Remove buggy non-native image scrolling

[gnu-emacs] / src / casefiddle.c

diff --git a/src/casefiddle.c b/src/casefiddle.c
index b94ea8e212efa5c83660b4c0a14f94f9a2f95a42..c5bfa36663014bbcff41df4653e2dba5c88b21fc 100644 (file)
--- a/src/casefiddle.c
+++ b/src/casefiddle.c
@@ -1,14 +1,14 @@
 /* GNU Emacs case conversion functions.
 
-Copyright (C) 1985, 1994, 1997-1999, 2001-2015 Free Software Foundation,
+Copyright (C) 1985, 1994, 1997-1999, 2001-2016 Free Software Foundation,
 Inc.
 
 This file is part of GNU Emacs.
 
 GNU Emacs is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
 
 GNU Emacs is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -306,14 +306,30 @@ See also `capitalize-region'.  */)
   return Qnil;
 }
 
-DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r",
+DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 3,
+       "(list (region-beginning) (region-end) (region-noncontiguous-p))",
        doc: /* Convert the region to lower case.  In programs, wants two arguments.
 These arguments specify the starting and ending character numbers of
 the region to operate on.  When used as a command, the text between
 point and the mark is operated on.  */)
-  (Lisp_Object beg, Lisp_Object end)
+  (Lisp_Object beg, Lisp_Object end, Lisp_Object region_noncontiguous_p)
 {
-  casify_region (CASE_DOWN, beg, end);
+  Lisp_Object bounds = Qnil;
+
+  if (!NILP (region_noncontiguous_p))
+    {
+      bounds = call1 (Fsymbol_value (intern ("region-extract-function")),
+                     intern ("bounds"));
+
+      while (CONSP (bounds))
+       {
+         casify_region (CASE_DOWN, XCAR (XCAR (bounds)), XCDR (XCAR (bounds)));
+         bounds = XCDR (bounds);
+       }
+    }
+  else
+    casify_region (CASE_DOWN, beg, end);
+
   return Qnil;
 }