[java, completion] IJPL-207762 NegationInsertHandler is frontend-friendly

GitOrigin-RevId: a35b125635771142dd91abc25687431c1a14b111

java/java-frontback-impl/resource/intellij.java.frontback.impl.xml

@@ -82,6 +82,7 @@
     <completion.frontendFriendlyInsertHandler implementationClass="com.intellij.codeInsight.completion.method.DiamondInsertHandler"/>
     <completion.frontendFriendlyInsertHandler implementationClass="com.intellij.codeInsight.completion.method.RefStartInsertHandler"/>
     <completion.frontendFriendlyInsertHandler implementationClass="com.intellij.codeInsight.completion.method.MethodCallInstallerHandler"/>
+    <completion.frontendFriendlyInsertHandler implementationClass="com.intellij.codeInsight.completion.method.NegationInsertHandler"/>
 
   </extensions>
 </idea-plugin>

java/java-frontback-impl/src/com/intellij/codeInsight/completion/method/NegationInsertHandler.kt

@@ -0,0 +1,27 @@
+// Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package com.intellij.codeInsight.completion.method
+
+import com.intellij.codeInsight.completion.CodeCompletionFeatures
+import com.intellij.codeInsight.completion.FrontendFriendlyInsertHandler
+import com.intellij.codeInsight.completion.InsertionContext
+import com.intellij.codeInsight.completion.method.JavaMethodCallInsertHandlerHelper.findInsertedCall
+import com.intellij.codeInsight.lookup.LookupElement
+import com.intellij.featureStatistics.FeatureUsageTracker
+import kotlinx.serialization.Serializable
+import org.jetbrains.annotations.ApiStatus
+
+@ApiStatus.Internal
+@Serializable
+class NegationInsertHandler : FrontendFriendlyInsertHandler {
+  override fun handleInsert(context: InsertionContext, item: LookupElement) {
+    if (context.completionChar != '!') return
+    val methodCall = findInsertedCall(item, context) ?: return
+
+    //TODO IJPL-207762 where do we want statistics?
+    FeatureUsageTracker.getInstance().triggerFeatureUsed(CodeCompletionFeatures.EXCLAMATION_FINISH)
+
+    context.setAddCompletionChar(false)
+
+    context.document.insertString(methodCall.textRange.startOffset, "!")
+  }
+}

java/java-impl/src/com/intellij/codeInsight/completion/JavaMethodCallInsertHandler.kt

@@ -13,7 +13,6 @@ import com.intellij.codeInsight.hint.api.impls.MethodParameterInfoHandler
 import com.intellij.codeInsight.hints.ParameterHintsPass
 import com.intellij.codeInsight.lookup.Lookup
 import com.intellij.codeInsight.lookup.LookupElement
-import com.intellij.featureStatistics.FeatureUsageTracker
 import com.intellij.injected.editor.EditorWindow
 import com.intellij.openapi.Disposable
 import com.intellij.openapi.editor.Document
@@ -75,7 +74,7 @@ public class JavaMethodCallInsertHandler(
     ImportQualifyAndInsertTypeParametersHandler.create(needImportOrQualify, needExplicitTypeParameters, item),
     MethodCallInstallerHandler(),
     MethodCallRegistrationHandler(),
-    NegationInsertHandler(),
+    createNegationInsertHandler(item),
     afterHandler,
     ArgumentLiveTemplateInsertHandler(canStartArgumentLiveTemplate),
     ShowParameterInfoInsertHandler(),
@@ -286,14 +285,9 @@ private class ImportQualifyAndInsertTypeParametersHandler private constructor(
   }
 }
 
-private class NegationInsertHandler : InsertHandler<JavaMethodCallElement> {
-  override fun handleInsert(context: InsertionContext, item: JavaMethodCallElement) {
-    if (context.completionChar != '!' || !item.isNegatable) return
-    val methodCall = findInsertedCall(item, context) ?: return
-    context.setAddCompletionChar(false)
-    FeatureUsageTracker.getInstance().triggerFeatureUsed(EXCLAMATION_FINISH)
-    context.document.insertString(methodCall.textRange.startOffset, "!")
-  }
+private fun createNegationInsertHandler(item: JavaMethodCallElement): InsertHandler<in JavaMethodCallElement>? {
+  if (!item.isNegatable) return null
+  return NegationInsertHandler()
 }
 
 private class ArgumentLiveTemplateInsertHandler(