Adapting code completion to no annotations without "@"

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

@@ -30,8 +30,6 @@ import com.intellij.psi.util.PsiTreeUtil
 import com.intellij.util.ProcessingContext
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.ClassKind
-import org.jetbrains.kotlin.descriptors.ClassifierDescriptor
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.idea.completion.smart.ExpectedInfoMatch
 import org.jetbrains.kotlin.idea.completion.smart.SMART_COMPLETION_ITEM_PRIORITY_KEY
 import org.jetbrains.kotlin.idea.completion.smart.SmartCompletion
@@ -42,7 +40,10 @@ import org.jetbrains.kotlin.idea.util.CallTypeAndReceiver
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.*
-import org.jetbrains.kotlin.psi.psiUtil.*
+import org.jetbrains.kotlin.psi.psiUtil.getNonStrictParentOfType
+import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
+import org.jetbrains.kotlin.psi.psiUtil.parents
+import org.jetbrains.kotlin.psi.psiUtil.startOffset
 import org.jetbrains.kotlin.resolve.descriptorUtil.builtIns
 import org.jetbrains.kotlin.resolve.scopes.DescriptorKindExclude
 import org.jetbrains.kotlin.resolve.scopes.DescriptorKindFilter
@@ -68,16 +69,6 @@ class BasicCompletionSession(configuration: CompletionSessionConfiguration,
                 classKindFilter = { it != ClassKind.ENUM_ENTRY }
         ),
 
-        ANNOTATION_TYPES(
-                descriptorKindFilter = ANNOTATION_TYPES_FILTER,
-                classKindFilter = { it == ClassKind.ANNOTATION_CLASS }
-        ),
-
-        ANNOTATION_TYPES_OR_PARAMETER_NAME(
-                descriptorKindFilter = ANNOTATION_TYPES_FILTER,
-                classKindFilter = { it == ClassKind.ANNOTATION_CLASS }
-        ),
-
         KEYWORDS_ONLY(descriptorKindFilter = null, classKindFilter = null),
 
         NAMED_ARGUMENTS_ONLY(descriptorKindFilter = null, classKindFilter = null),
@@ -126,18 +117,6 @@ class BasicCompletionSession(configuration: CompletionSessionConfiguration,
                 CompletionKind.KEYWORDS_ONLY
         }
 
-        val annotationEntry = position.getStrictParentOfType<JetAnnotationEntry>()
-        if (annotationEntry != null) {
-            val valueArgList = position.getStrictParentOfType<JetValueArgumentList>()
-            if (valueArgList == null || !annotationEntry.isAncestor(valueArgList)) {
-                val parent = annotationEntry.getParent()
-                if (parent is JetDeclarationModifierList && parent.getParent() is JetParameter) {
-                    return CompletionKind.ANNOTATION_TYPES_OR_PARAMETER_NAME
-                }
-                return CompletionKind.ANNOTATION_TYPES
-            }
-        }
-
         // Check that completion in the type annotation context and if there's a qualified
         // expression we are at first of it
         val typeReference = position.getStrictParentOfType<JetTypeReference>()
@@ -156,7 +135,7 @@ class BasicCompletionSession(configuration: CompletionSessionConfiguration,
     }
 
     private fun shouldCompleteParameterNameAndType(): Boolean {
-        if (completionKind != CompletionKind.PARAMETER_NAME && completionKind != CompletionKind.ANNOTATION_TYPES_OR_PARAMETER_NAME) return false
+        if (completionKind != CompletionKind.PARAMETER_NAME) return false
 
         val parameter = position.getNonStrictParentOfType<JetParameter>()!!
         val list = parameter.parent as? JetParameterList ?: return false
@@ -170,7 +149,7 @@ class BasicCompletionSession(configuration: CompletionSessionConfiguration,
     }
 
     public fun shouldDisableAutoPopup(): Boolean {
-        if (completionKind == CompletionKind.PARAMETER_NAME || completionKind == CompletionKind.ANNOTATION_TYPES_OR_PARAMETER_NAME) {
+        if (completionKind == CompletionKind.PARAMETER_NAME) {
             if (!shouldCompleteParameterNameAndType() || TemplateManager.getInstance(project).getActiveTemplate(parameters.editor) != null) {
                 return true
             }
@@ -395,17 +374,4 @@ class BasicCompletionSession(configuration: CompletionSessionConfiguration,
 
         return sorter
     }
-
-    private companion object {
-        object NonAnnotationClassifierExclude : DescriptorKindExclude() {
-            override fun excludes(descriptor: DeclarationDescriptor): Boolean {
-                if (descriptor !is ClassifierDescriptor) return false
-                return descriptor !is ClassDescriptor || descriptor.getKind() != ClassKind.ANNOTATION_CLASS
-            }
-
-            override val fullyExcludedDescriptorKinds: Int get() = 0
-        }
-
-        val ANNOTATION_TYPES_FILTER = DescriptorKindFilter(DescriptorKindFilter.NON_SINGLETON_CLASSIFIERS_MASK or DescriptorKindFilter.PACKAGES_MASK) exclude NonAnnotationClassifierExclude
-    }
 }

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

@@ -84,7 +84,6 @@ public class KotlinCompletionContributor : CompletionContributor() {
             else -> specialLambdaSignatureDummyIdentifier(tokenBefore)
                     ?: specialExtensionReceiverDummyIdentifier(tokenBefore)
                     ?: specialInTypeArgsDummyIdentifier(tokenBefore)
-                    ?: specialInParameterListDummyIdentifier(tokenBefore)
                     ?: specialInArgumentListDummyIdentifier(tokenBefore)
                     ?: DEFAULT_DUMMY_IDENTIFIER
         }
@@ -389,22 +388,6 @@ public class KotlinCompletionContributor : CompletionContributor() {
         }
     }
 
-    private fun specialInParameterListDummyIdentifier(tokenBefore: PsiElement?): String? {
-        if (tokenBefore == null) return null
-        var parent = tokenBefore.getParent()
-        while (parent != null) {
-            if (parent is JetParameterList) {
-                val balance = countParenthesisBalance(tokenBefore, parent)
-                val count = if (balance > 1) balance - 1 else 0
-                return CompletionUtilCore.DUMMY_IDENTIFIER_TRIMMED + ")".repeat(count) + " a: B"
-            }
-            if (parent is JetTypeElement) return null
-            if (parent is JetAnnotationEntry) return null
-            parent = parent.getParent()
-        }
-        return null
-    }
-
     private fun specialInArgumentListDummyIdentifier(tokenBefore: PsiElement?): String? {
         // If we insert $ in the argument list of a delegation specifier, this will break parsing
         // and the following block will not be attached as a body to the constructor. Therefore

idea/idea-completion/testData/basic/common/annotations/AnnotationTarget.kt

@@ -1,3 +1,3 @@
-<caret> annotation class Annotated
+@<caret> annotation class Annotated
 
 // EXIST: Target

idea/idea-completion/testData/basic/common/annotations/Deprecated2.kt

@@ -1,4 +1,4 @@
-@Dep<caret>
+@Deprecate<caret>
 fun foo() { }
 
 // INVOCATION_COUNT: 2

idea/idea-completion/testData/basic/common/annotations/FunctionAnnotation1.kt

@@ -1,7 +1,7 @@
 annotation class Hello
 val v = 1
 
-<caret>
+@<caret>
 fun some() {}
 
 // INVOCATION_COUNT: 0

idea/idea-completion/testData/basic/common/annotations/ParameterAnnotation1.kt

@@ -1,7 +1,7 @@
 annotation class Hello
 val v = 1
 
-fun foo(<caret>) { }
+fun foo(@<caret>) { }
 
 // INVOCATION_COUNT: 1
 // EXIST: Hello

idea/idea-completion/testData/basic/common/annotations/ParameterAnnotation2.kt

@@ -1,6 +1,6 @@
 annotation class SHello
 
-fun foo(S<caret>) { }
+fun foo(@S<caret>) { }
 
 // INVOCATION_COUNT: 1
 // EXIST: SHello

idea/idea-completion/testData/basic/common/annotations/ParameterAnnotation3.kt

@@ -1,7 +1,7 @@
 annotation class Hello
 val v = 1
 
-fun foo(p: String, <caret>) { }
+fun foo(p: String, @<caret>) { }
 
 // INVOCATION_COUNT: 1
 // EXIST: Hello

idea/idea-completion/testData/basic/common/annotations/ParameterAnnotation4.kt

@@ -1,7 +1,7 @@
 annotation class Hello
 val v = 1
 
-fun foo(@Volatile <caret>) { }
+fun foo(@Volatile @<caret>) { }
 
 // INVOCATION_COUNT: 1
 // EXIST: Hello

idea/idea-completion/testData/basic/common/annotations/ParameterAnnotation5.kt

@@ -1,7 +1,7 @@
 annotation class Hello
 val v = 1
 
-fun foo(<caret>
+fun foo(@<caret>
 
 // INVOCATION_COUNT: 1
 // EXIST: Hello

idea/idea-completion/testData/basic/common/annotations/ParameterAnnotation7.kt

@@ -1,4 +1,4 @@
-fun foo(kotlin.<caret>) { }
+fun foo(@kotlin.<caret>) { }
 
 // INVOCATION_COUNT: 1
 // EXIST: Suppress

idea/idea-completion/testData/basic/common/annotations/TopLevelAnnotation1.kt

@@ -1,7 +1,7 @@
 annotation class Hello
 val v = 1
 
-<caret>
+@<caret>
 
 // INVOCATION_COUNT: 0
 // EXIST: Hello

idea/idea-completion/testData/basic/common/annotations/TopLevelAnnotation3.kt

@@ -1,7 +1,7 @@
 annotation class Hello
 val v = 1
 
-<caret>
+@<caret>
 class C
 
 // INVOCATION_COUNT: 0

idea/idea-completion/testData/basic/common/annotations/TopLevelAnnotationArg1.kt

@@ -1,6 +1,6 @@
 import java.lang.annotation.*
 
-Retention(<caret>
+@Retention(<caret>
 
 // INVOCATION_COUNT: 0
 // EXIST_JAVA_ONLY: RetentionPolicy

idea/idea-completion/testData/basic/common/annotations/TopLevelAnnotationArg2.kt

@@ -1,6 +1,6 @@
 import java.lang.annotation.*
 
-Retention(RetentionPolicy.<caret>
+@Retention(RetentionPolicy.<caret>
 
 // INVOCATION_COUNT: 0
 // EXIST_JAVA_ONLY: SOURCE

idea/idea-completion/testData/weighers/basic/DeprecatedFun.kt

@@ -1,5 +1,5 @@
 fun foo1() {}
-Deprecated("Use foo3 instead") fun foo2() {}
+@Deprecated("Use foo3 instead") fun foo2() {}
 fun foo3() {}
 
 fun test() {

idea/idea-completion/testData/weighers/basic/parameterNameAndType/Deprecated.kt

@@ -1,5 +1,5 @@
 class MyClassA
-Deprecated class MyClassB
+@Deprecated class MyClassB
 class MyClassC
 
 fun foo(myCla<caret>)