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// Copyright 2020 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/shell_tab_handler.h"
#include "ash/capture_mode/capture_mode_util.h"
#include "ash/focus/focus_cycler.h"
#include "ash/shelf/shelf.h"
#include "ash/shelf/shelf_navigation_widget.h"
#include "ash/shell.h"
#include "ash/system/status_area_widget.h"
#include "ash/wm/tablet_mode/tablet_mode_controller.h"
#include "ash/wm/window_util.h"
#include "ui/display/screen.h"
#include "ui/events/event.h"
#include "ui/wm/public/activation_client.h"
namespace ash {
void ShellTabHandler::OnKeyEvent(ui::KeyEvent* key_event) {
// Only focus the shelf if the device is in clamshell mode, and the user
// pressed tab.
if (key_event->key_code() != ui::KeyboardCode::VKEY_TAB ||
key_event->type() != ui::EventType::kKeyPressed ||
key_event->IsAltDown() || key_event->IsControlDown() ||
key_event->IsCommandDown() ||
display::Screen::GetScreen()->InTabletMode()) {
return;
}
// Capture session will process their own tab events.
if (capture_mode_util::IsCaptureModeActive())
return;
aura::Window* root_window_for_new_windows =
Shell::GetRootWindowForNewWindows();
if (!root_window_for_new_windows || window_util::GetActiveWindow())
return;
// If there is no active window, focus the HomeButton or StatusWidget,
// depending on whether this is Tab or Shift + Tab. This will allow the
// users focus to traverse the shelf.
auto* shelf = Shelf::ForWindow(root_window_for_new_windows);
views::Widget* status_area_widget = shelf->status_area_widget();
views::Widget* navigation_widget = shelf->navigation_widget();
shell_->focus_cycler()->FocusWidget(
key_event->IsShiftDown() ? status_area_widget : navigation_widget);
key_event->SetHandled();
key_event->StopPropagation();
}
} // namespace ash
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