[ios] combine password cells for manual fallback

Also gray out "No Username" label.

Bug: 905663
Change-Id: Iabbbf1ce7d20f62e72896ad08b5a239d0fbd14dc
Reviewed-on: https://chromium-review.googlesource.com/c/1350616
Commit-Queue: David Jean <djean@chromium.org>
Reviewed-by: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611091}

ios/chrome/browser/ui/autofill/manual_fill/manual_fill_cell_utils.h

@@ -7,17 +7,48 @@
 
 #import <UIKit/UIKit.h>
 
+namespace {
+
+// The multiplier for the base system spacing at the top margin.
+static const CGFloat TopSystemSpacingMultiplier = 1.58;
+
+// The multiplier for the base system spacing between elements (vertical).
+static const CGFloat MiddleSystemSpacingMultiplier = 1.83;
+
+// The multiplier for the base system spacing at the bottom margin.
+static const CGFloat BottomSystemSpacingMultiplier = 2.26;
+
+// Top and bottom margins for buttons.
+static const CGFloat ButtonVerticalMargin = 12;
+
+// Left and right margins of the cell content and buttons.
+static const CGFloat ButtonHorizontalMargin = 16;
+
+}  // namespace
+
 // Creates a blank button in fallback style, for the given |action| and
 // |target|.
 UIButton* CreateButtonWithSelectorAndTarget(SEL action, id target);
 
 // Sets vertical constraints on firstBaselineAnchor for the button or label rows
 // in |views| inside |container| starting at its topAnchor. Returns the applied
-// constrainst to allow caller to deactivate them later.
+// constrainst to allow caller to deactivate them later.  Defaults multipliers
+// are applied.
 NSArray<NSLayoutConstraint*>* VerticalConstraintsSpacingForViewsInContainer(
     NSArray<UIView*>* views,
     UIView* container);
 
+// Sets vertical constraints on firstBaselineAnchor for the button or label rows
+// in |views| inside |container| starting at its topAnchor. Returns the applied
+// constrainst to allow caller to deactivate them later.
+NSArray<NSLayoutConstraint*>*
+VerticalConstraintsSpacingForViewsInContainerWithMultipliers(
+    NSArray<UIView*>* views,
+    UIView* container,
+    CGFloat topSystemSpacingMultiplier,
+    CGFloat middleSystemSpacingMultiplier,
+    CGFloat BottomSystemSpacingMultiplier);
+
 // Sets constraints for the given |views|, so as to lay them out horizontally,
 // parallel to the given |guide| view, and applying the given constant |shift|
 // to the whole row. Returns the applied constraints to allow caller to

ios/chrome/browser/ui/autofill/manual_fill/manual_fill_cell_utils.mm

@@ -16,25 +16,6 @@
 #error "This file requires ARC support."
 #endif
 
-namespace {
-
-// The multiplier for the base system spacing at the top margin.
-static const CGFloat TopSystemSpacingMultiplier = 1.58;
-
-// The multiplier for the base system spacing between elements (vertical).
-static const CGFloat MiddleSystemSpacingMultiplier = 1.83;
-
-// The multiplier for the base system spacing at the bottom margin.
-static const CGFloat BottomSystemSpacingMultiplier = 2.26;
-
-// Top and bottom margins for buttons.
-static const CGFloat ButtonVerticalMargin = 12;
-
-// Left and right margins of the cell content and buttons.
-static const CGFloat ButtonHorizontalMargin = 16;
-
-}  // namespace
-
 UIButton* CreateButtonWithSelectorAndTarget(SEL action, id target) {
   UIButton* button = [ManualFillCellButton buttonWithType:UIButtonTypeCustom];
   [button setTitleColor:UIColor.cr_manualFillTintColor
@@ -57,21 +38,33 @@ UIButton* CreateButtonWithSelectorAndTarget(SEL action, id target) {
 NSArray<NSLayoutConstraint*>* VerticalConstraintsSpacingForViewsInContainer(
     NSArray<UIView*>* views,
     UIView* container) {
+  return VerticalConstraintsSpacingForViewsInContainerWithMultipliers(
+      views, container, TopSystemSpacingMultiplier,
+      MiddleSystemSpacingMultiplier, BottomSystemSpacingMultiplier);
+}
+
+NSArray<NSLayoutConstraint*>*
+VerticalConstraintsSpacingForViewsInContainerWithMultipliers(
+    NSArray<UIView*>* views,
+    UIView* container,
+    CGFloat topSystemSpacingMultiplier,
+    CGFloat middleSystemSpacingMultiplier,
+    CGFloat bottomSystemSpacingMultiplier) {
   NSMutableArray* verticalConstraints = [[NSMutableArray alloc] init];
 
   // Multipliers of these constraints are calculated based on a 24 base
   // system spacing.
   NSLayoutYAxisAnchor* previousAnchor = container.topAnchor;
-  CGFloat multiplier = TopSystemSpacingMultiplier;
+  CGFloat multiplier = topSystemSpacingMultiplier;
   for (UIView* view in views) {
     [verticalConstraints
         addObject:[view.firstBaselineAnchor
                       constraintEqualToSystemSpacingBelowAnchor:previousAnchor
                                                      multiplier:multiplier]];
-    multiplier = MiddleSystemSpacingMultiplier;
+    multiplier = middleSystemSpacingMultiplier;
     previousAnchor = view.lastBaselineAnchor;
   }
-  multiplier = BottomSystemSpacingMultiplier;
+  multiplier = bottomSystemSpacingMultiplier;
   [verticalConstraints
       addObject:[container.bottomAnchor
                     constraintEqualToSystemSpacingBelowAnchor:previousAnchor

ios/chrome/browser/ui/autofill/manual_fill/manual_fill_password_cell.h

@@ -16,6 +16,8 @@
 @interface ManualFillCredentialItem : TableViewItem
 
 - (instancetype)initWithCredential:(ManualFillCredential*)credential
+         isConnectedToPreviousItem:(BOOL)isConnectedToPreviousItem
+             isConnectedToNextItem:(BOOL)isConnectedToNextItem
                           delegate:(id<ManualFillContentDelegate>)delegate
     NS_DESIGNATED_INITIALIZER;
 
@@ -30,6 +32,8 @@
 // Updates the cell with the |credential|. If the user iteracts with it, the
 // |delegate| will be notified.
 - (void)setUpWithCredential:(ManualFillCredential*)credential
+    isConnectedToPreviousCell:(BOOL)isConnectedToPreviousCell
+        isConnectedToNextCell:(BOOL)isConnectedToNextCell
                      delegate:(id<ManualFillContentDelegate>)delegate;
 
 @end

ios/chrome/browser/ui/autofill/manual_fill/manual_fill_password_cell.mm

@@ -19,10 +19,20 @@
 #endif
 
 @interface ManualFillCredentialItem ()
+
 // The credential for this item.
 @property(nonatomic, strong, readonly) ManualFillCredential* credential;
+
+// The cell won't show a title (site name) label if it is connected to the
+// previous password item.
+@property(nonatomic, assign) BOOL isConnectedToPreviousItem;
+
+// The separator line won't show if it is connected to the next password item.
+@property(nonatomic, assign) BOOL isConnectedToNextItem;
+
 // The delegate for this item.
 @property(nonatomic, weak, readonly) id<ManualFillContentDelegate> delegate;
+
 @end
 
 @implementation ManualFillCredentialItem
@@ -30,10 +40,14 @@
 @synthesize credential = _credential;
 
 - (instancetype)initWithCredential:(ManualFillCredential*)credential
+         isConnectedToPreviousItem:(BOOL)isConnectedToPreviousItem
+             isConnectedToNextItem:(BOOL)isConnectedToNextItem
                           delegate:(id<ManualFillContentDelegate>)delegate {
   self = [super initWithType:kItemTypeEnumZero];
   if (self) {
     _credential = credential;
+    _isConnectedToPreviousItem = isConnectedToPreviousItem;
+    _isConnectedToNextItem = isConnectedToNextItem;
     _delegate = delegate;
     self.cellClass = [ManualFillPasswordCell class];
   }
@@ -43,37 +57,55 @@
 - (void)configureCell:(ManualFillPasswordCell*)cell
            withStyler:(ChromeTableViewStyler*)styler {
   [super configureCell:cell withStyler:styler];
-  [cell setUpWithCredential:self.credential delegate:self.delegate];
+  [cell setUpWithCredential:self.credential
+      isConnectedToPreviousCell:self.isConnectedToPreviousItem
+          isConnectedToNextCell:self.isConnectedToNextItem
+                       delegate:self.delegate];
 }
 
 @end
 
 namespace {
+
 // Left and right margins of the cell content.
 static const CGFloat SideMargins = 16;
+
+// The multiplier for the base system spacing at the top margin for connected
+// cells.
+static const CGFloat TopSystemSpacingMultiplierForConnectedCell = 1.28;
+
+// When no extra multiplier is required.
+static const CGFloat NoMultiplier = 1.0;
+
 }  // namespace
 
 @interface ManualFillPasswordCell ()
+
 // The credential this cell is showing.
 @property(nonatomic, strong) ManualFillCredential* manualFillCredential;
+
+// The vertical constraints for all the lines.
+@property(nonatomic, strong) NSArray<NSLayoutConstraint*>* verticalConstraints;
+
 // The label with the site name and host.
 @property(nonatomic, strong) UILabel* siteNameLabel;
+
 // A button showing the username, or "No Username".
 @property(nonatomic, strong) UIButton* usernameButton;
+
 // A button showing "••••••••" to resemble a password.
 @property(nonatomic, strong) UIButton* passwordButton;
+
+// Separator line between cells, if needed.
+@property(nonatomic, strong) UIView* grayLine;
+
 // The delegate in charge of processing the user actions in this cell.
 @property(nonatomic, weak) id<ManualFillContentDelegate> delegate;
+
 @end
 
 @implementation ManualFillPasswordCell
 
-@synthesize manualFillCredential = _manualFillCredential;
-@synthesize siteNameLabel = _siteNameLabel;
-@synthesize usernameButton = _usernameButton;
-@synthesize passwordButton = _passwordButton;
-@synthesize delegate = _delegate;
-
 #pragma mark - Public
 
 - (void)prepareForReuse {
@@ -86,12 +118,20 @@ static const CGFloat SideMargins = 16;
 }
 
 - (void)setUpWithCredential:(ManualFillCredential*)credential
+    isConnectedToPreviousCell:(BOOL)isConnectedToPreviousCell
+        isConnectedToNextCell:(BOOL)isConnectedToNextCell
                      delegate:(id<ManualFillContentDelegate>)delegate {
   if (self.contentView.subviews.count == 0) {
     [self createViewHierarchy];
   }
   self.delegate = delegate;
   self.manualFillCredential = credential;
+
+  NSMutableArray<UIView*>* verticalLeadViews = [[NSMutableArray alloc] init];
+
+  if (isConnectedToPreviousCell) {
+    self.siteNameLabel.hidden = YES;
+  } else {
     NSMutableAttributedString* attributedString =
         [[NSMutableAttributedString alloc]
             initWithString:credential.siteName ? credential.siteName : @""
@@ -114,8 +154,11 @@ static const CGFloat SideMargins = 16;
                                           attributes:attributes];
       [attributedString appendAttributedString:hostAttributedString];
     }
-
     self.siteNameLabel.attributedText = attributedString;
+    [verticalLeadViews addObject:self.siteNameLabel];
+    self.siteNameLabel.hidden = NO;
+  }
+
   if (credential.username.length) {
     [self.usernameButton setTitle:credential.username
                          forState:UIControlStateNormal];
@@ -123,12 +166,37 @@ static const CGFloat SideMargins = 16;
     NSString* titleString =
         l10n_util::GetNSString(IDS_IOS_MANUAL_FALLBACK_NO_USERNAME);
     [self.usernameButton setTitle:titleString forState:UIControlStateNormal];
+    [self.usernameButton setTitleColor:UIColor.lightGrayColor
+                              forState:UIControlStateNormal];
     self.usernameButton.enabled = NO;
   }
+  [verticalLeadViews addObject:self.usernameButton];
 
   if (credential.password.length) {
     [self.passwordButton setTitle:@"••••••••" forState:UIControlStateNormal];
+    [verticalLeadViews addObject:self.passwordButton];
+    self.passwordButton.hidden = NO;
+  } else {
+    self.passwordButton.hidden = YES;
+  }
+
+  if (!isConnectedToNextCell) {
+    [verticalLeadViews addObject:self.grayLine];
+    self.grayLine.hidden = NO;
+  } else {
+    self.grayLine.hidden = YES;
   }
+
+  CGFloat topSystemSpacingMultiplier =
+      isConnectedToPreviousCell ? TopSystemSpacingMultiplierForConnectedCell
+                                : TopSystemSpacingMultiplier;
+  CGFloat bottomSystemSpacingMultiplier =
+      isConnectedToNextCell ? NoMultiplier : BottomSystemSpacingMultiplier;
+
+  self.verticalConstraints =
+      VerticalConstraintsSpacingForViewsInContainerWithMultipliers(
+          verticalLeadViews, self.contentView, topSystemSpacingMultiplier,
+          MiddleSystemSpacingMultiplier, bottomSystemSpacingMultiplier);
 }
 
 #pragma mark - Private
@@ -137,10 +205,10 @@ static const CGFloat SideMargins = 16;
 - (void)createViewHierarchy {
   self.selectionStyle = UITableViewCellSelectionStyleNone;
 
-  UIView* grayLine = [[UIView alloc] init];
-  grayLine.backgroundColor = UIColor.cr_manualFillGrayLineColor;
-  grayLine.translatesAutoresizingMaskIntoConstraints = NO;
-  [self.contentView addSubview:grayLine];
+  self.grayLine = [[UIView alloc] init];
+  self.grayLine.backgroundColor = UIColor.cr_manualFillGrayLineColor;
+  self.grayLine.translatesAutoresizingMaskIntoConstraints = NO;
+  [self.contentView addSubview:self.grayLine];
 
   UIView* guide = self.contentView;
 
@@ -163,22 +231,18 @@ static const CGFloat SideMargins = 16;
   HorizontalConstraintsForViewsOnGuideWithShift(@[ self.passwordButton ], guide,
                                                 0);
 
-  VerticalConstraintsSpacingForViewsInContainer(
-      @[ self.siteNameLabel, self.usernameButton, self.passwordButton ],
-      self.contentView);
-
   id<LayoutGuideProvider> safeArea = self.contentView.safeAreaLayoutGuide;
-
   [NSLayoutConstraint activateConstraints:@[
     // Common vertical constraints.
-    [grayLine.bottomAnchor
+    [self.grayLine.bottomAnchor
         constraintEqualToAnchor:self.contentView.bottomAnchor],
-    [grayLine.heightAnchor constraintEqualToConstant:1],
+    [self.grayLine.heightAnchor constraintEqualToConstant:1],
 
     // Horizontal constraints.
-    [grayLine.leadingAnchor constraintEqualToAnchor:safeArea.leadingAnchor
+    [self.grayLine.leadingAnchor constraintEqualToAnchor:safeArea.leadingAnchor
                                                 constant:SideMargins],
-    [safeArea.trailingAnchor constraintEqualToAnchor:grayLine.trailingAnchor
+    [safeArea.trailingAnchor
+        constraintEqualToAnchor:self.grayLine.trailingAnchor
                        constant:SideMargins],
   ]];
 }

ios/chrome/browser/ui/autofill/manual_fill/password_mediator.mm

@@ -39,6 +39,19 @@ NSString* const OtherPasswordsAccessibilityIdentifier =
 
 }  // namespace manual_fill
 
+// Checks if two credential are connected. They are considered connected if they
+// have same host.
+BOOL AreCredentialsAtIndexesConnected(
+    NSArray<ManualFillCredential*>* credentials,
+    int firstIndex,
+    int secondIndex) {
+  if (firstIndex < 0 || firstIndex >= (int)credentials.count ||
+      secondIndex < 0 || secondIndex >= (int)credentials.count)
+    return NO;
+  return [credentials[firstIndex].host
+      isEqualToString:credentials[secondIndex].host];
+}
+
 @interface ManualFillPasswordMediator ()<ManualFillContentDelegate,
                                          PasswordFetcherDelegate>
 // The |WebStateList| containing the active web state. Used to filter the list
@@ -167,8 +180,16 @@ NSString* const OtherPasswordsAccessibilityIdentifier =
     (NSArray<ManualFillCredential*>*)credentials {
   NSMutableArray* items =
       [[NSMutableArray alloc] initWithCapacity:credentials.count];
-  for (ManualFillCredential* credential in credentials) {
-    auto item = [[ManualFillCredentialItem alloc] initWithCredential:credential
+  for (int i = 0; i < (int)credentials.count; i++) {
+    BOOL isConnectedToPreviousItem =
+        AreCredentialsAtIndexesConnected(credentials, i, i - 1);
+    BOOL isConnectedToNextItem =
+        AreCredentialsAtIndexesConnected(credentials, i, i + 1);
+    ManualFillCredential* credential = credentials[i];
+    auto item = [[ManualFillCredentialItem alloc]
+               initWithCredential:credential
+        isConnectedToPreviousItem:isConnectedToPreviousItem
+            isConnectedToNextItem:isConnectedToNextItem
                          delegate:self];
     [items addObject:item];
   }