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Annotation of 43BSDReno/contrib/emacs-18.55/lisp/mail-utils.el, revision 1.1

1.1     ! root        1: ;; Utility functions used both by rmail and rnews
        !             2: ;; Copyright (C) 1985 Free Software Foundation, Inc.
        !             3: 
        !             4: ;; This file is part of GNU Emacs.
        !             5: 
        !             6: ;; GNU Emacs is distributed in the hope that it will be useful,
        !             7: ;; but WITHOUT ANY WARRANTY.  No author or distributor
        !             8: ;; accepts responsibility to anyone for the consequences of using it
        !             9: ;; or for whether it serves any particular purpose or works at all,
        !            10: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
        !            11: ;; License for full details.
        !            12: 
        !            13: ;; Everyone is granted permission to copy, modify and redistribute
        !            14: ;; GNU Emacs, but only under the conditions described in the
        !            15: ;; GNU Emacs General Public License.   A copy of this license is
        !            16: ;; supposed to have been given to you along with GNU Emacs so you
        !            17: ;; can know your rights and responsibilities.  It should be in a
        !            18: ;; file named COPYING.  Among other things, the copyright notice
        !            19: ;; and this notice must be preserved on all copies.
        !            20: 
        !            21: 
        !            22: (provide 'mail-utils)
        !            23:                     
        !            24: ;; should be in loaddefs
        !            25: (defvar mail-use-rfc822 nil
        !            26:   "*If non-nil, use a full, hairy RFC822 parser on mail addresses.
        !            27: Otherwise, (the default) use a smaller, somewhat faster and
        !            28: often-correct parser.")
        !            29: 
        !            30: (defun mail-string-delete (string start end)
        !            31:   "Returns a string containing all of STRING except the part
        !            32: from START (inclusive) to END (exclusive)."
        !            33:   (if (null end) (substring string 0 start)
        !            34:     (concat (substring string 0 start)
        !            35:            (substring string end nil))))
        !            36: 
        !            37: (defun mail-strip-quoted-names (address)
        !            38:   "Delete comments and quoted strings in an address list ADDRESS.
        !            39: Also delete leading/trailing whitespace and replace FOO <BAR> with just BAR.
        !            40: Return a modified address list."
        !            41:   (if mail-use-rfc822
        !            42:       (progn (require 'rfc822)
        !            43:             (mapconcat 'identity (rfc822-addresses address) ", "))
        !            44:     (let (pos)
        !            45:      (string-match "\\`[ \t\n]*" address)
        !            46:      ;; strip surrounding whitespace
        !            47:      (setq address (substring address
        !            48:                              (match-end 0)
        !            49:                              (string-match "[ \t\n]*\\'" address
        !            50:                                            (match-end 0))))
        !            51:      ;; strip rfc822 comments
        !            52:      (while (setq pos (string-match 
        !            53:                        ;; This doesn't hack rfc822 nested comments
        !            54:                        ;;  `(xyzzy (foo) whinge)' properly.  Big deal.
        !            55:                        "[ \t]*(\\([^)\"\\]\\|\\\\.\\|\\\\\n\\)*)"
        !            56:                        address))
        !            57:        (setq address
        !            58:             (mail-string-delete address
        !            59:                                 pos (match-end 0))))
        !            60:      ;; strip `quoted' names (This is supposed to hack `"Foo Bar" <bar@host>')
        !            61:      (setq pos 0)
        !            62:      (while (setq pos (string-match
        !            63:                        "[ \t]*\"\\([^\"\\]\\|\\\\.\\|\\\\\n\\)*\"[ \t\n]*"
        !            64:                        address pos))
        !            65:        ;; If the next thing is "@", we have "foo bar"@host.  Leave it.
        !            66:        (if (and (> (length address) (match-end 0))
        !            67:                (= (aref address (match-end 0)) ?@))
        !            68:           (setq pos (match-end 0))
        !            69:         (setq address
        !            70:               (mail-string-delete address
        !            71:                                   pos (match-end 0)))))
        !            72:      ;; Retain only part of address in <> delims, if there is such a thing.
        !            73:      (while (setq pos (string-match "\\(,\\|\\`\\)[^,]*<\\([^>,]*>\\)"
        !            74:                                    address))
        !            75:        (let ((junk-beg (match-end 1))
        !            76:             (junk-end (match-beginning 2))
        !            77:             (close (match-end 0)))
        !            78:         (setq address (mail-string-delete address (1- close) close))
        !            79:         (setq address (mail-string-delete address junk-beg junk-end))))
        !            80:      address)))
        !            81:   
        !            82: (or (and (boundp 'rmail-default-dont-reply-to-names)
        !            83:         (not (null rmail-default-dont-reply-to-names)))
        !            84:     (setq rmail-default-dont-reply-to-names "info-"))
        !            85: 
        !            86: ; rmail-dont-reply-to-names is defined in loaddefs
        !            87: (defun rmail-dont-reply-to (userids)
        !            88:   "Returns string of mail addresses USERIDS sans any recipients
        !            89: that start with matches for  rmail-dont-reply-to-names.
        !            90: Usenet paths ending in an element that matches are removed also."
        !            91:   (if (null rmail-dont-reply-to-names)
        !            92:       (setq rmail-dont-reply-to-names
        !            93:            (concat (if rmail-default-dont-reply-to-names
        !            94:                        (concat rmail-default-dont-reply-to-names "\\|")
        !            95:                        "")
        !            96:                    (concat (regexp-quote
        !            97:                              (or (getenv "USER") (getenv "LOGNAME")
        !            98:                                  (user-login-name)))
        !            99:                            "\\>"))))
        !           100:   (let ((match (concat "\\(^\\|,\\)[ \t\n]*\\([^,\n]*!\\|\\)\\("
        !           101:                       rmail-dont-reply-to-names
        !           102:                       "\\)"))
        !           103:        (case-fold-search t)
        !           104:        pos epos)
        !           105:     (while (setq pos (string-match match userids))
        !           106:       (if (> pos 0) (setq pos (1+ pos)))
        !           107:       (setq epos
        !           108:            (if (string-match "[ \t\n,]+" userids (match-end 0))
        !           109:                (match-end 0)
        !           110:              (length userids)))
        !           111:       (setq userids
        !           112:            (mail-string-delete
        !           113:              userids pos epos)))
        !           114:     ;; get rid of any trailing commas
        !           115:     (if (setq pos (string-match "[ ,\t\n]*\\'" userids))
        !           116:        (setq userids (substring userids 0 pos)))
        !           117:     ;; remove leading spaces. they bother me.
        !           118:     (if (string-match "\\s *" userids)
        !           119:        (substring userids (match-end 0))
        !           120:       userids)))
        !           121: 
        !           122: (defun mail-fetch-field (field-name &optional last all)
        !           123:   "Return the value of the header field FIELD.
        !           124: The buffer is expected to be narrowed to just the headers of the message.
        !           125: If 2nd arg LAST is non-nil, use the last such field if there are several.
        !           126: If 3rd arg ALL is non-nil, concatenate all such fields, with commas between."
        !           127:   (save-excursion
        !           128:     (goto-char (point-min))
        !           129:     (let ((case-fold-search t)
        !           130:          (name (concat "^" (regexp-quote field-name) "[ \t]*:[ \t]*")))
        !           131:       (goto-char (point-min))
        !           132:       (if all
        !           133:          (let ((value ""))
        !           134:            (while (re-search-forward name nil t)
        !           135:              (let ((opoint (point)))
        !           136:                (while (progn (forward-line 1)
        !           137:                              (looking-at "[ \t]")))
        !           138:                (setq value (concat value
        !           139:                                    (if (string= value "") "" ", ")
        !           140:                                    (buffer-substring opoint (1- (point)))))))
        !           141:            (and (not (string= value "")) value))
        !           142:        (if (re-search-forward name nil t)
        !           143:            (progn
        !           144:              (if last (while (re-search-forward name nil t)))
        !           145:              (let ((opoint (point)))
        !           146:                (while (progn (forward-line 1)
        !           147:                              (looking-at "[ \t]")))
        !           148:                (buffer-substring opoint (1- (point))))))))))
        !           149: 
        !           150: ;; Parse a list of tokens separated by commas.
        !           151: ;; It runs from point to the end of the visible part of the buffer.
        !           152: ;; Whitespace before or after tokens is ignored,
        !           153: ;; but whitespace within tokens is kept.
        !           154: (defun mail-parse-comma-list ()
        !           155:   (let (accumulated
        !           156:        beg)
        !           157:     (skip-chars-forward " ")
        !           158:     (while (not (eobp))
        !           159:       (setq beg (point))
        !           160:       (skip-chars-forward "^,")
        !           161:       (skip-chars-backward " ")
        !           162:       (setq accumulated
        !           163:            (cons (buffer-substring beg (point))
        !           164:                  accumulated))
        !           165:       (skip-chars-forward "^,")
        !           166:       (skip-chars-forward ", "))
        !           167:     accumulated))
        !           168: 
        !           169: (defun mail-comma-list-regexp (labels)
        !           170:   (let (pos)
        !           171:     (setq pos (or (string-match "[^ \t]" labels) 0))
        !           172:     ;; Remove leading and trailing whitespace.
        !           173:     (setq labels (substring labels pos (string-match "[ \t]*$" labels pos)))
        !           174:     ;; Change each comma to \|, and flush surrounding whitespace.
        !           175:     (while (setq pos (string-match "[ \t]*,[ \t]*" labels))
        !           176:       (setq labels
        !           177:            (concat (substring labels 0 pos)
        !           178:                    "\\|"
        !           179:                    (substring labels (match-end 0))))))
        !           180:   labels)

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