[CRD iOS] Inject mouse events to the host

remoting/client/direct_input_strategy.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/direct_input_strategy.h"
+#include "remoting/client/desktop_viewport.h"
+
+namespace remoting {
+
+DirectInputStrategy::DirectInputStrategy() {}
+
+DirectInputStrategy::~DirectInputStrategy() {}
+
+void DirectInputStrategy::HandlePinch(float pivot_x,
+                                      float pivot_y,
+                                      float scale,
+                                      DesktopViewport* viewport) {
+  viewport->ScaleDesktop(pivot_x, pivot_y, scale);
+}
+
+void DirectInputStrategy::HandlePan(float translation_x,
+                                    float translation_y,
+                                    bool is_dragging_mode,
+                                    DesktopViewport* viewport) {
+  if (is_dragging_mode) {
+    // If the user is dragging something, we should synchronize the movement
+    // with the object that the user is trying to move on the desktop, rather
+    // than moving the desktop around.
+    ViewMatrix::Vector2D viewport_movement =
+        viewport->GetTransformation().Invert().MapVector(
+            {translation_x, translation_y});
+    viewport->MoveViewport(viewport_movement.x, viewport_movement.y);
+    return;
+  }
+
+  viewport->MoveDesktop(translation_x, translation_y);
+}
+
+void DirectInputStrategy::FindCursorPositions(float touch_x,
+                                              float touch_y,
+                                              const DesktopViewport& viewport,
+                                              float* cursor_x,
+                                              float* cursor_y) {
+  ViewMatrix::Point cursor_position =
+      viewport.GetTransformation().Invert().MapPoint({touch_x, touch_y});
+  *cursor_x = cursor_position.x;
+  *cursor_y = cursor_position.y;
+}
+
+bool DirectInputStrategy::IsCursorVisible() const {
+  return false;
+}
+
+}  // namespace remoting