/*
    * 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.tobago.renderkit.html.scarborough.standard.tag;
  
  import org.apache.myfaces.tobago.component.UIColumn;
  import org.apache.myfaces.tobago.component.UILink;
  import org.apache.myfaces.tobago.component.UIOut;
  import org.apache.myfaces.tobago.context.Markup;
  import org.apache.myfaces.tobago.renderkit.LayoutComponentRendererBase;
  import org.apache.myfaces.tobago.util.ComponentUtils;
  
  import javax.faces.component.UIComponent;
  import javax.faces.context.FacesContext;
  import java.io.IOException;
  
  public class ColumnRenderer extends LayoutComponentRendererBase {
  
    @Override
    public void prepareRender(FacesContext facesContext, UIComponent component) throws IOException {
      super.prepareRender(facesContext, component);
  
      final UIColumn column = (UIColumn) component;
      if (isPure(column)) {
        ComponentUtils.addCurrentMarkup(column, Markup.PURE);
      }
    }
  
    /**
     * Differ between simple content and complex content.
     * Decide if the content of a cell needs usually the whole possible space or
     * is the character of the content like flowing text.
     * In the second case, the style usually sets a padding.<br/>
     * Pure is needed for &lt;tc:panel>,  &lt;tc:in>, etc.<br/>
     * Pure is not needed for  &lt;tc:out> and &lt;tc:link>
     */
    private boolean isPure(UIColumn column) {
      for (UIComponent child : column.getChildren()) {
        if (!(child instanceof UIOut) && !(child instanceof UILink)) {
          return true;
        }
      }
      return false;
    }
  
    @Override
    public boolean getPrepareRendersChildren() {
      return true;
    }
  
    @Override
    public boolean getRendersChildren() {
      return true;
    }
  }