/*
 * 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.user.client.*;

import java.util.*;

/**
 * Helper class to bulk load {@link FixedWidthGrid} tables.
 *
 * @param <RowType> the data type of the row values
 */
public class FixedWidthGridBulkRenderer<RowType> extends SelectionGridBulkRenderer<RowType> {
    /**
     * Constructor. Takes in the number of columns in the table to allow efficient
     * creation of the header row.
     *
     * @param grid     {@link FixedWidthGrid} to be be bulk rendered
     * @param tableDef the table definition that should be used during rendering
     */
    public FixedWidthGridBulkRenderer( FixedWidthGrid grid, TableDefinition<RowType> tableDef ) {
        super( grid, tableDef );
    }

    /**
     * Constructor. Takes in the number of columns in the table to allow efficient
     * creation of the header row.
     *
     * @param grid           {@link FixedWidthGrid} to be be bulk rendered
     * @param sourceTableDef the external source of the table definition
     */
    public FixedWidthGridBulkRenderer( FixedWidthGrid grid, HasTableDefinition<RowType> sourceTableDef ) {
        super( grid, sourceTableDef );
    }

    /**
     * Gets the new ghost element from the table.
     *
     * @param table the table
     *
     * @return the new ghost row
     */
    protected native Element getBulkLoadedGhostRow( HTMLTable table )
    /*-{
        return table.@com.google.gwt.gen2.table.client.HTMLTable::getBodyElement()( table ).rows[0];
    }-*/;

    @Override
    protected void renderRows( Iterator<RowType> iterator, final RenderingOptions options ) {
        FixedWidthGrid table = (FixedWidthGrid) super.getTable();
        options.headerRow = DOM.toString( table.getGhostRow() );
        super.renderRows( iterator, options );
    }

    @Override
    protected void renderRows( String rawHTMLTable ) {
        super.renderRows( rawHTMLTable );

        // Update the ghost row variable after the num columns has been set
        Element newGhostRow = getBulkLoadedGhostRow( getTable() );
        FixedWidthGrid grid = (FixedWidthGrid) getTable();
        grid.setGhostRow( newGhostRow );
        grid.updateGhostRow();
    }
}