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1 ;;; custom.el -- Tools for declaring and initializing options.
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2 ;;
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3 ;; Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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4 ;;
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5 ;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
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6 ;; Keywords: help, faces
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155
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7 ;; Version: 1.9907
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98
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8 ;; X-URL: http://www.dina.kvl.dk/~abraham/custom/
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9
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149
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10 ;; This file is part of GNU Emacs.
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11
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12 ;; GNU Emacs is free software; you can redistribute it and/or modify
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13 ;; it 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 ;; GNU Emacs is distributed in the hope that it will be useful,
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18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 ;; GNU 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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23 ;; along with GNU Emacs; see the file COPYING. If not, write to the
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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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98
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27 ;;; Commentary:
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28 ;;
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29 ;; If you want to use this code, please visit the URL above.
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30 ;;
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31 ;; This file only contain the code needed to declare and initialize
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32 ;; user options. The code to customize options is autoloaded from
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106
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33 ;; `cus-edit.el'.
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34
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35 ;; The code implementing face declarations is in `cus-face.el'
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36
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37 ;;; Code:
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38
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39 (require 'widget)
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40
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149
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41 (define-widget-keywords :initialize :set :get :require :prefix :tag
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42 :load :link :options :type :group)
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98
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43
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124
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44 ;; These autoloads should be deleted eventually.
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98
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45 (unless (fboundp 'load-gc)
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106
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46 ;; From cus-edit.el
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149
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47 (autoload 'custom-set-value "cus-edit" nil t)
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48 (autoload 'custom-set-variable "cus-edit" nil t)
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106
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49 (autoload 'customize "cus-edit" nil t)
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153
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50 (autoload 'customize-group "cus-edit" nil t)
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51 (autoload 'customize-group-other-window "cus-edit" nil t)
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106
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52 (autoload 'customize-variable "cus-edit" nil t)
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124
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53 (autoload 'customize-variable-other-window "cus-edit" nil t)
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106
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54 (autoload 'customize-face "cus-edit" nil t)
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124
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55 (autoload 'customize-face-other-window "cus-edit" nil t)
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106
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56 (autoload 'customize-apropos "cus-edit" nil t)
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57 (autoload 'customize-customized "cus-edit" nil t)
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149
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58 (autoload 'customize-saved "cus-edit" nil t)
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106
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59 (autoload 'custom-buffer-create "cus-edit")
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60 (autoload 'custom-make-dependencies "cus-edit")
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124
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61 (autoload 'custom-menu-create "cus-edit")
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62 (autoload 'customize-menu-create "cus-edit")
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63
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106
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64 ;; From cus-face.el
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65 (autoload 'custom-declare-face "cus-face")
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66 (autoload 'custom-set-faces "cus-face"))
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98
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67
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124
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68 (defvar custom-define-hook nil
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69 ;; Customize information for this option is in `cus-edit.el'.
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70 "Hook called after defining each customize option.")
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71
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98
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72 ;;; The `defcustom' Macro.
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73
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149
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74 (defun custom-initialize-default (symbol value)
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75 "Initialize SYMBOL with VALUE.
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76 This will do nothing if symbol already has a default binding.
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77 Otherwise, if symbol has a `saved-value' property, it will evaluate
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78 the car of that and used as the default binding for symbol.
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79 Otherwise, VALUE will be evaluated and used as the default binding for
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80 symbol."
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120
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81 (unless (default-boundp symbol)
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153
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82 ;; Use the saved value if it exists, otherwise the standard setting.
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98
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83 (set-default symbol (if (get symbol 'saved-value)
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84 (eval (car (get symbol 'saved-value)))
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149
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85 (eval value)))))
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86
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87 (defun custom-initialize-set (symbol value)
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88 "Initialize SYMBOL with VALUE.
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89 Like `custom-initialize-default', but use the function specified by
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90 `:set' to initialize SYMBOL."
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91 (unless (default-boundp symbol)
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92 (funcall (or (get symbol 'custom-set) 'set-default)
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93 symbol
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94 (if (get symbol 'saved-value)
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95 (eval (car (get symbol 'saved-value)))
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96 (eval value)))))
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97
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98 (defun custom-initialize-reset (symbol value)
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99 "Initialize SYMBOL with VALUE.
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100 Like `custom-initialize-set', but use the function specified by
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101 `:get' to reinitialize SYMBOL if it is already bound."
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102 (funcall (or (get symbol 'custom-set) 'set-default)
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103 symbol
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104 (cond ((default-boundp symbol)
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105 (funcall (or (get symbol 'custom-get) 'default-value)
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106 symbol))
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107 ((get symbol 'saved-value)
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108 (eval (car (get symbol 'saved-value))))
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109 (t
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110 (eval value)))))
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111
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112 (defun custom-initialize-changed (symbol value)
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113 "Initialize SYMBOL with VALUE.
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114 Like `custom-initialize-reset', but only use the `:set' function if the
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153
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115 not using the standard setting. Otherwise, use the `set-default'."
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149
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116 (cond ((default-boundp symbol)
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117 (funcall (or (get symbol 'custom-set) 'set-default)
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118 symbol
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119 (funcall (or (get symbol 'custom-get) 'default-value)
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120 symbol)))
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121 ((get symbol 'saved-value)
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122 (funcall (or (get symbol 'custom-set) 'set-default)
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123 symbol
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124 (eval (car (get symbol 'saved-value)))))
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125 (t
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126 (set-default symbol (eval value)))))
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127
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128 (defun custom-declare-variable (symbol value doc &rest args)
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129 "Like `defcustom', but SYMBOL and VALUE are evaluated as normal arguments."
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153
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130 ;; Remember the standard setting.
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131 (put symbol 'standard-value (list value))
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120
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132 ;; Maybe this option was rogue in an earlier version. It no longer is.
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133 (when (get symbol 'force-value)
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134 ;; It no longer is.
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135 (put symbol 'force-value nil))
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98
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136 (when doc
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137 (put symbol 'variable-documentation doc))
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149
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138 (let ((initialize 'custom-initialize-set)
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139 (requests nil))
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140 (while args
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141 (let ((arg (car args)))
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98
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142 (setq args (cdr args))
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149
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143 (unless (symbolp arg)
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144 (error "Junk in args %S" args))
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145 (let ((keyword arg)
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146 (value (car args)))
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147 (unless args
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148 (error "Keyword %s is missing an argument" keyword))
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149 (setq args (cdr args))
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150 (cond ((eq keyword :initialize)
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151 (setq initialize value))
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152 ((eq keyword :set)
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153 (put symbol 'custom-set value))
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154 ((eq keyword :get)
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155 (put symbol 'custom-get value))
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156 ((eq keyword :require)
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153
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157 (setq requests (cons value requests)))
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149
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158 ((eq keyword :type)
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159 (put symbol 'custom-type value))
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160 ((eq keyword :options)
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161 (if (get symbol 'custom-options)
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162 ;; Slow safe code to avoid duplicates.
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163 (mapcar (lambda (option)
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164 (custom-add-option symbol option))
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165 value)
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166 ;; Fast code for the common case.
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167 (put symbol 'custom-options (copy-sequence value))))
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168 (t
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169 (custom-handle-keyword symbol keyword value
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170 'custom-variable))))))
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171 (put symbol 'custom-requests requests)
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172 ;; Do the actual initialization.
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173 (funcall initialize symbol value))
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98
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174 (run-hooks 'custom-define-hook)
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175 symbol)
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176
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177 (defmacro defcustom (symbol value doc &rest args)
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178 "Declare SYMBOL as a customizable variable that defaults to VALUE.
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179 DOC is the variable documentation.
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180
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181 Neither SYMBOL nor VALUE needs to be quoted.
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182 If SYMBOL is not already bound, initialize it to VALUE.
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183 The remaining arguments should have the form
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184
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185 [KEYWORD VALUE]...
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186
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187 The following KEYWORD's are defined:
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188
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189 :type VALUE should be a widget type for editing the symbols value.
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190 The default is `sexp'.
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98
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191 :options VALUE should be a list of valid members of the widget type.
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192 :group VALUE should be a customization group.
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193 Add SYMBOL to that group.
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149
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194 :initialize VALUE should be a function used to initialize the
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195 variable. It takes two arguments, the symbol and value
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196 given in the `defcustom' call. The default is
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197 `custom-initialize-default'
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198 :set VALUE should be a function to set the value of the symbol.
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199 It takes two arguments, the symbol to set and the value to
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200 give it. The default is `set-default'.
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201 :get VALUE should be a function to extract the value of symbol.
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202 The function takes one argument, a symbol, and should return
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203 the current value for that symbol. The default is
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204 `default-value'.
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205 :require VALUE should be a feature symbol. Each feature will be
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206 required after initialization, of the the user have saved this
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207 option.
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208
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149
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209 Read the section about customization in the Emacs Lisp manual for more
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210 information."
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149
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211 `(custom-declare-variable (quote ,symbol) (quote ,value) ,doc ,@args))
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212
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213 ;;; The `defface' Macro.
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214
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215 (defmacro defface (face spec doc &rest args)
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216 "Declare FACE as a customizable face that defaults to SPEC.
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217 FACE does not need to be quoted.
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218
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219 Third argument DOC is the face documentation.
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220
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221 If FACE has been set with `custom-set-face', set the face attributes
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222 as specified by that function, otherwise set the face attributes
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223 according to SPEC.
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224
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225 The remaining arguments should have the form
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226
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227 [KEYWORD VALUE]...
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228
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229 The following KEYWORDs are defined:
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230
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231 :group VALUE should be a customization group.
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232 Add FACE to that group.
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233
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234 SPEC should be an alist of the form ((DISPLAY ATTS)...).
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235
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236 ATTS is a list of face attributes and their values. The possible
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237 attributes are defined in the variable `custom-face-attributes'.
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238
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239 The ATTS of the first entry in SPEC where the DISPLAY matches the
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240 frame should take effect in that frame. DISPLAY can either be the
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241 symbol t, which will match all frames, or an alist of the form
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98
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242 \((REQ ITEM...)...)
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243
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244 For the DISPLAY to match a FRAME, the REQ property of the frame must
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245 match one of the ITEM. The following REQ are defined:
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246
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118
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247 `type' (the value of `window-system')
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98
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248 Should be one of `x' or `tty'.
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249
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250 `class' (the frame's color support)
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251 Should be one of `color', `grayscale', or `mono'.
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252
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253 `background' (what color is used for the background text)
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254 Should be one of `light' or `dark'.
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255
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149
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256 Read the section about customization in the Emacs Lisp manual for more
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98
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257 information."
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258 `(custom-declare-face (quote ,face) ,spec ,doc ,@args))
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259
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260 ;;; The `defgroup' Macro.
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261
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262 (defun custom-declare-group (symbol members doc &rest args)
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263 "Like `defgroup', but SYMBOL is evaluated as a normal argument."
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149
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264 (while members
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265 (apply 'custom-add-to-group symbol (car members))
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266 (setq members (cdr members)))
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98
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267 (put symbol 'custom-group (nconc members (get symbol 'custom-group)))
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268 (when doc
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269 (put symbol 'group-documentation doc))
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270 (while args
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271 (let ((arg (car args)))
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272 (setq args (cdr args))
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273 (unless (symbolp arg)
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274 (error "Junk in args %S" args))
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275 (let ((keyword arg)
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276 (value (car args)))
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277 (unless args
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278 (error "Keyword %s is missing an argument" keyword))
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279 (setq args (cdr args))
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280 (cond ((eq keyword :prefix)
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281 (put symbol 'custom-prefix value))
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282 (t
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283 (custom-handle-keyword symbol keyword value
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284 'custom-group))))))
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285 (run-hooks 'custom-define-hook)
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286 symbol)
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287
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288 (defmacro defgroup (symbol members doc &rest args)
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289 "Declare SYMBOL as a customization group containing MEMBERS.
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290 SYMBOL does not need to be quoted.
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291
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292 Third arg DOC is the group documentation.
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293
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294 MEMBERS should be an alist of the form ((NAME WIDGET)...) where
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295 NAME is a symbol and WIDGET is a widget is a widget for editing that
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296 symbol. Useful widgets are `custom-variable' for editing variables,
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297 `custom-face' for edit faces, and `custom-group' for editing groups.
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298
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299 The remaining arguments should have the form
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300
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301 [KEYWORD VALUE]...
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302
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303 The following KEYWORD's are defined:
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304
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305 :group VALUE should be a customization group.
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306 Add SYMBOL to that group.
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307
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149
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308 Read the section about customization in the Emacs Lisp manual for more
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98
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309 information."
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310 `(custom-declare-group (quote ,symbol) ,members ,doc ,@args))
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311
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312 (defun custom-add-to-group (group option widget)
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118
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313 "To existing GROUP add a new OPTION of type WIDGET.
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314 If there already is an entry for that option, overwrite it."
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315 (let* ((members (get group 'custom-group))
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316 (old (assq option members)))
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317 (if old
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318 (setcar (cdr old) widget)
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319 (put group 'custom-group (nconc members (list (list option widget)))))))
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320
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321 ;;; Properties.
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322
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323 (defun custom-handle-all-keywords (symbol args type)
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324 "For customization option SYMBOL, handle keyword arguments ARGS.
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325 Third argument TYPE is the custom option type."
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326 (while args
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327 (let ((arg (car args)))
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328 (setq args (cdr args))
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329 (unless (symbolp arg)
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330 (error "Junk in args %S" args))
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331 (let ((keyword arg)
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332 (value (car args)))
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333 (unless args
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334 (error "Keyword %s is missing an argument" keyword))
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335 (setq args (cdr args))
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336 (custom-handle-keyword symbol keyword value type)))))
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337
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338 (defun custom-handle-keyword (symbol keyword value type)
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339 "For customization option SYMBOL, handle KEYWORD with VALUE.
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340 Fourth argument TYPE is the custom option type."
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341 (cond ((eq keyword :group)
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342 (custom-add-to-group value symbol type))
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343 ((eq keyword :link)
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344 (custom-add-link symbol value))
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345 ((eq keyword :load)
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346 (custom-add-load symbol value))
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347 ((eq keyword :tag)
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348 (put symbol 'custom-tag value))
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349 (t
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350 (error "Unknown keyword %s" symbol))))
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351
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352 (defun custom-add-option (symbol option)
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353 "To the variable SYMBOL add OPTION.
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354
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355 If SYMBOL is a hook variable, OPTION should be a hook member.
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356 For other types variables, the effect is undefined."
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357 (let ((options (get symbol 'custom-options)))
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358 (unless (member option options)
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359 (put symbol 'custom-options (cons option options)))))
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360
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361 (defun custom-add-link (symbol widget)
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362 "To the custom option SYMBOL add the link WIDGET."
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363 (let ((links (get symbol 'custom-links)))
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364 (unless (member widget links)
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365 (put symbol 'custom-links (cons widget links)))))
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366
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367 (defun custom-add-load (symbol load)
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368 "To the custom option SYMBOL add the dependency LOAD.
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369 LOAD should be either a library file name, or a feature name."
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370 (let ((loads (get symbol 'custom-loads)))
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371 (unless (member load loads)
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372 (put symbol 'custom-loads (cons load loads)))))
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373
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374 ;;; Initializing.
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375
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376 (defun custom-set-variables (&rest args)
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377 "Initialize variables according to user preferences.
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378
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379 The arguments should be a list where each entry has the form:
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380
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381 (SYMBOL VALUE [NOW])
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382
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383 The unevaluated VALUE is stored as the saved value for SYMBOL.
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384 If NOW is present and non-nil, VALUE is also evaluated and bound as
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385 the default value for the SYMBOL."
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386 (while args
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387 (let ((entry (car args)))
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388 (if (listp entry)
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149
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389 (let* ((symbol (nth 0 entry))
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390 (value (nth 1 entry))
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391 (now (nth 2 entry))
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392 (requests (nth 3 entry))
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393 (set (or (get symbol 'custom-set) 'set-default)))
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98
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394 (put symbol 'saved-value (list value))
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120
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395 (cond (now
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396 ;; Rogue variable, set it now.
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397 (put symbol 'force-value t)
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149
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398 (funcall set symbol (eval value)))
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120
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399 ((default-boundp symbol)
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400 ;; Something already set this, overwrite it.
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149
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401 (funcall set symbol (eval value))))
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402 (when requests
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403 (put symbol 'custom-requests requests)
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404 (mapcar 'require requests))
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98
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405 (setq args (cdr args)))
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406 ;; Old format, a plist of SYMBOL VALUE pairs.
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124
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407 (message "Warning: old format `custom-set-variables'")
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408 (ding)
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409 (sit-for 2)
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98
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410 (let ((symbol (nth 0 args))
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411 (value (nth 1 args)))
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412 (put symbol 'saved-value (list value)))
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413 (setq args (cdr (cdr args)))))))
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414
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415 ;;; The End.
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416
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417 (provide 'custom)
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418
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419 ;; custom.el ends here
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