Vendor things

third-party/vendor/web-sys/webidls/unstable/FileSystemAccess.webidl

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+enum FileSystemPermissionMode {
+  "read",
+  "readwrite"
+};
+
+dictionary FileSystemPermissionDescriptor : PermissionDescriptor {
+  required FileSystemHandle handle;
+  FileSystemPermissionMode mode = "read";
+};
+
+dictionary FileSystemHandlePermissionDescriptor {
+  FileSystemPermissionMode mode = "read";
+};
+
+[Exposed=(Window,Worker), SecureContext, Serializable]
+partial interface FileSystemHandle {
+  Promise<PermissionState> queryPermission(optional FileSystemHandlePermissionDescriptor descriptor = {});
+  Promise<PermissionState> requestPermission(optional FileSystemHandlePermissionDescriptor descriptor = {});
+};
+
+enum WellKnownDirectory {
+  "desktop",
+  "documents",
+  "downloads",
+  "music",
+  "pictures",
+  "videos",
+};
+
+typedef (WellKnownDirectory or FileSystemHandle) StartInDirectory;
+
+dictionary FilePickerAcceptType {
+    USVString description = "";
+    record<USVString, (USVString or sequence<USVString>)> accept;
+};
+
+dictionary FilePickerOptions {
+    sequence<FilePickerAcceptType> types;
+    boolean excludeAcceptAllOption = false;
+    DOMString id;
+    StartInDirectory startIn;
+};
+
+dictionary OpenFilePickerOptions : FilePickerOptions {
+    boolean multiple = false;
+};
+
+dictionary SaveFilePickerOptions : FilePickerOptions {
+    USVString? suggestedName;
+};
+
+dictionary DirectoryPickerOptions {
+    DOMString id;
+    StartInDirectory startIn;
+    FileSystemPermissionMode mode = "read";
+};
+
+[SecureContext]
+partial interface Window {
+    [Throws]
+    Promise<sequence<FileSystemFileHandle>> showOpenFilePicker(optional OpenFilePickerOptions options = {});
+    [Throws]
+    Promise<FileSystemFileHandle> showSaveFilePicker(optional SaveFilePickerOptions options = {});
+    [Throws]
+    Promise<FileSystemDirectoryHandle> showDirectoryPicker(optional DirectoryPickerOptions options = {});
+};
+
+partial interface DataTransferItem {
+    Promise<FileSystemHandle?> getAsFileSystemHandle();
+};