* @before: where to insert the object
*
* Inserts the @object before or after the current position of the iterator.
**/
void
e_iterator_insert (EIterator *iterator,
gconstpointer object,
gboolean before)
{
if (E_ITERATOR_GET_CLASS (iterator)->insert)
E_ITERATOR_GET_CLASS (iterator)->insert (iterator, object, before);
}
/**
* e_iterator_set:
* @iterator: an #EIterator
* @object: an object to set
*
* Sets value of the current position of the iterator to the @object.
**/
void
e_iterator_set (EIterator *iterator,
gconstpointer object)
{
if (E_ITERATOR_GET_CLASS (iterator)->set)
E_ITERATOR_GET_CLASS (iterator)->set (iterator, object);
}
/**
* e_iterator_is_valid:
* @iterator: an #EIterator
*
* Returns: whether the iterator is valid.
**/
gboolean
e_iterator_is_valid (EIterator *iterator)
{
if (!iterator)
return FALSE;
if (E_ITERATOR_GET_CLASS (iterator)->is_valid)
return E_ITERATOR_GET_CLASS (iterator)->is_valid (iterator);
else
return FALSE;
}
/**
* e_iterator_invalidate:
* @iterator: an #EIterator
*
* Invalidates the iterator.
**/
void
e_iterator_invalidate (EIterator *iterator)
{
g_return_if_fail (iterator != NULL);
g_return_if_fail (E_IS_ITERATOR (iterator));
g_signal_emit (iterator, e_iterator_signals[INVALIDATE], 0);
}
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