Upstream Chrome on iOS source code [2/11].

ios/chrome/browser/payments/payment_items_display_view_controller.mm

+// Copyright 2016 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.
+
+#import "ios/chrome/browser/payments/payment_items_display_view_controller.h"
+
+#import "base/ios/weak_nsobject.h"
+#include "base/mac/scoped_nsobject.h"
+#include "base/strings/sys_string_conversions.h"
+#include "components/autofill/core/browser/credit_card.h"
+#import "ios/chrome/browser/payments/cells/order_summary_line_item.h"
+#import "ios/chrome/browser/payments/cells/order_summary_total_item.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_detail_item.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_item.h"
+#import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
+#import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
+#import "ios/chrome/browser/ui/icons/chrome_icon.h"
+#include "ios/chrome/browser/ui/rtl_geometry.h"
+#include "ios/chrome/grit/ios_strings.h"
+#import "ios/third_party/material_components_ios/src/components/Buttons/src/MaterialButtons.h"
+#include "ui/base/l10n/l10n_util.h"
+
+NSString* const kPaymentItemsDisplayCollectionViewId =
+    @"kPaymentItemsDisplayCollectionViewId";
+
+namespace {
+
+const CGFloat kButtonEdgeInset = 9;
+const CGFloat kSeparatorEdgeInset = 14;
+
+typedef NS_ENUM(NSInteger, SectionIdentifier) {
+  SectionIdentifierPayment = kSectionIdentifierEnumZero,
+};
+
+typedef NS_ENUM(NSInteger, ItemType) {
+  ItemTypePaymentItem = kItemTypeEnumZero,  // This is a repeated item type.
+};
+
+}  // namespace
+
+@interface PaymentItemsDisplayViewController () {
+  base::WeakNSProtocol<id<PaymentItemsDisplayViewControllerDelegate>> _delegate;
+  base::scoped_nsobject<MDCFlatButton> _payButton;
+}
+
+// Called when the user presses the return button.
+- (void)onReturn;
+
+// Called when the user presses the pay button.
+- (void)onConfirm;
+
+@end
+
+@implementation PaymentItemsDisplayViewController
+
+@synthesize total = _total;
+@synthesize paymentItems = _paymentItems;
+
+- (instancetype)initWithPayButtonEnabled:(BOOL)payButtonEnabled {
+  if ((self = [super initWithStyle:CollectionViewControllerStyleAppBar])) {
+    [self setTitle:l10n_util::GetNSString(
+                       IDS_IOS_PAYMENT_REQUEST_PAYMENT_ITEMS_TITLE)];
+
+    // Set up left (return) button.
+    UIBarButtonItem* returnButton =
+        [ChromeIcon templateBarButtonItemWithImage:[ChromeIcon backIcon]
+                                            target:nil
+                                            action:@selector(onReturn)];
+    [self navigationItem].leftBarButtonItem = returnButton;
+
+    // Set up right (pay) button.
+    _payButton.reset([[MDCFlatButton alloc] init]);
+    [_payButton
+        setTitle:l10n_util::GetNSString(IDS_IOS_PAYMENT_REQUEST_PAY_BUTTON)
+        forState:UIControlStateNormal];
+    [_payButton setBackgroundColor:[[MDCPalette cr_bluePalette] tint500]
+                          forState:UIControlStateNormal];
+    [_payButton setInkColor:[UIColor colorWithWhite:1 alpha:0.2]];
+    [_payButton setBackgroundColor:[UIColor grayColor]
+                          forState:UIControlStateDisabled];
+    [_payButton addTarget:nil
+                   action:@selector(onConfirm)
+         forControlEvents:UIControlEventTouchUpInside];
+    [_payButton sizeToFit];
+    [_payButton setEnabled:payButtonEnabled];
+    [_payButton setAutoresizingMask:UIViewAutoresizingFlexibleTrailingMargin() |
+                                    UIViewAutoresizingFlexibleTopMargin |
+                                    UIViewAutoresizingFlexibleBottomMargin];
+
+    // The navigation bar will set the rightBarButtonItem's height to the full
+    // height of the bar. We don't want that for the button so we use a UIView
+    // here to contain the button instead and the button is vertically centered
+    // inside the full bar height.
+    UIView* buttonView =
+        [[[UIView alloc] initWithFrame:CGRectZero] autorelease];
+    [buttonView addSubview:_payButton];
+    // Navigation bar button items are aligned with the trailing edge of the
+    // screen. Make the enclosing view larger here. The pay button will be
+    // aligned with the leading edge of the enclosing view leaving an inset on
+    // the trailing edge.
+    CGRect buttonViewBounds = buttonView.bounds;
+    buttonViewBounds.size.width =
+        [_payButton frame].size.width + kButtonEdgeInset;
+    buttonView.bounds = buttonViewBounds;
+
+    UIBarButtonItem* payButtonItem =
+        [[[UIBarButtonItem alloc] initWithCustomView:buttonView] autorelease];
+    [self navigationItem].rightBarButtonItem = payButtonItem;
+  }
+  return self;
+}
+
+- (id<PaymentItemsDisplayViewControllerDelegate>)delegate {
+  return _delegate.get();
+}
+
+- (void)setDelegate:(id<PaymentItemsDisplayViewControllerDelegate>)delegate {
+  _delegate.reset(delegate);
+}
+
+- (void)onReturn {
+  [_payButton setEnabled:NO];
+  [_delegate paymentItemsDisplayViewControllerDidReturn:self];
+}
+
+- (void)onConfirm {
+  [_payButton setEnabled:NO];
+  [_delegate paymentItemsDisplayViewControllerDidConfirm:self];
+}
+
+#pragma mark - CollectionViewController methods
+
+- (void)loadModel {
+  [super loadModel];
+  CollectionViewModel* model = self.collectionViewModel;
+  [model addSectionWithIdentifier:SectionIdentifierPayment];
+
+  NSNumberFormatter* currencyFormatter =
+      [[[NSNumberFormatter alloc] init] autorelease];
+  [currencyFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
+
+  // Add the total entry.
+  OrderSummaryTotalItem* totalItem = [[[OrderSummaryTotalItem alloc]
+      initWithType:ItemTypePaymentItem] autorelease];
+  totalItem.text = base::SysUTF16ToNSString(_total.label);
+
+  NSString* currencyCode = base::SysUTF16ToNSString(_total.amount.currency);
+  NSDecimalNumber* value = [NSDecimalNumber
+      decimalNumberWithString:SysUTF16ToNSString(_total.amount.value)];
+  [currencyFormatter setCurrencyCode:currencyCode];
+  totalItem.detailText = [currencyFormatter stringFromNumber:value];
+
+  [model addItem:totalItem toSectionWithIdentifier:SectionIdentifierPayment];
+
+  // Add the line item entries.
+  for (size_t i = 0; i < _paymentItems.size(); ++i) {
+    web::PaymentItem paymentItem = _paymentItems[i];
+    OrderSummaryLineItem* paymentItemItem = [[[OrderSummaryLineItem alloc]
+        initWithType:ItemTypePaymentItem] autorelease];
+    paymentItemItem.text = base::SysUTF16ToNSString(paymentItem.label);
+
+    NSString* currencyCode =
+        base::SysUTF16ToNSString(paymentItem.amount.currency);
+    NSDecimalNumber* value = [NSDecimalNumber
+        decimalNumberWithString:SysUTF16ToNSString(paymentItem.amount.value)];
+    [currencyFormatter setCurrencyCode:currencyCode];
+    paymentItemItem.detailText = [currencyFormatter stringFromNumber:value];
+
+    [model addItem:paymentItemItem
+        toSectionWithIdentifier:SectionIdentifierPayment];
+  }
+}
+
+- (void)viewDidLoad {
+  [super viewDidLoad];
+  self.collectionView.accessibilityIdentifier =
+      kPaymentItemsDisplayCollectionViewId;
+
+  // Customize collection view settings.
+  self.styler.cellStyle = MDCCollectionViewCellStyleCard;
+  self.styler.separatorInset =
+      UIEdgeInsetsMake(0, kSeparatorEdgeInset, 0, kSeparatorEdgeInset);
+}
+
+#pragma mark MDCCollectionViewStylingDelegate
+
+// There are no effects from touching the payment items so there should not be
+// an ink ripple.
+- (BOOL)collectionView:(UICollectionView*)collectionView
+    hidesInkViewAtIndexPath:(NSIndexPath*)indexPath {
+  return YES;
+}
+
+@end