Detect when document is closed

Question

I'm working on Visual Studio Code extension and I need to detect when some document window is closed. I know about vscode.workspace.onDidCloseTextDocument event and it works at general.

But if I open a file from the workspace via API:

vscode.workspace.openTextDocument(localPath).then(function (doc) {
    vscode.window.showTextDocument(doc, 1);
});

and then close it, the onDidCloseTextDocument doesn't fire as usual. Its fire but few minutes later.

I know if this is some bug or this is the way VSCode works but I need to know how to detect when document window is closed.

I was reading that opening file via API is some kind of "virtual" file. So, probably this cause the problem.

Answer 1

sadly there is no way to catch the document close atm because believe it or not onDidCloseTextDocument fires for more than just closing the file, to test add the below to ur ext active

vscode.workspace.onDidCloseTextDocument((doc) => {
    console.log(doc)
})

and watch the magic in the console.

apart from the totally unrelated documentation

To add an event listener when a visible text document is closed,

use the TextEditor events in the window namespace.

there is no close event on the window namespace https://code.visualstudio.com/api/references/vscode-api#window maybe am blind but if anyone found it plz add it here.

also the isClosed prop on the document is not reliable, because its actually true when you open a document.

Answer 2

private _subscriptions: vscode.Disposable;

constructor() {

    // Listen to closeTextDocument
    this._subscriptions = vscode.workspace.onDidCloseTextDocument(
        // your code here
    );
}

dispose() {
    this._subscriptions.dispose();
}