Strict mode updates for <RoomView />

This gets RoomView.ts to pass `tsc --strict`. Should be functionally unchanged.

A number of other files were touched to correct signatures.

See:
* element-hq/element-web#23542
* element-hq/element-web#23692

Signed-off-by: Clark Fischer <clark.fischer@gmail.com>

Author: clarkf

src/components/structures/MessagePanel.tsx

@@ -375,7 +375,7 @@ export default class MessagePanel extends React.Component<IProps, IState> {
      *
      * returns null if we are not mounted.
      */
-    public getScrollState(): IScrollState {
+    public getScrollState(): IScrollState | null {
         return this.scrollPanel.current?.getScrollState() ?? null;
     }
 

src/components/structures/RoomView.tsx

@@ -698,7 +698,7 @@ class TimelinePanel extends React.Component<IProps, IState> {
 
         if (!this.messagePanel.current?.getScrollState()) return;
 
-        if (!this.messagePanel.current.getScrollState().stuckAtBottom) {
+        if (!this.messagePanel.current.getScrollState()?.stuckAtBottom) {
             // we won't load this event now, because we don't want to push any
             // events off the other end of the timeline. But we need to note
             // that we can now paginate.
@@ -1264,7 +1264,7 @@ class TimelinePanel extends React.Component<IProps, IState> {
      *
      * returns null if we are not mounted.
      */
-    public getScrollState = (): IScrollState => {
+    public getScrollState = (): IScrollState | null => {
         if (!this.messagePanel.current) {
             return null;
         }

src/components/structures/TimelinePanel.tsx

@@ -466,7 +466,7 @@ export interface IProps {
     onInviteClick: (() => void) | null;
     onForgetClick: (() => void) | null;
     onAppsClick: (() => void) | null;
-    e2eStatus: E2EStatus;
+    e2eStatus?: E2EStatus;
     appsShown: boolean;
     searchInfo?: ISearchInfo;
     excludedRightPanelPhaseButtons?: Array<RightPanelPhases>;

src/components/views/rooms/RoomHeader.tsx

@@ -27,7 +27,7 @@ import SearchWarning, { WarningKind } from "../elements/SearchWarning";
 
 interface IProps {
     onCancelClick: () => void;
-    onSearch: (query: string, scope: string) => void;
+    onSearch: (query: string, scope: SearchScope) => void;
     searchInProgress?: boolean;
     isRoomEncrypted?: boolean;
 }

src/components/views/rooms/SearchBar.tsx

@@ -22,7 +22,7 @@ import { Action } from "../actions";
 export interface ShowThreadPayload extends ActionPayload {
     action: Action.ShowThread;
 
-    rootEvent: MatrixEvent;
+    rootEvent?: MatrixEvent;
     initialEvent?: MatrixEvent;
     highlighted?: boolean;
     scrollIntoView?: boolean;

src/dispatcher/payloads/ShowThreadPayload.ts

@@ -38,7 +38,7 @@ export class RoomScrollStateStore {
     //        from the focussedEvent.
     private scrollStateMap = new Map<string, ScrollState>();
 
-    public getScrollState(roomId: string): ScrollState {
+    public getScrollState(roomId: string): ScrollState | undefined {
         return this.scrollStateMap.get(roomId);
     }
 

src/stores/RoomScrollStateStore.ts

@@ -1,5 +1,5 @@
 /*
-Copyright 2022 The Matrix.org Foundation C.I.C.
+Copyright 2022 - 2023 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.
@@ -106,13 +106,7 @@ describe("RoomView", () => {
 
         const roomView = mount(
             <SDKContext.Provider value={stores}>
-                <RoomView
-                    // threepidInvite should be optional on RoomView props
-                    // it is treated as optional in RoomView
-                    threepidInvite={undefined as any}
-                    resizeNotifier={new ResizeNotifier()}
-                    forceTimeline={false}
-                />
+                <RoomView resizeNotifier={new ResizeNotifier()} forceTimeline={false} />
             </SDKContext.Provider>,
         );
         await flushPromises();
@@ -142,14 +136,7 @@ describe("RoomView", () => {
 
         const roomView = render(
             <SDKContext.Provider value={stores}>
-                <RoomView
-                    // threepidInvite should be optional on RoomView props
-                    // it is treated as optional in RoomView
-                    threepidInvite={undefined as any}
-                    resizeNotifier={new ResizeNotifier()}
-                    forceTimeline={false}
-                    onRegistered={jest.fn()}
-                />
+                <RoomView resizeNotifier={new ResizeNotifier()} forceTimeline={false} onRegistered={jest.fn()} />
             </SDKContext.Provider>,
         );
         await flushPromises();