Add POINTER_TYPE_ERASER to EventPointerType

ui/events/ozone/evdev/tablet_event_converter_evdev.cc

 // 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.
 
 #include "ui/events/ozone/evdev/tablet_event_converter_evdev.h"
 
 #include <errno.h>
 #include <linux/input.h>
 #include <stddef.h>
 
 #include "base/message_loop/message_loop.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/events/event.h"
 #include "ui/events/ozone/evdev/device_event_dispatcher_evdev.h"
 
 namespace ui {
 
 namespace {
 
 // Convert tilt from [min, min + num_values) to [-90deg, +90deg)
 float ScaleTilt(int value, int min_value, int num_values) {
   return 180.f * (value - min_value) / num_values - 90.f;
 }
 
+EventPointerType GetToolType(int button_tool) {
+  if (button_tool == BTN_TOOL_RUBBER)
+    return EventPointerType::POINTER_TYPE_ERASER;
+  return EventPointerType::POINTER_TYPE_PEN;
+}
+
 }  // namespace
 
 TabletEventConverterEvdev::TabletEventConverterEvdev(
     int fd,
     base::FilePath path,
     int id,
     CursorDelegateEvdev* cursor,
     const EventDeviceInfo& info,
     DeviceEventDispatcherEvdev* dispatcher)
     : EventConverterEvdev(fd,
@@ skipping 138 matching lines @@
   if (abs_value_dirty_) {
     UpdateCursor();
     abs_value_dirty_ = false;
   }
 
   bool down = input.value;
 
   dispatcher_->DispatchMouseButtonEvent(MouseButtonEventParams(
       input_device_.id, EF_NONE, cursor_->GetLocation(), button, down,
       false /* allow_remap */,
-      PointerDetails(EventPointerType::POINTER_TYPE_PEN,
+      PointerDetails(GetToolType(stylus_),
                      /* radius_x */ 0.0f, /* radius_y */ 0.0f, pressure_,
                      tilt_x_, tilt_y_),
       TimeTicksFromInputEvent(input)));
 }
 
 void TabletEventConverterEvdev::FlushEvents(const input_event& input) {
   if (!cursor_)
     return;
 
   // Prevent propagation of invalid data on stylus lift off
   if (stylus_ == 0) {
     abs_value_dirty_ = false;
     return;
   }
 
   if (!abs_value_dirty_)
     return;
 
   UpdateCursor();
 
   dispatcher_->DispatchMouseMoveEvent(MouseMoveEventParams(
       input_device_.id, EF_NONE, cursor_->GetLocation(),
-      PointerDetails(EventPointerType::POINTER_TYPE_PEN,
+      PointerDetails(GetToolType(stylus_),
                      /* radius_x */ 0.0f, /* radius_y */ 0.0f, pressure_,
                      tilt_x_, tilt_y_),
       TimeTicksFromInputEvent(input)));
 
   abs_value_dirty_ = false;
 }
 
 }  // namespace ui