Tweak disappearing messages indicator.

Signal/src/ViewControllers/ConversationView/Cells/OWSMessageFooterView.m

@@ -40,12 +40,20 @@ NS_ASSUME_NONNULL_BEGIN
     self.axis = UILayoutConstraintAxisHorizontal;
     self.spacing = self.hSpacing;
     self.alignment = UIStackViewAlignmentCenter;
+    self.distribution = UIStackViewDistributionEqualSpacing;
+
+    UIStackView *leftStackView = [UIStackView new];
+    leftStackView.axis = UILayoutConstraintAxisHorizontal;
+    leftStackView.spacing = self.hSpacing;
+    leftStackView.alignment = UIStackViewAlignmentCenter;
+    [self addArrangedSubview:leftStackView];
 
     self.timestampLabel = [UILabel new];
-    [self addArrangedSubview:self.timestampLabel];
+    [leftStackView addArrangedSubview:self.timestampLabel];
 
     self.messageTimerView = [OWSMessageTimerView new];
-    [self addArrangedSubview:self.messageTimerView];
+    [self.messageTimerView setContentHuggingHigh];
+    [leftStackView addArrangedSubview:self.messageTimerView];
 
     self.statusIndicatorImageView = [UIImageView new];
     [self.statusIndicatorImageView setContentHuggingHigh];

Signal/src/ViewControllers/ConversationView/ConversationViewController.m

@@ -4807,6 +4807,7 @@ typedef enum : NSUInteger {
             TSOutgoingMessage *outgoingMessage = (TSOutgoingMessage *)viewItem.interaction;
             MessageReceiptStatus receiptStatus =
                 [MessageRecipientStatusUtils recipientStatusWithOutgoingMessage:outgoingMessage];
+            BOOL isDisappearingMessage = outgoingMessage.shouldStartExpireTimer;
 
             if (nextViewItem && nextViewItem.interaction.interactionType == interactionType) {
                 TSOutgoingMessage *nextOutgoingMessage = (TSOutgoingMessage *)nextViewItem.interaction;
@@ -4816,10 +4817,12 @@ typedef enum : NSUInteger {
 
                 // We can skip the "outgoing message status" footer if the next message
                 // has the same footer and no "date break" separates us...
-                // ...but always show "failed to send" status.
-                shouldHideFooter = ([timestampText isEqualToString:nextTimestampText]
-                    && receiptStatus == nextReceiptStatus
-                    && outgoingMessage.messageState != TSOutgoingMessageStateFailed && !nextViewItem.shouldShowDate);
+                // ...but always show "failed to send" status
+                // ...and always show the "disappearing messages" animation.
+                shouldHideFooter
+                    = ([timestampText isEqualToString:nextTimestampText] && receiptStatus == nextReceiptStatus
+                        && outgoingMessage.messageState != TSOutgoingMessageStateFailed && !nextViewItem.shouldShowDate
+                        && !isDisappearingMessage);
             }
 
             // clustering
@@ -4843,6 +4846,7 @@ typedef enum : NSUInteger {
             TSIncomingMessage *incomingMessage = (TSIncomingMessage *)viewItem.interaction;
             NSString *incomingSenderId = incomingMessage.authorId;
             OWSAssert(incomingSenderId.length > 0);
+            BOOL isDisappearingMessage = incomingMessage.shouldStartExpireTimer;
 
             NSString *_Nullable nextIncomingSenderId = nil;
             if (nextViewItem && nextViewItem.interaction.interactionType == interactionType) {
@@ -4855,8 +4859,10 @@ typedef enum : NSUInteger {
                 NSString *nextTimestampText = [DateUtil formatTimestampShort:nextViewItem.interaction.timestamp];
                 // We can skip the "incoming message status" footer in a cluster if the next message
                 // has the same footer and no "date break" separates us.
-                shouldHideFooter = [timestampText isEqualToString:nextTimestampText] && !nextViewItem.shouldShowDate &&
-                    [NSObject isNullableObject:nextIncomingSenderId equalTo:incomingSenderId];
+                // ...but always show the "disappearing messages" animation.
+                shouldHideFooter = ([timestampText isEqualToString:nextTimestampText] && !nextViewItem.shouldShowDate &&
+                    [NSObject isNullableObject:nextIncomingSenderId equalTo:incomingSenderId]
+                    && !isDisappearingMessage);
             }
 
             // clustering