/*
* $Id$
*
* Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.jdesktop.swingx.hyperlink;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Logger;
/**
* An bean which represents an URL link.
*
* Text, URL and visited are bound properties. Compares by Text.
*
* @author Mark Davidson
* @author Jeanette Winzenburg
*/
public class LinkModel implements Comparable {
private static final Logger LOG = Logger.getLogger(LinkModel.class
.getName());
private String text; // display text
private URL url; // url of the link
private String target; // url target frame
private boolean visited = false;
private PropertyChangeSupport propertyChangeSupport;
public static final String VISITED_PROPERTY = "visited";
// hack - this class assumes that the url always != null
// need to cleanup
private static String defaultURLString = "https://jdnc.dev.java.net";
private static URL defaultURL;
/**
*
* @param text
* @param target
* @param url
*/
public LinkModel(String text, String target, URL url) {
setText(text);
setTarget(target);
setURL(url != null ? url : getDefaultURL());
}
public LinkModel() {
this(" ", null, null);
}
public LinkModel(String text) {
this(text, null, null);
}
/**
* @param text text to that a renderer would display
* @param target the target that a URL should load into.
* @param template a string that represents a URL with
* &{N} place holders for string substitution
* @param args an array of strings which will be used for substitition
*/
public LinkModel(String text, String target, String template, String[] args) {
setText(text);
setTarget(target);
setURL(createURL(template, args));
}
/**
* Set the display text.
*/
public void setText(String text) {
String old = getText();
this.text = text;
firePropertyChange("text", old, getText());
}
public String getText() {
if (text != null) {
return text;
} else if (url != null) {
return getURL().toString();
}
return null;
}
public void setURLString(String howToURLString) {
URL url = null;
try {
url = new URL(howToURLString);
} catch (MalformedURLException e) {
url = getDefaultURL();
LOG.warning("the given urlString is malformed: " + howToURLString +
"\n falling back to default url: " + url);
}
setURL(url);
}
private URL getDefaultURL() {
if (defaultURL == null) {
try {
defaultURL = new URL(defaultURLString);
} catch (MalformedURLException e) {
LOG.fine("should not happen - defaultURL is wellFormed: "
+ defaultURLString);
}
}
return defaultURL;
}
/**
* Set the url and resets the visited flag.
*
* Think: keep list of visited urls here?
*/
public void setURL(URL url) {
if (url == null) {
throw new IllegalArgumentException("URL for link cannot be null");
}
if (url.equals(getURL()))
return;
URL old = getURL();
this.url = url;
firePropertyChange("URL", old, url);
setVisited(false);
}
public URL getURL() {
return url;
}
/**
* Create a URL from a template string that has place holders and an array
* of strings which will be substituted into the place holders. The place
* holders are represented as
*
* @{N} where N = { 1..n }
* <p>
* For example, if the template contains a string like:
* http://bugz.sfbay/cgi-bin/showbug?cat=@{1}&sub_cat=@{2} and a two
* arg array contains: java, classes_swing The resulting URL will be:
* http://bugz.sfbay/cgi-bin/showbug?cat=java&sub_cat=classes_swing
* <p>
* @param template a url string that contains the placeholders
* @param args an array of strings that will be substituted
*/
private URL createURL(String template, String[] args) {
URL url = null;
try {
String urlStr = template;
for (int i = 0; i < args.length; i++) {
urlStr = urlStr.replaceAll("@\\{" + (i + 1) + "\\}", args[i]);
}
url = new URL(urlStr);
} catch (MalformedURLException ex) {
//
}
return url;
}
/**
* Set the target that the URL should load into. This can be a uri
* representing another control or the name of a window or special targets.
* See: http://www.w3c.org/TR/html401/present/frames.html#adef-target
*/
public void setTarget(String target) {
this.target = target;
}
/**
* Return the target for the URL.
*
* @return value of the target. If null then "_blank" will be returned.
*/
public String getTarget() {
if (target != null) {
return target;
} else {
return "_blank";
}
}
/**
* Sets a flag to indicate if the link has been visited. The state of this
* flag can be used to render the color of the link.
*/
public void setVisited(boolean visited) {
boolean old = getVisited();
this.visited = visited;
firePropertyChange(VISITED_PROPERTY, old, getVisited());
}
public boolean getVisited() {
return visited;
}
// ---------------------- property change notification
public void addPropertyChangeListener(PropertyChangeListener l) {
getPropertyChangeSupport().addPropertyChangeListener(l);
}
public void removePropertyChangeListener(PropertyChangeListener l) {
if (propertyChangeSupport == null)
return;
propertyChangeSupport.removePropertyChangeListener(l);
}
protected void firePropertyChange(String property, Object oldValue,
Object newValue) {
if (propertyChangeSupport == null)
return;
propertyChangeSupport.firePropertyChange(property, oldValue, newValue);
}
protected void firePropertyChange(String property, boolean oldValue,
boolean newValue) {
if (propertyChangeSupport == null)
return;
propertyChangeSupport.firePropertyChange(property, oldValue, newValue);
}
private PropertyChangeSupport getPropertyChangeSupport() {
if (propertyChangeSupport == null) {
propertyChangeSupport = new PropertyChangeSupport(this);
}
return propertyChangeSupport;
}
// Comparable interface for sorting.
public int compareTo(Object obj) {
if (obj == null) {
return 1;
}
if (obj == this) {
return 0;
}
return text.compareTo(((LinkModel) obj).text);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj != null && obj instanceof LinkModel) {
LinkModel other = (LinkModel) obj;
if (!getText().equals(other.getText())) {
return false;
}
if (!getTarget().equals(other.getTarget())) {
return false;
}
return getURL().equals(other.getURL());
}
return false;
}
@Override
public int hashCode() {
int result = 7;
result = 37 * result + ((getText() == null) ? 0 : getText().hashCode());
result = 37 * result
+ ((getTarget() == null) ? 1 : getTarget().hashCode());
result = 37 * result + ((getURL() == null) ? 2 : getURL().hashCode());
return result;
}
@Override
public String toString() {
StringBuffer buffer = new StringBuffer("[");
// RG: Fix for J2SE 5.0; Can't cascade append() calls because
// return type in StringBuffer and AbstractStringBuilder are different
buffer.append("url=");
buffer.append(url);
buffer.append(", target=");
buffer.append(target);
buffer.append(", text=");
buffer.append(text);
buffer.append("]");
return buffer.toString();
}
}