1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
4 * Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB.  If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 *
21 */
22
23#include "config.h"
24#include "HTMLNameCollection.h"
25
26#include "Element.h"
27#include "HTMLDocument.h"
28#include "HTMLNames.h"
29#include "HTMLObjectElement.h"
30
31namespace WebCore {
32
33using namespace HTMLNames;
34
35HTMLNameCollection::HTMLNameCollection(PassRefPtr<Document> document, CollectionType type, const String& name)
36    : HTMLCollection(document.get(), type, document->nameCollectionInfo(type, name))
37    , m_name(name)
38{
39}
40
41Element* HTMLNameCollection::itemAfter(Element* previous) const
42{
43    ASSERT(previous != base());
44
45    Node* current;
46    if (!previous)
47        current = base()->firstChild();
48    else
49        current = previous->traverseNextNode(base());
50
51    for (; current; current = current->traverseNextNode(base())) {
52        if (!current->isElementNode())
53            continue;
54        Element* e = static_cast<Element*>(current);
55        switch (type()) {
56            case WindowNamedItems:
57                // find only images, forms, applets, embeds and objects by name,
58                // but anything by id
59                if (e->hasTagName(imgTag) ||
60                    e->hasTagName(formTag) ||
61                    e->hasTagName(appletTag) ||
62                    e->hasTagName(embedTag) ||
63                    e->hasTagName(objectTag))
64                    if (e->getAttribute(nameAttr) == m_name)
65                        return e;
66                if (e->getIdAttribute() == m_name)
67                    return e;
68                break;
69            case DocumentNamedItems:
70                // find images, forms, applets, embeds, objects and iframes by name,
71                // applets and object by id, and images by id but only if they have
72                // a name attribute (this very strange rule matches IE)
73                if (e->hasTagName(formTag) || e->hasTagName(embedTag) || e->hasTagName(iframeTag)) {
74                    if (e->getAttribute(nameAttr) == m_name)
75                        return e;
76                } else if (e->hasTagName(appletTag)) {
77                    if (e->getAttribute(nameAttr) == m_name || e->getIdAttribute() == m_name)
78                        return e;
79                } else if (e->hasTagName(objectTag)) {
80                    if ((e->getAttribute(nameAttr) == m_name || e->getIdAttribute() == m_name)
81                            && static_cast<HTMLObjectElement*>(e)->isDocNamedItem())
82                        return e;
83                } else if (e->hasTagName(imgTag)) {
84                    if (e->getAttribute(nameAttr) == m_name || (e->getIdAttribute() == m_name && e->hasAttribute(nameAttr)))
85                        return e;
86                }
87                break;
88        default:
89            ASSERT_NOT_REACHED();
90        }
91    }
92
93    return 0;
94}
95
96}
97