diff -r 000000000000 -r bca7a7e058a3 src/pyams_skin/resources/js/ext/tinymce/dev/classes/ui/MessageBox.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pyams_skin/resources/js/ext/tinymce/dev/classes/ui/MessageBox.js	Thu Feb 13 11:43:31 2020 +0100
@@ -0,0 +1,202 @@
+/**
+ * MessageBox.js
+ *
+ * Copyright, Moxiecode Systems AB
+ * Released under LGPL License.
+ *
+ * License: http://www.tinymce.com/license
+ * Contributing: http://www.tinymce.com/contributing
+ */
+
+/**
+ * This class is used to create MessageBoxes like alerts/confirms etc.
+ *
+ * @class tinymce.ui.MessageBox
+ * @extends tinymce.ui.Window
+ */
+define("tinymce/ui/MessageBox", [
+	"tinymce/ui/Window"
+], function(Window) {
+	"use strict";
+
+	var MessageBox = Window.extend({
+		/**
+		 * Constructs a instance with the specified settings.
+		 *
+		 * @constructor
+		 * @param {Object} settings Name/value object with settings.
+		 */
+		init: function(settings) {
+			settings = {
+				border: 1,
+				padding: 20,
+				layout: 'flex',
+				pack: "center",
+				align: "center",
+				containerCls: 'panel',
+				autoScroll: true,
+				buttons: {type: "button", text: "Ok", action: "ok"},
+				items: {
+					type: "label",
+					multiline: true,
+					maxWidth: 500,
+					maxHeight: 200
+				}
+			};
+
+			this._super(settings);
+		},
+
+		Statics: {
+			/**
+			 * Ok buttons constant.
+			 *
+			 * @static
+			 * @final
+			 * @field {Number} OK
+			 */
+			OK: 1,
+
+			/**
+			 * Ok/cancel buttons constant.
+			 *
+			 * @static
+			 * @final
+			 * @field {Number} OK_CANCEL
+			 */
+			OK_CANCEL: 2,
+
+			/**
+			 * yes/no buttons constant.
+			 *
+			 * @static
+			 * @final
+			 * @field {Number} YES_NO
+			 */
+			YES_NO: 3,
+
+			/**
+			 * yes/no/cancel buttons constant.
+			 *
+			 * @static
+			 * @final
+			 * @field {Number} YES_NO_CANCEL
+			 */
+			YES_NO_CANCEL: 4,
+
+			/**
+			 * Constructs a new message box and renders it to the body element.
+			 *
+			 * @static
+			 * @method msgBox
+			 * @param {Object} settings Name/value object with settings.
+			 */
+			msgBox: function(settings) {
+				var buttons, callback = settings.callback || function() {};
+
+				function createButton(text, status, primary) {
+					return {
+						type: "button",
+						text: text,
+						subtype: primary ? 'primary' : '',
+						onClick: function(e) {
+							e.control.parents()[1].close();
+							callback(status);
+						}
+					};
+				}
+
+				switch (settings.buttons) {
+					case MessageBox.OK_CANCEL:
+						buttons = [
+							createButton('Ok', true, true),
+							createButton('Cancel', false)
+						];
+						break;
+
+					case MessageBox.YES_NO:
+					case MessageBox.YES_NO_CANCEL:
+						buttons = [
+							createButton('Yes', 1, true),
+							createButton('No', 0)
+						];
+
+						if (settings.buttons == MessageBox.YES_NO_CANCEL) {
+							buttons.push(createButton('Cancel', -1));
+						}
+						break;
+
+					default:
+						buttons = [
+							createButton('Ok', true, true)
+						];
+						break;
+				}
+
+				return new Window({
+					padding: 20,
+					x: settings.x,
+					y: settings.y,
+					minWidth: 300,
+					minHeight: 100,
+					layout: "flex",
+					pack: "center",
+					align: "center",
+					buttons: buttons,
+					title: settings.title,
+					role: 'alertdialog',
+					items: {
+						type: "label",
+						multiline: true,
+						maxWidth: 500,
+						maxHeight: 200,
+						text: settings.text
+					},
+					onPostRender: function() {
+						this.aria('describedby', this.items()[0]._id);
+					},
+					onClose: settings.onClose,
+					onCancel: function() {
+						callback(false);
+					}
+				}).renderTo(document.body).reflow();
+			},
+
+			/**
+			 * Creates a new alert dialog.
+			 *
+			 * @method alert
+			 * @param {Object} settings Settings for the alert dialog.
+			 * @param {function} [callback] Callback to execute when the user makes a choice.
+			 */
+			alert: function(settings, callback) {
+				if (typeof settings == "string") {
+					settings = {text: settings};
+				}
+
+				settings.callback = callback;
+				return MessageBox.msgBox(settings);
+			},
+
+			/**
+			 * Creates a new confirm dialog.
+			 *
+			 * @method confirm
+			 * @param {Object} settings Settings for the confirm dialog.
+			 * @param {function} [callback] Callback to execute when the user makes a choice.
+			 */
+			confirm: function(settings, callback) {
+				if (typeof settings == "string") {
+					settings = {text: settings};
+				}
+
+				settings.callback = callback;
+				settings.buttons = MessageBox.OK_CANCEL;
+
+				return MessageBox.msgBox(settings);
+			}
+		}
+	});
+
+	return MessageBox;
+});
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