Moves more code to ash/wm/common

ash/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/wm/always_on_top_controller.h"
-
-#include "ash/wm/common/wm_shell_window_ids.h"
-#include "ash/wm/common/wm_window.h"
-#include "ash/wm/common/wm_window_property.h"
-#include "ash/wm/common/workspace/workspace_layout_manager_delegate.h"
-#include "ash/wm/workspace/workspace_layout_manager.h"
-#include "base/memory/ptr_util.h"
-
-namespace ash {
-
-AlwaysOnTopController::AlwaysOnTopController(wm::WmWindow* viewport)
-    : always_on_top_container_(viewport) {
-  always_on_top_container_->SetLayoutManager(
-      base::WrapUnique(new WorkspaceLayoutManager(viewport, nullptr)));
-  // Container should be empty.
-  DCHECK(always_on_top_container_->GetChildren().empty());
-  always_on_top_container_->AddObserver(this);
-}
-
-AlwaysOnTopController::~AlwaysOnTopController() {
-  if (always_on_top_container_)
-    always_on_top_container_->RemoveObserver(this);
-}
-
-wm::WmWindow* AlwaysOnTopController::GetContainer(wm::WmWindow* window) const {
-  DCHECK(always_on_top_container_);
-  if (window->GetBoolProperty(wm::WmWindowProperty::ALWAYS_ON_TOP))
-    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::OnWindowTreeChanged(
-    wm::WmWindow* window,
-    const TreeChangeParams& params) {
-  if (params.old_parent == always_on_top_container_)
-    params.target->RemoveObserver(this);
-  else if (params.new_parent == always_on_top_container_)
-    params.target->AddObserver(this);
-}
-
-void AlwaysOnTopController::OnWindowPropertyChanged(
-    wm::WmWindow* window,
-    wm::WmWindowProperty property,
-    intptr_t old) {
-  if (window != always_on_top_container_ &&
-      property == wm::WmWindowProperty::ALWAYS_ON_TOP) {
-    DCHECK(window->GetType() == ui::wm::WINDOW_TYPE_NORMAL ||
-           window->GetType() == ui::wm::WINDOW_TYPE_POPUP);
-    wm::WmWindow* container = GetContainer(window);
-    if (window->GetParent() != container)
-      container->AddChild(window);
-  }
-}
-
-void AlwaysOnTopController::OnWindowDestroying(wm::WmWindow* window) {
-  if (window == always_on_top_container_) {
-    always_on_top_container_->RemoveObserver(this);
-    always_on_top_container_ = nullptr;
-  }
-}
-
-}  // namespace ash