Upstream Chrome on iOS source code [9/11].

ios/chrome/browser/ui/tools_menu/reading_list_menu_view_item.mm

Index: ios/chrome/browser/ui/tools_menu/reading_list_menu_view_item.mm
diff --git a/ios/chrome/browser/ui/tools_menu/reading_list_menu_view_item.mm b/ios/chrome/browser/ui/tools_menu/reading_list_menu_view_item.mm
new file mode 100644
index 0000000000000000000000000000000000000000..faedbaf0686b3323ead8355483c3d7b9446bb52d
--- /dev/null
+++ b/ios/chrome/browser/ui/tools_menu/reading_list_menu_view_item.mm
@@ -0,0 +1,92 @@
+// 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/ui/tools_menu/reading_list_menu_view_item.h"
+
+#include "base/mac/foundation_util.h"
+#import "base/mac/scoped_nsobject.h"
+#import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
+#import "ios/chrome/browser/ui/reading_list/number_badge_view.h"
+#import "ios/third_party/material_components_ios/src/components/Palettes/src/MaterialPalettes.h"
+
+namespace {
+// ID for cell reuse
+static NSString* const kReadingListCellID = @"ReadingListCellID";
+const CGFloat kToolsMenuItemTrailingMargin = 25;
+}  // namespace
+
+@interface ReadingListMenuViewCell () {
+  base::scoped_nsobject<NumberBadgeView> _badge;
+}
+@end
+
+@implementation ReadingListMenuViewItem
+
++ (NSString*)cellID {
+  return kReadingListCellID;
+}
+
++ (Class)cellClass {
+  return [ReadingListMenuViewCell class];
+}
+
+@end
+
+@implementation ReadingListMenuViewCell
+
+- (void)initializeViews {
+  if (_badge && [self title]) {
+    return;
+  }
+
+  [super initializeViews];
+
+  _badge.reset([[NumberBadgeView alloc] initWithFrame:CGRectZero]);
+  [_badge setTranslatesAutoresizingMaskIntoConstraints:NO];
+  [self.contentView addSubview:_badge];
+
+  [self.contentView removeConstraints:self.contentView.constraints];
+
+  NSMutableArray<NSLayoutConstraint*>* constraintsToApply = [NSMutableArray
+      arrayWithArray:[NSLayoutConstraint
+                         constraintsWithVisualFormat:
+                             @"H:|-(margin)-[title]-[badge]-(endMargin)-|"
+                         options:NSLayoutFormatDirectionLeadingToTrailing
+                         metrics:@{
+                           @"margin" : @(self.horizontalMargin),
+                           @"endMargin" : @(kToolsMenuItemTrailingMargin)
+                         }
+                         views:@{
+                           @"title" : self.title,
+                           @"badge" : _badge
+                         }]];
+  [constraintsToApply
+      addObject:[self.title.centerYAnchor
+                    constraintEqualToAnchor:self.contentView.centerYAnchor]];
+  [constraintsToApply
+      addObject:[_badge.get().centerYAnchor
+                    constraintEqualToAnchor:self.contentView.centerYAnchor]];
+
+  [NSLayoutConstraint activateConstraints:constraintsToApply];
+}
+
+- (void)updateBadgeCount:(NSInteger)count animated:(BOOL)animated {
+  [_badge setNumber:count animated:animated];
+}
+
+- (void)updateSeenState:(BOOL)hasUnseenItems animated:(BOOL)animated {
+  if (hasUnseenItems) {
+    UIColor* highlightedColor = [[MDCPalette cr_bluePalette] tint500];
+
+    [_badge setBackgroundColor:highlightedColor animated:animated];
+    [self.title setTextColor:highlightedColor];
+  } else {
+    UIColor* regularColor = [[MDCPalette greyPalette] tint500];
+
+    [_badge setBackgroundColor:regularColor animated:animated];
+    [self.title setTextColor:[UIColor blackColor]];
+  }
+}
+
+@end