DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (a3a081ae714f)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/dom/Touch.h"

#include "mozilla/dom/EventTarget.h"
#include "mozilla/dom/TouchEvent.h"
#include "nsGlobalWindow.h"
#include "nsContentUtils.h"
#include "nsIContent.h"

namespace mozilla {
namespace dom {

// static
already_AddRefed<Touch> Touch::Constructor(const GlobalObject& aGlobal,
                                           const TouchInit& aParam) {
  // Annoyingly many parameters, make sure the ordering is the same as in the
  // Touch constructor.
  RefPtr<Touch> touch = new Touch(
      aParam.mTarget, aParam.mIdentifier, aParam.mPageX, aParam.mPageY,
      aParam.mScreenX, aParam.mScreenY, aParam.mClientX, aParam.mClientY,
      aParam.mRadiusX, aParam.mRadiusY, aParam.mRotationAngle, aParam.mForce);
  return touch.forget();
}

Touch::Touch(EventTarget* aTarget, int32_t aIdentifier, int32_t aPageX,
             int32_t aPageY, int32_t aScreenX, int32_t aScreenY,
             int32_t aClientX, int32_t aClientY, int32_t aRadiusX,
             int32_t aRadiusY, float aRotationAngle, float aForce)
    : mIsTouchEventSuppressed(false) {
  mTarget = aTarget;
  mOriginalTarget = aTarget;
  mIdentifier = aIdentifier;
  mPagePoint = CSSIntPoint(aPageX, aPageY);
  mScreenPoint = CSSIntPoint(aScreenX, aScreenY);
  mClientPoint = CSSIntPoint(aClientX, aClientY);
  mRefPoint = LayoutDeviceIntPoint(0, 0);
  mPointsInitialized = true;
  mRadius.x = aRadiusX;
  mRadius.y = aRadiusY;
  mRotationAngle = aRotationAngle;
  mForce = aForce;

  mChanged = false;
  mMessage = 0;
  nsJSContext::LikelyShortLivingObjectCreated();
}

Touch::Touch(int32_t aIdentifier, LayoutDeviceIntPoint aPoint,
             LayoutDeviceIntPoint aRadius, float aRotationAngle, float aForce)
    : mIsTouchEventSuppressed(false) {
  mIdentifier = aIdentifier;
  mPagePoint = CSSIntPoint(0, 0);
  mScreenPoint = CSSIntPoint(0, 0);
  mClientPoint = CSSIntPoint(0, 0);
  mRefPoint = aPoint;
  mPointsInitialized = false;
  mRadius = aRadius;
  mRotationAngle = aRotationAngle;
  mForce = aForce;

  mChanged = false;
  mMessage = 0;
  nsJSContext::LikelyShortLivingObjectCreated();
}

Touch::Touch(const Touch& aOther)
    : mOriginalTarget(aOther.mOriginalTarget),
      mTarget(aOther.mTarget),
      mRefPoint(aOther.mRefPoint),
      mChanged(aOther.mChanged),
      mIsTouchEventSuppressed(aOther.mIsTouchEventSuppressed),
      mMessage(aOther.mMessage),
      mIdentifier(aOther.mIdentifier),
      mPagePoint(aOther.mPagePoint),
      mClientPoint(aOther.mClientPoint),
      mScreenPoint(aOther.mScreenPoint),
      mRadius(aOther.mRadius),
      mRotationAngle(aOther.mRotationAngle),
      mForce(aOther.mForce),
      mPointsInitialized(aOther.mPointsInitialized) {
  nsJSContext::LikelyShortLivingObjectCreated();
}

Touch::~Touch() {}

// static
bool Touch::PrefEnabled(JSContext* aCx, JSObject* aGlobal) {
  return TouchEvent::PrefEnabled(aCx, aGlobal);
}

NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Touch, mTarget, mOriginalTarget)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Touch)
  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END

NS_IMPL_CYCLE_COLLECTING_ADDREF(Touch)
NS_IMPL_CYCLE_COLLECTING_RELEASE(Touch)

EventTarget* Touch::GetTarget() const {
  nsCOMPtr<nsIContent> content = do_QueryInterface(mTarget);
  if (content && content->ChromeOnlyAccess() &&
      !nsContentUtils::LegacyIsCallerNativeCode() &&
      !nsContentUtils::CanAccessNativeAnon()) {
    return content->FindFirstNonChromeOnlyAccessContent();
  }

  return mTarget;
}

int32_t Touch::ScreenX(CallerType aCallerType) const {
  if (nsContentUtils::ResistFingerprinting(aCallerType)) {
    return ClientX();
  }

  return mScreenPoint.x;
}

int32_t Touch::ScreenY(CallerType aCallerType) const {
  if (nsContentUtils::ResistFingerprinting(aCallerType)) {
    return ClientY();
  }

  return mScreenPoint.y;
}

int32_t Touch::RadiusX(CallerType aCallerType) const {
  if (nsContentUtils::ResistFingerprinting(aCallerType)) {
    return 0;
  }

  return mRadius.x;
}

int32_t Touch::RadiusY(CallerType aCallerType) const {
  if (nsContentUtils::ResistFingerprinting(aCallerType)) {
    return 0;
  }

  return mRadius.y;
}

float Touch::RotationAngle(CallerType aCallerType) const {
  if (nsContentUtils::ResistFingerprinting(aCallerType)) {
    return 0.0f;
  }

  return mRotationAngle;
}

float Touch::Force(CallerType aCallerType) const {
  if (nsContentUtils::ResistFingerprinting(aCallerType)) {
    return 0.0f;
  }

  return mForce;
}

void Touch::InitializePoints(nsPresContext* aPresContext, WidgetEvent* aEvent) {
  if (mPointsInitialized) {
    return;
  }
  mClientPoint =
      Event::GetClientCoords(aPresContext, aEvent, mRefPoint, mClientPoint);
  mPagePoint =
      Event::GetPageCoords(aPresContext, aEvent, mRefPoint, mClientPoint);
  mScreenPoint = Event::GetScreenCoords(aPresContext, aEvent, mRefPoint);
  mPointsInitialized = true;
}

void Touch::SetTouchTarget(EventTarget* aTarget) {
  mOriginalTarget = aTarget;
  mTarget = aTarget;
}

bool Touch::Equals(Touch* aTouch) const {
  return mRefPoint == aTouch->mRefPoint && mForce == aTouch->mForce &&
         mRotationAngle == aTouch->mRotationAngle &&
         mRadius.x == aTouch->mRadius.x && mRadius.y == aTouch->mRadius.y;
}

JSObject* Touch::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
  return Touch_Binding::Wrap(aCx, this, aGivenProto);
}

// Parent ourselves to the global of the target. This achieves the desirable
// effects of parenting to the target, but avoids making the touch inaccessible
// when the target happens to be NAC and therefore reflected into the XBL scope.
nsIGlobalObject* Touch::GetParentObject() {
  if (!mOriginalTarget) {
    return nullptr;
  }
  return mOriginalTarget->GetOwnerGlobal();
}

}  // namespace dom
}  // namespace mozilla