[kotlin] workaround for function presentation with functional types

^KTIJ-31321 fixed

GitOrigin-RevId: fb9e09070ca7e8f89f498fe4a883f6c2f3d89561

plugins/kotlin/base/analysis/src/org/jetbrains/kotlin/idea/presentation/DeclarationPresenters.kt

@@ -91,21 +91,33 @@ open class KotlinFunctionPresentation(
 ) : KotlinDefaultNamedDeclarationPresentation(function) {
     override fun getPresentableText(): String {
         return buildString {
-            function.receiverTypeReference?.getTypeText()?.let {
-                append(StringUtil.getShortName(it))
-                append(".")
+            val receiverTypeText = getTrimmedTypeText(function.receiverTypeReference)
+            if (receiverTypeText.isNotEmpty()) {
+                append("$receiverTypeText.")
             }
 
             name?.let { append(it) }
 
             append("(")
             append(function.valueParameters.joinToString {
-                (if (it.isVarArg) "vararg " else "") + StringUtil.getShortName(it.typeReference?.getTypeText() ?: "")
+                val typeReference = it.typeReference
+                (if (it.isVarArg) "vararg " else "") + getTrimmedTypeText(typeReference)
             })
             append(")")
         }
     }
 
+    private fun getTrimmedTypeText(typeReference: KtTypeReference?): String {
+        val typeText = when (typeReference?.typeElement) {
+            null -> ""
+            is KtFunctionType -> typeReference.getTypeText()
+            else -> {
+                StringUtil.getShortName(typeReference.getTypeText())
+            }
+        }
+        return typeText
+    }
+
     override fun getLocationString(): String? {
         if (function is KtConstructor<*>) {
             val name = function.getContainingClassOrObject().fqName ?: return null

plugins/kotlin/fir/tests/test/org/jetbrains/kotlin/idea/fir/resolve/KotlinPresentationTest.kt

@@ -0,0 +1,18 @@
+// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package org.jetbrains.kotlin.idea.fir.resolve
+
+import org.jetbrains.kotlin.idea.base.plugin.KotlinPluginMode
+import org.jetbrains.kotlin.idea.test.KotlinLightCodeInsightFixtureTestCase
+import org.jetbrains.kotlin.psi.KtFile
+import org.jetbrains.kotlin.psi.KtFunction
+import org.junit.Assert
+
+class KotlinPresentationTest: KotlinLightCodeInsightFixtureTestCase() {
+    override val pluginMode: KotlinPluginMode = KotlinPluginMode.K2
+    fun testFunctionPresentation() {
+        val file = myFixture.configureByText("a.kt", "fun <T> (() -> kotlin.Boolean).foo(p: T.() -> kotlin.Boolean) {}") as KtFile
+        val function = file.declarations[0] as KtFunction
+        val presentableText = function.presentation!!.presentableText
+        Assert.assertEquals("(() -> kotlin.Boolean).foo(T.() -> kotlin.Boolean)", presentableText)
+    }
+}