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

ios/chrome/browser/passwords/password_generation_prompt_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/passwords/password_generation_prompt_view_controller.h"
+
+#import <UIKit/UIKit.h>
+
+#include "base/ios/weak_nsobject.h"
+#include "base/mac/scoped_nsobject.h"
+#import "ios/chrome/browser/passwords/password_generation_prompt_view.h"
+#import "ios/chrome/browser/ui/rtl_geometry.h"
+#import "ios/chrome/browser/ui/uikit_ui_util.h"
+#import "ios/third_party/material_components_ios/src/components/Dialogs/src/MaterialDialogs.h"
+
+namespace {
+// Material Design Component constraints.
+const CGFloat kMDCPadding = 24;
+const CGFloat kMDCMargin = 40;
+
+// Maximum size of the dialog.
+const CGFloat kPrefWidth = 450;
+const CGFloat kPrefHeight = 500;
+
+}  // namespace
+
+@interface PasswordGenerationPromptViewController () {
+  base::scoped_nsobject<NSString> _password;
+  base::WeakNSObject<UIViewController> _viewController;
+  base::WeakNSObject<PasswordGenerationPromptDialog> _contentView;
+}
+
+// Returns the maximum size of the dialog.
+- (CGFloat)maxDialogWidth;
+
+@end
+
+@implementation PasswordGenerationPromptViewController
+
+- (CGFloat)maxDialogWidth {
+  CGFloat screenWidth = [[UIScreen mainScreen] bounds].size.width;
+  return MIN(kPrefWidth, screenWidth - 2 * kMDCMargin);
+}
+
+- (instancetype)initWithPassword:(NSString*)password
+                     contentView:(PasswordGenerationPromptDialog*)contentView
+                  viewController:(UIViewController*)viewController {
+  self = [super initWithNibName:nil bundle:nil];
+  if (self) {
+    _password.reset([password copy]);
+    _viewController.reset(viewController);
+    _contentView.reset(contentView);
+    self.modalPresentationStyle = UIModalPresentationCustom;
+    self.transitioningDelegate =
+        [[[MDCDialogTransitionController alloc] init] autorelease];
+  }
+  return self;
+}
+
+- (void)viewDidLoad {
+  [super viewDidLoad];
+
+  self.view.backgroundColor = [UIColor whiteColor];
+
+  [_contentView configureGlobalViewWithPassword:_password];
+  [_contentView setTranslatesAutoresizingMaskIntoConstraints:NO];
+
+  self.preferredContentSize = CGSizeMake([self maxDialogWidth], kPrefHeight);
+
+  [self.view addSubview:_contentView];
+
+  NSArray* constraints = @[
+    @"V:|-(MDCPadding)-[view]", @"H:|-(MDCPadding)-[view]-(MDCPadding)-|"
+  ];
+  NSDictionary* viewsDictionary = @{ @"view" : _contentView };
+  NSDictionary* metrics = @{ @"MDCPadding" : @(kMDCPadding) };
+
+  ApplyVisualConstraintsWithMetricsAndOptions(
+      constraints, viewsDictionary, metrics, LayoutOptionForRTLSupport());
+}
+
+- (void)viewDidLayoutSubviews {
+  CGSize currentSize = CGSizeMake(
+      [self maxDialogWidth], [_contentView frame].size.height + kMDCPadding);
+  self.preferredContentSize = currentSize;
+}
+
+@end