Upstream Chrome on iOS source code [5/11].

ios/chrome/browser/ui/first_run/welcome_to_chrome_view_controller.mm

+// Copyright 2013 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.
+
+#include "ios/chrome/browser/ui/first_run/welcome_to_chrome_view_controller.h"
+
+#include "base/i18n/rtl.h"
+#include "base/ios/weak_nsobject.h"
+#include "base/logging.h"
+#include "base/mac/bundle_locations.h"
+#include "base/mac/foundation_util.h"
+#include "base/mac/objc_property_releaser.h"
+#include "base/mac/scoped_nsobject.h"
+#include "base/strings/sys_string_conversions.h"
+#include "components/metrics/metrics_pref_names.h"
+#include "components/metrics/metrics_reporting_default_state.h"
+#include "components/prefs/pref_service.h"
+#include "ios/chrome/browser/application_context.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/chrome/browser/first_run/first_run_configuration.h"
+#include "ios/chrome/browser/tabs/tab_model.h"
+#include "ios/chrome/browser/ui/fancy_ui/primary_action_button.h"
+#include "ios/chrome/browser/ui/file_locations.h"
+#import "ios/chrome/browser/ui/first_run/first_run_chrome_signin_view_controller.h"
+#include "ios/chrome/browser/ui/first_run/first_run_util.h"
+#include "ios/chrome/browser/ui/first_run/static_file_view_controller.h"
+#import "ios/chrome/browser/ui/first_run/welcome_to_chrome_view.h"
+#include "ios/chrome/browser/ui/ui_util.h"
+#import "ios/chrome/browser/ui/uikit_ui_util.h"
+#include "ios/chrome/common/string_util.h"
+#include "ios/chrome/grit/ios_chromium_strings.h"
+#include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
+#import "ios/public/provider/chrome/browser/signin/chrome_identity_service.h"
+#include "ui/base/l10n/l10n_util.h"
+
+NSString* const kUMAMetricsButtonAccessibilityIdentifier =
+    @"UMAMetricsButtonAccessibilityIdentifier";
+
+namespace {
+
+const CGFloat kFadeOutAnimationDuration = 0.16f;
+
+// Default value for metrics reporting state. "YES" corresponding to "opt-out"
+// state.
+const BOOL kDefaultStatsCheckboxValue = YES;
+}
+
+@interface WelcomeToChromeViewController ()<WelcomeToChromeViewDelegate> {
+  ios::ChromeBrowserState* browserState_;  // weak
+  TabModel* tabModel_;                     // weak
+  base::mac::ObjCPropertyReleaser
+      propertyReleaser_WelcomeToChromeViewController_;
+}
+
+// The animation which occurs at launch has run.
+@property(nonatomic, assign) BOOL ranLaunchAnimation;
+
+@end
+
+@implementation WelcomeToChromeViewController
+
+@synthesize ranLaunchAnimation = _ranLaunchAnimation;
+
++ (BOOL)defaultStatsCheckboxValue {
+  // Record metrics reporting as opt-in/opt-out only once.
+  static dispatch_once_t once;
+  dispatch_once(&once, ^{
+    metrics::RecordMetricsReportingDefaultState(
+        GetApplicationContext()->GetLocalState(),
+        kDefaultStatsCheckboxValue ? metrics::EnableMetricsDefault::OPT_OUT
+                                   : metrics::EnableMetricsDefault::OPT_IN);
+  });
+  return kDefaultStatsCheckboxValue;
+}
+
+- (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState
+                            tabModel:(TabModel*)tabModel {
+  DCHECK(browserState);
+  DCHECK(tabModel);
+  self = [super initWithNibName:nil bundle:nil];
+  if (self) {
+    browserState_ = browserState;
+    tabModel_ = tabModel;
+    propertyReleaser_WelcomeToChromeViewController_.Init(
+        self, [WelcomeToChromeViewController class]);
+  }
+  return self;
+}
+
+- (instancetype)initWithNibName:(nullable NSString*)nibNameOrNil
+                         bundle:(nullable NSBundle*)nibBundleOrNil {
+  NOTREACHED();
+  return nil;
+}
+
+- (instancetype)initWithCoder:(nonnull NSCoder*)aDecoder {
+  NOTREACHED();
+  return nil;
+}
+
+- (void)loadView {
+  base::scoped_nsobject<WelcomeToChromeView> welcomeToChromeView(
+      [[WelcomeToChromeView alloc] initWithFrame:CGRectZero]);
+  [welcomeToChromeView setDelegate:self];
+  [welcomeToChromeView
+      setCheckBoxSelected:[[self class] defaultStatsCheckboxValue]];
+  self.view = welcomeToChromeView;
+}
+
+- (void)viewDidLoad {
+  [super viewDidLoad];
+  [self.navigationController setNavigationBarHidden:YES];
+}
+
+- (void)viewDidLayoutSubviews {
+  [super viewDidLayoutSubviews];
+  if (self.ranLaunchAnimation)
+    return;
+  WelcomeToChromeView* view =
+      base::mac::ObjCCastStrict<WelcomeToChromeView>(self.view);
+  [view runLaunchAnimation];
+  self.ranLaunchAnimation = YES;
+}
+
+- (BOOL)prefersStatusBarHidden {
+  return YES;
+}
+
+- (NSURL*)newTermsOfServiceUrl {
+  std::string tos = GetTermsOfServicePath();
+  NSString* path = [[base::mac::FrameworkBundle() bundlePath]
+      stringByAppendingPathComponent:base::SysUTF8ToNSString(tos)];
+  base::scoped_nsobject<NSURLComponents> components(
+      [[NSURLComponents alloc] init]);
+  [components setScheme:@"file"];
+  [components setHost:@""];
+  [components setPath:path];
+  return [[components URL] retain];
+}
+
+// Displays the file at the given URL in a StaticFileViewController.
+- (void)openStaticFileWithURL:(NSURL*)url title:(NSString*)title {
+  base::scoped_nsobject<StaticFileViewController> staticViewController(
+      [[StaticFileViewController alloc] initWithBrowserState:browserState_
+                                                         URL:url]);
+  [staticViewController setTitle:title];
+  [self.navigationController pushViewController:staticViewController
+                                       animated:YES];
+}
+
+#pragma mark - WelcomeToChromeViewDelegate
+
+- (void)welcomeToChromeViewDidTapTOSLink:(WelcomeToChromeView*)view {
+  NSString* title = l10n_util::GetNSString(IDS_IOS_FIRSTRUN_TERMS_TITLE);
+  base::scoped_nsobject<NSURL> tosUrl([self newTermsOfServiceUrl]);
+  [self openStaticFileWithURL:tosUrl title:title];
+}
+
+- (void)welcomeToChromeViewDidTapOKButton:(WelcomeToChromeView*)view {
+  GetApplicationContext()->GetLocalState()->SetBoolean(
+      metrics::prefs::kMetricsReportingEnabled, view.checkBoxSelected);
+
+  base::scoped_nsobject<FirstRunConfiguration> firstRunConfig(
+      [[FirstRunConfiguration alloc] init]);
+  bool hasSSOAccounts = ios::GetChromeBrowserProvider()
+                            ->GetChromeIdentityService()
+                            ->HasIdentities();
+  [firstRunConfig setHasSSOAccount:hasSSOAccounts];
+  base::scoped_nsobject<FirstRunChromeSigninViewController> signInController(
+      [[FirstRunChromeSigninViewController alloc]
+          initWithBrowserState:browserState_
+                      tabModel:tabModel_
+                firstRunConfig:firstRunConfig
+                signInIdentity:nil]);
+
+  CATransition* transition = [CATransition animation];
+  transition.duration = kFadeOutAnimationDuration;
+  transition.type = kCATransitionFade;
+  [self.navigationController.view.layer addAnimation:transition
+                                              forKey:kCATransition];
+  [self.navigationController pushViewController:signInController animated:NO];
+}
+
+@end