[FIR IDE] Enabled usages services and added services stubs

idea/idea-fir/src/org/jetbrains/kotlin/idea/asJava/LightClassProviderFirImpl.kt

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2010-2020 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.idea.asJava
+
+import com.intellij.psi.*
+import org.jetbrains.kotlin.asJava.classes.KtLightClass
+import org.jetbrains.kotlin.psi.*
+
+class LightClassProviderFirImpl : LightClassProvider {
+    override fun getLightFieldForCompanionObject(companionObject: KtClassOrObject): PsiField? {
+        return null
+    }
+
+    override fun getLightClassMethods(function: KtFunction): List<PsiMethod> {
+        return emptyList()
+    }
+
+    override fun getLightClassParameterDeclarations(parameter: KtParameter): List<PsiNamedElement> {
+        return emptyList()
+    }
+
+    override fun getLightClassPropertyDeclarations(property: KtProperty): List<PsiNamedElement> {
+        return emptyList()
+    }
+
+    override fun toLightClassWithBuiltinMapping(classOrObject: KtClassOrObject): PsiClass? {
+        return null
+    }
+
+    override fun toLightMethods(psiElement: PsiElement): List<PsiMethod> {
+        return emptyList()
+    }
+
+    override fun toLightClass(classOrObject: KtClassOrObject): KtLightClass? {
+        return null
+    }
+
+    override fun toLightElements(ktElement: KtElement): List<PsiNamedElement> {
+        return emptyList()
+    }
+
+    override fun createKtFakeLightClass(kotlinOrigin: KtClassOrObject): PsiClass? {
+        return null
+    }
+
+    override fun getRepresentativeLightMethod(psiElement: PsiElement): PsiMethod? {
+        return null
+    }
+
+    override fun isKtFakeLightClass(psiClass: PsiClass): Boolean {
+        return false
+    }
+
+    override fun isKtLightClassForDecompiledDeclaration(psiClass: PsiClass): Boolean {
+        return false
+    }
+
+    override fun createKtFakeLightMethod(ktDeclaration: KtNamedDeclaration): PsiMethod? {
+        return null
+    }
+}

idea/idea-fir/src/org/jetbrains/kotlin/idea/findUsages/KotlinFindUsagesSupportFirImpl.kt

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2010-2020 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.idea.findUsages
+
+import com.intellij.openapi.project.Project
+import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiReference
+import com.intellij.psi.search.GlobalSearchScope
+import org.jetbrains.kotlin.psi.*
+
+class KotlinFindUsagesSupportFirImpl : KotlinFindUsagesSupport {
+    override fun isCallReceiverRefersToCompanionObject(element: KtElement, companionObject: KtObjectDeclaration): Boolean {
+        return false
+    }
+
+    override fun isDataClassComponentFunction(element: KtParameter): Boolean {
+        return false
+    }
+
+    override fun getTopMostOverriddenElementsToHighlight(target: PsiElement): List<PsiElement> {
+        return emptyList()
+    }
+
+    override fun tryRenderDeclarationCompactStyle(declaration: KtDeclaration): String? {
+        return (declaration as? KtNamedDeclaration)?.name ?: "SUPPORT FOR FIR"
+    }
+
+    override fun isConstructorUsage(psiReference: PsiReference, ktClassOrObject: KtClassOrObject): Boolean {
+        return false
+    }
+
+    override fun checkSuperMethods(declaration: KtDeclaration, ignore: Collection<PsiElement>?, actionString: String): List<PsiElement> {
+        return listOf(declaration)
+    }
+
+    override fun sourcesAndLibraries(delegate: GlobalSearchScope, project: Project): GlobalSearchScope {
+        return delegate
+    }
+}

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/asJava/LightClassProvider.kt

@@ -38,7 +38,7 @@ interface LightClassProvider {
 
     fun toLightElements(ktElement: KtElement): List<PsiNamedElement>
 
-    fun createKtFakeLightClass(kotlinOrigin: KtClassOrObject): PsiClass
+    fun createKtFakeLightClass(kotlinOrigin: KtClassOrObject): PsiClass?
 
     fun getRepresentativeLightMethod(psiElement: PsiElement): PsiMethod?
 

idea/resources-fir/META-INF/plugin.xml

@@ -97,6 +97,9 @@ The Kotlin FIR plugin provides language support in IntelliJ IDEA and Android Stu
     <projectService serviceImplementation="org.jetbrains.kotlin.idea.fir.low.level.api.FirIdeResolveStateService"/>
     <projectService serviceImplementation="org.jetbrains.kotlin.resolve.jvm.KotlinJavaPsiFacade"/>
 
+    <projectService serviceInterface="org.jetbrains.kotlin.idea.asJava.LightClassProvider"
+                    serviceImplementation="org.jetbrains.kotlin.idea.asJava.LightClassProviderFirImpl"/>
+
     <completion.contributor language="kotlin"
                             id="KotlinCompletionContributor"
                             order="first"
@@ -201,9 +204,28 @@ The Kotlin FIR plugin provides language support in IntelliJ IDEA and Android Stu
         order="first"/>
 
     <findUsagesHandlerFactory implementation="org.jetbrains.kotlin.idea.findUsages.KotlinFindUsagesHandlerFactory"/>
+    <projectService serviceInterface="org.jetbrains.kotlin.idea.findUsages.KotlinFindUsagesSupport"
+                    serviceImplementation="org.jetbrains.kotlin.idea.findUsages.KotlinFindUsagesSupportFirImpl"/>
 
     <lang.findUsagesProvider language="kotlin" implementationClass="org.jetbrains.kotlin.idea.findUsages.KotlinFindUsagesProviderBase"/>
 
+    <gotoDeclarationHandler implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinImportAliasGotoDeclarationHandler"/>
+    <referencesSearch implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinReferencesSearcher"/>
+    <referencesSearch implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinAliasedImportedElementSearcher"/>
+<!--    <directClassInheritorsSearch implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinDirectInheritorsSearcher"/>-->
+<!--    <overridingMethodsSearch implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinOverridingMethodsWithGenericsSearcher"/>-->
+<!--    <definitionsScopedSearch implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinDefinitionsSearcher"/>-->
+<!--    <annotatedElementsSearch implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinAnnotatedElementsSearcher"/>-->
+<!--    <classesWithAnnotatedMembersSearch implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinClassesWithAnnotatedMembersSearcher"/>-->
+<!--    <methodReferencesSearch implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinPropertyAccessorsReferenceSearcher"/>-->
+<!--    <methodReferencesSearch implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinConstructorDelegationCallReferenceSearcher"/>-->
+<!--    <methodReferencesSearch implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinOverridingMethodReferenceSearcher"/>-->
+<!--    <methodReferencesSearch implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinConventionMethodReferencesSearcher"/>-->
+<!--    <methodReferencesSearch implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.DefaultAnnotationMethodKotlinImplicitReferenceSearcher"/>-->
+
+    <readWriteAccessDetector implementation="org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinReadWriteAccessDetector" id="kotlin"/>
+
+
     <fileType name="Kotlin"
               implementationClass="org.jetbrains.kotlin.idea.KotlinFileType"
               fieldName="INSTANCE"

idea/src/org/jetbrains/kotlin/idea/asJava/LightClassProviderImpl.kt

@@ -38,7 +38,7 @@ class LightClassProviderImpl : LightClassProvider {
     override fun toLightElements(ktElement: KtElement): List<PsiNamedElement> =
         ktElement.toLightElements()
 
-    override fun createKtFakeLightClass(kotlinOrigin: KtClassOrObject): PsiClass =
+    override fun createKtFakeLightClass(kotlinOrigin: KtClassOrObject): PsiClass? =
         KtFakeLightClass(kotlinOrigin)
 
     override fun getRepresentativeLightMethod(psiElement: PsiElement): PsiMethod? =