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1 // Copyright 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_enabled.h"
6 #include "base/command_line.h"
7 #include "base/logging.h"
8 #include "ui/base/touch/touch_device.h"
9 #include "ui/base/ui_base_switches.h"
10 #include "ui/events/event_switches.h"
11 
12 namespace ui {
13 
AreTouchEventsEnabled()14 bool AreTouchEventsEnabled() {
15   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
16   const std::string touch_enabled_switch =
17       command_line.HasSwitch(switches::kTouchEvents) ?
18       command_line.GetSwitchValueASCII(switches::kTouchEvents) :
19       switches::kTouchEventsAuto;
20 
21   if (touch_enabled_switch.empty() ||
22       touch_enabled_switch == switches::kTouchEventsEnabled)
23     return true;
24   if (touch_enabled_switch == switches::kTouchEventsAuto)
25     return IsTouchDevicePresent();
26   if (touch_enabled_switch != switches::kTouchEventsDisabled)
27     LOG(ERROR) << "Invalid --touch-events option: " << touch_enabled_switch;
28   return false;
29 }
30 
31 }  // namespace ui
32