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// Copyright (c) 2013 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/base/touch/touch_device.h"
#include "base/logging.h"
#include "ui/events/devices/device_data_manager.h"
namespace ui {
bool IsTouchDevicePresent() {
// TODO(sadrul@chromium.org): Support evdev hotplugging.
return ui::DeviceDataManager::GetInstance()->touchscreen_devices().size() > 0;
}
int MaxTouchPoints() {
// Hard-code this to 11 until we have a real implementation.
return 11;
}
// TODO(mustaq@chromium.org): Use mouse detection logic. crbug.com/440503
int GetAvailablePointerTypes() {
// Assume a mouse is there
int available_pointer_types = POINTER_TYPE_FINE;
if (IsTouchDevicePresent())
available_pointer_types |= POINTER_TYPE_COARSE;
DCHECK(available_pointer_types);
return available_pointer_types;
}
PointerType GetPrimaryPointerType() {
int available_pointer_types = GetAvailablePointerTypes();
if (available_pointer_types & POINTER_TYPE_FINE)
return POINTER_TYPE_FINE;
if (available_pointer_types & POINTER_TYPE_COARSE)
return POINTER_TYPE_COARSE;
DCHECK_EQ(available_pointer_types, POINTER_TYPE_NONE);
return POINTER_TYPE_NONE;
}
// TODO(mustaq@chromium.org): Use mouse detection logic. crbug.com/440503
int GetAvailableHoverTypes() {
// Assume a mouse is there
int available_hover_types = HOVER_TYPE_HOVER;
if (IsTouchDevicePresent())
available_hover_types |= HOVER_TYPE_ON_DEMAND;
DCHECK(available_hover_types);
return available_hover_types;
}
HoverType GetPrimaryHoverType() {
int available_hover_types = GetAvailableHoverTypes();
if (available_hover_types & HOVER_TYPE_HOVER)
return HOVER_TYPE_HOVER;
if (available_hover_types & HOVER_TYPE_ON_DEMAND)
return HOVER_TYPE_ON_DEMAND;
DCHECK_EQ(available_hover_types, HOVER_TYPE_NONE);
return HOVER_TYPE_NONE;
}
} // namespace ui
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