annotate lisp/cus-face.el @ 4940:9113c5044de8

(for main branch) add long comment about types of magic symbols -------------------- ChangeLog entries follow: -------------------- src/ChangeLog addition: 2010-01-20 Ben Wing <ben@xemacs.org> * symbols.c: Add long comment about the types of magic symbols, and the various declarations that go along with them.
author Ben Wing <ben@xemacs.org>
date Wed, 20 Jan 2010 22:30:33 -0600
parents 69a1eda3da06
children 5502045ec510
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1 ;;; cus-face.el -- Support for Custom faces.
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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
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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 ;;; Synched with: Not synched.
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12
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13 ;;; Commentary:
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14 ;;
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15 ;; See `custom.el'.
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16
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17 ;;; Code:
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18
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19 ;; it is now safe to put the `provide' anywhere. if an error occurs while
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20 ;; loading, all provides (and fsets) will be undone. put it first to
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21 ;; prevent require/provide loop with custom and cus-face.
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22 (provide 'cus-face)
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23 (require 'custom)
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24
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25 ;; To elude the warnings for font functions.
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26 (eval-when-compile
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27 (require 'font))
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28
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29 ;;; Declaring a face.
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30
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31 ;;;###autoload
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32 (defun custom-declare-face (face spec doc &rest args)
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33 "Like `defface', but FACE is evaluated as a normal argument."
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34 ;; (when (fboundp 'pureload)
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35 ;; (error "Attempt to declare a face during dump"))
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36 ;; #### should we possibly reset force-face here?
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37 (unless (get face 'face-defface-spec)
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38 (put face 'face-defface-spec spec)
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39 (unless (find-face face)
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40 ;; If the user has already created the face, respect that.
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41 (let ((value (or (get face 'saved-face) spec))
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42 (frames (relevant-custom-frames))
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43 frame)
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44 ;; Create global face.
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45 (make-empty-face face)
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46 (face-display-set face value nil '(custom))
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47 ;; Create frame local faces
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48 (while frames
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49 (setq frame (car frames)
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50 frames (cdr frames))
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51 (face-display-set face value frame '(custom)))
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52 (init-face-from-resources face)))
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53 ;; Don't record SPEC until we see it causes no errors.
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54 (put face 'face-defface-spec spec)
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55 (push (cons 'defface face) current-load-list)
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56 (when (and doc (null (face-doc-string face)))
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57 (set-face-doc-string face doc))
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58 (custom-handle-all-keywords face args 'custom-face)
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59 (run-hooks 'custom-define-hook))
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60 face)
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61
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62 ;;; Font Attributes.
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63
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64 ;; Consider adding the stuff in the XML font model here.
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65 (defconst custom-face-attributes
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66 '((:foreground (color :tag "Foreground"
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67 :value ""
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68 :help-echo "Set foreground color.")
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69 set-face-foreground face-foreground-name)
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70 (:background (color :tag "Background"
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71 :value ""
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72 :help-echo "Set background color.")
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73 set-face-background face-background-name)
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74 (:size (editable-field :format "Size: %v"
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75 :help-echo "\
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76 Text size (e.g. 9pt or 2mm).")
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77 custom-set-face-font-size custom-face-font-size)
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78 (:family (editable-field :format "Font Family: %v"
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79 :help-echo "\
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80 Name of font family to use (e.g. times).")
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81 custom-set-face-font-family custom-face-font-family)
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82 (:background-pixmap (editable-field :format "Background pixmap: %v"
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83 :help-echo "\
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84 Name of background pixmap file.")
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85 set-face-background-pixmap custom-face-background-pixmap)
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86 (:dim (toggle :format "%[Dim%]: %v\n"
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87 :help-echo "Control whether the text should be dimmed.")
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88 set-face-dim-p face-dim-p)
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89 (:bold (toggle :format "%[Bold%]: %v\n"
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90 :help-echo "Control whether a bold font should be used.")
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91 custom-set-face-bold custom-face-bold)
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92 (:italic (toggle :format "%[Italic%]: %v\n"
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93 :help-echo "\
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94 Control whether an italic font should be used.")
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95 custom-set-face-italic custom-face-italic)
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96 (:underline (toggle :format "%[Underline%]: %v\n"
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97 :help-echo "\
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98 Control whether the text should be underlined.")
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99 set-face-underline-p face-underline-p)
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100 (:strikethru (toggle :format "%[Strikethru%]: %v\n"
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101 :help-echo "\
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102 Control whether the text should be strikethru.")
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103 set-face-strikethru-p face-strikethru-p)
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104 (:inverse-video (toggle :format "%[Inverse Video%]: %v\n"
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105 :help-echo "\
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106 Control whether the text should be inverted. Works only on TTY-s")
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107 set-face-reverse-p face-reverse-p)
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108 (:inherit
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109 (repeat :tag "Inherit"
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110 :help-echo "List of faces to inherit attributes from."
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111 (face :Tag "Face" default))
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112 ;; FSF 21.3
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113 ; ;; filter to make value suitable for customize
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114 ; (lambda (real-value)
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115 ; (cond ((or (null real-value) (eq real-value 'unspecified))
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116 ; nil)
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117 ; ((symbolp real-value)
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118 ; (list real-value))
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119 ; (t
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120 ; real-value)))
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121 ; ;; filter to make customized-value suitable for storing
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122 ; (lambda (cus-value)
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123 ; (if (and (consp cus-value) (null (cdr cus-value)))
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124 ; (car cus-value)
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125 ; cus-value))
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126 custom-set-face-inherit custom-face-inherit))
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127 "Alist of face attributes.
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128
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129 The elements are lists of the form (KEY TYPE SET GET) where:
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130 KEY is a symbol identifying the attribute.
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131 TYPE is a widget type for editing the attribute.
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132 SET is a function for setting the attribute value.
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133 GET is a function for getting the attribute value.
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134
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135 The SET function should take three arguments: the face to modify, the
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136 value of the attribute, and optionally the frame where the face should
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137 be changed.
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138
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139 The GET function should take two arguments, the face to examine, and
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140 optionally the frame where the face should be examined.")
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141
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142 (defun face-custom-attributes-set (face frame tags &rest atts)
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143 "For FACE on FRAME set the attributes [KEYWORD VALUE]....
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144 Each keyword should be listed in `custom-face-attributes'.
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145
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146 If FRAME is nil, set the default face."
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147 (while atts
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148 (let* ((name (nth 0 atts))
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149 (value (nth 1 atts))
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150 (fun (nth 2 (assq name custom-face-attributes))))
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151 (setq atts (cdr (cdr atts)))
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152 (condition-case nil
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153 (funcall fun face value frame tags)
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154 (error nil)))))
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155
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156 (defun face-custom-attributes-get (face frame)
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157 "For FACE on FRAME get the attributes [KEYWORD VALUE]....
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158 Each keyword should be listed in `custom-face-attributes'.
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159
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160 If FRAME is nil, use the default face."
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161 (condition-case nil
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162 ;; Attempt to get `font.el' from w3.
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163 (require 'font)
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164 (error nil))
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165 (let ((atts custom-face-attributes)
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166 att result get)
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167 (while atts
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168 (setq att (car atts)
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169 atts (cdr atts)
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170 get (nth 3 att))
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171 (condition-case nil
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172 ;; This may fail if w3 doesn't exist.
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173 (when get
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174 (let ((answer (funcall get face frame)))
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175 (unless (equal answer (funcall get 'default frame))
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176 (when (widget-apply (nth 1 att) :match answer)
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177 (setq result (cons (nth 0 att) (cons answer result)))))))
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178 (error nil)))
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179 result))
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180
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181 (defsubst custom-face-get-spec (symbol)
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182 (or (get symbol 'customized-face)
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183 (get symbol 'saved-face)
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184 (get symbol 'face-defface-spec)
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185 ;; Attempt to construct it.
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186 (list (list t (face-custom-attributes-get
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187 symbol (selected-frame))))))
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188
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189 (defun custom-set-face-bold (face value &optional frame tags)
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190 "Set the bold property of FACE to VALUE."
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191 (if value
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192 (make-face-bold face frame tags)
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193 (make-face-unbold face frame tags)))
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194
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195 ;; Really, we should get rid of these font.el dependencies... They
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196 ;; are still presenting a problem with dumping the faces (font.el is
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197 ;; too bloated for us to dump). I am thinking about hacking up
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198 ;; font-like functionality myself for the sake of this file. It will
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199 ;; probably be to-the-point and more efficient.
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200
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201 (defun custom-face-bold (face &rest args)
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202 "Return non-nil if the font of FACE is bold."
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203 (let* ((font (apply 'face-font-name face args))
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204 ;; Gag
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205 (fontobj (font-create-object font)))
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206 (font-bold-p fontobj)))
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207
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208 (defun custom-set-face-italic (face value &optional frame tags)
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209 "Set the italic property of FACE to VALUE."
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210 (if value
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211 (make-face-italic face frame tags)
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212 (make-face-unitalic face frame tags)))
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213
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214 (defun custom-face-italic (face &rest args)
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215 "Return non-nil if the font of FACE is italic."
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216 (let* ((font (apply 'face-font-name face args))
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217 ;; Gag
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218 (fontobj (font-create-object font)))
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219 (font-italic-p fontobj)))
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220
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221 (defun custom-face-background-pixmap (face &rest args)
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222 "Return the name of the background pixmap file used for FACE."
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223 (let ((image (apply 'specifier-instance
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224 (face-background-pixmap face) args)))
444
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225 (and image
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226 (image-instance-file-name image))))
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227
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228 (defun custom-set-face-inherit (face value &optional frame tags)
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229 "Set FACE to inherit its properties from another face."
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230 (if (listp value) (setq value (car value))) ;; #### Temporary hack!
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231 (if (find-face value)
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232 (set-face-parent face value frame tags)))
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233
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234 (defun custom-face-inherit (face &rest args)
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235 "Return the value (instance) of the `inherit' property for FACE."
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236 ;; #### Major, temporary hack!
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237 (let ((spec (apply 'specifier-instantiator
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238 (face-font face) args)))
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239 (and spec (vector spec) (aref spec 0))))
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240
707
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241 ;; This consistently fails to dtrt
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242 ;;(defun custom-set-face-font-size (face size &optional locale tags)
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243 ;; "Set the font of FACE to SIZE."
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244 ;; ;; #### should this call have tags in it?
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245 ;; (let* ((font (apply 'face-font-name face (list locale)))
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246 ;; ;; Gag
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247 ;; (fontobj (font-create-object font)))
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248 ;; (set-font-size fontobj size)
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249 ;; (apply 'font-set-face-font face fontobj locale tags)))
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250
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251 ;; From Jan Vroonhof -- see faces.el
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252 (defun custom-set-face-font-size (face size &optional locale tags)
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253 "Set the font of FACE to SIZE."
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254 (make-face-size face size locale tags))
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255
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256 (defun custom-face-font-size (face &rest args)
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257 "Return the size of the font of FACE as a string."
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258 (let* ((font (apply 'face-font-name face args))
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259 ;; Gag
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260 (fontobj (font-create-object font)))
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261 (format "%s" (font-size fontobj))))
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262
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263 ;; Jan suggests this may not dtrt
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264 ;;(defun custom-set-face-font-family (face family &optional locale tags)
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265 ;; "Set the font of FACE to FAMILY."
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266 ;; ;; #### should this call have tags in it?
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267 ;; (let* ((font (apply 'face-font-name face (list locale)))
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268 ;; ;; Gag
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269 ;; (fontobj (font-create-object font)))
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270 ;; (set-font-family fontobj family)
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271 ;; (apply 'font-set-face-font face fontobj locale tags)))
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272
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273 ;; From Jan Vroonhof -- see faces.el
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274 (defun custom-set-face-font-family (face family &optional locale tags)
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275 "Set the font of FACE to FAMILY."
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276 (make-face-family face family locale tags))
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277
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278 (defun custom-face-font-family (face &rest args)
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279 "Return the name of the font family of FACE."
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280 (let* ((font (apply 'face-font-name face args))
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281 ;; Gag
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282 (fontobj (font-create-object font)))
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283 (font-family fontobj)))
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284
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285 ;;;###autoload
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286 (defun custom-set-face-update-spec (face display plist)
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287 "Customize the FACE for display types matching DISPLAY, merging
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288 in the new items from PLIST."
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289 (let ((spec (face-spec-update-all-matching (custom-face-get-spec face)
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290 display plist)))
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291 (put face 'customized-face spec)
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292 (face-spec-set face spec nil '(custom))))
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293
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294 ;;; Initializing.
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295
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296 ;;;###autoload
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297 (defun custom-set-faces (&rest args)
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298 "Initialize faces according to user preferences.
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299 This asociates the setting with the USER theme.
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300 The arguments should be a list where each entry has the form:
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301
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302 (FACE SPEC [NOW [COMMENT]])
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303
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304 SPEC will be stored as the saved value for FACE. If NOW is present
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305 and non-nil, FACE will also be created according to SPEC.
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306 COMMENT is a string comment about FACE.
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307
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308 See `defface' for the format of SPEC."
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309 (apply #'custom-theme-set-faces 'user args))
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310
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311 ;;;###autoload
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312 (defun custom-theme-set-faces (theme &rest args)
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313 "Initialize faces according to settings specified by args.
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314 Records the settings as belonging to THEME.
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315
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316 See `custom-set-faces' for a description of the arguments ARGS."
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317 (custom-check-theme theme)
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318 (let ((immediate (get theme 'theme-immediate)))
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319 (while args
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320 (let ((entry (car args)))
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321 (if (listp entry)
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322 (let ((face (nth 0 entry))
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323 (spec (nth 1 entry))
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324 (now (nth 2 entry))
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325 (comment (nth 3 entry)))
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326 (put face 'saved-face spec)
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327 (custom-push-theme 'theme-face face theme 'set spec)
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328 (put face 'saved-face-comment comment)
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329 (when (or now immediate)
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330 (put face 'force-face (if now 'rogue 'immediate)))
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331 (when (or now immediate (find-face face))
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332 (put face 'face-comment comment)
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333 (unless (find-face face)
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334 (make-empty-face face))
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335 (face-spec-set face spec nil '(custom)))
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336 (setq args (cdr args)))
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337 ;; Old format, a plist of FACE SPEC pairs.
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338 (let ((face (nth 0 args))
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339 (spec (nth 1 args)))
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340 (put face 'saved-face spec)
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341 (custom-push-theme 'theme-face face theme 'set spec))
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342 (setq args (cdr (cdr args))))))))
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343
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344 ;;;###autoload
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345 (defun custom-theme-face-value (face theme)
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346 "Return spec of FACE in THEME if the THEME modifies the
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347 FACE. Nil otherwise."
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348 (car-safe (custom-theme-value theme (get face 'theme-face))))
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349
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350 (defun custom-theme-reset-internal-face (face to-theme)
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351 (let ((spec (custom-theme-face-value face to-theme))
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352 was-in-theme)
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353 (setq was-in-theme spec)
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354 (setq spec (or spec (get face 'standard-value)))
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355 (when spec
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356 (put face 'save-face was-in-theme)
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357 (when (or (get face 'force-face) (find-face face))
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358 (unless (find-face face)
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359 (make-empty-face face))
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360 (face-spec-set face spec)))
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361 spec))
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362
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363 ;;;###autoload
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364 (defun custom-theme-reset-faces (theme &rest args)
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365 "Reset the value of the face to values previously defined.
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366 Associate this setting with THEME.
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367
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368 ARGS is a list of lists of the form
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369
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370 (face to-theme)
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371
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372 This means reset face to its value in to-theme."
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1c2a46ea1f78 [xemacs-hg @ 2007-02-22 16:53:20 by stephent]
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373 (custom-check-theme theme)
428
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374 (mapc #'(lambda (arg)
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375 (apply #'custom-theme-reset-internal-face arg)
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376 (custom-push-theme (car arg) 'theme-face theme 'reset (cadr arg)))
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377 args))
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378
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379 ;;;###autoload
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380 (defun custom-reset-faces (&rest args)
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381 "Reset the value of the face to values previously defined.
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382 Associate this setting with the 'user' theme.
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383
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384 ARGS is defined as for `custom-theme-reset-faces'."
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385 (apply #'custom-theme-reset-faces 'user args))
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386
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387
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388 ;;; The End.
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389
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390 ;; cus-face.el ends here