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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  *           (C) 2001 Dirk Mueller (mueller (at) kde.org)
      5  * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
      6  *           (C) 2006 Alexey Proskuryakov (ap (at) nypop.com)
      7  *
      8  * This library is free software; you can redistribute it and/or
      9  * modify it under the terms of the GNU Library General Public
     10  * License as published by the Free Software Foundation; either
     11  * version 2 of the License, or (at your option) any later version.
     12  *
     13  * This library is distributed in the hope that it will be useful,
     14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     16  * Library General Public License for more details.
     17  *
     18  * You should have received a copy of the GNU Library General Public License
     19  * along with this library; see the file COPYING.LIB.  If not, write to
     20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     21  * Boston, MA 02110-1301, USA.
     22  *
     23  */
     24 
     25 #include "config.h"
     26 #include "HTMLLegendElement.h"
     27 
     28 #include "HTMLNames.h"
     29 #include <wtf/StdLibExtras.h>
     30 
     31 namespace WebCore {
     32 
     33 using namespace HTMLNames;
     34 
     35 inline HTMLLegendElement::HTMLLegendElement(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
     36     : HTMLFormControlElement(tagName, document, form)
     37 {
     38     ASSERT(hasTagName(legendTag));
     39 }
     40 
     41 PassRefPtr<HTMLLegendElement> HTMLLegendElement::create(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
     42 {
     43     return adoptRef(new HTMLLegendElement(tagName, document, form));
     44 }
     45 
     46 bool HTMLLegendElement::supportsFocus() const
     47 {
     48     return HTMLElement::supportsFocus();
     49 }
     50 
     51 const AtomicString& HTMLLegendElement::formControlType() const
     52 {
     53     DEFINE_STATIC_LOCAL(const AtomicString, legend, ("legend"));
     54     return legend;
     55 }
     56 
     57 HTMLFormControlElement* HTMLLegendElement::associatedControl()
     58 {
     59     // Check if there's a fieldset belonging to this legend.
     60     ContainerNode* fieldset = parentNode();
     61     while (fieldset && !fieldset->hasTagName(fieldsetTag))
     62         fieldset = fieldset->parentNode();
     63     if (!fieldset)
     64         return 0;
     65 
     66     // Find first form element inside the fieldset that is not a legend element.
     67     // FIXME: Should we consider tabindex?
     68     Node* node = fieldset;
     69     while ((node = node->traverseNextNode(fieldset))) {
     70         if (node->isElementNode()) {
     71             Element* element = static_cast<Element*>(node);
     72             if (!element->hasLocalName(legendTag) && element->isFormControlElement())
     73                 return static_cast<HTMLFormControlElement*>(element);
     74         }
     75     }
     76 
     77     return 0;
     78 }
     79 
     80 void HTMLLegendElement::focus(bool)
     81 {
     82     if (isFocusable())
     83         Element::focus();
     84 
     85     // To match other browsers' behavior, never restore previous selection.
     86     if (HTMLFormControlElement* control = associatedControl())
     87         control->focus(false);
     88 }
     89 
     90 void HTMLLegendElement::accessKeyAction(bool sendToAnyElement)
     91 {
     92     if (HTMLFormControlElement* control = associatedControl())
     93         control->accessKeyAction(sendToAnyElement);
     94 }
     95 
     96 } // namespace
     97