[CRD iOS] Add the host setup instruction page

remoting/ios/app/host_setup_view_cell.mm

+// 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.
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+#import "remoting/ios/app/host_setup_view_cell.h"
+
+#import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
+#import "remoting/ios/app/remoting_theme.h"
+
+static const CGFloat kNumberIconPadding = 16.f;
+static const CGFloat kNumberIconSize = 45.f;
+static const CGFloat kCellPadding = 22.f;
+
+@interface HostSetupViewCell () {
+  UIView* _numberContainerView;
+  UILabel* _numberLabel;
+  UILabel* _contentLabel;
+}
+@end
+
+@implementation HostSetupViewCell
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  if (self = [super initWithFrame:frame]) {
+    [self commonInit];
+  }
+  return self;
+}
+
+- (void)commonInit {
+  self.backgroundColor = RemotingTheme.setupListBackgroundColor;
+
+  _numberContainerView = [[UIView alloc] init];
+  _numberLabel = [[UILabel alloc] init];
+  _contentLabel = [[UILabel alloc] init];
+
+  _numberContainerView.translatesAutoresizingMaskIntoConstraints = NO;
+  _numberLabel.translatesAutoresizingMaskIntoConstraints = NO;
+  _contentLabel.translatesAutoresizingMaskIntoConstraints = NO;
+
+  _contentLabel.lineBreakMode = NSLineBreakByWordWrapping;
+  _contentLabel.numberOfLines = 0;
+
+  _numberContainerView.backgroundColor = RemotingTheme.onlineHostColor;
+  _numberLabel.textColor = RemotingTheme.setupListNumberColor;
+  _contentLabel.textColor = RemotingTheme.setupListTextColor;
+  _numberLabel.font = MDCTypography.titleFont;
+  _contentLabel.font = MDCTypography.subheadFont;
+  _numberContainerView.layer.cornerRadius = kNumberIconSize / 2.f;
+
+  [self.contentView addSubview:_numberContainerView];
+  [self.contentView addSubview:_contentLabel];
+  [_numberContainerView addSubview:_numberLabel];
+
+  NSArray* constraints = @[
+    [_numberContainerView.leadingAnchor
+        constraintEqualToAnchor:self.contentView.leadingAnchor
+                       constant:kCellPadding],
+    [_numberContainerView.centerYAnchor
+        constraintEqualToAnchor:self.contentView.centerYAnchor],
+    [_numberContainerView.widthAnchor
+        constraintEqualToConstant:kNumberIconSize],
+    [_numberContainerView.heightAnchor
+        constraintEqualToConstant:kNumberIconSize],
+
+    [_numberLabel.centerXAnchor
+        constraintEqualToAnchor:_numberContainerView.centerXAnchor],
+    [_numberLabel.centerYAnchor
+        constraintEqualToAnchor:_numberContainerView.centerYAnchor],
+
+    [_contentLabel.leadingAnchor
+        constraintEqualToAnchor:_numberContainerView.trailingAnchor
+                       constant:kNumberIconPadding],
+    [_contentLabel.trailingAnchor
+        constraintEqualToAnchor:self.contentView.trailingAnchor
+                       constant:-kCellPadding],
+    [_contentLabel.centerYAnchor
+        constraintEqualToAnchor:self.contentView.centerYAnchor],
+  ];
+  [NSLayoutConstraint activateConstraints:constraints];
+}
+
+- (void)setContentText:(NSString*)text number:(NSInteger)number {
+  _contentLabel.text = text;
+  _numberLabel.text = [@(number) stringValue];
+}
+
+@end