remoting/client/touch_input_scaler.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef REMOTING_CLIENT_TOUCH_INPUT_SCALER_H_
   6 #define REMOTING_CLIENT_TOUCH_INPUT_SCALER_H_
   7
   8 #include "remoting/protocol/input_filter.h"
   9 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
  10
  11 namespace remoting {
  12
  13 namespace protocol {
  14 class TouchEvent;
  15 }  // namespace protocol
  16
  17 // Scales the touch input coordinates to host coordinates and clamps so
  18 // that the values do not go outside the remote desktop.
  19 // Also resizes the touch size.
  20 class TouchInputScaler : public protocol::InputFilter {
  21  public:
  22   TouchInputScaler() = default;
  23   explicit TouchInputScaler(InputStub* input_stub);
  24   ~TouchInputScaler() override;
  25
  26   // Set input and output desktop sizes.
  27   void set_input_size(const webrtc::DesktopSize& size) {
  28     input_size_.set(size.width() - 1, size.height() - 1);
  29   }
  30   void set_output_size(const webrtc::DesktopSize& size) {
  31     output_size_.set(size.width() - 1, size.height() - 1);
  32   }
  33
  34   // protocol::InputStub interface.
  35   void InjectTouchEvent(const protocol::TouchEvent& event) override;
  36
  37  private:
  38   // Sizes for scaling and clamping coordinates and sizes.
  39   // These hold the max-X,Y coordinates and not the actual width and height.
  40   webrtc::DesktopSize input_size_;
  41   webrtc::DesktopSize output_size_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(TouchInputScaler);
  44 };
  45
  46 }  // namespace remoting
  47
  48 #endif  // REMOTING_CLIENT_TOUCH_INPUT_SCALER_H_