From d500d31ec2d7bfa8d6c8e0e2c9f770195fd59ef8 Mon Sep 17 00:00:00 2001
From: Bartek Pacia <bartek.pacia@jetbrains.com>
Date: Tue, 19 Aug 2025 14:52:41 +0000
Subject: [PATCH] [ktor] KTOR-8776 Fix "cannot access" false-positive in run
 configuration editor

This occurs when the main method is in a companion object which
itself is inside a nested class.


Merge-request: IJ-MR-172860
Merged-by: Bartek Pacia <bartek.pacia@jetbrains.com>

GitOrigin-RevId: d2d812ba6e84648c922f2ad32942e6360dad12f8
---
 .../run/KotlinRunConfigurationEditor.java     | 25 +++++++++++--------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/plugins/kotlin/run-configurations/jvm/src/org/jetbrains/kotlin/idea/run/KotlinRunConfigurationEditor.java b/plugins/kotlin/run-configurations/jvm/src/org/jetbrains/kotlin/idea/run/KotlinRunConfigurationEditor.java
index 6b1bad6abe9f..fb44d6469dc3 100644
--- a/plugins/kotlin/run-configurations/jvm/src/org/jetbrains/kotlin/idea/run/KotlinRunConfigurationEditor.java
+++ b/plugins/kotlin/run-configurations/jvm/src/org/jetbrains/kotlin/idea/run/KotlinRunConfigurationEditor.java
@@ -128,16 +128,8 @@ public final class KotlinRunConfigurationEditor extends SettingsEditor<KotlinRun
 
     private void createUIComponents() {
         mainClass = new LabeledComponent<>();
-        mainClass.setComponent(ClassEditorField.createClassField(project, () -> moduleSelector.getModule(), (declaration, place) -> {
-            if (declaration instanceof KtLightClass aClass) {
-              if (ConfigurationUtil.MAIN_CLASS.value(aClass)
-                    && (PsiMethodUtil.findMainMethod(aClass) != null || place.getParent() != null)
-                    && moduleSelector.findClass(((PsiClass)declaration).getQualifiedName()) != null) {
-                    return JavaCodeFragment.VisibilityChecker.Visibility.VISIBLE;
-                }
-            }
-            return JavaCodeFragment.VisibilityChecker.Visibility.NOT_VISIBLE;
-        },  createApplicationClassBrowser(project, () -> moduleSelector.getModule(), moduleChooser)));
+        mainClass.setComponent(ClassEditorField.createClassField(project, () -> moduleSelector.getModule(), VISIBILITY_CHECKER,
+                                createApplicationClassBrowser(project, () -> moduleSelector.getModule(), moduleChooser)));
     }
 
     @Override
@@ -154,4 +146,15 @@ public final class KotlinRunConfigurationEditor extends SettingsEditor<KotlinRun
         moduleChooser.setAnchor(anchor);
         shortenClasspathModeCombo.setAnchor(anchor);
     }
-}
+
+    public static final JavaCodeFragment.VisibilityChecker VISIBILITY_CHECKER = (declaration, place) -> {
+        if (declaration instanceof KtLightClass aClass) {
+            if (ConfigurationUtil.MAIN_CLASS.value(aClass)
+                    && (PsiMethodUtil.findMainMethod(aClass) != null || place.getParent() != null)
+                    && ModuleUtilCore.findModuleForPsiElement(declaration) != null) {
+                return JavaCodeFragment.VisibilityChecker.Visibility.VISIBLE;
+            }
+        }
+        return JavaCodeFragment.VisibilityChecker.Visibility.NOT_VISIBLE;
+    };
+}
\ No newline at end of file