1 files changed, 48 insertions, 0 deletions
diff --git a/vendor/oojs/oojs-ui/src/widgets/ItemWidget.js b/vendor/oojs/oojs-ui/src/widgets/ItemWidget.js
new file mode 100644
index 00000000..292514f4
--- /dev/null
+++ b/vendor/oojs/oojs-ui/src/widgets/ItemWidget.js
@@ -0,0 +1,48 @@
+/**
+ * Mixin for widgets used as items in widgets that inherit OO.ui.GroupWidget.
+ *
+ * Item widgets have a reference to a OO.ui.GroupWidget while they are attached to the group. This
+ * allows bidirectional communication.
+ *
+ * Use together with OO.ui.GroupWidget to make disabled state inheritable.
+ *
+ * @private
+ * @abstract
+ * @class
+ *
+ * @constructor
+ */
+OO.ui.ItemWidget = function OoUiItemWidget() {
+	//
+};
+
+/* Methods */
+
+/**
+ * Check if widget is disabled.
+ *
+ * Checks parent if present, making disabled state inheritable.
+ *
+ * @return {boolean} Widget is disabled
+ */
+OO.ui.ItemWidget.prototype.isDisabled = function () {
+	return this.disabled ||
+		( this.elementGroup instanceof OO.ui.Widget && this.elementGroup.isDisabled() );
+};
+
+/**
+ * Set group element is in.
+ *
+ * @param {OO.ui.GroupElement|null} group Group element, null if none
+ * @chainable
+ */
+OO.ui.ItemWidget.prototype.setElementGroup = function ( group ) {
+	// Parent method
+	// Note: Calling #setElementGroup this way assumes this is mixed into an OO.ui.Element
+	OO.ui.Element.prototype.setElementGroup.call( this, group );
+
+	// Initialize item disabled states
+	this.updateDisabled();
+
+	return this;
+};