function minimizeAllWindows() {
    var allClients = workspace.clientList();
    var relevantClients = [];
    var minimize = false;

    for (var i = 0; i < allClients.length; ++i) {
        if (!isRelevant(allClients[i])) {
            continue;
        }
        if (!allClients[i].minimized) {
            minimize = true;
        }
        relevantClients.push(allClients[i]);
    }

    for (var i = 0; i < relevantClients.length; ++i) {
        var wasMinimizedByScript = relevantClients[i].minimizedByScript;
        delete relevantClients[i].minimizedByScript;

        if (minimize) {
            if (relevantClients[i].minimized) {
                continue;
            }
            relevantClients[i].minimized = true;
            relevantClients[i].minimizedByScript = true;
        } else {
            if (!wasMinimizedByScript) {
                continue;
            }
            relevantClients[i].minimized = false;
        }
    }
}