Issue #1751 -- Remove cocoa and uikit widget support code

1 files changed, 0 insertions, 219 deletions

diff --git a/widget/cocoa/SwipeTracker.mm b/widget/cocoa/SwipeTracker.mm
deleted file mode 100644
index 51169171a4..0000000000
--- a/widget/cocoa/SwipeTracker.mm
+++ /dev/null
@@ -1,219 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* 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 "SwipeTracker.h"
-
-#include "InputData.h"
-#include "mozilla/TimeStamp.h"
-#include "mozilla/TouchEvents.h"
-#include "nsAlgorithm.h"
-#include "nsChildView.h"
-#include "UnitTransforms.h"
-
-// These values were tweaked to make the physics feel similar to the native swipe.
-static const double kSpringForce = 250.0;
-static const double kVelocityTwitchTolerance = 0.0000001;
-static const double kWholePagePixelSize = 1000.0;
-static const double kRubberBandResistanceFactor = 4.0;
-static const double kSwipeSuccessThreshold = 0.25;
-static const double kSwipeSuccessVelocityContribution = 0.3;
-
-namespace mozilla {
-
-static already_AddRefed<nsRefreshDriver>
-GetRefreshDriver(nsIWidget& aWidget)
-{
-  nsIWidgetListener* widgetListener = aWidget.GetWidgetListener();
-  nsIPresShell* presShell = widgetListener ? widgetListener->GetPresShell() : nullptr;
-  nsPresContext* presContext = presShell ? presShell->GetPresContext() : nullptr;
-  RefPtr<nsRefreshDriver> refreshDriver = presContext ? presContext->RefreshDriver() : nullptr;
-  return refreshDriver.forget();
-}
-
-SwipeTracker::SwipeTracker(nsChildView& aWidget,
-                           const PanGestureInput& aSwipeStartEvent,
-                           uint32_t aAllowedDirections,
-                           uint32_t aSwipeDirection)
-  : mWidget(aWidget)
-  , mRefreshDriver(GetRefreshDriver(mWidget))
-  , mAxis(0.0, 0.0, 0.0, kSpringForce, 1.0)
-  , mEventPosition(RoundedToInt(ViewAs<LayoutDevicePixel>(aSwipeStartEvent.mPanStartPoint,
-                                  PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent)))
-  , mLastEventTimeStamp(aSwipeStartEvent.mTimeStamp)
-  , mAllowedDirections(aAllowedDirections)
-  , mSwipeDirection(aSwipeDirection)
-  , mGestureAmount(0.0)
-  , mCurrentVelocity(0.0)
-  , mEventsAreControllingSwipe(true)
-  , mEventsHaveStartedNewGesture(false)
-  , mRegisteredWithRefreshDriver(false)
-{
-  SendSwipeEvent(eSwipeGestureStart, 0, 0.0);
-  ProcessEvent(aSwipeStartEvent);
-}
-
-void
-SwipeTracker::Destroy()
-{
-  UnregisterFromRefreshDriver();
-}
-
-SwipeTracker::~SwipeTracker()
-{
-  MOZ_ASSERT(!mRegisteredWithRefreshDriver, "Destroy needs to be called before deallocating");
-}
-
-double
-SwipeTracker::SwipeSuccessTargetValue() const
-{
-  return (mSwipeDirection == nsIDOMSimpleGestureEvent::DIRECTION_RIGHT) ? -1.0 : 1.0;
-}
-
-double
-SwipeTracker::ClampToAllowedRange(double aGestureAmount) const
-{
-  // gestureAmount needs to stay between -1 and 0 when swiping right and
-  // between 0 and 1 when swiping left.
-  double min = (mSwipeDirection == nsIDOMSimpleGestureEvent::DIRECTION_RIGHT) ? -1.0 : 0.0;
-  double max = (mSwipeDirection == nsIDOMSimpleGestureEvent::DIRECTION_LEFT) ? 1.0 : 0.0;
-  return clamped(aGestureAmount, min, max);
-}
-
-bool
-SwipeTracker::ComputeSwipeSuccess() const
-{
-  double targetValue = SwipeSuccessTargetValue();
-
-  // If the fingers were moving away from the target direction when they were
-  // lifted from the touchpad, abort the swipe.
-  if (mCurrentVelocity * targetValue < -kVelocityTwitchTolerance) {
-    return false;
-  }
-
-  return (mGestureAmount * targetValue +
-          mCurrentVelocity * targetValue * kSwipeSuccessVelocityContribution) >= kSwipeSuccessThreshold;
-}
-
-nsEventStatus
-SwipeTracker::ProcessEvent(const PanGestureInput& aEvent)
-{
-  // If the fingers have already been lifted, don't process this event for swiping.
-  if (!mEventsAreControllingSwipe) {
-    // Return nsEventStatus_eConsumeNoDefault for events from the swipe gesture
-    // and nsEventStatus_eIgnore for events of subsequent scroll gestures.
-    if (aEvent.mType == PanGestureInput::PANGESTURE_MAYSTART ||
-        aEvent.mType == PanGestureInput::PANGESTURE_START) {
-      mEventsHaveStartedNewGesture = true;
-    }
-    return mEventsHaveStartedNewGesture ? nsEventStatus_eIgnore : nsEventStatus_eConsumeNoDefault;
-  }
-
-  double delta = -aEvent.mPanDisplacement.x / mWidget.BackingScaleFactor() / kWholePagePixelSize;
-  if (!SwipingInAllowedDirection()) {
-    delta /= kRubberBandResistanceFactor;
-  }
-  mGestureAmount = ClampToAllowedRange(mGestureAmount + delta);
-  SendSwipeEvent(eSwipeGestureUpdate, 0, mGestureAmount);
-
-  if (aEvent.mType != PanGestureInput::PANGESTURE_END) {
-    double elapsedSeconds = std::max(0.008, (aEvent.mTimeStamp - mLastEventTimeStamp).ToSeconds());
-    mCurrentVelocity = delta / elapsedSeconds;
-    mLastEventTimeStamp = aEvent.mTimeStamp;
-  } else {
-    mEventsAreControllingSwipe = false;
-    bool didSwipeSucceed = SwipingInAllowedDirection() && ComputeSwipeSuccess();
-    double targetValue = 0.0;
-    if (didSwipeSucceed) {
-      SendSwipeEvent(eSwipeGesture, mSwipeDirection, 0.0);
-      targetValue = SwipeSuccessTargetValue();
-    }
-    StartAnimating(targetValue);
-  }
-
-  return nsEventStatus_eConsumeNoDefault;
-}
-
-void
-SwipeTracker::StartAnimating(double aTargetValue)
-{
-  mAxis.SetPosition(mGestureAmount);
-  mAxis.SetDestination(aTargetValue);
-  mAxis.SetVelocity(mCurrentVelocity);
-
-  mLastAnimationFrameTime = TimeStamp::Now();
-
-  // Add ourselves as a refresh driver observer. The refresh driver
-  // will call WillRefresh for each animation frame until we
-  // unregister ourselves.
-  MOZ_ASSERT(!mRegisteredWithRefreshDriver);
-  if (mRefreshDriver) {
-    mRefreshDriver->AddRefreshObserver(this, Flush_Style);
-    mRegisteredWithRefreshDriver = true;
-  }
-}
-
-void
-SwipeTracker::WillRefresh(mozilla::TimeStamp aTime)
-{
-  TimeStamp now = TimeStamp::Now();
-  mAxis.Simulate(now - mLastAnimationFrameTime);
-  mLastAnimationFrameTime = now;
-
-  bool isFinished = mAxis.IsFinished(1.0 / kWholePagePixelSize);
-  mGestureAmount = (isFinished ? mAxis.GetDestination() : mAxis.GetPosition());
-  SendSwipeEvent(eSwipeGestureUpdate, 0, mGestureAmount);
-
-  if (isFinished) {
-    UnregisterFromRefreshDriver();
-    SwipeFinished();
-  }
-}
-
-void
-SwipeTracker::CancelSwipe()
-{
-  SendSwipeEvent(eSwipeGestureEnd, 0, 0.0);
-}
-
-void SwipeTracker::SwipeFinished()
-{
-  SendSwipeEvent(eSwipeGestureEnd, 0, 0.0);
-  mWidget.SwipeFinished();
-}
-
-void
-SwipeTracker::UnregisterFromRefreshDriver()
-{
-  if (mRegisteredWithRefreshDriver) {
-    MOZ_ASSERT(mRefreshDriver, "How were we able to register, then?");
-    mRefreshDriver->RemoveRefreshObserver(this, Flush_Style);
-  }
-  mRegisteredWithRefreshDriver = false;
-}
-
-/* static */ WidgetSimpleGestureEvent
-SwipeTracker::CreateSwipeGestureEvent(EventMessage aMsg, nsIWidget* aWidget,
-                                      const LayoutDeviceIntPoint& aPosition)
-{
-  WidgetSimpleGestureEvent geckoEvent(true, aMsg, aWidget);
-  geckoEvent.mModifiers = 0;
-  geckoEvent.mTimeStamp = TimeStamp::Now();
-  geckoEvent.mRefPoint = aPosition;
-  geckoEvent.buttons = 0;
-  return geckoEvent;
-}
-
-bool
-SwipeTracker::SendSwipeEvent(EventMessage aMsg, uint32_t aDirection, double aDelta)
-{
-  WidgetSimpleGestureEvent geckoEvent =
-    CreateSwipeGestureEvent(aMsg, &mWidget, mEventPosition);
-  geckoEvent.mDirection = aDirection;
-  geckoEvent.mDelta = aDelta;
-  geckoEvent.mAllowedDirections = mAllowedDirections;
-  return mWidget.DispatchWindowEvent(geckoEvent);
-}
-
-} // namespace mozilla