From 71a1e4e0242417cd2c5de1491c33da234dd95e67 Mon Sep 17 00:00:00 2001
From: Konstantin Bulenkov <kb@jetbrains.com>
Date: Wed, 7 Oct 2009 13:14:35 +0400
Subject: [PATCH] PsiChangeTracker tests

---
 .../com/intellij/openapi/vcs/changes/PsiChangeTracker.java  | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/platform/lang-impl/src/com/intellij/openapi/vcs/changes/PsiChangeTracker.java b/platform/lang-impl/src/com/intellij/openapi/vcs/changes/PsiChangeTracker.java
index 7613f32394..e8b35a78e9 100644
--- a/platform/lang-impl/src/com/intellij/openapi/vcs/changes/PsiChangeTracker.java
+++ b/platform/lang-impl/src/com/intellij/openapi/vcs/changes/PsiChangeTracker.java
@@ -31,18 +31,23 @@ public class PsiChangeTracker {
 
   public static <T extends PsiElement> Map<T, FileStatus> getElementsChanged(PsiFile file, final PsiElementFilter<T> filter) {
     final Project project = file.getProject();
-    FileStatus status = FileStatusManager.getInstance(project).getStatus(file.getVirtualFile());
     final String oldText = getUnmodifiedDocument(file.getVirtualFile(), project);
     //TODO: make loop for different languages
     //TODO: for ( PsiFile f : file.getViewProvider().getAllFiles() )
     //TODO: for some languages (eg XML) isEquivalentTo works ugly. Think about pluggable matchers for different languages/elements
-    final List<T> elements = new ArrayList<T>();
-    final List<T> oldElements = new ArrayList<T>();
     final PsiFile oldFile = oldText == null
                             ? null : PsiFileFactory.getInstance(project).createFileFromText(oldText, file);
+    return getElementsChanged(file, oldFile, filter);
+  }
 
-    file.accept(new MyVisitor<T>(filter, elements));
+  public static <T extends PsiElement> Map<T, FileStatus> getElementsChanged(PsiFile file, PsiFile oldFile, final PsiElementFilter<T> filter) {
+    final Project project = file.getProject();
+    final List<T> elements = new ArrayList<T>();
+    final List<T> oldElements = new ArrayList<T>();
 
+    file.accept(new MyVisitor<T>(filter, elements));
+    final VirtualFile vf = file.getVirtualFile();
+    final FileStatus status = vf == null ? null : FileStatusManager.getInstance(project).getStatus(vf);
     final HashMap<T, FileStatus> result = new HashMap<T, FileStatus>();
     if (status == FileStatus.ADDED ||
         status == FileStatus.DELETED ||
-- 
2.11.4.GIT