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1 ;;; finder.el --- topic & keyword-based code finder
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2
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3 ;; Copyright (C) 1992 Free Software Foundation, Inc.
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4
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5 ;; Author: Eric S. Raymond <esr@snark.thyrsus.com>
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6 ;; Created: 16 Jun 1992
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7 ;; Version: 1.0
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8 ;; Keywords: help
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9 ;; X-Modified-by: Bob Weiner <weiner@mot.com>, 4/18/95, to include Lisp
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10 ;; library directory names in finder-program-info, for fast display of
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11 ;; Lisp libraries and associated commentaries. Added {v}, finder-view,
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12 ;; and {e}, finder-edit commands for displaying libraries.
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13 ;;
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14 ;; Added user variable, 'finder-abbreviate-directory-list', used to
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15 ;; abbreviate directories before they are saved to finder-program-info.
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16 ;; Such relative directories can be portable from one Emacs installation
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17 ;; to another. Default value is based upon the value of Emacs'
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18 ;; data-directory variable.
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19
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20 ;; This file is part of XEmacs.
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21
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22 ;; XEmacs is free software; you can redistribute it and/or modify it
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23 ;; under the terms of the GNU General Public License as published by
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24 ;; the Free Software Foundation; either version 2, or (at your option)
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25 ;; any later version.
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26
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27 ;; XEmacs is distributed in the hope that it will be useful, but
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28 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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29 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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30 ;; General Public License for more details.
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31
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32 ;; You should have received a copy of the GNU General Public License
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33 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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34 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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35 ;; 02111-1307, USA.
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36
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37 ;;; Synched up with: FSF 19.34.
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38
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39 ;;; Commentary:
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40
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41 ;; This mode uses the Keywords library header to provide code-finding
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42 ;; services by keyword.
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43 ;;
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44 ;; Things to do:
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45 ;; 1. Support multiple keywords per search. This could be extremely hairy;
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46 ;; there doesn't seem to be any way to get completing-read to exit on
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47 ;; an EOL with no substring pending, which is what we'd want to end the loop.
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48 ;; 2. Search by string in synopsis line?
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49 ;; 3. Function to check finder-package-info for unknown keywords.
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50
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51 ;;; Code:
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52
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53 (require 'lisp-mnt)
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54 (require 'finder-inf)
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2
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55 ;; XEmacs addition
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56 (require 'picture)
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57 (require 'mode-motion)
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58
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59 (defvar finder-emacs-root-directory
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60 (file-name-directory (directory-file-name data-directory))
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61 "Root directory of current emacs tree.")
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62
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63 (defvar finder-abbreviate-directory-list
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64 (list finder-emacs-root-directory)
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65 "*List of directory roots to remove from finder-package-info directory entries.
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66 The first element in the list is used when expanding relative package
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67 directories to view or extract information from package source code.")
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68
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69 (defvar finder-file-regexp "\\.el$"
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70 "Regexp which matches file names but not Emacs Lisp finder keywords.")
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71
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72 ;; Local variable in finder buffer.
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73 (defvar finder-headmark)
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74
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75 (defvar finder-known-keywords
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76 '(
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77 (abbrev . "abbreviation handling, typing shortcuts, macros")
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78 (bib . "code related to the `bib' bibliography processor")
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79 (c . "support for the C language and related languages")
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80 (calendar . "calendar and time management support")
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81 (comm . "communications, networking, remote access to files")
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82 (data . "support editing files of data")
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83 (docs . "support for Emacs documentation")
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84 (emulations . "emulations of other editors")
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85 (extensions . "Emacs Lisp language extensions")
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86 (faces . "support for multiple fonts")
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87 (frames . "support for Emacs frames and window systems")
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88 (games . "games, jokes and amusements")
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89 (hardware . "support for interfacing with exotic hardware")
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90 (help . "support for on-line help systems")
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91 (hypermedia . "support for links between text or other media types")
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92 (i18n . "internationalization and alternate character-set support")
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93 (internal . "code for Emacs internals, build process, defaults")
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94 (languages . "specialized modes for editing programming languages")
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95 (lisp . "Lisp support, including Emacs Lisp")
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96 (local . "code local to your site")
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97 (maint . "maintenance aids for the Emacs development group")
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98 (mail . "modes for electronic-mail handling")
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99 (matching . "various sorts of searching and matching")
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100 (mouse . "mouse support")
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101 (news . "support for netnews reading and posting")
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102 (oop . "support for object-oriented programming")
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103 (outlines . "support for hierarchical outlining")
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104 (processes . "process, subshell, compilation, and job control support")
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105 (terminals . "support for terminal types")
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106 (tex . "code related to the TeX formatter")
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107 (tools . "programming tools")
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108 (unix . "front-ends/assistants for, or emulators of, UNIX features")
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109 (vms . "support code for vms")
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110 (wp . "word processing")
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111 ))
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112
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113 (defvar finder-mode-map nil)
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114 (or finder-mode-map
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115 (let ((map (make-sparse-keymap)))
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116 (define-key map " " 'finder-select)
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117 (define-key map "f" 'finder-select)
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118 (define-key map "\C-m" 'finder-select)
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119 ;; XEmacs changes
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120 (define-key map "e" 'finder-edit)
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121 (define-key map "v" 'finder-view)
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122 (define-key map "?" 'finder-summary)
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123 (define-key map "q" 'finder-exit)
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124 (define-key map "d" 'finder-list-keywords)
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125 ;; XEmacs change
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126 (define-key map [button2] 'finder-mouse-select)
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127 (setq finder-mode-map map)))
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128
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129
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130 ;;; Code for regenerating the keyword list.
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131
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132 (defvar finder-package-info nil
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133 "Assoc list mapping file names to description & keyword lists.")
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134
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135 (defvar finder-compile-keywords-quiet nil
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136 "If non-nil finder-compile-keywords will not print any messages.")
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137
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138 (defun finder-compile-keywords (&rest dirs)
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139 "Regenerate the keywords association list into the file `finder-inf.el'.
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140 Optional arguments are a list of Emacs Lisp directories to compile from; no
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141 arguments compiles from `load-path'."
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142 (save-excursion
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143 ;; XEmacs change
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144 (find-file "finder-inf.el")
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145 (let ((processed nil)
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146 (directory-abbrev-alist
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147 (append
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148 (mapcar (function (lambda (dir) (cons dir "")))
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149 finder-abbreviate-directory-list)
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150 directory-abbrev-alist))
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151 (using-load-path))
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152 (or dirs (setq dirs load-path))
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153 (setq using-load-path (equal dirs load-path))
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154 (erase-buffer)
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155 (insert ";;; finder-inf.el --- keyword-to-package mapping\n")
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156 (insert ";; Keywords: help\n")
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157 (insert ";;; Commentary:\n")
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158 (insert ";; Don't edit this file. It's generated by finder.el\n\n")
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159 (insert ";;; Code:\n")
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160 (insert "\n(setq finder-package-info '(\n")
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161 (mapcar
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162 (function
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163 (lambda (d)
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164 (mapcar
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165 (function
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166 (lambda (f)
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167 (if (not (member f processed))
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168 (let (summary keystart keywords)
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169 (setq processed (cons f processed))
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170 (if (not finder-compile-keywords-quiet)
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171 (message "Processing %s ..." f))
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172 (save-excursion
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173 (set-buffer (get-buffer-create "*finder-scratch*"))
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174 (buffer-disable-undo (current-buffer))
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175 (erase-buffer)
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176 (insert-file-contents (expand-file-name f d))
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177 (setq summary (lm-synopsis)
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178 keywords (lm-keywords)))
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179 (if (not summary)
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180 nil
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181 (insert (format " (\"%s\"\n " f))
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182 (prin1 summary (current-buffer))
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183 (insert "\n ")
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184 (setq keystart (point))
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185 (insert (if keywords (format "(%s)" keywords) "nil"))
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186 (subst-char-in-region keystart (point) ?, ? )
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187 (insert "\n ")
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188 (prin1 (abbreviate-file-name d) (current-buffer))
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189 (insert ")\n"))))))
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190 ;;
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191 ;; Skip null, non-existent or relative pathnames, e.g. "./", if
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192 ;; using load-path, so that they do not interfere with a scan of
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193 ;; library directories only.
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194 (if (and using-load-path
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195 (not (and d (file-name-absolute-p d) (file-exists-p d))))
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196 nil
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197 (setq d (file-name-as-directory (or d ".")))
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198 (directory-files d nil "^[^=].*\\.el$")))))
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199 dirs)
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200 (insert "))\n\n(provide 'finder-inf)\n\n;;; finder-inf.el ends here\n")
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201 (kill-buffer "*finder-scratch*")
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202 (eval-current-buffer) ;; So we get the new keyword list immediately
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203 (basic-save-buffer))))
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204
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205 (defun finder-compile-keywords-make-dist ()
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206 "Regenerate `finder-inf.el' for the Emacs distribution."
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207 (finder-compile-keywords default-directory))
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208
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209 ;;; Now the retrieval code
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210
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211 (defun finder-insert-at-column (column &rest strings)
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212 "Insert list of STRINGS, at column COLUMN."
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213 (if (> (current-column) column) (insert "\n"))
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214 (move-to-column column)
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215 (let ((col (current-column)))
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216 (if (< col column)
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217 (indent-to column)
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218 (if (and (/= col column)
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219 (= (preceding-char) ?\t))
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220 (let (indent-tabs-mode)
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221 (delete-char -1)
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222 (indent-to col)
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223 (move-to-column column)))))
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224 (apply 'insert strings))
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225
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226 (defun finder-list-keywords ()
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227 "Display descriptions of the keywords in the Finder buffer."
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228 (interactive)
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229 (setq buffer-read-only nil)
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230 (erase-buffer)
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231 (mapcar
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232 (lambda (assoc)
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233 (let ((keyword (car assoc)))
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234 (insert (symbol-name keyword))
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235 (finder-insert-at-column 14 (concat (cdr assoc) "\n"))
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236 (cons (symbol-name keyword) keyword)))
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237 finder-known-keywords)
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238 (goto-char (point-min))
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239 (setq finder-headmark (point))
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240 (setq buffer-read-only t)
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241 (set-buffer-modified-p nil)
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242 ;; XEmacs change
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243 (if (not (one-window-p))
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244 (balance-windows))
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245 (finder-summary))
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246
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247 (defun finder-list-matches (key)
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248 (setq buffer-read-only nil)
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249 (erase-buffer)
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250 (let ((id (intern key)))
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251 (insert
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252 "The following packages match the keyword `" key "':\n\n")
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253 (setq finder-headmark (point))
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254 (mapcar
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255 (lambda (x)
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256 (if (memq id (car (cdr (cdr x))))
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257 (progn
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258 (insert (car x))
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259 (finder-insert-at-column 16 (concat (car (cdr x)) "\n")))))
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260 finder-package-info)
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261 (goto-char (point-min))
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262 (forward-line)
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263 (setq buffer-read-only t)
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264 (set-buffer-modified-p nil)
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265 (shrink-window-if-larger-than-buffer)
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266 (finder-summary)))
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267
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268 ;; Search for a file named FILE the same way `load' would search.
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269 (defun finder-find-library (file)
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270 (if (file-name-absolute-p file)
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271 file
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272 (let ((dirs load-path)
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273 found)
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274 (while (and dirs (not found))
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275 (if (file-exists-p (expand-file-name (concat file ".el") (car dirs)))
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276 (setq found (expand-file-name file (car dirs)))
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277 (if (file-exists-p (expand-file-name file (car dirs)))
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278 (setq found (expand-file-name file (car dirs)))))
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279 (setq dirs (cdr dirs)))
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280 found)))
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281
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282 (defun finder-commentary (file)
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283 (interactive)
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284 (let* ((str (lm-commentary (finder-find-library file))))
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285 (if (null str)
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286 (error "Can't find any Commentary section"))
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287 (pop-to-buffer "*Finder*")
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288 ;; XEmacs change
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289 (setq buffer-read-only nil
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290 mode-motion-hook 'mode-motion-highlight-line)
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291 (erase-buffer)
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292 (insert str)
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293 (goto-char (point-min))
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294 (delete-blank-lines)
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295 (goto-char (point-max))
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296 (delete-blank-lines)
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297 (goto-char (point-min))
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298 (while (re-search-forward "^;+ ?" nil t)
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299 (replace-match "" nil nil))
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300 (goto-char (point-min))
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301 (setq buffer-read-only t)
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302 (set-buffer-modified-p nil)
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303 (shrink-window-if-larger-than-buffer)
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304 (finder-summary)))
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305
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306 (defun finder-current-item ()
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307 (if (and finder-headmark (< (point) finder-headmark))
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308 (error "No keyword or filename on this line")
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309 (save-excursion
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310 (beginning-of-line)
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311 (current-word))))
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312
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313 ;; XEmacs change
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314 (defun finder-edit ()
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315 (interactive)
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316 (let ((entry (finder-current-item)))
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317 (if (string-match finder-file-regexp entry)
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318 (let ((path (finder-find-library entry)))
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319 (if path
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320 (find-file-other-window path)
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321 (error "Can't find Emacs Lisp library: '%s'" entry)))
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322 ;; a finder keyword
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323 (error "Finder-edit works on Emacs Lisp libraries only"))))
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324
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325 ;; XEmacs change
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326 (defun finder-view ()
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327 (interactive)
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328 (let ((entry (finder-current-item)))
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329 (if (string-match finder-file-regexp entry)
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330 (let ((path (finder-find-library entry)))
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331 (if path
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332 (view-file-other-window path)
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333 (error "Can't find Emacs Lisp library: '%s'" entry)))
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334 ;; a finder keyword
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335 (error "Finder-view works on Emacs Lisp libraries only"))))
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336
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337 (defun finder-select ()
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338 (interactive)
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339 (let ((key (finder-current-item)))
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340 ;; XEmacs change
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341 (if (string-match finder-file-regexp key)
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342 (finder-commentary key)
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343 (finder-list-matches key))))
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344
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345 ;; XEmacs change
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346 (defun finder-mouse-select (ev)
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347 (interactive "e")
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348 (goto-char (event-point ev))
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349 (finder-select))
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350
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351 (defun finder-by-keyword ()
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352 "Find packages matching a given keyword."
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353 (interactive)
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354 (finder-mode)
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355 (finder-list-keywords))
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356
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357 (defun finder-mode ()
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358 "Major mode for browsing package documentation.
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359 \\<finder-mode-map>
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360 \\[finder-select] more help for the item on the current line
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361 \\[finder-edit] edit Lisp library in another window
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362 \\[finder-view] view Lisp library in another window
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363 \\[finder-exit] exit Finder mode and kill the Finder buffer.
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364 "
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365 (interactive)
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366 (pop-to-buffer "*Finder*")
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2
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367 ;; XEmacs change
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368 (setq buffer-read-only nil
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369 mode-motion-hook 'mode-motion-highlight-line)
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370 (erase-buffer)
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371 (use-local-map finder-mode-map)
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372 (set-syntax-table emacs-lisp-mode-syntax-table)
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373 (setq mode-name "Finder")
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374 (setq major-mode 'finder-mode)
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375 (make-local-variable 'finder-headmark)
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376 (setq finder-headmark nil))
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377
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378 (defun finder-summary ()
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379 "Summarize basic Finder commands."
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380 (interactive)
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2
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381 (message "%s"
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0
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382 (substitute-command-keys
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2
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383 ;; XEmacs change
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0
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384 "\\<finder-mode-map>\\[finder-select] = select, \\[finder-list-keywords] = keywords, \\[finder-edit] = edit, \\[finder-view] = view, \\[finder-exit] = quit, \\[finder-summary] = help")))
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385
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386 (defun finder-exit ()
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387 "Exit Finder mode and kill the buffer"
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388 (interactive)
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2
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389 ;; XEmacs change
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0
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390 (or (one-window-p t 0)
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391 (delete-window))
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392 (kill-buffer "*Finder*"))
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393
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394 (provide 'finder)
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395
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396 ;;; finder.el ends here
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