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* lisp/whitespace.el (whitespace-enable-predicate): New variable.

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(whitespace-enable-predicate): Use it.
This commit is contained in:
Stefan Monnier 2013-03-10 17:39:11 -04:00
parent d0ebc8269f
commit 33f5bc1cbc
2 changed files with 26 additions and 21 deletions
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3
lisp/ChangeLog
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@ -1,5 +1,8 @@
2013-03-10 Stefan Monnier <monnier@iro.umontreal.ca>
* whitespace.el (whitespace-enable-predicate): New variable.
(whitespace-enable-predicate): Use it.
* comint.el (comint-send-input, comint-snapshot-last-prompt)
(comint-output-filter, comint-update-fence):
Use with-silent-modifications.

44
lisp/whitespace.el
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@ -1145,29 +1145,31 @@ See also `whitespace-style', `whitespace-newline' and
(unless whitespace-mode
(whitespace-turn-off)))))))
(defvar whitespace-enable-predicate
(lambda ()
(and (cond
((eq whitespace-global-modes t))
((listp whitespace-global-modes)
(if (eq (car-safe whitespace-global-modes) 'not)
(not (memq major-mode (cdr whitespace-global-modes)))
(memq major-mode whitespace-global-modes)))
(t nil))
;; ...we have a display (we're running a batch job)
(not noninteractive)
;; ...the buffer is not internal (name starts with a space)
(not (eq (aref (buffer-name) 0) ?\ ))
;; ...the buffer is not special (name starts with *)
(or (not (eq (aref (buffer-name) 0) ?*))
;; except the scratch buffer.
(string= (buffer-name) "*scratch*"))))
"Predicate to decide which buffers obey `global-whitespace-mode'.
This function is called with no argument and should return non-nil
if the current buffer should obey `global-whitespace-mode'.
This variable is normally modified via `add-function'.")
(defun whitespace-turn-on-if-enabled ()
(when (cond
((eq whitespace-global-modes t))
((listp whitespace-global-modes)
(if (eq (car-safe whitespace-global-modes) 'not)
(not (memq major-mode (cdr whitespace-global-modes)))
(memq major-mode whitespace-global-modes)))
(t nil))
(let (inhibit-quit)
;; Don't turn on whitespace mode if...
(or
;; ...we don't have a display (we're running a batch job)
noninteractive
;; ...or if the buffer is invisible (name starts with a space)
(eq (aref (buffer-name) 0) ?\ )
;; ...or if the buffer is temporary (name starts with *)
(and (eq (aref (buffer-name) 0) ?*)
;; except the scratch buffer.
(not (string= (buffer-name) "*scratch*")))
;; Otherwise, turn on whitespace mode.
(whitespace-turn-on)))))
(when (funcall whitespace-enable-predicate)
(whitespace-turn-on)))
;;;###autoload
(define-minor-mode global-whitespace-newline-mode