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 }