com.gargoylesoftware.htmlunit.javascript.host.html.HTMLLabelElement Maven / Gradle / Ivy

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A headless browser intended for use in testing web-based applications.
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/*
 * Copyright (c) 2002-2018 Gargoyle Software Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.gargoylesoftware.htmlunit.javascript.host.html;

import static com.gargoylesoftware.htmlunit.BrowserVersionFeatures.JS_LABEL_FORM_NULL;
import static com.gargoylesoftware.htmlunit.javascript.configuration.SupportedBrowser.CHROME;
import static com.gargoylesoftware.htmlunit.javascript.configuration.SupportedBrowser.EDGE;
import static com.gargoylesoftware.htmlunit.javascript.configuration.SupportedBrowser.FF;

import org.apache.commons.lang3.StringUtils;
import org.w3c.dom.Element;

import com.gargoylesoftware.htmlunit.html.HtmlElement;
import com.gargoylesoftware.htmlunit.html.HtmlForm;
import com.gargoylesoftware.htmlunit.html.HtmlLabel;
import com.gargoylesoftware.htmlunit.javascript.configuration.JsxClass;
import com.gargoylesoftware.htmlunit.javascript.configuration.JsxConstructor;
import com.gargoylesoftware.htmlunit.javascript.configuration.JsxGetter;
import com.gargoylesoftware.htmlunit.javascript.configuration.JsxSetter;

/**
 * A JavaScript object for {@code HTMLLabelElement}.
 *
 * @author Ahmed Ashour
 * @author Ronald Brill
 */
@JsxClass(domClass = HtmlLabel.class)
public class HTMLLabelElement extends HTMLElement {

    /**
     * Creates an instance.
     */
    @JsxConstructor({CHROME, FF, EDGE})
    public HTMLLabelElement() {
    }

    /**
     * Retrieves the object to which the given label object is assigned.
     * @return the identifier of the element to which the label element is assigned
     */
    @JsxGetter
    public String getHtmlFor() {
        return ((HtmlLabel) getDomNodeOrDie()).getForAttribute();
    }

    /**
     * Sets or retrieves the object to which the given label object is assigned.
     * @param id Specifies the identifier of the element to which the label element is assigned
     * @see MSDN Documentation
     */
    @JsxSetter
    public void setHtmlFor(final String id) {
        ((HtmlLabel) getDomNodeOrDie()).setAttribute("for", id);
    }

    /**
     * @return the HTMLElement to which the given label object is assigned
     */
    @JsxGetter({CHROME, FF})
    public HTMLElement getControl() {
        final String id = getHtmlFor();
        if (StringUtils.isBlank(id)) {
            return null;
        }
        final HtmlElement htmlElem = getDomNodeOrDie();
        final Element elem = htmlElem.getPage().getElementById(id);
        if (null == elem || !(elem instanceof HtmlElement)) {
            return null;
        }
        return (HTMLElement) ((HtmlElement) elem).getScriptableObject();
    }

    /**
     * Returns the value of the JavaScript {@code form} attribute.
     *
     * @return the value of the JavaScript {@code form} attribute
     */
    @JsxGetter
    public HTMLFormElement getForm() {
        if (getBrowserVersion().hasFeature(JS_LABEL_FORM_NULL)) {
            return null;
        }
        final HtmlForm form = getDomNodeOrDie().getEnclosingForm();
        if (form == null) {
            return null;
        }
        return (HTMLFormElement) getScriptableFor(form);
    }
}