From 14a590235cbfcc0b707be7fe43570d457915d9ca Mon Sep 17 00:00:00 2001
From: simoleo89 <simoleo89@gmail.com>
Date: Sun, 14 Jun 2026 18:08:50 +0200
Subject: [PATCH] fix(console): install jansi for forced ansi startup

---
 .../src/main/java/com/eu/habbo/Emulator.java  | 41 +++++++++++++------
 .../eu/habbo/EmulatorStartupConsoleTest.java  | 14 +++++++
 2 files changed, 42 insertions(+), 13 deletions(-)

diff --git a/Emulator/src/main/java/com/eu/habbo/Emulator.java b/Emulator/src/main/java/com/eu/habbo/Emulator.java
index 26f113ce..caa28594 100644
--- a/Emulator/src/main/java/com/eu/habbo/Emulator.java
+++ b/Emulator/src/main/java/com/eu/habbo/Emulator.java
@@ -19,6 +19,7 @@ import com.eu.habbo.plugin.events.emulator.EmulatorStoppedEvent;
 import com.eu.habbo.threading.ThreadPooling;
 import com.eu.habbo.util.imager.badges.BadgeImager;
 import com.eu.habbo.util.logback.ConsoleStyle;
+import org.fusesource.jansi.AnsiConsole;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -110,14 +111,12 @@ public final class Emulator {
 
     public static void main(String[] args) throws Exception {
         try {
-            if (OS_NAME.startsWith("Windows") && !CLASS_PATH.contains("idea_rt.jar")) {
-                ch.qos.logback.classic.Logger root = (ch.qos.logback.classic.Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
-                ConsoleAppender<ILoggingEvent> appender = (ConsoleAppender<ILoggingEvent>) root.getAppender("Console");
-
-                appender.stop();
-                appender.setWithJansi(true);
-                appender.start();
-            }
+            boolean styledConsole = shouldStyleConsole(
+                    System.getenv(),
+                    System.console() != null,
+                    OS_NAME,
+                    System.getProperty("habbo.console.style", "auto"));
+            configureAnsiConsole(styledConsole);
 
             Locale.setDefault(Locale.of("en"));
             setBuild();
@@ -125,11 +124,7 @@ public final class Emulator {
             ConsoleCommand.load();
             Emulator.logging = new Logging();
 
-            System.out.println(startupHero(shouldStyleConsole(
-                    System.getenv(),
-                    System.console() != null,
-                    OS_NAME,
-                    System.getProperty("habbo.console.style", "auto"))));
+            System.out.println(startupHero(styledConsole));
 
             long startTime = System.nanoTime();
 
@@ -372,6 +367,26 @@ public final class Emulator {
         return ConsoleStyle.isEnabled(environment, interactiveConsole, osName, styleProperty);
     }
 
+    static void configureAnsiConsole(boolean styledConsole) {
+        if (!styledConsole || !OS_NAME.startsWith("Windows") || CLASS_PATH.contains("idea_rt.jar")) {
+            return;
+        }
+
+        try {
+            AnsiConsole.systemInstall();
+
+            ch.qos.logback.classic.Logger root = (ch.qos.logback.classic.Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
+            ConsoleAppender<ILoggingEvent> appender = (ConsoleAppender<ILoggingEvent>) root.getAppender("Console");
+            if (appender != null) {
+                appender.stop();
+                appender.setWithJansi(true);
+                appender.start();
+            }
+        } catch (Throwable e) {
+            LOGGER.debug("Unable to install Jansi console bridge; continuing with raw console output.", e);
+        }
+    }
+
     private static String fit(String value, int width) {
         String safe = value == null ? "" : value;
         if (safe.length() > width) {
diff --git a/Emulator/src/test/java/com/eu/habbo/EmulatorStartupConsoleTest.java b/Emulator/src/test/java/com/eu/habbo/EmulatorStartupConsoleTest.java
index 3f61b09b..aa496cbe 100644
--- a/Emulator/src/test/java/com/eu/habbo/EmulatorStartupConsoleTest.java
+++ b/Emulator/src/test/java/com/eu/habbo/EmulatorStartupConsoleTest.java
@@ -3,6 +3,8 @@ package com.eu.habbo;
 import org.junit.jupiter.api.Test;
 
 import java.util.Map;
+import java.nio.file.Files;
+import java.nio.file.Path;
 
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
@@ -55,4 +57,16 @@ class EmulatorStartupConsoleTest {
                 "Windows 11",
                 "plain"));
     }
+
+    @Test
+    void windowsAnsiModeInstallsJansiBeforePrintingStartupHero() throws Exception {
+        String source = Files.readString(Path.of("src/main/java/com/eu/habbo/Emulator.java"));
+
+        assertTrue(source.contains("AnsiConsole.systemInstall()"),
+                "forced ANSI mode must install the Jansi bridge for Windows CMD/System.out");
+        assertTrue(source.contains("configureAnsiConsole(styledConsole)"),
+                "console bridge must be configured before startupHero is printed");
+        assertTrue(source.indexOf("configureAnsiConsole(styledConsole)") < source.indexOf("startupHero(styledConsole)"),
+                "Jansi must be installed before writing ANSI startup output");
+    }
 }