1 files changed, 84 insertions, 0 deletions
diff --git a/vendor/oojs/oojs-ui/src/elements/PendingElement.js b/vendor/oojs/oojs-ui/src/elements/PendingElement.js
new file mode 100644
index 00000000..c5f71d54
--- /dev/null
+++ b/vendor/oojs/oojs-ui/src/elements/PendingElement.js
@@ -0,0 +1,84 @@
+/**
+ * Element that can be marked as pending.
+ *
+ * @abstract
+ * @class
+ *
+ * @constructor
+ * @param {Object} [config] Configuration options
+ * @cfg {jQuery} [$pending] Element to mark as pending, defaults to this.$element
+ */
+OO.ui.PendingElement = function OoUiPendingElement( config ) {
+	// Configuration initialization
+	config = config || {};
+
+	// Properties
+	this.pending = 0;
+	this.$pending = null;
+
+	// Initialisation
+	this.setPendingElement( config.$pending || this.$element );
+};
+
+/* Setup */
+
+OO.initClass( OO.ui.PendingElement );
+
+/* Methods */
+
+/**
+ * Set the pending element (and clean up any existing one).
+ *
+ * @param {jQuery} $pending The element to set to pending.
+ */
+OO.ui.PendingElement.prototype.setPendingElement = function ( $pending ) {
+	if ( this.$pending ) {
+		this.$pending.removeClass( 'oo-ui-pendingElement-pending' );
+	}
+
+	this.$pending = $pending;
+	if ( this.pending > 0 ) {
+		this.$pending.addClass( 'oo-ui-pendingElement-pending' );
+	}
+};
+
+/**
+ * Check if input is pending.
+ *
+ * @return {boolean}
+ */
+OO.ui.PendingElement.prototype.isPending = function () {
+	return !!this.pending;
+};
+
+/**
+ * Increase the pending stack.
+ *
+ * @chainable
+ */
+OO.ui.PendingElement.prototype.pushPending = function () {
+	if ( this.pending === 0 ) {
+		this.$pending.addClass( 'oo-ui-pendingElement-pending' );
+		this.updateThemeClasses();
+	}
+	this.pending++;
+
+	return this;
+};
+
+/**
+ * Reduce the pending stack.
+ *
+ * Clamped at zero.
+ *
+ * @chainable
+ */
+OO.ui.PendingElement.prototype.popPending = function () {
+	if ( this.pending === 1 ) {
+		this.$pending.removeClass( 'oo-ui-pendingElement-pending' );
+		this.updateThemeClasses();
+	}
+	this.pending = Math.max( 0, this.pending - 1 );
+
+	return this;
+};