ozone: Handle pressure and tilt for stylus devices

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 "base/message_loop/message_loop.h"
@@ skipping 16 matching lines @@
                           info.device_type(),
                           info.name(),
                           info.vendor_id(),
                           info.product_id()),
       cursor_(cursor),
       dispatcher_(dispatcher) {
   x_abs_min_ = info.GetAbsMinimum(ABS_X);
   x_abs_range_ = info.GetAbsMaximum(ABS_X) - x_abs_min_ + 1;
   y_abs_min_ = info.GetAbsMinimum(ABS_Y);
   y_abs_range_ = info.GetAbsMaximum(ABS_Y) - y_abs_min_ + 1;
+
+  tilt_x_max_ = info.GetAbsMaximum(ABS_TILT_X);
+  tilt_y_max_ = info.GetAbsMaximum(ABS_TILT_Y);
+  pressure_max_ = info.GetAbsMaximum(ABS_PRESSURE);
 }
 
 TabletEventConverterEvdev::~TabletEventConverterEvdev() {
 }
 
 void TabletEventConverterEvdev::OnFileCanReadWithoutBlocking(int fd) {
   TRACE_EVENT1("evdev",
                "TabletEventConverterEvdev::OnFileCanReadWithoutBlocking", "fd",
                fd);
 
@@ skipping 57 matching lines @@
 
   switch (input.code) {
     case ABS_X:
       x_abs_location_ = input.value;
       abs_value_dirty_ = true;
       break;
     case ABS_Y:
       y_abs_location_ = input.value;
       abs_value_dirty_ = true;
       break;
+    case ABS_TILT_X:
+      tilt_x_ = (90.0f * input.value) / tilt_x_max_;
+      abs_value_dirty_ = true;
+      break;
+    case ABS_TILT_Y:
+      tilt_y_ = (90.0f * input.value) / tilt_y_max_;
+      abs_value_dirty_ = true;
+      break;
+    case ABS_PRESSURE:
+      pressure_ = (float)input.value / pressure_max_;
+      abs_value_dirty_ = true;
+      break;
   }
 }
 
 void TabletEventConverterEvdev::UpdateCursor() {
   gfx::Rect confined_bounds = cursor_->GetCursorConfinedBounds();
 
   int x =
       ((x_abs_location_ - x_abs_min_) * confined_bounds.width()) / x_abs_range_;
   int y = ((y_abs_location_ - y_abs_min_) * confined_bounds.height()) /
           y_abs_range_;
@@ skipping 21 matching lines @@
 
   if (abs_value_dirty_) {
     UpdateCursor();
     abs_value_dirty_ = false;
   }
 
   bool down = input.value;
 
   dispatcher_->DispatchMouseButtonEvent(MouseButtonEventParams(
       input_device_.id, cursor_->GetLocation(), button, down,
-      false /* allow_remap */, TimeDeltaFromInputEvent(input)));
+      false /* allow_remap */,
+      PointerDetails(EventPointerType::POINTER_TYPE_PEN,
+                     /* radius_x */ 0.0f, /* radius_y */ 0.0f, pressure_,
+                     tilt_x_, tilt_y_),
+      TimeDeltaFromInputEvent(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, cursor_->GetLocation(),
-                           TimeDeltaFromInputEvent(input)));
+  dispatcher_->DispatchMouseMoveEvent(MouseMoveEventParams(
+      input_device_.id, cursor_->GetLocation(),
+      PointerDetails(EventPointerType::POINTER_TYPE_PEN,
+                     /* radius_x */ 0.0f, /* radius_y */ 0.0f, pressure_,
+                     tilt_x_, tilt_y_),
+      TimeDeltaFromInputEvent(input)));
 
   abs_value_dirty_ = false;
 }
 
 }  // namespace ui