/*
    * 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.myfaces.renderkit.html.ext;
  
  import java.io.IOException;
  
  import javax.faces.component.UIComponent;
  import javax.faces.component.UIOutput;
  import javax.faces.context.FacesContext;
  import javax.faces.context.ResponseWriter;
  
  import org.apache.myfaces.component.UserRoleUtils;
  import org.apache.myfaces.component.html.ext.HtmlCommandLink;
  import org.apache.myfaces.renderkit.html.jsf.ExtendedHtmlLinkRenderer;
  import org.apache.myfaces.shared_tomahawk.renderkit.JSFAttr;
  import org.apache.myfaces.shared_tomahawk.renderkit.html.HTML;
  import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRendererUtils;
  
  /**
   * @JSFRenderer
   *   renderKitId = "HTML_BASIC"
   *   family = "javax.faces.Command"
   *   type = "org.apache.myfaces.Link" 
   * 
   * @author Manfred Geiler (latest modification by $Author: lu4242 $)
   * @version $Revision: 951635 $ $Date: 2010-06-04 21:19:57 -0500 (Fri, 04 Jun 2010) $
   */
  public class HtmlLinkRenderer
          extends ExtendedHtmlLinkRenderer
  {
      //private static final Log log = LogFactory.getLog(HtmlLinkRenderer.class);
  
      protected void renderCommandLinkStart(FacesContext facesContext,
                                            UIComponent component,
                                            String clientId,
                                            Object value,
                                            String style,
                                            String styleClass) throws IOException
      {
          //if link is disabled we render the nested components without the anchor
          if (UserRoleUtils.isEnabledOnUserRole(component) &&
                          !((HtmlCommandLink) component).isDisabled() )
          {
              super.renderCommandLinkStart(facesContext, component, clientId, value, style, styleClass);
          }
          else
          {
              //For a disabled HtmlCommandLink we want to
              //render a span-element instead of the Anchor
  
              //set disabledStyle if available
              if(((HtmlCommandLink) component).getDisabledStyle() != null)
              {
                  style = ((HtmlCommandLink) component).getDisabledStyle();
              }
  
              if(((HtmlCommandLink) component).getDisabledStyleClass() != null)
              {
                  styleClass = ((HtmlCommandLink) component).getDisabledStyleClass();
              }
  
              renderSpanStart(facesContext, component, clientId, value, style, styleClass);
              /*// render value as required by JSF 1.1 renderkitdocs
              if(value != null)
              {
                  ResponseWriter writer = facesContext.getResponseWriter();
  
                  writer.writeText(value.toString(), JSFAttr.VALUE_ATTR);
              }*/
          }
      }
  
      protected void renderOutputLinkStart(FacesContext facesContext, UIOutput output) throws IOException
      {
          //if link is disabled we render the nested components without the anchor
          if (UserRoleUtils.isEnabledOnUserRole(output))
          {
              super.renderOutputLinkStart(facesContext, output);
          }
      }
  
      protected void renderOutputLinkEnd(FacesContext facesContext,
              UIComponent component) throws IOException
     {
         if (UserRoleUtils.isEnabledOnUserRole(component))
         {
             super.renderOutputLinkEnd(facesContext, component);
         }
     }
 
     protected void renderCommandLinkEnd(FacesContext facesContext, UIComponent component) throws IOException
     {
         //if link is disabled we render the nested components without the anchor
         if (UserRoleUtils.isEnabledOnUserRole(component) &&
                         !((HtmlCommandLink) component).isDisabled() )
         {
             super.renderCommandLinkEnd(facesContext, component);
         }
         else
         {
             renderSpanEnd(facesContext, component);
         }
     }
 
     protected void renderSpanStart(FacesContext facesContext,
                                           UIComponent component,
                                           String clientId,
                                           Object value,
                                           String style,
                                           String styleClass) throws IOException
     {
     ResponseWriter writer = facesContext.getResponseWriter();
 
         String[] spanAttrsToRender;
 
         writer.startElement(HTML.SPAN_ELEM, component);
 
         spanAttrsToRender = HTML.COMMON_PASSTROUGH_ATTRIBUTES_WITHOUT_STYLE;
 
         HtmlRendererUtils.renderHTMLAttribute(writer, HTML.ID_ATTR, HTML.ID_ATTR, clientId);
 
         HtmlRendererUtils.renderHTMLAttributes(writer, component,
                                                spanAttrsToRender);
         HtmlRendererUtils.renderHTMLAttribute(writer, HTML.STYLE_ATTR, HTML.STYLE_ATTR,
                                               style);
         HtmlRendererUtils.renderHTMLAttribute(writer, HTML.STYLE_CLASS_ATTR, HTML.STYLE_CLASS_ATTR,
                                               styleClass);
 
         // render value as required by JSF 1.1 renderkitdocs
         if(value != null)
         {
             writer.writeText(value.toString(), JSFAttr.VALUE_ATTR);
         }
     }
 
     protected void renderSpanEnd(FacesContext facesContext, UIComponent component) throws IOException
     {
         ResponseWriter writer = facesContext.getResponseWriter();
         // force separate end tag
         writer.writeText("", null);
         writer.endElement(HTML.SPAN_ELEM);
     }
 }