Display values of java constants (#2609)

Fixes #2524

1 files changed, 17 insertions, 0 deletions

diff --git a/plugins/base/src/main/kotlin/translators/psi/DefaultPsiToDocumentableTranslator.kt b/plugins/base/src/main/kotlin/translators/psi/DefaultPsiToDocumentableTranslator.kt
index 03e0b9ef..a58e1b83 100644
--- a/plugins/base/src/main/kotlin/translators/psi/DefaultPsiToDocumentableTranslator.kt
+++ b/plugins/base/src/main/kotlin/translators/psi/DefaultPsiToDocumentableTranslator.kt
@@ -658,6 +658,7 @@ class DefaultPsiToDocumentableTranslator(
                         inheritedFrom?.let { inheritedFrom -> InheritedMember(inheritedFrom.toSourceSetDependent()) },
                         it.toSourceSetDependent().toAdditionalModifiers(),
                         annotations.toSourceSetDependent().toAnnotations(),
+                        psi.getConstantExpression()?.let { DefaultValue(it.toSourceSetDependent()) },
                         takeIf { isVar }?.let { IsVar }
                     )
                 }
@@ -671,6 +672,22 @@ class DefaultPsiToDocumentableTranslator(
         private fun Collection<PsiAnnotation>.toListOfAnnotations() =
             filter { it !is KtLightAbstractAnnotation }.mapNotNull { it.toAnnotation() }
 
+        private fun PsiField.getConstantExpression(): Expression? {
+            val constantValue = this.computeConstantValue() ?: return null
+            return when (constantValue) {
+                is Byte -> IntegerConstant(constantValue.toLong())
+                is Short -> IntegerConstant(constantValue.toLong())
+                is Int -> IntegerConstant(constantValue.toLong())
+                is Long -> IntegerConstant(constantValue)
+                is Char -> StringConstant(constantValue.toString())
+                is String -> StringConstant(constantValue)
+                is Double -> DoubleConstant(constantValue)
+                is Float -> FloatConstant(constantValue)
+                is Boolean -> BooleanConstant(constantValue)
+                else -> ComplexExpression(constantValue.toString())
+            }
+        }
+
         private fun JvmAnnotationAttribute.toValue(): AnnotationParameterValue = when (this) {
             is PsiNameValuePair -> value?.toValue() ?: attributeValue?.toValue() ?: StringValue("")
             else -> StringValue(this.attributeName)