Improve switching between rich and plain editing modes (#9776)

* allows switching between modes that retains formatting
* updates rich text composer dependency to 0.13.0 (@matrix-org/matrix-wysiwyg)
* improves handling of enter keypresses when ctrlEnterTosend setting is true in plain text editor
* changes the message event content when using the new editor
* adds tests for the changes to the plain text editor

src/components/views/rooms/MessageComposer.tsx

@@ -54,9 +54,8 @@ import { ViewRoomPayload } from "../../../dispatcher/payloads/ViewRoomPayload";
 import { isLocalRoom } from "../../../utils/localRoom/isLocalRoom";
 import { Features } from "../../../settings/Settings";
 import { VoiceMessageRecording } from "../../../audio/VoiceMessageRecording";
-import { SendWysiwygComposer, sendMessage } from "./wysiwyg_composer/";
+import { SendWysiwygComposer, sendMessage, getConversionFunctions } from "./wysiwyg_composer/";
 import { MatrixClientProps, withMatrixClientHOC } from "../../../contexts/MatrixClientContext";
-import { htmlToPlainText } from "../../../utils/room/htmlToPlaintext";
 import { setUpVoiceBroadcastPreRecording } from "../../../voice-broadcast/utils/setUpVoiceBroadcastPreRecording";
 import { SdkContextClass } from "../../../contexts/SDKContext";
 
@@ -333,7 +332,7 @@ export class MessageComposer extends React.Component<IProps, IState> {
 
         if (this.state.isWysiwygLabEnabled) {
             const { permalinkCreator, relation, replyToEvent } = this.props;
-            sendMessage(this.state.composerContent, this.state.isRichTextEnabled, {
+            await sendMessage(this.state.composerContent, this.state.isRichTextEnabled, {
                 mxClient: this.props.mxClient,
                 roomContext: this.context,
                 permalinkCreator,
@@ -358,14 +357,19 @@ export class MessageComposer extends React.Component<IProps, IState> {
         });
     };
 
-    private onRichTextToggle = () => {
-        this.setState((state) => ({
-            isRichTextEnabled: !state.isRichTextEnabled,
-            initialComposerContent: !state.isRichTextEnabled
-                ? state.composerContent
-                : // TODO when available use rust model plain text
-                  htmlToPlainText(state.composerContent),
-        }));
+    private onRichTextToggle = async () => {
+        const { richToPlain, plainToRich } = await getConversionFunctions();
+
+        const { isRichTextEnabled, composerContent } = this.state;
+        const convertedContent = isRichTextEnabled
+            ? await richToPlain(composerContent)
+            : await plainToRich(composerContent);
+
+        this.setState({
+            isRichTextEnabled: !isRichTextEnabled,
+            composerContent: convertedContent,
+            initialComposerContent: convertedContent,
+        });
     };
 
     private onVoiceStoreUpdate = () => {

src/components/views/rooms/wysiwyg_composer/DynamicImportWysiwygComposer.tsx

@@ -16,9 +16,25 @@ limitations under the License.
 
 import React, { ComponentProps, lazy, Suspense } from "react";
 
+// we need to import the types for TS, but do not import the sendMessage
+// function to avoid importing from "@matrix-org/matrix-wysiwyg"
+import { SendMessageParams } from "./utils/message";
+
 const SendComposer = lazy(() => import("./SendWysiwygComposer"));
 const EditComposer = lazy(() => import("./EditWysiwygComposer"));
 
+export const dynamicImportSendMessage = async (message: string, isHTML: boolean, params: SendMessageParams) => {
+    const { sendMessage } = await import("./utils/message");
+
+    return sendMessage(message, isHTML, params);
+};
+
+export const dynamicImportConversionFunctions = async () => {
+    const { richToPlain, plainToRich } = await import("@matrix-org/matrix-wysiwyg");
+
+    return { richToPlain, plainToRich };
+};
+
 export function DynamicImportSendWysiwygComposer(props: ComponentProps<typeof SendComposer>) {
     return (
         <Suspense fallback={<div />}>

src/components/views/rooms/wysiwyg_composer/hooks/usePlainTextListeners.ts

@@ -17,11 +17,22 @@ limitations under the License.
 import { KeyboardEvent, SyntheticEvent, useCallback, useRef, useState } from "react";
 
 import { useSettingValue } from "../../../../../hooks/useSettings";
+import { IS_MAC, Key } from "../../../../../Keyboard";
 
 function isDivElement(target: EventTarget): target is HTMLDivElement {
     return target instanceof HTMLDivElement;
 }
 
+// Hitting enter inside the editor inserts an editable div, initially containing a <br />
+// For correct display, first replace this pattern with a newline character and then remove divs
+// noting that they are used to delimit paragraphs
+function amendInnerHtml(text: string) {
+    return text
+        .replace(/<div><br><\/div>/g, "\n") // this is pressing enter then not typing
+        .replace(/<div>/g, "\n") // this is from pressing enter, then typing inside the div
+        .replace(/<\/div>/g, "");
+}
+
 export function usePlainTextListeners(
     initialContent?: string,
     onChange?: (content: string) => void,
@@ -44,25 +55,39 @@ export function usePlainTextListeners(
         [onChange],
     );
 
+    const enterShouldSend = !useSettingValue<boolean>("MessageComposerInput.ctrlEnterToSend");
     const onInput = useCallback(
         (event: SyntheticEvent<HTMLDivElement, InputEvent | ClipboardEvent>) => {
             if (isDivElement(event.target)) {
-                setText(event.target.innerHTML);
+                // if enterShouldSend, we do not need to amend the html before setting text
+                const newInnerHTML = enterShouldSend ? event.target.innerHTML : amendInnerHtml(event.target.innerHTML);
+                setText(newInnerHTML);
             }
         },
-        [setText],
+        [setText, enterShouldSend],
     );
 
-    const isCtrlEnter = useSettingValue<boolean>("MessageComposerInput.ctrlEnterToSend");
     const onKeyDown = useCallback(
         (event: KeyboardEvent<HTMLDivElement>) => {
-            if (event.key === "Enter" && !event.shiftKey && (!isCtrlEnter || (isCtrlEnter && event.ctrlKey))) {
-                event.preventDefault();
-                event.stopPropagation();
-                send();
+            if (event.key === Key.ENTER) {
+                const sendModifierIsPressed = IS_MAC ? event.metaKey : event.ctrlKey;
+
+                // if enter should send, send if the user is not pushing shift
+                if (enterShouldSend && !event.shiftKey) {
+                    event.preventDefault();
+                    event.stopPropagation();
+                    send();
+                }
+
+                // if enter should not send, send only if the user is pushing ctrl/cmd
+                if (!enterShouldSend && sendModifierIsPressed) {
+                    event.preventDefault();
+                    event.stopPropagation();
+                    send();
+                }
             }
         },
-        [isCtrlEnter, send],
+        [enterShouldSend, send],
     );
 
     return { ref, onInput, onPaste: onInput, onKeyDown, content, setContent: setText };

src/components/views/rooms/wysiwyg_composer/index.ts

@@ -17,5 +17,6 @@ limitations under the License.
 export {
     DynamicImportSendWysiwygComposer as SendWysiwygComposer,
     DynamicImportEditWysiwygComposer as EditWysiwygComposer,
+    dynamicImportSendMessage as sendMessage,
+    dynamicImportConversionFunctions as getConversionFunctions,
 } from "./DynamicImportWysiwygComposer";
-export { sendMessage } from "./utils/message";

src/components/views/rooms/wysiwyg_composer/utils/createMessageContent.ts

@@ -14,13 +14,12 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+import { richToPlain, plainToRich } from "@matrix-org/matrix-wysiwyg";
 import { IContent, IEventRelation, MatrixEvent, MsgType } from "matrix-js-sdk/src/matrix";
 
-import { htmlSerializeFromMdIfNeeded } from "../../../../../editor/serialize";
 import SettingsStore from "../../../../../settings/SettingsStore";
 import { RoomPermalinkCreator } from "../../../../../utils/permalinks/Permalinks";
 import { addReplyToMessageContent } from "../../../../../utils/Reply";
-import { htmlToPlainText } from "../../../../../utils/room/htmlToPlaintext";
 
 // Merges favouring the given relation
 function attachRelation(content: IContent, relation?: IEventRelation): void {
@@ -62,7 +61,7 @@ interface CreateMessageContentParams {
     editedEvent?: MatrixEvent;
 }
 
-export function createMessageContent(
+export async function createMessageContent(
     message: string,
     isHTML: boolean,
     {
@@ -72,7 +71,7 @@ export function createMessageContent(
         includeReplyLegacyFallback = true,
         editedEvent,
     }: CreateMessageContentParams,
-): IContent {
+): Promise<IContent> {
     // TODO emote ?
 
     const isEditing = Boolean(editedEvent);
@@ -90,26 +89,22 @@ export function createMessageContent(
 
     // const body = textSerialize(model);
 
-    // TODO remove this ugly hack for replace br tag
-    const body = (isHTML && htmlToPlainText(message)) || message.replace(/<br>/g, "\n");
+    // if we're editing rich text, the message content is pure html
+    // BUT if we're not, the message content will be plain text
+    const body = isHTML ? await richToPlain(message) : message;
     const bodyPrefix = (isReplyAndEditing && getTextReplyFallback(editedEvent)) || "";
     const formattedBodyPrefix = (isReplyAndEditing && getHtmlReplyFallback(editedEvent)) || "";
 
     const content: IContent = {
         // TODO emote
         msgtype: MsgType.Text,
-        // TODO when available, use HTML --> Plain text conversion from wysiwyg rust model
         body: isEditing ? `${bodyPrefix} * ${body}` : body,
     };
 
     // TODO markdown support
 
     const isMarkdownEnabled = SettingsStore.getValue<boolean>("MessageComposerInput.useMarkdown");
-    const formattedBody = isHTML
-        ? message
-        : isMarkdownEnabled
-        ? htmlSerializeFromMdIfNeeded(message, { forceHTML: isReply })
-        : null;
+    const formattedBody = isHTML ? message : isMarkdownEnabled ? await plainToRich(message) : null;
 
     if (formattedBody) {
         content.format = "org.matrix.custom.html";

src/components/views/rooms/wysiwyg_composer/utils/message.ts

@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 import { Composer as ComposerEvent } from "@matrix-org/analytics-events/types/typescript/Composer";
-import { IContent, IEventRelation, MatrixEvent } from "matrix-js-sdk/src/models/event";
+import { IEventRelation, MatrixEvent } from "matrix-js-sdk/src/models/event";
 import { ISendEventResponse, MatrixClient } from "matrix-js-sdk/src/matrix";
 import { THREAD_RELATION_TYPE } from "matrix-js-sdk/src/models/thread";
 
@@ -34,7 +34,7 @@ import EditorStateTransfer from "../../../../../utils/EditorStateTransfer";
 import { createMessageContent } from "./createMessageContent";
 import { isContentModified } from "./isContentModified";
 
-interface SendMessageParams {
+export interface SendMessageParams {
     mxClient: MatrixClient;
     relation?: IEventRelation;
     replyToEvent?: MatrixEvent;
@@ -43,10 +43,18 @@ interface SendMessageParams {
     includeReplyLegacyFallback?: boolean;
 }
 
-export function sendMessage(message: string, isHTML: boolean, { roomContext, mxClient, ...params }: SendMessageParams) {
+export async function sendMessage(
+    message: string,
+    isHTML: boolean,
+    { roomContext, mxClient, ...params }: SendMessageParams,
+) {
     const { relation, replyToEvent } = params;
     const { room } = roomContext;
-    const { roomId } = room;
+    const roomId = room?.roomId;
+
+    if (!roomId) {
+        return;
+    }
 
     const posthogEvent: ComposerEvent = {
         eventName: "Composer",
@@ -63,7 +71,7 @@ export function sendMessage(message: string, isHTML: boolean, { roomContext, mxC
     }*/
     PosthogAnalytics.instance.trackEvent<ComposerEvent>(posthogEvent);
 
-    let content: IContent;
+    const content = await createMessageContent(message, isHTML, params);
 
     // TODO slash comment
 
@@ -71,10 +79,6 @@ export function sendMessage(message: string, isHTML: boolean, { roomContext, mxC
 
     // TODO quick reaction
 
-    if (!content) {
-        content = createMessageContent(message, isHTML, params);
-    }
-
     // don't bother sending an empty message
     if (!content.body.trim()) {
         return;
@@ -84,7 +88,7 @@ export function sendMessage(message: string, isHTML: boolean, { roomContext, mxC
         decorateStartSendingTime(content);
     }
 
-    const threadId = relation?.rel_type === THREAD_RELATION_TYPE.name ? relation.event_id : null;
+    const threadId = relation?.event_id && relation?.rel_type === THREAD_RELATION_TYPE.name ? relation.event_id : null;
 
     const prom = doMaybeLocalRoomAction(
         roomId,
@@ -139,7 +143,7 @@ interface EditMessageParams {
     editorStateTransfer: EditorStateTransfer;
 }
 
-export function editMessage(html: string, { roomContext, mxClient, editorStateTransfer }: EditMessageParams) {
+export async function editMessage(html: string, { roomContext, mxClient, editorStateTransfer }: EditMessageParams) {
     const editedEvent = editorStateTransfer.getEvent();
 
     PosthogAnalytics.instance.trackEvent<ComposerEvent>({
@@ -156,7 +160,7 @@ export function editMessage(html: string, { roomContext, mxClient, editorStateTr
         const position = this.model.positionForOffset(caret.offset, caret.atNodeEnd);
         this.editorRef.current?.replaceEmoticon(position, REGEX_EMOTICON);
     }*/
-    const editContent = createMessageContent(html, true, { editedEvent });
+    const editContent = await createMessageContent(html, true, { editedEvent });
     const newContent = editContent["m.new_content"];
 
     const shouldSend = true;
@@ -174,10 +178,10 @@ export function editMessage(html: string, { roomContext, mxClient, editorStateTr
 
     let response: Promise<ISendEventResponse> | undefined;
 
-    // If content is modified then send an updated event into the room
-    if (isContentModified(newContent, editorStateTransfer)) {
-        const roomId = editedEvent.getRoomId();
+    const roomId = editedEvent.getRoomId();
 
+    // If content is modified then send an updated event into the room
+    if (isContentModified(newContent, editorStateTransfer) && roomId) {
         // TODO Slash Commands
 
         if (shouldSend) {

src/utils/room/htmlToPlaintext.ts

@@ -1,19 +0,0 @@
-/*
-Copyright 2022 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-export function htmlToPlainText(html: string) {
-    return new DOMParser().parseFromString(html, "text/html").documentElement.textContent;
-}