Add support for colors in log messages

pom.xml

@@ -63,6 +63,12 @@
       <version>1.9-R0.1-SNAPSHOT</version>
       <scope>provided</scope>
     </dependency>
+    <dependency>
+      <groupId>org.fusesource.jansi</groupId>
+      <artifactId>jansi</artifactId>
+      <version>1.11</version>
+      <scope>provided</scope>
+    </dependency>
   </dependencies>
   <!-- Build behavior -->
   <build>

src/main/java/info/ronjenkins/slf4bukkit/BukkitColorMapper.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2016 Ronald Jack Jenkins Jr.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package info.ronjenkins.slf4bukkit;
+
+import java.util.Map;
+
+import org.bukkit.ChatColor;
+import org.fusesource.jansi.Ansi;
+import org.fusesource.jansi.Ansi.Attribute;
+
+import com.google.common.collect.ImmutableMap;
+
+/**
+ * Utility class that maps {@link ChatColor} values to their JAnsi equivalents,
+ * so that messages logged to the console are formatted correctly.
+ * 
+ * @author Ronald Jack Jenkins Jr.
+ */
+public final class BukkitColorMapper {
+
+  // @formatter:off
+  private static final Map<ChatColor, String> MAP = ImmutableMap.<ChatColor, String>builder()
+    .put(ChatColor.BLACK, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.BLACK).boldOff().toString())
+    .put(ChatColor.DARK_BLUE, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.BLUE).boldOff().toString())
+    .put(ChatColor.DARK_GREEN, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.GREEN).boldOff().toString())
+    .put(ChatColor.DARK_AQUA, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.CYAN).boldOff().toString())
+    .put(ChatColor.DARK_RED, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.RED).boldOff().toString())
+    .put(ChatColor.DARK_PURPLE, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.MAGENTA).boldOff().toString())
+    .put(ChatColor.GOLD, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.YELLOW).boldOff().toString())
+    .put(ChatColor.GRAY, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.WHITE).boldOff().toString())
+    .put(ChatColor.DARK_GRAY, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.BLACK).bold().toString())
+    .put(ChatColor.BLUE, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.BLUE).bold().toString())
+    .put(ChatColor.GREEN, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.GREEN).bold().toString())
+    .put(ChatColor.AQUA, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.CYAN).bold().toString())
+    .put(ChatColor.RED, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.RED).bold().toString())
+    .put(ChatColor.LIGHT_PURPLE, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.MAGENTA).bold().toString())
+    .put(ChatColor.YELLOW, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.YELLOW).bold().toString())
+    .put(ChatColor.WHITE, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.WHITE).bold().toString())
+    .put(ChatColor.MAGIC, Ansi.ansi().a(Attribute.BLINK_SLOW).toString())
+    .put(ChatColor.BOLD, Ansi.ansi().a(Attribute.UNDERLINE_DOUBLE).toString())
+    .put(ChatColor.STRIKETHROUGH, Ansi.ansi().a(Attribute.STRIKETHROUGH_ON).toString())
+    .put(ChatColor.UNDERLINE, Ansi.ansi().a(Attribute.UNDERLINE).toString())
+    .put(ChatColor.ITALIC, Ansi.ansi().a(Attribute.ITALIC).toString())
+    .put(ChatColor.RESET, Ansi.ansi().a(Attribute.RESET).toString())
+  .build();
+  // @formatter:on
+
+  /**
+   * Translates {@link ChatColor} directives to their JAnsi equivalents.
+   * 
+   * @param input
+   *          null is coerced to the empty string.
+   * @return never null.
+   */
+  public static String map(final String input) {
+    if (input == null) return "";
+    String output = input;
+    for (final Map.Entry<ChatColor, String> mapping : MAP.entrySet()) {
+      output = output.replace(mapping.getKey().toString(), mapping.getValue());
+    }
+    return output;
+  }
+
+}

src/main/java/org/slf4j/impl/BukkitPluginLoggerAdapter.java

@@ -44,6 +44,8 @@
  */
 package org.slf4j.impl;
 
+import info.ronjenkins.slf4bukkit.BukkitColorMapper;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
@@ -54,6 +56,7 @@ import java.util.logging.LogRecord;
 import java.util.logging.Logger;
 
 import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
 import org.bukkit.plugin.Plugin;
 import org.slf4j.event.Level;
 import org.slf4j.helpers.FormattingTuple;
@@ -823,12 +826,12 @@ public final class BukkitPluginLoggerAdapter extends MarkerIgnoringBase {
     }
 
     // Append the message
-    buf.append(message);
+    buf.append(message).append(ChatColor.RESET);
 
     // Log to Bukkit
     this.julLog(logger, BukkitPluginLoggerAdapter.CLASS_SELF,
                 BukkitPluginLoggerAdapter.slf4jLevelIntToBukkitJULLevel(level),
-                buf.toString(), t);
+                BukkitColorMapper.map(buf.toString()), t);
   }
 
   private Level recursivelyComputeLevel() {