org.primefaces.component.headerrow.HeaderRowRenderer Maven / Gradle / Ivy

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/*
 * Copyright 2009-2017 PrimeTek.
 *
 * 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.primefaces.component.headerrow;

import java.io.IOException;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.primefaces.component.column.Column;
import org.primefaces.component.datatable.DataTable;
import org.primefaces.renderkit.CoreRenderer;
import org.primefaces.util.MessageFactory;

public class HeaderRowRenderer extends CoreRenderer {
    @Override
    public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
        HeaderRow row = (HeaderRow) component;
        DataTable table = (DataTable) row.getParent();
        ResponseWriter writer = context.getResponseWriter();
        boolean isExpandableRowGroups = table.isExpandableRowGroups();
        
        writer.startElement("tr", null);
        writer.writeAttribute("class", DataTable.HEADER_ROW_CLASS, null);

        boolean isFirstColumn = true;
        for(UIComponent kid : row.getChildren()) {
            if(kid.isRendered() && kid instanceof Column) {
                Column column = (Column) kid;
                String style = column.getStyle();
                String styleClass = column.getStyleClass();
        
                writer.startElement("td", null);
                if(style != null) writer.writeAttribute("style", style, null);
                if(styleClass != null) writer.writeAttribute("class", styleClass, null);
                if(column.getRowspan() != 1) writer.writeAttribute("rowspan", column.getRowspan(), null);
                if(column.getColspan() != 1) writer.writeAttribute("colspan", column.getColspan(), null);

                if(isExpandableRowGroups && isFirstColumn) {
                    String ariaLabel = MessageFactory.getMessage(DataTable.ROW_GROUP_TOGGLER, null);
                    
                    writer.startElement("a", null);
                    writer.writeAttribute("class", DataTable.ROW_GROUP_TOGGLER_CLASS, null);
                    writer.writeAttribute("aria-expanded", String.valueOf(true), null);
                    writer.writeAttribute("aria-label", ariaLabel, null);
                    writer.writeAttribute("href", "#", null);
                        writer.startElement("span", null);
                        writer.writeAttribute("class", DataTable.ROW_GROUP_TOGGLER_ICON_CLASS, null);
                        writer.endElement("span");
                    writer.endElement("a");
                    
                    isFirstColumn = false;
                }
                
                column.encodeAll(context);

                writer.endElement("td");
            }
        }

        writer.endElement("tr");
    }
    
    @Override
    public void encodeChildren(FacesContext context, UIComponent component) throws IOException {
        //Rendering happens on encodeEnd
    }

    @Override
    public boolean getRendersChildren() {
        return true;
    }
}