Fix encoding problem on AnsiConsole.out on windows, fixes #79

jansi/src/main/java/org/fusesource/jansi/AnsiConsole.java

@@ -15,6 +15,8 @@
  */
 package org.fusesource.jansi;
 
+import org.fusesource.jansi.internal.Kernel32;
+
 import static org.fusesource.jansi.internal.CLibrary.STDERR_FILENO;
 import static org.fusesource.jansi.internal.CLibrary.STDOUT_FILENO;
 import static org.fusesource.jansi.internal.CLibrary.isatty;
@@ -23,6 +25,8 @@
 import java.io.IOException;
 import java.io.OutputStream;
 import java.io.PrintStream;
+import java.io.UnsupportedEncodingException;
+import java.nio.charset.Charset;
 
 /**
  * Provides consistent access to an ANSI aware console PrintStream.
@@ -33,10 +37,30 @@
 public class AnsiConsole {
 
     public static final PrintStream system_out = System.out;
-    public static final PrintStream out = new PrintStream( wrapOutputStream( system_out ) );
+    public static final PrintStream out;
 
     public static final PrintStream system_err = System.err;
-    public static final PrintStream err = new PrintStream( wrapErrorOutputStream( system_err ) );
+    public static final PrintStream err;
+
+    static {
+        String charset = Charset.defaultCharset().name();
+        String os = System.getProperty("os.name");
+        if (os.startsWith("Windows") && !isXterm()) {
+            int codepage = Kernel32.GetConsoleOutputCP();
+            //http://docs.oracle.com/javase/6/docs/technotes/guides/intl/encoding.doc.html
+            if (Charset.isSupported("ms" + codepage)) {
+                charset = "ms" + codepage;
+            } else if (Charset.isSupported("cp" + codepage)) {
+                charset = "cp" + codepage;
+            }
+        }
+        try {
+            out = new PrintStream(wrapOutputStream(system_out), false, charset);
+            err = new PrintStream(wrapErrorOutputStream(system_err), false, charset);
+        } catch (UnsupportedEncodingException e) {
+            throw new RuntimeException(e);
+        }
+    }
 
     private static int installed;
 

jansi/src/test/java/org/fusesource/jansi/AnsiConsoleExample3.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2009-2017 the original author(s).
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.fusesource.jansi;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+
+/**
+ * Quick test to show issues with non-ascii characters on Windows when using AnsiConsole.
+ * Not really battle-tested for any Windows encoding, but you can update
+ */
+public class AnsiConsoleExample3 {
+
+    private final static String NON_ASCII = "éèä";
+    private AnsiConsoleExample3() {
+    }
+
+    public static void main(String[] args) throws IOException {
+        System.out.println("Platform: " + System.getProperty("os.name"));
+        System.out.println("Platform encoding: " + Charset.defaultCharset());
+        System.out.println("System.out: " + NON_ASCII);
+        AnsiConsole.out.println("AnsiConsole.out: " + NON_ASCII);
+    }
+
+}