| // Copyright 2021 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/ui/lacros/window_utility.h" |
| |
| #include "ui/aura/window.h" |
| #include "ui/aura/window_tree_host.h" |
| #include "ui/aura/window_tree_host_platform.h" |
| #include "ui/platform_window/platform_window.h" |
| |
| namespace lacros_window_utility { |
| |
| std::string GetRootWindowUniqueId(aura::Window* window) { |
| DCHECK(window); |
| |
| // On desktop aura there is one WindowTreeHost per top-level window. |
| aura::WindowTreeHost* window_tree_host = window->GetRootWindow()->GetHost(); |
| DCHECK(window_tree_host); |
| |
| // Lacros is based on Ozone/Wayland, which uses PlatformWindow and |
| // aura::WindowTreeHostPlatform. |
| aura::WindowTreeHostPlatform* window_tree_host_platform = |
| static_cast<aura::WindowTreeHostPlatform*>(window_tree_host); |
| return window_tree_host_platform->platform_window()->GetWindowUniqueId(); |
| } |
| |
| } // namespace lacros_window_utility |
