KTIJ-19876 [kotlin] Hide java class action in pure kotlin source roots

Signed-off-by: Vladimir Dolzhenko <vladimir.dolzhenko@jetbrains.com>

GitOrigin-RevId: e1bdd7e3a885d263d051dd469473a6e5dfdc6572

java/java-backend/resources/META-INF/JavaActions.xml

@@ -383,4 +383,9 @@
       <synonym key="action.DevKit.Bootstrap.synonym"/>
     </action>
   </actions>
+
+  <extensionPoints>
+    <extensionPoint qualifiedName="com.intellij.java.class.action.suppressor"
+                    interface="com.intellij.ide.actions.JavaClassActionSuppressor" dynamic="true"/>
+  </extensionPoints>
 </idea-plugin>

java/java-impl/src/com/intellij/ide/actions/CreateClassAction.java

@@ -12,6 +12,7 @@ import com.intellij.ide.fileTemplates.JavaCreateFromTemplateHandler;
 import com.intellij.ide.fileTemplates.JavaTemplateUtil;
 import com.intellij.ide.highlighter.JavaFileType;
 import com.intellij.java.JavaBundle;
+import com.intellij.openapi.actionSystem.DataContext;
 import com.intellij.openapi.project.DumbAware;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.roots.PackageIndex;
@@ -36,6 +37,7 @@ import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jps.model.module.JpsModuleSourceRootType;
 
 import javax.swing.Icon;
+import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.function.Supplier;
@@ -56,6 +58,19 @@ public class CreateClassAction extends JavaCreateTemplateInPackageAction<PsiClas
     super(text, description, icon, rootTypes);
   }
 
+  @Override
+  protected boolean isAvailable(@NotNull DataContext dataContext) {
+    if (!super.isAvailable(dataContext)) return false;
+
+    List<JavaClassActionSuppressor> list = JavaClassActionSuppressor.EP_NAME.getExtensionList();
+    for (JavaClassActionSuppressor suppressor : list) {
+      if (suppressor.isSuppressed(dataContext)) {
+        return false;
+      }
+    }
+    return true;
+  }
+
   @Override
   protected void buildDialog(@NotNull Project project, @NotNull PsiDirectory directory,
                              @NotNull CreateFileFromTemplateDialog.Builder builder) {

java/java-impl/src/com/intellij/ide/actions/JavaClassActionSuppressor.java

@@ -0,0 +1,14 @@
+// Copyright 2000-2026 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package com.intellij.ide.actions;
+
+import com.intellij.openapi.actionSystem.DataContext;
+import com.intellij.openapi.extensions.ExtensionPointName;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+@ApiStatus.Internal
+public interface JavaClassActionSuppressor {
+  ExtensionPointName<JavaClassActionSuppressor> EP_NAME = ExtensionPointName.create("com.intellij.java.class.action.suppressor");
+
+  boolean isSuppressed(@NotNull DataContext dataContext);
+}

plugins/kotlin/base/code-insight/src/org/jetbrains/kotlin/idea/core/KotlinJavaClassActionSuppressor.kt

@@ -0,0 +1,30 @@
+// Copyright 2000-2026 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package org.jetbrains.kotlin.idea.core
+
+import com.intellij.ide.actions.JavaClassActionSuppressor
+import com.intellij.openapi.actionSystem.CommonDataKeys
+import com.intellij.openapi.actionSystem.DataContext
+import com.intellij.openapi.actionSystem.LangDataKeys
+import com.intellij.openapi.roots.ProjectRootManager
+import com.intellij.psi.PsiDirectory
+import org.jetbrains.kotlin.idea.base.util.KOTLIN_SOURCE_ROOT_TYPES
+import org.jetbrains.kotlin.idea.facet.KotlinFacet
+
+internal class KotlinJavaClassActionSuppressor: JavaClassActionSuppressor {
+    override fun isSuppressed(dataContext: DataContext): Boolean {
+        val ideView = LangDataKeys.IDE_VIEW.getData(dataContext) ?: return false
+        val project = CommonDataKeys.PROJECT.getData(dataContext) ?: return false
+        val projectFileIndex = ProjectRootManager.getInstance(project).fileIndex
+
+        return ideView.directories.any { directory: PsiDirectory ->
+            val virtualFile = directory.virtualFile
+            val module = projectFileIndex.getModuleForFile(virtualFile) ?: return@any false
+            val kotlinFacet = KotlinFacet.get(module)
+            val kotlinSourceFolders = kotlinFacet?.configuration?.settings?.pureKotlinSourceFolders
+            val kotlinSourceRootOfType =
+                projectFileIndex.isUnderSourceRootOfType(virtualFile, KOTLIN_SOURCE_ROOT_TYPES) ||
+                        (kotlinSourceFolders?.let { virtualFile.toNioPath().toString() in it } ?: false)
+            kotlinSourceRootOfType
+        }
+    }
+}

plugins/kotlin/plugin/common/resources/META-INF/kotlin-core.xml

@@ -357,6 +357,8 @@
             language="kotlin"
             implementationClass="org.jetbrains.kotlin.idea.highlighter.KotlinTestRunLineMarkerContributor"/>
 
+    <java.class.action.suppressor implementation="org.jetbrains.kotlin.idea.core.KotlinJavaClassActionSuppressor"/>
+
     <lang.inspectionSuppressor language="kotlin" implementationClass="org.jetbrains.kotlin.idea.inspections.suppress.KotlinInspectionSuppressor"/>
     <optionController implementation="org.jetbrains.kotlin.idea.configuration.KotlinCompilerPluginProvider"/>
     <optionController implementation="org.jetbrains.kotlin.idea.configuration.KotlinDependencyProvider"/>