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Diffstat (limited to 'widget/cocoa/SwipeTracker.mm')
| -rw-r--r-- | widget/cocoa/SwipeTracker.mm | 219 |
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 |