1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org) 3 * (C) 1999 Antti Koivisto (koivisto@kde.org) 4 * (C) 2000 Dirk Mueller (mueller@kde.org) 5 * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved. 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 * You should have received a copy of the GNU Library General Public License 18 * along with this library; see the file COPYING.LIB. If not, write to 19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20 * Boston, MA 02110-1301, USA. 21 * 22 */ 23 24 #ifndef HTMLLabelElement_h 25 #define HTMLLabelElement_h 26 27 #include "core/html/FormAssociatedElement.h" 28 #include "core/html/HTMLElement.h" 29 #include "core/html/LabelableElement.h" 30 31 namespace blink { 32 33 class HTMLLabelElement FINAL : public HTMLElement, public FormAssociatedElement { 34 DEFINE_WRAPPERTYPEINFO(); 35 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(HTMLLabelElement); 36 public: 37 static PassRefPtrWillBeRawPtr<HTMLLabelElement> create(Document&, HTMLFormElement*); 38 LabelableElement* control() const; 39 40 virtual bool willRespondToMouseClickEvents() OVERRIDE; 41 42 virtual void trace(Visitor*) OVERRIDE; 43 44 virtual HTMLFormElement* formOwner() const OVERRIDE; 45 46 47 #if !ENABLE(OILPAN) 48 using Node::ref; 49 using Node::deref; 50 #endif 51 52 private: 53 explicit HTMLLabelElement(Document&, HTMLFormElement*); 54 bool isInInteractiveContent(Node*) const; 55 56 virtual bool rendererIsFocusable() const OVERRIDE; 57 virtual bool isInteractiveContent() const OVERRIDE; 58 virtual void accessKeyAction(bool sendMouseEvents) OVERRIDE; 59 60 virtual void attributeWillChange(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue) OVERRIDE; 61 virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE; 62 virtual void removedFrom(ContainerNode*) OVERRIDE; 63 64 // Overridden to update the hover/active state of the corresponding control. 65 virtual void setActive(bool = true) OVERRIDE; 66 virtual void setHovered(bool = true) OVERRIDE; 67 68 // Overridden to either click() or focus() the corresponding control. 69 virtual void defaultEventHandler(Event*) OVERRIDE; 70 71 virtual void focus(bool restorePreviousSelection, FocusType) OVERRIDE; 72 73 // FormAssociatedElement methods isFormControlElement()74 virtual bool isFormControlElement() const OVERRIDE { return false; } isEnumeratable()75 virtual bool isEnumeratable() const OVERRIDE { return false; } isLabelElement()76 virtual bool isLabelElement() const OVERRIDE { return true; } 77 #if !ENABLE(OILPAN) refFormAssociatedElement()78 virtual void refFormAssociatedElement() OVERRIDE { ref(); } derefFormAssociatedElement()79 virtual void derefFormAssociatedElement() OVERRIDE { deref(); } 80 #endif 81 82 virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE; 83 84 void updateLabel(TreeScope&, const AtomicString& oldForAttributeValue, const AtomicString& newForAttributeValue); 85 }; 86 87 88 template<typename T> inline const T& toElement(const FormAssociatedElement&); 89 template<typename T> inline const T* toElement(const FormAssociatedElement*); 90 // Make toHTMLLabelElement() accept a FormAssociatedElement as input instead of a Node. 91 template<> inline const HTMLLabelElement* toElement<HTMLLabelElement>(const FormAssociatedElement* element) 92 { 93 const HTMLLabelElement* labelElement = static_cast<const HTMLLabelElement*>(element); 94 // FormAssociatedElement doesn't have hasTagName, hence check for assert. 95 ASSERT_WITH_SECURITY_IMPLICATION(!labelElement || labelElement->hasTagName(HTMLNames::labelTag)); 96 return labelElement; 97 } 98 99 template<> inline const HTMLLabelElement& toElement<HTMLLabelElement>(const FormAssociatedElement& element) 100 { 101 const HTMLLabelElement& labelElement = static_cast<const HTMLLabelElement&>(element); 102 // FormAssociatedElement doesn't have hasTagName, hence check for assert. 103 ASSERT_WITH_SECURITY_IMPLICATION(labelElement.hasTagName(HTMLNames::labelTag)); 104 return labelElement; 105 } 106 107 } // namespace blink 108 109 #endif // HTMLLabelElement_h 110