ErrorHighlightBehavior.java

/////////////////////////////////////////////////////////////////////////////
//
// Project ProjectForge Community Edition
//         www.projectforge.org
//
// Copyright (C) 2001-2014 Kai Reinhard (k.reinhard@micromata.de)
//
// ProjectForge is dual-licensed.
//
// This community edition is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as published
// by the Free Software Foundation; version 3 of the License.
//
// This community edition is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
// Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, see http://www.gnu.org/licenses/.
//
/////////////////////////////////////////////////////////////////////////////

package org.projectforge.web.wicket;

import org.apache.commons.lang.StringUtils;
import org.apache.wicket.Component;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.html.form.FormComponent;
import org.projectforge.web.wicket.flowlayout.FieldsetPanel;

/**
 * Set class attribute of tag to error or appends " error" if class attribute does already exist.
 * 
 * @author Kai Reinhard (k.reinhard@micromata.de)
 */
public class ErrorHighlightBehavior extends Behavior
{
  private static final long serialVersionUID = -7296498608817410487L;

  @Override
  public void onComponentTag(final Component component, final ComponentTag tag)
  {
    if (component instanceof FormComponent< ? >) {
      final FormComponent< ? > fc = (FormComponent< ? >) component;
      if (fc instanceof AbstractSelectPanel< ? > == true) {
        // Do ignore the AbstractSelectPanels, otherwise the icons looks not very pretty on colored background.
        return;
      }
      if (fc.isValid() == true) {
        return;
      }
    } else if (component.getParent() != null && component.getParent() instanceof FieldsetPanel) {
      final FieldsetPanel fs = (FieldsetPanel) component.getParent();
      if (fs.isValid() == true) {
        return;
      }
    } else {
      return;
    }
    final String value = tag.getAttribute("class");
    if (StringUtils.isEmpty(value) == true) {
      tag.put("class", "has-error");
    } else {
      tag.put("class", value + " has-error");
    }
  }
}