/*
 * Copyright 2008 Google Inc.
 * 
 * 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 com.google.gwt.gen2.table.client;

import com.google.gwt.gen2.table.client.SelectionGrid.*;
import com.google.gwt.gen2.table.client.TableDefinition.*;

/**
 * Allows bulk rendering of {@link SelectionGrid}s.
 *
 * @param <RowType> the data type of the row values
 */
public class SelectionGridBulkRenderer<RowType> extends GridBulkRenderer<RowType> {
    /**
     * A customized {@link SelectionGridBulkRenderer.BulkCellView} used by the
     * {@link SelectionGridBulkRenderer}.
     *
     * @param <RowType> the data type of the row values
     */
    protected static class SelectionBulkCellView<RowType> extends BulkCellView<RowType> {
        private TableBulkRenderer<RowType> bulkRenderer = null;

        /**
         * Construct a new {@link SelectionGridBulkRenderer.SelectionBulkCellView}.
         *
         * @param bulkRenderer the renderer
         */
        public SelectionBulkCellView( TableBulkRenderer<RowType> bulkRenderer ) {
            super( bulkRenderer );
            this.bulkRenderer = bulkRenderer;
        }

        @Override
        protected void renderRowValue( RowType rowValue, ColumnDefinition columnDef ) {
            // Add the input column
            if ( getCellIndex() == 0 ) {
                SelectionPolicy selectionPolicy = ((SelectionGrid) bulkRenderer.getTable()).getSelectionPolicy();
                if ( selectionPolicy.hasInputColumn() ) {
                    getStringBuffer().append( "<td align='CENTER'>" );
                    getStringBuffer().append( ((SelectionGrid) bulkRenderer.getTable()).getInputHtml( selectionPolicy ) );
                    getStringBuffer().append( "</td>" );
                }
            }

            // Render the actual cell
            super.renderRowValue( rowValue, columnDef );
        }
    }

    /**
     * Construct a new {@link SelectionGridBulkRenderer}.
     *
     * @param grid     {@link SelectionGrid} to be be bulk rendered
     * @param tableDef the table definition that should be used during rendering
     */
    public SelectionGridBulkRenderer( SelectionGrid grid, TableDefinition<RowType> tableDef ) {
        super( grid, tableDef );
    }

    /**
     * Construct a new {@link SelectionGridBulkRenderer}.
     *
     * @param grid           {@link SelectionGrid} to be be bulk rendered
     * @param sourceTableDef the external source of the table definition
     */
    public SelectionGridBulkRenderer( SelectionGrid grid, HasTableDefinition<RowType> sourceTableDef ) {
        super( grid, sourceTableDef );
    }

    @Override
    protected AbstractRowView<RowType> createRowView( final RenderingOptions options ) {
        BulkCellView<RowType> cellView = new SelectionBulkCellView<RowType>( this );
        return new BulkRowView<RowType>( cellView, this, options );
    }
}