From 8d055f695266262cc941ecdfb6e84385da15c563 Mon Sep 17 00:00:00 2001
From: Nikolay Krasko <nikolay.krasko@jetbrains.com>
Date: Fri, 24 Jun 2016 14:20:13 +0300
Subject: [PATCH] Use file.modificationStamp to invalidate caches for synthetic
 files

It previously worked because of updating all counters. That behaviour was removed in
https://github.com/JetBrains/intellij-community/commit/3b860d69ee1b32b210ddf88b1e042dd70ea87cd9.

getUserData(FILE_OUT_OF_BLOCK_MODIFICATION_COUNT) is probably useless because copied file has
isEventSystemEnabled() == false that prevents sending notifications about PSI changes. This need additional checks.
---
 .../kotlin/idea/caches/resolve/KotlinCacheServiceImpl.kt       | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/KotlinCacheServiceImpl.kt b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/KotlinCacheServiceImpl.kt
index 0686686d4c1..fa4f7d8740d 100644
--- a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/KotlinCacheServiceImpl.kt
+++ b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/KotlinCacheServiceImpl.kt
@@ -137,7 +137,8 @@ class KotlinCacheServiceImpl(val project: Project) : KotlinCacheService {
         val syntheticFileModule = files.map { it.getModuleInfo() }.toSet().single()
         val sdk = syntheticFileModule.sdk
         val filesModificationTracker = ModificationTracker {
-            files.sumByLong { it.outOfBlockModificationCount }
+            // TODO: Check getUserData(FILE_OUT_OF_BLOCK_MODIFICATION_COUNT) actually works
+            files.sumByLong { it.outOfBlockModificationCount + it.modificationStamp }
         }
         val dependenciesForSyntheticFileCache = listOf(PsiModificationTracker.OUT_OF_CODE_BLOCK_MODIFICATION_COUNT, filesModificationTracker)
         val debugName = "completion/highlighting in $syntheticFileModule for files ${files.joinToString { it.name }} for platform $targetPlatform"