Upstream Chrome on iOS source code [8/11].

ios/chrome/browser/ui/settings/password_details_collection_view_controller.mm

+// Copyright 2015 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/password_details_collection_view_controller.h"
+
+#import "base/ios/weak_nsobject.h"
+#include "base/mac/foundation_util.h"
+#include "base/mac/scoped_nsobject.h"
+#include "base/strings/sys_string_conversions.h"
+#include "components/autofill/core/common/password_form.h"
+#include "components/password_manager/core/browser/affiliation_utils.h"
+#include "components/password_manager/core/browser/password_store.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#import "ios/chrome/browser/ui/collection_view/cells/MDCCollectionViewCell+Chrome.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_item.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_text_item.h"
+#import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
+#import "ios/chrome/browser/ui/settings/cells/password_details_item.h"
+#import "ios/chrome/browser/ui/settings/reauthentication_module.h"
+#import "ios/chrome/browser/ui/settings/save_passwords_collection_view_controller.h"
+#include "ios/chrome/grit/ios_strings.h"
+#import "ios/third_party/material_components_ios/src/components/CollectionCells/src/MaterialCollectionCells.h"
+#import "ios/third_party/material_components_ios/src/components/Palettes/src/MaterialPalettes.h"
+#import "ios/third_party/material_components_ios/src/components/Snackbar/src/MaterialSnackbar.h"
+#include "ui/base/l10n/l10n_util_mac.h"
+
+namespace {
+
+typedef NS_ENUM(NSInteger, SectionIdentifier) {
+  SectionIdentifierUsername = kSectionIdentifierEnumZero,
+  SectionIdentifierPassword,
+};
+
+typedef NS_ENUM(NSInteger, ItemType) {
+  ItemTypeHeader = kItemTypeEnumZero,
+  ItemTypeUsername,
+  ItemTypePassword,
+  ItemTypeShow,
+  ItemTypeHide,
+  ItemTypeCopy,
+  ItemTypeDelete,
+};
+
+}  // namespace
+
+@interface PasswordDetailsCollectionViewController () {
+  // The username to which the saved password belongs.
+  base::scoped_nsobject<NSString> _username;
+  // The saved password.
+  base::scoped_nsobject<NSString> _password;
+  // Whether the password is shown in plain text form or in obscured form.
+  BOOL _plainTextPasswordShown;
+  // The password form.
+  autofill::PasswordForm _passwordForm;
+  // Instance of the parent view controller needed in order to update the
+  // password list when a password is deleted.
+  base::WeakNSProtocol<id<PasswordDetailsCollectionViewControllerDelegate>>
+      _weakDelegate;
+  // Module containing the reauthentication mechanism for viewing and copying
+  // passwords.
+  base::WeakNSProtocol<id<ReauthenticationProtocol>>
+      _weakReauthenticationModule;
+  // The password item.
+  base::scoped_nsobject<PasswordDetailsItem> _passwordItem;
+}
+
+@end
+
+@implementation PasswordDetailsCollectionViewController
+
+- (instancetype)
+  initWithPasswordForm:(autofill::PasswordForm)passwordForm
+              delegate:
+                  (id<PasswordDetailsCollectionViewControllerDelegate>)delegate
+reauthenticationModule:(id<ReauthenticationProtocol>)reauthenticationModule
+              username:(NSString*)username
+              password:(NSString*)password
+                origin:(NSString*)origin {
+  DCHECK(delegate);
+  DCHECK(reauthenticationModule);
+  self = [super initWithStyle:CollectionViewControllerStyleAppBar];
+  if (self) {
+    _weakDelegate.reset(delegate);
+    _weakReauthenticationModule.reset(reauthenticationModule);
+    _passwordForm = passwordForm;
+    _username.reset([username copy]);
+    _password.reset([password copy]);
+    self.title =
+        [PasswordDetailsCollectionViewController simplifyOrigin:origin];
+    NSNotificationCenter* defaultCenter = [NSNotificationCenter defaultCenter];
+    [defaultCenter addObserver:self
+                      selector:@selector(hidePassword:)
+                          name:UIApplicationDidEnterBackgroundNotification
+                        object:nil];
+
+    [self loadModel];
+  }
+  return self;
+}
+
++ (NSString*)simplifyOrigin:(NSString*)origin {
+  NSString* originWithoutScheme = nil;
+  if (![origin rangeOfString:@"://"].length) {
+    originWithoutScheme = origin;
+  } else {
+    originWithoutScheme =
+        [[origin componentsSeparatedByString:@"://"] objectAtIndex:1];
+  }
+  return
+      [[originWithoutScheme componentsSeparatedByString:@"/"] objectAtIndex:0];
+}
+
+#pragma mark - SettingsRootCollectionViewController
+
+- (void)loadModel {
+  [super loadModel];
+  CollectionViewModel* model = self.collectionViewModel;
+
+  [model addSectionWithIdentifier:SectionIdentifierUsername];
+  CollectionViewTextItem* usernameHeader = [
+      [[CollectionViewTextItem alloc] initWithType:ItemTypeHeader] autorelease];
+  usernameHeader.text =
+      l10n_util::GetNSString(IDS_IOS_SHOW_PASSWORD_VIEW_USERNAME);
+  [model setHeader:usernameHeader
+      forSectionWithIdentifier:SectionIdentifierUsername];
+  PasswordDetailsItem* usernameItem =
+      [[[PasswordDetailsItem alloc] initWithType:ItemTypeUsername] autorelease];
+  usernameItem.text = _username;
+  usernameItem.showingText = YES;
+  [model addItem:usernameItem
+      toSectionWithIdentifier:SectionIdentifierUsername];
+
+  [model addSectionWithIdentifier:SectionIdentifierPassword];
+  CollectionViewTextItem* passwordHeader = [
+      [[CollectionViewTextItem alloc] initWithType:ItemTypeHeader] autorelease];
+  passwordHeader.text =
+      l10n_util::GetNSString(IDS_IOS_SHOW_PASSWORD_VIEW_PASSWORD);
+  [model setHeader:passwordHeader
+      forSectionWithIdentifier:SectionIdentifierPassword];
+  _passwordItem.reset(
+      [[PasswordDetailsItem alloc] initWithType:ItemTypePassword]);
+  _passwordItem.get().text = _password;
+  _passwordItem.get().showingText = NO;
+  [model addItem:_passwordItem
+      toSectionWithIdentifier:SectionIdentifierPassword];
+
+  // TODO(crbug.com/159166): Change the style of the buttons once there are
+  // final mocks.
+  [model addItem:[self showPasswordButtonItem]
+      toSectionWithIdentifier:SectionIdentifierPassword];
+  [model addItem:[self hidePasswordButtonItem]
+      toSectionWithIdentifier:SectionIdentifierPassword];
+  [model addItem:[self passwordCopyButtonItem]
+      toSectionWithIdentifier:SectionIdentifierPassword];
+  [model addItem:[self deletePasswordButtonItem]
+      toSectionWithIdentifier:SectionIdentifierPassword];
+}
+
+- (void)dealloc {
+  [[NSNotificationCenter defaultCenter] removeObserver:self];
+  [super dealloc];
+}
+
+#pragma mark - Items
+
+- (CollectionViewItem*)showPasswordButtonItem {
+  CollectionViewTextItem* item =
+      [[[CollectionViewTextItem alloc] initWithType:ItemTypeShow] autorelease];
+  item.text = l10n_util::GetNSString(IDS_IOS_SETTINGS_PASSWORD_SHOW_BUTTON);
+  item.accessibilityTraits |= UIAccessibilityTraitButton;
+  return item;
+}
+
+- (CollectionViewItem*)passwordCopyButtonItem {
+  CollectionViewTextItem* item =
+      [[[CollectionViewTextItem alloc] initWithType:ItemTypeCopy] autorelease];
+  item.text = l10n_util::GetNSString(IDS_IOS_SETTINGS_PASSWORD_COPY_BUTTON);
+  item.accessibilityTraits |= UIAccessibilityTraitButton;
+  return item;
+}
+
+- (CollectionViewItem*)hidePasswordButtonItem {
+  CollectionViewTextItem* item =
+      [[[CollectionViewTextItem alloc] initWithType:ItemTypeHide] autorelease];
+  item.text = l10n_util::GetNSString(IDS_IOS_SETTINGS_PASSWORD_HIDE_BUTTON);
+  item.accessibilityTraits |= UIAccessibilityTraitButton;
+  return item;
+}
+
+- (CollectionViewItem*)deletePasswordButtonItem {
+  CollectionViewTextItem* item = [
+      [[CollectionViewTextItem alloc] initWithType:ItemTypeDelete] autorelease];
+  item.text = l10n_util::GetNSString(IDS_IOS_SETTINGS_PASSWORD_DELETE_BUTTON);
+  item.accessibilityTraits |= UIAccessibilityTraitButton;
+  return item;
+}
+
+#pragma mark - Actions
+
+- (void)showPassword {
+  if (_plainTextPasswordShown) {
+    return;
+  }
+
+  if ([_weakReauthenticationModule canAttemptReauth]) {
+    base::WeakNSObject<PasswordDetailsCollectionViewController> weakSelf(self);
+    void (^showPasswordHandler)(BOOL) = ^(BOOL success) {
+      base::scoped_nsobject<PasswordDetailsCollectionViewController> strongSelf(
+          [weakSelf retain]);
+      if (!strongSelf || !success)
+        return;
+      PasswordDetailsItem* passwordItem = strongSelf.get()->_passwordItem.get();
+      passwordItem.showingText = YES;
+      [strongSelf reconfigureCellsForItems:@[ passwordItem ]
+                   inSectionWithIdentifier:SectionIdentifierPassword];
+      [[strongSelf collectionView].collectionViewLayout invalidateLayout];
+      strongSelf.get()->_plainTextPasswordShown = YES;
+    };
+
+    [_weakReauthenticationModule
+        attemptReauthWithLocalizedReason:
+            l10n_util::GetNSString(IDS_IOS_SETTINGS_PASSWORD_REAUTH_REASON_SHOW)
+                                 handler:showPasswordHandler];
+  }
+}
+
+- (void)hidePassword {
+  if (!_plainTextPasswordShown) {
+    return;
+  }
+  _passwordItem.get().showingText = NO;
+  [self reconfigureCellsForItems:@[ _passwordItem ]
+         inSectionWithIdentifier:SectionIdentifierPassword];
+  [self.collectionView.collectionViewLayout invalidateLayout];
+  _plainTextPasswordShown = NO;
+}
+
+- (void)copyPassword {
+  // If the password is displayed in plain text, there is no need to
+  // re-authenticate the user when copying the password because they are already
+  // granted access to it.
+  if (_plainTextPasswordShown) {
+    UIPasteboard* generalPasteboard = [UIPasteboard generalPasteboard];
+    generalPasteboard.string = _password;
+    [self showCopyPasswordResultToast:
+              l10n_util::GetNSString(
+                  IDS_IOS_SETTINGS_PASSWORD_WAS_COPIED_MESSAGE)];
+  } else if ([_weakReauthenticationModule canAttemptReauth]) {
+    base::WeakNSObject<PasswordDetailsCollectionViewController> weakSelf(self);
+    void (^copyPasswordHandler)(BOOL) = ^(BOOL success) {
+      base::scoped_nsobject<PasswordDetailsCollectionViewController> strongSelf(
+          [weakSelf retain]);
+      if (!strongSelf)
+        return;
+      if (success) {
+        UIPasteboard* generalPasteboard = [UIPasteboard generalPasteboard];
+        generalPasteboard.string = strongSelf.get()->_password;
+        [strongSelf showCopyPasswordResultToast:
+                        l10n_util::GetNSString(
+                            IDS_IOS_SETTINGS_PASSWORD_WAS_COPIED_MESSAGE)];
+      } else {
+        [strongSelf showCopyPasswordResultToast:
+                        l10n_util::GetNSString(
+                            IDS_IOS_SETTINGS_PASSWORD_WAS_NOT_COPIED_MESSAGE)];
+      }
+    };
+    [_weakReauthenticationModule
+        attemptReauthWithLocalizedReason:
+            l10n_util::GetNSString(IDS_IOS_SETTINGS_PASSWORD_REAUTH_REASON_COPY)
+                                 handler:copyPasswordHandler];
+  }
+}
+
+- (void)showCopyPasswordResultToast:(NSString*)message {
+  MDCSnackbarMessage* copyPasswordResultMessage =
+      [MDCSnackbarMessage messageWithText:message];
+  [MDCSnackbarManager showMessage:copyPasswordResultMessage];
+}
+
+- (void)deletePassword {
+  [_weakDelegate deletePassword:_passwordForm];
+}
+
+#pragma mark - UICollectionViewDataSource
+
+- (UICollectionReusableView*)collectionView:(UICollectionView*)collectionView
+          viewForSupplementaryElementOfKind:(NSString*)kind
+                                atIndexPath:(NSIndexPath*)indexPath {
+  UICollectionReusableView* view = [super collectionView:collectionView
+                       viewForSupplementaryElementOfKind:kind
+                                             atIndexPath:indexPath];
+  MDCCollectionViewTextCell* textCell =
+      base::mac::ObjCCast<MDCCollectionViewTextCell>(view);
+  if (textCell) {
+    textCell.textLabel.textColor = [[MDCPalette greyPalette] tint500];
+  }
+  return view;
+};
+
+#pragma mark - UICollectionViewDelegate
+
+- (void)collectionView:(UICollectionView*)collectionView
+    didSelectItemAtIndexPath:(NSIndexPath*)indexPath {
+  [super collectionView:collectionView didSelectItemAtIndexPath:indexPath];
+  NSInteger itemType =
+      [self.collectionViewModel itemTypeForIndexPath:indexPath];
+  switch (itemType) {
+    case ItemTypeShow:
+      [self showPassword];
+      break;
+    case ItemTypeHide:
+      [self hidePassword];
+      break;
+    case ItemTypeCopy:
+      [self copyPassword];
+      break;
+    case ItemTypeDelete:
+      [self deletePassword];
+      break;
+    default:
+      break;
+  }
+}
+
+#pragma mark MDCCollectionViewStylingDelegate
+
+- (CGFloat)collectionView:(UICollectionView*)collectionView
+    cellHeightAtIndexPath:(NSIndexPath*)indexPath {
+  CollectionViewItem* item =
+      [self.collectionViewModel itemAtIndexPath:indexPath];
+  switch (item.type) {
+    case ItemTypeUsername:
+    case ItemTypePassword:
+      return [MDCCollectionViewCell
+          cr_preferredHeightForWidth:CGRectGetWidth(collectionView.bounds)
+                             forItem:item];
+    default:
+      return MDCCellDefaultOneLineHeight;
+  }
+}
+
+@end