[CRD iOS] Hook the touch input feedback

remoting/client/render_stub_proxy.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#include "remoting/client/render_stub_proxy.h"
+
+#include "base/bind.h"
+#include "remoting/client/queued_task_poster.h"
+#include "remoting/client/view_matrix.h"
+
+namespace remoting {
+
+RenderStubProxy::RenderStubProxy(
+    base::WeakPtr<RenderStub> stub,
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner)
+    : stub_(stub),
+      task_runner_(task_runner),
+      ui_task_poster_(new remoting::QueuedTaskPoster(task_runner_)) {}
+
+RenderStubProxy::~RenderStubProxy() {}
+
+void RenderStubProxy::SetTransformation(const ViewMatrix& transformation) {
+  // Viewport and cursor movements need to be synchronized into the same frame.
+  RunTaskOnProperThread(
+      base::Bind(&RenderStub::SetTransformation, stub_, transformation), true);
+}
+
+void RenderStubProxy::SetCursorPosition(float x, float y) {
+  RunTaskOnProperThread(base::Bind(&RenderStub::SetCursorPosition, stub_, x, y),
+                        true);
+}
+
+void RenderStubProxy::SetCursorVisibility(bool visible) {
+  RunTaskOnProperThread(
+      base::Bind(&RenderStub::SetCursorVisibility, stub_, visible), false);
+}
+
+void RenderStubProxy::StartInputFeedback(float x, float y, float diameter) {
+  RunTaskOnProperThread(
+      base::Bind(&RenderStub::StartInputFeedback, stub_, x, y, diameter),
+      false);
+}
+
+void RenderStubProxy::RunTaskOnProperThread(const base::Closure& task,
+                                            bool needs_synchronization) {
+  if (task_runner_->BelongsToCurrentThread()) {
+    task.Run();
+    return;
+  }
+
+  if (needs_synchronization) {
+    ui_task_poster_->AddTask(task);
+    return;
+  }
+
+  task_runner_->PostTask(FROM_HERE, task);
+}
+
+}  // namespace remoting