Migrate to FlatLaf

Fixes #355.
- Replaces the Darcula look and feel with FlatLaf Darcula,
  which does not have the same rendering bugs with CJK
  characters (at least on Windows 10).
- Replaces Metal with FlatLaf Light as the default
  look and feel. Metal is provided as a new, separate
  theme option.

4 files changed, 11 insertions, 5 deletions

diff --git a/README.md b/README.md
index fac036f..f3ab4c7 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ Enigma includes the following open-source libraries:
  - A [modified version](https://github.com/FabricMC/cfr) of [CFR](https://github.com/leibnitz27/cfr) (MIT)
  - [Guava](https://github.com/google/guava) (Apache-2.0)
  - [SyntaxPane](https://github.com/Sciss/SyntaxPane) (Apache-2.0)
- - [Darcula](https://github.com/bulenkov/Darcula) (Apache-2.0)
+ - [FlatLaf](https://github.com/JFormDesigner/FlatLaf) (Apache-2.0)
  - [jopt-simple](https://github.com/jopt-simple/jopt-simple) (MIT)
  - [ASM](https://asm.ow2.io/) (BSD-3-Clause)
 
diff --git a/enigma-swing/build.gradle b/enigma-swing/build.gradle
index 2966ae7..e0f6f66 100644
--- a/enigma-swing/build.gradle
+++ b/enigma-swing/build.gradle
@@ -8,7 +8,7 @@ dependencies {
     implementation project(':enigma-server')
 
     implementation 'net.sf.jopt-simple:jopt-simple:6.0-alpha-3'
-    implementation 'com.bulenkov:darcula:1.0.0-bobbylight'
+    implementation 'com.formdev:flatlaf:1.0'
     implementation 'de.sciss:syntaxpane:1.2.0'
     implementation 'com.github.lukeu:swing-dpi:0.6'
     implementation 'org.drjekyll:fontchooser:2.4'
diff --git a/enigma-swing/src/main/java/cuchaz/enigma/gui/config/LookAndFeel.java b/enigma-swing/src/main/java/cuchaz/enigma/gui/config/LookAndFeel.java
index 1c70d43..d1d3e0d 100644
--- a/enigma-swing/src/main/java/cuchaz/enigma/gui/config/LookAndFeel.java
+++ b/enigma-swing/src/main/java/cuchaz/enigma/gui/config/LookAndFeel.java
@@ -8,16 +8,18 @@ import javax.swing.JPanel;
 import javax.swing.UIManager;
 import javax.swing.plaf.metal.MetalLookAndFeel;
 
-import com.bulenkov.darcula.DarculaLaf;
+import com.formdev.flatlaf.FlatDarculaLaf;
+import com.formdev.flatlaf.FlatLightLaf;
 
 public enum LookAndFeel {
         DEFAULT("Default"),
         DARCULA("Darcula"),
+        METAL("Metal"),
         SYSTEM("System"),
         NONE("None (JVM default)");
 
         // the "JVM default" look and feel, get it at the beginning and store it so we can set it later
-        private static javax.swing.LookAndFeel NONE_LAF = UIManager.getLookAndFeel();
+        private static final javax.swing.LookAndFeel NONE_LAF = UIManager.getLookAndFeel();
         private final String name;
 
         LookAndFeel(String name) {
@@ -35,10 +37,13 @@ public enum LookAndFeel {
                                         UIManager.setLookAndFeel(NONE_LAF);
                                         break;
                                 case DEFAULT:
+                                        UIManager.setLookAndFeel(new FlatLightLaf());
+                                        break;
+                                case METAL:
                                         UIManager.setLookAndFeel(new MetalLookAndFeel());
                                         break;
                                 case DARCULA:
-                                        UIManager.setLookAndFeel(new DarculaLaf());
+                                        UIManager.setLookAndFeel(new FlatDarculaLaf());
                                         break;
                                 case SYSTEM:
                                         UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
diff --git a/enigma/src/main/resources/lang/en_us.json b/enigma/src/main/resources/lang/en_us.json
index 8195bb1..8862f22 100644
--- a/enigma/src/main/resources/lang/en_us.json
+++ b/enigma/src/main/resources/lang/en_us.json
@@ -36,6 +36,7 @@
         "menu.view.themes": "Themes",
         "menu.view.themes.default": "Default",
         "menu.view.themes.darcula": "Darcula",
+        "menu.view.themes.metal": "Metal",
         "menu.view.themes.system": "System",
         "menu.view.themes.none": "None (JVM Default)",
         "menu.view.languages": "Languages",