001 // License: GPL. See LICENSE file for details. 002 003 package org.openstreetmap.josm.gui; 004 005 import static org.openstreetmap.josm.tools.I18n.tr; 006 007 import java.awt.BorderLayout; 008 import java.awt.EventQueue; 009 import java.awt.event.InputEvent; 010 import java.awt.event.KeyEvent; 011 import java.io.IOException; 012 import java.io.UnsupportedEncodingException; 013 import java.net.URL; 014 import java.util.regex.Matcher; 015 import java.util.regex.Pattern; 016 017 import javax.swing.JComponent; 018 import javax.swing.JEditorPane; 019 import javax.swing.JPanel; 020 import javax.swing.JScrollPane; 021 import javax.swing.KeyStroke; 022 import javax.swing.border.EmptyBorder; 023 import javax.swing.event.HyperlinkEvent; 024 import javax.swing.event.HyperlinkListener; 025 026 import org.openstreetmap.josm.Main; 027 import org.openstreetmap.josm.data.Version; 028 import org.openstreetmap.josm.io.CacheCustomContent; 029 import org.openstreetmap.josm.tools.LanguageInfo; 030 import org.openstreetmap.josm.tools.OpenBrowser; 031 import org.openstreetmap.josm.tools.WikiReader; 032 033 public class GettingStarted extends JPanel { 034 private String content = ""; 035 private static final String STYLE = "<style type=\"text/css\">\n" 036 + "body {font-family: sans-serif; font-weight: bold; }\n" 037 + "h1 {text-align: center; }\n" 038 + ".icon {font-size: 0; }\n" 039 + "</style>\n"; 040 041 public static class LinkGeneral extends JEditorPane implements HyperlinkListener { 042 public LinkGeneral(String text) { 043 setContentType("text/html"); 044 setText(text); 045 setEditable(false); 046 setOpaque(false); 047 addHyperlinkListener(this); 048 } 049 050 public void hyperlinkUpdate(HyperlinkEvent e) { 051 if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) { 052 OpenBrowser.displayUrl(e.getDescription()); 053 } 054 } 055 } 056 057 /** 058 * Grabs current MOTD from cache or webpage and parses it. 059 */ 060 private static class MotdContent extends CacheCustomContent<IOException> { 061 public MotdContent() { 062 super("motd.html", CacheCustomContent.INTERVAL_DAILY); 063 } 064 065 final private int myVersion = Version.getInstance().getVersion(); 066 final private String myLang = LanguageInfo.getWikiLanguagePrefix(); 067 068 /** 069 * This function gets executed whenever the cached files need updating 070 * @see org.openstreetmap.josm.io.CacheCustomContent#updateData() 071 */ 072 @Override 073 protected byte[] updateData() throws IOException { 074 String motd = new WikiReader().readLang("StartupPage"); 075 // Save this to prefs in case JOSM is updated so MOTD can be refreshed 076 Main.pref.putInteger("cache.motd.html.version", myVersion); 077 Main.pref.put("cache.motd.html.lang", myLang); 078 try { 079 return motd.getBytes("utf-8"); 080 } catch(UnsupportedEncodingException e){ 081 e.printStackTrace(); 082 return new byte[0]; 083 } 084 } 085 086 /** 087 * Additionally check if JOSM has been updated and refresh MOTD 088 */ 089 @Override 090 protected boolean isCacheValid() { 091 // We assume a default of myVersion because it only kicks in in two cases: 092 // 1. Not yet written - but so isn't the interval variable, so it gets updated anyway 093 // 2. Cannot be written (e.g. while developing). Obviously we don't want to update 094 // everytime because of something we can't read. 095 return (Main.pref.getInteger("cache.motd.html.version", -999) == myVersion) 096 && Main.pref.get("cache.motd.html.lang").equals(myLang); 097 } 098 } 099 100 /** 101 * Initializes getting the MOTD as well as enabling the FileDrop Listener. Displays a message 102 * while the MOTD is downloading. 103 */ 104 public GettingStarted() { 105 super(new BorderLayout()); 106 final LinkGeneral lg = new LinkGeneral("<html>" + STYLE + "<h1>" + "JOSM - " + tr("Java OpenStreetMap Editor") 107 + "</h1><h2 align=\"center\">" + tr("Downloading \"Message of the day\"") + "</h2></html>"); 108 // clear the build-in command ctrl+shift+O, because it is used as shortcut in JOSM 109 lg.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.SHIFT_MASK | InputEvent.CTRL_MASK), "none"); 110 111 JScrollPane scroller = new JScrollPane(lg); 112 scroller.setViewportBorder(new EmptyBorder(10, 100, 10, 100)); 113 add(scroller, BorderLayout.CENTER); 114 115 // Asynchronously get MOTD to speed-up JOSM startup 116 Thread t = new Thread(new Runnable() { 117 @Override 118 public void run() { 119 if (content.isEmpty() && Main.pref.getBoolean("help.displaymotd", true)) { 120 try { 121 content = new MotdContent().updateIfRequiredString(); 122 } catch (IOException ex) { 123 System.out.println(tr("Warning: failed to read MOTD. Exception was: {0}", ex.toString())); 124 content = "<html>" + STYLE + "<h1>" + "JOSM - " + tr("Java OpenStreetMap Editor") 125 + "</h1>\n<h2 align=\"center\">(" + tr("Message of the day not available") + ")</h2></html>"; 126 } 127 } 128 129 EventQueue.invokeLater(new Runnable() { 130 @Override 131 public void run() { 132 lg.setText(fixImageLinks(content)); 133 // lg.moveCaretPosition(0); 134 } 135 }); 136 } 137 }, "MOTD-Loader"); 138 t.setDaemon(true); 139 t.start(); 140 141 new FileDrop(scroller); 142 } 143 144 private String fixImageLinks(String s) { 145 Matcher m = Pattern.compile("src=\"http://josm.openstreetmap.de/browser/trunk(/images/.*?\\.png)\\?format=raw\"").matcher(s); 146 StringBuffer sb = new StringBuffer(); 147 while (m.find()) { 148 String im = m.group(1); 149 URL u = getClass().getResource(im); 150 if (u != null) { 151 m.appendReplacement(sb, Matcher.quoteReplacement("src=\"" + u.toString() + "\"")); 152 } 153 } 154 m.appendTail(sb); 155 return sb.toString(); 156 } 157 }