Multi-account AccountChooser for interactive autocomplete.

chrome/browser/ui/autofill/account_chooser_model.h

Index: chrome/browser/ui/autofill/account_chooser_model.h
diff --git a/chrome/browser/ui/autofill/account_chooser_model.h b/chrome/browser/ui/autofill/account_chooser_model.h
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+// Copyright (c) 2012 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_UI_AUTOFILL_ACCOUNT_CHOOSER_MODEL_H_
+#define CHROME_BROWSER_UI_AUTOFILL_ACCOUNT_CHOOSER_MODEL_H_
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/prefs/pref_change_registrar.h"
+#include "base/string16.h"
+#include "ui/base/models/simple_menu_model.h"
+
+class PrefService;
+
+namespace autofill {
+
+// A delegate interface to allow the AccountChooserModel to inform its owner
+// of changes.
+class AccountChooserModelDelegate {
+ public:
+  virtual ~AccountChooserModelDelegate();
+
+  // Called when the active account has changed.
+  virtual void AccountChoiceChanged() = 0;
+};
+
+// A menu model for the account chooser. This allows users to switch between
+// using Wallet and local Autofill.
+class AccountChooserModel : public ui::SimpleMenuModel,
+                            public ui::SimpleMenuModel::Delegate {
+ public:
+  AccountChooserModel(AccountChooserModelDelegate* delegate,
+                      PrefService* prefs);
+  virtual ~AccountChooserModel();
+
+  // ui::SimpleMenuModel::Delegate implementation.
+  virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
+  virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
+  virtual bool GetAcceleratorForCommandId(
+      int command_id,
+      ui::Accelerator* accelerator) OVERRIDE;
+  virtual void ExecuteCommand(int command_id, int event_flags) OVERRIDE;
+
+  // Should be called if the user attempts to sign into the Online Wallet
+  // (e.g. when the user clicks the "Sign-in" link).
+  // This function calls AccountChoiceChanged on the delegate.

[Evan Stade, 2013/04/01 23:54:34]

nit: don't think this last line is necessary. It's an implementation detail and
likely to become stale.

[aruslan, 2013/04/10 17:40:31]

Done.

+  void ForceSelectWalletAccount();
+
+  // Returns true if there are any available accounts or if the currently
+  // signed-in account is known.

[Evan Stade, 2013/04/01 23:54:34]

I don't know what you mean by "known" or what "available" means really. What
does it mean for an account to be unknown? unavailable? Could you be more
explicit?

[aruslan, 2013/04/10 17:40:31]

Done.

+  bool HasAccountsToChoose() const;
+
+  // Should be called if the set of available accounts is changed.
+  // The set doesn't have to include the currently signed-in account.

[Evan Stade, 2013/04/01 23:54:34]

so you can have an account that's signed in but unavailable? this is confusing.

[aruslan, 2013/04/10 17:40:31]

Done.

+  // The menu model will be reconstructed due to this call.
+  // It is the responsibility of the caller to update the view accordingly.

[Evan Stade, 2013/04/01 23:54:34]

why does this one force the caller to know that the account choice will have
changed instead of just calling that function (or a different/new function on
AccountChooserModelDelegate)

[aruslan, 2013/04/10 17:40:31]

Done.

+  void SetAvailableAccounts(const std::vector<std::string>& accounts);
+
+  // Should be called if the signed-in account in the content area is known.

[Evan Stade, 2013/04/01 23:54:34]

I don't know what "content area" means here. Are you talking about the tab
contents? I'd call that the cookie jar, except that I don't think you should be
documenting when something should be called, rather what it does. This applies
to many of the comments here.

[aruslan, 2013/04/10 17:40:31]

Done.

+  // The menu model will be reconstructed due to this call.
+  // It is the responsibility of the caller to update the view accordingly.

[Evan Stade, 2013/04/01 23:54:34]

ditto

[aruslan, 2013/04/10 17:40:31]

Done.

+  void SetCurrentlySignedInAccount(const std::string& account);
+
+  // Should be called if the sign-in status of the content area is unknown.
+  // Any Wallet error automatically resets the currently signed-in account.

[Evan Stade, 2013/04/01 23:54:34]

resets it to what?

[aruslan, 2013/04/10 17:40:31]

Done.

+  // The menu model will be reconstructed due to this call.
+  // It is the responsibility of the caller to update the view accordingly.

[Evan Stade, 2013/04/01 23:54:34]

ditto

[aruslan, 2013/04/10 17:40:31]

Done.

+  void ResetCurrentlySignedInAccount();
+
+  // Returns the last known signed-in account, or an empty string.
+  // Returned account may be different from the currently selected account
+  // if the currently selected account is the autofill data.
+  std::string GetCurrentlySignedInAccount() const;
+
+  // Should be called when the Wallet server returns an error.
+  // This disables all Wallet accounts and switches to the autofill data.
+  // The AccountChoiceChanged() will be called on the delegate.

[Evan Stade, 2013/04/01 23:54:34]

ditto

[aruslan, 2013/04/10 17:40:31]

Done.

[aruslan, 2013/04/10 17:40:31]

Done.

+  void SetHadWalletError();
+
+  // Should be called when the Online Wallet sign-in attempt has failed.
+  // This swithes the dialog to the autofill data.
+  // The AccountChoiceChanged() will be called on the delegate.
+  void SetHadWalletSigninError();
+
+  bool had_wallet_error() const { return had_wallet_error_; }
+
+  // Returns true if the selected account is an Online Wallet account.
+  bool WalletIsSelected() const;
+
+  // Returns true if the currently selected account matches the currently
+  // signed-in account.
+  bool IsCurrentlySignedInAccountSelected() const;
+
+  // Returns the command id of the currently selected account.
+  int checked_item() const { return checked_item_; }
+
+ private:
+  void PrefChanged(const std::string& pref);
+
+  // Sets |checked_item_| from the relevant pref.
+  void UpdateCheckmarkFromPref();
+
+  // Reconstructs the set of menu items.
+  void ReconstructMenuItems();
+
+  // Command IDs of the items in this menu:
+  // kSignedInWalletItemId is the currently signed-in account, or an account
+  // the user is attempting to sign into.
+  // kAutofillItemId is "Pay without the Wallet".
+  // In the future, the kAddNewAccountItemId will be added.
+  // Any other accounts go starting from kFirstAccountItemId.
+  static const int kSignedInWalletItemId;  // The signed-in account.
+  static const int kAutofillItemId;  // Local data.
+  static const int kFirstAccountItemId;  // First command id for other accounts.
+
+  AccountChooserModelDelegate* account_delegate_;
+
+  PrefService* prefs_;
+
+  // The command id of the currently active item.
+  int checked_item_;
+
+  // Whether there has been a Wallet error while the owning dialog has been
+  // open.
+  bool had_wallet_error_;
+
+  PrefChangeRegistrar pref_change_registrar_;
+
+  // The user account name (email) that is currently signed into the content.
+  // May be different from the currently selected account (e.g. autofill data).

[Evan Stade, 2013/04/01 23:54:34]

refering to autofill data as an account is a source of confusion for me.

[aruslan, 2013/04/10 17:40:31]

Done.

+  // Set whenever the sign-in helper fetches the user info.
+  std::string current_username_;
+
+  // The set of accounts the user could choose from (excluding autofill data).
+  // Doesn't have to include the account currently signed into the content.
+  std::vector<std::string> available_accounts_;
+
+  DISALLOW_COPY_AND_ASSIGN(AccountChooserModel);
+};
+
+}  // autofill
+
+#endif  // CHROME_BROWSER_UI_AUTOFILL_ACCOUNT_CHOOSER_MODEL_H_