/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * Licensed 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.seasar.teeda.core.render.html;

 import java.io.IOException;

 import java.text.MessageFormat;

 import java.util.ArrayList;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Locale;

 import javax.faces.component.UIComponent;

 import javax.faces.component.UIParameter;

 import javax.faces.component.html.HtmlOutputFormat;

 import javax.faces.context.FacesContext;

 import javax.faces.context.ResponseWriter;

 import javax.faces.internal.IgnoreAttribute;

 import org.seasar.teeda.core.JsfConstants;

 import org.seasar.teeda.core.render.AbstractRenderer;

 import org.seasar.teeda.core.util.RendererUtil;

 import org.seasar.teeda.core.util.ValueHolderUtil;

 /**

  * @author manhole

  */

 public class HtmlOutputFormatRenderer extends AbstractRenderer {

     public static final String COMPONENT_FAMILY = "javax.faces.Output";

     public static final String RENDERER_TYPE = "javax.faces.Format";

     private final IgnoreAttribute ignoreComponent = new IgnoreAttribute();

     {

         ignoreComponent.addAttributeName(JsfConstants.ID_ATTR);

         ignoreComponent.addAttributeName(JsfConstants.VALUE_ATTR);

         ignoreComponent.addAttributeName(JsfConstants.ESCAPE_ATTR);

     }

     public void encodeEnd(FacesContext context, UIComponent component)

             throws IOException {

         assertNotNull(context, component);

         if (!component.isRendered()) {

             return;

         }

         encodeHtmlOutputFormatEnd(context, (HtmlOutputFormat) component);

     }

     protected void encodeHtmlOutputFormatEnd(FacesContext context,

             HtmlOutputFormat htmlOutputFormat) throws IOException {

         ResponseWriter writer = context.getResponseWriter();

         boolean startSpan = false;

         if (containsAttributeForRender(htmlOutputFormat, ignoreComponent)) {

             writer.startElement(JsfConstants.SPAN_ELEM, htmlOutputFormat);

             startSpan = true;

             RendererUtil.renderIdAttributeIfNecessary(writer, htmlOutputFormat,

                     getIdForRender(context, htmlOutputFormat));

             renderRemainAttributes(htmlOutputFormat, writer, ignoreComponent);

         }

         String value = getFormattedValue(context, htmlOutputFormat);

         if (htmlOutputFormat.isEscape()) {

             writer.writeText(value, null);

         } else {

             writer.write(value);

         }

         if (startSpan) {

             writer.endElement(JsfConstants.SPAN_ELEM);

         }

     }

     protected String getFormattedValue(FacesContext context,

             HtmlOutputFormat htmlOutputFormat) {

         List args = new ArrayList();

         for (Iterator it = htmlOutputFormat.getChildren().iterator(); it

                 .hasNext();) {

             UIComponent child = (UIComponent) it.next();

             if (child instanceof UIParameter) {

                 UIParameter parameter = (UIParameter) child;

                 args.add(parameter.getValue());

             }

         }

         String pattern = ValueHolderUtil.getValueForRender(context,

                 htmlOutputFormat);

         MessageFormat format = new MessageFormat(pattern, getLocale(context));

         String value = format.format((Object[]) args.toArray(new Object[args

                 .size()]));

         return value;

     }

     protected Locale getLocale(FacesContext context) {

         Locale locale = context.getViewRoot().getLocale();

         if (locale == null) {

             locale = Locale.getDefault();

         }

         return locale;

     }

 }