Move files from ui/views/corewm to ui/wm/core

ui/views/corewm/transient_window_manager.h

-// Copyright 2014 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.
-
-#ifndef UI_VIEWS_COREWM_TRANSIENT_WINDOW_MANAGER_H_
-#define UI_VIEWS_COREWM_TRANSIENT_WINDOW_MANAGER_H_
-
-#include <vector>
-
-#include "base/observer_list.h"
-#include "ui/aura/window_observer.h"
-#include "ui/views/views_export.h"
-
-namespace views {
-namespace corewm {
-
-class TransientWindowObserver;
-
-// TransientWindowManager manages the set of transient children for a window
-// along with the transient parent. Transient children get the following
-// behavior:
-// . The transient parent destroys any transient children when it is
-//   destroyed. This means a transient child is destroyed if either its parent
-//   or transient parent is destroyed.
-// . If a transient child and its transient parent share the same parent, then
-//   transient children are always ordered above the transient parent.
-// Transient windows are typically used for popups and menus.
-// TODO(sky): when we nuke TransientWindowClient rename this to
-// TransientWindowController.
-class VIEWS_EXPORT TransientWindowManager : public aura::WindowObserver {
- public:
-  typedef std::vector<aura::Window*> Windows;
-
-  virtual ~TransientWindowManager();
-
-  // Returns the TransientWindowManager for |window|. This never returns NULL.
-  static TransientWindowManager* Get(aura::Window* window);
-
-  // Returns the TransientWindowManager for |window| only if it already exists.
-  // WARNING: this may return NULL.
-  static const TransientWindowManager* Get(const aura::Window* window);
-
-  void AddObserver(TransientWindowObserver* observer);
-  void RemoveObserver(TransientWindowObserver* observer);
-
-  // Adds or removes a transient child.
-  void AddTransientChild(aura::Window* child);
-  void RemoveTransientChild(aura::Window* child);
-
-  const Windows& transient_children() const { return transient_children_; }
-
-  aura::Window* transient_parent() { return transient_parent_; }
-  const aura::Window* transient_parent() const { return transient_parent_; }
-
-  // Returns true if in the process of stacking |child| on top of |target|. That
-  // is, when the stacking order of a window changes (OnWindowStackingChanged())
-  // the transients may get restacked as well. This function can be used to
-  // detect if TransientWindowManager is in the process of stacking a transient
-  // as the result of window stacking changing.
-  bool IsStackingTransient(const aura::Window* child,
-                           const aura::Window* target) const;
-
- private:
-  // Used to identify when a stacking change needs to restack transients.
-  struct StackingPair {
-    StackingPair(const aura::Window* child, const aura::Window* target)
-        : child(child),
-          target(target) {}
-
-    // The window being moved.
-    const aura::Window* child;
-
-    // |child| is being stacked on top of this.
-    const aura::Window* target;
-  };
-
-  explicit TransientWindowManager(aura::Window* window);
-
-  // Invoked whne |child|'s stacking order changes.
-  void OnChildStackingChanged(aura::Window* child);
-
-  // WindowObserver:
-  virtual void OnWindowVisibilityChanging(aura::Window* window,
-                                          bool visible) OVERRIDE;
-  virtual void OnWindowStackingChanged(aura::Window* window) OVERRIDE;
-  virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
-
-  aura::Window* window_;
-  aura::Window* transient_parent_;
-  Windows transient_children_;
-
-  // If non-null we're actively restacking transient as the result of a
-  // transient ancestor changing. This is a pointer to a value on the stack.
-  StackingPair* stacking_pair_;
-
-  ObserverList<TransientWindowObserver> observers_;
-
-  DISALLOW_COPY_AND_ASSIGN(TransientWindowManager);
-};
-
-}  // namespace corewm
-}  // namespace views
-
-#endif  // UI_VIEWS_COREWM_TRANSIENT_WINDOW_MANAGER_H_