Home | History | Annotate | Download | only in html 
      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 "core/html/HTMLLegendElement.h"
     27 
     28 #include "HTMLNames.h"
     29 #include "core/dom/ElementTraversal.h"
     30 #include "core/html/HTMLFieldSetElement.h"
     31 #include "core/html/HTMLFormControlElement.h"
     32 
     33 namespace WebCore {
     34 
     35 using namespace HTMLNames;
     36 
     37 
     38 inline HTMLLegendElement::HTMLLegendElement(Document& document)
     39     : HTMLElement(legendTag, document)
     40 {
     41     ScriptWrappable::init(this);
     42 }
     43 
     44 PassRefPtr<HTMLLegendElement> HTMLLegendElement::create(Document& document)
     45 {
     46     return adoptRef(new HTMLLegendElement(document));
     47 }
     48 
     49 HTMLFormControlElement* HTMLLegendElement::associatedControl()
     50 {
     51     // Check if there's a fieldset belonging to this legend.
     52     Element* fieldset = parentElement();
     53     while (fieldset && !fieldset->hasTagName(fieldsetTag))
     54         fieldset = fieldset->parentElement();
     55     if (!fieldset)
     56         return 0;
     57 
     58     // Find first form element inside the fieldset that is not a legend element.
     59     // FIXME: Should we consider tabindex?
     60     Element* element = fieldset;
     61     while ((element = ElementTraversal::next(*element, fieldset))) {
     62         if (element->isFormControlElement())
     63             return toHTMLFormControlElement(element);
     64     }
     65 
     66     return 0;
     67 }
     68 
     69 void HTMLLegendElement::focus(bool, FocusDirection direction)
     70 {
     71     if (isFocusable())
     72         Element::focus(true, direction);
     73 
     74     // To match other browsers' behavior, never restore previous selection.
     75     if (HTMLFormControlElement* control = associatedControl())
     76         control->focus(false, direction);
     77 }
     78 
     79 void HTMLLegendElement::accessKeyAction(bool sendMouseEvents)
     80 {
     81     if (HTMLFormControlElement* control = associatedControl())
     82         control->accessKeyAction(sendMouseEvents);
     83 }
     84 
     85 HTMLFormElement* HTMLLegendElement::form() const
     86 {
     87     // According to the specification, If the legend has a fieldset element as
     88     // its parent, then the form attribute must return the same value as the
     89     // form attribute on that fieldset element. Otherwise, it must return null.
     90     ContainerNode* fieldset = parentNode();
     91     if (!fieldset || !fieldset->hasTagName(fieldsetTag))
     92         return 0;
     93 
     94     return toHTMLFieldSetElement(fieldset)->formOwner();
     95 }
     96 
     97 } // namespace
     98