Tweak intra-cell spacing.

Signal/src/ViewControllers/ConversationView/ConversationViewController.m

@@ -4910,13 +4910,15 @@ typedef enum : NSUInteger {
         }
         lastInteractionType = interactionType;
 
-        // If this is an existing view item and it has changed size,
-        // note that so that we can reload this cell while doing
-        // incremental updates.
+        // When `shouldHideRecipientStatus` changes, reload the cell if necessary.
         if (viewItem.shouldHideRecipientStatus != shouldHideRecipientStatus && viewItem.previousRow != NSNotFound) {
             [rowsThatChangedSize addObject:@(viewItem.previousRow)];
         }
         viewItem.shouldHideRecipientStatus = shouldHideRecipientStatus;
+        // When `shouldHideAvatar` changes, reload the cell if necessary.
+        if (viewItem.shouldHideAvatar != shouldHideAvatar && viewItem.previousRow != NSNotFound) {
+            [rowsThatChangedSize addObject:@(viewItem.previousRow)];
+        }
         viewItem.shouldHideAvatar = shouldHideAvatar;
     }
 

Signal/src/ViewControllers/ConversationView/ConversationViewItem.m

@@ -271,8 +271,21 @@ NSString *NSStringForOWSMessageCellType(OWSMessageCellType cellType)
         return 0.f;
     }
 
+    // "Bubble Collapse".  Adjacent messages with the same author should be close together.
+    if (self.interaction.interactionType == OWSInteractionType_IncomingMessage
+        && previousLayoutItem.interaction.interactionType == OWSInteractionType_IncomingMessage) {
+        TSIncomingMessage *incomingMessage = (TSIncomingMessage *)self.interaction;
+        TSIncomingMessage *previousIncomingMessage = (TSIncomingMessage *)previousLayoutItem.interaction;
+        if ([incomingMessage.authorId isEqualToString:previousIncomingMessage.authorId]) {
+            return 2.f;
+        }
+    } else if (self.interaction.interactionType == OWSInteractionType_OutgoingMessage
+        && previousLayoutItem.interaction.interactionType == OWSInteractionType_OutgoingMessage) {
+        return 2.f;
+    }
+
     // TODO:
-    return 4.f;
+    return 10.f;
 }
 
 - (ConversationViewCell *)dequeueCellForCollectionView:(UICollectionView *)collectionView

Signal/src/ViewControllers/HomeView/HomeViewCell.m

@@ -233,7 +233,6 @@ NS_ASSUME_NONNULL_BEGIN
                                                                relation:NSLayoutRelationGreaterThanOrEqual],
                                      [self.unreadBadge autoSetDimension:ALDimensionHeight toSize:unreadBadgeHeight],
                                  ]];
-
                              }];
 
         const CGFloat kMinVMargin = 5;