1 files changed, 199 insertions, 0 deletions
diff --git a/gfx/layers/ipc/APZCTreeManagerParent.cpp b/gfx/layers/ipc/APZCTreeManagerParent.cpp
new file mode 100644
index 0000000000..ff05acd083
--- /dev/null
+++ b/gfx/layers/ipc/APZCTreeManagerParent.cpp
@@ -0,0 +1,199 @@
+/* -*- 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/APZCTreeManagerParent.h"
+
+#include "apz/src/APZCTreeManager.h"
+#include "mozilla/layers/APZThreadUtils.h"
+#include "mozilla/layers/APZUpdater.h"
+#include "mozilla/layers/CompositorBridgeParent.h"
+#include "mozilla/layers/CompositorThread.h"
+#include "nsThreadUtils.h"
+
+namespace mozilla {
+namespace layers {
+
+APZCTreeManagerParent::APZCTreeManagerParent(
+    LayersId aLayersId, RefPtr<APZCTreeManager> aAPZCTreeManager,
+    RefPtr<APZUpdater> aAPZUpdater)
+    : mLayersId(aLayersId),
+      mTreeManager(std::move(aAPZCTreeManager)),
+      mUpdater(std::move(aAPZUpdater)) {
+  MOZ_ASSERT(mTreeManager != nullptr);
+  MOZ_ASSERT(mUpdater != nullptr);
+  MOZ_ASSERT(mUpdater->HasTreeManager(mTreeManager));
+}
+
+APZCTreeManagerParent::~APZCTreeManagerParent() = default;
+
+void APZCTreeManagerParent::ChildAdopted(
+    RefPtr<APZCTreeManager> aAPZCTreeManager, RefPtr<APZUpdater> aAPZUpdater) {
+  MOZ_ASSERT(aAPZCTreeManager != nullptr);
+  MOZ_ASSERT(aAPZUpdater != nullptr);
+  MOZ_ASSERT(aAPZUpdater->HasTreeManager(aAPZCTreeManager));
+  mTreeManager = std::move(aAPZCTreeManager);
+  mUpdater = std::move(aAPZUpdater);
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerParent::RecvSetKeyboardMap(
+    const KeyboardMap& aKeyboardMap) {
+  mUpdater->RunOnUpdaterThread(
+      mLayersId, NewRunnableMethod<KeyboardMap>(
+                     "layers::IAPZCTreeManager::SetKeyboardMap", mTreeManager,
+                     &IAPZCTreeManager::SetKeyboardMap, aKeyboardMap));
+
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerParent::RecvZoomToRect(
+    const ScrollableLayerGuid& aGuid, const ZoomTarget& aZoomTarget,
+    const uint32_t& aFlags) {
+  if (!IsGuidValid(aGuid)) {
+    return IPC_FAIL_NO_REASON(this);
+  }
+
+  mUpdater->RunOnUpdaterThread(
+      aGuid.mLayersId,
+      NewRunnableMethod<ScrollableLayerGuid, ZoomTarget, uint32_t>(
+          "layers::IAPZCTreeManager::ZoomToRect", mTreeManager,
+          &IAPZCTreeManager::ZoomToRect, aGuid, aZoomTarget, aFlags));
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerParent::RecvContentReceivedInputBlock(
+    const uint64_t& aInputBlockId, const bool& aPreventDefault) {
+  mUpdater->RunOnUpdaterThread(
+      mLayersId, NewRunnableMethod<uint64_t, bool>(
+                     "layers::IAPZCTreeManager::ContentReceivedInputBlock",
+                     mTreeManager, &IAPZCTreeManager::ContentReceivedInputBlock,
+                     aInputBlockId, aPreventDefault));
+
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerParent::RecvSetTargetAPZC(
+    const uint64_t& aInputBlockId, nsTArray<ScrollableLayerGuid>&& aTargets) {
+  mUpdater->RunOnUpdaterThread(
+      mLayersId,
+      NewRunnableMethod<uint64_t,
+                        StoreCopyPassByRRef<nsTArray<ScrollableLayerGuid>>>(
+          "layers::IAPZCTreeManager::SetTargetAPZC", mTreeManager,
+          &IAPZCTreeManager::SetTargetAPZC, aInputBlockId,
+          std::move(aTargets)));
+
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerParent::RecvUpdateZoomConstraints(
+    const ScrollableLayerGuid& aGuid,
+    const Maybe<ZoomConstraints>& aConstraints) {
+  if (!IsGuidValid(aGuid)) {
+    return IPC_FAIL_NO_REASON(this);
+  }
+
+  mTreeManager->UpdateZoomConstraints(aGuid, aConstraints);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerParent::RecvSetDPI(
+    const float& aDpiValue) {
+  mUpdater->RunOnUpdaterThread(
+      mLayersId,
+      NewRunnableMethod<float>("layers::IAPZCTreeManager::SetDPI", mTreeManager,
+                               &IAPZCTreeManager::SetDPI, aDpiValue));
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerParent::RecvSetAllowedTouchBehavior(
+    const uint64_t& aInputBlockId, nsTArray<TouchBehaviorFlags>&& aValues) {
+  mUpdater->RunOnUpdaterThread(
+      mLayersId,
+      NewRunnableMethod<uint64_t,
+                        StoreCopyPassByRRef<nsTArray<TouchBehaviorFlags>>>(
+          "layers::IAPZCTreeManager::SetAllowedTouchBehavior", mTreeManager,
+          &IAPZCTreeManager::SetAllowedTouchBehavior, aInputBlockId,
+          std::move(aValues)));
+
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerParent::RecvSetBrowserGestureResponse(
+    const uint64_t& aInputBlockId, const BrowserGestureResponse& aResponse) {
+  mUpdater->RunOnUpdaterThread(
+      mLayersId, NewRunnableMethod<uint64_t, BrowserGestureResponse>(
+                     "layers::IAPZCTreeManager::SetBrowserGestureResponse",
+                     mTreeManager, &IAPZCTreeManager::SetBrowserGestureResponse,
+                     aInputBlockId, aResponse));
+
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerParent::RecvStartScrollbarDrag(
+    const ScrollableLayerGuid& aGuid, const AsyncDragMetrics& aDragMetrics) {
+  if (!IsGuidValid(aGuid)) {
+    return IPC_FAIL_NO_REASON(this);
+  }
+
+  mUpdater->RunOnUpdaterThread(
+      aGuid.mLayersId,
+      NewRunnableMethod<ScrollableLayerGuid, AsyncDragMetrics>(
+          "layers::IAPZCTreeManager::StartScrollbarDrag", mTreeManager,
+          &IAPZCTreeManager::StartScrollbarDrag, aGuid, aDragMetrics));
+
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerParent::RecvStartAutoscroll(
+    const ScrollableLayerGuid& aGuid, const ScreenPoint& aAnchorLocation) {
+  // Unlike RecvStartScrollbarDrag(), this message comes from the parent
+  // process (via nsBaseWidget::mAPZC) rather than from the child process
+  // (via BrowserChild::mApzcTreeManager), so there is no need to check the
+  // layers id against mLayersId (and in any case, it wouldn't match, because
+  // mLayersId stores the parent process's layers id, while nsBaseWidget is
+  // sending the child process's layers id).
+
+  mUpdater->RunOnControllerThread(
+      mLayersId,
+      NewRunnableMethod<ScrollableLayerGuid, ScreenPoint>(
+          "layers::IAPZCTreeManager::StartAutoscroll", mTreeManager,
+          &IAPZCTreeManager::StartAutoscroll, aGuid, aAnchorLocation));
+
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerParent::RecvStopAutoscroll(
+    const ScrollableLayerGuid& aGuid) {
+  // See RecvStartAutoscroll() for why we don't check the layers id.
+
+  mUpdater->RunOnControllerThread(
+      mLayersId, NewRunnableMethod<ScrollableLayerGuid>(
+                     "layers::IAPZCTreeManager::StopAutoscroll", mTreeManager,
+                     &IAPZCTreeManager::StopAutoscroll, aGuid));
+
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult APZCTreeManagerParent::RecvSetLongTapEnabled(
+    const bool& aLongTapEnabled) {
+  mUpdater->RunOnUpdaterThread(
+      mLayersId,
+      NewRunnableMethod<bool>(
+          "layers::IAPZCTreeManager::SetLongTapEnabled", mTreeManager,
+          &IAPZCTreeManager::SetLongTapEnabled, aLongTapEnabled));
+
+  return IPC_OK();
+}
+
+bool APZCTreeManagerParent::IsGuidValid(const ScrollableLayerGuid& aGuid) {
+  if (aGuid.mLayersId != mLayersId) {
+    NS_ERROR("Unexpected layers id");
+    return false;
+  }
+  return true;
+}
+
+}  // namespace layers
+}  // namespace mozilla