org.wicketstuff.calendarviews.AddCssClassBehavior.java Source code

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Here is the source code for org.wicketstuff.calendarviews.AddCssClassBehavior.java

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/**
 * Copyright (C) 2008 Jeremy Thomerson <jeremy@thomersonfamily.com>
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.wicketstuff.calendarviews;

import java.util.ArrayList;
import java.util.List;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.model.IModel;
import org.wicketstuff.calendarviews.model.ICategorizedEvent;
import org.wicketstuff.calendarviews.model.IEvent;
import org.wicketstuff.calendarviews.util.StringUtil;

/**
 * A behavior for adding a class attribute of <tt>ICategorizedEvent</tt> events to a component, even
 * if there is already a class on the tag. If there is, this behavior will add a space between the
 * two classes.
 * 
 * @author Jeremy Thomerson
 */
public class AddCssClassBehavior extends Behavior {
    private static final String ATTRIBUTE_NAME = "class";

    private static final long serialVersionUID = 1L;

    private final IModel<IEvent> mEventModel;

    public AddCssClassBehavior(IModel<IEvent> event) {
        mEventModel = event;
    }

    @Override
    public void onComponentTag(Component component, ComponentTag tag) {
        super.onComponentTag(component, tag);
        List<String> classes = new ArrayList<String>();
        String existing = tag.getAttributes().getString(ATTRIBUTE_NAME);
        if (StringUtil.isEmpty(existing) == false) {
            classes.add(existing);
        }

        IEvent event = mEventModel.getObject();
        classes.add(event.isAllDayEvent() ? "allday" : "partday");

        if (event instanceof ICategorizedEvent) {
            String css = ((ICategorizedEvent) event).getCssClassForCategory();
            classes.add(css);
        }
        tag.put(ATTRIBUTE_NAME, StringUtil.join(classes.toArray(new String[classes.size()]), " "));
    }
}