[Payment Request] Generic edit form

ios/chrome/browser/payments/payment_request_edit_view_controller.h

Index: ios/chrome/browser/payments/payment_request_edit_view_controller.h
diff --git a/ios/chrome/browser/payments/payment_request_edit_view_controller.h b/ios/chrome/browser/payments/payment_request_edit_view_controller.h
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+++ b/ios/chrome/browser/payments/payment_request_edit_view_controller.h
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+// 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_EDIT_VIEW_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_EDIT_VIEW_CONTROLLER_H_
+
+#import <UIKit/UIKit.h>
+#include <vector>
+
+#import "ios/chrome/browser/ui/collection_view/collection_view_controller.h"
+
+@class EditorField;
+@class PaymentRequestEditViewController;
+
+// Delegate protocol for PaymentRequestEditViewController.
+@protocol PaymentRequestEditViewControllerDelegate<NSObject>
+
+// Notifies the delegate that the user has finished editing the fields supplied
+// to the initializer. The value property of each field reflects the submitted
+// value.
+- (void)paymentRequestEditViewController:
+            (PaymentRequestEditViewController*)controller
+                  didFinishEditingFields:(NSArray<EditorField*>*)fields;
+
+// Notifies the delegate that the user has chosen to return to the previous
+// screen.
+- (void)paymentRequestEditViewControllerDidReturn:
+    (PaymentRequestEditViewController*)controller;
+
+@end
+
+// Validator protocol for PaymentRequestEditViewController.
+@protocol PaymentRequestEditViewControllerValidator<NSObject>
+
+// Returns the validation error string for |value|. |autofillType| corresponds
+// to autofill::ServerFieldType. |required| indicates whether this is a required
+// field. If there are no validation errors, an empty string is returned.
+- (NSString*)paymentRequestEditViewController:
+                 (PaymentRequestEditViewController*)controller
+                                validateValue:(NSString*)value
+                                 autofillType:(NSInteger)autofillType
+                                     required:(BOOL)required;
+
+@end
+
+// The collection view controller for a generic Payment Request edit screen. It
+// features sections for every EditorField supplied to the initializer. Each
+// section has a text field as well as an error message item which is visible
+// when the value of its respective text field is invalid.
+@interface PaymentRequestEditViewController : CollectionViewController
+
+// The delegate to be notified when the user returns or finishes editing the
+// fields.
+@property(nonatomic, weak) id<PaymentRequestEditViewControllerDelegate>
+    editorDelegate;
+
+// The delegate to be called for validating the fields. By default, the
+// controller is the validator.
+@property(nonatomic, weak) id<PaymentRequestEditViewControllerValidator>
+    validatorDelegate;
+
+// Initializes this instance with a list of field definitions for the editor.
+- (instancetype)initWithEditorFields:(NSArray<EditorField*>*)fields
+    NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+- (instancetype)initWithStyle:(CollectionViewControllerStyle)style
+    NS_UNAVAILABLE;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_EDIT_VIEW_CONTROLLER_H_