/*
 * SimplyHTML, a word processor based on Java, HTML and CSS
 * Copyright (C) 2002 Ulrich Hilger
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

package com.lightdev.app.shtm;

import java.awt.*;
import javax.swing.*;
import javax.swing.text.AttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.border.TitledBorder;
import javax.swing.border.EtchedBorder;
import javax.swing.text.html.CSS;
import javax.swing.text.SimpleAttributeSet;

/**
 * a panel to display and change line attributes
 *
 * @author Ulrich Hilger
 * @author Light Development
 * @author <a href="http://www.lightdev.com">http://www.lightdev.com</a>
 * @author <a href="mailto:info@lightdev.com">info@lightdev.com</a>
 * @author published under the terms and conditions of the
 *      GNU General Public License,
 *      for details see file gpl.txt in the distribution
 *      package of this software
 *
 * 
 */
class EffectPanel extends JPanel implements AttributeComponent {

  /** a radio button for the underline attribute */
  JRadioButton uLine;

  /** a radio button for the strike through attribute */
  JRadioButton strike;

  /** a radio button if no line effect is set */
  JRadioButton noLine;

  private Object originalValue;

  private int setValCount = 0;

  String selection = Util.CSS_ATTRIBUTE_NONE;

  public EffectPanel() {
    super(new GridLayout(3,1,3,3));

    /** initialize the line effects button group */
    noLine = new JRadioButton(Util.getResourceString("noLineLabel"));
    uLine = new JRadioButton(Util.getResourceString("uLineLabel"));
    strike = new JRadioButton(Util.getResourceString("strikeLabel"));
    ButtonGroup effectGroup = new ButtonGroup();
    effectGroup.add(noLine);
    effectGroup.add(uLine);
    effectGroup.add(strike);

    //JPanel linePanel = new JPanel(new GridLayout(3,1,3,3));
    setBorder(new TitledBorder(new EtchedBorder(
            EtchedBorder.LOWERED), Util.getResourceString("effectLabel")));
    Font font = UIManager.getFont("TextField.font");
    uLine.setFont(font);
    strike.setFont(font);
    noLine.setFont(font);
    add(noLine);
    add(uLine);
    add(strike);
  }

  public AttributeSet getValue(boolean includeUnchanged) {
    if(includeUnchanged) {
      return getAttributes();
    }
    else {
      return getValue();
    }
  }

  private AttributeSet getAttributes() {
    SimpleAttributeSet set = new SimpleAttributeSet();
    selection = Util.CSS_ATTRIBUTE_NONE;
    if(uLine.isSelected()) {
      selection = Util.CSS_ATTRIBUTE_UNDERLINE;
      StyleConstants.setUnderline(set, true);
    }
    else if(strike.isSelected()) {
      selection = Util.CSS_ATTRIBUTE_LINE_THROUGH;
      StyleConstants.setStrikeThrough(set, true);
    }
    Util.styleSheet().addCSSAttribute(set, CSS.Attribute.TEXT_DECORATION, selection);
    return set;
  }
  
  public AttributeSet getValue() {
      final AttributeSet set = getAttributes();
      if(((originalValue == null) && (!selection.equalsIgnoreCase(Util.CSS_ATTRIBUTE_NONE))) ||
              ((originalValue != null) && (!originalValue.toString().equalsIgnoreCase(selection))))
      {
          return set;
      }
      else {
          return new SimpleAttributeSet();
      }
  }

  public boolean setValue(AttributeSet a) {
    boolean success = false;
    if(a.isDefined(CSS.Attribute.TEXT_DECORATION)) {
      String value = a.getAttribute(CSS.Attribute.TEXT_DECORATION).toString();
      if(value.equalsIgnoreCase(Util.CSS_ATTRIBUTE_UNDERLINE)) {
        uLine.setSelected(true);
        if(++setValCount < 2) {
          originalValue = Util.CSS_ATTRIBUTE_UNDERLINE;
        }
	success = true;
      }
      else if(value.equalsIgnoreCase(Util.CSS_ATTRIBUTE_LINE_THROUGH)) {
        strike.setSelected(true);
        if(++setValCount < 2) {
          originalValue = Util.CSS_ATTRIBUTE_LINE_THROUGH;
        }
	success = true;
      }
      else {
        noLine.setSelected(true);
      }
    }
    else {
      noLine.setSelected(true);
    }
    return success;
  }
}