1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_SIGNIN_SIGNIN_NAMES_IO_THREAD_H_ 6 #define CHROME_BROWSER_SIGNIN_SIGNIN_NAMES_IO_THREAD_H_ 7 8 #include <set> 9 10 #include "base/basictypes.h" 11 #include "base/memory/ref_counted.h" 12 #include "base/memory/scoped_ptr.h" 13 #include "base/strings/string16.h" 14 #include "chrome/browser/signin/signin_manager_factory.h" 15 #include "components/signin/core/browser/signin_manager_base.h" 16 17 // This class provides access to a list of email addresses for all profiles 18 // connected to a Google account, from the IO thread. The main purpose of 19 // this is to be a member of the ProfileIOData structure to allow access to 20 // the list of email addresses, and is used by the one-click sign in code to 21 // know which Google accounts are already in use. 22 // 23 // Instance of this class are created and initialized on the UI 24 // thread as part of the creation of ProfileIOData, and destroyed along with 25 // ProfileIOData. 26 class SigninNamesOnIOThread : public SigninManagerBase::Observer, 27 public SigninManagerFactory::Observer { 28 public: 29 typedef std::set<base::string16> EmailSet; 30 31 // Objects should only be created on UI thread. 32 SigninNamesOnIOThread(); 33 virtual ~SigninNamesOnIOThread(); 34 35 // Gets the set of email addresses of connected profiles. This method should 36 // only be called on the IO thread. 37 const EmailSet& GetEmails() const; 38 39 // Releases all resource held by object. Once released, GetEmails() no 40 // longer works. 41 void ReleaseResourcesOnUIThread(); 42 43 private: 44 // SigninManagerBase::Observer: 45 virtual void GoogleSigninSucceeded(const std::string& account_id, 46 const std::string& username, 47 const std::string& password) OVERRIDE; 48 virtual void GoogleSignedOut(const std::string& account_id, 49 const std::string& username) OVERRIDE; 50 51 // SigninManagerFactory::Observer: 52 virtual void SigninManagerCreated(SigninManagerBase* manager) OVERRIDE; 53 virtual void SigninManagerShutdown(SigninManagerBase* manager) OVERRIDE; 54 55 // Checks whether the current thread is the IO thread. 56 void CheckOnIOThread() const; 57 58 // Checks whether the current thread is the UI thread. 59 void CheckOnUIThread() const; 60 61 // Posts a task to the I/O thread to add or remove the email address from 62 // the set. 63 void PostTaskToIOThread(bool add, const base::string16& email); 64 65 // Updates the email set on the I/O thread. Protected for testing. 66 void UpdateOnIOThread(bool add, const base::string16& email); 67 68 EmailSet emails_; 69 70 // The set of SigninManagerBase instances that this instance is currently 71 // observing. Can only be accessed on the UI thread. 72 std::set<SigninManagerBase*> observed_managers_; 73 bool resources_released_; 74 75 DISALLOW_COPY_AND_ASSIGN(SigninNamesOnIOThread); 76 }; 77 78 #endif // CHROME_BROWSER_SIGNIN_SIGNIN_NAMES_IO_THREAD_H_ 79