Some fixes for windowed render

js/views/conversation_view.js

@@ -2252,12 +2252,18 @@
 
       const existing = this.model.get('quotedMessageId');
       if (existing !== messageId) {
-        const timestamp = messageId ? Date.now() : null;
         this.model.set({
           quotedMessageId: messageId,
-          draftTimestamp: timestamp,
-          timestamp,
         });
+
+        if (messageId) {
+          const timestamp = Date.now();
+          this.model.set({
+            draftTimestamp: timestamp,
+            timestamp,
+          });
+        }
+
         await this.saveModel();
       }
 

ts/components/conversation/Timeline.tsx

@@ -494,6 +494,10 @@ export class Timeline extends React.PureComponent<Props, State> {
       renderTypingBubble,
     } = this.props;
 
+    const styleWithWidth = {
+      ...style,
+      width: `${this.mostRecentWidth}px`,
+    };
     const row = index;
     const oldestUnreadRow = this.getLastSeenIndicatorRow();
     const typingBubbleRow = this.getTypingBubbleRow();
@@ -501,13 +505,13 @@ export class Timeline extends React.PureComponent<Props, State> {
 
     if (!haveOldest && row === 0) {
       rowContents = (
-        <div data-row={row} style={style}>
+        <div data-row={row} style={styleWithWidth}>
           {renderLoadingRow(id)}
         </div>
       );
     } else if (oldestUnreadRow === row) {
       rowContents = (
-        <div data-row={row} style={style}>
+        <div data-row={row} style={styleWithWidth}>
           {renderLastSeenIndicator(id)}
         </div>
       );
@@ -516,7 +520,7 @@ export class Timeline extends React.PureComponent<Props, State> {
         <div
           data-row={row}
           className="module-timeline__message-container"
-          style={style}
+          style={styleWithWidth}
         >
           {renderTypingBubble(id)}
         </div>
@@ -534,7 +538,7 @@ export class Timeline extends React.PureComponent<Props, State> {
           id={messageId}
           data-row={row}
           className="module-timeline__message-container"
-          style={style}
+          style={styleWithWidth}
         >
           {renderItem(messageId, this.props)}
         </div>
@@ -715,6 +719,7 @@ export class Timeline extends React.PureComponent<Props, State> {
     this.updateWithVisibleRows(forceFocus);
   };
 
+  // tslint:disable-next-line cyclomatic-complexity
   public componentDidUpdate(prevProps: Props) {
     const {
       id,
@@ -763,35 +768,48 @@ export class Timeline extends React.PureComponent<Props, State> {
         const oldFirstIndex = 0;
         const oldFirstId = prevProps.items[oldFirstIndex];
 
-        const newIndex = items.findIndex(item => item === oldFirstId);
-        if (newIndex < 0) {
+        const newFirstIndex = items.findIndex(item => item === oldFirstId);
+        if (newFirstIndex < 0) {
           this.resizeAll();
 
           return;
         }
 
-        const newRow = this.fromItemIndexToRow(newIndex);
+        const newRow = this.fromItemIndexToRow(newFirstIndex);
+        const delta = newFirstIndex - oldFirstIndex;
+        if (delta > 0) {
+          // We're loading more new messages at the top; we want to stay at the top
+          this.resizeAll();
+          this.setState({ oneTimeScrollRow: newRow });
+
+          return;
+        }
+      }
+
+      // We continue on after our atTop check; because if we're not loading new messages
+      //   we still have to check for all the other situations which might require a
+      //   resize.
+
+      const oldLastIndex = prevProps.items.length - 1;
+      const oldLastId = prevProps.items[oldLastIndex];
+
+      const newLastIndex = items.findIndex(item => item === oldLastId);
+      if (newLastIndex < 0) {
         this.resizeAll();
-        this.setState({ oneTimeScrollRow: newRow });
-      } else {
-        const oldLastIndex = prevProps.items.length - 1;
-        const oldLastId = prevProps.items[oldLastIndex];
 
-        const newIndex = items.findIndex(item => item === oldLastId);
-        if (newIndex < 0) {
-          this.resizeAll();
+        return;
+      }
 
-          return;
-        }
+      const indexDelta = newLastIndex - oldLastIndex;
 
-        const indexDelta = newIndex - oldLastIndex;
-
-        // If we've just added to the end of the list, then the index of the last id's
-        //   index won't have changed, and we can rely on List's detection that items is
-        //   different for the necessary re-render.
-        if (indexDelta !== 0) {
-          this.resizeAll();
-        }
+      // If we've just added to the end of the list, then the index of the last id's
+      //   index won't have changed, and we can rely on List's detection that items is
+      //   different for the necessary re-render.
+      if (indexDelta !== 0) {
+        this.resizeAll();
+      } else if (typingContact && prevProps.typingContact) {
+        // The last row will be off, because it was previously the typing indicator
+        this.resizeAll();
       }
     } else if (messageHeightChanges) {
       this.resizeAll();

ts/state/ducks/conversations.ts

@@ -857,6 +857,30 @@ export function reducer(
       totalUnread,
     } = existingConversation.metrics;
 
+    if (messages.length < 1) {
+      return state;
+    }
+
+    const lookup = fromPairs(
+      existingConversation.messageIds.map(id => [id, messagesLookup[id]])
+    );
+    messages.forEach(message => {
+      lookup[message.id] = message;
+    });
+
+    const sorted = orderBy(values(lookup), ['received_at'], ['ASC']);
+    const messageIds = sorted.map(message => message.id);
+
+    const first = sorted[0];
+    const last = sorted[sorted.length - 1];
+
+    if (!newest) {
+      newest = pick(first, ['id', 'received_at']);
+    }
+    if (!oldest) {
+      oldest = pick(last, ['id', 'received_at']);
+    }
+
     const existingTotal = existingConversation.messageIds.length;
     if (isNewMessage && existingTotal > 0) {
       const lastMessageId = existingConversation.messageIds[existingTotal - 1];
@@ -869,27 +893,6 @@ export function reducer(
       }
     }
 
-    const newIds = messages.map(message => message.id);
-    const newChanges = intersection(newIds, existingConversation.messageIds);
-    const heightChangeMessageIds = uniq([
-      ...newChanges,
-      ...existingConversation.heightChangeMessageIds,
-    ]);
-
-    const lookup = fromPairs(
-      existingConversation.messageIds.map(id => [id, messagesLookup[id]])
-    );
-
-    messages.forEach(message => {
-      lookup[message.id] = message;
-    });
-
-    const sorted = orderBy(values(lookup), ['received_at'], ['ASC']);
-    const messageIds = sorted.map(message => message.id);
-
-    const first = sorted[0];
-    const last = sorted.length > 0 ? sorted[sorted.length - 1] : null;
-
     if (first && oldest && first.received_at < oldest.received_at) {
       oldest = pick(first, ['id', 'received_at']);
     }
@@ -897,6 +900,7 @@ export function reducer(
       newest = pick(last, ['id', 'received_at']);
     }
 
+    const newIds = messages.map(message => message.id);
     const newMessageIds = difference(newIds, existingConversation.messageIds);
     const { isNearBottom } = existingConversation;
 
@@ -924,6 +928,12 @@ export function reducer(
       totalUnread = (totalUnread || 0) + newUnread;
     }
 
+    const changedIds = intersection(newIds, existingConversation.messageIds);
+    const heightChangeMessageIds = uniq([
+      ...changedIds,
+      ...existingConversation.heightChangeMessageIds,
+    ]);
+
     return {
       ...state,
       messagesLookup: {

ts/state/selectors/conversations.ts

@@ -1,4 +1,5 @@
 import memoizee from 'memoizee';
+import { isNumber } from 'lodash';
 import { createSelector } from 'reselect';
 import { format } from '../../types/PhoneNumber';
 
@@ -388,7 +389,7 @@ export function _conversationMessagesSelector(
     items,
     messageHeightChanges,
     oldestUnreadIndex:
-      oldestUnreadIndex && oldestUnreadIndex >= 0
+      isNumber(oldestUnreadIndex) && oldestUnreadIndex >= 0
         ? oldestUnreadIndex
         : undefined,
     resetCounter,