Leveraged com.diogonunes:JColor library to colorize output bits on supporting ANSI platforms

build.gradle

@@ -49,6 +49,7 @@ dependencies {
     compile 'io.rudefox:vixen:0.0.3'
     compile 'info.picocli:picocli:4.5.1'
     compile 'com.google.zxing:core:3.4.0'
+    compile 'com.diogonunes:JColor:5.0.0'
     testCompile 'com.bjdweck.test:commons-test:0.0.1'
     testCompile "org.junit.jupiter:junit-jupiter-params:$junitVersion"
     testImplementation "org.junit.jupiter:junit-jupiter-api:$junitVersion"

src/main/java/io/rudefox/burrow/Dice8EntropyGenerator.java

@@ -1,23 +1,32 @@
 package io.rudefox.burrow;
 
 import com.bjdweck.bitcoin.mnemonic.Entropy;
+import com.diogonunes.jcolor.AnsiFormat;
 
 import java.util.Scanner;
 import java.util.regex.Pattern;
 
+import static com.diogonunes.jcolor.Attribute.*;
+
 public class Dice8EntropyGenerator {
 
+    public static final AnsiFormat GREEN_STYLE = new AnsiFormat(BLACK_TEXT(), BACK_COLOR(84), BOLD());
+    public static final AnsiFormat YELLOW_STYLE = new AnsiFormat(BLACK_TEXT(), BACK_COLOR(228), BOLD());
+    public static final AnsiFormat RED_STYLE = new AnsiFormat(BLACK_TEXT(), BACK_COLOR(213), BOLD());
+
     public static final int DICE_PER_ROLL = 11;
 
     private final int targetBitsOfEntropy;
     private final Scanner inputScanner;
+    private final boolean ansiColorOutput;
 
     private Entropy entropy = new Entropy();
 
-    public Dice8EntropyGenerator(int targetBitsOfEntropy, Scanner inputScanner) {
+    public Dice8EntropyGenerator(int targetBitsOfEntropy, Scanner inputScanner, boolean ansiColorOutput) {
 
         this.targetBitsOfEntropy = targetBitsOfEntropy;
         this.inputScanner = inputScanner;
+        this.ansiColorOutput = ansiColorOutput;
     }
 
     Entropy generate() {
@@ -81,18 +90,38 @@ public class Dice8EntropyGenerator {
             int entropyBitIndex = entropyBitString.length() - currentRollSetBitString.length() + rollSetBitIndex;
 
             if (entropyBitIndex < targetBitsOfEntropy)
-                rollSetBitsLine.append(currentRollSetBitString.charAt(rollSetBitIndex));
+                rollSetBitsLine.append(styleBit(rollSetBitIndex, "" + currentRollSetBitString.charAt(rollSetBitIndex)));
             else
                 rollSetBitsLine.append("-");
 
             if (rollSetBitIndex == 32) rollSetBitsLine.append("|");
-            else if (rollSetBitIndex % 3 == 2) rollSetBitsLine.append(" ");
+            else if (rollSetBitIndex % 3 == 2) rollSetBitsLine.append(styleBit(rollSetBitIndex, " "));
             else if (rollSetBitIndex % 11 == 10) rollSetBitsLine.append(" | ");
         }
 
         return rollSetBitsLine;
     }
 
+    private String styleBit(int rollSetBitIndex, String s) {
+
+        if (!ansiColorOutput) return s;
+
+        return getBitFormat(rollSetBitIndex).format(s);
+    }
+
+    private AnsiFormat getBitFormat(int rollSetBitIndex) {
+
+        int wordBitIndex = rollSetBitIndex % 11;
+
+        if (wordBitIndex == 0)
+            return GREEN_STYLE;
+
+        if (wordBitIndex <= 6)
+            return YELLOW_STYLE;
+
+        return RED_STYLE;
+    }
+
     private String getSeedWordsLine(int rollSet) {
 
         int baseIndex = rollSet * 3;

src/main/java/io/rudefox/burrow/MnemonicCommand.java

@@ -85,7 +85,7 @@ public class MnemonicCommand implements Runnable {
             return getDice6EntropyInteractive(diceEventBuffer);
 
         if (isDice8InteractiveMode())
-            return new Dice8EntropyGenerator(targetBitsOfEntropy, new Scanner(System.in)).generate();
+            return new Dice8EntropyGenerator(targetBitsOfEntropy, new Scanner(System.in), CommandLine.Help.Ansi.AUTO.enabled()).generate();
 
         diceEventBuffer.appendEvents(entropyOptions.eventMethod.getEventString);
         return diceEventBuffer.toEntropy();