WebCore/dom/MouseEvent.cpp

   1 /*
   2  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
   3  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
   4  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
   5  * Copyright (C) 2003, 2005, 2006, 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 #include "config.h"
  24 #include "MouseEvent.h"
  25
  26 #include "EventNames.h"
  27
  28 namespace WebCore {
  29
  30 MouseEvent::MouseEvent()
  31     : m_button(0)
  32     , m_buttonDown(false)
  33 {
  34 }
  35
  36 MouseEvent::MouseEvent(const AtomicString& eventType, bool canBubble, bool cancelable, PassRefPtr<AbstractView> view,
  37                        int detail, int screenX, int screenY, int pageX, int pageY,
  38                        bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
  39                        unsigned short button, PassRefPtr<EventTargetNode> relatedTarget,
  40                        PassRefPtr<Clipboard> clipboard, bool isSimulated)
  41     : MouseRelatedEvent(eventType, canBubble, cancelable, view, detail, screenX, screenY,
  42                         pageX, pageY, ctrlKey, altKey, shiftKey, metaKey, isSimulated)
  43     , m_button(button == (unsigned short)-1 ? 0 : button)
  44     , m_buttonDown(button != (unsigned short)-1)
  45     , m_relatedTarget(relatedTarget)
  46     , m_clipboard(clipboard)
  47 {
  48 }
  49
  50 MouseEvent::~MouseEvent()
  51 {
  52 }
  53
  54 void MouseEvent::initMouseEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<AbstractView> view,
  55                                 int detail, int screenX, int screenY, int clientX, int clientY,
  56                                 bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
  57                                 unsigned short button, PassRefPtr<EventTargetNode> relatedTarget)
  58 {
  59     if (dispatched())
  60         return;
  61
  62     initUIEvent(type, canBubble, cancelable, view, detail);
  63
  64     m_screenX = screenX;
  65     m_screenY = screenY;
  66     m_ctrlKey = ctrlKey;
  67     m_altKey = altKey;
  68     m_shiftKey = shiftKey;
  69     m_metaKey = metaKey;
  70     m_button = button == (unsigned short)-1 ? 0 : button;
  71     m_buttonDown = button != (unsigned short)-1;
  72     m_relatedTarget = relatedTarget;
  73
  74     initCoordinates(clientX, clientY);
  75
  76     // FIXME: m_isSimulated is not set to false here.
  77     // FIXME: m_clipboard is not set to 0 here.
  78 }
  79
  80 bool MouseEvent::isMouseEvent() const
  81 {
  82     return true;
  83 }
  84
  85 bool MouseEvent::isDragEvent() const
  86 {
  87     const AtomicString& t = type();
  88     return t == eventNames().dragenterEvent || t == eventNames().dragoverEvent || t == eventNames().dragleaveEvent || t == eventNames().dropEvent
  89                || t == eventNames().dragstartEvent|| t == eventNames().dragEvent || t == eventNames().dragendEvent;
  90 }
  91
  92 int MouseEvent::which() const
  93 {
  94     // For the DOM, the return values for left, middle and right mouse buttons are 0, 1, 2, respectively.
  95     // For the Netscape "which" property, the return values for left, middle and right mouse buttons are 1, 2, 3, respectively.
  96     // So we must add 1.
  97     return m_button + 1;
  98 }
  99
 100 Node* MouseEvent::toElement() const
 101 {
 102     // MSIE extension - "the object toward which the user is moving the mouse pointer"
 103     if (type() == eventNames().mouseoutEvent)
 104         return relatedTarget();
 105
 106     return target() ? target()->toNode() : 0;
 107 }
 108
 109 Node* MouseEvent::fromElement() const
 110 {
 111     // MSIE extension - "object from which activation or the mouse pointer is exiting during the event" (huh?)
 112     if (type() != eventNames().mouseoutEvent)
 113         return relatedTarget();
 114
 115     return target() ? target()->toNode() : 0;
 116 }
 117
 118 } // namespace WebCore