third_party/WebKit/Source/core/events/PointerEvent.cpp

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "config.h"
   6 #include "core/events/PointerEvent.h"
   7
   8 #include "core/dom/Element.h"
   9 #include "core/events/EventDispatcher.h"
  10
  11 namespace blink {
  12
  13 PointerEvent::PointerEvent()
  14     : m_pointerId(0)
  15     , m_width(0)
  16     , m_height(0)
  17     , m_pressure(0)
  18     , m_tiltX(0)
  19     , m_tiltY(0)
  20     , m_isPrimary(false)
  21 {
  22 }
  23
  24 PointerEvent::PointerEvent(const AtomicString& type, const PointerEventInit& initializer)
  25     : MouseEvent(type, initializer)
  26     , m_pointerId(0)
  27     , m_width(0)
  28     , m_height(0)
  29     , m_pressure(0)
  30     , m_tiltX(0)
  31     , m_tiltY(0)
  32     , m_isPrimary(false)
  33 {
  34     if (initializer.hasPointerId())
  35         m_pointerId = initializer.pointerId();
  36     if (initializer.hasWidth())
  37         m_width = initializer.width();
  38     if (initializer.hasHeight())
  39         m_height = initializer.height();
  40     if (initializer.hasPressure())
  41         m_pressure = initializer.pressure();
  42     if (initializer.hasTiltX())
  43         m_tiltX = initializer.tiltX();
  44     if (initializer.hasTiltY())
  45         m_tiltY = initializer.tiltY();
  46     if (initializer.hasPointerType())
  47         m_pointerType = initializer.pointerType();
  48     if (initializer.hasIsPrimary())
  49         m_isPrimary = initializer.isPrimary();
  50 }
  51
  52 bool PointerEvent::isMouseEvent() const
  53 {
  54     return false;
  55 }
  56
  57 bool PointerEvent::isPointerEvent() const
  58 {
  59     return true;
  60 }
  61
  62 PassRefPtrWillBeRawPtr<EventDispatchMediator> PointerEvent::createMediator()
  63 {
  64     return PointerEventDispatchMediator::create(this);
  65 }
  66
  67 DEFINE_TRACE(PointerEvent)
  68 {
  69     MouseEvent::trace(visitor);
  70 }
  71
  72 PassRefPtrWillBeRawPtr<PointerEventDispatchMediator> PointerEventDispatchMediator::create(PassRefPtrWillBeRawPtr<PointerEvent> pointerEvent)
  73 {
  74     return adoptRefWillBeNoop(new PointerEventDispatchMediator(pointerEvent));
  75 }
  76
  77 PointerEventDispatchMediator::PointerEventDispatchMediator(PassRefPtrWillBeRawPtr<PointerEvent> pointerEvent)
  78     : EventDispatchMediator(pointerEvent)
  79 {
  80 }
  81
  82 PointerEvent& PointerEventDispatchMediator::event() const
  83 {
  84     return toPointerEvent(EventDispatchMediator::event());
  85 }
  86
  87 bool PointerEventDispatchMediator::dispatchEvent(EventDispatcher& dispatcher) const
  88 {
  89     if (isDisabledFormControl(&dispatcher.node()))
  90         return false;
  91
  92     if (event().type().isEmpty())
  93         return true; // Shouldn't happen.
  94
  95     ASSERT(!event().target() || event().target() != event().relatedTarget());
  96
  97     EventTarget* relatedTarget = event().relatedTarget();
  98     event().eventPath().adjustForRelatedTarget(dispatcher.node(), relatedTarget);
  99
 100     dispatcher.dispatch();
 101     return !event().defaultHandled() && !event().defaultPrevented();
 102 }
 103
 104 } // namespace blink