/*
Violet - A program for editing UML diagrams.
Copyright (C) 2002 Cay S. Horstmann (http://horstmann.com)
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.horstmann.violet.framework;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.io.Serializable;
import java.util.Arrays;
import java.util.List;
import java.util.StringTokenizer;
import javax.swing.JLabel;
/**
A string that can extend over multiple lines.
*/
public class MultiLineString implements Cloneable, Serializable
{
/**
Constructs an empty, centered, normal size multiline
string that is not underlined.
*/
public MultiLineString()
{
text = "";
justification = CENTER;
size = NORMAL;
underlined = false;
}
/**
Sets the value of the text property.
@param newValue the text of the multiline string
*/
public void setText(String newValue) { text = newValue; }
/**
Gets the value of the text property.
@return the text of the multiline string
*/
public String getText() { return text; }
/**
Sets the value of the justification property.
@param newValue the justification, one of LEFT, CENTER,
RIGHT
*/
public void setJustification(int newValue) { justification = newValue; }
/**
Gets the value of the justification property.
@return the justification, one of LEFT, CENTER,
RIGHT
*/
public int getJustification() { return justification; }
/**
Gets the value of the underlined property.
@return true if the text is underlined
*/
public boolean isUnderlined() { return underlined; }
/**
Sets the value of the underlined property.
@param newValue true to underline the text
*/
public void setUnderlined(boolean newValue) { underlined = newValue; }
/**
Sets the value of the size property.
@param newValue the size, one of SMALL, NORMAL, LARGE
*/
public void setSize(int newValue) { size = newValue; }
/**
Gets the value of the size property.
@return the size, one of SMALL, NORMAL, LARGE
*/
public int getSize() { return size; }
public String toString()
{
return text.replace('\n', '|');
}
private void setLabelText()
{
StringBuffer prefix = new StringBuffer();
StringBuffer suffix = new StringBuffer();
StringBuffer htmlText = new StringBuffer();
prefix.append(" ");
suffix.insert(0, " ");
if (underlined)
{
prefix.append("<u>");
suffix.insert(0, "</u>");
}
if (size == LARGE)
{
prefix.append("<font size=\"+1\">");
suffix.insert(0, "</font>");
}
if (size == SMALL)
{
prefix.append("<font size=\"-1\">");
suffix.insert(0, "</font>");
}
htmlText.append("<html>");
StringTokenizer tokenizer = new StringTokenizer(text, "\n");
boolean first = true;
while (tokenizer.hasMoreTokens())
{
if (first) first = false; else htmlText.append("<br>");
htmlText.append(prefix);
htmlText.append(tokenizer.nextToken());
htmlText.append(suffix);
}
htmlText.append("</html>");
// replace any < that are not followed by {u, i, b, tt, font, br} with <
List dontReplace = Arrays.asList(new String[] { "u", "i", "b", "tt", "font", "br" });
int ltpos = 0;
while (ltpos != -1)
{
ltpos = htmlText.indexOf("<", ltpos + 1);
if (ltpos != -1 && !(ltpos + 1 < htmlText.length() && htmlText.charAt(ltpos + 1) == '/'))
{
int end = ltpos + 1;
while (end < htmlText.length() && Character.isLetter(htmlText.charAt(end))) end++;
if (!dontReplace.contains(htmlText.substring(ltpos + 1, end)))
htmlText.replace(ltpos, ltpos+1, "<");
}
}
label.setText(htmlText.toString());
if (justification == LEFT) label.setHorizontalAlignment(JLabel.LEFT);
else if (justification == CENTER) label.setHorizontalAlignment(JLabel.CENTER);
else if (justification == RIGHT) label.setHorizontalAlignment(JLabel.RIGHT);
}
/**
Gets the bounding rectangle for this multiline string.
@param g2 the graphics context
@return the bounding rectangle (with top left corner (0,0))
*/
public Rectangle2D getBounds(Graphics2D g2)
{
if (text.length() == 0) return new Rectangle2D.Double();
setLabelText();
Dimension dim = label.getPreferredSize();
return new Rectangle2D.Double(0, 0, dim.getWidth(), dim.getHeight());
}
/**
Draws this multiline string inside a given rectangle
@param g2 the graphics context
@param r the rectangle into which to place this multiline string
*/
public void draw(Graphics2D g2, Rectangle2D r)
{
setLabelText();
label.setFont(g2.getFont());
label.setBounds(0, 0, (int) r.getWidth(), (int) r.getHeight());
g2.translate(r.getX(), r.getY());
label.paint(g2);
g2.translate(-r.getX(), -r.getY());
}
public Object clone()
{
try
{
return super.clone();
}
catch (CloneNotSupportedException exception)
{
return null;
}
}
public static final int LEFT = 0;
public static final int CENTER = 1;
public static final int RIGHT = 2;
public static final int LARGE = 3;
public static final int NORMAL = 4;
public static final int SMALL = 5;
private static final int GAP = 3;
private String text;
private int justification;
private int size;
private boolean underlined;
private static JLabel label = new JLabel();
}