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| 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 = -1; | |
| 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/440503 | |
| 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/440503 | |
| 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 | |
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