[FIX] IE11 - callback createTreeWalker doesnt accept acceptNo… (#15157)

app/emoji/client/emojiParser.js

@@ -3,6 +3,7 @@ import { Meteor } from 'meteor/meteor';
 import { Tracker } from 'meteor/tracker';
 
 import { getUserPreference } from '../../utils';
+import { isIE11 } from '../../ui-utils/client/lib/isIE11';
 import { callbacks } from '../../callbacks';
 import { emoji } from '../lib/rocketchat';
 
@@ -32,11 +33,10 @@ Tracker.autorun(() => {
 
 			const emojis = Array.from(checkEmojiOnly.querySelectorAll('.emoji:not(:empty), .emojione:not(:empty)'));
 
-			const walker = document.createTreeWalker(
-				checkEmojiOnly,
-				NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_TEXT,
-				{
-					acceptNode: (node) => {
+			let hasText = false;
+
+			if (!isIE11()) {
+				const filter = (node) => {
 					if (node.nodeType === Node.ELEMENT_NODE && (
 						node.classList.contains('emojione')
 							|| node.classList.contains('emoji')
@@ -44,11 +44,14 @@ Tracker.autorun(() => {
 						return NodeFilter.FILTER_REJECT;
 					}
 					return NodeFilter.FILTER_ACCEPT;
-					},
-				},
+				};
+
+				const walker = document.createTreeWalker(
+					checkEmojiOnly,
+					NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_TEXT,
+					filter
 				);
 
-			let hasText = false;
 
 				while (walker.nextNode()) {
 					if (walker.currentNode.nodeType === Node.TEXT_NODE && walker.currentNode.nodeValue.trim() !== '') {
@@ -56,7 +59,6 @@ Tracker.autorun(() => {
 						break;
 					}
 				}
-
 				const emojiOnly = emojis.length && !hasText;
 
 				if (emojiOnly) {
@@ -66,6 +68,8 @@ Tracker.autorun(() => {
 					}
 					html = checkEmojiOnly.innerHTML;
 				}
+			}
+
 
 			// apostrophe (') back to '
 			html = html.replace(/\'/g, ''');

app/markdown/lib/parser/original/markdown.js

@@ -23,7 +23,7 @@ const parseNotEscaped = function(msg, message) {
 		return token;
 	};
 
-	const schemes = settings.get('Markdown_SupportSchemesForLink').split(',').join('|');
+	const schemes = (settings.get('Markdown_SupportSchemesForLink') || '').split(',').join('|');
 
 	if (settings.get('Markdown_Headers')) {
 		// Support # Text for h1

app/ui-utils/client/lib/isIE11.js

@@ -0,0 +1,15 @@
+export const isIE11 = () => {
+	const { userAgent } = window.navigator;
+	const msieIdx = userAgent.indexOf('MSIE');
+
+	if (msieIdx > 0) {
+		return parseInt(userAgent.substring(msieIdx + 5, userAgent.indexOf('.', msieIdx))) === 11;
+	}
+
+	// If MSIE detection fails, check the Trident engine version
+	if (navigator.userAgent.match(/Trident\/7\./)) {
+		return true;
+	}
+
+	return false;
+};

imports/client/@rocket.chat/apps-engine

@@ -0,0 +1 @@
+../../../node_modules/@rocket.chat/apps-engine