[CRD iOS] Inject mouse events to the host

remoting/client/input_strategy.h

+// 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.
+
+#ifndef REMOTING_CLIENT_INPUT_STRATEGY_H_
+#define REMOTING_CLIENT_INPUT_STRATEGY_H_
+
+namespace remoting {
+
+class DesktopViewport;
+
+// This is an interface used by GestureInterpreter to customize the way gestures
+// are handled.
+class InputStrategy {
+ public:
+  virtual ~InputStrategy() {}
+
+  // Called when the GestureInterpreter receives a pinch gesture. The
+  // implementation is responsible for modifying the viewport and observing the
+  // change.
+  virtual void HandlePinch(float pivot_x,
+                           float pivot_y,
+                           float scale,
+                           DesktopViewport* viewport) = 0;
+
+  // Called when the GestureInterpreter receives a pan gesture. The
+  // implementation is responsible for modifying the viewport and observing the
+  // change.
+  // is_dragging_mode: true if the user is trying to drag something while
+  //     panning on the screen.
+  virtual void HandlePan(float translation_x,
+                         float translation_y,
+                         bool is_dragging_mode,
+                         DesktopViewport* viewport) = 0;
+
+  // Called when a gesture is done at location (touch_x, touch_y) and the
+  // GestureInterpreter needs to get back the cursor position to inject mouse
+  // the mouse event.
+  virtual void FindCursorPositions(float touch_x,
+                                   float touch_y,
+                                   const DesktopViewport& viewport,
+                                   float* cursor_x,
+                                   float* cursor_y) = 0;
+
+  // Returns true if the input strategy maintains a visible cursor on the
+  // desktop.
+  virtual bool IsCursorVisible() const = 0;
+};
+
+}  // namespace remoting
+#endif  // REMOTING_CLIENT_INPUT_STRATEGY_H_