chromeos: Move files in //ash/common to //ash, part 2

ash/common/wm/always_on_top_controller.cc

-// Copyright (c) 2012 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/common/wm/always_on_top_controller.h"
-
-#include "ash/common/wm/workspace/workspace_layout_manager.h"
-#include "ash/common/wm_window.h"
-#include "ash/public/cpp/shell_window_ids.h"
-#include "base/memory/ptr_util.h"
-#include "ui/aura/client/aura_constants.h"
-#include "ui/aura/window.h"
-
-namespace ash {
-
-AlwaysOnTopController::AlwaysOnTopController(WmWindow* viewport)
-    : always_on_top_container_(viewport) {
-  DCHECK_NE(kShellWindowId_DefaultContainer, viewport->GetShellWindowId());
-  always_on_top_container_->SetLayoutManager(
-      base::MakeUnique<WorkspaceLayoutManager>(viewport));
-  // Container should be empty.
-  DCHECK(always_on_top_container_->GetChildren().empty());
-  always_on_top_container_->aura_window()->AddObserver(this);
-}
-
-AlwaysOnTopController::~AlwaysOnTopController() {
-  if (always_on_top_container_)
-    always_on_top_container_->aura_window()->RemoveObserver(this);
-}
-
-WmWindow* AlwaysOnTopController::GetContainer(WmWindow* window) const {
-  DCHECK(always_on_top_container_);
-  if (window->aura_window()->GetProperty(aura::client::kAlwaysOnTopKey))
-    return always_on_top_container_;
-  return always_on_top_container_->GetRootWindow()->GetChildByShellWindowId(
-      kShellWindowId_DefaultContainer);
-}
-
-// TODO(rsadam@): Refactor so that this cast is unneeded.
-WorkspaceLayoutManager* AlwaysOnTopController::GetLayoutManager() const {
-  return static_cast<WorkspaceLayoutManager*>(
-      always_on_top_container_->GetLayoutManager());
-}
-
-void AlwaysOnTopController::SetLayoutManagerForTest(
-    std::unique_ptr<WorkspaceLayoutManager> layout_manager) {
-  always_on_top_container_->SetLayoutManager(std::move(layout_manager));
-}
-
-void AlwaysOnTopController::OnWindowHierarchyChanged(
-    const HierarchyChangeParams& params) {
-  if (WmWindow::Get(params.old_parent) == always_on_top_container_)
-    params.target->RemoveObserver(this);
-  else if (WmWindow::Get(params.new_parent) == always_on_top_container_)
-    params.target->AddObserver(this);
-}
-
-void AlwaysOnTopController::OnWindowPropertyChanged(aura::Window* window,
-                                                    const void* key,
-                                                    intptr_t old) {
-  if (WmWindow::Get(window) != always_on_top_container_ &&
-      key == aura::client::kAlwaysOnTopKey) {
-    DCHECK(window->type() == ui::wm::WINDOW_TYPE_NORMAL ||
-           window->type() == ui::wm::WINDOW_TYPE_POPUP);
-    WmWindow* container = GetContainer(WmWindow::Get(window));
-    if (WmWindow::Get(window->parent()) != container)
-      container->AddChild(WmWindow::Get(window));
-  }
-}
-
-void AlwaysOnTopController::OnWindowDestroying(aura::Window* window) {
-  if (WmWindow::Get(window) == always_on_top_container_) {
-    always_on_top_container_->aura_window()->RemoveObserver(this);
-    always_on_top_container_ = nullptr;
-  }
-}
-
-}  // namespace ash