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 "components/autofill/browser/autofill_manager_delegate.h"
+#include "ui/base/models/simple_menu_model.h"
+
+class AutofillMetrics;
+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.
+class AccountChooserModel : public ui::SimpleMenuModel,
+                            public ui::SimpleMenuModel::Delegate {
+ public:
+  AccountChooserModel(AccountChooserModelDelegate* delegate,
+                      PrefService* prefs,
+                      const AutofillMetrics& metric_logger,
+                      DialogType dialog_type);
+  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 SelectActiveWalletAccount();
+
+  // Sets the selection to the local Autofill data.
+  void SelectUseAutofill();
+
+  // Returns true if there are any accounts for the user to choose from.
+  bool HasAccountsToChoose() const;
+
+  // Sets the name of the account used to communicate with the Online Wallet.
+  void SetActiveWalletAccountName(const string16& account);
+
+  // 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.
+  const string16& active_wallet_account_name() const {
+    return active_wallet_account_name_;
+  }
+
+  // Disables all Wallet accounts and switches to the local 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_; }
+
+ protected:
+  // Command IDs of the items in this menu; protected for the tests.
+  // kActiveWalletItemId is the currently active account.
+  // kAutofillItemId is "Pay without the Wallet" (local autofill data).
+  // In the future, kFirstAdditionalItemId will be added as the first id
+  // for additional accounts.
+  static const int kActiveWalletItemId;
+  static const int kAutofillItemId;
+
+ private:
+  // Reconstructs the set of menu items.
+  void ReconstructMenuItems();
+
+  AccountChooserModelDelegate* delegate_;
+
+  // 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_;
+
+  // For logging UMA metrics.
+  const AutofillMetrics& metric_logger_;
+  const DialogType dialog_type_;
+
+  // The name (email) of the account currently used in communications with the
+  // Online Wallet service.
+  string16 active_wallet_account_name_;
+
+  DISALLOW_COPY_AND_ASSIGN(AccountChooserModel);
+};
+
+}  // namespace autofill
+
+#endif  // CHROME_BROWSER_UI_AUTOFILL_ACCOUNT_CHOOSER_MODEL_H_