1 files changed, 181 insertions, 0 deletions
diff --git a/gfx/layers/ipc/APZCTreeManagerChild.cpp b/gfx/layers/ipc/APZCTreeManagerChild.cpp
new file mode 100644
index 0000000000..b9fc37efb9
--- /dev/null
+++ b/gfx/layers/ipc/APZCTreeManagerChild.cpp
@@ -0,0 +1,181 @@
+/* -*- 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/BrowserParent.h"              // for BrowserParent
+#include "mozilla/layers/APZCCallbackHelper.h"      // for APZCCallbackHelper
+#include "mozilla/layers/APZInputBridgeChild.h"     // for APZInputBridgeChild
+#include "mozilla/layers/GeckoContentController.h"  // for GeckoContentController
+#include "mozilla/layers/RemoteCompositorSession.h"  // for RemoteCompositorSession
+
+namespace mozilla {
+namespace layers {
+
+APZCTreeManagerChild::APZCTreeManagerChild()
+    : mCompositorSession(nullptr), mIPCOpen(false) {}
+
+APZCTreeManagerChild::~APZCTreeManagerChild() = default;
+
+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;
+}
+
+void APZCTreeManagerChild::SetInputBridge(APZInputBridgeChild* aInputBridge) {
+  // The input bridge only exists from the UI process to the GPU process.
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(!mInputBridge);
+
+  mInputBridge = aInputBridge;
+}
+
+void APZCTreeManagerChild::Destroy() {
+  MOZ_ASSERT(NS_IsMainThread());
+  if (mInputBridge) {
+    mInputBridge->Destroy();
+    mInputBridge = nullptr;
+  }
+}
+
+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) {
+  if (mIPCOpen) {
+    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);
+}
+
+APZInputBridge* APZCTreeManagerChild::InputBridge() {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(mInputBridge);
+
+  return mInputBridge.get();
+}
+
+void APZCTreeManagerChild::AddInputBlockCallback(
+    uint64_t aInputBlockId, InputBlockCallback&& aCallback) {
+  MOZ_RELEASE_ASSERT(false,
+                     "Remoting of input block callbacks is not implemented");
+}
+
+void APZCTreeManagerChild::AddIPDLReference() {
+  MOZ_ASSERT(mIPCOpen == false);
+  mIPCOpen = true;
+  AddRef();
+}
+
+void APZCTreeManagerChild::ReleaseIPDLReference() {
+  mIPCOpen = false;
+  Release();
+}
+
+void APZCTreeManagerChild::ActorDestroy(ActorDestroyReason aWhy) {
+  mIPCOpen = false;
+}
+
+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()) {
+    RefPtr<GeckoContentController> controller =
+        mCompositorSession->GetContentController();
+    controller->HandleTap(aType, aPoint, aModifiers, aGuid, aInputBlockId);
+    return IPC_OK();
+  }
+  dom::BrowserParent* tab =
+      dom::BrowserParent::GetBrowserParentFromLayersId(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 LayoutDevicePoint& aFocusPoint, 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, aFocusPoint, aSpanChange,
+                                           aModifiers,
+                                           mCompositorSession->GetWidget());
+  }
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerChild::RecvCancelAutoscroll(
+    const ScrollableLayerGuid::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