;;; man.el --- browse UNIX manual pages
-;; Copyright (C) 1993, 1994, 1996, 1997 Free Software Foundation, Inc.
+;; Copyright (C) 1993, 1994, 1996, 1997, 2001 Free Software Foundation, Inc.
-;; Author: Barry A. Warsaw <bwarsaw@cen.com>
+;; Author: Barry A. Warsaw <bwarsaw@cen.com>
;; Maintainer: FSF
-;; Keywords: help
-;; Adapted-By: ESR, pot
+;; Keywords: help
+;; Adapted-By: ESR, pot
;; This file is part of GNU Emacs.
;; footer). A different algorithm should be used. It is easy to
;; compute how many blank lines there are before and after the page
;; headers, and after the page footer. But it is possible to compute
-;; the number of blank lines before the page footer by euristhics
+;; the number of blank lines before the page footer by heuristics
;; only. Is it worth doing?
;; - Allow a user option to mean that all the manpages should go in
;; the same buffer, where they can be browsed with M-n and M-p.
(defvar Man-awk-command "awk"
"Command used for processing awk scripts.")
-(defvar Man-mode-line-format
- '("-"
- mode-line-mule-info
- mode-line-modified
- mode-line-frame-identification
- mode-line-buffer-identification " "
- global-mode-string
- " " Man-page-mode-string
- " %[(" mode-name mode-line-process minor-mode-alist "%n)%]--"
- (line-number-mode "L%l--")
- (column-number-mode "C%c--")
- (-3 . "%p") "-%-")
- "Mode line format for manual mode buffer.")
-
(defvar Man-mode-map nil
"Keymap for Man mode.")
(defvar Man-reference-regexp
(concat "\\(" Man-name-regexp "\\)(\\(" Man-section-regexp "\\))")
+ "Regular expression describing a reference to another manpage.")
+
+;; This includes the section as an optional part to catch hyphenated
+;; refernces to manpages.
+(defvar Man-hyphenated-reference-regexp
+ (concat "\\(" Man-name-regexp "\\)\\((\\(" Man-section-regexp "\\))\\)?")
"Regular expression describing a reference in the SEE ALSO section.")
(defvar Man-switches ""
- "Switches passed to the man command, as a single string.")
+ "Switches passed to the man command, as a single string.
+
+If you want to be able to see all the manpages for a subject you type,
+make -a one of the switches, if your `man' program supports it.")
(defvar Man-specified-section-option
(if (string-match "-solaris[0-9.]*$" system-configuration)
(define-key Man-mode-map "q" 'Man-quit)
(define-key Man-mode-map "m" 'man)
(define-key Man-mode-map "\r" 'man-follow)
+ (define-key Man-mode-map [mouse-2] 'man-follow-mouse)
(define-key Man-mode-map "?" 'describe-mode)
)
)))
)
-(defsubst Man-match-substring (&optional n string)
- "Return the substring matched by the last search.
-Optional arg N means return the substring matched by the Nth paren
-grouping. Optional second arg STRING means return a substring from
-that string instead of from the current buffer."
- (if (null n) (setq n 0))
- (if string
- (substring string (match-beginning n) (match-end n))
- (buffer-substring (match-beginning n) (match-end n))))
-
(defsubst Man-make-page-mode-string ()
"Formats part of the mode line for Man mode."
(format "%s page %d of %d"
(cond
;; "chmod(2V)" case ?
((string-match (concat "^" Man-reference-regexp "$") ref)
- (setq name (Man-match-substring 1 ref)
- section (Man-match-substring 2 ref)))
+ (setq name (match-string 1 ref)
+ section (match-string 2 ref)))
;; "2v chmod" case ?
((string-match (concat "^\\(" Man-section-regexp
"\\) +\\(" Man-name-regexp "\\)$") ref)
- (setq name (Man-match-substring 2 ref)
- section (Man-match-substring 1 ref))))
+ (setq name (match-string 2 ref)
+ section (match-string 1 ref))))
(if (string= name "")
ref ; Return the reference as is
(if Man-downcase-section-letters-flag
(save-excursion
;; Default man entry title is any word the cursor is on, or if
;; cursor not on a word, then nearest preceding word.
- (setq word (current-word))
+ (skip-chars-backward "-a-zA-Z0-9._+:")
+ (let ((start (point)))
+ (skip-chars-forward "-a-zA-Z0-9._+:")
+ (setq word (buffer-substring start (point))))
(if (string-match "[._]+$" word)
(setq word (substring word 0 (match-beginning 0))))
;; If looking at something like ioctl(2) or brc(1M), include the
word
(if (looking-at
(concat "[ \t]*([ \t]*\\(" Man-section-regexp "\\)[ \t]*)"))
- (format "(%s)" (Man-match-substring 1))
+ (format "(%s)" (match-string 1))
"")))))
\f
If a buffer already exists for this man page, it will display immediately.
To specify a man page from a certain section, type SUBJECT(SECTION) or
-SECTION SUBJECT when prompted for a manual entry."
+SECTION SUBJECT when prompted for a manual entry. To see manpages from
+all sections related to a subject, put something appropriate into the
+`Man-switches' variable, which see."
(interactive
(list (let* ((default-entry (Man-default-man-entry))
(input (read-string
(format "Manual entry%s: "
(if (string= default-entry "")
""
- (format " (default %s)" default-entry))))))
+ (format " (default %s)" default-entry)))
+ nil nil default-entry)))
(if (string= input "")
- (if (string= default-entry "")
- (error "No man args given")
- default-entry)
+ (error "No man args given")
input))))
;; Possibly translate the "subject(section)" syntax into the
(error "No item under point")
(man man-args)))
+(defun man-follow-mouse (e)
+ "Get a Un*x manual page of the item under the mouse and put it in a buffer."
+ (interactive "e")
+ (save-excursion
+ (mouse-set-point e)
+ (call-interactively 'man-follow)))
+
(defun Man-getpage-in-background (topic)
"Use TOPIC to build and fire off the manpage and cleaning command."
(let* ((man-args topic)
(default-directory "/"))
;; Prevent any attempt to use display terminal fanciness.
(setenv "TERM" "dumb")
+ ;; In Debian Woody, at least, we get overlong lines under X
+ ;; unless COLUMNS or MANWIDTH is set. This isn't a problem on
+ ;; a tty. man(1) says:
+ ;; MANWIDTH
+ ;; If $MANWIDTH is set, its value is used as the line
+ ;; length for which manual pages should be formatted.
+ ;; If it is not set, manual pages will be formatted
+ ;; with a line length appropriate to the current ter-
+ ;; minal (using an ioctl(2) if available, the value of
+ ;; $COLUMNS, or falling back to 80 characters if nei-
+ ;; ther is available).
+ (if window-system
+ (unless (or (getenv "MANWIDTH") (getenv "COLUMNS"))
+ ;; This isn't strictly correct, since we don't know how
+ ;; the page will actually be displayed, but it seems
+ ;; reasonable.
+ (setenv "COLUMNS" (number-to-string (frame-width)))))
(if (fboundp 'start-process)
(set-process-sentinel
(start-process manual-program buffer "sh" "-c"
(format (Man-build-man-command) man-args))
'Man-bgproc-sentinel)
- (progn
+ (let ((process-environment
+ (cons "GROFF_NO_SGR=1" process-environment)))
+
(let ((exit-status
(call-process shell-file-name nil (list buffer nil) nil "-c"
(format (Man-build-man-command) man-args)))
)))
(defun Man-softhyphen-to-minus ()
- ;; \255 is some kind of dash in Latin-N. Versions of Debian man, at
+ ;; \255 is SOFT HYPHEN in Latin-N. Versions of Debian man, at
;; least, emit it even when not in a Latin-N locale.
(unless (eq t (compare-strings "latin-" 0 nil
current-language-environment 0 6 t))
(while (re-search-forward "[-|]\\(\b[-|]\\)+" nil t)
(replace-match "+")
(put-text-property (1- (point)) (point) 'face 'bold))
+ (goto-char (point-min))
+ ;; Try to recognize common forms of cross references.
+ (while (re-search-forward "\\w+([0-9].?)" nil t)
+ (put-text-property (match-beginning 0) (match-end 0)
+ 'mouse-face 'highlight))
(Man-softhyphen-to-minus)
(message "%s man page made up" Man-arguments))
`Man-circular-pages-flag' Treat multiple manpage list as circular.
`Man-section-translations-alist' List of section numbers and their Un*x equiv.
`Man-filter-list' Background manpage filter command.
-`Man-mode-line-format' Mode line format for Man mode buffers.
`Man-mode-map' Keymap bindings for Man mode buffers.
`Man-mode-hook' Normal hook run on entry to Man mode.
`Man-section-regexp' Regexp describing manpage section letters.
(setq major-mode 'Man-mode
mode-name "Man"
buffer-auto-save-file-name nil
- mode-line-format Man-mode-line-format
+ mode-line-buffer-identification
+ (list (default-value 'mode-line-buffer-identification)
+ " {" 'Man-page-mode-string "}")
truncate-lines t
buffer-read-only t)
(buffer-disable-undo (current-buffer))
(goto-char (point-min))
(let ((case-fold-search nil))
(while (re-search-forward Man-heading-regexp (point-max) t)
- (aput 'Man-sections-alist (Man-match-substring 1))
+ (aput 'Man-sections-alist (match-string 1))
(forward-line 1))))
(defsubst Man-build-references-alist ()
(back-to-indentation)
(while (and (not (eobp)) (/= (point) runningpoint))
(setq runningpoint (point))
- (if (re-search-forward Man-reference-regexp end t)
- (let* ((word (Man-match-substring 0))
+ (if (re-search-forward Man-hyphenated-reference-regexp end t)
+ (let* ((word (match-string 0))
(len (1- (length word))))
(if hyphenated
(setq word (concat hyphenated word)
- hyphenated nil))
+ hyphenated nil
+ ;; Update len, in case a reference spans
+ ;; more than two lines (paranoia).
+ len (1- (length word))))
(if (= (aref word len) ?-)
- (setq hyphenated (substring word 0 len))
- (aput 'Man-refpages-alist word))))
- (skip-chars-forward " \t\n,")))))))
+ (setq hyphenated (substring word 0 len)))
+ (if (string-match Man-reference-regexp word)
+ (aput 'Man-refpages-alist word))))
+ (skip-chars-forward " \t\n,"))))))
+ (setq Man-refpages-alist (nreverse Man-refpages-alist)))
(defun Man-build-page-list ()
"Build the list of separate manpages in the buffer."
(while (not (eobp))
(setq header
(if (looking-at Man-page-header-regexp)
- (Man-match-substring 1)
+ (match-string 1)
nil))
;; Go past both the current and the next Man-first-heading-regexp
(if (re-search-forward Man-first-heading-regexp nil 'move 2)
(Man-find-section (aheadsym Man-sections-alist)))
(defun Man-goto-see-also-section ()
- "Move point the the \"SEE ALSO\" section.
+ "Move point to the \"SEE ALSO\" section.
Actually the section moved to is described by `Man-see-also-regexp'."
(interactive)
(if (not (Man-find-section Man-see-also-regexp))
(error (concat "No " Man-see-also-regexp
" section found in the current manpage"))))
+(defun Man-possibly-hyphenated-word ()
+ "Return a possibly hyphenated word at point.
+If the word starts at the first non-whitespace column, and the
+previous line ends with a hyphen, return the last word on the previous
+line instead. Thus, if a reference to \"tcgetpgrp(3V)\" is hyphenated
+as \"tcgetp-grp(3V)\", and point is at \"grp(3V)\", we return
+\"tcgetp-\" instead of \"grp\"."
+ (save-excursion
+ (skip-syntax-backward "w()")
+ (skip-chars-forward " \t")
+ (let ((beg (point))
+ (word (current-word)))
+ (when (eq beg (save-excursion
+ (back-to-indentation)
+ (point)))
+ (end-of-line 0)
+ (if (eq (char-before) ?-)
+ (setq word (current-word))))
+ word)))
+
(defun Man-follow-manual-reference (reference)
"Get one of the manpages referred to in the \"SEE ALSO\" section.
Specify which REFERENCE to use; default is based on word at point."
(if (not Man-refpages-alist)
(error "There are no references in the current man page")
(list (let* ((default (or
- (car (all-completions
- (save-excursion
- (skip-syntax-backward "w()")
- (skip-chars-forward " \t")
- (let ((word (current-word)))
- ;; strip a trailing '-':
- (if (string-match "-$" word)
- (substring word 0
- (match-beginning 0))
- word)))
- Man-refpages-alist))
- (aheadsym Man-refpages-alist)))
+ (car (all-completions
+ (let ((word (Man-possibly-hyphenated-word)))
+ ;; strip a trailing '-':
+ (if (string-match "-$" word)
+ (substring word 0
+ (match-beginning 0))
+ word))
+ Man-refpages-alist))
+ (aheadsym Man-refpages-alist)))
chosen
(prompt (concat "Refer to: (default " default ") ")))
(setq chosen (completing-read prompt Man-refpages-alist nil t))