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1 ;;; man.el --- browse UNIX manual pages
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2 ;; Keywords: help
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3
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4 ;; Copyright (C) 1985, 1993, 1994, 1996 Free Software Foundation, Inc.
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5 ;;
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6 ;; This file is part of XEmacs.
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7
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8 ;; XEmacs is free software; you can redistribute it and/or modify it
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9 ;; under the terms of the GNU General Public License as published by
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10 ;; the Free Software Foundation; either version 2, or (at your option)
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11 ;; any later version.
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12
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13 ;; XEmacs is distributed in the hope that it will be useful, but
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14 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 ;; General Public License for more details.
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17
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18 ;; You should have received a copy of the GNU General Public License
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19 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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20 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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21
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22 ;; This file defines "manual-entry", and the remaining definitions all
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23 ;; begin with "Manual-". This makes the autocompletion on "M-x man" work.
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24 ;;
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25 ;; Eviscerated 26-Jun-96 by Jamie Zawinski <jwz@netscape.com>.
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26 ;; All that stuff about looking at $MANPATH and building up lists of
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27 ;; directories was bullshit. Now we just invoke "man" and format the
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28 ;; output, end of story.
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29 ;;
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30 ;; [ older changelog entries removed, since they're all about code that
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31 ;; I've deleted. ]
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32
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33 (defvar Manual-program "man" "\
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34 *Name of the program to invoke in order to format the source man pages.")
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35
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36 (defvar Manual-buffer-view-mode t "\
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37 *Whether manual buffers should be placed in view-mode.
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38 nil means leave the buffer in fundamental-mode in another window.
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39 t means use `view-buffer' to display the man page in the current window.
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40 Any other value means use `view-buffer-other-window'.")
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41
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42 (defvar Manual-mode-hook nil
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43 "Function or functions run on entry to Manual-mode.")
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44
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45 (defvar Manual-page-history nil "\
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46 A list of names of previously visited man page buffers.")
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47
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48
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49 ;; New variables.
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50
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51 (make-face 'man-italic)
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52 (or (face-differs-from-default-p 'man-italic)
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53 (copy-face 'italic 'man-italic))
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54 ;; XEmacs (from Darrell Kindred): underlining is annoying due to
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55 ;; large blank spaces in this face.
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56 ;; (or (face-differs-from-default-p 'man-italic)
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57 ;; (set-face-underline-p 'man-italic t))
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58
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59 (make-face 'man-bold)
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60 (or (face-differs-from-default-p 'man-bold)
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61 (copy-face 'bold 'man-bold))
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62 (or (face-differs-from-default-p 'man-bold)
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63 (copy-face 'man-italic 'man-bold))
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64
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65 (make-face 'man-heading)
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66 (or (face-differs-from-default-p 'man-heading)
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67 (copy-face 'man-bold 'man-heading))
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68
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69 (make-face 'man-xref)
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70 (or (face-differs-from-default-p 'man-xref)
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71 (set-face-underline-p 'man-xref t))
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72
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73 (defvar Manual-mode-map
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74 (let ((m (make-sparse-keymap)))
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75 (set-keymap-name m 'Manual-mode-map)
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76 (define-key m "l" 'Manual-last-page)
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77 (define-key m 'button2 'Manual-follow-xref)
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78 (define-key m 'button3 'Manual-popup-menu)
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79 m))
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80
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81 ;;;###autoload
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82 (defun manual-entry (topic &optional arg silent)
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83 "Display the Unix manual entry (or entries) for TOPIC."
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84 (interactive
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85 (list (let* ((fmh "-A-Za-z0-9_.")
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86 (default (save-excursion
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87 (buffer-substring
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88 (progn
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89 (re-search-backward "\\sw" nil t)
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90 (skip-chars-backward fmh) (point))
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91 (progn (skip-chars-forward fmh) (point)))))
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92 (thing (read-string
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93 (if (equal default "") "Manual entry: "
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94 (concat "Manual entry: (default " default ") ")))))
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95 (if (equal thing "") default thing))
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96 (prefix-numeric-value current-prefix-arg)))
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97 ;;(interactive "sManual entry (topic): \np")
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98 (or arg (setq arg 1))
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99 (let (section apropos-mode)
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100 (let ((case-fold-search nil))
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101 (if (and (null section)
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102 (string-match "\\`[ \t]*\\([^( \t]+\\)[ \t]*(\\(.+\\))[ \t]*\\'"
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103 topic))
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104 (setq section (substring topic (match-beginning 2)
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105 (match-end 2))
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106 topic (substring topic (match-beginning 1)
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107 (match-end 1)))
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108 (if (string-match "\\`[ \t]*-k[ \t]+\\([^ \t]+\\)\\'" topic)
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109 (setq section "-k"
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110 topic (substring topic (match-beginning 1))))))
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111
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112 ;; jwz: turn section "3x11" and "3n" into "3".
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113 (if (and section (string-match "\\`\\([0-9]+\\)[^0-9]" section))
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114 (setq section (substring section 0 (match-end 1))))
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115 (if (equal section "-k")
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116 (setq apropos-mode t))
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117
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118 (let ((bufname (cond (apropos-mode
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119 (concat "*man apropos " topic "*"))
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120 (t
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121 (concat "*man " topic
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122 (if section (concat "." section) "")
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123 "*"))))
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124 (temp-buffer-show-function
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125 (cond ((eq 't Manual-buffer-view-mode)
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126 'view-buffer)
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127 ((eq 'nil Manual-buffer-view-mode)
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128 temp-buffer-show-function)
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129 (t
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130 'view-buffer-other-window))))
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131
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132 (cond ((get-buffer bufname)
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133 ;; reselect an old man page buffer if it exists already.
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134 (save-excursion
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135 (set-buffer (get-buffer bufname))
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136 (Manual-mode))
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137 (if temp-buffer-show-function
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138 (funcall temp-buffer-show-function (get-buffer bufname))
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139 (display-buffer bufname)))
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140 (t
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141 (with-output-to-temp-buffer bufname
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142 (buffer-disable-undo standard-output)
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143 (save-excursion
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144 (set-buffer standard-output)
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145 (setq buffer-read-only nil)
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146 (erase-buffer)
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147
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148 (let ((args (list topic))
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149 args-string)
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150 (if section
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151 (setq args
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152 (if (eq system-type 'usg-unix-v)
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153 (cons "-s" (cons section args))
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154 (cons section args))))
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155 (setq args-string
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156 (mapconcat 'identity (cons Manual-program args) " "))
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157 (if (string-match "\\`\\([^ \t/]*/\\)+" args-string)
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158 (setq args-string
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159 (substring args-string (match-end 0))))
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160
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161 (message "%s (running...)" args-string)
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162 (apply 'call-process Manual-program nil t nil args)
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163
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164 (if (< (buffer-size) 200)
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165 (progn
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166 (goto-char (point-min))
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167 (error (buffer-substring (point)
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168 (progn (end-of-line)
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169 (point))))))
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170
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171 (message "%s (cleaning...)" args-string)
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172 (Manual-nuke-nroff-bs apropos-mode)
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173 (message "%s (done.)" args-string)
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174 )
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175
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176 (set-buffer-modified-p nil)
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177 (Manual-mode)
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178 ))))
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179 (setq Manual-page-history
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180 (cons (buffer-name)
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181 (delete (buffer-name) Manual-page-history)))))
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182 (message nil)
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183 t)
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184
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185 (defun Manual-mode ()
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186 (kill-all-local-variables)
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187 (setq buffer-read-only t)
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188 (use-local-map Manual-mode-map)
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189 (setq major-mode 'Manual-mode
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190 mode-name "Manual")
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191 ;; man pages with long lines are buggy!
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192 ;; This looks slightly better if they only
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193 ;; overran by a couple of chars.
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194 (setq truncate-lines t)
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195 ;; turn off horizontal scrollbars in this buffer
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196 (set-specifier scrollbar-height (cons (current-buffer) 0))
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197 (run-hooks 'Manual-mode-hook))
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198
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199 (defun Manual-last-page ()
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200 (interactive)
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201 (while (or (not (get-buffer (car (or Manual-page-history
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202 (error "No more history.")))))
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203 (eq (get-buffer (car Manual-page-history)) (current-buffer)))
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204 (setq Manual-page-history (cdr Manual-page-history)))
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205 (switch-to-buffer (car Manual-page-history)))
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206
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207
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208 (defmacro Manual-delete-char (n)
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209 ;; in v19, delete-char is compiled as a function call, but delete-region
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210 ;; is byte-coded, so it's much faster. (We were spending 40% of our time
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211 ;; in delete-char alone.)
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212 (list 'delete-region '(point) (list '+ '(point) n)))
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213
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214 ;; Hint: BS stands form more things than "back space"
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215 (defun Manual-nuke-nroff-bs (&optional apropos-mode)
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216 (interactive "*")
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217 ;;
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218 ;; turn underlining into italics
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219 ;;
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220 (goto-char (point-min))
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221 (while (search-forward "_\b" nil t)
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222 ;; searching for underscore-backspace and then comparing the following
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223 ;; chars until the sequence ends turns out to be much faster than searching
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224 ;; for a regexp which matches the whole sequence.
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225 (let ((s (match-beginning 0)))
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226 (goto-char s)
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227 (while (and (= (following-char) ?_)
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228 (= (char-after (1+ (point))) ?\b))
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229 (Manual-delete-char 2)
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230 (forward-char 1))
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231 (set-extent-face (make-extent s (point)) 'man-italic)))
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232 ;;
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233 ;; turn overstriking into bold
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234 ;;
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235 (goto-char (point-min))
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236 (while (re-search-forward "\\([^\n]\\)\\(\b\\1\\)" nil t)
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237 ;; Surprisingly, searching for the above regexp is faster than searching
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238 ;; for a backspace and then comparing the preceding and following chars,
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239 ;; I presume because there are many false matches, meaning more funcalls
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240 ;; to re-search-forward.
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241 (let ((s (match-beginning 0)))
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242 (goto-char s)
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243 ;; Some systems (SGI) overstrike multiple times, eg, "M\bM\bM\bM".
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244 (while (looking-at "\\([^\n]\\)\\(\b\\1\\)+")
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245 (delete-region (+ (point) 1) (match-end 0))
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246 (forward-char 1))
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247 (set-extent-face (make-extent s (point)) 'man-bold)))
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248 ;;
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249 ;; hack bullets: o^H+ --> +
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250 (goto-char (point-min))
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251 (while (search-forward "\b" nil t)
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252 (Manual-delete-char -2))
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253
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254 (if (> (buffer-size) 100) ; minor kludge
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255 (Manual-nuke-nroff-bs-footers))
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256 ;;
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257 ;; turn subsection header lines into bold
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258 ;;
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259 (goto-char (point-min))
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260 (if apropos-mode
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261 (while (re-search-forward "[a-zA-Z0-9] ([0-9]" nil t)
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262 (forward-char -2)
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263 (delete-backward-char 1))
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264
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265 ;; (while (re-search-forward "^[^ \t\n]" nil t)
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266 ;; (set-extent-face (make-extent (match-beginning 0)
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267 ;; (progn (end-of-line) (point)))
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268 ;; 'man-heading))
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269
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270 ;; boldface the first line
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271 (if (looking-at "[^ \t\n].*$")
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272 (set-extent-face (make-extent (match-beginning 0) (match-end 0))
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273 'man-bold))
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274
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275 ;; boldface subsequent title lines
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276 ;; Regexp to match section headers changed to match a non-indented
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277 ;; line preceded by a blank line and followed by an indented line.
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278 ;; This seems to work ok for manual pages but gives better results
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279 ;; with other nroff'd files
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280 (while (re-search-forward "\n\n\\([^ \t\n].*\\)\n[ \t]+[^ \t\n]" nil t)
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281 (goto-char (match-end 1))
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282 (set-extent-face (make-extent (match-beginning 1) (match-end 1))
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283 'man-heading)
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284 (forward-line 1))
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285 )
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286
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287 ;; Zap ESC7, ESC8, and ESC9
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288 ;; This is for Sun man pages like "man 1 csh"
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289 (goto-char (point-min))
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290 (while (re-search-forward "\e[789]" nil t)
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291 (replace-match ""))
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292
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293 ;; Nuke blanks lines at start.
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294 ;; (goto-char (point-min))
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295 ;; (skip-chars-forward "\n")
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296 ;; (delete-region (point-min) (point))
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297
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298 (Manual-mouseify-xrefs)
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299 )
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300
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301 (fset 'nuke-nroff-bs 'Manual-nuke-nroff-bs) ; use old name
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302
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303
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304 (defun Manual-nuke-nroff-bs-footers ()
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305 ;; Nuke headers and footers.
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306 ;;
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307 ;; nroff assumes pages are 66 lines high. We assume that, and that the
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308 ;; first and last line on each page is expendible. There is no way to
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309 ;; tell the difference between a page break in the middle of a paragraph
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310 ;; and a page break between paragraphs (the amount of extra whitespace
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311 ;; that nroff inserts is the same in both cases) so this might strip out
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312 ;; a blank line were one should remain. I think that's better than
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313 ;; leaving in a blank line where there shouldn't be one. (Need I say
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314 ;; it: FMH.)
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315 ;;
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316 ;; Note that if nroff spits out error messages, pages will be more than
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317 ;; 66 lines high, and we'll lose badly. That's ok because standard
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318 ;; nroff doesn't do any diagnostics, and the "gnroff" wrapper for groff
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319 ;; turns off error messages for compatibility. (At least, it's supposed
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320 ;; to.)
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321 ;;
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322 (goto-char (point-min))
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323 ;; first lose the status output
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324 (let ((case-fold-search t))
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325 (if (and (not (looking-at "[^\n]*warning"))
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326 (looking-at "Reformatting.*\n"))
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327 (delete-region (match-beginning 0) (match-end 0))))
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328
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329 ;; kludge around a groff bug where it won't keep quiet about some
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330 ;; warnings even with -Wall or -Ww.
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331 (cond ((looking-at "grotty:")
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332 (while (looking-at "grotty:")
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333 (delete-region (point) (progn (forward-line 1) (point))))
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334 (if (looking-at " *done\n")
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335 (delete-region (point) (match-end 0)))))
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336
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337 (let ((pages '())
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338 p)
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339 ;; collect the page boundary markers before we start deleting, to make
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340 ;; it easier to strip things out without changing the page sizes.
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341 (while (not (eobp))
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342 (forward-line 66)
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343 (setq pages (cons (point-marker) pages)))
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344 (setq pages (nreverse pages))
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345 (while pages
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346 (goto-char (car pages))
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347 (set-marker (car pages) nil)
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348 ;;
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349 ;; The lines are: 3 blank; footer; 6 blank; header; 3 blank.
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350 ;; We're in between the previous footer and the following header,
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351 ;;
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352 ;; First lose 3 blank lines, the header, and then 3 more.
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353 ;;
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354 (setq p (point))
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355 (skip-chars-forward "\n")
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356 (delete-region p (point))
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357 (and (looking-at "[^\n]+\n\n?\n?\n?")
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358 (delete-region (match-beginning 0) (match-end 0)))
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359 ;;
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360 ;; Next lose the footer, and the 3 blank lines after, and before it.
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361 ;; But don't lose the last footer of the manual entry; that contains
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362 ;; the "last change" date, so it's not completely uninteresting.
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363 ;; (Actually lose all blank lines before it; sh(1) needs this.)
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364 ;;
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365 (skip-chars-backward "\n")
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366 (beginning-of-line)
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367 (if (null (cdr pages))
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368 nil
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369 (and (looking-at "[^\n]+\n\n?\n?\n?")
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370 (delete-region (match-beginning 0) (match-end 0))))
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371 (setq p (point))
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372 (skip-chars-backward "\n")
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373 (if (> (- p (point)) 4)
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374 (delete-region (+ 2 (point)) p)
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375 (delete-region (1+ (point)) p))
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376 ; (and (looking-at "\n\n?\n?")
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377 ; (delete-region (match-beginning 0) (match-end 0)))
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378
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379 (setq pages (cdr pages)))
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380 ;;
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381 ;; Now nuke the extra blank lines at the beginning and end.
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382 (goto-char (point-min))
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383 (if (looking-at "\n+")
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384 (delete-region (match-beginning 0) (match-end 0)))
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385 (forward-line 1)
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386 (if (looking-at "\n\n+")
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387 (delete-region (1+ (match-beginning 0)) (match-end 0)))
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388 (goto-char (point-max))
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389 (skip-chars-backward "\n")
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390 (delete-region (point) (point-max))
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391 (beginning-of-line)
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392 (forward-char -1)
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393 (setq p (point))
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394 (skip-chars-backward "\n")
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395 (if (= ?\n (following-char)) (forward-char 1))
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396 (if (> (point) (1+ p))
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397 (delete-region (point) p))
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398 ))
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399
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400 (defun Manual-mouseify-xrefs ()
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401 (goto-char (point-min))
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402 (forward-line 1)
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403 (let ((case-fold-search nil)
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404 s e name extent)
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405 ;; possibly it would be faster to rewrite this expression to search for
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406 ;; a less common sequence first (like "([0-9]") and then back up to see
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407 ;; if it's really a match. This function is 15% of the total time, 13%
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408 ;; of which is this call to re-search-forward.
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409 (while (re-search-forward "[a-zA-Z_][-a-zA-Z0-9_.]*([0-9][a-zA-Z0-9]*)"
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410 nil t)
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411 (setq s (match-beginning 0)
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412 e (match-end 0)
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413 name (buffer-substring s e))
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414 (goto-char s)
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415 (skip-chars-backward " \t")
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416 (if (and (bolp)
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417 (progn (backward-char 1) (= (preceding-char) ?-)))
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418 (progn
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419 (setq s (point))
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420 (skip-chars-backward "-a-zA-Z0-9_.")
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421 (setq name (concat (buffer-substring (point) (1- s)) name))
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422 (setq s (point))))
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423 ;; if there are upper case letters in the section, downcase them.
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424 (if (string-match "(.*[A-Z]+.*)$" name)
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425 (setq name (concat (substring name 0 (match-beginning 0))
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426 (downcase (substring name (match-beginning 0))))))
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|
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427 ;; (setq already-fontified (extent-at s))
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428 (setq extent (make-extent s e))
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429 (set-extent-property extent 'man (list 'Manual-follow-xref name))
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430 (set-extent-property extent 'highlight t)
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|
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431 ;; (if (not already-fontified)...
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|
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432 (set-extent-face extent 'man-xref)
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|
|
433 (goto-char e))))
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|
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434
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|
|
435 (defun Manual-follow-xref (&optional name-or-event)
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436 "Invoke `manual-entry' on the cross-reference under the mouse.
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|
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437 When invoked noninteractively, the arg may be an xref string to parse instead."
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|
|
438 (interactive "e")
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|
|
439 (if (eventp name-or-event)
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|
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440 (let* ((p (event-point name-or-event))
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|
|
441 (extent (and p (extent-at p
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|
|
442 (event-buffer name-or-event)
|
|
|
443 'highlight)))
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|
|
444 (data (and extent (extent-property extent 'man))))
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|
|
445 (if (eq (car-safe data) 'Manual-follow-xref)
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|
|
446 (eval data)
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|
|
447 (error "no manual cross-reference there.")))
|
|
|
448 (or (manual-entry name-or-event)
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|
|
449 ;; If that didn't work, maybe it's in a different section than the
|
|
|
450 ;; man page writer expected. For example, man pages tend assume
|
|
|
451 ;; that all user programs are in section 1, but X tends to generate
|
|
|
452 ;; makefiles that put things in section "n" instead...
|
|
|
453 (and (string-match "[ \t]*([^)]+)\\'" name-or-event)
|
|
|
454 (progn
|
|
|
455 (message "No entries found for %s; checking other sections..."
|
|
|
456 name-or-event)
|
|
|
457 (manual-entry
|
|
|
458 (substring name-or-event 0 (match-beginning 0))
|
|
|
459 nil t))))))
|
|
|
460
|
|
|
461 (defun Manual-popup-menu (&optional event)
|
|
|
462 "Pops up a menu of cross-references in this manual page.
|
|
|
463 If there is a cross-reference under the mouse button which invoked this
|
|
|
464 command, it will be the first item on the menu. Otherwise, they are
|
|
|
465 on the menu in the order in which they appear in the buffer."
|
|
|
466 (interactive "e")
|
|
|
467 (let ((buffer (current-buffer))
|
|
|
468 (sep "---")
|
|
|
469 (prefix "Show Manual Page for ")
|
|
|
470 xref items)
|
|
|
471 (cond (event
|
|
|
472 (setq buffer (event-buffer event))
|
|
|
473 (let* ((p (event-point event))
|
|
|
474 (extent (and p (extent-at p buffer 'highlight)))
|
|
|
475 (data (and extent (extent-property extent 'man))))
|
|
|
476 (if (eq (car-safe data) 'Manual-follow-xref)
|
|
|
477 (setq xref (nth 1 data))))))
|
|
|
478 (if xref (setq items (list sep xref)))
|
|
|
479 (map-extents #'(lambda (extent ignore)
|
|
|
480 (let ((data (extent-property extent 'man)))
|
|
|
481 (if (and (eq (car-safe data) 'Manual-follow-xref)
|
|
|
482 (not (member (nth 1 data) items)))
|
|
|
483 (setq items (cons (nth 1 data) items)))
|
|
|
484 nil))
|
|
|
485 buffer)
|
|
|
486 (if (eq sep (car items)) (setq items (cdr items)))
|
|
|
487 (let ((popup-menu-titles nil))
|
|
|
488 (popup-menu
|
|
|
489 (cons "Manual Entry"
|
|
|
490 (mapcar #'(lambda (item)
|
|
|
491 (if (eq item sep)
|
|
|
492 item
|
|
|
493 (vector (concat prefix item)
|
|
|
494 (list 'Manual-follow-xref item) t)))
|
|
|
495 (nreverse items)))))))
|
|
|
496
|
|
|
497 (defun pager-cleanup-hook ()
|
|
|
498 "cleanup man page if called via $PAGER"
|
|
|
499 (let ((buf-name (or buffer-file-name (buffer-name))))
|
|
|
500 (if (or (string-match "^/tmp/man[0-9]+" buf-name)
|
|
|
501 (string-match ".*/man/\\(man\\|cat\\)[1-9a-z]/" buf-name))
|
|
|
502 (let (buffer manpage)
|
|
|
503 (require 'man)
|
|
|
504 (goto-char (point-min))
|
|
|
505 (setq buffer-read-only nil)
|
|
|
506 (Manual-nuke-nroff-bs)
|
|
|
507 (goto-char (point-min))
|
|
|
508 (if (re-search-forward "[^ \t]")
|
|
|
509 (goto-char (- (point) 1)))
|
|
|
510 (if (looking-at "\\([a-zA-Z0-9]+\\)[ \t]*(")
|
|
|
511 (setq manpage (buffer-substring (match-beginning 1)
|
|
|
512 (match-end 1)))
|
|
|
513 (setq manpage "???"))
|
|
|
514 (setq buffer
|
|
|
515 (rename-buffer
|
|
|
516 (generate-new-buffer-name (concat "*man " manpage "*"))))
|
|
|
517 (setq buffer-file-name nil)
|
|
|
518 (goto-char (point-min))
|
|
|
519 (insert (format "%s\n" buf-name))
|
|
|
520 (goto-char (point-min))
|
|
|
521 (buffer-disable-undo buffer)
|
|
|
522 (set-buffer-modified-p nil)
|
|
|
523 (Manual-mode)
|
|
|
524 ))))
|
|
|
525
|
|
|
526 (add-hook 'server-visit-hook 'pager-cleanup-hook)
|
|
|
527 (provide 'man)
|
|
|
528
|
|
|
529 ;;; man.el ends here
|
