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 "HTMLNames.h" 29 #include "core/dom/NodeTraversal.h" 30 #include "core/html/HTMLCollection.h" 31 #include "core/html/HTMLLegendElement.h" 32 #include "core/html/HTMLObjectElement.h" 33 #include "core/rendering/RenderFieldset.h" 34 #include "wtf/StdLibExtras.h" 35 36 namespace WebCore { 37 38 using namespace HTMLNames; 39 40 inline HTMLFieldSetElement::HTMLFieldSetElement(const QualifiedName& tagName, Document* document, HTMLFormElement* form) 41 : HTMLFormControlElement(tagName, document, form) 42 , m_documentVersion(0) 43 { 44 ASSERT(hasTagName(fieldsetTag)); 45 ScriptWrappable::init(this); 46 } 47 48 PassRefPtr<HTMLFieldSetElement> HTMLFieldSetElement::create(const QualifiedName& tagName, Document* document, HTMLFormElement* form) 49 { 50 return adoptRef(new HTMLFieldSetElement(tagName, document, form)); 51 } 52 53 void HTMLFieldSetElement::invalidateDisabledStateUnder(Element* base) 54 { 55 for (Element* element = ElementTraversal::firstWithin(base); element; element = ElementTraversal::next(element, base)) { 56 if (element->isFormControlElement()) 57 toHTMLFormControlElement(element)->ancestorDisabledStateWasChanged(); 58 } 59 } 60 61 void HTMLFieldSetElement::disabledAttributeChanged() 62 { 63 // This element must be updated before the style of nodes in its subtree gets recalculated. 64 HTMLFormControlElement::disabledAttributeChanged(); 65 invalidateDisabledStateUnder(this); 66 } 67 68 void HTMLFieldSetElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) 69 { 70 HTMLFormControlElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta); 71 for (Element* element = ElementTraversal::firstWithin(this); element; element = ElementTraversal::nextSkippingChildren(element, this)) { 72 if (element->hasTagName(legendTag)) 73 invalidateDisabledStateUnder(element); 74 } 75 } 76 77 bool HTMLFieldSetElement::supportsFocus() const 78 { 79 return HTMLElement::supportsFocus(); 80 } 81 82 const AtomicString& HTMLFieldSetElement::formControlType() const 83 { 84 DEFINE_STATIC_LOCAL(const AtomicString, fieldset, ("fieldset", AtomicString::ConstructFromLiteral)); 85 return fieldset; 86 } 87 88 RenderObject* HTMLFieldSetElement::createRenderer(RenderStyle*) 89 { 90 return new RenderFieldset(this); 91 } 92 93 HTMLLegendElement* HTMLFieldSetElement::legend() const 94 { 95 for (Element* child = ElementTraversal::firstWithin(this); child; child = ElementTraversal::nextSkippingChildren(child, this)) { 96 if (child->hasTagName(legendTag)) 97 return static_cast<HTMLLegendElement*>(child); 98 } 99 return 0; 100 } 101 102 PassRefPtr<HTMLCollection> HTMLFieldSetElement::elements() 103 { 104 return ensureCachedHTMLCollection(FormControls); 105 } 106 107 void HTMLFieldSetElement::refreshElementsIfNeeded() const 108 { 109 uint64_t docVersion = document()->domTreeVersion(); 110 if (m_documentVersion == docVersion) 111 return; 112 113 m_documentVersion = docVersion; 114 115 m_associatedElements.clear(); 116 117 for (Element* element = ElementTraversal::firstWithin(this); element; element = ElementTraversal::next(element, this)) { 118 if (element->hasTagName(objectTag)) { 119 m_associatedElements.append(static_cast<HTMLObjectElement*>(element)); 120 continue; 121 } 122 123 if (!element->isFormControlElement()) 124 continue; 125 126 m_associatedElements.append(toHTMLFormControlElement(element)); 127 } 128 } 129 130 const Vector<FormAssociatedElement*>& HTMLFieldSetElement::associatedElements() const 131 { 132 refreshElementsIfNeeded(); 133 return m_associatedElements; 134 } 135 136 unsigned HTMLFieldSetElement::length() const 137 { 138 refreshElementsIfNeeded(); 139 unsigned len = 0; 140 for (unsigned i = 0; i < m_associatedElements.size(); ++i) 141 if (m_associatedElements[i]->isEnumeratable()) 142 ++len; 143 return len; 144 } 145 146 } // namespace 147