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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, 2004, 2005, 2006 Apple Computer, Inc.
      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 MouseRelatedEvent_h
     25 #define MouseRelatedEvent_h
     26 
     27 #include "IntPoint.h"
     28 #include "UIEventWithKeyState.h"
     29 
     30 namespace WebCore {
     31 
     32     // Internal only: Helper class for what's common between mouse and wheel events.
     33     class MouseRelatedEvent : public UIEventWithKeyState {
     34     public:
     35         // Note that these values are adjusted to counter the effects of zoom, so that values
     36         // exposed via DOM APIs are invariant under zooming.
     37         int screenX() const { return m_screenX; }
     38         int screenY() const { return m_screenY; }
     39         int clientX() const { return m_clientX; }
     40         int clientY() const { return m_clientY; }
     41         int layerX();
     42         int layerY();
     43         int offsetX();
     44         int offsetY();
     45         bool isSimulated() const { return m_isSimulated; }
     46         virtual int pageX() const;
     47         virtual int pageY() const;
     48         int x() const;
     49         int y() const;
     50 
     51         // Page point in "absolute" coordinates (i.e. post-zoomed, page-relative coords,
     52         // usable with RenderObject::absoluteToLocal).
     53         IntPoint absoluteLocation() const { return m_absoluteLocation; }
     54         void setAbsoluteLocation(const IntPoint& p) { m_absoluteLocation = p; }
     55 
     56     protected:
     57         MouseRelatedEvent();
     58         MouseRelatedEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<AbstractView>,
     59                           int detail, int screenX, int screenY, int pageX, int pageY,
     60                           bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool isSimulated = false);
     61 
     62         void initCoordinates();
     63         void initCoordinates(int clientX, int clientY);
     64         virtual void receivedTarget();
     65 
     66         void computePageLocation();
     67         void computeRelativePosition();
     68 
     69         // Expose these so MouseEvent::initMouseEvent can set them.
     70         int m_screenX;
     71         int m_screenY;
     72         int m_clientX;
     73         int m_clientY;
     74 
     75     private:
     76         int m_pageX;
     77         int m_pageY;
     78         int m_layerX;
     79         int m_layerY;
     80         int m_offsetX;
     81         int m_offsetY;
     82         IntPoint m_absoluteLocation;
     83         bool m_isSimulated;
     84         bool m_hasCachedRelativePosition;
     85     };
     86 
     87 } // namespace WebCore
     88 
     89 #endif // MouseRelatedEvent_h
     90