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Require sendmail only at compile time.

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(mail-mode-header-syntax-table): Var deleted.
(mail-abbrev-syntax-table): Init to nil, will compute when needed.
(sendmail-pre-abbrev-expand-hook): Only temporarily change
local-abbrev-table and the syntax table.
Compute mail-abbrev-syntax-table if that has not been done.
This commit is contained in:
Richard M. Stallman 2002-02-06 15:42:34 +00:00
parent 238a5a50e5
commit d075ed70e1
1 changed files with 32 additions and 56 deletions
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88
lisp/mail/mailabbrev.el
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@ -1,6 +1,6 @@
;;; mailabbrev.el --- abbrev-expansion of mail aliases
;; Copyright (C) 1985, 86, 87, 92, 93, 96, 1997, 2000
;; Copyright (C) 1985, 86, 87, 92, 93, 96, 1997, 2000, 2002
;; Free Software Foundation, Inc.
;; Author: Jamie Zawinski <jwz@lucid.com>, now <jwz@jwz.org>
@ -128,7 +128,8 @@
;;; Code:
(require 'sendmail)
(eval-when-compile
(require 'sendmail))
(defgroup mail-abbrev nil
"Expand mail aliases as abbrevs, in certain mail headers."
@ -398,39 +399,11 @@ it will be turned off. (You don't need to worry about continuation lines.)
This should be set to match those mail fields in which you want abbreviations
turned on.")
(defvar mail-mode-header-syntax-table
(let ((tab (copy-syntax-table text-mode-syntax-table)))
;; This makes the characters "@%!._-" be considered symbol-constituents
;; but not word-constituents, so forward-sexp will move you over an
;; entire address, but forward-word will only move you over a sequence
;; of alphanumerics. (Clearly the right thing.)
(modify-syntax-entry ?@ "_" tab)
(modify-syntax-entry ?% "_" tab)
(modify-syntax-entry ?! "_" tab)
(modify-syntax-entry ?. "_" tab)
(modify-syntax-entry ?_ "_" tab)
(modify-syntax-entry ?- "_" tab)
(modify-syntax-entry ?< "(>" tab)
(modify-syntax-entry ?> ")<" tab)
tab)
"The syntax table used in send-mail mode when in a mail-address header.
`mail-mode-syntax-table' is used when the cursor is in the message body or in
non-address headers.")
(defvar mail-abbrev-syntax-table
(let* ((tab (copy-syntax-table mail-mode-header-syntax-table))
(_ (aref (standard-syntax-table) ?_))
(w (aref (standard-syntax-table) ?w)))
(map-char-table
(function (lambda (key value)
(if (equal value _)
(set-char-table-range tab key w))))
tab)
tab)
(defvar mail-abbrev-syntax-table nil
"The syntax-table used for abbrev-expansion purposes.
This is not actually made the current syntax table of the buffer, but
simply controls the set of characters which may be a part of the name
of a mail alias.")
of a mail alias. The value is set up, buffer-local, when first needed.")
(defun mail-abbrev-in-expansion-header-p ()
@ -452,17 +425,18 @@ of a mail alias.")
(defun sendmail-pre-abbrev-expand-hook ()
(and (and mail-abbrevs (not (eq mail-abbrevs t)))
(if (mail-abbrev-in-expansion-header-p)
(progn
;;
;; We are in a To: (or CC:, or whatever) header, and
;; should use word-abbrevs to expand mail aliases.
;; We are in a To: (or CC:, or whatever) header, and
;; should use word-abbrevs to expand mail aliases.
(let ((local-abbrev-table mail-abbrevs)
(old-syntax-table (syntax-table)))
;; Before anything else, resolve aliases if they need it.
(and mail-abbrev-aliases-need-to-be-resolved
(mail-resolve-all-aliases))
;; Now proceed with the abbrev section.
;; - First, install the mail-abbrevs as the word-abbrev table.
;; - We already installed mail-abbrevs as the abbrev table.
;; - Then install the mail-abbrev-syntax-table, which
;; temporarily marks all of the
;; non-alphanumeric-atom-characters (the "_"
@ -472,47 +446,49 @@ of a mail alias.")
;; the purpose of abbrev expansion.
;; - Then we call expand-abbrev again, recursively, to do
;; the abbrev expansion with the above syntax table.
;; - Restore the previous syntax table.
;; - Then we do a trick which tells the expand-abbrev frame
;; which invoked us to not continue (and thus not
;; expand twice.) This means that any abbrev expansion
;; will happen as a result of this function's call to
;; expand-abbrev, and not as a result of the call to
;; expand-abbrev which invoked *us*.
;; - Then we set the syntax table to
;; mail-mode-header-syntax-table, which doesn't have
;; anything to do with abbrev expansion, but
;; is just for the user's convenience (see its doc string.)
;;
(setq local-abbrev-table mail-abbrevs)
(make-local-variable 'mail-abbrev-syntax-table)
(unless mail-abbrev-syntax-table
(let ((tab (copy-syntax-table old-syntax-table))
(_ (aref (standard-syntax-table) ?_))
(w (aref (standard-syntax-table) ?w)))
(map-char-table
(function (lambda (key value)
(if (equal value _)
(set-char-table-range tab key w))))
tab)
(setq mail-abbrev-syntax-table tab)))
;; If the character just typed was non-alpha-symbol-syntax,
;; then don't expand the abbrev now (that is, don't expand
;; when the user types -.) Check the character's syntax in
;; the mail-mode-header-syntax-table.
;; the usual syntax table.
(set-syntax-table mail-mode-header-syntax-table)
(or (and (integerp last-command-char)
(eq (char-syntax last-command-char) ?_))
(let ((pre-abbrev-expand-hook nil)) ; That's us; don't loop.
;; Use this table so that abbrevs can have hyphens in them.
(set-syntax-table mail-abbrev-syntax-table)
(expand-abbrev)
;; Now set it back to what it was before.
(set-syntax-table mail-mode-header-syntax-table)))
(unwind-protect
(expand-abbrev)
;; Now set it back to what it was before.
(set-syntax-table old-syntax-table))))
(setq abbrev-start-location (point-max) ; This is the trick.
abbrev-start-location-buffer (current-buffer)))
(if (or (not mail-abbrevs-only)
(eq this-command 'expand-abbrev))
(progn
;; We're not in a mail header where mail aliases should
;; be expanded, then use the normal mail-mode abbrev table
;; (if any) and the normal mail-mode syntax table.
(setq local-abbrev-table (and (boundp 'mail-mode-abbrev-table)
mail-mode-abbrev-table))
(set-syntax-table mail-mode-syntax-table))
;; We're not in a mail header where mail aliases should
;; be expanded, then use the normal mail-mode abbrev table
;; (if any) and the normal mail-mode syntax table.
nil
;; This is not a mail abbrev, and we should not expand it.
;; This kludge stops expand-abbrev from doing anything.
(setq abbrev-start-location (point-max)