From 5d7dfa4dbf1fa2a0f56c561d08fa6962e97cef26 Mon Sep 17 00:00:00 2001
From: MURAOKA Taro <koron.kaoriya@gmail.com>
Date: Thu, 14 Aug 2025 13:56:30 +0900
Subject: [PATCH] Added a button to open the Origin Private File System

For more information about the OPFS, see:
https://developer.mozilla.org/en-US/docs/Web/API/File_System_API/Origin_private_file_system
---
 schema/plugin.json |  1 +
 src/index.ts       | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/schema/plugin.json b/schema/plugin.json
index 8a4b9e4..a7a9be6 100644
--- a/schema/plugin.json
+++ b/schema/plugin.json
@@ -4,6 +4,7 @@
   "jupyter.lab.toolbars": {
     "FileSystemAccess": [
       { "name": "open-folder", "rank": 0 },
+      { "name": "open-opfs", "rank": 5 },
       { "name": "uploader", "rank": 10 },
       { "name": "filename-searcher", "rank": 20 }
     ]
diff --git a/src/index.ts b/src/index.ts
index 432e5b5..e95db92 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -23,6 +23,7 @@ import { ITranslator, nullTranslator } from '@jupyterlab/translation';
 import {
   listIcon,
   folderIcon,
+  trustedIcon,
   IScore,
   FilenameSearcher
 } from '@jupyterlab/ui-components';
@@ -116,6 +117,25 @@ const plugin: JupyterFrontEndPlugin<void> = {
         }
       );
 
+      toolbarRegistry.addFactory(
+        DRIVE_NAME,
+        'open-opfs',
+        (browser: FileBrowser) => {
+          const openOPFSButton = new ToolbarButton({
+            icon: trustedIcon,
+            onClick: async () => {
+              const directoryHandle = await navigator.storage.getDirectory();
+              if (directoryHandle) {
+                drive.rootHandle = directoryHandle;
+                widget.model.cd('/');
+              }
+            },
+            tooltip: trans.__('Open the Origin Private File System')
+          });
+          return openOPFSButton;
+        }
+      );
+
       toolbarRegistry.addFactory(
         DRIVE_NAME,
         'uploader',