Clean up of plugin-common.xml and convert components to services

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/PerModulePackageCacheService.kt

@@ -16,6 +16,7 @@ import com.intellij.openapi.project.Project
 import com.intellij.openapi.project.rootManager
 import com.intellij.openapi.roots.ModuleRootEvent
 import com.intellij.openapi.roots.ModuleRootListener
+import com.intellij.openapi.startup.StartupActivity
 import com.intellij.openapi.util.Key
 import com.intellij.openapi.vfs.VfsUtilCore
 import com.intellij.openapi.vfs.VirtualFile
@@ -47,14 +48,14 @@ import org.jetbrains.kotlin.psi.psiUtil.getParentOfType
 import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.ConcurrentMap
 
-class KotlinPackageContentModificationListener(private val project: Project) : Disposable {
-    val connection = project.messageBus.connect()
+class KotlinPackageContentModificationListener : StartupActivity {
 
     companion object {
         val LOG = Logger.getInstance(this::class.java)
     }
 
-    init {
+    override fun runActivity(project: Project) {
+        val connection = project.messageBus.connect(project)
         connection.subscribe(VirtualFileManager.VFS_CHANGES, object : BulkFileListener {
             override fun before(events: MutableList<out VFileEvent>) = onEvents(events, false)
             override fun after(events: List<VFileEvent>) = onEvents(events, true)
@@ -116,9 +117,6 @@ class KotlinPackageContentModificationListener(private val project: Project) : D
         })
     }
 
-    override fun dispose() {
-        connection.disconnect()
-    }
 }
 
 class KotlinPackageStatementPsiTreeChangePreprocessor(private val project: Project) : PsiTreeChangePreprocessor {

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/PerModulePackageCacheService.kt.192

@@ -0,0 +1,420 @@
+/*
+ * Copyright 2000-2019 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.caches
+
+import com.intellij.ProjectTopics
+import com.intellij.openapi.Disposable
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.components.ServiceManager
+import com.intellij.openapi.diagnostic.Logger
+import com.intellij.openapi.module.Module
+import com.intellij.openapi.progress.ProcessCanceledException
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.project.rootManager
+import com.intellij.openapi.roots.ModuleRootEvent
+import com.intellij.openapi.roots.ModuleRootListener
+import com.intellij.openapi.util.Key
+import com.intellij.openapi.vfs.VfsUtilCore
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.openapi.vfs.VirtualFileManager
+import com.intellij.openapi.vfs.newvfs.BulkFileListener
+import com.intellij.openapi.vfs.newvfs.events.*
+import com.intellij.psi.PsiFile
+import com.intellij.psi.PsiManager
+import com.intellij.psi.impl.PsiManagerEx
+import com.intellij.psi.impl.PsiTreeChangeEventImpl
+import com.intellij.psi.impl.PsiTreeChangePreprocessor
+import com.intellij.psi.search.GlobalSearchScope
+import com.intellij.util.containers.ContainerUtil
+import org.jetbrains.kotlin.idea.KotlinFileType
+import org.jetbrains.kotlin.idea.caches.PerModulePackageCacheService.Companion.DEBUG_LOG_ENABLE_PerModulePackageCache
+import org.jetbrains.kotlin.idea.caches.PerModulePackageCacheService.Companion.FULL_DROP_THRESHOLD
+import org.jetbrains.kotlin.idea.caches.project.ModuleSourceInfo
+import org.jetbrains.kotlin.idea.caches.project.getModuleInfoByVirtualFile
+import org.jetbrains.kotlin.idea.caches.project.getNullableModuleInfo
+import org.jetbrains.kotlin.idea.stubindex.PackageIndexUtil
+import org.jetbrains.kotlin.idea.util.getSourceRoot
+import org.jetbrains.kotlin.idea.util.sourceRoot
+import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.psi.KtFile
+import org.jetbrains.kotlin.psi.KtPackageDirective
+import org.jetbrains.kotlin.psi.NotNullableUserDataProperty
+import org.jetbrains.kotlin.psi.psiUtil.getChildrenOfType
+import org.jetbrains.kotlin.psi.psiUtil.getParentOfType
+import java.util.concurrent.ConcurrentHashMap
+import java.util.concurrent.ConcurrentMap
+
+class KotlinPackageContentModificationListener(private val project: Project) : Disposable {
+    val connection = project.messageBus.connect()
+
+    companion object {
+        val LOG = Logger.getInstance(this::class.java)
+    }
+
+    init {
+        connection.subscribe(VirtualFileManager.VFS_CHANGES, object : BulkFileListener {
+            override fun before(events: MutableList<out VFileEvent>) = onEvents(events, false)
+            override fun after(events: List<VFileEvent>) = onEvents(events, true)
+
+            private fun isRelevant(event: VFileEvent): Boolean = when (event) {
+                is VFilePropertyChangeEvent -> false
+                is VFileCreateEvent -> true
+                is VFileMoveEvent -> true
+                is VFileDeleteEvent -> true
+                is VFileContentChangeEvent -> true
+                is VFileCopyEvent -> true
+                else -> {
+                    LOG.warn("Unknown vfs event: ${event.javaClass}")
+                    false
+                }
+            }
+
+            fun onEvents(events: List<VFileEvent>, isAfter: Boolean) {
+                val service = PerModulePackageCacheService.getInstance(project)
+                val fileManager = PsiManagerEx.getInstanceEx(project).fileManager
+                if (events.size >= FULL_DROP_THRESHOLD) {
+                    service.onTooComplexChange()
+                } else {
+                    events.asSequence()
+                        .filter(::isRelevant)
+                        .filter {
+                            (it.isValid || it !is VFileCreateEvent) && it.file != null
+                        }
+                        .filter {
+                            val vFile = it.file!!
+                            vFile.isDirectory || vFile.fileType == KotlinFileType.INSTANCE
+                        }
+                        .filter {
+                            // It expected that content change events will be duplicated with more precise PSI events and processed
+                            // in KotlinPackageStatementPsiTreeChangePreprocessor, but events might have been missing if PSI view provider
+                            // is absent.
+                            if (it is VFileContentChangeEvent) {
+                                isAfter && fileManager.findCachedViewProvider(it.file) == null
+                            } else {
+                                true
+                            }
+                        }
+                        .filter {
+                            when (val origin = it.requestor) {
+                                is Project -> origin == project
+                                is PsiManager -> origin.project == project
+                                else -> true
+                            }
+                        }
+                        .forEach { event -> service.notifyPackageChange(event) }
+                }
+            }
+        })
+
+        connection.subscribe(ProjectTopics.PROJECT_ROOTS, object : ModuleRootListener {
+            override fun rootsChanged(event: ModuleRootEvent) {
+                PerModulePackageCacheService.getInstance(project).onTooComplexChange()
+            }
+        })
+    }
+
+    override fun dispose() {
+        connection.disconnect()
+    }
+}
+
+class KotlinPackageStatementPsiTreeChangePreprocessor(private val project: Project) : PsiTreeChangePreprocessor {
+    override fun treeChanged(event: PsiTreeChangeEventImpl) {
+        val eFile = event.file ?: event.child as? PsiFile
+        if (eFile == null) {
+            LOG.debugIfEnabled(project, true) { "Got PsiEvent: $event without file" }
+        }
+        val file = eFile as? KtFile ?: return
+
+        when (event.code) {
+            PsiTreeChangeEventImpl.PsiEventType.CHILD_ADDED,
+            PsiTreeChangeEventImpl.PsiEventType.CHILD_MOVED,
+            PsiTreeChangeEventImpl.PsiEventType.CHILD_REPLACED,
+            PsiTreeChangeEventImpl.PsiEventType.CHILD_REMOVED -> {
+                val child = event.child ?: run {
+                    LOG.debugIfEnabled(project, true) { "Got PsiEvent: $event without child" }
+                    return
+                }
+                if (child.getParentOfType<KtPackageDirective>(false) != null)
+                    ServiceManager.getService(project, PerModulePackageCacheService::class.java).notifyPackageChange(file)
+            }
+            PsiTreeChangeEventImpl.PsiEventType.CHILDREN_CHANGED -> {
+                val parent = event.parent ?: run {
+                    LOG.debugIfEnabled(project, true) { "Got PsiEvent: $event without parent" }
+                    return
+                }
+                val childrenOfType = parent.getChildrenOfType<KtPackageDirective>()
+                if (
+                    (!event.isGenericChange && (childrenOfType.any() || parent is KtPackageDirective)) ||
+                    (childrenOfType.any { it.name.isEmpty() } && parent is KtFile)
+                ) {
+                    ServiceManager.getService(project, PerModulePackageCacheService::class.java).notifyPackageChange(file)
+                }
+            }
+            else -> {
+            }
+        }
+    }
+
+    companion object {
+        val LOG = Logger.getInstance(this::class.java)
+    }
+}
+
+private typealias ImplicitPackageData = MutableMap<FqName, MutableList<VirtualFile>>
+
+class ImplicitPackagePrefixCache(private val project: Project) {
+    private val implicitPackageCache = ConcurrentHashMap<VirtualFile, ImplicitPackageData>()
+
+    fun getPrefix(sourceRoot: VirtualFile): FqName {
+        val implicitPackageMap = implicitPackageCache.getOrPut(sourceRoot) { analyzeImplicitPackagePrefixes(sourceRoot) }
+        return implicitPackageMap.keys.singleOrNull() ?: FqName.ROOT
+    }
+
+    internal fun clear() {
+        implicitPackageCache.clear()
+    }
+
+    private fun analyzeImplicitPackagePrefixes(sourceRoot: VirtualFile): MutableMap<FqName, MutableList<VirtualFile>> {
+        val result = mutableMapOf<FqName, MutableList<VirtualFile>>()
+        val ktFiles = sourceRoot.children.filter { it.fileType == KotlinFileType.INSTANCE }
+        for (ktFile in ktFiles) {
+            result.addFile(ktFile)
+        }
+        return result
+    }
+
+    private fun ImplicitPackageData.addFile(ktFile: VirtualFile) {
+        synchronized(this) {
+            val psiFile = PsiManager.getInstance(project).findFile(ktFile) as? KtFile ?: return
+            addPsiFile(psiFile, ktFile)
+        }
+    }
+
+    private fun ImplicitPackageData.addPsiFile(
+        psiFile: KtFile,
+        ktFile: VirtualFile
+    ) = getOrPut(psiFile.packageFqName) { mutableListOf() }.add(ktFile)
+
+    private fun ImplicitPackageData.removeFile(file: VirtualFile) {
+        synchronized(this) {
+            for ((key, value) in this) {
+                if (value.remove(file)) {
+                    if (value.isEmpty()) remove(key)
+                    break
+                }
+            }
+        }
+    }
+
+    private fun ImplicitPackageData.updateFile(file: KtFile) {
+        synchronized(this) {
+            removeFile(file.virtualFile)
+            addPsiFile(file, file.virtualFile)
+        }
+    }
+
+    internal fun update(event: VFileEvent) {
+        when (event) {
+            is VFileCreateEvent -> checkNewFileInSourceRoot(event.file)
+            is VFileDeleteEvent -> checkDeletedFileInSourceRoot(event.file)
+            is VFileCopyEvent -> {
+                val newParent = event.newParent
+                if (newParent.isValid) {
+                    checkNewFileInSourceRoot(newParent.findChild(event.newChildName))
+                }
+            }
+            is VFileMoveEvent -> {
+                checkNewFileInSourceRoot(event.file)
+                if (event.oldParent.getSourceRoot(project) == event.oldParent) {
+                    implicitPackageCache[event.oldParent]?.removeFile(event.file)
+                }
+            }
+        }
+    }
+
+    private fun checkNewFileInSourceRoot(file: VirtualFile?) {
+        if (file == null) return
+        if (file.getSourceRoot(project) == file.parent) {
+            implicitPackageCache[file.parent]?.addFile(file)
+        }
+    }
+
+    private fun checkDeletedFileInSourceRoot(file: VirtualFile?) {
+        val directory = file?.parent
+        if (directory == null || !directory.isValid) return
+        if (directory.getSourceRoot(project) == directory) {
+            implicitPackageCache[directory]?.removeFile(file)
+        }
+    }
+
+    internal fun update(ktFile: KtFile) {
+        val parent = ktFile.virtualFile?.parent ?: return
+        if (ktFile.sourceRoot == parent) {
+            implicitPackageCache[parent]?.updateFile(ktFile)
+        }
+    }
+}
+
+class PerModulePackageCacheService(private val project: Project) : Disposable {
+
+    /*
+     * Actually an WeakMap<Module, SoftMap<ModuleSourceInfo, SoftMap<FqName, Boolean>>>
+     */
+    private val cache = ContainerUtil.createConcurrentWeakMap<Module, ConcurrentMap<ModuleSourceInfo, ConcurrentMap<FqName, Boolean>>>()
+    private val implicitPackagePrefixCache = ImplicitPackagePrefixCache(project)
+
+    private val pendingVFileChanges: MutableSet<VFileEvent> = mutableSetOf()
+    private val pendingKtFileChanges: MutableSet<KtFile> = mutableSetOf()
+
+    private val projectScope = GlobalSearchScope.projectScope(project)
+
+    internal fun onTooComplexChange() {
+        clear()
+    }
+
+    private fun clear() {
+        synchronized(this) {
+            pendingVFileChanges.clear()
+            pendingKtFileChanges.clear()
+            cache.clear()
+            implicitPackagePrefixCache.clear()
+        }
+    }
+
+    internal fun notifyPackageChange(file: VFileEvent): Unit = synchronized(this) {
+        pendingVFileChanges += file
+    }
+
+    internal fun notifyPackageChange(file: KtFile): Unit = synchronized(this) {
+        pendingKtFileChanges += file
+    }
+
+    private fun invalidateCacheForModuleSourceInfo(moduleSourceInfo: ModuleSourceInfo) {
+        LOG.debugIfEnabled(project) { "Invalidated cache for $moduleSourceInfo" }
+        val perSourceInfoData = cache[moduleSourceInfo.module] ?: return
+        val dataForSourceInfo = perSourceInfoData[moduleSourceInfo] ?: return
+        dataForSourceInfo.clear()
+    }
+
+    private fun checkPendingChanges() = synchronized(this) {
+        if (pendingVFileChanges.size + pendingKtFileChanges.size >= FULL_DROP_THRESHOLD) {
+            onTooComplexChange()
+        } else {
+            pendingVFileChanges.processPending { event ->
+                val vfile = event.file ?: return@processPending
+                // When VirtualFile !isValid (deleted for example), it impossible to use getModuleInfoByVirtualFile
+                // For directory we must check both is it in some sourceRoot, and is it contains some sourceRoot
+                if (vfile.isDirectory || !vfile.isValid) {
+                    for ((module, data) in cache) {
+                        val sourceRootUrls = module.rootManager.sourceRootUrls
+                        if (sourceRootUrls.any { url ->
+                                vfile.containedInOrContains(url)
+                            }) {
+                            LOG.debugIfEnabled(project) { "Invalidated cache for $module" }
+                            data.clear()
+                        }
+                    }
+                } else {
+                    val infoByVirtualFile = getModuleInfoByVirtualFile(project, vfile)
+                    if (infoByVirtualFile == null || infoByVirtualFile !is ModuleSourceInfo) {
+                        LOG.debugIfEnabled(project) { "Skip $vfile as it has mismatched ModuleInfo=$infoByVirtualFile" }
+                    }
+                    (infoByVirtualFile as? ModuleSourceInfo)?.let {
+                        invalidateCacheForModuleSourceInfo(it)
+                    }
+                }
+
+                implicitPackagePrefixCache.update(event)
+            }
+
+            pendingKtFileChanges.processPending { file ->
+                if (file.virtualFile != null && file.virtualFile !in projectScope) {
+                    LOG.debugIfEnabled(project) {
+                        "Skip $file without vFile, or not in scope: ${file.virtualFile?.let { it !in projectScope }}"
+                    }
+                    return@processPending
+                }
+                val nullableModuleInfo = file.getNullableModuleInfo()
+                (nullableModuleInfo as? ModuleSourceInfo)?.let { invalidateCacheForModuleSourceInfo(it) }
+                if (nullableModuleInfo == null || nullableModuleInfo !is ModuleSourceInfo) {
+                    LOG.debugIfEnabled(project) { "Skip $file as it has mismatched ModuleInfo=$nullableModuleInfo" }
+                }
+                implicitPackagePrefixCache.update(file)
+            }
+        }
+    }
+
+    private inline fun <T> MutableCollection<T>.processPending(crossinline body: (T) -> Unit) {
+        this.removeIf { value ->
+            try {
+                body(value)
+            } catch (pce: ProcessCanceledException) {
+                throw pce
+            } catch (exc: Exception) {
+                // Log and proceed. Otherwise pending object processing won't be cleared and exception will be thrown forever.
+                LOG.error(exc)
+            }
+
+            return@removeIf true
+        }
+    }
+
+    private fun VirtualFile.containedInOrContains(root: String) =
+        (VfsUtilCore.isEqualOrAncestor(url, root)
+                || isDirectory && VfsUtilCore.isEqualOrAncestor(root, url))
+
+
+    fun packageExists(packageFqName: FqName, moduleInfo: ModuleSourceInfo): Boolean {
+        val module = moduleInfo.module
+        checkPendingChanges()
+
+        val perSourceInfoCache = cache.getOrPut(module) {
+            ContainerUtil.createConcurrentSoftMap()
+        }
+        val cacheForCurrentModuleInfo = perSourceInfoCache.getOrPut(moduleInfo) {
+            ContainerUtil.createConcurrentSoftMap()
+        }
+
+        return cacheForCurrentModuleInfo.getOrPut(packageFqName) {
+            val packageExists = PackageIndexUtil.packageExists(packageFqName, moduleInfo.contentScope(), project)
+            LOG.debugIfEnabled(project) { "Computed cache value for $packageFqName in $moduleInfo is $packageExists" }
+            packageExists
+        }
+    }
+
+    fun getImplicitPackagePrefix(sourceRoot: VirtualFile): FqName {
+        checkPendingChanges()
+        return implicitPackagePrefixCache.getPrefix(sourceRoot)
+    }
+
+    override fun dispose() {
+        clear()
+    }
+
+    companion object {
+        const val FULL_DROP_THRESHOLD = 1000
+        private val LOG = Logger.getInstance(this::class.java)
+
+        fun getInstance(project: Project): PerModulePackageCacheService =
+            ServiceManager.getService(project, PerModulePackageCacheService::class.java)
+
+        var Project.DEBUG_LOG_ENABLE_PerModulePackageCache: Boolean
+                by NotNullableUserDataProperty<Project, Boolean>(Key.create("debug.PerModulePackageCache"), false)
+    }
+}
+
+private fun Logger.debugIfEnabled(project: Project, withCurrentTrace: Boolean = false, message: () -> String) {
+    if (ApplicationManager.getApplication().isUnitTestMode && project.DEBUG_LOG_ENABLE_PerModulePackageCache) {
+        val msg = message()
+        if (withCurrentTrace) {
+            val e = Exception().apply { fillInStackTrace() }
+            this.debug(msg, e)
+        } else {
+            this.debug(msg)
+        }
+    }
+}

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/LibraryModificationTracker.kt

@@ -7,7 +7,6 @@ package org.jetbrains.kotlin.idea.caches.project
 
 import com.intellij.ide.highlighter.ArchiveFileType
 import com.intellij.openapi.application.ApplicationManager
-import com.intellij.openapi.components.ServiceManager
 import com.intellij.openapi.fileTypes.FileTypeEvent
 import com.intellij.openapi.fileTypes.FileTypeListener
 import com.intellij.openapi.fileTypes.FileTypeManager
@@ -23,15 +22,16 @@ import com.intellij.openapi.vfs.newvfs.events.VFileCopyEvent
 import com.intellij.openapi.vfs.newvfs.events.VFileCreateEvent
 import com.intellij.openapi.vfs.newvfs.events.VFileEvent
 import com.intellij.openapi.vfs.newvfs.events.VFileMoveEvent
+import org.jetbrains.kotlin.idea.util.application.getServiceSafe
 
 class LibraryModificationTracker(project: Project) : SimpleModificationTracker() {
     companion object {
         @JvmStatic
-        fun getInstance(project: Project) = ServiceManager.getService(project, LibraryModificationTracker::class.java)!!
+        fun getInstance(project: Project) = project.getServiceSafe(LibraryModificationTracker::class.java)
     }
 
     init {
-        val connection = project.messageBus.connect()
+        val connection = project.messageBus.connect(project)
         connection.subscribe(VirtualFileManager.VFS_CHANGES, object : BulkFileListener {
             override fun after(events: List<VFileEvent>) {
                 events.filter(::isRelevantEvent).let { createEvents ->

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/trackers/KotlinCodeBlockModificationListener.kt

@@ -72,7 +72,7 @@ class KotlinCodeBlockModificationListener(
 
     init {
         val model = PomManager.getModel(project)
-        val messageBusConnection = project.messageBus.connect()
+        val messageBusConnection = project.messageBus.connect(project)
 
         if (isLanguageTrackerEnabled) {
             (PsiManager.getInstance(project) as PsiManagerImpl).addTreeChangePreprocessor(this)
@@ -175,7 +175,7 @@ class KotlinCodeBlockModificationListener(
             // When a code fragment is reparsed, Intellij doesn't do an AST diff and considers the entire
             // contents to be replaced, which is represented in a POM event as an empty list of changed elements
 
-            return elements.mapNotNull { element ->
+            return elements.map { element ->
                 val modificationScope = getInsideCodeBlockModificationScope(element.psi) ?: return emptyList()
                 modificationScope.blockDeclaration
             }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/trackers/KotlinCodeBlockModificationListener.kt.201

@@ -0,0 +1,362 @@
+/*
+ * Copyright 2010-2019 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.caches.trackers
+
+import com.intellij.lang.ASTNode
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.util.Key
+import com.intellij.openapi.util.ModificationTracker
+import com.intellij.openapi.util.SimpleModificationTracker
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.pom.PomManager
+import com.intellij.pom.PomModelAspect
+import com.intellij.pom.event.PomModelEvent
+import com.intellij.pom.event.PomModelListener
+import com.intellij.pom.tree.TreeAspect
+import com.intellij.pom.tree.events.TreeChangeEvent
+import com.intellij.pom.tree.events.impl.ChangeInfoImpl
+import com.intellij.psi.*
+import com.intellij.psi.impl.PsiManagerImpl
+import com.intellij.psi.impl.PsiModificationTrackerImpl
+import com.intellij.psi.impl.PsiTreeChangeEventImpl
+import com.intellij.psi.impl.PsiTreeChangeEventImpl.PsiEventType.CHILD_MOVED
+import com.intellij.psi.impl.PsiTreeChangeEventImpl.PsiEventType.PROPERTY_CHANGED
+import com.intellij.psi.impl.PsiTreeChangePreprocessor
+import com.intellij.psi.util.PsiModificationTracker
+import com.intellij.psi.util.PsiTreeUtil
+import org.jetbrains.kotlin.idea.KotlinLanguage
+import org.jetbrains.kotlin.idea.util.application.getServiceSafe
+import org.jetbrains.kotlin.kdoc.psi.api.KDoc
+import org.jetbrains.kotlin.psi.*
+import org.jetbrains.kotlin.psi.psiUtil.getTopmostParentOfType
+import org.jetbrains.kotlin.psi.psiUtil.isAncestor
+
+val KOTLIN_CONSOLE_KEY = Key.create<Boolean>("kotlin.console")
+
+/**
+ * Tested in OutOfBlockModificationTestGenerated
+ */
+class KotlinCodeBlockModificationListener(project: Project) : PsiTreeChangePreprocessor {
+    private val treeAspect: TreeAspect = TreeAspect.getInstance(project)
+
+    private val modificationTrackerImpl: PsiModificationTrackerImpl =
+        PsiModificationTracker.SERVICE.getInstance(project) as PsiModificationTrackerImpl
+
+    @Volatile
+    private var kotlinModificationTracker: Long = 0
+
+    private val kotlinOutOfCodeBlockTrackerImpl: SimpleModificationTracker = SimpleModificationTracker()
+
+    val kotlinOutOfCodeBlockTracker: ModificationTracker = kotlinOutOfCodeBlockTrackerImpl
+
+    internal val perModuleOutOfCodeBlockTrackerUpdater = KotlinModuleOutOfCodeBlockModificationTracker.Updater(project)
+
+    init {
+        val model = PomManager.getModel(project)
+        val messageBusConnection = project.messageBus.connect(project)
+
+        val psiManager = PsiManager.getInstance(project) as PsiManagerImpl
+        psiManager.addTreeChangePreprocessor(this)
+
+        model.addModelListener(object : PomModelListener {
+            override fun isAspectChangeInteresting(aspect: PomModelAspect): Boolean {
+                return aspect == treeAspect
+            }
+
+            override fun modelChanged(event: PomModelEvent) {
+                val changeSet = event.getChangeSet(treeAspect) as TreeChangeEvent? ?: return
+                val ktFile = changeSet.rootElement.psi.containingFile as? KtFile ?: return
+
+                incFileModificationCount(ktFile)
+
+                val changedElements = changeSet.changedElements
+
+                // skip change if it contains only virtual/fake change
+                if (changedElements.isNotEmpty()) {
+                    // ignore formatting (whitespaces etc)
+                    if (isFormattingChange(changeSet) || isCommentChange(changeSet)) return
+                }
+
+                val inBlockElements = inBlockModifications(changedElements)
+
+                val physical = ktFile.isPhysical
+                if (inBlockElements.isEmpty()) {
+                    messageBusConnection.deliverImmediately()
+
+                    if (physical && !isReplLine(ktFile.virtualFile) && ktFile !is KtTypeCodeFragment) {
+                        kotlinOutOfCodeBlockTrackerImpl.incModificationCount()
+                        perModuleOutOfCodeBlockTrackerUpdater.onKotlinPhysicalFileOutOfBlockChange(ktFile, true)
+                    }
+
+                    ktFile.incOutOfBlockModificationCount()
+                } else if (physical) {
+                    inBlockElements.forEach { it.containingKtFile.addInBlockModifiedItem(it) }
+                }
+            }
+        })
+
+        @Suppress("UnstableApiUsage")
+        messageBusConnection.subscribe(PsiModificationTracker.TOPIC, PsiModificationTracker.Listener {
+            val kotlinTrackerInternalIDECount =
+                modificationTrackerImpl.forLanguage(KotlinLanguage.INSTANCE).modificationCount
+            if (kotlinModificationTracker == kotlinTrackerInternalIDECount) {
+                // Some update that we are not sure is from Kotlin language, as Kotlin language tracker wasn't changed
+                kotlinOutOfCodeBlockTrackerImpl.incModificationCount()
+            } else {
+                kotlinModificationTracker = kotlinTrackerInternalIDECount
+            }
+
+            perModuleOutOfCodeBlockTrackerUpdater.onPsiModificationTrackerUpdate()
+        })
+    }
+
+    override fun treeChanged(event: PsiTreeChangeEventImpl) {
+        if (!PsiModificationTrackerImpl.canAffectPsi(event)) {
+            return
+        }
+
+        // Copy logic from PsiModificationTrackerImpl.treeChanged(). Some out-of-code-block events are written to language modification
+        // tracker in PsiModificationTrackerImpl but don't have correspondent PomModelEvent. Increase kotlinOutOfCodeBlockTracker
+        // manually if needed.
+        val outOfCodeBlock = when (event.code) {
+            PROPERTY_CHANGED ->
+                event.propertyName === PsiTreeChangeEvent.PROP_UNLOADED_PSI || event.propertyName === PsiTreeChangeEvent.PROP_ROOTS
+            CHILD_MOVED -> event.oldParent is PsiDirectory || event.newParent is PsiDirectory
+            else -> event.parent is PsiDirectory
+        }
+
+        if (outOfCodeBlock) {
+            kotlinOutOfCodeBlockTrackerImpl.incModificationCount()
+        }
+    }
+
+    companion object {
+        private fun isReplLine(file: VirtualFile): Boolean {
+            return file.getUserData(KOTLIN_CONSOLE_KEY) == true
+        }
+
+        private fun incFileModificationCount(file: KtFile) {
+            val tracker = file.getUserData(PER_FILE_MODIFICATION_TRACKER)
+                ?: file.putUserDataIfAbsent(PER_FILE_MODIFICATION_TRACKER, SimpleModificationTracker())
+            tracker.incModificationCount()
+        }
+
+        private fun inBlockModifications(elements: Array<ASTNode>): List<KtElement> {
+            // When a code fragment is reparsed, Intellij doesn't do an AST diff and considers the entire
+            // contents to be replaced, which is represented in a POM event as an empty list of changed elements
+
+            return elements.map { element ->
+                val modificationScope = getInsideCodeBlockModificationScope(element.psi) ?: return emptyList()
+                modificationScope.blockDeclaration
+            }
+        }
+
+        private fun isSpecificChange(changeSet: TreeChangeEvent, precondition: (ASTNode?) -> Boolean): Boolean =
+            changeSet.changedElements.all { changedElement ->
+                val changesByElement = changeSet.getChangesByElement(changedElement)
+                changesByElement.affectedChildren.all { affectedChild ->
+                    if (!precondition(affectedChild)) return@all false
+                    val changeByChild = changesByElement.getChangeByChild(affectedChild)
+                    return@all if (changeByChild is ChangeInfoImpl) {
+                        val oldChild = changeByChild.oldChild
+                        precondition(oldChild)
+                    } else false
+                }
+            }
+
+        private fun isCommentChange(changeSet: TreeChangeEvent): Boolean =
+            isSpecificChange(changeSet) { it is PsiComment || it is KDoc }
+
+        private fun isFormattingChange(changeSet: TreeChangeEvent): Boolean =
+            isSpecificChange(changeSet) { it is PsiWhiteSpace }
+
+        /**
+         * Has to be aligned with [getInsideCodeBlockModificationScope] :
+         *
+         * result of analysis has to be reflected in dirty scope,
+         * the only difference is whitespaces and comments
+         */
+        fun getInsideCodeBlockModificationDirtyScope(element: PsiElement): PsiElement? {
+            if (!element.isPhysical) return null
+            // dirty scope for whitespaces and comments is the element itself
+            if (element is PsiWhiteSpace || element is PsiComment || element is KDoc) return element
+
+            return getInsideCodeBlockModificationScope(element)?.blockDeclaration ?: null
+        }
+
+        fun getInsideCodeBlockModificationScope(element: PsiElement): BlockModificationScopeElement? {
+            val lambda = element.getTopmostParentOfType<KtLambdaExpression>()
+            if (lambda is KtLambdaExpression) {
+                lambda.getTopmostParentOfType<KtSuperTypeCallEntry>()?.getTopmostParentOfType<KtClassOrObject>()?.let {
+                    return BlockModificationScopeElement(it, it)
+                }
+            }
+
+            val blockDeclaration =
+                KtPsiUtil.getTopmostParentOfTypes(element, *BLOCK_DECLARATION_TYPES) as? KtDeclaration ?: return null
+//                KtPsiUtil.getTopmostParentOfType<KtClassOrObject>(element) as? KtDeclaration ?: return null
+
+            // should not be local declaration
+            if (KtPsiUtil.isLocal(blockDeclaration))
+                return null
+
+            when (blockDeclaration) {
+                is KtNamedFunction -> {
+//                    if (blockDeclaration.visibilityModifierType()?.toVisibility() == Visibilities.PRIVATE) {
+//                        topClassLikeDeclaration(blockDeclaration)?.let {
+//                            return BlockModificationScopeElement(it, it)
+//                        }
+//                    }
+                    if (blockDeclaration.hasBlockBody()) {
+                        // case like `fun foo(): String {...<caret>...}`
+                        return blockDeclaration.bodyExpression
+                            ?.takeIf { it.isAncestor(element) }
+                            ?.let { BlockModificationScopeElement(blockDeclaration, it) }
+                    } else if (blockDeclaration.hasDeclaredReturnType()) {
+                        // case like `fun foo(): String = b<caret>labla`
+                        return blockDeclaration.initializer
+                            ?.takeIf { it.isAncestor(element) }
+                            ?.let { BlockModificationScopeElement(blockDeclaration, it) }
+                    }
+                }
+
+                is KtProperty -> {
+//                    if (blockDeclaration.visibilityModifierType()?.toVisibility() == Visibilities.PRIVATE) {
+//                        topClassLikeDeclaration(blockDeclaration)?.let {
+//                            return BlockModificationScopeElement(it, it)
+//                        }
+//                    }
+                    if (blockDeclaration.typeReference != null) {
+                        val accessors =
+                            blockDeclaration.accessors.map { it.initializer ?: it.bodyExpression } + blockDeclaration.initializer
+                        for (accessor in accessors) {
+                            accessor?.takeIf {
+                                    it.isAncestor(element) &&
+                                            // adding annotations to accessor is the same as change contract of property
+                                            (element !is KtAnnotated || element.annotationEntries.isEmpty())
+                                }
+                                ?.let { expression ->
+                                    val declaration =
+                                        KtPsiUtil.getTopmostParentOfTypes(blockDeclaration, KtClassOrObject::class.java) as? KtElement ?:
+                                        // ktFile to check top level property declarations
+                                        return null
+                                    return BlockModificationScopeElement(declaration, expression)
+                                }
+                        }
+                    }
+                }
+
+                is KtScriptInitializer -> {
+                    return (blockDeclaration.body as? KtCallExpression)
+                        ?.lambdaArguments
+                        ?.lastOrNull()
+                        ?.getLambdaExpression()
+                        ?.takeIf { it.isAncestor(element) }
+                        ?.let { BlockModificationScopeElement(blockDeclaration, it) }
+                }
+
+                is KtClassInitializer -> {
+                    blockDeclaration
+                        .takeIf { it.isAncestor(element) }
+                        ?.let { ktClassInitializer ->
+                            (PsiTreeUtil.getParentOfType(blockDeclaration, KtClassOrObject::class.java))?.let {
+                                return BlockModificationScopeElement(it, ktClassInitializer)
+                            }
+                        }
+                }
+
+                is KtSecondaryConstructor -> {
+                    blockDeclaration
+                        ?.takeIf {
+                            it.bodyExpression?.isAncestor(element) ?: false || it.getDelegationCallOrNull()?.isAncestor(element) ?: false
+                        }?.let { ktConstructor ->
+                            PsiTreeUtil.getParentOfType(blockDeclaration, KtClassOrObject::class.java)?.let {
+                                return BlockModificationScopeElement(it, ktConstructor)
+                            }
+                        }
+                }
+//                is KtClassOrObject -> {
+//                    return when (element) {
+//                        is KtProperty, is KtNamedFunction -> {
+//                            if ((element as? KtModifierListOwner)?.visibilityModifierType()?.toVisibility() == Visibilities.PRIVATE)
+//                                BlockModificationScopeElement(blockDeclaration, blockDeclaration) else null
+//                        }
+//                        else -> null
+//                    }
+//                }
+
+                else -> throw IllegalStateException()
+            }
+
+            return null
+        }
+
+        data class BlockModificationScopeElement(val blockDeclaration: KtElement, val element: KtElement)
+
+        fun isBlockDeclaration(declaration: KtDeclaration): Boolean {
+            return BLOCK_DECLARATION_TYPES.any { it.isInstance(declaration) }
+        }
+
+        private val BLOCK_DECLARATION_TYPES = arrayOf<Class<out KtDeclaration>>(
+            KtProperty::class.java,
+            KtNamedFunction::class.java,
+            KtClassInitializer::class.java,
+            KtSecondaryConstructor::class.java,
+            KtScriptInitializer::class.java
+        )
+
+        fun getInstance(project: Project): KotlinCodeBlockModificationListener =
+            project.getServiceSafe(KotlinCodeBlockModificationListener::class.java)
+    }
+}
+
+private val PER_FILE_MODIFICATION_TRACKER = Key<SimpleModificationTracker>("FILE_OUT_OF_BLOCK_MODIFICATION_COUNT")
+
+val KtFile.perFileModificationTracker: ModificationTracker
+    get() = putUserDataIfAbsent(PER_FILE_MODIFICATION_TRACKER, SimpleModificationTracker())
+
+private val FILE_OUT_OF_BLOCK_MODIFICATION_COUNT = Key<Long>("FILE_OUT_OF_BLOCK_MODIFICATION_COUNT")
+
+val KtFile.outOfBlockModificationCount: Long by NotNullableUserDataProperty(FILE_OUT_OF_BLOCK_MODIFICATION_COUNT, 0)
+
+private fun KtFile.incOutOfBlockModificationCount() {
+    clearInBlockModifications()
+
+    val count = getUserData(FILE_OUT_OF_BLOCK_MODIFICATION_COUNT) ?: 0
+    putUserData(FILE_OUT_OF_BLOCK_MODIFICATION_COUNT, count + 1)
+}
+
+/**
+ * inBlockModifications is a collection of block elements those have in-block modifications
+ */
+private val IN_BLOCK_MODIFICATIONS = Key<MutableCollection<KtElement>>("IN_BLOCK_MODIFICATIONS")
+private val FILE_IN_BLOCK_MODIFICATION_COUNT = Key<Long>("FILE_IN_BLOCK_MODIFICATION_COUNT")
+
+val KtFile.inBlockModificationCount: Long by NotNullableUserDataProperty(FILE_IN_BLOCK_MODIFICATION_COUNT, 0)
+
+val KtFile.inBlockModifications: Collection<KtElement>
+    get() {
+        val collection = getUserData(IN_BLOCK_MODIFICATIONS)
+        return collection ?: emptySet()
+    }
+
+private fun KtFile.addInBlockModifiedItem(element: KtElement) {
+    val collection = putUserDataIfAbsent(IN_BLOCK_MODIFICATIONS, mutableSetOf())
+    synchronized(collection) {
+        collection.add(element)
+    }
+    val count = getUserData(FILE_IN_BLOCK_MODIFICATION_COUNT) ?: 0
+    putUserData(FILE_IN_BLOCK_MODIFICATION_COUNT, count + 1)
+}
+
+fun KtFile.clearInBlockModifications() {
+    val collection = getUserData(IN_BLOCK_MODIFICATIONS)
+    collection?.let {
+        synchronized(it) {
+            it.clear()
+        }
+    }
+}

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/trackers/KotlinModuleOutOfCodeBlockModificationTracker.kt

@@ -95,7 +95,7 @@ class KotlinModuleOutOfCodeBlockModificationTracker private constructor(private
             }
         }
 
-        internal fun onPsiModificationTrackerUpdate(customIncrement: Int) {
+        internal fun onPsiModificationTrackerUpdate(customIncrement: Int = 0) {
             val newModCount = kotlinOfOfCodeBlockTracker.modificationCount
             val affectedModule = lastAffectedModule
             if (affectedModule != null && newModCount == lastAffectedModuleModCount + customIncrement) {

idea/idea-analysis/src/org/jetbrains/kotlin/idea/util/ApplicationUtils.kt

@@ -50,4 +50,7 @@ inline fun invokeLater(crossinline action: () -> Unit) {
     ApplicationManager.getApplication().invokeLater { action() }
 }
 
-inline fun isUnitTestMode(): Boolean = ApplicationManager.getApplication().isUnitTestMode
+inline fun isUnitTestMode(): Boolean = ApplicationManager.getApplication().isUnitTestMode
+
+fun <T> Project.getServiceSafe(serviceClass: Class<T>): T =
+    this.getService(serviceClass) ?: error("Unable to locate service ${serviceClass.name}")

idea/idea-analysis/src/org/jetbrains/kotlin/idea/util/ApplicationUtils.kt.192

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.idea.util.application
 
 import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.command.CommandProcessor
+import com.intellij.openapi.components.ServiceManager
 import com.intellij.openapi.progress.ProgressIndicator
 import com.intellij.openapi.progress.ProgressIndicatorProvider
 import com.intellij.openapi.progress.ProgressManager
@@ -52,4 +53,7 @@ inline fun invokeLater(crossinline action: () -> Unit) {
     ApplicationManager.getApplication().invokeLater { action() }
 }
 
-inline fun isUnitTestMode(): Boolean = ApplicationManager.getApplication().isUnitTestMode
+inline fun isUnitTestMode(): Boolean = ApplicationManager.getApplication().isUnitTestMode
+
+fun <T> Project.getServiceSafe(serviceClass: Class<T>): T =
+    ServiceManager.getService(this, serviceClass) ?: error("Unable to locate service ${serviceClass.name}")

idea/idea-analysis/src/org/jetbrains/kotlin/idea/util/ApplicationUtils.kt.201

@@ -50,4 +50,7 @@ inline fun invokeLater(crossinline action: () -> Unit) {
     ApplicationManager.getApplication().invokeLater { action() }
 }
 
-inline fun isUnitTestMode(): Boolean = ApplicationManager.getApplication().isUnitTestMode
+inline fun isUnitTestMode(): Boolean = ApplicationManager.getApplication().isUnitTestMode
+
+fun <T> Project.getServiceSafe(serviceClass: Class<T>) =
+    this.getService(serviceClass) ?: error("Unable to locate service ${serviceClass.name}")

idea/idea-analysis/src/org/jetbrains/kotlin/idea/util/ApplicationUtils.kt.as40

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.idea.util.application
 
 import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.command.CommandProcessor
+import com.intellij.openapi.components.ServiceManager
 import com.intellij.openapi.progress.ProgressIndicator
 import com.intellij.openapi.progress.ProgressIndicatorProvider
 import com.intellij.openapi.progress.ProgressManager
@@ -52,4 +53,10 @@ inline fun invokeLater(crossinline action: () -> Unit) {
     ApplicationManager.getApplication().invokeLater { action() }
 }
 
-inline fun isUnitTestMode(): Boolean = ApplicationManager.getApplication().isUnitTestMode
+inline fun isUnitTestMode(): Boolean = ApplicationManager.getApplication().isUnitTestMode
+
+fun <T> Project.getServiceSafe(serviceClass: Class<T>): T =
+    ServiceManager.getService(this, serviceClass) ?: error("Unable to locate service ${serviceClass.name}")
+
+fun <T> Project.getServiceIfCreated(serviceClass: Class<T>): T? =
+    ServiceManager.getServiceIfCreated(this, serviceClass)

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/BasicCompletionSession.kt

@@ -126,7 +126,7 @@ class BasicCompletionSession(
 
         if (parameters.isAutoPopup) {
             collector.addLookupElementPostProcessor { lookupElement ->
-                lookupElement.putUserData(LookupCancelWatcher.AUTO_POPUP_AT, position.startOffset)
+                lookupElement.putUserData(LookupCancelService.AUTO_POPUP_AT, position.startOffset)
                 lookupElement
             }
 
@@ -533,7 +533,7 @@ class BasicCompletionSession(
     }
 
     private fun wasAutopopupRecentlyCancelled(parameters: CompletionParameters) =
-        LookupCancelWatcher.getInstance(project).wasAutoPopupRecentlyCancelled(parameters.editor, position.startOffset)
+        LookupCancelService.getInstance(project).wasAutoPopupRecentlyCancelled(parameters.editor, position.startOffset)
 
     private val KEYWORDS_ONLY = object : CompletionKind {
         override val descriptorKindFilter: DescriptorKindFilter?

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionBindingContextProvider.kt

@@ -19,6 +19,7 @@ import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.idea.analysis.analyzeInContext
 import org.jetbrains.kotlin.idea.caches.trackers.KotlinCodeBlockModificationListener
 import org.jetbrains.kotlin.idea.resolve.ResolutionFacade
+import org.jetbrains.kotlin.idea.util.application.getServiceSafe
 import org.jetbrains.kotlin.idea.util.getResolutionScope
 import org.jetbrains.kotlin.psi.KtBlockExpression
 import org.jetbrains.kotlin.psi.KtElement
@@ -46,7 +47,7 @@ class CompletionBindingContextProvider(project: Project) {
 
     companion object {
         fun getInstance(project: Project): CompletionBindingContextProvider =
-            project.getComponent(CompletionBindingContextProvider::class.java)
+            project.getServiceSafe(CompletionBindingContextProvider::class.java)
 
         var ENABLED = true
     }

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/LookupCancelService.kt

@@ -0,0 +1,100 @@
+/*
+ * Copyright 2010-2015 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.completion
+
+import com.intellij.codeInsight.lookup.LookupEvent
+import com.intellij.codeInsight.lookup.LookupListener
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.editor.Editor
+import com.intellij.openapi.editor.RangeMarker
+import com.intellij.openapi.editor.event.CaretEvent
+import com.intellij.openapi.editor.event.CaretListener
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.util.Key
+import org.jetbrains.kotlin.idea.util.application.getServiceSafe
+
+class LookupCancelService {
+    internal class Reminiscence(editor: Editor, offset: Int) {
+        var editor: Editor? = editor
+        private var marker: RangeMarker? = editor.document.createRangeMarker(offset, offset)
+
+        // forget about auto-popup cancellation when the caret is moved to the start or before it
+        private var editorListener: CaretListener? = object : CaretListener {
+            override fun caretPositionChanged(e: CaretEvent) {
+                if (!marker!!.isValid || editor.logicalPositionToOffset(e.newPosition) <= offset) {
+                    dispose()
+                }
+            }
+        }
+
+        init {
+            ApplicationManager.getApplication()!!.assertIsDispatchThread()
+            editor.caretModel.addCaretListener(editorListener!!)
+        }
+
+        fun matches(editor: Editor, offset: Int): Boolean {
+            return editor == this.editor && marker?.startOffset == offset
+        }
+
+        fun dispose() {
+            ApplicationManager.getApplication()!!.assertIsDispatchThread()
+            if (marker != null) {
+                editor!!.caretModel.removeCaretListener(editorListener!!)
+                marker = null
+                editor = null
+                editorListener = null
+            }
+        }
+    }
+
+    internal val lookupCancelListener = object : LookupListener {
+        override fun lookupCanceled(event: LookupEvent) {
+            val lookup = event.lookup
+            if (event.isCanceledExplicitly && lookup.isCompletion) {
+                val offset = lookup.currentItem?.getUserData(LookupCancelService.AUTO_POPUP_AT)
+                if (offset != null) {
+                    lastReminiscence?.dispose()
+                    if (offset <= lookup.editor.document.textLength) {
+                        lastReminiscence = Reminiscence(lookup.editor, offset)
+                    }
+                }
+            }
+        }
+    }
+
+    internal fun disposeLastReminiscence(editor: Editor) {
+        if (lastReminiscence?.editor == editor) {
+            lastReminiscence!!.dispose()
+            lastReminiscence = null
+        }
+    }
+
+    private var lastReminiscence: Reminiscence? = null
+
+    companion object {
+        fun getInstance(project: Project): LookupCancelService = project.getServiceSafe(LookupCancelService::class.java)
+
+        fun getServiceIfCreated(project: Project): LookupCancelService? = project.getServiceIfCreated(LookupCancelService::class.java)
+
+        val AUTO_POPUP_AT = Key<Int>("LookupCancelService.AUTO_POPUP_AT")
+    }
+
+    fun wasAutoPopupRecentlyCancelled(editor: Editor, offset: Int): Boolean {
+        return lastReminiscence?.matches(editor, offset) ?: false
+    }
+
+}

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/LookupCancelService.kt.192

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2010-2015 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.completion
+
+typealias LookupCancelService = LookupCancelWatcher

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/LookupCancelWatcher.kt

@@ -22,83 +22,18 @@ import com.intellij.codeInsight.lookup.Lookup
 import com.intellij.codeInsight.lookup.LookupEvent
 import com.intellij.codeInsight.lookup.LookupListener
 import com.intellij.codeInsight.lookup.LookupManager
-import com.intellij.openapi.application.ApplicationManager
-import com.intellij.openapi.components.ProjectComponent
-import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.editor.EditorFactory
-import com.intellij.openapi.editor.RangeMarker
-import com.intellij.openapi.editor.event.CaretEvent
-import com.intellij.openapi.editor.event.CaretListener
 import com.intellij.openapi.editor.event.EditorFactoryEvent
 import com.intellij.openapi.editor.event.EditorFactoryListener
 import com.intellij.openapi.project.Project
-import com.intellij.openapi.util.Key
+import com.intellij.openapi.startup.StartupActivity
 import org.jetbrains.kotlin.idea.statistics.CompletionFUSCollector
 import org.jetbrains.kotlin.idea.statistics.CompletionFUSCollector.completionStatsData
 import org.jetbrains.kotlin.idea.statistics.FinishReasonStats
 
-class LookupCancelWatcher(val project: Project) : ProjectComponent {
-    private class Reminiscence(editor: Editor, offset: Int) {
-        var editor: Editor? = editor
-        private var marker: RangeMarker? = editor.document.createRangeMarker(offset, offset)
+class LookupCancelWatcher : StartupActivity {
 
-        // forget about auto-popup cancellation when the caret is moved to the start or before it
-        private var editorListener: CaretListener? = object : CaretListener {
-            override fun caretPositionChanged(e: CaretEvent) {
-                if (!marker!!.isValid || editor.logicalPositionToOffset(e.newPosition) <= offset) {
-                    dispose()
-                }
-            }
-        }
-
-        init {
-            ApplicationManager.getApplication()!!.assertIsDispatchThread()
-            editor.caretModel.addCaretListener(editorListener!!)
-        }
-
-        fun matches(editor: Editor, offset: Int): Boolean {
-            return editor == this.editor && marker?.startOffset == offset
-        }
-
-        fun dispose() {
-            ApplicationManager.getApplication()!!.assertIsDispatchThread()
-            if (marker != null) {
-                editor!!.caretModel.removeCaretListener(editorListener!!)
-                marker = null
-                editor = null
-                editorListener = null
-            }
-        }
-    }
-
-    private var lastReminiscence: Reminiscence? = null
-
-    companion object {
-        fun getInstance(project: Project): LookupCancelWatcher = project.getComponent(LookupCancelWatcher::class.java)!!
-
-        val AUTO_POPUP_AT = Key<Int>("LookupCancelWatcher.AUTO_POPUP_AT")
-    }
-
-    fun wasAutoPopupRecentlyCancelled(editor: Editor, offset: Int): Boolean {
-        return lastReminiscence?.matches(editor, offset) ?: false
-    }
-
-    private val lookupCancelListener = object : LookupListener {
-        override fun lookupCanceled(event: LookupEvent) {
-            val lookup = event.lookup
-            if (event.isCanceledExplicitly && lookup.isCompletion) {
-                val offset = lookup.currentItem?.getUserData(AUTO_POPUP_AT)
-                if (offset != null) {
-                    lastReminiscence?.dispose()
-                    if (offset <= lookup.editor.document.textLength) {
-                        lastReminiscence = Reminiscence(lookup.editor, offset)
-                    }
-                }
-            }
-        }
-    }
-
-    override fun initComponent() {
+    override fun runActivity(project: Project) {
         CompletionPhaseListener.TOPIC.subscribe(project, CompletionPhaseListener { isCompletionRunning ->
             if (isCompletionRunning) {
                 if (completionStatsData != null) {
@@ -117,9 +52,7 @@ class LookupCancelWatcher(val project: Project) : ProjectComponent {
         EditorFactory.getInstance().addEditorFactoryListener(
             object : EditorFactoryListener {
                 override fun editorReleased(event: EditorFactoryEvent) {
-                    if (lastReminiscence?.editor == event.editor) {
-                        lastReminiscence!!.dispose()
-                    }
+                    LookupCancelService.getServiceIfCreated(project)?.disposeLastReminiscence(event.editor)
                 }
             },
             project
@@ -128,7 +61,7 @@ class LookupCancelWatcher(val project: Project) : ProjectComponent {
         LookupManager.getInstance(project).addPropertyChangeListener { event ->
             if (event.propertyName == LookupManager.PROP_ACTIVE_LOOKUP) {
                 val lookup = event.newValue as Lookup?
-                lookup?.addLookupListener(lookupCancelListener)
+                lookup?.addLookupListener(LookupCancelService.getInstance(project).lookupCancelListener)
                 lookup?.addLookupListener(object : LookupListener {
                     override fun lookupShown(event: LookupEvent) {
                         completionStatsData = completionStatsData?.copy(shownTime = System.currentTimeMillis())

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/LookupCancelWatcher.kt.192

@@ -0,0 +1,158 @@
+/*
+ * Copyright 2010-2015 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.completion
+
+import com.intellij.application.subscribe
+import com.intellij.codeInsight.completion.CompletionPhaseListener
+import com.intellij.codeInsight.lookup.Lookup
+import com.intellij.codeInsight.lookup.LookupEvent
+import com.intellij.codeInsight.lookup.LookupListener
+import com.intellij.codeInsight.lookup.LookupManager
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.components.ProjectComponent
+import com.intellij.openapi.editor.Editor
+import com.intellij.openapi.editor.EditorFactory
+import com.intellij.openapi.editor.RangeMarker
+import com.intellij.openapi.editor.event.CaretEvent
+import com.intellij.openapi.editor.event.CaretListener
+import com.intellij.openapi.editor.event.EditorFactoryEvent
+import com.intellij.openapi.editor.event.EditorFactoryListener
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.util.Key
+import org.jetbrains.kotlin.idea.statistics.CompletionFUSCollector
+import org.jetbrains.kotlin.idea.statistics.CompletionFUSCollector.completionStatsData
+import org.jetbrains.kotlin.idea.statistics.FinishReasonStats
+
+class LookupCancelWatcher(val project: Project) : ProjectComponent {
+    private class Reminiscence(editor: Editor, offset: Int) {
+        var editor: Editor? = editor
+        private var marker: RangeMarker? = editor.document.createRangeMarker(offset, offset)
+
+        // forget about auto-popup cancellation when the caret is moved to the start or before it
+        private var editorListener: CaretListener? = object : CaretListener {
+            override fun caretPositionChanged(e: CaretEvent) {
+                if (!marker!!.isValid || editor.logicalPositionToOffset(e.newPosition) <= offset) {
+                    dispose()
+                }
+            }
+        }
+
+        init {
+            ApplicationManager.getApplication()!!.assertIsDispatchThread()
+            editor.caretModel.addCaretListener(editorListener!!)
+        }
+
+        fun matches(editor: Editor, offset: Int): Boolean {
+            return editor == this.editor && marker?.startOffset == offset
+        }
+
+        fun dispose() {
+            ApplicationManager.getApplication()!!.assertIsDispatchThread()
+            if (marker != null) {
+                editor!!.caretModel.removeCaretListener(editorListener!!)
+                marker = null
+                editor = null
+                editorListener = null
+            }
+        }
+    }
+
+    private var lastReminiscence: Reminiscence? = null
+
+    companion object {
+        fun getInstance(project: Project): LookupCancelWatcher = project.getComponent(LookupCancelWatcher::class.java)!!
+
+        val AUTO_POPUP_AT = Key<Int>("LookupCancelWatcher.AUTO_POPUP_AT")
+    }
+
+    fun wasAutoPopupRecentlyCancelled(editor: Editor, offset: Int): Boolean {
+        return lastReminiscence?.matches(editor, offset) ?: false
+    }
+
+    private val lookupCancelListener = object : LookupListener {
+        override fun lookupCanceled(event: LookupEvent) {
+            val lookup = event.lookup
+            if (event.isCanceledExplicitly && lookup.isCompletion) {
+                val offset = lookup.currentItem?.getUserData(AUTO_POPUP_AT)
+                if (offset != null) {
+                    lastReminiscence?.dispose()
+                    if (offset <= lookup.editor.document.textLength) {
+                        lastReminiscence = Reminiscence(lookup.editor, offset)
+                    }
+                }
+            }
+        }
+    }
+
+    override fun initComponent() {
+        CompletionPhaseListener.TOPIC.subscribe(project, CompletionPhaseListener { isCompletionRunning ->
+            if (isCompletionRunning) {
+                if (completionStatsData != null) {
+                    completionStatsData = completionStatsData?.copy(finishReason = FinishReasonStats.INTERRUPTED)
+                    CompletionFUSCollector.log(completionStatsData)
+                    completionStatsData = null
+                }
+                completionStatsData = CompletionFUSCollector.CompletionStatsData(System.currentTimeMillis())
+            }
+
+            if (!isCompletionRunning) {
+                completionStatsData = completionStatsData?.copy(finishTime = System.currentTimeMillis())
+            }
+        })
+
+        EditorFactory.getInstance().addEditorFactoryListener(
+            object : EditorFactoryListener {
+                override fun editorReleased(event: EditorFactoryEvent) {
+                    if (lastReminiscence?.editor == event.editor) {
+                        lastReminiscence!!.dispose()
+                    }
+                }
+            },
+            project
+        )
+
+        LookupManager.getInstance(project).addPropertyChangeListener { event ->
+            if (event.propertyName == LookupManager.PROP_ACTIVE_LOOKUP) {
+                val lookup = event.newValue as Lookup?
+                lookup?.addLookupListener(lookupCancelListener)
+                lookup?.addLookupListener(object : LookupListener {
+                    override fun lookupShown(event: LookupEvent) {
+                        completionStatsData = completionStatsData?.copy(shownTime = System.currentTimeMillis())
+                    }
+
+                    override fun lookupCanceled(event: LookupEvent) {
+                        completionStatsData = completionStatsData?.copy(
+                            finishReason = if (event.isCanceledExplicitly) FinishReasonStats.CANCELLED else FinishReasonStats.HIDDEN
+                        )
+                        CompletionFUSCollector.log(completionStatsData)
+                        completionStatsData = null
+                    }
+
+                    override fun itemSelected(event: LookupEvent) {
+                        val eventLookup = event.lookup
+                        val lookupIndex = eventLookup.items.indexOf(eventLookup.currentItem)
+                        if (lookupIndex >= 0) completionStatsData = completionStatsData?.copy(selectedItem = lookupIndex)
+
+                        completionStatsData = completionStatsData?.copy(finishReason = FinishReasonStats.DONE)
+                        CompletionFUSCollector.log(completionStatsData)
+                        completionStatsData = null
+                    }
+                })
+            }
+        }
+    }
+}

idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/configuration/AbstractScriptConfigurationManager.kt

@@ -232,7 +232,7 @@ internal abstract class AbstractScriptConfigurationManager(
     }
 
     init {
-        val connection = project.messageBus.connect()
+        val connection = project.messageBus.connect(project)
         connection.subscribe(ProjectTopics.PROJECT_ROOTS, object : ModuleRootListener {
             override fun rootsChanged(event: ModuleRootEvent) {
                 clearClassRootsCaches()

idea/idea-gradle/tests/org/jetbrains/kotlin/idea/codeInsight/gradle/GradleMigrateTest.kt

@@ -13,8 +13,8 @@ import com.intellij.testFramework.runInEdtAndWait
 import com.intellij.util.concurrency.FutureResult
 import org.jetbrains.kotlin.config.ApiVersion
 import org.jetbrains.kotlin.config.LanguageVersion
-import org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent
-import org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent.MigrationTestState
+import org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectService
+import org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectService.MigrationTestState
 import org.jetbrains.kotlin.idea.configuration.MigrationInfo
 import org.jetbrains.plugins.gradle.tooling.annotation.TargetVersions
 import org.junit.Assert
@@ -98,7 +98,7 @@ class GradleMigrateTest : GradleImportingTestCase() {
         }
 
         val importResult = FutureResult<MigrationTestState?>()
-        val migrationProjectComponent = KotlinMigrationProjectComponent.getInstanceIfNotDisposed(myProject)
+        val migrationProjectComponent = KotlinMigrationProjectService.getInstanceIfNotDisposed(myProject)
             ?: error("Disposed project")
 
         migrationProjectComponent.setImportFinishListener { migrationState ->

idea/idea-jvm/src/org/jetbrains/kotlin/idea/compiler/configuration/KotlinBuildProcessParametersProvider.kt.191

@@ -1,39 +0,0 @@
-/*
- * Copyright 2010-2019 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.compiler.configuration
-
-import com.intellij.compiler.server.BuildProcessParametersProvider
-import com.intellij.openapi.project.Project
-import com.intellij.openapi.util.registry.Registry
-import org.jetbrains.kotlin.config.IncrementalCompilation
-import org.jetbrains.kotlin.idea.PluginStartupComponent
-
-class KotlinBuildProcessParametersProvider(private val project: Project) : BuildProcessParametersProvider() {
-    override fun getVMArguments(): MutableList<String> {
-        val compilerWorkspaceSettings = KotlinCompilerWorkspaceSettings.getInstance(project)
-
-        val res = arrayListOf<String>()
-        if (compilerWorkspaceSettings.preciseIncrementalEnabled) {
-            res.add("-D" + IncrementalCompilation.INCREMENTAL_COMPILATION_JVM_PROPERTY + "=true")
-        }
-        if (compilerWorkspaceSettings.incrementalCompilationForJsEnabled) {
-            res.add("-D" + IncrementalCompilation.INCREMENTAL_COMPILATION_JS_PROPERTY + "=true")
-        }
-        if (compilerWorkspaceSettings.enableDaemon) {
-            res.add("-Dkotlin.daemon.enabled")
-        }
-        if (Registry.`is`("kotlin.jps.instrument.bytecode", false)) {
-            res.add("-Dkotlin.jps.instrument.bytecode=true")
-        }
-        PluginStartupComponent.getInstance().aliveFlagPath.let {
-            if (!it.isBlank()) {
-                // TODO: consider taking the property name from compiler/daemon/common (check whether dependency will be not too heavy)
-                res.add("-Dkotlin.daemon.client.alive.path=\"$it\"")
-            }
-        }
-        return res
-    }
-}

idea/idea-jvm/src/org/jetbrains/kotlin/idea/configuration/KotlinExternalSystemSyncListener.kt

@@ -25,7 +25,7 @@ import org.jetbrains.kotlin.idea.configuration.ui.KotlinConfigurationCheckerServ
 class KotlinExternalSystemSyncListener : ExternalSystemTaskNotificationListenerAdapter() {
     override fun onStart(id: ExternalSystemTaskId, workingDir: String) {
         val project = id.findResolvedProject() ?: return
-        KotlinMigrationProjectComponent.getInstanceIfNotDisposed(project)?.onImportAboutToStart()
+        KotlinMigrationProjectService.getInstanceIfNotDisposed(project)?.onImportAboutToStart()
         KotlinConfigurationCheckerService.getInstanceIfNotDisposed(project)?.syncStarted()
     }
 

idea/idea-jvm/src/org/jetbrains/kotlin/idea/configuration/ui/KotlinConfigurationCheckerComponent.kt.192

@@ -38,7 +38,7 @@ class KotlinConfigurationCheckerComponent(val project: Project) : ProjectCompone
         NotificationsConfiguration.getNotificationsConfiguration()
             .register(CONFIGURE_NOTIFICATION_GROUP_ID, NotificationDisplayType.STICKY_BALLOON, true)
 
-        val connection = project.messageBus.connect()
+        val connection = project.messageBus.connect(project)
         connection.subscribe(ProjectDataImportListener.TOPIC, ProjectDataImportListener {
             notifyOutdatedBundledCompilerIfNecessary(project)
         })

idea/idea-jvm/src/org/jetbrains/kotlin/idea/configuration/ui/KotlinConfigurationCheckerService.kt

@@ -18,6 +18,8 @@ package org.jetbrains.kotlin.idea.configuration.ui
 
 import com.intellij.notification.NotificationDisplayType
 import com.intellij.notification.NotificationsConfiguration
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.application.ModalityState
 import com.intellij.openapi.application.ReadAction.nonBlocking
 import com.intellij.openapi.application.runReadAction
 import com.intellij.openapi.externalSystem.service.project.manage.ProjectDataImportListener
@@ -28,6 +30,9 @@ import org.jetbrains.kotlin.idea.configuration.getModulesWithKotlinFiles
 import org.jetbrains.kotlin.idea.configuration.notifyOutdatedBundledCompilerIfNecessary
 import org.jetbrains.kotlin.idea.configuration.ui.notifications.notifyKotlinStyleUpdateIfNeeded
 import org.jetbrains.kotlin.idea.project.getAndCacheLanguageLevelByDependencies
+import org.jetbrains.kotlin.idea.util.ProgressIndicatorUtils
+import org.jetbrains.kotlin.idea.util.application.isUnitTestMode
+import java.util.concurrent.Callable
 import java.util.concurrent.atomic.AtomicInteger
 
 class KotlinConfigurationCheckerStartupActivity : StartupActivity {
@@ -53,15 +58,24 @@ class KotlinConfigurationCheckerService(val project: Project) {
     private val syncDepth = AtomicInteger()
 
     fun performProjectPostOpenActions() {
-        nonBlocking {
-            val modulesWithKotlinFiles = getModulesWithKotlinFiles(project)
-            for (module in modulesWithKotlinFiles) {
-                module.getAndCacheLanguageLevelByDependencies()
-            }
-        }
+        nonBlocking(Callable {
+            return@Callable getModulesWithKotlinFiles(project)
+        })
             .inSmartMode(project)
             .expireWith(project)
             .coalesceBy(this)
+            .finishOnUiThread(ModalityState.any()) { modulesWithKotlinFiles ->
+                val promise = ApplicationManager.getApplication().executeOnPooledThread {
+                    for (module in modulesWithKotlinFiles) {
+                        runReadAction {
+                            module.getAndCacheLanguageLevelByDependencies()
+                        }
+                    }
+                }
+                if (isUnitTestMode()) {
+                    ProgressIndicatorUtils.awaitWithCheckCanceled(promise)
+                }
+            }
             .submit(AppExecutorUtil.getAppExecutorService())
     }
 

idea/idea-maven/src/org/jetbrains/kotlin/idea/maven/MavenImportListener.kt

@@ -10,7 +10,7 @@ import com.intellij.openapi.project.Project
 import org.jetbrains.idea.maven.project.MavenImportListener
 import org.jetbrains.idea.maven.project.MavenProject
 import org.jetbrains.idea.maven.project.MavenProjectsManager
-import org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent
+import org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectService
 import org.jetbrains.kotlin.idea.configuration.notifyOutdatedBundledCompilerIfNecessary
 
 class MavenImportListener(val project: Project) : MavenProjectsManager.Listener {
@@ -19,7 +19,7 @@ class MavenImportListener(val project: Project) : MavenProjectsManager.Listener
             MavenImportListener.TOPIC,
             MavenImportListener { _: Collection<MavenProject>, _: List<Module> ->
                 notifyOutdatedBundledCompilerIfNecessary(project)
-                KotlinMigrationProjectComponent.getInstanceIfNotDisposed(project)?.onImportFinished()
+                KotlinMigrationProjectService.getInstanceIfNotDisposed(project)?.onImportFinished()
             }
         )
 
@@ -27,6 +27,6 @@ class MavenImportListener(val project: Project) : MavenProjectsManager.Listener
     }
 
     override fun projectsScheduled() {
-        KotlinMigrationProjectComponent.getInstanceIfNotDisposed(project)?.onImportAboutToStart()
+        KotlinMigrationProjectService.getInstanceIfNotDisposed(project)?.onImportAboutToStart()
     }
 }

idea/idea-maven/test/org/jetbrains/kotlin/idea/maven/MavenMigrateTest.kt

@@ -13,8 +13,9 @@ import com.intellij.testFramework.runInEdtAndWait
 import com.intellij.util.concurrency.FutureResult
 import org.jetbrains.kotlin.config.ApiVersion
 import org.jetbrains.kotlin.config.LanguageVersion
-import org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent
+import org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectService
 import org.jetbrains.kotlin.idea.configuration.MigrationInfo
+import org.jetbrains.kotlin.idea.configuration.MigrationTestState
 import org.jetbrains.kotlin.test.JUnit3WithIdeaConfigurationRunner
 import org.junit.Assert
 import org.junit.runner.RunWith
@@ -106,8 +107,8 @@ class MavenMigrateTest : MavenImportingTestCase() {
             }
         }
 
-        val importResult = FutureResult<KotlinMigrationProjectComponent.MigrationTestState?>()
-        val migrationProjectComponent = KotlinMigrationProjectComponent.getInstanceIfNotDisposed(myProject)
+        val importResult = FutureResult<MigrationTestState?>()
+        val migrationProjectComponent = KotlinMigrationProjectService.getInstanceIfNotDisposed(myProject)
             ?: error("Disposed project")
 
         migrationProjectComponent.setImportFinishListener { migrationState ->

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

@@ -1,26 +1,4 @@
 <idea-plugin>
-  <project-components>
-    <component>
-      <implementation-class>org.jetbrains.kotlin.idea.completion.LookupCancelWatcher</implementation-class>
-    </component>
-    <component>
-      <implementation-class>org.jetbrains.kotlin.idea.caches.trackers.KotlinCodeBlockModificationListener</implementation-class>
-    </component>
-    <component>
-      <implementation-class>org.jetbrains.kotlin.idea.caches.KotlinPackageContentModificationListener</implementation-class>
-    </component>
-    <component>
-      <interface-class>org.jetbrains.kotlin.idea.completion.CompletionBindingContextProvider</interface-class>
-      <implementation-class>org.jetbrains.kotlin.idea.completion.CompletionBindingContextProvider</implementation-class>
-    </component>
-    <component>
-      <implementation-class>org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent</implementation-class>
-    </component>
-    <component>
-      <implementation-class>org.jetbrains.kotlin.idea.parameterInfo.custom.KotlinCodeHintsModel</implementation-class>
-    </component>
-  </project-components>
-
   <application-components>
     <component>
       <implementation-class>org.jetbrains.kotlin.idea.versions.KotlinUpdatePluginComponent</implementation-class>
@@ -216,14 +194,6 @@
   </actions>
 
   <extensions defaultExtensionNs="com.intellij">
-    <applicationService serviceImplementation="org.jetbrains.kotlin.idea.PluginStartupService" />
-    <postStartupActivity implementation="org.jetbrains.kotlin.idea.PluginStartupActivity"/>
-
-    <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.highlighter.KotlinBeforeResolveHighlightingPass$Registrar"/>
-    <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.highlighter.ScriptExternalHighlightingPass$Registrar"/>
-    <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.parameterInfo.custom.KotlinCodeHintsPass$Registrar"/>
-    <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.refactoring.cutPaste.MoveDeclarationsPassFactory$Registrar"/>
-
     <applicationService serviceInterface="org.jetbrains.kotlin.idea.KotlinIconProviderService"
                         serviceImplementation="org.jetbrains.kotlin.idea.KotlinIdeFileIconProviderService"/>
 
@@ -319,6 +289,8 @@
     <projectService serviceInterface="org.jetbrains.kotlin.idea.compiler.configuration.KotlinCompilerSettings"
                     serviceImplementation="org.jetbrains.kotlin.idea.compiler.configuration.KotlinCompilerSettings"/>
 
+    <projectService serviceImplementation="org.jetbrains.kotlin.idea.parameterInfo.custom.KotlinCodeHintsModel"/>
+
     <projectService serviceImplementation="org.jetbrains.kotlin.idea.compiler.configuration.KotlinCompilerWorkspaceSettings"/>
 
     <projectService serviceInterface="org.jetbrains.kotlin.asJava.classes.FacadeCache"
@@ -336,6 +308,9 @@
     <projectService serviceInterface="org.jetbrains.kotlin.idea.core.script.ScriptDependenciesModificationTracker"
                     serviceImplementation="org.jetbrains.kotlin.idea.core.script.ScriptDependenciesModificationTracker"/>
 
+    <projectService serviceInterface="org.jetbrains.kotlin.idea.completion.CompletionBindingContextProvider"
+                    serviceImplementation="org.jetbrains.kotlin.idea.completion.CompletionBindingContextProvider"/>
+
     <projectService serviceInterface="org.jetbrains.kotlin.resolve.jvm.KotlinJavaPsiFacade"
                     serviceImplementation="org.jetbrains.kotlin.resolve.jvm.KotlinJavaPsiFacade"/>
 

idea/resources/META-INF/plugin.xml

@@ -57,6 +57,12 @@ The Kotlin plugin provides language support in IntelliJ IDEA and Android Studio.
 
   <xi:include href="scripting-support.xml" xpointer="xpointer(/idea-plugin/*)"/>
 
+  <project-components>
+    <component>
+      <implementation-class>org.jetbrains.kotlin.idea.caches.trackers.KotlinCodeBlockModificationListener</implementation-class>
+    </component>
+  </project-components>
+
   <extensionPoints>
     <xi:include href="extensions/compiler.xml" xpointer="xpointer(/idea-plugin/extensionPoints/*)"/>
 
@@ -71,6 +77,20 @@ The Kotlin plugin provides language support in IntelliJ IDEA and Android Studio.
   </extensions>
 
     <extensions defaultExtensionNs="com.intellij">
+      <applicationService serviceImplementation="org.jetbrains.kotlin.idea.PluginStartupService" />
+      <postStartupActivity implementation="org.jetbrains.kotlin.idea.PluginStartupActivity"/>
+      <postStartupActivity implementation="org.jetbrains.kotlin.idea.completion.LookupCancelWatcher"/>
+      <postStartupActivity implementation="org.jetbrains.kotlin.idea.caches.KotlinPackageContentModificationListener"/>
+      <postStartupActivity implementation="org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent"/>
+
+      <projectService serviceImplementation="org.jetbrains.kotlin.idea.completion.LookupCancelService"/>
+      <projectService serviceImplementation="org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectService"/>
+
+      <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.highlighter.KotlinBeforeResolveHighlightingPass$Registrar"/>
+      <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.highlighter.ScriptExternalHighlightingPass$Registrar"/>
+      <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.parameterInfo.custom.KotlinCodeHintsPass$Registrar"/>
+      <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.refactoring.cutPaste.MoveDeclarationsPassFactory$Registrar"/>
+
       <statistics.counterUsagesCollector groupId="kotlin.gradle.target" version="2"/>
       <statistics.counterUsagesCollector groupId="kotlin.maven.target" version="3"/>
       <statistics.counterUsagesCollector groupId="kotlin.jps.target" version="3"/>

idea/resources/META-INF/plugin.xml.191

@@ -56,6 +56,40 @@ The Kotlin plugin provides language support in IntelliJ IDEA and Android Studio.
 
   <xi:include href="scripting-support.xml" xpointer="xpointer(/idea-plugin/*)"/>
 
+  <project-components>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.completion.LookupCancelWatcher</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.caches.KotlinPackageContentModificationListener</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.highlighter.KotlinBeforeResolveHighlightingPass$Factory</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.parameterInfo.custom.KotlinCodeHintsPass$Companion$Factory</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.refactoring.cutPaste.MoveDeclarationsPassFactory</implementation-class>
+        <skipForDefaultProject/>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.highlighter.ScriptExternalHighlightingPass$Factory</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.caches.trackers.KotlinCodeBlockModificationListener</implementation-class>
+      </component>
+  </project-components>
+
+  <application-components>
+    <component>
+    <implementation-class>org.jetbrains.kotlin.idea.PluginStartupComponent</implementation-class>
+    </component>
+  </application-components>
+
   <extensionPoints>
     <xi:include href="extensions/compiler.xml" xpointer="xpointer(/idea-plugin/extensionPoints/*)"/>
 

idea/resources/META-INF/plugin.xml.192

@@ -56,6 +56,40 @@ The Kotlin plugin provides language support in IntelliJ IDEA and Android Studio.
 
   <xi:include href="scripting-support.xml" xpointer="xpointer(/idea-plugin/*)"/>
 
+  <project-components>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.completion.LookupCancelWatcher</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.caches.KotlinPackageContentModificationListener</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.highlighter.KotlinBeforeResolveHighlightingPass$Factory</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.parameterInfo.custom.KotlinCodeHintsPass$Companion$Factory</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.refactoring.cutPaste.MoveDeclarationsPassFactory</implementation-class>
+        <skipForDefaultProject/>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.highlighter.ScriptExternalHighlightingPass$Factory</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.caches.trackers.KotlinCodeBlockModificationListener</implementation-class>
+      </component>
+  </project-components>
+
+  <application-components>
+    <component>
+    <implementation-class>org.jetbrains.kotlin.idea.PluginStartupComponent</implementation-class>
+    </component>
+  </application-components>
+
   <extensionPoints>
     <xi:include href="extensions/compiler.xml" xpointer="xpointer(/idea-plugin/extensionPoints/*)"/>
 

idea/resources/META-INF/plugin.xml.201

@@ -71,6 +71,22 @@ The Kotlin plugin provides language support in IntelliJ IDEA and Android Studio.
   </extensions>
 
   <extensions defaultExtensionNs="com.intellij">
+    <applicationService serviceImplementation="org.jetbrains.kotlin.idea.PluginStartupService" />
+    <postStartupActivity implementation="org.jetbrains.kotlin.idea.PluginStartupActivity"/>
+    <postStartupActivity implementation="org.jetbrains.kotlin.idea.completion.LookupCancelWatcher"/>
+    <postStartupActivity implementation="org.jetbrains.kotlin.idea.caches.KotlinPackageContentModificationListener"/>
+    <postStartupActivity implementation="org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent"/>
+
+    <projectService serviceImplementation="org.jetbrains.kotlin.idea.completion.LookupCancelService"/>
+    <projectService serviceImplementation="org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectService"/>
+
+    <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.highlighter.KotlinBeforeResolveHighlightingPass$Registrar"/>
+    <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.highlighter.ScriptExternalHighlightingPass$Registrar"/>
+    <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.parameterInfo.custom.KotlinCodeHintsPass$Registrar"/>
+    <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.refactoring.cutPaste.MoveDeclarationsPassFactory$Registrar"/>
+
+    <projectService serviceImplementation="org.jetbrains.kotlin.idea.caches.trackers.KotlinCodeBlockModificationListener"/>
+
     <statistics.counterUsagesCollector groupId="kotlin.gradle.target" version="2"/>
     <statistics.counterUsagesCollector groupId="kotlin.maven.target" version="3"/>
     <statistics.counterUsagesCollector groupId="kotlin.jps.target" version="3"/>

idea/resources/META-INF/plugin.xml.as35

@@ -57,6 +57,40 @@ The Kotlin plugin provides language support in IntelliJ IDEA and Android Studio.
 
   <xi:include href="scripting-support.xml" xpointer="xpointer(/idea-plugin/*)"/>
 
+  <project-components>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.completion.LookupCancelWatcher</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.caches.KotlinPackageContentModificationListener</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.highlighter.KotlinBeforeResolveHighlightingPass$Factory</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.parameterInfo.custom.KotlinCodeHintsPass$Companion$Factory</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.refactoring.cutPaste.MoveDeclarationsPassFactory</implementation-class>
+        <skipForDefaultProject/>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.highlighter.ScriptExternalHighlightingPass$Factory</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.caches.trackers.KotlinCodeBlockModificationListener</implementation-class>
+      </component>
+  </project-components>
+
+  <application-components>
+    <component>
+        <implementation-class>org.jetbrains.kotlin.idea.PluginStartupComponent</implementation-class>
+    </component>
+  </application-components>
+
   <extensionPoints>
     <xi:include href="extensions/compiler.xml" xpointer="xpointer(/idea-plugin/extensionPoints/*)"/>
 

idea/resources/META-INF/plugin.xml.as36

@@ -57,6 +57,40 @@ The Kotlin plugin provides language support in IntelliJ IDEA and Android Studio.
 
   <xi:include href="scripting-support.xml" xpointer="xpointer(/idea-plugin/*)"/>
 
+  <project-components>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.completion.LookupCancelWatcher</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.caches.KotlinPackageContentModificationListener</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.highlighter.KotlinBeforeResolveHighlightingPass$Factory</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.parameterInfo.custom.KotlinCodeHintsPass$Companion$Factory</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.refactoring.cutPaste.MoveDeclarationsPassFactory</implementation-class>
+        <skipForDefaultProject/>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.highlighter.ScriptExternalHighlightingPass$Factory</implementation-class>
+      </component>
+      <component>
+        <implementation-class>org.jetbrains.kotlin.idea.caches.trackers.KotlinCodeBlockModificationListener</implementation-class>
+      </component>
+  </project-components>
+
+  <application-components>
+    <component>
+        <implementation-class>org.jetbrains.kotlin.idea.PluginStartupComponent</implementation-class>
+    </component>
+  </application-components>
+
   <extensionPoints>
     <xi:include href="extensions/compiler.xml" xpointer="xpointer(/idea-plugin/extensionPoints/*)"/>
 

idea/resources/META-INF/plugin.xml.as40

@@ -56,6 +56,12 @@ The Kotlin plugin provides language support in IntelliJ IDEA and Android Studio.
 
   <xi:include href="scripting-support.xml" xpointer="xpointer(/idea-plugin/*)"/>
 
+  <project-components>
+    <component>
+      <implementation-class>org.jetbrains.kotlin.idea.caches.trackers.KotlinCodeBlockModificationListener</implementation-class>
+    </component>
+  </project-components>
+
   <extensionPoints>
     <xi:include href="extensions/compiler.xml" xpointer="xpointer(/idea-plugin/extensionPoints/*)"/>
 
@@ -65,16 +71,30 @@ The Kotlin plugin provides language support in IntelliJ IDEA and Android Studio.
 
   <xi:include href="plugin-kotlin-extensions.xml" xpointer="xpointer(/idea-plugin/*)"/>
 
-  <extensions defaultExtensionNs="org.jetbrains.kotlin">
-    <pluginUpdateVerifier implementation="org.jetbrains.kotlin.idea.update.GooglePluginUpdateVerifier"/>
-  </extensions>
-
   <extensions defaultExtensionNs="com.intellij.jvm">
     <declarationSearcher language="kotlin" implementationClass="org.jetbrains.kotlin.idea.jvm.KotlinDeclarationSearcher"/>
   </extensions>
 
   <extensions defaultExtensionNs="com.intellij">
+    <applicationService serviceImplementation="org.jetbrains.kotlin.idea.PluginStartupService" />
+    <postStartupActivity implementation="org.jetbrains.kotlin.idea.PluginStartupActivity"/>
+    <postStartupActivity implementation="org.jetbrains.kotlin.idea.completion.LookupCancelWatcher"/>
+    <postStartupActivity implementation="org.jetbrains.kotlin.idea.caches.KotlinPackageContentModificationListener"/>
+    <postStartupActivity implementation="org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectComponent"/>
+
+    <projectService serviceImplementation="org.jetbrains.kotlin.idea.completion.LookupCancelService"/>
+    <projectService serviceImplementation="org.jetbrains.kotlin.idea.configuration.KotlinMigrationProjectService"/>
+
+    <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.highlighter.KotlinBeforeResolveHighlightingPass$Registrar"/>
+    <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.highlighter.ScriptExternalHighlightingPass$Registrar"/>
+    <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.parameterInfo.custom.KotlinCodeHintsPass$Registrar"/>
+    <highlightingPassFactory implementation="org.jetbrains.kotlin.idea.refactoring.cutPaste.MoveDeclarationsPassFactory$Registrar"/>
+
     <fileTypeUsageSchemaDescriptor schema="Gradle Script" implementationClass="org.jetbrains.kotlin.idea.core.script.KotlinGradleScriptFileTypeSchemaDetector"/>
     <completion.ml.model implementation="org.jetbrains.kotlin.idea.completion.ml.KotlinMLRankingProvider"/>
   </extensions>
+
+  <extensions defaultExtensionNs="org.jetbrains.kotlin">
+    <pluginUpdateVerifier implementation="org.jetbrains.kotlin.idea.update.GooglePluginUpdateVerifier"/>
+  </extensions>
 </idea-plugin>

idea/src/org/jetbrains/kotlin/idea/configuration/KotlinMigrationProjectComponent.kt

@@ -5,310 +5,17 @@
 
 package org.jetbrains.kotlin.idea.configuration
 
-import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.externalSystem.service.project.manage.ProjectDataImportListener
-import com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil
-import com.intellij.openapi.module.Module
-import com.intellij.openapi.module.ModuleManager
 import com.intellij.openapi.project.Project
-import com.intellij.openapi.roots.ProjectRootManager
-import com.intellij.openapi.roots.libraries.Library
-import com.intellij.openapi.vcs.changes.ChangeListManager
-import com.intellij.openapi.vcs.ex.ProjectLevelVcsManagerEx
-import com.intellij.util.CommonProcessors
-import com.intellij.util.text.VersionComparatorUtil
-import org.jetbrains.annotations.TestOnly
-import org.jetbrains.kotlin.config.ApiVersion
-import org.jetbrains.kotlin.config.LanguageVersion
-import org.jetbrains.kotlin.config.LanguageVersionSettings
-import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl
-import org.jetbrains.kotlin.idea.configuration.ui.showMigrationNotification
-import org.jetbrains.kotlin.idea.facet.KotlinFacet
-import org.jetbrains.kotlin.idea.framework.GRADLE_SYSTEM_ID
-import org.jetbrains.kotlin.idea.framework.MAVEN_SYSTEM_ID
-import org.jetbrains.kotlin.idea.migration.CodeMigrationToggleAction
-import org.jetbrains.kotlin.idea.migration.applicableMigrationTools
-import org.jetbrains.kotlin.idea.project.languageVersionSettings
-import org.jetbrains.kotlin.idea.util.application.runReadAction
-import org.jetbrains.kotlin.idea.util.runReadActionInSmartMode
-import org.jetbrains.kotlin.idea.versions.LibInfo
-import java.io.File
+import com.intellij.openapi.startup.StartupActivity
 
-class KotlinMigrationProjectComponent(val project: Project) {
-    @Volatile
-    private var old: MigrationState? = null
+class KotlinMigrationProjectComponent : StartupActivity {
 
-    @Volatile
-    private var importFinishListener: ((MigrationTestState?) -> Unit)? = null
-
-    init {
-        val connection = project.messageBus.connect()
+    override fun runActivity(project: Project) {
+        val connection = project.messageBus.connect(project)
         connection.subscribe(ProjectDataImportListener.TOPIC, ProjectDataImportListener {
-            getInstanceIfNotDisposed(project)?.onImportFinished()
+            KotlinMigrationProjectService.getInstanceIfNotDisposed(project)?.onImportFinished()
         })
     }
 
-    class MigrationTestState(val migrationInfo: MigrationInfo?, val hasApplicableTools: Boolean)
-
-    @TestOnly
-    fun setImportFinishListener(newListener: ((MigrationTestState?) -> Unit)?) {
-        synchronized(this) {
-            if (newListener != null && importFinishListener != null) {
-                importFinishListener!!.invoke(null)
-            }
-
-            importFinishListener = newListener
-        }
-    }
-
-    private fun notifyFinish(migrationInfo: MigrationInfo?, hasApplicableTools: Boolean) {
-        importFinishListener?.invoke(MigrationTestState(migrationInfo, hasApplicableTools))
-    }
-
-    fun onImportAboutToStart() {
-        if (!CodeMigrationToggleAction.isEnabled(project) || !hasChangesInProjectFiles(project)) {
-            old = null
-            return
-        }
-
-        old = MigrationState.build(project)
-    }
-
-    fun onImportFinished() {
-        if (!CodeMigrationToggleAction.isEnabled(project) || old == null) {
-            notifyFinish(null, false)
-            return
-        }
-
-        ApplicationManager.getApplication().executeOnPooledThread {
-            var migrationInfo: MigrationInfo? = null
-            var hasApplicableTools = false
-
-            try {
-                val new = project.runReadActionInSmartMode {
-                    MigrationState.build(project)
-                }
-
-                val localOld = old.also {
-                    old = null
-                } ?: return@executeOnPooledThread
-
-                migrationInfo = prepareMigrationInfo(localOld, new) ?: return@executeOnPooledThread
-
-                if (applicableMigrationTools(migrationInfo).isEmpty()) {
-                    hasApplicableTools = false
-                    return@executeOnPooledThread
-                } else {
-                    hasApplicableTools = true
-                }
-
-                if (ApplicationManager.getApplication().isUnitTestMode) {
-                    return@executeOnPooledThread
-                }
-
-                ApplicationManager.getApplication().invokeLater {
-                    showMigrationNotification(project, migrationInfo)
-                }
-            } finally {
-                notifyFinish(migrationInfo, hasApplicableTools)
-            }
-        }
-    }
-
-    companion object {
-        fun getInstanceIfNotDisposed(project: Project): KotlinMigrationProjectComponent? {
-            return runReadAction {
-                if (!project.isDisposed) {
-                    project.getComponent(KotlinMigrationProjectComponent::class.java)
-                        ?: error("Can't find ${KotlinMigrationProjectComponent::class.qualifiedName} component")
-                } else {
-                    null
-                }
-            }
-        }
-
-        private fun prepareMigrationInfo(old: MigrationState?, new: MigrationState?): MigrationInfo? {
-            if (old == null || new == null) {
-                return null
-            }
-
-            val oldLibraryVersion = old.stdlibInfo?.version
-            val newLibraryVersion = new.stdlibInfo?.version
-
-            if (oldLibraryVersion == null || newLibraryVersion == null) {
-                return null
-            }
-
-            if (VersionComparatorUtil.COMPARATOR.compare(newLibraryVersion, oldLibraryVersion) > 0 ||
-                old.apiVersion < new.apiVersion || old.languageVersion < new.languageVersion
-            ) {
-                return MigrationInfo(
-                    oldLibraryVersion, newLibraryVersion,
-                    old.apiVersion, new.apiVersion,
-                    old.languageVersion, new.languageVersion
-                )
-            }
-
-            return null
-        }
-
-        private fun hasChangesInProjectFiles(project: Project): Boolean {
-            if (ProjectLevelVcsManagerEx.getInstance(project).allVcsRoots.isEmpty()) {
-                return true
-            }
-
-            val checkedFiles = HashSet<File>()
-
-            project.basePath?.let { projectBasePath ->
-                checkedFiles.add(File(projectBasePath))
-            }
-
-            val changedFiles = ChangeListManager.getInstance(project).affectedPaths
-            for (changedFile in changedFiles) {
-                when (changedFile.extension) {
-                    "gradle" -> return true
-                    "properties" -> return true
-                    "kts" -> return true
-                    "iml" -> return true
-                    "xml" -> {
-                        if (changedFile.name == "pom.xml") return true
-                        val parentDir = changedFile.parentFile
-                        if (parentDir.isDirectory && parentDir.name == Project.DIRECTORY_STORE_FOLDER) {
-                            return true
-                        }
-                    }
-                    "kt", "java", "groovy" -> {
-                        val dirs: Sequence<File> = generateSequence(changedFile) { it.parentFile }
-                            .drop(1) // Drop original file
-                            .takeWhile { it.isDirectory }
-
-                        val isInBuildSrc = dirs
-                            .takeWhile { checkedFiles.add(it) }
-                            .any { it.name == BUILD_SRC_FOLDER_NAME }
-
-                        if (isInBuildSrc) {
-                            return true
-                        }
-                    }
-                }
-            }
-
-            return false
-        }
-    }
 }
-
-private class MigrationState(
-    var stdlibInfo: LibInfo?,
-    var apiVersion: ApiVersion,
-    var languageVersion: LanguageVersion
-) {
-    companion object {
-        fun build(project: Project): MigrationState {
-            val libraries = maxKotlinLibVersion(project)
-            val languageVersionSettings = collectMaxCompilerSettings(project)
-            return MigrationState(libraries, languageVersionSettings.apiVersion, languageVersionSettings.languageVersion)
-        }
-    }
-}
-
-data class MigrationInfo(
-    val oldStdlibVersion: String,
-    val newStdlibVersion: String,
-    val oldApiVersion: ApiVersion,
-    val newApiVersion: ApiVersion,
-    val oldLanguageVersion: LanguageVersion,
-    val newLanguageVersion: LanguageVersion
-) {
-    companion object {
-        fun create(
-            oldStdlibVersion: String,
-            oldApiVersion: ApiVersion,
-            oldLanguageVersion: LanguageVersion,
-            newStdlibVersion: String = oldStdlibVersion,
-            newApiVersion: ApiVersion = oldApiVersion,
-            newLanguageVersion: LanguageVersion = oldLanguageVersion
-        ): MigrationInfo {
-            return MigrationInfo(
-                oldStdlibVersion, newStdlibVersion,
-                oldApiVersion, newApiVersion,
-                oldLanguageVersion, newLanguageVersion
-            )
-        }
-    }
-}
-
-fun MigrationInfo.isLanguageVersionUpdate(old: LanguageVersion, new: LanguageVersion): Boolean {
-    return oldLanguageVersion <= old && newLanguageVersion >= new
-}
-
-
-private const val BUILD_SRC_FOLDER_NAME = "buildSrc"
-private const val KOTLIN_GROUP_ID = "org.jetbrains.kotlin"
-
-private fun maxKotlinLibVersion(project: Project): LibInfo? {
-    return runReadAction {
-        var maxStdlibInfo: LibInfo? = null
-
-        val allLibProcessor = CommonProcessors.CollectUniquesProcessor<Library>()
-        ProjectRootManager.getInstance(project).orderEntries().forEachLibrary(allLibProcessor)
-
-        for (library in allLibProcessor.results) {
-            if (!ExternalSystemApiUtil.isExternalSystemLibrary(library, GRADLE_SYSTEM_ID) &&
-                !ExternalSystemApiUtil.isExternalSystemLibrary(library, MAVEN_SYSTEM_ID)
-            ) {
-                continue
-            }
-
-            if (library.name?.contains(" $KOTLIN_GROUP_ID:kotlin-stdlib") != true) {
-                continue
-            }
-
-            val libraryInfo = parseExternalLibraryName(library) ?: continue
-
-            if (maxStdlibInfo == null || VersionComparatorUtil.COMPARATOR.compare(libraryInfo.version, maxStdlibInfo.version) > 0) {
-                maxStdlibInfo = LibInfo(KOTLIN_GROUP_ID, libraryInfo.artifactId, libraryInfo.version)
-            }
-        }
-
-        maxStdlibInfo
-    }
-}
-
-private fun collectMaxCompilerSettings(project: Project): LanguageVersionSettings {
-    return runReadAction {
-        var maxApiVersion: ApiVersion? = null
-        var maxLanguageVersion: LanguageVersion? = null
-
-        for (module in ModuleManager.getInstance(project).modules) {
-            if (!module.isKotlinModule()) {
-                // Otherwise project compiler settings will give unreliable maximum for compiler settings
-                continue
-            }
-
-            val languageVersionSettings = module.languageVersionSettings
-
-            if (maxApiVersion == null || languageVersionSettings.apiVersion > maxApiVersion) {
-                maxApiVersion = languageVersionSettings.apiVersion
-            }
-
-            if (maxLanguageVersion == null || languageVersionSettings.languageVersion > maxLanguageVersion) {
-                maxLanguageVersion = languageVersionSettings.languageVersion
-            }
-        }
-
-        LanguageVersionSettingsImpl(maxLanguageVersion ?: LanguageVersion.LATEST_STABLE, maxApiVersion ?: ApiVersion.LATEST_STABLE)
-    }
-}
-
-private fun Module.isKotlinModule(): Boolean {
-    if (isDisposed) return false
-
-    if (KotlinFacet.get(this) != null) {
-        return true
-    }
-
-    // This code works only for Maven and Gradle import, and it's expected that Kotlin facets are configured for
-    // all modules with external system.
-    return false
-}

idea/src/org/jetbrains/kotlin/idea/configuration/KotlinMigrationProjectComponent.kt.192

@@ -0,0 +1,314 @@
+/*
+ * Copyright 2010-2018 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.configuration
+
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.externalSystem.service.project.manage.ProjectDataImportListener
+import com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil
+import com.intellij.openapi.module.Module
+import com.intellij.openapi.module.ModuleManager
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.roots.ProjectRootManager
+import com.intellij.openapi.roots.libraries.Library
+import com.intellij.openapi.vcs.changes.ChangeListManager
+import com.intellij.openapi.vcs.ex.ProjectLevelVcsManagerEx
+import com.intellij.util.CommonProcessors
+import com.intellij.util.text.VersionComparatorUtil
+import org.jetbrains.annotations.TestOnly
+import org.jetbrains.kotlin.config.ApiVersion
+import org.jetbrains.kotlin.config.LanguageVersion
+import org.jetbrains.kotlin.config.LanguageVersionSettings
+import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl
+import org.jetbrains.kotlin.idea.configuration.ui.showMigrationNotification
+import org.jetbrains.kotlin.idea.facet.KotlinFacet
+import org.jetbrains.kotlin.idea.framework.GRADLE_SYSTEM_ID
+import org.jetbrains.kotlin.idea.framework.MAVEN_SYSTEM_ID
+import org.jetbrains.kotlin.idea.migration.CodeMigrationToggleAction
+import org.jetbrains.kotlin.idea.migration.applicableMigrationTools
+import org.jetbrains.kotlin.idea.project.languageVersionSettings
+import org.jetbrains.kotlin.idea.util.application.runReadAction
+import org.jetbrains.kotlin.idea.util.runReadActionInSmartMode
+import org.jetbrains.kotlin.idea.versions.LibInfo
+import java.io.File
+
+class KotlinMigrationProjectComponent(val project: Project) {
+    @Volatile
+    private var old: MigrationState? = null
+
+    @Volatile
+    private var importFinishListener: ((MigrationTestState?) -> Unit)? = null
+
+    init {
+        val connection = project.messageBus.connect(project)
+        connection.subscribe(ProjectDataImportListener.TOPIC, ProjectDataImportListener {
+            getInstanceIfNotDisposed(project)?.onImportFinished()
+        })
+    }
+
+    class MigrationTestState(val migrationInfo: MigrationInfo?, val hasApplicableTools: Boolean)
+
+    @TestOnly
+    fun setImportFinishListener(newListener: ((MigrationTestState?) -> Unit)?) {
+        synchronized(this) {
+            if (newListener != null && importFinishListener != null) {
+                importFinishListener!!.invoke(null)
+            }
+
+            importFinishListener = newListener
+        }
+    }
+
+    private fun notifyFinish(migrationInfo: MigrationInfo?, hasApplicableTools: Boolean) {
+        importFinishListener?.invoke(MigrationTestState(migrationInfo, hasApplicableTools))
+    }
+
+    fun onImportAboutToStart() {
+        if (!CodeMigrationToggleAction.isEnabled(project) || !hasChangesInProjectFiles(project)) {
+            old = null
+            return
+        }
+
+        old = MigrationState.build(project)
+    }
+
+    fun onImportFinished() {
+        if (!CodeMigrationToggleAction.isEnabled(project) || old == null) {
+            notifyFinish(null, false)
+            return
+        }
+
+        ApplicationManager.getApplication().executeOnPooledThread {
+            var migrationInfo: MigrationInfo? = null
+            var hasApplicableTools = false
+
+            try {
+                val new = project.runReadActionInSmartMode {
+                    MigrationState.build(project)
+                }
+
+                val localOld = old.also {
+                    old = null
+                } ?: return@executeOnPooledThread
+
+                migrationInfo = prepareMigrationInfo(localOld, new) ?: return@executeOnPooledThread
+
+                if (applicableMigrationTools(migrationInfo).isEmpty()) {
+                    hasApplicableTools = false
+                    return@executeOnPooledThread
+                } else {
+                    hasApplicableTools = true
+                }
+
+                if (ApplicationManager.getApplication().isUnitTestMode) {
+                    return@executeOnPooledThread
+                }
+
+                ApplicationManager.getApplication().invokeLater {
+                    showMigrationNotification(project, migrationInfo)
+                }
+            } finally {
+                notifyFinish(migrationInfo, hasApplicableTools)
+            }
+        }
+    }
+
+    companion object {
+        fun getInstanceIfNotDisposed(project: Project): KotlinMigrationProjectComponent? {
+            return runReadAction {
+                if (!project.isDisposed) {
+                    project.getComponent(KotlinMigrationProjectComponent::class.java)
+                        ?: error("Can't find ${KotlinMigrationProjectComponent::class.qualifiedName} component")
+                } else {
+                    null
+                }
+            }
+        }
+
+        private fun prepareMigrationInfo(old: MigrationState?, new: MigrationState?): MigrationInfo? {
+            if (old == null || new == null) {
+                return null
+            }
+
+            val oldLibraryVersion = old.stdlibInfo?.version
+            val newLibraryVersion = new.stdlibInfo?.version
+
+            if (oldLibraryVersion == null || newLibraryVersion == null) {
+                return null
+            }
+
+            if (VersionComparatorUtil.COMPARATOR.compare(newLibraryVersion, oldLibraryVersion) > 0 ||
+                old.apiVersion < new.apiVersion || old.languageVersion < new.languageVersion
+            ) {
+                return MigrationInfo(
+                    oldLibraryVersion, newLibraryVersion,
+                    old.apiVersion, new.apiVersion,
+                    old.languageVersion, new.languageVersion
+                )
+            }
+
+            return null
+        }
+
+        private fun hasChangesInProjectFiles(project: Project): Boolean {
+            if (ProjectLevelVcsManagerEx.getInstance(project).allVcsRoots.isEmpty()) {
+                return true
+            }
+
+            val checkedFiles = HashSet<File>()
+
+            project.basePath?.let { projectBasePath ->
+                checkedFiles.add(File(projectBasePath))
+            }
+
+            val changedFiles = ChangeListManager.getInstance(project).affectedPaths
+            for (changedFile in changedFiles) {
+                when (changedFile.extension) {
+                    "gradle" -> return true
+                    "properties" -> return true
+                    "kts" -> return true
+                    "iml" -> return true
+                    "xml" -> {
+                        if (changedFile.name == "pom.xml") return true
+                        val parentDir = changedFile.parentFile
+                        if (parentDir.isDirectory && parentDir.name == Project.DIRECTORY_STORE_FOLDER) {
+                            return true
+                        }
+                    }
+                    "kt", "java", "groovy" -> {
+                        val dirs: Sequence<File> = generateSequence(changedFile) { it.parentFile }
+                            .drop(1) // Drop original file
+                            .takeWhile { it.isDirectory }
+
+                        val isInBuildSrc = dirs
+                            .takeWhile { checkedFiles.add(it) }
+                            .any { it.name == BUILD_SRC_FOLDER_NAME }
+
+                        if (isInBuildSrc) {
+                            return true
+                        }
+                    }
+                }
+            }
+
+            return false
+        }
+    }
+}
+
+private class MigrationState(
+    var stdlibInfo: LibInfo?,
+    var apiVersion: ApiVersion,
+    var languageVersion: LanguageVersion
+) {
+    companion object {
+        fun build(project: Project): MigrationState {
+            val libraries = maxKotlinLibVersion(project)
+            val languageVersionSettings = collectMaxCompilerSettings(project)
+            return MigrationState(libraries, languageVersionSettings.apiVersion, languageVersionSettings.languageVersion)
+        }
+    }
+}
+
+data class MigrationInfo(
+    val oldStdlibVersion: String,
+    val newStdlibVersion: String,
+    val oldApiVersion: ApiVersion,
+    val newApiVersion: ApiVersion,
+    val oldLanguageVersion: LanguageVersion,
+    val newLanguageVersion: LanguageVersion
+) {
+    companion object {
+        fun create(
+            oldStdlibVersion: String,
+            oldApiVersion: ApiVersion,
+            oldLanguageVersion: LanguageVersion,
+            newStdlibVersion: String = oldStdlibVersion,
+            newApiVersion: ApiVersion = oldApiVersion,
+            newLanguageVersion: LanguageVersion = oldLanguageVersion
+        ): MigrationInfo {
+            return MigrationInfo(
+                oldStdlibVersion, newStdlibVersion,
+                oldApiVersion, newApiVersion,
+                oldLanguageVersion, newLanguageVersion
+            )
+        }
+    }
+}
+
+fun MigrationInfo.isLanguageVersionUpdate(old: LanguageVersion, new: LanguageVersion): Boolean {
+    return oldLanguageVersion <= old && newLanguageVersion >= new
+}
+
+
+private const val BUILD_SRC_FOLDER_NAME = "buildSrc"
+private const val KOTLIN_GROUP_ID = "org.jetbrains.kotlin"
+
+private fun maxKotlinLibVersion(project: Project): LibInfo? {
+    return runReadAction {
+        var maxStdlibInfo: LibInfo? = null
+
+        val allLibProcessor = CommonProcessors.CollectUniquesProcessor<Library>()
+        ProjectRootManager.getInstance(project).orderEntries().forEachLibrary(allLibProcessor)
+
+        for (library in allLibProcessor.results) {
+            if (!ExternalSystemApiUtil.isExternalSystemLibrary(library, GRADLE_SYSTEM_ID) &&
+                !ExternalSystemApiUtil.isExternalSystemLibrary(library, MAVEN_SYSTEM_ID)
+            ) {
+                continue
+            }
+
+            if (library.name?.contains(" $KOTLIN_GROUP_ID:kotlin-stdlib") != true) {
+                continue
+            }
+
+            val libraryInfo = parseExternalLibraryName(library) ?: continue
+
+            if (maxStdlibInfo == null || VersionComparatorUtil.COMPARATOR.compare(libraryInfo.version, maxStdlibInfo.version) > 0) {
+                maxStdlibInfo = LibInfo(KOTLIN_GROUP_ID, libraryInfo.artifactId, libraryInfo.version)
+            }
+        }
+
+        maxStdlibInfo
+    }
+}
+
+private fun collectMaxCompilerSettings(project: Project): LanguageVersionSettings {
+    return runReadAction {
+        var maxApiVersion: ApiVersion? = null
+        var maxLanguageVersion: LanguageVersion? = null
+
+        for (module in ModuleManager.getInstance(project).modules) {
+            if (!module.isKotlinModule()) {
+                // Otherwise project compiler settings will give unreliable maximum for compiler settings
+                continue
+            }
+
+            val languageVersionSettings = module.languageVersionSettings
+
+            if (maxApiVersion == null || languageVersionSettings.apiVersion > maxApiVersion) {
+                maxApiVersion = languageVersionSettings.apiVersion
+            }
+
+            if (maxLanguageVersion == null || languageVersionSettings.languageVersion > maxLanguageVersion) {
+                maxLanguageVersion = languageVersionSettings.languageVersion
+            }
+        }
+
+        LanguageVersionSettingsImpl(maxLanguageVersion ?: LanguageVersion.LATEST_STABLE, maxApiVersion ?: ApiVersion.LATEST_STABLE)
+    }
+}
+
+private fun Module.isKotlinModule(): Boolean {
+    if (isDisposed) return false
+
+    if (KotlinFacet.get(this) != null) {
+        return true
+    }
+
+    // This code works only for Maven and Gradle import, and it's expected that Kotlin facets are configured for
+    // all modules with external system.
+    return false
+}

idea/src/org/jetbrains/kotlin/idea/configuration/KotlinMigrationProjectService.kt

@@ -0,0 +1,308 @@
+/*
+ * Copyright 2010-2018 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.configuration
+
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil
+import com.intellij.openapi.module.Module
+import com.intellij.openapi.module.ModuleManager
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.roots.ProjectRootManager
+import com.intellij.openapi.roots.libraries.Library
+import com.intellij.openapi.vcs.changes.ChangeListManager
+import com.intellij.openapi.vcs.ex.ProjectLevelVcsManagerEx
+import com.intellij.util.CommonProcessors
+import com.intellij.util.text.VersionComparatorUtil
+import org.jetbrains.annotations.TestOnly
+import org.jetbrains.kotlin.config.ApiVersion
+import org.jetbrains.kotlin.config.LanguageVersion
+import org.jetbrains.kotlin.config.LanguageVersionSettings
+import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl
+import org.jetbrains.kotlin.idea.configuration.ui.showMigrationNotification
+import org.jetbrains.kotlin.idea.facet.KotlinFacet
+import org.jetbrains.kotlin.idea.framework.GRADLE_SYSTEM_ID
+import org.jetbrains.kotlin.idea.framework.MAVEN_SYSTEM_ID
+import org.jetbrains.kotlin.idea.migration.CodeMigrationToggleAction
+import org.jetbrains.kotlin.idea.migration.applicableMigrationTools
+import org.jetbrains.kotlin.idea.project.languageVersionSettings
+import org.jetbrains.kotlin.idea.util.application.getServiceSafe
+import org.jetbrains.kotlin.idea.util.application.runReadAction
+import org.jetbrains.kotlin.idea.util.runReadActionInSmartMode
+import org.jetbrains.kotlin.idea.versions.LibInfo
+import java.io.File
+
+typealias MigrationTestState = KotlinMigrationProjectService.MigrationTestState
+
+class KotlinMigrationProjectService(val project: Project) {
+    @Volatile
+    private var old: MigrationState? = null
+
+    @Volatile
+    private var importFinishListener: ((MigrationTestState?) -> Unit)? = null
+
+    class MigrationTestState(val migrationInfo: MigrationInfo?, val hasApplicableTools: Boolean)
+
+    @TestOnly
+    fun setImportFinishListener(newListener: ((MigrationTestState?) -> Unit)?) {
+        synchronized(this) {
+            if (newListener != null && importFinishListener != null) {
+                importFinishListener!!.invoke(null)
+            }
+
+            importFinishListener = newListener
+        }
+    }
+
+    private fun notifyFinish(migrationInfo: MigrationInfo?, hasApplicableTools: Boolean) {
+        importFinishListener?.invoke(MigrationTestState(migrationInfo, hasApplicableTools))
+    }
+
+    fun onImportAboutToStart() {
+        if (!CodeMigrationToggleAction.isEnabled(project) || !hasChangesInProjectFiles(project)) {
+            old = null
+            return
+        }
+
+        old = MigrationState.build(project)
+    }
+
+    fun onImportFinished() {
+        if (!CodeMigrationToggleAction.isEnabled(project) || old == null) {
+            notifyFinish(null, false)
+            return
+        }
+
+        ApplicationManager.getApplication().executeOnPooledThread {
+            var migrationInfo: MigrationInfo? = null
+            var hasApplicableTools = false
+
+            try {
+                val new = project.runReadActionInSmartMode {
+                    MigrationState.build(project)
+                }
+
+                val localOld = old.also {
+                    old = null
+                } ?: return@executeOnPooledThread
+
+                migrationInfo = prepareMigrationInfo(localOld, new) ?: return@executeOnPooledThread
+
+                if (applicableMigrationTools(migrationInfo).isEmpty()) {
+                    hasApplicableTools = false
+                    return@executeOnPooledThread
+                } else {
+                    hasApplicableTools = true
+                }
+
+                if (ApplicationManager.getApplication().isUnitTestMode) {
+                    return@executeOnPooledThread
+                }
+
+                ApplicationManager.getApplication().invokeLater {
+                    showMigrationNotification(project, migrationInfo)
+                }
+            } finally {
+                notifyFinish(migrationInfo, hasApplicableTools)
+            }
+        }
+    }
+
+    companion object {
+        fun getInstanceIfNotDisposed(project: Project): KotlinMigrationProjectService? {
+            return runReadAction {
+                if (!project.isDisposed) {
+                    project.getServiceSafe(KotlinMigrationProjectService::class.java)
+                } else {
+                    null
+                }
+            }
+        }
+
+        private fun prepareMigrationInfo(old: MigrationState?, new: MigrationState?): MigrationInfo? {
+            if (old == null || new == null) {
+                return null
+            }
+
+            val oldLibraryVersion = old.stdlibInfo?.version
+            val newLibraryVersion = new.stdlibInfo?.version
+
+            if (oldLibraryVersion == null || newLibraryVersion == null) {
+                return null
+            }
+
+            if (VersionComparatorUtil.COMPARATOR.compare(newLibraryVersion, oldLibraryVersion) > 0 ||
+                old.apiVersion < new.apiVersion || old.languageVersion < new.languageVersion
+            ) {
+                return MigrationInfo(
+                    oldLibraryVersion, newLibraryVersion,
+                    old.apiVersion, new.apiVersion,
+                    old.languageVersion, new.languageVersion
+                )
+            }
+
+            return null
+        }
+
+        private fun hasChangesInProjectFiles(project: Project): Boolean {
+            if (ProjectLevelVcsManagerEx.getInstance(project).allVcsRoots.isEmpty()) {
+                return true
+            }
+
+            val checkedFiles = HashSet<File>()
+
+            project.basePath?.let { projectBasePath ->
+                checkedFiles.add(File(projectBasePath))
+            }
+
+            val changedFiles = ChangeListManager.getInstance(project).affectedPaths
+            for (changedFile in changedFiles) {
+                when (changedFile.extension) {
+                    "gradle" -> return true
+                    "properties" -> return true
+                    "kts" -> return true
+                    "iml" -> return true
+                    "xml" -> {
+                        if (changedFile.name == "pom.xml") return true
+                        val parentDir = changedFile.parentFile
+                        if (parentDir.isDirectory && parentDir.name == Project.DIRECTORY_STORE_FOLDER) {
+                            return true
+                        }
+                    }
+                    "kt", "java", "groovy" -> {
+                        val dirs: Sequence<File> = generateSequence(changedFile) { it.parentFile }
+                            .drop(1) // Drop original file
+                            .takeWhile { it.isDirectory }
+
+                        val isInBuildSrc = dirs
+                            .takeWhile { checkedFiles.add(it) }
+                            .any { it.name == BUILD_SRC_FOLDER_NAME }
+
+                        if (isInBuildSrc) {
+                            return true
+                        }
+                    }
+                }
+            }
+
+            return false
+        }
+    }
+}
+
+private class MigrationState(
+    var stdlibInfo: LibInfo?,
+    var apiVersion: ApiVersion,
+    var languageVersion: LanguageVersion
+) {
+    companion object {
+        fun build(project: Project): MigrationState {
+            val libraries = maxKotlinLibVersion(project)
+            val languageVersionSettings = collectMaxCompilerSettings(project)
+            return MigrationState(libraries, languageVersionSettings.apiVersion, languageVersionSettings.languageVersion)
+        }
+    }
+}
+
+data class MigrationInfo(
+    val oldStdlibVersion: String,
+    val newStdlibVersion: String,
+    val oldApiVersion: ApiVersion,
+    val newApiVersion: ApiVersion,
+    val oldLanguageVersion: LanguageVersion,
+    val newLanguageVersion: LanguageVersion
+) {
+    companion object {
+        fun create(
+            oldStdlibVersion: String,
+            oldApiVersion: ApiVersion,
+            oldLanguageVersion: LanguageVersion,
+            newStdlibVersion: String = oldStdlibVersion,
+            newApiVersion: ApiVersion = oldApiVersion,
+            newLanguageVersion: LanguageVersion = oldLanguageVersion
+        ): MigrationInfo {
+            return MigrationInfo(
+                oldStdlibVersion, newStdlibVersion,
+                oldApiVersion, newApiVersion,
+                oldLanguageVersion, newLanguageVersion
+            )
+        }
+    }
+}
+
+fun MigrationInfo.isLanguageVersionUpdate(old: LanguageVersion, new: LanguageVersion): Boolean {
+    return oldLanguageVersion <= old && newLanguageVersion >= new
+}
+
+
+private const val BUILD_SRC_FOLDER_NAME = "buildSrc"
+private const val KOTLIN_GROUP_ID = "org.jetbrains.kotlin"
+
+private fun maxKotlinLibVersion(project: Project): LibInfo? {
+    return runReadAction {
+        var maxStdlibInfo: LibInfo? = null
+
+        val allLibProcessor = CommonProcessors.CollectUniquesProcessor<Library>()
+        ProjectRootManager.getInstance(project).orderEntries().forEachLibrary(allLibProcessor)
+
+        for (library in allLibProcessor.results) {
+            if (!ExternalSystemApiUtil.isExternalSystemLibrary(library, GRADLE_SYSTEM_ID) &&
+                !ExternalSystemApiUtil.isExternalSystemLibrary(library, MAVEN_SYSTEM_ID)
+            ) {
+                continue
+            }
+
+            if (library.name?.contains(" $KOTLIN_GROUP_ID:kotlin-stdlib") != true) {
+                continue
+            }
+
+            val libraryInfo = parseExternalLibraryName(library) ?: continue
+
+            if (maxStdlibInfo == null || VersionComparatorUtil.COMPARATOR.compare(libraryInfo.version, maxStdlibInfo.version) > 0) {
+                maxStdlibInfo = LibInfo(KOTLIN_GROUP_ID, libraryInfo.artifactId, libraryInfo.version)
+            }
+        }
+
+        maxStdlibInfo
+    }
+}
+
+private fun collectMaxCompilerSettings(project: Project): LanguageVersionSettings {
+    return runReadAction {
+        var maxApiVersion: ApiVersion? = null
+        var maxLanguageVersion: LanguageVersion? = null
+
+        for (module in ModuleManager.getInstance(project).modules) {
+            if (!module.isKotlinModule()) {
+                // Otherwise project compiler settings will give unreliable maximum for compiler settings
+                continue
+            }
+
+            val languageVersionSettings = module.languageVersionSettings
+
+            if (maxApiVersion == null || languageVersionSettings.apiVersion > maxApiVersion) {
+                maxApiVersion = languageVersionSettings.apiVersion
+            }
+
+            if (maxLanguageVersion == null || languageVersionSettings.languageVersion > maxLanguageVersion) {
+                maxLanguageVersion = languageVersionSettings.languageVersion
+            }
+        }
+
+        LanguageVersionSettingsImpl(maxLanguageVersion ?: LanguageVersion.LATEST_STABLE, maxApiVersion ?: ApiVersion.LATEST_STABLE)
+    }
+}
+
+private fun Module.isKotlinModule(): Boolean {
+    if (isDisposed) return false
+
+    if (KotlinFacet.get(this) != null) {
+        return true
+    }
+
+    // This code works only for Maven and Gradle import, and it's expected that Kotlin facets are configured for
+    // all modules with external system.
+    return false
+}

idea/src/org/jetbrains/kotlin/idea/configuration/KotlinMigrationProjectService.kt.192

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2010-2018 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.configuration
+
+// BUNCH: 192
+typealias KotlinMigrationProjectService = KotlinMigrationProjectComponent
+typealias MigrationTestState = KotlinMigrationProjectComponent.MigrationTestState

idea/src/org/jetbrains/kotlin/idea/parameterInfo/custom/KotlinCodeHintsModel.kt

@@ -17,14 +17,14 @@ import com.intellij.psi.PsiElement
 import com.intellij.util.containers.ContainerUtil
 import org.jetbrains.kotlin.idea.core.util.end
 import org.jetbrains.kotlin.idea.core.util.range
+import org.jetbrains.kotlin.idea.util.application.getServiceSafe
 import org.jetbrains.kotlin.idea.util.application.runReadAction
 import org.jetbrains.kotlin.psi.psiUtil.endOffset
 import java.util.concurrent.ConcurrentHashMap
 
 class KotlinCodeHintsModel(val project: Project) : EditorFactoryListener {
     companion object {
-        fun getInstance(project: Project): KotlinCodeHintsModel =
-            project.getComponent(KotlinCodeHintsModel::class.java) ?: error("Component `KotlinCodeHintsModel` is expected to be registered")
+        fun getInstance(project: Project): KotlinCodeHintsModel = project.getServiceSafe(KotlinCodeHintsModel::class.java)
     }
 
     private class DocumentExtensionInfoModel(val document: Document) {

idea/tests/org/jetbrains/kotlin/idea/resolve/AbstractAdditionalResolveDescriptorRendererTest.kt

@@ -9,7 +9,6 @@ import com.intellij.mock.MockProject
 import com.intellij.pom.PomModel
 import com.intellij.pom.core.impl.PomModelImpl
 import com.intellij.pom.tree.TreeAspect
-import com.intellij.psi.util.PsiModificationTracker
 import org.jetbrains.kotlin.container.ComponentProvider
 import org.jetbrains.kotlin.container.get
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
@@ -33,19 +32,12 @@ abstract class AbstractAdditionalResolveDescriptorRendererTest : AbstractDescrip
         val pomModelImpl = PomModelImpl(project)
         val treeAspect = TreeAspect(pomModelImpl)
 
-        (project as MockProject).registerService(PomModel::class.java, pomModelImpl)
-        (project.picoContainer as MutablePicoContainer).registerComponentInstance(
-            KotlinCodeBlockModificationListener(
-                PsiModificationTracker.SERVICE.getInstance(project),
-                project,
-                treeAspect
-            )
-        )
+        val mockProject = project as MockProject
+        createAndRegisterKotlinCodeBlockModificationListener(mockProject, pomModelImpl, treeAspect)
     }
 
     override fun tearDown() {
-        (project.picoContainer as MutablePicoContainer).unregisterComponent(KotlinCodeBlockModificationListener::class.java)
-        (project.picoContainer as MutablePicoContainer).unregisterComponent(PomModel::class.java)
+        unregisterKotlinCodeBlockModificationListener(project as MockProject)
 
         super.tearDown()
     }

idea/tests/org/jetbrains/kotlin/idea/resolve/compat.kt

@@ -0,0 +1,29 @@
+/*
+ * 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.resolve
+
+import com.intellij.mock.MockProject
+import com.intellij.pom.PomModel
+import com.intellij.pom.tree.TreeAspect
+import com.intellij.psi.util.PsiModificationTracker
+import org.jetbrains.kotlin.idea.caches.trackers.KotlinCodeBlockModificationListener
+
+internal fun createAndRegisterKotlinCodeBlockModificationListener(project: MockProject, pomModel: PomModel, treeAspect: TreeAspect) {
+    project.registerService(PomModel::class.java, pomModel)
+    project.picoContainer.registerComponentInstance(
+        KotlinCodeBlockModificationListener(
+            PsiModificationTracker.SERVICE.getInstance(project),
+            project,
+            treeAspect
+        )
+    )
+}
+
+internal fun unregisterKotlinCodeBlockModificationListener(project: MockProject) {
+    val picoContainer = project.picoContainer
+    picoContainer.unregisterComponent(KotlinCodeBlockModificationListener::class.java)
+    picoContainer.unregisterComponent(PomModel::class.java)
+}

idea/tests/org/jetbrains/kotlin/idea/resolve/compat.kt.201

@@ -0,0 +1,23 @@
+/*
+ * 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.resolve
+
+import com.intellij.mock.MockProject
+import com.intellij.pom.PomModel
+import com.intellij.pom.tree.TreeAspect
+import org.jetbrains.kotlin.idea.caches.trackers.KotlinCodeBlockModificationListener
+
+internal fun createAndRegisterKotlinCodeBlockModificationListener(project: MockProject, pomModel: PomModel, treeAspect: TreeAspect) {
+    project.registerService(PomModel::class.java, pomModel)
+    project.registerService(TreeAspect::class.java, treeAspect)
+    project.registerService(KotlinCodeBlockModificationListener::class.java, KotlinCodeBlockModificationListener(project))
+}
+
+internal fun unregisterKotlinCodeBlockModificationListener(project: MockProject) {
+    val picoContainer = project.picoContainer
+    picoContainer.unregisterComponent(KotlinCodeBlockModificationListener::class.java)
+    picoContainer.unregisterComponent(PomModel::class.java)
+}