[FIR] Refactor: extract resolved qualifier rendering out of FirRenderer

^KT-62585

compiler/fir/tree/src/org/jetbrains/kotlin/fir/renderer/FirRenderer.kt

@@ -46,7 +46,8 @@ class FirRenderer(
     override val valueParameterRenderer: FirValueParameterRenderer? = FirValueParameterRenderer(),
     override val errorExpressionRenderer: FirErrorExpressionRenderer? = FirErrorExpressionOnlyErrorRenderer(),
     override val fileAnnotationsContainerRenderer: FirFileAnnotationsContainerRenderer? = null,
-    override val resolvedNamedReferenceRenderer: FirResolvedNamedReferenceRenderer = FirResolvedNamedReferenceRendererWithLabel()
+    override val resolvedNamedReferenceRenderer: FirResolvedNamedReferenceRenderer = FirResolvedNamedReferenceRendererWithLabel(),
+    override val resolvedQualifierRenderer: FirResolvedQualifierRenderer = FirResolvedQualifierRendererWithLabel(),
 ) : FirRendererComponents {
 
     override val visitor = Visitor()
@@ -100,6 +101,7 @@ class FirRenderer(
         errorExpressionRenderer?.components = this
         fileAnnotationsContainerRenderer?.components = this
         resolvedNamedReferenceRenderer.components = this
+        resolvedQualifierRenderer.components = this
     }
 
     fun renderElementAsString(element: FirElement, trim: Boolean = false): String {
@@ -1137,18 +1139,7 @@ class FirRenderer(
         }
 
         override fun visitResolvedQualifier(resolvedQualifier: FirResolvedQualifier) {
-            annotationRenderer?.render(resolvedQualifier)
+            resolvedQualifierRenderer.render(resolvedQualifier)
-            print("Q|")
-            val classId = resolvedQualifier.classId
-            if (classId != null) {
-                idRenderer.renderClassId(classId)
-            } else {
-                print(resolvedQualifier.packageFqName.asString().replace(".", "/"))
-            }
-            if (resolvedQualifier.isNullableLHSForCallableReference) {
-                print("?")
-            }
-            print("|")
         }
 
         override fun visitBinaryLogicExpression(binaryLogicExpression: FirBinaryLogicExpression) {

compiler/fir/tree/src/org/jetbrains/kotlin/fir/renderer/FirRendererComponents.kt

@@ -27,4 +27,5 @@ internal interface FirRendererComponents {
     val errorExpressionRenderer: FirErrorExpressionRenderer?
     val fileAnnotationsContainerRenderer: FirFileAnnotationsContainerRenderer?
     val resolvedNamedReferenceRenderer: FirResolvedNamedReferenceRenderer
+    val resolvedQualifierRenderer: FirResolvedQualifierRenderer
 }

compiler/fir/tree/src/org/jetbrains/kotlin/fir/renderer/FirResolvedQualifierRenderer.kt

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.fir.renderer
+
+import org.jetbrains.kotlin.fir.expressions.FirResolvedQualifier
+
+open class FirResolvedQualifierRenderer {
+
+    internal lateinit var components: FirRendererComponents
+
+    protected val printer: FirPrinter get() = components.printer
+
+    internal fun render(resolvedQualifier: FirResolvedQualifier) {
+        components.annotationRenderer?.render(resolvedQualifier)
+        renderResolvedQualifierWithoutAnnotations(resolvedQualifier)
+    }
+
+    protected open fun renderResolvedQualifierWithoutAnnotations(resolvedQualifier: FirResolvedQualifier) {
+        val classId = resolvedQualifier.classId
+        if (classId != null) {
+            components.idRenderer.renderClassId(classId)
+        } else {
+            printer.print(resolvedQualifier.packageFqName.asString().replace(".", "/"))
+        }
+        if (resolvedQualifier.isNullableLHSForCallableReference) {
+            printer.print("?")
+        }
+    }
+}
+
+class FirResolvedQualifierRendererWithLabel : FirResolvedQualifierRenderer() {
+    override fun renderResolvedQualifierWithoutAnnotations(resolvedQualifier: FirResolvedQualifier) {
+        printer.print("Q|")
+        super.renderResolvedQualifierWithoutAnnotations(resolvedQualifier)
+        printer.print("|")
+    }
+}