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;;;;; -*-coding: iso-8859-1;-*-
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;;;;;
;;;;; $Id$
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;;;;; Copyright (C) 1991-2002  Lysator Academic Computer Association.
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;;;;;
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;;;;; This file is part of the LysKOM Emacs LISP client.
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;;;;; 
;;;;; LysKOM is free software; you can redistribute it and/or modify it
;;;;; under the terms of the GNU General Public License as published by 
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;;;;; the Free Software Foundation; either version 2, or (at your option) 
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;;;;; any later version.
;;;;; 
;;;;; LysKOM 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 LysKOM; see the file COPYING.  If not, write to
;;;;; Lysator, c/o ISY, Linkoping University, S-581 83 Linkoping, SWEDEN,
;;;;; or the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, 
;;;;; MA 02139, USA.
;;;;;
;;;;; Please mail bug reports to bug-lyskom@lysator.liu.se. 
;;;;;
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;;;; ================================================================
;;;; ================================================================
;;;;
;;;; File: edit-text.el
;;;;
;;;; This file contains functions which lets the LysKOM user edit
;;;; a text in a window. It also defines a new mode - lyskom-edit-mode.
;;;;

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(setq lyskom-clientversion-long 
      (concat lyskom-clientversion-long
	      "$Id$\n"))


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;;;; ================================================================

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;;; Set variables to make lyskom-edit-mode a minor mode. This
;;; simplifies some stuff a lot

(defvar lyskom-edit-mode nil
  "Mode variable for lyskom-edit-mode")
(make-variable-buffer-local 'lyskom-edit-mode)

(defvar lyskom-edit-sending-mode nil
  "Mode variable for lyskom-edit-sending-mode")
(make-variable-buffer-local 'lyskom-edit-sending-mode)

(defvar lyskom-edit-sent-mode nil
  "Mode variable for lyskom-edit-sent-mode")
(make-variable-buffer-local 'lyskom-edit-sent-mode)

(put 'lyskom-edit-mode 'permanent-local t)

(or (assq 'lyskom-edit-mode minor-mode-alist)
    (setq minor-mode-alist (cons '(lyskom-edit-mode " LysKOM Edit")
                                 minor-mode-alist)))

(or (assq 'lyskom-edit-sending-mode minor-mode-alist)
    (setq minor-mode-alist (cons '(lyskom-edit-sending-mode " LysKOM Sending")
                                 minor-mode-alist)))

(or (assq 'lyskom-edit-sent-mode minor-mode-alist)
    (setq minor-mode-alist (cons '(lyskom-edit-sent-mode " LysKOM Sent")
                                 minor-mode-alist)))

(or (assq 'lyskom-edit-mode minor-mode-map-alist)
    (setq minor-mode-map-alist
	  (cons (cons 'lyskom-edit-mode lyskom-edit-mode-map)
		minor-mode-map-alist)))

(or (assq 'lyskom-edit-sending-mode minor-mode-map-alist)
    (setq minor-mode-map-alist
	  (cons (cons 'lyskom-edit-sending-mode lyskom-edit-mode-map)
		minor-mode-map-alist)))

(or (assq 'lyskom-edit-sent-mode minor-mode-map-alist)
    (setq minor-mode-map-alist
	  (cons (cons 'lyskom-edit-sending-mode lyskom-edit-mode-map)
		minor-mode-map-alist)))


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(defvar lyskom-edit-mode-name "LysKOM edit"
  "Name of the mode.")

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(defvar lyskom-edit-text-sent nil
  "Non-nil when a text has been sent")

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(defvar lyskom-is-dedicated-edit-window nil
  "Status variable for an edit-window.")

(defvar lyskom-edit-handler nil
  "Status variable for an edit-buffer.
See lyskom-edit-handler-data.")

(defvar lyskom-edit-handler-data nil
  "Status variable for an edit-buffer.
See lyskom-edit-handler.")

(defvar lyskom-edit-return-to-configuration nil
  "Status variable for an edit-buffer.")

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;;; Error signaled by lyskom-edit-parse-headers
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(put 'lyskom-edit-text-abort 'error-conditions
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     '(error lyskom-error lyskom-edit-error lyskom-edit-text-abort))
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(put 'lyskom-unknown-header 'error-conditions
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     '(error lyskom-error lyskom-edit-error lyskom-unknown-header))
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(put 'lyskom-no-subject 'error-conditions
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     '(error lyskom-error lyskom-edit-error lyskom-no-subject))
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(put 'lyskom-edit-error 'error-conditions
     '(error lyskom-error lyskom-edit-error))

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(defun lyskom-edit-text (proc misc-list subject body
			      &optional handler &rest data)
  "Edit a text in a new buffer.
PROC is the associated process.
MISC-LIST is the default misc-list.
SUBJECT is subject (a string).
BODY is the default text-body (a string, normally empty.)
HANDLER is a function to call when the text has been created.
DATA is extra data to send to the function. HANDLER is called with
	(apply HANDLER text-no DATA)
where text-no is the number of the text.
Does lyskom-end-of-command."
  (setq lyskom-is-writing t)
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  (lyskom-dispatch-edit-text proc misc-list subject body
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                             handler data))
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(defun lyskom-dispatch-edit-text (proc misc-list subject body
				       &optional handler &rest data)
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  "Same as lyskom-edit-text except that it doesn't set lyskom-is-writing."
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  (let ((buffer (lyskom-get-buffer-create 'write-texts
                                          (concat 
                                           (buffer-name (process-buffer proc))
                                           "-edit")))
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	(config (current-window-configuration)))
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    (lyskom-display-buffer buffer)
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    (text-mode)
    (lyskom-ignore-errors
      (run-hooks 'lyskom-edit-mode-mode-hook))
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    (lyskom-edit-mode)
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    (make-local-variable 'lyskom-edit-handler)
    (make-local-variable 'lyskom-edit-handler-data)
    (make-local-variable 'lyskom-edit-return-to-configuration)
    (setq lyskom-edit-handler handler)
    (setq lyskom-edit-handler-data data)
    (setq lyskom-edit-return-to-configuration config)
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    (buffer-disable-undo)
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    (lyskom-edit-insert-miscs misc-list subject body)
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    (buffer-enable-undo)
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    (goto-char (point-min))
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    (re-search-forward (regexp-quote (lyskom-get-string
				      'header-subject))
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		       (point-max)
		       'end)
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    (if (not (looking-at "\\s-*$"))
        (goto-char (point-max)))
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    (lyskom-message "%s" (lyskom-get-string 'press-C-c-C-c)))
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  (set-buffer lyskom-buffer)
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  )
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(defun lyskom-edit-find-separator (&optional move-point)
  "Return the end position of the separator line.
If MOVE-POINT is non-nil, move point to the start of the separator."
  (prog1
      (save-excursion
        (goto-char (point-min))
        (and (re-search-forward
              (concat "^"
                      (regexp-quote
                       (substitute-command-keys
                        (lyskom-get-string 'header-separator)))
                      "$")
              nil t)))
    (when (and move-point (match-beginning 0))
      (goto-char (match-beginning 0)))))

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(defun lyskom-edit-insert-miscs (misc-list subject body &optional aux-list)
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  "Insert MISC-LIST into header of text.
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RECPT		-> Mottagare: <%d> %s.
CC-RECPT	-> Extra kopia: <%d> %s.
BCC-RECPT       -> Blind kopia: <%d> %s.
COMM-TO		-> Kommentar till text %d.
FOOTN-TO	-> Fotnot till text %d.
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nil             -> Ingenting."
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  (let ((edit-buffer (current-buffer))
	(where-put-misc (point-min-marker))
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	(main-buffer lyskom-buffer))
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    (set-buffer main-buffer)
    (setq misc-list (cdr misc-list))
    (while (not (null misc-list))
      (let ((key (car (car misc-list)))
	    (data (cdr (car misc-list))))
	(cond
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	 ((eq key 'RECPT)
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	  (lyskom-edit-insert-misc-conf (blocking-do 'get-conf-stat data)
					(lyskom-get-string 'recipient)
					where-put-misc data))
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	 ((eq key 'CC-RECPT)
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	  (lyskom-edit-insert-misc-conf (blocking-do 'get-conf-stat data)
					(lyskom-get-string 'carbon-copy)
					where-put-misc data))
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	 ((eq key 'BCC-RECPT)
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	  (lyskom-edit-insert-misc-conf (blocking-do 'get-conf-stat data)
					(lyskom-get-string 'blank-carbon-copy)
					where-put-misc data))
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	 ((eq key 'COMM-TO)
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	  (lyskom-edit-get-commented-author (blocking-do 'get-text-stat data)
					    (lyskom-get-string 'comment)
					    where-put-misc data))
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	 ((eq key 'FOOTN-TO)
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	  (lyskom-edit-get-commented-author (blocking-do 'get-text-stat data)
					    (lyskom-get-string 'footnote)
					    where-put-misc data)))
	(setq misc-list (cdr misc-list))))
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    (mapcar (function
             (lambda (item)
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               (let ((data (lyskom-aux-item-call
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                            item '(edit-insert print)
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                            item lyskom-pers-no)))
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                 (when data
                   (lyskom-princ
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                    (lyskom-format "%#1@%[%#3s%] %#2s\n" 
                            (lyskom-default-button 'aux-edit-menu 
                                                   (cons edit-buffer
                                                         (copy-marker where-put-misc)))
                            data
                            (lyskom-get-string 'aux-item-prefix))
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                    where-put-misc)))))
            aux-list)
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    (unless kom-edit-hide-add-button
      (lyskom-princ (lyskom-format "%[%#1@%#2s%]\n"
                                   (lyskom-default-button 'add-recipient-or-xref
                                                          edit-buffer)
                                   (lyskom-get-string 'add-recpt-button-text))
                    where-put-misc))
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    (lyskom-princ (lyskom-format 'text-mass subject 
				 (substitute-command-keys
				  (lyskom-get-string 'header-separator))
				 body 
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				 (lyskom-get-string 'header-subject)
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                                 '(read-only t)
                                 '(read-only t front-sticky nil start-open t rear-nonsticky nil end-open nil)
                                 '(read-only t rear-nonsticky t end-open t front-sticky t start-open nil)
                                 )
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		  where-put-misc)
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    (set-buffer edit-buffer)
    (goto-char where-put-misc)
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    (set-marker where-put-misc nil)))
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(defun lyskom-edit-insert-misc-conf (conf-stat string stream number)
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  "Insert Recipient:, Carbon copy: or Blind Carbon copy: in
edit-buffer.
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CONF-STAT is the conf-stat of the conference that is about to be put in,
STRING is the string that is inserted.
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STREAM is the buffer or a marker telling the position.
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NUMBER is the number of the person. Used if the conf-stat is nil."
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  (lyskom-princ
   (lyskom-format "%[%#1@%#2s%]: <%#3m> %#4M\n" 
                  (lyskom-default-button
                   'recpt-type
                   (list (or (conf-stat->conf-no conf-stat) number)
                         (marker-buffer stream))
                   (list (lyskom-get-string 'recpt-type-popup-title)
                         string))
                  string
                  (or conf-stat number)
                  (or conf-stat ""))
   stream))
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(defun lyskom-edit-get-commented-author (text-stat string stream number)
  (if text-stat
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      (let ((mx-from (car (lyskom-get-aux-item (text-stat->aux-items text-stat) 17)))
            (mx-author (car (lyskom-get-aux-item (text-stat->aux-items text-stat) 16))))
        
       

        (lyskom-edit-insert-commented-author 
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         (if (or mx-from mx-author)
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             (lyskom-format-mx-author mx-from mx-author)
           (blocking-do 'get-conf-stat (text-stat->author text-stat)))
         string stream number))
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    (lyskom-edit-insert-commented-author nil string stream number)))


(defun lyskom-edit-insert-commented-author (conf-stat string stream number)
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  (lyskom-princ (lyskom-format 'comment-to-by
                               string
                               number
                               (if conf-stat
                                   (lyskom-format 'by conf-stat)
                                 ""))
                stream))

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(defun lyskom-create-misc-list (&rest misc-pairs)
  "Create a misc-list.
Note that a misc-list is very different from a misc-info-list.
A misc-list is used when creating a new text, and sent to the server.
A misc-info-list is what is received from the server. Although the server
has the same format for the two things, this client uses two quite
different formats.

The arguments to this function is any number of pairs of data. The first
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item in each pair should be one of RECPT, CC-RECPT, COMM-TO or FOOTN-TO.
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The second item should be the corresponding conf- or text-no.

The result is a list of dotted pairs:
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	('RECPT . conf-no)
	('CC-RECPT . conf-no)
	('BCC-RECPT . conf-no)
	('COMM-TO . text-no)
	('FOOTN-TO . text-no).
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First element is a type-tag."
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   (let ((result (cons 'MISC-LIST nil)))
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    (while (not (null misc-pairs))
      (nconc result (cons (cons (car misc-pairs)
				(car (cdr misc-pairs)))
			  nil))
      (setq misc-pairs (cdr (cdr misc-pairs))))
    result))


;;; ================================================================
;;;                   lyskom-edit-mode

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(defvar lyskom-edit-mode-hook nil
  "*List of functions to be called when entering lyskom-edit-mode.
Watch out! None of these functions are allowed to do kill-all-local-variables
because kom-edit-send and other functions depend on some variables to be able
to enter the text in the correct lyskom-process.")

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(defvar lyskom-edit-mode-mode-hook nil
  "*List of functions to be called when entering lyskom-edit-mode.
Watch out! None of these functions are allowed to do kill-all-local-variables
because kom-edit-send and other functions depend on some variables to be able
to enter the text in the correct lyskom-process.

This one differs from lyskom-edit-mode-hook in that it is called before
the lyskom-special key bindings are added.")


(defun lyskom-edit-mode (&optional arg)
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  "\\<lyskom-edit-mode-map>Mode for editing texts for LysKOM.
Commands:
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\\[kom-edit-send]   sends the text when you are ready. The buffer will be
	  deleted if (and only if) the server accepts the text.
\\[kom-edit-quit]   aborts the editing. You will get back to the LysKOM buffer.

\\[kom-edit-show-commented]   shows the commented text in a temporary buffer.

\\[kom-edit-add-recipient]   asks for another recipient and adds him to the header.
\\[kom-edit-add-copy]   as \\[kom-edit-add-recipient] but adds him as copy-recipient.
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\\[kom-edit-add-cross-reference]   asks for what to refer to and adds a cross reference to it.
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\\[kom-edit-insert-commented]   inserts the commented or footnoted text.
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\\[kom-edit-insert-text]   inserts the shown text, you tell the number.
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\\[kom-edit-insert-link]   asks for what to link to and inserts a link to it.
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Even though this is a minor mode, it's not intended to be turned on and off,
so it's not as clean as it ought to be."
  (interactive "P")
  (setq lyskom-edit-mode
        (if (null arg)
            (not lyskom-edit-mode)
          (> (prefix-numeric-value arg) 0)))

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  (lyskom-set-menus 'lyskom-edit-mode lyskom-edit-mode-map)

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  (when lyskom-edit-mode
    (lyskom-edit-sending-mode 0)
    (lyskom-edit-sent-mode 0)
    (auto-fill-mode 1)
    (auto-save-mode 1)
    (when (not (local-variable-p 'lyskom-edit-text-sent (current-buffer)))
      (make-local-variable 'lyskom-edit-text-sent)
      (setq lyskom-edit-text-sent nil))
    (make-local-variable 'paragraph-start)
    (make-local-variable 'paragraph-separate)
    (setq paragraph-start (concat "^" 
                                  (regexp-quote 
                                   (substitute-command-keys
                                    (lyskom-get-string 'header-separator)))
                                  "$\\|" paragraph-start))
    (setq paragraph-separate (concat "^" 
                                     (regexp-quote 
                                      (substitute-command-keys
                                       (lyskom-get-string 'header-separator)))
                                     "$\\|" paragraph-separate))
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    (make-local-variable 'comment-start)
    (make-local-variable 'comment-end)
    (setq comment-start kom-cite-string
	  comment-end "")
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    (run-hooks 'lyskom-edit-mode-hook)))

(defun lyskom-edit-sending-mode (arg)
  (interactive "P")
  (setq lyskom-edit-sending-mode 
        (if (null arg)
            (not lyskom-edit-sending-mode)
          (> (prefix-numeric-value arg) 0)))

  (when lyskom-edit-sending-mode
    (lyskom-edit-mode 0)
    (lyskom-edit-sent-mode 0)))

(defun lyskom-edit-sent-mode (arg)
  (interactive "P")
  (setq lyskom-edit-sent-mode 
        (if (null arg)
            (not lyskom-edit-sent-mode)
          (> (prefix-numeric-value arg) 0)))

  (when lyskom-edit-sent-mode
    (lyskom-edit-sending-mode 0)
    (lyskom-edit-mode 0)))
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;;; ================================================================
;;;   Functions bound to keyboard seqences in lyskom-edit-mode
;;;

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(defvar lyskom-edit-aux-list)
(defvar lyskom-edit-misc-list)
(defvar lyskom-edit-subject)
(defvar lyskom-edit-text)

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(defun kom-edit-send-anonymous ()
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  "Send the text anonymously to the server. Be aware that although the text 
will be truly anonymous, it is easy to slip up in such a way that the author
is evident anyway."
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  (interactive)
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  (lyskom-edit-send 'initiate-create-anonymous-text t))
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(defun kom-edit-send ()
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  "Send the text to the server. This command will attempt to send the text
to the server. If something goes wrong, a prompt will be shown allowing you
to edit the message and try to send it again."
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  (interactive)
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   (if (and (lyskom-default-value 'lyskom-is-anonymous)
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            (lyskom-j-or-n-p 'do-send-anonymous))
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       (lyskom-edit-send 'initiate-create-anonymous-text t)
     (lyskom-edit-send 'initiate-create-text nil)))
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(defun lyskom-edit-send (send-function &optional is-anonymous)
  "Send the text to the server by calling SEND-FUNCTION.
If optional IS-ANONYMOUS is non-nil, assume that the text is being submitted
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anonymously and take actions to avoid revealing the sender.

This runs `kom-send-text-hook' and (for backwards compatibility)
`lyskom-send-text-hook'."
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  (condition-case err
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      (if (or (not lyskom-edit-text-sent)
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	      (j-or-n-p (lyskom-get-string 'already-sent)))
	  (progn 
	    (let ((buffer (current-buffer))
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		  (headers nil)
                  (misc-list nil)
                  (subject nil)
                  (message nil)
                  (aux-list nil))
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              ;;
              ;; Run user hooks
              ;; ####: ++++: FIXME: We should quit more graciously.

              (if (and (not (run-hook-with-args-until-failure 'kom-send-text-hook))
                       (not (run-hook-with-args-until-failure 'lyskom-send-text-hook)))
                  (signal 'lyskom-edit-text-abort nil))


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	      (save-excursion
		(setq headers (lyskom-edit-parse-headers)
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		      misc-list (apply 'lyskom-create-misc-list 
                                       (elt headers 1))
                      aux-list (elt headers 2)
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		      subject (car headers)))
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              ;;
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              ;; Check that there is a subject
              ;;

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	      (if (or (null subject)
                      (string= subject ""))
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		  (let ((old (point)))
		    (goto-char (point-min))
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		    (re-search-forward (lyskom-get-string 'header-subject)
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				       nil t)
		    (end-of-line)
		    (if (/= (point) old)
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			(signal 'lyskom-no-subject '(enter-subject-idi)))))
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              ;;
              ;; Check the recipients
              ;;

              (let ((extra-headers
                     (lyskom-edit-send-check-recipients misc-list
                                                        subject)))
                (if extra-headers
                    (setq misc-list (apply 'lyskom-create-misc-list
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                                           (nconc (elt headers 1)
						  extra-headers)))))
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              ;;
              ;; Check that we don't add ourselves to an anon text
              ;;

              (when (and is-anonymous
                         (rassq lyskom-pers-no (cdr misc-list))
                         (lyskom-j-or-n-p 
                          (lyskom-get-string 'remove-self-sending-anonymous)))
                (rplacd misc-list (delq (rassq lyskom-pers-no (cdr misc-list))
                                        (cdr misc-list))))

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              ;;
              ;; Transform the message text
              ;;

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              (let ((lyskom-edit-aux-list aux-list)
                    (lyskom-edit-misc-list misc-list)
                    (lyskom-edit-subject subject)
                    (lyskom-edit-text (lyskom-edit-extract-text)))
                (run-hook-with-args-until-success
                 'lyskom-send-text-transform-hook)
                (setq aux-list lyskom-edit-aux-list)
                (setq misc-list lyskom-edit-misc-list)
                (setq subject lyskom-edit-subject)
                (setq message lyskom-edit-text))
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	      (save-excursion
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                (let* ((full-message
                        (cond ((and lyskom-allow-missing-subject
                                    (or (null subject)
                                        (string= subject ""))
                                    (not (string-match ".*\n" message)))
                               message)
                              (t (concat (or subject "") "\n" message))))
                       (content-type (lyskom-get-aux-item aux-list 1))
                       (charset (and content-type
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                                     (lyskom-mime-content-type-get
                                      (lyskom-mime-decode-content-type
                                           (aux-item->data (car content-type)))
                                      'charset)))
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                       (mime-charset (lyskom-mime-string-charset full-message)))

                  ;; If the charset isn't already set, encode the string

                  (if (and mime-charset (null charset))
                      (setq full-message
                            (lyskom-mime-encode-string full-message))
                    (when (lyskom-j-or-n-p 'too-many-languages)
                      (keyboard-quit)))

                  ;; Add the charset data to the content type

                  (cond ((> (length content-type) 1)
                         (lyskom-error (lyskom-get-string 'too-many-content-types)))
                        ((null content-type)
                         (setq aux-list
                               (cons (lyskom-create-aux-item 0 1 nil nil
                                                             (lyskom-create-aux-item-flags nil nil nil nil nil nil nil nil)
                                                             0
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                                                             (format "text/x-kom-basic;charset=%S" mime-charset))
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                                     aux-list)))
                        ((null charset)
                         (set-aux-item->data (car content-type)
                                             (format "%s;charset=%S"
                                                     (aux-item->data (car content-type))
                                                     mime-charset))))

                  ;; Send the text

                  (lyskom-edit-sending-mode 1)
                  (set-buffer lyskom-buffer)
                  ;; Don't change the prompt if we won't see our own text
                  (if (and kom-created-texts-are-read
                           (not is-anonymous))
                      (setq lyskom-dont-change-prompt t))
                  (setq lyskom-is-writing nil)
                  (lyskom-tell-internat 'kom-tell-send)
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                  (run-hook-with-args 'lyskom-create-text-hook
                              full-message
                              misc-list
                              (if (not is-anonymous)
                                  (cons (lyskom-create-aux-item
                                         0 15 0 0
                                         (lyskom-create-aux-item-flags
                                          nil nil nil nil nil nil nil nil)
                                         0 (concat "lyskom.el "
                                                   lyskom-clientversion))
                                        aux-list)
                                aux-list)
                              buffer
                              is-anonymous)
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                  (run-hook-with-args 'kom-create-text-hook
                              full-message
                              misc-list
                              (if (not is-anonymous)
                                  (cons (lyskom-create-aux-item
                                         0 15 0 0
                                         (lyskom-create-aux-item-flags
                                          nil nil nil nil nil nil nil nil)
                                         0 (concat "lyskom.el "
                                                   lyskom-clientversion))
                                        aux-list)
                                aux-list)
                              buffer
                              is-anonymous)
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                  (funcall send-function
                           'sending
                           'lyskom-create-text-handler
                           full-message
                           misc-list
                           (if (not is-anonymous)
                               (cons (lyskom-create-aux-item
                                      0 15 0 0
                                      (lyskom-create-aux-item-flags
                                       nil nil nil nil nil nil nil nil)
                                      0 (concat "lyskom.el "
                                                lyskom-clientversion))
                                     aux-list)
                             aux-list)
                           buffer
                           is-anonymous))))
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            (lyskom-undisplay-buffer)
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	    (goto-char (point-max))))
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    ;;
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    ;; Catch no-subject and other things
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    ;;

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    (lyskom-edit-text-abort
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     (and (cdr err) (apply 'lyskom-message (cdr err))))
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    (lyskom-no-subject
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     (lyskom-beep kom-ding-on-no-subject)
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     (if (cdr-safe (cdr-safe err))
	 (goto-char (car-safe (cdr-safe (cdr-safe err)))))
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     (lyskom-message "%s" (lyskom-get-string (car (cdr err))))
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     (condition-case nil
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         (let ((text ""))
           (save-excursion
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             (set-buffer lyskom-buffer)
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             (if (and (string= "kom.lysator.liu.se" lyskom-server-name)
                      (eq lyskom-pers-no 698))
                 (setq text "rende, IDI!")))
           (save-excursion (insert text)))
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       (error nil)))
    (lyskom-unknown-header
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     (lyskom-message "%s" (lyskom-get-string (car (cdr err)))))))
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(eval-when-compile (defvar ispell-dictionary nil))
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(eval-when-compile (defvar ispell-message-text-end nil))
(eval-when-compile (defvar ispell-message-start-skip nil))
(eval-when-compile (defvar ispell-message-end-skip nil))
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;;USER-HOOK: lyskom-ispell-text
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(defun lyskom-ispell-text ()
  "Check spelling of the text body.
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Put this in kom-send-text-hook"
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  (kom-edit-ispell-message)
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  t)


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(eval-when-compile
  (defvar ispell-dictionary nil)
  (defvar ispell-message-text-end nil)
  (defvar ispell-message-start-skip nil)
  (defvar ispell-message-end-skip nil))

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(defalias 'kom-ispell-message 'kom-edit-ispell-message)
(defun kom-edit-ispell-message ()
  "Check spelling of the text. Spelling is checked using ispell
and the dictionary indicated by `kom-ispell-dictionary'. If you
want to check the spelling of every message before sending it,
read the documentation for `lyskom-ispell-text' and 
`kom-send-text-hook'"
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  (interactive)
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  (require 'ispell)
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  (let ((ispell-dictionary (or kom-ispell-dictionary ispell-dictionary))
        (kill-ispell (or (not (boundp 'ispell-dictionary))
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                         (not (lyskom-string= kom-ispell-dictionary
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                                       ispell-dictionary))))
        (result nil))
    (when kill-ispell (ispell-kill-ispell t))

    ;; Checking code

    (save-excursion
      (goto-char (point-min))
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      (let* ((internal-messagep (lyskom-edit-find-separator t))
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             (limit 
              (copy-marker
               (cond ((not ispell-message-text-end) (point-max))
                     ((char-or-string-p ispell-message-text-end)
                      (if (re-search-forward ispell-message-text-end nil t)
                          (match-beginning 0)
                        (point-max)))
                     (t (min (point-max) (funcall ispell-message-text-end))))))
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             (cite-regexp 
              (regexp-quote
               (lyskom-default-value 'kom-cite-string)))
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             (cite-regexp-start (concat "^[ \t]*$\\|" cite-regexp))
             (cite-regexp-end (concat "^\\(" cite-regexp "\\)"))
             (old-case-fold-search case-fold-search)
             (case-fold-search t)
             (ispell-checking-message t)
             (subject-string 
              (concat "^" (regexp-quote (lyskom-get-string 'subject)))))
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        (lyskom-ignore ispell-checking-message)
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        (goto-char (point-min))
        (while (if internal-messagep
                   (< (point) internal-messagep)
                 (not (eobp)))
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          (if (lyskom-looking-at subject-string)
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              (progn (goto-char (match-end 0))
                     (let ((case-fold-search old-case-fold-search))
                       (ispell-region (point)
                                      (progn
                                        (end-of-line)
                                        (point)))))
            (forward-line 1)))

        (while (< (point) limit)
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          (while (and (lyskom-looking-at cite-regexp-start)
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                      (< (point) limit)
                      (zerop (forward-line 1))))

          (if (< (point) limit)
              (let* ((start (point))
                     (end-c (and (re-search-forward cite-regexp-end limit 'end)
                                 (match-beginning 0)))
                     (end-fwd (and (goto-char start)
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                                   (boundp 'ispell-message-start-skip)
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                                   (stringp ispell-message-start-skip)
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                                   (re-search-forward ispell-message-start-skip
                                                      limit 'end)))
                     (end (or (and end-c end-fwd (min end-c end-fwd))
                              end-c 
                              end-fwd
                              (marker-position limit))))
                (goto-char start)
                (setq result (ispell-region start end))
                  (if (and end-fwd (= end end-fwd))
                      (progn (goto-char end)
                             (re-search-forward ispell-message-end-skip 
                                                limit 'end))
                    (goto-char end)))))
          (set-marker limit nil)
          result))

    (when kill-ispell (ispell-kill-ispell t))
    result))

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(defun lyskom-is-permitted-author (conf-stat)
  (and conf-stat
       (or (eq 0 (conf-stat->permitted-submitters conf-stat))
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           (lyskom-is-supervisor (conf-stat->conf-no conf-stat)
                                 lyskom-pers-no))))
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(defun lyskom-edit-send-check-recipients (misc-list subject) 
  "Check that the recipients of this text are OK. Ask the user to
confirm multiple recipients; check that the author of the commented
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text is a member of some recipient of this text.

Cannot be called from a callback."
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  (let* ((comm-to-list nil)
         (recipient-list nil)
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         (text-stat nil)
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         (collector (make-collector))
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         (extra-headers nil)
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         (buffer (current-buffer))
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         (me (save-excursion (set-buffer lyskom-buffer)
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                             lyskom-pers-no))
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         (num-me 0)
         (num-real-recpt 0))
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    (lyskom-ignore text-stat)       ; Have no idea if its ever used...
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    ;;
    ;; List all texts this text is a comment to
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    ;; List all recipients of the text
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    ;;

    (lyskom-traverse misc (cdr misc-list)
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      (cond ((eq (car misc) 'COMM-TO)
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             (setq comm-to-list (cons (cdr misc)
                                      comm-to-list)))
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            ((memq (car misc) lyskom-recpt-types-list)
             (when (eq (car misc) 'RECPT)
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               (setq num-real-recpt (1+ num-real-recpt))
               (when (eq (cdr misc) me) (setq num-me (1+ num-me))))
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             (setq recipient-list (cons (cdr misc) recipient-list)))))

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    ;;
    ;; Check that there are recipients
    ;;

    (when (null recipient-list)
      (lyskom-error "%s" (lyskom-format 'no-recipients)))

    ;;
    ;; Check for duplicate recipients
    ;;

    (let ((tmp recipient-list))
      (while tmp
        (when (memq (car tmp) (cdr tmp))
          (lyskom-error "%s" (lyskom-format 'duplicate-recipients (car tmp))))
        (setq tmp (cdr tmp))))

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    ;;
    ;; Check for new comments
    ;;

    (when (save-excursion (set-buffer lyskom-buffer)
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                          (cond ((null kom-check-for-new-comments) nil)
                                ((functionp kom-check-for-new-comments)
                                 (funcall kom-check-for-new-comments
                                          buffer misc-list subject))
                                (t t)))
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      (lyskom-message "%s" (lyskom-format 'checking-comments))
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      (save-excursion
        (set-buffer lyskom-buffer)
        (set-collector->value collector nil)
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        (mapcar (function (lambda (text-stat)
                            (cache-del-text-stat text-stat)
                            (initiate-get-text-stat 'sending 
                                                    'collector-push
                                                    text-stat
                                                    collector)))
                comm-to-list)
        (lyskom-wait-queue 'sending)
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	(lyskom-traverse
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            text-stat (collector->value collector)
          (when text-stat
            (when (catch 'unread
                    (lyskom-traverse
                        misc-item (text-stat->misc-info-list text-stat)
                      (when (and (eq (misc-info->type misc-item) 'COMM-IN)
                                 (not (lyskom-text-read-at-least-once-p 
                                       (blocking-do
                                        'get-text-stat
                                        (misc-info->comm-in misc-item)))))
                        (throw 'unread t))))
              (unless (lyskom-j-or-n-p
                       (lyskom-format 'have-unread-comment text-stat))
                (signal 'lyskom-edit-text-abort
                        (list "%s"
                              (lyskom-get-string 
                               'please-check-commented-texts))))))))
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      (lyskom-message "%s" (lyskom-format 'checking-comments-done)))
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    ;;
    ;; Confirm multiple recipients
    ;;
    
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    (if (and (lyskom-default-value 'kom-confirm-multiple-recipients)
             (not (eq (lyskom-default-value 'kom-confirm-multiple-recipients)
                      'before))
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             (> (- num-real-recpt num-me) 1))

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        (save-excursion
          (goto-char (point-min))
          (if (not 
               (lyskom-j-or-n-p
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                (lyskom-format 'comment-all-relevant-p)))
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              (signal 'lyskom-edit-text-abort 
                      (list "%s" 
                            (lyskom-get-string 
                             'please-edit-recipients))))))
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    ;;
    ;; Check that the authors of all commented texts get to see the new text
    ;;

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    (when (and (lyskom-default-value 'kom-check-commented-author-membership)
               (assq 'COMM-TO (cdr misc-list)))
      (lyskom-message "%s" (lyskom-get-string 'checking-rcpt))

      (let ((raw-author-list (make-collector))
            (author-list nil)
            (authors-to-ask-about nil)
            (recipient-list (let ((result nil))
                              (lyskom-traverse misc (cdr misc-list)
                                (when (memq (car misc) 
                                            lyskom-recpt-types-list)
                                  (setq result (cons (cdr misc) result))))
                              (nreverse result))))
        ;;
        ;; Collect conf-stats of all authors to check. Since there
        ;; could be several, do it in a non-blocking way.
        ;;

        (lyskom-traverse text-no comm-to-list
          (initiate-get-text-stat 
           'sending
           (lambda (text-stat collector)
             (when text-stat
               (initiate-get-conf-stat 'sending
                                       'collector-push
                                       (text-stat->author text-stat)
                                       collector)))
           text-no
           raw-author-list))
        (lyskom-wait-queue 'sending)
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        (setq raw-author-list (lyskom-delete-duplicates
                               (collector->value raw-author-list)
                               'conf-stat->conf-no))
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        ;;
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        ;; Filter the list. Remove all authors that are direct recipients
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        ;; or whose send-comments-to is a direct recipient or who are
        ;; listed in kom-dont-check-commented-authors
        ;;

        (lyskom-traverse author raw-author-list
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          (let ((send-comments-to (lyskom-get-send-comments-to author t)))
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            (cond

             ;; Author is in kom-dont-check-commented-authors

             ((memq (conf-stat->conf-no author) 
                    kom-dont-check-commented-authors))

             ;; Author is direct recipient to text

             ((memq (conf-stat->conf-no author) recipient-list))

             ;; Author has a zero send-comments-to

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             ((and send-comments-to (zerop (car send-comments-to))))
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             ;; We don't have permission to send stuff to the author's
             ;; send-comments-to or to the author if there is no
             ;; send-comments-to

             ((or (and send-comments-to
                       (not (lyskom-is-permitted-author
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                             (blocking-do 'get-conf-stat (car send-comments-to)))))
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                  (and (not send-comments-to)
                       (not (lyskom-is-permitted-author author)))))

             ;; We can't filter the author straight off, so we add it
             ;; to the list that we want to check completely.

             (t (setq author-list (cons author author-list))))))

        ;;
        ;; Now author-list contains a list of authors that we need to
        ;; check memberships of. Traverse all authors and get their
        ;; memberships in all recipients.

        (lyskom-traverse author author-list
          (let ((memberships (make-collector)))
            (lyskom-traverse recipient recipient-list
              (initiate-query-read-texts 'sending
                                         (lambda (x y)
                                           (collector-push x y))
                                         (conf-stat->conf-no author)
                                         recipient
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                                         nil
                                         0
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                                         memberships))
            (lyskom-wait-queue 'sending)
            (setq memberships (collector->value memberships))

            ;;
            ;; Now memberships contains the memberships of author
            ;; in all recipients of the text. Traverse all memberships
            ;; in the collector and see if there is one that is not
            ;; an active membership. If there is not, then we need to
            ;; ask the user whether they want to add the author.
            ;;

            (unless (lyskom-traverse membership memberships
                      (when (and membership
                                 (not (membership-type->passive
                                       (membership->type membership))))
                        (lyskom-traverse-break t)))
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              (setq authors-to-ask-about (cons author authors-to-ask-about)))))
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        ;;
        ;; Now authors-to-ask-about contains all authors that we
        ;; want to ask about. So do that.
        ;;

        (lyskom-traverse author authors-to-ask-about
          (let ((send-comments-to
                 (car (lyskom-get-aux-item (conf-stat->aux-items author) 33))))
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            (when send-comments-to
              (cond ((string-match "^\\([0-9]+\\)\\s-+\\([0-9]+\\)" (aux-item->data send-comments-to))
                     (setq send-comments-to 
                           (cons (string-to-number
                                  (match-string 1 (aux-item->data send-comments-to)))
                                 (string-to-number
                                  (match-string 2 (aux-item->data send-comments-to))))))
                    ((string-match "^\\([0-9]+\\)"
                                   (aux-item->data send-comments-to))
                     (setq send-comments-to
                           (cons (string-to-number
                                  (match-string 1 (aux-item->data send-comments-to)))
                                 0)))
                    (t (setq send-comments-to nil))))
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            (when (lyskom-j-or-n-p 
                   (lyskom-format 'add-recipient-p 
                                  author
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                                  (car send-comments-to)))
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              (setq extra-headers
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                    (nconc
                     (list
                      (cond ((and send-comments-to
                                  (eq (cdr send-comments-to) 0)) 'RECPT)
                            ((and send-comments-to
                                  (eq (cdr send-comments-to) 1)) 'CC-RECPT)
                            ((and send-comments-to
                                  (eq (cdr send-comments-to) 15)) 'BCC-RECPT)
                            (t (if (lyskom-j-or-n-p
                                    (lyskom-format 'really-add-as-recpt-q author))
                                   'RECPT
                                 'CC-RECPT)))
                            (conf-stat->conf-no author))
                     extra-headers)))))))
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    extra-headers))
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;;UNUSED: lyskom-send-enriched
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(defun lyskom-send-enriched ()
  (let ((content-type (lyskom-get-aux-item lyskom-edit-aux-list 1)))
    (when (or (null content-type)
              (and (= (length content-type) 1)
                   (string-match "^text/enriched" (aux-item->data (car content-type)))))
      (condition-case err
          (let ((buf (lyskom-get-buffer-create 'lyskom-enriched 
                                               "lyskom-enriched" 
                                               t)))
            (unwind-protect
                (save-excursion
                  (set-buffer buf)
                  (insert lyskom-edit-text)
                  (goto-char (point-min))
                  (format-encode-buffer 'text/enriched)
                  (goto-char (point-min))
                  (search-forward "\n\n")
                  (when (and (not (lyskom-string= 
                                   (replace-in-string (buffer-substring (point) (point-max))
                                                      "<<" "<" t)
                                   lyskom-edit-text))
                             (save-excursion
                               (set-buffer lyskom-buffer)
                               (lyskom-j-or-n-p 
                                (lyskom-get-string 'send-formatted))))
                    (setq lyskom-edit-text (buffer-substring (point) (point-max)))
                    (unless content-type
                      (setq lyskom-edit-aux-list 
                            (cons (lyskom-create-aux-item 0 1 nil nil
                                                          (lyskom-create-aux-item-flags nil nil nil nil nil nil nil nil)
                                                          0
                                                          "text/enriched")
                                  lyskom-edit-aux-list)))
                    (setq lyskom-edit-aux-list
                          (cons (lyskom-create-aux-item 0 10002 nil nil
                                                        (lyskom-create-aux-item-flags nil nil nil nil nil nil nil nil)
                                                        0
                                                        (buffer-substring (point-min) (point)))
                                lyskom-edit-aux-list)))
                  'stop-transforming-texts)
              (kill-buffer buf)))
        (error (if (lyskom-j-or-n-p
                    (lyskom-format (lyskom-get-string 'transform-error)
                                   (error-message-string err)))
                   nil
                 (signal 'lyskom-edit-text-abort nil)))))))
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(defun kom-edit-quit ()
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  "Cancel editing the text being written and return to reading LysKOM."
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  (interactive)
  (let ((edit-buffer (current-buffer)))
    (goto-char (point-max))
    (setq lyskom-is-writing nil)
    (lyskom-tell-internat 'kom-tell-regret)
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    (lyskom-save-excursion (set-buffer edit-buffer)
                           (delete-auto-save-file-if-necessary))
    (lyskom-undisplay-buffer edit-buffer)
    (kill-buffer edit-buffer))
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  (garbage-collect))			;Take care of the garbage.


(defun kom-edit-show-commented ()
  "Show the commented text in another window."
  (interactive)
  (lyskom-edit-get-commented 'lyskom-edit-show-commented))


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(defun kom-edit-insert-commented (arg)
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  "Insert the commented text, prepending each line with the
text in `kom-cite-string' (defaults to \"> \"). Note that citing
the commented text is not common practise in LysKOM (unlike
e-mail and news) since there is a strong link to the commented
text anyway. Use this command sparingly."
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  (interactive "P")
  (lyskom-edit-get-commented
   'lyskom-edit-insert-commented
   (list (cond ((and arg (listp arg)) "")
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	       (t nil)))))
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(defun kom-edit-insert-buglist ()
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  "Insert the commented buglist, Roxen Internet Software style. Excluded from manual."
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  (interactive)
  (lyskom-edit-get-commented 'lyskom-edit-insert-buglist))


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(defun kom-edit-insert-digit-text ()
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  "Prompt for a text to insert. Excluded from manual."
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  (interactive)
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  (setq unread-command-events (cons last-command-event unread-command-events))
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  (call-interactively 'kom-edit-insert-text nil))


(defun kom-edit-insert-text (no)
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  "Prompt for a text to insert, prefixing each line with the contents
of `kom-cite-string' (defaults to \"> \"). Note that citing texts is not
commonplace in LysKOM (unlike e-mail and news) since it is easy to
refer to specific texts (see `kom-edit-insert-link' and
`kom-edit-add-cross-reference'). Use this command sparingly."
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  (interactive (list
		(cond
		 ((null current-prefix-arg)
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                  (lyskom-read-number 'which-text-include))
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		 ((prefix-numeric-value current-prefix-arg)))))
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  (let ((buffer (current-buffer))
        (window (selected-window)))
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    (set-buffer lyskom-buffer)
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    (lyskom-collect 'edit)
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    (initiate-get-text 'edit nil no)
    (initiate-get-text-stat 'edit nil no)
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    (lyskom-use 'edit 'lyskom-edit-insert-commented buffer window)
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    (set-buffer buffer)
    (sit-for 0)))

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(defun lyskom-edit-get-commented (thendo &optional arg-list)
  "Get the commented text and text stat and then do THENDO with it.
This function is called with an argument list TEXT TEXT-STAT BUFFER
WINDOW plus any optional arguments given in ARG-LIST."
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  (let ((p (point)))
    (save-excursion
      (let* ((buffer (current-buffer))
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             (window (selected-window))
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             (headers (condition-case nil
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                          (elt (lyskom-edit-parse-headers) 1)
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                        (lyskom-edit-error nil))) ; Ignore these errors
             (no nil))
        (while headers
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          (if (memq (car headers) '(COMM-TO FOOTN-TO))
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              (setq no (car (cdr headers))
                    headers nil)
            (setq headers (cdr (cdr headers)))))
        (cond
         (no
          (goto-char p)
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          (set-buffer lyskom-buffer)
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          (blocking-do-multiple ((text (get-text no))
                                 (text-stat (get-text-stat no)))
            (set-buffer buffer)
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            (apply thendo text text-stat buffer window arg-list)))
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         (t
          (lyskom-message "%s" (lyskom-get-string 'no-such-text-m))))))
    (sit-for 0)))
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;;; ============================================================
;;; Info node stuff

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(defvar Info-current-node)
(defvar Info-current-file)

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;; NOTUSED: kom-yank-info-nodename
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(defalias 'kom-yank-info-nodename 'kom-edit-yank-info-nodename)
(defun kom-edit-yank-info-nodename ()
  "When browsing info files, this command will place a reference to the
current info node in the kill ring, from where it can be pasted into
another buffer. This command is useful when you want to refer to an 
info node in a LysKOM text."
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  (interactive)
  (kill-new (format "*Note %s: (%s)%s,"
		    Info-current-node
		    (file-name-nondirectory Info-current-file)
		    Info-current-node)))

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;; NOTUSED: kom-insert-last-info-nodename
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(defalias 'kom-insert-last-info-nodename 'kom-edit-insert-last-info-nodename)
(defun kom-edit-insert-last-info-nodename ()
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  "Insert a reference to the most recently visited info node."
  (interactive)
  (condition-case nil
      (let ((link nil))
        (save-excursion
          (set-buffer (get-buffer "*info*"))
          (setq link (format "*Note %s: (%s)%s,"
                             Info-current-node
                             (file-name-nondirectory Info-current-file)
                             Info-current-node)))
        (insert link))
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    (error (lyskom-message "%s" (lyskom-get-string 'cant-find-info-node)))))
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;;; ================================================================
;;;	  Add recipient, copy-recipient - Addera mottagare 
;;;
;;;  Author: Anders Gertz
;;;  Changed by: Linus Tolke

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(defun kom-edit-add-comment ()
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  "Makes this text a comment to another text. Using this command it is
possible to make the text a comment to multiple texts. To remove a 
comment link, simply remove the corresponding line from the headers
in the edit buffer."
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  (interactive)
  (let* ((edit-buffer (current-buffer))
         (insert-at (point-min-marker))
         (text-no (lyskom-read-number (lyskom-get-string 'text-to-comment-q)))
         (text-stat (blocking-do 'get-text-stat text-no)))
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    (lyskom-ignore edit-buffer)
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    (lyskom-save-excursion
     (if text-stat
         (lyskom-edit-get-commented-author 
          (blocking-do 'get-text-stat text-no)
          (lyskom-get-string 'comment)
          insert-at text-no)
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       (lyskom-error "%s" (lyskom-get-string 'no-such-text-m)))
     (set-marker insert-at nil))))
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(defun kom-edit-add-recipient ()
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  "Adds a regular recipient to the text or converts an existing
recipient to a regular recipient. Using this command it is possible to
add any number of regular recipients. To remove a recipient, simply
delete the corresponding header line in the edit buffer."
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  (interactive)
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  (lyskom-edit-add-recipient/copy 'added-recipient nil 'RECPT))
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(defun kom-edit-add-bcc ()
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  "Adds a blind carbon copy recipient to the text, or converts an
existing recipient to blind carbon copy. Using this command it is
possible to add any number of regular recipients. To remove a
recipient, simply delete the corresponding header line in the edit
buffer."
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  (interactive)
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  (lyskom-edit-add-recipient/copy 'added-blank-carbon-copy nil 'BCC-RECPT))
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(defun kom-edit-add-copy ()
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  "Adds a carbon copy recipient to the text, or converts an existing
recipient to blind carbon copy. Using this command it is possible to
add any number of regular recipients. To remove a recipient, simply
delete the corresponding header line in the edit buffer."
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  (interactive)
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  (lyskom-edit-add-recipient/copy 'added-carbon-copy nil 'CC-RECPT))
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(defun kom-edit-move-text ()
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  "Adds a regular recipient to the text, or converts an existing
recipient to blind carbon copy, and converts all other recipients to
carbonn copy recipients. This command is intended for situations where
a commend is being sent to a different recipient than the commented
text was."
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  (interactive)
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  (lyskom-edit-add-recipient/copy 'who-to-move-to-q
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                                  'lyskom-edit-move-recipients))
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(defun lyskom-edit-move-recipients (conf-stat insert-at edit-buffer)
  (save-excursion
    (set-buffer edit-buffer)
    (let* ((tmp (lyskom-edit-parse-headers))
           (subject (car tmp))
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           (miscs (mapcar (lambda (x) (if (eq (car x) 'RECPT) 
                                          (cons 'CC-RECPT (cdr x)) x))
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                  (cdr (lyskom-edit-translate-headers (elt tmp 1)))))
           (aux-list (elt tmp 2))
           (elem nil))


      ;; If the new target is already a recipient, convert it to the right 
      ;; kind. Otherwise insert the new target after the last comm-to

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      (setq elem (lyskom-edit-find-misc miscs lyskom-recpt-types-list 
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                                        (conf-stat->conf-no conf-stat)))
      (if elem
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          (setcar elem 'RECPT)
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        (lyskom-insert-in-list
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         (cons 'RECPT (conf-stat->conf-no conf-stat))
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         miscs
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         (car (cdr (memq (lyskom-edit-find-misc miscs '(FOOTN-TO COMM-TO) 
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                                                nil t)
                         miscs)))))

      (lyskom-edit-replace-headers subject (cons 'MISC-LIST miscs) aux-list))))
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(defun lyskom-edit-do-add-recipient/copy (recpt-type recpt-no edit-buffer)
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  (save-excursion
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