Not holding descriptor in SuperClassNotInitialized.AddParametersFix

idea/src/org/jetbrains/kotlin/idea/quickfix/SuperClassNotInitialized.kt

@@ -22,7 +22,6 @@ import com.intellij.codeInsight.intention.IntentionAction
 import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.project.Project
-import com.intellij.psi.PsiFile
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.ConstructorDescriptor
 import org.jetbrains.kotlin.descriptors.ValueParameterDescriptor
@@ -38,10 +37,12 @@ import org.jetbrains.kotlin.idea.util.ShortenReferences
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.endOffset
 import org.jetbrains.kotlin.renderer.DescriptorRenderer
+import org.jetbrains.kotlin.renderer.render
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.types.IndexedParametersSubstitution
 import org.jetbrains.kotlin.types.JetType
 import org.jetbrains.kotlin.types.typeUtil.isSubtypeOf
+import org.jetbrains.kotlin.utils.addIfNotNull
 import java.util.*
 
 public object SuperClassNotInitialized : JetIntentionActionsFactory() {
@@ -92,7 +93,7 @@ public object SuperClassNotInitialized : JetIntentionActionsFactory() {
                         val typesRendered = types.take(maxParamsToDisplay).map { DescriptorRenderer.SHORT_NAMES_IN_TYPES.renderType(it) }
                         val parameterString = typesRendered.joinToString(", ", "(", if (types.size() <= maxParamsToDisplay) ")" else ",...)")
                         val text = "Add constructor parameters from " + superClass.getName().asString() + parameterString
-                        fixes.add(AddParametersFix(delegator, classOrObjectDeclaration, constructor, text))
+                        fixes.addIfNotNull(AddParametersFix.create(delegator, classOrObjectDeclaration, constructor, text))
                     }
                 }
             }
@@ -127,56 +128,70 @@ public object SuperClassNotInitialized : JetIntentionActionsFactory() {
 
     private class AddParametersFix(
             element: JetDelegatorToSuperClass,
-            val classDeclaration: JetClass,
+            private val classDeclaration: JetClass,
-            val superConstructor: ConstructorDescriptor, //TODO: do not hold descriptor!
+            private val parametersToAdd: Collection<JetParameter>,
+            private val argumentText: String,
             private val text: String
     ) : KotlinQuickFixAction<JetDelegatorToSuperClass>(element) {
 
-        override fun getFamilyName() = "Add constructor parameters from superclass"
+        companion object {
+            fun create(
+                    element: JetDelegatorToSuperClass,
+                    classDeclaration: JetClass,
+                    superConstructor: ConstructorDescriptor,
+                    text: String
+            ): AddParametersFix? {
+                val superParameters = superConstructor.getValueParameters()
+                assert(superParameters.isNotEmpty())
 
-        override fun isAvailable(project: Project, editor: Editor?, file: PsiFile): Boolean {
+                if (superParameters.any { it.type.isError }) return null
-            return super.isAvailable(project, editor, file) && superConstructor.getValueParameters().none { it.getType().isError() }
+
+                val argumentText = StringBuilder()
+                val oldParameters = classDeclaration.getPrimaryConstructorParameters()
+                val parametersToAdd = ArrayList<JetParameter>()
+                for (parameter in superParameters) {
+                    val nameRendered = parameter.name.render()
+                    val varargElementType = parameter.varargElementType
+
+                    if (argumentText.length > 0) {
+                        argumentText.append(", ")
+                    }
+                    argumentText.append(if (varargElementType != null) "*$nameRendered" else nameRendered)
+
+                    val nameString = parameter.getName().asString()
+                    val existingParameter = oldParameters.firstOrNull { it.getName() == nameString }
+                    if (existingParameter != null) {
+                        val type = (existingParameter.resolveToDescriptor() as ValueParameterDescriptor).getType()
+                        if (type.isSubtypeOf(parameter.getType())) continue // use existing parameter
+                    }
+
+                    val parameterText = if (varargElementType != null)
+                        "vararg " + nameRendered + ":" + IdeDescriptorRenderers.SOURCE_CODE.renderType(varargElementType)
+                    else
+                        nameRendered + ":" + IdeDescriptorRenderers.SOURCE_CODE.renderType(parameter.type)
+                    parametersToAdd.add(JetPsiFactory(element).createParameter(parameterText))
+                }
+
+                return AddParametersFix(element, classDeclaration, parametersToAdd, argumentText.toString(), text)
+            }
         }
 
-        override fun getText()= text
+        override fun getFamilyName() = "Add constructor parameters from superclass"
+
+        override fun getText() = text
 
         override fun invoke(project: Project, editor: Editor?, file: JetFile) {
             val factory = JetPsiFactory(project)
-            val renderer = IdeDescriptorRenderers.SOURCE_CODE
 
-            val superParameters = superConstructor.getValueParameters()
-            assert(superParameters.isNotEmpty())
-            val parameterNames = ArrayList<String>()
             val typeRefsToShorten = ArrayList<JetTypeReference>()
             val parameterList = classDeclaration.createPrimaryConstructorParameterListIfAbsent()
-            val oldParameters = parameterList.getParameters()
-            val parametersToAdd = ArrayList<JetParameter>()
-            for (parameter in superParameters) {
-                val name = renderer.renderName(parameter.getName())
-                val varargElementType = parameter.getVarargElementType()
-
-                parameterNames.add(if (varargElementType != null) "*$name" else name)
-
-                val nameString = parameter.getName().asString()
-                val existingParameter = oldParameters.firstOrNull { it.getName() == nameString }
-                if (existingParameter != null) {
-                    val type = (existingParameter.resolveToDescriptor() as ValueParameterDescriptor).getType()
-                    if (type.isSubtypeOf(parameter.getType())) continue // use existing parameter
-                }
-
-                val parameterText = if (varargElementType != null)
-                    "vararg " + name + ":" + renderer.renderType(varargElementType)
-                else
-                    name + ":" + renderer.renderType(parameter.getType())
-                parametersToAdd.add(factory.createParameter(parameterText))
-            }
 
             for (parameter in parametersToAdd) {
                 val newParameter = parameterList.addParameter(parameter)
-                typeRefsToShorten.add(newParameter.getTypeReference()!!)
+                typeRefsToShorten.add(newParameter.typeReference!!)
             }
 
-            val delegatorCall = factory.createDelegatorToSuperCall(element.getText() + "(" + parameterNames.joinToString(",") + ")")
+            val delegatorCall = factory.createDelegatorToSuperCall(element.text + "(" + argumentText + ")")
             element.replace(delegatorCall)
 
             ShortenReferences.DEFAULT.process(typeRefsToShorten)