1 /* 2 * Copyright (C) 2001 Peter Kelly (pmk (at) post.com) 3 * Copyright (C) 2001 Tobias Anton (anton (at) stud.fbi.fh-darmstadt.de) 4 * Copyright (C) 2006 Samuel Weinig (sam.weinig (at) gmail.com) 5 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 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 Event_h 25 #define Event_h 26 27 #include "bindings/v8/ScriptWrappable.h" 28 #include "core/dom/DOMTimeStamp.h" 29 #include "core/events/EventPath.h" 30 #include "platform/heap/Handle.h" 31 #include "wtf/RefCounted.h" 32 #include "wtf/text/AtomicString.h" 33 34 namespace WebCore { 35 36 class EventTarget; 37 class EventDispatcher; 38 class ExecutionContext; 39 40 struct EventInit { 41 STACK_ALLOCATED(); 42 public: 43 EventInit(); 44 45 bool bubbles; 46 bool cancelable; 47 }; 48 49 class Event : public RefCountedWillBeGarbageCollectedFinalized<Event>, public ScriptWrappable { 50 public: 51 enum PhaseType { 52 NONE = 0, 53 CAPTURING_PHASE = 1, 54 AT_TARGET = 2, 55 BUBBLING_PHASE = 3 56 }; 57 58 enum EventType { 59 MOUSEDOWN = 1, 60 MOUSEUP = 2, 61 MOUSEOVER = 4, 62 MOUSEOUT = 8, 63 MOUSEMOVE = 16, 64 MOUSEDRAG = 32, 65 CLICK = 64, 66 DBLCLICK = 128, 67 KEYDOWN = 256, 68 KEYUP = 512, 69 KEYPRESS = 1024, 70 DRAGDROP = 2048, 71 FOCUS = 4096, 72 BLUR = 8192, 73 SELECT = 16384, 74 CHANGE = 32768 75 }; 76 77 static PassRefPtrWillBeRawPtr<Event> create() 78 { 79 return adoptRefWillBeNoop(new Event); 80 } 81 82 // A factory for a simple event. The event doesn't bubble, and isn't 83 // cancelable. 84 // http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#fire-a-simple-event 85 static PassRefPtrWillBeRawPtr<Event> create(const AtomicString& type) 86 { 87 return adoptRefWillBeNoop(new Event(type, false, false)); 88 } 89 static PassRefPtrWillBeRawPtr<Event> createCancelable(const AtomicString& type) 90 { 91 return adoptRefWillBeNoop(new Event(type, false, true)); 92 } 93 static PassRefPtrWillBeRawPtr<Event> createBubble(const AtomicString& type) 94 { 95 return adoptRefWillBeNoop(new Event(type, true, false)); 96 } 97 static PassRefPtrWillBeRawPtr<Event> createCancelableBubble(const AtomicString& type) 98 { 99 return adoptRefWillBeNoop(new Event(type, true, true)); 100 } 101 102 static PassRefPtrWillBeRawPtr<Event> create(const AtomicString& type, const EventInit& initializer) 103 { 104 return adoptRefWillBeNoop(new Event(type, initializer)); 105 } 106 107 virtual ~Event(); 108 109 void initEvent(const AtomicString& type, bool canBubble, bool cancelable); 110 111 const AtomicString& type() const { return m_type; } 112 void setType(const AtomicString& type) { m_type = type; } 113 114 EventTarget* target() const { return m_target.get(); } 115 void setTarget(PassRefPtrWillBeRawPtr<EventTarget>); 116 117 EventTarget* currentTarget() const; 118 void setCurrentTarget(EventTarget* currentTarget) { m_currentTarget = currentTarget; } 119 120 unsigned short eventPhase() const { return m_eventPhase; } 121 void setEventPhase(unsigned short eventPhase) { m_eventPhase = eventPhase; } 122 123 bool bubbles() const { return m_canBubble; } 124 bool cancelable() const { return m_cancelable; } 125 DOMTimeStamp timeStamp() const { return m_createTime; } 126 127 void stopPropagation() { m_propagationStopped = true; } 128 void stopImmediatePropagation() { m_immediatePropagationStopped = true; } 129 130 // IE Extensions 131 EventTarget* srcElement() const { return target(); } // MSIE extension - "the object that fired the event" 132 133 bool legacyReturnValue(ExecutionContext*) const; 134 void setLegacyReturnValue(ExecutionContext*, bool returnValue); 135 136 virtual const AtomicString& interfaceName() const; 137 bool hasInterface(const AtomicString&) const; 138 139 // These events are general classes of events. 140 virtual bool isUIEvent() const; 141 virtual bool isMouseEvent() const; 142 virtual bool isFocusEvent() const; 143 virtual bool isKeyboardEvent() const; 144 virtual bool isTouchEvent() const; 145 virtual bool isGestureEvent() const; 146 virtual bool isWheelEvent() const; 147 148 // Drag events are a subset of mouse events. 149 virtual bool isDragEvent() const; 150 151 // These events lack a DOM interface. 152 virtual bool isClipboardEvent() const; 153 virtual bool isBeforeTextInsertedEvent() const; 154 155 virtual bool isBeforeUnloadEvent() const; 156 157 bool propagationStopped() const { return m_propagationStopped || m_immediatePropagationStopped; } 158 bool immediatePropagationStopped() const { return m_immediatePropagationStopped; } 159 160 bool defaultPrevented() const { return m_defaultPrevented; } 161 virtual void preventDefault() 162 { 163 if (m_cancelable) 164 m_defaultPrevented = true; 165 } 166 void setDefaultPrevented(bool defaultPrevented) { m_defaultPrevented = defaultPrevented; } 167 168 bool defaultHandled() const { return m_defaultHandled; } 169 void setDefaultHandled() { m_defaultHandled = true; } 170 171 bool cancelBubble() const { return m_cancelBubble; } 172 void setCancelBubble(bool cancel) { m_cancelBubble = cancel; } 173 174 Event* underlyingEvent() const { return m_underlyingEvent.get(); } 175 void setUnderlyingEvent(PassRefPtrWillBeRawPtr<Event>); 176 177 EventPath& eventPath() { ASSERT(m_eventPath); return *m_eventPath; } 178 EventPath& ensureEventPath(); 179 180 PassRefPtrWillBeRawPtr<StaticNodeList> path() const; 181 182 bool isBeingDispatched() const { return eventPhase(); } 183 184 virtual void trace(Visitor*); 185 186 protected: 187 Event(); 188 Event(const AtomicString& type, bool canBubble, bool cancelable); 189 Event(const AtomicString& type, const EventInit&); 190 191 virtual void receivedTarget(); 192 bool dispatched() const { return m_target; } 193 194 private: 195 AtomicString m_type; 196 bool m_canBubble; 197 bool m_cancelable; 198 199 bool m_propagationStopped; 200 bool m_immediatePropagationStopped; 201 bool m_defaultPrevented; 202 bool m_defaultHandled; 203 bool m_cancelBubble; 204 205 unsigned short m_eventPhase; 206 RawPtrWillBeMember<EventTarget> m_currentTarget; 207 RefPtrWillBeMember<EventTarget> m_target; 208 DOMTimeStamp m_createTime; 209 RefPtrWillBeMember<Event> m_underlyingEvent; 210 OwnPtrWillBeMember<EventPath> m_eventPath; 211 }; 212 213 #define DEFINE_EVENT_TYPE_CASTS(typeName) \ 214 DEFINE_TYPE_CASTS(typeName, Event, event, event->is##typeName(), event.is##typeName()) 215 216 } // namespace WebCore 217 218 #endif // Event_h 219
