ui/base/touch/touch_device_linux.cc

   1 // Copyright (c) 2013 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 #include "ui/base/touch/touch_device.h"
   6
   7 #include "base/logging.h"
   8 #include "ui/events/devices/device_data_manager.h"
   9
  10 namespace ui {
  11
  12 bool IsTouchDevicePresent() {
  13   return ui::DeviceDataManager::GetInstance()->touchscreen_devices().size() > 0;
  14 }
  15
  16 int MaxTouchPoints() {
  17   int max_touch = 0;
  18   const std::vector<ui::TouchscreenDevice>& touchscreen_devices =
  19       ui::DeviceDataManager::GetInstance()->touchscreen_devices();
  20   for (const ui::TouchscreenDevice& device : touchscreen_devices) {
  21     if (device.touch_points > max_touch)
  22       max_touch = device.touch_points;
  23   }
  24   return max_touch;
  25 }
  26
  27 // TODO(mustaq@chromium.org): Use mouse detection logic. crbug.com/495634
  28 int GetAvailablePointerTypes() {
  29   // Assume a mouse is there
  30   int available_pointer_types = POINTER_TYPE_FINE;
  31   if (IsTouchDevicePresent())
  32     available_pointer_types |= POINTER_TYPE_COARSE;
  33
  34   DCHECK(available_pointer_types);
  35   return available_pointer_types;
  36 }
  37
  38 PointerType GetPrimaryPointerType() {
  39   int available_pointer_types = GetAvailablePointerTypes();
  40   if (available_pointer_types & POINTER_TYPE_FINE)
  41     return POINTER_TYPE_FINE;
  42   if (available_pointer_types & POINTER_TYPE_COARSE)
  43     return POINTER_TYPE_COARSE;
  44   DCHECK_EQ(available_pointer_types, POINTER_TYPE_NONE);
  45   return POINTER_TYPE_NONE;
  46 }
  47
  48 // TODO(mustaq@chromium.org): Use mouse detection logic. crbug.com/495634
  49 int GetAvailableHoverTypes() {
  50   // Assume a mouse is there
  51   int available_hover_types = HOVER_TYPE_HOVER;
  52   if (IsTouchDevicePresent())
  53     available_hover_types |= HOVER_TYPE_ON_DEMAND;
  54
  55   DCHECK(available_hover_types);
  56   return available_hover_types;
  57 }
  58
  59 HoverType GetPrimaryHoverType() {
  60   int available_hover_types = GetAvailableHoverTypes();
  61   if (available_hover_types & HOVER_TYPE_HOVER)
  62     return HOVER_TYPE_HOVER;
  63   if (available_hover_types & HOVER_TYPE_ON_DEMAND)
  64     return HOVER_TYPE_ON_DEMAND;
  65   DCHECK_EQ(available_hover_types, HOVER_TYPE_NONE);
  66   return HOVER_TYPE_NONE;
  67 }
  68
  69 }  // namespace ui