/*
    * 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.shared.renderkit.html;
  
  import java.io.IOException;
  import java.util.List;
  import java.util.Map;
  import java.util.logging.Level;
  import java.util.logging.Logger;
  
  import javax.faces.application.ProjectStage;
  import javax.faces.component.UIComponent;
  import javax.faces.component.UIGraphic;
  import javax.faces.component.behavior.ClientBehavior;
  import javax.faces.component.behavior.ClientBehaviorHolder;
  import javax.faces.context.FacesContext;
  import javax.faces.context.ResponseWriter;
  
  import org.apache.myfaces.shared.renderkit.JSFAttr;
  import org.apache.myfaces.shared.renderkit.RendererUtils;
  import org.apache.myfaces.shared.renderkit.html.util.JavascriptUtils;
  import org.apache.myfaces.shared.renderkit.html.util.ResourceUtils;
  
  
  /**
   * @author Manfred Geiler (latest modification by $Author: lu4242 $)
   * @author Thomas Spiegl
   * @author Anton Koinov
   * @version $Revision: 1349290 $ $Date: 2012-06-12 07:20:06 -0500 (Tue, 12 Jun 2012) $
   */
  public class HtmlImageRendererBase
          extends HtmlRenderer
  {
      //private static final Log log = LogFactory.getLog(HtmlImageRendererBase.class);
      private static final Logger log = Logger.getLogger(HtmlImageRendererBase.class.getName());
      
      public void decode(FacesContext context, UIComponent component)
      {
          //check for npe
          super.decode(context, component);
          
          HtmlRendererUtils.decodeClientBehaviors(context, component);
      }
  
      public void encodeEnd(FacesContext facesContext, UIComponent uiComponent)
              throws IOException
      {
          org.apache.myfaces.shared.renderkit.RendererUtils.checkParamValidity(
                  facesContext, uiComponent, UIGraphic.class);
  
          ResponseWriter writer = facesContext.getResponseWriter();
          
          Map<String, List<ClientBehavior>> behaviors = null;
          if (uiComponent instanceof ClientBehaviorHolder)
          {
              behaviors = ((ClientBehaviorHolder) uiComponent).getClientBehaviors();
              if (!behaviors.isEmpty())
              {
                  ResourceUtils.renderDefaultJsfJsInlineIfNecessary(facesContext, writer);
              }
          }
          
          writer.startElement(HTML.IMG_ELEM, uiComponent);
  
          if (uiComponent instanceof ClientBehaviorHolder 
                  && JavascriptUtils.isJavascriptAllowed(facesContext.getExternalContext())
                  && !behaviors.isEmpty())
          {
              HtmlRendererUtils.writeIdAndName(writer, uiComponent, facesContext);
          }
          else
          {
              HtmlRendererUtils.writeIdIfNecessary(writer, uiComponent, facesContext);
          }
  
          final String url = RendererUtils.getIconSrc(facesContext, uiComponent, JSFAttr.URL_ATTR);
          if (url != null)
          {
              writer.writeURIAttribute(HTML.SRC_ATTR, url,JSFAttr.VALUE_ATTR);
          }
          else
          {
            if (facesContext.isProjectStage(ProjectStage.Development) && log.isLoggable(Level.WARNING))
           {
               log.warning("Component UIGraphic " + uiComponent.getClientId(facesContext) 
                       + " has no attribute url, value, name or attribute resolves to null. Path to component " 
                       + RendererUtils.getPathToComponent(uiComponent));
           }
         }
 
         /* 
          * Warn the user if the ALT attribute is missing.
          */                
         if (uiComponent.getAttributes().get(HTML.ALT_ATTR) == null) 
         {
             if(facesContext.isProjectStage(ProjectStage.Development) && log.isLoggable(Level.WARNING))
             {
                 log.warning("Component UIGraphic " + uiComponent.getClientId(facesContext) 
                         + " has no attribute alt or attribute resolves to null. Path to component " 
                         + RendererUtils.getPathToComponent(uiComponent));
             }
         }
 
         if (uiComponent instanceof ClientBehaviorHolder && JavascriptUtils.isJavascriptAllowed(
                 facesContext.getExternalContext()))
         {
             if (behaviors.isEmpty() && isCommonPropertiesOptimizationEnabled(facesContext))
             {
                 CommonPropertyUtils.renderEventProperties(writer, 
                         CommonPropertyUtils.getCommonPropertiesMarked(uiComponent), uiComponent);
             }
             else
             {
                 if (isCommonEventsOptimizationEnabled(facesContext))
                 {
                     CommonEventUtils.renderBehaviorizedEventHandlers(facesContext, writer, 
                            CommonPropertyUtils.getCommonPropertiesMarked(uiComponent),
                            CommonEventUtils.getCommonEventsMarked(uiComponent), uiComponent, behaviors);
                 }
                 else
                 {
                     HtmlRendererUtils.renderBehaviorizedEventHandlers(facesContext, writer, uiComponent, behaviors);
                 }
             }
             if (isCommonPropertiesOptimizationEnabled(facesContext))
             {
                 HtmlRendererUtils.renderHTMLAttributes(writer, uiComponent, HTML.IMG_ATTRIBUTES);
                 CommonPropertyUtils.renderCommonPassthroughPropertiesWithoutEvents(writer, 
                         CommonPropertyUtils.getCommonPropertiesMarked(uiComponent), uiComponent);
             }
             else
             {
                 HtmlRendererUtils.renderHTMLAttributes(writer, uiComponent, 
                         HTML.IMG_PASSTHROUGH_ATTRIBUTES_WITHOUT_EVENTS);
             }
         }
         else
         {
             if (isCommonPropertiesOptimizationEnabled(facesContext))
             {
                 HtmlRendererUtils.renderHTMLAttributes(writer, uiComponent, HTML.IMG_ATTRIBUTES);
                 CommonPropertyUtils.renderCommonPassthroughProperties(writer, 
                         CommonPropertyUtils.getCommonPropertiesMarked(uiComponent), uiComponent);
             }
             else
             {
                 HtmlRendererUtils.renderHTMLAttributes(writer, uiComponent, 
                         HTML.IMG_PASSTHROUGH_ATTRIBUTES);
             }
         }
 
         writer.endElement(org.apache.myfaces.shared.renderkit.html.HTML.IMG_ELEM);
 
     }
 
 }