Catch errors sooner so users can recover more easily

res/css/views/rooms/_EventTile.scss

@@ -653,3 +653,17 @@ div.mx_EventTile_notSent.mx_EventTile_redacted .mx_UnknownBody {
         }
     }
 }
+
+.mx_EventTile_tileError {
+    color: red;
+
+    .mx_EventTile_line span {
+        padding: 4px 8px;
+        border-radius: 11px;
+        box-shadow: 0px 0px 3px red inset;
+    }
+
+    a {
+        margin-left: 1em;
+    }
+}

src/components/structures/MessagePanel.js

@@ -502,6 +502,7 @@ export default class MessagePanel extends React.Component {
     }
 
     _getTilesForEvent(prevEvent, mxEv, last) {
+        const TileErrorBoundary = sdk.getComponent('messages.TileErrorBoundary');
         const EventTile = sdk.getComponent('rooms.EventTile');
         const DateSeparator = sdk.getComponent('messages.DateSeparator');
         const ret = [];
@@ -575,25 +576,27 @@ export default class MessagePanel extends React.Component {
                 ref={this._collectEventNode.bind(this, eventId)}
                 data-scroll-tokens={scrollToken}
             >
-                <EventTile mxEvent={mxEv}
-                    continuation={continuation}
-                    isRedacted={mxEv.isRedacted()}
-                    replacingEventId={mxEv.replacingEventId()}
-                    editState={isEditing && this.props.editState}
-                    onHeightChanged={this._onHeightChanged}
-                    readReceipts={readReceipts}
-                    readReceiptMap={this._readReceiptMap}
-                    showUrlPreview={this.props.showUrlPreview}
-                    checkUnmounting={this._isUnmounting.bind(this)}
-                    eventSendStatus={mxEv.getAssociatedStatus()}
-                    tileShape={this.props.tileShape}
-                    isTwelveHour={this.props.isTwelveHour}
-                    permalinkCreator={this.props.permalinkCreator}
-                    last={last}
-                    isSelectedEvent={highlight}
-                    getRelationsForEvent={this.props.getRelationsForEvent}
-                    showReactions={this.props.showReactions}
-                />
+                <TileErrorBoundary>
+                    <EventTile mxEvent={mxEv}
+                        continuation={continuation}
+                        isRedacted={mxEv.isRedacted()}
+                        replacingEventId={mxEv.replacingEventId()}
+                        editState={isEditing && this.props.editState}
+                        onHeightChanged={this._onHeightChanged}
+                        readReceipts={readReceipts}
+                        readReceiptMap={this._readReceiptMap}
+                        showUrlPreview={this.props.showUrlPreview}
+                        checkUnmounting={this._isUnmounting.bind(this)}
+                        eventSendStatus={mxEv.getAssociatedStatus()}
+                        tileShape={this.props.tileShape}
+                        isTwelveHour={this.props.isTwelveHour}
+                        permalinkCreator={this.props.permalinkCreator}
+                        last={last}
+                        isSelectedEvent={highlight}
+                        getRelationsForEvent={this.props.getRelationsForEvent}
+                        showReactions={this.props.showReactions}
+                    />
+                </TileErrorBoundary>
             </li>,
         );
 
@@ -755,6 +758,7 @@ export default class MessagePanel extends React.Component {
     }
 
     render() {
+        const ErrorBoundary = sdk.getComponent('elements.ErrorBoundary');
         const ScrollPanel = sdk.getComponent("structures.ScrollPanel");
         const WhoIsTypingTile = sdk.getComponent("rooms.WhoIsTypingTile");
         const Spinner = sdk.getComponent("elements.Spinner");
@@ -787,22 +791,24 @@ export default class MessagePanel extends React.Component {
         }
 
         return (
-            <ScrollPanel
-                ref={this._scrollPanel}
-                className={className}
-                onScroll={this.props.onScroll}
-                onResize={this.onResize}
-                onFillRequest={this.props.onFillRequest}
-                onUnfillRequest={this.props.onUnfillRequest}
-                style={style}
-                stickyBottom={this.props.stickyBottom}
-                resizeNotifier={this.props.resizeNotifier}
-            >
-                { topSpinner }
-                { this._getEventTiles() }
-                { whoIsTyping }
-                { bottomSpinner }
-            </ScrollPanel>
+            <ErrorBoundary>
+                <ScrollPanel
+                    ref={this._scrollPanel}
+                    className={className}
+                    onScroll={this.props.onScroll}
+                    onResize={this.onResize}
+                    onFillRequest={this.props.onFillRequest}
+                    onUnfillRequest={this.props.onUnfillRequest}
+                    style={style}
+                    stickyBottom={this.props.stickyBottom}
+                    resizeNotifier={this.props.resizeNotifier}
+                >
+                    { topSpinner }
+                    { this._getEventTiles() }
+                    { whoIsTyping }
+                    { bottomSpinner }
+                </ScrollPanel>
+            </ErrorBoundary>
         );
     }
 }

src/components/views/messages/TileErrorBoundary.js

@@ -0,0 +1,70 @@
+/*
+Copyright 2020 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 React from 'react';
+import classNames from 'classnames';
+import { _t } from '../../../languageHandler';
+import * as sdk from '../../../index';
+import Modal from '../../../Modal';
+
+export default class TileErrorBoundary extends React.Component {
+    constructor(props) {
+        super(props);
+
+        this.state = {
+            error: null,
+        };
+    }
+
+    static getDerivedStateFromError(error) {
+        // Side effects are not permitted here, so we only update the state so
+        // that the next render shows an error message.
+        return { error };
+    }
+
+    _onBugReport = () => {
+        const BugReportDialog = sdk.getComponent("dialogs.BugReportDialog");
+        if (!BugReportDialog) {
+            return;
+        }
+        Modal.createTrackedDialog('Bug Report Dialog', '', BugReportDialog, {
+            label: 'react-soft-crash-tile',
+        });
+    };
+
+    render() {
+        if (this.state.error) {
+            const classes = {
+                mx_EventTile: true,
+                mx_EventTile_info: true,
+                mx_EventTile_content: true,
+                mx_EventTile_tileError: true,
+            };
+            return (<div className={classNames(classes)}>
+                <div className="mx_EventTile_line">
+                    <span>
+                        {_t("An error occurred while rendering this event.")}
+                        <a onClick={this._onBugReport} href="#">
+                            {_t("Submit debug logs")}
+                        </a>
+                    </span>
+                </div>
+            </div>);
+        }
+
+        return this.props.children;
+    }
+}

src/i18n/strings/en_EN.json

@@ -1268,6 +1268,7 @@
     "You are about to be taken to a third-party site so you can authenticate your account for use with %(integrationsUrl)s. Do you wish to continue?": "You are about to be taken to a third-party site so you can authenticate your account for use with %(integrationsUrl)s. Do you wish to continue?",
     "Edited at %(date)s. Click to view edits.": "Edited at %(date)s. Click to view edits.",
     "edited": "edited",
+    "An error occurred while rendering this event.": "An error occurred while rendering this event.",
     "Removed or unknown message type": "Removed or unknown message type",
     "Message removed by %(userId)s": "Message removed by %(userId)s",
     "Message removed": "Message removed",