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238 lines
7.7 KiB
EmacsLisp
238 lines
7.7 KiB
EmacsLisp
;;; mh-seq --- mh-e sequences support
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;; Time-stamp: <95/08/19 16:45:15 gildea>
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;; Copyright (C) 1993, 1995 Free Software Foundation, Inc.
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;; This file is part of mh-e, part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; 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.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; Internal support for mh-e package.
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;;; Change Log:
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;; $Id: mh-seq.el,v 1.5 1996/01/14 07:34:30 erik Exp kwzh $
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;;; Code:
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(provide 'mh-seq)
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(require 'mh-e)
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;;; Internal variables:
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(defvar mh-last-seq-used nil) ;Name of seq to which a msg was last added.
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(defvar mh-non-seq-mode-line-annotation nil) ;Saved value of mh-mode-line-annotation when narrowed to a seq.
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(defun mh-delete-seq (sequence)
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"Delete the SEQUENCE."
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(interactive (list (mh-read-seq-default "Delete" t)))
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(mh-map-to-seq-msgs 'mh-notate-if-in-one-seq sequence ? (1+ mh-cmd-note)
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sequence)
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(mh-undefine-sequence sequence '("all"))
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(mh-delete-seq-locally sequence))
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(defun mh-list-sequences (folder)
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"List the sequences defined in FOLDER."
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(interactive (list (mh-prompt-for-folder "List sequences in"
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mh-current-folder t)))
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(let ((temp-buffer mh-temp-buffer)
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(seq-list mh-seq-list))
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(with-output-to-temp-buffer temp-buffer
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(save-excursion
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(set-buffer temp-buffer)
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(erase-buffer)
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(message "Listing sequences ...")
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(insert "Sequences in folder " folder ":\n")
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(while seq-list
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(let ((name (mh-seq-name (car seq-list)))
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(sorted-seq-msgs
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(sort (copy-sequence (mh-seq-msgs (car seq-list))) '<))
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(last-col (- (window-width) 4))
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name-spec)
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(insert (setq name-spec (format "%20s:" name)))
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(while sorted-seq-msgs
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(if (> (current-column) last-col)
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(progn
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(insert "\n")
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(move-to-column (length name-spec))))
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(insert (format " %s" (car sorted-seq-msgs)))
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(setq sorted-seq-msgs (cdr sorted-seq-msgs)))
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(insert "\n"))
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(setq seq-list (cdr seq-list)))
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(goto-char (point-min))
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(message "Listing sequences...done")))))
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(defun mh-msg-is-in-seq (message)
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"Display the sequences that contain MESSAGE (default: current message)."
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(interactive (list (mh-get-msg-num t)))
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(message "Message %d is in sequences: %s"
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message
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(mapconcat 'concat
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(mh-list-to-string (mh-seq-containing-msg message t))
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" ")))
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(defun mh-narrow-to-seq (sequence)
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"Restrict display of this folder to just messages in SEQUENCE.
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Use \\<mh-folder-mode-map>\\[mh-widen] to undo this command."
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(interactive (list (mh-read-seq "Narrow to" t)))
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(with-mh-folder-updating (t)
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(cond ((mh-seq-to-msgs sequence)
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(mh-widen)
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(let ((eob (point-max)))
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(mh-copy-seq-to-point sequence eob)
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(narrow-to-region eob (point-max))
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(make-variable-buffer-local 'mh-non-seq-mode-line-annotation)
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(setq mh-non-seq-mode-line-annotation mh-mode-line-annotation)
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(setq mh-mode-line-annotation (symbol-name sequence))
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(mh-make-folder-mode-line)
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(mh-recenter nil)
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(setq mh-narrowed-to-seq sequence)))
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(t
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(error "No messages in sequence `%s'" (symbol-name sequence))))))
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(defun mh-put-msg-in-seq (msg-or-seq sequence)
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"Add MESSAGE(s) (default: displayed message) to SEQUENCE.
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If optional prefix argument provided, then prompt for the message sequence."
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(interactive (list (if current-prefix-arg
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(mh-read-seq-default "Add messages from" t)
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(mh-get-msg-num t))
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(mh-read-seq-default "Add to" nil)))
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(if (not (mh-internal-seq sequence))
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(setq mh-last-seq-used sequence))
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(mh-add-msgs-to-seq (if (numberp msg-or-seq)
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msg-or-seq
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(mh-seq-to-msgs msg-or-seq))
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sequence))
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(defun mh-widen ()
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"Remove restrictions from current folder, thereby showing all messages."
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(interactive)
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(if mh-narrowed-to-seq
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(with-mh-folder-updating (t)
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(delete-region (point-min) (point-max))
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(widen)
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(setq mh-mode-line-annotation mh-non-seq-mode-line-annotation)
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(mh-make-folder-mode-line)))
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(setq mh-narrowed-to-seq nil))
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;;; Commands to manipulate sequences. Sequences are stored in an alist
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;;; of the form:
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;;; ((seq-name msgs ...) (seq-name msgs ...) ...)
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(defun mh-read-seq-default (prompt not-empty)
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;; Read and return sequence name with default narrowed or previous sequence.
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(mh-read-seq prompt not-empty
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(or mh-narrowed-to-seq
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mh-last-seq-used
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(car (mh-seq-containing-msg (mh-get-msg-num nil) nil)))))
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(defun mh-read-seq (prompt not-empty &optional default)
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;; Read and return a sequence name. Prompt with PROMPT, raise an error
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;; if the sequence is empty and the NOT-EMPTY flag is non-nil, and supply
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;; an optional DEFAULT sequence.
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;; A reply of '%' defaults to the first sequence containing the current
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;; message.
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(let* ((input (completing-read (format "%s %s %s" prompt "sequence:"
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(if default
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(format "[%s] " default)
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""))
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(mh-seq-names mh-seq-list)))
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(seq (cond ((equal input "%")
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(car (mh-seq-containing-msg (mh-get-msg-num t) nil)))
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((equal input "") default)
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(t (intern input))))
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(msgs (mh-seq-to-msgs seq)))
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(if (and (null msgs) not-empty)
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(error "No messages in sequence `%s'" seq))
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seq))
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(defun mh-seq-names (seq-list)
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;; Return an alist containing the names of the SEQUENCES.
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(mapcar (function (lambda (entry) (list (symbol-name (mh-seq-name entry)))))
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seq-list))
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(defun mh-rename-seq (sequence new-name)
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"Rename SEQUENCE to have NEW-NAME."
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(interactive (list (mh-read-seq "Old" t)
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(intern (read-string "New sequence name: "))))
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(let ((old-seq (mh-find-seq sequence)))
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(or old-seq
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(error "Sequence %s does not exist" sequence))
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;; create new sequence first, since it might raise an error.
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(mh-define-sequence new-name (mh-seq-msgs old-seq))
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(mh-undefine-sequence sequence (mh-seq-msgs old-seq))
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(rplaca old-seq new-name)))
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(defun mh-map-to-seq-msgs (func seq &rest args)
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;; Invoke the FUNCTION at each message in the SEQUENCE, passing the
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;; remaining ARGS as arguments.
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(save-excursion
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(let ((msgs (mh-seq-to-msgs seq)))
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(while msgs
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(if (mh-goto-msg (car msgs) t t)
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(apply func (car msgs) args))
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(setq msgs (cdr msgs))))))
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(defun mh-notate-seq (seq notation offset)
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;; Mark the scan listing of all messages in the SEQUENCE with the CHARACTER
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;; at the given OFFSET from the beginning of the listing line.
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(mh-map-to-seq-msgs 'mh-notate seq notation offset))
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(defun mh-add-to-sequence (seq msgs)
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;; Add to a SEQUENCE each message the list of MSGS.
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(if (not (mh-folder-name-p seq))
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(if msgs
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(apply 'mh-exec-cmd "mark" mh-current-folder "-add"
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"-sequence" (symbol-name seq)
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(mh-coalesce-msg-list msgs)))))
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(defun mh-copy-seq-to-point (seq location)
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;; Copy the scan listing of the messages in SEQUENCE to after the point
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;; LOCATION in the current buffer.
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(mh-map-to-seq-msgs 'mh-copy-line-to-point seq location))
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(defun mh-copy-line-to-point (msg location)
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;; Copy the current line to the LOCATION in the current buffer.
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(beginning-of-line)
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(save-excursion
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(let ((beginning-of-line (point))
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end)
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(forward-line 1)
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(setq end (point))
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(goto-char location)
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(insert-buffer-substring (current-buffer) beginning-of-line end))))
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