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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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185
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7 ;; Version: 1.9956
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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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165
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47 (autoload 'customize-set-value "cus-edit" nil t)
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48 (autoload 'customize-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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163
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50 (autoload 'customize-browse "cus-edit" nil t)
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153
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51 (autoload 'customize-group "cus-edit" nil t)
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52 (autoload 'customize-group-other-window "cus-edit" nil t)
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106
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53 (autoload 'customize-variable "cus-edit" nil t)
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124
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54 (autoload 'customize-variable-other-window "cus-edit" nil t)
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106
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55 (autoload 'customize-face "cus-edit" nil t)
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124
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56 (autoload 'customize-face-other-window "cus-edit" nil t)
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106
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57 (autoload 'customize-apropos "cus-edit" nil t)
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58 (autoload 'customize-customized "cus-edit" nil t)
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149
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59 (autoload 'customize-saved "cus-edit" nil t)
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106
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60 (autoload 'custom-buffer-create "cus-edit")
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61 (autoload 'custom-make-dependencies "cus-edit")
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124
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62 (autoload 'custom-menu-create "cus-edit")
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63 (autoload 'customize-menu-create "cus-edit")
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64
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106
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65 ;; From cus-face.el
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66 (autoload 'custom-declare-face "cus-face")
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67 (autoload 'custom-set-faces "cus-face"))
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98
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68
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124
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69 (defvar custom-define-hook nil
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70 ;; Customize information for this option is in `cus-edit.el'.
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71 "Hook called after defining each customize option.")
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72
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98
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73 ;;; The `defcustom' Macro.
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74
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149
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75 (defun custom-initialize-default (symbol value)
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76 "Initialize SYMBOL with VALUE.
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77 This will do nothing if symbol already has a default binding.
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78 Otherwise, if symbol has a `saved-value' property, it will evaluate
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79 the car of that and used as the default binding for symbol.
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80 Otherwise, VALUE will be evaluated and used as the default binding for
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81 symbol."
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120
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82 (unless (default-boundp symbol)
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153
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83 ;; Use the saved value if it exists, otherwise the standard setting.
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98
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84 (set-default symbol (if (get symbol 'saved-value)
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85 (eval (car (get symbol 'saved-value)))
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149
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86 (eval value)))))
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87
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88 (defun custom-initialize-set (symbol value)
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89 "Initialize SYMBOL with VALUE.
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90 Like `custom-initialize-default', but use the function specified by
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91 `:set' to initialize SYMBOL."
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92 (unless (default-boundp symbol)
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93 (funcall (or (get symbol 'custom-set) 'set-default)
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94 symbol
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95 (if (get symbol 'saved-value)
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96 (eval (car (get symbol 'saved-value)))
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97 (eval value)))))
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98
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99 (defun custom-initialize-reset (symbol value)
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100 "Initialize SYMBOL with VALUE.
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101 Like `custom-initialize-set', but use the function specified by
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102 `:get' to reinitialize SYMBOL if it is already bound."
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103 (funcall (or (get symbol 'custom-set) 'set-default)
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104 symbol
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105 (cond ((default-boundp symbol)
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106 (funcall (or (get symbol 'custom-get) 'default-value)
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107 symbol))
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108 ((get symbol 'saved-value)
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109 (eval (car (get symbol 'saved-value))))
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110 (t
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111 (eval value)))))
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112
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113 (defun custom-initialize-changed (symbol value)
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114 "Initialize SYMBOL with VALUE.
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115 Like `custom-initialize-reset', but only use the `:set' function if the
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153
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116 not using the standard setting. Otherwise, use the `set-default'."
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149
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117 (cond ((default-boundp symbol)
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118 (funcall (or (get symbol 'custom-set) 'set-default)
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119 symbol
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120 (funcall (or (get symbol 'custom-get) 'default-value)
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121 symbol)))
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122 ((get symbol 'saved-value)
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123 (funcall (or (get symbol 'custom-set) 'set-default)
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124 symbol
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125 (eval (car (get symbol 'saved-value)))))
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126 (t
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127 (set-default symbol (eval value)))))
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128
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129 (defun custom-declare-variable (symbol value doc &rest args)
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130 "Like `defcustom', but SYMBOL and VALUE are evaluated as normal arguments."
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153
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131 ;; Remember the standard setting.
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132 (put symbol 'standard-value (list value))
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120
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133 ;; Maybe this option was rogue in an earlier version. It no longer is.
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134 (when (get symbol 'force-value)
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135 ;; It no longer is.
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136 (put symbol 'force-value nil))
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98
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137 (when doc
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138 (put symbol 'variable-documentation doc))
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149
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139 (let ((initialize 'custom-initialize-set)
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140 (requests nil))
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141 (while args
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142 (let ((arg (car args)))
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98
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143 (setq args (cdr args))
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149
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144 (unless (symbolp arg)
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145 (error "Junk in args %S" args))
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146 (let ((keyword arg)
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147 (value (car args)))
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148 (unless args
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149 (error "Keyword %s is missing an argument" keyword))
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150 (setq args (cdr args))
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151 (cond ((eq keyword :initialize)
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152 (setq initialize value))
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153 ((eq keyword :set)
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154 (put symbol 'custom-set value))
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155 ((eq keyword :get)
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156 (put symbol 'custom-get value))
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157 ((eq keyword :require)
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153
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158 (setq requests (cons value requests)))
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149
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159 ((eq keyword :type)
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160 (put symbol 'custom-type value))
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161 ((eq keyword :options)
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162 (if (get symbol 'custom-options)
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163 ;; Slow safe code to avoid duplicates.
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164 (mapcar (lambda (option)
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165 (custom-add-option symbol option))
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166 value)
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167 ;; Fast code for the common case.
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168 (put symbol 'custom-options (copy-sequence value))))
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169 (t
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170 (custom-handle-keyword symbol keyword value
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171 'custom-variable))))))
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172 (put symbol 'custom-requests requests)
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173 ;; Do the actual initialization.
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174 (funcall initialize symbol value))
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98
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175 (run-hooks 'custom-define-hook)
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176 symbol)
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177
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178 (defmacro defcustom (symbol value doc &rest args)
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179 "Declare SYMBOL as a customizable variable that defaults to VALUE.
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180 DOC is the variable documentation.
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181
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182 Neither SYMBOL nor VALUE needs to be quoted.
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183 If SYMBOL is not already bound, initialize it to VALUE.
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184 The remaining arguments should have the form
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185
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186 [KEYWORD VALUE]...
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187
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188 The following KEYWORD's are defined:
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189
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190 :type VALUE should be a widget type for editing the symbols value.
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191 The default is `sexp'.
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98
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192 :options VALUE should be a list of valid members of the widget type.
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193 :group VALUE should be a customization group.
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194 Add SYMBOL to that group.
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149
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195 :initialize VALUE should be a function used to initialize the
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196 variable. It takes two arguments, the symbol and value
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197 given in the `defcustom' call. The default is
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173
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198 `custom-initialize-set'
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149
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199 :set VALUE should be a function to set the value of the symbol.
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200 It takes two arguments, the symbol to set and the value to
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201 give it. The default is `set-default'.
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202 :get VALUE should be a function to extract the value of symbol.
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203 The function takes one argument, a symbol, and should return
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204 the current value for that symbol. The default is
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205 `default-value'.
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206 :require VALUE should be a feature symbol. Each feature will be
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207 required after initialization, of the the user have saved this
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208 option.
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209
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149
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210 Read the section about customization in the Emacs Lisp manual for more
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98
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211 information."
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149
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212 `(custom-declare-variable (quote ,symbol) (quote ,value) ,doc ,@args))
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98
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213
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214 ;;; The `defface' Macro.
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215
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216 (defmacro defface (face spec doc &rest args)
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217 "Declare FACE as a customizable face that defaults to SPEC.
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218 FACE does not need to be quoted.
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219
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220 Third argument DOC is the face documentation.
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221
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222 If FACE has been set with `custom-set-face', set the face attributes
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223 as specified by that function, otherwise set the face attributes
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224 according to SPEC.
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225
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226 The remaining arguments should have the form
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227
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228 [KEYWORD VALUE]...
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229
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155
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230 The following KEYWORDs are defined:
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231
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232 :group VALUE should be a customization group.
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233 Add FACE to that group.
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234
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235 SPEC should be an alist of the form ((DISPLAY ATTS)...).
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236
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237 ATTS is a list of face attributes and their values. The possible
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238 attributes are defined in the variable `custom-face-attributes'.
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239
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240 The ATTS of the first entry in SPEC where the DISPLAY matches the
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241 frame should take effect in that frame. DISPLAY can either be the
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118
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242 symbol t, which will match all frames, or an alist of the form
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98
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243 \((REQ ITEM...)...)
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244
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245 For the DISPLAY to match a FRAME, the REQ property of the frame must
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246 match one of the ITEM. The following REQ are defined:
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247
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118
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248 `type' (the value of `window-system')
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249 Should be one of `x' or `tty'.
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250
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251 `class' (the frame's color support)
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252 Should be one of `color', `grayscale', or `mono'.
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253
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254 `background' (what color is used for the background text)
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255 Should be one of `light' or `dark'.
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256
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149
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257 Read the section about customization in the Emacs Lisp manual for more
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98
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258 information."
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259 `(custom-declare-face (quote ,face) ,spec ,doc ,@args))
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260
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261 ;;; The `defgroup' Macro.
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262
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263 (defun custom-declare-group (symbol members doc &rest args)
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264 "Like `defgroup', but SYMBOL is evaluated as a normal argument."
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149
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265 (while members
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266 (apply 'custom-add-to-group symbol (car members))
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267 (setq members (cdr members)))
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98
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268 (put symbol 'custom-group (nconc members (get symbol 'custom-group)))
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269 (when doc
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270 (put symbol 'group-documentation doc))
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271 (while args
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272 (let ((arg (car args)))
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273 (setq args (cdr args))
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274 (unless (symbolp arg)
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275 (error "Junk in args %S" args))
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276 (let ((keyword arg)
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277 (value (car args)))
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278 (unless args
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279 (error "Keyword %s is missing an argument" keyword))
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280 (setq args (cdr args))
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281 (cond ((eq keyword :prefix)
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282 (put symbol 'custom-prefix value))
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283 (t
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284 (custom-handle-keyword symbol keyword value
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285 'custom-group))))))
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286 (run-hooks 'custom-define-hook)
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287 symbol)
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288
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289 (defmacro defgroup (symbol members doc &rest args)
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290 "Declare SYMBOL as a customization group containing MEMBERS.
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291 SYMBOL does not need to be quoted.
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292
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293 Third arg DOC is the group documentation.
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294
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177
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295 MEMBERS should be an alist of the form ((NAME WIDGET)...) where NAME
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296 is a symbol and WIDGET is a widget for editing that symbol. Useful
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297 widgets are `custom-variable' for editing variables, `custom-face' for
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298 edit faces, and `custom-group' for editing groups.
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98
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299
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300 The remaining arguments should have the form
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301
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302 [KEYWORD VALUE]...
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303
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304 The following KEYWORD's are defined:
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305
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306 :group VALUE should be a customization group.
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307 Add SYMBOL to that group.
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308
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149
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309 Read the section about customization in the Emacs Lisp manual for more
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98
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310 information."
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311 `(custom-declare-group (quote ,symbol) ,members ,doc ,@args))
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312
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313 (defun custom-add-to-group (group option widget)
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118
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314 "To existing GROUP add a new OPTION of type WIDGET.
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315 If there already is an entry for that option, overwrite it."
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316 (let* ((members (get group 'custom-group))
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317 (old (assq option members)))
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318 (if old
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319 (setcar (cdr old) widget)
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320 (put group 'custom-group (nconc members (list (list option widget)))))))
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321
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322 ;;; Properties.
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323
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324 (defun custom-handle-all-keywords (symbol args type)
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325 "For customization option SYMBOL, handle keyword arguments ARGS.
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326 Third argument TYPE is the custom option type."
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327 (while args
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328 (let ((arg (car args)))
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329 (setq args (cdr args))
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330 (unless (symbolp arg)
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331 (error "Junk in args %S" args))
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332 (let ((keyword arg)
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333 (value (car args)))
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334 (unless args
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335 (error "Keyword %s is missing an argument" keyword))
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336 (setq args (cdr args))
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337 (custom-handle-keyword symbol keyword value type)))))
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338
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339 (defun custom-handle-keyword (symbol keyword value type)
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340 "For customization option SYMBOL, handle KEYWORD with VALUE.
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341 Fourth argument TYPE is the custom option type."
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342 (cond ((eq keyword :group)
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343 (custom-add-to-group value symbol type))
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344 ((eq keyword :link)
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345 (custom-add-link symbol value))
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346 ((eq keyword :load)
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347 (custom-add-load symbol value))
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348 ((eq keyword :tag)
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349 (put symbol 'custom-tag value))
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350 (t
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351 (error "Unknown keyword %s" symbol))))
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352
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353 (defun custom-add-option (symbol option)
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354 "To the variable SYMBOL add OPTION.
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355
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356 If SYMBOL is a hook variable, OPTION should be a hook member.
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357 For other types variables, the effect is undefined."
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358 (let ((options (get symbol 'custom-options)))
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359 (unless (member option options)
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360 (put symbol 'custom-options (cons option options)))))
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361
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362 (defun custom-add-link (symbol widget)
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363 "To the custom option SYMBOL add the link WIDGET."
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364 (let ((links (get symbol 'custom-links)))
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365 (unless (member widget links)
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366 (put symbol 'custom-links (cons widget links)))))
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367
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368 (defun custom-add-load (symbol load)
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369 "To the custom option SYMBOL add the dependency LOAD.
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370 LOAD should be either a library file name, or a feature name."
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371 (let ((loads (get symbol 'custom-loads)))
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372 (unless (member load loads)
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373 (put symbol 'custom-loads (cons load loads)))))
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374
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375 ;;; Initializing.
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376
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377 (defun custom-set-variables (&rest args)
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378 "Initialize variables according to user preferences.
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379
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380 The arguments should be a list where each entry has the form:
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381
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382 (SYMBOL VALUE [NOW])
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383
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384 The unevaluated VALUE is stored as the saved value for SYMBOL.
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385 If NOW is present and non-nil, VALUE is also evaluated and bound as
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386 the default value for the SYMBOL."
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387 (while args
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388 (let ((entry (car args)))
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389 (if (listp entry)
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149
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390 (let* ((symbol (nth 0 entry))
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391 (value (nth 1 entry))
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392 (now (nth 2 entry))
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393 (requests (nth 3 entry))
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394 (set (or (get symbol 'custom-set) 'set-default)))
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98
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395 (put symbol 'saved-value (list value))
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120
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396 (cond (now
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397 ;; Rogue variable, set it now.
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398 (put symbol 'force-value t)
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149
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399 (funcall set symbol (eval value)))
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120
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400 ((default-boundp symbol)
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401 ;; Something already set this, overwrite it.
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149
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402 (funcall set symbol (eval value))))
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403 (when requests
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404 (put symbol 'custom-requests requests)
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405 (mapcar 'require requests))
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98
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406 (setq args (cdr args)))
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407 ;; Old format, a plist of SYMBOL VALUE pairs.
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124
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408 (message "Warning: old format `custom-set-variables'")
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409 (ding)
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410 (sit-for 2)
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98
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411 (let ((symbol (nth 0 args))
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412 (value (nth 1 args)))
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413 (put symbol 'saved-value (list value)))
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414 (setq args (cdr (cdr args)))))))
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415
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416 ;;; The End.
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417
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418 (provide 'custom)
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419
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420 ;; custom.el ends here
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