layers/ipc/APZCTreeManagerChild.cpp

/* -*- 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/layers/APZCTreeManagerChild.h"

#include "InputData.h"                               // for InputData
#include "mozilla/dom/TabParent.h"                   // for TabParent
#include "mozilla/layers/APZCCallbackHelper.h"       // for APZCCallbackHelper
#include "mozilla/layers/RemoteCompositorSession.h"  // for RemoteCompositorSession

namespace mozilla {
namespace layers {

APZCTreeManagerChild::APZCTreeManagerChild() : mCompositorSession(nullptr) {}

void APZCTreeManagerChild::SetCompositorSession(
    RemoteCompositorSession* aSession) {
  // Exactly one of mCompositorSession and aSession must be null (i.e. either
  // we're setting mCompositorSession or we're clearing it).
  MOZ_ASSERT(!mCompositorSession ^ !aSession);
  mCompositorSession = aSession;
}

nsEventStatus APZCTreeManagerChild::ReceiveInputEvent(
    InputData& aEvent, ScrollableLayerGuid* aOutTargetGuid,
    uint64_t* aOutInputBlockId) {
  switch (aEvent.mInputType) {
    case MULTITOUCH_INPUT: {
      MultiTouchInput& event = aEvent.AsMultiTouchInput();
      MultiTouchInput processedEvent;

      nsEventStatus res;
      SendReceiveMultiTouchInputEvent(event, &res, &processedEvent,
                                      aOutTargetGuid, aOutInputBlockId);

      event = processedEvent;
      return res;
    }
    case MOUSE_INPUT: {
      MouseInput& event = aEvent.AsMouseInput();
      MouseInput processedEvent;

      nsEventStatus res;
      SendReceiveMouseInputEvent(event, &res, &processedEvent, aOutTargetGuid,
                                 aOutInputBlockId);

      event = processedEvent;
      return res;
    }
    case PANGESTURE_INPUT: {
      PanGestureInput& event = aEvent.AsPanGestureInput();
      PanGestureInput processedEvent;

      nsEventStatus res;
      SendReceivePanGestureInputEvent(event, &res, &processedEvent,
                                      aOutTargetGuid, aOutInputBlockId);

      event = processedEvent;
      return res;
    }
    case PINCHGESTURE_INPUT: {
      PinchGestureInput& event = aEvent.AsPinchGestureInput();
      PinchGestureInput processedEvent;

      nsEventStatus res;
      SendReceivePinchGestureInputEvent(event, &res, &processedEvent,
                                        aOutTargetGuid, aOutInputBlockId);

      event = processedEvent;
      return res;
    }
    case TAPGESTURE_INPUT: {
      TapGestureInput& event = aEvent.AsTapGestureInput();
      TapGestureInput processedEvent;

      nsEventStatus res;
      SendReceiveTapGestureInputEvent(event, &res, &processedEvent,
                                      aOutTargetGuid, aOutInputBlockId);

      event = processedEvent;
      return res;
    }
    case SCROLLWHEEL_INPUT: {
      ScrollWheelInput& event = aEvent.AsScrollWheelInput();
      ScrollWheelInput processedEvent;

      nsEventStatus res;
      SendReceiveScrollWheelInputEvent(event, &res, &processedEvent,
                                       aOutTargetGuid, aOutInputBlockId);

      event = processedEvent;
      return res;
    }
    case KEYBOARD_INPUT: {
      KeyboardInput& event = aEvent.AsKeyboardInput();
      KeyboardInput processedEvent;

      nsEventStatus res;
      SendReceiveKeyboardInputEvent(event, &res, &processedEvent,
                                    aOutTargetGuid, aOutInputBlockId);

      event = processedEvent;
      return res;
    }
    default: {
      MOZ_ASSERT_UNREACHABLE("Invalid InputData type.");
      return nsEventStatus_eConsumeNoDefault;
    }
  }
}

void APZCTreeManagerChild::SetKeyboardMap(const KeyboardMap& aKeyboardMap) {
  SendSetKeyboardMap(aKeyboardMap);
}

void APZCTreeManagerChild::ZoomToRect(const ScrollableLayerGuid& aGuid,
                                      const CSSRect& aRect,
                                      const uint32_t aFlags) {
  SendZoomToRect(aGuid, aRect, aFlags);
}

void APZCTreeManagerChild::ContentReceivedInputBlock(uint64_t aInputBlockId,
                                                     bool aPreventDefault) {
  SendContentReceivedInputBlock(aInputBlockId, aPreventDefault);
}

void APZCTreeManagerChild::SetTargetAPZC(
    uint64_t aInputBlockId, const nsTArray<ScrollableLayerGuid>& aTargets) {
  SendSetTargetAPZC(aInputBlockId, aTargets);
}

void APZCTreeManagerChild::UpdateZoomConstraints(
    const ScrollableLayerGuid& aGuid,
    const Maybe<ZoomConstraints>& aConstraints) {
  SendUpdateZoomConstraints(aGuid, aConstraints);
}

void APZCTreeManagerChild::SetDPI(float aDpiValue) { SendSetDPI(aDpiValue); }

void APZCTreeManagerChild::SetAllowedTouchBehavior(
    uint64_t aInputBlockId, const nsTArray<TouchBehaviorFlags>& aValues) {
  SendSetAllowedTouchBehavior(aInputBlockId, aValues);
}

void APZCTreeManagerChild::StartScrollbarDrag(
    const ScrollableLayerGuid& aGuid, const AsyncDragMetrics& aDragMetrics) {
  SendStartScrollbarDrag(aGuid, aDragMetrics);
}

bool APZCTreeManagerChild::StartAutoscroll(const ScrollableLayerGuid& aGuid,
                                           const ScreenPoint& aAnchorLocation) {
  return SendStartAutoscroll(aGuid, aAnchorLocation);
}

void APZCTreeManagerChild::StopAutoscroll(const ScrollableLayerGuid& aGuid) {
  SendStopAutoscroll(aGuid);
}

void APZCTreeManagerChild::SetLongTapEnabled(bool aTapGestureEnabled) {
  SendSetLongTapEnabled(aTapGestureEnabled);
}

void APZCTreeManagerChild::ProcessTouchVelocity(uint32_t aTimestampMs,
                                                float aSpeedY) {
  SendProcessTouchVelocity(aTimestampMs, aSpeedY);
}

void APZCTreeManagerChild::UpdateWheelTransaction(
    LayoutDeviceIntPoint aRefPoint, EventMessage aEventMessage) {
  SendUpdateWheelTransaction(aRefPoint, aEventMessage);
}

void APZCTreeManagerChild::ProcessUnhandledEvent(
    LayoutDeviceIntPoint* aRefPoint, ScrollableLayerGuid* aOutTargetGuid,
    uint64_t* aOutFocusSequenceNumber) {
  SendProcessUnhandledEvent(*aRefPoint, aRefPoint, aOutTargetGuid,
                            aOutFocusSequenceNumber);
}

mozilla::ipc::IPCResult APZCTreeManagerChild::RecvHandleTap(
    const TapType& aType, const LayoutDevicePoint& aPoint,
    const Modifiers& aModifiers, const ScrollableLayerGuid& aGuid,
    const uint64_t& aInputBlockId) {
  MOZ_ASSERT(XRE_IsParentProcess());
  if (mCompositorSession &&
      mCompositorSession->RootLayerTreeId() == aGuid.mLayersId &&
      mCompositorSession->GetContentController()) {
    mCompositorSession->GetContentController()->HandleTap(
        aType, aPoint, aModifiers, aGuid, aInputBlockId);
    return IPC_OK();
  }
  dom::TabParent* tab =
      dom::TabParent::GetTabParentFromLayersId(aGuid.mLayersId);
  if (tab) {
    tab->SendHandleTap(aType, aPoint, aModifiers, aGuid, aInputBlockId);
  }
  return IPC_OK();
}

mozilla::ipc::IPCResult APZCTreeManagerChild::RecvNotifyPinchGesture(
    const PinchGestureType& aType, const ScrollableLayerGuid& aGuid,
    const LayoutDeviceCoord& aSpanChange, const Modifiers& aModifiers) {
  // This will only get sent from the GPU process to the parent process, so
  // this function should never get called in the content process.
  MOZ_ASSERT(XRE_IsParentProcess());
  MOZ_ASSERT(NS_IsMainThread());

  // We want to handle it in this process regardless of what the target guid
  // of the pinch is. This may change in the future.
  if (mCompositorSession && mCompositorSession->GetWidget()) {
    APZCCallbackHelper::NotifyPinchGesture(aType, aSpanChange, aModifiers,
                                           mCompositorSession->GetWidget());
  }
  return IPC_OK();
}

mozilla::ipc::IPCResult APZCTreeManagerChild::RecvCancelAutoscroll(
    const FrameMetrics::ViewID& aScrollId) {
  // This will only get sent from the GPU process to the parent process, so
  // this function should never get called in the content process.
  MOZ_ASSERT(XRE_IsParentProcess());
  MOZ_ASSERT(NS_IsMainThread());

  APZCCallbackHelper::CancelAutoscroll(aScrollId);
  return IPC_OK();
}

}  // namespace layers
}  // namespace mozilla