Add Reply in thread button to the right-click message context-menu

res/css/views/context_menus/_MessageContextMenu.scss

@@ -107,6 +107,10 @@ limitations under the License.
         mask-image: url('$(res)/img/element-icons/room/message-bar/reply.svg');
     }
 
+    .mx_MessageContextMenu_iconReplyInThread::before {
+        mask-image: url('$(res)/img/element-icons/message/thread.svg');
+    }
+
     .mx_MessageContextMenu_iconReact::before {
         mask-image: url('$(res)/img/element-icons/room/message-bar/emoji.svg');
     }

src/components/structures/MatrixChat.tsx

@@ -129,6 +129,10 @@ import { SnakedObject } from "../../utils/SnakedObject";
 import { leaveRoomBehaviour } from "../../utils/leave-behaviour";
 import VideoChannelStore from "../../stores/VideoChannelStore";
 import { IRoomStateEventsActionPayload } from "../../actions/MatrixActionCreators";
+import { ShowThreadPayload } from "../../dispatcher/payloads/ShowThreadPayload";
+import { RightPanelPhases } from "../../stores/right-panel/RightPanelStorePhases";
+import RightPanelStore from "../../stores/right-panel/RightPanelStore";
+import { TimelineRenderingType } from "../../contexts/RoomContext";
 
 // legacy export
 export { default as Views } from "../../Views";
@@ -798,6 +802,41 @@ export default class MatrixChat extends React.PureComponent<IProps, IState> {
                 hideAnalyticsToast();
                 SettingsStore.setValue("pseudonymousAnalyticsOptIn", null, SettingLevel.ACCOUNT, false);
                 break;
+            case Action.ShowThread: {
+                const {
+                    rootEvent,
+                    initialEvent,
+                    highlighted,
+                    scrollIntoView,
+                    push,
+                } = payload as ShowThreadPayload;
+
+                const threadViewCard = {
+                    phase: RightPanelPhases.ThreadView,
+                    state: {
+                        threadHeadEvent: rootEvent,
+                        initialEvent: initialEvent,
+                        isInitialEventHighlighted: highlighted,
+                        initialEventScrollIntoView: scrollIntoView,
+                    },
+                };
+                if (push ?? false) {
+                    RightPanelStore.instance.pushCard(threadViewCard);
+                } else {
+                    RightPanelStore.instance.setCards([
+                        { phase: RightPanelPhases.ThreadPanel },
+                        threadViewCard,
+                    ]);
+                }
+
+                // Focus the composer
+                dis.dispatch({
+                    action: Action.FocusSendMessageComposer,
+                    context: TimelineRenderingType.Thread,
+                });
+
+                break;
+            }
         }
     };
 

src/components/structures/RoomView.tsx

@@ -97,7 +97,6 @@ import RoomStatusBar from "./RoomStatusBar";
 import MessageComposer from '../views/rooms/MessageComposer';
 import JumpToBottomButton from "../views/rooms/JumpToBottomButton";
 import TopUnreadMessagesBar from "../views/rooms/TopUnreadMessagesBar";
-import { showThread } from '../../dispatcher/dispatch-actions/threads';
 import { fetchInitialEvent } from "../../utils/EventUtils";
 import { ComposerInsertPayload, ComposerType } from "../../dispatcher/payloads/ComposerInsertPayload";
 import AppsDrawer from '../views/rooms/AppsDrawer';
@@ -111,6 +110,7 @@ import FileDropTarget from './FileDropTarget';
 import Measured from '../views/elements/Measured';
 import { FocusComposerPayload } from '../../dispatcher/payloads/FocusComposerPayload';
 import { haveRendererForEvent } from "../../events/EventTileFactory";
+import { ShowThreadPayload } from "../../dispatcher/payloads/ShowThreadPayload";
 
 const DEBUG = false;
 let debuglog = function(msg: string) {};
@@ -452,7 +452,8 @@ export class RoomView extends React.Component<IRoomProps, IRoomState> {
 
             const thread = initialEvent?.getThread();
             if (thread && !initialEvent?.isThreadRoot) {
-                showThread({
+                dis.dispatch<ShowThreadPayload>({
+                    action: Action.ShowThread,
                     rootEvent: thread.rootEvent,
                     initialEvent,
                     highlighted: RoomViewStore.instance.isInitialEventHighlighted(),
@@ -464,7 +465,8 @@ export class RoomView extends React.Component<IRoomProps, IRoomState> {
                 newState.initialEventScrollIntoView = RoomViewStore.instance.initialEventScrollIntoView();
 
                 if (thread && initialEvent?.isThreadRoot) {
-                    showThread({
+                    dis.dispatch<ShowThreadPayload>({
+                        action: Action.ShowThread,
                         rootEvent: thread.rootEvent,
                         initialEvent,
                         highlighted: RoomViewStore.instance.isInitialEventHighlighted(),

src/components/views/context_menus/MessageContextMenu.tsx

@@ -16,12 +16,13 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React, { createRef } from 'react';
+import React, { createRef, useContext } from 'react';
 import { EventStatus, MatrixEvent } from 'matrix-js-sdk/src/models/event';
 import { EventType, RelationType } from "matrix-js-sdk/src/@types/event";
 import { Relations } from 'matrix-js-sdk/src/models/relations';
 import { RoomMemberEvent } from "matrix-js-sdk/src/models/room-member";
 import { M_POLL_START } from "matrix-events-sdk";
+import { Thread } from "matrix-js-sdk/src/models/thread";
 
 import { MatrixClientPeg } from '../../../MatrixClientPeg';
 import dis from '../../../dispatcher/dispatcher';
@@ -58,6 +59,59 @@ import { OpenReportEventDialogPayload } from "../../../dispatcher/payloads/OpenR
 import { createMapSiteLinkFromEvent } from '../../../utils/location';
 import { getForwardableEvent } from '../../../events/forward/getForwardableEvent';
 import { getShareableLocationEvent } from '../../../events/location/getShareableLocationEvent';
+import { ShowThreadPayload } from "../../../dispatcher/payloads/ShowThreadPayload";
+import { CardContext } from "../right_panel/context";
+import { UserTab } from "../dialogs/UserTab";
+
+interface IReplyInThreadButton {
+    mxEvent: MatrixEvent;
+    closeMenu: () => void;
+}
+
+const ReplyInThreadButton = ({ mxEvent, closeMenu }: IReplyInThreadButton) => {
+    const context = useContext(CardContext);
+    const relationType = mxEvent?.getRelation()?.rel_type;
+
+    // Can't create a thread from an event with an existing relation
+    if (Boolean(relationType) && relationType !== RelationType.Thread) return;
+
+    const onClick = (): void => {
+        if (!localStorage.getItem("mx_seen_feature_thread")) {
+            localStorage.setItem("mx_seen_feature_thread", "true");
+        }
+
+        if (!SettingsStore.getValue("feature_thread")) {
+            dis.dispatch({
+                action: Action.ViewUserSettings,
+                initialTabId: UserTab.Labs,
+            });
+        } else if (mxEvent.getThread() && !mxEvent.isThreadRoot) {
+            dis.dispatch<ShowThreadPayload>({
+                action: Action.ShowThread,
+                rootEvent: mxEvent.getThread().rootEvent,
+                initialEvent: mxEvent,
+                scroll_into_view: true,
+                highlighted: true,
+                push: context.isCard,
+            });
+        } else {
+            dis.dispatch<ShowThreadPayload>({
+                action: Action.ShowThread,
+                rootEvent: mxEvent,
+                push: context.isCard,
+            });
+        }
+        closeMenu();
+    };
+
+    return (
+        <IconizedContextMenuOption
+            iconClassName="mx_MessageContextMenu_iconReplyInThread"
+            label={_t("Reply in thread")}
+            onClick={onClick}
+        />
+    );
+};
 
 interface IProps extends IPosition {
     chevronFace: ChevronFace;
@@ -582,6 +636,23 @@ export default class MessageContextMenu extends React.Component<IProps, IState>
             );
         }
 
+        let replyInThreadButton: JSX.Element;
+        if (
+            rightClick &&
+            contentActionable &&
+            canSendMessages &&
+            SettingsStore.getValue("feature_thread") &&
+            Thread.hasServerSideSupport &&
+            timelineRenderingType !== TimelineRenderingType.Thread
+        ) {
+            replyInThreadButton = (
+                <ReplyInThreadButton
+                    mxEvent={mxEvent}
+                    closeMenu={this.closeMenu}
+                />
+            );
+        }
+
         let reactButton;
         if (rightClick && contentActionable && canReact) {
             reactButton = (
@@ -621,6 +692,7 @@ export default class MessageContextMenu extends React.Component<IProps, IState>
                 <IconizedContextMenuOptionList>
                     { reactButton }
                     { replyButton }
+                    { replyInThreadButton }
                     { editButton }
                 </IconizedContextMenuOptionList>
             );

src/components/views/messages/MessageActionBar.tsx

@@ -25,7 +25,7 @@ import { M_BEACON_INFO } from 'matrix-js-sdk/src/@types/beacon';
 
 import type { Relations } from 'matrix-js-sdk/src/models/relations';
 import { _t } from '../../../languageHandler';
-import dis from '../../../dispatcher/dispatcher';
+import dis, { defaultDispatcher } from '../../../dispatcher/dispatcher';
 import ContextMenu, { aboveLeftOf, ContextMenuTooltipButton, useContextMenu } from '../../structures/ContextMenu';
 import { isContentActionable, canEditContent, editEvent, canCancel } from '../../../utils/EventUtils';
 import RoomContext, { TimelineRenderingType } from "../../../contexts/RoomContext";
@@ -41,13 +41,13 @@ import { RoomPermalinkCreator } from '../../../utils/permalinks/Permalinks';
 import ReplyChain from '../elements/ReplyChain';
 import ReactionPicker from "../emojipicker/ReactionPicker";
 import { CardContext } from '../right_panel/context';
-import { showThread } from "../../../dispatcher/dispatch-actions/threads";
 import { shouldDisplayReply } from '../../../utils/Reply';
 import { Key } from "../../../Keyboard";
 import { ALTERNATE_KEY_NAME } from "../../../accessibility/KeyboardShortcuts";
 import { UserTab } from '../dialogs/UserTab';
 import { Action } from '../../../dispatcher/actions';
 import SdkConfig from "../../../SdkConfig";
+import { ShowThreadPayload } from "../../../dispatcher/payloads/ShowThreadPayload";
 
 interface IOptionsButtonProps {
     mxEvent: MatrixEvent;
@@ -190,15 +190,17 @@ const ReplyInThreadButton = ({ mxEvent }: IReplyInThreadButton) => {
                 initialTabId: UserTab.Labs,
             });
         } else if (mxEvent.getThread() && !mxEvent.isThreadRoot) {
-            showThread({
+            defaultDispatcher.dispatch<ShowThreadPayload>({
+                action: Action.ShowThread,
                 rootEvent: mxEvent.getThread().rootEvent,
                 initialEvent: mxEvent,
                 scroll_into_view: true,
                 highlighted: true,
                 push: context.isCard,
             });
         } else {
-            showThread({
+            defaultDispatcher.dispatch<ShowThreadPayload>({
+                action: Action.ShowThread,
                 rootEvent: mxEvent,
                 push: context.isCard,
             });

src/components/views/rooms/EventTile.tsx

@@ -58,7 +58,6 @@ import MessageActionBar from "../messages/MessageActionBar";
 import ReactionsRow from '../messages/ReactionsRow';
 import { getEventDisplayInfo } from '../../../utils/EventRenderingUtils';
 import SettingsStore from "../../../settings/SettingsStore";
-import { showThread } from '../../../dispatcher/dispatch-actions/threads';
 import { MessagePreviewStore } from '../../../stores/room-list/MessagePreviewStore';
 import RoomContext, { TimelineRenderingType } from "../../../contexts/RoomContext";
 import { MediaEventHelper } from "../../../utils/MediaEventHelper";
@@ -80,6 +79,7 @@ import { haveRendererForEvent, isMessageEvent, renderTile } from "../../../event
 import ThreadSummary, { ThreadMessagePreview } from "./ThreadSummary";
 import { ReadReceiptGroup } from './ReadReceiptGroup';
 import { useTooltip } from "../../../utils/useTooltip";
+import { ShowThreadPayload } from "../../../dispatcher/payloads/ShowThreadPayload";
 
 export type GetRelationsForEvent = (eventId: string, relationType: string, eventType: string) => Relations;
 
@@ -1353,7 +1353,11 @@ export class UnwrappedEventTile extends React.Component<IProps, IState> {
                         "onMouseEnter": () => this.setState({ hover: true }),
                         "onMouseLeave": () => this.setState({ hover: false }),
                         "onClick": (ev: MouseEvent) => {
-                            showThread({ rootEvent: this.props.mxEvent, push: true });
+                            dis.dispatch<ShowThreadPayload>({
+                                action: Action.ShowThread,
+                                rootEvent: this.props.mxEvent,
+                                push: true,
+                            });
                             const target = ev.currentTarget as HTMLElement;
                             const index = Array.from(target.parentElement.children).indexOf(target);
                             PosthogTrackers.trackInteraction("WebThreadsPanelThreadItem", ev, index);

src/components/views/rooms/ThreadSummary.tsx

@@ -21,14 +21,16 @@ import { IContent, MatrixEvent, MatrixEventEvent } from "matrix-js-sdk/src/model
 import { _t } from "../../../languageHandler";
 import { CardContext } from "../right_panel/context";
 import AccessibleButton, { ButtonEvent } from "../elements/AccessibleButton";
-import { showThread } from "../../../dispatcher/dispatch-actions/threads";
 import PosthogTrackers from "../../../PosthogTrackers";
 import { useTypedEventEmitter, useTypedEventEmitterState } from "../../../hooks/useEventEmitter";
 import RoomContext from "../../../contexts/RoomContext";
 import { MessagePreviewStore } from "../../../stores/room-list/MessagePreviewStore";
 import MemberAvatar from "../avatars/MemberAvatar";
 import { useAsyncMemo } from "../../../hooks/useAsyncMemo";
 import MatrixClientContext from "../../../contexts/MatrixClientContext";
+import { Action } from "../../../dispatcher/actions";
+import { ShowThreadPayload } from "../../../dispatcher/payloads/ShowThreadPayload";
+import defaultDispatcher from "../../../dispatcher/dispatcher";
 
 interface IProps {
     mxEvent: MatrixEvent;
@@ -50,7 +52,8 @@ const ThreadSummary = ({ mxEvent, thread }: IProps) => {
         <AccessibleButton
             className="mx_ThreadSummary"
             onClick={(ev: ButtonEvent) => {
-                showThread({
+                defaultDispatcher.dispatch<ShowThreadPayload>({
+                    action: Action.ShowThread,
                     rootEvent: mxEvent,
                     push: cardContext.isCard,
                 });

src/dispatcher/actions.ts

@@ -326,4 +326,9 @@ export enum Action {
      * Fires with the PlatformSetPayload.
      */
     PlatformSet = "platform_set",
+
+    /**
+     * Fired when we want to view a thread, either a new one or an existing one
+     */
+    ShowThread = "show_thread",
 }

src/dispatcher/dispatch-actions/threads.ts

@@ -14,46 +14,8 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import { MatrixEvent } from "matrix-js-sdk/src/models/event";
-
 import RightPanelStore from "../../stores/right-panel/RightPanelStore";
 import { RightPanelPhases } from "../../stores/right-panel/RightPanelStorePhases";
-import dis from "../dispatcher";
-import { Action } from "../actions";
-import { TimelineRenderingType } from "../../contexts/RoomContext";
-
-export const showThread = (props: {
-    rootEvent: MatrixEvent;
-    initialEvent?: MatrixEvent;
-    highlighted?: boolean;
-    scroll_into_view?: boolean;
-    push?: boolean;
-}) => {
-    const push = props.push ?? false;
-    const threadViewCard = {
-        phase: RightPanelPhases.ThreadView,
-        state: {
-            threadHeadEvent: props.rootEvent,
-            initialEvent: props.initialEvent,
-            isInitialEventHighlighted: props.highlighted,
-            initialEventScrollIntoView: props.scroll_into_view,
-        },
-    };
-    if (push) {
-        RightPanelStore.instance.pushCard(threadViewCard);
-    } else {
-        RightPanelStore.instance.setCards([
-            { phase: RightPanelPhases.ThreadPanel },
-            threadViewCard,
-        ]);
-    }
-
-    // Focus the composer
-    dis.dispatch({
-        action: Action.FocusSendMessageComposer,
-        context: TimelineRenderingType.Thread,
-    });
-};
 
 export const showThreadPanel = () => {
     RightPanelStore.instance.setCard({ phase: RightPanelPhases.ThreadPanel });

src/dispatcher/payloads/ShowThreadPayload.ts

@@ -0,0 +1,30 @@
+/*
+Copyright 2021 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.
+*/
+
+import { MatrixEvent } from "matrix-js-sdk/src/models/event";
+
+import { ActionPayload } from "../payloads";
+import { Action } from "../actions";
+
+export interface ShowThreadPayload extends ActionPayload {
+    action: Action.ShowThread;
+
+    rootEvent: MatrixEvent;
+    initialEvent?: MatrixEvent;
+    highlighted?: boolean;
+    scrollIntoView?: boolean;
+    push?: boolean;
+}