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      1 /*
      2  * Copyright 2008, The Android Open Source Project
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *  * Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  *  * Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 
     28 #include "core/dom/Touch.h"
     29 
     30 #include "core/frame/FrameView.h"
     31 #include "core/frame/LocalFrame.h"
     32 #include "platform/geometry/FloatPoint.h"
     33 
     34 namespace blink {
     35 
     36 static FloatPoint contentsOffset(LocalFrame* frame)
     37 {
     38     if (!frame)
     39         return FloatPoint();
     40     FrameView* frameView = frame->view();
     41     if (!frameView)
     42         return FloatPoint();
     43     float scale = 1.0f / frame->pageZoomFactor();
     44     return FloatPoint(frameView->scrollPosition()).scaledBy(scale);
     45 }
     46 
     47 Touch::Touch(LocalFrame* frame, EventTarget* target, unsigned identifier, const FloatPoint& screenPos, const FloatPoint& pagePos, const FloatSize& radius, float rotationAngle, float force)
     48     : m_target(target)
     49     , m_identifier(identifier)
     50     , m_clientPos(pagePos - contentsOffset(frame))
     51     , m_screenPos(screenPos)
     52     , m_pagePos(pagePos)
     53     , m_radius(radius)
     54     , m_rotationAngle(rotationAngle)
     55     , m_force(force)
     56 {
     57     float scaleFactor = frame ? frame->pageZoomFactor() : 1.0f;
     58     m_absoluteLocation = roundedLayoutPoint(pagePos.scaledBy(scaleFactor));
     59 }
     60 
     61 Touch::Touch(EventTarget* target, unsigned identifier, const FloatPoint& clientPos, const FloatPoint& screenPos, const FloatPoint& pagePos, const FloatSize& radius, float rotationAngle, float force, LayoutPoint absoluteLocation)
     62     : m_target(target)
     63     , m_identifier(identifier)
     64     , m_clientPos(clientPos)
     65     , m_screenPos(screenPos)
     66     , m_pagePos(pagePos)
     67     , m_radius(radius)
     68     , m_rotationAngle(rotationAngle)
     69     , m_force(force)
     70     , m_absoluteLocation(absoluteLocation)
     71 {
     72 }
     73 
     74 PassRefPtrWillBeRawPtr<Touch> Touch::cloneWithNewTarget(EventTarget* eventTarget) const
     75 {
     76     return adoptRefWillBeNoop(new Touch(eventTarget, m_identifier, m_clientPos, m_screenPos, m_pagePos, m_radius, m_rotationAngle, m_force, m_absoluteLocation));
     77 }
     78 
     79 void Touch::trace(Visitor* visitor)
     80 {
     81     visitor->trace(m_target);
     82 }
     83 
     84 } // namespace blink
     85