vm / vm-save.el

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;;; Saving and piping messages under VM
;;; Copyright (C) 1989, 1990, 1993, 1994 Kyle E. Jones
;;;
;;; This program is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 1, or (at your option)
;;; any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program; if not, write to the Free Software
;;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

(provide 'vm-save)

;; (match-data) returns the match data as MARKERS, often corrupting
;; it in the process due to buffer narrowing, and the fact that buffers are
;; indexed from 1 while strings are indexed from 0. :-(
(defun vm-match-data ()
  (let ((n (1- (/ (length (match-data)) 2)))
        (list nil))
    (while (>= n 0)
      (setq list (cons (match-beginning n) 
                       (cons (match-end n) list))
            n (1- n)))
    list))

(defun vm-auto-select-folder (mp auto-folder-alist)
  (condition-case error-data
      (catch 'match
	(let (header alist tuple-list)
	  (setq alist auto-folder-alist)
	  (while alist
	    (setq header (vm-get-header-contents (car mp) (car (car alist))
						 ", "))
	    (if (null header)
		()
	      (setq tuple-list (cdr (car alist)))
	      (while tuple-list
		(if (let ((case-fold-search vm-auto-folder-case-fold-search))
		      (string-match (car (car tuple-list)) header))
		    ;; Don't waste time eval'ing an atom.
		    (if (stringp (cdr (car tuple-list)))
			(throw 'match (cdr (car tuple-list)))
		      (let* ((match-data (vm-match-data))
			     ;; allow this buffer to live forever
			     (buf (get-buffer-create " *vm-auto-folder*"))
			     (result))
			;; Set up a buffer that matches our cached
			;; match data.
			(save-excursion
			  (set-buffer buf)
			  (if vm-fsfemacs-mule-p
			      (set-buffer-multibyte nil))
			  (widen)
			  (erase-buffer)
			  (insert header)
			  ;; It appears that get-buffer-create clobbers the
			  ;; match-data.
			  ;;
			  ;; The match data is off by one because we matched
			  ;; a string and Emacs indexes strings from 0 and
			  ;; buffers from 1.
			  ;;
			  ;; Also store-match-data only accepts MARKERS!!
			  ;; AUGHGHGH!!
			  (store-match-data
			   (mapcar
			    (function (lambda (n) (and n (vm-marker n))))
			    (mapcar
			     (function (lambda (n) (and n (1+ n))))
			     match-data)))
			  (setq result (eval (cdr (car tuple-list))))
			  (while (consp result)
			    (setq result (vm-auto-select-folder mp result)))
			  (if result
			      (throw 'match result))))))
		(setq tuple-list (cdr tuple-list))))
	    (setq alist (cdr alist)))
	  nil ))
    (error (error "error processing vm-auto-folder-alist: %s"
		  (prin1-to-string error-data)))))

(defun vm-auto-archive-messages (&optional arg)
  "Save all unfiled messages that auto-match a folder via
vm-auto-folder-alist to their appropriate folders.  Messages that
are flagged for deletion are not saved.

Prefix arg means to ask user for confirmation before saving each message.

When invoked on marked messages (via vm-next-command-uses-marks),
only marked messages are checked against vm-auto-folder-alist.

The saved messages are flagged as `filed'."
  (interactive "P")
  (vm-select-folder-buffer)
  (vm-check-for-killed-summary)
  (vm-error-if-folder-empty)
  (message "Archiving...")
  (let ((auto-folder)
	(archived 0))
    (unwind-protect
	;; Need separate (let ...) so vm-message-pointer can
	;; revert back in time for
	;; (vm-update-summary-and-mode-line).
	;; vm-last-save-folder is tucked away here since archives
	;; shouldn't affect its value.
	(let ((vm-message-pointer
	       (if (eq last-command 'vm-next-command-uses-marks)
		   (vm-select-marked-or-prefixed-messages 0)
		 vm-message-list))
	      (done nil)
	      stop-point
	      (vm-last-save-folder vm-last-save-folder)
	      (vm-move-after-deleting nil))
	  ;; mark the place where we should stop.  otherwise if any
	  ;; messages in this folder are archived to this folder
	  ;; we would file messages into this folder forever.
	  (setq stop-point (vm-last vm-message-pointer))
	  (while (not done)
	    (and (not (vm-filed-flag (car vm-message-pointer)))
		 ;; don't archive deleted messages
		 (not (vm-deleted-flag (car vm-message-pointer)))
		 (setq auto-folder (vm-auto-select-folder
				    vm-message-pointer
				    vm-auto-folder-alist))
		 ;; Don't let user archive into the same folder
		 ;; that they are visiting.
		 (not (eq (vm-get-file-buffer auto-folder)
			  (current-buffer)))
		 (or (null arg)
		     (y-or-n-p
		      (format "Save message %s in folder %s? "
			      (vm-number-of (car vm-message-pointer))
			      auto-folder)))
		 (let ((vm-delete-after-saving vm-delete-after-archiving)
		       (last-command 'vm-auto-archive-messages))
		   (vm-save-message auto-folder)
		   (vm-increment archived)
		   (message "%d archived, still working..." archived)))
	    (setq done (eq vm-message-pointer stop-point)
		  vm-message-pointer (cdr vm-message-pointer))))
      ;; fix mode line
      (intern (buffer-name) vm-buffers-needing-display-update)
      (vm-update-summary-and-mode-line))
    (if (zerop archived)
	(message "No messages were archived")
      (message "%d message%s archived"
	       archived (if (= 1 archived) "" "s")))))

(defun vm-save-message (folder &optional count)
  "Save the current message to a mail folder.
If the folder already exists, the message will be appended to it.

Prefix arg COUNT means save this message and the next COUNT-1
messages.  A negative COUNT means save this message and the
previous COUNT-1 messages.

When invoked on marked messages (via vm-next-command-uses-marks),
all marked messages in the current folder are saved; other messages are
ignored.

The saved messages are flagged as `filed'."
  (interactive
   (list
    ;; protect value of last-command
    (let ((last-command last-command)
	  (this-command this-command))
      (vm-follow-summary-cursor)
      (let ((default (save-excursion
		       (vm-select-folder-buffer)
		       (vm-check-for-killed-summary)
		       (vm-error-if-folder-empty)
		       (or (vm-auto-select-folder vm-message-pointer
						  vm-auto-folder-alist)
			   vm-last-save-folder)))
	    (dir (or vm-folder-directory default-directory)))
	(cond ((and default
		    (let ((default-directory dir))
		      (file-directory-p default)))
	       (vm-read-file-name "Save in folder: " dir nil nil default))
	      (default
	       (vm-read-file-name
		(format "Save in folder: (default %s) " default)
		dir default))
	      (t
	       (vm-read-file-name "Save in folder: " dir nil)))))
    (prefix-numeric-value current-prefix-arg)))
  (let (auto-folder unexpanded-folder)
    (vm-select-folder-buffer)
    (vm-check-for-killed-summary)
    (vm-error-if-folder-empty)
    (setq unexpanded-folder folder
	  auto-folder (vm-auto-select-folder vm-message-pointer
					     vm-auto-folder-alist))
    (vm-display nil nil '(vm-save-message) '(vm-save-message))
    (or count (setq count 1))
    ;; Expand the filename, forcing relative paths to resolve
    ;; into the folder directory.
    (let ((default-directory
	    (expand-file-name (or vm-folder-directory default-directory))))
      (setq folder (expand-file-name folder)))
    ;; Confirm new folders, if the user requested this.
    (if (and vm-confirm-new-folders (interactive-p)
	     (not (file-exists-p folder))
	     (or (not vm-visit-when-saving) (not (vm-get-file-buffer folder)))
	     (not (y-or-n-p (format "%s does not exist, save there anyway? "
				    folder))))
	(error "Save aborted"))
    ;; Check and see if we are currently visiting the folder
    ;; that the user wants to save to.
    (if (and (not vm-visit-when-saving) (vm-get-file-buffer folder))
	(error "Folder %s is being visited, cannot save." folder))
    (let ((mlist (vm-select-marked-or-prefixed-messages count))
	  (m nil) (count 0) folder-buffer target-type)
      (cond ((and mlist (eq vm-visit-when-saving t))
	     (setq folder-buffer (or (vm-get-file-buffer folder)
				     ;; avoid letter bombs
				     (let ((inhibit-local-variables t)
					   (enable-local-eval nil)
					   (enable-local-variables nil))
				       (find-file-noselect folder)))))
	    ((and mlist vm-visit-when-saving)
	     (setq folder-buffer (vm-get-file-buffer folder))))
      (if (and mlist vm-check-folder-types)
	  (progn
	    (setq target-type (or (vm-get-folder-type folder)
				  vm-default-folder-type
				  (and mlist
				       (vm-message-type-of (car mlist)))))
	    (if (eq target-type 'unknown)
		(error "Folder %s's type is unrecognized" folder))))
      ;; if target folder is empty or nonexistent we need to
      ;; write out the folder header first.
      (if mlist
	  (let ((attrs (file-attributes folder)))
	    (if (or (null attrs) (= 0 (nth 7 attrs)))
		(if (null folder-buffer)
		    (vm-write-string folder (vm-folder-header target-type))
		  (vm-write-string folder-buffer
				   (vm-folder-header target-type))))))
      (save-excursion
	(while mlist
	  (setq m (vm-real-message-of (car mlist)))
	  (set-buffer (vm-buffer-of m))
	  (vm-save-restriction
	   (widen)
	   ;; have to stuff the attributes in all cases because
	   ;; the deleted attribute may have been stuffed
	   ;; previously and we don't want to save that attribute.
	   ;; also we don't want to save out the cached summary entry.
	   (vm-stuff-attributes m t)
	   (if (null folder-buffer)
	       (if (or (null vm-check-folder-types)
		       (eq target-type (vm-message-type-of m)))
		   (write-region (vm-start-of m)
				 (vm-end-of m)
				 folder t 'quiet)
		 (if (null vm-convert-folder-types)
		     (if (not (vm-virtual-message-p (car mlist)))
			 (error "Folder type mismatch: %s, %s"
				(vm-message-type-of m) target-type)
		       (error "Message %s type mismatches folder %s"
			      (vm-number-of (car mlist))
			      folder
			      (vm-message-type-of m)
			      target-type))
		   (vm-write-string
		    folder
		    (vm-leading-message-separator target-type m t))
		   (if (eq target-type 'From_-with-Content-Length)
		       (vm-write-string
			folder
			(concat vm-content-length-header " "
				(vm-su-byte-count m) "\n")))
		   (write-region (vm-headers-of m)
				 (vm-text-end-of m)
				 folder t 'quiet)
		   (vm-write-string
		    folder
		    (vm-trailing-message-separator target-type))))
	     (save-excursion
	       (set-buffer folder-buffer)
	       ;; if the buffer is a live VM folder
	       ;; honor vm-folder-read-only.
	       (if vm-folder-read-only
		   (signal 'folder-read-only (list (current-buffer))))
	       (let ((buffer-read-only nil))
		 (vm-save-restriction
		  (widen)
		  (save-excursion
		    (goto-char (point-max))
		    (if (or (null vm-check-folder-types)
			    (eq target-type (vm-message-type-of m)))
			(insert-buffer-substring
			 (vm-buffer-of m)
			 (vm-start-of m) (vm-end-of m))
		      (if (null vm-convert-folder-types)
			  (if (not (vm-virtual-message-p (car mlist)))
			      (error "Folder type mismatch: %s, %s"
				     (vm-message-type-of m) target-type)
			    (error "Message %s type mismatches folder %s"
				   (vm-number-of (car mlist))
				   folder
				   (vm-message-type-of m)
				   target-type))
			(vm-write-string
			 (current-buffer)
			 (vm-leading-message-separator target-type m t))
			(if (eq target-type 'From_-with-Content-Length)
			    (vm-write-string
			     (current-buffer)
			     (concat vm-content-length-header " "
				     (vm-su-byte-count m) "\n")))
			(insert-buffer-substring (vm-buffer-of m)
						 (vm-headers-of m)
						 (vm-text-end-of m))
			(vm-write-string
			 (current-buffer)
			 (vm-trailing-message-separator target-type)))))
		  ;; vars should exist and be local
		  ;; but they may have strange values,
		  ;; so check the major-mode.
		  (cond ((eq major-mode 'vm-mode)
			 (vm-increment vm-messages-not-on-disk)
			 (vm-clear-modification-flag-undos)))))))
	   (if (null (vm-filed-flag m))
	       (vm-set-filed-flag m t))
	   (vm-increment count)
	   (vm-modify-folder-totals folder 'saved 1 m)
	   (vm-update-summary-and-mode-line)
	   (setq mlist (cdr mlist)))))
      (if m
	  (if folder-buffer
	      (progn
		(save-excursion
		  (set-buffer folder-buffer)
		  (if (eq major-mode 'vm-mode)
		      (progn
			(vm-check-for-killed-summary)
			(vm-assimilate-new-messages)
			(if (null vm-message-pointer)
			    (progn (setq vm-message-pointer vm-message-list
					 vm-need-summary-pointer-update t)
				   (intern (buffer-name)
					   vm-buffers-needing-display-update)
				   (vm-preview-current-message))
			  (vm-update-summary-and-mode-line)))))
		(if (interactive-p)
		    (message "%d message%s saved to buffer %s"
			     count
			     (if (/= 1 count) "s" "")
			     (buffer-name folder-buffer))))
	    (if (interactive-p)
		(message "%d message%s saved to %s"
			 count (if (/= 1 count) "s" "") folder)))))
    (if (or (null vm-last-save-folder)
	    (not (equal unexpanded-folder auto-folder)))
	(setq vm-last-save-folder unexpanded-folder))
    (if vm-delete-after-saving
	(vm-delete-message count))
    folder ))

(defun vm-save-message-sans-headers (file &optional count)
  "Save the current message to a file, without its header section.
If the file already exists, the message body will be appended to it.
Prefix arg COUNT means save the next COUNT message bodiess.  A
negative COUNT means save the previous COUNT bodies.

When invoked on marked messages (via vm-next-command-uses-marks),
only the next COUNT marked messages are saved; other intervening
messages are ignored.

The saved messages are flagged as `written'.

This command should NOT be used to save message to mail folders; use
vm-save-message instead (normally bound to `s')."
  (interactive
   ;; protect value of last-command
   (let ((last-command last-command)
	 (this-command this-command))
     (vm-follow-summary-cursor)
     (vm-select-folder-buffer)
     (list
      (vm-read-file-name
       (if vm-last-written-file
	   (format "Write text to file: (default %s) "
		   vm-last-written-file)
	 "Write text to file: ")
       nil vm-last-written-file nil)
      (prefix-numeric-value current-prefix-arg))))
  (vm-select-folder-buffer)
  (vm-check-for-killed-summary)
  (vm-error-if-folder-empty)
  (vm-display nil nil '(vm-save-message-sans-headers)
	      '(vm-save-message-sans-headers))
  (or count (setq count 1))
  (setq file (expand-file-name file))
  ;; Check and see if we are currently visiting the file
  ;; that the user wants to save to.
  (if (and (not vm-visit-when-saving) (vm-get-file-buffer file))
      (error "File %s is being visited, cannot save." file))
  (let ((mlist (vm-select-marked-or-prefixed-messages count))
	(m nil) file-buffer)
    (cond ((and mlist (eq vm-visit-when-saving t))
	   (setq file-buffer (or (vm-get-file-buffer file)
				 (find-file-noselect file))))
	  ((and mlist vm-visit-when-saving)
	   (setq file-buffer (vm-get-file-buffer file))))
    (if (and (not (memq (vm-get-folder-type file) '(nil unknown)))
	     (not (y-or-n-p "This file looks like a mail folder, append to it anyway? ")))
	(error "Aborted"))
    (save-excursion
      (while mlist
	(setq m (vm-real-message-of (car mlist)))
	(set-buffer (vm-buffer-of m))
	(vm-save-restriction
	 (widen)
	 (if (null file-buffer)
	     (write-region (vm-text-of m)
			   (vm-text-end-of m)
			   file t 'quiet)
	   (let ((start (vm-text-of m))
		 (end (vm-text-end-of m)))
	     (save-excursion
	       (set-buffer file-buffer)
	       (save-excursion
		 (let (buffer-read-only)
		   (vm-save-restriction
		    (widen)
		    (save-excursion
		      (goto-char (point-max))
		      (insert-buffer-substring
		       (vm-buffer-of m)
		       start end))))))))
	(if (null (vm-written-flag m))
	    (vm-set-written-flag m t))
	(vm-update-summary-and-mode-line)
	(setq mlist (cdr mlist)))))
    (if m
	(if file-buffer
	    (message "Message%s written to buffer %s" (if (/= 1 count) "s" "")
		     (buffer-name file-buffer))
	  (message "Message%s written to %s" (if (/= 1 count) "s" "") file)))
    (setq vm-last-written-file file)))

(defun vm-pipe-message-to-command (command prefix-arg)
  "Runs a shell command with some or all of the contents of the
current message as input.
By default, the entire message is used.
With one \\[universal-argument] the text portion of the message is used.
With two \\[universal-argument]'s the header portion of the message is used.
With three \\[universal-argument]'s the visible header portion of the message
  plus the text portion is used.

When invoked on marked messages (via vm-next-command-uses-marks),
each marked message is successively piped to the shell command,
one message per command invocation.

Output, if any, is displayed.  The message is not altered."
  (interactive
   ;; protect value of last-command
   (let ((last-command last-command)
	 (this-command this-command))
     (vm-follow-summary-cursor)
     (vm-select-folder-buffer)
     (list (read-string "Pipe to command: " vm-last-pipe-command)
	   current-prefix-arg)))
  (vm-select-folder-buffer)
  (vm-check-for-killed-summary)
  (vm-error-if-folder-empty)
  (setq vm-last-pipe-command command)
  (let ((buffer (get-buffer-create "*Shell Command Output*"))
	m
	(pop-up-windows (and pop-up-windows (eq vm-mutable-windows t)))
	;; prefix arg doesn't have "normal" meaning here, so only call
	;; vm-select-marked-or-prefixed-messages if we're using marks.
	(mlist (if (eq last-command 'vm-next-command-uses-marks)
		   (vm-select-marked-or-prefixed-messages 0)
		 (list (car vm-message-pointer)))))
    (save-excursion
      (set-buffer buffer)
      (erase-buffer))
    (while mlist
      (setq m (vm-real-message-of (car mlist)))
      (set-buffer (vm-buffer-of m))
      (save-restriction
	(widen)
	(goto-char (vm-headers-of m))
	(cond ((equal prefix-arg nil)
	       (narrow-to-region (point) (vm-text-end-of m)))
	      ((equal prefix-arg '(4))
	       (narrow-to-region (vm-text-of m)
				 (vm-text-end-of m)))
	      ((equal prefix-arg '(16))
	       (narrow-to-region (point) (vm-text-of m)))
	      ((equal prefix-arg '(64))
	       (narrow-to-region (vm-vheaders-of m) (vm-text-end-of m)))
	      (t (narrow-to-region (point) (vm-text-end-of m))))
	(let ((pop-up-windows (and pop-up-windows (eq vm-mutable-windows t)))
	      ;; call-process-region calls write-region.
	      ;; don't let it do CR -> LF translation.
	      (selective-display nil))
	  (call-process-region (point-min) (point-max)
			       (or shell-file-name "sh")
			       nil buffer nil shell-command-switch command)))
      (setq mlist (cdr mlist)))
    (vm-display nil nil '(vm-pipe-message-to-command)
		'(vm-pipe-message-to-command))
    (if (not (zerop (save-excursion (set-buffer buffer) (buffer-size))))
	(display-buffer buffer))))

(defun vm-print-message (&optional count)
  "Print the current message
Prefix arg N means print the current message and the next N - 1 messages.
Prefix arg -N means print the current message and the previous N - 1 messages.

The variable `vm-print-command' controls what command is run to
print the message, and `vm-print-command-switches' is a list of switches
to pass to the command.

When invoked on marked messages (via vm-next-command-uses-marks),
each marked message is printed, one message per vm-print-command invocation.

Output, if any, is displayed.  The message is not altered."
  (interactive "p")
  (vm-follow-summary-cursor)
  (vm-select-folder-buffer)
  (vm-check-for-killed-summary)
  (vm-error-if-folder-empty)
  (or count (setq count 1))
  (let* ((buffer (get-buffer-create "*Shell Command Output*"))
	 (need-tempfile (string-match ".*-.*-\\(win95\\|nt\\)"
				      system-configuration))
	 (tempfile (if need-tempfile (vm-make-tempfile-name)))
	 (command (mapconcat (function identity)
			     (nconc (list vm-print-command)
				    (copy-sequence vm-print-command-switches)
				    (if need-tempfile
					(list tempfile)))
			     " "))
	 (m nil)
	 (pop-up-windows (and pop-up-windows (eq vm-mutable-windows t)))
	 (mlist (vm-select-marked-or-prefixed-messages count)))
    (save-excursion
      (set-buffer buffer)
      (erase-buffer))
    (while mlist
      (setq m (vm-real-message-of (car mlist)))
      (set-buffer (vm-buffer-of m))
      (if (and vm-display-using-mime (vectorp (vm-mm-layout m)))
	  (let ((work-buffer nil))
	    (unwind-protect
		(progn
		  (setq work-buffer (vm-make-work-buffer))
		  (set-buffer work-buffer)
		  (vm-insert-region-from-buffer
		   (vm-buffer-of m) (vm-vheaders-of m) (vm-text-of m))
		  (vm-decode-mime-encoded-words)
		  (goto-char (point-max))
		  (let ((vm-auto-displayed-mime-content-types
			 '("text" "multipart"))
			(vm-mime-internal-content-types
			 '("text" "multipart"))
			(vm-mime-external-content-types-alist nil))
		    (vm-decode-mime-layout (vm-mm-layout m)))
		  (let ((pop-up-windows (and pop-up-windows
					     (eq vm-mutable-windows t)))
			;; call-process-region calls write-region.
			;; don't let it do CR -> LF translation.
			(selective-display nil))
		    (if need-tempfile
			(write-region (point-min) (point-max)
				      tempfile nil 0))
		    (call-process-region (point-min) (point-max)
					 (or shell-file-name "sh")
					 nil buffer nil
					 shell-command-switch command)
		    (if need-tempfile
			(vm-error-free-call 'delete-file tempfile))))
	      (and work-buffer (kill-buffer work-buffer))))
	(save-restriction
	  (widen)
	  (narrow-to-region (vm-vheaders-of m) (vm-text-end-of m))
	  (let ((pop-up-windows (and pop-up-windows
				     (eq vm-mutable-windows t)))
		;; call-process-region calls write-region.
		;; don't let it do CR -> LF translation.
		(selective-display nil))
	    (if need-tempfile
		(write-region (point-min) (point-max)
			      tempfile nil 0))
	    (call-process-region (point-min) (point-max)
				 (or shell-file-name "sh")
				 nil buffer nil
				 shell-command-switch command)
	    (if need-tempfile
		(vm-error-free-call 'delete-file tempfile)))))
      (setq mlist (cdr mlist)))
    (vm-display nil nil '(vm-print-message) '(vm-print-message))
    (if (not (zerop (save-excursion (set-buffer buffer) (buffer-size))))
	(display-buffer buffer))))
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