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1 ;;; help.el --- help commands for XEmacs.
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2 ;; Copyright (C) 1985, 1986, 1992, 1993, 1994 Free Software Foundation, Inc.
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3
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4 ;; Maintainer: FSF
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5 ;; Keywords: help, internal
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6
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7 ;; This file is part of XEmacs.
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8
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9 ;; XEmacs is free software; you can redistribute it and/or modify it
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10 ;; under the terms of the GNU General Public License as published by
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11 ;; the Free Software Foundation; either version 2, or (at your option)
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12 ;; any later version.
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13
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14 ;; XEmacs is distributed in the hope that it will be useful, but
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15 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 ;; General Public License for more details.
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18
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19 ;; You should have received a copy of the GNU General Public License
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20 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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21 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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22
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23 ;;; Synched up with: FSF 19.30.
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24
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25 ;;; Commentary:
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26
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27 ;; This code implements XEmacs's on-line help system, the one invoked by
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28 ;;`M-x help-for-help'.
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29
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30 ;;; Code:
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31
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32 ;#### FSFmacs
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33 ;; Get the macro make-help-screen when this is compiled,
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34 ;; or run interpreted, but not when the compiled code is loaded.
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35 ;(eval-when-compile (require 'help-macro))
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36
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37 (defvar help-map (let ((map (make-sparse-keymap)))
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38 (set-keymap-name map 'help-map)
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39 (set-keymap-prompt
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40 map (purecopy (gettext "(Type ? for further options)")))
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41 map)
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42 "Keymap for characters following the Help key.")
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43
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44 ;; global-map definitions moved to keydefs.el
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45 (fset 'help-command help-map)
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46
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47 (let ((ch help-char))
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48 (if (integerp ch)
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49 (setq ch (char-to-string ch)))
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50 (define-key help-map ch 'help-for-help))
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51 (define-key help-map "?" 'help-for-help)
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52 (define-key help-map 'help 'help-for-help)
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53
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54 (define-key help-map "\C-l" 'describe-copying) ; on \C-c in FSFmacs
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55 (define-key help-map "\C-d" 'describe-distribution)
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56 (define-key help-map "\C-w" 'describe-no-warranty)
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57 (define-key help-map "a" 'hyper-apropos) ; 'command-apropos in FSFmacs
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58 (define-key help-map "A" 'command-apropos)
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59
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60 (define-key help-map "b" 'describe-bindings)
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61 (define-key help-map "\C-p" 'describe-pointer)
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62
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63 (define-key help-map "c" 'describe-key-briefly)
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64 (define-key help-map "k" 'describe-key)
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65
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66 (define-key help-map "d" 'describe-function)
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67 (define-key help-map "e" 'describe-last-error)
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68 (define-key help-map "f" 'describe-function)
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69
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70 (define-key help-map "F" 'xemacs-local-faq)
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71
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72 ;;; Setup so Hyperbole can be autoloaded from a key.
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73 ;;; Choose a key on which to place the Hyperbole menus.
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74 ;;; For most people this key binding will work and will be equivalent
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75 ;;; to {C-h h}.
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76 ;;;
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77 (or (where-is-internal 'hyperbole)
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78 (where-is-internal 'hui:menu)
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79 (define-key help-map "h" 'hyperbole))
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80 (autoload 'hyperbole "hsite" "Hyperbole info manager menus." t)
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81
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82 (define-key help-map "i" 'info)
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83 (define-key help-map '(control i) 'Info-query)
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84 ;; FSFmacs has Info-goto-emacs-command-node on C-f, no binding
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85 ;; for Info-elisp-ref
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86 (define-key help-map '(control c) 'Info-goto-emacs-command-node)
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87 (define-key help-map '(control k) 'Info-goto-emacs-key-command-node)
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88 (define-key help-map '(control f) 'Info-elisp-ref)
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89
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90 (define-key help-map "l" 'view-lossage)
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91
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92 (define-key help-map "m" 'describe-mode)
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93
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94 (define-key help-map "\C-n" 'view-emacs-news)
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95 (define-key help-map "n" 'view-emacs-news)
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96
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97 (define-key help-map "p" 'finder-by-keyword)
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98 (autoload 'finder-by-keyword "finder"
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99 "Find packages matching a given keyword." t)
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100
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101 (define-key help-map "s" 'describe-syntax)
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102
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103 (define-key help-map "t" 'help-with-tutorial)
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104
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105 (define-key help-map "w" 'where-is)
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106
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107 (define-key help-map "v" 'describe-variable)
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108
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109 (if (fboundp 'view-last-error)
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110 (define-key help-map "e" 'view-last-error))
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111
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112
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113 (define-key help-map "q" 'help-quit)
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114
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115 ;#### This stuff was an attempt to have font locking and hyperlinks in the
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116 ;help buffer, but it doesn't really work. Some of this stuff comes from
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117 ;FSF Emacs; but the FSF Emacs implementation is rather broken, as usual.
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118 ;What needs to happen is this:
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119 ;
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120 ; -- we probably need a "hyperlink mode" from which help-mode is derived.
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121 ; -- this means we probably need multiple inheritance of modes!
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122 ; Thankfully this is not hard to implement; we already have the
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123 ; ability for a keymap to have multiple parents. However, we'd
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124 ; have to define any multiply-inherited-from modes using a standard
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125 ; `define-mode' construction instead of manually doing it, because
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126 ; we don't want each guy calling `kill-all-local-variables' and
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127 ; messing up the previous one.
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128 ; -- we need to scan the buffer ourselves (not from font-lock, because
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129 ; the user might not have font-lock enabled) and highlight only
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130 ; those words that are *documented* functions and variables (and
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131 ; probably excluding words without dashes in them unless enclosed
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132 ; in quotes, so that common words like "list" and "point" don't
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133 ; become hyperlinks.
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134 ; -- we should *not* use font-lock keywords like below. Instead we
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135 ; should add the font-lock stuff ourselves during the scanning phase,
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136 ; if font-lock is enabled in this buffer.
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137
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138 ;(defun help-follow-reference (event extent user-data)
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139 ; (let ((symbol (intern-soft (extent-string extent))))
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140 ; (cond ((and symbol (fboundp symbol))
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141 ; (describe-function symbol))
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142 ; ((and symbol (boundp symbol))
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143 ; (describe-variable symbol))
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144 ; (t nil))))
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145
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146 ;(defvar help-font-lock-keywords
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147 ; (let ((name-char "[-+a-zA-Z0-9_*]") (sym-char "[-+a-zA-Z0-9_:*]"))
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148 ; (list
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149 ; ;;
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150 ; ;; The symbol itself.
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151 ; (list (concat "\\`\\(" name-char "+\\)\\(:\\)?")
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152 ; '(1 (if (match-beginning 2)
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153 ; 'font-lock-function-name-face
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154 ; 'font-lock-variable-name-face)
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155 ; nil t))
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156 ; ;;
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157 ; ;; Words inside `' which tend to be symbol names.
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158 ; (list (concat "`\\(" sym-char sym-char "+\\)'")
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159 ; 1 '(prog1
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160 ; 'font-lock-reference-face
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161 ; (add-list-mode-item (match-beginning 1)
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162 ; (match-end 1)
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163 ; nil
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164 ; 'help-follow-reference))
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165 ; t)
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166 ; ;;
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167 ; ;; CLisp `:' keywords as references.
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168 ; (list (concat "\\<:" sym-char "+\\>") 0 'font-lock-reference-face t)))
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169 ; "Default expressions to highlight in Help mode.")
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170
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171 ;(put 'help-mode 'font-lock-defaults '(help-font-lock-keywords))
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172
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173 (define-derived-mode help-mode view-major-mode "Help"
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174 "Major mode for viewing help text.
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175 Entry to this mode runs the normal hook `help-mode-hook'.
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176 Commands:
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177 \\{help-mode-map}"
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178 )
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179
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180 (define-key help-mode-map "q" 'help-mode-quit)
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181
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182 (defun help-mode-quit ()
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14
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183 "Exits from help mode, possibly restoring the previous window configuration."
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184 (interactive)
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185 (cond ((local-variable-p 'help-window-config (current-buffer))
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186 (let ((config help-window-config))
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187 (kill-local-variable 'help-window-config)
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14
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188 (bury-buffer)
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189 (set-window-configuration config)))
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190 ((one-window-p)
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191 (bury-buffer))
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192 (t
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193 (delete-window))))
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194
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195 (defun help-quit ()
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196 (interactive)
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197 nil)
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198
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199 ;; This is a grody hack of the same genotype as `advertised-undo'; if the
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200 ;; bindings of Backspace and C-h are the same, we want the menubar to claim
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201 ;; that `info' in invoked with `C-h i', not `BS i'.
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202
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203 (defun deprecated-help-command ()
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204 (interactive)
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205 (if (eq 'help-command (key-binding "\C-h"))
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206 (setq unread-command-event (character-to-event ?\C-h))
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207 (help-for-help)))
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208
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209 ;;(define-key global-map 'backspace 'deprecated-help-command)
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210
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211 ;; TUTORIAL arg is XEmacs addition
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212 (defun help-with-tutorial (&optional tutorial)
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213 "Select the XEmacs learn-by-doing tutorial.
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214 Optional arg TUTORIAL specifies the tutorial file; default is \"TUTORIAL\"."
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215 (interactive)
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216 (if (null tutorial)
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217 (setq tutorial "TUTORIAL"))
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218 (let ((file (expand-file-name (concat "~/" tutorial))))
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219 (delete-other-windows)
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220 (if (get-file-buffer file)
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221 (switch-to-buffer (get-file-buffer file))
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222 (switch-to-buffer (create-file-buffer file))
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223 (setq buffer-file-name file)
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224 (setq default-directory (expand-file-name "~/"))
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225 (setq buffer-auto-save-file-name nil)
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226 (insert-file-contents (expand-file-name tutorial data-directory))
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227 (goto-char (point-min))
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228 (search-forward "\n<<")
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229 (beginning-of-line)
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230 (delete-region (point) (progn (end-of-line) (point)))
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231 (let ((n (- (window-height (selected-window))
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232 (count-lines (point-min) (point))
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233 6)))
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234 (if (< n 12)
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235 (newline n)
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236 ;; Some people get confused by the large gap.
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237 (newline (/ n 2))
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238 (insert "[Middle of page left blank for didactic purposes. "
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239 "Text continues below]")
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240 (newline (- n (/ n 2)))))
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241 (goto-char (point-min))
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242 (set-buffer-modified-p nil))))
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243
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244 ;; used by describe-key and describe-key-briefly
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245
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246 (defun key-or-menu-binding (key &optional menu-flag)
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247 ;; KEY is any value returned by next-command-event
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248 ;; MENU-FLAG is a symbol that should be set to T if KEY is a menu event,
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249 ;; or NIL otherwise
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250 (let (defn)
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251 (and menu-flag (set menu-flag nil))
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252 ;; If the key typed was really a menu selection, grab the form out
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253 ;; of the event object and intuit the function that would be called,
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254 ;; and describe that instead.
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255 (if (and (vectorp key) (= 1 (length key))
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256 (or (misc-user-event-p (aref key 0))
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257 (eq (car-safe (aref key 0)) 'menu-selection)))
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258 (let ((event (aref key 0)))
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259 (setq defn (if (eventp event)
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260 (list (event-function event) (event-object event))
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261 (cdr event)))
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262 (and menu-flag (set menu-flag t))
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263 (if (eq (car defn) 'eval)
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264 (setq defn (car (cdr defn))))
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265 (if (eq (car-safe defn) 'call-interactively)
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266 (setq defn (car (cdr defn))))
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267 (if (and (consp defn) (null (cdr defn)))
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268 (setq defn (car defn))))
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269 ;; else
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270 (setq defn (key-binding key)))
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271 ;; kludge: if a toolbar button was pressed on, try to find the
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272 ;; binding of the toolbar button.
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273 (if (and (eq defn 'press-toolbar-button)
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274 (vectorp key)
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275 (button-press-event-p (aref key (1- (length key)))))
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276 ;; wait for the button release. We're on shaky ground here ...
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277 (let ((event (next-command-event))
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278 button)
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279 (if (and (button-release-event-p event)
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280 (event-over-toolbar-p event)
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281 (eq 'release-and-activate-toolbar-button
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282 (key-binding (vector event)))
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283 (setq button (event-toolbar-button event)))
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284 (toolbar-button-callback button)
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285 ;; if anything went wrong, try returning the binding of
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286 ;; the button-up event, of the original binding
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287 (or (key-or-menu-binding (vector event))
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288 defn)))
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289 ;; no toolbar kludge
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290 defn)
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291 ))
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292
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293 (defun describe-key-briefly (key)
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294 "Print the name of the function KEY invokes. KEY is a string."
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295 (interactive "kDescribe key briefly: ")
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296 (let (defn menup)
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297 (setq defn (key-or-menu-binding key 'menup))
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298 (if (or (null defn) (integerp defn))
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299 (message "%s is undefined" (key-description key))
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300 ;; If it's a keyboard macro which trivially invokes another command,
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301 ;; document that instead.
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302 (if (or (stringp defn) (vectorp defn))
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303 (setq defn (or (key-binding defn)
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304 defn)))
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305 (let ((last-event (and (vectorp key)
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306 (aref key (1- (length key))))))
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307 (message (if (or (button-press-event-p last-event)
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308 (button-release-event-p last-event))
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309 (gettext "%s at that spot runs the command %s")
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310 (gettext "%s runs the command %s"))
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311 ;; This used to say 'This menu item' but it could also
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312 ;; be a scrollbar event. We can't distinguish at the
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313 ;; moment.
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314 (if menup "This item" (key-description key))
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315 (if (symbolp defn) defn (prin1-to-string defn)))))))
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316
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317 ;; #### this is a horrible piece of shit function that should
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318 ;; not exist. In FSF 19.30 this function has gotten three times
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319 ;; as long and has tons and tons of dumb shit checking
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320 ;; special-display-buffer-names and such crap. I absolutely
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321 ;; refuse to insert that Ebolification here. I wanted to delete
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322 ;; this function entirely but Mly bitched.
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323 ;;
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324 ;; If your user-land code calls this function, rewrite it to
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325 ;; call with-displaying-help-buffer.
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326
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327 (defun print-help-return-message (&optional function)
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328 "Display or return message saying how to restore windows after help command.
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329 Computes a message and applies the optional argument FUNCTION to it.
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330 If FUNCTION is nil, applies `message' to it, thus printing it."
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331 (and (not (get-buffer-window standard-output))
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332 (funcall
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333 (or function 'message)
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334 (concat
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335 (substitute-command-keys
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336 (if (one-window-p t)
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337 (if pop-up-windows
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338 (gettext "Type \\[delete-other-windows] to remove help window.")
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339 (gettext "Type \\[switch-to-buffer] RET to remove help window."))
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340 (gettext "Type \\[switch-to-buffer-other-window] RET to restore the other window.")))
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341 (substitute-command-keys
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342 (gettext " \\[scroll-other-window] to scroll the help."))))))
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343
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344 (defvar help-selects-help-window t
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345 "*If nil, use the \"old Emacs\" behavior for Help buffers.
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346 This just displays the buffer in another window, rather than selecting
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347 the window.")
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348
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349 (defvar help-window-config nil)
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350
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351 ;; Use this function for displaying help when C-h something is pressed
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352 ;; or in similar situations. Do *not* use it when you are displaying
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353 ;; a help message and then prompting for input in the minibuffer --
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354 ;; this macro usually selects the help buffer, which is not what you
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355 ;; want in those situations.
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2
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356
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357 ;;; ### Should really be a macro (as suggested above) to eliminate the
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358 ;;; requirement of caller to code a lambda form in THUNK -- mrb
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0
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359 (defun with-displaying-help-buffer (thunk)
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360 (let ((winconfig (current-window-configuration))
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361 (was-one-window (one-window-p)))
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362 (prog1 (with-output-to-temp-buffer "*Help*"
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|
363 (prog1 (funcall thunk)
|
|
|
364 (save-excursion
|
|
|
365 (set-buffer standard-output)
|
|
|
366 (help-mode))))
|
|
|
367 (let ((helpwin (get-buffer-window "*Help*")))
|
|
|
368 (if helpwin
|
|
|
369 (progn
|
|
|
370 (save-excursion
|
|
|
371 (set-buffer (window-buffer helpwin))
|
|
|
372 (set (make-local-variable 'help-window-config) winconfig))
|
|
|
373 (if help-selects-help-window
|
|
|
374 (select-window helpwin))
|
|
|
375 (cond ((eq helpwin (selected-window))
|
|
|
376 (message
|
|
|
377 (substitute-command-keys "Type \\[help-mode-quit] to remove help window, \\[scroll-up] to scroll the help.")))
|
|
|
378 (was-one-window
|
|
|
379 (message
|
|
|
380 (substitute-command-keys "Type \\[delete-other-windows] to remove help window, \\[scroll-other-window] to scroll the help.")))
|
|
|
381 (t
|
|
|
382 (message
|
|
10
|
383 (substitute-command-keys "Type \\[switch-to-buffer-other-window] to restore the other window, \\[scroll-other-window] to scroll the help."))))
|
|
|
384 (shrink-window-if-larger-than-buffer helpwin)))))))
|
|
0
|
385
|
|
|
386 (defun describe-key (key)
|
|
|
387 "Display documentation of the function invoked by KEY.
|
|
|
388 KEY is a string, or vector of events.
|
|
|
389 When called interactvely, KEY may also be a menu selection."
|
|
|
390 (interactive "kDescribe key: ")
|
|
|
391 (let ((defn (key-or-menu-binding key)))
|
|
|
392 (if (or (null defn) (integerp defn))
|
|
|
393 (message "%s is undefined" (key-description key))
|
|
|
394 (with-displaying-help-buffer
|
|
|
395 (lambda ()
|
|
|
396 ; (princ (key-description key))
|
|
|
397 ; (princ " runs the command ")
|
|
|
398 (prin1 defn)
|
|
|
399 (princ ":\n")
|
|
|
400 (cond ((or (stringp defn) (vectorp defn))
|
|
|
401 (let ((cmd (key-binding defn)))
|
|
|
402 (if (not cmd)
|
|
|
403 (princ "a keyboard macro")
|
|
|
404 (progn
|
|
|
405 (princ (format "a keyboard macro which runs the command %s:\n\n"
|
|
|
406 cmd))
|
|
|
407 (princ cmd)
|
|
|
408 (princ "\n")
|
|
|
409 (if (documentation cmd) (princ (documentation cmd)))))))
|
|
|
410 ((and (consp defn) (not (eq 'lambda (car-safe defn))))
|
|
|
411 (princ "\n")
|
|
|
412 (let ((describe-function-show-arglist nil))
|
|
|
413 (describe-function-1 (car defn) standard-output)))
|
|
|
414 ((documentation defn)
|
|
|
415 (princ (documentation defn)))
|
|
|
416 (t
|
|
|
417 (princ "not documented"))))))))
|
|
|
418
|
|
|
419 (defun describe-mode ()
|
|
|
420 "Display documentation of current major mode and minor modes.
|
|
|
421 For this to work correctly for a minor mode, the mode's indicator variable
|
|
|
422 \(listed in `minor-mode-alist') must also be a function whose documentation
|
|
|
423 describes the minor mode."
|
|
|
424 (interactive)
|
|
|
425 (with-displaying-help-buffer
|
|
|
426 (lambda ()
|
|
|
427 ;; XEmacs change: print the major-mode documentation before
|
|
|
428 ;; the minor modes.
|
|
|
429 (princ mode-name)
|
|
|
430 (princ " mode:\n")
|
|
|
431 (princ (documentation major-mode))
|
|
|
432 (princ "\n\n----\n\n")
|
|
|
433 (let ((minor-modes minor-mode-alist))
|
|
|
434 (while minor-modes
|
|
|
435 (let* ((minor-mode (car (car minor-modes)))
|
|
|
436 (indicator (car (cdr (car minor-modes)))))
|
|
|
437 ;; Document a minor mode if it is listed in minor-mode-alist,
|
|
|
438 ;; bound locally in this buffer, non-nil, and has a function
|
|
|
439 ;; definition.
|
|
|
440 (if (and (boundp minor-mode)
|
|
|
441 (symbol-value minor-mode)
|
|
|
442 (fboundp minor-mode))
|
|
|
443 (let ((pretty-minor-mode minor-mode))
|
|
|
444 (if (string-match "-mode\\'" (symbol-name minor-mode))
|
|
|
445 (setq pretty-minor-mode
|
|
|
446 (capitalize
|
|
|
447 (substring (symbol-name minor-mode)
|
|
|
448 0 (match-beginning 0)))))
|
|
|
449 (while (and (consp indicator) (extentp (car indicator)))
|
|
|
450 (setq indicator (cdr indicator)))
|
|
|
451 (while (and indicator (symbolp indicator))
|
|
|
452 (setq indicator (symbol-value indicator)))
|
|
|
453 (princ (format "%s minor mode (indicator%s):\n"
|
|
|
454 pretty-minor-mode indicator))
|
|
|
455 (princ (documentation minor-mode))
|
|
|
456 (princ "\n\n----\n\n"))))
|
|
|
457 (setq minor-modes (cdr minor-modes)))))))
|
|
|
458
|
|
|
459 ;; So keyboard macro definitions are documented correctly
|
|
|
460 (fset 'defining-kbd-macro (symbol-function 'start-kbd-macro))
|
|
|
461
|
|
|
462 (defun describe-distribution ()
|
|
|
463 "Display info on how to obtain the latest version of XEmacs."
|
|
|
464 (interactive)
|
|
|
465 (find-file-read-only
|
|
|
466 (expand-file-name "DISTRIB" data-directory)))
|
|
|
467
|
|
|
468 (defun describe-copying ()
|
|
|
469 "Display info on how you may redistribute copies of XEmacs."
|
|
|
470 (interactive)
|
|
|
471 (find-file-read-only
|
|
|
472 (expand-file-name "COPYING" data-directory))
|
|
|
473 (goto-char (point-min)))
|
|
|
474
|
|
|
475 (defun describe-pointer ()
|
|
|
476 "Show a list of all defined mouse buttons, and their definitions."
|
|
|
477 (interactive)
|
|
|
478 (describe-bindings nil t))
|
|
|
479
|
|
|
480 (defun describe-project ()
|
|
|
481 "Display info on the GNU project."
|
|
|
482 (interactive)
|
|
|
483 (find-file-read-only
|
|
|
484 (expand-file-name "GNU" data-directory))
|
|
|
485 (goto-char (point-min)))
|
|
|
486
|
|
|
487 (defun describe-no-warranty ()
|
|
|
488 "Display info on all the kinds of warranty XEmacs does NOT have."
|
|
|
489 (interactive)
|
|
|
490 (describe-copying)
|
|
|
491 (let (case-fold-search)
|
|
|
492 (search-forward "NO WARRANTY")
|
|
|
493 (recenter 0)))
|
|
|
494
|
|
|
495 (defun describe-bindings (&optional prefix mouse-only-p)
|
|
|
496 "Show a list of all defined keys, and their definitions.
|
|
|
497 The list is put in a buffer, which is displayed.
|
|
|
498 If the optional argument PREFIX is supplied, only commands which
|
|
|
499 start with that sequence of keys are described.
|
|
|
500 If the second argument (prefix arg, interactively) is non-null
|
|
|
501 then only the mouse bindings are displayed."
|
|
|
502 (interactive (list nil current-prefix-arg))
|
|
|
503 (with-displaying-help-buffer
|
|
|
504 (lambda ()
|
|
|
505 (describe-bindings-1 prefix mouse-only-p))))
|
|
|
506
|
|
|
507 (defun describe-bindings-1 (&optional prefix mouse-only-p)
|
|
|
508 (let ((heading (if mouse-only-p
|
|
|
509 (gettext "button binding\n------ -------\n")
|
|
|
510 (gettext "key binding\n--- -------\n")))
|
|
|
511 (buffer (current-buffer))
|
|
|
512 (minor minor-mode-map-alist)
|
|
|
513 (local (current-local-map))
|
|
|
514 (shadow '()))
|
|
|
515 (set-buffer standard-output)
|
|
|
516 (while minor
|
|
|
517 (let ((sym (car (car minor)))
|
|
|
518 (map (cdr (car minor))))
|
|
|
519 (if (symbol-value-in-buffer sym buffer nil)
|
|
|
520 (progn
|
|
|
521 (insert (format "Minor Mode Bindings for `%s':\n"
|
|
|
522 sym)
|
|
|
523 heading)
|
|
|
524 (describe-bindings-internal map nil shadow prefix mouse-only-p)
|
|
|
525 (insert "\n")
|
|
|
526 (setq shadow (cons map shadow))))
|
|
|
527 (setq minor (cdr minor))))
|
|
|
528 (if local
|
|
|
529 (progn
|
|
|
530 (insert "Local Bindings:\n" heading)
|
|
|
531 (describe-bindings-internal local nil shadow prefix mouse-only-p)
|
|
|
532 (insert "\n")
|
|
|
533 (setq shadow (cons local shadow))))
|
|
|
534 (insert "Global Bindings:\n" heading)
|
|
|
535 (describe-bindings-internal (current-global-map)
|
|
|
536 nil shadow prefix mouse-only-p)
|
|
|
537 (set-buffer buffer)))
|
|
|
538
|
|
|
539 (defun describe-prefix-bindings ()
|
|
|
540 "Describe the bindings of the prefix used to reach this command.
|
|
|
541 The prefix described consists of all but the last event
|
|
|
542 of the key sequence that ran this command."
|
|
|
543 (interactive)
|
|
|
544 (let* ((key (this-command-keys))
|
|
|
545 (prefix (make-vector (1- (length key)) nil))
|
|
|
546 i)
|
|
|
547 (setq i 0)
|
|
|
548 (while (< i (length prefix))
|
|
|
549 (aset prefix i (aref key i))
|
|
|
550 (setq i (1+ i)))
|
|
|
551 (with-displaying-help-buffer
|
|
|
552 (lambda ()
|
|
|
553 (princ "Key bindings starting with ")
|
|
|
554 (princ (key-description prefix))
|
|
|
555 (princ ":\n\n")
|
|
|
556 (describe-bindings-1 prefix nil)))))
|
|
|
557
|
|
|
558 ;; Make C-h after a prefix, when not specifically bound,
|
|
|
559 ;; run describe-prefix-bindings.
|
|
|
560 (setq prefix-help-command 'describe-prefix-bindings)
|
|
|
561
|
|
|
562 (defun view-emacs-news ()
|
|
|
563 "Display info on recent changes to XEmacs."
|
|
|
564 (interactive)
|
|
|
565 (require 'outl-mouse)
|
|
|
566 (find-file (expand-file-name "NEWS" data-directory)))
|
|
|
567
|
|
|
568 (defun xemacs-www-page ()
|
|
|
569 "Go to the XEmacs World Wide Web page."
|
|
|
570 (interactive)
|
|
|
571 (funcall browse-url-browser-function "http://www.xemacs.org/"))
|
|
|
572
|
|
|
573 (defun xemacs-www-faq ()
|
|
|
574 "View the latest and greatest XEmacs FAQ using the World Wide Web."
|
|
|
575 (interactive)
|
|
|
576 (funcall browse-url-browser-function "http://www.xemacs.org/faq/index.html"))
|
|
|
577
|
|
|
578 (defun xemacs-local-faq ()
|
|
|
579 "View the local copy of the XEmacs FAQ.
|
|
|
580 If you have access to the World Wide Web, you should use `xemacs-www-faq'
|
|
|
581 instead, to ensure that you get the most up-to-date information."
|
|
|
582 (interactive)
|
|
|
583 (save-window-excursion
|
|
|
584 (info)
|
|
|
585 (Info-find-node "xemacs-faq" "Top"))
|
|
|
586 (switch-to-buffer "*info*"))
|
|
|
587
|
|
|
588 (defun view-lossage ()
|
|
|
589 "Display last 100 input keystrokes and last 100 or so minibuffer messages."
|
|
|
590 (interactive)
|
|
|
591 (with-displaying-help-buffer
|
|
|
592 (lambda ()
|
|
|
593 (princ (key-description (recent-keys)))
|
|
|
594 (save-excursion
|
|
|
595 (set-buffer standard-output)
|
|
|
596 (goto-char (point-min))
|
|
|
597 (insert "Recent keystrokes:\n\n")
|
|
|
598 (while (progn (move-to-column 50) (not (eobp)))
|
|
|
599 (search-forward " " nil t)
|
|
|
600 (insert "\n")))
|
|
|
601 ;; XEmacs addition
|
|
|
602 (princ "\n\n\nRecent minibuffer messages (most recent first):\n\n")
|
|
|
603 (save-excursion
|
|
|
604 (let ((buffer (get-buffer " *Message-Log*"))
|
|
|
605 (count 0)
|
|
|
606 oldpoint)
|
|
|
607 (set-buffer buffer)
|
|
|
608 (goto-char (point-max))
|
|
|
609 (set-buffer standard-output)
|
|
|
610 (while (and (> (point buffer) (point-min buffer))
|
|
|
611 (< count 100))
|
|
|
612 (setq oldpoint (point buffer))
|
|
|
613 (forward-line -1 buffer)
|
|
|
614 (insert-buffer-substring buffer (point buffer) oldpoint)
|
|
|
615 (setq count (1+ count))))))))
|
|
|
616
|
|
|
617 (define-function 'help 'help-for-help)
|
|
|
618 ;; #### FSF calls `make-help-screen' here. We need to port `help-macro.el'.
|
|
|
619 (defun help-for-help ()
|
|
|
620 "You have typed \\[help-for-help], the help character. Type a Help option:
|
|
|
621 \(Use SPC or DEL to scroll through this text. Type \\<help-map>\\[help-quit] to exit the Help command.)
|
|
|
622
|
|
|
623 \\[hyper-apropos] Give a substring, and see a hypertext list of
|
|
|
624 functions and variables that contain that substring.
|
|
|
625 See also the `apropos' command.
|
|
|
626 \\[command-apropos] Give a substring, and see a list of commands
|
|
|
627 (functions interactively callable) that contain that substring.
|
|
|
628 \\[describe-bindings] Display table of all key bindings.
|
|
|
629 \\[describe-key-briefly] Type a command key sequence;
|
|
|
630 it prints the function name that sequence runs.
|
|
|
631 \\[Info-goto-emacs-command-node] Type a function name;
|
|
|
632 it takes you to the Info node for that command.
|
|
|
633 \\[describe-function] Type a function name and get documentation of it.
|
|
|
634 \\[Info-elisp-ref] Type a function name and jump to the full documentation
|
|
|
635 in the XEmacs Lisp Programmer's Manual.
|
|
|
636 \\[xemacs-local-faq] To view a local copy of the XEmacs FAQ.
|
|
|
637 \\[info] The info documentation reader.
|
|
|
638 \\[Info-query] Info reader, prompt for topic name.
|
|
|
639 \\[describe-key] Type a command key sequence;
|
|
|
640 it displays the full documentation.
|
|
|
641 \\[Info-goto-emacs-key-command-node] Type a command key sequence;
|
|
|
642 it takes you to the Info node for the command bound to that key.
|
|
|
643 \\[view-lossage] Shows last 100 characters you typed.
|
|
|
644 \\[describe-mode] Print documentation of current major mode,
|
|
|
645 which describes the commands peculiar to it.
|
|
|
646 \\[view-emacs-news] Shows emacs news file.
|
|
|
647 \\[finder-by-keyword] Find packages matching a given topic keyword.
|
|
|
648 \\[describe-pointer] Display table of all mouse-button bindings.
|
|
|
649 \\[describe-syntax] Display contents of syntax table, plus explanations
|
|
|
650 \\[help-with-tutorial] Select the XEmacs learn-by-doing tutorial.
|
|
|
651 \\[describe-variable] Type name of a variable;
|
|
|
652 it displays the variable's documentation and value.
|
|
|
653 \\[where-is] Type command name;
|
|
|
654 it prints which keystrokes invoke that command.
|
|
|
655 \\[describe-distribution] XEmacs ordering information.
|
|
|
656 \\[describe-copying] print XEmacs copying permission (General Public License).
|
|
|
657 \\[view-emacs-news] print print news of recent XEmacs changes.
|
|
|
658 \\[describe-no-warranty] print information on absence of warranty for XEmacs."
|
|
|
659 (interactive)
|
|
|
660 (let ((help-key (copy-event last-command-event))
|
|
|
661 event char)
|
|
|
662 (message (gettext "A B C F I K L M N P S T V W C-c C-d C-n C-w. Type %s again for more help: ")
|
|
|
663 ;; arrgh, no room for "C-i C-k C-f" !!
|
|
|
664 (single-key-description help-key))
|
|
|
665 (setq event (next-command-event)
|
|
|
666 char (event-to-character event))
|
|
|
667 (if (or (equal event help-key)
|
|
|
668 (eq char ??)
|
|
|
669 (eq 'help-command (key-binding event)))
|
|
|
670 (save-window-excursion
|
|
|
671 (switch-to-buffer "*Help*")
|
|
|
672 ;; #### I18N3 should mark buffer as output-translating
|
|
|
673 (delete-other-windows)
|
|
|
674 (let ((buffer-read-only nil))
|
|
|
675 (erase-buffer)
|
|
|
676 (insert (documentation 'help-for-help)))
|
|
|
677 (goto-char (point-min))
|
|
|
678 (while (or (equal event help-key)
|
|
|
679 (eq char ??)
|
|
|
680 (eq 'help-command (key-binding event))
|
|
|
681 (eq char ? )
|
|
|
682 (eq 'scroll-up (key-binding event))
|
|
|
683 (eq char ?\177)
|
|
10
|
684 (and (not (eq char ?b))
|
|
|
685 (eq 'scroll-down (key-binding event))))
|
|
0
|
686 (if (or (eq char ? )
|
|
|
687 (eq 'scroll-up (key-binding event)))
|
|
|
688 (scroll-up))
|
|
|
689 (if (or (eq char ?\177)
|
|
10
|
690 (and (not (eq char ?b))
|
|
|
691 (eq 'scroll-down (key-binding event))))
|
|
0
|
692 (scroll-down))
|
|
|
693 ;; write this way for I18N3 snarfing
|
|
|
694 (if (pos-visible-in-window-p (point-max))
|
|
|
695 (message "A B C F I K L M N P S T V W C-c C-d C-n C-w C-i C-k C-f: ")
|
|
|
696 (message "A B C F I K L M N P S T V W C-c C-d C-n C-w C-i C-k C-f or Space to scroll: "))
|
|
|
697 (let ((cursor-in-echo-area t))
|
|
|
698 (setq event (next-command-event event)
|
|
|
699 char (or (event-to-character event) event))))))
|
|
|
700 (let ((defn (or (lookup-key help-map (vector event))
|
|
|
701 (and (numberp char)
|
|
|
702 (lookup-key help-map (make-string 1 (downcase char)))))))
|
|
|
703 (message nil)
|
|
|
704 (if defn
|
|
|
705 (call-interactively defn)
|
|
|
706 (ding)))))
|
|
|
707
|
|
|
708 ;; Return a function which is called by the list containing point.
|
|
|
709 ;; If that gives no function, return a function whose name is around point.
|
|
|
710 ;; If that doesn't give a function, return nil.
|
|
|
711 (defun function-called-at-point ()
|
|
|
712 (or (condition-case ()
|
|
|
713 (save-excursion
|
|
|
714 (save-restriction
|
|
|
715 (narrow-to-region (max (point-min) (- (point) 1000)) (point-max))
|
|
|
716 (backward-up-list 1)
|
|
|
717 (forward-char 1)
|
|
|
718 (let (obj)
|
|
|
719 (setq obj (read (current-buffer)))
|
|
|
720 (and (symbolp obj) (fboundp obj) obj))))
|
|
|
721 (error nil))
|
|
|
722 (condition-case ()
|
|
|
723 (let ((stab (syntax-table)))
|
|
|
724 (unwind-protect
|
|
|
725 (save-excursion
|
|
|
726 (set-syntax-table emacs-lisp-mode-syntax-table)
|
|
|
727 (or (not (zerop (skip-syntax-backward "_w")))
|
|
|
728 (eq (char-syntax (following-char)) ?w)
|
|
|
729 (eq (char-syntax (following-char)) ?_)
|
|
|
730 (forward-sexp -1))
|
|
|
731 (skip-chars-forward "`'")
|
|
|
732 (let ((obj (read (current-buffer))))
|
|
|
733 (and (symbolp obj) (fboundp obj) obj)))
|
|
|
734 (set-syntax-table stab)))
|
|
|
735 (error nil))))
|
|
|
736
|
|
|
737 (defvar describe-function-show-arglist t ; default to nil for the non-hackers?
|
|
|
738 "*If true, then describe-function will show its arglist if the function is
|
|
|
739 not an autoload.")
|
|
|
740
|
|
|
741 (defun describe-function-find-file (function)
|
|
|
742 (and (boundp 'load-history) ; not standardly bound in XEmacs
|
|
|
743 (let ((files load-history)
|
|
|
744 file)
|
|
|
745 (while files
|
|
|
746 (if (memq function (cdr (car files)))
|
|
|
747 (setq file (car (car files)) files nil))
|
|
|
748 (setq files (cdr files)))
|
|
|
749 file)))
|
|
|
750
|
|
|
751 (defun describe-function (function)
|
|
|
752 "Display the full documentation of FUNCTION (a symbol)."
|
|
|
753 (interactive
|
|
|
754 (let* ((fn (function-called-at-point))
|
|
|
755 (val (let ((enable-recursive-minibuffers t))
|
|
|
756 (completing-read
|
|
|
757 (if fn
|
|
|
758 (format (gettext "Describe function (default %s): ")
|
|
|
759 fn)
|
|
|
760 (gettext "Describe function: "))
|
|
|
761 obarray 'fboundp t))))
|
|
|
762 (list (if (equal val "") fn (intern val)))))
|
|
|
763 (with-displaying-help-buffer
|
|
|
764 (lambda ()
|
|
|
765 (describe-function-1 function standard-output)
|
|
|
766 (save-excursion
|
|
|
767 (set-buffer standard-output)
|
|
|
768 ;; Return the text we displayed.
|
|
|
769 (buffer-string)))))
|
|
|
770
|
|
|
771 (defun function-obsolete-p (function)
|
|
|
772 "Return non-nil if FUNCTION is obsolete."
|
|
|
773 (not (null (get function 'byte-obsolete-info))))
|
|
|
774
|
|
|
775 (defun function-obsoleteness-doc (function)
|
|
|
776 "If FUNCTION is obsolete, return a string describing this."
|
|
|
777 (let ((obsolete (get function 'byte-obsolete-info)))
|
|
|
778 (if obsolete
|
|
|
779 (format "Obsolete; %s"
|
|
|
780 (if (stringp (car obsolete))
|
|
|
781 (car obsolete)
|
|
|
782 (format "use `%s' instead." (car obsolete)))))))
|
|
|
783
|
|
|
784 ;Here are all the possibilities below spelled out, for the benefit
|
|
|
785 ;of the I18N3 snarfer.
|
|
|
786 ;
|
|
|
787 ;(gettext "a built-in function")
|
|
|
788 ;(gettext "an interactive built-in function")
|
|
|
789 ;(gettext "a built-in macro")
|
|
|
790 ;(gettext "an interactive built-in macro")
|
|
|
791 ;(gettext "a compiled Lisp function")
|
|
|
792 ;(gettext "an interactive compiled Lisp function")
|
|
|
793 ;(gettext "a compiled Lisp macro")
|
|
|
794 ;(gettext "an interactive compiled Lisp macro")
|
|
|
795 ;(gettext "a Lisp function")
|
|
|
796 ;(gettext "an interactive Lisp function")
|
|
|
797 ;(gettext "a Lisp macro")
|
|
|
798 ;(gettext "an interactive Lisp macro")
|
|
|
799 ;(gettext "a mocklisp function")
|
|
|
800 ;(gettext "an interactive mocklisp function")
|
|
|
801 ;(gettext "a mocklisp macro")
|
|
|
802 ;(gettext "an interactive mocklisp macro")
|
|
|
803 ;(gettext "an autoloaded Lisp function")
|
|
|
804 ;(gettext "an interactive autoloaded Lisp function")
|
|
|
805 ;(gettext "an autoloaded Lisp macro")
|
|
|
806 ;(gettext "an interactive autoloaded Lisp macro")
|
|
|
807
|
|
|
808 (defun describe-function-1 (function stream &optional nodoc)
|
|
|
809 (prin1 function stream)
|
|
|
810 (princ ": " stream)
|
|
|
811 (let* ((def function)
|
|
|
812 file-name
|
|
|
813 (doc (or (documentation function)
|
|
|
814 (gettext "not documented")))
|
|
|
815 aliases kbd-macro-p fndef macrop)
|
|
|
816 (while (symbolp def)
|
|
|
817 (or (eq def function)
|
|
|
818 (if aliases
|
|
|
819 ;; I18N3 Need gettext due to concat
|
|
|
820 (setq aliases (concat aliases
|
|
|
821 (format "\n which is an alias for %s, "
|
|
|
822 (symbol-name def))))
|
|
|
823 (setq aliases (format "an alias for %s, " (symbol-name def)))))
|
|
|
824 (setq def (symbol-function def)))
|
|
|
825 (if (eq 'macro (car-safe def))
|
|
|
826 (setq fndef (cdr def)
|
|
|
827 macrop t)
|
|
|
828 (setq fndef def))
|
|
|
829 (if describe-function-show-arglist
|
|
|
830 (if (cond ((eq 'autoload (car-safe fndef))
|
|
|
831 nil)
|
|
|
832 ((eq 'lambda (car-safe fndef))
|
|
|
833 (princ (or (nth 1 fndef) "()") stream)
|
|
|
834 t)
|
|
|
835 ((compiled-function-p fndef)
|
|
|
836 (princ (or (compiled-function-arglist fndef) "()") stream)
|
|
|
837 t)
|
|
|
838 ((and (subrp fndef)
|
|
|
839 (string-match "[\n\t ]*\narguments: ?\\((.*)\\)\n?\\'"
|
|
|
840 doc))
|
|
|
841 (princ (substring doc (match-beginning 1) (match-end 1))
|
|
|
842 stream)
|
|
|
843 (setq doc (substring doc 0 (match-beginning 0)))
|
|
|
844 t)
|
|
|
845 (t
|
|
|
846 nil))
|
|
|
847 (princ "\n -- " stream)))
|
|
|
848 (if aliases (princ aliases stream))
|
|
|
849 (let ((int #'(lambda (string an-p macro-p)
|
|
|
850 (princ (format
|
|
|
851 (gettext (concat
|
|
|
852 (cond ((commandp def)
|
|
|
853 "an interactive ")
|
|
|
854 (an-p "an ")
|
|
|
855 (t "a "))
|
|
|
856 "%s"
|
|
|
857 (if macro-p " macro" " function")))
|
|
|
858 string)
|
|
|
859 stream))))
|
|
|
860 (cond ((or (stringp def) (vectorp def))
|
|
|
861 (princ "a keyboard macro." stream)
|
|
|
862 (setq kbd-macro-p t))
|
|
|
863 ((subrp fndef)
|
|
|
864 (funcall int "built-in" nil macrop))
|
|
|
865 ((compiled-function-p fndef)
|
|
|
866 (funcall int "compiled Lisp" nil macrop))
|
|
|
867 ; XEmacs -- we handle aliases above.
|
|
|
868 ; ((symbolp fndef)
|
|
|
869 ; (princ (format "alias for `%s'"
|
|
|
870 ; (prin1-to-string def)) stream))
|
|
|
871 ((eq (car-safe fndef) 'lambda)
|
|
|
872 (funcall int "Lisp" nil macrop))
|
|
|
873 ((eq (car-safe fndef) 'mocklisp)
|
|
|
874 (funcall int "mocklisp" nil macrop))
|
|
|
875 ((eq (car-safe def) 'autoload)
|
|
|
876 (setq file-name (elt def 1))
|
|
|
877 (funcall int "autoloaded Lisp" t (elt def 4)))
|
|
|
878 (t
|
|
|
879 nil)))
|
|
|
880 (or file-name
|
|
|
881 (setq file-name (describe-function-find-file function)))
|
|
|
882 (if file-name
|
|
|
883 (princ (format ".\n -- loads from \"%s\"" file-name) stream))
|
|
|
884 (princ ".")
|
|
|
885 (terpri)
|
|
|
886 (cond (kbd-macro-p
|
|
|
887 (princ "These characters are executed:\n\n\t" stream)
|
|
|
888 (princ (key-description def) stream)
|
|
|
889 (cond ((setq def (key-binding def))
|
|
|
890 (princ (format "\n\nwhich executes the command %s.\n\n" def) stream)
|
|
|
891 (describe-function-1 def stream))))
|
|
|
892 (nodoc nil)
|
|
|
893 (t
|
|
|
894 ;; tell the user about obsoleteness.
|
|
|
895 ;; If the function is obsolete and is aliased, don't
|
|
|
896 ;; even bother to report the documentation, as a further
|
|
|
897 ;; encouragement to use the new function.
|
|
|
898 (let ((obsolete (function-obsoleteness-doc function)))
|
|
|
899 (if obsolete
|
|
|
900 (progn
|
|
|
901 (princ obsolete stream)
|
|
|
902 (terpri stream)
|
|
|
903 (terpri stream)))
|
|
|
904 (if (not (and obsolete aliases))
|
|
|
905 (progn
|
|
|
906 (princ doc stream)
|
|
|
907 (or (eq ?\n (aref doc (1- (length doc))))
|
|
|
908 (terpri)))))))))
|
|
|
909
|
|
|
910
|
|
|
911 (defun describe-function-arglist (function)
|
|
|
912 (interactive (list (or (function-called-at-point)
|
|
|
913 (error "no function call at point"))))
|
|
|
914 (let ((b nil))
|
|
|
915 (unwind-protect
|
|
|
916 (save-excursion
|
|
|
917 (set-buffer (setq b (get-buffer-create " *arglist*")))
|
|
|
918 (buffer-disable-undo b)
|
|
|
919 (erase-buffer)
|
|
|
920 (describe-function-1 function b t)
|
|
|
921 (goto-char (point-min))
|
|
|
922 (end-of-line)
|
|
|
923 (or (eobp) (delete-char 1))
|
|
|
924 (just-one-space)
|
|
|
925 (end-of-line)
|
|
|
926 (message (buffer-substring (point-min) (point))))
|
|
|
927 (and b (kill-buffer b)))))
|
|
|
928
|
|
|
929
|
|
|
930 (defun variable-at-point ()
|
|
|
931 (condition-case ()
|
|
|
932 (let ((stab (syntax-table)))
|
|
|
933 (unwind-protect
|
|
|
934 (save-excursion
|
|
|
935 (set-syntax-table emacs-lisp-mode-syntax-table)
|
|
|
936 (or (not (zerop (skip-syntax-backward "_w")))
|
|
|
937 (eq (char-syntax (following-char)) ?w)
|
|
|
938 (eq (char-syntax (following-char)) ?_)
|
|
|
939 (forward-sexp -1))
|
|
|
940 (skip-chars-forward "'")
|
|
|
941 (let ((obj (read (current-buffer))))
|
|
|
942 (and (symbolp obj) (boundp obj) obj)))
|
|
|
943 (set-syntax-table stab)))
|
|
|
944 (error nil)))
|
|
|
945
|
|
|
946 (defun variable-obsolete-p (variable)
|
|
|
947 "Return non-nil if VARIABLE is obsolete."
|
|
|
948 (not (null (get variable 'byte-obsolete-variable))))
|
|
|
949
|
|
|
950 (defun variable-obsoleteness-doc (variable)
|
|
|
951 "If VARIABLE is obsolete, return a string describing this."
|
|
|
952 (let ((obsolete (get variable 'byte-obsolete-variable)))
|
|
|
953 (if obsolete
|
|
|
954 (format "Obsolete; %s"
|
|
|
955 (if (stringp obsolete)
|
|
|
956 obsolete
|
|
|
957 (format "use `%s' instead." obsolete))))))
|
|
|
958
|
|
|
959 (defun built-in-variable-doc (variable)
|
|
|
960 "Return a string describing whether VARIABLE is built-in."
|
|
|
961 (let ((type (built-in-variable-type variable)))
|
|
|
962 (cond ((eq type 'integer) "a built-in integer variable")
|
|
|
963 ((eq type 'const-integer) "a built-in constant integer variable")
|
|
|
964 ((eq type 'boolean) "a built-in boolean variable")
|
|
|
965 ((eq type 'const-boolean) "a built-in constant boolean variable")
|
|
|
966 ((eq type 'object) "a simple built-in variable")
|
|
|
967 ((eq type 'const-object) "a simple built-in constant variable")
|
|
|
968 ((eq type 'const-specifier) "a built-in constant specifier variable")
|
|
|
969 ((eq type 'current-buffer) "a built-in buffer-local variable")
|
|
|
970 ((eq type 'const-current-buffer)
|
|
|
971 "a built-in constant buffer-local variable")
|
|
|
972 ((eq type 'default-buffer)
|
|
|
973 "a built-in default buffer-local variable")
|
|
|
974 ((eq type 'selected-console) "a built-in console-local variable")
|
|
|
975 ((eq type 'const-selected-console)
|
|
|
976 "a built-in constant console-local variable")
|
|
|
977 ((eq type 'default-console)
|
|
|
978 "a built-in default console-local variable")
|
|
|
979 (type "an unknown type of built-in variable?")
|
|
|
980 (t "a variable declared in Lisp"))))
|
|
|
981
|
|
|
982 (defun describe-variable (variable)
|
|
|
983 "Display the full documentation of VARIABLE (a symbol)."
|
|
|
984 (interactive
|
|
|
985 (let* ((v (variable-at-point))
|
|
|
986 (val (let ((enable-recursive-minibuffers t))
|
|
|
987 (completing-read
|
|
|
988 (if v
|
|
|
989 (format "Describe variable (default %s): " v)
|
|
|
990 (gettext "Describe variable: "))
|
|
|
991 obarray 'boundp t))))
|
|
|
992 (list (if (equal val "") v (intern val)))))
|
|
|
993 (with-displaying-help-buffer
|
|
|
994 (lambda ()
|
|
|
995 (let ((origvar variable)
|
|
|
996 aliases)
|
|
|
997 (let ((print-escape-newlines t))
|
|
|
998 (while (variable-alias variable)
|
|
|
999 (let ((newvar (variable-alias variable)))
|
|
|
1000 (if aliases
|
|
|
1001 ;; I18N3 Need gettext due to concat
|
|
|
1002 (setq aliases
|
|
|
1003 (concat aliases
|
|
|
1004 (format ",\n which is an alias for %s"
|
|
|
1005 (symbol-name newvar))))
|
|
|
1006 (setq aliases
|
|
|
1007 (format "%s is an alias for %s"
|
|
|
1008 (symbol-name variable)
|
|
|
1009 (symbol-name newvar))))
|
|
|
1010 (setq variable newvar)))
|
|
|
1011 (if aliases
|
|
|
1012 (princ (format "%s.\n" aliases)))
|
|
|
1013 (if (not (boundp variable))
|
|
|
1014 (princ (format "%s is void" variable))
|
|
|
1015 (princ (format "%s's value is " variable))
|
|
|
1016 (prin1 (symbol-value variable)))
|
|
|
1017 (terpri)
|
|
|
1018 (princ " -- ")
|
|
|
1019 (princ (built-in-variable-doc variable))
|
|
|
1020 (princ ".")
|
|
|
1021 (terpri)
|
|
|
1022 (cond ((local-variable-p variable (current-buffer))
|
|
|
1023 (let* ((void (cons nil nil))
|
|
|
1024 (def (condition-case nil
|
|
|
1025 (default-value variable)
|
|
|
1026 (error void))))
|
|
|
1027 (princ "This value is specific to the current buffer.")
|
|
|
1028 (terpri)
|
|
|
1029 (if (local-variable-p variable nil)
|
|
|
1030 (progn
|
|
|
1031 (princ "(Its value is local to each buffer.)")
|
|
|
1032 (terpri)))
|
|
|
1033 (if (if (eq def void)
|
|
|
1034 (boundp variable)
|
|
|
1035 (not (eq (symbol-value variable) def)))
|
|
|
1036 ;; #### I18N3 doesn't localize properly!
|
|
|
1037 (progn (princ "Its default-value is ")
|
|
|
1038 (if (eq def void)
|
|
|
1039 (princ "void.")
|
|
|
1040 (prin1 def))
|
|
|
1041 (terpri)))))
|
|
|
1042 ((local-variable-p variable (current-buffer) t)
|
|
|
1043 (princ "Setting it would make its value buffer-local.\n")
|
|
|
1044 (terpri))))
|
|
|
1045 (terpri)
|
|
|
1046 (princ "Documentation:")
|
|
|
1047 (terpri)
|
|
|
1048 (let ((doc (documentation-property variable 'variable-documentation))
|
|
|
1049 (obsolete (variable-obsoleteness-doc origvar)))
|
|
|
1050 (if obsolete
|
|
|
1051 (progn
|
|
|
1052 (princ obsolete)
|
|
|
1053 (terpri)
|
|
|
1054 (terpri)))
|
|
|
1055 ;; don't bother to print anything if variable is obsolete and aliased.
|
|
|
1056 (if (or (not obsolete) (not aliases))
|
|
|
1057 (if doc
|
|
|
1058 ;; note: documentation-property calls substitute-command-keys.
|
|
|
1059 (princ doc)
|
|
|
1060 (princ "not documented as a variable."))))
|
|
|
1061 (save-excursion
|
|
|
1062 (set-buffer standard-output)
|
|
|
1063 ;; Return the text we displayed.
|
|
|
1064 (buffer-string))))))
|
|
|
1065
|
|
|
1066 (defun where-is (definition)
|
|
|
1067 "Print message listing key sequences that invoke specified command.
|
|
|
1068 Argument is a command definition, usually a symbol with a function definition."
|
|
|
1069 (interactive
|
|
|
1070 (let ((fn (function-called-at-point))
|
|
|
1071 (enable-recursive-minibuffers t)
|
|
|
1072 val)
|
|
|
1073 ;; #### should use `read-command'
|
|
|
1074 (setq val (completing-read (if fn
|
|
|
1075 (format "Where is command (default %s): " fn)
|
|
|
1076 "Where is command: ")
|
|
|
1077 obarray 'commandp t nil
|
|
|
1078 'read-command-history))
|
|
|
1079 (list (if (equal val "")
|
|
|
1080 fn (intern val)))))
|
|
|
1081 (let ((keys (where-is-internal definition)))
|
|
|
1082 (if keys
|
|
|
1083 (message "%s is on %s" definition
|
|
|
1084 (mapconcat 'key-description
|
|
|
1085 (sort keys #'(lambda (x y)
|
|
|
1086 (< (length x) (length y))))
|
|
|
1087 ", "))
|
|
|
1088 (message "%s is not on any keys" definition)))
|
|
|
1089 nil)
|
|
|
1090
|
|
|
1091 (defun locate-library (library &optional nosuffix)
|
|
|
1092 "Show the full path name of XEmacs library LIBRARY.
|
|
|
1093 This command searches the directories in `load-path' like `M-x load-library'
|
|
|
1094 to find the file that `M-x load-library RET LIBRARY RET' would load.
|
|
|
1095 Optional second arg NOSUFFIX non-nil means don't add suffixes `.elc' or `.el'
|
|
|
1096 to the specified name LIBRARY (a la calling `load' instead of `load-library')."
|
|
|
1097 (interactive "sLocate library: \nP")
|
|
|
1098 ;; XEmacs: We have the nifty `locate-file' so we use it.
|
|
|
1099 (let ((file (locate-file library load-path (if nosuffix nil ".elc:.el:"))))
|
|
4
|
1100 (when (interactive-p)
|
|
|
1101 (if file
|
|
|
1102 (message "Library is file %s" file)
|
|
|
1103 (message "No library %s in search path" library)))
|
|
0
|
1104 file))
|
|
|
1105
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1106 ;; Functions ported from C into Lisp in XEmacs
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1107
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1108 (defun describe-syntax ()
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1109 "Describe the syntax specifications in the syntax table.
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1110 The descriptions are inserted in a buffer, which is then displayed."
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1111 (interactive)
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1112 (with-displaying-help-buffer
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1113 (lambda ()
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1114 ;; defined in syntax.el
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1115 (describe-syntax-table (syntax-table) standard-output))))
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1116
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1117 (defun list-processes ()
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1118 "Display a list of all processes.
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1119 \(Any processes listed as Exited or Signaled are actually eliminated
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1120 after the listing is made.)"
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1121 (interactive)
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1122 (with-output-to-temp-buffer "*Process List*"
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1123 (set-buffer standard-output)
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1124 (buffer-disable-undo standard-output)
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1125 (make-local-variable 'truncate-lines)
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1126 (setq truncate-lines t)
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1127 (let ((stream standard-output))
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1128 ;; 00000000001111111111222222222233333333334444444444
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1129 ;; 01234567890123456789012345678901234567890123456789
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1130 ;; rewritten for I18N3. This one should stay rewritten
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1131 ;; so that the dashes will line up properly.
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1132 (princ "Proc Status Buffer Tty Command\n---- ------ ------ --- -------\n" stream)
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1133 (let ((tail (process-list)))
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1134 (while tail
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1135 (let* ((p (car tail))
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1136 (pid (process-id p))
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1137 (s (process-status p)))
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1138 (setq tail (cdr tail))
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1139 (princ (format "%-13s" (process-name p)) stream)
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1140 ;(if (and (eq system-type 'vax-vms)
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1141 ; (eq s 'signal)
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1142 ; (< (process-exit-status p) NSIG))
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1143 ; (princ (aref sys_errlist (process-exit-status p)) stream))
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1144 (princ s stream)
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1145 (if (and (eq s 'exit) (/= (process-exit-status p) 0))
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1146 (princ (format " %d" (process-exit-status p)) stream))
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1147 (if (memq s '(signal exit closed))
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1148 ;; Do delete-exited-processes' work
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1149 (delete-process p))
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1150 (indent-to 22 1) ;####
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1151 (let ((b (process-buffer p)))
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1152 (cond ((not b)
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1153 (princ "(none)" stream))
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1154 ((not (buffer-name b))
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1155 (princ "(killed)" stream))
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1156 (t
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1157 (princ (buffer-name b) stream))))
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1158 (indent-to 37 1) ;####
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1159 (let ((tn (process-tty-name p)))
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1160 (cond ((not tn)
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1161 (princ "(none)" stream))
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1162 (t
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1163 (princ (format "%s" tn) stream))))
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1164 (indent-to 49 1) ;####
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1165 (if (not (integerp pid))
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1166 (progn
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1167 (princ "network stream connection " stream)
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1168 (princ (car pid) stream)
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1169 (princ "@" stream)
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1170 (princ (cdr pid) stream))
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1171 (let ((cmd (process-command p)))
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1172 (while cmd
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1173 (princ (car cmd) stream)
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1174 (setq cmd (cdr cmd))
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1175 (if cmd (princ " " stream)))))
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1176 (terpri stream)))))))
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