Java 类org.w3c.dom.html.HTMLInputElement 实例源码

private Element showHideCheckbox(String label, String className, boolean initiallyHidden) {
    Element LI = document.createElement("LI");
    HTMLInputElement checkbox = (HTMLInputElement) document.createElement("input");
    LI.appendChild(checkbox);
    LI.appendChild(document.createTextNode(label));
    checkbox.setAttribute("type", "checkbox");
    String arglist = "('" + className + "')";
    String show = "show_nodes_of_class" + arglist;
    String hide = "hide_nodes_of_class" + arglist;
    checkbox.setAttribute("onchange", "if (this.checked) {" + hide + "} else {" + show + "}");
    checkbox.setChecked(initiallyHidden);
    return LI;
}

@Override
public Optional<String> getValue() {
    String value = null;
    if (element instanceof HTMLInputElement) {
        value = ((HTMLInputElement) element).getValue();
    } else if (element instanceof HTMLOptionElement) {
        value = ((HTMLOptionElement) element).getValue();
    }
    return value == null || value.isEmpty() ? Optional.empty() : Optional.of(value);
}

@Override
public Element setValue(String value) {
    if (element instanceof HTMLInputElement) {
        ((HTMLInputElement) element).setValue(value);
    } else if (element instanceof HTMLOptionElement) {
        ((HTMLOptionElement) element).setValue(value);
    }
    return this;
}

public UserCredentials(HTMLInputElement username, HTMLInputElement password){
    this.username = username;
    this.password = password;
}