luci-base: ui.js: mark user-changed widgets

Set a `data-changed=true` attribute on the widget element when the user
did any change to the default value.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 5 insertions, 0 deletions

diff --git a/modules/luci-base/htdocs/luci-static/resources/ui.js b/modules/luci-base/htdocs/luci-static/resources/ui.js
index c0b57528fb..99e1548a43 100644
--- a/modules/luci-base/htdocs/luci-static/resources/ui.js
+++ b/modules/luci-base/htdocs/luci-static/resources/ui.js
@@ -70,6 +70,11 @@ var UIElement = L.Class.extend({
 	},
 
 	setChangeEvents: function(targetNode /*, ... */) {
+		var tag_changed = L.bind(function(ev) { this.setAttribute('data-changed', true) }, this.node);
+
+		for (var i = 1; i < arguments.length; i++)
+			targetNode.addEventListener(arguments[i], tag_changed);
+
 		this.registerEvents(targetNode, 'widget-change', this.varargs(arguments, 1));
 	}
 });