From 32d50033470311e8a32c9be0085249ec47b4ea8b Mon Sep 17 00:00:00 2001
From: Alexey Kudravtsev <cdr@intellij.com>
Date: Tue, 26 May 2015 17:34:54 +0300
Subject: [PATCH] ignore excluded files modifications during highlighting

---
 .../codeInsight/daemon/impl/PsiChangeHandler.java      | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/PsiChangeHandler.java b/platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/PsiChangeHandler.java
index c198ead746f4..2c0f5f218c9a 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/PsiChangeHandler.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/daemon/impl/PsiChangeHandler.java
@@ -32,6 +32,7 @@ import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.fileEditor.FileEditorManager;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.project.ProjectCoreUtil;
+import com.intellij.openapi.roots.ProjectRootManager;
 import com.intellij.openapi.util.Key;
 import com.intellij.openapi.util.Pair;
 import com.intellij.openapi.util.TextRange;
@@ -189,7 +190,7 @@ class PsiChangeHandler extends PsiTreeChangeAdapter implements Disposable {
     String propertyName = event.getPropertyName();
     if (!propertyName.equals(PsiTreeChangeEvent.PROP_WRITABLE)) {
       Object oldValue = event.getOldValue();
-      if (oldValue instanceof VirtualFile && ProjectCoreUtil.isProjectOrWorkspaceFile((VirtualFile)oldValue)) {
+      if (oldValue instanceof VirtualFile && shouldBeIgnored((VirtualFile)oldValue)) {
         // ignore workspace.xml
         return;
       }
@@ -231,7 +232,7 @@ class PsiChangeHandler extends PsiTreeChangeAdapter implements Disposable {
       return;
     }
     VirtualFile virtualFile = file.getVirtualFile();
-    if (virtualFile != null && ProjectCoreUtil.isProjectOrWorkspaceFile(virtualFile)) {
+    if (virtualFile != null && shouldBeIgnored(virtualFile)) {
       // ignore workspace.xml
       return;
     }
@@ -259,6 +260,11 @@ class PsiChangeHandler extends PsiTreeChangeAdapter implements Disposable {
     }
   }
 
+  private boolean shouldBeIgnored(@NotNull VirtualFile virtualFile) {
+    return ProjectCoreUtil.isProjectOrWorkspaceFile(virtualFile) ||
+           ProjectRootManager.getInstance(myProject).getFileIndex().isExcluded(virtualFile);
+  }
+
   @Nullable
   private static PsiElement getChangeHighlightingScope(@NotNull PsiElement element) {
     DefaultChangeLocalityDetector defaultDetector = null;