1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
2 /*
3 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
4 *
5 * This library is free software: you can redistribute it and/or modify it
6 * under the terms of the GNU Lesser General Public License as published by
7 * the Free Software Foundation.
8 *
9 * This library is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public License
15 * along with this library. If not, see <http://www.gnu.org/licenses/>.
16 *
17 * Authors: Christopher James Lahey <clahey@umich.edu>
18 */
19
20 #include "evolution-data-server-config.h"
21
22 #include "e-list-iterator.h"
23 #include "e-list.h"
24
25 static void e_list_iterator_invalidate (EIterator *iterator);
26 static gboolean e_list_iterator_is_valid (EIterator *iterator);
27 static void e_list_iterator_set (EIterator *iterator,
28 gconstpointer object);
29 static void e_list_iterator_remove (EIterator *iterator);
30 static void e_list_iterator_insert (EIterator *iterator,
31 gconstpointer object,
32 gboolean before);
33 static gboolean e_list_iterator_prev (EIterator *iterator);
34 static gboolean e_list_iterator_next (EIterator *iterator);
35 static void e_list_iterator_reset (EIterator *iterator);
36 static void e_list_iterator_last (EIterator *iterator);
37 static gconstpointer e_list_iterator_get (EIterator *iterator);
38 static void e_list_iterator_dispose (GObject *object);
39
G_DEFINE_TYPE(EListIterator,e_list_iterator,E_TYPE_ITERATOR)40 G_DEFINE_TYPE (EListIterator, e_list_iterator, E_TYPE_ITERATOR)
41
42 static void
43 e_list_iterator_class_init (EListIteratorClass *class)
44 {
45 GObjectClass *object_class;
46 EIteratorClass *iterator_class;
47
48 object_class = G_OBJECT_CLASS (class);
49 object_class->dispose = e_list_iterator_dispose;
50
51 iterator_class = E_ITERATOR_CLASS (class);
52 iterator_class->invalidate = e_list_iterator_invalidate;
53 iterator_class->get = e_list_iterator_get;
54 iterator_class->reset = e_list_iterator_reset;
55 iterator_class->last = e_list_iterator_last;
56 iterator_class->next = e_list_iterator_next;
57 iterator_class->prev = e_list_iterator_prev;
58 iterator_class->remove = e_list_iterator_remove;
59 iterator_class->insert = e_list_iterator_insert;
60 iterator_class->set = e_list_iterator_set;
61 iterator_class->is_valid = e_list_iterator_is_valid;
62 }
63
64 /**
65 * e_list_iterator_init:
66 */
67 static void
e_list_iterator_init(EListIterator * list)68 e_list_iterator_init (EListIterator *list)
69 {
70 }
71
72 EIterator *
e_list_iterator_new(EList * list)73 e_list_iterator_new (EList *list)
74 {
75 EListIterator *iterator = NULL;
76
77 g_return_val_if_fail (list != NULL, NULL);
78 g_return_val_if_fail (E_IS_LIST (list), NULL);
79
80 iterator = g_object_new (E_TYPE_LIST_ITERATOR, NULL);
81 if (!iterator)
82 return NULL;
83 iterator->list = list;
84 g_object_ref (list);
85 iterator->iterator = list->list;
86
87 return E_ITERATOR (iterator);
88 }
89
90 /*
91 * Virtual functions:
92 */
93 static void
e_list_iterator_dispose(GObject * object)94 e_list_iterator_dispose (GObject *object)
95 {
96 EListIterator *iterator = E_LIST_ITERATOR (object);
97 e_list_remove_iterator (iterator->list, E_ITERATOR (iterator));
98 g_object_unref (iterator->list);
99
100 /* Chain up to parent's dispose() method. */
101 G_OBJECT_CLASS (e_list_iterator_parent_class)->dispose (object);
102 }
103
104 static gconstpointer
e_list_iterator_get(EIterator * _iterator)105 e_list_iterator_get (EIterator *_iterator)
106 {
107 EListIterator *iterator = E_LIST_ITERATOR (_iterator);
108 if (iterator->iterator)
109 return iterator->iterator->data;
110 else
111 return NULL;
112 }
113
114 static void
e_list_iterator_reset(EIterator * _iterator)115 e_list_iterator_reset (EIterator *_iterator)
116 {
117 EListIterator *iterator = E_LIST_ITERATOR (_iterator);
118 iterator->iterator = iterator->list->list;
119 }
120
121 static void
e_list_iterator_last(EIterator * _iterator)122 e_list_iterator_last (EIterator *_iterator)
123 {
124 EListIterator *iterator = E_LIST_ITERATOR (_iterator);
125 iterator->iterator = g_list_last (iterator->list->list);
126 }
127
128 static gboolean
e_list_iterator_next(EIterator * _iterator)129 e_list_iterator_next (EIterator *_iterator)
130 {
131 EListIterator *iterator = E_LIST_ITERATOR (_iterator);
132 if (iterator->iterator)
133 iterator->iterator = g_list_next (iterator->iterator);
134 else
135 iterator->iterator = iterator->list->list;
136 return (iterator->iterator != NULL);
137 }
138
139 static gboolean
e_list_iterator_prev(EIterator * _iterator)140 e_list_iterator_prev (EIterator *_iterator)
141 {
142 EListIterator *iterator = E_LIST_ITERATOR (_iterator);
143 if (iterator->iterator)
144 iterator->iterator = g_list_previous (iterator->iterator);
145 else
146 iterator->iterator = g_list_last (iterator->list->list);
147 return (iterator->iterator != NULL);
148 }
149
150 static void
e_list_iterator_insert(EIterator * _iterator,gconstpointer object,gboolean before)151 e_list_iterator_insert (EIterator *_iterator,
152 gconstpointer object,
153 gboolean before)
154 {
155 EListIterator *iterator = E_LIST_ITERATOR (_iterator);
156 gpointer data;
157 if (iterator->list->copy)
158 data = iterator->list->copy (object, iterator->list->closure);
159 else
160 data = (gpointer) object;
161 if (iterator->iterator) {
162 if (before) {
163 iterator->list->list = g_list_first (g_list_prepend (iterator->iterator, data));
164 iterator->iterator = iterator->iterator->prev;
165 } else {
166 if (iterator->iterator->next)
167 iterator->iterator->next = g_list_prepend (iterator->iterator->next, data);
168 else
169 iterator->iterator = g_list_append (iterator->iterator, data);
170 iterator->iterator = iterator->iterator->next;
171 }
172 e_list_invalidate_iterators (iterator->list, E_ITERATOR (iterator));
173 } else {
174 if (before) {
175 iterator->list->list = g_list_append (iterator->list->list, data);
176 iterator->iterator = g_list_last (iterator->list->list);
177 } else {
178 iterator->list->list = g_list_prepend (iterator->list->list, data);
179 iterator->iterator = iterator->list->list;
180 }
181 e_list_invalidate_iterators (iterator->list, E_ITERATOR (iterator));
182 }
183 }
184
185 static void
e_list_iterator_remove(EIterator * _iterator)186 e_list_iterator_remove (EIterator *_iterator)
187 {
188 EListIterator *iterator = E_LIST_ITERATOR (_iterator);
189 if (iterator->iterator) {
190 e_list_remove_link (iterator->list, iterator->iterator);
191 }
192 }
193
194 static void
e_list_iterator_set(EIterator * _iterator,gconstpointer object)195 e_list_iterator_set (EIterator *_iterator,
196 gconstpointer object)
197 {
198 EListIterator *iterator = E_LIST_ITERATOR (_iterator);
199 if (iterator->iterator) {
200 if (iterator->list->free)
201 iterator->list->free (iterator->iterator->data, iterator->list->closure);
202 if (iterator->list->copy)
203 iterator->iterator->data = iterator->list->copy (object, iterator->list->closure);
204 else
205 iterator->iterator->data = (gpointer) object;
206 }
207 }
208
209 static gboolean
e_list_iterator_is_valid(EIterator * _iterator)210 e_list_iterator_is_valid (EIterator *_iterator)
211 {
212 EListIterator *iterator = E_LIST_ITERATOR (_iterator);
213 return iterator->iterator != NULL;
214 }
215
216 static void
e_list_iterator_invalidate(EIterator * _iterator)217 e_list_iterator_invalidate (EIterator *_iterator)
218 {
219 EListIterator *iterator = E_LIST_ITERATOR (_iterator);
220 iterator->iterator = NULL;
221 }
222