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// HTMLParser Library $Name: v1_5 $ - A java-based parser for HTML
// http://sourceforge.org/projects/htmlparser
// Copyright (C) 2004 Derrick Oswald
//
// Revision Control Information
//
// $Source: /cvsroot/htmlparser/htmlparser/src/org/htmlparser/beans/HTMLTextBean.java,v $
// $Author: derrickoswald $
// $Date: 2005/05/15 11:49:03 $
// $Revision: 1.24 $
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
package org.htmlparser.beans;
import java.awt.Dimension;
import java.awt.FontMetrics;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.Serializable;
import java.net.URLConnection;
import javax.swing.JTextArea;
/**
* Display the textual URL contents.
* @author Derrick Oswald
* Created on December 24, 2002, 3:49 PM
*/
public class HTMLTextBean
extends
JTextArea
implements
Serializable,
PropertyChangeListener
{
/**
* The underlying bean that provides our htmlparser specific properties.
*/
protected StringBean mBean;
/**
* Creates a new HTMLTextBean.
* This uses an underlying StringBean and displays the text.
*/
public HTMLTextBean ()
{
getBean ().addPropertyChangeListener (this);
}
/**
* Return the minimum dimension for this visible bean.
* @return a minimum bounding box for this bean.
*/
public Dimension getMinimumSize ()
{
FontMetrics met;
int width;
int height;
met = getFontMetrics (getFont ());
width = met.stringWidth ("Hello World");
height = met.getLeading () + met.getHeight () + met.getDescent ();
return (new Dimension (width, height));
}
/**
* Add a PropertyChangeListener to the listener list.
* The listener is registered for all properties.
* Delegates to the underlying StringBean
* @param listener The PropertyChangeListener to be added.
*/
public void addPropertyChangeListener (PropertyChangeListener listener)
{
super.addPropertyChangeListener (listener);
getBean ().addPropertyChangeListener (listener);
}
/**
* Remove a PropertyChangeListener from the listener list.
* This removes a registered PropertyChangeListener.
*
Delegates to the underlying StringBean
* @param listener The PropertyChangeListener to be removed.
*/
public void removePropertyChangeListener (PropertyChangeListener listener)
{
super.addPropertyChangeListener (listener);
getBean ().removePropertyChangeListener (listener);
}
//
// Properties
//
/**
* Return the underlying bean object.
* Creates a new one if it hasn't been initialized yet.
* @return The StringBean this bean uses to fetch text.
*/
public StringBean getBean ()
{
if (null == mBean)
mBean = new StringBean ();
return (mBean);
}
/**
* Getter for property strings.
*
Delegates to the underlying StringBean
* @return Value of property strings.
*/
public String getStrings ()
{
return (getBean ().getStrings ());
}
/**
* Getter for property links.
*
Delegates to the underlying StringBean
* @return Value of property links.
*/
public boolean getLinks ()
{
return (getBean ().getLinks ());
}
/**
* Setter for property links.
*
Delegates to the underlying StringBean
* @param links New value of property links.
*/
public void setLinks (boolean links)
{
getBean ().setLinks (links);
}
/**
* Getter for property URL.
*
Delegates to the underlying StringBean
* @return Value of property URL.
*/
public String getURL ()
{
return (getBean ().getURL ());
}
/**
* Setter for property URL.
*
Delegates to the underlying StringBean
* @param url New value of property URL.
*/
public void setURL (String url)
{
getBean ().setURL (url);
}
/**
* Get the current 'replace non breaking spaces' state.
* @return The true if non-breaking spaces (character '\u00a0',
* numeric character reference &160; or character entity reference )
* are to be replaced with normal spaces (character '\u0020').
*/
public boolean getReplaceNonBreakingSpaces ()
{
return (getBean ().getReplaceNonBreakingSpaces ());
}
/**
* Set the 'replace non breaking spaces' state.
* @param replace true if non-breaking spaces (character '\u00a0',
* numeric character reference &160; or character entity reference )
* are to be replaced with normal spaces (character '\u0020').
*/
public void setReplaceNonBreakingSpaces (boolean replace)
{
getBean ().setReplaceNonBreakingSpaces (replace);
}
/**
* Get the current 'collapse whitespace' state.
* If set to true this emulates the operation of browsers
* in interpretting text where auser agents should collapse input white
* space sequences when producing output inter-word space.
* See HTML specification section 9.1 White space
* http://www.w3.org/TR/html4/struct/text.html#h-9.1
* @return true if sequences of whitespace (space '\u0020',
* tab '\u0009', form feed '\u000C', zero-width space '\u200B',
* carriage-return '\r' and newline '\n') are to be replaced with a single
* space.
*/
public boolean getCollapse ()
{
return (getBean ().getCollapse ());
}
/**
* Set the current 'collapse whitespace' state.
* @param collapse If true, sequences of whitespace
* will be reduced to a single space.
*/
public void setCollapse (boolean collapse)
{
getBean ().setCollapse (collapse);
}
/**
* Getter for property Connection.
* @return Value of property Connection.
*/
public URLConnection getConnection ()
{
return (getBean ().getConnection ());
}
/**
* Setter for property Connection.
* @param connection New value of property Connection.
*/
public void setConnection (URLConnection connection)
{
getBean ().setConnection (connection);
}
//
// PropertyChangeListener inteface
//
/**
* Responds to changes in the underlying bean's properties.
* @param event The event triggering this listener method call.
*/
public void propertyChange (PropertyChangeEvent event)
{
if (event.getPropertyName ().equals (StringBean.PROP_STRINGS_PROPERTY))
{
setText (getBean ().getStrings ());
setCaretPosition (0);
}
}
// /**
// * Unit test.
// */
// public static void main (String[] args)
// {
// HTMLTextBean tb = new HTMLTextBean ();
// tb.setURL ("http://cbc.ca");
// // tb.setLinks (true);
// javax.swing.JFrame frame = new javax.swing.JFrame ();
// frame.getContentPane ().setLayout (new BorderLayout ());
// frame.getContentPane ().add (new JScrollPane (tb),
// BorderLayout.CENTER);
// frame.addWindowListener (new java.awt.event.WindowListener () {
// public void windowOpened (java.awt.event.WindowEvent e) {}
// public void windowClosing (java.awt.event.WindowEvent e)
// {
// System.exit (0);
// }
// public void windowClosed (java.awt.event.WindowEvent e) {}
// public void windowDeiconified (java.awt.event.WindowEvent e) {}
// public void windowIconified (java.awt.event.WindowEvent e) {}
// public void windowActivated (java.awt.event.WindowEvent e) {}
// public void windowDeactivated (java.awt.event.WindowEvent e) {}
// });
// frame.setBounds (100, 100, 640, 480);
// frame.show ();
// }
}