stdin.js

    var win;
    util.yieldable(function () {
    outer:
        while (!win) {
            let _NET_WM_NAME = atom("_NET_WM_NAME");
            let UTF8_STRING = atom("UTF8_STRING");

            let title = window.document.title, mytitle = "{dactyl-window:" + Date.now() + "}";;
            try {
                for (let i in util.range(1, 1000)) {
                    window.document.title = mytitle;
                    yield 5
                    let list = getProperty(scrn.root, atom("_NET_CLIENT_LIST"), atom("WINDOW"), 0, 1024).value;
                    for (let [i, xid] in iter(list)) {
                        let prop = getProperty(xid, _NET_WM_NAME, UTF8_STRING, 0, 1024);
                        try {
                            if (prop && prop.value.readString() === mytitle) {
                                win = xid;
                                break outer;
                            }
                        }
                        catch (e) {}
                    }
                }
            }
            finally {
                window.document.title = title;
            }
            yield 100;
        }

        ready();
    })();