Add focus/blur listener in IntelliJ plugin

Question

How can I listen for focus/blur events of all edtitors in an IntelliJ plugin?

Answer 1

Get EditorEventMulticasterEx using getEventMulticaster method, and then use its addFocusChangeListener method:

Disposable disposable = () -> {};  // or your custom disposable

EditorEventMulticasterEx editorEventMulticaster =
        (EditorEventMulticasterEx) EditorFactory.getInstance().getEventMulticaster();

editorEventMulticaster.addFocusChangeListener(new FocusChangeListener() {
    @Override
    public void focusGained(@NotNull Editor editor) {
        // handle focus event
    }

    @Override
    public void focusLost(@NotNull Editor editor) {
        // handle blur event
    }
}, disposable);