/usr/share/emacs/site-lisp/mew/mew-message.el is in mew-beta 7.0.50~6.5+0.20140128-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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;; Author: Kazu Yamamoto <Kazu@Mew.org>
;; Created: Oct 2, 1996
;;; Code:
(require 'mew)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Message info
;;;
(defvar mew-minfo-list '("summary" "eom" "veil-to" "veil-cc" "reob"))
(mew-blinfo-defun 'mew-minfo mew-minfo-list)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Message mode
;;;
(defun mew-message-mode ()
"A major mode for display a message.
\\{mew-message-mode-map}"
(interactive)
(setq major-mode 'mew-message-mode)
(setq mode-name mew-mode-name-message)
(setq mode-line-buffer-identification (mew-mode-line-id))
(use-local-map mew-message-mode-map)
(setq buffer-read-only t)
(make-local-variable 'page-delimiter)
(setq page-delimiter mew-page-delimiter)
(mew-message-setup-decoration)
(mew-message-toolbar-update)
(mew-run-mode-hooks 'mew-message-mode-hook))
(defun mew-message-mode-line (fld message)
(let* ((msg (or message
(mew-current-get-msg (mew-frame-id))))
(status (mew-message-line-status))
(flag (nth status '("N" "W" "L"))))
(when msg
(setq mode-line-process (format " %s %s/%s" flag fld msg)))))
(defun mew-message-next-page (&optional lines)
"Scroll up this message. Return 'nil' if more pages. Otherwise, return 't'."
(interactive)
(if (save-excursion
(goto-char (window-end))
(and (pos-visible-in-window-p) (eobp)))
;; Nothing in this page.
(if (or (null mew-break-pages)
(save-excursion
(goto-char (window-end))
(save-restriction
(widen) (forward-line) (eobp)))) ;; Real end of buffer?
(if mew-summary-show-pause
(prog1
(mew-minfo-get-reob)
(unless (mew-minfo-get-reob)
(message "End of buffer")
(mew-minfo-set-reob t)))
t)
;; Go to the next page.
(mew-message-narrow-to-page 1)
nil)
;; More in this page.
(condition-case nil
(scroll-up lines)
(end-of-buffer
(goto-char (point-max))
(message "End of buffer")))
nil))
(defun mew-message-prev-page (&optional lines)
"Back-scroll this message. Return 'nil' if more pages.
Otherwise, return 't'."
(interactive)
(move-to-window-line 0)
(if (save-excursion
(beginning-of-line)
(and (pos-visible-in-window-p) (bobp)))
;; Nothing in this page.
(if (or (null mew-break-pages)
(save-restriction
(widen) (bobp))) ;; Real beginning of buffer?
t
;; Go to the previous page.
(mew-message-narrow-to-page -1)
nil)
;; More in this page.
(condition-case nil
(scroll-down lines)
(beginning-of-buffer
(goto-char (point-min))
(message "Beginning of buffer")))
nil))
(defun mew-message-narrow-to-page (&optional arg)
(setq arg (if arg (prefix-numeric-value arg) 0))
(save-excursion
(condition-case nil
(forward-page -1) ;; Beginning of the current page.
(beginning-of-buffer ()))
(widen)
(cond
((> arg 0) (forward-page arg))
((< arg 0) (forward-page (1- arg))))
(forward-page)
(let* ((end (point)))
(forward-page -1)
(if (and (eolp) (not (bobp)))
(forward-line))
(narrow-to-region (point) end))))
(defun mew-message-goto-summary ()
"Get back to Summary mode."
(interactive)
(let* ((fld (mew-minfo-get-summary))
(fid (mew-frame-id))
(msg (mew-current-get-msg fid))
(part (mew-current-get-part fid)))
(if (not (get-buffer fld))
(message "No Summary mode for %s" fld)
(if (get-buffer-window fld)
(select-window (get-buffer-window fld))
(mew-summary-switch-to-folder fld))
(cond
((and msg part (mew-decode-syntax-p))
(setq part (concat "^.. +"
(regexp-quote (mapconcat 'number-to-string part "."))
" "))
(goto-char (mew-decode-syntax-begin))
(re-search-forward part (mew-decode-syntax-end) t)
(beginning-of-line)
(mew-summary-display))
(msg
(mew-summary-move-and-display msg))))))
(defun mew-message-reply ()
"Answer to this message. A new draft is prepared in Draft mode.
Mew automatically decides To: and Cc:."
(interactive)
(mew-message-goto-summary)
(call-interactively 'mew-summary-reply))
(defun mew-message-reply-with-citation ()
"Answer to this message. A new draft is prepared in Draft mode.
Mew automatically decides To: and Cc: and cites the body."
(interactive)
(mew-message-goto-summary)
(call-interactively 'mew-summary-reply-with-citation))
(defun mew-message-forward ()
"Forward this message to a third person. A new draft is prepared in
Draft mode and this message is automatically attached."
(interactive)
(mew-message-goto-summary)
(call-interactively 'mew-summary-forward))
(defun mew-message-resend ()
"\\<mew-message-mode-map>
Resend this message with Resent-To:. It is strongly
discouraged to use this command since beginners are always
confused. Please use '\\[mew-message-forward]' instead."
(interactive)
(mew-message-goto-summary)
(call-interactively 'mew-summary-resend))
(defun mew-message-next-msg (&optional arg)
"Display a message or a part below."
(interactive "p")
(let* ((swin (previous-window))
(mbuf (current-buffer)))
(select-window swin) ;; for the next forward-line
(when (mew-summary-or-virtual-p)
(forward-line arg) ;; minus arg results in prev
(mew-summary-display))
;; for window config
(select-window (get-buffer-window mbuf))))
(defun mew-message-prev-msg (&optional arg)
"Display a message or a part above."
(interactive "p")
(mew-message-next-msg (- arg)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; URLs
;;;
(defun mew-message-goto-next-url (&optional arg)
(interactive "P")
(let ((next (if arg
'previous-single-property-change
'next-single-property-change))
pos)
(setq pos (funcall next (point) 'mew-url))
(if pos
(if (not (get-text-property pos 'mew-url))
(setq pos (funcall next pos 'mew-url))))
(when pos
(goto-char pos))))
(defun mew-browse-url-at-mouse (event)
(interactive "e")
(let ((buf (current-buffer)) url)
(mouse-set-point event)
(setq url (or (get-text-property (point) 'mew-url)
(get-text-property (point) 'w3m-href-anchor)))
(if (and url (string-match mew-regex-nonascii url))
(setq url (mew-puny-encode-url url)))
(if url (browse-url url))
(pop-to-buffer buf)))
(defun mew-browse-url-at-point ()
(interactive)
(let (url)
(setq url (or (get-text-property (point) 'mew-url)
(get-text-property (point) 'w3m-href-anchor)))
(if (and url (string-match mew-regex-nonascii url))
(setq url (mew-puny-encode-url url)))
(if url (browse-url url))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; lines
;;;
(defun mew-message-line-status ()
(cond
((not (eq buffer-undo-list t)) 1) ;; wrapped
(truncate-lines 2) ;; long
(t 0))) ;; normal
(defun mew-message-line ()
"Toggle normal lines, wrapped lines and long lines."
(interactive)
(let* ((N 3)
(status (% (1+ (mew-message-line-status)) N)))
(mew-elet
(cond
((= status 0)
(setq truncate-lines nil)
(message "Normal lines"))
((= status 1)
(setq buffer-undo-list nil)
(mew-wrap-lines (if (mew-header-end) (1+ (mew-header-end)) (point-min)) (point-max))
(message "Wrapped lines"))
((= status 2)
(save-excursion
(primitive-undo (length buffer-undo-list) buffer-undo-list))
(buffer-disable-undo)
(setq truncate-lines t)
(message "Long lines")))
(set-window-hscroll (selected-window) 0)
(set-buffer-modified-p nil))))
(defun mew-normal-line ()
(setq truncate-lines nil))
(defcustom mew-wrap-lines-column fill-column
"*Number of fill column to wrap line."
:group 'mew-message
:type 'integer)
(defun mew-wrap-lines (beg end)
(save-restriction
(narrow-to-region beg end)
(save-excursion
(goto-char (point-min))
(let ((adaptive-fill-mode nil)
(winwidth (- (window-width) 2))
(fill-column mew-wrap-lines-column)
width start fill-prefix)
(while (not (eobp))
(setq start (point))
(setq fill-prefix (mew-fill-match-adaptive-prefix))
(end-of-line)
(setq width (current-column))
(forward-line)
(if fill-prefix
(setq fill-column (+ mew-wrap-lines-column (string-width fill-prefix)))
(setq fill-column mew-wrap-lines-column))
(setq fill-column (min fill-column winwidth))
(when (> width fill-column)
(fill-region-as-paragraph start (1- (point)))))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Horizontal Scrolling
;;;
(defun mew-message-scroll-left ()
"Scroll the Message window to the right."
(interactive)
(call-interactively 'scroll-left))
(defun mew-message-scroll-right ()
"Scroll the Message window to the left."
(interactive)
(call-interactively 'scroll-right))
(provide 'mew-message)
;;; Copyright Notice:
;; Copyright (C) 1996-2012 Mew developing team.
;; All rights reserved.
;; Redistribution and use in source and binary forms, with or without
;; modification, are permitted provided that the following conditions
;; are met:
;;
;; 1. Redistributions of source code must retain the above copyright
;; notice, this list of conditions and the following disclaimer.
;; 2. Redistributions in binary form must reproduce the above copyright
;; notice, this list of conditions and the following disclaimer in the
;; documentation and/or other materials provided with the distribution.
;; 3. Neither the name of the team nor the names of its contributors
;; may be used to endorse or promote products derived from this software
;; without specific prior written permission.
;;
;; THIS SOFTWARE IS PROVIDED BY THE TEAM AND CONTRIBUTORS ``AS IS'' AND
;; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
;; PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE TEAM OR CONTRIBUTORS BE
;; LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
;; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
;; SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
;; BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
;; OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
;; IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;; mew-message.el ends here
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