Add quickfix for "A type annotation is required on a value parameter" #KT-12804 Fixed

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

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.idea.quickfix
+
+import com.intellij.openapi.editor.Editor
+import com.intellij.openapi.project.Project
+import com.intellij.psi.PsiFile
+import org.jetbrains.kotlin.diagnostics.Diagnostic
+import org.jetbrains.kotlin.diagnostics.Errors
+import org.jetbrains.kotlin.idea.caches.resolve.analyze
+import org.jetbrains.kotlin.idea.core.ShortenReferences
+import org.jetbrains.kotlin.idea.util.IdeDescriptorRenderers
+import org.jetbrains.kotlin.psi.KtFile
+import org.jetbrains.kotlin.psi.KtParameter
+import org.jetbrains.kotlin.psi.KtPsiFactory
+import org.jetbrains.kotlin.resolve.calls.callUtil.getType
+import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
+
+class AddTypeAnnotationToValueParameterFix(element: KtParameter) : KotlinQuickFixAction<KtParameter>(element) {
+
+    val typeNameShort : String?
+    val typeName: String?
+
+    init {
+        val defaultValue = element.defaultValue
+        val type = defaultValue?.getType(defaultValue.analyze(BodyResolveMode.PARTIAL))
+
+        typeNameShort = type?.let { IdeDescriptorRenderers.SOURCE_CODE_SHORT_NAMES_IN_TYPES.renderType(it) }
+        typeName = type?.let { IdeDescriptorRenderers.SOURCE_CODE.renderType(it) }
+    }
+
+    override fun isAvailable(project: Project, editor: Editor?, file: PsiFile): Boolean {
+        return element.typeReference == null && typeNameShort != null
+    }
+
+    override fun getFamilyName() = "Add type annotation"
+    override fun getText() = "Add type '$typeNameShort' to parameter '${element.name}'"
+
+    override fun invoke(project: Project, editor: Editor?, file: KtFile) {
+        if (typeName != null) {
+            element.typeReference = KtPsiFactory(element).createType(typeName)
+            ShortenReferences.DEFAULT.process(element)
+        }
+    }
+
+    companion object Factory : KotlinSingleIntentionActionFactory() {
+        override fun createAction(diagnostic: Diagnostic): AddTypeAnnotationToValueParameterFix? {
+            val element = Errors.VALUE_PARAMETER_WITH_NO_TYPE_ANNOTATION.cast(diagnostic).psiElement
+            if (element.defaultValue == null) return null
+            return AddTypeAnnotationToValueParameterFix(element)
+        }
+    }
+}

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

@@ -404,5 +404,7 @@ class QuickFixRegistrar : QuickFixContributor {
         WRONG_LONG_SUFFIX.registerFactory(WrongLongSuffixFix)
 
         REIFIED_TYPE_PARAMETER_NO_INLINE.registerFactory(AddInlineToFunctionWithReifiedFix)
+
+        VALUE_PARAMETER_WITH_NO_TYPE_ANNOTATION.registerFactory(AddTypeAnnotationToValueParameterFix)
     }
 }