1 /* 2 * Copyright (C) 2007, 2008 Nikolas Zimmermann <zimmermann (at) kde.org> 3 * Copyright (C) 2011 Torch Mobile (Beijing) Co. Ltd. All rights reserved. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 */ 20 21 #ifndef SVGElementInstance_h 22 #define SVGElementInstance_h 23 24 #include "bindings/v8/ScriptWrappable.h" 25 #include "core/dom/EventTarget.h" 26 #include "core/platform/TreeShared.h" 27 28 namespace WebCore { 29 30 namespace Private { 31 template<class GenericNode, class GenericNodeContainer> 32 void addChildNodesToDeletionQueue(GenericNode*& head, GenericNode*& tail, GenericNodeContainer* container); 33 }; 34 35 class Document; 36 class SVGElement; 37 class SVGElementInstanceList; 38 class SVGUseElement; 39 40 // SVGElementInstance mimics Node, but without providing all its functionality 41 class SVGElementInstance : public EventTarget, public ScriptWrappable, public TreeShared<SVGElementInstance> { 42 public: 43 static PassRefPtr<SVGElementInstance> create(SVGUseElement* correspondingUseElement, SVGUseElement* directUseElement, PassRefPtr<SVGElement> originalElement); 44 45 virtual ~SVGElementInstance(); 46 47 void setParentOrShadowHostNode(SVGElementInstance* instance) { m_parentInstance = instance; } 48 49 virtual const AtomicString& interfaceName() const; 50 virtual ScriptExecutionContext* scriptExecutionContext() const; 51 52 virtual bool addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture); 53 virtual bool removeEventListener(const AtomicString& eventType, EventListener*, bool useCapture); 54 virtual void removeAllEventListeners(); 55 56 using EventTarget::dispatchEvent; 57 virtual bool dispatchEvent(PassRefPtr<Event>) OVERRIDE; 58 59 SVGElement* correspondingElement() const { return m_element.get(); } 60 SVGUseElement* correspondingUseElement() const { return m_correspondingUseElement; } 61 SVGUseElement* directUseElement() const { return m_directUseElement; } 62 SVGElement* shadowTreeElement() const { return m_shadowTreeElement.get(); } 63 64 void detach(); 65 66 SVGElementInstance* parentNode() const { return m_parentInstance; } 67 PassRefPtr<SVGElementInstanceList> childNodes(); 68 69 SVGElementInstance* previousSibling() const { return m_previousSibling; } 70 SVGElementInstance* nextSibling() const { return m_nextSibling; } 71 72 SVGElementInstance* firstChild() const { return m_firstChild; } 73 SVGElementInstance* lastChild() const { return m_lastChild; } 74 75 inline Document* ownerDocument() const; 76 77 class InvalidationGuard { 78 WTF_MAKE_NONCOPYABLE(InvalidationGuard); 79 public: 80 InvalidationGuard(SVGElement* element) : m_element(element) { } 81 ~InvalidationGuard() { SVGElementInstance::invalidateAllInstancesOfElement(m_element); } 82 private: 83 SVGElement* m_element; 84 }; 85 86 class InstanceUpdateBlocker { 87 WTF_MAKE_NONCOPYABLE(InstanceUpdateBlocker); 88 public: 89 InstanceUpdateBlocker(SVGElement* targetElement); 90 ~InstanceUpdateBlocker(); 91 92 private: 93 SVGElement* m_targetElement; 94 }; 95 96 static void invalidateAllInstancesOfElement(SVGElement*); 97 98 using TreeShared<SVGElementInstance>::ref; 99 using TreeShared<SVGElementInstance>::deref; 100 101 // EventTarget API 102 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), abort); 103 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), blur); 104 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), change); 105 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), click); 106 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), contextmenu); 107 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), dblclick); 108 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), error); 109 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), focus); 110 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), input); 111 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), keydown); 112 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), keypress); 113 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), keyup); 114 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), load); 115 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), mousedown); 116 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), mouseenter); 117 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), mouseleave); 118 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), mousemove); 119 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), mouseout); 120 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), mouseover); 121 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), mouseup); 122 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), mousewheel); 123 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), beforecut); 124 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), cut); 125 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), beforecopy); 126 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), copy); 127 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), beforepaste); 128 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), paste); 129 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), dragenter); 130 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), dragover); 131 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), dragleave); 132 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), drop); 133 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), dragstart); 134 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), drag); 135 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), dragend); 136 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), reset); 137 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), resize); 138 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), scroll); 139 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), search); 140 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), select); 141 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), selectstart); 142 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), submit); 143 DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(correspondingElement(), unload); 144 145 private: 146 friend class SVGUseElement; 147 friend class TreeShared<SVGElementInstance>; 148 149 SVGElementInstance(SVGUseElement*, SVGUseElement*, PassRefPtr<SVGElement> originalElement); 150 151 void removedLastRef(); 152 bool hasTreeSharedParent() const { return !!m_parentInstance; } 153 154 virtual Node* toNode(); 155 156 void appendChild(PassRefPtr<SVGElementInstance> child); 157 void setShadowTreeElement(SVGElement*); 158 159 template<class GenericNode, class GenericNodeContainer> 160 friend void appendChildToContainer(GenericNode* child, GenericNodeContainer* container); 161 162 template<class GenericNode, class GenericNodeContainer> 163 friend void removeDetachedChildrenInContainer(GenericNodeContainer*); 164 165 template<class GenericNode, class GenericNodeContainer> 166 friend void Private::addChildNodesToDeletionQueue(GenericNode*& head, GenericNode*& tail, GenericNodeContainer* container); 167 168 bool hasChildNodes() const { return m_firstChild; } 169 170 void setFirstChild(SVGElementInstance* child) { m_firstChild = child; } 171 void setLastChild(SVGElementInstance* child) { m_lastChild = child; } 172 173 void setNextSibling(SVGElementInstance* sibling) { m_nextSibling = sibling; } 174 void setPreviousSibling(SVGElementInstance* sibling) { m_previousSibling = sibling; } 175 176 virtual void refEventTarget() { ref(); } 177 virtual void derefEventTarget() { deref(); } 178 virtual EventTargetData* eventTargetData(); 179 virtual EventTargetData* ensureEventTargetData(); 180 181 SVGElementInstance* m_parentInstance; 182 183 SVGUseElement* m_correspondingUseElement; 184 SVGUseElement* m_directUseElement; 185 RefPtr<SVGElement> m_element; 186 RefPtr<SVGElement> m_shadowTreeElement; 187 188 SVGElementInstance* m_previousSibling; 189 SVGElementInstance* m_nextSibling; 190 191 SVGElementInstance* m_firstChild; 192 SVGElementInstance* m_lastChild; 193 }; 194 195 } // namespace WebCore 196 197 #endif 198