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Step 8.4.2: Refactor `ActiveRoomObserver` out of existence 

The `RoomTile` was the last class to use it. Note that we also update the RVS to change its `instance` declaration type to fix a few tests.
pull/21833/head
Travis Ralston 2022-03-22 23:29:02 -06:00
parent 109ecbf070
commit d89fcf17fb
4 changed files with 50 additions and 102 deletions
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2
src/@types/global.d.ts vendored
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@ -29,7 +29,6 @@ import RoomListLayoutStore from "../stores/room-list/RoomListLayoutStore";
import { IntegrationManagers } from "../integrations/IntegrationManagers";
import { ModalManager } from "../Modal";
import SettingsStore from "../settings/SettingsStore";
import { ActiveRoomObserver } from "../ActiveRoomObserver";
import { Notifier } from "../Notifier";
import type { Renderer } from "react-dom";
import RightPanelStore from "../stores/right-panel/RightPanelStore";
@ -82,7 +81,6 @@ declare global {
mxDeviceListener: DeviceListener;
mxRoomListStore: RoomListStoreClass;
mxRoomListLayoutStore: RoomListLayoutStore;
mxActiveRoomObserver: ActiveRoomObserver;
mxPlatformPeg: PlatformPeg;
mxIntegrationManagers: typeof IntegrationManagers;
singletonModalManager: ModalManager;

85
src/ActiveRoomObserver.ts
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@ -1,85 +0,0 @@
/*
Copyright 2017 - 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.
*/
import { logger } from "matrix-js-sdk/src/logger";
import { RoomViewStore } from './stores/RoomViewStore';
type Listener = (isActive: boolean) => void;
/**
* Consumes changes from the RoomViewStore and notifies specific things
* about when the active room changes. Unlike listening for RoomViewStore
* changes, you can subscribe to only changes relevant to a particular
* room.
*
* TODO: If we introduce an observer for something else, factor out
* the adding / removing of listeners & emitting into a common class.
*/
export class ActiveRoomObserver {
private listeners: {[key: string]: Listener[]} = {};
private _activeRoomId = RoomViewStore.instance.getRoomId();
private readonly roomStoreToken: EventSubscription;
constructor() {
// TODO: We could self-destruct when the last listener goes away, or at least stop listening.
this.roomStoreToken = RoomViewStore.instance.addListener(this.onRoomViewStoreUpdate);
}
public get activeRoomId(): string {
return this._activeRoomId;
}
public addListener(roomId, listener) {
if (!this.listeners[roomId]) this.listeners[roomId] = [];
this.listeners[roomId].push(listener);
}
public removeListener(roomId, listener) {
if (this.listeners[roomId]) {
const i = this.listeners[roomId].indexOf(listener);
if (i > -1) {
this.listeners[roomId].splice(i, 1);
}
} else {
logger.warn("Unregistering unrecognised listener (roomId=" + roomId + ")");
}
}
private emit(roomId, isActive: boolean) {
if (!this.listeners[roomId]) return;
for (const l of this.listeners[roomId]) {
l.call(null, isActive);
}
}
private onRoomViewStoreUpdate = () => {
// emit for the old room ID
if (this._activeRoomId) this.emit(this._activeRoomId, false);
// update our cache
this._activeRoomId = RoomViewStore.instance.getRoomId();
// and emit for the new one
if (this._activeRoomId) this.emit(this._activeRoomId, true);
};
}
if (window.mxActiveRoomObserver === undefined) {
window.mxActiveRoomObserver = new ActiveRoomObserver();
}
export default window.mxActiveRoomObserver;

17
src/components/views/rooms/RoomTile.tsx
View File

@ -28,7 +28,6 @@ import dis from '../../../dispatcher/dispatcher';
import defaultDispatcher from '../../../dispatcher/dispatcher';
import { Action } from "../../../dispatcher/actions";
import SettingsStore from "../../../settings/SettingsStore";
import ActiveRoomObserver from "../../../ActiveRoomObserver";
import { _t } from "../../../languageHandler";
import { ChevronFace, ContextMenuTooltipButton } from "../../structures/ContextMenu";
import { DefaultTagID, TagID } from "../../../stores/room-list/models";
@ -61,6 +60,7 @@ import PosthogTrackers from "../../../PosthogTrackers";
import { ViewRoomPayload } from "../../../dispatcher/payloads/ViewRoomPayload";
import { KeyBindingAction } from "../../../accessibility/KeyboardShortcuts";
import { getKeyBindingsManager } from "../../../KeyBindingsManager";
import { RoomViewStore } from "../../../stores/RoomViewStore";
enum VoiceConnectionState {
Disconnected,
@ -110,7 +110,7 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
super(props);
this.state = {
selected: ActiveRoomObserver.activeRoomId === this.props.room.roomId,
selected: RoomViewStore.instance.getRoomId() === this.props.room.roomId,
notificationsMenuPosition: null,
generalMenuPosition: null,
// generatePreview() will return nothing if the user has previews disabled
@ -177,7 +177,7 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
}
this.updateVoiceMembers();
ActiveRoomObserver.addListener(this.props.room.roomId, this.onActiveRoomUpdate);
RoomViewStore.instance.addRoomListener(this.props.room.roomId, this.onActiveRoomUpdate);
this.dispatcherRef = defaultDispatcher.register(this.onAction);
MessagePreviewStore.instance.on(
MessagePreviewStore.getPreviewChangedEventName(this.props.room),
@ -185,21 +185,18 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
);
this.notificationState.on(NotificationStateEvents.Update, this.onNotificationUpdate);
this.roomProps.on(PROPERTY_UPDATED, this.onRoomPropertyUpdate);
this.props.room?.on(RoomEvent.Name, this.onRoomNameUpdate);
this.props.room?.currentState?.on(RoomStateEvent.Events, this.updateVoiceMembers);
this.props.room.on(RoomEvent.Name, this.onRoomNameUpdate);
this.props.room.currentState.on(RoomStateEvent.Events, this.updateVoiceMembers);
}
public componentWillUnmount() {
if (this.props.room) {
ActiveRoomObserver.removeListener(this.props.room.roomId, this.onActiveRoomUpdate);
RoomViewStore.instance.removeRoomListener(this.props.room.roomId, this.onActiveRoomUpdate);
MessagePreviewStore.instance.off(
MessagePreviewStore.getPreviewChangedEventName(this.props.room),
this.onRoomPreviewChanged,
);
this.props.room.currentState.off(RoomStateEvent.Events, this.updateVoiceMembers);
this.props.room.off(RoomEvent.Name, this.onRoomNameUpdate);
}
ActiveRoomObserver.removeListener(this.props.room.roomId, this.onActiveRoomUpdate);
this.props.room.currentState.off(RoomStateEvent.Events, this.updateVoiceMembers);
defaultDispatcher.unregister(this.dispatcherRef);
this.notificationState.off(NotificationStateEvents.Update, this.onNotificationUpdate);
this.roomProps.off(PROPERTY_UPDATED, this.onRoomPropertyUpdate);

38
src/stores/RoomViewStore.tsx
View File

@ -79,20 +79,52 @@ const INITIAL_STATE = {
wasContextSwitch: false,
};
type Listener = (isActive: boolean) => void;
/**
* A class for storing application state for RoomView. This is the RoomView's interface
* with a subset of the js-sdk.
* ```
*/
export class RoomViewStore extends Store<ActionPayload> {
// Important: This cannot be a dynamic getter (lazily-constructed instance) because
// otherwise we'll miss view_room dispatches during startup, breaking relaunches of
// the app. We need to eagerly create the instance.
public static readonly instance = new RoomViewStore();
private state = INITIAL_STATE; // initialize state
// Keep these out of state to avoid causing excessive/recursive updates
private roomIdActivityListeners: Record<string, Listener[]> = {};
public constructor() {
super(dis);
}
public addRoomListener(roomId: string, fn: Listener) {
if (!this.roomIdActivityListeners[roomId]) this.roomIdActivityListeners[roomId] = [];
this.roomIdActivityListeners[roomId].push(fn);
}
public removeRoomListener(roomId: string, fn: Listener) {
if (this.roomIdActivityListeners[roomId]) {
const i = this.roomIdActivityListeners[roomId].indexOf(fn);
if (i > -1) {
this.roomIdActivityListeners[roomId].splice(i, 1);
}
} else {
logger.warn("Unregistering unrecognised listener (roomId=" + roomId + ")");
}
}
private emitForRoom(roomId: string, isActive: boolean) {
if (!this.roomIdActivityListeners[roomId]) return;
for (const fn of this.roomIdActivityListeners[roomId]) {
fn.call(null, isActive);
}
}
private setState(newState: Partial<typeof INITIAL_STATE>) {
// If values haven't changed, there's nothing to do.
// This only tries a shallow comparison, so unchanged objects will slip
@ -108,7 +140,13 @@ export class RoomViewStore extends Store<ActionPayload> {
return;
}
const lastRoomId = this.state.roomId;
this.state = Object.assign(this.state, newState);
if (lastRoomId !== this.state.roomId) {
if (lastRoomId) this.emitForRoom(lastRoomId, false);
if (this.state.roomId) this.emitForRoom(this.state.roomId, true);
}
this.__emitChange();
}