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      1 /*
      2  * Copyright 2008, The Android Open Source Project
      3  * Copyright (C) 2012 Research In Motion Limited. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *  * Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  *  * Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include "config.h"
     28 
     29 #include "core/events/TouchEvent.h"
     30 
     31 #include "core/events/EventDispatcher.h"
     32 #include "core/frame/FrameConsole.h"
     33 #include "core/frame/LocalFrame.h"
     34 
     35 namespace WebCore {
     36 
     37 TouchEvent::TouchEvent()
     38 {
     39     ScriptWrappable::init(this);
     40 }
     41 
     42 TouchEvent::TouchEvent(TouchList* touches, TouchList* targetTouches,
     43         TouchList* changedTouches, const AtomicString& type,
     44         PassRefPtrWillBeRawPtr<AbstractView> view,
     45         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool cancelable)
     46     : UIEventWithKeyState(type, true, cancelable, view, 0,
     47                         ctrlKey, altKey, shiftKey, metaKey)
     48     , m_touches(touches)
     49     , m_targetTouches(targetTouches)
     50     , m_changedTouches(changedTouches)
     51 {
     52     ScriptWrappable::init(this);
     53 }
     54 
     55 TouchEvent::~TouchEvent()
     56 {
     57 }
     58 
     59 void TouchEvent::initTouchEvent(TouchList* touches, TouchList* targetTouches,
     60         TouchList* changedTouches, const AtomicString& type,
     61         PassRefPtrWillBeRawPtr<AbstractView> view,
     62         int, int, int, int,
     63         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
     64 {
     65     if (dispatched())
     66         return;
     67 
     68     bool cancelable = true;
     69     if (type == EventTypeNames::touchcancel)
     70         cancelable = false;
     71 
     72     initUIEvent(type, true, cancelable, view, 0);
     73 
     74     m_touches = touches;
     75     m_targetTouches = targetTouches;
     76     m_changedTouches = changedTouches;
     77     m_ctrlKey = ctrlKey;
     78     m_altKey = altKey;
     79     m_shiftKey = shiftKey;
     80     m_metaKey = metaKey;
     81 }
     82 
     83 const AtomicString& TouchEvent::interfaceName() const
     84 {
     85     return EventNames::TouchEvent;
     86 }
     87 
     88 bool TouchEvent::isTouchEvent() const
     89 {
     90     return true;
     91 }
     92 
     93 void TouchEvent::preventDefault()
     94 {
     95     UIEventWithKeyState::preventDefault();
     96 
     97     // A common developer error is to wait too long before attempting to stop
     98     // scrolling by consuming a touchmove event. Generate a warning if this
     99     // event is uncancelable.
    100     if (!cancelable() && view() && view()->frame()) {
    101         view()->frame()->console().addMessage(JSMessageSource, WarningMessageLevel,
    102             "Ignored attempt to cancel a " + type() + " event with cancelable=false, for example because scrolling is in progress and cannot be interrupted.");
    103     }
    104 }
    105 void TouchEvent::trace(Visitor* visitor)
    106 {
    107     visitor->trace(m_touches);
    108     visitor->trace(m_targetTouches);
    109     visitor->trace(m_changedTouches);
    110     UIEventWithKeyState::trace(visitor);
    111 }
    112 
    113 PassRefPtrWillBeRawPtr<TouchEventDispatchMediator> TouchEventDispatchMediator::create(PassRefPtrWillBeRawPtr<TouchEvent> touchEvent)
    114 {
    115     return adoptRefWillBeNoop(new TouchEventDispatchMediator(touchEvent));
    116 }
    117 
    118 TouchEventDispatchMediator::TouchEventDispatchMediator(PassRefPtrWillBeRawPtr<TouchEvent> touchEvent)
    119     : EventDispatchMediator(touchEvent)
    120 {
    121 }
    122 
    123 TouchEvent* TouchEventDispatchMediator::event() const
    124 {
    125     return toTouchEvent(EventDispatchMediator::event());
    126 }
    127 
    128 bool TouchEventDispatchMediator::dispatchEvent(EventDispatcher* dispatcher) const
    129 {
    130     event()->eventPath().adjustForTouchEvent(dispatcher->node(), *event());
    131     return dispatcher->dispatch();
    132 }
    133 
    134 } // namespace WebCore
    135