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