mirror of
https://git.savannah.gnu.org/git/emacs.git
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c919c21a69
to mh-utils.el for Emacs 19.23, which doesn't define them in paths.el (mh-find-progs): Add paths for BSDI. Put local paths first so they override vendor paths. (with-mh-folder-updating): Optimize to keep buffer-file-name nil even while restoring modified-p status at end.
844 lines
29 KiB
EmacsLisp
844 lines
29 KiB
EmacsLisp
;;; mh-utils.el --- mh-e code needed for both sending and reading
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;; Time-stamp: <94/04/11 20:56:35 gildea>
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;; Copyright 1993 Free Software Foundation, Inc.
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;; This file is part of mh-e.
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;; mh-e 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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;; mh-e 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 mh-e; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Commentary:
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;; Internal support for mh-e package.
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;;; Code:
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;;; Set for local environment:
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;;; mh-progs and mh-lib used to be set in paths.el, which tried to
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;;; figure out at build time which of several possible directories MH
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;;; was installed into. But if you installed MH after building Emacs,
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;;; this would almost certainly be wrong, so now we do it at run time.
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(defvar mh-progs nil
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"Directory containing MH commands, such as inc, repl, and rmm.")
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(defvar mh-lib nil
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"Directory containing the MH library.
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This directory contains, among other things,
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the mhl program and the components file.")
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;;; User preferences:
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(defvar mh-auto-folder-collect t
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"*Whether to start collecting MH folder names immediately in the background.
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Non-nil means start a background process collecting the names of all
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folders as soon as mh-e is loaded.")
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(defvar mh-recursive-folders nil
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"*If non-nil, then commands which operate on folders do so recursively.")
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(defvar mh-clean-message-header nil
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"*Non-nil means clean headers of messages that are displayed or inserted.
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The variables `mh-visible-headers' and `mh-invisible-headers' control what
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is removed.")
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(defvar mh-visible-headers nil
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"*If non-nil, contains a regexp specifying the headers to keep when cleaning.
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Only used if `mh-clean-message-header' is non-nil. Setting this variable
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overrides `mh-invisible-headers'.")
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(defvar mh-invisible-headers
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"^Received: \\|^Message-Id: \\|^Remailed-\\|^Via: \\|^Mail-from: \\|^Return-Path: \\|^In-Reply-To: \\|^Resent-"
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"Regexp matching lines in a message header that are not to be shown.
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If `mh-visible-headers' is non-nil, it is used instead to specify what
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to keep.")
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(defvar mh-bury-show-buffer t
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"*Non-nil means that the displayed show buffer for a folder is buried.")
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(defvar mh-summary-height 4
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"*Number of lines in MH-Folder window (including the mode line).")
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(defvar mh-msg-number-regexp "^ *\\([0-9]+\\)"
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"Regexp to find the number of a message in a scan line.
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The message's number must be surrounded with \\( \\)")
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(defvar mh-msg-search-regexp "^[^0-9]*%d[^0-9]"
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"Format string containing a regexp matching the scan listing for a message.
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The desired message's number will be an argument to format.")
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(defvar mhl-formfile nil
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"*Name of format file to be used by mhl to show and print messages.
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A value of T means use the default format file.
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Nil means don't use mhl to format messages when showing; mhl is still used,
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with the default format file, to format messages when printing them.
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The format used should specify a non-zero value for overflowoffset so
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the message continues to conform to RFC 822 and mh-e can parse the headers.")
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(defvar mh-msg-folder-hook nil
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"Select a default folder for refiling or Fcc.
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Called by `\\[mh-refile-msg]' and `\\[mh-to-fcc]' to get a default
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when prompting the user for a folder. Called from within a save-excursion,
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with point at the start of the message. Should return the folder to offer
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as the refile or Fcc folder, as a string with a leading `+' sign.")
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(defvar mh-cmd-note 4
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"Offset to insert notation.")
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(defvar mh-folder-list nil
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"List of folder names for completion.")
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(defvar mh-user-path nil
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"User's mail folder directory.")
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(defvar mh-draft-folder nil
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"Name of folder containing draft messages.
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NIL means do not use draft folder.")
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(defvar mh-previous-window-config nil
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"Window configuration before mh-e command.")
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(defvar mh-current-folder nil
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"Name of current folder, a string.")
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(defvar mh-folder-filename nil
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"Full path of directory for this folder.")
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(defvar mh-show-buffer nil
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"Buffer that displays mesage for this folder.")
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(defvar mh-unseen-seq nil
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"Name of the Unseen sequence.")
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(defvar mh-previous-seq nil
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"Name of the Previous sequence.")
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(defvar mh-seen-list nil
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"List of displayed messages.")
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(defvar mh-seq-list nil
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"Alist of (seq . msgs) numbers.")
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(defvar mh-showing nil
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"If non-nil, show the message in a separate window.")
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(defvar mh-showing-with-headers nil
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"If non-nil, show buffer contains message with all headers.
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If nil, show buffer contains message processed normally.")
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;;; mh-e macros
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(defmacro with-mh-folder-updating (save-modification-flag-p &rest body)
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;; Format is (with-mh-folder-updating (SAVE-MODIFICATION-FLAG-P) &body BODY).
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;; Execute BODY, which can modify the folder buffer without having to
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;; worry about file locking or the read-only flag, and return its result.
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;; If SAVE-MODIFICATION-FLAG-P is non-nil, the buffer's modification
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;; flag is unchanged, otherwise it is cleared.
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(setq save-modification-flag-p (car save-modification-flag-p)) ; CL style
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(` (prog1
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(let ((mh-folder-updating-mod-flag (buffer-modified-p))
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(buffer-read-only nil)
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(buffer-file-name nil)) ;don't let the buffer get locked
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(prog1
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(progn
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(,@ body))
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(mh-set-folder-modified-p mh-folder-updating-mod-flag)))
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(,@ (if (not save-modification-flag-p)
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'((mh-set-folder-modified-p nil)))))))
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(put 'with-mh-folder-updating 'lisp-indent-hook 1)
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(defmacro mh-in-show-buffer (show-buffer &rest body)
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;; Format is (mh-in-show-buffer (show-buffer) &body BODY).
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;; Display buffer SHOW-BUFFER in other window and execute BODY in it.
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;; Stronger than save-excursion, weaker than save-window-excursion.
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(setq show-buffer (car show-buffer)) ; CL style
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(` (let ((mh-in-show-buffer-saved-window (selected-window)))
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(switch-to-buffer-other-window (, show-buffer))
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(if mh-bury-show-buffer (bury-buffer (current-buffer)))
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(unwind-protect
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(progn
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(,@ body))
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(select-window mh-in-show-buffer-saved-window)))))
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(put 'mh-in-show-buffer 'lisp-indent-hook 1)
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(defmacro mh-seq-name (pair) (list 'car pair))
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(defmacro mh-seq-msgs (pair) (list 'cdr pair))
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;;; Ensure new buffers won't get this mode if default-major-mode is nil.
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(put 'mh-show-mode 'mode-class 'special)
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(defun mh-show-mode ()
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"Major mode for showing messages in mh-e.
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The value of mh-show-mode-hook is called when a new message is displayed."
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(kill-all-local-variables)
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(setq major-mode 'mh-show-mode)
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(mh-set-mode-name "MH-Show")
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(run-hooks 'mh-show-mode-hook))
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(defun mh-maybe-show (&optional msg)
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;; If in showing mode, then display the message pointed to by the cursor.
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(if mh-showing (mh-show msg)))
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(defun mh-show (&optional msg)
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"Show MESSAGE (default: message at cursor).
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Force a two-window display with the folder window on top (size
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mh-summary-height) and the show buffer below it.
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If the message is already visible, display the start of the message.
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Display of the message is controlled by setting the variables
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`mh-clean-message-header' and `mhl-formfile'. The default behavior is
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to scroll uninteresting headers off the top of the window.
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Type \"\\[mh-header-display]\" to see the message with all its headers."
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(interactive)
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(and mh-showing-with-headers
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(or mhl-formfile mh-clean-message-header)
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(mh-invalidate-show-buffer))
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(mh-show-msg msg))
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(defun mh-show-msg (msg)
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(if (not msg)
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(setq msg (mh-get-msg-num t)))
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(setq mh-showing t)
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(let ((folder mh-current-folder)
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(clean-message-header mh-clean-message-header)
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(show-window (get-buffer-window mh-show-buffer)))
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(if (not (eql (next-window (minibuffer-window)) (selected-window)))
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(delete-other-windows)) ; force ourself to the top window
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(mh-in-show-buffer (mh-show-buffer)
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(if (and show-window
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(equal (mh-msg-filename msg folder) buffer-file-name))
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(progn ;just back up to start
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(goto-char (point-min))
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(if (not clean-message-header)
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(mh-start-of-uncleaned-message)))
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(mh-display-msg msg folder))))
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(if (not (= (1+ (window-height)) (screen-height))) ;not horizontally split
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(shrink-window (- (window-height) mh-summary-height)))
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(mh-recenter nil)
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(if (not (memq msg mh-seen-list)) (setq mh-seen-list (cons msg mh-seen-list)))
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(run-hooks 'mh-show-hook))
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(defun mh-display-msg (msg-num folder)
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;; Display message NUMBER of FOLDER.
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;; Sets the current buffer to the show buffer.
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(set-buffer folder)
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;; Bind variables in folder buffer in case they are local
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(let ((formfile mhl-formfile)
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(clean-message-header mh-clean-message-header)
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(invisible-headers mh-invisible-headers)
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(visible-headers mh-visible-headers)
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(msg-filename (mh-msg-filename msg-num))
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(show-buffer mh-show-buffer))
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(if (not (file-exists-p msg-filename))
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(error "Message %d does not exist" msg-num))
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(set-buffer show-buffer)
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(cond ((not (equal msg-filename buffer-file-name))
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;; Buffer does not yet contain message.
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(clear-visited-file-modtime)
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(unlock-buffer)
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(setq buffer-file-name nil) ; no locking during setup
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(erase-buffer)
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(if formfile
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(mh-exec-lib-cmd-output "mhl" "-nobell" "-noclear"
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(if (stringp formfile)
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(list "-form" formfile))
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msg-filename)
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(insert-file-contents msg-filename))
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(goto-char (point-min))
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(cond (clean-message-header
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(mh-clean-msg-header (point-min)
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invisible-headers
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visible-headers)
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(goto-char (point-min)))
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(t
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(mh-start-of-uncleaned-message)))
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(set-buffer-modified-p nil)
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(or (eq buffer-undo-list t) ;don't save undo info for prev msgs
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(setq buffer-undo-list nil))
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(setq buffer-file-name msg-filename)
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(set-mark nil)
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(mh-show-mode)
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(setq mode-line-buffer-identification
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(list (format mh-show-buffer-mode-line-buffer-id
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folder msg-num)))
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(set-buffer folder)
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(setq mh-showing-with-headers nil)))))
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(defun mh-start-of-uncleaned-message ()
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;; position uninteresting headers off the top of the window
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(let ((case-fold-search t))
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(re-search-forward
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"^To:\\|^From:\\|^Subject:\\|^Date:" nil t)
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(beginning-of-line)
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(mh-recenter 0)))
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(defun mh-invalidate-show-buffer ()
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;; Invalidate the show buffer so we must update it to use it.
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(if (get-buffer mh-show-buffer)
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(save-excursion
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(set-buffer mh-show-buffer)
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(setq buffer-file-name nil))))
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(defun mh-get-msg-num (error-if-no-message)
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;; Return the message number of the displayed message. If the argument
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;; ERROR-IF-NO-MESSAGE is non-nil, then complain if the cursor is not
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;; pointing to a message.
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(save-excursion
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(beginning-of-line)
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(cond ((looking-at mh-msg-number-regexp)
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(string-to-int (buffer-substring (match-beginning 1)
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(match-end 1))))
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(error-if-no-message
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(error "Cursor not pointing to message"))
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(t nil))))
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(defun mh-msg-filename (msg &optional folder)
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;; Return the file name of MESSAGE in FOLDER (default current folder).
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(expand-file-name (int-to-string msg)
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(if folder
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(mh-expand-file-name folder)
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mh-folder-filename)))
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(defun mh-clean-msg-header (start invisible-headers visible-headers)
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;; Flush extraneous lines in a message header, from the given POINT to the
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;; end of the message header. If VISIBLE-HEADERS is non-nil, it contains a
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;; regular expression specifying the lines to display, otherwise
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;; INVISIBLE-HEADERS contains a regular expression specifying lines to
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;; delete from the header.
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(let ((case-fold-search t))
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(save-restriction
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(goto-char start)
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(if (search-forward "\n\n" nil 'move)
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(backward-char 1))
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(narrow-to-region start (point))
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(goto-char (point-min))
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(if visible-headers
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(while (< (point) (point-max))
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(cond ((looking-at visible-headers)
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(forward-line 1)
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(while (looking-at "[ \t]") (forward-line 1)))
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(t
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(mh-delete-line 1)
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(while (looking-at "[ \t]")
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(mh-delete-line 1)))))
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(while (re-search-forward invisible-headers nil t)
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(beginning-of-line)
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(mh-delete-line 1)
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(while (looking-at "[ \t]")
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(mh-delete-line 1))))
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(unlock-buffer))))
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(defun mh-recenter (arg)
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;; Like recenter but with two improvements: nil arg means recenter,
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;; and only does anything if the current buffer is in the selected
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;; window. (Commands like save-some-buffers can make this false.)
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(if (eql (get-buffer-window (current-buffer))
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(selected-window))
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(recenter (if arg arg '(t)))))
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(defun mh-delete-line (lines)
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;; Delete version of kill-line.
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(delete-region (point) (save-excursion (forward-line lines) (point))))
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(defun mh-get-field (field)
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;; Find and return the value of field FIELD in the current buffer.
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;; Returns the empty string if the field is not in the message.
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(let ((case-fold-search t))
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(goto-char (point-min))
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(cond ((not (re-search-forward (format "^%s" field) nil t)) "")
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((looking-at "[\t ]*$") "")
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(t
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(re-search-forward "[\t ]*\\([^\t \n].*\\)$" nil t)
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(let ((start (match-beginning 1)))
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(forward-line 1)
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(while (looking-at "[ \t]")
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(forward-line 1))
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(buffer-substring start (1- (point))))))))
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(defun mh-notate (msg notation offset)
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;; Marks MESSAGE with the character NOTATION at position OFFSET.
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;; Null MESSAGE means the message that the cursor points to.
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(save-excursion
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(if (or (null msg)
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(mh-goto-msg msg t t))
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(with-mh-folder-updating (t)
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(beginning-of-line)
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(forward-char offset)
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(delete-char 1)
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(insert notation)))))
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(defun mh-goto-msg (number &optional no-error-if-no-message dont-show)
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"Position the cursor at message NUMBER.
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Non-nil second argument means do not signal an error if message does not exist.
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Non-nil third argument means not to show the message.
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Return non-nil if cursor is at message."
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(interactive "NJump to message: ")
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(let ((cur-msg (mh-get-msg-num nil))
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(starting-place (point))
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(msg-pattern (mh-msg-search-pat number)))
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(cond ((cond ((and cur-msg (= cur-msg number)) t)
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((and cur-msg
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(< cur-msg number)
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(re-search-forward msg-pattern nil t)) t)
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((and cur-msg
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(> cur-msg number)
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(re-search-backward msg-pattern nil t)) t)
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(t ; Do thorough search of buffer
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(goto-char (point-max))
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(re-search-backward msg-pattern nil t)))
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(beginning-of-line)
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(if (not dont-show) (mh-maybe-show number))
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t)
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(t
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(goto-char starting-place)
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(if (not no-error-if-no-message)
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(error "No message %d" number))
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nil))))
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(defun mh-msg-search-pat (n)
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;; Return a search pattern for message N in the scan listing.
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(format mh-msg-search-regexp n))
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(defun mh-find-path ()
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;; Set mh-progs and mh-lib.
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;; (This step is necessary if MH was installed after this Emacs was dumped.)
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;; Set mh-user-path, mh-draft-folder,
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;; mh-unseen-seq, and mh-previous-seq from profile file.
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(mh-find-progs)
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(save-excursion
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;; Be sure profile is fully expanded before switching buffers
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(let ((profile (expand-file-name (or (getenv "MH") "~/.mh_profile"))))
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(set-buffer (get-buffer-create " *mh-temp*"))
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(setq buffer-offer-save nil) ;for people who set default to t
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(erase-buffer)
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(condition-case err
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(insert-file-contents profile)
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(file-error
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(mh-install profile err)))
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(setq mh-draft-folder (mh-get-field "Draft-Folder:"))
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(cond ((equal mh-draft-folder "")
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(setq mh-draft-folder nil))
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((not (mh-folder-name-p mh-draft-folder))
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(setq mh-draft-folder (format "+%s" mh-draft-folder))))
|
|
(setq mh-user-path (mh-get-field "Path:"))
|
|
(if (equal mh-user-path "")
|
|
(setq mh-user-path "Mail"))
|
|
(setq mh-user-path
|
|
(file-name-as-directory
|
|
(expand-file-name mh-user-path (expand-file-name "~"))))
|
|
(if (and mh-draft-folder
|
|
(not (file-exists-p (mh-expand-file-name mh-draft-folder))))
|
|
(error "Draft folder \"%s\" not found. Create it and try again."
|
|
(mh-expand-file-name mh-draft-folder)))
|
|
(setq mh-unseen-seq (mh-get-field "Unseen-Sequence:"))
|
|
(if (equal mh-unseen-seq "")
|
|
(setq mh-unseen-seq 'unseen) ;old MH default?
|
|
(setq mh-unseen-seq (intern mh-unseen-seq)))
|
|
(setq mh-previous-seq (mh-get-field "Previous-Sequence:"))
|
|
(if (equal mh-previous-seq "")
|
|
(setq mh-previous-seq nil)
|
|
(setq mh-previous-seq (intern mh-previous-seq))))))
|
|
|
|
(defun mh-find-progs ()
|
|
(or (file-exists-p (expand-file-name "inc" mh-progs))
|
|
(setq mh-progs
|
|
(or (mh-path-search exec-path "inc")
|
|
(mh-path-search '("/usr/local/bin/mh/"
|
|
"/usr/local/mh/"
|
|
"/usr/bin/mh/" ;Ultrix 4.2
|
|
"/usr/new/mh/" ;Ultrix <4.2
|
|
"/usr/contrib/mh/bin" ;BSDI
|
|
)
|
|
"inc")
|
|
"/usr/local/bin/")))
|
|
(or (file-exists-p (expand-file-name "mhl" mh-lib))
|
|
(setq mh-lib
|
|
(or (mh-path-search '("/usr/local/lib/mh/"
|
|
"/usr/lib/mh/" ;Ultrix 4.2
|
|
"/usr/new/lib/mh/" ;Ultrix <4.2
|
|
"/usr/contrib/mh/lib" ;BSDI
|
|
)
|
|
"mhl")
|
|
(mh-path-search exec-path "mhl") ;unlikely
|
|
"/usr/local/bin/mh/"))))
|
|
|
|
(defun mh-path-search (path file)
|
|
;; Search PATH, a list of directory names, for FILE.
|
|
;; Returns the element of PATH that contains FILE, or nil if not found.
|
|
(while (and path
|
|
(not (file-exists-p (expand-file-name file (car path)))))
|
|
(setq path (cdr path)))
|
|
(car path))
|
|
|
|
(defun mh-install (profile error-val)
|
|
;; Called to do error recovery if we fail to read the profile file.
|
|
;; If possible, initialize the MH environment.
|
|
(if (or (getenv "MH")
|
|
(file-exists-p profile))
|
|
(error "Cannot read MH profile \"%s\": %s"
|
|
profile (car (cdr (cdr error-val)))))
|
|
;; The "install-mh" command will output a short note which
|
|
;; mh-exec-cmd will display to the user.
|
|
(mh-exec-cmd (expand-file-name "install-mh" mh-lib) "-auto")
|
|
;; now try again to read the profile file
|
|
(erase-buffer)
|
|
(condition-case err
|
|
(insert-file-contents profile)
|
|
(file-error
|
|
(error "Cannot read MH profile \"%s\": %s"
|
|
profile (car (cdr (cdr err)))))))
|
|
|
|
|
|
(defun mh-set-folder-modified-p (flag)
|
|
"Mark current folder as modified or unmodified according to FLAG."
|
|
(set-buffer-modified-p flag))
|
|
|
|
|
|
(defun mh-find-seq (name) (assoc name mh-seq-list))
|
|
|
|
(defun mh-make-seq (name msgs) (cons name msgs))
|
|
|
|
(defun mh-seq-to-msgs (seq)
|
|
"Return a list of the messages in SEQUENCE."
|
|
(mh-seq-msgs (mh-find-seq seq)))
|
|
|
|
|
|
(defun mh-add-msgs-to-seq (msgs seq &optional internal-flag)
|
|
;; Add MESSAGE(s) to the SEQUENCE. If optional FLAG is non-nil, do not mark
|
|
;; the message in the scan listing or inform MH of the addition.
|
|
(let ((entry (mh-find-seq seq)))
|
|
(if (and msgs (atom msgs)) (setq msgs (list msgs)))
|
|
(if (null entry)
|
|
(setq mh-seq-list (cons (mh-make-seq seq msgs) mh-seq-list))
|
|
(if msgs (setcdr entry (append msgs (cdr entry)))))
|
|
(cond ((not internal-flag)
|
|
(mh-add-to-sequence seq msgs)
|
|
(mh-notate-seq seq ?% (1+ mh-cmd-note))))))
|
|
|
|
(autoload 'mh-add-to-sequence "mh-seq")
|
|
(autoload 'mh-notate-seq "mh-seq")
|
|
(autoload 'mh-read-seq-default "mh-seq")
|
|
(autoload 'mh-map-to-seq-msgs "mh-seq")
|
|
|
|
|
|
(defun mh-set-mode-name (mode-name-string)
|
|
;; Set the mode-name and ensure that the mode line is updated.
|
|
(setq mode-name mode-name-string)
|
|
;; Force redisplay of all buffers' mode lines to be considered.
|
|
(save-excursion (set-buffer (other-buffer)))
|
|
(set-buffer-modified-p (buffer-modified-p)))
|
|
|
|
|
|
(defun mh-prompt-for-folder (prompt default can-create)
|
|
;; Prompt for a folder name with PROMPT. Returns the folder's name as a
|
|
;; string. DEFAULT is used if the folder exists and the user types return.
|
|
;; If the CAN-CREATE flag is t, then a non-existent folder is made.
|
|
(if (null default)
|
|
(setq default ""))
|
|
(let* ((prompt (format "%s folder%s" prompt
|
|
(if (equal "" default)
|
|
"? "
|
|
(format " [%s]? " default))))
|
|
read-name folder-name)
|
|
(if (null mh-folder-list)
|
|
(mh-set-folder-list))
|
|
(while (and (setq read-name (completing-read prompt mh-folder-list
|
|
nil nil "+"))
|
|
(equal read-name "")
|
|
(equal default "")))
|
|
(cond ((or (equal read-name "") (equal read-name "+"))
|
|
(setq read-name default))
|
|
((not (mh-folder-name-p read-name))
|
|
(setq read-name (format "+%s" read-name))))
|
|
(setq folder-name read-name)
|
|
(cond ((and (> (length folder-name) 0)
|
|
(eql (aref folder-name (1- (length folder-name))) ?/))
|
|
(setq folder-name (substring folder-name 0 -1))))
|
|
(let ((new-file-p (not (file-exists-p (mh-expand-file-name folder-name)))))
|
|
(cond ((and new-file-p
|
|
(y-or-n-p
|
|
(format "Folder %s does not exist. Create it? " folder-name)))
|
|
(message "Creating %s" folder-name)
|
|
(call-process "mkdir" nil nil nil (mh-expand-file-name folder-name))
|
|
(message "Creating %s...done" folder-name)
|
|
(setq mh-folder-list (cons (list read-name) mh-folder-list)))
|
|
(new-file-p
|
|
(error "Folder %s is not created" folder-name))
|
|
((and (null (assoc read-name mh-folder-list))
|
|
(null (assoc (concat read-name "/") mh-folder-list)))
|
|
(setq mh-folder-list (cons (list read-name) mh-folder-list)))))
|
|
folder-name))
|
|
|
|
|
|
(defvar mh-make-folder-list-process nil
|
|
"The background process collecting the folder list.")
|
|
|
|
(defvar mh-folder-list-temp nil
|
|
"mh-folder-list as it is being built.")
|
|
|
|
(defvar mh-folder-list-partial-line ""
|
|
"Start of last incomplete line from folder process.")
|
|
|
|
(defun mh-set-folder-list ()
|
|
"Sets mh-folder-list correctly.
|
|
A useful function for the command line or for when you need to sync by hand.
|
|
Format is in a form suitable for completing read."
|
|
(message "Collecting folder names...")
|
|
(if (not mh-make-folder-list-process)
|
|
(mh-make-folder-list-background))
|
|
(while (eq (process-status mh-make-folder-list-process) 'run)
|
|
(accept-process-output mh-make-folder-list-process))
|
|
(setq mh-folder-list mh-folder-list-temp)
|
|
(setq mh-folder-list-temp nil)
|
|
(delete-process mh-make-folder-list-process)
|
|
(setq mh-make-folder-list-process nil)
|
|
(message "Collecting folder names...done"))
|
|
|
|
(defun mh-make-folder-list-background ()
|
|
"Start a background process to compute a list of the user's folders.
|
|
Call mh-set-folder-list to wait for the result."
|
|
(cond
|
|
((not mh-make-folder-list-process)
|
|
(mh-find-progs)
|
|
(let ((process-connection-type nil))
|
|
(setq mh-make-folder-list-process
|
|
(start-process "folders" nil (expand-file-name "folders" mh-progs)
|
|
"-fast"
|
|
(if mh-recursive-folders
|
|
"-recurse"
|
|
"-norecurse")))
|
|
(set-process-filter mh-make-folder-list-process
|
|
'mh-make-folder-list-filter)
|
|
(process-kill-without-query mh-make-folder-list-process)))))
|
|
|
|
(defun mh-make-folder-list-filter (process output)
|
|
;; parse output from "folders -fast"
|
|
(let ((position 0)
|
|
(line-end t)
|
|
new-folder)
|
|
(while line-end
|
|
(setq line-end (string-match "\n" output position))
|
|
(cond
|
|
(line-end ;make sure got complete line
|
|
(setq new-folder (format "+%s%s"
|
|
mh-folder-list-partial-line
|
|
(substring output position line-end)))
|
|
(setq mh-folder-list-partial-line "")
|
|
;; is new folder a subfolder of previous?
|
|
(if (and mh-folder-list-temp
|
|
(string-match (regexp-quote
|
|
(concat (car (car mh-folder-list-temp)) "/"))
|
|
new-folder))
|
|
;; append slash to parent folder for better completion
|
|
;; (undone by mh-prompt-for-folder)
|
|
(setq mh-folder-list-temp
|
|
(cons (list new-folder)
|
|
(cons
|
|
(list (concat (car (car mh-folder-list-temp)) "/"))
|
|
(cdr mh-folder-list-temp))))
|
|
(setq mh-folder-list-temp
|
|
(cons (list new-folder)
|
|
mh-folder-list-temp)))
|
|
(setq position (1+ line-end)))))
|
|
(setq mh-folder-list-partial-line (substring output position))))
|
|
|
|
|
|
(defun mh-folder-name-p (name)
|
|
;; Return non-NIL if NAME is possibly the name of a folder.
|
|
;; A name (a string or symbol) can be a folder name if it begins with "+".
|
|
(if (symbolp name)
|
|
(eql (aref (symbol-name name) 0) ?+)
|
|
(and (> (length name) 0)
|
|
(eql (aref name 0) ?+))))
|
|
|
|
|
|
;;; Issue commands to MH.
|
|
|
|
|
|
(defun mh-exec-cmd (command &rest args)
|
|
;; Execute mh-command COMMAND with ARGS.
|
|
;; Any output is assumed to be an error and is shown to the user.
|
|
(save-excursion
|
|
(set-buffer (get-buffer-create " *mh-temp*"))
|
|
(erase-buffer)
|
|
(apply 'call-process
|
|
(expand-file-name command mh-progs) nil t nil
|
|
(mh-list-to-string args))
|
|
(if (> (buffer-size) 0)
|
|
(save-window-excursion
|
|
(switch-to-buffer-other-window " *mh-temp*")
|
|
(sit-for 5)))))
|
|
|
|
|
|
(defun mh-exec-cmd-error (env command &rest args)
|
|
;; In environment ENV, execute mh-command COMMAND with args ARGS.
|
|
;; ENV is nil or a string of space-separated "var=value" elements.
|
|
;; Signals an error if process does not complete successfully.
|
|
(save-excursion
|
|
(set-buffer (get-buffer-create " *mh-temp*"))
|
|
(erase-buffer)
|
|
(let ((status
|
|
(if env
|
|
;; the shell hacks necessary here shows just how broken Unix is
|
|
(apply 'call-process "/bin/sh" nil t nil "-c"
|
|
(format "%s %s ${1+\"$@\"}"
|
|
env
|
|
(expand-file-name command mh-progs))
|
|
command
|
|
(mh-list-to-string args))
|
|
(apply 'call-process
|
|
(expand-file-name command mh-progs) nil t nil
|
|
(mh-list-to-string args)))))
|
|
(mh-handle-process-error command status))))
|
|
|
|
|
|
(defun mh-exec-cmd-daemon (command &rest args)
|
|
;; Execute MH command COMMAND with ARGS. Any output from command is
|
|
;; displayed in an asynchronous pop-up window.
|
|
(save-excursion
|
|
(set-buffer (get-buffer-create " *mh-temp*"))
|
|
(erase-buffer))
|
|
(let* ((process-connection-type nil)
|
|
(process (apply 'start-process
|
|
command nil
|
|
(expand-file-name command mh-progs)
|
|
(mh-list-to-string args))))
|
|
(set-process-filter process 'mh-process-daemon)))
|
|
|
|
(defun mh-process-daemon (process output)
|
|
;; Process daemon that puts output into a temporary buffer.
|
|
(set-buffer (get-buffer-create " *mh-temp*"))
|
|
(insert-before-markers output)
|
|
(display-buffer " *mh-temp*"))
|
|
|
|
|
|
(defun mh-exec-cmd-quiet (raise-error command &rest args)
|
|
;; Args are RAISE-ERROR, COMMANDS, ARGS....
|
|
;; Execute MH command COMMAND with ARGS. ARGS is a list of strings.
|
|
;; Return at start of mh-temp buffer, where output can be parsed and used.
|
|
;; Returns value of call-process, which is 0 for success,
|
|
;; unless RAISE-ERROR is non-nil, in which case an error is signaled
|
|
;; if call-process returns non-0.
|
|
(set-buffer (get-buffer-create " *mh-temp*"))
|
|
(erase-buffer)
|
|
(let ((value
|
|
(apply 'call-process
|
|
(expand-file-name command mh-progs) nil t nil
|
|
args)))
|
|
(goto-char (point-min))
|
|
(if raise-error
|
|
(mh-handle-process-error command value)
|
|
value)))
|
|
|
|
|
|
(defun mh-exec-cmd-output (command display &rest args)
|
|
;; Execute MH command COMMAND with DISPLAY flag and ARGS.
|
|
;; Put the output into buffer after point. Set mark after inserted text.
|
|
(push-mark (point) t)
|
|
(apply 'call-process
|
|
(expand-file-name command mh-progs) nil t display
|
|
(mh-list-to-string args))
|
|
(exchange-point-and-mark))
|
|
|
|
|
|
(defun mh-exec-lib-cmd-output (command &rest args)
|
|
;; Execute MH library command COMMAND with ARGS.
|
|
;; Put the output into buffer after point. Set mark after inserted text.
|
|
(apply 'mh-exec-cmd-output (expand-file-name command mh-lib) nil args))
|
|
|
|
|
|
(defun mh-handle-process-error (command status)
|
|
;; Raise error if COMMAND returned non-0 STATUS, otherwise return STATUS.
|
|
;; STATUS is return value from call-process.
|
|
;; Program output is in current buffer.
|
|
;; If output is too long ot include in error message, display the bufffer.
|
|
(cond ((eql status 0) ;success
|
|
status)
|
|
((stringp status) ;kill string
|
|
(error (format "%s: %s" command status)))
|
|
(t ;exit code
|
|
(cond
|
|
((= (buffer-size) 0) ;program produced no error message
|
|
(error (format "%s: exit code %d" command status)))
|
|
(t
|
|
;; will error message fit on one line?
|
|
(goto-line 2)
|
|
(if (and (< (buffer-size) (screen-width))
|
|
(eobp))
|
|
(error (buffer-substring 1 (progn (goto-char 1)
|
|
(end-of-line)
|
|
(point))))
|
|
(display-buffer (current-buffer))
|
|
(error (format
|
|
"%s failed with status %d. See error message in other window."
|
|
command status))))))))
|
|
|
|
|
|
(defun mh-expand-file-name (filename &optional default)
|
|
"Just like `expand-file-name', but also handles MH folder names.
|
|
Assumes that any filename that starts with '+' is a folder name."
|
|
(if (mh-folder-name-p filename)
|
|
(expand-file-name (substring filename 1) mh-user-path)
|
|
(expand-file-name filename default)))
|
|
|
|
|
|
(defun mh-list-to-string (l)
|
|
;; Flattens the list L and makes every element of the new list into a string.
|
|
(nreverse (mh-list-to-string-1 l)))
|
|
|
|
(defun mh-list-to-string-1 (l)
|
|
(let ((new-list nil))
|
|
(while l
|
|
(cond ((null (car l)))
|
|
((symbolp (car l))
|
|
(setq new-list (cons (symbol-name (car l)) new-list)))
|
|
((numberp (car l))
|
|
(setq new-list (cons (int-to-string (car l)) new-list)))
|
|
((equal (car l) ""))
|
|
((stringp (car l)) (setq new-list (cons (car l) new-list)))
|
|
((listp (car l))
|
|
(setq new-list (nconc (mh-list-to-string-1 (car l))
|
|
new-list)))
|
|
(t (error "Bad element in mh-list-to-string: %s" (car l))))
|
|
(setq l (cdr l)))
|
|
new-list))
|
|
|
|
(provide 'mh-utils)
|
|
|
|
(and (not noninteractive)
|
|
mh-auto-folder-collect
|
|
(mh-make-folder-list-background))
|
|
|
|
;;; mh-utils.el ends here
|