emit resize event when banners are shown/hidden to restore scroll pos

src/Notifier.js

@@ -220,7 +220,17 @@ const Notifier = {
         }
     },
 
-    isToolbarHidden: function() {
+    shouldShowToolbar: function() {
+        const client = MatrixClientPeg.get();
+        if (!client) {
+            return false;
+        }
+        const isGuest = client.isGuest();
+        return !isGuest && Notifier.supportsDesktopNotifications() &&
+            !Notifier.isEnabled() && !Notifier._isToolbarHidden();
+    },
+
+    _isToolbarHidden: function() {
         // Check localStorage for any such meta data
         if (global.localStorage) {
             return global.localStorage.getItem("notifications_hidden") === "true";

src/components/structures/LoggedInView.js

@@ -22,7 +22,6 @@ import PropTypes from 'prop-types';
 import { DragDropContext } from 'react-beautiful-dnd';
 
 import { KeyCode, isOnlyCtrlOrCmdKeyEvent } from '../../Keyboard';
-import Notifier from '../../Notifier';
 import PageTypes from '../../PageTypes';
 import CallMediaHandler from '../../CallMediaHandler';
 import sdk from '../../index';
@@ -121,6 +120,18 @@ const LoggedInView = React.createClass({
         this._matrixClient.on("RoomState.events", this.onRoomStateEvents);
     },
 
+    componentDidUpdate(prevProps) {
+        // attempt to guess when a banner was opened or closed
+        if (
+            (prevProps.showCookieBar !== this.props.showCookieBar) ||
+            (prevProps.hasNewVersion !== this.props.hasNewVersion) ||
+            (prevProps.userHasGeneratedPassword !== this.props.userHasGeneratedPassword) ||
+            (prevProps.showNotifierToolbar !== this.props.showNotifierToolbar)
+        ) {
+            this.props.resizeNotifier.notifyBannersChanged();
+        }
+    },
+
     componentWillUnmount: function() {
         document.removeEventListener('keydown', this._onKeyDown);
         this._matrixClient.removeListener("accountData", this.onAccountData);
@@ -491,7 +502,6 @@ const LoggedInView = React.createClass({
         });
 
         let topBar;
-        const isGuest = this.props.matrixClient.isGuest();
         if (this.state.syncErrorData && this.state.syncErrorData.error.errcode === 'M_RESOURCE_LIMIT_EXCEEDED') {
             topBar = <ServerLimitBar kind='hard'
                 adminContact={this.state.syncErrorData.error.data.admin_contact}
@@ -515,10 +525,7 @@ const LoggedInView = React.createClass({
             topBar = <UpdateCheckBar {...this.props.checkingForUpdate} />;
         } else if (this.state.userHasGeneratedPassword) {
             topBar = <PasswordNagBar />;
-        } else if (
-            !isGuest && Notifier.supportsDesktopNotifications() &&
-            !Notifier.isEnabled() && !Notifier.isToolbarHidden()
-        ) {
+        } else if (this.props.showNotifierToolbar) {
             topBar = <MatrixToolbar />;
         }
 

src/components/structures/MatrixChat.js

@@ -29,6 +29,7 @@ import PlatformPeg from "../../PlatformPeg";
 import SdkConfig from "../../SdkConfig";
 import * as RoomListSorter from "../../RoomListSorter";
 import dis from "../../dispatcher";
+import Notifier from '../../Notifier';
 
 import Modal from "../../Modal";
 import Tinter from "../../Tinter";
@@ -196,6 +197,7 @@ export default React.createClass({
 
             syncError: null, // If the current syncing status is ERROR, the error object, otherwise null.
             resizeNotifier: new ResizeNotifier(),
+            showNotifierToolbar: Notifier.shouldShowToolbar(),
         };
         return s;
     },
@@ -644,8 +646,9 @@ export default React.createClass({
             case 'view_invite':
                 showRoomInviteDialog(payload.roomId);
                 break;
-            case 'notifier_enabled':
-                this.forceUpdate();
+            case 'notifier_enabled': {
+                    this.setState({showNotifierToolbar: Notifier.shouldShowToolbar()});
+                }
                 break;
             case 'hide_left_panel':
                 this.setState({
@@ -1180,6 +1183,7 @@ export default React.createClass({
      */
     _onLoggedIn: async function() {
         this.setStateForNewView({view: VIEWS.LOGGED_IN});
+        this.setState({showNotifierToolbar: Notifier.shouldShowToolbar()});
         if (this._is_registered) {
             this._is_registered = false;
 
@@ -1672,7 +1676,10 @@ export default React.createClass({
     },
 
     _dispatchTimelineResize() {
+        // prevent dispatch from within dispatch error
+        setTimeout(() => {
             dis.dispatch({ action: 'timeline_resize' }, true);
+        }, 0);
     },
 
     onRoomCreated: function(roomId) {