content: /*
   *  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.apache.causeway.viewer.wicket.ui.panels;
  
  import org.apache.wicket.Component;
  import org.apache.wicket.ajax.attributes.AjaxCallListener;
  import org.apache.wicket.ajax.attributes.AjaxRequestAttributes;
  import org.apache.wicket.markup.head.CssHeaderItem;
  import org.apache.wicket.markup.head.CssReferenceHeaderItem;
  import org.apache.wicket.markup.head.IHeaderResponse;
  import org.apache.wicket.request.resource.CssResourceReference;
  
  import org.apache.causeway.commons.internal.base._Strings;
  
  public final class PanelUtil {
  
      private PanelUtil(){}
  
      /**
       * The contribution to the header performed implicitly by {@link PanelAbstract}.
       */
      public static void renderHead(final IHeaderResponse response, final Class<?> cls) {
          final CssResourceReference cssResourceReference = cssResourceReferenceFor(cls);
          if(cssResourceReference == null) {
              return;
          }
          final CssReferenceHeaderItem forReference = CssHeaderItem.forReference(cssResourceReference);
          response.render(forReference);
      }
  
      public static CssResourceReference cssResourceReferenceFor(final Class<?> cls) {
          return cssResourceReferenceFor(cls, null);
      }
  
      public static CssResourceReference cssResourceReferenceFor(final Class<?> cls, final String suffix) {
          final String url = cssFor(cls, suffix);
          if(url == null) {
              return null;
          }
          return new CssResourceReference(cls, url);
      }
  
      private static String cssFor(final Class<?> cls, String suffix) {
          if(cls == null) {
              return null;
          }
          String simpleName = cls.getSimpleName();
          if(_Strings.isNullOrEmpty(simpleName)) {
              return null; // eg inner classes
          }
          String string;
          if (suffix != null) {
              string = ("-" + suffix);
          } else {
              string = "";
          }
          return simpleName + string + ".css";
      }
  
      public static void disableBeforeReenableOnComplete(
              final AjaxRequestAttributes attributes, final Component ajaxButtonOrLink) {
          attributes.getAjaxCallListeners().add(new AjaxCallListener()
                  .onBefore("$('#" + ajaxButtonOrLink.getMarkupId() + "').prop('disabled',true);")
                  .onComplete("$('#" + ajaxButtonOrLink.getMarkupId() + "').prop('disabled',false);"));
      }
  
  }
  