Custom typing notification and component

packages/jupyter-chat/src/components/chat.tsx

@@ -17,7 +17,7 @@ import {
   InputToolbarRegistry
 } from './input';
 import { JlThemeProvider } from './jl-theme-provider';
-import { ChatMessages } from './messages';
+import { ChatMessages, WriterComponent } from './messages';
 import { AttachmentOpenerContext } from '../context';
 import { IChatModel } from '../model';
 import {
@@ -42,6 +42,7 @@ export function ChatBody(props: Chat.IChatBodyProps): JSX.Element {
         inputToolbarRegistry={inputToolbarRegistry}
         messageFooterRegistry={props.messageFooterRegistry}
         welcomeMessage={props.welcomeMessage}
+        writerComponent={props.writerComponent}
       />
       <ChatInput
         sx={{
@@ -141,6 +142,10 @@ export namespace Chat {
      * The welcome message.
      */
     welcomeMessage?: string;
+    /**
+     * The typing notification widget.
+     */
+    writerComponent?: WriterComponent;
   }
 
   /**

packages/jupyter-chat/src/components/messages/messages.tsx

@@ -14,12 +14,12 @@ import { ChatMessageHeader } from './header';
 import { ChatMessage } from './message';
 import { Navigation } from './navigation';
 import { WelcomeMessage } from './welcome';
-import { WritingUsersList } from './writers';
+import { WriterComponent, WritingUsersList } from './writers';
 import { IInputToolbarRegistry } from '../input';
 import { ScrollContainer } from '../scroll-container';
 import { IChatCommandRegistry, IMessageFooterRegistry } from '../../registers';
 import { IChatModel } from '../../model';
-import { IChatMessage, IUser } from '../../types';
+import { IChatMessage } from '../../types';
 
 const MESSAGES_BOX_CLASS = 'jp-chat-messages-container';
 const MESSAGE_CLASS = 'jp-chat-message';
@@ -53,6 +53,10 @@ export type BaseMessageProps = {
    * The welcome message.
    */
   welcomeMessage?: string;
+  /**
+   * The typing notification widget.
+   */
+  writerComponent?: WriterComponent;
 };
 
 /**
@@ -62,7 +66,9 @@ export function ChatMessages(props: BaseMessageProps): JSX.Element {
   const { model } = props;
   const [messages, setMessages] = useState<IChatMessage[]>(model.messages);
   const refMsgBox = useRef<HTMLDivElement>(null);
-  const [currentWriters, setCurrentWriters] = useState<IUser[]>([]);
+  const [currentWriters, setCurrentWriters] = useState<IChatModel.IWriter[]>(
+    []
+  );
   const [allRendered, setAllRendered] = useState<boolean>(false);
 
   // The list of message DOM and their rendered promises.
@@ -96,7 +102,7 @@ export function ChatMessages(props: BaseMessageProps): JSX.Element {
     }
 
     function handleWritersChange(_: IChatModel, writers: IChatModel.IWriter[]) {
-      setCurrentWriters(writers.map(writer => writer.user));
+      setCurrentWriters([...writers]);
     }
 
     model.messagesUpdated.connect(handleChatEvents);
@@ -211,7 +217,10 @@ export function ChatMessages(props: BaseMessageProps): JSX.Element {
           })}
         </Box>
       </ScrollContainer>
-      <WritingUsersList writers={currentWriters}></WritingUsersList>
+      <WritingUsersList
+        writers={currentWriters}
+        writerComponent={props.writerComponent}
+      ></WritingUsersList>
       <Navigation {...props} refMsgBox={refMsgBox} allRendered={allRendered} />
     </>
   );

packages/jupyter-chat/src/components/messages/writers.tsx

@@ -7,9 +7,14 @@ import { Box, Typography } from '@mui/material';
 import React, { useMemo } from 'react';
 
 import { Avatar } from '../avatar';
+import { IChatModel } from '../../model';
+import { ISignal, Signal } from '@lumino/signaling';
 import { IUser } from '../../types';
 
 const WRITERS_CLASS = 'jp-chat-writers';
+const WRITERS_ROW_CLASS = 'jp-chat-writers-row';
+
+const DEFAULT_TEXT = 'is writing';
 
 /**
  * The writers component props.
@@ -18,7 +23,11 @@ type writersProps = {
   /**
    * The list of users currently writing.
    */
-  writers: IUser[];
+  writers: IChatModel.IWriter[];
+  /**
+   * The component to render next to the writers.
+   */
+  writerComponent?: WriterComponent;
 };
 
 /**
@@ -36,14 +45,53 @@ const TypingIndicator = (): JSX.Element => (
  * The writers component, displaying the current writers.
  */
 export function WritingUsersList(props: writersProps): JSX.Element | null {
+  const { writers, writerComponent } = props;
+
+  // Don't render if no writers
+  if (writers.length === 0) {
+    return null;
+  }
+
+  // Default rendering for users without custom typing indicator and if there is no
+  // component to add to the writing notification.
+  const defaultWriters = writerComponent?.component
+    ? []
+    : writers.filter(writer => !writer.typingIndicator);
+  const defaultWritersComponent = defaultWritingUsers({
+    writers: defaultWriters.map(writer => writer.user)
+  });
+
+  // Custom rendering for users with custom typing indicator or if there is a component
+  // to add to the writing notification.
+  const customWriters = writerComponent?.component
+    ? writers
+    : writers.filter(writer => writer.typingIndicator);
+  const customWritersComponent = customWritingUser({
+    writers: customWriters,
+    writerComponent: writerComponent?.component
+  });
+
+  return (
+    <Box className={WRITERS_CLASS}>
+      {defaultWritersComponent !== null && defaultWritersComponent}
+      {customWritersComponent !== null && customWritersComponent}
+    </Box>
+  );
+}
+
+/**
+ * The default rendering of writing users, all in a row.
+ * This renderer is used if there is no custom component and no custom typing indicator.
+ */
+function defaultWritingUsers(props: { writers: IUser[] }): JSX.Element | null {
   const { writers } = props;
 
   // Don't render if no writers
   if (writers.length === 0) {
     return null;
   }
 
-  const writersText = writers.length > 1 ? ' are writing' : ' is writing';
+  const writersText = writers.length > 1 ? 'are writing' : DEFAULT_TEXT;
 
   const writingUsers: JSX.Element[] = useMemo(
     () =>
@@ -66,16 +114,104 @@ export function WritingUsersList(props: writersProps): JSX.Element | null {
   );
 
   return (
-    <Box className={`${WRITERS_CLASS}`}>
+    <Box className={`${WRITERS_ROW_CLASS}`}>
       <Box className="jp-chat-writers-content">
         {writingUsers}
         <Box className="jp-chat-writing-status">
           <Typography variant="body2" className="jp-chat-writing-text">
-            {writersText}
+            {` ${writersText}`}
           </Typography>
           <TypingIndicator />
         </Box>
       </Box>
     </Box>
   );
 }
+
+/**
+ * The custom rendering of writing users, one per row.
+ * This renderer is used if there is a custom component or a custom typing indicator.
+ */
+function customWritingUser(props: {
+  writers: IChatModel.IWriter[];
+  writerComponent?: React.FC<WriterComponentProps>;
+}): JSX.Element | null {
+  const { writers } = props;
+
+  // Don't render if no writers
+  if (writers.length === 0) {
+    return null;
+  }
+
+  const writingUsers: JSX.Element[] = writers.map(writer => {
+    const username =
+      writer.user.display_name ??
+      writer.user.name ??
+      (writer.user.username || 'User undefined');
+
+    const writerText = writer.typingIndicator ?? DEFAULT_TEXT;
+    return (
+      <Box key={writer.user.username} className="jp-chat-writer-item">
+        <Avatar user={writer.user} small />
+        <Typography variant="body2" className="jp-chat-writer-name">
+          {username}
+        </Typography>
+        <Box className="jp-chat-writing-status">
+          <Typography variant="body2" className="jp-chat-writing-text">
+            {` ${writerText}`}
+          </Typography>
+          <TypingIndicator />
+        </Box>
+        {props.writerComponent && <props.writerComponent writer={writer} />}
+      </Box>
+    );
+  });
+
+  return (
+    <>
+      {writingUsers.map(writingUser => (
+        <Box className={`${WRITERS_ROW_CLASS}`}>{writingUser}</Box>
+      ))}
+    </>
+  );
+}
+
+export type WriterComponentProps = {
+  /**
+   * The writer associated to this component.
+   */
+  writer: IChatModel.IWriter;
+};
+
+/**
+ * The writer component class containing a react component to display with the user
+ * writing notification.
+ */
+export class WriterComponent {
+  /**
+   * The react component.
+   */
+  get component(): React.FC<WriterComponentProps> | undefined {
+    return this._component;
+  }
+  set component(value: React.FC<WriterComponentProps> | undefined) {
+    this._component = value;
+    this._changed.emit(this._component);
+  }
+
+  /**
+   * Emitting when the component changed.
+   */
+  get changed(): ISignal<
+    WriterComponent,
+    React.FC<WriterComponentProps> | undefined
+  > {
+    return this._changed;
+  }
+
+  private _component: React.FC<WriterComponentProps> | undefined;
+  private _changed = new Signal<
+    WriterComponent,
+    React.FC<WriterComponentProps> | undefined
+  >(this);
+}

packages/jupyter-chat/src/model.ts

@@ -791,9 +791,13 @@ export namespace IChatModel {
      */
     user: IUser;
     /**
-     * The message ID (optional)
+     * The message ID (optional).
      */
     messageID?: string;
+    /**
+     * The writer typing indicator (optional)
+     */
+    typingIndicator?: string;
   }
 }
 

packages/jupyter-chat/src/widgets/multichat-panel.tsx

@@ -30,7 +30,8 @@ import { ChatWidget } from './chat-widget';
 import {
   Chat,
   IInputToolbarRegistry,
-  IInputToolbarRegistryFactory
+  IInputToolbarRegistryFactory,
+  WriterComponent
 } from '../components';
 import { chatIcon, readIcon } from '../icons';
 import { IChatModel } from '../model';
@@ -65,6 +66,7 @@ export class MultiChatPanel extends SidePanel {
     this._inputToolbarFactory = options.inputToolbarFactory;
     this._messageFooterRegistry = options.messageFooterRegistry;
     this._welcomeMessage = options.welcomeMessage;
+    this._writerComponent = options.writerComponent;
 
     this._getChatNames = options.getChatNames;
     this._createModel = options.createModel;
@@ -155,7 +157,8 @@ export class MultiChatPanel extends SidePanel {
       attachmentOpenerRegistry: this._attachmentOpenerRegistry,
       inputToolbarRegistry,
       messageFooterRegistry: this._messageFooterRegistry,
-      welcomeMessage: this._welcomeMessage
+      welcomeMessage: this._welcomeMessage,
+      writerComponent: this._writerComponent
     });
 
     const section = new ChatSection({
@@ -273,6 +276,7 @@ export class MultiChatPanel extends SidePanel {
   private _inputToolbarFactory?: IInputToolbarRegistryFactory;
   private _messageFooterRegistry?: IMessageFooterRegistry;
   private _welcomeMessage?: string;
+  private _writerComponent?: WriterComponent;
   private _updateChatListDebouncer: Debouncer;
 
   private _createModel?: (

packages/jupyter-chat/style/chat.css

@@ -74,7 +74,12 @@
   margin-top: 0;
 }
 
-.jp-chat-writers {
+.jp-chat-writer {
+  display: flex;
+  flex-direction: column;
+}
+
+.jp-chat-writers-row {
   display: flex;
   flex-wrap: wrap;
   position: sticky;
@@ -160,7 +165,7 @@
   }
 }
 
-.jp-chat-writers > div {
+.jp-chat-writers-row > div {
   display: flex;
   align-items: center;
   gap: 0.2em;