Custom format remover plugin for CKEditor.

CHANGELOG

@@ -117,6 +117,7 @@ Core:
 - Preparations for the SAML plugin; Fixed caching of main views [#3535].
 - Removed unnecessary OPTIONS request in config [#3541].
 - Added possibility to upload custom fonts for projector and pdf [#3568].
+- Use custom format cleanup plugin for CKEditor [#3576].
 
 Mediafiles:
 - Fixed reloading of PDF on page change [#3274].

openslides/core/static/js/core/remove-format-plugin.js

@@ -0,0 +1,50 @@
+(function () {
+
+'use strict';
+
+angular.module('OpenSlidesApp.core.remove-format-plugin', [
+    'OpenSlidesApp.core',
+])
+
+/*
+ * Plugin for the CKEditor that hooks into the removeformat plugin
+ * which is a default plugin enabled by 'cleanup' in the config
+ * toolbar.
+ * We change the behavior of the removeformat command here:
+ * It should not remove any tags and styles, but only the
+ * 'DISALLOWED_STYLES'. Removeformat traverses through the DOM
+ * and calles for every element the custom filter down below.
+ * We change the element and return false, so the removeformat
+ * plugin does not clean it up.
+ */
+.factory('OSRemoveFormatPlugin', [
+    'Editor',
+    'gettextCatalog',
+    function (Editor, gettextCatalog) {
+        var DISALLOWED_STYLES = ['color', 'background-color'];
+        return {
+            getPlugin: function () {
+                return {
+                    init: function (editor) {
+                        editor.addRemoveFormatFilter(function (element) {
+                            _.forEach(DISALLOWED_STYLES, function (style) {
+                                element.removeStyle(style);
+                            });
+                            return false;
+                        });
+                    },
+                };
+            },
+        };
+    }
+])
+
+.run([
+    'Editor',
+    'OSRemoveFormatPlugin',
+    function (Editor, OSRemoveFormatPlugin, gettext) {
+        Editor.registerPlugin('OSRemoveFormat', OSRemoveFormatPlugin.getPlugin());
+    }
+]);
+
+}());

openslides/core/static/js/core/site.js

@@ -7,6 +7,7 @@ angular.module('OpenSlidesApp.core.site', [
     'OpenSlidesApp.core',
     'OpenSlidesApp.core.start',
     'OpenSlidesApp.core.csv',
+    'OpenSlidesApp.core.remove-format-plugin',
     'OpenSlidesApp.poll.majority',
     'ui.router',
     'colorpicker.module',