0706e81cb23f32197478caca3cfe5b1fb0b5f20b
[platform/framework/web/crosswalk.git] / src / third_party / WebKit / Source / core / html / HTMLNameCollection.cpp
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, 2011, 2012 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 "core/html/HTMLNameCollection.h"
25
26 #include "HTMLNames.h"
27 #include "core/dom/Element.h"
28 #include "core/dom/ElementTraversal.h"
29 #include "core/dom/NodeRareData.h"
30
31 namespace WebCore {
32
33 using namespace HTMLNames;
34
35 HTMLNameCollection::HTMLNameCollection(Node* document, CollectionType type, const AtomicString& name)
36     : HTMLCollection(document, type, OverridesItemAfter)
37     , m_name(name)
38 {
39 }
40
41 HTMLNameCollection::~HTMLNameCollection()
42 {
43     ASSERT(ownerNode());
44     ASSERT(ownerNode()->isDocumentNode());
45     ASSERT(type() == WindowNamedItems || type() == DocumentNamedItems);
46
47     ownerNode()->nodeLists()->removeCacheWithAtomicName(this, type(), m_name);
48 }
49
50 Element* HTMLNameCollection::virtualItemAfter(unsigned& offsetInArray, Element* previous) const
51 {
52     ASSERT_UNUSED(offsetInArray, !offsetInArray);
53     ASSERT(previous != ownerNode());
54
55     Element* current;
56     if (!previous)
57         current = ElementTraversal::firstWithin(ownerNode());
58     else
59         current = ElementTraversal::next(previous, ownerNode());
60
61     for (; current; current = ElementTraversal::next(current, ownerNode())) {
62         switch (type()) {
63         case WindowNamedItems:
64             // find only images, forms, applets, embeds and objects by name,
65             // but anything by id
66             if (current->hasTagName(imgTag)
67                 || current->hasTagName(formTag)
68                 || current->hasTagName(appletTag)
69                 || current->hasTagName(embedTag)
70                 || current->hasTagName(objectTag)) {
71                 if (current->getNameAttribute() == m_name)
72                     return current;
73             }
74             if (current->getIdAttribute() == m_name)
75                 return current;
76             break;
77         case DocumentNamedItems:
78             // find images, forms, applets, embeds, objects and iframes by name,
79             // applets and object by id, and images by id but only if they have
80             // a name attribute (this very strange rule matches IE)
81             if (current->hasTagName(formTag) || current->hasTagName(embedTag) || current->hasTagName(iframeTag)) {
82                 if (current->getNameAttribute() == m_name)
83                     return current;
84             } else if (current->hasTagName(appletTag) || current->hasTagName(objectTag)) {
85                 if (current->getNameAttribute() == m_name || current->getIdAttribute() == m_name)
86                     return current;
87             } else if (current->hasTagName(imgTag)) {
88                 if (current->getNameAttribute() == m_name || (current->getIdAttribute() == m_name && current->hasName()))
89                     return current;
90             }
91             break;
92         default:
93             ASSERT_NOT_REACHED();
94         }
95     }
96
97     return 0;
98 }
99
100 }