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

ash/common/wm/focus_rules.cc

-// Copyright 2016 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/focus_rules.h"
-
-#include "ash/common/shell_delegate.h"
-#include "ash/common/wm/window_state.h"
-#include "ash/common/wm_shell.h"
-#include "ash/common/wm_window.h"
-#include "ash/public/cpp/shell_window_ids.h"
-
-namespace ash {
-
-bool IsToplevelWindow(WmWindow* window) {
-  DCHECK(window);
-  // The window must in a valid hierarchy.
-  if (!window->GetRootWindow())
-    return false;
-
-  // The window must exist within a container that supports activation.
-  // The window cannot be blocked by a modal transient.
-  return IsActivatableShellWindowId(window->GetParent()->GetShellWindowId());
-}
-
-bool IsWindowConsideredActivatable(WmWindow* window) {
-  DCHECK(window);
-  // Only toplevel windows can be activated.
-  if (!IsToplevelWindow(window))
-    return false;
-
-  // The window must be visible.
-  return IsWindowConsideredVisibleForActivation(window);
-}
-
-bool IsWindowConsideredVisibleForActivation(WmWindow* window) {
-  DCHECK(window);
-  // If the |window| doesn't belong to the current active user and also doesn't
-  // show for the current active user, then it should not be activated.
-  if (!WmShell::Get()->delegate()->CanShowWindowForUser(window))
-    return false;
-
-  if (window->IsVisible())
-    return true;
-
-  // Minimized windows are hidden in their minimized state, but they can always
-  // be activated.
-  if (window->GetWindowState()->IsMinimized())
-    return true;
-
-  if (!window->GetTargetVisibility())
-    return false;
-
-  const int parent_shell_window_id = window->GetParent()->GetShellWindowId();
-  return parent_shell_window_id == kShellWindowId_DefaultContainer ||
-         parent_shell_window_id == kShellWindowId_LockScreenContainer;
-}
-
-}  // namespace ash