commit a7c3107148b9fd14d3c029e7e771e00de02bf2f6
author Krishna Murthy <Krishna.Murthy@guptaworldwide.com> Fri May 07 00:40:18 2004 +0000
committer Alexandre Julliard <julliard@winehq.org> Fri May 07 00:40:18 2004 +0000
tree a68a1cab0342cb0ee91da4856d863d6fc4945866
parent f950d9738114a9bbbf95ae1b1e26261b77397ac7

EM_UNDO should always return TRUE for single line edit.

controls/edit.c

diff --git a/controls/edit.c b/controls/edit.c
index b206821..1a73ae4 100644
--- a/controls/edit.c
+++ b/controls/edit.c
@@ -3534,11 +3534,15 @@
 	INT ulength;
 	LPWSTR utext;
 
-	/* Protect read-only edit control from modification */
-	if(es->style & ES_READONLY)
-	    return FALSE;
+	/* As per MSDN spec, for a single-line edit control,
+	   the return value is always TRUE */
+	if( es->style & ES_READONLY )
+            return !(es->style & ES_MULTILINE);
 
 	ulength = strlenW(es->undo_text);
+	if( ulength == 0 )
+            return !(es->style & ES_MULTILINE);
+
 	utext = HeapAlloc(GetProcessHeap(), 0, (ulength + 1) * sizeof(WCHAR));
 
 	strcpyW(utext, es->undo_text);