From c6f932691d386eba7325d1f96417b59e7a6019ee Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Tue, 13 Apr 2021 23:41:22 +0100
Subject: [PATCH] js: Properly handle shift-click deselection

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 templates/script.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/templates/script.ts b/templates/script.ts
index fd309091..60b07c41 100644
--- a/templates/script.ts
+++ b/templates/script.ts
@@ -987,6 +987,13 @@ function drag_mousedown(e : MouseEvent, shifted: boolean) {
 
   drag_pieces = [];
   if (held == us) {
+    if (shifted) {
+      for (let tpiece of clicked) {
+	let tp = pieces[tpiece]!;
+	do_ungrab(tpiece,tp);
+      }
+      return;
+    }
     dragging = DRAGGING.MAYBE_UNGRAB;
     // contrive to have these first
     for (let piece of clicked) {
-- 
2.30.2