Improve ServerGUI

- Added logo to server frame
- Show tps in the server stats

paper-server/patches/sources/net/minecraft/server/gui/MinecraftServerGui.java.patch

@@ -1,6 +1,22 @@
 --- a/net/minecraft/server/gui/MinecraftServerGui.java
 +++ b/net/minecraft/server/gui/MinecraftServerGui.java
-@@ -95,8 +95,8 @@
+@@ -59,6 +59,15 @@
+         jframe.pack();
+         jframe.setLocationRelativeTo((Component) null);
+         jframe.setVisible(true);
++        jframe.setName("Minecraft server"); // Paper - Improve ServerGUI
++
++        // Paper start - Improve ServerGUI
++        try {
++            jframe.setIconImage(javax.imageio.ImageIO.read(Objects.requireNonNull(MinecraftServerGui.class.getClassLoader().getResourceAsStream("logo.png"))));
++        } catch (java.io.IOException ignore) {
++        }
++        // Paper end - Improve ServerGUI
++
+         jframe.addWindowListener(new WindowAdapter() {
+             public void windowClosing(WindowEvent windowevent) {
+                 if (!servergui.isClosing.getAndSet(true)) {
+@@ -95,8 +104,8 @@
  
      private JComponent buildInfoPanel() {
          JPanel jpanel = new JPanel(new BorderLayout());
@@ -11,7 +27,7 @@
  
          Objects.requireNonNull(guistatscomponent);
          collection.add(guistatscomponent::close);
-@@ -132,7 +132,7 @@
+@@ -132,7 +141,7 @@
  
              jtextfield.setText("");
          });
@@ -20,7 +36,7 @@
              public void focusGained(FocusEvent focusevent) {}
          });
          jpanel.add(jscrollpane, "Center");
-@@ -166,6 +166,7 @@
+@@ -166,6 +175,7 @@
          this.finalizers.forEach(Runnable::run);
      }
  
@@ -28,7 +44,7 @@
      public void print(JTextArea textArea, JScrollPane scrollPane, String message) {
          if (!SwingUtilities.isEventDispatchThread()) {
              SwingUtilities.invokeLater(() -> {
-@@ -181,7 +182,7 @@
+@@ -181,7 +191,7 @@
              }
  
              try {

paper-server/patches/sources/net/minecraft/server/gui/StatsComponent.java.patch

@@ -0,0 +1,33 @@
+--- a/net/minecraft/server/gui/StatsComponent.java
++++ b/net/minecraft/server/gui/StatsComponent.java
+@@ -34,10 +34,19 @@
+ 
+     private void tick() {
+         long l = Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
++        // Paper start - Improve ServerGUI
++        double[] tps = org.bukkit.Bukkit.getTPS();
++        String[] tpsAvg = new String[tps.length];
++
++        for ( int g = 0; g < tps.length; g++) {
++            tpsAvg[g] = format( tps[g] );
++        }
+         this.msgs[0] = "Memory use: " + l / 1024L / 1024L + " mb (" + Runtime.getRuntime().freeMemory() * 100L / Runtime.getRuntime().maxMemory() + "% free)";
+         this.msgs[1] = "Avg tick: "
+             + DECIMAL_FORMAT.format((double)this.server.getAverageTickTimeNanos() / (double)TimeUtil.NANOSECONDS_PER_MILLISECOND)
+             + " ms";
++        this.msgs[2] = "TPS from last 1m, 5m, 15m: " + String.join(", ", tpsAvg);
++        // Paper end - Improve ServerGUI
+         this.values[this.vp++ & 0xFF] = (int)(l * 100L / Runtime.getRuntime().maxMemory());
+         this.repaint();
+     }
+@@ -66,4 +75,10 @@
+     public void close() {
+         this.timer.stop();
+     }
++
++    // Paper start - Improve ServerGUI
++    private static String format(double tps) {
++        return (( tps > 21.0 ) ? "*" : "") + Math.min(Math.round(tps * 100.0) / 100.0, 20.0); // only print * at 21, we commonly peak to 20.02 as the tick sleep is not accurate enough, stop the noise
++    }
++    // Paper end - Improve ServerGUI
+ }

paper-server/src/main/java/com/destroystokyo/paper/gui/RAMDetails.java

@@ -58,9 +58,22 @@ public class RAMDetails extends JList<String> {
     public void update() {
         GraphData data = RAMGraph.DATA.peekLast();
         Vector<String> vector = new Vector<>();
+
+        // Follows CraftServer#getTPS
+        double[] tps = new double[] {
+            server.tps1.getAverage(),
+            server.tps5.getAverage(),
+            server.tps15.getAverage()
+        };
+        String[] tpsAvg = new String[tps.length];
+
+        for ( int g = 0; g < tps.length; g++) {
+            tpsAvg[g] = format( tps[g] );
+        }
         vector.add("Memory use: " + (data.getUsedMem() / 1024L / 1024L) + " mb (" + (data.getFree() * 100L / data.getMax()) + "% free)");
         vector.add("Heap: " + (data.getTotal() / 1024L / 1024L) + " / " + (data.getMax() / 1024L / 1024L) + " mb");
         vector.add("Avg tick: " + DECIMAL_FORMAT.format((double)this.server.getAverageTickTimeNanos() / (double) TimeUtil.NANOSECONDS_PER_MILLISECOND) + " ms");
+        vector.add("TPS from last 1m, 5m, 15m: " + String.join(", ", tpsAvg));
         setListData(vector);
     }
 
@@ -71,4 +84,8 @@ public class RAMDetails extends JList<String> {
         }
         return ((double) total / (double) tickTimes.length) * 1.0E-6D;
     }
+
+    private static String format(double tps) {
+        return ( ( tps > 21.0 ) ? "*" : "" ) + Math.min( Math.round( tps * 100.0 ) / 100.0, 20.0 );
+    }
 }