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Restrict reactions to a single emoji

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While the protocol supports more complex strings, in Riot we only want to
display single emoji.

Fixes https://github.com/vector-im/riot-web/issues/9916
This commit is contained in:
J. Ryan Stinnett 2019-06-05 18:35:41 +01:00
parent 97019fbfb5
commit 5581b56cfe
2 changed files with 16 additions and 2 deletions
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14
src/HtmlUtils.js
View file

@ -51,6 +51,7 @@ const ZWJ_REGEX = new RegExp("\u200D|\u2003", "g");
const WHITESPACE_REGEX = new RegExp("\\s", "g");
const BIGEMOJI_REGEX = new RegExp(`^(${EMOJIBASE_REGEX.source})+$`, 'i');
const SINGLE_EMOJI_REGEX = new RegExp(`^(${EMOJIBASE_REGEX.source})$`, 'i');
const COLOR_REGEX = /^#[0-9a-fA-F]{6}$/;
@ -63,10 +64,19 @@ const PERMITTED_URL_SCHEMES = ['http', 'https', 'ftp', 'mailto', 'magnet'];
* need emojification.
* unicodeToImage uses this function.
*/
export function containsEmoji(str) {
export function mayContainEmoji(str) {
return SURROGATE_PAIR_PATTERN.test(str) || SYMBOL_PATTERN.test(str);
}
/**
* Returns true if the string definitely contains a single emoji.
* @param {String} str String to test
* @return {Boolean}
*/
export function isSingleEmoji(str) {
return mayContainEmoji(str) && SINGLE_EMOJI_REGEX.test(str);
}
/**
* Returns the shortcode for an emoji character.
*
@ -428,7 +438,7 @@ export function bodyToHtml(content, highlights, opts={}) {
if (opts.stripReplyFallback && formattedBody) formattedBody = ReplyThread.stripHTMLReply(formattedBody);
strippedBody = opts.stripReplyFallback ? ReplyThread.stripPlainReply(content.body) : content.body;
bodyHasEmoji = containsEmoji(isHtmlMessage ? formattedBody : content.body);
bodyHasEmoji = mayContainEmoji(isHtmlMessage ? formattedBody : content.body);
// Only generate safeBody if the message was sent as org.matrix.custom.html
if (isHtmlMessage) {

4
src/components/views/messages/ReactionsRow.js
View file

@ -19,6 +19,7 @@ import PropTypes from 'prop-types';
import sdk from '../../../index';
import { isContentActionable } from '../../../utils/EventUtils';
import { isSingleEmoji } from '../../../HtmlUtils';
import MatrixClientPeg from '../../../MatrixClientPeg';
export default class ReactionsRow extends React.PureComponent {
@ -103,6 +104,9 @@ export default class ReactionsRow extends React.PureComponent {
const ReactionsRowButton = sdk.getComponent('messages.ReactionsRowButton');
const items = reactions.getSortedAnnotationsByKey().map(([content, events]) => {
if (!isSingleEmoji(content)) {
return null;
}
const count = events.size;
if (!count) {
return null;