Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 732 insertions, 0 deletions

diff --git a/widget/windows/DirectManipulationOwner.cpp b/widget/windows/DirectManipulationOwner.cpp
new file mode 100644
index 0000000000..3bda193d3a
--- /dev/null
+++ b/widget/windows/DirectManipulationOwner.cpp
@@ -0,0 +1,732 @@
+/* -*- Mode: C++; tab-width: 2; 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 "DirectManipulationOwner.h"
+#include "nsWindow.h"
+#include "WinModifierKeyState.h"
+#include "InputData.h"
+#include "mozilla/StaticPrefs_apz.h"
+#include "mozilla/SwipeTracker.h"
+#include "mozilla/TimeStamp.h"
+#include "mozilla/VsyncDispatcher.h"
+
+// Direct Manipulation is only defined for Win8 and newer.
+#if defined(_WIN32_WINNT)
+#  undef _WIN32_WINNT
+#  define _WIN32_WINNT _WIN32_WINNT_WIN8
+#endif  // defined(_WIN32_WINNT)
+#if defined(NTDDI_VERSION)
+#  undef NTDDI_VERSION
+#  define NTDDI_VERSION NTDDI_WIN8
+#endif  // defined(NTDDI_VERSION)
+
+#include "directmanipulation.h"
+
+namespace mozilla {
+namespace widget {
+
+class DManipEventHandler : public IDirectManipulationViewportEventHandler,
+                           public IDirectManipulationInteractionEventHandler {
+ public:
+  typedef mozilla::LayoutDeviceIntRect LayoutDeviceIntRect;
+
+  friend class DirectManipulationOwner;
+
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DManipEventHandler)
+
+  STDMETHODIMP QueryInterface(REFIID, void**) override;
+
+  friend class DirectManipulationOwner;
+
+  explicit DManipEventHandler(nsWindow* aWindow,
+                              DirectManipulationOwner* aOwner,
+                              const LayoutDeviceIntRect& aBounds);
+
+  HRESULT STDMETHODCALLTYPE OnViewportStatusChanged(
+      IDirectManipulationViewport* viewport, DIRECTMANIPULATION_STATUS current,
+      DIRECTMANIPULATION_STATUS previous) override;
+
+  HRESULT STDMETHODCALLTYPE
+  OnViewportUpdated(IDirectManipulationViewport* viewport) override;
+
+  HRESULT STDMETHODCALLTYPE
+  OnContentUpdated(IDirectManipulationViewport* viewport,
+                   IDirectManipulationContent* content) override;
+
+  HRESULT STDMETHODCALLTYPE
+  OnInteraction(IDirectManipulationViewport2* viewport,
+                DIRECTMANIPULATION_INTERACTION_TYPE interaction) override;
+
+  void Update();
+
+  class VObserver final : public mozilla::VsyncObserver {
+    NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DManipEventHandler::VObserver,
+                                          override)
+
+   public:
+    void NotifyVsync(const mozilla::VsyncEvent& aVsync) override {
+      if (mOwner) {
+        mOwner->Update();
+      }
+    }
+    explicit VObserver(DManipEventHandler* aOwner) : mOwner(aOwner) {}
+
+    void ClearOwner() { mOwner = nullptr; }
+
+   private:
+    virtual ~VObserver() {}
+    DManipEventHandler* mOwner;
+  };
+
+  enum class State { eNone, ePanning, eInertia, ePinching };
+  void TransitionToState(State aNewState);
+
+  enum class Phase { eStart, eMiddle, eEnd };
+  // Return value indicates if we sent an event or not and hence if we should
+  // update mLastScale. (We only want to send pinch events if the computed
+  // deltaY for the corresponding WidgetWheelEvent would be non-zero.)
+  bool SendPinch(Phase aPhase, float aScale);
+  void SendPan(Phase aPhase, float x, float y, bool aIsInertia);
+  static void SendPanCommon(nsWindow* aWindow, Phase aPhase,
+                            ScreenPoint aPosition, double aDeltaX,
+                            double aDeltaY, Modifiers aMods, bool aIsInertia);
+
+  static void SynthesizeNativeTouchpadPan(
+      nsWindow* aWindow, nsIWidget::TouchpadGesturePhase aEventPhase,
+      LayoutDeviceIntPoint aPoint, double aDeltaX, double aDeltaY,
+      int32_t aModifierFlags);
+
+ private:
+  virtual ~DManipEventHandler() = default;
+
+  nsWindow* mWindow;
+  DirectManipulationOwner* mOwner;
+  RefPtr<VObserver> mObserver;
+  float mLastScale;
+  float mLastXOffset;
+  float mLastYOffset;
+  LayoutDeviceIntRect mBounds;
+  bool mShouldSendPanStart;
+  bool mShouldSendPinchStart;
+  State mState = State::eNone;
+};
+
+DManipEventHandler::DManipEventHandler(nsWindow* aWindow,
+                                       DirectManipulationOwner* aOwner,
+                                       const LayoutDeviceIntRect& aBounds)
+    : mWindow(aWindow),
+      mOwner(aOwner),
+      mLastScale(1.f),
+      mLastXOffset(0.f),
+      mLastYOffset(0.f),
+      mBounds(aBounds),
+      mShouldSendPanStart(false),
+      mShouldSendPinchStart(false) {}
+
+STDMETHODIMP
+DManipEventHandler::QueryInterface(REFIID iid, void** ppv) {
+  const IID IID_IDirectManipulationViewportEventHandler =
+      __uuidof(IDirectManipulationViewportEventHandler);
+  const IID IID_IDirectManipulationInteractionEventHandler =
+      __uuidof(IDirectManipulationInteractionEventHandler);
+
+  if ((IID_IUnknown == iid) ||
+      (IID_IDirectManipulationViewportEventHandler == iid)) {
+    *ppv = static_cast<IDirectManipulationViewportEventHandler*>(this);
+    AddRef();
+    return S_OK;
+  }
+  if (IID_IDirectManipulationInteractionEventHandler == iid) {
+    *ppv = static_cast<IDirectManipulationInteractionEventHandler*>(this);
+    AddRef();
+    return S_OK;
+  }
+
+  return E_NOINTERFACE;
+}
+
+HRESULT
+DManipEventHandler::OnViewportStatusChanged(
+    IDirectManipulationViewport* viewport, DIRECTMANIPULATION_STATUS current,
+    DIRECTMANIPULATION_STATUS previous) {
+  if (current == previous) {
+    return S_OK;
+  }
+
+  if (current == DIRECTMANIPULATION_INERTIA) {
+    if (previous != DIRECTMANIPULATION_RUNNING || mState != State::ePanning) {
+      // xxx transition to none?
+      return S_OK;
+    }
+
+    TransitionToState(State::eInertia);
+  }
+
+  if (current == DIRECTMANIPULATION_RUNNING) {
+    // INERTIA -> RUNNING, should start a new sequence.
+    if (previous == DIRECTMANIPULATION_INERTIA) {
+      TransitionToState(State::eNone);
+    }
+  }
+
+  if (current != DIRECTMANIPULATION_ENABLED &&
+      current != DIRECTMANIPULATION_READY) {
+    return S_OK;
+  }
+
+  // A session has ended, reset the transform.
+  if (mLastScale != 1.f || mLastXOffset != 0.f || mLastYOffset != 0.f) {
+    HRESULT hr =
+        viewport->ZoomToRect(0, 0, mBounds.width, mBounds.height, false);
+    if (!SUCCEEDED(hr)) {
+      NS_WARNING("ZoomToRect failed");
+    }
+  }
+  mLastScale = 1.f;
+  mLastXOffset = 0.f;
+  mLastYOffset = 0.f;
+
+  TransitionToState(State::eNone);
+
+  return S_OK;
+}
+
+HRESULT
+DManipEventHandler::OnViewportUpdated(IDirectManipulationViewport* viewport) {
+  return S_OK;
+}
+
+void DManipEventHandler::TransitionToState(State aNewState) {
+  if (mState == aNewState) {
+    return;
+  }
+
+  State prevState = mState;
+  mState = aNewState;
+
+  // End the previous sequence.
+  switch (prevState) {
+    case State::ePanning: {
+      // ePanning -> *: PanEnd
+      SendPan(Phase::eEnd, 0.f, 0.f, false);
+      break;
+    }
+    case State::eInertia: {
+      // eInertia -> *: MomentumEnd
+      SendPan(Phase::eEnd, 0.f, 0.f, true);
+      break;
+    }
+    case State::ePinching: {
+      MOZ_ASSERT(aNewState == State::eNone);
+      // ePinching -> eNone: PinchEnd. ePinching should only transition to
+      // eNone.
+      // Only send a pinch end if we sent a pinch start.
+      if (!mShouldSendPinchStart) {
+        SendPinch(Phase::eEnd, 0.f);
+      }
+      mShouldSendPinchStart = false;
+      break;
+    }
+    case State::eNone: {
+      // eNone -> *: no cleanup is needed.
+      break;
+    }
+    default:
+      MOZ_ASSERT(false);
+  }
+
+  // Start the new sequence.
+  switch (aNewState) {
+    case State::ePanning: {
+      // eInertia, eNone -> ePanning: PanStart.
+      // We're being called from OnContentUpdated, it has the coords we need to
+      // pass to SendPan(Phase::eStart), so set mShouldSendPanStart and when we
+      // return OnContentUpdated will check it and call SendPan(Phase::eStart).
+      mShouldSendPanStart = true;
+      break;
+    }
+    case State::eInertia: {
+      // Only ePanning can transition to eInertia.
+      MOZ_ASSERT(prevState == State::ePanning);
+      SendPan(Phase::eStart, 0.f, 0.f, true);
+      break;
+    }
+    case State::ePinching: {
+      // * -> ePinching: PinchStart.
+      // Pinch gesture may begin with some scroll events.
+      // We're being called from OnContentUpdated, it has the scale we need to
+      // pass to SendPinch(Phase::eStart), so set mShouldSendPinchStart and when
+      // we return OnContentUpdated will check it and call
+      // SendPinch(Phase::eStart).
+      mShouldSendPinchStart = true;
+      break;
+    }
+    case State::eNone: {
+      // * -> eNone: only cleanup is needed.
+      break;
+    }
+    default:
+      MOZ_ASSERT(false);
+  }
+}
+
+HRESULT
+DManipEventHandler::OnContentUpdated(IDirectManipulationViewport* viewport,
+                                     IDirectManipulationContent* content) {
+  float transform[6];
+  HRESULT hr = content->GetContentTransform(transform, ARRAYSIZE(transform));
+  if (!SUCCEEDED(hr)) {
+    NS_WARNING("GetContentTransform failed");
+    return S_OK;
+  }
+
+  float scale = transform[0];
+  float xoffset = transform[4];
+  float yoffset = transform[5];
+
+  // Not different from last time.
+  if (FuzzyEqualsMultiplicative(scale, mLastScale) && xoffset == mLastXOffset &&
+      yoffset == mLastYOffset) {
+    return S_OK;
+  }
+
+  // Consider this is a Scroll when scale factor equals 1.0.
+  if (FuzzyEqualsMultiplicative(scale, 1.f)) {
+    if (mState == State::eNone) {
+      TransitionToState(State::ePanning);
+    }
+  } else {
+    // Pinch gesture may begin with some scroll events.
+    TransitionToState(State::ePinching);
+  }
+
+  if (mState == State::ePanning || mState == State::eInertia) {
+    // Accumulate the offset (by not updating mLastX/YOffset) until we have at
+    // least one pixel.
+    float dx = std::abs(mLastXOffset - xoffset);
+    float dy = std::abs(mLastYOffset - yoffset);
+    if (dx < 1.f && dy < 1.f) {
+      return S_OK;
+    }
+  }
+
+  bool updateLastScale = true;
+  if (mState == State::ePanning) {
+    if (mShouldSendPanStart) {
+      SendPan(Phase::eStart, mLastXOffset - xoffset, mLastYOffset - yoffset,
+              false);
+      mShouldSendPanStart = false;
+    } else {
+      SendPan(Phase::eMiddle, mLastXOffset - xoffset, mLastYOffset - yoffset,
+              false);
+    }
+  } else if (mState == State::eInertia) {
+    SendPan(Phase::eMiddle, mLastXOffset - xoffset, mLastYOffset - yoffset,
+            true);
+  } else if (mState == State::ePinching) {
+    if (mShouldSendPinchStart) {
+      updateLastScale = SendPinch(Phase::eStart, scale);
+      // Only clear mShouldSendPinchStart if we actually sent the event
+      // (updateLastScale tells us if we sent an event).
+      if (updateLastScale) {
+        mShouldSendPinchStart = false;
+      }
+    } else {
+      updateLastScale = SendPinch(Phase::eMiddle, scale);
+    }
+  }
+
+  if (updateLastScale) {
+    mLastScale = scale;
+  }
+  mLastXOffset = xoffset;
+  mLastYOffset = yoffset;
+
+  return S_OK;
+}
+
+HRESULT
+DManipEventHandler::OnInteraction(
+    IDirectManipulationViewport2* viewport,
+    DIRECTMANIPULATION_INTERACTION_TYPE interaction) {
+  if (interaction == DIRECTMANIPULATION_INTERACTION_BEGIN) {
+    if (!mObserver) {
+      mObserver = new VObserver(this);
+    }
+
+    gfxWindowsPlatform::GetPlatform()
+        ->GetGlobalVsyncDispatcher()
+        ->AddMainThreadObserver(mObserver);
+  }
+
+  if (mObserver && interaction == DIRECTMANIPULATION_INTERACTION_END) {
+    gfxWindowsPlatform::GetPlatform()
+        ->GetGlobalVsyncDispatcher()
+        ->RemoveMainThreadObserver(mObserver);
+  }
+
+  return S_OK;
+}
+
+void DManipEventHandler::Update() {
+  if (mOwner) {
+    mOwner->Update();
+  }
+}
+
+void DirectManipulationOwner::Update() {
+  if (mDmUpdateManager) {
+    mDmUpdateManager->Update(nullptr);
+  }
+}
+
+DirectManipulationOwner::DirectManipulationOwner(nsWindow* aWindow)
+    : mWindow(aWindow) {}
+
+DirectManipulationOwner::~DirectManipulationOwner() { Destroy(); }
+
+bool DManipEventHandler::SendPinch(Phase aPhase, float aScale) {
+  if (!mWindow) {
+    return false;
+  }
+
+  if (aScale == mLastScale && aPhase != Phase::eEnd) {
+    return false;
+  }
+
+  PinchGestureInput::PinchGestureType pinchGestureType =
+      PinchGestureInput::PINCHGESTURE_SCALE;
+  switch (aPhase) {
+    case Phase::eStart:
+      pinchGestureType = PinchGestureInput::PINCHGESTURE_START;
+      break;
+    case Phase::eMiddle:
+      pinchGestureType = PinchGestureInput::PINCHGESTURE_SCALE;
+      break;
+    case Phase::eEnd:
+      pinchGestureType = PinchGestureInput::PINCHGESTURE_END;
+      break;
+    default:
+      MOZ_ASSERT_UNREACHABLE("handle all enum values");
+  }
+
+  TimeStamp eventTimeStamp = TimeStamp::Now();
+
+  ModifierKeyState modifierKeyState;
+  Modifiers mods = modifierKeyState.GetModifiers();
+
+  ExternalPoint screenOffset = ViewAs<ExternalPixel>(
+      mWindow->WidgetToScreenOffset(),
+      PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent);
+
+  POINT cursor_pos;
+  ::GetCursorPos(&cursor_pos);
+  HWND wnd = static_cast<HWND>(mWindow->GetNativeData(NS_NATIVE_WINDOW));
+  ::ScreenToClient(wnd, &cursor_pos);
+  ScreenPoint position = {(float)cursor_pos.x, (float)cursor_pos.y};
+
+  PinchGestureInput event{pinchGestureType,
+                          PinchGestureInput::TRACKPAD,
+                          eventTimeStamp,
+                          screenOffset,
+                          position,
+                          100.0 * ((aPhase == Phase::eEnd) ? 1.f : aScale),
+                          100.0 * ((aPhase == Phase::eEnd) ? 1.f : mLastScale),
+                          mods};
+
+  if (!event.SetLineOrPageDeltaY(mWindow)) {
+    return false;
+  }
+
+  mWindow->SendAnAPZEvent(event);
+
+  return true;
+}
+
+void DManipEventHandler::SendPan(Phase aPhase, float x, float y,
+                                 bool aIsInertia) {
+  if (!mWindow) {
+    return;
+  }
+
+  ModifierKeyState modifierKeyState;
+  Modifiers mods = modifierKeyState.GetModifiers();
+
+  POINT cursor_pos;
+  ::GetCursorPos(&cursor_pos);
+  HWND wnd = static_cast<HWND>(mWindow->GetNativeData(NS_NATIVE_WINDOW));
+  ::ScreenToClient(wnd, &cursor_pos);
+  ScreenPoint position = {(float)cursor_pos.x, (float)cursor_pos.y};
+
+  SendPanCommon(mWindow, aPhase, position, x, y, mods, aIsInertia);
+}
+
+/* static */
+void DManipEventHandler::SendPanCommon(nsWindow* aWindow, Phase aPhase,
+                                       ScreenPoint aPosition, double aDeltaX,
+                                       double aDeltaY, Modifiers aMods,
+                                       bool aIsInertia) {
+  if (!aWindow) {
+    return;
+  }
+
+  PanGestureInput::PanGestureType panGestureType =
+      PanGestureInput::PANGESTURE_PAN;
+  if (aIsInertia) {
+    switch (aPhase) {
+      case Phase::eStart:
+        panGestureType = PanGestureInput::PANGESTURE_MOMENTUMSTART;
+        break;
+      case Phase::eMiddle:
+        panGestureType = PanGestureInput::PANGESTURE_MOMENTUMPAN;
+        break;
+      case Phase::eEnd:
+        panGestureType = PanGestureInput::PANGESTURE_MOMENTUMEND;
+        break;
+      default:
+        MOZ_ASSERT_UNREACHABLE("handle all enum values");
+    }
+  } else {
+    switch (aPhase) {
+      case Phase::eStart:
+        panGestureType = PanGestureInput::PANGESTURE_START;
+        break;
+      case Phase::eMiddle:
+        panGestureType = PanGestureInput::PANGESTURE_PAN;
+        break;
+      case Phase::eEnd:
+        panGestureType = PanGestureInput::PANGESTURE_END;
+        break;
+      default:
+        MOZ_ASSERT_UNREACHABLE("handle all enum values");
+    }
+  }
+
+  TimeStamp eventTimeStamp = TimeStamp::Now();
+
+  PanGestureInput event{panGestureType, eventTimeStamp, aPosition,
+                        ScreenPoint(aDeltaX, aDeltaY), aMods};
+
+  aWindow->SendAnAPZEvent(event);
+}
+
+void DirectManipulationOwner::Init(const LayoutDeviceIntRect& aBounds) {
+  HRESULT hr = CoCreateInstance(
+      CLSID_DirectManipulationManager, nullptr, CLSCTX_INPROC_SERVER,
+      IID_IDirectManipulationManager, getter_AddRefs(mDmManager));
+  if (!SUCCEEDED(hr)) {
+    NS_WARNING("CoCreateInstance(CLSID_DirectManipulationManager failed");
+    mDmManager = nullptr;
+    return;
+  }
+
+  hr = mDmManager->GetUpdateManager(IID_IDirectManipulationUpdateManager,
+                                    getter_AddRefs(mDmUpdateManager));
+  if (!SUCCEEDED(hr)) {
+    NS_WARNING("GetUpdateManager failed");
+    mDmManager = nullptr;
+    mDmUpdateManager = nullptr;
+    return;
+  }
+
+  HWND wnd = static_cast<HWND>(mWindow->GetNativeData(NS_NATIVE_WINDOW));
+
+  hr = mDmManager->CreateViewport(nullptr, wnd, IID_IDirectManipulationViewport,
+                                  getter_AddRefs(mDmViewport));
+  if (!SUCCEEDED(hr)) {
+    NS_WARNING("CreateViewport failed");
+    mDmManager = nullptr;
+    mDmUpdateManager = nullptr;
+    mDmViewport = nullptr;
+    return;
+  }
+
+  DIRECTMANIPULATION_CONFIGURATION configuration =
+      DIRECTMANIPULATION_CONFIGURATION_INTERACTION |
+      DIRECTMANIPULATION_CONFIGURATION_TRANSLATION_X |
+      DIRECTMANIPULATION_CONFIGURATION_TRANSLATION_Y |
+      DIRECTMANIPULATION_CONFIGURATION_TRANSLATION_INERTIA |
+      DIRECTMANIPULATION_CONFIGURATION_RAILS_X |
+      DIRECTMANIPULATION_CONFIGURATION_RAILS_Y;
+  if (StaticPrefs::apz_allow_zooming()) {
+    configuration |= DIRECTMANIPULATION_CONFIGURATION_SCALING;
+  }
+
+  hr = mDmViewport->ActivateConfiguration(configuration);
+  if (!SUCCEEDED(hr)) {
+    NS_WARNING("ActivateConfiguration failed");
+    mDmManager = nullptr;
+    mDmUpdateManager = nullptr;
+    mDmViewport = nullptr;
+    return;
+  }
+
+  hr = mDmViewport->SetViewportOptions(
+      DIRECTMANIPULATION_VIEWPORT_OPTIONS_MANUALUPDATE);
+  if (!SUCCEEDED(hr)) {
+    NS_WARNING("SetViewportOptions failed");
+    mDmManager = nullptr;
+    mDmUpdateManager = nullptr;
+    mDmViewport = nullptr;
+    return;
+  }
+
+  mDmHandler = new DManipEventHandler(mWindow, this, aBounds);
+
+  hr = mDmViewport->AddEventHandler(wnd, mDmHandler.get(),
+                                    &mDmViewportHandlerCookie);
+  if (!SUCCEEDED(hr)) {
+    NS_WARNING("AddEventHandler failed");
+    mDmManager = nullptr;
+    mDmUpdateManager = nullptr;
+    mDmViewport = nullptr;
+    mDmHandler = nullptr;
+    return;
+  }
+
+  RECT rect = {0, 0, aBounds.Width(), aBounds.Height()};
+  hr = mDmViewport->SetViewportRect(&rect);
+  if (!SUCCEEDED(hr)) {
+    NS_WARNING("SetViewportRect failed");
+    mDmManager = nullptr;
+    mDmUpdateManager = nullptr;
+    mDmViewport = nullptr;
+    mDmHandler = nullptr;
+    return;
+  }
+
+  hr = mDmManager->Activate(wnd);
+  if (!SUCCEEDED(hr)) {
+    NS_WARNING("manager Activate failed");
+    mDmManager = nullptr;
+    mDmUpdateManager = nullptr;
+    mDmViewport = nullptr;
+    mDmHandler = nullptr;
+    return;
+  }
+
+  hr = mDmViewport->Enable();
+  if (!SUCCEEDED(hr)) {
+    NS_WARNING("mDmViewport->Enable failed");
+    mDmManager = nullptr;
+    mDmUpdateManager = nullptr;
+    mDmViewport = nullptr;
+    mDmHandler = nullptr;
+    return;
+  }
+
+  hr = mDmUpdateManager->Update(nullptr);
+  if (!SUCCEEDED(hr)) {
+    NS_WARNING("mDmUpdateManager->Update failed");
+    mDmManager = nullptr;
+    mDmUpdateManager = nullptr;
+    mDmViewport = nullptr;
+    mDmHandler = nullptr;
+    return;
+  }
+}
+
+void DirectManipulationOwner::ResizeViewport(
+    const LayoutDeviceIntRect& aBounds) {
+  if (mDmHandler) {
+    mDmHandler->mBounds = aBounds;
+  }
+
+  if (mDmViewport) {
+    RECT rect = {0, 0, aBounds.Width(), aBounds.Height()};
+    HRESULT hr = mDmViewport->SetViewportRect(&rect);
+    if (!SUCCEEDED(hr)) {
+      NS_WARNING("SetViewportRect failed");
+    }
+  }
+}
+
+void DirectManipulationOwner::Destroy() {
+  if (mDmHandler) {
+    mDmHandler->mWindow = nullptr;
+    mDmHandler->mOwner = nullptr;
+    if (mDmHandler->mObserver) {
+      gfxWindowsPlatform::GetPlatform()
+          ->GetGlobalVsyncDispatcher()
+          ->RemoveMainThreadObserver(mDmHandler->mObserver);
+      mDmHandler->mObserver->ClearOwner();
+      mDmHandler->mObserver = nullptr;
+    }
+  }
+
+  HRESULT hr;
+  if (mDmViewport) {
+    hr = mDmViewport->Stop();
+    if (!SUCCEEDED(hr)) {
+      NS_WARNING("mDmViewport->Stop() failed");
+    }
+
+    hr = mDmViewport->Disable();
+    if (!SUCCEEDED(hr)) {
+      NS_WARNING("mDmViewport->Disable() failed");
+    }
+
+    hr = mDmViewport->RemoveEventHandler(mDmViewportHandlerCookie);
+    if (!SUCCEEDED(hr)) {
+      NS_WARNING("mDmViewport->RemoveEventHandler() failed");
+    }
+
+    hr = mDmViewport->Abandon();
+    if (!SUCCEEDED(hr)) {
+      NS_WARNING("mDmViewport->Abandon() failed");
+    }
+  }
+
+  if (mWindow) {
+    HWND wnd = static_cast<HWND>(mWindow->GetNativeData(NS_NATIVE_WINDOW));
+
+    if (mDmManager) {
+      hr = mDmManager->Deactivate(wnd);
+      if (!SUCCEEDED(hr)) {
+        NS_WARNING("mDmManager->Deactivate() failed");
+      }
+    }
+  }
+
+  mDmHandler = nullptr;
+  mDmViewport = nullptr;
+  mDmUpdateManager = nullptr;
+  mDmManager = nullptr;
+  mWindow = nullptr;
+}
+
+void DirectManipulationOwner::SetContact(UINT aContactId) {
+  if (mDmViewport) {
+    mDmViewport->SetContact(aContactId);
+  }
+}
+
+/*static  */ void DirectManipulationOwner::SynthesizeNativeTouchpadPan(
+    nsWindow* aWindow, nsIWidget::TouchpadGesturePhase aEventPhase,
+    LayoutDeviceIntPoint aPoint, double aDeltaX, double aDeltaY,
+    int32_t aModifierFlags) {
+  DManipEventHandler::SynthesizeNativeTouchpadPan(
+      aWindow, aEventPhase, aPoint, aDeltaX, aDeltaY, aModifierFlags);
+}
+
+/*static  */ void DManipEventHandler::SynthesizeNativeTouchpadPan(
+    nsWindow* aWindow, nsIWidget::TouchpadGesturePhase aEventPhase,
+    LayoutDeviceIntPoint aPoint, double aDeltaX, double aDeltaY,
+    int32_t aModifierFlags) {
+  ScreenPoint position = {(float)aPoint.x, (float)aPoint.y};
+  Phase phase = Phase::eStart;
+  if (aEventPhase == nsIWidget::PHASE_UPDATE) {
+    phase = Phase::eMiddle;
+  }
+
+  if (aEventPhase == nsIWidget::PHASE_END) {
+    phase = Phase::eEnd;
+  }
+  SendPanCommon(aWindow, phase, position, aDeltaX, aDeltaY, aModifierFlags,
+                /* aIsInertia = */ false);
+}
+
+}  // namespace widget
+}  // namespace mozilla