Revert 267158 "CleanUp: Introduce UserInfo. Move session_state s..."

> CleanUp: Introduce UserInfo. Move session_state stuff to ash/session.
> 
> BUG=None
> R=nkostylev@chromium.org
> TBR=sky@chromium.org
> 
> Review URL: https://codereview.chromium.org/253063002

TBR=oshima@chromium.org

Review URL: https://codereview.chromium.org/260783002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@267250 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 155 insertions, 0 deletions

diff --git a/ash/session_state_delegate.h b/ash/session_state_delegate.h
new file mode 100644
index 0000000..dcbd7f9
--- /dev/null
+++ b/ash/session_state_delegate.h
@@ -0,0 +1,155 @@
+// Copyright (c) 2013 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 ASH_SESSION_STATE_DELEGATE_H_
+#define ASH_SESSION_STATE_DELEGATE_H_
+
+#include <string>
+#include <vector>
+
+#include "ash/ash_export.h"
+#include "base/strings/string16.h"
+
+namespace aura {
+class Window;
+}  // namespace aura
+
+namespace content {
+class BrowserContext;
+}
+
+namespace gfx {
+class ImageSkia;
+}  // namespace gfx
+
+namespace ash {
+
+class SessionStateObserver;
+
+// The index for the multi-profile item to use. The list is always LRU sorted
+// So that the index #0 is the currently active user.
+typedef int MultiProfileIndex;
+
+// A list of user_id.
+typedef std::vector<std::string> UserIdList;
+
+// Delegate for checking and modifying the session state.
+// TODO(oshima): Replace MultiProfileIndex with BrowsreContext, bacause
+// GetUserXXX are useful for non multi profile scenario in ash_shell.
+class ASH_EXPORT SessionStateDelegate {
+ public:
+  // Defines the cycle direction for |CycleActiveUser|.
+  enum CycleUser {
+    CYCLE_TO_NEXT_USER = 0,  // Cycle to the next user.
+    CYCLE_TO_PREVIOUS_USER,  // Cycle to the previous user.
+  };
+
+  // Defines session state i.e. whether session is running or not and
+  // whether user session is blocked by things like multi-profile login.
+  enum SessionState {
+    // When primary user login UI is shown i.e. after boot or sign out,
+    // no active user session exists yet.
+    SESSION_STATE_LOGIN_PRIMARY = 0,
+
+    // Inside user session (including lock screen),
+    // no login UI (primary or multi-profiles) is shown.
+    SESSION_STATE_ACTIVE,
+
+    // When secondary user login UI is shown i.e. other users are
+    // already logged in and is currently adding another user to the session.
+    SESSION_STATE_LOGIN_SECONDARY,
+  };
+
+  virtual ~SessionStateDelegate() {};
+
+  // Returns the browser context for the user given by |index|.
+  virtual content::BrowserContext* GetBrowserContextByIndex(
+      MultiProfileIndex index) = 0;
+
+  // Returns the browser context associated with the window.
+  virtual content::BrowserContext* GetBrowserContextForWindow(
+      aura::Window* window) = 0;
+
+  // Returns the maximum possible number of logged in users.
+  virtual int GetMaximumNumberOfLoggedInUsers() const = 0;
+
+  // Returns the number of signed in users. If 0 is returned, there is either
+  // no session in progress or no active user.
+  virtual int NumberOfLoggedInUsers() const = 0;
+
+  // Returns |true| if the session has been fully started for the active user.
+  // When a user becomes active, the profile and browser UI are not immediately
+  // available. Only once this method starts returning |true| is the browser
+  // startup complete and both profile and UI are fully available.
+  virtual bool IsActiveUserSessionStarted() const = 0;
+
+  // Returns true if the screen can be locked.
+  virtual bool CanLockScreen() const = 0;
+
+  // Returns true if the screen is currently locked.
+  virtual bool IsScreenLocked() const = 0;
+
+  // Returns true if the screen should be locked when the system is about to
+  // suspend.
+  virtual bool ShouldLockScreenBeforeSuspending() const = 0;
+
+  // Locks the screen. The locking happens asynchronously.
+  virtual void LockScreen() = 0;
+
+  // Unlocks the screen.
+  virtual void UnlockScreen() = 0;
+
+  // Returns |true| if user session blocked by some overlying UI. It can be
+  // login screen, lock screen or screen for adding users into multi-profile
+  // session.
+  virtual bool IsUserSessionBlocked() const = 0;
+
+  // Returns current session state.
+  virtual SessionState GetSessionState() const = 0;
+
+  // Gets the displayed name for the user with the given |index|.
+  // Note that |index| can at maximum be |NumberOfLoggedInUsers() - 1|.
+  virtual const base::string16 GetUserDisplayName(
+      MultiProfileIndex index) const = 0;
+
+  // Gets the given name of the user with |index|. An empty string can be
+  // returned if the given name of the user is unknown.
+  // Note that |index| can at maximum be |NumberOfLoggedInUsers() - 1|.
+  virtual const base::string16 GetUserGivenName(
+      MultiProfileIndex index) const = 0;
+
+  // Gets the display email address for the user with the given |index|.
+  // The display email address might contains some periods in the email name
+  // as well as capitalized letters. For example: "Foo.Bar@mock.com".
+  // Note that |index| can at maximum be |NumberOfLoggedInUsers() - 1|.
+  virtual const std::string GetUserEmail(MultiProfileIndex index) const = 0;
+
+  // Gets the user id (sanitized email address) for the user with the given
+  // |index|. The function would return something like "foobar@mock.com".
+  // Note that |index| can at maximum be |NumberOfLoggedInUsers() - 1|.
+  virtual const std::string GetUserID(MultiProfileIndex index) const = 0;
+
+  // Gets the avatar image for the user associated with the |context|.
+  virtual const gfx::ImageSkia& GetUserImage(
+      content::BrowserContext* context) const = 0;
+
+  // Whether or not the window's title should show the avatar.
+  virtual bool ShouldShowAvatar(aura::Window* window) = 0;
+
+  // Switches to another active user with |user_id|
+  // (if that user has already signed in).
+  virtual void SwitchActiveUser(const std::string& user_id) = 0;
+
+  // Switches the active user to the next or previous user, with the same
+  // ordering as GetLoggedInUsers.
+  virtual void CycleActiveUser(CycleUser cycle_user) = 0;
+
+  // Adds or removes sessions state observer.
+  virtual void AddSessionStateObserver(SessionStateObserver* observer) = 0;
+  virtual void RemoveSessionStateObserver(SessionStateObserver* observer) = 0;
+};
+
+}  // namespace ash
+
+#endif  // ASH_SESSION_STATE_DELEGATE_H_