1 files changed, 51 insertions, 0 deletions
diff --git a/chromium/ui/events/ozone/evdev/touch_filter/neural_stylus_palm_report_filter.h b/chromium/ui/events/ozone/evdev/touch_filter/neural_stylus_palm_report_filter.h
new file mode 100644
index 00000000000..1c7e28b8e5a
--- /dev/null
+++ b/chromium/ui/events/ozone/evdev/touch_filter/neural_stylus_palm_report_filter.h
@@ -0,0 +1,51 @@
+// Copyright 2019 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_FILTER_NEURAL_STYLUS_PALM_REPORT_FILTER_H_
+#define UI_EVENTS_OZONE_EVDEV_TOUCH_FILTER_NEURAL_STYLUS_PALM_REPORT_FILTER_H_
+
+#include <bitset>
+#include <vector>
+
+#include "base/component_export.h"
+#include "base/time/time.h"
+#include "ui/events/ozone/evdev/event_device_info.h"
+#include "ui/events/ozone/evdev/touch_evdev_types.h"
+#include "ui/events/ozone/evdev/touch_filter/palm_detection_filter.h"
+#include "ui/events/ozone/evdev/touch_filter/shared_palm_detection_filter_state.h"
+
+namespace ui {
+
+// A palm detection filter that doesn't change any reports, but adds UMA reports
+// based on the shared palm state. Otherwise behaves identically to
+// OpenPalmDetectionFilter.
+class COMPONENT_EXPORT(EVDEV) NeuralStylusReportFilter
+    : public PalmDetectionFilter {
+ public:
+  explicit NeuralStylusReportFilter(
+      SharedPalmDetectionFilterState* shared_palm_state);
+  ~NeuralStylusReportFilter() override;
+
+  static bool CompatibleWithNeuralStylusReportFilter(
+      const EventDeviceInfo& devinfo);
+
+  void Filter(const std::vector<InProgressTouchEvdev>& touches,
+              base::TimeTicks time,
+              std::bitset<kNumTouchEvdevSlots>* slots_to_hold,
+              std::bitset<kNumTouchEvdevSlots>* slots_to_suppress) override;
+
+  static const char kFilterName[];
+  static const char kNeuralFingerAge[];
+  static const char kNeuralPalmAge[];
+  static const char kNeuralPalmTouchCount[];
+  std::string FilterNameForTesting() const override;
+
+ private:
+  bool previous_update_ = false;
+  DISALLOW_COPY_AND_ASSIGN(NeuralStylusReportFilter);
+};
+
+}  // namespace ui
+
+#endif  // UI_EVENTS_OZONE_EVDEV_TOUCH_FILTER_NEURAL_STYLUS_PALM_REPORT_FILTER_H_