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428
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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 ;; Maintainer: Hrvoje Niksic <hniksic@xemacs.org>
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7 ;; Keywords: help, faces, dumped
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8 ;; Version: 1.9960-x
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9 ;; X-URL: http://www.dina.kvl.dk/~abraham/custom/
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10
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11 ;; This file is part of XEmacs.
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12
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13 ;; XEmacs is free software; you can redistribute it and/or modify
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14 ;; it under the terms of the GNU General Public License as published by
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15 ;; the Free Software Foundation; either version 2, or (at your option)
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16 ;; any later version.
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17
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18 ;; XEmacs is distributed in the hope that it will be useful,
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19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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21 ;; GNU General Public License for more details.
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22
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23 ;; You should have received a copy of the GNU General Public License
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24 ;; along with XEmacs; see the file COPYING. If not, write to the
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25 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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26 ;; Boston, MA 02111-1307, USA.
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27
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28 ;;; Commentary:
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29
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30 ;; This file is dumped with XEmacs.
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31
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32 ;; This file only contain the code needed to declare and initialize
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33 ;; user options. The code to customize options is autoloaded from
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34 ;; `cus-edit.el'.
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35 ;;
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36 ;; The code implementing face declarations is in `cus-face.el'
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37
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38 ;;; Code:
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39
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40 (eval-when-compile
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41 (load "cl-macs"))
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42
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43 (if (not (fboundp 'defun*))
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44 (autoload 'defun* "cl-macs"))
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45
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46 (require 'widget)
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47
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48 (defvar custom-define-hook nil
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49 ;; Customize information for this option is in `cus-edit.el'.
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50 "Hook called after defining each customize option.")
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51
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52 ;;; The `defcustom' Macro.
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53
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54 (defun custom-initialize-default (symbol value)
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55 "Initialize SYMBOL with VALUE.
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56 This will do nothing if symbol already has a default binding.
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57 Otherwise, if symbol has a `saved-value' property, it will evaluate
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58 the car of that and used as the default binding for symbol.
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59 Otherwise, VALUE will be evaluated and used as the default binding for
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60 symbol."
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61 (unless (default-boundp symbol)
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62 ;; Use the saved value if it exists, otherwise the standard setting.
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63 (set-default symbol (if (get symbol 'saved-value)
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64 (eval (car (get symbol 'saved-value)))
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65 (eval value)))))
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66
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67 (defun custom-initialize-set (symbol value)
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68 "Initialize SYMBOL with VALUE.
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69 Like `custom-initialize-default', but use the function specified by
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70 `:set' to initialize SYMBOL."
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71 (unless (default-boundp symbol)
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72 (funcall (or (get symbol 'custom-set) 'set-default)
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73 symbol
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74 (if (get symbol 'saved-value)
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75 (eval (car (get symbol 'saved-value)))
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76 (eval value)))))
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77
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78 (defun custom-initialize-reset (symbol value)
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79 "Initialize SYMBOL with VALUE.
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80 Like `custom-initialize-set', but use the function specified by
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81 `:get' to reinitialize SYMBOL if it is already bound."
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82 (funcall (or (get symbol 'custom-set) 'set-default)
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83 symbol
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84 (cond ((default-boundp symbol)
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85 (funcall (or (get symbol 'custom-get) 'default-value)
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86 symbol))
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87 ((get symbol 'saved-value)
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88 (eval (car (get symbol 'saved-value))))
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89 (t
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90 (eval value)))))
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91
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92 (defun custom-initialize-changed (symbol value)
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93 "Initialize SYMBOL with VALUE.
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94 Like `custom-initialize-reset', but only use the `:set' function if the
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95 not using the standard setting. Otherwise, use the `set-default'."
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96 (cond ((default-boundp symbol)
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97 (funcall (or (get symbol 'custom-set) 'set-default)
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98 symbol
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99 (funcall (or (get symbol 'custom-get) 'default-value)
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100 symbol)))
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101 ((get symbol 'saved-value)
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102 (funcall (or (get symbol 'custom-set) 'set-default)
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103 symbol
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104 (eval (car (get symbol 'saved-value)))))
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105 (t
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106 (set-default symbol (eval value)))))
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107
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108 (defun custom-declare-variable (symbol value doc &rest args)
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109 "Like `defcustom', but SYMBOL and VALUE are evaluated as normal arguments."
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110 ;; Remember the standard setting.
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111 (put symbol 'standard-value (list value))
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112 ;; Maybe this option was rogue in an earlier version. It no longer is.
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113 (when (eq (get symbol 'force-value) 'rogue)
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114 ;; It no longer is.
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115 (put symbol 'force-value nil))
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116 (when doc
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117 (put symbol 'variable-documentation doc))
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118 (let ((initialize 'custom-initialize-reset)
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119 (requests nil))
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120 (while args
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121 (let ((arg (car args)))
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122 (setq args (cdr args))
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123 (check-argument-type 'keywordp arg)
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124 (let ((keyword arg)
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125 (value (car args)))
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126 (unless args
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127 (signal 'error (list "Keyword is missing an argument" keyword)))
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128 (setq args (cdr args))
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129 (cond ((eq keyword :initialize)
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130 (setq initialize value))
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131 ((eq keyword :set)
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132 (put symbol 'custom-set value))
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133 ((eq keyword :get)
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134 (put symbol 'custom-get value))
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135 ((eq keyword :require)
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136 (setq requests (cons value requests)))
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137 ((eq keyword :type)
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138 (put symbol 'custom-type value))
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139 ((eq keyword :options)
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140 (if (get symbol 'custom-options)
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141 ;; Slow safe code to avoid duplicates.
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142 (mapc (lambda (option)
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143 (custom-add-option symbol option))
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144 value)
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145 ;; Fast code for the common case.
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146 (put symbol 'custom-options (copy-sequence value))))
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147 (t
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148 (custom-handle-keyword symbol keyword value
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149 'custom-variable))))))
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150 (put symbol 'custom-requests requests)
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151 ;; Do the actual initialization.
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152 (funcall initialize symbol value))
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153 ;; #### This is a rough equivalent of LOADHIST_ATTACH. However,
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154 ;; LOADHIST_ATTACH also checks for `initialized'.
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155 (push symbol current-load-list)
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156 (run-hooks 'custom-define-hook)
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157 symbol)
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158
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159 (defmacro defcustom (symbol value doc &rest args)
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160 "Declare SYMBOL as a customizable variable that defaults to VALUE.
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161 DOC is the variable documentation.
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162
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163 Neither SYMBOL nor VALUE needs to be quoted.
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164 If SYMBOL is not already bound, initialize it to VALUE.
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165 The remaining arguments should have the form
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166
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167 [KEYWORD VALUE]...
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168
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169 The following KEYWORD's are defined:
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170
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171 :type VALUE should be a widget type for editing the symbols value.
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172 The default is `sexp'.
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173 :options VALUE should be a list of valid members of the widget type.
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174 :group VALUE should be a customization group.
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175 Add SYMBOL to that group.
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176 :initialize VALUE should be a function used to initialize the
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177 variable. It takes two arguments, the symbol and value
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178 given in the `defcustom' call. The default is
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179 `custom-initialize-set'
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180 :set VALUE should be a function to set the value of the symbol.
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181 It takes two arguments, the symbol to set and the value to
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182 give it. The default is `set-default'.
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183 :get VALUE should be a function to extract the value of symbol.
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184 The function takes one argument, a symbol, and should return
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185 the current value for that symbol. The default is
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186 `default-value'.
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187 :require VALUE should be a feature symbol. Each feature will be
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188 required after initialization, of the the user have saved this
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189 option.
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190
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191 Read the section about customization in the Emacs Lisp manual for more
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192 information."
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193 `(custom-declare-variable (quote ,symbol) (quote ,value) ,doc ,@args))
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194
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195 ;;; The `defface' Macro.
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196
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197 (defmacro defface (face spec doc &rest args)
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198 "Declare FACE as a customizable face that defaults to SPEC.
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199 FACE does not need to be quoted.
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200
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201 Third argument DOC is the face documentation.
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202
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203 If FACE has been set with `custom-set-face', set the face attributes
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204 as specified by that function, otherwise set the face attributes
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205 according to SPEC.
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206
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207 The remaining arguments should have the form
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208
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209 [KEYWORD VALUE]...
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210
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211 The following KEYWORDs are defined:
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212
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213 :group VALUE should be a customization group.
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214 Add FACE to that group.
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215
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216 SPEC should be an alist of the form ((DISPLAY ATTS)...).
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217
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218 ATTS is a list of face attributes and their values. The possible
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219 attributes are defined in the variable `custom-face-attributes'.
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220
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221 The ATTS of the first entry in SPEC where the DISPLAY matches the
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222 frame should take effect in that frame. DISPLAY can either be the
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223 symbol t, which will match all frames, or an alist of the form
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224 \((REQ ITEM...)...)
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225
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226 For the DISPLAY to match a FRAME, the REQ property of the frame must
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227 match one of the ITEM. The following REQ are defined:
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228
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229 `type' (the value of `window-system')
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230 Should be one of `x' or `tty'.
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231
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232 `class' (the frame's color support)
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233 Should be one of `color', `grayscale', or `mono'.
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234
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235 `background' (what color is used for the background text)
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236 Should be one of `light' or `dark'.
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237
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238 Read the section about customization in the Emacs Lisp manual for more
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239 information."
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240 `(custom-declare-face (quote ,face) ,spec ,doc ,@args))
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241
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242 ;;; The `defgroup' Macro.
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243
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244 (defun custom-declare-group (symbol members doc &rest args)
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245 "Like `defgroup', but SYMBOL is evaluated as a normal argument."
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246 (while members
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247 (apply 'custom-add-to-group symbol (car members))
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248 (pop members))
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249 (put symbol 'custom-group (nconc members (get symbol 'custom-group)))
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250 (when doc
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251 (put symbol 'group-documentation doc))
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252 (while args
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253 (let ((arg (car args)))
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254 (setq args (cdr args))
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255 (check-argument-type 'keywordp arg)
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256 (let ((keyword arg)
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257 (value (car args)))
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258 (unless args
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259 (signal 'error (list "Keyword is missing an argument" keyword)))
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260 (setq args (cdr args))
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261 (cond ((eq keyword :prefix)
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262 (put symbol 'custom-prefix value))
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263 (t
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264 (custom-handle-keyword symbol keyword value
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265 'custom-group))))))
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266 (run-hooks 'custom-define-hook)
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267 symbol)
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268
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269 (defmacro defgroup (symbol members doc &rest args)
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270 "Declare SYMBOL as a customization group containing MEMBERS.
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271 SYMBOL does not need to be quoted.
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272
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273 Third arg DOC is the group documentation.
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274
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275 MEMBERS should be an alist of the form ((NAME WIDGET)...) where NAME
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276 is a symbol and WIDGET is a widget for editing that symbol. Useful
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277 widgets are `custom-variable' for editing variables, `custom-face' for
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278 edit faces, and `custom-group' for editing groups.
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279
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280 The remaining arguments should have the form
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281
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282 [KEYWORD VALUE]...
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283
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284 The following KEYWORD's are defined:
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285
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286 :group VALUE should be a customization group.
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287 Add SYMBOL to that group.
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288
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289 Read the section about customization in the Emacs Lisp manual for more
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290 information."
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291 `(custom-declare-group (quote ,symbol) ,members ,doc ,@args))
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292
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293 (defvar custom-group-hash-table (make-hash-table :size 300 :test 'eq)
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294 "Hash-table of non-empty groups.")
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295
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296 (defun custom-add-to-group (group option widget)
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297 "To existing GROUP add a new OPTION of type WIDGET.
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298 If there already is an entry for that option, overwrite it."
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299 (let* ((members (get group 'custom-group))
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300 (old (assq option members)))
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301 (if old
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302 (setcar (cdr old) widget)
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303 (put group 'custom-group (nconc members (list (list option widget))))))
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304 (puthash group t custom-group-hash-table))
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305
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306 ;;; Properties.
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307
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308 (defun custom-handle-all-keywords (symbol args type)
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309 "For customization option SYMBOL, handle keyword arguments ARGS.
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310 Third argument TYPE is the custom option type."
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311 (while args
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312 (let ((arg (car args)))
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313 (setq args (cdr args))
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314 (check-argument-type 'keywordp arg)
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315 (let ((keyword arg)
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316 (value (car args)))
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317 (unless args
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318 (signal 'error (list "Keyword is missing an argument" keyword)))
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319 (setq args (cdr args))
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320 (custom-handle-keyword symbol keyword value type)))))
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321
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322 (defun custom-handle-keyword (symbol keyword value type)
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323 "For customization option SYMBOL, handle KEYWORD with VALUE.
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324 Fourth argument TYPE is the custom option type."
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325 (cond ((eq keyword :group)
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326 (custom-add-to-group value symbol type))
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327 ((eq keyword :version)
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328 (custom-add-version symbol value))
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329 ((eq keyword :link)
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330 (custom-add-link symbol value))
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331 ((eq keyword :load)
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332 (custom-add-load symbol value))
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333 ((eq keyword :tag)
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334 (put symbol 'custom-tag value))
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335 (t
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336 (signal 'error (list "Unknown keyword" keyword)))))
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337
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338 (defun custom-add-option (symbol option)
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339 "To the variable SYMBOL add OPTION.
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340
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341 If SYMBOL is a hook variable, OPTION should be a hook member.
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342 For other types variables, the effect is undefined."
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343 (let ((options (get symbol 'custom-options)))
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344 (unless (member option options)
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345 (put symbol 'custom-options (cons option options)))))
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346
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347 (defun custom-add-link (symbol widget)
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348 "To the custom option SYMBOL add the link WIDGET."
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349 (let ((links (get symbol 'custom-links)))
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350 (unless (member widget links)
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351 (put symbol 'custom-links (cons widget links)))))
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352
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353 (defun custom-add-version (symbol version)
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354 "To the custom option SYMBOL add the version VERSION."
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355 (put symbol 'custom-version version))
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356
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357 (defun custom-add-load (symbol load)
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358 "To the custom option SYMBOL add the dependency LOAD.
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359 LOAD should be either a library file name, or a feature name."
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360 (puthash symbol t custom-group-hash-table)
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361 (let ((loads (get symbol 'custom-loads)))
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362 (unless (member load loads)
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363 (put symbol 'custom-loads (cons load loads)))))
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364
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365 ;;; deftheme macro
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366
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367 (defvar custom-known-themes '(user standard)
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368 "Themes that have been defthemed.")
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369
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370 ;; #### add strings for group
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371 ;; #### during bootstrap we cannot use cl-macs stuff
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372 (defun* custom-define-theme (theme feature &optional doc
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373 &key short-description immediate variable-reset-string
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374 variable-set-string face-set-string face-reset-string
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375 &allow-other-keys)
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376 (push theme custom-known-themes)
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377 (put theme 'theme-feature feature)
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378 (put theme 'theme-documentation doc)
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379 (if immediate (put theme 'theme-immediate immediate))
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380 (if variable-reset-string
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381 (put theme 'theme-variable-reset-string variable-reset-string ))
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382 (if variable-set-string
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383 (put theme 'theme-variable-set-string variable-set-string ))
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384 (if face-reset-string
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385 (put theme 'theme-face-reset-string face-reset-string ))
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386 (if face-set-string
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387 (put theme 'theme-face-set-string face-set-string ))
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388 (if short-description
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389 (put theme 'theme-short-description short-description )))
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390
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391 (defun custom-make-theme-feature (theme)
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392 (intern (concat (symbol-name theme) "-theme")))
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393
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394 (defmacro deftheme (theme &rest body)
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395 "(deftheme THEME &optional DOC &key KEYWORDS)
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396
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397 Define a theme labeled by SYMBOL THEME. The optional argument DOC is a
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398 doc string describing the the theme. It is optionally followed by the
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399 following keyboard arguments
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400
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401 :short-description DESC
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402 DESC is a short (one line) description of the theme. If not given DOC
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403 is used.
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404 :immediate FLAG
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405 If FLAG is non-nil variables set in this theme are bound
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406 immediately when loading the theme.
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407 :variable-set-string VARIABLE_-SET-STRING
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408 A string used by the UI to indicate that the value takes it
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409 setting from this theme. It is passed to FORMAT with the
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410 name of the theme a additional argument.
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411 If not given, a generic description is used.
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412 :variable-reset-string VARIABLE-RESET-STRING
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413 As above but used in the case the variable has been forced to
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414 the value in this theme.
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415 :face-set-string FACE-SET-STRING
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416 :face-reset-string FACE-RESET-STRING
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417 As above but for faces."
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418 (let ((feature (custom-make-theme-feature theme)))
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419 `(custom-define-theme (quote ,theme) (quote ,feature) ,@body)))
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420
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421 (defsubst custom-theme-p (theme)
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422 "Non-nil when THEME has been defined."
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423 (memq theme custom-known-themes))
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424
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425 (defsubst custom-check-theme (theme)
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426 "Check whether THEME is valid and signal an error if NOT"
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427 (unless (custom-theme-p theme)
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428 (error "Unknown theme `%s'" theme)))
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429
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430
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431 ; #### do we need to deftheme 'user and/or 'standard here to make the
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432 ; code in cus-edit cleaner?.
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433
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434 ;;; Initializing.
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435
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436 (defun custom-push-theme (prop symbol theme mode value)
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437 (let ((old (get symbol prop)))
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438 (if (eq (car-safe (car-safe old)) theme)
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439 (setq old (cdr old)))
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440 (put symbol prop (cons (list theme mode value) old))))
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441
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442 (defun custom-set-variables (&rest args)
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443 "Initialize variables according to user preferences.
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444 The settings are registered as theme `user'.
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445 The arguments should be a list where each entry has the form:
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446
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447 (SYMBOL VALUE [NOW [REQUEST [COMMENT]]])
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448
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449 The unevaluated VALUE is stored as the saved value for SYMBOL.
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450 If NOW is present and non-nil, VALUE is also evaluated and bound as
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451 the default value for the SYMBOL.
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452 REQUEST is a list of features we must 'require for SYMBOL.
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453 COMMENT is a comment string about SYMBOL."
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454 (apply 'custom-theme-set-variables 'user args))
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455
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456 (defun custom-theme-set-variables (theme &rest args)
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457 "Initialize variables according to settings specified by args.
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458 Records the settings as belonging to THEME.
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459
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460 See `custom-set-variables' for a description of the arguments ARGS."
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461 (custom-check-theme theme)
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462 (let ((immediate (get theme 'theme-immediate)))
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463 (while args * etc/custom/example-themes/example-theme.el:
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464 (let ((entry (car args)))
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465 (if (listp entry)
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466 (let* ((symbol (nth 0 entry))
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467 (value (nth 1 entry))
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468 (now (nth 2 entry))
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469 (requests (nth 3 entry))
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470 (comment (nth 4 entry))
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471 (set (or (get symbol 'custom-set) 'set-default)))
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472 (put symbol 'saved-value (list value))
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473 (custom-push-theme 'theme-value symbol theme 'set value)
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474 (put symbol 'saved-variable-comment comment)
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475 (cond ((or now immediate)
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476 ;; Rogue variable, set it now.
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477 (put symbol 'force-value (if now 'rogue 'immediate))
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478 (funcall set symbol (eval value)))
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479 ((default-boundp symbol)
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480 ;; Something already set this, overwrite it.
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481 (funcall set symbol (eval value))))
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482 (and (or now (default-boundp symbol))
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483 (put symbol 'variable-comment comment))
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484 (when requests
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485 (put symbol 'custom-requests requests)
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486 (mapc 'require requests))
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487 (setq args (cdr args)))
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488 ;; Old format, a plist of SYMBOL VALUE pairs.
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489 (message "Warning: old format `custom-set-variables'")
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490 (ding)
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491 (sit-for 2)
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492 (let ((symbol (nth 0 args))
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493 (value (nth 1 args)))
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494 (put symbol 'saved-value (list value))
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495 (custom-push-theme 'theme-value symbol theme 'set value))
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496 (setq args (cdr (cdr args))))))))
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497
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498 (defvar custom-loaded-themes nil
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499 "Themes in the order they are loaded.")
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500
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501 (defun custom-theme-loaded-p (theme)
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502 "Return non-nil when THEME has been loaded."
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503 (memq theme custom-loaded-themes))
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504
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505 (defun provide-theme (theme)
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506 "Indicate that this file provides THEME."
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507 (custom-check-theme theme)
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508 (provide (get theme 'theme-feature))
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509 (push theme custom-loaded-themes))
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510
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511 (defun require-theme (theme &optional soft)
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512 "Try to load a theme by requiring its feature."
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513 ;; Note we do no check for validity of the theme here.
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514 ;; This allows to pull in themes by a file-name convention
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515 (require (get theme 'theme-feature (custom-make-theme-feature theme))))
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516
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517 (defun custom-do-theme-reset (theme)
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518 ; #### untested! slow!
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519 (let (spec-list)
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520 (mapatoms (lambda (symbol)
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521 (setq spec-list (get symbol 'theme-value))
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522 (when spec-list
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523 (setq spec-list (delete-if (lambda (elt)
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524 (eq (car elt) theme))
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525 spec-list))
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526 (put symbol 'theme-value spec-list)
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527 (custom-theme-reset-internal symbol 'user))
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528 (setq spec-list (get symbol 'theme-face))
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529 (when spec-list
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530 (setq spec-list (delete-if (lambda (elt)
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531 (eq (car elt) theme))
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532 spec-list))
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533 (put symbol 'theme-face spec-list)
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534 (custom-theme-reset-internal-face symbol 'user))))))
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535
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536 (defun custom-theme-load-themes (by-theme &rest body)
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537 "Load the themes specified by BODY and record them as required by
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538 theme BY-THEME. BODY is a secuence of
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539 - a SYMBOL
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540 require the theme SYMBOL
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541 - a list (reset THEME)
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542 Undo all the settings made by THEME.
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543 - a list (hidden THEME)
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544 require the THEME but hide it from the user."
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545 (custom-check-theme by-theme)
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546 (dolist (theme body)
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547 (cond ((and (consp theme) (eq (car theme) 'reset))
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548 (custom-do-theme-reset (cadr theme)))
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549 ((and (consp theme) (eq (car theme) 'hidden))
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550 (require-theme (cadr theme))
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551 (unless (custom-theme-loaded-p (cadr theme))
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552 (put (cadr theme) 'theme-hidden t)))
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553 (t
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554 (require-theme theme)
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555 (remprop theme 'theme-hidden)))
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556 (push theme (get by-theme 'theme-loads-themes))))
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557
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558 (defun custom-load-themes (&rest body)
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559 "Load themes for the USER theme as specified by BODY.
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560
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561 BODY is as with custom-theme-load-themes."
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562 (apply #'custom-theme-load-themes 'user body))
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563
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564
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565
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566
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567 (defsubst copy-upto-last (elt list)
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568 "Copy all the elements of the list upto the last occurence of elt"
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569 ;; Is it faster to do more work in C than to do less in elisp?
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570 (nreverse (cdr (member elt (reverse list)))))
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571
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572 (defun custom-theme-value (theme theme-spec-list)
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573 "Determine the value for THEME defined by THEME-SPEC-LIST.
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574 Returns (list value) if found. Nil otherwise."
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575 ;; Note we do _NOT_ singal an error if the theme is unkown
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576 ;; it might have gone away without the user knowing.
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577 (let ((theme-or-lower (memq theme (cons 'user custom-loaded-themes)))
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578 value)
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579 (mapc #'(lambda (theme-spec)
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580 (when (member (car theme-spec) theme-or-lower)
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581 (setq value (cdr theme-spec))
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582 ;; We need to continue because if theme =A and we found
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583 ;; B then if the load order is B A C B
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584 ;; we actually want the value in C.
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585 (setq theme-or-lower (copy-upto-last (car theme-spec)
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586 theme-or-lower))
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587 ;; We could should circuit if this is now nil.
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588 ))
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589 theme-spec-list)
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590 (if value
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591 (if (eq (car value) 'set)
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592 (list (cadr value))
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593 ;; Yet another reset spec. car value = reset
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594 (custom-theme-value (cadr value) theme-spec-list)))))
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595
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596
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597 (defun custom-theme-variable-value (variable theme)
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598 "Return (list value) value of VARIABLE in THEME if the THEME modifies the
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599 VARIABLE. Nil otherwise."
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600 (custom-theme-value theme (get variable 'theme-value)))
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601
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602 (defun custom-theme-reset-internal (symbol to-theme)
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603 (let ((value (custom-theme-variable-value symbol to-theme))
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604 was-in-theme)
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605 (setq was-in-theme value)
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606 (setq value (or value (get symbol 'standard-value)))
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607 (when value
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608 (put symbol 'saved-value was-in-theme)
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609 (if (or (get 'force-value symbol) (default-boundp symbol))
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610 (funcall (get symbol 'custom-set 'set-default) symbol
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611 (eval (car value)))))
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612 value))
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613
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614
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615 (defun custom-theme-reset-variables (theme &rest args)
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616 "Reset the value of the variables to values previously defined.
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617 Assosiate this setting with THEME.
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618
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619 ARGS is a list of lists of the form
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620
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621 (variable to-theme)
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622
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623 This means reset variable to its value in to-theme."
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624 (custom-check-theme theme)
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625 (mapc #'(lambda (arg)
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626 (apply #'custom-theme-reset-internal arg)
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627 (custom-push-theme 'theme-value (car arg) theme 'reset (cadr arg)))
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628 args))
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629
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630 (defun custom-reset-variables (&rest args)
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631 "Reset the value of the variables to values previously defined.
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632 Assosiate this setting with the `user' theme.
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633
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634 The ARGS are as in `custom-theme-reset-variables'."
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635 (apply #'custom-theme-reset-variables 'user args))
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636
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637
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638 ;;; The End.
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639
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640 (provide 'custom)
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641
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642 ;; custom.el ends here
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