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diff --git a/vendor/oojs/oojs-ui/src/Widget.js b/vendor/oojs/oojs-ui/src/Widget.js
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index 00000000..4929e055
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+++ b/vendor/oojs/oojs-ui/src/Widget.js
@@ -0,0 +1,102 @@
+/**
+ * Widgets are compositions of one or more OOjs UI elements that users can both view
+ * and interact with. All widgets can be configured and modified via a standard API,
+ * and their state can change dynamically according to a model.
+ *
+ * @abstract
+ * @class
+ * @extends OO.ui.Element
+ * @mixins OO.EventEmitter
+ *
+ * @constructor
+ * @param {Object} [config] Configuration options
+ * @cfg {boolean} [disabled=false] Disable the widget. Disabled widgets cannot be used and their
+ *  appearance reflects this state.
+ */
+OO.ui.Widget = function OoUiWidget( config ) {
+	// Initialize config
+	config = $.extend( { disabled: false }, config );
+
+	// Parent constructor
+	OO.ui.Widget.super.call( this, config );
+
+	// Mixin constructors
+	OO.EventEmitter.call( this );
+
+	// Properties
+	this.disabled = null;
+	this.wasDisabled = null;
+
+	// Initialization
+	this.$element.addClass( 'oo-ui-widget' );
+	this.setDisabled( !!config.disabled );
+};
+
+/* Setup */
+
+OO.inheritClass( OO.ui.Widget, OO.ui.Element );
+OO.mixinClass( OO.ui.Widget, OO.EventEmitter );
+
+/* Events */
+
+/**
+ * @event disable
+ *
+ * A 'disable' event is emitted when a widget is disabled.
+ *
+ * @param {boolean} disabled Widget is disabled
+ */
+
+/**
+ * @event toggle
+ *
+ * A 'toggle' event is emitted when the visibility of the widget changes.
+ *
+ * @param {boolean} visible Widget is visible
+ */
+
+/* Methods */
+
+/**
+ * Check if the widget is disabled.
+ *
+ * @return {boolean} Widget is disabled
+ */
+OO.ui.Widget.prototype.isDisabled = function () {
+	return this.disabled;
+};
+
+/**
+ * Set the 'disabled' state of the widget.
+ *
+ * When a widget is disabled, it cannot be used and its appearance is updated to reflect this state.
+ *
+ * @param {boolean} disabled Disable widget
+ * @chainable
+ */
+OO.ui.Widget.prototype.setDisabled = function ( disabled ) {
+	var isDisabled;
+
+	this.disabled = !!disabled;
+	isDisabled = this.isDisabled();
+	if ( isDisabled !== this.wasDisabled ) {
+		this.$element.toggleClass( 'oo-ui-widget-disabled', isDisabled );
+		this.$element.toggleClass( 'oo-ui-widget-enabled', !isDisabled );
+		this.$element.attr( 'aria-disabled', isDisabled.toString() );
+		this.emit( 'disable', isDisabled );
+		this.updateThemeClasses();
+	}
+	this.wasDisabled = isDisabled;
+
+	return this;
+};
+
+/**
+ * Update the disabled state, in case of changes in parent widget.
+ *
+ * @chainable
+ */
+OO.ui.Widget.prototype.updateDisabled = function () {
+	this.setDisabled( this.disabled );
+	return this;
+};