Styling: fixed resolving of UI variables in styles that use other variables

CHANGELOG.md

@@ -5,8 +5,8 @@ FlatLaf Change Log
 
 #### New features and improvements
 
-- Fonts: Added **Roboto
-  Mono** (https://fonts.google.com/specimen/Roboto+Mono). (PR #639, issue #638)
+- Fonts: Added **Roboto Mono** (https://fonts.google.com/specimen/Roboto+Mono).
+  (PR #639, issue #638)
 
 #### Fixed bugs
 
@@ -20,6 +20,7 @@ FlatLaf Change Log
     #628)
   - Avoid that accent color affect some colors in some IntelliJ themes. (issue
     #625)
+- Styling: Fixed resolving of UI variables in styles that use other variables.
 
 
 ## 3.0

flatlaf-core/src/main/java/com/formdev/flatlaf/UIDefaultsLoader.java

@@ -334,7 +334,7 @@ class UIDefaultsLoader
 			if( newValue == null )
 				throw new IllegalArgumentException( "variable '" + value + "' not found" );
 
-			return newValue;
+			return resolveValueFromUIManager( newValue );
 		}
 
 		if( !value.startsWith( PROPERTY_PREFIX ) )

flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyling.java

@@ -29,6 +29,7 @@ import javax.swing.table.JTableHeader;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
+import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.icons.*;
 import com.formdev.flatlaf.util.ColorFunctions;
 
@@ -39,12 +40,20 @@ public class TestFlatStyling
 {
 	@BeforeAll
 	static void setup() {
+		HashMap<String, String> globalExtraDefaults = new HashMap<>();
+		globalExtraDefaults.put( "@var1", "#f00" );
+		globalExtraDefaults.put( "@var2", "@var1" );
+		globalExtraDefaults.put( "var2Resolved", "@var2" );
+		FlatLaf.setGlobalExtraDefaults( globalExtraDefaults );
+
 		TestUtils.setup( false );
 	}
 
 	@AfterAll
 	static void cleanup() {
 		TestUtils.cleanup();
+
+		FlatLaf.setGlobalExtraDefaults( null );
 	}
 
 	@Test
@@ -171,6 +180,13 @@ public class TestFlatStyling
 			"saturate(darken(@background,20%),10%)" );
 	}
 
+	@Test
+	void parseRecursiveVariables() {
+		Color background = UIManager.getColor( "var2Resolved" );
+
+		testColorStyle( background.getRGB(), "@var2" );
+	}
+
 	private void testColorStyle( int expectedRGB, String style ) {
 		testStyle( "background", new Color( expectedRGB, (expectedRGB & 0xff000000) != 0 ), style );
 	}