/*
 *  JFLAP - Formal Languages and Automata Package
 * 
 * 
 *  Susan H. Rodger
 *  Computer Science Department
 *  Duke University
 *  August 27, 2009

 *  Copyright (c) 2002-2009
 *  All rights reserved.

 *  JFLAP is open source software. Please see the LICENSE for terms.
 *
 */





package gui.grammar.parse;

import grammar.Grammar;
import gui.LeftTable;
import gui.environment.Universe;

import java.awt.Color;
import java.awt.Component;
import javax.swing.*;
import javax.swing.table.*;

/**
 * This table is an table specifically for the <CODE>FirstFollowModel</CODE>
 * for handling user entry of first and follow sets.
 * 
 * @author Thomas Finley
 */

public class FirstFollowTable extends LeftTable {
	/**
	 * Instantiates a new first follow table for a grammar.
	 * 
	 * @param grammar
	 *            the grammar to create the table
	 */
	public FirstFollowTable(Grammar grammar) {
		super(new FirstFollowModel(grammar));
		model = (FirstFollowModel) getModel();

		getColumnModel().getColumn(1).setCellRenderer(RENDERER);
		getColumnModel().getColumn(2).setCellRenderer(RENDERER);

		setCellSelectionEnabled(true);
	}

	/**
	 * Returns the first follow table model.
	 * 
	 * @return the table model
	 */
	public FirstFollowModel getFFModel() {
		return model;
	}

	/** The table model. */
	private FirstFollowModel model;

	/**
	 * Converts a string to a set string.
	 */
	private static String getSetString(String s) {
		if (s == null)
			return "{ }";
		StringBuffer sb = new StringBuffer("{ ");
		for (int i = 0; i < s.length(); i++) {
			char c = s.charAt(i);
			if (c == '!')
				c = Universe.curProfile.getEmptyString().charAt(0);
			sb.append(c);
			if (i != s.length() - 1)
				sb.append(',');
			sb.append(' ');
		}
		sb.append('}');
		return sb.toString();
	}

	/**
	 * The modified table cell renderer.
	 */
	private static class SetsCellRenderer extends DefaultTableCellRenderer {
		public Component getTableCellRendererComponent(JTable table,
				Object value, boolean isSelected, boolean hasFocus, int row,
				int column) {
			JLabel l = (JLabel) super.getTableCellRendererComponent(table,
					value, isSelected, hasFocus, row, column);
			if (hasFocus && table.isCellEditable(row, column))
				return l;
			l.setText(getSetString((String) value));
			return l;
		}
	}

	/** Modified to use the set renderer highlighter. */
	public void highlight(int row, int column) {
		highlight(row, column, THRG);
	}

	/** The built in highlight renderer generator. */
	private static final gui.HighlightTable.TableHighlighterRendererGenerator THRG = new TableHighlighterRendererGenerator() {
		public TableCellRenderer getRenderer(int row, int column) {
			if (renderer == null) {
				renderer = new SetsCellRenderer();
				renderer.setBackground(new Color(255, 150, 150));
			}
			return renderer;
		}

		private DefaultTableCellRenderer renderer = null;
	};

	/** The sets cell renderer. */
	private static final TableCellRenderer RENDERER = new SetsCellRenderer();
}