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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/HTMLFieldSetElement.h"
     27 
     28 #include "core/HTMLNames.h"
     29 #include "core/dom/ElementTraversal.h"
     30 #include "core/html/HTMLCollection.h"
     31 #include "core/html/HTMLFormControlsCollection.h"
     32 #include "core/html/HTMLLegendElement.h"
     33 #include "core/html/HTMLObjectElement.h"
     34 #include "core/rendering/RenderFieldset.h"
     35 #include "wtf/StdLibExtras.h"
     36 
     37 namespace WebCore {
     38 
     39 using namespace HTMLNames;
     40 
     41 inline HTMLFieldSetElement::HTMLFieldSetElement(Document& document, HTMLFormElement* form)
     42     : HTMLFormControlElement(fieldsetTag, document, form)
     43     , m_documentVersion(0)
     44 {
     45     ScriptWrappable::init(this);
     46 }
     47 
     48 PassRefPtrWillBeRawPtr<HTMLFieldSetElement> HTMLFieldSetElement::create(Document& document, HTMLFormElement* form)
     49 {
     50     return adoptRefWillBeNoop(new HTMLFieldSetElement(document, form));
     51 }
     52 
     53 void HTMLFieldSetElement::trace(Visitor* visitor)
     54 {
     55 #if ENABLE(OILPAN)
     56     visitor->trace(m_associatedElements);
     57 #endif
     58     HTMLFormControlElement::trace(visitor);
     59 }
     60 
     61 void HTMLFieldSetElement::invalidateDisabledStateUnder(Element& base)
     62 {
     63     for (Element* element = ElementTraversal::firstWithin(base); element; element = ElementTraversal::next(*element, &base)) {
     64         if (element->isFormControlElement())
     65             toHTMLFormControlElement(element)->ancestorDisabledStateWasChanged();
     66     }
     67 }
     68 
     69 void HTMLFieldSetElement::disabledAttributeChanged()
     70 {
     71     // This element must be updated before the style of nodes in its subtree gets recalculated.
     72     HTMLFormControlElement::disabledAttributeChanged();
     73     invalidateDisabledStateUnder(*this);
     74 }
     75 
     76 void HTMLFieldSetElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
     77 {
     78     HTMLFormControlElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
     79     for (HTMLLegendElement* legend = Traversal<HTMLLegendElement>::firstChild(*this); legend; legend = Traversal<HTMLLegendElement>::nextSibling(*legend))
     80         invalidateDisabledStateUnder(*legend);
     81 }
     82 
     83 bool HTMLFieldSetElement::supportsFocus() const
     84 {
     85     return HTMLElement::supportsFocus();
     86 }
     87 
     88 const AtomicString& HTMLFieldSetElement::formControlType() const
     89 {
     90     DEFINE_STATIC_LOCAL(const AtomicString, fieldset, ("fieldset", AtomicString::ConstructFromLiteral));
     91     return fieldset;
     92 }
     93 
     94 RenderObject* HTMLFieldSetElement::createRenderer(RenderStyle*)
     95 {
     96     return new RenderFieldset(this);
     97 }
     98 
     99 HTMLLegendElement* HTMLFieldSetElement::legend() const
    100 {
    101     return Traversal<HTMLLegendElement>::firstChild(*this);
    102 }
    103 
    104 PassRefPtrWillBeRawPtr<HTMLFormControlsCollection> HTMLFieldSetElement::elements()
    105 {
    106     return toHTMLFormControlsCollection(ensureCachedHTMLCollection(FormControls).get());
    107 }
    108 
    109 void HTMLFieldSetElement::refreshElementsIfNeeded() const
    110 {
    111     uint64_t docVersion = document().domTreeVersion();
    112     if (m_documentVersion == docVersion)
    113         return;
    114 
    115     m_documentVersion = docVersion;
    116 
    117     m_associatedElements.clear();
    118 
    119     for (HTMLElement* element = Traversal<HTMLElement>::firstWithin(*this); element; element = Traversal<HTMLElement>::next(*element, this)) {
    120         if (isHTMLObjectElement(*element)) {
    121             m_associatedElements.append(toHTMLObjectElement(element));
    122             continue;
    123         }
    124 
    125         if (!element->isFormControlElement())
    126             continue;
    127 
    128         m_associatedElements.append(toHTMLFormControlElement(element));
    129     }
    130 }
    131 
    132 const FormAssociatedElement::List& HTMLFieldSetElement::associatedElements() const
    133 {
    134     refreshElementsIfNeeded();
    135     return m_associatedElements;
    136 }
    137 
    138 } // namespace
    139