APZChild.h - mozsearch

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/* -*- 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/. */

#ifndef mozilla_layers_APZChild_h

#define mozilla_layers_APZChild_h

#include "mozilla/layers/PAPZChild.h"

#include "mozilla/layers/APZTaskRunnable.h"

namespace mozilla {

namespace layers {

class GeckoContentController;

/**

 * APZChild implements PAPZChild and is used to remote a GeckoContentController

 * that lives in a different process than where APZ lives.

*/

class APZChild final : public PAPZChild {

 public:

  using APZStateChange = GeckoContentController_APZStateChange;

  explicit APZChild(RefPtr<GeckoContentController> aController);

  virtual ~APZChild();

  mozilla::ipc::IPCResult RecvLayerTransforms(

      nsTArray<MatrixMessage>&& aTransforms);

  mozilla::ipc::IPCResult RecvRequestContentRepaint(

      const RepaintRequest& aRequest);

  mozilla::ipc::IPCResult RecvUpdateOverscrollVelocity(

      const ScrollableLayerGuid& aGuid, const float& aX, const float& aY,

      const bool& aIsRootContent);

  mozilla::ipc::IPCResult RecvUpdateOverscrollOffset(

      const ScrollableLayerGuid& aGuid, const float& aX, const float& aY,

      const bool& aIsRootContent);

  mozilla::ipc::IPCResult RecvNotifyMozMouseScrollEvent(const ViewID& aScrollId,

                                                        const nsString& aEvent);

  mozilla::ipc::IPCResult RecvNotifyAPZStateChange(

      const ScrollableLayerGuid& aGuid, const APZStateChange& aChange,

      const int& aArg, Maybe<uint64_t> aInputBlockId);

  mozilla::ipc::IPCResult RecvNotifyFlushComplete();

  mozilla::ipc::IPCResult RecvNotifyAsyncScrollbarDragInitiated(

      const uint64_t& aDragBlockId, const ViewID& aScrollId,

      const ScrollDirection& aDirection);

  mozilla::ipc::IPCResult RecvNotifyAsyncScrollbarDragRejected(

      const ViewID& aScrollId);

  mozilla::ipc::IPCResult RecvNotifyAsyncAutoscrollRejected(

      const ViewID& aScrollId);

  mozilla::ipc::IPCResult RecvDestroy();

 private:

  void EnsureAPZTaskRunnable() {

    if (!mAPZTaskRunnable) {

      mAPZTaskRunnable = new APZTaskRunnable(mController);

  RefPtr<GeckoContentController> mController;

  // A runnable invoked in a nsRefreshDriver's tick to update multiple

  // RepaintRequests and notify a "apz-repaints-flushed" at the same time.

  RefPtr<APZTaskRunnable> mAPZTaskRunnable;

};

}  // namespace layers

}  // namespace mozilla

#endif  // mozilla_layers_APZChild_h