[cros] update screen re-factoring pt.1

chrome/browser/chromeos/login/update_screen.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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 CHROME_BROWSER_CHROMEOS_LOGIN_UPDATE_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_UPDATE_SCREEN_H_
 #pragma once
 
+#include <set>
+
+#include "base/gtest_prod_util.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/timer.h"
 #include "chrome/browser/chromeos/cros/update_library.h"
-#include "chrome/browser/chromeos/login/update_view.h"
-#include "chrome/browser/chromeos/login/view_screen.h"
+#include "chrome/browser/chromeos/login/wizard_screen.h"
 
 namespace chromeos {
 
-class UpdateController {
- public:
-  // Starts update.
-  virtual void StartUpdate() = 0;
-  // Cancels pending update without error.
-  virtual void CancelUpdate() = 0;
-};
+// Forward declaration.
+class UpdateScreenActor;
 
-class UpdateScreen: public DefaultViewScreen<chromeos::UpdateView>,
-                    public UpdateLibrary::Observer,
-                    public UpdateController {
+// Controller for the update screen. It does not depend on the specific
+// implementation of the screen showing (Views of WebUI based), the dependency
+// is moved to the UpdateScreenActor instead.
+class UpdateScreen: public UpdateLibrary::Observer,
+                    public WizardScreen {
  public:
   explicit UpdateScreen(WizardScreenDelegate* delegate);
   virtual ~UpdateScreen();
 
-  // UpdateLibrary::Observer implementation:
-  virtual void UpdateStatusChanged(UpdateLibrary* library);
+  // Overridden from WizardScreen.
+  virtual void Show();
+  virtual void Hide();
+  virtual gfx::Size GetScreenSize() const;
 
-  // Overridden from UpdateController:
+  // Checks for updates and performs an update if needed. Made virtual to
+  // simplify mocking.
   virtual void StartUpdate();
+
+  // Force cancel update. Made virtual to simplify mocking.
   virtual void CancelUpdate();
 
-  // Overridden from ViewScreen.
-  virtual void Show();
+  // Reboot check delay get/set, in seconds.
+  int reboot_check_delay() const { return reboot_check_delay_; }
+  void SetRebootCheckDelay(int seconds);
+
+  // Returns true if this instance is still active (i.e. has not been deleted).
+  static bool HasInstance(UpdateScreen* inst);
 
   enum ExitReason {
      REASON_UPDATE_CANCELED,
      REASON_UPDATE_INIT_FAILED,
      REASON_UPDATE_NON_CRITICAL,
      REASON_UPDATE_ENDED
   };
-
   // Reports update results to the ScreenObserver.
   virtual void ExitUpdate(ExitReason reason);
 
-  // Reboot check delay get/set, in seconds.
-  int reboot_check_delay() const { return reboot_check_delay_; }
-  void SetRebootCheckDelay(int seconds);
+  // UpdateLibrary::Observer implementation:
+  virtual void UpdateStatusChanged(UpdateLibrary* library);
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(UpdateScreenTest, TestBasic);
+  FRIEND_TEST_ALL_PREFIXES(UpdateScreenTest, TestUpdateAvailable);
 
   // Returns true if there is critical system update that requires installation
   // and immediate reboot.
   bool HasCriticalUpdate();
 
-  // Set flag to treat all updates as critical (for test purpose mainly).
-  // Default value is false.
-  void SetAllUpdatesCritical(bool is_critical);
-
-  // Returns true if this instance is still active (i.e. has not been deleted).
-  static bool HasInstance(UpdateScreen* inst);
-
- private:
   // Timer notification handlers.
   void OnWaitForRebootTimeElapsed();
 
   // Checks that screen is shown, shows if not.
   void MakeSureScreenIsShown();
 
   // Timer for the interval to wait for the reboot.
   // If reboot didn't happen - ask user to reboot manually.
   base::OneShotTimer<UpdateScreen> reboot_timer_;
 
   // Returns a static InstanceSet.
   typedef std::set<UpdateScreen*> InstanceSet;
   static InstanceSet& GetInstanceSet();
 
-  // True if in the process of checking for update.
-  bool checking_for_update_;
-
   // Time in seconds after which we decide that the device has not rebooted
   // automatically. If reboot didn't happen during this interval, ask user to
   // reboot device manually.
   int reboot_check_delay_;
 
+  // True if in the process of checking for update.
+  bool is_checking_for_update_;
   // Flag that is used to detect when update download has just started.
   bool is_downloading_update_;
+  // If true, update deadlines are ignored.
+  // Note, this is true by default. See "http://crosbug.com/10068".
+  bool is_ignore_update_deadlines_;
+  // Whether the update screen is shown.
+  bool is_shown_;
 
-  // Is all updates critical? If true, update deadlines are ignored.
-  bool is_all_updates_critical_;
+  // Keeps actor which is delegated with all showing operations.
+  scoped_ptr<UpdateScreenActor> actor_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_UPDATE_SCREEN_H_