VS Code: check whether the file explorer is shown?

I'm using an extension that calls commands.executeCommand('revealInExplorer');. This switches the left sidebar to the file explorer and then reveals the current file in the file tree. However, I want this to happen only when the explorer is currently visible. E.g. when I'm in the search view, I don't want the extension to call commands.executeCommand('revealInExplorer');. How can I do this?

The extension is "Auto-Collapse Explorer":

const { window, commands } = require('vscode');

const COLLAPSE = 'workbench.files.action.collapseExplorerFolders';
const REVEAL = 'revealInExplorer';

function activate(context) {
  const subscription = window.onDidChangeActiveTextEditor(showOnlyCurrentFile);
  context.subscriptions.push(subscription);
  showOnlyCurrentFile();
}

async function showOnlyCurrentFile() {
  await commands.executeCommand(COLLAPSE);
  await commands.executeCommand(REVEAL);
  if (!window.activeTextEditor) return;
  window.showTextDocument(window.activeTextEditor.document);
}

function deactivate() {}

module.exports = {
  activate,
  deactivate
};

from VS Code: check whether the file explorer is shown?