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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/accessibility/chromevox/key_accessibility_enabler.h"
#include "ash/accessibility/chromevox/spoken_feedback_enabler.h"
#include "ash/shell.h"
#include "ash/system/power/power_button_screenshot_controller.h"
#include "ui/display/screen.h"
#include "ui/events/base_event_utils.h"
#include "ui/events/event.h"
namespace ash {
KeyAccessibilityEnabler::KeyAccessibilityEnabler() {
Shell::Get()->AddAccessibilityEventHandler(
this, AccessibilityEventHandlerManager::HandlerType::kChromeVox);
}
KeyAccessibilityEnabler::~KeyAccessibilityEnabler() {
Shell::Get()->RemoveAccessibilityEventHandler(this);
}
void KeyAccessibilityEnabler::OnKeyEvent(ui::KeyEvent* event) {
if ((event->type() != ui::EventType::kKeyPressed &&
event->type() != ui::EventType::kKeyReleased) ||
!display::Screen::GetScreen()->InTabletMode()) {
return;
}
if (event->key_code() == ui::VKEY_VOLUME_DOWN) {
vol_down_pressed_ = event->type() == ui::EventType::kKeyPressed;
} else if (event->key_code() == ui::VKEY_VOLUME_UP) {
vol_up_pressed_ = event->type() == ui::EventType::kKeyPressed;
} else {
other_key_pressed_ = event->type() == ui::EventType::kKeyPressed;
}
if (vol_down_pressed_ && vol_up_pressed_ && !other_key_pressed_) {
if (!spoken_feedback_enabler_.get()) {
spoken_feedback_enabler_ = std::make_unique<SpokenFeedbackEnabler>();
first_time_both_volume_keys_pressed_ = ui::EventTimeForNow();
}
if (ui::EventTimeForNow() - first_time_both_volume_keys_pressed_ >
PowerButtonScreenshotController::kScreenshotChordDelay) {
event->StopPropagation();
}
} else if (spoken_feedback_enabler_.get()) {
spoken_feedback_enabler_.reset();
}
}
} // namespace ash
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