/*
    * 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;
  
  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.component.UIComponent;
  import javax.faces.component.ValueHolder;
  import javax.faces.component.behavior.ClientBehavior;
  import javax.faces.component.behavior.ClientBehaviorHolder;
  import javax.faces.component.html.HtmlOutputLabel;
  import javax.faces.context.FacesContext;
  import javax.faces.context.ResponseWriter;
  
  import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFRenderer;
  import org.apache.myfaces.shared.component.EscapeCapable;
  import org.apache.myfaces.shared.renderkit.JSFAttr;
  import org.apache.myfaces.shared.renderkit.RendererUtils;
  import org.apache.myfaces.shared.renderkit.html.CommonEventUtils;
  import org.apache.myfaces.shared.renderkit.html.CommonPropertyUtils;
  import org.apache.myfaces.shared.renderkit.html.HTML;
  import org.apache.myfaces.shared.renderkit.html.HtmlRenderer;
  import org.apache.myfaces.shared.renderkit.html.HtmlRendererUtils;
  import org.apache.myfaces.shared.renderkit.html.util.ResourceUtils;
  
  /**
   * 
   * @author Thomas Spiegl (latest modification by $Author$)
   * @author Anton Koinov
   * @author Martin Marinschek
   * @version $Revision$ $Date$
   */
  @JSFRenderer(renderKitId = "HTML_BASIC", family = "javax.faces.Output", type = "javax.faces.Label")
  public class HtmlLabelRenderer extends HtmlRenderer
  {
      //private static final Log log = LogFactory.getLog(HtmlLabelRenderer.class);
      private static final Logger log = Logger.getLogger(HtmlLabelRenderer.class.getName());
  
      @Override
      protected boolean isCommonPropertiesOptimizationEnabled(FacesContext facesContext)
      {
          return true;
      }
  
      @Override
      protected boolean isCommonEventsOptimizationEnabled(FacesContext facesContext)
      {
          return true;
      }
  
      @Override
      public void decode(FacesContext context, UIComponent component)
      {
          // Check for npe
          super.decode(context, component);
          
          HtmlRendererUtils.decodeClientBehaviors(context, component);
      }
  
      @Override
      public void encodeBegin(FacesContext facesContext, UIComponent uiComponent) throws IOException
      {
          super.encodeBegin(facesContext, uiComponent); // check for NP
  
          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);
              }
          }
          
          encodeBefore(facesContext, writer, uiComponent);
  
          writer.startElement(HTML.LABEL_ELEM, uiComponent);
         if (uiComponent instanceof ClientBehaviorHolder)
         {
             if (!behaviors.isEmpty())
             {
                 HtmlRendererUtils.writeIdAndName(writer, uiComponent, facesContext);
             }
             else
             {
                 HtmlRendererUtils.writeIdIfNecessary(writer, uiComponent, facesContext);
             }
             long commonPropertiesMarked = 0L;
             if (isCommonPropertiesOptimizationEnabled(facesContext))
             {
                 commonPropertiesMarked = CommonPropertyUtils.getCommonPropertiesMarked(uiComponent);
             }
             if (behaviors.isEmpty() && isCommonPropertiesOptimizationEnabled(facesContext))
             {
                 CommonPropertyUtils.renderEventProperties(writer, 
                         commonPropertiesMarked, uiComponent);
                 CommonPropertyUtils.renderFocusBlurEventProperties(writer,
                         commonPropertiesMarked, uiComponent);
             }
             else
             {
                 if (isCommonEventsOptimizationEnabled(facesContext))
                 {
                     Long commonEventsMarked = CommonEventUtils.getCommonEventsMarked(uiComponent);
                     CommonEventUtils.renderBehaviorizedEventHandlers(facesContext, writer, 
                             commonPropertiesMarked, commonEventsMarked, uiComponent, behaviors);
                     CommonEventUtils.renderBehaviorizedFieldEventHandlersWithoutOnchangeAndOnselect(
                         facesContext, writer, commonPropertiesMarked, commonEventsMarked, uiComponent, behaviors);
                 }
                 else
                 {
                     HtmlRendererUtils.renderBehaviorizedEventHandlers(facesContext, writer, uiComponent, behaviors);
                     HtmlRendererUtils.renderBehaviorizedFieldEventHandlersWithoutOnchangeAndOnselect(
                             facesContext, writer,
                             uiComponent, behaviors);
                 }
             }
             if (isCommonPropertiesOptimizationEnabled(facesContext))
             {
                 CommonPropertyUtils.renderLabelPassthroughPropertiesWithoutEvents(writer, 
                         commonPropertiesMarked, uiComponent);
             }
             else
             {
                 HtmlRendererUtils.renderHTMLAttributes(writer, uiComponent,
                                                        HTML.LABEL_PASSTHROUGH_ATTRIBUTES_WITHOUT_EVENTS);
             }
         }
         else
         {
             HtmlRendererUtils.writeIdIfNecessary(writer, uiComponent, facesContext);
             if (isCommonPropertiesOptimizationEnabled(facesContext))
             {
                 CommonPropertyUtils.renderLabelPassthroughProperties(writer, 
                         CommonPropertyUtils.getCommonPropertiesMarked(uiComponent), uiComponent);
             }
             else
             {
                 HtmlRendererUtils.renderHTMLAttributes(writer, uiComponent, HTML.LABEL_PASSTHROUGH_ATTRIBUTES);
             }
         }
 
         String forAttr = getFor(uiComponent);
 
         if (forAttr != null)
         {
             writer.writeAttribute(HTML.FOR_ATTR, getClientId(facesContext, uiComponent, forAttr), JSFAttr.FOR_ATTR);
         }
         else
         {
             if (log.isLoggable(Level.WARNING))
             {
                 log.warning("Attribute 'for' of label component with id " + uiComponent.getClientId(facesContext)
                         + " is not defined");
             }
         }
 
         // MyFaces extension: Render a label text given by value
         // TODO: Move to extended component
         if (uiComponent instanceof ValueHolder)
         {
             String text = RendererUtils.getStringValue(facesContext, uiComponent);
             if (text != null)
             {
                 boolean escape;
                 if (uiComponent instanceof HtmlOutputLabel || uiComponent instanceof EscapeCapable)
                 {
                     escape = ((HtmlOutputLabel)uiComponent).isEscape();
                 }
                 else
                 {
                     escape = RendererUtils.getBooleanAttribute(uiComponent,
                                                                org.apache.myfaces.shared.renderkit.JSFAttr.ESCAPE_ATTR,
                                                                true); //default is to escape
                 }                
                 if (escape)
                 {
                     writer.writeText(text, org.apache.myfaces.shared.renderkit.JSFAttr.VALUE_ATTR);
                 }
                 else
                 {
                     writer.write(text);
                 }
             }
         }
 
         writer.flush(); // close start tag
 
         encodeAfterStart(facesContext, writer, uiComponent);
     }
 
     /**
      * @throws IOException  
      */
     protected void encodeAfterStart(FacesContext facesContext, ResponseWriter writer, UIComponent uiComponent)
         throws IOException
     {
     }
 
     /**
      * @throws IOException  
      */
     protected void encodeBefore(FacesContext facesContext, ResponseWriter writer, UIComponent uiComponent)
         throws IOException
     {
     }
 
     protected String getFor(UIComponent component)
     {
         if (component instanceof HtmlOutputLabel)
         {
             return ((HtmlOutputLabel)component).getFor();
         }
 
         return (String)component.getAttributes().get(JSFAttr.FOR_ATTR);
 
     }
 
     protected String getClientId(FacesContext facesContext, UIComponent uiComponent, String forAttr)
     {
         return RendererUtils.getClientId(facesContext, uiComponent, forAttr);
     }
 
     @Override
     public void encodeEnd(FacesContext facesContext, UIComponent uiComponent) throws IOException
     {
         super.encodeEnd(facesContext, uiComponent); // check for NP
 
         ResponseWriter writer = facesContext.getResponseWriter();
 
         encodeBeforeEnd(facesContext, writer, uiComponent);
 
         writer.endElement(HTML.LABEL_ELEM);
 
         encodeAfter(facesContext, writer, uiComponent);
     }
 
     /**
      * @throws IOException  
      */
     protected void encodeBeforeEnd(FacesContext facesContext, ResponseWriter writer, UIComponent uiComponent)
         throws IOException
     {
     }
 
     /**
      * @throws IOException  
      */
     protected void encodeAfter(FacesContext facesContext, ResponseWriter writer, UIComponent uiComponent)
         throws IOException
     {
     }
 }