[Mew-dist 09897] Re: request for mew-user-agent-compose

1999年 7月 30日 (金) 14:09:43 JST

At around Fri, 30 Jul 1999 13:48:56 +0900,
 Hideyuki SHIRAI (白井秀行) <shirai at example.com> may have mentioned:

> From: sen_ml at example.com <sen_ml at example.com> さん曰く
> Subject: [Mew-dist 09892] Re: request for mew-user-agent-compose
> Message-ID: <19990730132533V.1001 at example.com>
> Date: Fri, 30 Jul 1999 13:26:14 +0900
> 
> sen> ＃ いま mew-mailto.el を変更しているところです。できあがったら送ります。
> 
> mew-browse.el は変更したので送ります。:-)

あとで試してみます (^^)

mew-mailto.el を変更しました。rfc2368.el というものに依存する様になりました。
添付します。mailto.el がもういらなくなるはずです (というか、rfc2368.el は
replacement だと思って下さい)。

＃ rfc2368.el は Emacs の一部になる予定です。いま FSF とそこらへんの
やりとりをしています。

sen_ml ＠何でこういう日に限って時間が少ないの (; ;)

-------------- next part --------------
;;; -*- emacs-lisp -*-
;;;
;;; name: mew-mailto.el
;;; version: 0.6
;;; description: some mailto support for mew
;;; creation date: 1998-11-07
;;; author: "Sen Nagata" <sen at example.com>
;;; warning: not optimized at all

;;; required:
;;;
;;;   -mew (1.94 and up -- uses mew-user-agent-compose)
;;;   -rfc2368.el
;;;   -thingatpt.el (comes w/ emacs) for thing-at-pt

;;; installation:
;;;
;;;   -put this file (and rfc2368.el) in an appropriate directory (so emacs 
;;;    can find it)
;;;
;;;   <necessary>
;;;   -put:
;;;
;;;     (add-hook 'mew-init-hook (lambda () (require 'mew-mailto)))
;;;
;;;    in your .emacs file.

;;; details:
;;;
;;;   this package provides a number of interactive functions
;;; (commands) for the user.  each of the commands ultimately creates a
;;; draft message based on some information.  the names of the commands
;;; and brief descriptions are:
;;;
;;;     1) mew-mailto-compose-message-from-mailto-url
;;;            make a draft message from a user-specified mailto: url
;;;
;;;     2) mew-mailto-compose-message-from-mailto-url-at-point
;;;            make a draft message from a mailto: url at point

;;; usage:
;;;
;;;   -invoke mew
;;;   -try out the commands mentioned above in 'details'

;;; History:
;;
;; 0.6
;;
;; 1999-07-30
;;
;;   fixed a bug in mew-mailto-compose-message-from-mailto-url that could
;;   lead to duplicate headers in messages
;;
;; 1999-06-01
;;
;;   added compatibility garbage for xemacs -- thingatpt.el vs browse-url.el
;;
;; 1999-05-31
;;
;;   rewrote to use rfc2368.el
;;   removed a lot of functionality
;;
;; 0.5
;;
;; 1999-05-04:
;;
;;   modified the interface to mew-mailto-compose-message-from-mailto-url
;; as suggested by Umekichi <umekichi at example.com>.  see the interface
;; to browse-url-mail in browse-url.el for details.

;; how should we handle the dependecy on mew?
;; doing the following seems to have catastrophic effects on my machine :-(
;(require 'mew)

;; will this work?
(eval-when-compile 
  (require 'mew))

(defconst mew-mailto-version "mew-mailto.el 0.6")

;; use rfc2368 support -- should be useable for things other than mew too
(require 'rfc2368)

;; yucky compatibility stuff...
(if (and (string-match "^XEmacs \\([0-9.]+\\)" (emacs-version))
	 (< (string-to-int (match-string 1 (emacs-version))) 21))
    ;; for xemacs versions less than 21, use browse-url.el
    (progn
      (require 'browse-url)
      (fset 'mew-mailto-url-at-point 
	    'browse-url-url-at-point))
  ;; for everything else, use thingatpt.el
  (progn
    (require 'thingatpt)
    (fset 'mew-mailto-url-at-point
	  (lambda () 
	    (thing-at-point 'url)))))

(defun mew-mailto-compose-message-from-mailto-url (url &optional dummy)
  "Compose a messsage from URL.  The optional second argument, DUMMY, exists
to match the interface provided by browse-url-mail -- DUMMY does not do
anything."
  (interactive "sURL: ")
  (if (string-match rfc2368-mailto-regexp url)
      (let* ((other-headers (rfc2368-parse-mailto-url url))
	     ;; the reason i'm bothering to extract To and Subject is
	     ;; because i want them to appear at reasonable places in
	     ;; the headers (not in some random order) -- i'll need to
	     ;; do the same for any other headers that work that way too...
	     (to (cdr (assoc-ignore-case "to" other-headers)))
	     (subject (cdr (assoc-ignore-case "subject" other-headers))))

	;; if these are not removed from other-headers, we will get duplicates
	(remove-alist 'other-headers "To")
	(remove-alist 'other-headers "Subject")

	;; mew doesn't handle specifying a message body via
	;; mew-user-agent-compose yet -- rms said he would support
	;; specifying a body via the compose-mail interface after
	;; emacs 20.4 is released
	(mew-user-agent-compose to subject other-headers))
    (message "Not a mailto: url.")))

;; prepare a message from a mailto: url at point
(defun mew-mailto-compose-message-from-mailto-url-at-point ()
  "Compose a message from a mailto url found at point."
  (interactive)
  (let ((url (mew-mailto-url-at-point)))
    (if (string-match rfc2368-mailto-regexp url)
	(mew-mailto-compose-message-from-mailto-url url)
      ;; tell the user that we didn't find a mailto: url at point
      (message "No mailto: url detected at point."))))

;; since this will be used via 'require'...
(provide 'mew-mailto)

;; end of mew-mailto.el
-------------- next part --------------
;;; rfc2368.el --- support for rfc 2368

;;; Copyright 1999 Sen Nagata <sen at example.com>

;; Keywords: rfc 2368, mailto, mail
;; Version: 0.3
;; License: GPL 2

;; This file is not a part of GNU Emacs.

;;; Commentary:
;;
;; notes:
;;
;;   -repeat after me: "the colon is not part of the header name..."
;;   -if w3 becomes part of emacs, then it may make sense to have this
;;    file depend on w3 -- the maintainer of w3 says merging w/ emacs
;;    is planned!
;;
;; historical note:
;;
;;   this is intended as a replacement for mailto.el
;;
;; acknowledgements:
;;
;;   the functions that deal w/ unhexifying in this file were basically
;; taken from w3 -- i hope to replace them w/ something else soon OR
;; perhaps if w3 becomes a part of emacs soon, use the functions from w3.

;;; History:
;;
;; 0.3:
;;
;;  added the constant rfc2368-version
;;  implemented first potential fix for a bug in rfc2368-mailto-regexp
;;  implemented first potential fix for a bug in rfc2368-parse-mailto
;;  (both bugs reported by Kenichi OKADA)
;;
;; 0.2:
;;
;;  started to use checkdoc
;;
;; 0.1:
;;
;;  initial implementation

;;; Code:
(defconst rfc2368-version "rfc2368.el 0.3")

;; only an approximation?
;; see rfc 1738
(defconst rfc2368-mailto-regexp
  "^\\(mailto:\\)\\([^?]+\\)*\\(\\?\\(.*\\)\\)*"
  "Regular expression to match and aid in parsing a mailto url.")

;; describes 'mailto:'
(defconst rfc2368-mailto-scheme-index 1
  "Describes the 'mailto:' portion of the url.")
;; i'm going to call this part the 'prequery'
(defconst rfc2368-mailto-prequery-index 2
  "Describes the portion of the url between 'mailto:' and '?'.")
;; i'm going to call this part the 'query'
(defconst rfc2368-mailto-query-index 4
  "Describes the portion of the url after '?'.")

;; for dealing w/ unhexifying strings, my preferred approach is to use
;; a 'string-replace-match-using-function' which can perform a
;; string-replace-match and compute the replacement text based on a
;; passed function -- however, emacs doesn't seem to have such a
;; function yet :-(

;; for the moment a rip-off of url-unhex (w3/url.el)
(defun rfc2368-unhexify-char (char)
  "Unhexify CHAR -- e.g. %20 -> <SPC>."
  (if (> char ?9)
      (if (>= char ?a)
	  (+ 10 (- char ?a))
	(+ 10 (- char ?A)))
    (- char ?0)))

;; for the moment a rip-off of url-unhex-string (w3/url.el) (slightly modified)
(defun rfc2368-unhexify-string (string)
  "Unhexify STRING -- e.g. 'hello%20there' -> 'hello there'."
  (let ((case-fold-search t)
	(result ""))
    (while (string-match "%[0-9a-f][0-9a-f]" string)
      (let* ((start (match-beginning 0))
	     (hex-code (+ (* 16
			     (rfc2368-unhexify-char (elt string (+ start 1))))
			  (rfc2368-unhexify-char (elt string (+ start 2))))))
	(setq result (concat
		      result (substring string 0 start)
		      (char-to-string hex-code))
	      string (substring string (match-end 0)))))
    ;; it seems clearer to do things this way than to just return:
    ;; (concat result string)
    (setq result (concat result string))
    result))

(defun rfc2368-parse-mailto-url (mailto-url)
  "Parse MAILTO-URL, and return an alist of header-name, header-value pairs.
MAILTO-URL should be a RFC 2368 (mailto) compliant url.  A cons cell w/ a
key of 'Body' is a special case and is considered a header for this purpose.
The returned alist is intended for use w/ the `compose-mail' interface.
Note: make sure MAILTO-URL has been 'unhtmlized' (e.g. &amp; -> &), before
calling this function."
  (let ((case-fold-search t)
	prequery query headers-alist)

    (if (string-match rfc2368-mailto-regexp mailto-url)
	(progn

	  (setq prequery
		(match-string rfc2368-mailto-prequery-index mailto-url))

	  (setq query
		(match-string rfc2368-mailto-query-index mailto-url))

	  ;; build alist of header name-value pairs
	  (if (not (null query))
	      (setq headers-alist
		    (mapcar
		     (lambda (x)
		       (let* ((temp-list (split-string x "="))
			      (header-name (car temp-list))
			      (header-value (cadr temp-list)))
			 ;; return ("Header-Name" . "header-value")
			 (cons
			  (capitalize (rfc2368-unhexify-string header-name))
			  (rfc2368-unhexify-string header-value))))
		     (split-string query "&"))))

	  ;; deal w/ multiple 'To' recipients
	  (if prequery
	      (progn
		(if (assoc "To" headers-alist)
		    (let* ((our-cons-cell
			    (assoc "To" headers-alist))
			   (our-cdr
			    (cdr our-cons-cell)))
		      (setcdr our-cons-cell (concat our-cdr ", " prequery)))
		  (setq headers-alist
			(cons (cons "To" prequery) headers-alist)))))

	  headers-alist)

      (error "Failed to match a mailto: url"))
    ))

(provide 'rfc2368)

;;; rfc2368.el ends here