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 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 CHROME_BROWSER_UI_AUTOFILL_ACCOUNT_CHOOSER_MODEL_H_
+#define CHROME_BROWSER_UI_AUTOFILL_ACCOUNT_CHOOSER_MODEL_H_
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.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;
+
+  // Called when the account chooser UI needs to be updated.
+  virtual void UpdateAccountChooserView() = 0;
+};
+
+// A menu model for the account chooser. This allows users to switch between
+// Online Wallet accounts and local Autofill data.
+// Terminology:
+// - "Active Wallet account": the account used for communications with the
+// Online Wallet service.  There may be multiple signed-in accounts, but at any
+// point of time at most one of is active.
+// - "Additional accounts": the accounts the user could switch to in addition
+// to the currently active Wallet account (if any).  On Android, selection of
+// any of these accounts causes the automatic sign-in into the selected account.
+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;
+
+  // Sets the selection to the currently active Online Wallet account.
+  // Should be called if the user attempts to sign into the Online Wallet
+  // (e.g. when the user clicks the "Sign-in" link).
+  void ForceSelectWalletAccount();

[Evan Stade, 2013/04/11 19:27:45]

why ForceSelect...? Why not just Select...?

[aruslan, 2013/04/12 00:46:02]

Done.

+
+  // Returns true if there are any accounts for the user to choose from.
+  bool HasAccountsToChoose() const;
+
+  // Establishes the set of accounts the user could select in addition
+  // to the currently active account (if any).
+  void SetAdditionalAccounts(const std::vector<string16>& accounts);

[Evan Stade, 2013/04/11 19:27:45]

it seems this is only exercised by tests. Could you remove code that is only
exercised by tests, and only add it (plus the tests) when you have code that
uses it? Otherwise it is hard to review the interface.

[aruslan, 2013/04/12 00:46:02]

Done.

+
+  // Returns the set of all accounts in the account chooser.
+  // This is the union of the currently active account (if any) and
+  // additional accounts (if any).
+  std::vector<string16> GetAllAccounts() const;
+
+  // Sets the name of the account used to communicate with the Online Wallet.
+  void SetActiveWalletAccountName(const string16& account);

[Evan Stade, 2013/04/11 19:27:45]

So is it the "active wallet account name" or the "current username"?

[aruslan, 2013/04/12 00:46:02]

Done.

+
+  // Clears the name of the account used to communicate with the Online Wallet.
+  // Any Wallet error automatically clears the currently active account name.
+  void ClearActiveWalletAccountName();
+
+  // Returns the name of the currently active account, or an empty string.
+  string16 GetActiveWalletAccountName() const;

[Evan Stade, 2013/04/11 19:27:45]

should return const string16&. Should be called current_username() and defined
inline.

[aruslan, 2013/04/12 00:46:02]

Done.

+
+  // Disables all Wallet accounts and switches to the autofill data.
+  // Should be called when the Wallet server returns an error.
+  void SetHadWalletError();
+
+  // Switches the dialog to the local autofill data.
+  // Should be called when the Online Wallet sign-in attempt has failed.
+  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 current selection matches the currently active
+  // Wallet account.
+  bool IsActiveWalletAccountSelected() const;
+
+  // Returns the command id of the current selection.
+  int checked_item() const { return checked_item_; }
+
+  // Command IDs of the items in this menu:
+  // kActiveWalletItemId is the currently active account.
+  // kAutofillItemId is "Pay without the Wallet" (local autofill data).
+  // In the future, the kAddNewAccountItemId will be added.
+  // Any other accounts go starting from kFirstAccountItemId.
+  static const int kActiveWalletItemId;  // The active Wallet account.

[Evan Stade, 2013/04/11 19:27:45]

you seem to double-document each of these

[aruslan, 2013/04/12 00:46:02]

Done.

+  static const int kAutofillItemId;  // Local autofill data.
+  static const int kFirstAdditionalItemId;  // First id for additional accounts.

[Evan Stade, 2013/04/11 19:27:45]

you shouldn't need to expose these publicly.

[aruslan, 2013/04/12 00:46:02]

Done.

+
+ private:
+  // Reconstructs the set of menu items.
+  void ReconstructMenuItems();
+
+  AccountChooserModelDelegate* account_delegate_;

[Evan Stade, 2013/04/11 19:27:45]

nit: just |delegate_|

[aruslan, 2013/04/12 00:46:02]

Done.

+
+  // The command id of the currently selected item.
+  int checked_item_;
+
+  // Whether there has been a Wallet error while the owning dialog has been
+  // open.
+  bool had_wallet_error_;
+
+  // The name (email) of the account currently used in communications with the
+  // Online Wallet service. Set whenever the sign-in helper fetches the user
+  // info.

[Evan Stade, 2013/04/11 19:27:45]

nit: remove final sentence

[aruslan, 2013/04/12 00:46:02]

Done.

+  string16 current_username_;
+
+  // The set of accounts the user could choose from in addition to the currently
+  // active Wallet account (if any).
+  std::vector<string16> additional_accounts_;
+
+  DISALLOW_COPY_AND_ASSIGN(AccountChooserModel);
+};
+
+}  // autofill
+
+#endif  // CHROME_BROWSER_UI_AUTOFILL_ACCOUNT_CHOOSER_MODEL_H_