Expose method to compute an effective PreferredThemeStyle adhering to the current ThemeSettings

core/src/main/java/com/github/weisj/darklaf/settings/SettingsConfiguration.java

@@ -73,6 +73,16 @@ public class SettingsConfiguration implements Serializable {
         return baseTheme.derive(fontSizeRule, getFontPrototype(), accentColorRule);
     }
 
+    public final PreferredThemeStyle getEffectiveThemeStyle(final PreferredThemeStyle themeStyle) {
+        Theme baseTheme = getEffectiveBaseTheme(themeStyle);
+
+        FontSizeRule fontSizeRule = getEffectiveFontSizeRule(themeStyle);
+        AccentColorRule accentColorRule = getEffectiveAccentColorRule(baseTheme, themeStyle);
+
+        return new PreferredThemeStyle(themeStyle.getContrastRule(), themeStyle.getColorToneRule(),
+                accentColorRule, fontSizeRule);
+    }
+
     private AccentColorRule getEffectiveAccentColorRule(final Theme baseTheme,
             final PreferredThemeStyle preferredThemeStyle) {
         AccentColorRule accentColorRule = getAccentColorRule();
@@ -81,10 +91,10 @@ public class SettingsConfiguration implements Serializable {
         AccentColorRule systemAccentColorRule = preferredThemeStyle.getAccentColorRule();
         Color accentColor = accentColorRule.getAccentColor();
         Color selectionColor = accentColorRule.getSelectionColor();
-        if (isAccentColorFollowsSystem() && baseTheme.supportsCustomAccentColor()) {
+        if (isAccentColorFollowsSystem() && (baseTheme == null || baseTheme.supportsCustomAccentColor())) {
             accentColor = systemAccentColorRule.getAccentColor();
         }
-        if (isSelectionColorFollowsSystem() && baseTheme.supportsCustomSelectionColor()) {
+        if (isSelectionColorFollowsSystem() && (baseTheme == null || baseTheme.supportsCustomSelectionColor())) {
             selectionColor = systemAccentColorRule.getSelectionColor();
         }
 

core/src/main/java/com/github/weisj/darklaf/settings/ThemeSettings.java

@@ -38,6 +38,7 @@ import com.github.weisj.darklaf.theme.event.ThemePreferenceListener;
 import com.github.weisj.darklaf.theme.spec.AccentColorRule;
 import com.github.weisj.darklaf.theme.spec.FontPrototype;
 import com.github.weisj.darklaf.theme.spec.FontSizeRule;
+import com.github.weisj.darklaf.theme.spec.PreferredThemeStyle;
 import com.github.weisj.darklaf.ui.util.DarkUIUtil;
 import com.github.weisj.darklaf.ui.util.UIThread;
 import com.github.weisj.darklaf.util.LazyValue;
@@ -496,6 +497,16 @@ public class ThemeSettings implements ThemePreferenceListener {
         applyTheme(currentConfiguration.getEffectiveTheme());
     }
 
+    /**
+     * Compute the effective preferred theme style adhering to the current ThemeSettings
+     *
+     * @param style the preferred theme style prototype
+     * @return the effective preferred theme style
+     */
+    public PreferredThemeStyle computeEffectiveStyle(final PreferredThemeStyle style) {
+        return currentConfiguration.getEffectiveThemeStyle(style);
+    }
+
     /**
      * Revert the settings to the last time they have been saved.
      *