Upstream Chrome on iOS source code [7/11].

ios/chrome/browser/ui/settings/cells/passphrase_error_item.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/ui/settings/cells/passphrase_error_item.h"
+
+#import <UIKit/UIKit.h>
+
+#import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
+#import "ios/third_party/material_components_ios/src/components/Palettes/src/MaterialPalettes.h"
+#import "ios/third_party/material_roboto_font_loader_ios/src/src/MaterialRobotoFontLoader.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+namespace {
+// Padding used on the leading and trailing edges of the cell.
+const CGFloat kHorizontalPadding = 16;
+}  // namespace
+
+@implementation PassphraseErrorItem
+
+@synthesize text = _text;
+
+- (instancetype)initWithType:(NSInteger)type {
+  self = [super initWithType:type];
+  if (self) {
+    self.cellClass = [PassphraseErrorCell class];
+  }
+  return self;
+}
+
+- (void)configureCell:(PassphraseErrorCell*)cell {
+  [super configureCell:cell];
+  cell.textLabel.text = self.text;
+}
+
+@end
+
+@interface PassphraseErrorCell ()
+@property(nonatomic, readonly, strong) UIImageView* errorImageView;
+@end
+
+@implementation PassphraseErrorCell
+
+@synthesize textLabel = _textLabel;
+@synthesize errorImageView = _errorImageView;
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  self = [super initWithFrame:frame];
+  if (self) {
+    UIView* contentView = self.contentView;
+
+    _textLabel = [[UILabel alloc] init];
+    _textLabel.translatesAutoresizingMaskIntoConstraints = NO;
+    _textLabel.font =
+        [[MDFRobotoFontLoader sharedInstance] mediumFontOfSize:14];
+    _textLabel.textColor = [[MDCPalette cr_redPalette] tint500];
+    [contentView addSubview:_textLabel];
+
+    _errorImageView = [[UIImageView alloc] init];
+    _errorImageView.translatesAutoresizingMaskIntoConstraints = NO;
+    _errorImageView.image = [UIImage imageNamed:@"encryption_error"];
+    [contentView addSubview:_errorImageView];
+
+    // Set up the constraints.
+    [NSLayoutConstraint activateConstraints:@[
+      [_errorImageView.leadingAnchor
+          constraintEqualToAnchor:contentView.leadingAnchor
+                         constant:kHorizontalPadding],
+      [_textLabel.leadingAnchor
+          constraintEqualToAnchor:_errorImageView.trailingAnchor
+                         constant:kHorizontalPadding],
+      [_textLabel.trailingAnchor
+          constraintEqualToAnchor:contentView.trailingAnchor
+                         constant:-kHorizontalPadding],
+      [_errorImageView.centerYAnchor
+          constraintEqualToAnchor:contentView.centerYAnchor],
+      [_textLabel.centerYAnchor
+          constraintEqualToAnchor:contentView.centerYAnchor],
+    ]];
+
+    [_errorImageView
+        setContentHuggingPriority:UILayoutPriorityRequired
+                          forAxis:UILayoutConstraintAxisHorizontal];
+  }
+  return self;
+}
+
+- (void)prepareForReuse {
+  [super prepareForReuse];
+  self.textLabel.text = nil;
+}
+
+@end