[Payment Request] Selector view controller

ios/chrome/browser/payments/payment_request_selector_view_controller.h

+// Copyright 2017 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 IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_SELECTOR_VIEW_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_SELECTOR_VIEW_CONTROLLER_H_
+
+#import <UIKit/UIKit.h>
+
+#import "ios/chrome/browser/ui/collection_view/collection_view_controller.h"
+
+@class PaymentRequestSelectorViewController;
+@protocol PaymentRequestSelectorViewControllerDataSource;
+
+// Delegate protocol for PaymentRequestSelectorViewController.
+@protocol PaymentRequestSelectorViewControllerDelegate<NSObject>
+
+// Notifies the delegate that the user has selected an item at the given index.
+- (void)paymentRequestSelectorViewController:
+            (PaymentRequestSelectorViewController*)controller
+                        didSelectItemAtIndex:(NSUInteger)index;
+
+// Notifies the delegate that the user has chosen to add an item.
+- (void)paymentRequestSelectorViewControllerDidSelectAddItem:
+    (PaymentRequestSelectorViewController*)controller;
+
+// Notifies the delegate that the user has chosen to return to the previous
+// screen without making a selection.
+- (void)paymentRequestSelectorViewControllerDidFinish:
+    (PaymentRequestSelectorViewController*)controller;
+
+@end
+
+// View controller responsible for presenting a list of items provided by the
+// supplied data source for selection by the user and communicating the choice
+// to the supplied delegate. It displays an optional header item provided by the
+// data source above the list of selectable items. The list is followed by an
+// optional button to add an item.
+@interface PaymentRequestSelectorViewController : CollectionViewController
+
+// The delegate to be notified when the user selects an item, returns without
+// selection, or decides to add an item.
+@property(nonatomic, weak) id<PaymentRequestSelectorViewControllerDelegate>
+    delegate;
+
+// The data source for this view controller.
+@property(nonatomic, weak) id<PaymentRequestSelectorViewControllerDataSource>
+    dataSource;
+
+// Convenience initializer. Initializes this object with the
+// CollectionViewControllerStyleAppBar style and sets up the leading (back)
+// button.
+- (instancetype)init;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_SELECTOR_VIEW_CONTROLLER_H_