From 49662839842660e769f4b500ec64b7a33f057fa0 Mon Sep 17 00:00:00 2001
From: Mikhail Pyltsin <Mikhail.Pyltsin@jetbrains.com>
Date: Thu, 11 Sep 2025 16:13:46 +0200
Subject: [PATCH] [java] IDEA-378944 Navigation to implicit classes from
 project view requires extra clicks

(cherry picked from commit 19da49da5217fa5644b437ca295be751531df864)

IJ-CR-175396

GitOrigin-RevId: f38a624274bc54d74fa10e27b6ae5d43f78e22cc
---
 .../impl/ClassesTreeStructureProvider.java     | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/java/java-impl/src/com/intellij/ide/projectView/impl/ClassesTreeStructureProvider.java b/java/java-impl/src/com/intellij/ide/projectView/impl/ClassesTreeStructureProvider.java
index c5886f003589..82e693011e83 100644
--- a/java/java-impl/src/com/intellij/ide/projectView/impl/ClassesTreeStructureProvider.java
+++ b/java/java-impl/src/com/intellij/ide/projectView/impl/ClassesTreeStructureProvider.java
@@ -74,8 +74,10 @@ public final class ClassesTreeStructureProvider implements SelectableTreeStructu
                                                                       : Collections.emptyList();
           if (classes.length == 1 && isClassForTreeNode(file, classes[0])) {
             result.add(new ClassTreeNode(myProject, classes[0], settings1, nestedFileNodes));
-          } else {
-            result.add(new PsiClassOwnerTreeNode(classOwner, settings1, nestedFileNodes));
+          }
+          else {
+            boolean isImplicitClass = classes.length == 1 && classes[0] instanceof PsiImplicitClass;
+            result.add(new PsiClassOwnerTreeNode(classOwner, settings1, nestedFileNodes, isImplicitClass));
           }
           continue;
         }
@@ -148,15 +150,23 @@ public final class ClassesTreeStructureProvider implements SelectableTreeStructu
 
   private static class PsiClassOwnerTreeNode extends PsiFileNode implements FileNodeWithNestedFileNodes {
     private final @NotNull Collection<? extends AbstractTreeNode<?>> myNestedFileNodes;
+    private final boolean myIsImplicitClass;
 
     PsiClassOwnerTreeNode(@NotNull PsiClassOwner classOwner,
                           ViewSettings settings,
-                          @NotNull Collection<? extends AbstractTreeNode<?>> nestedFileNodes) {
+                          @NotNull Collection<? extends AbstractTreeNode<?>> nestedFileNodes,
+                          boolean isImplicitClass) {
       super(classOwner.getProject(), classOwner, settings);
-
+      myIsImplicitClass = isImplicitClass;
       myNestedFileNodes = nestedFileNodes;
     }
 
+    @Override
+    public boolean expandOnDoubleClick() {
+      if (myIsImplicitClass) return false;
+      return super.expandOnDoubleClick();
+    }
+
     @Override
     public @NotNull Collection<? extends AbstractTreeNode<?>> getNestedFileNodes() {
       return myNestedFileNodes;