ENGCOM-3054: fix wysiwyg editor not decoding base64 filenames special chars #18215

Author: Stanislav Idolov

lib/web/mage/adminhtml/wysiwyg/tiny_mce/setup.js

@@ -461,7 +461,12 @@ define([
         decodeDirectives: function (content) {
             // escape special chars in directives url to use it in regular expression
             var url = this.makeDirectiveUrl('%directive%').replace(/([$^.?*!+:=()\[\]{}|\\])/g, '\\$1'),
-                reg = new RegExp(url.replace('%directive%', '([a-zA-Z0-9,_-]+)'));
+                reg = new RegExp(url.replace('%directive%', '([a-zA-Z0-9,_-]+)')),
+                uriReg = /___directive\/(.*)\/key\//g;
+
+            content = content.replace(uriReg, function (match) {
+                return decodeURIComponent(match);
+            });
 
             return content.gsub(reg, function (match) { //eslint-disable-line no-extra-bind
                 return Base64.mageDecode(match[1]);