diff options
Diffstat (limited to 'e-util/e-list-iterator.c')
| -rw-r--r-- | e-util/e-list-iterator.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/e-util/e-list-iterator.c b/e-util/e-list-iterator.c new file mode 100644 index 0000000000..19ebbef681 --- /dev/null +++ b/e-util/e-list-iterator.c @@ -0,0 +1,199 @@ +/* -*- 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 gboolean e_list_iterator_prev (EIterator *iterator); +static gboolean e_list_iterator_next (EIterator *iterator); +static void e_list_iterator_reset (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->next = e_list_iterator_next; + iterator_class->prev = e_list_iterator_prev; + iterator_class->delete = e_list_iterator_delete; + 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 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_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; +} |