about vscode api for executeCommand("explorer.newFolder") - visual-studio-code

Question

I want callback for after newFolder,
executeCommand("explorer.newFolder").then(value => console.log(value))
but The value is not the value of folderName.

Answer 1

I analyzed the code of the command you executed.
The explorer.newFolder command is defined as NEW_FOLDER_COMMAND_ID, and is connected with the openExplorerAndCreate handler. (The result is received through the handler of CommndsRegistry.)
The return of the openExplorerAndCreateis a callback function (Promise).
When i look closely inside,, if the input parameter is not isFolder, that is, if it is a file, a callback function is provided by the return commandService.executeCommand(NEW_UNTITLED_FILE_COMMAND_ID); command.\
but if it is a folder, there is no return value. That is undifined.
in vscode API documentation
return type of executeCommand() is Thenable<T | undefined>. That is, in the case of the corresponding command, it is returned as undefined, not Thenable<T>. If an error is not thrown and undefined is returned, it can be determined that it has been normally executed.
// src/vs/workbench/contrib/files/browser/fileAction.ts
...
export const NEW_FOLDER_COMMAND_ID = 'explorer.newFolder';
...
CommandsRegistry.registerCommand({
id: NEW_FOLDER_COMMAND_ID,
handler: async (accessor) => {
await openExplorerAndCreate(accessor, true);
}
});
...
async function openExplorerAndCreate(accessor: ServicesAccessor, isFolder: boolean): Promise<void> {
const explorerService = accessor.get(IExplorerService);
const fileService = accessor.get(IFileService);
const editorService = accessor.get(IEditorService);
const viewsService = accessor.get(IViewsService);
const notificationService = accessor.get(INotificationService);
const commandService = accessor.get(ICommandService);
const wasHidden = !viewsService.isViewVisible(VIEW_ID);
const view = await viewsService.openView(VIEW_ID, true);
if (wasHidden) {
// Give explorer some time to resolve itself #111218
await timeout(500);
}
if (!view) {
// Can happen in empty workspace case (https://github.com/microsoft/vscode/issues/100604)
if (isFolder) {
throw new Error('Open a folder or workspace first.');
}
return commandService.executeCommand(NEW_UNTITLED_FILE_COMMAND_ID);
}
const stats = explorerService.getContext(false);
const stat = stats.length > 0 ? stats[0] : undefined;
let folder: ExplorerItem;
if (stat) {
folder = stat.isDirectory ? stat : (stat.parent || explorerService.roots[0]);
} else {
folder = explorerService.roots[0];
}
if (folder.isReadonly) {
throw new Error('Parent folder is readonly.');
}
const newStat = new NewExplorerItem(fileService, folder, isFolder);
folder.addChild(newStat);
const onSuccess = async (value: string): Promise<void> => {
try {
const resourceToCreate = resources.joinPath(folder.resource, value);
await explorerService.applyBulkEdit([new ResourceFileEdit(undefined, resourceToCreate, { folder: isFolder })], {
undoLabel: nls.localize('createBulkEdit', "Create {0}", value),
progressLabel: nls.localize('creatingBulkEdit', "Creating {0}", value)
});
await refreshIfSeparator(value, explorerService);
if (isFolder) {
await explorerService.select(resourceToCreate, true);
} else {
await editorService.openEditor({ resource: resourceToCreate, options: { pinned: true } });
}
} catch (error) {
onErrorWithRetry(notificationService, error, () => onSuccess(value));
}
};
await explorerService.setEditable(newStat, {
validationMessage: value => validateFileName(newStat, value),
onFinish: async (value, success) => {
folder.removeChild(newStat);
await explorerService.setEditable(newStat, null);
if (success) {
onSuccess(value);
}
}
});
}