web client: ignore navigation events when UI is blocked

eliminates race condition when sorting list elements by dragging from
an anchor

1 files changed, 20 insertions, 0 deletions

diff --git a/web/blocking.js b/web/blocking.js
new file mode 100644
index 0000000..d45992f
--- /dev/null
+++ b/web/blocking.js
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2012-2015 Kaarle Ritvanen
+ * See LICENSE file for license details
+ */
+
+define(["jquery", "jquery-blockui"], function($) {
+    var enabled = false;
+
+    return {
+	enable: function() {
+	    $.blockUI();
+	    enabled = true;
+	},
+	disable: function() {
+	    $.unblockUI();
+	    enabled = false;
+	},
+	isEnabled: function() { return enabled; }
+    };
+});