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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) 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 
     31 namespace WebCore {
     32 
     33 using namespace HTMLNames;
     34 
     35 HTMLNameCollection::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 
     41 Element* 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