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Re: undo in loaddefs.el buffer


From: Jan D.
Subject: Re: undo in loaddefs.el buffer
Date: Wed, 29 Dec 2004 13:59:10 +0100


Now I understand the problem.  Does this fix it?

Yes it does.

        Jan D.


*** simple.el   27 Dec 2004 20:52:25 -0500      1.676
--- simple.el   28 Dec 2004 13:49:15 -0500      
***************
*** 1524,1540 ****
             '(0 . 0)))
      '(0 . 0)))

;; When the first undo batch in an undo list is longer than undo-outer-limit,
  ;; this function gets called to ask the user what to do.
  ;; Garbage collection is inhibited around the call,
  ;; so it had better not do a lot of consing.
  (setq undo-outer-limit-function 'undo-outer-limit-truncate)
  (defun undo-outer-limit-truncate (size)
!   (if (let (use-dialog-box)
! (yes-or-no-p (format "Buffer %s undo info is %d bytes long; discard it? "
!                            (buffer-name) size)))
!       (progn (setq buffer-undo-list nil) t)
!     nil))
  
  (defvar shell-command-history nil
    "History list for some commands that read shell commands.")
--- 1524,1556 ----
             '(0 . 0)))
      '(0 . 0)))

+ (defvar undo-extra-outer-limit nil
+   "If non-nil, an extra level of size that's ok in an undo item.
+ We don't ask the user about truncating the undo list until the
+ current item gets bigger than this amount.")
+ (make-variable-buffer-local 'undo-extra-outer-limit)
+
;; When the first undo batch in an undo list is longer than undo-outer-limit,
  ;; this function gets called to ask the user what to do.
  ;; Garbage collection is inhibited around the call,
  ;; so it had better not do a lot of consing.
  (setq undo-outer-limit-function 'undo-outer-limit-truncate)
  (defun undo-outer-limit-truncate (size)
!   (when (or (null undo-extra-outer-limit)
!           (> size undo-extra-outer-limit))
!     ;; Don't ask the question again unless it gets even bigger.
! ;; This applies, in particular, if the user quits from the question.
!     ;; Such a quit quits out of GC, but something else will call GC
!     ;; again momentarily.  It will call this function again,
!     ;; but we don't want to ask the question again.
!     (setq undo-extra-outer-limit (+ size 50000))
!     (if (let (use-dialog-box)
! (yes-or-no-p (format "Buffer %s undo info is %d bytes long; discard it? "
!                              (buffer-name) size)))
!       (progn (setq buffer-undo-list nil)
!              (setq undo-extra-outer-limit nil)
!              t)
!       nil)))
  
  (defvar shell-command-history nil
    "History list for some commands that read shell commands.")


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