v12 (#5712)

Co-authored-by: MeiMei <30769358+mei23@users.noreply.github.com>
Co-authored-by: Satsuki Yanagi <17376330+u1-liquid@users.noreply.github.com>

src/client/scripts/select-drive-file.ts

@@ -0,0 +1,12 @@
+import DriveWindow from '../components/drive-window.vue';
+
+export function selectDriveFile($root: any, multiple) {
+	return new Promise((res, rej) => {
+		const w = $root.new(DriveWindow, {
+			multiple
+		});
+		w.$once('selected', files => {
+			res(multiple ? files : files[0]);
+		});
+	});
+}