001/* 002 * $Id: EditorPaneLinkVisitor.java 3927 2011-02-22 16:34:11Z kleopatra $ 003 * 004 * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle, 005 * Santa Clara, California 95054, U.S.A. All rights reserved. 006 * 007 * This library is free software; you can redistribute it and/or 008 * modify it under the terms of the GNU Lesser General Public 009 * License as published by the Free Software Foundation; either 010 * version 2.1 of the License, or (at your option) any later version. 011 * 012 * This library is distributed in the hope that it will be useful, 013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 015 * Lesser General Public License for more details. 016 * 017 * You should have received a copy of the GNU Lesser General Public 018 * License along with this library; if not, write to the Free Software 019 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 020 */ 021package org.jdesktop.swingx.hyperlink; 022 023import java.awt.event.ActionEvent; 024import java.awt.event.ActionListener; 025import java.io.IOException; 026import java.net.URL; 027 028import javax.swing.SwingUtilities; 029import javax.swing.event.HyperlinkEvent; 030import javax.swing.event.HyperlinkListener; 031import javax.swing.text.Document; 032 033import org.jdesktop.swingx.JXEditorPane; 034 035 036/** 037 * A ActionListener using a JXEditorPane to "visit" a LinkModel. 038 * 039 * adds an internal HyperlinkListener to visit links contained 040 * in the document. 041 * 042 * @author Jeanette Winzenburg 043 */ 044public class EditorPaneLinkVisitor implements ActionListener { 045 private JXEditorPane editorPane; 046 private HyperlinkListener hyperlinkListener; 047 private LinkModel internalLink; 048 049 public EditorPaneLinkVisitor() { 050 this(null); 051 } 052 053 public EditorPaneLinkVisitor(JXEditorPane pane) { 054 if (pane == null) { 055 pane = createDefaultEditorPane(); 056 } 057 this.editorPane = pane; 058 pane.addHyperlinkListener(getHyperlinkListener()); 059 } 060 061 062 public JXEditorPane getOutputComponent() { 063 return editorPane; 064 } 065 066 @Override 067 public void actionPerformed(ActionEvent e) { 068 if (e.getSource() instanceof LinkModel) { 069 final LinkModel link = (LinkModel) e.getSource(); 070 SwingUtilities.invokeLater(new Runnable() { 071 @Override 072 public void run() { 073 visit(link); 074 075 } 076 }); 077 } 078 079 } 080 081 public void visit(LinkModel link) { 082 try { 083 // make sure to reload 084 editorPane.getDocument().putProperty(Document.StreamDescriptionProperty, null); 085 // JW: editorPane defaults to asynchronous loading 086 // no need to explicitly start a thread - really? 087 editorPane.setPage(link.getURL()); 088 link.setVisited(true); 089 } catch (IOException e1) { 090 editorPane.setText("<html>Error 404: couldn't show " + link.getURL() + " </html>"); 091 } 092 } 093 094 protected JXEditorPane createDefaultEditorPane() { 095 final JXEditorPane editorPane = new JXEditorPane(); 096 editorPane.setEditable(false); 097 editorPane.setContentType("text/html"); 098 return editorPane; 099 } 100 101 protected HyperlinkListener getHyperlinkListener() { 102 if (hyperlinkListener == null) { 103 hyperlinkListener = createHyperlinkListener(); 104 } 105 return hyperlinkListener; 106 } 107 108 protected HyperlinkListener createHyperlinkListener() { 109 return new HyperlinkListener() { 110 @Override 111 public void hyperlinkUpdate(HyperlinkEvent e) { 112 if (HyperlinkEvent.EventType.ACTIVATED == e.getEventType()) { 113 visitInternal(e.getURL()); 114 } 115 116 } 117 118 }; 119 } 120 121 protected LinkModel getInternalLink() { 122 if (internalLink == null) { 123 internalLink = new LinkModel("internal"); 124 } 125 return internalLink; 126 } 127 128 protected void visitInternal(URL url) { 129 try { 130 getInternalLink().setURL(url); 131 visit(getInternalLink()); 132 } catch (Exception e) { 133 // todo: error feedback 134 } 135 } 136 137 138}