/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Authors:
* Christopher James Lahey <clahey@umich.edu>
*
* Copyright (C) 2000 Helix Code, Inc.
* Copyright (C) 1999 The Free Software Foundation
*/
#include <config.h>
#include <gtk/gtk.h>
#include "e-list-iterator.h"
#include "e-list.h"
static void e_list_iterator_init (EListIterator *list);
static void e_list_iterator_class_init (EListIteratorClass *klass);
static void e_list_iterator_invalidate (EIterator *iterator);
static gboolean e_list_iterator_is_valid (EIterator *iterator);
static void e_list_iterator_set (EIterator *iterator,
const void *object);
static void e_list_iterator_delete (EIterator *iterator);
static void e_list_iterator_insert (EIterator *iterator,
const void *object,
gboolean before);
static gboolean e_list_iterator_prev (EIterator *iterator);
static gboolean e_list_iterator_next (EIterator *iterator);
static void e_list_iterator_reset (EIterator *iterator);
static void e_list_iterator_last (EIterator *iterator);
static const void *e_list_iterator_get (EIterator *iterator);
static void e_list_iterator_destroy (GtkObject *object);
#define PARENT_TYPE (e_iterator_get_type ())
static GtkObjectClass *parent_class;
#define PARENT_CLASS (E_LIST_ITERATOR_CLASS(parent_class))
/**
* e_list_iterator_get_type:
* @void:
*
* Registers the &EListIterator class if necessary, and returns the type ID
* associated to it.
*
* Return value: The type ID of the &EListIterator class.
**/
GtkType
e_list_iterator_get_type (void)
{
static GtkType type = 0;
if (!type) {
GtkTypeInfo info = {
"EListIterator",
sizeof (EListIterator),
sizeof (EListIteratorClass),
(GtkClassInitFunc) e_list_iterator_class_init,
(GtkObjectInitFunc) e_list_iterator_init,
NULL, /* reserved_1 */
NULL, /* reserved_2 */
(GtkClassInitFunc) NULL
};
type = gtk_type_unique (PARENT_TYPE, &info);
}
return type;
}
static void
e_list_iterator_class_init (EListIteratorClass *klass)
{
GtkObjectClass *object_class;
EIteratorClass *iterator_class;
object_class = GTK_OBJECT_CLASS(klass);
iterator_class = E_ITERATOR_CLASS(klass);
parent_class = gtk_type_class (PARENT_TYPE);
object_class->destroy = e_list_iterator_destroy;
iterator_class->invalidate = e_list_iterator_invalidate;
iterator_class->get = e_list_iterator_get;
iterator_class->reset = e_list_iterator_reset;
iterator_class->last = e_list_iterator_last;
iterator_class->next = e_list_iterator_next;
iterator_class->prev = e_list_iterator_prev;
iterator_class->delete = e_list_iterator_delete;
iterator_class->insert = e_list_iterator_insert;
iterator_class->set = e_list_iterator_set;
iterator_class->is_valid = e_list_iterator_is_valid;
}
/**
* e_list_iterator_init:
*/
static void
e_list_iterator_init (EListIterator *list)
{
}
EIterator *
e_list_iterator_new (EList *list)
{
EListIterator *iterator = gtk_type_new(e_list_iterator_get_type());
iterator->list = list;
gtk_object_ref(GTK_OBJECT(list));
iterator->iterator = list->list;
return E_ITERATOR(iterator);
}
/*
* Virtual functions:
*/
static void
e_list_iterator_destroy (GtkObject *object)
{
EListIterator *iterator = E_LIST_ITERATOR(object);
e_list_remove_iterator(iterator->list, E_ITERATOR(iterator));
gtk_object_unref(GTK_OBJECT(iterator->list));
}
static const void *
e_list_iterator_get (EIterator *_iterator)
{
EListIterator *iterator = E_LIST_ITERATOR(_iterator);
if (iterator->iterator)
return iterator->iterator->data;
else
return NULL;
}
static void
e_list_iterator_reset (EIterator *_iterator)
{
EListIterator *iterator = E_LIST_ITERATOR(_iterator);
iterator->iterator = iterator->list->list;
}
static void
e_list_iterator_last (EIterator *_iterator)
{
EListIterator *iterator = E_LIST_ITERATOR(_iterator);
iterator->iterator = g_list_last(iterator->list->list);
}
static gboolean
e_list_iterator_next (EIterator *_iterator)
{
EListIterator *iterator = E_LIST_ITERATOR(_iterator);
if (iterator->iterator)
iterator->iterator = g_list_next(iterator->iterator);
return (iterator->iterator != NULL);
}
static gboolean
e_list_iterator_prev (EIterator *_iterator)
{
EListIterator *iterator = E_LIST_ITERATOR(_iterator);
if (iterator->iterator)
iterator->iterator = g_list_previous(iterator->iterator);
return (iterator->iterator != NULL);
}
static void
e_list_iterator_insert (EIterator *_iterator,
const void *object,
gboolean before)
{
EListIterator *iterator = E_LIST_ITERATOR(_iterator);
void *data;
if (iterator->list->copy)
data = iterator->list->copy(object, iterator->list->closure);
else
data = (void *) object;
if (iterator->iterator) {
if (before) {
iterator->list->list = g_list_first(g_list_prepend(iterator->iterator, data));
iterator->iterator = iterator->iterator->prev;
} else {
if (iterator->iterator->next)
g_list_prepend(iterator->iterator->next, data);
else
g_list_append(iterator->iterator, data);
iterator->iterator = iterator->iterator->next;
}
e_list_invalidate_iterators(iterator->list, E_ITERATOR(iterator));
} else {
if (before) {
iterator->list->list = g_list_append(iterator->list->list, data);
iterator->iterator = g_list_last(iterator->list->list);
} else {
iterator->list->list = g_list_prepend(iterator->list->list, data);
iterator->iterator = iterator->list->list;
}
e_list_invalidate_iterators(iterator->list, E_ITERATOR(iterator));
}
}
static void
e_list_iterator_delete (EIterator *_iterator)
{
EListIterator *iterator = E_LIST_ITERATOR(_iterator);
if (iterator->iterator) {
GList *temp = iterator->iterator->next;
if (iterator->list->free)
iterator->list->free(iterator->iterator->data, iterator->list->closure);
iterator->list->list = g_list_remove_link(iterator->list->list, iterator->iterator);
iterator->iterator = temp;
e_list_invalidate_iterators(iterator->list, E_ITERATOR(iterator));
}
}
static void
e_list_iterator_set (EIterator *_iterator,
const void *object)
{
EListIterator *iterator = E_LIST_ITERATOR(_iterator);
if (iterator->iterator) {
if (iterator->list->free)
iterator->list->free(iterator->iterator->data, iterator->list->closure);
if (iterator->list->copy)
iterator->iterator->data = iterator->list->copy(object, iterator->list->closure);
else
iterator->iterator->data = (void *) object;
}
}
static gboolean
e_list_iterator_is_valid (EIterator *_iterator)
{
EListIterator *iterator = E_LIST_ITERATOR(_iterator);
return iterator->iterator != NULL;
}
static void
e_list_iterator_invalidate (EIterator *_iterator)
{
EListIterator *iterator = E_LIST_ITERATOR(_iterator);
iterator->iterator = NULL;
}
