GUI: added old what's new page (build-in window on startup);

Mage.Client/pom.xml

@@ -144,6 +144,24 @@
             <version>1.17</version>
         </dependency>
         <!-- svg support END -->
+
+        <!-- JavaFX support (build-in browser) START -->
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-controls</artifactId>
+            <version>11.0.2</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-swing</artifactId>
+            <version>11.0.2</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-web</artifactId>
+            <version>11.0.2</version>
+        </dependency>
+        <!-- JavaFX support (build-in browser) END -->
     </dependencies>
 
     <!-- to get the reference to local repository with com\googlecode\jspf\jspf-core\0.9.1\ -->

Mage.Client/src/main/java/mage/client/MageFrame.java

@@ -72,6 +72,8 @@ import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.SocketException;
+import java.net.URI;
+import java.net.URISyntaxException;
 import java.nio.charset.Charset;
 import java.util.*;
 import java.util.concurrent.Executors;
@@ -109,6 +111,7 @@ public class MageFrame extends javax.swing.JFrame implements MageClient {
     private static CallbackClient callbackClient;
     private static final Preferences PREFS = Preferences.userNodeForPackage(MageFrame.class);
     private final JPanel fakeTopPanel;
+    private WhatsNewDialog whatsNewDialog; // can be null
     private JLabel title;
     private Rectangle titleRectangle;
     private static final MageVersion VERSION = new MageVersion(MageFrame.class);
@@ -306,6 +309,15 @@ public class MageFrame extends javax.swing.JFrame implements MageClient {
         errorDialog.setLocation(100, 100);
         desktopPane.add(errorDialog, JLayeredPane.MODAL_LAYER);
 
+        try {
+            this.whatsNewDialog = new WhatsNewDialog();
+        } catch (Throwable e) {
+            // example: JavaFX is not supported on old MacOS with OpenJDK
+            // https://bugs.openjdk.java.net/browse/JDK-8202132
+            LOGGER.error("JavaFX is not supported by your system. What's new page will be disabled.", e);
+            this.whatsNewDialog = null;
+        }
+
         PING_SENDER_EXECUTOR.scheduleAtFixedRate(SessionHandler::ping, TablesPanel.PING_SERVER_SECS, TablesPanel.PING_SERVER_SECS, TimeUnit.SECONDS);
 
         updateMemUsageTask = new UpdateMemUsageTask(jMemUsageLabel);
@@ -384,6 +396,11 @@ public class MageFrame extends javax.swing.JFrame implements MageClient {
             }
             setWindowTitle();
         });
+
+        // run what's new checks (loading in background)
+        SwingUtilities.invokeLater(() -> {
+            showWhatsNewDialog(false);
+        });
     }
 
     private void bootstrapSetsAndFormats() {
@@ -1861,8 +1878,14 @@ public class MageFrame extends javax.swing.JFrame implements MageClient {
         updateTooltipContainerSizes();
     }
 
-    public static void showWhatsNewDialog() {
+    public void showWhatsNewDialog(boolean forceToShowPage) {
-        AppUtil.openUrlInBrowser("https://jaydi85.github.io/xmage-web-news/news.html");
+        if (whatsNewDialog != null) {
+            // build-in browser
+            whatsNewDialog.checkUpdatesAndShow(forceToShowPage);
+        } else {
+            // system browser
+            AppUtil.openUrlInSystemBrowser(WhatsNewDialog.WHATS_NEW_PAGE);
+        }
     }
 
     public boolean isGameFrameActive(UUID gameId) {

Mage.Client/src/main/java/mage/client/dialog/AboutDialog.java

@@ -147,7 +147,7 @@ public class AboutDialog extends MageDialog {
     }//GEN-LAST:event_btnOkActionPerformed
 
     private void btnWhatsNewActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnWhatsNewActionPerformed
-        MageFrame.showWhatsNewDialog();
+        MageFrame.getInstance().showWhatsNewDialog(true);
     }//GEN-LAST:event_btnWhatsNewActionPerformed
 
     // Variables declaration - do not modify//GEN-BEGIN:variables

Mage.Client/src/main/java/mage/client/dialog/ConnectDialog.java

@@ -13,7 +13,6 @@ import mage.utils.StreamUtils;
 import org.apache.log4j.Logger;
 
 import javax.swing.*;
-import java.awt.*;
 import java.awt.event.ActionListener;
 import java.io.*;
 import java.net.*;
@@ -739,11 +738,11 @@ public class ConnectDialog extends MageDialog {
     }//GEN-LAST:event_btnFlagSearchActionPerformed
 
     private void btnCheckStatusActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnCheckStatusActionPerformed
-        AppUtil.openUrlInBrowser("http://xmage.today/servers/");
+        AppUtil.openUrlInSystemBrowser("http://xmage.today/servers/");
     }//GEN-LAST:event_btnCheckStatusActionPerformed
 
     private void btnWhatsNewActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnWhatsNewActionPerformed
-        MageFrame.showWhatsNewDialog();
+        MageFrame.getInstance().showWhatsNewDialog(true);
     }//GEN-LAST:event_btnWhatsNewActionPerformed
 
     private void btnFindMainActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnFindMainActionPerformed

Mage.Client/src/main/java/mage/client/dialog/ErrorDialog.java

@@ -64,7 +64,7 @@ public class ErrorDialog extends MageDialog {
                 CardUtil.urlEncode(title),
                 CardUtil.urlEncode(body)
         );
-        AppUtil.openUrlInBrowser(url);
+        AppUtil.openUrlInSystemBrowser(url);
     }
 
     /** This method is called from within the constructor to

Mage.Client/src/main/java/mage/client/dialog/WhatsNewDialog.form

@@ -0,0 +1,73 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+
+<Form version="1.3" maxVersion="1.9" type="org.netbeans.modules.form.forminfo.JInternalFrameFormInfo">
+  <SyntheticProperties>
+    <SyntheticProperty name="formSizePolicy" type="int" value="1"/>
+  </SyntheticProperties>
+  <AuxValues>
+    <AuxValue name="FormSettings_autoResourcing" type="java.lang.Integer" value="0"/>
+    <AuxValue name="FormSettings_autoSetComponentName" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_generateFQN" type="java.lang.Boolean" value="true"/>
+    <AuxValue name="FormSettings_generateMnemonicsCode" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_i18nAutoMode" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_layoutCodeTarget" type="java.lang.Integer" value="1"/>
+    <AuxValue name="FormSettings_listenerGenerationStyle" type="java.lang.Integer" value="0"/>
+    <AuxValue name="FormSettings_variablesLocal" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_variablesModifier" type="java.lang.Integer" value="2"/>
+  </AuxValues>
+
+  <Layout>
+    <DimensionLayout dim="0">
+      <Group type="103" groupAlignment="0" attributes="0">
+          <Group type="102" alignment="0" attributes="0">
+              <EmptySpace max="-2" attributes="0"/>
+              <Group type="103" groupAlignment="0" attributes="0">
+                  <Component id="panelData" max="32767" attributes="0"/>
+                  <Group type="102" attributes="0">
+                      <Component id="buttonRefresh" min="-2" pref="100" max="-2" attributes="0"/>
+                      <EmptySpace max="32767" attributes="0"/>
+                      <Component id="buttonCancel" min="-2" pref="100" max="-2" attributes="0"/>
+                  </Group>
+              </Group>
+              <EmptySpace max="-2" attributes="0"/>
+          </Group>
+      </Group>
+    </DimensionLayout>
+    <DimensionLayout dim="1">
+      <Group type="103" groupAlignment="0" attributes="0">
+          <Group type="102" alignment="0" attributes="0">
+              <EmptySpace max="-2" attributes="0"/>
+              <Component id="panelData" max="32767" attributes="0"/>
+              <EmptySpace max="-2" attributes="0"/>
+              <Group type="103" groupAlignment="3" attributes="0">
+                  <Component id="buttonCancel" alignment="3" min="-2" pref="30" max="-2" attributes="0"/>
+                  <Component id="buttonRefresh" alignment="3" min="-2" pref="30" max="-2" attributes="0"/>
+              </Group>
+              <EmptySpace max="-2" attributes="0"/>
+          </Group>
+      </Group>
+    </DimensionLayout>
+  </Layout>
+  <SubComponents>
+    <Component class="javax.swing.JButton" name="buttonCancel">
+      <Properties>
+        <Property name="text" type="java.lang.String" value="Close"/>
+      </Properties>
+      <Events>
+        <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="buttonCancelActionPerformed"/>
+      </Events>
+    </Component>
+    <Component class="javax.swing.JButton" name="buttonRefresh">
+      <Properties>
+        <Property name="text" type="java.lang.String" value="Refresh"/>
+      </Properties>
+      <Events>
+        <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="buttonRefreshActionPerformed"/>
+      </Events>
+    </Component>
+    <Container class="javax.swing.JPanel" name="panelData">
+
+      <Layout class="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout"/>
+    </Container>
+  </SubComponents>
+</Form>

Mage.Client/src/main/java/mage/client/dialog/WhatsNewDialog.java

@@ -0,0 +1,411 @@
+package mage.client.dialog;
+
+import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
+import javafx.application.Platform;
+import javafx.beans.value.ChangeListener;
+import javafx.beans.value.ObservableValue;
+import javafx.concurrent.Worker;
+import javafx.embed.swing.JFXPanel;
+import javafx.scene.Scene;
+import javafx.scene.web.WebEngine;
+import javafx.scene.web.WebView;
+import mage.client.MageFrame;
+import mage.client.remote.XmageURLConnection;
+import mage.client.util.AppUtil;
+import mage.client.util.GUISizeHelper;
+import org.apache.log4j.Logger;
+import org.w3c.dom.events.EventListener;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.KeyEvent;
+import java.lang.reflect.Type;
+import java.net.*;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * App GUI: what's new dialog with latest news.
+ * Uses system browser. Shows on app's start after page ready.
+ *
+ * @author JayDi85
+ */
+public class WhatsNewDialog extends MageDialog {
+
+    private static final Logger LOGGER = Logger.getLogger(WhatsNewDialog.class);
+
+    // cookies store tester: https://setcookie.net/
+    public static final String WHATS_NEW_PAGE = "https://jaydi85.github.io/xmage-web-news/news.html";
+    private static final String WHATS_NEW_VERSION_PAGE = "https://jaydi85.github.io/xmage-web-news/news_version.html"; // increment version=123 to auto-shown for all users
+    private static final int WHATS_NEW_MAX_LOAD_TIMEOUT_SECS = 20; // timeout for page loading (example: no network)
+    private static final boolean WHATS_NEW_DEBUG_ENABLE_CONTROLS = false; // default: false, enable it for debug/test
+
+    private final JFXPanel fxPanel;
+    private WebView webView;
+    private WebEngine engine;
+    private boolean isPageReady = false;
+
+    private SwingWorker<Void, Void> lastWaitingWorker = null;
+
+    public WhatsNewDialog() {
+        initComponents();
+        this.setDefaultCloseOperation(HIDE_ON_CLOSE);
+
+        fxPanel = new JFXPanel();
+        panelData.add(fxPanel);
+        webView = null;
+        engine = null;
+
+        createWebView();
+    }
+
+    private void showDialog() {
+        this.setModal(true);
+        this.setResizable(true);
+
+        getRootPane().setDefaultButton(buttonCancel);
+        this.setSize(GUISizeHelper.dialogGuiScaleSize(new Dimension(800, 600)));
+
+        // windows settings
+        MageFrame.getDesktop().remove(this);
+        if (this.isModal()) {
+            MageFrame.getDesktop().add(this, JLayeredPane.MODAL_LAYER);
+        } else {
+            MageFrame.getDesktop().add(this, JLayeredPane.PALETTE_LAYER);
+        }
+        this.makeWindowCentered();
+
+        // Close on "ESC"
+        registerKeyboardAction(e -> onCancel(), KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
+
+        this.setVisible(true);
+    }
+
+    private final SwingWorker<Void, Void> checkUpdatesWorker = new SwingWorker<Void, Void>() {
+        private String newVersion = "";
+
+        @Override
+        public Void doInBackground() {
+            // download version
+            String newsVersion = XmageURLConnection.downloadText(WHATS_NEW_VERSION_PAGE);
+            if (newsVersion.startsWith("version=")) {
+                newVersion = newsVersion.substring("version=".length());
+            }
+            return null;
+        }
+
+        @Override
+        public void done() {
+            SwingUtilities.invokeLater(() -> {
+                String oldVersion = PreferencesDialog.getCachedValue(PreferencesDialog.KEY_NEWS_PAGE_LAST_VERSION, "1");
+
+                boolean isHaveUpdates = newVersion.isEmpty() || !newVersion.equals(oldVersion);
+                if (isHaveUpdates) {
+                    PreferencesDialog.saveValue(PreferencesDialog.KEY_NEWS_PAGE_LAST_VERSION, newVersion);
+                    startBrowser(WHATS_NEW_PAGE);
+                    startWaitingWorker();
+                }
+            });
+        }
+    };
+
+    private void startWaitingWorker() {
+        // wait page ready and open it on complete
+        if (this.lastWaitingWorker != null) {
+            this.lastWaitingWorker.cancel(true);
+        }
+
+        this.lastWaitingWorker = new SwingWorker<Void, Void>() {
+            @Override
+            public Void doInBackground() {
+                // waiting page loading
+                int waitedSecs = 0;
+                while (!isPageReady && waitedSecs <= WHATS_NEW_MAX_LOAD_TIMEOUT_SECS) {
+                    try {
+                        Thread.sleep(1000);
+                    } catch (InterruptedException e) {
+                        Thread.currentThread().interrupt();
+                        return null;
+                    }
+
+                    waitedSecs++;
+                }
+                return null;
+            }
+
+            @Override
+            public void done() {
+                if (isPageReady) {
+                    SwingUtilities.invokeLater(() -> {
+                        showDialog();
+                    });
+                }
+            }
+        };
+        this.lastWaitingWorker.execute();
+    }
+
+    public void checkUpdatesAndShow(boolean forceToShowPage) {
+        // lazy loading in background
+        // shows it on page ready or by force
+
+        if (!forceToShowPage) {
+            // checks version -> start loading -> show on isPageReady
+            checkUpdatesWorker.execute();
+            return;
+        }
+
+        // direct open
+        if (isPageReady) {
+            SwingUtilities.invokeLater(() -> {
+                showDialog();
+            });
+        } else {
+            checkUpdatesWorker.cancel(true);
+            startBrowser(WHATS_NEW_PAGE);
+            startWaitingWorker();
+        }
+    }
+
+
+    /**
+     * Store cookies in preferences
+     */
+    private static class PersistentCookieStore implements CookieStore, Runnable {
+        private final CookieStore store;
+
+        public PersistentCookieStore() {
+            // improved store with save/load feature
+            store = new CookieManager().getCookieStore();
+
+            // load on startup
+            loadFromPrefs();
+
+            // save on app close
+            Runtime.getRuntime().addShutdownHook(new Thread(this));
+        }
+
+        private void saveToPrefs() {
+            // convert cookie to version 1, so it will get full data before save
+            // example: xxx
+            List<String> v1Cookies = store.getCookies().stream()
+                    .peek(c -> c.setVersion(1))
+                    .map(HttpCookie::toString)
+                    .collect(Collectors.toList());
+            PreferencesDialog.saveValue(PreferencesDialog.KEY_NEWS_PAGE_COOKIES, new Gson().toJson(v1Cookies));
+        }
+
+        private void loadFromPrefs() {
+            Type type = new TypeToken<List<String>>() {
+            }.getType();
+            try {
+                String savedData = PreferencesDialog.getCachedValue(PreferencesDialog.KEY_NEWS_PAGE_COOKIES, "");
+                List<String> savedCookies = new Gson().fromJson(savedData, type);
+                if (savedCookies != null) {
+                    savedCookies.forEach(savedCookie -> {
+                        // load as version 1, but convert back to version 0 for compatibility
+                        List<HttpCookie> v1Cookies = HttpCookie.parse("set-cookie2:" + savedCookie.replace("$", ""));
+                        v1Cookies.forEach(realCookie -> {
+                            realCookie.setVersion(0);
+                            store.add(URI.create(realCookie.getDomain()), realCookie);
+                        });
+                    });
+                }
+            } catch (Exception e) {
+                LOGGER.error("News page: catch broken cookies", e);
+            }
+        }
+
+        @Override
+        public void run() {
+            saveToPrefs();
+        }
+
+        @Override
+        public void add(URI uri, HttpCookie cookie) {
+            store.add(uri, cookie);
+        }
+
+        @Override
+        public List<HttpCookie> get(URI uri) {
+            return store.get(uri);
+        }
+
+        @Override
+        public List<HttpCookie> getCookies() {
+            return store.getCookies();
+        }
+
+        @Override
+        public List<URI> getURIs() {
+            return store.getURIs();
+        }
+
+        @Override
+        public boolean remove(URI uri, HttpCookie cookie) {
+            return store.remove(uri, cookie);
+        }
+
+        @Override
+        public boolean removeAll() {
+            return store.removeAll();
+        }
+    }
+
+    private void createWebView() {
+
+        // init web engine and events
+        // https://docs.oracle.com/javafx/2/swing/swing-fx-interoperability.htm
+
+        // workaround for empty dialog on 2+ opens - keep jfx thread alive (by default it exits on parent window close)
+        // see https://stackoverflow.com/a/32104851
+        Platform.setImplicitExit(false);
+
+        Platform.runLater(() -> {
+            webView = new WebView();
+            engine = webView.getEngine();
+            engine.setJavaScriptEnabled(true);
+            engine.setUserAgent(engine.getUserAgent() + " " + XmageURLConnection.getDefaultUserAgent()); // keep system user-agent too
+            if (!WHATS_NEW_DEBUG_ENABLE_CONTROLS) {
+                webView.contextMenuEnabledProperty().setValue(false);
+            }
+
+            CookieManager cookieManager = new CookieManager(new PersistentCookieStore(), CookiePolicy.ACCEPT_ALL);
+            CookieHandler.setDefault(cookieManager);
+
+            // on error
+            engine.getLoadWorker().exceptionProperty().addListener(new ChangeListener<Throwable>() {
+                @Override
+                public void changed(ObservableValue<? extends Throwable> o, Throwable old, final Throwable value) {
+                    if (engine.getLoadWorker().getState() == Worker.State.FAILED
+                            || engine.getLoadWorker().getState() == Worker.State.CANCELLED) {
+                        LOGGER.error("News page: can't load page", value);
+                    }
+                }
+            });
+
+            // on completed
+            engine.getLoadWorker().stateProperty().addListener(new ChangeListener<Worker.State>() {
+                @Override
+                public void changed(ObservableValue ov, Worker.State oldState, Worker.State newState) {
+                    if (newState != Worker.State.SUCCEEDED) {
+                        return;
+                    }
+
+                    if (!WHATS_NEW_DEBUG_ENABLE_CONTROLS) {
+                        // 1. open all page links in real browser, not build-in window
+                        EventListener listener = new EventListener() {
+                            @Override
+                            public void handleEvent(org.w3c.dom.events.Event ev) {
+                                String href = ((org.w3c.dom.Element) ev.getTarget()).getAttribute("href");
+                                ev.preventDefault();
+
+                                // open browser (must check href on null anyway)
+                                if (href != null && href.startsWith("http")) {
+                                    SwingUtilities.invokeLater(() -> AppUtil.openUrlInSystemBrowser(href));
+                                }
+                            }
+                        };
+                        org.w3c.dom.Document doc = engine.getDocument();
+                        org.w3c.dom.NodeList listA = doc.getElementsByTagName("a");
+                        for (int i = 0; i < listA.getLength(); i++) {
+                            ((org.w3c.dom.events.EventTarget) listA.item(i)).addEventListener("click", listener, false);
+                        }
+                    }
+
+                    // 2. all done, build-in browser ready to show
+                    isPageReady = true;
+                }
+            });
+
+            fxPanel.setScene(new Scene(webView));
+        });
+    }
+
+    public void startBrowser(final String startingUrl) {
+        Platform.runLater(() -> {
+            String link = startingUrl;
+            if (!link.startsWith("http")) {
+                link = "http://" + link;
+            }
+            engine.load(link);
+        });
+    }
+
+    private void onCancel() {
+        this.hideDialog();
+    }
+
+    /**
+     * This method is called from within the constructor to initialize the form.
+     * WARNING: Do NOT modify this code. The content of this method is always
+     * regenerated by the Form Editor.
+     */
+    @SuppressWarnings("unchecked")
+    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
+    private void initComponents() {
+
+        buttonCancel = new JButton();
+        buttonRefresh = new JButton();
+        panelData = new JPanel();
+
+        buttonCancel.setText("Close");
+        buttonCancel.addActionListener(new java.awt.event.ActionListener() {
+            public void actionPerformed(java.awt.event.ActionEvent evt) {
+                buttonCancelActionPerformed(evt);
+            }
+        });
+
+        buttonRefresh.setText("Refresh");
+        buttonRefresh.addActionListener(new java.awt.event.ActionListener() {
+            public void actionPerformed(java.awt.event.ActionEvent evt) {
+                buttonRefreshActionPerformed(evt);
+            }
+        });
+
+        panelData.setLayout(new BorderLayout());
+
+        GroupLayout layout = new GroupLayout(getContentPane());
+        getContentPane().setLayout(layout);
+        layout.setHorizontalGroup(
+                layout.createParallelGroup(GroupLayout.Alignment.LEADING)
+                        .addGroup(layout.createSequentialGroup()
+                                .addContainerGap()
+                                .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
+                                        .addComponent(panelData, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                                        .addGroup(layout.createSequentialGroup()
+                                                .addComponent(buttonRefresh, GroupLayout.PREFERRED_SIZE, 100, GroupLayout.PREFERRED_SIZE)
+                                                .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                                                .addComponent(buttonCancel, GroupLayout.PREFERRED_SIZE, 100, GroupLayout.PREFERRED_SIZE)))
+                                .addContainerGap())
+        );
+        layout.setVerticalGroup(
+                layout.createParallelGroup(GroupLayout.Alignment.LEADING)
+                        .addGroup(layout.createSequentialGroup()
+                                .addContainerGap()
+                                .addComponent(panelData, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                                .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
+                                .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
+                                        .addComponent(buttonCancel, GroupLayout.PREFERRED_SIZE, 30, GroupLayout.PREFERRED_SIZE)
+                                        .addComponent(buttonRefresh, GroupLayout.PREFERRED_SIZE, 30, GroupLayout.PREFERRED_SIZE))
+                                .addContainerGap())
+        );
+
+        pack();
+    }// </editor-fold>//GEN-END:initComponents
+
+    private void buttonCancelActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonCancelActionPerformed
+        onCancel();
+    }//GEN-LAST:event_buttonCancelActionPerformed
+
+    private void buttonRefreshActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonRefreshActionPerformed
+        startBrowser(WHATS_NEW_PAGE);
+    }//GEN-LAST:event_buttonRefreshActionPerformed
+
+    // Variables declaration - do not modify//GEN-BEGIN:variables
+    private JButton buttonCancel;
+    private JButton buttonRefresh;
+    private JPanel panelData;
+    // End of variables declaration//GEN-END:variables
+}

Mage.Client/src/main/java/mage/client/remote/XmageURLConnection.java

@@ -141,10 +141,13 @@ public class XmageURLConnection {
             this.connection.setRequestProperty("Accept-Encoding", "gzip");
         }
 
+        this.connection.setRequestProperty("User-Agent", getDefaultUserAgent());
+    }
+
+    public static String getDefaultUserAgent() {
         // user agent due standard notation User-Agent: <product> / <product-version> <comment>
         // warning, dot not add os, language and other details
-        this.connection.setRequestProperty("User-Agent", String.format("XMage/%s build: %s",
+        return String.format("XMage/%s build: %s", version.toString(false), version.getBuildTime());
-                version.toString(false), version.getBuildTime()));
     }
 
     /**

Mage.Client/src/main/java/mage/client/table/TablesPanel.java

@@ -1752,7 +1752,7 @@ public class TablesPanel extends javax.swing.JPanel {
     }//GEN-LAST:event_btnStateFinishedActionPerformed
 
     private void buttonWhatsNewActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonWhatsNewActionPerformed
-        MageFrame.showWhatsNewDialog();
+        MageFrame.getInstance().showWhatsNewDialog(true);
     }//GEN-LAST:event_buttonWhatsNewActionPerformed
 
     private void btnQuickStart2PlayerActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnQuickStartDuelActionPerformed

Mage.Client/src/main/java/mage/client/util/AppUtil.java

@@ -47,7 +47,7 @@ public class AppUtil {
         }
     }
 
-    public static void openUrlInBrowser(String url) {
+    public static void openUrlInSystemBrowser(String url) {
         Desktop desktop = Desktop.isDesktopSupported() ? Desktop.getDesktop() : null;
         if (desktop != null && desktop.isSupported(Desktop.Action.BROWSE)) {
             try {

Mage.Client/src/main/java/mage/client/util/URLHandler.java

@@ -1,12 +1,8 @@
 package mage.client.util;
 
-import java.awt.Desktop;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
-import java.io.IOException;
 import java.net.MalformedURLException;
-import java.net.URI;
-import java.net.URISyntaxException;
 import java.net.URL;
 import javax.swing.*;
 
@@ -48,14 +44,7 @@ public class URLHandler {
                     return;
                 }
                 if (e.getClickCount() > 0) {
-                    if (Desktop.isDesktopSupported()) {
+                    AppUtil.openUrlInSystemBrowser(url);
-                        Desktop desktop = Desktop.getDesktop();
-                        try {
-                            URI uri = new URI(url);
-                            desktop.browse(uri);
-                        } catch (IOException | URISyntaxException ignore) {
-                        }
-                    }
                 }
             }
         };

pom.xml

@@ -343,7 +343,7 @@
                 <!-- json support -->
                 <groupId>com.google.code.gson</groupId>
                 <artifactId>gson</artifactId>
-                <version>2.8.8</version>
+                <version>2.11.0</version>
             </dependency>
             <dependency>
                 <!-- extended lib from google (collections, io, etc) -->