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428
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1 ;;; apropos.el --- apropos commands for users and programmers.
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2
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3 ;; Copyright (C) 1989, 1994, 1995 Free Software Foundation, Inc.
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4
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5 ;; Author: Joe Wells <jbw@bigbird.bu.edu>
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6 ;; Rewritten: Daniel.Pfeiffer@Informatik.START.dbp.de, fax (+49 69) 7588-2389
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7 ;; Maintainer: SL Baur <steve@xemacs.org>
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8 ;; Keywords: help
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9
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10 ;; This file is part of XEmacs.
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11
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12 ;; XEmacs is free software; you can redistribute it and/or modify it
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13 ;; under the terms of the GNU General Public License as published by
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14 ;; the Free Software Foundation; either version 2, or (at your option)
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15 ;; any later version.
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16
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17 ;; XEmacs is distributed in the hope that it will be useful, but
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18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 ;; General Public License for more details.
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21
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22 ;; You should have received a copy of the GNU General Public License
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613
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23 ;; along with XEmacs; see the file COPYING. If not, write to the
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428
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24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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25 ;; Boston, MA 02111-1307, USA.
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26
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27 ;;; Synched up with: Last synched with FSF 19.34, diverged since.
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28
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29 ;;; Commentary:
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30
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31 ;; The ideas for this package were derived from the C code in
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32 ;; src/keymap.c and elsewhere. The functions in this file should
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33 ;; always be byte-compiled for speed. Someone should rewrite this in
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34 ;; C (as part of src/keymap.c) for speed.
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35
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36 ;; The idea for super-apropos is based on the original implementation
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37 ;; by Lynn Slater <lrs@esl.com>.
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38
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39 ;;; ChangeLog:
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40
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41 ;; Fixed bug, current-local-map can return nil.
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42 ;; Change, doesn't calculate key-bindings unless needed.
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43 ;; Added super-apropos capability, changed print functions.
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44 ;;; Made fast-apropos and super-apropos share code.
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45 ;;; Sped up fast-apropos again.
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46 ;; Added apropos-do-all option.
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47 ;;; Added fast-command-apropos.
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48 ;; Changed doc strings to comments for helping functions.
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49 ;;; Made doc file buffer read-only, buried it.
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50 ;; Only call substitute-command-keys if do-all set.
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51
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52 ;; Optionally use configurable faces to make the output more legible.
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53 ;; Differentiate between command, function and macro.
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54 ;; Apropos-command (ex command-apropos) does cmd and optionally user var.
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55 ;; Apropos shows all 3 aspects of symbols (fn, var and plist)
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56 ;; Apropos-documentation (ex super-apropos) now finds all it should.
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57 ;; New apropos-value snoops through all values and optionally plists.
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58 ;; Reading DOC file doesn't load nroff.
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59 ;; Added hypertext following of documentation, mouse-2 on variable gives value
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60 ;; from buffer in active window.
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61
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62 ;;; Code:
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63
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64 ;; I see a degradation of maybe 10-20% only.
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65 ;; [sb -- FSF protects the face declarations with `if window-system'
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66 ;; I see no reason why we should do so]
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67 (defvar apropos-do-all nil
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68 "*Whether the apropos commands should do more.
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69 Slows them down more or less. Set this non-nil if you have a fast machine.")
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70
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71 ;; XEmacs addition
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502
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72 (defvar apropos-symbol-face (if-boundp 'font-lock-keyword-face
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428
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73 font-lock-keyword-face
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74 'bold)
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75 "*Face for symbol name in apropos output or `nil'.
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76 This looks good, but slows down the commands several times.")
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77
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78 ;; XEmacs addition
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502
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79 (defvar apropos-keybinding-face (if-boundp 'font-lock-string-face
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428
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80 font-lock-string-face
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81 'underline)
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82 "*Face for keybinding display in apropos output or `nil'.
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83 This looks good, but slows down the commands several times.")
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84
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85 ;; XEmacs addition
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502
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86 (defvar apropos-label-face (if-boundp 'font-lock-comment-face
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428
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87 font-lock-comment-face
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88 'italic)
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89 "*Face for label (Command, Variable ...) in apropos output or `nil'.
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90 If this is `nil' no mouse highlighting occurs.
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91 This looks good, but slows down the commands several times.
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92 When this is a face name, as it is initially, it gets transformed to a
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93 text-property list for efficiency.")
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94
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95 ;; XEmacs addition
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502
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96 (defvar apropos-property-face (if-boundp 'font-lock-variable-name-face
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428
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97 font-lock-variable-name-face
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98 'bold-italic)
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99 "*Face for property name in apropos output or `nil'.
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100 This looks good, but slows down the commands several times.")
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101
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102 (defvar apropos-match-face 'secondary-selection
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103 "*Face for matching part in apropos-documentation/value output or `nil'.
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104 This looks good, but slows down the commands several times.")
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105
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106
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107 (defvar apropos-mode-map
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108 (let ((map (make-sparse-keymap)))
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109 (define-key map [(control m)] 'apropos-follow)
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430
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110 (define-key map [return] 'apropos-follow)
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428
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111 (define-key map [(button2up)] 'apropos-mouse-follow)
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112 (define-key map [(button2)] 'undefined)
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113 map)
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114 "Keymap used in Apropos mode.")
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115
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116
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117 (defvar apropos-regexp nil
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118 "Regexp used in current apropos run.")
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119
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120 (defvar apropos-files-scanned ()
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121 "List of elc files already scanned in current run of `apropos-documentation'.")
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122
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123 (defvar apropos-accumulator ()
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124 "Alist of symbols already found in current apropos run.")
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125
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126 (defvar apropos-item ()
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127 "Current item in or for apropos-accumulator.")
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128
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129 (defvar apropos-mode-hook nil) ; XEmacs
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130
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131 (defun apropos-mode ()
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132 "Major mode for following hyperlinks in output of apropos commands.
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133
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134 \\{apropos-mode-map}"
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135 (interactive)
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136 (kill-all-local-variables)
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137 (use-local-map apropos-mode-map)
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138 (setq major-mode 'apropos-mode
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139 mode-name "Apropos")
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140 (run-hooks 'apropos-mode-hook)) ; XEmacs
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141
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142
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143 ;; For auld lang syne:
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144 ;;;###autoload
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145 (fset 'command-apropos 'apropos-command)
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146
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147 ;;;###autoload
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148 (defun apropos-command (apropos-regexp &optional do-all)
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149 "Shows commands (interactively callable functions) that match REGEXP.
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150 With optional prefix ARG or if `apropos-do-all' is non-nil, also show
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151 variables."
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152 ;; XEmacs: All code related to special treatment of buffer has been removed
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153 (interactive (list (read-string (concat "Apropos command "
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154 (if (or current-prefix-arg
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155 apropos-do-all)
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156 "or variable ")
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157 "(regexp): "))
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158 current-prefix-arg))
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159 (or do-all (setq do-all apropos-do-all))
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160 (setq apropos-accumulator
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161 (apropos-internal apropos-regexp
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162 (if do-all
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163 (lambda (symbol) (or (commandp symbol)
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164 (user-variable-p symbol)))
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165 'commandp)))
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166 (apropos-print
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167 t
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168 (lambda (p)
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169 (let (doc symbol)
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170 (while p
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171 (setcar p (list
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172 (setq symbol (car p))
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173 (if (commandp symbol)
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174 (if (setq doc
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175 ;; XEmacs change: if obsolete,
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176 ;; only mention that.
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177 (or (function-obsoleteness-doc symbol)
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178 (documentation symbol t)))
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179 (substring doc 0 (string-match "\n" doc))
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180 "(not documented)"))
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181 (and do-all
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182 (user-variable-p symbol)
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183 (if (setq doc
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184 (or
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185 ;; XEmacs change: if obsolete,
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186 ;; only mention that.
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187 (variable-obsoleteness-doc symbol)
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188 (documentation-property
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189 symbol 'variable-documentation t)))
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190 (substring doc 0
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191 (string-match "\n" doc))))))
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192 (setq p (cdr p)))))
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193 nil))
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194
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195
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196 ;;;###autoload
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197 (defun apropos (apropos-regexp &optional do-all)
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198 "Show all bound symbols whose names match REGEXP.
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199 With optional prefix ARG or if `apropos-do-all' is non-nil, also show unbound
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200 symbols and key bindings, which is a little more time-consuming.
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201 Returns list of symbols and documentation found."
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202 (interactive "sApropos symbol (regexp): \nP")
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203 ;; XEmacs change: hitting ENTER by mistake is a common mess-up and
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204 ;; shouldn't make Emacs hang for a long time trying to list all symbols.
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205 (or (> (length apropos-regexp) 0)
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206 (error "Must pass non-empty regexp to `apropos'"))
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207 (setq apropos-accumulator
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208 (apropos-internal apropos-regexp
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209 (and (not do-all)
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210 (not apropos-do-all)
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211 (lambda (symbol)
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212 (or (fboundp symbol)
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213 (boundp symbol)
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214 (find-face symbol)
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215 (symbol-plist symbol))))))
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216 (apropos-print
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217 (or do-all apropos-do-all)
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218 (lambda (p)
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219 (let (symbol doc)
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220 (while p
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221 (setcar p (list
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222 (setq symbol (car p))
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223 (if (fboundp symbol)
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224 (if (setq doc
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225 ;; XEmacs change: if obsolete,
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226 ;; only mention that.
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227 (or (function-obsoleteness-doc symbol)
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228 (documentation symbol t)))
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229 (substring doc 0 (string-match "\n" doc))
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230 "(not documented)"))
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231 (if (boundp symbol)
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232 (if (setq doc
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233 (or
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234 ;; XEmacs change: if obsolete,
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235 ;; only mention that.
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236 (variable-obsoleteness-doc symbol)
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237 (documentation-property
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238 symbol 'variable-documentation t)))
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239 (substring doc 0
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240 (string-match "\n" doc))
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241 "(not documented)"))
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242 (if (setq doc (symbol-plist symbol))
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243 (if (eq (/ (length doc) 2) 1)
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244 (format "1 property (%s)" (car doc))
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245 (format "%d properties" (/ (length doc) 2))))
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246 (if (get symbol 'widget-type)
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247 (if (setq doc (documentation-property
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248 symbol 'widget-documentation t))
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249 (substring doc 0
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250 (string-match "\n" doc))
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251 "(not documented)"))
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252 (if (find-face symbol)
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253 (if (setq doc (face-doc-string symbol))
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254 (substring doc 0
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255 (string-match "\n" doc))
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256 "(not documented)"))
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257 (when (get symbol 'custom-group)
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258 (if (setq doc (documentation-property
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259 symbol 'group-documentation t))
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260 (substring doc 0
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261 (string-match "\n" doc))
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262 "(not documented)"))))
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263 (setq p (cdr p)))))
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264 nil))
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265
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266
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267 ;;;###autoload
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268 (defun apropos-value (apropos-regexp &optional do-all)
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269 "Show all symbols whose value's printed image matches REGEXP.
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270 With optional prefix ARG or if `apropos-do-all' is non-nil, also looks
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271 at the function and at the names and values of properties.
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272 Returns list of symbols and values found."
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273 (interactive "sApropos value (regexp): \nP")
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274 (or do-all (setq do-all apropos-do-all))
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275 (setq apropos-accumulator ())
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276 (let (f v p)
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277 (mapatoms
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278 (lambda (symbol)
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279 (setq f nil v nil p nil)
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280 (or (memq symbol '(apropos-regexp do-all apropos-accumulator
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281 symbol f v p))
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282 (setq v (apropos-value-internal 'boundp symbol 'symbol-value)))
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283 (if do-all
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284 (setq f (apropos-value-internal 'fboundp symbol 'symbol-function)
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285 p (apropos-format-plist symbol "\n " t)))
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286 (if (or f v p)
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287 (setq apropos-accumulator (cons (list symbol f v p)
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288 apropos-accumulator))))))
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289 (apropos-print nil nil t))
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290
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291
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292 ;;;###autoload
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293 (defun apropos-documentation (apropos-regexp &optional do-all)
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294 "Show symbols whose documentation contain matches for REGEXP.
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295 With optional prefix ARG or if `apropos-do-all' is non-nil, also use
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296 documentation that is not stored in the documentation file and show key
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297 bindings.
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298 Returns list of symbols and documentation found."
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299 (interactive "sApropos documentation (regexp): \nP")
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300 (or do-all (setq do-all apropos-do-all))
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301 (setq apropos-accumulator () apropos-files-scanned ())
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302 (let ((standard-input (get-buffer-create " apropos-temp"))
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303 f v)
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304 (unwind-protect
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305 (save-excursion
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306 (set-buffer standard-input)
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307 (apropos-documentation-check-doc-file)
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308 (if do-all
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309 (mapatoms
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310 (lambda (symbol)
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311 (setq f (apropos-safe-documentation symbol)
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312 v (get symbol 'variable-documentation))
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313 (when (integerp v) (setq v nil))
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314 (setq f (apropos-documentation-internal f)
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315 v (apropos-documentation-internal v))
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316 (if (or f v)
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317 (if (setq apropos-item
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318 (cdr (assq symbol apropos-accumulator)))
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319 (progn
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320 (if f
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321 (setcar apropos-item f))
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322 (if v
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323 (setcar (cdr apropos-item) v)))
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324 (setq apropos-accumulator
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325 (cons (list symbol f v)
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326 apropos-accumulator)))))))
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327 (apropos-print nil nil t))
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328 (kill-buffer standard-input))))
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329
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330
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331 (defun apropos-value-internal (predicate symbol function)
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332 (if (funcall predicate symbol)
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333 (progn
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334 (setq symbol (prin1-to-string (funcall function symbol)))
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335 (if (string-match apropos-regexp symbol)
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336 (progn
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337 (if apropos-match-face
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338 (put-text-property (match-beginning 0) (match-end 0)
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339 'face apropos-match-face
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340 symbol))
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341 symbol)))))
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342
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343 (defun apropos-documentation-internal (doc)
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344 (if (consp doc)
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345 (apropos-documentation-check-elc-file (car doc))
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346 (and doc
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347 (string-match apropos-regexp doc)
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348 (progn
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349 (if apropos-match-face
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350 (put-text-property (match-beginning 0)
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351 (match-end 0)
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352 'face apropos-match-face
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353 (setq doc (copy-sequence doc))))
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354 doc))))
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355
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356 (defun apropos-format-plist (pl sep &optional compare)
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357 (setq pl (symbol-plist pl))
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358 (let (p p-out)
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359 (while pl
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360 (setq p (format "%s %S" (car pl) (nth 1 pl)))
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361 (if (or (not compare) (string-match apropos-regexp p))
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362 (if apropos-property-face
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363 (put-text-property 0 (length (symbol-name (car pl)))
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364 'face apropos-property-face p))
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365 (setq p nil))
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366 (if p
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367 (progn
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368 (and compare apropos-match-face
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369 (put-text-property (match-beginning 0) (match-end 0)
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370 'face apropos-match-face
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371 p))
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372 (setq p-out (concat p-out (if p-out sep) p))))
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373 (setq pl (nthcdr 2 pl)))
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374 p-out))
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375
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376
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377 ;; Finds all documentation related to APROPOS-REGEXP in internal-doc-file-name.
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378
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379 (defun apropos-documentation-check-doc-file ()
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444
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380 (let (type symbol (sepa 2) sepb start end doc)
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428
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381 (insert ?\^_)
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382 (backward-char)
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383 (insert-file-contents (concat doc-directory internal-doc-file-name))
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384 (forward-char)
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385 (while (save-excursion
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386 (setq sepb (search-forward "\^_"))
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387 (not (eobp)))
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388 (beginning-of-line 2)
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389 (if (save-restriction
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390 (narrow-to-region (point) (1- sepb))
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391 (re-search-forward apropos-regexp nil t))
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392 (progn
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444
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393 (setq start (match-beginning 0)
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428
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394 end (point))
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395 (goto-char (1+ sepa))
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396 (or (setq type (if (eq ?F (preceding-char))
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397 1 ; function documentation
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398 2) ; variable documentation
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399 symbol (read)
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444
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400 start (- start (point) 1)
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428
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401 end (- end (point) 1)
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402 doc (buffer-substring (1+ (point)) (1- sepb))
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403 apropos-item (assq symbol apropos-accumulator))
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404 (setq apropos-item (list symbol nil nil)
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405 apropos-accumulator (cons apropos-item
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406 apropos-accumulator)))
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407 (if apropos-match-face
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444
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408 (put-text-property start end 'face apropos-match-face doc))
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428
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409 (setcar (nthcdr type apropos-item) doc)))
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410 (setq sepa (goto-char sepb)))))
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411
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412 (defun apropos-documentation-check-elc-file (file)
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413 (if (member file apropos-files-scanned)
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414 nil
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444
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415 (let (symbol doc start end this-is-a-variable)
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428
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416 (setq apropos-files-scanned (cons file apropos-files-scanned))
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417 (erase-buffer)
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418 (insert-file-contents file)
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419 (while (search-forward "\n#@" nil t)
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420 ;; Read the comment length, and advance over it.
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421 (setq end (read)
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444
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422 start (1+ (point))
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428
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423 end (+ (point) end -1))
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424 (forward-char)
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425 (if (save-restriction
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426 ;; match ^ and $ relative to doc string
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444
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427 (narrow-to-region start end)
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428
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428 (re-search-forward apropos-regexp nil t))
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429 (progn
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430 (goto-char (+ end 2))
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444
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431 (setq doc (buffer-substring start end)
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432 end (- (match-end 0) start)
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433 start (- (match-beginning 0) start)
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428
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434 this-is-a-variable (looking-at "(def\\(var\\|const\\) ")
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435 symbol (progn
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436 (skip-chars-forward "(a-z")
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437 (forward-char)
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438 (read))
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439 symbol (if (consp symbol)
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440 (nth 1 symbol)
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441 symbol))
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442 (if (if this-is-a-variable
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443 (get symbol 'variable-documentation)
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444 (and (fboundp symbol) (apropos-safe-documentation symbol)))
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445 (progn
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446 (or (setq apropos-item (assq symbol apropos-accumulator))
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447 (setq apropos-item (list symbol nil nil)
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448 apropos-accumulator (cons apropos-item
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449 apropos-accumulator)))
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450 (if apropos-match-face
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444
|
451 (put-text-property start end 'face apropos-match-face
|
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428
|
452 doc))
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453 (setcar (nthcdr (if this-is-a-variable 2 1)
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454 apropos-item)
|
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455 doc)))))))))
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456
|
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457
|
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458
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459 (defun apropos-safe-documentation (function)
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460 "Like documentation, except it avoids calling `get_doc_string'.
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461 Will return nil instead."
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462 (while (and function (symbolp function))
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463 (setq function (if (fboundp function)
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464 (symbol-function function))))
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465 (if (eq (car-safe function) 'macro)
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466 (setq function (cdr function)))
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|
467 ;; XEmacs change from: (setq function (if (byte-code-function-p function)
|
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|
468 (setq function (if (compiled-function-p function)
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469 (if (fboundp 'compiled-function-doc-string)
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|
470 (compiled-function-doc-string function)
|
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471 (if (> (length function) 4)
|
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|
472 (aref function 4)))
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473 (if (eq (car-safe function) 'autoload)
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474 (nth 2 function)
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475 (if (eq (car-safe function) 'lambda)
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476 (if (stringp (nth 2 function))
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477 (nth 2 function)
|
|
|
478 (if (stringp (nth 3 function))
|
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|
479 (nth 3 function)))))))
|
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|
480 (if (integerp function)
|
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|
481 nil
|
|
|
482 function))
|
|
|
483
|
|
|
484
|
|
|
485
|
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|
486 (defun apropos-print (do-keys doc-fn spacing)
|
|
|
487 "Output result of various apropos commands with `apropos-regexp'.
|
|
|
488 APROPOS-ACCUMULATOR is a list. Optional DOC-FN is called for each element
|
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489 of apropos-accumulator and may modify it resulting in (symbol fn-doc
|
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490 var-doc [plist-doc]). Returns sorted list of symbols and documentation
|
|
|
491 found."
|
|
|
492 (if (null apropos-accumulator)
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|
493 (message "No apropos matches for `%s'" apropos-regexp)
|
|
|
494 (if doc-fn
|
|
|
495 (funcall doc-fn apropos-accumulator))
|
|
|
496 (setq apropos-accumulator
|
|
|
497 (sort apropos-accumulator (lambda (a b)
|
|
|
498 (string-lessp (car a) (car b)))))
|
|
|
499 (and apropos-label-face
|
|
|
500 (or (symbolp apropos-label-face)
|
|
|
501 (facep apropos-label-face)) ; XEmacs
|
|
|
502 (setq apropos-label-face `(face ,apropos-label-face
|
|
|
503 mouse-face highlight)))
|
|
|
504 (let ((help-buffer-prefix-string "Apropos"))
|
|
|
505 (with-displaying-help-buffer
|
|
|
506 (lambda ()
|
|
|
507 (with-current-buffer standard-output
|
|
|
508 (run-hooks 'apropos-mode-hook)
|
|
|
509 (let ((p apropos-accumulator)
|
|
|
510 (old-buffer (current-buffer))
|
|
|
511 symbol item point1 point2)
|
|
430
|
512 ;; Mostly useless but to provide better keymap
|
|
|
513 ;; explanation. help-mode-map will be used instead.
|
|
|
514 (use-local-map apropos-mode-map)
|
|
428
|
515 ;; XEmacs change from (if window-system
|
|
|
516 (if (device-on-window-system-p)
|
|
|
517 (progn
|
|
|
518 (princ "If you move the mouse over text that changes color,\n")
|
|
|
519 (princ (substitute-command-keys
|
|
|
520 "you can click \\[apropos-mouse-follow] to get more information.\n"))))
|
|
|
521 (princ (substitute-command-keys
|
|
|
522 "Type \\[apropos-follow] in this buffer to get full documentation.\n\n"))
|
|
|
523 (while (consp p)
|
|
|
524 (or (not spacing) (bobp) (terpri))
|
|
|
525 (setq apropos-item (car p)
|
|
|
526 symbol (car apropos-item)
|
|
|
527 p (cdr p)
|
|
|
528 point1 (point))
|
|
|
529 (princ symbol) ; print symbol name
|
|
|
530 (setq point2 (point))
|
|
|
531 ;; Calculate key-bindings if we want them.
|
|
|
532 (and do-keys
|
|
|
533 (commandp symbol)
|
|
|
534 (indent-to 30 1)
|
|
|
535 (if (let ((keys
|
|
|
536 (save-excursion
|
|
|
537 (set-buffer old-buffer)
|
|
|
538 (where-is-internal symbol)))
|
|
|
539 filtered)
|
|
|
540 ;; Copy over the list of key sequences,
|
|
|
541 ;; omitting any that contain a buffer or a frame.
|
|
|
542 (while keys
|
|
|
543 (let ((key (car keys))
|
|
|
544 (i 0)
|
|
|
545 loser)
|
|
|
546 (while (< i (length key))
|
|
|
547 (if (or (framep (aref key i))
|
|
|
548 (bufferp (aref key i)))
|
|
|
549 (setq loser t))
|
|
|
550 (setq i (1+ i)))
|
|
|
551 (or loser
|
|
|
552 (setq filtered (cons key filtered))))
|
|
|
553 (setq keys (cdr keys)))
|
|
|
554 (setq item filtered))
|
|
|
555 ;; Convert the remaining keys to a string and insert.
|
|
|
556 (princ
|
|
|
557 (mapconcat
|
|
|
558 (lambda (key)
|
|
|
559 (setq key (key-description key))
|
|
|
560 (if apropos-keybinding-face
|
|
|
561 (put-text-property 0 (length key)
|
|
|
562 'face apropos-keybinding-face
|
|
|
563 key))
|
|
|
564 key)
|
|
|
565 item ", "))
|
|
|
566 (princ "Type ")
|
|
|
567 (princ "M-x")
|
|
|
568 (put-text-property (- (point) 3) (point)
|
|
|
569 'face apropos-keybinding-face)
|
|
|
570 (princ (format " %s " (symbol-name symbol)))
|
|
|
571 (princ "RET")
|
|
|
572 (put-text-property (- (point) 3) (point)
|
|
|
573 'face apropos-keybinding-face)))
|
|
|
574 (terpri)
|
|
|
575 ;; only now so we don't propagate text attributes all over
|
|
|
576 (put-text-property point1 point2 'item
|
|
|
577 (if (eval `(or ,@(cdr apropos-item)))
|
|
|
578 (car apropos-item)
|
|
|
579 apropos-item))
|
|
|
580 (if apropos-symbol-face
|
|
|
581 (put-text-property point1 point2 'face apropos-symbol-face))
|
|
430
|
582 ;; Add text-property on symbol, too.
|
|
|
583 (put-text-property point1 point2 'keymap apropos-mode-map)
|
|
428
|
584 (apropos-print-doc 'describe-function 1
|
|
|
585 (if (commandp symbol)
|
|
|
586 "Command"
|
|
|
587 (if (apropos-macrop symbol)
|
|
|
588 "Macro"
|
|
|
589 "Function"))
|
|
|
590 do-keys)
|
|
|
591 (if (get symbol 'custom-type)
|
|
|
592 (apropos-print-doc 'customize-variable-other-window 2
|
|
|
593 "User Option" do-keys)
|
|
|
594 (apropos-print-doc 'describe-variable 2
|
|
|
595 "Variable" do-keys))
|
|
|
596 (apropos-print-doc 'customize-other-window 6 "Group" do-keys)
|
|
|
597 (apropos-print-doc 'customize-face-other-window 5 "Face" do-keys)
|
|
|
598 (apropos-print-doc 'widget-browse-other-window 4 "Widget" do-keys)
|
|
|
599 (apropos-print-doc 'apropos-describe-plist 3
|
|
|
600 "Plist" nil)))))
|
|
|
601 apropos-regexp))
|
|
|
602 (prog1 apropos-accumulator
|
|
|
603 (setq apropos-accumulator ())))) ; permit gc
|
|
|
604
|
|
|
605
|
|
|
606 (defun apropos-macrop (symbol)
|
|
|
607 "Return t if SYMBOL is a Lisp macro."
|
|
|
608 (and (fboundp symbol)
|
|
|
609 (consp (setq symbol
|
|
|
610 (symbol-function symbol)))
|
|
|
611 (or (eq (car symbol) 'macro)
|
|
|
612 (if (eq (car symbol) 'autoload)
|
|
|
613 (memq (nth 4 symbol)
|
|
|
614 '(macro t))))))
|
|
|
615
|
|
|
616
|
|
|
617 (defun apropos-print-doc (action i str do-keys)
|
|
|
618 (with-current-buffer standard-output
|
|
|
619 (if (stringp (setq i (nth i apropos-item)))
|
|
|
620 (progn
|
|
|
621 (insert " ")
|
|
|
622 (put-text-property (- (point) 2) (1- (point))
|
|
|
623 'action action)
|
|
|
624 (insert str ": ")
|
|
|
625 (if apropos-label-face
|
|
|
626 (add-text-properties (- (point) (length str) 2)
|
|
|
627 (1- (point))
|
|
|
628 apropos-label-face))
|
|
|
629 (add-text-properties (- (point) (length str) 2)
|
|
|
630 (1- (point))
|
|
|
631 (list 'keymap apropos-mode-map))
|
|
|
632 (insert (if do-keys (substitute-command-keys i) i))
|
|
|
633 (or (bolp) (terpri))))))
|
|
|
634
|
|
|
635 (defun apropos-mouse-follow (event)
|
|
|
636 (interactive "e")
|
|
|
637 ;; XEmacs change: We're using the standard help buffer code now, don't
|
|
|
638 ;; do special tricks about trying to preserve current-buffer about mouse
|
|
|
639 ;; clicks.
|
|
|
640
|
|
|
641 (save-excursion
|
|
|
642 ;; XEmacs change from:
|
|
|
643 ;; (set-buffer (window-buffer (posn-window (event-start event))))
|
|
|
644 ;; (goto-char (posn-point (event-start event)))
|
|
|
645 (set-buffer (event-buffer event))
|
|
|
646 (goto-char (event-closest-point event))
|
|
|
647 ;; XEmacs change: following code seems useless
|
|
|
648 ;;(or (and (not (eobp)) (get-text-property (point) 'mouse-face))
|
|
|
649 ;; (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face))
|
|
|
650 ;; (error "There is nothing to follow here"))
|
|
|
651 (apropos-follow)))
|
|
|
652
|
|
|
653
|
|
|
654 (defun apropos-follow (&optional other)
|
|
|
655 (interactive)
|
|
|
656 (let* (;; Properties are always found at the beginning of the line.
|
|
|
657 (bol (save-excursion (beginning-of-line) (point)))
|
|
|
658 ;; If there is no `item' property here, look behind us.
|
|
|
659 (item (get-text-property bol 'item))
|
|
|
660 (item-at (if item nil (previous-single-property-change bol 'item)))
|
|
|
661 ;; Likewise, if there is no `action' property here, look in front.
|
|
|
662 (action (get-text-property bol 'action))
|
|
|
663 (action-at (if action nil (next-single-property-change bol 'action))))
|
|
|
664 (and (null item) item-at
|
|
|
665 (setq item (get-text-property (1- item-at) 'item)))
|
|
|
666 (and (null action) action-at
|
|
|
667 (setq action (get-text-property action-at 'action)))
|
|
|
668 (if (not (and item action))
|
|
|
669 (error "There is nothing to follow here"))
|
|
|
670 (if (consp item) (error "There is nothing to follow in `%s'" (car item)))
|
|
|
671 (if other (set-buffer other))
|
|
|
672 (funcall action item)))
|
|
|
673
|
|
|
674
|
|
|
675
|
|
|
676 (defun apropos-describe-plist (symbol)
|
|
|
677 "Display a pretty listing of SYMBOL's plist."
|
|
|
678 (let ((help-buffer-prefix-string "Apropos-plist"))
|
|
|
679 (with-displaying-help-buffer
|
|
|
680 (lambda ()
|
|
|
681 (run-hooks 'apropos-mode-hook)
|
|
|
682 (princ "Symbol ")
|
|
|
683 (prin1 symbol)
|
|
|
684 (princ "'s plist is\n (")
|
|
|
685 (with-current-buffer standard-output
|
|
|
686 (if apropos-symbol-face
|
|
|
687 (put-text-property 8 (- (point) 14) 'face apropos-symbol-face)))
|
|
|
688 (princ (apropos-format-plist symbol "\n "))
|
|
|
689 (princ ")")
|
|
|
690 (terpri)
|
|
|
691 (print-help-return-message))
|
|
|
692 (symbol-name symbol))))
|
|
|
693
|
|
|
694 (provide 'apropos) ; XEmacs
|
|
|
695
|
|
|
696 ;;; apropos.el ends here
|
