From 9b1beea7d719ce7874e60ac8dd02ad9eb09ef595 Mon Sep 17 00:00:00 2001
From: Phil Krylov <phil@newstar.rinet.ru>
Date: Sun, 5 Feb 2006 12:18:55 +0100
Subject: [PATCH] riched20: Empty undo stack after EM_STREAMIN without
 SFF_SELECTION flag.

---
 dlls/riched20/editor.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/dlls/riched20/editor.c b/dlls/riched20/editor.c
index 2a458e7256c..b9ce16281c7 100644
--- a/dlls/riched20/editor.c
+++ b/dlls/riched20/editor.c
@@ -664,14 +664,22 @@ static LRESULT ME_StreamIn(ME_TextEditor *editor, DWORD format, EDITSTREAM *stre
   }
   
   editor->nUndoMode = nUndoMode;
-  pUI = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
-  TRACE("from %d to %d\n", from, to);
-  if (pUI && from < to)
+  if (format & SFF_SELECTION)
   {
-    pUI->nStart = from;
-    pUI->nLen = to-from;
+    pUI = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
+    TRACE("from %d to %d\n", from, to);
+    if (pUI && from < to)
+    {
+      pUI->nStart = from;
+      pUI->nLen = to-from;
+    }
+    ME_CommitUndo(editor);
   }
-  ME_CommitUndo(editor);
+  else
+  {
+    ME_EmptyUndoStack(editor);
+  }
+
   ME_ReleaseStyle(style); 
   editor->nEventMask = nEventMask;
   if (editor->bRedraw)