001/*
002 * (C) Copyright 2006-2008 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Alexandre Russel
018 *
019 * $Id$
020 */
021
022package org.nuxeo.ecm.platform.annotations.gwt.client.util;
023
024import com.google.gwt.dom.client.Element;
025
026/**
027 * @author Alexandre Russel
028 */
029public class CSSClassManager {
030    private Element element;
031
032    public CSSClassManager(Element element) {
033        this.element = element;
034    }
035
036    /**
037     * remove the class from the specified element.
038     *
039     * @return true if the class was removed, false if the class was not found.
040     */
041    public boolean removeClass(String name) {
042        String className = element.getClassName();
043        if (isClassPresent(name)) {
044            element.setClassName(className.replaceAll("\\b" + name + "\\b\\s*", ""));
045            return true;
046        }
047        return false;
048    }
049
050    public boolean isClassPresent(String name) {
051        String cssClass = element.getClassName();
052        if (cssClass == null) {
053            return false;
054        }
055        return cssClass.matches(".*\\b" + name + "\\b.*");
056    }
057
058    /**
059     * Add the class to the element.
060     *
061     * @return true if the class was add, false if the class was already present.
062     */
063    public boolean addClass(String name) {
064        String className = element.getClassName();
065        if (!isClassPresent(name)) {
066            element.setClassName(className + " " + name);
067            return true;
068        }
069        return false;
070    }
071}