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// Copyright 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 "chrome/browser/chromeos/keyboard_driven_event_rewriter.h"
#include <X11/Xlib.h>
#include "chrome/browser/chromeos/login/user_manager.h"
#include "chrome/browser/chromeos/system/input_device_settings.h"
#include "ui/events/event.h"
namespace chromeos {
namespace {
const int kModifierMask = ui::EF_SHIFT_DOWN;
// Returns true if and only if it is on login screen (i.e. user is not logged
// in) and the keyboard driven flag in the OEM manifest is on.
bool ShouldStripModifiersForArrowKeysAndEnter() {
if (UserManager::IsInitialized() &&
!UserManager::Get()->IsUserLoggedIn()) {
return system::keyboard_settings::ForceKeyboardDrivenUINavigation();
}
return false;
}
} // namespace
KeyboardDrivenEventRewriter::KeyboardDrivenEventRewriter() {}
KeyboardDrivenEventRewriter::~KeyboardDrivenEventRewriter() {}
bool KeyboardDrivenEventRewriter::RewriteIfKeyboardDrivenOnLoginScreen(
ui::KeyEvent* event) {
if (!ShouldStripModifiersForArrowKeysAndEnter())
return false;
return RewriteEvent(event);
}
bool KeyboardDrivenEventRewriter::RewriteForTesting(ui::KeyEvent* event) {
return RewriteEvent(event);
}
bool KeyboardDrivenEventRewriter::RewriteEvent(ui::KeyEvent* event) {
if ((event->flags() & kModifierMask) != kModifierMask)
return false;
if (event->key_code() != ui::VKEY_LEFT &&
event->key_code() != ui::VKEY_RIGHT &&
event->key_code() != ui::VKEY_UP &&
event->key_code() != ui::VKEY_DOWN &&
event->key_code() != ui::VKEY_RETURN &&
event->key_code() != ui::VKEY_F6) {
return false;
}
XEvent* xev = event->native_event();
XKeyEvent* xkey = &(xev->xkey);
xkey->state &= ~(ControlMask | Mod1Mask | ShiftMask);
event->set_flags(event->flags() & ~kModifierMask);
event->NormalizeFlags();
return true;
}
} // namespace chromeos
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