KT-12447 Don't use CompletionProgressIndicator in Kotlin plugin

#KT-12447 Fixed

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

@@ -23,8 +23,7 @@ import com.intellij.codeInsight.lookup.LookupElementBuilder
 import com.intellij.codeInsight.template.TemplateManager
 import com.intellij.patterns.PatternCondition
 import com.intellij.patterns.StandardPatterns
-import com.intellij.psi.JavaPsiFacade
-import com.intellij.psi.PsiClass
+import com.intellij.psi.*
 import com.intellij.psi.search.GlobalSearchScope
 import com.intellij.util.ProcessingContext
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
@@ -119,11 +118,28 @@ class BasicCompletionSession(
                 lookupElement.putUserData(LookupCancelWatcher.AUTO_POPUP_AT, position.startOffset)
                 lookupElement
             }
+
+            if (isInFunctionLiteralStart(position)) {
+                collector.addLookupElementPostProcessor { lookupElement ->
+                    lookupElement.putUserData(KotlinCompletionCharFilter.SUPPRESS_ITEM_SELECTION_BY_CHARS_ON_TYPING, Unit)
+                    lookupElement
+                }
+            }
         }
 
         completionKind.doComplete()
     }
 
+    private fun isInFunctionLiteralStart(position: PsiElement): Boolean {
+        var prev = position.prevLeaf { it !is PsiWhiteSpace && it !is PsiComment }
+        if (prev?.node?.elementType == KtTokens.LPAR) {
+            prev = prev?.prevLeaf { it !is PsiWhiteSpace && it !is PsiComment }
+        }
+        if (prev?.node?.elementType != KtTokens.LBRACE) return false
+        val functionLiteral = prev!!.parent as? KtFunctionLiteral ?: return false
+        return functionLiteral.lBrace == prev
+    }
+
     override fun createSorter(): CompletionSorter {
         var sorter = super.createSorter()
 

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

@@ -16,12 +16,9 @@
 
 package org.jetbrains.kotlin.idea.completion
 
-import com.intellij.codeInsight.completion.CompletionProgressIndicator
-import com.intellij.codeInsight.completion.CompletionService
 import com.intellij.codeInsight.completion.InsertionContext
 import com.intellij.codeInsight.completion.PrefixMatcher
 import com.intellij.codeInsight.lookup.*
-import com.intellij.openapi.progress.ProcessCanceledException
 import com.intellij.openapi.util.Key
 import com.intellij.patterns.ElementPattern
 import com.intellij.patterns.StandardPatterns
@@ -107,17 +104,6 @@ fun LookupElement.keepOldArgumentListOnTab(): LookupElement {
     return this
 }
 
-fun rethrowWithCancelIndicator(exception: ProcessCanceledException): ProcessCanceledException {
-    val indicator = CompletionService.getCompletionService().currentCompletion as CompletionProgressIndicator
-
-    // Force cancel to avoid deadlock in CompletionThreading.delegateWeighing()
-    if (!indicator.isCanceled) {
-        indicator.cancel()
-    }
-
-    return exception
-}
-
 fun PrefixMatcher.asNameFilter(): (Name) -> Boolean {
     return { name -> !name.isSpecial && prefixMatches(name.identifier) }
 }

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

@@ -16,19 +16,11 @@
 
 package org.jetbrains.kotlin.idea.completion
 
-import com.intellij.codeInsight.completion.CompletionProgressIndicator
 import com.intellij.codeInsight.completion.CompletionService
 import com.intellij.codeInsight.lookup.CharFilter
-import com.intellij.codeInsight.lookup.CharFilter.Result
 import com.intellij.codeInsight.lookup.Lookup
 import com.intellij.openapi.util.Key
-import com.intellij.psi.PsiComment
-import com.intellij.psi.PsiElement
-import com.intellij.psi.PsiWhiteSpace
-import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.psi.KtFile
-import org.jetbrains.kotlin.psi.KtFunctionLiteral
-import org.jetbrains.kotlin.psi.psiUtil.prevLeaf
 
 class KotlinCompletionCharFilter() : CharFilter() {
     companion object {
@@ -43,10 +35,7 @@ class KotlinCompletionCharFilter() : CharFilter() {
     override fun acceptChar(c : Char, prefixLength : Int, lookup : Lookup) : Result? {
         if (lookup.psiFile !is KtFile) return null
         if (!lookup.isCompletion) return null
-        // it does not work in tests, so we use other way
-//        val isAutopopup = CompletionService.getCompletionService().getCurrentCompletion().isAutopopupCompletion()
-        val completionParameters = (CompletionService.getCompletionService().currentCompletion as CompletionProgressIndicator).parameters
-        val isAutopopup = completionParameters.invocationCount == 0
+        val isAutopopup = CompletionService.getCompletionService().currentCompletion!!.isAutopopupCompletion
 
         if (Character.isJavaIdentifierPart(c) || c == '@') {
             return CharFilter.Result.ADD_TO_PREFIX
@@ -55,8 +44,7 @@ class KotlinCompletionCharFilter() : CharFilter() {
         val currentItem = lookup.currentItem
 
         // do not accept items by special chars in some special positions such as in the very beginning of function literal where name of the first parameter can be
-        if (isAutopopup && !lookup.isSelectionTouched
-            && (currentItem?.getUserData(SUPPRESS_ITEM_SELECTION_BY_CHARS_ON_TYPING) != null || isInFunctionLiteralStart(completionParameters.position))) {
+        if (isAutopopup && !lookup.isSelectionTouched && currentItem?.getUserData(SUPPRESS_ITEM_SELECTION_BY_CHARS_ON_TYPING) != null) {
             return Result.HIDE_LOOKUP
         }
 
@@ -94,14 +82,4 @@ class KotlinCompletionCharFilter() : CharFilter() {
             else -> CharFilter.Result.HIDE_LOOKUP
         }
     }
-
-    private fun isInFunctionLiteralStart(position: PsiElement): Boolean {
-        var prev = position.prevLeaf { it !is PsiWhiteSpace && it !is PsiComment }
-        if (prev?.node?.elementType == KtTokens.LPAR) {
-            prev = prev?.prevLeaf { it !is PsiWhiteSpace && it !is PsiComment }
-        }
-        if (prev?.node?.elementType != KtTokens.LBRACE) return false
-        val functionLiteral = prev!!.parent as? KtFunctionLiteral ?: return false
-        return functionLiteral.lBrace == prev
-    }
 }

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

@@ -284,44 +284,39 @@ class KotlinCompletionContributor : CompletionContributor() {
             }
         }
 
-        try {
-            result.restartCompletionWhenNothingMatches()
+        result.restartCompletionWhenNothingMatches()
 
-            val configuration = CompletionSessionConfiguration(parameters)
-            if (parameters.completionType == CompletionType.BASIC) {
-                val session = BasicCompletionSession(configuration, parameters, toFromOriginalFileMapper, result)
+        val configuration = CompletionSessionConfiguration(parameters)
+        if (parameters.completionType == CompletionType.BASIC) {
+            val session = BasicCompletionSession(configuration, parameters, toFromOriginalFileMapper, result)
 
-                addPostProcessor(session)
+            addPostProcessor(session)
 
-                if (parameters.isAutoPopup && session.shouldDisableAutoPopup()) {
-                    result.stopHere()
-                    return
-                }
-
-                val somethingAdded = session.complete()
-                if (!somethingAdded && parameters.invocationCount < 2) {
-                    // Rerun completion if nothing was found
-                    val newConfiguration = CompletionSessionConfiguration(
-                            useBetterPrefixMatcherForNonImportedClasses = false,
-                            completeNonAccessibleDeclarations = false,
-                            filterOutJavaGettersAndSetters = false,
-                            completeJavaClassesNotToBeUsed = false,
-                            completeStaticMembers = parameters.invocationCount > 0
-                    )
-
-                    val newSession = BasicCompletionSession(newConfiguration, parameters, toFromOriginalFileMapper, result)
-                    addPostProcessor(newSession)
-                    newSession.complete()
-                }
+            if (parameters.isAutoPopup && session.shouldDisableAutoPopup()) {
+                result.stopHere()
+                return
             }
-            else {
-                val session = SmartCompletionSession(configuration, parameters, toFromOriginalFileMapper, result)
-                addPostProcessor(session)
-                session.complete()
+
+            val somethingAdded = session.complete()
+            if (!somethingAdded && parameters.invocationCount < 2) {
+                // Rerun completion if nothing was found
+                val newConfiguration = CompletionSessionConfiguration(
+                        useBetterPrefixMatcherForNonImportedClasses = false,
+                        completeNonAccessibleDeclarations = false,
+                        filterOutJavaGettersAndSetters = false,
+                        completeJavaClassesNotToBeUsed = false,
+                        completeStaticMembers = parameters.invocationCount > 0
+                )
+
+                val newSession = BasicCompletionSession(newConfiguration, parameters, toFromOriginalFileMapper, result)
+                addPostProcessor(newSession)
+                newSession.complete()
             }
         }
-        catch (e: ProcessCanceledException) {
-            throw rethrowWithCancelIndicator(e)
+        else {
+            val session = SmartCompletionSession(configuration, parameters, toFromOriginalFileMapper, result)
+            addPostProcessor(session)
+            session.complete()
         }
     }
 

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

@@ -19,7 +19,6 @@ package org.jetbrains.kotlin.idea.completion
 import com.intellij.codeInsight.completion.CompletionParameters
 import com.intellij.codeInsight.completion.CompletionResultSet
 import com.intellij.codeInsight.completion.PlainPrefixMatcher
-import com.intellij.openapi.progress.ProcessCanceledException
 import com.intellij.patterns.PlatformPatterns
 import org.jetbrains.kotlin.idea.caches.resolve.getResolutionFacade
 import org.jetbrains.kotlin.idea.util.CallType
@@ -44,29 +43,24 @@ object PackageDirectiveCompletion {
 
         val expression = file.findElementAt(parameters.offset)?.parent as? KtSimpleNameExpression ?: return false
 
-        try {
-            val prefixLength = parameters.offset - expression.textOffset
-            val prefix = expression.text!!
-            val prefixMatcher = PlainPrefixMatcher(prefix.substring(0, prefixLength))
-            val result = result.withPrefixMatcher(prefixMatcher)
+        val prefixLength = parameters.offset - expression.textOffset
+        val prefix = expression.text!!
+        val prefixMatcher = PlainPrefixMatcher(prefix.substring(0, prefixLength))
+        val result = result.withPrefixMatcher(prefixMatcher)
 
-            val resolutionFacade = expression.getResolutionFacade()
+        val resolutionFacade = expression.getResolutionFacade()
 
-            val packageMemberScope = resolutionFacade.moduleDescriptor.getPackage(file.packageFqName.parent()).memberScope
+        val packageMemberScope = resolutionFacade.moduleDescriptor.getPackage(file.packageFqName.parent()).memberScope
 
-            val variants = packageMemberScope.getContributedDescriptors(DescriptorKindFilter.PACKAGES, prefixMatcher.asNameFilter())
-            val lookupElementFactory = BasicLookupElementFactory(resolutionFacade.project, InsertHandlerProvider(callType = CallType.PACKAGE_DIRECTIVE, expectedInfosCalculator = { emptyList() }))
-            for (variant in variants) {
-                val lookupElement = lookupElementFactory.createLookupElement(variant)
-                if (!lookupElement.lookupString.contains(DUMMY_IDENTIFIER)) {
-                    result.addElement(lookupElement)
-                }
+        val variants = packageMemberScope.getContributedDescriptors(DescriptorKindFilter.PACKAGES, prefixMatcher.asNameFilter())
+        val lookupElementFactory = BasicLookupElementFactory(resolutionFacade.project, InsertHandlerProvider(callType = CallType.PACKAGE_DIRECTIVE, expectedInfosCalculator = { emptyList() }))
+        for (variant in variants) {
+            val lookupElement = lookupElementFactory.createLookupElement(variant)
+            if (!lookupElement.lookupString.contains(DUMMY_IDENTIFIER)) {
+                result.addElement(lookupElement)
             }
+        }
 
-            return true
-        }
-        catch (e: ProcessCanceledException) {
-            throw rethrowWithCancelIndicator(e)
-        }
+        return true
     }
 }