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(auto-revert-handler): In `auto-revert-tail-mode',

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check only for changed size.
(auto-revert-tail-handler): Get size from caller.  If the file has
shrunk, tail the whole file again (the file presumably has been
rewritten).
This commit is contained in:
David Kastrup 2007-09-30 20:26:55 +00:00
parent b616a212d4
commit fdc31e1d38
2 changed files with 20 additions and 8 deletions
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6
lisp/ChangeLog
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@ -1,5 +1,11 @@
2007-09-30 David Kastrup <dak@gnu.org>
* autorevert.el (auto-revert-handler): In `auto-revert-tail-mode',
check only for changed size.
(auto-revert-tail-handler): Get size from caller. If the file has
shrunk, tail the whole file again (the file presumably has been
rewritten).
* woman.el (woman-topic-all-completions, woman-mini-help): Fix
fallout from 2007-09-07 introduction of `dolist' when the list
actually was being manipulated in the loop.

22
lisp/autorevert.el
View File

@ -416,12 +416,16 @@ will use an up-to-date value of `auto-revert-interval'"
"Revert current buffer, if appropriate.
This is an internal function used by Auto-Revert Mode."
(when (or auto-revert-tail-mode (not (buffer-modified-p)))
(let* ((buffer (current-buffer))
(let* ((buffer (current-buffer)) size
(revert
(or (and buffer-file-name
(not (file-remote-p buffer-file-name))
(file-readable-p buffer-file-name)
(not (verify-visited-file-modtime buffer)))
(if auto-revert-tail-mode
(/= auto-revert-tail-pos
(setq size
(nth 7 (file-attributes buffer-file-name))))
(not (verify-visited-file-modtime buffer))))
(and (or auto-revert-mode
global-auto-revert-non-file-buffers)
revert-buffer-function
@ -445,7 +449,7 @@ This is an internal function used by Auto-Revert Mode."
(push window eoblist)))
'no-mini t))
(if auto-revert-tail-mode
(auto-revert-tail-handler)
(auto-revert-tail-handler size)
;; Bind buffer-read-only in case user has done C-x C-q,
;; so as not to forget that. This gives undesirable results
;; when the file's mode changes, but that is less common.
@ -460,20 +464,22 @@ This is an internal function used by Auto-Revert Mode."
(when (or revert auto-revert-check-vc-info)
(vc-find-file-hook)))))
(defun auto-revert-tail-handler ()
(let ((size (nth 7 (file-attributes buffer-file-name)))
(modified (buffer-modified-p))
(defun auto-revert-tail-handler (size)
(let ((modified (buffer-modified-p))
(inhibit-read-only t) ; Ignore.
(file buffer-file-name)
(buffer-file-name nil)) ; Ignore that file has changed.
(when (> size auto-revert-tail-pos)
(when (/= auto-revert-tail-pos size)
(run-hooks 'before-revert-hook)
(undo-boundary)
(save-restriction
(widen)
(save-excursion
(goto-char (point-max))
(insert-file-contents file nil auto-revert-tail-pos size)))
(insert-file-contents file nil
(and (< auto-revert-tail-pos size)
auto-revert-tail-pos)
size)))
(run-hooks 'after-revert-hook)
(undo-boundary)
(setq auto-revert-tail-pos size)