third_party/WebKit/Source/core/html/HTMLLegendElement.cpp

   1 /*
   2  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
   3  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
   4  *           (C) 2001 Dirk Mueller (mueller@kde.org)
   5  * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
   6  *           (C) 2006 Alexey Proskuryakov (ap@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 nullptr;
  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, WebFocusType type, InputDeviceCapabilities* sourceCapabilities)
  58 {
  59     if (isFocusable())
  60         Element::focus(true, type, sourceCapabilities);
  61
  62     // To match other browsers' behavior, never restore previous selection.
  63     if (HTMLFormControlElement* control = associatedControl())
  64         control->focus(false, type, sourceCapabilities);
  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 nullptr;
  81
  82     return toHTMLFieldSetElement(fieldset)->formOwner();
  83 }
  84
  85 } // namespace