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.
5 #include "chrome/browser/chromeos/events/keyboard_driven_event_rewriter.h"
9 #include "chrome/browser/chromeos/login/user_manager.h"
10 #include "chrome/browser/chromeos/system/input_device_settings.h"
11 #include "ui/events/event_utils.h"
17 const int kModifierMask = ui::EF_SHIFT_DOWN;
19 // Returns true if and only if it is on login screen (i.e. user is not logged
20 // in) and the keyboard driven flag in the OEM manifest is on.
21 bool ShouldStripModifiersForArrowKeysAndEnter() {
22 if (UserManager::IsInitialized() &&
23 !UserManager::Get()->IsUserLoggedIn()) {
24 return system::InputDeviceSettings::Get()
25 ->ForceKeyboardDrivenUINavigation();
33 KeyboardDrivenEventRewriter::KeyboardDrivenEventRewriter() {}
35 KeyboardDrivenEventRewriter::~KeyboardDrivenEventRewriter() {}
37 bool KeyboardDrivenEventRewriter::RewriteIfKeyboardDrivenOnLoginScreen(
39 if (!ShouldStripModifiersForArrowKeysAndEnter())
42 return RewriteEvent(event);
45 bool KeyboardDrivenEventRewriter::RewriteForTesting(XEvent* event) {
46 return RewriteEvent(event);
49 bool KeyboardDrivenEventRewriter::RewriteEvent(XEvent* event) {
50 int flags = ui::EventFlagsFromNative(event);
51 if ((flags & kModifierMask) != kModifierMask)
53 ui::KeyboardCode key_code = ui::KeyboardCodeFromNative(event);
55 if (key_code != ui::VKEY_LEFT &&
56 key_code != ui::VKEY_RIGHT &&
57 key_code != ui::VKEY_UP &&
58 key_code != ui::VKEY_DOWN &&
59 key_code != ui::VKEY_RETURN &&
60 key_code != ui::VKEY_F6) {
64 XKeyEvent* xkey = &(event->xkey);
65 xkey->state &= ~(ControlMask | Mod1Mask | ShiftMask);
69 } // namespace chromeos