From 0d0cd711bbab850d0d90ed6ba8667ac905a625ec Mon Sep 17 00:00:00 2001
From: Alexey Utkin <alexey.utkin@jetbrains.com>
Date: Sun, 8 Jun 2025 18:57:25 +0400
Subject: [PATCH] CPP-44970 Enable ClangFormat without creating .clangformat
 file doesn't change status bar

GitOrigin-RevId: 7f6aa50f8cde121c03a3b36416a08cb9ce0ce662
---
 .../modifier/TransientCodeStyleSettings.java  | 29 ++++++++++++++-----
 .../cache/CodeStyleCachedValueProvider.kt     |  2 +-
 2 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/platform/code-style-api/src/com/intellij/psi/codeStyle/modifier/TransientCodeStyleSettings.java b/platform/code-style-api/src/com/intellij/psi/codeStyle/modifier/TransientCodeStyleSettings.java
index ffef86b37645..4ebb0452eb47 100644
--- a/platform/code-style-api/src/com/intellij/psi/codeStyle/modifier/TransientCodeStyleSettings.java
+++ b/platform/code-style-api/src/com/intellij/psi/codeStyle/modifier/TransientCodeStyleSettings.java
@@ -4,6 +4,7 @@ package com.intellij.psi.codeStyle.modifier;
 import com.intellij.application.options.CodeStyle;
 import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.project.Project;
+import com.intellij.openapi.util.Key;
 import com.intellij.openapi.util.ModificationTracker;
 import com.intellij.openapi.util.TextRange;
 import com.intellij.openapi.vfs.VirtualFile;
@@ -93,19 +94,33 @@ public final class TransientCodeStyleSettings extends CodeStyleSettings {
     applyIndentOptionsFromProviders(file.getProject(), file.getVirtualFile());
   }
 
+  private static final Key<Boolean> INDENT_OPTIONS_APPLY_PROGRESS = Key.create("INDENT_OPTIONS_APPLY_PROGRESS");  
+  
   @ApiStatus.Internal
   public void applyIndentOptionsFromProviders(@NotNull Project project, @NotNull VirtualFile file) {
-    for (FileIndentOptionsProvider provider : FileIndentOptionsProvider.EP_NAME.getExtensionList()) {
-      if (provider.useOnFullReformat()) {
-        IndentOptions indentOptions = provider.getIndentOptions(project, this, file);
-        if (indentOptions != null) {
-          IndentOptions targetOptions = getIndentOptions(file.getFileType());
-          if (targetOptions != indentOptions) {
-            targetOptions.copyFrom(indentOptions);
+    if (file.getUserData(INDENT_OPTIONS_APPLY_PROGRESS) != null) {
+      return;
+    }
+
+    // ClsElementImpl.getIndentSize is called inside document generation procedure,
+    // which can trigger code style computation based on the document => Stack Overflow.
+    file.putUserData(INDENT_OPTIONS_APPLY_PROGRESS, Boolean.TRUE);
+    try {
+      for (FileIndentOptionsProvider provider : FileIndentOptionsProvider.EP_NAME.getExtensionList()) {
+        if (provider.useOnFullReformat()) {
+          IndentOptions indentOptions = provider.getIndentOptions(project, this, file);
+          if (indentOptions != null) {
+            IndentOptions targetOptions = getIndentOptions(file.getFileType());
+            if (targetOptions != indentOptions) {
+              targetOptions.copyFrom(indentOptions);
+            }
           }
         }
       }
     }
+    finally {
+      file.putUserData(INDENT_OPTIONS_APPLY_PROGRESS, null);
+    }
   }
 
   public void addDependency(@NotNull ModificationTracker dependency) {
diff --git a/platform/code-style-impl/src/com/intellij/application/options/codeStyle/cache/CodeStyleCachedValueProvider.kt b/platform/code-style-impl/src/com/intellij/application/options/codeStyle/cache/CodeStyleCachedValueProvider.kt
index ba336fe63065..6f0bfdcf2478 100644
--- a/platform/code-style-impl/src/com/intellij/application/options/codeStyle/cache/CodeStyleCachedValueProvider.kt
+++ b/platform/code-style-impl/src/com/intellij/application/options/codeStyle/cache/CodeStyleCachedValueProvider.kt
@@ -197,7 +197,7 @@ internal class CodeStyleCachedValueProvider(val fileSupplier: Supplier<VirtualFi
           LOG.debug { "Created TransientCodeStyleSettings for ${file.name}" }
           for (modifier in CodeStyleSettingsModifier.EP_NAME.extensionList) {
             LOG.debug { "Modifying ${file.name}: ${modifier.javaClass.name}" }
-            if (modifier.modifySettingsAndUiCustomization(modifiableSettings, psiFile)) {
+            if (modifier.modifySettingsAndUiCustomization(modifiableSettings, psiFile) || modifiableSettings.modifier != null) {
               LOG.debug { "Modified ${file.name}: ${modifier.javaClass.name}" }
               currSettings = modifiableSettings
             }