From 7fd5baf55982617212ec242c7f325b77f414570a Mon Sep 17 00:00:00 2001
From: Owen Mills <owenmills@live.ca>
Date: Sat, 23 Nov 2024 14:54:49 +0000
Subject: [PATCH] #1897: Prevent multi-select of non-draggable and filtered
 items

---
 plugins/MultiDrag/MultiDrag.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/plugins/MultiDrag/MultiDrag.js b/plugins/MultiDrag/MultiDrag.js
index 2845f0d00..672a38aef 100644
--- a/plugins/MultiDrag/MultiDrag.js
+++ b/plugins/MultiDrag/MultiDrag.js
@@ -342,8 +342,19 @@ function MultiDragPlugin() {
 								n = lastIndex + 1;
 							}
 
+							const filter = options.filter;
+
 							for (; i < n; i++) {
 								if (~multiDragElements.indexOf(children[i])) continue;
+								// Check if element is draggable
+								if (!closest(children[i], options.draggable, parentEl, false)) continue;
+								// Check if element is filtered
+								const filtered = filter && (typeof filter === 'function' ?
+									filter.call(sortable, evt, children[i], sortable) :
+									filter.split(',').some((criteria) => {
+										return closest(children[i], criteria.trim(), parentEl, false);
+									}));
+								if (filtered) continue;
 								toggleClass(children[i], options.selectedClass, true);
 								multiDragElements.push(children[i]);