From: "Óscar Fuentes" <ofv@wanadoo.es>
To: emacs-devel@gnu.org
Subject: Proposal: diff-remove-trailing-blanks
Date: Sat, 26 Apr 2008 16:59:34 +0200 [thread overview]
Message-ID: <ve24ach5.fsf@telefonica.net> (raw)
Some time ago Steffan suggested that this function could be a worth
addition to diff-mode. If this is ok, I need to sign the copyright
papers.
(defun diff-remove-trailing-blanks ()
"When on a buffer that contains a diff, inspects the
differences and removes trailing whitespace (spaces, tabs) from
the lines modified or introduced by this diff. Shows a message
with the name of the altered buffers, which are unsaved. If a
file referenced on the diff has no buffer and needs to be fixed,
a buffer visiting that file is created."
(interactive)
(goto-char (point-min))
;; We assume that the diff header has no trailing whitespace.
(setq modified-buffers nil)
(setq white-positions nil)
(while (re-search-forward "^[+!>].*[ \t]+$" (point-max) t)
(save-excursion
(destructuring-bind (buf line-offset pos src dst &optional switched)
(diff-find-source-location t t)
(when line-offset
(set-buffer buf)
(save-excursion
(goto-char (+ (car pos) (cdr src)))
(beginning-of-line)
(when (re-search-forward "\\([ \t]+\\)$" (line-end-position) t)
(when (not (member buf modified-buffers))
(push buf modified-buffers))
(goto-char (match-end 0))
(push (point-marker) white-positions)
(goto-char (match-beginning 0))
(push (point-marker) white-positions)
(push buf white-positions)))))))
(while white-positions
(save-excursion
(set-buffer (pop white-positions))
(delete-region (pop white-positions) (pop white-positions))))
(if modified-buffers
(let ((msg "Deleted new trailing whitespace from:"))
(dolist (f modified-buffers)
(setq msg (concat msg " `" (buffer-name f) "'")))
(message "%s" msg))
(message "No fixes needed.")))
next reply other threads:[~2008-04-26 14:59 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-26 14:59 Óscar Fuentes [this message]
2008-04-26 18:44 ` Proposal: diff-remove-trailing-blanks Dan Nicolaescu
2008-04-26 19:38 ` Óscar Fuentes
2008-04-26 19:50 ` Vinicius Jose Latorre
2008-04-26 20:08 ` Óscar Fuentes
[not found] ` <4813A244.4050908@ig.com.br>
2008-04-26 22:07 ` Óscar Fuentes
2008-04-27 2:30 ` Vinicius Jose Latorre
2008-04-27 2:59 ` Vinicius Jose Latorre
2008-04-27 4:04 ` Óscar Fuentes
[not found] ` <48146DF3.3090706@ig.com.br>
[not found] ` <48147BC0.6080406@ig.com.br>
2008-04-27 15:15 ` Óscar Fuentes
2008-04-27 17:30 ` Vinicius Jose Latorre
2008-04-27 20:05 ` Óscar Fuentes
2008-05-01 0:34 ` Vinicius Jose Latorre
2008-05-01 1:04 ` Óscar Fuentes
2008-05-02 14:22 ` Stefan Monnier
2008-05-07 0:25 ` Vinicius Jose Latorre
2008-05-07 2:04 ` Stefan Monnier
2008-05-10 0:45 ` Vinicius Jose Latorre
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