Add quickfix for DECLARATION_CANT_BE_INLINED #KT-9983 Fixed

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

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. 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.idea.quickfix
+
+import com.intellij.codeInsight.intention.IntentionAction
+import com.intellij.openapi.editor.Editor
+import com.intellij.openapi.project.Project
+import org.jetbrains.kotlin.diagnostics.Diagnostic
+import org.jetbrains.kotlin.idea.intentions.declarations.ConvertMemberToExtensionIntention
+import org.jetbrains.kotlin.lexer.KtTokens
+import org.jetbrains.kotlin.psi.KtFile
+import org.jetbrains.kotlin.psi.KtNamedFunction
+import org.jetbrains.kotlin.psi.psiUtil.containingClass
+
+object DeclarationCantBeInlinedFactory : KotlinIntentionActionsFactory() {
+    override fun doCreateActions(diagnostic: Diagnostic): List<IntentionAction> {
+        val function = diagnostic.psiElement as? KtNamedFunction ?: return emptyList()
+        val containingClass = function.containingClass() ?: return emptyList()
+        val fixes = mutableListOf<IntentionAction>()
+        if (containingClass.isInterface()) {
+            fixes.add(ConvertMemberToExtensionFix(function))
+        } else if (function.hasModifier(KtTokens.OPEN_KEYWORD)) {
+            fixes.add(RemoveModifierFix(function, KtTokens.OPEN_KEYWORD, false))
+        }
+        return fixes
+    }
+}
+
+private class ConvertMemberToExtensionFix(element: KtNamedFunction) : KotlinQuickFixAction<KtNamedFunction>(element) {
+    override fun getText() = "Convert member to extension"
+
+    override fun getFamilyName() = text
+
+    override fun invoke(project: Project, editor: Editor?, file: KtFile) {
+        element?.also { ConvertMemberToExtensionIntention.convert(it) }
+    }
+}

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

@@ -576,5 +576,7 @@ class QuickFixRegistrar : QuickFixContributor {
         RESOLUTION_TO_CLASSIFIER.registerFactory(ConvertToAnonymousObjectFix)
 
         NOTHING_TO_INLINE.registerFactory(RemoveModifierFix.createRemoveModifierFactory(isRedundant = false))
+
+        DECLARATION_CANT_BE_INLINED.registerFactory(DeclarationCantBeInlinedFactory)
     }
 }