/*
 * 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 javax.swing.JPanel;
import javax.swing.border.TitledBorder;
import javax.swing.border.EtchedBorder;
import java.util.Vector;
import javax.swing.JLabel;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Color;
import javax.swing.text.AttributeSet;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.html.CSS;
import java.util.Enumeration;

/**
 * Panel to show and manipulate border settings for a rectangular
 * object such as a table cell
 *
 * @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 BorderPanel extends JPanel implements AttributeComponent {

    private Vector components = new Vector();

    /** the attributes for border width */
    private CombinedAttribute bWidth;

    /** the attributes for border color */
    private CombinedAttribute bColor;

    /** the color value to compare to for determining changes */
    private String oColor;

    /** the width value to compare to for determining changes */
    private String oWidth;

    /** indicates if a call to setValue is for initial setting or for changes */
    private int setValueCalls = 0;

    public BorderPanel() {
      super();

      // set layout
      GridBagLayout g = new GridBagLayout();
      setLayout(g);

      // constraints to use on our GridBagLayout
      GridBagConstraints c = new GridBagConstraints();

      addSettings(g,
                  c,
                  Util.getResourceString("topLabel"),
                  CombinedAttribute.ATTR_TOP,
                  0,
                  0);
      addSettings(g,
                  c,
                  Util.getResourceString("rightLabel"),
                  CombinedAttribute.ATTR_RIGHT,
                  1,
                  1);
      addSettings(g,
                  c,
                  Util.getResourceString("bottomLabel"),
                  CombinedAttribute.ATTR_BOTTOM,
                  1,
                  0);
      addSettings(g,
                  c,
                  Util.getResourceString("leftLabel"),
                  CombinedAttribute.ATTR_LEFT,
                  0,
                  1);
    }

    private void addSettings(GridBagLayout g, GridBagConstraints c,
                             String title, int side,
                             int x, int y)
    {
      BorderSettings bs = new BorderSettings(title, side);
      Util.addGridBagComponent(this, bs, g, c, x, y, GridBagConstraints.WEST);
      components.addElement(bs);
    }

    /**
     * set the value of this <code>AttributeComponent</code>
     *
     * @param a  the set of attributes possibly having an
     *          attribute this component can display
     *
     * @return true, if the set of attributes had a matching attribute,
     *            false if not
     */
    public boolean setValue(AttributeSet a) {
      boolean success = true;
      Enumeration e = components.elements();
      bWidth = new CombinedAttribute(CSS.Attribute.BORDER_WIDTH, a, true);
      bColor = new CombinedAttribute(CSS.Attribute.BORDER_COLOR, a, true);
      if(++setValueCalls < 2) {
        oColor = bColor.getAttribute();
        oWidth = bWidth.getAttribute();
      }
      while(e.hasMoreElements()) {
        ((BorderSettings) e.nextElement()).setValue(bWidth, bColor);
      }
      return success;
    }

    /**
     * get the value of this <code>AttributeComponent</code>
     *
     * @return the value selected from this component
     */
    public AttributeSet getValue() {
      SimpleAttributeSet set = new SimpleAttributeSet();
      BorderSettings bs;
      for(int i = 0; i < components.size(); i++) {
        bs = (BorderSettings) components.elementAt(i);
        bColor.setAttribute(i, bs.getBorderColor());
        bWidth.setAttribute(i, bs.getBorderWidth());
      }
      String newValue = bColor.getAttribute();
        newValue = bWidth.getAttribute(CombinedAttribute.ATTR_TOP);
        Util.styleSheet().addCSSAttribute(set, CSS.Attribute.BORDER_TOP_WIDTH, newValue);
        Util.styleSheet().addCSSAttribute(set, CSS.Attribute.BORDER_RIGHT_WIDTH, newValue);
        Util.styleSheet().addCSSAttribute(set, CSS.Attribute.BORDER_BOTTOM_WIDTH, newValue);
        Util.styleSheet().addCSSAttribute(set, CSS.Attribute.BORDER_LEFT_WIDTH, newValue);

      return set;
    }

    public AttributeSet getValue(boolean includeUnchanged) {
      if(includeUnchanged) {
        SimpleAttributeSet set = new SimpleAttributeSet();
        BorderSettings bs;
        for(int i = 0; i < components.size(); i++) {
          bs = (BorderSettings) components.elementAt(i);
          bColor.setAttribute(i, bs.getBorderColor());
          bWidth.setAttribute(i, bs.getBorderWidth());
        }
        String newValue = bColor.getAttribute();
          newValue = bWidth.getAttribute(CombinedAttribute.ATTR_TOP);
          Util.styleSheet().addCSSAttribute(set, CSS.Attribute.BORDER_TOP_WIDTH, newValue);
          Util.styleSheet().addCSSAttribute(set, CSS.Attribute.BORDER_RIGHT_WIDTH, newValue);
          Util.styleSheet().addCSSAttribute(set, CSS.Attribute.BORDER_BOTTOM_WIDTH, newValue);
          Util.styleSheet().addCSSAttribute(set, CSS.Attribute.BORDER_LEFT_WIDTH, newValue);
        return set;
      }
      else {
        return getValue();
      }
    }

    /**
     * Panel to show and manipulate border settings
     */
    private class BorderSettings extends JPanel {

      /** the border side */
      private int side;

      /** selector for border width */
      private SizeSelectorPanel bWidth;

      /** selector for border color */
      private ColorPanel bColor;

      /**
       * construct a <code>BorderSettings</code> panel
       *
       * @param title  the title of this object
       * @param borderKey  the attribute key for the border width this
       * object represents
       * @param colorKey  the attribute key for the border color this
       * object represents
       */
      public BorderSettings(String title, int side) {
        super();

        this.side = side;
        // set layout
        GridBagLayout g = new GridBagLayout();
        setLayout(g);

        // constraints to use on our GridBagLayout
        GridBagConstraints c = new GridBagConstraints();

        // set border and title
        setBorder(new TitledBorder(new EtchedBorder(
                    EtchedBorder.LOWERED),
                    title));
        // add the width control and label
        Util.addGridBagComponent(this,
                   new JLabel(Util.getResourceString("borderWidthLabel")),
                   g, c, 0, 0, GridBagConstraints.EAST);
        bWidth = new SizeSelectorPanel(CSS.Attribute.BORDER_WIDTH, null, false, SizeSelectorPanel.TYPE_LABEL);
        Util.addGridBagComponent(this,bWidth,
                                 g, c, 1, 0, GridBagConstraints.WEST);

        // add the color control and label
        Util.addGridBagComponent(this,
                   new JLabel(Util.getResourceString("borderColorLabel")),
                   g, c, 0, 1, GridBagConstraints.EAST);
        bColor = new ColorPanel(null, Color.black, CSS.Attribute.BORDER_COLOR);
        Util.addGridBagComponent(this,bColor,
                                 g, c, 1, 1, GridBagConstraints.WEST);
      }

      public String getBorderColor() {
        return bColor.getAttr();
      }

      public String getBorderWidth() {
        return bWidth.getAttr();
      }

      /**
       * set the value of this <code>AttributeComponent</code>
       *
       * @param color  the <code>CombinedAttribute</code> to take the color from
       *
       */
      public void setValue(CombinedAttribute borderWidths, CombinedAttribute borderColors) {
        String attr = borderColors.getAttribute(side);
        //System.out.println("BorderSettings setValue attr='" + attr + "'");
        if(attr != null) {
          this.bColor.setValue(attr);
        }
        attr = borderWidths.getAttribute(side);
        if(attr != null) {
          this.bWidth.setValue(attr);
        }
      }
    }
}