From dc9ffb0d74c7c2c8d83e7dbaa2dcd358e1f5e412 Mon Sep 17 00:00:00 2001
From: Thomas Weber <weber_t@mailbox.org>
Date: Thu, 24 Dec 2020 18:28:27 -0600
Subject: [PATCH] saveProjectSb3 should tell the GUI whether this project uses
 any TW-exclusive blocks

---
 src/virtual-machine.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/virtual-machine.js b/src/virtual-machine.js
index f1448aa6..b0bb5229 100644
--- a/src/virtual-machine.js
+++ b/src/virtual-machine.js
@@ -444,6 +444,10 @@ class VirtualMachine extends EventEmitter {
             compressionOptions: {
                 level: 6 // Tradeoff between best speed (1) and best compression (9)
             }
+        }).then(result => {
+            // tw: We want to let the GUI know whether this project uses block that won't work in Scratch.
+            result.usesExtendedExtensions = JSON.parse(projectJson).extensions.includes('tw');
+            return result;
         });
     }