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- // Copyright 2018 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 "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 "ash/wm/tablet_mode/tablet_mode_controller.h"
- #include "ui/events/base_event_utils.h"
- #include "ui/events/event.h"
- namespace ash {
- KeyAccessibilityEnabler::KeyAccessibilityEnabler() {
- Shell::Get()->AddPreTargetHandler(this,
- ui::EventTarget::Priority::kAccessibility);
- }
- KeyAccessibilityEnabler::~KeyAccessibilityEnabler() {
- Shell::Get()->RemovePreTargetHandler(this);
- }
- void KeyAccessibilityEnabler::OnKeyEvent(ui::KeyEvent* event) {
- if ((event->type() != ui::ET_KEY_PRESSED &&
- event->type() != ui::ET_KEY_RELEASED) ||
- !Shell::Get()->tablet_mode_controller()->InTabletMode())
- return;
- if (event->key_code() == ui::VKEY_VOLUME_DOWN)
- vol_down_pressed_ = event->type() == ui::ET_KEY_PRESSED;
- else if (event->key_code() == ui::VKEY_VOLUME_UP)
- vol_up_pressed_ = event->type() == ui::ET_KEY_PRESSED;
- else
- other_key_pressed_ = event->type() == ui::ET_KEY_PRESSED;
- 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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