X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/f95211e9a40b1c7d1beff0e15aa67450f80bd8bb..651182d070bfbb22a47133adf8d90c849e5e6467:/lisp/jit-lock.el

diff --git a/lisp/jit-lock.el b/lisp/jit-lock.el
index 5f9196da64..810c220516 100644
--- a/lisp/jit-lock.el
+++ b/lisp/jit-lock.el
@@ -1,6 +1,6 @@
 ;;; jit-lock.el --- just-in-time fontification  -*- lexical-binding: t -*-
 
-;; Copyright (C) 1998, 2000-2015 Free Software Foundation, Inc.
+;; Copyright (C) 1998, 2000-2016 Free Software Foundation, Inc.
 
 ;; Author: Gerd Moellmann <gerd@gnu.org>
 ;; Keywords: faces files
@@ -382,14 +382,6 @@ Defaults to the whole buffer.  END can be out of bounds."
    (save-excursion
      (unless start (setq start (point-min)))
      (setq end (if end (min end (point-max)) (point-max)))
-     ;; This did bind `font-lock-beginning-of-syntax-function' to
-     ;; nil at some point, for an unknown reason.  Don't do this; it
-     ;; can make highlighting slow due to expensive calls to
-     ;; `parse-partial-sexp' in function
-     ;; `font-lock-fontify-syntactically-region'.  Example: paging
-     ;; from the end of a buffer to its start, can do repeated
-     ;; `parse-partial-sexp' starting from `point-min', which can
-     ;; take a long time in a large buffer.
      (let ((orig-start start) next)
        (save-match-data
 	 ;; Fontify chunks beginning at START.  The end of a
@@ -583,11 +575,13 @@ non-nil in a repeated invocation of this function."
 		      'fontified nil))
 		   (setq pos (next-single-property-change
                               pos 'fontified)))))))))
-    (setq jit-lock-defer-buffers nil)
     ;; Force fontification of the visible parts.
-    (let ((jit-lock-defer-timer nil))
+    (let ((buffers jit-lock-defer-buffers)
+          (jit-lock-defer-timer nil))
+      (setq jit-lock-defer-buffers nil)
       ;; (message "Jit-Defer Now")
-      (sit-for 0)
+      (unless (redisplay)                       ;FIXME: Should we `force'?
+        (setq jit-lock-defer-buffers buffers))
       ;; (message "Jit-Defer Done")
       )))