/*

  * 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.util.Map;

 import javax.faces.component.UICommand;

 import javax.faces.component.UIComponent;

 import javax.faces.component.html.HtmlCommandButton;

 import javax.faces.context.FacesContext;

 import javax.faces.context.ResponseWriter;

 import javax.faces.event.ActionEvent;

 import javax.faces.internal.IgnoreAttribute;

 import org.seasar.framework.util.StringUtil;

 import org.seasar.teeda.core.JsfConstants;

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

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

 /**

  * @author manhole

  */

 public class HtmlCommandButtonRenderer extends AbstractRenderer {

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

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

     private final IgnoreAttribute ignoreComponent = new IgnoreAttribute();

     {

         addIgnoreAttributeName(JsfConstants.ID_ATTR);

         addIgnoreAttributeName(JsfConstants.NAME_ATTR);

         addIgnoreAttributeName(JsfConstants.TYPE_ATTR);

         addIgnoreAttributeName(JsfConstants.VALUE_ATTR);

         addIgnoreAttributeName(JsfConstants.IMAGE_ATTR);

         addIgnoreAttributeName(JsfConstants.ACTION_ATTR);

         addIgnoreAttributeName(JsfConstants.IMMEDIATE_ATTR);

     }

     public void encodeEnd(FacesContext context, UIComponent component)

             throws IOException {

         assertNotNull(context, component);

         if (!component.isRendered()) {

             return;

         }

         encodeHtmlCommandButtonEnd(context, (HtmlCommandButton) component);

     }

     protected void encodeHtmlCommandButtonEnd(FacesContext context,

             HtmlCommandButton htmlCommandButton) throws IOException {

         ResponseWriter writer = context.getResponseWriter();

         writer.startElement(JsfConstants.INPUT_ELEM, htmlCommandButton);

         final String image = getImage(context, htmlCommandButton);

         final boolean isImageType = StringUtil.isNotBlank(image);

         String type;

         if (isImageType) {

             type = JsfConstants.IMAGE_VALUE;

         } else {

             type = htmlCommandButton.getType();

         }

         RendererUtil.renderAttribute(writer, JsfConstants.TYPE_ATTR, type);

         final String id = getIdForRender(context, htmlCommandButton);

         RendererUtil

                 .renderIdAttributeIfNecessary(writer, htmlCommandButton, id);

         RendererUtil.renderAttribute(writer, JsfConstants.NAME_ATTR,

                 htmlCommandButton.getClientId(context));

         if (isImageType) {

             RendererUtil.renderAttribute(writer, JsfConstants.SRC_ATTR, image,

                     JsfConstants.IMAGE_ATTR);

         } else {

             renderValueAttribute(context, htmlCommandButton, writer);

         }

         renderRemainAttributes(htmlCommandButton, writer, ignoreComponent);

         writer.endElement(JsfConstants.INPUT_ELEM);

     }

     protected String getImage(FacesContext context,

             HtmlCommandButton htmlCommandButton) {

         return htmlCommandButton.getImage();

     }

     protected void renderValueAttribute(FacesContext context,

             UICommand command, ResponseWriter writer) throws IOException {

         RendererUtil.renderAttribute(writer, JsfConstants.VALUE_ATTR, command

                 .getValue());

     }

     public void decode(FacesContext context, UIComponent component) {

         assertNotNull(context, component);

         decodeHtmlCommandButton(context, (HtmlCommandButton) component);

     }

     protected void decodeHtmlCommandButton(FacesContext context,

             HtmlCommandButton htmlCommandButton) {

         Map paramMap = context.getExternalContext().getRequestParameterMap();

         String clientId = htmlCommandButton.getClientId(context);

         if (paramMap.containsKey(clientId) ||

                 paramMap.containsKey(clientId + ".x") ||

                 paramMap.containsKey(clientId + ".y")) {

             if (JsfConstants.RESET_VALUE.equalsIgnoreCase(htmlCommandButton

                     .getType())) {

             } else {

                 enqueueEvent(htmlCommandButton);

             }

         }

     }

     protected void enqueueEvent(final HtmlCommandButton htmlCommandButton) {

         htmlCommandButton.queueEvent(new ActionEvent(htmlCommandButton));

     }

     protected void addIgnoreAttributeName(final String attr) {

         ignoreComponent.addAttributeName(attr);

     }

 }