Merge branch 'lexical' into 'main'

Lexical text editor

See merge request soapbox-pub/soapbox!2177

.eslintrc.cjs

@@ -20,8 +20,8 @@ module.exports = {
   },
 
   plugins: [
-    'react',
     'jsdoc',
+    'react',
     'jsx-a11y',
     'import',
     'promise',

package.json

@@ -50,6 +50,17 @@
     "@fontsource/inter": "^5.0.0",
     "@fontsource/roboto-mono": "^5.0.0",
     "@gamestdio/websocket": "^0.3.2",
+    "@lexical/clipboard": "^0.11.3",
+    "@lexical/code": "^0.11.3",
+    "@lexical/hashtag": "^0.11.3",
+    "@lexical/html": "^0.11.3",
+    "@lexical/link": "^0.11.3",
+    "@lexical/list": "^0.11.3",
+    "@lexical/react": "^0.11.3",
+    "@lexical/rich-text": "^0.11.3",
+    "@lexical/selection": "^0.11.3",
+    "@lexical/table": "^0.11.3",
+    "@lexical/utils": "^0.11.3",
     "@popperjs/core": "^2.11.5",
     "@reach/combobox": "^0.18.0",
     "@reach/menu-button": "^0.18.0",
@@ -112,6 +123,7 @@
     "intl-messageformat-parser": "^6.0.0",
     "intl-pluralrules": "^2.0.0",
     "leaflet": "^1.8.0",
+    "lexical": "^0.11.3",
     "line-awesome": "^1.3.0",
     "localforage": "^1.10.0",
     "lodash": "^4.7.11",

src/actions/__tests__/me.test.ts

@@ -66,7 +66,7 @@ describe('fetchMe()', () => {
       });
 
       it('dispatches the correct actions', async() => {
-        const expectedActions =  [
+        const expectedActions = [
           { type: 'ME_FETCH_REQUEST' },
           { type: 'AUTH_ACCOUNT_REMEMBER_REQUEST', accountUrl },
           { type: 'ACCOUNTS_IMPORT', accounts: [] },
@@ -102,7 +102,7 @@ describe('patchMe()', () => {
     });
 
     it('dispatches the correct actions', async() => {
-      const expectedActions =  [
+      const expectedActions = [
         { type: 'ME_PATCH_REQUEST' },
         { type: 'ACCOUNTS_IMPORT', accounts: [] },
         {

src/actions/__tests__/notifications.test.ts

@@ -21,7 +21,7 @@ describe('markReadNotifications()', () => {
 
     const store = mockStore(state);
 
-    const expectedActions =  [{
+    const expectedActions = [{
       type: 'MARKER_SAVE_REQUEST',
       marker: {
         notifications: {

src/actions/compose.ts

@@ -6,21 +6,21 @@ import { defineMessages, IntlShape } from 'react-intl';
 import api from 'soapbox/api';
 import { isNativeEmoji } from 'soapbox/features/emoji';
 import emojiSearch from 'soapbox/features/emoji/search';
+import { normalizeTag } from 'soapbox/normalizers';
 import { selectAccount, selectOwnAccount } from 'soapbox/selectors';
 import { tagHistory } from 'soapbox/settings';
 import toast from 'soapbox/toast';
 import { isLoggedIn } from 'soapbox/utils/auth';
 import { getFeatures, parseVersion } from 'soapbox/utils/features';
-import { formatBytes, getVideoDuration } from 'soapbox/utils/media';
-import resizeImage from 'soapbox/utils/resize-image';
 
 import { useEmoji } from './emojis';
 import { importFetchedAccounts } from './importer';
-import { uploadMedia, fetchMedia, updateMedia } from './media';
+import { uploadFile, updateMedia } from './media';
 import { openModal, closeModal } from './modals';
 import { getSettings } from './settings';
 import { createStatus } from './statuses';
 
+import type { EditorState } from 'lexical';
 import type { AutoSuggestion } from 'soapbox/components/autosuggest-input';
 import type { Emoji } from 'soapbox/features/emoji';
 import type { Account, Group } from 'soapbox/schemas';
@@ -30,7 +30,7 @@ import type { History } from 'soapbox/types/history';
 
 const { CancelToken, isCancel } = axios;
 
-let cancelFetchComposeSuggestionsAccounts: Canceler;
+let cancelFetchComposeSuggestions: Canceler;
 
 const COMPOSE_CHANGE          = 'COMPOSE_CHANGE' as const;
 const COMPOSE_SUBMIT_REQUEST  = 'COMPOSE_SUBMIT_REQUEST' as const;
@@ -87,10 +87,9 @@ const COMPOSE_REMOVE_FROM_MENTIONS = 'COMPOSE_REMOVE_FROM_MENTIONS' as const;
 
 const COMPOSE_SET_STATUS = 'COMPOSE_SET_STATUS' as const;
 
+const COMPOSE_EDITOR_STATE_SET = 'COMPOSE_EDITOR_STATE_SET' as const;
+
 const messages = defineMessages({
-  exceededImageSizeLimit: { id: 'upload_error.image_size_limit', defaultMessage: 'Image exceeds the current file size limit ({limit})' },
-  exceededVideoSizeLimit: { id: 'upload_error.video_size_limit', defaultMessage: 'Video exceeds the current file size limit ({limit})' },
-  exceededVideoDurationLimit: { id: 'upload_error.video_duration_limit', defaultMessage: 'Video exceeds the current duration limit ({limit, plural, one {# second} other {# seconds}})' },
   scheduleError: { id: 'compose.invalid_schedule', defaultMessage: 'You must schedule a post at least 5 minutes out.' },
   success: { id: 'compose.submit_success', defaultMessage: 'Your post was sent' },
   editSuccess: { id: 'compose.edit_success', defaultMessage: 'Your post was edited' },
@@ -304,6 +303,7 @@ const submitCompose = (composeId: string, routerHistory?: History, force = false
   (dispatch: AppDispatch, getState: () => RootState) => {
     if (!isLoggedIn(getState)) return;
     const state = getState();
+    const { richText } = getFeatures(state.instance);
 
     const compose = state.compose.get(composeId)!;
 
@@ -312,6 +312,8 @@ const submitCompose = (composeId: string, routerHistory?: History, force = false
     const statusId = compose.id;
     let to         = compose.to;
 
+    const contentType = richText ? 'text/markdown' : 'text/plain';
+
     if (!validateSchedule(state, composeId)) {
       toast.error(messages.scheduleError);
       return;
@@ -350,7 +352,7 @@ const submitCompose = (composeId: string, routerHistory?: History, force = false
       sensitive: compose.sensitive,
       spoiler_text: compose.spoiler_text,
       visibility: compose.privacy,
-      content_type: compose.content_type,
+      content_type: contentType,
       poll: compose.poll,
       scheduled_at: compose.schedule,
       to,
@@ -392,9 +394,6 @@ const uploadCompose = (composeId: string, files: FileList, intl: IntlShape) =>
   (dispatch: AppDispatch, getState: () => RootState) => {
     if (!isLoggedIn(getState)) return;
     const attachmentLimit = getState().instance.configuration.getIn(['statuses', 'max_media_attachments']) as number;
-    const maxImageSize = getState().instance.configuration.getIn(['media_attachments', 'image_size_limit']) as number | undefined;
-    const maxVideoSize = getState().instance.configuration.getIn(['media_attachments', 'video_size_limit']) as number | undefined;
-    const maxVideoDuration = getState().instance.configuration.getIn(['media_attachments', 'video_duration_limit']) as number | undefined;
 
     const media  = getState().compose.get(composeId)?.media_attachments;
     const progress = new Array(files.length).fill(0);
@@ -412,67 +411,49 @@ const uploadCompose = (composeId: string, files: FileList, intl: IntlShape) =>
     Array.from(files).forEach(async(f, i) => {
       if (mediaCount + i > attachmentLimit - 1) return;
 
-      const isImage = f.type.match(/image.*/);
+      dispatch(uploadFile(
-      const isVideo = f.type.match(/video.*/);
+        f,
-      const videoDurationInSeconds = (isVideo && maxVideoDuration) ? await getVideoDuration(f) : 0;
+        intl,
-
+        (data) => dispatch(uploadComposeSuccess(composeId, data, f)),
-      if (isImage && maxImageSize && (f.size > maxImageSize)) {
+        (error) => dispatch(uploadComposeFail(composeId, error)),
-        const limit = formatBytes(maxImageSize);
+        ({ loaded }: any) => {
-        const message = intl.formatMessage(messages.exceededImageSizeLimit, { limit });
-        toast.error(message);
-        dispatch(uploadComposeFail(composeId, true));
-        return;
-      } else if (isVideo && maxVideoSize && (f.size > maxVideoSize)) {
-        const limit = formatBytes(maxVideoSize);
-        const message = intl.formatMessage(messages.exceededVideoSizeLimit, { limit });
-        toast.error(message);
-        dispatch(uploadComposeFail(composeId, true));
-        return;
-      } else if (isVideo && maxVideoDuration && (videoDurationInSeconds > maxVideoDuration)) {
-        const message = intl.formatMessage(messages.exceededVideoDurationLimit, { limit: maxVideoDuration });
-        toast.error(message);
-        dispatch(uploadComposeFail(composeId, true));
-        return;
-      }
-
-      // FIXME: Don't define const in loop
-      /* eslint-disable no-loop-func */
-      resizeImage(f).then(file => {
-        const data = new FormData();
-        data.append('file', file);
-        // Account for disparity in size of original image and resized data
-        total += file.size - f.size;
-
-        const onUploadProgress = ({ loaded }: any) => {
           progress[i] = loaded;
           dispatch(uploadComposeProgress(composeId, progress.reduce((a, v) => a + v, 0), total));
-        };
+        },
+        (value) => total += value,
+      ));
 
-        return dispatch(uploadMedia(data, onUploadProgress))
-          .then(({ status, data }) => {
-            // If server-side processing of the media attachment has not completed yet,
-            // poll the server until it is, before showing the media attachment as uploaded
-            if (status === 200) {
-              dispatch(uploadComposeSuccess(composeId, data, f));
-            } else if (status === 202) {
-              const poll = () => {
-                dispatch(fetchMedia(data.id)).then(({ status, data }) => {
-                  if (status === 200) {
-                    dispatch(uploadComposeSuccess(composeId, data, f));
-                  } else if (status === 206) {
-                    setTimeout(() => poll(), 1000);
-                  }
-                }).catch(error => dispatch(uploadComposeFail(composeId, error)));
-              };
-
-              poll();
-            }
-          });
-      }).catch(error => dispatch(uploadComposeFail(composeId, error)));
-      /* eslint-enable no-loop-func */
     });
   };
 
+const uploadComposeRequest = (composeId: string) => ({
+  type: COMPOSE_UPLOAD_REQUEST,
+  id: composeId,
+  skipLoading: true,
+});
+
+const uploadComposeProgress = (composeId: string, loaded: number, total: number) => ({
+  type: COMPOSE_UPLOAD_PROGRESS,
+  id: composeId,
+  loaded: loaded,
+  total: total,
+});
+
+const uploadComposeSuccess = (composeId: string, media: APIEntity, file: File) => ({
+  type: COMPOSE_UPLOAD_SUCCESS,
+  id: composeId,
+  media: media,
+  file,
+  skipLoading: true,
+});
+
+const uploadComposeFail = (composeId: string, error: AxiosError | true) => ({
+  type: COMPOSE_UPLOAD_FAIL,
+  id: composeId,
+  error: error,
+  skipLoading: true,
+});
+
 const changeUploadCompose = (composeId: string, id: string, params: Record<string, any>) =>
   (dispatch: AppDispatch, getState: () => RootState) => {
     if (!isLoggedIn(getState)) return;
@@ -507,34 +488,6 @@ const changeUploadComposeFail = (composeId: string, id: string, error: AxiosErro
   skipLoading: true,
 });
 
-const uploadComposeRequest = (composeId: string) => ({
-  type: COMPOSE_UPLOAD_REQUEST,
-  id: composeId,
-  skipLoading: true,
-});
-
-const uploadComposeProgress = (composeId: string, loaded: number, total: number) => ({
-  type: COMPOSE_UPLOAD_PROGRESS,
-  id: composeId,
-  loaded: loaded,
-  total: total,
-});
-
-const uploadComposeSuccess = (composeId: string, media: APIEntity, file: File) => ({
-  type: COMPOSE_UPLOAD_SUCCESS,
-  id: composeId,
-  media: media,
-  file,
-  skipLoading: true,
-});
-
-const uploadComposeFail = (composeId: string, error: AxiosError | true) => ({
-  type: COMPOSE_UPLOAD_FAIL,
-  id: composeId,
-  error: error,
-  skipLoading: true,
-});
-
 const undoUploadCompose = (composeId: string, media_id: string) => ({
   type: COMPOSE_UPLOAD_UNDO,
   id: composeId,
@@ -554,8 +507,8 @@ const setGroupTimelineVisible = (composeId: string, groupTimelineVisible: boolea
 });
 
 const clearComposeSuggestions = (composeId: string) => {
-  if (cancelFetchComposeSuggestionsAccounts) {
+  if (cancelFetchComposeSuggestions) {
-    cancelFetchComposeSuggestionsAccounts();
+    cancelFetchComposeSuggestions();
   }
   return {
     type: COMPOSE_SUGGESTIONS_CLEAR,
@@ -564,12 +517,12 @@ const clearComposeSuggestions = (composeId: string) => {
 };
 
 const fetchComposeSuggestionsAccounts = throttle((dispatch, getState, composeId, token) => {
-  if (cancelFetchComposeSuggestionsAccounts) {
+  if (cancelFetchComposeSuggestions) {
-    cancelFetchComposeSuggestionsAccounts(composeId);
+    cancelFetchComposeSuggestions(composeId);
   }
   api(getState).get('/api/v1/accounts/search', {
     cancelToken: new CancelToken(cancel => {
-      cancelFetchComposeSuggestionsAccounts = cancel;
+      cancelFetchComposeSuggestions = cancel;
     }),
     params: {
       q: token.slice(1),
@@ -594,10 +547,37 @@ const fetchComposeSuggestionsEmojis = (dispatch: AppDispatch, getState: () => Ro
 };
 
 const fetchComposeSuggestionsTags = (dispatch: AppDispatch, getState: () => RootState, composeId: string, token: string) => {
-  const state = getState();
+  if (cancelFetchComposeSuggestions) {
-  const currentTrends = state.trends.items;
+    cancelFetchComposeSuggestions(composeId);
+  }
 
-  dispatch(updateSuggestionTags(composeId, token, currentTrends));
+  const state = getState();
+
+  const instance = state.instance;
+  const { trends } = getFeatures(instance);
+
+  if (trends) {
+    const currentTrends = state.trends.items;
+
+    return dispatch(updateSuggestionTags(composeId, token, currentTrends));
+  }
+
+  api(getState).get('/api/v2/search', {
+    cancelToken: new CancelToken(cancel => {
+      cancelFetchComposeSuggestions = cancel;
+    }),
+    params: {
+      q: token.slice(1),
+      limit: 4,
+      type: 'hashtags',
+    },
+  }).then(response => {
+    dispatch(updateSuggestionTags(composeId, token, response.data?.hashtags.map(normalizeTag)));
+  }).catch(error => {
+    if (!isCancel(error)) {
+      toast.showAlertForError(error);
+    }
+  });
 };
 
 const fetchComposeSuggestions = (composeId: string, token: string) =>
@@ -675,11 +655,11 @@ const selectComposeSuggestion = (composeId: string, position: number, token: str
     dispatch(action);
   };
 
-const updateSuggestionTags = (composeId: string, token: string, currentTrends: ImmutableList<Tag>) => ({
+const updateSuggestionTags = (composeId: string, token: string, tags: ImmutableList<Tag>) => ({
   type: COMPOSE_SUGGESTION_TAGS_UPDATE,
   id: composeId,
   token,
-  currentTrends,
+  tags,
 });
 
 const updateTagHistory = (composeId: string, tags: string[]) => ({
@@ -861,6 +841,12 @@ const eventDiscussionCompose = (composeId: string, status: Status) =>
     });
   };
 
+const setEditorState = (composeId: string, editorState: EditorState | string | null) => ({
+  type: COMPOSE_EDITOR_STATE_SET,
+  id: composeId,
+  editorState: editorState,
+});
+
 type ComposeAction =
   ComposeSetStatusAction
   | ReturnType<typeof changeCompose>
@@ -906,6 +892,7 @@ type ComposeAction =
   | ComposeAddToMentionsAction
   | ComposeRemoveFromMentionsAction
   | ComposeEventReplyAction
+  | ReturnType<typeof setEditorState>
 
 export {
   COMPOSE_CHANGE,
@@ -952,6 +939,7 @@ export {
   COMPOSE_ADD_TO_MENTIONS,
   COMPOSE_REMOVE_FROM_MENTIONS,
   COMPOSE_SET_STATUS,
+  COMPOSE_EDITOR_STATE_SET,
   COMPOSE_SET_GROUP_TIMELINE_VISIBLE,
   setComposeToStatus,
   changeCompose,
@@ -968,6 +956,7 @@ export {
   submitComposeRequest,
   submitComposeSuccess,
   submitComposeFail,
+  uploadFile,
   uploadCompose,
   changeUploadCompose,
   changeUploadComposeRequest,
@@ -1006,5 +995,6 @@ export {
   addToMentions,
   removeFromMentions,
   eventDiscussionCompose,
+  setEditorState,
   type ComposeAction,
 };

src/actions/domain-blocks.ts

@@ -162,7 +162,7 @@ const expandDomainBlocksSuccess = (domains: string[], next: string | null) => ({
   next,
 });
 
-const expandDomainBlocksFail = (error: AxiosError)  => ({
+const expandDomainBlocksFail = (error: AxiosError) => ({
   type: DOMAIN_BLOCKS_EXPAND_FAIL,
   error,
 });

src/actions/events.ts

@@ -2,11 +2,9 @@ import { defineMessages, IntlShape } from 'react-intl';
 
 import api, { getLinks } from 'soapbox/api';
 import toast from 'soapbox/toast';
-import { formatBytes } from 'soapbox/utils/media';
-import resizeImage from 'soapbox/utils/resize-image';
 
 import { importFetchedAccounts, importFetchedStatus, importFetchedStatuses } from './importer';
-import { fetchMedia, uploadMedia } from './media';
+import { uploadFile } from './media';
 import { closeModal, openModal } from './modals';
 import {
   STATUS_FETCH_SOURCE_FAIL,
@@ -15,73 +13,74 @@ import {
 } from './statuses';
 
 import type { AxiosError } from 'axios';
+import type { ReducerStatus } from 'soapbox/reducers/statuses';
 import type { AppDispatch, RootState } from 'soapbox/store';
 import type { APIEntity, Status as StatusEntity } from 'soapbox/types/entities';
 
-const LOCATION_SEARCH_REQUEST = 'LOCATION_SEARCH_REQUEST';
+const LOCATION_SEARCH_REQUEST = 'LOCATION_SEARCH_REQUEST' as const;
-const LOCATION_SEARCH_SUCCESS = 'LOCATION_SEARCH_SUCCESS';
+const LOCATION_SEARCH_SUCCESS = 'LOCATION_SEARCH_SUCCESS' as const;
-const LOCATION_SEARCH_FAIL    = 'LOCATION_SEARCH_FAIL';
+const LOCATION_SEARCH_FAIL    = 'LOCATION_SEARCH_FAIL' as const;
 
-const EDIT_EVENT_NAME_CHANGE              = 'EDIT_EVENT_NAME_CHANGE';
+const EDIT_EVENT_NAME_CHANGE              = 'EDIT_EVENT_NAME_CHANGE' as const;
-const EDIT_EVENT_DESCRIPTION_CHANGE       = 'EDIT_EVENT_DESCRIPTION_CHANGE';
+const EDIT_EVENT_DESCRIPTION_CHANGE       = 'EDIT_EVENT_DESCRIPTION_CHANGE' as const;
-const EDIT_EVENT_START_TIME_CHANGE        = 'EDIT_EVENT_START_TIME_CHANGE';
+const EDIT_EVENT_START_TIME_CHANGE        = 'EDIT_EVENT_START_TIME_CHANGE' as const;
-const EDIT_EVENT_HAS_END_TIME_CHANGE      = 'EDIT_EVENT_HAS_END_TIME_CHANGE';
+const EDIT_EVENT_HAS_END_TIME_CHANGE      = 'EDIT_EVENT_HAS_END_TIME_CHANGE' as const;
-const EDIT_EVENT_END_TIME_CHANGE          = 'EDIT_EVENT_END_TIME_CHANGE';
+const EDIT_EVENT_END_TIME_CHANGE          = 'EDIT_EVENT_END_TIME_CHANGE' as const;
-const EDIT_EVENT_APPROVAL_REQUIRED_CHANGE = 'EDIT_EVENT_APPROVAL_REQUIRED_CHANGE';
+const EDIT_EVENT_APPROVAL_REQUIRED_CHANGE = 'EDIT_EVENT_APPROVAL_REQUIRED_CHANGE' as const;
-const EDIT_EVENT_LOCATION_CHANGE          = 'EDIT_EVENT_LOCATION_CHANGE';
+const EDIT_EVENT_LOCATION_CHANGE          = 'EDIT_EVENT_LOCATION_CHANGE' as const;
 
-const EVENT_BANNER_UPLOAD_REQUEST  = 'EVENT_BANNER_UPLOAD_REQUEST';
+const EVENT_BANNER_UPLOAD_REQUEST  = 'EVENT_BANNER_UPLOAD_REQUEST' as const;
-const EVENT_BANNER_UPLOAD_PROGRESS = 'EVENT_BANNER_UPLOAD_PROGRESS';
+const EVENT_BANNER_UPLOAD_PROGRESS = 'EVENT_BANNER_UPLOAD_PROGRESS' as const;
-const EVENT_BANNER_UPLOAD_SUCCESS  = 'EVENT_BANNER_UPLOAD_SUCCESS';
+const EVENT_BANNER_UPLOAD_SUCCESS  = 'EVENT_BANNER_UPLOAD_SUCCESS' as const;
-const EVENT_BANNER_UPLOAD_FAIL     = 'EVENT_BANNER_UPLOAD_FAIL';
+const EVENT_BANNER_UPLOAD_FAIL     = 'EVENT_BANNER_UPLOAD_FAIL' as const;
-const EVENT_BANNER_UPLOAD_UNDO     = 'EVENT_BANNER_UPLOAD_UNDO';
+const EVENT_BANNER_UPLOAD_UNDO     = 'EVENT_BANNER_UPLOAD_UNDO' as const;
 
-const EVENT_SUBMIT_REQUEST = 'EVENT_SUBMIT_REQUEST';
+const EVENT_SUBMIT_REQUEST = 'EVENT_SUBMIT_REQUEST' as const;
-const EVENT_SUBMIT_SUCCESS = 'EVENT_SUBMIT_SUCCESS';
+const EVENT_SUBMIT_SUCCESS = 'EVENT_SUBMIT_SUCCESS' as const;
-const EVENT_SUBMIT_FAIL    = 'EVENT_SUBMIT_FAIL';
+const EVENT_SUBMIT_FAIL    = 'EVENT_SUBMIT_FAIL' as const;
 
-const EVENT_JOIN_REQUEST = 'EVENT_JOIN_REQUEST';
+const EVENT_JOIN_REQUEST = 'EVENT_JOIN_REQUEST' as const;
-const EVENT_JOIN_SUCCESS = 'EVENT_JOIN_SUCCESS';
+const EVENT_JOIN_SUCCESS = 'EVENT_JOIN_SUCCESS' as const;
-const EVENT_JOIN_FAIL    = 'EVENT_JOIN_FAIL';
+const EVENT_JOIN_FAIL    = 'EVENT_JOIN_FAIL' as const;
 
-const EVENT_LEAVE_REQUEST = 'EVENT_LEAVE_REQUEST';
+const EVENT_LEAVE_REQUEST = 'EVENT_LEAVE_REQUEST' as const;
-const EVENT_LEAVE_SUCCESS = 'EVENT_LEAVE_SUCCESS';
+const EVENT_LEAVE_SUCCESS = 'EVENT_LEAVE_SUCCESS' as const;
-const EVENT_LEAVE_FAIL    = 'EVENT_LEAVE_FAIL';
+const EVENT_LEAVE_FAIL    = 'EVENT_LEAVE_FAIL' as const;
 
-const EVENT_PARTICIPATIONS_FETCH_REQUEST = 'EVENT_PARTICIPATIONS_FETCH_REQUEST';
+const EVENT_PARTICIPATIONS_FETCH_REQUEST = 'EVENT_PARTICIPATIONS_FETCH_REQUEST' as const;
-const EVENT_PARTICIPATIONS_FETCH_SUCCESS = 'EVENT_PARTICIPATIONS_FETCH_SUCCESS';
+const EVENT_PARTICIPATIONS_FETCH_SUCCESS = 'EVENT_PARTICIPATIONS_FETCH_SUCCESS' as const;
-const EVENT_PARTICIPATIONS_FETCH_FAIL    = 'EVENT_PARTICIPATIONS_FETCH_FAIL';
+const EVENT_PARTICIPATIONS_FETCH_FAIL    = 'EVENT_PARTICIPATIONS_FETCH_FAIL' as const;
 
-const EVENT_PARTICIPATIONS_EXPAND_REQUEST = 'EVENT_PARTICIPATIONS_EXPAND_REQUEST';
+const EVENT_PARTICIPATIONS_EXPAND_REQUEST = 'EVENT_PARTICIPATIONS_EXPAND_REQUEST' as const;
-const EVENT_PARTICIPATIONS_EXPAND_SUCCESS = 'EVENT_PARTICIPATIONS_EXPAND_SUCCESS';
+const EVENT_PARTICIPATIONS_EXPAND_SUCCESS = 'EVENT_PARTICIPATIONS_EXPAND_SUCCESS' as const;
-const EVENT_PARTICIPATIONS_EXPAND_FAIL    = 'EVENT_PARTICIPATIONS_EXPAND_FAIL';
+const EVENT_PARTICIPATIONS_EXPAND_FAIL    = 'EVENT_PARTICIPATIONS_EXPAND_FAIL' as const;
 
-const EVENT_PARTICIPATION_REQUESTS_FETCH_REQUEST = 'EVENT_PARTICIPATION_REQUESTS_FETCH_REQUEST';
+const EVENT_PARTICIPATION_REQUESTS_FETCH_REQUEST = 'EVENT_PARTICIPATION_REQUESTS_FETCH_REQUEST' as const;
-const EVENT_PARTICIPATION_REQUESTS_FETCH_SUCCESS = 'EVENT_PARTICIPATION_REQUESTS_FETCH_SUCCESS';
+const EVENT_PARTICIPATION_REQUESTS_FETCH_SUCCESS = 'EVENT_PARTICIPATION_REQUESTS_FETCH_SUCCESS' as const;
-const EVENT_PARTICIPATION_REQUESTS_FETCH_FAIL    = 'EVENT_PARTICIPATION_REQUESTS_FETCH_FAIL';
+const EVENT_PARTICIPATION_REQUESTS_FETCH_FAIL    = 'EVENT_PARTICIPATION_REQUESTS_FETCH_FAIL' as const;
 
-const EVENT_PARTICIPATION_REQUESTS_EXPAND_REQUEST = 'EVENT_PARTICIPATION_REQUESTS_EXPAND_REQUEST';
+const EVENT_PARTICIPATION_REQUESTS_EXPAND_REQUEST = 'EVENT_PARTICIPATION_REQUESTS_EXPAND_REQUEST' as const;
-const EVENT_PARTICIPATION_REQUESTS_EXPAND_SUCCESS = 'EVENT_PARTICIPATION_REQUESTS_EXPAND_SUCCESS';
+const EVENT_PARTICIPATION_REQUESTS_EXPAND_SUCCESS = 'EVENT_PARTICIPATION_REQUESTS_EXPAND_SUCCESS' as const;
-const EVENT_PARTICIPATION_REQUESTS_EXPAND_FAIL    = 'EVENT_PARTICIPATION_REQUESTS_EXPAND_FAIL';
+const EVENT_PARTICIPATION_REQUESTS_EXPAND_FAIL    = 'EVENT_PARTICIPATION_REQUESTS_EXPAND_FAIL' as const;
 
-const EVENT_PARTICIPATION_REQUEST_AUTHORIZE_REQUEST = 'EVENT_PARTICIPATION_REQUEST_AUTHORIZE_REQUEST';
+const EVENT_PARTICIPATION_REQUEST_AUTHORIZE_REQUEST = 'EVENT_PARTICIPATION_REQUEST_AUTHORIZE_REQUEST' as const;
-const EVENT_PARTICIPATION_REQUEST_AUTHORIZE_SUCCESS = 'EVENT_PARTICIPATION_REQUEST_AUTHORIZE_SUCCESS';
+const EVENT_PARTICIPATION_REQUEST_AUTHORIZE_SUCCESS = 'EVENT_PARTICIPATION_REQUEST_AUTHORIZE_SUCCESS' as const;
-const EVENT_PARTICIPATION_REQUEST_AUTHORIZE_FAIL    = 'EVENT_PARTICIPATION_REQUEST_AUTHORIZE_FAIL';
+const EVENT_PARTICIPATION_REQUEST_AUTHORIZE_FAIL    = 'EVENT_PARTICIPATION_REQUEST_AUTHORIZE_FAIL' as const;
 
-const EVENT_PARTICIPATION_REQUEST_REJECT_REQUEST = 'EVENT_PARTICIPATION_REQUEST_REJECT_REQUEST';
+const EVENT_PARTICIPATION_REQUEST_REJECT_REQUEST = 'EVENT_PARTICIPATION_REQUEST_REJECT_REQUEST' as const;
-const EVENT_PARTICIPATION_REQUEST_REJECT_SUCCESS = 'EVENT_PARTICIPATION_REQUEST_REJECT_SUCCESS';
+const EVENT_PARTICIPATION_REQUEST_REJECT_SUCCESS = 'EVENT_PARTICIPATION_REQUEST_REJECT_SUCCESS' as const;
-const EVENT_PARTICIPATION_REQUEST_REJECT_FAIL    = 'EVENT_PARTICIPATION_REQUEST_REJECT_FAIL';
+const EVENT_PARTICIPATION_REQUEST_REJECT_FAIL    = 'EVENT_PARTICIPATION_REQUEST_REJECT_FAIL' as const;
 
-const EVENT_COMPOSE_CANCEL = 'EVENT_COMPOSE_CANCEL';
+const EVENT_COMPOSE_CANCEL = 'EVENT_COMPOSE_CANCEL' as const;
 
-const EVENT_FORM_SET = 'EVENT_FORM_SET';
+const EVENT_FORM_SET = 'EVENT_FORM_SET' as const;
 
-const RECENT_EVENTS_FETCH_REQUEST = 'RECENT_EVENTS_FETCH_REQUEST';
+const RECENT_EVENTS_FETCH_REQUEST = 'RECENT_EVENTS_FETCH_REQUEST' as const;
-const RECENT_EVENTS_FETCH_SUCCESS = 'RECENT_EVENTS_FETCH_SUCCESS';
+const RECENT_EVENTS_FETCH_SUCCESS = 'RECENT_EVENTS_FETCH_SUCCESS' as const;
-const RECENT_EVENTS_FETCH_FAIL = 'RECENT_EVENTS_FETCH_FAIL';
+const RECENT_EVENTS_FETCH_FAIL = 'RECENT_EVENTS_FETCH_FAIL' as const;
-const JOINED_EVENTS_FETCH_REQUEST = 'JOINED_EVENTS_FETCH_REQUEST';
+const JOINED_EVENTS_FETCH_REQUEST = 'JOINED_EVENTS_FETCH_REQUEST' as const;
-const JOINED_EVENTS_FETCH_SUCCESS = 'JOINED_EVENTS_FETCH_SUCCESS';
+const JOINED_EVENTS_FETCH_SUCCESS = 'JOINED_EVENTS_FETCH_SUCCESS' as const;
-const JOINED_EVENTS_FETCH_FAIL = 'JOINED_EVENTS_FETCH_FAIL';
+const JOINED_EVENTS_FETCH_FAIL = 'JOINED_EVENTS_FETCH_FAIL' as const;
 
 const noOp = () => new Promise(f => f(undefined));
 
@@ -153,52 +152,21 @@ const changeEditEventLocation = (value: string | null) =>
   };
 
 const uploadEventBanner = (file: File, intl: IntlShape) =>
-  (dispatch: AppDispatch, getState: () => RootState) => {
+  (dispatch: AppDispatch) => {
-    const maxImageSize = getState().instance.configuration.getIn(['media_attachments', 'image_size_limit']) as number | undefined;
-
     let progress = 0;
 
     dispatch(uploadEventBannerRequest());
 
-    if (maxImageSize && (file.size > maxImageSize)) {
+    dispatch(uploadFile(
-      const limit = formatBytes(maxImageSize);
+      file,
-      const message = intl.formatMessage(messages.exceededImageSizeLimit, { limit });
+      intl,
-      toast.error(message);
+      (data) => dispatch(uploadEventBannerSuccess(data, file)),
-      dispatch(uploadEventBannerFail(true));
+      (error) => dispatch(uploadEventBannerFail(error)),
-      return;
+      ({ loaded }: any) => {
-    }
-
-    resizeImage(file).then(file => {
-      const data = new FormData();
-      data.append('file', file);
-      // Account for disparity in size of original image and resized data
-
-      const onUploadProgress = ({ loaded }: any) => {
         progress = loaded;
         dispatch(uploadEventBannerProgress(progress));
-      };
+      },
-
+    ));
-      return dispatch(uploadMedia(data, onUploadProgress))
-        .then(({ status, data }) => {
-          // If server-side processing of the media attachment has not completed yet,
-          // poll the server until it is, before showing the media attachment as uploaded
-          if (status === 200) {
-            dispatch(uploadEventBannerSuccess(data, file));
-          } else if (status === 202) {
-            const poll = () => {
-              dispatch(fetchMedia(data.id)).then(({ status, data }) => {
-                if (status === 200) {
-                  dispatch(uploadEventBannerSuccess(data, file));
-                } else if (status === 206) {
-                  setTimeout(() => poll(), 1000);
-                }
-              }).catch(error => dispatch(uploadEventBannerFail(error)));
-            };
-
-            poll();
-          }
-        });
-    }).catch(error => dispatch(uploadEventBannerFail(error)));
   };
 
 const uploadEventBannerRequest = () => ({
@@ -576,6 +544,13 @@ const cancelEventCompose = () => ({
   type: EVENT_COMPOSE_CANCEL,
 });
 
+interface EventFormSetAction {
+  type: typeof EVENT_FORM_SET
+  status: ReducerStatus
+  text: string
+  location: Record<string, any>
+}
+
 const editEvent = (id: string) => (dispatch: AppDispatch, getState: () => RootState) => {
   const status = getState().statuses.get(id)!;
 
@@ -612,7 +587,7 @@ const fetchRecentEvents = () =>
         next: next ? next.uri : null,
       });
     }).catch(error => {
-      dispatch({ type: RECENT_EVENTS_FETCH_FAIL,  error });
+      dispatch({ type: RECENT_EVENTS_FETCH_FAIL, error });
     });
   };
 
@@ -633,10 +608,14 @@ const fetchJoinedEvents = () =>
         next: next ? next.uri : null,
       });
     }).catch(error => {
-      dispatch({ type: JOINED_EVENTS_FETCH_FAIL,  error });
+      dispatch({ type: JOINED_EVENTS_FETCH_FAIL, error });
     });
   };
 
+type EventsAction =
+  | ReturnType<typeof cancelEventCompose>
+  | EventFormSetAction;
+
 export {
   LOCATION_SEARCH_REQUEST,
   LOCATION_SEARCH_SUCCESS,
@@ -743,4 +722,5 @@ export {
   editEvent,
   fetchRecentEvents,
   fetchJoinedEvents,
+  type EventsAction,
 };

src/actions/media.ts

@@ -1,8 +1,22 @@
+import { defineMessages, type IntlShape } from 'react-intl';
+
+import toast from 'soapbox/toast';
+import { isLoggedIn } from 'soapbox/utils/auth';
 import { getFeatures } from 'soapbox/utils/features';
+import { formatBytes, getVideoDuration } from 'soapbox/utils/media';
+import resizeImage from 'soapbox/utils/resize-image';
 
 import api from '../api';
 
+import type { AxiosError } from 'axios';
 import type { AppDispatch, RootState } from 'soapbox/store';
+import type { APIEntity } from 'soapbox/types/entities';
+
+const messages = defineMessages({
+  exceededImageSizeLimit: { id: 'upload_error.image_size_limit', defaultMessage: 'Image exceeds the current file size limit ({limit})' },
+  exceededVideoSizeLimit: { id: 'upload_error.video_size_limit', defaultMessage: 'Video exceeds the current file size limit ({limit})' },
+  exceededVideoDurationLimit: { id: 'upload_error.video_duration_limit', defaultMessage: 'Video exceeds the current duration limit ({limit, plural, one {# second} other {# seconds}})' },
+});
 
 const noOp = (e: any) => {};
 
@@ -41,10 +55,78 @@ const uploadMedia = (data: FormData, onUploadProgress = noOp) =>
     }
   };
 
+const uploadFile = (
+  file: File,
+  intl: IntlShape,
+  onSuccess: (data: APIEntity) => void = () => {},
+  onFail: (error: AxiosError | true) => void = () => {},
+  onProgress: (loaded: number) => void = () => {},
+  changeTotal: (value: number) => void = () => {},
+) =>
+  async (dispatch: AppDispatch, getState: () => RootState) => {
+    if (!isLoggedIn(getState)) return;
+    const maxImageSize = getState().instance.configuration.getIn(['media_attachments', 'image_size_limit']) as number | undefined;
+    const maxVideoSize = getState().instance.configuration.getIn(['media_attachments', 'video_size_limit']) as number | undefined;
+    const maxVideoDuration = getState().instance.configuration.getIn(['media_attachments', 'video_duration_limit']) as number | undefined;
+
+    const isImage = file.type.match(/image.*/);
+    const isVideo = file.type.match(/video.*/);
+    const videoDurationInSeconds = (isVideo && maxVideoDuration) ? await getVideoDuration(file) : 0;
+
+    if (isImage && maxImageSize && (file.size > maxImageSize)) {
+      const limit = formatBytes(maxImageSize);
+      const message = intl.formatMessage(messages.exceededImageSizeLimit, { limit });
+      toast.error(message);
+      onFail(true);
+      return;
+    } else if (isVideo && maxVideoSize && (file.size > maxVideoSize)) {
+      const limit = formatBytes(maxVideoSize);
+      const message = intl.formatMessage(messages.exceededVideoSizeLimit, { limit });
+      toast.error(message);
+      onFail(true);
+      return;
+    } else if (isVideo && maxVideoDuration && (videoDurationInSeconds > maxVideoDuration)) {
+      const message = intl.formatMessage(messages.exceededVideoDurationLimit, { limit: maxVideoDuration });
+      toast.error(message);
+      onFail(true);
+      return;
+    }
+
+    // FIXME: Don't define const in loop
+    resizeImage(file).then(resized => {
+      const data = new FormData();
+      data.append('file', resized);
+      // Account for disparity in size of original image and resized data
+      changeTotal(resized.size - file.size);
+
+      return dispatch(uploadMedia(data, onProgress))
+        .then(({ status, data }) => {
+          // If server-side processing of the media attachment has not completed yet,
+          // poll the server until it is, before showing the media attachment as uploaded
+          if (status === 200) {
+            onSuccess(data);
+          } else if (status === 202) {
+            const poll = () => {
+              dispatch(fetchMedia(data.id)).then(({ status, data }) => {
+                if (status === 200) {
+                  onSuccess(data);
+                } else if (status === 206) {
+                  setTimeout(() => poll(), 1000);
+                }
+              }).catch(error => onFail(error));
+            };
+
+            poll();
+          }
+        });
+    }).catch(error => onFail(error));
+  };
+
 export {
   fetchMedia,
   updateMedia,
   uploadMediaV1,
   uploadMediaV2,
   uploadMedia,
+  uploadFile,
 };

src/components/account.tsx

@@ -76,7 +76,7 @@ export interface IAccount {
   actionAlignment?: 'center' | 'top'
   actionIcon?: string
   actionTitle?: string
-  /** Override other actions for specificity like mute/unmute.  */
+  /** Override other actions for specificity like mute/unmute. */
   actionType?: 'muting' | 'blocking' | 'follow_request'
   avatarSize?: number
   hidden?: boolean

src/components/dropdown-menu/dropdown-menu-item.tsx

@@ -35,7 +35,6 @@ const DropdownMenuItem = ({ index, item, onClick }: IDropdownMenuItem) => {
     if (!item) return;
     if (onClick) onClick();
 
-
     if (item.to) {
       event.preventDefault();
       history.push(item.to);

src/components/markup.css

@@ -92,9 +92,9 @@
   @apply w-5 h-5 m-0;
 }
 
-/* Hide Markdown images (Pleroma) */
+/* Markdown inline images (Pleroma) */
 [data-markup] img:not(.emojione) {
-  @apply hidden;
+  @apply max-h-[500px] mx-auto rounded-sm;
 }
 
 /* User setting to underline links */

src/components/modal-root.tsx

@@ -20,7 +20,7 @@ const messages = defineMessages({
 
 export const checkComposeContent = (compose?: ReturnType<typeof ReducerCompose>) => {
   return !!compose && [
-    compose.text.length > 0,
+    compose.editorState && compose.editorState.length > 0,
     compose.spoiler_text.length > 0,
     compose.media_attachments.size > 0,
     compose.poll !== null,

src/components/status-list.tsx

@@ -20,7 +20,7 @@ interface IStatusList extends Omit<IScrollableList, 'onLoadMore' | 'children'> {
   scrollKey: string
   /** List of status IDs to display. */
   statusIds: ImmutableOrderedSet<string>
-  /** Last _unfiltered_ status ID (maxId) for pagination.  */
+  /** Last _unfiltered_ status ID (maxId) for pagination. */
   lastStatusId?: string
   /** Pinned statuses to show at the top of the feed. */
   featuredStatusIds?: ImmutableOrderedSet<string>

src/components/ui/emoji/emoji.tsx

@@ -5,16 +5,21 @@ import { joinPublicPath } from 'soapbox/utils/static';
 
 interface IEmoji extends React.ImgHTMLAttributes<HTMLImageElement> {
   /** Unicode emoji character. */
-  emoji: string
+  emoji?: string
 }
 
 /** A single emoji image. */
 const Emoji: React.FC<IEmoji> = (props): JSX.Element | null => {
   const { emoji, alt, src, ...rest } = props;
-  const codepoints = toCodePoints(removeVS16s(emoji));
-  const filename = codepoints.join('-');
 
-  if (!filename) return null;
+  let filename;
+
+  if (emoji) {
+    const codepoints = toCodePoints(removeVS16s(emoji));
+    filename = codepoints.join('-');
+  }
+
+  if (!filename && !src) return null;
 
   return (
     <img

src/components/ui/icon/svg-icon.tsx

@@ -1,7 +1,7 @@
 import React from 'react';
-import InlineSVG from 'react-inlinesvg'; // eslint-disable-line no-restricted-imports
+import InlineSVG, { Props as InlineSVGProps } from 'react-inlinesvg'; // eslint-disable-line no-restricted-imports
 
-interface ISvgIcon {
+interface ISvgIcon extends InlineSVGProps {
   /** Class name for the <svg> */
   className?: string
   /** Tooltip text for the icon. */

src/components/ui/input/input.tsx

@@ -84,7 +84,7 @@ const Input = React.forwardRef<HTMLInputElement, IInput>(
           type={revealed ? 'text' : type}
           ref={ref}
           className={clsx('text-base placeholder:text-gray-600 dark:placeholder:text-gray-600', {
-            'block w-full sm:text-sm dark:ring-1 dark:ring-gray-800 focus:ring-primary-500 focus:border-primary-500 dark:focus:ring-primary-500 dark:focus:border-primary-500':
+            'block w-full sm:text-sm ring-1 dark:ring-gray-800 focus:ring-primary-500 focus:border-primary-500 dark:focus:ring-primary-500 dark:focus:border-primary-500':
               ['normal', 'search'].includes(theme),
             'text-gray-900 dark:text-gray-100': !props.disabled,
             'text-gray-600': props.disabled,

src/components/ui/portal/portal.tsx

@@ -15,7 +15,6 @@ const Portal: React.FC<IPortal> = ({ children }) => {
     setIsRendered(true);
   }, []);
 
-
   if (!isRendered) {
     return null;
   }
@@ -28,4 +27,4 @@ const Portal: React.FC<IPortal> = ({ children }) => {
   );
 };
 
-export default Portal;
+export default Portal;

src/components/ui/slider/slider.tsx

@@ -99,7 +99,6 @@ const findElementPosition = (el: HTMLElement) => {
   };
 };
 
-
 const getPointerPosition = (el: HTMLElement, event: MouseEvent & TouchEvent): Point => {
   const box = findElementPosition(el);
   const boxW = el.offsetWidth;
@@ -121,4 +120,4 @@ const getPointerPosition = (el: HTMLElement, event: MouseEvent & TouchEvent): Po
   };
 };
 
-export default Slider;
+export default Slider;

src/components/upload.tsx

@@ -1,13 +1,13 @@
 import clsx from 'clsx';
 import { List as ImmutableList } from 'immutable';
 import React, { useState } from 'react';
-import { defineMessages, useIntl, FormattedMessage } from 'react-intl';
+import { defineMessages, useIntl } from 'react-intl';
 import { spring } from 'react-motion';
 
 import { openModal } from 'soapbox/actions/modals';
 import Blurhash from 'soapbox/components/blurhash';
 import Icon from 'soapbox/components/icon';
-import IconButton from 'soapbox/components/icon-button';
+import { HStack, IconButton } from 'soapbox/components/ui';
 import Motion from 'soapbox/features/ui/util/optional-motion';
 import { useAppDispatch } from 'soapbox/hooks';
 import { Attachment } from 'soapbox/types/entities';
@@ -57,6 +57,7 @@ export const MIMETYPE_ICONS: Record<string, string> = {
 const messages = defineMessages({
   description: { id: 'upload_form.description', defaultMessage: 'Describe for the visually impaired' },
   delete: { id: 'upload_form.undo', defaultMessage: 'Delete' },
+  preview: { id: 'upload_form.preview', defaultMessage: 'Preview' },
 });
 
 interface IUpload {
@@ -152,30 +153,34 @@ const Upload: React.FC<IUpload> = ({
       <Motion defaultStyle={{ scale: 0.8 }} style={{ scale: spring(1, { stiffness: 180, damping: 12 }) }}>
         {({ scale }) => (
           <div
-            className={clsx('compose-form__upload-thumbnail',  mediaType)}
+            className={clsx('compose-form__upload-thumbnail', mediaType)}
             style={{
               transform: `scale(${scale})`,
               backgroundImage: mediaType === 'image' ? `url(${media.preview_url})` : undefined,
               backgroundPosition: typeof x === 'number' && typeof y === 'number' ? `${x}% ${y}%` : undefined }}
           >
-            <div className={clsx('compose-form__upload__actions', { active })}>
+            <HStack className='absolute right-2 top-2 z-10' space={2}>
-              {onDelete && (
-                <IconButton
-                  onClick={handleUndoClick}
-                  src={require('@tabler/icons/x.svg')}
-                  text={<FormattedMessage id='upload_form.undo' defaultMessage='Delete' />}
-                />
-              )}
-
-              {/* Only display the "Preview" button for a valid attachment with a URL */}
               {(withPreview && mediaType !== 'unknown' && Boolean(media.url)) && (
                 <IconButton
                   onClick={handleOpenModal}
                   src={require('@tabler/icons/zoom-in.svg')}
-                  text={<FormattedMessage id='upload_form.preview' defaultMessage='Preview' />}
+                  theme='dark'
+                  className='hover:scale-105 hover:bg-gray-900'
+                  iconClassName='h-5 w-5'
+                  title={intl.formatMessage(messages.preview)}
                 />
               )}
-            </div>
+              {onDelete && (
+                <IconButton
+                  onClick={handleUndoClick}
+                  src={require('@tabler/icons/x.svg')}
+                  theme='dark'
+                  className='hover:scale-105 hover:bg-gray-900'
+                  iconClassName='h-5 w-5'
+                  title={intl.formatMessage(messages.delete)}
+                />
+              )}
+            </HStack>
 
             {onDescriptionChange && (
               <div className={clsx('compose-form__upload-description', { active })}>

src/entity-store/hooks/utils.ts

@@ -12,5 +12,4 @@ function parseEntitiesPath(expandedPath: ExpandedEntitiesPath) {
   };
 }
 
-
+export { parseEntitiesPath };
-export { parseEntitiesPath };

src/features/admin/user-index.tsx

@@ -37,7 +37,6 @@ const UserIndex: React.FC = () => {
     updateQuery();
   }, []);
 
-
   const hasMore = items.count() < total && !!next;
 
   const showLoading = isLoading && items.isEmpty();

src/features/chats/components/__tests__/chat-message-list.test.tsx

@@ -2,7 +2,6 @@ import userEvent from '@testing-library/user-event';
 import React from 'react';
 import { VirtuosoMockContext } from 'react-virtuoso';
 
-
 import { ChatContext } from 'soapbox/contexts/chat-context';
 import { buildAccount } from 'soapbox/jest/factory';
 import { normalizeChatMessage, normalizeInstance } from 'soapbox/normalizers';

src/features/chats/components/chat-pane/__tests__/chat-pane.test.tsx

@@ -5,7 +5,7 @@ import { __stub } from 'soapbox/api';
 import { ChatContext } from 'soapbox/contexts/chat-context';
 import { StatProvider } from 'soapbox/contexts/stat-context';
 import chats from 'soapbox/jest/fixtures/chats.json';
-import {  render, screen, waitFor } from 'soapbox/jest/test-helpers';
+import { render, screen, waitFor } from 'soapbox/jest/test-helpers';
 
 import ChatPane from '../chat-pane';
 

src/features/compose/components/compose-form.tsx

@@ -1,6 +1,7 @@
 import clsx from 'clsx';
+import { CLEAR_EDITOR_COMMAND, type LexicalEditor } from 'lexical';
 import React, { useCallback, useEffect, useRef, useState } from 'react';
-import { defineMessages, FormattedMessage, MessageDescriptor, useIntl } from 'react-intl';
+import { defineMessages, FormattedMessage, useIntl } from 'react-intl';
 import { Link, useHistory } from 'react-router-dom';
 import { length } from 'stringz';
 
@@ -17,6 +18,8 @@ import AutosuggestInput, { AutoSuggestion } from 'soapbox/components/autosuggest
 import AutosuggestTextarea from 'soapbox/components/autosuggest-textarea';
 import { Button, HStack, Stack } from 'soapbox/components/ui';
 import EmojiPickerDropdown from 'soapbox/features/emoji/containers/emoji-picker-dropdown-container';
+import Bundle from 'soapbox/features/ui/components/bundle';
+import { ComposeEditor } from 'soapbox/features/ui/util/async-components';
 import { useAppDispatch, useAppSelector, useCompose, useDraggedFiles, useFeatures, useInstance, usePrevious } from 'soapbox/hooks';
 import { isMobile } from 'soapbox/is-mobile';
 
@@ -49,7 +52,6 @@ const messages = defineMessages({
   placeholder: { id: 'compose_form.placeholder', defaultMessage: 'What\'s on your mind?' },
   pollPlaceholder: { id: 'compose_form.poll_placeholder', defaultMessage: 'Add a poll topic…' },
   eventPlaceholder: { id: 'compose_form.event_placeholder', defaultMessage: 'Post to this event' },
-  spoiler_placeholder: { id: 'compose_form.spoiler_placeholder', defaultMessage: 'Write your warning here (optional)' },
   publish: { id: 'compose_form.publish', defaultMessage: 'Post' },
   publishLoud: { id: 'compose_form.publish_loud', defaultMessage: '{publish}!' },
   message: { id: 'compose_form.message', defaultMessage: 'Message' },
@@ -75,12 +77,24 @@ const ComposeForm = <ID extends string>({ id, shouldCondense, autoFocus, clickab
 
   const compose = useCompose(id);
   const showSearch = useAppSelector((state) => state.search.submitted && !state.search.hidden);
-  const isModalOpen = useAppSelector((state) => !!(state.modals.size && state.modals.last()!.modalType === 'COMPOSE'));
   const maxTootChars = configuration.getIn(['statuses', 'max_characters']) as number;
   const scheduledStatusCount = useAppSelector((state) => state.scheduled_statuses.size);
   const features = useFeatures();
 
-  const { text, suggestions, spoiler, spoiler_text: spoilerText, privacy, focusDate, caretPosition, is_submitting: isSubmitting, is_changing_upload: isChangingUpload, is_uploading: isUploading, schedule: scheduledAt, group_id: groupId } = compose;
+  const {
+    spoiler,
+    spoiler_text: spoilerText,
+    privacy,
+    focusDate,
+    caretPosition,
+    is_submitting: isSubmitting,
+    is_changing_upload:
+    isChangingUpload,
+    is_uploading: isUploading,
+    schedule: scheduledAt,
+    group_id: groupId,
+  } = compose;
+
   const prevSpoiler = usePrevious(spoiler);
 
   const hasPoll = !!compose.poll;
@@ -88,25 +102,16 @@ const ComposeForm = <ID extends string>({ id, shouldCondense, autoFocus, clickab
   const anyMedia = compose.media_attachments.size > 0;
 
   const [composeFocused, setComposeFocused] = useState(false);
+  const [text, setText] = useState('');
 
   const firstRender = useRef(true);
   const formRef = useRef<HTMLDivElement>(null);
   const spoilerTextRef = useRef<AutosuggestInput>(null);
   const autosuggestTextareaRef = useRef<AutosuggestTextarea>(null);
+  const editorRef = useRef<LexicalEditor>(null);
 
   const { isDraggedOver } = useDraggedFiles(formRef);
 
-  const handleChange: React.ChangeEventHandler<HTMLTextAreaElement> = (e) => {
-    dispatch(changeCompose(id, e.target.value));
-  };
-
-  const handleKeyDown: React.KeyboardEventHandler = (e) => {
-    if (e.keyCode === 13 && (e.ctrlKey || e.metaKey)) {
-      handleSubmit();
-      e.preventDefault(); // Prevent bubbling to other ComposeForm instances
-    }
-  };
-
   const getClickableArea = () => {
     return clickableAreaRef ? clickableAreaRef.current : formRef.current;
   };
@@ -141,11 +146,7 @@ const ComposeForm = <ID extends string>({ id, shouldCondense, autoFocus, clickab
   };
 
   const handleSubmit = (e?: React.FormEvent<Element>) => {
-    if (text !== autosuggestTextareaRef.current?.textarea?.value) {
+    dispatch(changeCompose(id, text));
-      // Something changed the text inside the textarea (e.g. browser extensions like Grammarly)
-      // Update the state to match the current text
-      dispatch(changeCompose(id, autosuggestTextareaRef.current!.textarea!.value));
-    }
 
     // Submit disabled:
     const fulltext = [spoilerText, countableText(text)].join('');
@@ -159,6 +160,7 @@ const ComposeForm = <ID extends string>({ id, shouldCondense, autoFocus, clickab
     }
 
     dispatch(submitCompose(id, history));
+    editorRef.current?.dispatchCommand(CLEAR_EDITOR_COMMAND, undefined);
   };
 
   const onSuggestionsClearRequested = () => {
@@ -169,10 +171,6 @@ const ComposeForm = <ID extends string>({ id, shouldCondense, autoFocus, clickab
     dispatch(fetchComposeSuggestions(id, token as string));
   };
 
-  const onSuggestionSelected = (tokenStart: number, token: string | null, value: string | undefined) => {
-    if (value) dispatch(selectComposeSuggestion(id, tokenStart, token, value, ['text']));
-  };
-
   const onSpoilerSuggestionSelected = (tokenStart: number, token: string | null, value: AutoSuggestion) => {
     dispatch(selectComposeSuggestion(id, tokenStart, token, value, ['spoiler_text']));
   };
@@ -249,18 +247,34 @@ const ComposeForm = <ID extends string>({ id, shouldCondense, autoFocus, clickab
   const disabledButton = disabled || isUploading || isChangingUpload || length(countedText) > maxTootChars || (countedText.length !== 0 && countedText.trim().length === 0 && !anyMedia);
   const shouldAutoFocus = autoFocus && !showSearch && !isMobile(window.innerWidth);
 
-  let publishText: string = '';
+  const composeModifiers = !condensed && (
-  let publishIcon: string | undefined;
+    <Stack space={4} className='compose-form__modifiers'>
-  let textareaPlaceholder: MessageDescriptor;
+      <UploadForm composeId={id} />
+      <PollForm composeId={id} />
+
+      <SpoilerInput
+        composeId={id}
+        onSuggestionsFetchRequested={onSuggestionsFetchRequested}
+        onSuggestionsClearRequested={onSuggestionsClearRequested}
+        onSuggestionSelected={onSpoilerSuggestionSelected}
+        ref={spoilerTextRef}
+      />
+
+      <ScheduleFormContainer composeId={id} />
+    </Stack>
+  );
+
+  let publishText: string | JSX.Element = '';
+  let publishIcon: string | undefined = undefined;
 
   if (isEditing) {
     publishText = intl.formatMessage(messages.saveChanges);
   } else if (privacy === 'direct') {
-    publishText = intl.formatMessage(messages.message);
     publishIcon = require('@tabler/icons/mail.svg');
+    publishText = intl.formatMessage(messages.message);
   } else if (privacy === 'private') {
-    publishText = intl.formatMessage(messages.publish);
     publishIcon = require('@tabler/icons/lock.svg');
+    publishText = intl.formatMessage(messages.publish);
   } else {
     publishText = privacy !== 'unlisted' ? intl.formatMessage(messages.publishLoud, { publish: intl.formatMessage(messages.publish) }) : intl.formatMessage(messages.publish);
   }
@@ -269,14 +283,6 @@ const ComposeForm = <ID extends string>({ id, shouldCondense, autoFocus, clickab
     publishText = intl.formatMessage(messages.schedule);
   }
 
-  if (event) {
-    textareaPlaceholder = messages.eventPlaceholder;
-  } else if (hasPoll) {
-    textareaPlaceholder = messages.pollPlaceholder;
-  } else {
-    textareaPlaceholder = messages.placeholder;
-  }
-
   return (
     <Stack className='w-full' space={4} ref={formRef} onClick={handleClick} element='form' onSubmit={handleSubmit}>
       {scheduledStatusCount > 0 && !event && !group && (
@@ -306,42 +312,26 @@ const ComposeForm = <ID extends string>({ id, shouldCondense, autoFocus, clickab
 
       {!shouldCondense && !event && !group && <ReplyMentions composeId={id} />}
 
-      <AutosuggestTextarea
+      <div>
-        ref={(isModalOpen && shouldCondense) ? undefined : autosuggestTextareaRef}
+        <Bundle fetchComponent={ComposeEditor}>
-        placeholder={intl.formatMessage(textareaPlaceholder)}
+          {(Component: any) => (
-        disabled={disabled}
+            <Component
-        value={text}
+              ref={editorRef}
-        onChange={handleChange}
+              className='mt-2'
-        suggestions={suggestions}
+              composeId={id}
-        onKeyDown={handleKeyDown}
+              condensed={condensed}
-        onFocus={handleComposeFocus}
+              eventDiscussion={!!event}
-        onSuggestionsFetchRequested={onSuggestionsFetchRequested}
+              autoFocus={shouldAutoFocus}
-        onSuggestionsClearRequested={onSuggestionsClearRequested}
+              hasPoll={hasPoll}
-        onSuggestionSelected={onSuggestionSelected}
+              handleSubmit={handleSubmit}
-        onPaste={onPaste}
+              onChange={setText}
-        autoFocus={shouldAutoFocus}
+              onFocus={handleComposeFocus}
-        condensed={condensed}
+              onPaste={onPaste}
-        id='compose-textarea'
+            />
-      >
+          )}
-        {
+        </Bundle>
-          !condensed && (
+        {composeModifiers}
-            <Stack space={4} className='compose-form__modifiers'>
+      </div>
-              <UploadForm composeId={id} />
-              <PollForm composeId={id} />
-
-              <SpoilerInput
-                composeId={id}
-                onSuggestionsFetchRequested={onSuggestionsFetchRequested}
-                onSuggestionsClearRequested={onSuggestionsClearRequested}
-                onSuggestionSelected={onSpoilerSuggestionSelected}
-                ref={spoilerTextRef}
-              />
-
-              <ScheduleFormContainer composeId={id} />
-            </Stack>
-          )
-        }
-      </AutosuggestTextarea>
 
       <QuotedStatusContainer composeId={id} />
 
@@ -362,7 +352,7 @@ const ComposeForm = <ID extends string>({ id, shouldCondense, autoFocus, clickab
             </HStack>
           )}
 
-          <Button type='submit' theme='primary' text={publishText} icon={publishIcon} disabled={disabledButton} />
+          <Button type='submit' theme='primary' icon={publishIcon} text={publishText} disabled={disabledButton} />
         </HStack>
       </div>
     </Stack>

src/features/compose/components/upload-button.tsx

@@ -10,7 +10,7 @@ const messages = defineMessages({
   upload: { id: 'upload_button.label', defaultMessage: 'Add media attachment' },
 });
 
-const onlyImages = (types: ImmutableList<string>) => {
+export const onlyImages = (types: ImmutableList<string>) => {
   return Boolean(types && types.every(type => type.startsWith('image/')));
 };
 

src/features/compose/components/upload-form.tsx

@@ -1,6 +1,7 @@
 import clsx from 'clsx';
 import React from 'react';
 
+import { HStack } from 'soapbox/components/ui';
 import { useCompose } from 'soapbox/hooks';
 
 import Upload from './upload';
@@ -14,19 +15,16 @@ interface IUploadForm {
 
 const UploadForm: React.FC<IUploadForm> = ({ composeId }) => {
   const mediaIds = useCompose(composeId).media_attachments.map((item: AttachmentEntity) => item.id);
-  const classes = clsx('compose-form__uploads-wrapper', {
-    'contains-media': mediaIds.size !== 0,
-  });
 
   return (
-    <div className='compose-form__upload-wrapper'>
+    <div className='overflow-hidden'>
       <UploadProgress composeId={composeId} />
 
-      <div className={classes}>
+      <HStack wrap className={clsx('overflow-hidden', mediaIds.size !== 0 && 'p-1')}>
         {mediaIds.map((id: string) => (
           <Upload id={id} key={id} composeId={composeId} />
         ))}
-      </div>
+      </HStack>
     </div>
   );
 };

src/features/compose/editor/LICENSE

@@ -0,0 +1,17 @@
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

src/features/compose/editor/index.tsx

@@ -0,0 +1,177 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the `/src/features/compose/editor` directory.
+ */
+
+import { AutoLinkPlugin, createLinkMatcherWithRegExp } from '@lexical/react/LexicalAutoLinkPlugin';
+import { ClearEditorPlugin } from '@lexical/react/LexicalClearEditorPlugin';
+import { LexicalComposer, InitialConfigType } from '@lexical/react/LexicalComposer';
+import { ContentEditable } from '@lexical/react/LexicalContentEditable';
+import LexicalErrorBoundary from '@lexical/react/LexicalErrorBoundary';
+import { HashtagPlugin } from '@lexical/react/LexicalHashtagPlugin';
+import { HistoryPlugin } from '@lexical/react/LexicalHistoryPlugin';
+import { OnChangePlugin } from '@lexical/react/LexicalOnChangePlugin';
+import { PlainTextPlugin } from '@lexical/react/LexicalPlainTextPlugin';
+import clsx from 'clsx';
+import { $createParagraphNode, $createTextNode, $getRoot, type LexicalEditor } from 'lexical';
+import React, { useMemo, useState } from 'react';
+import { FormattedMessage } from 'react-intl';
+
+import { useAppDispatch } from 'soapbox/hooks';
+
+import { useNodes } from './nodes';
+import AutosuggestPlugin from './plugins/autosuggest-plugin';
+import FocusPlugin from './plugins/focus-plugin';
+import MentionPlugin from './plugins/mention-plugin';
+import RefPlugin from './plugins/ref-plugin';
+import StatePlugin from './plugins/state-plugin';
+
+const LINK_MATCHERS = [
+  createLinkMatcherWithRegExp(
+    /((https?:\/\/(www\.)?)|(www\.))[-a-zA-Z0-9@:%._+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_+.~#?&//=]*)/,
+    (text) => text.startsWith('http') ? text : `https://${text}`,
+  ),
+];
+
+interface IComposeEditor {
+  className?: string
+  placeholderClassName?: string
+  composeId: string
+  condensed?: boolean
+  eventDiscussion?: boolean
+  hasPoll?: boolean
+  autoFocus?: boolean
+  handleSubmit?(): void
+  onPaste?(files: FileList): void
+  onChange?(text: string): void
+  onFocus?: React.FocusEventHandler<HTMLDivElement>
+  placeholder?: JSX.Element | string
+}
+
+const theme: InitialConfigType['theme'] = {
+  hashtag: 'hover:underline text-primary-600 dark:text-accent-blue hover:text-primary-800 dark:hover:text-accent-blue',
+  mention: 'hover:underline text-primary-600 dark:text-accent-blue hover:text-primary-800 dark:hover:text-accent-blue',
+  link: 'hover:underline text-primary-600 dark:text-accent-blue hover:text-primary-800 dark:hover:text-accent-blue',
+  text: {
+    bold: 'font-bold',
+    code: 'font-mono',
+    italic: 'italic',
+    strikethrough: 'line-through',
+    underline: 'underline',
+    underlineStrikethrough: 'underline-line-through',
+  },
+  heading: {
+    h1: 'text-2xl font-bold',
+    h2: 'text-xl font-bold',
+    h3: 'text-lg font-semibold',
+  },
+};
+
+const ComposeEditor = React.forwardRef<LexicalEditor, IComposeEditor>(({
+  className,
+  placeholderClassName,
+  composeId,
+  condensed,
+  eventDiscussion,
+  hasPoll,
+  autoFocus,
+  handleSubmit,
+  onChange,
+  onFocus,
+  onPaste,
+  placeholder,
+}, ref) => {
+  const dispatch = useAppDispatch();
+  const nodes = useNodes();
+
+  const [suggestionsHidden, setSuggestionsHidden] = useState(true);
+
+  const initialConfig = useMemo<InitialConfigType>(() => ({
+    namespace: 'ComposeForm',
+    onError: console.error,
+    nodes,
+    theme,
+    editorState: dispatch((_, getState) => {
+      const state = getState();
+      const compose = state.compose.get(composeId);
+
+      if (!compose) return;
+
+      if (compose.editorState) {
+        return compose.editorState;
+      }
+
+      return () => {
+        const paragraph = $createParagraphNode();
+        const textNode = $createTextNode(compose.text);
+
+        paragraph.append(textNode);
+
+        $getRoot()
+          .clear()
+          .append(paragraph);
+      };
+    }),
+  }), []);
+
+  const handlePaste: React.ClipboardEventHandler<HTMLDivElement> = (e) => {
+    if (onPaste && e.clipboardData && e.clipboardData.files.length === 1) {
+      onPaste(e.clipboardData.files);
+      e.preventDefault();
+    }
+  };
+
+  let textareaPlaceholder = placeholder || <FormattedMessage id='compose_form.placeholder' defaultMessage="What's on your mind?" />;
+
+  if (eventDiscussion) {
+    textareaPlaceholder = <FormattedMessage id='compose_form.event_placeholder' defaultMessage='Post to this event' />;
+  } else if (hasPoll) {
+    textareaPlaceholder = <FormattedMessage id='compose_form.poll_placeholder' defaultMessage='Add a poll topic…' />;
+  }
+
+  return (
+    <LexicalComposer initialConfig={initialConfig}>
+      <div className={clsx('relative', className)}>
+        <PlainTextPlugin
+          contentEditable={
+            <div onFocus={onFocus} onPaste={handlePaste}>
+              <ContentEditable
+                className={clsx('relative z-10 text-[1rem] outline-none transition-[min-height] motion-reduce:transition-none', {
+                  'min-h-[39px]': condensed,
+                  'min-h-[99px]': !condensed,
+                })}
+              />
+            </div>
+          }
+          placeholder={(
+            <div
+              className={clsx(
+                'pointer-events-none absolute top-0 select-none text-[1rem] text-gray-600 dark:placeholder:text-gray-600',
+                placeholderClassName,
+              )}
+            >
+              {textareaPlaceholder}
+            </div>
+          )}
+          ErrorBoundary={LexicalErrorBoundary}
+        />
+        <OnChangePlugin onChange={(_, editor) => {
+          onChange?.(editor.getEditorState().read(() => $getRoot().getTextContent()));
+        }}
+        />
+        <HistoryPlugin />
+        <HashtagPlugin />
+        <MentionPlugin />
+        <AutosuggestPlugin composeId={composeId} suggestionsHidden={suggestionsHidden} setSuggestionsHidden={setSuggestionsHidden} />
+        <AutoLinkPlugin matchers={LINK_MATCHERS} />
+        <StatePlugin composeId={composeId} handleSubmit={handleSubmit} />
+        <FocusPlugin autoFocus={autoFocus} />
+        <ClearEditorPlugin />
+        <RefPlugin ref={ref} />
+      </div>
+    </LexicalComposer>
+  );
+});
+
+export default ComposeEditor;

src/features/compose/editor/nodes/emoji-node.tsx

@@ -0,0 +1,101 @@
+import { $applyNodeReplacement, DecoratorNode } from 'lexical';
+import React from 'react';
+
+import { Emoji } from 'soapbox/components/ui';
+
+import type {
+  DOMExportOutput,
+  EditorConfig,
+  LexicalNode,
+  NodeKey,
+  SerializedLexicalNode,
+  Spread,
+} from 'lexical';
+
+type SerializedEmojiNode = Spread<{
+  name: string
+  src: string
+  type: 'emoji'
+  version: 1
+}, SerializedLexicalNode>;
+
+class EmojiNode extends DecoratorNode<JSX.Element> {
+
+  __name: string;
+  __src: string;
+
+  static getType(): 'emoji' {
+    return 'emoji';
+  }
+
+  static clone(node: EmojiNode): EmojiNode {
+    return new EmojiNode(node.__name, node.__src);
+  }
+
+  constructor(name: string, src: string, key?: NodeKey) {
+    super(key);
+    this.__name = name;
+    this.__src = src;
+  }
+
+  createDOM(config: EditorConfig): HTMLElement {
+    const span = document.createElement('span');
+    const theme = config.theme;
+    const className = theme.emoji;
+    if (className !== undefined) {
+      span.className = className;
+    }
+    return span;
+  }
+
+  updateDOM(): false {
+    return false;
+  }
+
+  exportDOM(): DOMExportOutput {
+    const element = document.createElement('img');
+    element.setAttribute('src', this.__src);
+    element.setAttribute('alt', this.__name);
+    element.classList.add('h-4', 'w-4');
+    return { element };
+  }
+
+  static importJSON(serializedNode: SerializedEmojiNode): EmojiNode {
+    const { name, src } =
+      serializedNode;
+    const node = $createEmojiNode(name, src);
+    return node;
+  }
+
+  exportJSON(): SerializedEmojiNode {
+    return {
+      name: this.__name,
+      src: this.__src,
+      type: 'emoji',
+      version: 1,
+    };
+  }
+
+  canInsertTextBefore(): boolean {
+    return false;
+  }
+
+  isTextEntity(): true {
+    return true;
+  }
+
+  decorate(): JSX.Element {
+    return (
+      <Emoji src={this.__src} alt={this.__name} className='emojione h-4 w-4' />
+    );
+  }
+
+}
+
+const $createEmojiNode = (name = '', src: string): EmojiNode => $applyNodeReplacement(new EmojiNode(name, src));
+
+const $isEmojiNode = (
+  node: LexicalNode | null | undefined,
+): node is EmojiNode => node instanceof EmojiNode;
+
+export { EmojiNode, $createEmojiNode, $isEmojiNode };

src/features/compose/editor/nodes/image-component.tsx

@@ -0,0 +1,359 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+import { useLexicalComposerContext } from '@lexical/react/LexicalComposerContext';
+import { useLexicalNodeSelection } from '@lexical/react/useLexicalNodeSelection';
+import { mergeRegister } from '@lexical/utils';
+import clsx from 'clsx';
+import { List as ImmutableList } from 'immutable';
+import {
+  $getNodeByKey,
+  $getSelection,
+  $isNodeSelection,
+  $setSelection,
+  CLICK_COMMAND,
+  COMMAND_PRIORITY_LOW,
+  DRAGSTART_COMMAND,
+  KEY_BACKSPACE_COMMAND,
+  KEY_DELETE_COMMAND,
+  KEY_ENTER_COMMAND,
+  KEY_ESCAPE_COMMAND,
+  SELECTION_CHANGE_COMMAND,
+} from 'lexical';
+import * as React from 'react';
+import { Suspense, useCallback, useEffect, useRef, useState } from 'react';
+import { defineMessages, useIntl } from 'react-intl';
+
+import { openModal } from 'soapbox/actions/modals';
+import { HStack, IconButton } from 'soapbox/components/ui';
+import { useAppDispatch } from 'soapbox/hooks';
+import { normalizeAttachment } from 'soapbox/normalizers';
+
+import { $isImageNode } from './image-node';
+
+import type {
+  GridSelection,
+  LexicalEditor,
+  NodeKey,
+  NodeSelection,
+  RangeSelection,
+} from 'lexical';
+
+const messages = defineMessages({
+  description: { id: 'upload_form.description', defaultMessage: 'Describe for the visually impaired' },
+});
+
+const imageCache = new Set();
+
+const useSuspenseImage = (src: string) => {
+  if (!imageCache.has(src)) {
+    throw new Promise((resolve) => {
+      const img = new Image();
+      img.src = src;
+      img.onload = () => {
+        imageCache.add(src);
+        resolve(null);
+      };
+    });
+  }
+};
+
+const LazyImage = ({
+  altText,
+  className,
+  imageRef,
+  src,
+}: {
+  altText: string
+  className: string | null
+  imageRef: {current: null | HTMLImageElement}
+  src: string
+}): JSX.Element => {
+  useSuspenseImage(src);
+  return (
+    <img
+      className={className || undefined}
+      src={src}
+      alt={altText}
+      ref={imageRef}
+      draggable='false'
+    />
+  );
+};
+
+const ImageComponent = ({
+  src,
+  altText,
+  nodeKey,
+}: {
+  altText: string
+  nodeKey: NodeKey
+  src: string
+}): JSX.Element => {
+  const intl = useIntl();
+  const dispatch = useAppDispatch();
+
+  const imageRef = useRef<null | HTMLImageElement>(null);
+  const buttonRef = useRef<HTMLButtonElement | null>(null);
+  const [isSelected, setSelected, clearSelection] =
+    useLexicalNodeSelection(nodeKey);
+  const [editor] = useLexicalComposerContext();
+  const [selection, setSelection] = useState<
+    RangeSelection | NodeSelection | GridSelection | null
+  >(null);
+  const activeEditorRef = useRef<LexicalEditor | null>(null);
+
+  const [hovered, setHovered] = useState(false);
+  const [focused, setFocused] = useState(false);
+  const [dirtyDescription, setDirtyDescription] = useState<string | null>(null);
+
+  const deleteNode = useCallback(
+    () => {
+      editor.update(() => {
+        const node = $getNodeByKey(nodeKey);
+        if ($isImageNode(node)) {
+          node.remove();
+        }
+      });
+    },
+    [nodeKey],
+  );
+
+  const previewImage = () => {
+    const image = normalizeAttachment({
+      type: 'image',
+      url: src,
+      altText,
+    });
+
+    dispatch(openModal('MEDIA', { media: ImmutableList.of(image), index: 0 }));
+  };
+
+  const onDelete = useCallback(
+    (payload: KeyboardEvent) => {
+      if (isSelected && $isNodeSelection($getSelection())) {
+        const event: KeyboardEvent = payload;
+        event.preventDefault();
+        deleteNode();
+      }
+      return false;
+    },
+    [isSelected, nodeKey],
+  );
+
+  const onEnter = useCallback(
+    (event: KeyboardEvent) => {
+      const latestSelection = $getSelection();
+      const buttonElem = buttonRef.current;
+      if (isSelected && $isNodeSelection(latestSelection) && latestSelection.getNodes().length === 1) {
+        if (buttonElem !== null && buttonElem !== document.activeElement) {
+          event.preventDefault();
+          buttonElem.focus();
+          return true;
+        }
+      }
+      return false;
+    },
+    [isSelected],
+  );
+
+  const onEscape = useCallback(
+    (event: KeyboardEvent) => {
+      if (buttonRef.current === event.target) {
+        $setSelection(null);
+        editor.update(() => {
+          setSelected(true);
+          const parentRootElement = editor.getRootElement();
+          if (parentRootElement !== null) {
+            parentRootElement.focus();
+          }
+        });
+        return true;
+      }
+      return false;
+    },
+    [editor, setSelected],
+  );
+
+  const handleKeyDown: React.KeyboardEventHandler = (e) => {
+    if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) {
+      handleInputBlur();
+    }
+  };
+
+  const handleInputBlur = () => {
+    setFocused(false);
+
+    if (dirtyDescription !== null) {
+      editor.update(() => {
+        const node = $getNodeByKey(nodeKey);
+        if ($isImageNode(node)) {
+          node.setAltText(dirtyDescription);
+        }
+
+        setDirtyDescription(null);
+      });
+    }
+  };
+
+  const handleInputChange: React.ChangeEventHandler<HTMLTextAreaElement> = e => {
+    setDirtyDescription(e.target.value);
+  };
+
+  const handleMouseEnter = () => {
+    setHovered(true);
+  };
+
+  const handleMouseLeave = () => {
+    setHovered(false);
+  };
+
+  const handleInputFocus = () => {
+    setFocused(true);
+  };
+
+  const handleClick = () => {
+    setFocused(true);
+  };
+
+  useEffect(() => {
+    let isMounted = true;
+    const unregister = mergeRegister(
+      editor.registerUpdateListener(({ editorState }) => {
+        if (isMounted) {
+          setSelection(editorState.read(() => $getSelection()));
+        }
+      }),
+      editor.registerCommand(
+        SELECTION_CHANGE_COMMAND,
+        (_, activeEditor) => {
+          activeEditorRef.current = activeEditor;
+          return false;
+        },
+        COMMAND_PRIORITY_LOW,
+      ),
+      editor.registerCommand<MouseEvent>(
+        CLICK_COMMAND,
+        (payload) => {
+          const event = payload;
+
+          if (event.target === imageRef.current) {
+            if (event.shiftKey) {
+              setSelected(!isSelected);
+            } else {
+              clearSelection();
+              setSelected(true);
+            }
+            return true;
+          }
+
+          return false;
+        },
+        COMMAND_PRIORITY_LOW,
+      ),
+      editor.registerCommand(
+        DRAGSTART_COMMAND,
+        (event) => {
+          if (event.target === imageRef.current) {
+            // TODO This is just a temporary workaround for FF to behave like other browsers.
+            // Ideally, this handles drag & drop too (and all browsers).
+            event.preventDefault();
+            return true;
+          }
+          return false;
+        },
+        COMMAND_PRIORITY_LOW,
+      ),
+      editor.registerCommand(
+        KEY_DELETE_COMMAND,
+        onDelete,
+        COMMAND_PRIORITY_LOW,
+      ),
+      editor.registerCommand(
+        KEY_BACKSPACE_COMMAND,
+        onDelete,
+        COMMAND_PRIORITY_LOW,
+      ),
+      editor.registerCommand(KEY_ENTER_COMMAND, onEnter, COMMAND_PRIORITY_LOW),
+      editor.registerCommand(
+        KEY_ESCAPE_COMMAND,
+        onEscape,
+        COMMAND_PRIORITY_LOW,
+      ),
+    );
+    return () => {
+      isMounted = false;
+      unregister();
+    };
+  }, [
+    clearSelection,
+    editor,
+    isSelected,
+    nodeKey,
+    onDelete,
+    onEnter,
+    onEscape,
+    setSelected,
+  ]);
+
+  const active = hovered || focused;
+  const description = dirtyDescription || (dirtyDescription !== '' && altText) || '';
+  const draggable = isSelected && $isNodeSelection(selection);
+
+  return (
+    <Suspense fallback={null}>
+      <>
+        <div className='relative' draggable={draggable} onMouseEnter={handleMouseEnter} onMouseLeave={handleMouseLeave} onClick={handleClick}  role='button'>
+          <HStack className='absolute right-2 top-2 z-10' space={2}>
+            <IconButton
+              onClick={previewImage}
+              src={require('@tabler/icons/zoom-in.svg')}
+              theme='dark'
+              className='!p-1.5 hover:scale-105 hover:bg-gray-900'
+              iconClassName='h-5 w-5'
+            />
+            <IconButton
+              onClick={deleteNode}
+              src={require('@tabler/icons/x.svg')}
+              theme='dark'
+              className='!p-1.5 hover:scale-105 hover:bg-gray-900'
+              iconClassName='h-5 w-5'
+            />
+          </HStack>
+
+          <div className={clsx('compose-form__upload-description', { active })}>
+            <label>
+              <span style={{ display: 'none' }}>{intl.formatMessage(messages.description)}</span>
+
+              <textarea
+                placeholder={intl.formatMessage(messages.description)}
+                value={description}
+                onFocus={handleInputFocus}
+                onChange={handleInputChange}
+                onBlur={handleInputBlur}
+                onKeyDown={handleKeyDown}
+              />
+            </label>
+          </div>
+
+          <LazyImage
+            className={
+              clsx('cursor-default', {
+                'select-none': isSelected,
+                'cursor-grab active:cursor-grabbing': isSelected && $isNodeSelection(selection),
+              })
+            }
+            src={src}
+            altText={altText}
+            imageRef={imageRef}
+          />
+        </div>
+      </>
+    </Suspense>
+  );
+};
+
+export default ImageComponent;

src/features/compose/editor/nodes/image-node.tsx

@@ -0,0 +1,179 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+import { $applyNodeReplacement, DecoratorNode } from 'lexical';
+import * as React from 'react';
+import { Suspense } from 'react';
+
+import type {
+  DOMConversionMap,
+  DOMConversionOutput,
+  DOMExportOutput,
+  EditorConfig,
+  LexicalNode,
+  NodeKey,
+  SerializedLexicalNode,
+  Spread,
+} from 'lexical';
+
+const ImageComponent = React.lazy(() => import('./image-component'));
+
+interface ImagePayload {
+  altText?: string
+  key?: NodeKey
+  src: string
+}
+
+const convertImageElement = (domNode: Node): null | DOMConversionOutput => {
+  if (domNode instanceof HTMLImageElement) {
+    const { alt: altText, src } = domNode;
+    const node = $createImageNode({ altText, src });
+    return { node };
+  }
+  return null;
+};
+
+type SerializedImageNode = Spread<
+  {
+    altText: string
+    src: string
+  },
+  SerializedLexicalNode
+>;
+
+class ImageNode extends DecoratorNode<JSX.Element> {
+
+  __src: string;
+  __altText: string;
+
+  static getType(): string {
+    return 'image';
+  }
+
+  static clone(node: ImageNode): ImageNode {
+    return new ImageNode(
+      node.__src,
+      node.__altText,
+      node.__key,
+    );
+  }
+
+  static importJSON(serializedNode: SerializedImageNode): ImageNode {
+    const { altText, src } =
+      serializedNode;
+    const node = $createImageNode({
+      altText,
+      src,
+    });
+    return node;
+  }
+
+  exportDOM(): DOMExportOutput {
+    const element = document.createElement('img');
+    element.setAttribute('src', this.__src);
+    element.setAttribute('alt', this.__altText);
+    return { element };
+  }
+
+  static importDOM(): DOMConversionMap | null {
+    return {
+      img: (node: Node) => ({
+        conversion: convertImageElement,
+        priority: 0,
+      }),
+    };
+  }
+
+  constructor(
+    src: string,
+    altText: string,
+    key?: NodeKey,
+  ) {
+    super(key);
+    this.__src = src;
+    this.__altText = altText;
+  }
+
+  exportJSON(): SerializedImageNode {
+    return {
+      altText: this.getAltText(),
+      src: this.getSrc(),
+      type: 'image',
+      version: 1,
+    };
+  }
+
+  // View
+
+  createDOM(config: EditorConfig): HTMLElement {
+    const span = document.createElement('span');
+    const theme = config.theme;
+    const className = theme.image;
+    if (className !== undefined) {
+      span.className = className;
+    }
+    return span;
+  }
+
+  updateDOM(): false {
+    return false;
+  }
+
+  getSrc(): string {
+    return this.__src;
+  }
+
+  getAltText(): string {
+    return this.__altText;
+  }
+
+  setAltText(altText: string): void {
+    const writable = this.getWritable();
+
+    if (altText !== undefined) {
+      writable.__altText = altText;
+    }
+  }
+
+  decorate(): JSX.Element {
+    return (
+      <Suspense fallback={null}>
+        <ImageComponent
+          src={this.__src}
+          altText={this.__altText}
+          nodeKey={this.getKey()}
+        />
+      </Suspense>
+    );
+  }
+
+}
+
+const $createImageNode = ({
+  altText = '',
+  src,
+  key,
+}: ImagePayload): ImageNode => {
+  return $applyNodeReplacement(
+    new ImageNode(
+      src,
+      altText,
+      key,
+    ),
+  );
+};
+
+const $isImageNode = (
+  node: LexicalNode | null | undefined,
+): node is ImageNode => node instanceof ImageNode;
+
+export {
+  type ImagePayload,
+  type SerializedImageNode,
+  ImageNode,
+  $createImageNode,
+  $isImageNode,
+};

src/features/compose/editor/nodes/index.ts

@@ -0,0 +1,51 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+import { CodeHighlightNode, CodeNode } from '@lexical/code';
+import { HashtagNode } from '@lexical/hashtag';
+import { AutoLinkNode, LinkNode } from '@lexical/link';
+import { ListItemNode, ListNode } from '@lexical/list';
+import { HorizontalRuleNode } from '@lexical/react/LexicalHorizontalRuleNode';
+import { HeadingNode, QuoteNode } from '@lexical/rich-text';
+
+import { useFeatures, useInstance } from 'soapbox/hooks';
+
+import { EmojiNode } from './emoji-node';
+import { ImageNode } from './image-node';
+import { MentionNode } from './mention-node';
+
+import type { Klass, LexicalNode } from 'lexical';
+
+const useNodes = () => {
+  const features = useFeatures();
+  const instance = useInstance();
+
+  const nodes: Array<Klass<LexicalNode>> = [
+    AutoLinkNode,
+    HashtagNode,
+    EmojiNode,
+    MentionNode,
+  ];
+
+  if (features.richText) {
+    nodes.push(
+      CodeHighlightNode,
+      CodeNode,
+      HorizontalRuleNode,
+      LinkNode,
+      ListItemNode,
+      ListNode,
+      QuoteNode,
+    );
+  }
+
+  if (instance.pleroma.getIn(['metadata', 'markup', 'allow_headings'])) nodes.push(HeadingNode);
+  if (instance.pleroma.getIn(['metadata', 'markup', 'allow_inline_images'])) nodes.push(ImageNode);
+
+  return nodes;
+};
+
+export { useNodes };

src/features/compose/editor/nodes/mention-node.ts

@@ -0,0 +1,69 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+import { addClassNamesToElement } from '@lexical/utils';
+import { $applyNodeReplacement, TextNode } from 'lexical';
+
+import type {
+  EditorConfig,
+  LexicalNode,
+  NodeKey,
+  SerializedTextNode,
+} from 'lexical';
+
+class MentionNode extends TextNode {
+
+  static getType(): string {
+    return 'mention';
+  }
+
+  static clone(node: MentionNode): MentionNode {
+    return new MentionNode(node.__text, node.__key);
+  }
+
+  constructor(text: string, key?: NodeKey) {
+    super(text, key);
+  }
+
+  createDOM(config: EditorConfig): HTMLElement {
+    const element = super.createDOM(config);
+    addClassNamesToElement(element, config.theme.mention);
+    return element;
+  }
+
+  static importJSON(serializedNode: SerializedTextNode): MentionNode {
+    const node = $createMentionNode(serializedNode.text);
+    node.setFormat(serializedNode.format);
+    node.setDetail(serializedNode.detail);
+    node.setMode(serializedNode.mode);
+    node.setStyle(serializedNode.style);
+    return node;
+  }
+
+  exportJSON(): SerializedTextNode {
+    return {
+      ...super.exportJSON(),
+      type: 'mention',
+    };
+  }
+
+  canInsertTextBefore(): boolean {
+    return false;
+  }
+
+  isTextEntity(): true {
+    return true;
+  }
+
+}
+
+const $createMentionNode = (text = ''): MentionNode => $applyNodeReplacement(new MentionNode(text));
+
+const $isMentionNode = (
+  node: LexicalNode | null | undefined,
+): node is MentionNode => node instanceof MentionNode;
+
+export { MentionNode, $createMentionNode, $isMentionNode };

src/features/compose/editor/nodes/mention-node.tsx

@@ -0,0 +1,69 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+import { addClassNamesToElement } from '@lexical/utils';
+import { $applyNodeReplacement, TextNode } from 'lexical';
+
+import type {
+  EditorConfig,
+  LexicalNode,
+  NodeKey,
+  SerializedTextNode,
+} from 'lexical';
+
+class MentionNode extends TextNode {
+
+  static getType(): string {
+    return 'mention';
+  }
+
+  static clone(node: MentionNode): MentionNode {
+    return new MentionNode(node.__text, node.__key);
+  }
+
+  constructor(text: string, key?: NodeKey) {
+    super(text, key);
+  }
+
+  createDOM(config: EditorConfig): HTMLElement {
+    const element = super.createDOM(config);
+    addClassNamesToElement(element, config.theme.mention);
+    return element;
+  }
+
+  static importJSON(serializedNode: SerializedTextNode): MentionNode {
+    const node = $createMentionNode(serializedNode.text);
+    node.setFormat(serializedNode.format);
+    node.setDetail(serializedNode.detail);
+    node.setMode(serializedNode.mode);
+    node.setStyle(serializedNode.style);
+    return node;
+  }
+
+  exportJSON(): SerializedTextNode {
+    return {
+      ...super.exportJSON(),
+      type: 'mention',
+    };
+  }
+
+  canInsertTextBefore(): boolean {
+    return false;
+  }
+
+  isTextEntity(): true {
+    return true;
+  }
+
+}
+
+const $createMentionNode = (text = ''): MentionNode => $applyNodeReplacement(new MentionNode(text));
+
+const $isMentionNode = (
+  node: LexicalNode | null | undefined,
+): node is MentionNode => node instanceof MentionNode;
+
+export { MentionNode, $createMentionNode, $isMentionNode };

src/features/compose/editor/plugins/autosuggest-plugin.tsx

@@ -0,0 +1,561 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+import { useLexicalComposerContext } from '@lexical/react/LexicalComposerContext';
+import { mergeRegister } from '@lexical/utils';
+import clsx from 'clsx';
+import {
+  $getSelection,
+  $isRangeSelection,
+  $isTextNode,
+  COMMAND_PRIORITY_LOW,
+  KEY_ARROW_DOWN_COMMAND,
+  KEY_ARROW_UP_COMMAND,
+  KEY_ENTER_COMMAND,
+  KEY_ESCAPE_COMMAND,
+  KEY_TAB_COMMAND,
+  LexicalEditor,
+  RangeSelection,
+} from 'lexical';
+import React, {
+  MutableRefObject,
+  ReactPortal,
+  useCallback,
+  useEffect,
+  useRef,
+  useState,
+} from 'react';
+import ReactDOM from 'react-dom';
+
+import { clearComposeSuggestions, fetchComposeSuggestions } from 'soapbox/actions/compose';
+import { useEmoji } from 'soapbox/actions/emojis';
+import AutosuggestEmoji from 'soapbox/components/autosuggest-emoji';
+import { isNativeEmoji } from 'soapbox/features/emoji';
+import { useAppDispatch, useCompose } from 'soapbox/hooks';
+import { selectAccount } from 'soapbox/selectors';
+import { textAtCursorMatchesToken } from 'soapbox/utils/suggestions';
+
+import AutosuggestAccount from '../../components/autosuggest-account';
+import { $createEmojiNode } from '../nodes/emoji-node';
+
+import type { AutoSuggestion } from 'soapbox/components/autosuggest-input';
+
+type QueryMatch = {
+  leadOffset: number
+  matchingString: string
+};
+
+type Resolution = {
+  match: QueryMatch
+  getRect: () => DOMRect
+};
+
+type MenuRenderFn = (
+  anchorElementRef: MutableRefObject<HTMLElement | null>,
+) => ReactPortal | JSX.Element | null;
+
+const tryToPositionRange = (leadOffset: number, range: Range): boolean => {
+  const domSelection = window.getSelection();
+  if (domSelection === null || !domSelection.isCollapsed) {
+    return false;
+  }
+  const anchorNode = domSelection.anchorNode;
+  const startOffset = leadOffset;
+  const endOffset = domSelection.anchorOffset;
+
+  if (!anchorNode || !endOffset) {
+    return false;
+  }
+
+  try {
+    range.setStart(anchorNode, startOffset);
+    range.setEnd(anchorNode, endOffset);
+  } catch (error) {
+    return false;
+  }
+
+  return true;
+};
+
+const isSelectionOnEntityBoundary = (
+  editor: LexicalEditor,
+  offset: number,
+): boolean => {
+  if (offset !== 0) {
+    return false;
+  }
+  return editor.getEditorState().read(() => {
+    const selection = $getSelection();
+    if ($isRangeSelection(selection)) {
+      const anchor = selection.anchor;
+      const anchorNode = anchor.getNode();
+      const prevSibling = anchorNode.getPreviousSibling();
+      return $isTextNode(prevSibling) && prevSibling.isTextEntity();
+    }
+    return false;
+  });
+};
+
+const startTransition = (callback: () => void) => {
+  if (React.startTransition) {
+    React.startTransition(callback);
+  } else {
+    callback();
+  }
+};
+
+// Got from https://stackoverflow.com/a/42543908/2013580
+const getScrollParent = (
+  element: HTMLElement,
+  includeHidden: boolean,
+): HTMLElement | HTMLBodyElement => {
+  let style = getComputedStyle(element);
+  const excludeStaticParent = style.position === 'absolute';
+  const overflowRegex = includeHidden
+    ? /(auto|scroll|hidden)/
+    : /(auto|scroll)/;
+  if (style.position === 'fixed') {
+    return document.body;
+  }
+  for (let parent: HTMLElement | null = element; (parent = parent.parentElement);) {
+    style = getComputedStyle(parent);
+    if (excludeStaticParent && style.position === 'static') {
+      continue;
+    }
+    if (overflowRegex.test(style.overflow + style.overflowY + style.overflowX)) {
+      return parent;
+    }
+  }
+  return document.body;
+};
+
+const isTriggerVisibleInNearestScrollContainer = (
+  targetElement: HTMLElement,
+  containerElement: HTMLElement,
+): boolean => {
+  const tRect = targetElement.getBoundingClientRect();
+  const cRect = containerElement.getBoundingClientRect();
+  return tRect.top > cRect.top && tRect.top < cRect.bottom;
+};
+
+// Reposition the menu on scroll, window resize, and element resize.
+const useDynamicPositioning = (
+  resolution: Resolution | null,
+  targetElement: HTMLElement | null,
+  onReposition: () => void,
+  onVisibilityChange?: (isInView: boolean) => void,
+) => {
+  const [editor] = useLexicalComposerContext();
+  useEffect(() => {
+    if (targetElement && resolution) {
+      const rootElement = editor.getRootElement();
+      const rootScrollParent =
+        rootElement
+          ? getScrollParent(rootElement, false)
+          : document.body;
+      let ticking = false;
+      let previousIsInView = isTriggerVisibleInNearestScrollContainer(
+        targetElement,
+        rootScrollParent,
+      );
+      const handleScroll = () => {
+        if (!ticking) {
+          window.requestAnimationFrame(() => {
+            onReposition();
+            ticking = false;
+          });
+          ticking = true;
+        }
+        const isInView = isTriggerVisibleInNearestScrollContainer(
+          targetElement,
+          rootScrollParent,
+        );
+        if (isInView !== previousIsInView) {
+          previousIsInView = isInView;
+          if (onVisibilityChange) {
+            onVisibilityChange(isInView);
+          }
+        }
+      };
+      const resizeObserver = new ResizeObserver(onReposition);
+      window.addEventListener('resize', onReposition);
+      document.addEventListener('scroll', handleScroll, {
+        capture: true,
+        passive: true,
+      });
+      resizeObserver.observe(targetElement);
+      return () => {
+        resizeObserver.unobserve(targetElement);
+        window.removeEventListener('resize', onReposition);
+        document.removeEventListener('scroll', handleScroll);
+      };
+    }
+  }, [targetElement, editor, onVisibilityChange, onReposition, resolution]);
+};
+
+const LexicalPopoverMenu = ({ anchorElementRef, menuRenderFn }: {
+  anchorElementRef: MutableRefObject<HTMLElement>
+  menuRenderFn: MenuRenderFn
+}): JSX.Element | null => menuRenderFn(anchorElementRef);
+
+const useMenuAnchorRef = (
+  resolution: Resolution | null,
+  setResolution: (r: Resolution | null) => void,
+): MutableRefObject<HTMLElement> => {
+  const [editor] = useLexicalComposerContext();
+  const anchorElementRef = useRef<HTMLElement>(document.createElement('div'));
+  const positionMenu = useCallback(() => {
+    const rootElement = editor.getRootElement();
+    const containerDiv = anchorElementRef.current;
+
+    if (rootElement !== null && resolution !== null) {
+      const { left, top, width, height } = resolution.getRect();
+      containerDiv.style.top = `${top + window.scrollY}px`;
+      containerDiv.style.left = `${left + window.scrollX}px`;
+      containerDiv.style.height = `${height}px`;
+      containerDiv.style.width = `${width}px`;
+
+      if (!containerDiv.isConnected) {
+        containerDiv.setAttribute('aria-label', 'Typeahead menu');
+        containerDiv.setAttribute('id', 'typeahead-menu');
+        containerDiv.setAttribute('role', 'listbox');
+        containerDiv.style.display = 'block';
+        containerDiv.style.position = 'absolute';
+        document.body.append(containerDiv);
+      }
+      anchorElementRef.current = containerDiv;
+      rootElement.setAttribute('aria-controls', 'typeahead-menu');
+    }
+  }, [editor, resolution]);
+
+  useEffect(() => {
+    const rootElement = editor.getRootElement();
+    if (resolution !== null) {
+      positionMenu();
+      return () => {
+        if (rootElement !== null) {
+          rootElement.removeAttribute('aria-controls');
+        }
+
+        const containerDiv = anchorElementRef.current;
+        if (containerDiv !== null && containerDiv.isConnected) {
+          containerDiv.remove();
+        }
+      };
+    }
+  }, [editor, positionMenu, resolution]);
+
+  const onVisibilityChange = useCallback(
+    (isInView: boolean) => {
+      if (resolution !== null) {
+        if (!isInView) {
+          setResolution(null);
+        }
+      }
+    },
+    [resolution, setResolution],
+  );
+
+  useDynamicPositioning(
+    resolution,
+    anchorElementRef.current,
+    positionMenu,
+    onVisibilityChange,
+  );
+
+  return anchorElementRef;
+};
+
+type AutosuggestPluginProps = {
+  composeId: string
+  suggestionsHidden: boolean
+  setSuggestionsHidden: (value: boolean) => void
+};
+
+const AutosuggestPlugin = ({
+  composeId,
+  suggestionsHidden,
+  setSuggestionsHidden,
+}: AutosuggestPluginProps): JSX.Element | null => {
+  const { suggestions } = useCompose(composeId);
+  const dispatch = useAppDispatch();
+
+  const [editor] = useLexicalComposerContext();
+  const [resolution, setResolution] = useState<Resolution | null>(null);
+  const [selectedSuggestion, setSelectedSuggestion] = useState(0);
+  const anchorElementRef = useMenuAnchorRef(
+    resolution,
+    setResolution,
+  );
+
+  const handleSelectSuggestion: React.MouseEventHandler<HTMLDivElement> = (e) => {
+    e.preventDefault();
+    const index = Number(e.currentTarget.getAttribute('data-index'));
+    return onSelectSuggestion(index);
+  };
+
+  const onSelectSuggestion = (index: number) => {
+    const suggestion = suggestions.get(index) as AutoSuggestion;
+
+    editor.update(() => {
+      dispatch((dispatch, getState) => {
+        const state = editor.getEditorState();
+        const node = (state._selection as RangeSelection)?.anchor?.getNode();
+
+        if (typeof suggestion === 'object') {
+          if (!suggestion.id) return;
+
+          dispatch(useEmoji(suggestion)); // eslint-disable-line react-hooks/rules-of-hooks
+
+          const { leadOffset, matchingString } = resolution!.match;
+
+          if (isNativeEmoji(suggestion)) {
+            node.spliceText(leadOffset - 1, matchingString.length, `${suggestion.native} `, true);
+          } else {
+            const completion = suggestion.colons;
+
+            let emojiText;
+
+            if (leadOffset === 1) emojiText = node;
+            else [, emojiText] = node.splitText(leadOffset - 1);
+
+            [emojiText] = emojiText.splitText(matchingString.length);
+
+            emojiText?.replace($createEmojiNode(completion, suggestion.imageUrl));
+          }
+        } else if (suggestion[0] === '#') {
+          node.setTextContent(`${suggestion} `);
+          node.select();
+        } else {
+          const content = selectAccount(getState(), suggestion)!.acct;
+
+          node.setTextContent(`@${content} `);
+          node.select();
+        }
+
+        dispatch(clearComposeSuggestions(composeId));
+      });
+    });
+  };
+
+  const getQueryTextForSearch = (editor: LexicalEditor) => {
+    const state = editor.getEditorState();
+    const node = (state._selection as RangeSelection)?.anchor?.getNode();
+
+    if (!node) return null;
+
+    if (['mention', 'hashtag'].includes(node.getType())) {
+      const matchingString = node.getTextContent();
+      return { leadOffset: 0, matchingString };
+    }
+
+    if (node.getType() === 'text') {
+      const [leadOffset, matchingString] = textAtCursorMatchesToken(node.getTextContent(), (state._selection as RangeSelection)?.anchor?.offset, [':']);
+      if (!leadOffset || !matchingString) return null;
+      return { leadOffset, matchingString };
+    }
+
+    return null;
+  };
+
+  const renderSuggestion = (suggestion: AutoSuggestion, i: number) => {
+    let inner: string | JSX.Element;
+    let key: React.Key;
+
+    if (typeof suggestion === 'object') {
+      inner = <AutosuggestEmoji emoji={suggestion} />;
+      key = suggestion.id;
+    } else if (suggestion[0] === '#') {
+      inner = suggestion;
+      key = suggestion;
+    } else {
+      inner = <AutosuggestAccount id={suggestion} />;
+      key = suggestion;
+    }
+
+    return (
+      <div
+        role='button'
+        tabIndex={0}
+        key={key}
+        data-index={i}
+        className={clsx({
+          'px-4 py-2.5 text-sm text-gray-700 dark:text-gray-500 hover:bg-gray-100 dark:hover:bg-gray-800 focus:bg-gray-100 dark:focus:bg-primary-800 group': true,
+          'bg-gray-100 dark:bg-gray-800 hover:bg-gray-100 dark:hover:bg-gray-800': i === selectedSuggestion,
+        })}
+        onMouseDown={handleSelectSuggestion}
+      >
+        {inner}
+      </div>
+    );
+  };
+
+  const closeTypeahead = useCallback(() => {
+    setResolution(null);
+  }, [resolution]);
+
+  const openTypeahead = useCallback(
+    (res: Resolution) => {
+      setResolution(res);
+    },
+    [resolution],
+  );
+
+  useEffect(() => {
+    const updateListener = () => {
+      editor.getEditorState().read(() => {
+        const range = document.createRange();
+        const match = getQueryTextForSearch(editor);
+        const nativeSelection = window.getSelection();
+
+        if (!match || nativeSelection?.anchorOffset !== nativeSelection?.focusOffset) {
+          closeTypeahead();
+          return;
+        }
+
+        dispatch(fetchComposeSuggestions(composeId, match.matchingString.trim()));
+
+        if (!isSelectionOnEntityBoundary(editor, match.leadOffset)) {
+          const isRangePositioned = tryToPositionRange(match.leadOffset, range);
+          if (isRangePositioned !== null) {
+            startTransition(() =>
+              openTypeahead({
+                getRect: () => range.getBoundingClientRect(),
+                match,
+              }),
+            );
+            return;
+          }
+        }
+        closeTypeahead();
+      });
+    };
+
+    const removeUpdateListener = editor.registerUpdateListener(updateListener);
+
+    return () => {
+      removeUpdateListener();
+    };
+  }, [
+    editor,
+    resolution,
+    closeTypeahead,
+    openTypeahead,
+  ]);
+
+  useEffect(() => {
+    if (suggestions && suggestions.size > 0) setSuggestionsHidden(false);
+  }, [suggestions]);
+
+  useEffect(() => {
+    if (resolution !== null && !suggestionsHidden && !suggestions.isEmpty()) {
+      const handleClick = (event: MouseEvent) => {
+        const target = event.target as HTMLElement;
+
+        if (!editor._rootElement?.contains(target) && !anchorElementRef.current.contains(target)) {
+          setResolution(null);
+        }
+      };
+      document.addEventListener('click', handleClick);
+
+      return () => document.removeEventListener('click', handleClick);
+    }
+  }, [resolution, suggestionsHidden, suggestions.isEmpty()]);
+
+  useEffect(() => {
+    if (resolution === null) return;
+
+    return mergeRegister(
+      editor.registerCommand<KeyboardEvent>(
+        KEY_ARROW_UP_COMMAND,
+        (payload) => {
+          const event = payload;
+          if (suggestions !== null && suggestions.size && selectedSuggestion !== null) {
+            const newSelectedSuggestion = selectedSuggestion !== 0 ? selectedSuggestion - 1 : suggestions.size - 1;
+            setSelectedSuggestion(newSelectedSuggestion);
+            event.preventDefault();
+            event.stopImmediatePropagation();
+          }
+          return true;
+        },
+        COMMAND_PRIORITY_LOW,
+      ),
+      editor.registerCommand<KeyboardEvent>(
+        KEY_ARROW_DOWN_COMMAND,
+        (payload) => {
+          const event = payload;
+          if (suggestions !== null && suggestions.size && selectedSuggestion !== null) {
+            const newSelectedSuggestion = selectedSuggestion !== suggestions.size - 1 ? selectedSuggestion + 1 : 0;
+            setSelectedSuggestion(newSelectedSuggestion);
+            event.preventDefault();
+            event.stopImmediatePropagation();
+          }
+          return true;
+        },
+        COMMAND_PRIORITY_LOW,
+      ),
+      editor.registerCommand<KeyboardEvent>(
+        KEY_TAB_COMMAND,
+        (payload) => {
+          const event = payload;
+          event.preventDefault();
+          event.stopImmediatePropagation();
+          onSelectSuggestion(selectedSuggestion);
+          setResolution(null);
+          return true;
+        },
+        COMMAND_PRIORITY_LOW,
+      ),
+      editor.registerCommand<KeyboardEvent>(
+        KEY_ENTER_COMMAND,
+        (payload) => {
+          const event = payload;
+          event.preventDefault();
+          event.stopImmediatePropagation();
+          onSelectSuggestion(selectedSuggestion);
+          setResolution(null);
+          return true;
+        },
+        COMMAND_PRIORITY_LOW,
+      ),
+      editor.registerCommand<KeyboardEvent>(
+        KEY_ESCAPE_COMMAND,
+        (payload) => {
+          const event = payload;
+          event.preventDefault();
+          event.stopImmediatePropagation();
+          setResolution(null);
+          return true;
+        },
+        COMMAND_PRIORITY_LOW,
+      ),
+    );
+  }, [editor, suggestions, selectedSuggestion, resolution]);
+
+  return resolution === null || editor === null ? null : (
+    <LexicalPopoverMenu
+      anchorElementRef={anchorElementRef}
+      menuRenderFn={(anchorElementRef) =>
+        anchorElementRef.current
+          ? ReactDOM.createPortal(
+            <div
+              className={clsx({
+                'mt-6 fixed z-1000 shadow bg-white dark:bg-gray-900 rounded-lg py-1 space-y-0 dark:ring-2 dark:ring-primary-700 focus:outline-none': true,
+                hidden: suggestionsHidden || suggestions.isEmpty(),
+                block: !suggestionsHidden && !suggestions.isEmpty(),
+              })}
+            >
+              {suggestions.map(renderSuggestion)}
+            </div>,
+            anchorElementRef.current,
+          )
+          : null
+      }
+    />
+  );
+};
+
+export default AutosuggestPlugin;

src/features/compose/editor/plugins/focus-plugin.tsx

@@ -0,0 +1,38 @@
+import { useLexicalComposerContext } from '@lexical/react/LexicalComposerContext';
+import { COMMAND_PRIORITY_NORMAL, createCommand, type LexicalCommand } from 'lexical';
+import { useEffect } from 'react';
+
+interface IFocusPlugin {
+  autoFocus?: boolean
+}
+
+export const FOCUS_EDITOR_COMMAND: LexicalCommand<void> = createCommand();
+
+const FocusPlugin: React.FC<IFocusPlugin> = ({ autoFocus }) => {
+  const [editor] = useLexicalComposerContext();
+
+  const focus = () => {
+    editor.dispatchCommand(FOCUS_EDITOR_COMMAND, undefined);
+  };
+
+  useEffect(() => editor.registerCommand(FOCUS_EDITOR_COMMAND, () => {
+    editor.focus(
+      () => {
+        const activeElement = document.activeElement;
+        const rootElement = editor.getRootElement();
+        if (rootElement !== null && (activeElement === null || !rootElement.contains(activeElement))) {
+          rootElement.focus({ preventScroll: true });
+        }
+      }, { defaultSelection: 'rootEnd' },
+    );
+    return true;
+  }, COMMAND_PRIORITY_NORMAL));
+
+  useEffect(() => {
+    if (autoFocus) focus();
+  }, []);
+
+  return null;
+};
+
+export default FocusPlugin;

src/features/compose/editor/plugins/link-plugin.tsx

@@ -0,0 +1,16 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+import { LinkPlugin as LexicalLinkPlugin } from '@lexical/react/LexicalLinkPlugin';
+import * as React from 'react';
+
+import { validateUrl } from '../utils/url';
+
+const LinkPlugin = (): JSX.Element => {
+  return <LexicalLinkPlugin validateUrl={validateUrl} />;
+};
+
+export default LinkPlugin;

src/features/compose/editor/plugins/mention-plugin.tsx

@@ -0,0 +1,60 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+import { useLexicalComposerContext } from '@lexical/react/LexicalComposerContext';
+import { useLexicalTextEntity } from '@lexical/react/useLexicalTextEntity';
+import { useCallback, useEffect } from 'react';
+
+import { $createMentionNode, MentionNode } from '../nodes/mention-node';
+
+import type { TextNode } from 'lexical';
+
+const MENTION_REGEX = new RegExp('(^|$|(?:^|\\s))([@])([a-z\\d_-]+(?:@[^@\\s]+)?)', 'i');
+
+const getMentionMatch = (text: string) => {
+  const matchArr = MENTION_REGEX.exec(text);
+
+  if (!matchArr) return null;
+  return matchArr;
+};
+
+const MentionPlugin = (): JSX.Element | null => {
+  const [editor] = useLexicalComposerContext();
+
+  useEffect(() => {
+    if (!editor.hasNodes([MentionNode])) {
+      throw new Error('MentionPlugin: MentionNode not registered on editor');
+    }
+  }, [editor]);
+
+  const createMentionNode = useCallback((textNode: TextNode): MentionNode => {
+    return $createMentionNode(textNode.getTextContent());
+  }, []);
+
+  const getEntityMatch = useCallback((text: string) => {
+    const matchArr = getMentionMatch(text);
+
+    if (!matchArr) return null;
+
+    const mentionLength = matchArr[3].length + 1;
+    const startOffset = matchArr.index + matchArr[1].length;
+    const endOffset = startOffset + mentionLength;
+    return {
+      end: endOffset,
+      start: startOffset,
+    };
+  }, []);
+
+  useLexicalTextEntity<MentionNode>(
+    getEntityMatch,
+    MentionNode,
+    createMentionNode,
+  );
+
+  return null;
+};
+
+export default MentionPlugin;

src/features/compose/editor/plugins/ref-plugin.tsx

@@ -0,0 +1,18 @@
+import { useLexicalComposerContext } from '@lexical/react/LexicalComposerContext';
+import { LexicalEditor } from 'lexical';
+import React, { useEffect } from 'react';
+
+/** Set the ref to the current Lexical editor instance. */
+const RefPlugin = React.forwardRef<LexicalEditor>((_props, ref) => {
+  const [editor] = useLexicalComposerContext();
+
+  useEffect(() => {
+    if (ref && typeof ref !== 'function') {
+      ref.current = editor;
+    }
+  }, [editor]);
+
+  return null;
+});
+
+export default RefPlugin;

src/features/compose/editor/plugins/state-plugin.tsx

@@ -0,0 +1,35 @@
+import { useLexicalComposerContext } from '@lexical/react/LexicalComposerContext';
+import { $getRoot, KEY_ENTER_COMMAND } from 'lexical';
+import { useEffect } from 'react';
+
+import { setEditorState } from 'soapbox/actions/compose';
+import { useAppDispatch } from 'soapbox/hooks';
+
+interface IStatePlugin {
+  composeId: string
+  handleSubmit?: () => void
+}
+
+const StatePlugin = ({ composeId, handleSubmit }: IStatePlugin) => {
+  const dispatch = useAppDispatch();
+  const [editor] = useLexicalComposerContext();
+
+  useEffect(() => {
+    if (handleSubmit) editor.registerCommand(KEY_ENTER_COMMAND, (event) => {
+      if (event?.ctrlKey) {
+        handleSubmit();
+        return true;
+      }
+      return false;
+    }, 1);
+    editor.registerUpdateListener(({ editorState }) => {
+      const isEmpty = editorState.read(() => $getRoot().getTextContent()) === '';
+      const data = isEmpty ? null : JSON.stringify(editorState.toJSON());
+      dispatch(setEditorState(composeId, data));
+    });
+  }, [editor]);
+
+  return null;
+};
+
+export default StatePlugin;

src/features/compose/editor/utils/get-dom-range-rect.ts

@@ -0,0 +1,28 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+/* eslint-disable eqeqeq */
+
+export const getDOMRangeRect = (
+  nativeSelection: Selection,
+  rootElement: HTMLElement,
+): DOMRect => {
+  const domRange = nativeSelection.getRangeAt(0);
+
+  let rect;
+
+  if (nativeSelection.anchorNode === rootElement) {
+    let inner = rootElement;
+    while (inner.firstElementChild != null) {
+      inner = inner.firstElementChild as HTMLElement;
+    }
+    rect = inner.getBoundingClientRect();
+  } else {
+    rect = domRange.getBoundingClientRect();
+  }
+
+  return rect;
+};

src/features/compose/editor/utils/get-selected-node.ts

@@ -0,0 +1,26 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+import { $isAtNodeEnd } from '@lexical/selection';
+import { ElementNode, RangeSelection, TextNode } from 'lexical';
+
+export const getSelectedNode = (
+  selection: RangeSelection,
+): TextNode | ElementNode =>  {
+  const anchor = selection.anchor;
+  const focus = selection.focus;
+  const anchorNode = selection.anchor.getNode();
+  const focusNode = selection.focus.getNode();
+  if (anchorNode === focusNode) {
+    return anchorNode;
+  }
+  const isBackward = selection.isBackward();
+  if (isBackward) {
+    return $isAtNodeEnd(focus) ? anchorNode : focusNode;
+  } else {
+    return $isAtNodeEnd(anchor) ? focusNode : anchorNode;
+  }
+};

src/features/compose/editor/utils/is-html-element.ts

@@ -0,0 +1,4 @@
+const isHTMLElement = (x: unknown): x is HTMLElement => x instanceof HTMLElement;
+
+export default isHTMLElement;
+export { isHTMLElement };

src/features/compose/editor/utils/point.ts

@@ -0,0 +1,57 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+class Point {
+
+  private readonly _x: number;
+  private readonly _y: number;
+
+  constructor(x: number, y: number) {
+    this._x = x;
+    this._y = y;
+  }
+
+  get x(): number {
+    return this._x;
+  }
+
+  get y(): number {
+    return this._y;
+  }
+
+  public equals({ x, y }: Point): boolean {
+    return this.x === x && this.y === y;
+  }
+
+  public calcDeltaXTo({ x }: Point): number {
+    return this.x - x;
+  }
+
+  public calcDeltaYTo({ y }: Point): number {
+    return this.y - y;
+  }
+
+  public calcHorizontalDistanceTo(point: Point): number {
+    return Math.abs(this.calcDeltaXTo(point));
+  }
+
+  public calcVerticalDistance(point: Point): number {
+    return Math.abs(this.calcDeltaYTo(point));
+  }
+
+  public calcDistanceTo(point: Point): number {
+    return Math.sqrt(
+      Math.pow(this.calcDeltaXTo(point), 2) +
+        Math.pow(this.calcDeltaYTo(point), 2),
+    );
+  }
+
+}
+
+const isPoint = (x: unknown): x is Point => x instanceof Point;
+
+export default Point;
+export { Point, isPoint };

src/features/compose/editor/utils/rect.ts

@@ -0,0 +1,163 @@
+/* eslint-disable no-dupe-class-members */
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+import { isPoint, Point } from './point';
+
+type ContainsPointReturn = {
+  result: boolean
+  reason: {
+    isOnTopSide: boolean
+    isOnBottomSide: boolean
+    isOnLeftSide: boolean
+    isOnRightSide: boolean
+  }
+};
+
+class Rect {
+
+  private readonly _left: number;
+  private readonly _top: number;
+  private readonly _right: number;
+  private readonly _bottom: number;
+
+  constructor(left: number, top: number, right: number, bottom: number) {
+    const [physicTop, physicBottom] =
+      top <= bottom ? [top, bottom] : [bottom, top];
+
+    const [physicLeft, physicRight] =
+      left <= right ? [left, right] : [right, left];
+
+    this._top = physicTop;
+    this._right = physicRight;
+    this._left = physicLeft;
+    this._bottom = physicBottom;
+  }
+
+  get top(): number {
+    return this._top;
+  }
+
+  get right(): number {
+    return this._right;
+  }
+
+  get bottom(): number {
+    return this._bottom;
+  }
+
+  get left(): number {
+    return this._left;
+  }
+
+  get width(): number {
+    return Math.abs(this._left - this._right);
+  }
+
+  get height(): number {
+    return Math.abs(this._bottom - this._top);
+  }
+
+  public equals({ top, left, bottom, right }: Rect): boolean {
+    return (
+      top === this._top &&
+      bottom === this._bottom &&
+      left === this._left &&
+      right === this._right
+    );
+  }
+
+  public contains({ x, y }: Point): ContainsPointReturn;
+  public contains({ top, left, bottom, right }: Rect): boolean;
+  public contains(target: Point | Rect): boolean | ContainsPointReturn {
+    if (isPoint(target)) {
+      const { x, y } = target;
+
+      const isOnTopSide = y < this._top;
+      const isOnBottomSide = y > this._bottom;
+      const isOnLeftSide = x < this._left;
+      const isOnRightSide = x > this._right;
+
+      const result =
+        !isOnTopSide && !isOnBottomSide && !isOnLeftSide && !isOnRightSide;
+
+      return {
+        reason: {
+          isOnBottomSide,
+          isOnLeftSide,
+          isOnRightSide,
+          isOnTopSide,
+        },
+        result,
+      };
+    } else {
+      const { top, left, bottom, right } = target;
+
+      return (
+        top >= this._top &&
+        top <= this._bottom &&
+        bottom >= this._top &&
+        bottom <= this._bottom &&
+        left >= this._left &&
+        left <= this._right &&
+        right >= this._left &&
+        right <= this._right
+      );
+    }
+  }
+
+  public intersectsWith(rect: Rect): boolean {
+    const { left: x1, top: y1, width: w1, height: h1 } = rect;
+    const { left: x2, top: y2, width: w2, height: h2 } = this;
+    const maxX = x1 + w1 >= x2 + w2 ? x1 + w1 : x2 + w2;
+    const maxY = y1 + h1 >= y2 + h2 ? y1 + h1 : y2 + h2;
+    const minX = x1 <= x2 ? x1 : x2;
+    const minY = y1 <= y2 ? y1 : y2;
+    return maxX - minX <= w1 + w2 && maxY - minY <= h1 + h2;
+  }
+
+  public generateNewRect({
+    left = this.left,
+    top = this.top,
+    right = this.right,
+    bottom = this.bottom,
+  }): Rect {
+    return new Rect(left, top, right, bottom);
+  }
+
+  static fromLTRB(
+    left: number,
+    top: number,
+    right: number,
+    bottom: number,
+  ): Rect {
+    return new Rect(left, top, right, bottom);
+  }
+
+  static fromLWTH(
+    left: number,
+    width: number,
+    top: number,
+    height: number,
+  ): Rect {
+    return new Rect(left, top, left + width, top + height);
+  }
+
+  static fromPoints(startPoint: Point, endPoint: Point): Rect {
+    const { y: top, x: left } = startPoint;
+    const { y: bottom, x: right } = endPoint;
+    return Rect.fromLTRB(left, top, right, bottom);
+  }
+
+  static fromDOM(dom: HTMLElement): Rect {
+    const { top, width, left, height } = dom.getBoundingClientRect();
+    return Rect.fromLWTH(left, width, top, height);
+  }
+
+}
+
+export default Rect;
+export { Rect };

src/features/compose/editor/utils/set-floating-elem-position.ts

@@ -0,0 +1,45 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+const VERTICAL_GAP = 10;
+const HORIZONTAL_OFFSET = 5;
+
+export const setFloatingElemPosition = (
+  targetRect: ClientRect | null,
+  floatingElem: HTMLElement,
+  anchorElem: HTMLElement,
+  verticalGap: number = VERTICAL_GAP,
+  horizontalOffset: number = HORIZONTAL_OFFSET,
+): void => {
+  const scrollerElem = anchorElem.parentElement;
+
+  if (targetRect === null || !scrollerElem) {
+    floatingElem.style.opacity = '0';
+    floatingElem.style.transform = 'translate(-10000px, -10000px)';
+    return;
+  }
+
+  const floatingElemRect = floatingElem.getBoundingClientRect();
+  const anchorElementRect = anchorElem.getBoundingClientRect();
+  const editorScrollerRect = scrollerElem.getBoundingClientRect();
+
+  let top = targetRect.top - floatingElemRect.height - verticalGap;
+  let left = targetRect.left - horizontalOffset;
+
+  if (top < editorScrollerRect.top) {
+    top += floatingElemRect.height + targetRect.height + verticalGap * 2;
+  }
+
+  if (left + floatingElemRect.width > editorScrollerRect.right) {
+    left = editorScrollerRect.right - floatingElemRect.width - horizontalOffset;
+  }
+
+  top -= anchorElementRect.top;
+  left -= anchorElementRect.left;
+
+  floatingElem.style.opacity = '1';
+  floatingElem.style.transform = `translate(${left}px, ${top}px)`;
+};

src/features/compose/editor/utils/url.ts

@@ -0,0 +1,32 @@
+/**
+ * This source code is derived from code from Meta Platforms, Inc.
+ * and affiliates, licensed under the MIT license located in the
+ * LICENSE file in the /app/soapbox/features/compose/editor directory.
+ */
+
+export const sanitizeUrl = (url: string): string => {
+  /** A pattern that matches safe  URLs. */
+  const SAFE_URL_PATTERN =
+    /^(?:(?:https?|mailto|ftp|tel|file|sms):|[^&:/?#]*(?:[/?#]|$))/gi;
+
+  /** A pattern that matches safe data URLs. */
+  const DATA_URL_PATTERN =
+    /^data:(?:image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\/(?:mpeg|mp4|ogg|webm)|audio\/(?:mp3|oga|ogg|opus));base64,[a-z0-9+/]+=*$/i;
+
+  url = String(url).trim();
+
+  if (url.match(SAFE_URL_PATTERN) || url.match(DATA_URL_PATTERN)) return url;
+
+  return 'https://';
+};
+
+// Source: https://stackoverflow.com/a/8234912/2013580
+const urlRegExp = new RegExp(
+  /((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=+$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=+$,\w]+@)[A-Za-z0-9.-]+)((?:\/[+~%/.\w-_]*)?\??(?:[-+=&;%@.\w_]*)#?(?:[\w]*))?)/,
+);
+
+export const validateUrl = (url: string): boolean => {
+  // TODO Fix UI for link insertion; it should never default to an invalid URL such as https://.
+  // Maybe show a dialog where they user can type the URL before inserting it.
+  return url === 'https://' || urlRegExp.test(url);
+};

src/features/developers/settings-store.tsx

@@ -98,7 +98,7 @@ const SettingsStore: React.FC = () => {
         </FormActions>
       </Form>
 
-      <CardHeader>
+      <CardHeader className='mb-4'>
         <CardTitle title={intl.formatMessage(messages.advanced)} />
       </CardHeader>
 

src/features/emoji/containers/emoji-picker-dropdown-container.tsx

@@ -75,5 +75,4 @@ const EmojiPickerDropdownContainer = (
   );
 };
 
-
 export default EmojiPickerDropdownContainer;

src/features/emoji/mapping.ts

@@ -1,11 +1,6 @@
 import data, { EmojiData } from './data';
 
 const stripLeadingZeros = /^0+/;
-
-function replaceAll(str: string, find: string, replace: string) {
-  return str.replace(new RegExp(find, 'g'), replace);
-}
-
 interface UnicodeMap {
   [s: string]: {
     unified: string
@@ -80,7 +75,7 @@ const stripcodes = (unified: string, native: string) => {
   if (unified.includes('200d') && !(unified in blacklist)) {
     return stripped;
   } else {
-    return replaceAll(stripped, '-fe0f', '');
+    return stripped.replaceAll('-fe0f', '');
   }
 };
 

src/features/event/components/event-header.tsx

@@ -109,7 +109,7 @@ const EventHeader: React.FC<IEventHeader> = ({ status }) => {
   };
 
   const handleCopy = () => {
-    const { uri }  = status;
+    const { uri } = status;
 
     copy(uri);
   };

src/features/soapbox-config/components/icon-picker-menu.tsx

@@ -11,7 +11,6 @@ const messages = defineMessages({
 
 const listenerOptions = supportsPassiveEvents ? { passive: true } : false;
 
-
 interface IIconPickerMenu {
   icons: Record<string, Array<string>>
   onClose: () => void

src/features/ui/components/modals/compose-event-modal/compose-event-modal.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect, useState } from 'react';
+import React, { useEffect, useRef, useState } from 'react';
 import { defineMessages, FormattedMessage, useIntl } from 'react-intl';
 
 import {
@@ -21,11 +21,11 @@ import { closeModal, openModal } from 'soapbox/actions/modals';
 import { ADDRESS_ICONS } from 'soapbox/components/autosuggest-location';
 import LocationSearch from 'soapbox/components/location-search';
 import { checkEventComposeContent } from 'soapbox/components/modal-root';
-import { Button, Form, FormGroup, HStack, Icon, IconButton, Input, Modal, Spinner, Stack, Tabs, Text, Textarea, Toggle } from 'soapbox/components/ui';
+import { Button, Form, FormGroup, HStack, Icon, IconButton, Input, Modal, Spinner, Stack, Tabs, Text, Toggle } from 'soapbox/components/ui';
 import AccountContainer from 'soapbox/containers/account-container';
 import { isCurrentOrFutureDate } from 'soapbox/features/compose/components/schedule-form';
 import BundleContainer from 'soapbox/features/ui/containers/bundle-container';
-import { DatePicker } from 'soapbox/features/ui/util/async-components';
+import { ComposeEditor, DatePicker } from 'soapbox/features/ui/util/async-components';
 import { useAppDispatch, useAppSelector } from 'soapbox/hooks';
 
 import UploadButton from './upload-button';
@@ -94,13 +94,14 @@ const ComposeEventModal: React.FC<IComposeEventModal> = ({ onClose }) => {
   const intl = useIntl();
   const dispatch = useAppDispatch();
 
+  const editorStateRef = useRef<string>(null);
+
   const [tab, setTab] = useState<'edit' | 'pending'>('edit');
 
   const banner = useAppSelector((state) => state.compose_event.banner);
   const isUploading = useAppSelector((state) => state.compose_event.is_uploading);
 
   const name = useAppSelector((state) => state.compose_event.name);
-  const description = useAppSelector((state) => state.compose_event.status);
   const startTime = useAppSelector((state) => state.compose_event.start_time);
   const endTime = useAppSelector((state) => state.compose_event.end_time);
   const approvalRequired = useAppSelector((state) => state.compose_event.approval_required);
@@ -114,10 +115,6 @@ const ComposeEventModal: React.FC<IComposeEventModal> = ({ onClose }) => {
     dispatch(changeEditEventName(target.value));
   };
 
-  const onChangeDescription: React.ChangeEventHandler<HTMLTextAreaElement> = ({ target }) => {
-    dispatch(changeEditEventDescription(target.value));
-  };
-
   const onChangeStartTime = (date: Date) => {
     dispatch(changeEditEventStartTime(date));
   };
@@ -170,6 +167,7 @@ const ComposeEventModal: React.FC<IComposeEventModal> = ({ onClose }) => {
   };
 
   const handleSubmit = () => {
+    dispatch(changeEditEventDescription(editorStateRef.current!));
     dispatch(submitEvent());
   };
 
@@ -236,14 +234,19 @@ const ComposeEventModal: React.FC<IComposeEventModal> = ({ onClose }) => {
       </FormGroup>
       <FormGroup
         labelText={<FormattedMessage id='compose_event.fields.description_label' defaultMessage='Event description' />}
-        hintText={<FormattedMessage id='compose_event.fields.description_hint' defaultMessage='Markdown syntax is supported' />}
       >
-        <Textarea
+        <BundleContainer fetchComponent={ComposeEditor}>
-          autoComplete='off'
+          {(Component: any) => (
-          placeholder={intl.formatMessage(messages.eventDescriptionPlaceholder)}
+            <Component
-          value={description}
+              ref={editorStateRef}
-          onChange={onChangeDescription}
+              className='block w-full rounded-md border border-gray-400 bg-white px-3 py-2 text-base text-gray-900 ring-1 placeholder:text-gray-600 focus-within:border-primary-500 focus-within:ring-primary-500 dark:border-gray-800 dark:bg-gray-900 dark:text-gray-100 dark:ring-gray-800 dark:placeholder:text-gray-600 dark:focus-within:border-primary-500 dark:focus-within:ring-primary-500 sm:text-sm'
-        />
+              placeholderClassName='pt-2'
+              composeId='compose-event-modal'
+              placeholder={intl.formatMessage(messages.eventDescriptionPlaceholder)}
+              handleSubmit={handleSubmit}
+            />
+          )}
+        </BundleContainer>
       </FormGroup>
       <FormGroup
         labelText={<FormattedMessage id='compose_event.fields.location_label' defaultMessage='Event location' />}

src/features/ui/components/modals/compose-modal.tsx

@@ -86,6 +86,7 @@ const ComposeModal: React.FC<IComposeModal> = ({ onClose, composeId = 'compose-m
       <ComposeForm
         id={composeId}
         extra={<ComposeFormGroupToggle composeId={composeId} groupId={groupId} />}
+        autoFocus
       />
     </Modal>
   );

src/features/ui/components/modals/report-modal/report-modal.tsx

@@ -27,8 +27,8 @@ const messages = defineMessages({
   reportContext: { id: 'report.chatMessage.context', defaultMessage: 'When reporting a user’s message, the five messages before and five messages after the one selected will be passed along to our moderation team for context.' },
   reportMessage: { id: 'report.chatMessage.title', defaultMessage: 'Report message' },
   reportGroup: { id: 'report.group.title', defaultMessage: 'Report Group' },
-  cancel: {  id: 'common.cancel', defaultMessage: 'Cancel' },
+  cancel: { id: 'common.cancel', defaultMessage: 'Cancel' },
-  previous: {  id: 'report.previous', defaultMessage: 'Previous' },
+  previous: { id: 'report.previous', defaultMessage: 'Previous' },
 });
 
 enum Steps {

src/features/ui/util/async-components.ts

@@ -641,3 +641,7 @@ export function FollowedTags() {
 export function AccountNotePanel() {
   return import('../components/panels/account-note-panel');
 }
+
+export function ComposeEditor() {
+  return import('../../compose/editor');
+}

src/features/ui/util/global-hotkeys.tsx

@@ -3,10 +3,13 @@ import { useHistory } from 'react-router-dom';
 
 import { resetCompose } from 'soapbox/actions/compose';
 import { openModal } from 'soapbox/actions/modals';
+import { FOCUS_EDITOR_COMMAND } from 'soapbox/features/compose/editor/plugins/focus-plugin';
 import { useAppSelector, useAppDispatch, useOwnAccount } from 'soapbox/hooks';
 
 import { HotKeys } from '../components/hotkeys';
 
+import type { LexicalEditor } from 'lexical';
+
 const keyMap = {
   help: '?',
   new: 'n',
@@ -51,10 +54,10 @@ const GlobalHotkeys: React.FC<IGlobalHotkeys> = ({ children, node }) => {
   const handleHotkeyNew = (e?: KeyboardEvent) => {
     e?.preventDefault();
 
-    const element = node.current?.querySelector('textarea#compose-textarea') as HTMLTextAreaElement;
+    const element = node.current?.querySelector('div[data-lexical-editor="true"]') as HTMLTextAreaElement;
 
     if (element) {
-      element.focus();
+      ((element as any).__lexicalEditor as LexicalEditor).dispatchCommand(FOCUS_EDITOR_COMMAND, undefined);
     } else {
       dispatch(openModal('COMPOSE'));
     }
@@ -91,7 +94,7 @@ const GlobalHotkeys: React.FC<IGlobalHotkeys> = ({ children, node }) => {
 
     // @ts-ignore
     hotkeys.current.__mousetrap__.stopCallback = (_e, element) => {
-      return ['TEXTAREA', 'SELECT', 'INPUT', 'EM-EMOJI-PICKER'].includes(element.tagName);
+      return ['TEXTAREA', 'SELECT', 'INPUT', 'EM-EMOJI-PICKER'].includes(element.tagName) || !!element.closest('[contenteditable]');
     };
   };
 

src/locales/en.json

@@ -394,7 +394,6 @@
   "compose_event.edit_success": "Your event was edited",
   "compose_event.fields.approval_required": "I want to approve participation requests manually",
   "compose_event.fields.banner_label": "Event banner",
-  "compose_event.fields.description_hint": "Markdown syntax is supported",
   "compose_event.fields.description_label": "Event description",
   "compose_event.fields.description_placeholder": "Description",
   "compose_event.fields.end_time_label": "Event end date",
@@ -418,6 +417,14 @@
   "compose_form.direct_message_warning": "This post will only be sent to the mentioned users.",
   "compose_form.event_placeholder": "Post to this event",
   "compose_form.hashtag_warning": "This post won't be listed under any hashtag as it is unlisted. Only public posts can be searched by hashtag.",
+  "compose_form.lexical.create_horizontal_line": "Create horizontal line",
+  "compose_form.lexical.format_bold": "Format bold",
+  "compose_form.lexical.format_italic": "Format italic",
+  "compose_form.lexical.format_strikethrough": "Format strikethrough",
+  "compose_form.lexical.format_underline": "Format underline",
+  "compose_form.lexical.insert_code_block": "Insert code block",
+  "compose_form.lexical.insert_link": "Insert link",
+  "compose_form.lexical.upload_media": "Upload media",
   "compose_form.lock_disclaimer": "Your account is not {locked}. Anyone can follow you to view your follower-only posts.",
   "compose_form.lock_disclaimer.lock": "locked",
   "compose_form.markdown.marked": "Post markdown enabled",

src/normalizers/group.ts

@@ -140,7 +140,6 @@ const normalizeLocked = (group: ImmutableMap<string, any>) => {
   return group.set('locked', locked);
 };
 
-
 /** Rewrite `<p></p>` to empty string. */
 const fixNote = (group: ImmutableMap<string, any>) => {
   if (group.get('note') === '<p></p>') {

src/reducers/__tests__/compose.test.ts

@@ -374,7 +374,7 @@ describe('compose reducer', () => {
       type: actions.COMPOSE_SUGGESTION_TAGS_UPDATE,
       id: 'home',
       token: 'aaadken3',
-      currentTrends: ImmutableList([
+      tags: ImmutableList([
         TagRecord({ name: 'hashtag' }),
       ]),
     };

src/reducers/compose.ts

@@ -51,9 +51,11 @@ import {
   COMPOSE_REMOVE_FROM_MENTIONS,
   COMPOSE_SET_STATUS,
   COMPOSE_EVENT_REPLY,
+  COMPOSE_EDITOR_STATE_SET,
   COMPOSE_SET_GROUP_TIMELINE_VISIBLE,
   ComposeAction,
 } from '../actions/compose';
+import { EVENT_COMPOSE_CANCEL, EVENT_FORM_SET, type EventsAction } from '../actions/events';
 import { ME_FETCH_SUCCESS, ME_PATCH_SUCCESS, MeAction } from '../actions/me';
 import { SETTING_CHANGE, FE_NAME, SettingsAction } from '../actions/settings';
 import { TIMELINE_DELETE, TimelineAction } from '../actions/timelines';
@@ -80,6 +82,7 @@ const PollRecord = ImmutableRecord({
 export const ReducerCompose = ImmutableRecord({
   caretPosition: null as number | null,
   content_type: 'text/plain',
+  editorState: null as string | null,
   focusDate: null as Date | null,
   group_id: null as string | null,
   idempotencyKey: '',
@@ -180,11 +183,11 @@ const insertSuggestion = (compose: Compose, position: number, token: string | nu
   });
 };
 
-const updateSuggestionTags = (compose: Compose, token: string, currentTrends: ImmutableList<Tag>) => {
+const updateSuggestionTags = (compose: Compose, token: string, tags: ImmutableList<Tag>) => {
   const prefix = token.slice(1);
 
   return compose.merge({
-    suggestions: ImmutableList(currentTrends
+    suggestions: ImmutableList(tags
       .filter((tag) => tag.get('name').toLowerCase().startsWith(prefix.toLowerCase()))
       .slice(0, 4)
       .map((tag) => '#' + tag.name)),
@@ -273,7 +276,7 @@ export const initialState: State = ImmutableMap({
   default: ReducerCompose({ idempotencyKey: uuid(), resetFileKey: getResetFileKey() }),
 });
 
-export default function compose(state = initialState, action: ComposeAction | MeAction | SettingsAction | TimelineAction) {
+export default function compose(state = initialState, action: ComposeAction | EventsAction | MeAction | SettingsAction | TimelineAction) {
   switch (action.type) {
     case COMPOSE_TYPE_CHANGE:
       return updateCompose(state, action.id, compose => compose.withMutations(map => {
@@ -409,7 +412,7 @@ export default function compose(state = initialState, action: ComposeAction | Me
     case COMPOSE_SUGGESTION_SELECT:
       return updateCompose(state, action.id, compose => insertSuggestion(compose, action.position, action.token, action.completion, action.path));
     case COMPOSE_SUGGESTION_TAGS_UPDATE:
-      return updateCompose(state, action.id, compose => updateSuggestionTags(compose, action.token, action.currentTrends));
+      return updateCompose(state, action.id, compose => updateSuggestionTags(compose, action.token, action.tags));
     case COMPOSE_TAG_HISTORY_UPDATE:
       return updateCompose(state, action.id, compose => compose.set('tagHistory', ImmutableList(fromJS(action.tags)) as ImmutableList<string>));
     case TIMELINE_DELETE:
@@ -511,6 +514,12 @@ export default function compose(state = initialState, action: ComposeAction | Me
       return updateCompose(state, 'default', compose => importAccount(compose, action.me));
     case SETTING_CHANGE:
       return updateCompose(state, 'default', compose => updateSetting(compose, action.path, action.value));
+    case COMPOSE_EDITOR_STATE_SET:
+      return updateCompose(state, action.id, compose => compose.set('editorState', action.editorState as string));
+    case EVENT_COMPOSE_CANCEL:
+      return updateCompose(state, 'event-compose-modal', compose => compose.set('text', ''));
+    case EVENT_FORM_SET:
+      return updateCompose(state, 'event-compose-modal', compose => compose.set('text', action.text));
     default:
       return state;
   }

src/schemas/soapbox/settings.ts

@@ -33,4 +33,4 @@ const settingsSchema = z.object({
 
 type Settings = z.infer<typeof settingsSchema>;
 
-export { settingsSchema, type Settings };
+export { settingsSchema, type Settings };

src/service-worker/sw.ts

@@ -212,7 +212,7 @@ const findBestClient = (clients: readonly WindowClient[]): WindowClient => {
   return focusedClient || visibleClient || clients[0];
 };
 
-/** Update a notification with CW to display the full status.  */
+/** Update a notification with CW to display the full status. */
 const expandNotification = (notification: Notification) => {
   const newNotification = cloneNotification(notification);
 

src/styles/components/compose-form.scss

@@ -50,7 +50,7 @@
     overflow: hidden;
 
     &__actions {
-      @apply bg-gradient-to-b from-gray-900/80 via-gray-900/50 to-transparent flex items-start justify-between opacity-0 transition-opacity duration-100 ease-linear;
+      @apply p-2 bg-gradient-to-b from-gray-900/80 via-gray-900/50 to-transparent flex items-start gap-2 justify-end opacity-0 transition-opacity duration-100 ease-linear;
 
       &.active {
         @apply opacity-100;

src/styles/ui.scss

@@ -120,3 +120,7 @@
   30% { opacity: 0.75; }
   100% { opacity: 1; }
 }
+
+.underline-line-through {
+  text-decoration: underline line-through;
+}

src/utils/scopes.ts

@@ -24,7 +24,6 @@ const getScopes = (state: RootState) => {
   return getInstanceScopes(state.instance);
 };
 
-
 export {
   getInstanceScopes,
   getScopes,

src/utils/suggestions.ts

@@ -32,4 +32,4 @@ const textAtCursorMatchesToken = (
   }
 };
 
-export { textAtCursorMatchesToken };
+export { textAtCursorMatchesToken };

yarn.lock

@@ -1699,6 +1699,160 @@
     "@jridgewell/resolve-uri" "^3.1.0"
     "@jridgewell/sourcemap-codec" "^1.4.14"
 
+"@lexical/clipboard@0.11.3", "@lexical/clipboard@^0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/clipboard/-/clipboard-0.11.3.tgz#f4bfac8fad1f41d43a45c4e1ffc79542757314f9"
+  integrity sha512-6xggT8b0hd4OQy25mBH+yiJsr3Bm8APHjDOd3yINCGeiiHXIC+2qKQn3MG70euxQQuyzq++tYHcSsFq42g8Jyw==
+  dependencies:
+    "@lexical/html" "0.11.3"
+    "@lexical/list" "0.11.3"
+    "@lexical/selection" "0.11.3"
+    "@lexical/utils" "0.11.3"
+
+"@lexical/code@0.11.3", "@lexical/code@^0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/code/-/code-0.11.3.tgz#4a5ef193655557859c63dd4a54012c78580585fa"
+  integrity sha512-BIMPd2op65iP4N9SkKIUVodZoWeSsnk6skNJ8UHBO/Rg0ZxyAqxLpnBhEgHq2QOoTBbEW6OEFtkc7/+f9LINZg==
+  dependencies:
+    "@lexical/utils" "0.11.3"
+    prismjs "^1.27.0"
+
+"@lexical/dragon@0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/dragon/-/dragon-0.11.3.tgz#b4254953b09a68c20277ba0fb125548dd6630921"
+  integrity sha512-S18uwqOOpV2yIAFVWqSvBdhZ5BGadPQO4ejZF15wP8LUuqkxCs+0I/MjLovQ7tx0Cx34KdDaOXtM6XeG74ixYw==
+
+"@lexical/hashtag@0.11.3", "@lexical/hashtag@^0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/hashtag/-/hashtag-0.11.3.tgz#9ffb2f7b2bb9a62fa9641355fc06feb9d209273a"
+  integrity sha512-7auoaWp2QhsX9/Bq0SxLXatUaSwqoT9HlWNTH2vKsw8tdeUBYacTHLuBNncTGrznXLG0/B5+FWoLuM6Pzqq4Ig==
+  dependencies:
+    "@lexical/utils" "0.11.3"
+
+"@lexical/history@0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/history/-/history-0.11.3.tgz#bcf7b2e708a5b3b5f90d1a39e07e0ae51bac41df"
+  integrity sha512-QLJQRH2rbadRwXd4c/U4TqjLWDQna6Q43nCocIZF+SdVG9TlASp7m6dS7hiHfPtV1pkxJUxPhZY6EsB/Ok5WGA==
+  dependencies:
+    "@lexical/utils" "0.11.3"
+
+"@lexical/html@0.11.3", "@lexical/html@^0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/html/-/html-0.11.3.tgz#c02b38f512eb808726922c8215dd2374df6b77cc"
+  integrity sha512-+8AYnxxml9PneZLkGfdTenqDjE2yD1ZfCmQLrD/L1TEn22OjZh4uvKVHb13wEhgUZTuLKF0PNdnuecko9ON/aQ==
+  dependencies:
+    "@lexical/selection" "0.11.3"
+
+"@lexical/link@0.11.3", "@lexical/link@^0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/link/-/link-0.11.3.tgz#7efab94e3b061a84639314eaec0b915d3457329c"
+  integrity sha512-stAjIrDrF18dPKK25ExPwMCcMe0KKD0FWVzo3F7ejh9DvrQcLFeBPcs8ze71chS3D5fQDB/CzdwvMjEViKmq2A==
+  dependencies:
+    "@lexical/utils" "0.11.3"
+
+"@lexical/list@0.11.3", "@lexical/list@^0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/list/-/list-0.11.3.tgz#d158ac4b4b42d772b30a1cd2a42ca0462a5a154e"
+  integrity sha512-Cs9071wDfqi4j1VgodceiR1jTHj13eCoEJDhr3e/FW0x5we7vfbTMtWlOWbveIoryAh+rQNgiD5e8SrAm6Zs3g==
+  dependencies:
+    "@lexical/utils" "0.11.3"
+
+"@lexical/mark@0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/mark/-/mark-0.11.3.tgz#7f87a264d44762e275ba7b3d85e18307bbabd9e3"
+  integrity sha512-0wAtufmaA0rMVFXoiJ0sY/tiJsQbHuDpgywb1Qa8qnZZcg7ZTrQMz9Go0fEWYcbSp8OH2o0cjbDTz3ACS1qCUA==
+  dependencies:
+    "@lexical/utils" "0.11.3"
+
+"@lexical/markdown@0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/markdown/-/markdown-0.11.3.tgz#0656a33bdf8b506899c010bb44960f86276e346b"
+  integrity sha512-sF8ow32BDme3UvxaKpf+j+vMc4T/XvDEzteZHmvvP7NX/iUtK3yUkTyT7rKuGwiKLYfMBwQaKMGjU3/nlIOzUg==
+  dependencies:
+    "@lexical/code" "0.11.3"
+    "@lexical/link" "0.11.3"
+    "@lexical/list" "0.11.3"
+    "@lexical/rich-text" "0.11.3"
+    "@lexical/text" "0.11.3"
+    "@lexical/utils" "0.11.3"
+
+"@lexical/offset@0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/offset/-/offset-0.11.3.tgz#55c2ef5f036235d70f2aa762ed295e32dde9593a"
+  integrity sha512-3H9X8iqDSk0LrMOHZuqYuqX4EYGb78TIhtjrFbLJi/OgKmHaSeLx59xcMZdgd5kBdRitzQYMmvbRDvbLfMgWrA==
+
+"@lexical/overflow@0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/overflow/-/overflow-0.11.3.tgz#a77d72a4fdf8dcc4f558e68a5d0ac210f020472b"
+  integrity sha512-ShjCG8lICShOBKwrpP+9PjRFKEBCSUUMjbIGZfLnoL//3hyRtGv5aRgRyfJlRgDhCve0ROt5znLJV88EXzGRyA==
+
+"@lexical/plain-text@0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/plain-text/-/plain-text-0.11.3.tgz#ee56c0f0bc10a6333dc9790fb6f27b8d41887da8"
+  integrity sha512-cQ5Us+GNzShyjjgRqWTnYv0rC+jHJ96LvBA1aSieM77H8/Im5BeoLl6TgBK2NqPkp8fGpj8JnDEdT8h9Qh1jtA==
+
+"@lexical/react@^0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/react/-/react-0.11.3.tgz#e889170cf29bf71e3c4799a104d4f4c99499fa2e"
+  integrity sha512-Rn0Agnrz3uLIWbNyS9PRlkxOxcIDl2kxaVfgBacqQtYKR0ZVB2Hnoi89Cq6VmWPovauPyryx4Q3FC8Y11X7Otg==
+  dependencies:
+    "@lexical/clipboard" "0.11.3"
+    "@lexical/code" "0.11.3"
+    "@lexical/dragon" "0.11.3"
+    "@lexical/hashtag" "0.11.3"
+    "@lexical/history" "0.11.3"
+    "@lexical/link" "0.11.3"
+    "@lexical/list" "0.11.3"
+    "@lexical/mark" "0.11.3"
+    "@lexical/markdown" "0.11.3"
+    "@lexical/overflow" "0.11.3"
+    "@lexical/plain-text" "0.11.3"
+    "@lexical/rich-text" "0.11.3"
+    "@lexical/selection" "0.11.3"
+    "@lexical/table" "0.11.3"
+    "@lexical/text" "0.11.3"
+    "@lexical/utils" "0.11.3"
+    "@lexical/yjs" "0.11.3"
+    react-error-boundary "^3.1.4"
+
+"@lexical/rich-text@0.11.3", "@lexical/rich-text@^0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/rich-text/-/rich-text-0.11.3.tgz#9501789bfe9671c220da7e95bf8589fa92cecf8c"
+  integrity sha512-fBFs6wMS7GFLbk+mzIWtwpP+EmnTZZ5bHpveuQ5wXONBuUuLcsYF5KO7UhLxXNLmiViV6lxatZPavEzgZdW7oQ==
+
+"@lexical/selection@0.11.3", "@lexical/selection@^0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/selection/-/selection-0.11.3.tgz#f7250fae305a84c6e264a413f5feab056aeabfa3"
+  integrity sha512-15lQpcKT/vd7XZ5pnF1nb+kpKb72e9Yi1dVqieSxTeXkzt1cAZFKP3NB4RlhOKCv1N+glSBnjSxRwgsFfbD+NQ==
+
+"@lexical/table@0.11.3", "@lexical/table@^0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/table/-/table-0.11.3.tgz#9b1980d828d7a588aaffa4cb8c6bb61401729034"
+  integrity sha512-EyRnN39CSPsMceADBR7Kf+sBHNpNQlPEkn/52epeDSnakR6s80woyrA3kIzKo6mLB4afvoqdYc7RfR96M9JLIA==
+  dependencies:
+    "@lexical/utils" "0.11.3"
+
+"@lexical/text@0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/text/-/text-0.11.3.tgz#81ce2b5cd0caa9d89372e52c3548173d9395ad3d"
+  integrity sha512-gCEN8lJyR6b+yaOwKWGj79pbOfCQPWU/PHWyoNFUkEJXn3KydCzr2EYb6ta2cvQWRQU4G2BClKCR56jL4NS+qg==
+
+"@lexical/utils@0.11.3", "@lexical/utils@^0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/utils/-/utils-0.11.3.tgz#c4eb953289d29943974008c75f80c8d4e294e009"
+  integrity sha512-vC4saCrlcmyIJnvrYKw1uYxZojlD1DCIBsFlgmO8kXyRYXjj+o/8PBdn2dsgSQ3rADrC2mUloOm/maekDcYe9Q==
+  dependencies:
+    "@lexical/list" "0.11.3"
+    "@lexical/selection" "0.11.3"
+    "@lexical/table" "0.11.3"
+
+"@lexical/yjs@0.11.3":
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/@lexical/yjs/-/yjs-0.11.3.tgz#b7049c0be85945fe0766b614256df8121bb05499"
+  integrity sha512-TLDQG2FSEw/aOfppEBb0wRlIuzJ57W//8ImfzyZvckSC12tvU0YKQQX8nQz/rybXdyfRy5eN+8gX5K2EyZx+pQ==
+  dependencies:
+    "@lexical/offset" "0.11.3"
+
 "@mdn/browser-compat-data@^5.2.34", "@mdn/browser-compat-data@^5.3.13":
   version "5.3.16"
   resolved "https://registry.yarnpkg.com/@mdn/browser-compat-data/-/browser-compat-data-5.3.16.tgz#c3b6585c256461fe5e2eac85182b11b36ea2678b"
@@ -5830,6 +5984,11 @@ levn@^0.4.1:
     prelude-ls "^1.2.1"
     type-check "~0.4.0"
 
+lexical@^0.11.3:
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/lexical/-/lexical-0.11.3.tgz#1ad1a56a657eb55d1b9644733f271bf75a65cbe9"
+  integrity sha512-xsMKgx/Fa+QHg/nweemU04lCy7TnEr8LyeDtsKUC7fIDN9wH3GqbnQ0+e3Hbg4FmxlhDCiPPt0GcZAROq3R8uw==
+
 li@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/li/-/li-1.3.0.tgz#22c59bcaefaa9a8ef359cf759784e4bf106aea1b"
@@ -6993,6 +7152,11 @@ pretty-format@^29.5.0:
     ansi-styles "^5.0.0"
     react-is "^18.0.0"
 
+prismjs@^1.27.0:
+  version "1.29.0"
+  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.29.0.tgz#f113555a8fa9b57c35e637bba27509dcf802dd12"
+  integrity sha512-Kx/1w86q/epKcmte75LNrEoT+lX8pBpavuAbvJWRXar7Hz8jrtF+e3vY751p0R8H9HdArwaCTNDDzHg/ScJK1Q==
+
 process@^0.11.10:
   version "0.11.10"
   resolved "https://registry.yarnpkg.com/process/-/process-0.11.10.tgz#7332300e840161bda3e69a1d1d91a7d4bc16f182"
@@ -7127,7 +7291,7 @@ react-dom@^18.0.0:
     loose-envify "^1.1.0"
     scheduler "^0.23.0"
 
-react-error-boundary@^3.1.0:
+react-error-boundary@^3.1.0, react-error-boundary@^3.1.4:
   version "3.1.4"
   resolved "https://registry.yarnpkg.com/react-error-boundary/-/react-error-boundary-3.1.4.tgz#255db92b23197108757a888b01e5b729919abde0"
   integrity sha512-uM9uPzZJTF6wRQORmSrvOIgt4lJ9MC1sNgEOj2XGsDTRE4kmpWxg7ENK9EWNKJRMAOY9z0MuF4yIfl6gp4sotA==