Add palm suppression feature to EventConverterEvdev

ui/events/ozone/evdev/touch_event_converter_evdev.h

 // Copyright 2014 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 UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_
 #define UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 27 matching lines @@
  public:
   TouchEventConverterEvdev(int fd,
                            base::FilePath path,
                            int id,
                            const EventDeviceInfo& devinfo,
                            DeviceEventDispatcherEvdev* dispatcher);
   ~TouchEventConverterEvdev() override;
 
   // EventConverterEvdev:
   bool HasTouchscreen() const override;
+  bool HasPen() const override;
   gfx::Size GetTouchscreenSize() const override;
   int GetTouchPoints() const override;
   void OnEnabled() override;
   void OnDisabled() override;
 
   void DumpTouchEventLog(const char* filename) override;
 
   // Update touch event logging state
   void SetTouchEventLoggingEnabled(bool enabled) override;
 
+  // Sets callback to enable/disable palm suppression.
+  void SetPalmSuppressionCallback(
+      const base::Callback<void(bool)>& callback) override;
+
   // Unsafe part of initialization.
   virtual void Initialize(const EventDeviceInfo& info);
 
  private:
   friend class MockTouchEventConverterEvdev;
 
   // Overidden from base::MessagePumpLibevent::Watcher.
   void OnFileCanReadWithoutBlocking(int fd) override;
 
   virtual void Reinitialize();
@@ skipping 29 matching lines @@
 
   // Dispatcher for events.
   DeviceEventDispatcherEvdev* dispatcher_;
 
   // Set if we drop events in kernel (SYN_DROPPED) or in process.
   bool dropped_events_ = false;
 
   // Device has multitouch capability.
   bool has_mt_ = false;
 
+  // Device supports pen input.
+  bool has_pen_ = false;
+
   // Use BTN_LEFT instead of BT_TOUCH.
   bool quirk_left_mouse_button_ = false;
 
   // Pressure values.
   int pressure_min_;
   int pressure_max_;  // Used to normalize pressure values.
 
   // Input range for x-axis.
   float x_min_tuxels_;
   float x_num_tuxels_;
 
   // Input range for y-axis.
   float y_min_tuxels_;
   float y_num_tuxels_;
 
   // Number of touch points reported by driver
   int touch_points_ = 0;
 
+  // Maximum value of touch major axis
+  int major_max_ = 0;
+
   // Tracking id counter.
   int next_tracking_id_ = 0;
 
   // Touch point currently being updated from the /dev/input/event* stream.
   size_t current_slot_ = 0;
 
   // Flag that indicates if the touch logging enabled or not.
   bool touch_logging_enabled_ = true;
 
   // In-progress touch points.
   std::vector<InProgressTouchEvdev> events_;
 
   // Finds touch noise.
   std::unique_ptr<TouchNoiseFinder> touch_noise_finder_;
 
   // Records the recent touch events. It is used to fill the feedback reports
   TouchEventLogEvdev touch_evdev_debug_buffer_;
 
+  // Callback to enable/disable palm suppression.
+  base::Callback<void(bool)> enable_palm_suppression_callback_;
+
   DISALLOW_COPY_AND_ASSIGN(TouchEventConverterEvdev);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_