/**
* Copyright 2008-2016 Qualogy Solutions B.V.
*
* 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.qualogy.qafe.gwt.client.util;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Element;
/**
* Utilities class for adding functionality to DOM before they are integrated
* into Google Web Toolkit.
*/
public class GWTDomUtil {
/**
* Helper class to add a css element to the head of the document.
*
* @param cssUrl
* The url of the css file.
*/
public static void addCSS(String cssUrl) {
Element head = getElementByTagName("head");
Element cssLink = DOM.createElement("link");
setAttribute(cssLink, "type", "text/css");
setAttribute(cssLink, "rel", "stylesheet");
setAttribute(cssLink, "href", cssUrl);
DOM.appendChild(head, cssLink);
}
/**
* @param el
* The element to modify the attribute of.
* @param key
* The key, or name of the attribute.
* @param val
* The value of the attribute.
*/
public native static void setAttribute(Element el, String key, String val) /*-{
el.setAttribute(key, val);
}-*/;
/**
* Gets an element by its tag name; handy for single elements like HTML,
* HEAD, BODY.
*
* @param tagName
* The name of the tag.
* @return The element with that tag name.
*/
public native static Element getElementByTagName(String tagName) /*-{
var elem = $doc.getElementsByTagName(tagName);
return elem ? elem[0] : null;
}-*/;
}