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      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, 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<EventTarget> 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<EventTarget> 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() ? relatedTarget()->toNode() : 0;
    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() ? relatedTarget()->toNode() : 0;
    114 
    115     return target() ? target()->toNode() : 0;
    116 }
    117 
    118 } // namespace WebCore
    119