(jit-lock-fontify-now): Don't widen.

Let the jit-lock-functions do it if they want to.

1 files changed, 36 insertions, 38 deletions

diff --git a/lisp/jit-lock.el b/lisp/jit-lock.el
index 20214008302..2f832bf3dad 100644
--- a/lisp/jit-lock.el
+++ b/lisp/jit-lock.el
@@ -297,45 +297,43 @@ is active."
 Defaults to the whole buffer.  END can be out of bounds."
   (with-buffer-prepared-for-jit-lock
    (save-excursion
-     (save-restriction
-       (widen)
-       (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 (next)
-         (save-match-data
-           ;; Fontify chunks beginning at START.  The end of a
-           ;; chunk is either `end', or the start of a region
-           ;; before `end' that has already been fontified.
-           (while start
-             ;; Determine the end of this chunk.
-             (setq next (or (text-property-any start end 'fontified t)
-                            end))
-
-             ;; Decide which range of text should be fontified.
-             ;; The problem is that START and NEXT may be in the
-             ;; middle of something matched by a font-lock regexp.
-             ;; Until someone has a better idea, let's start
-             ;; at the start of the line containing START and
-             ;; stop at the start of the line following NEXT.
-             (goto-char next)  (setq next (line-beginning-position 2))
-             (goto-char start) (setq start (line-beginning-position))
+     (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 (next)
+       (save-match-data
+         ;; Fontify chunks beginning at START.  The end of a
+         ;; chunk is either `end', or the start of a region
+         ;; before `end' that has already been fontified.
+         (while start
+           ;; Determine the end of this chunk.
+           (setq next (or (text-property-any start end 'fontified t)
+                          end))
+
+           ;; Decide which range of text should be fontified.
+           ;; The problem is that START and NEXT may be in the
+           ;; middle of something matched by a font-lock regexp.
+           ;; Until someone has a better idea, let's start
+           ;; at the start of the line containing START and
+           ;; stop at the start of the line following NEXT.
+           (goto-char next)  (setq next (line-beginning-position 2))
+           (goto-char start) (setq start (line-beginning-position))
              
-             ;; Fontify the chunk, and mark it as fontified.
-             ;; We mark it first, to make sure that we don't indefinitely
-             ;; re-execute this fontification if an error occurs.
-             (put-text-property start next 'fontified t)
-             (run-hook-with-args 'jit-lock-functions start next)
-
-             ;; Find the start of the next chunk, if any.
-             (setq start (text-property-any next end 'fontified nil)))))))))
+           ;; Fontify the chunk, and mark it as fontified.
+           ;; We mark it first, to make sure that we don't indefinitely
+           ;; re-execute this fontification if an error occurs.
+           (put-text-property start next 'fontified t)
+           (run-hook-with-args 'jit-lock-functions start next)
+
+           ;; Find the start of the next chunk, if any.
+           (setq start (text-property-any next end 'fontified nil))))))))
 
 
 ;;; Stealth fontification.