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Re: Moving between headers in message-mode
From: |
Emanuel Berg |
Subject: |
Re: Moving between headers in message-mode |
Date: |
Wed, 19 Jun 2013 00:17:44 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.4 (gnu/linux) |
Did I correctly boil it down to:
1) Don't use setq
2) Don't use let let unless you complete the name-value
association (i.e., don't set it up to be assigned later)
(As for style, I haven't got around to that, will do. I *think* I
picked up mine mostly from a book called "The Land of Lisp".)
What do you think of:
;; separator
(set-variable 'mail-header-separator "---")
(set-face-attribute 'message-separator nil :foreground "black")
(defun do-nothing () "Do nothing." () )
(defun iterate-header (separator-pos
search-fun
start-pos end-pos
chars-forward-after-hit
maybe-beginning-of-line)
"Unless BACK, go to the next header input field:
either on the same line as the present point,
or the next header below.
If the field has a string, put point to the string's right;
if the field is empty, put point so that typing will set the header,
without any prior cursor movement.
If you move from a header which has data, that data is expanded if
found to be an `abbrev-mode' abbreviation (possibly setup in
~/.mailrc), without need for a whitespace.
If there are no headers left, `message-goto-body';
if already in the body, goto the topmost header."
(interactive)
(let ((position (point)))
(if (< position separator-pos)
(progn
(goto-char position)
(expand-abbrev) )
(goto-char start-pos) )
(funcall maybe-beginning-of-line)
(if (not (funcall search-fun ":" end-pos t))
(message-goto-body)
(progn
(forward-char chars-forward-after-hit)
(end-of-line) ))))
(defun get-separator-pos ()
"Get the position of `mail-header-separator'."
(save-excursion
(goto-char (point-min))
(search-forward mail-header-separator)
(point) ))
(defun iterate-header-back ()
"See `iterate-header'."
(interactive)
(let ((separator-pos (get-separator-pos)))
(iterate-header
separator-pos
'search-backward
separator-pos (point-min)
2
'beginning-of-line) ))
(defun iterate-header-next ()
"See `iterate-header'."
(interactive)
(let ((separator-pos (get-separator-pos)))
(iterate-header
separator-pos
'search-forward
(point-min) separator-pos
1
'do-nothing) ))
(define-key message-mode-map (kbd "TAB") 'iterate-header-next)
(define-key message-mode-map (kbd "<backtab>") 'iterate-header-back)
--
Emanuel Berg - programmer (hire me! CV below)
computer projects: http://user.it.uu.se/~embe8573
internet activity: http://home.student.uu.se/embe8573
Re: Moving between headers in message-mode, Stefan Monnier, 2013/06/19