Updating Pin Entry View and creating Connection Status View.

remoting/client/ios/app/client_connection_view_controller.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/client/ios/app/client_connection_view_controller.h"
+
+#import "ios/third_party/material_components_ios/src/components/ActivityIndicator/src/MDCActivityIndicator.h"
+#import "ios/third_party/material_components_ios/src/components/Buttons/src/MaterialButtons.h"
+#import "ios/third_party/material_components_ios/src/components/NavigationBar/src/MaterialNavigationBar.h"
+#import "remoting/client/ios/app/pin_entry_view.h"
+#import "remoting/client/ios/domain/client_session_details.h"
+#import "remoting/client/ios/session/remoting_client.h"
+
+#include "base/strings/sys_string_conversions.h"
+#include "remoting/protocol/client_authentication_config.h"
+
+static const CGFloat kIconRadius = 30.f;
+static const CGFloat kActivityIndicatorStrokeWidth = 3.f;
+static const CGFloat kActivityIndicatorRadius = 33.f;
+
+static const CGFloat kPinEntryViewWidth = 240.f;
+static const CGFloat kPinEntryViewHeight = 90.f;
+
+static const CGFloat kCenterShift = -80.f;
+static const CGFloat kPadding = 20.f;
+static const CGFloat kMargin = 20.f;
+
+static const CGFloat kBarHeight = 58.f;
+
+@interface ClientConnectionViewController ()<PinEntryDelegate> {
+  UIImageView* _iconView;
+  MDCActivityIndicator* _activityIndicator;
+  UILabel* _statusLabel;
+  MDCNavigationBar* _navBar;
+  PinEntryView* _pinEntryView;
+  NSString* _remoteHostName;
+}
+@end
+
+@implementation ClientConnectionViewController
+
+@synthesize state = _state;
+@synthesize delegate = _delegate;
+
+- (id)init {
+  self = [super init];
+  if (self) {
+    self.navigationItem.rightBarButtonItem =
+        [[UIBarButtonItem alloc] initWithTitle:@"CANCEL"

[Yuwei, 2017/05/01 23:01:15]

Is this a placeholder before we do i18n? Or is this a magic string that makes
iOS feed localized string for the word "cancel"?

[nicholss, 2017/05/02 16:39:39]

it is placeholder. There will have to be a i18n sweep later

+                                         style:UIBarButtonItemStylePlain
+                                        target:self
+                                        action:@selector(didTapCancel:)];
+
+    _navBar = [[MDCNavigationBar alloc] initWithFrame:CGRectZero];
+    [_navBar observeNavigationItem:self.navigationItem];
+
+    [_navBar setBackgroundColor:[UIColor blackColor]];
+    MDCNavigationBarTextColorAccessibilityMutator* mutator =
+        [[MDCNavigationBarTextColorAccessibilityMutator alloc] init];
+    [mutator mutate:_navBar];
+    [self.view addSubview:_navBar];
+    _navBar.translatesAutoresizingMaskIntoConstraints = NO;
+  }
+  return self;
+}
+
+#pragma mark - UIViewController
+
+- (void)loadView {
+  [super loadView];
+
+  self.view.backgroundColor = [UIColor blackColor];
+
+  _navBar.frame = CGRectMake(0.f, 0.f, self.view.frame.size.width, kBarHeight);

[Yuwei, 2017/05/01 23:01:15]

Shall these be placed in layoutSubviews? What will happen if you rotate the
screen?

[nicholss, 2017/05/02 16:39:40]

Keeping me honest. thanks.

[nicholss, 2017/05/02 17:12:18]

An update, only a view has layoutSubviews, a view controller uses
viewWillLayoutSubviews and viewDidLayoutSubviews

[Yuwei, 2017/05/02 18:24:43]

Yes. I figured it out when working with the GLKView :)

+  [_navBar setNeedsLayout];
+
+  _activityIndicator = [[MDCActivityIndicator alloc] initWithFrame:CGRectZero];
+  [self.view addSubview:_activityIndicator];
+
+  _statusLabel = [[UILabel alloc] initWithFrame:CGRectZero];
+  [self.view addSubview:_statusLabel];
+
+  _iconView = [[UIImageView alloc] initWithFrame:CGRectZero];
+  [self.view addSubview:_iconView];
+
+  _pinEntryView = [[PinEntryView alloc] init];
+  [self.view addSubview:_pinEntryView];
+  _pinEntryView.delegate = self;
+}
+
+- (void)viewDidLoad {
+  [super viewDidLoad];
+
+  _iconView.frame = CGRectMake(0, 0, kIconRadius * 2, kIconRadius * 2.f);
+  _iconView.center =

[Yuwei, 2017/05/01 23:01:15]

Positioning code should be in layoutSubviews?

[nicholss, 2017/05/02 16:39:39]

Done.

+      CGPointMake(self.view.center.x, self.view.center.y + kCenterShift);
+  _iconView.contentMode = UIViewContentModeCenter;
+  _iconView.alpha = 0.87f;
+  _iconView.backgroundColor = UIColor.lightGrayColor;
+  _iconView.layer.cornerRadius = kIconRadius;
+  _iconView.layer.masksToBounds = YES;
+  _iconView.image = [UIImage imageNamed:@"ic_desktop"];
+
+  _activityIndicator.radius = kActivityIndicatorRadius;
+  _activityIndicator.trackEnabled = YES;
+  _activityIndicator.strokeWidth = kActivityIndicatorStrokeWidth;
+  _activityIndicator.cycleColors = @[ [UIColor whiteColor] ];
+  [_activityIndicator sizeToFit];
+  _activityIndicator.center = _iconView.center;
+
+  _statusLabel.numberOfLines = 1;
+  _statusLabel.lineBreakMode = NSLineBreakByTruncatingTail;
+  _statusLabel.textColor = [UIColor whiteColor];
+  _statusLabel.textAlignment = NSTextAlignmentCenter;
+
+  _statusLabel.frame =
+      CGRectMake(kMargin, _activityIndicator.center.y + kIconRadius + kPadding,

[Yuwei, 2017/05/01 23:01:15]

ditto

[nicholss, 2017/05/02 16:39:39]

Done.

+                 self.view.frame.size.width - kMargin * 2.f,
+                 _statusLabel.font.pointSize * _statusLabel.numberOfLines);
+
+  _pinEntryView.frame = CGRectMake(
+      (self.view.frame.size.width - kPinEntryViewWidth) / 2.f,

[Yuwei, 2017/05/01 23:01:15]

ditto

[nicholss, 2017/05/02 16:39:40]

Done.

+      _statusLabel.frame.origin.y + _statusLabel.frame.size.height + kPadding,
+      kPinEntryViewWidth, kPinEntryViewHeight);
+  _pinEntryView.hidden = YES;
+}
+
+- (void)viewWillAppear:(BOOL)animated {
+  [super viewWillAppear:animated];
+  [self.navigationController setNavigationBarHidden:YES animated:animated];
+
+  [[NSNotificationCenter defaultCenter]
+      addObserver:self
+         selector:@selector(hostSessionStatusChanged:)
+             name:kHostSessionStatusChanged
+           object:nil];
+}
+
+- (void)viewDidAppear:(BOOL)animated {
+  [super viewDidAppear:animated];
+  [[NSNotificationCenter defaultCenter]
+      addObserver:self
+         selector:@selector(keyboardWillShow:)
+             name:UIKeyboardWillShowNotification
+           object:nil];
+
+  [[NSNotificationCenter defaultCenter]
+      addObserver:self
+         selector:@selector(keyboardWillHide:)
+             name:UIKeyboardWillHideNotification
+           object:nil];
+
+  [_activityIndicator startAnimating];
+}
+
+- (void)viewWillDisappear:(BOOL)animated {
+  [super viewWillDisappear:animated];
+  [_activityIndicator stopAnimating];
+  [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
+#pragma mark - Keyboard
+
+- (void)keyboardWillShow:(NSNotification*)notification {
+  CGSize keyboardSize =
+      [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey]
+          CGRectValue]
+          .size;
+
+  [UIView
+      animateWithDuration:0.3
+               animations:^{
+                 CGRect f = self.view.frame;
+                 CGFloat newHeight =
+                     self.view.frame.size.height - keyboardSize.height;
+                 CGFloat overlap =
+                     newHeight - (_pinEntryView.frame.origin.y +
+                                  _pinEntryView.frame.size.height + kPadding);
+                 if (overlap < 0) {
+                   f.origin.y = overlap;
+                   self.view.frame = f;
+                 }
+               }];
+}
+
+- (void)keyboardWillHide:(NSNotification*)notification {
+  [UIView animateWithDuration:0.3
+                   animations:^{
+                     CGRect f = self.view.frame;
+                     f.origin.y = 0.f;
+                     self.view.frame = f;
+                   }];
+}
+
+#pragma mark - Properties
+
+- (void)setState:(ClientConnectionViewState)state {
+  _state = state;

[Yuwei, 2017/05/01 23:01:15]

You might want to return here if the delegate (_remoteHostName) is not set yet,
otherwise you might see a flickering with the text "Connecting to NULL".

[nicholss, 2017/05/02 16:39:40]

I set a default of "" for _remoteHostName.

+  switch (_state) {
+    case ClientViewConnecting:
+      [self showConnectingState];
+      break;
+    case ClientViewPinPrompt:
+      [self showPinPromptState];
+      break;
+    case ClientViewConnected:
+      [self showConnectedState];
+      break;
+  }
+}
+
+- (void)setDelegate:(id<ClientConnectionViewControllerDelegate>)delegate {

[Yuwei, 2017/05/01 23:01:15]

Is this method not being used yet?

[nicholss, 2017/05/02 16:39:39]

This is a magic part of obj-c, in the calling class there is something like
clientConnectionViewControler.delegate = self, this wires into the @property
defined in the interface.

To override the @property auto-generated methods you can define them in the
class. For example, for @property foo, the get method is just -(type)foo; and
the set is -(void)setFoo:(type)foo.

[Yuwei, 2017/05/02 18:24:44]

Acknowledged.

+  _delegate = delegate;
+  if (_delegate) {
+    _remoteHostName = [_delegate getConnectingHostName];
+    // To get the view to use the new remote host name.
+    [self setState:_state];
+  }
+}
+
+#pragma mark - Private
+
+- (void)showConnectingState {
+  [_pinEntryView endEditing:YES];
+  _statusLabel.text =
+      [NSString stringWithFormat:@"Connecting to %@", _remoteHostName];
+  [_activityIndicator stopAnimating];
+  _activityIndicator.cycleColors = @[ [UIColor whiteColor] ];
+  _activityIndicator.indicatorMode = MDCActivityIndicatorModeIndeterminate;
+  _activityIndicator.hidden = NO;
+  _pinEntryView.hidden = YES;
+  [_activityIndicator startAnimating];
+}
+
+- (void)showPinPromptState {
+  _statusLabel.text = [NSString stringWithFormat:@"%@", _remoteHostName];
+  [_activityIndicator stopAnimating];
+  _activityIndicator.hidden = YES;
+  _pinEntryView.hidden = NO;
+  [_pinEntryView becomeFirstResponder];
+}
+
+- (void)showConnectedState {
+  [_pinEntryView endEditing:YES];
+  _statusLabel.text =
+      [NSString stringWithFormat:@"Connected to %@", _remoteHostName];
+  _activityIndicator.progress = 0.0;
+  _pinEntryView.hidden = YES;
+  _activityIndicator.hidden = NO;
+  _activityIndicator.indicatorMode = MDCActivityIndicatorModeDeterminate;
+  _activityIndicator.cycleColors = @[ [UIColor greenColor] ];
+  [_activityIndicator startAnimating];
+  _activityIndicator.progress = 1.0;
+  [self dismissViewControllerAnimated:YES
+                           completion:^{
+                             [_delegate clientConnected];
+                           }];
+}
+
+- (void)didProvidePin:(NSString*)pin createPairing:(BOOL)createPairing {
+  // TODO(nicholss): send event.

[Yuwei, 2017/05/01 23:01:15]

Isn't the code below already sending event?

Also could you add TODO for createPairing?

[nicholss, 2017/05/02 16:39:40]

Done.

+  [[NSNotificationCenter defaultCenter]
+      postNotificationName:kHostSessionPinProvided
+                    object:self
+                  userInfo:[NSDictionary dictionaryWithObject:pin
+                                                       forKey:kHostSessionPin]];
+}
+
+- (void)didTapCancel:(id)sender {
+  NSLog(@"%@ was tapped.", NSStringFromClass([sender class]));
+  // TODO(nicholss): Need to cancel the pending connection.
+  [self dismissViewControllerAnimated:YES completion:nil];
+}
+
+- (void)hostSessionStatusChanged:(NSNotification*)notification {
+  ClientConnectionViewState state;
+  ClientSessionDetails* sessionDetails =
+      [[notification userInfo] objectForKey:kSessionDetails];
+  switch (sessionDetails.state) {
+    case SessionInitializing:
+    // Same as HostConnecting in UI. Fall-though.
+    case SessionAuthenticated:
+    // Same as HostConnecting in UI. Fall-though.
+    case SessionConnecting:
+      state = ClientViewConnecting;
+      break;
+    case SessionPinPrompt:
+      state = ClientViewPinPrompt;
+      break;
+    case SessionConnected:
+      state = ClientViewConnected;
+      break;
+    case SessionFailed:
+    // TODO(nicholss): Implement.
+    case SessionClosed:
+    // TODO(nicholss): Implement.
+    default:
+      LOG(ERROR) << "Unknown State for Session, " << sessionDetails.state;
+      return;
+  }
+  [[NSOperationQueue mainQueue] addOperationWithBlock:^{
+    [self setState:state];
+  }];
+}
+
+@end