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209
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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@srce.hr>
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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 ;;; Commentary:
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12 ;;
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13 ;; See `custom.el'.
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14
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15 ;; This file should probably be dissolved, and code moved to faces.el,
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16 ;; like Stallman did.
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17
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18 ;;; Code:
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19
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20 (require 'custom)
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21
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22 ;; To elude the warnings for font functions.
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23 (eval-when-compile
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24 (require 'font))
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25
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26 ;;; Declaring a face.
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27
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28 ;;;###autoload
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29 (defun custom-declare-face (face spec doc &rest args)
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30 "Like `defface', but FACE is evaluated as a normal argument."
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31 ;; (when (fboundp 'load-gc)
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32 ;; (error "Attempt to declare a face during dump"))
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33 (unless (get face 'face-defface-spec)
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34 (put face 'face-defface-spec spec)
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35 (unless (find-face face)
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36 ;; If the user has already created the face, respect that.
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37 (let ((value (or (get face 'saved-face) spec))
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38 (frames (relevant-custom-frames))
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39 frame)
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40 ;; Create global face.
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41 (make-empty-face face)
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42 (face-display-set face value)
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43 ;; Create frame local faces
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44 (while frames
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45 (setq frame (car frames)
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46 frames (cdr frames))
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47 (face-display-set face value frame))
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48 (init-face-from-resources face)))
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49 (when (and doc (null (face-doc-string face)))
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50 (set-face-doc-string face doc))
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51 (custom-handle-all-keywords face args 'custom-face)
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52 (run-hooks 'custom-define-hook))
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53 face)
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54
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55 ;;; Font Attributes.
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56
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57 (defconst custom-face-attributes
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58 '((:bold (boolean :tag "Bold"
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59 :help-echo "Control whether a bold font should be used.")
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60 custom-set-face-bold custom-face-bold)
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61 (:italic (boolean :tag "Italic"
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62 :help-echo "\
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63 Control whether an italic font should be used.")
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64 custom-set-face-italic custom-face-italic)
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65 (:underline (boolean :tag "Underline"
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66 :help-echo "\
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67 Control whether the text should be underlined.")
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68 set-face-underline-p face-underline-p)
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69 (:foreground (color :tag "Foreground"
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70 :value ""
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71 :help-echo "Set foreground color.")
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72 set-face-foreground face-foreground-name)
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73 (:background (color :tag "Background"
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74 :value ""
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75 :help-echo "Set background color.")
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76 set-face-background face-background-name)
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77 ;; #### Should make it work on X
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78 (:inverse-video (boolean :tag "Inverse"
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79 :help-echo "\
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80 Control whether the text should be inverted. Works only on TTY-s")
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81 set-face-reverse-p face-reverse-p)
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82 (:stipple (editable-field :format "Stipple: %v"
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83 :help-echo "Name of background bitmap file.")
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84 set-face-background-pixmap custom-face-stipple)
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85 (:family (editable-field :format "Font Family: %v"
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86 :help-echo "\
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87 Name of font family to use (e.g. times).")
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88 custom-set-face-font-family custom-face-font-family)
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89 (:size (editable-field :format "Size: %v"
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90 :help-echo "\
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91 Text size (e.g. 9pt or 2mm).")
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92 custom-set-face-font-size custom-face-font-size)
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93 (:strikethru (toggle :format "%[Strikethru%]: %v\n"
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94 :help-echo "\
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95 Control whether the text should be strikethru.")
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96 set-face-strikethru-p face-strikethru-p))
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97 "Alist of face attributes.
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98
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99 The elements are of the form (KEY TYPE SET GET) where KEY is a symbol
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100 identifying the attribute, TYPE is a widget type for editing the
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101 attibute, SET is a function for setting the attribute value, and GET is a function for getiing the attribute value.
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102
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103 The SET function should take three arguments, the face to modify, the
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104 value of the attribute, and optionally the frame where the face should
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105 be changed.
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106
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107 The GET function should take two arguments, the face to examine, and
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108 optonally the frame where the face should be examined.")
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109
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110 (defun face-custom-attributes-set (face frame &rest atts)
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111 "For FACE on FRAME set the attributes [KEYWORD VALUE]....
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112 Each keyword should be listed in `custom-face-attributes'.
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113
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114 If FRAME is nil, set the default face."
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115 (while atts
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116 (let* ((name (nth 0 atts))
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117 (value (nth 1 atts))
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118 (fun (nth 2 (assq name custom-face-attributes))))
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119 (setq atts (cdr (cdr atts)))
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120 (condition-case nil
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121 (funcall fun face value frame)
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122 (error nil)))))
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123
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124 (defun face-custom-attributes-get (face frame)
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125 "For FACE on FRAME get the attributes [KEYWORD VALUE]....
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126 Each keyword should be listed in `custom-face-attributes'.
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127
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128 If FRAME is nil, use the default face."
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129 (condition-case nil
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130 ;; Attempt to get `font.el' from w3.
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131 (require 'font)
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132 (error nil))
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133 (let ((atts custom-face-attributes)
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134 att result get)
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135 (while atts
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136 (setq att (car atts)
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137 atts (cdr atts)
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138 get (nth 3 att))
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139 (condition-case nil
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140 ;; This may fail if w3 doesn't exists.
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141 (when get
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142 (let ((answer (funcall get face frame)))
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143 (unless (equal answer (funcall get 'default frame))
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144 (when (widget-apply (nth 1 att) :match answer)
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145 (setq result (cons (nth 0 att) (cons answer result)))))))
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146 (error nil)))
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147 result))
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148
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149 (defun custom-set-face-bold (face value &optional frame)
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150 "Set the bold property of FACE to VALUE."
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151 (if value
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152 (make-face-bold face frame)
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153 (make-face-unbold face frame)))
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154
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155 ;; Really, we should get rid of these font.el dependencies... They
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156 ;; are still presenting a problem with dumping the faces (font.el is
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157 ;; too bloated for us to dump). I am thinking about hacking up
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158 ;; font-like functionality myself for the sake of this file. It will
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159 ;; probably be to-the-point and more efficient.
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160
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161 (defun custom-face-bold (face &rest args)
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162 "Return non-nil if the font of FACE is bold."
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163 (let* ((font (apply 'face-font-name face args))
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164 ;; Gag
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165 (fontobj (font-create-object font)))
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166 (font-bold-p fontobj)))
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167
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168 (defun custom-set-face-italic (face value &optional frame)
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169 "Set the italic property of FACE to VALUE."
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170 (if value
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171 (make-face-italic face frame)
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172 (make-face-unitalic face frame)))
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173
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174 (defun custom-face-italic (face &rest args)
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175 "Return non-nil if the font of FACE is italic."
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176 (let* ((font (apply 'face-font-name face args))
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177 ;; Gag
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178 (fontobj (font-create-object font)))
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179 (font-italic-p fontobj)))
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180
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181 (defun custom-face-stipple (face &rest args)
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182 "Return the name of the stipple file used for FACE."
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183 (let ((image (apply 'specifier-instance
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184 (face-background-pixmap face) args)))
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185 (and image
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186 (image-instance-file-name image))))
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187
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188 (defun custom-set-face-font-size (face size &rest args)
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189 "Set the font of FACE to SIZE"
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190 (let* ((font (apply 'face-font-name face args))
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191 ;; Gag
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192 (fontobj (font-create-object font)))
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193 (set-font-size fontobj size)
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194 (apply 'font-set-face-font face fontobj args)))
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195
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196 (defun custom-face-font-size (face &rest args)
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197 "Return the size of the font of FACE as a string."
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198 (let* ((font (apply 'face-font-name face args))
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199 ;; Gag
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200 (fontobj (font-create-object font)))
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201 (format "%s" (font-size fontobj))))
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202
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203 (defun custom-set-face-font-family (face family &rest args)
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204 "Set the font of FACE to FAMILY."
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205 (let* ((font (apply 'face-font-name face args))
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206 ;; Gag
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207 (fontobj (font-create-object font)))
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208 (set-font-family fontobj family)
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209 (apply 'font-set-face-font face fontobj args)))
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210
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211 (defun custom-face-font-family (face &rest args)
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212 "Return the name of the font family of FACE."
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213 (let* ((font (apply 'face-font-name face args))
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214 ;; Gag
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215 (fontobj (font-create-object font)))
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216 (font-family fontobj)))
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217
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218 ;;; Initializing.
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219
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220 ;;;###autoload
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221 (defun custom-set-faces (&rest args)
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222 "Initialize faces according to user preferences.
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223 The arguments should be a list where each entry has the form:
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224
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225 (FACE SPEC [NOW])
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226
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227 SPEC will be stored as the saved value for FACE. If NOW is present
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228 and non-nil, FACE will also be created according to SPEC.
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229
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230 See `defface' for the format of SPEC."
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231 (while args
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232 (let ((entry (car args)))
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233 (if (listp entry)
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234 (let ((face (nth 0 entry))
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235 (spec (nth 1 entry))
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236 (now (nth 2 entry)))
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237 (put face 'saved-face spec)
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238 (when now
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239 (put face 'force-face t))
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240 (when (or now (find-face face))
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241 (unless (find-face face)
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242 (make-empty-face face))
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243 (face-spec-set face spec))
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244 (setq args (cdr args)))
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245 ;; Old format, a plist of FACE SPEC pairs.
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246 (let ((face (nth 0 args))
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247 (spec (nth 1 args)))
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248 (put face 'saved-face spec))
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249 (setq args (cdr (cdr args)))))))
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250
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251 ;;; The End.
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252
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253 (provide 'cus-face)
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254
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255 ;; cus-face.el ends here
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