annotate lisp/disp-table.el @ 5637:a366601407c2

Add an explicit autoload for #'cl-compile-time-init, bytecomp.el. 2012-01-02 Aidan Kehoe <kehoea@parhasard.net> * bytecomp.el (cl-compile-time-init): Add an autoload for this, some code supplies -no-autoloads when byte-compiling, making it necessary.
author Aidan Kehoe <kehoea@parhasard.net>
date Mon, 02 Jan 2012 16:52:59 +0000
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1 ;;; disp-table.el --- functions for dealing with char tables.
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3 ;; Copyright (C) 1987, 1994, 1997, 2007 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1995 Sun Microsystems.
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5 ;; Copyright (C) 2005 Ben Wing.
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6
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7 ;; Maintainer: XEmacs Development Team
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8 ;; Keywords: i18n, internal
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9
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10 ;; This file is part of XEmacs.
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11
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12 ;; XEmacs is free software: you can redistribute it and/or modify it
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13 ;; under the terms of the GNU General Public License as published by the
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14 ;; Free Software Foundation, either version 3 of the License, or (at your
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15 ;; option) any later version.
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17 ;; XEmacs is distributed in the hope that it will be useful, but WITHOUT
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18 ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 ;; for more details.
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22 ;; You should have received a copy of the GNU General Public License
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23 ;; along with XEmacs. If not, see <http://www.gnu.org/licenses/>.
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24
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25 ;;; Synched up with: Not synched with FSF.
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26
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27 ;;; Commentary:
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28
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29 ;; Rewritten for XEmacs July 1995, Ben Wing.
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30 ;; November 1998?, display tables generalized to char/range tables, Hrvoje
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31 ;; Niksic.
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32 ;; July 2007, rewrite this file to handle generalized display tables,
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33 ;; Aidan Kehoe.
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34
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35 ;;; Code:
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36
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37 ;;;###autoload
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38 (defun make-display-table ()
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39 "Return a new, empty display table.
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40
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41 This returns a generic character table; previously it returned a vector, but
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42 that was not helpful when dealing with internationalized characters above
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43 ?\xFF. See `make-char-table' for details of character tables in general. To
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44 write code that works with both vectors and character tables, add something
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45 like the following to the beginning of your file, and use
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46 `put-display-table' to set what a given character is displayed as, and
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47 `get-display-table' to examine what that character is currently displayed
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48 as:
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49
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50 \(defun-when-void put-display-table (range value display-table)
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51 \"Set the value for char RANGE to VALUE in DISPLAY-TABLE. \"
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52 (if (sequencep display-table)
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53 (aset display-table range value)
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54 (put-char-table range value display-table)))
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55
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56 \(defun-when-void get-display-table (character display-table)
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57 \"Find value for CHARACTER in DISPLAY-TABLE. \"
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58 (if (sequencep display-table)
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59 (aref display-table character)
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60 (get-char-table character display-table)))
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61
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62 In this implementation, `put-display-table' and `get-display-table' are
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63 aliases of `put-char-table' and `get-char-table' respectively, and are
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64 always available."
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65 (make-char-table 'generic))
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66
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67 ;;;###autoload
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68 (defalias 'put-display-table #'put-char-table)
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69
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70 ;;;###autoload
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71 (defalias 'get-display-table #'get-char-table)
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72
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73 (defun describe-display-table (dt)
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74 "Describe the display table DT in a help buffer."
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75 (with-displaying-help-buffer
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76 (lambda ()
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77 (map-char-table
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78 (lambda (range value)
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79 (cond
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80 ((eq range t)
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81 (princ "\nAll characters: \n")
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82 (princ (format " %S" value)))
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83 ((eq 'charset (and (symbolp range) (type-of (find-charset range))))
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84 (princ (format "\n\nCharset %S: \n" (charset-name range)))
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85 (princ (format " %S" value)))
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86 ((vectorp range)
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87 (princ (format "\n\nCharset %S, row %d \n"
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88 (charset-name (aref value 0))
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89 (aref value 1)))
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90 (princ (format " %S\n\n" value)))
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91 ((characterp range)
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92 (princ (format "\nCharacter U+%04X, %S: "
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93 range (if (fboundp 'split-char)
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94 (split-char range)
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95 (list 'ascii (char-to-int range)))))
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96 (princ (format " %S" value))))
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97 nil) dt)
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98 (princ
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99 "\n\nFor some of the various other glyphs that GNU Emacs uses the display
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100 table for, see the XEmacs specifiers `truncation-glyph' ,
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101 `continuation-glyph', `control-arrow-glyph', `octal-escape-glyph' and the
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102 others described in the docstring of `make-glyph'. \n\n"))))
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103
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104
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105 ;;;###autoload
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106 (defun describe-current-display-table (&optional domain)
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107 "Describe the display table in use in the selected window and buffer."
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108 (interactive)
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109 (or domain (setq domain (selected-window)))
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110 (let ((disptab (specifier-instance current-display-table domain)))
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111 (if disptab
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112 (describe-display-table disptab)
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113 (message "No display table"))))
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114
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115 ;; #### we need a generic frob-specifier function.
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116 ;; #### this also needs to be redone like frob-face-property.
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117
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118 ;; Let me say one more time how much dynamic scoping sucks.
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119
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120 ;; #### Need more thinking about basic primitives for modifying a specifier.
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121 ;; cf `modify-specifier-instances'.
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122
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123 ;;;###autoload
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124 (defun frob-display-table (fdt-function fdt-locale &optional tag-set)
219
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125 (or fdt-locale (setq fdt-locale 'global))
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126 (or (specifier-spec-list current-display-table fdt-locale tag-set)
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127 (add-spec-to-specifier current-display-table (make-display-table)
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128 fdt-locale tag-set))
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129 (add-spec-list-to-specifier
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130 current-display-table
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131 (list (cons fdt-locale
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132 (mapcar
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133 (lambda (fdt-x)
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134 (funcall fdt-function (cdr fdt-x))
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135 fdt-x)
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136 (cdar (specifier-spec-list current-display-table
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137 fdt-locale tag-set)))))))
219
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138
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139 (defun standard-display-8bit-1 (dt l h)
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140 (while (<= l h)
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141 (remove-char-table (int-to-char l) dt)
219
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142 (setq l (1+ l))))
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143
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144 ;;;###autoload
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145 (defun standard-display-8bit (l h &optional locale)
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146 "Display characters in the range L to H literally [sic].
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147
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148 GNU Emacs includes this function. There, `literally' has no good meaning.
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149 Under XEmacs, this function makes characters with numeric values in the
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150 range L to H display as themselves; that is, as ASCII, latin-iso8859-1,
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151 latin-iso8859-2 or whatever. See `standard-display-default' for the inverse
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152 function. "
219
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153 (frob-display-table
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154 (lambda (x)
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155 (standard-display-8bit-1 x l h))
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156 locale))
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157
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158 (defun standard-display-default-1 (dt l h)
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159 "Misnamed function under XEmacs. See `standard-display-default'."
219
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160 (while (<= l h)
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161 (put-char-table (int-to-char l) (format "\\%o" l) dt)
219
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162 (setq l (1+ l))))
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163
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164 ;;;###autoload
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165 (defun standard-display-default (l h &optional locale)
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166 "Display characters in the range L to H using octal escape notation.
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167
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168 In the XEmacs context this function is misnamed. Under GNU Emacs,
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169 characters in the range #xA0 to #xFF display as octal escapes unless
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170 `standard-display-european' has been called; this function neutralizes the
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171 effects of `standard-display-european'. Under XEmacs, those characters
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172 normally do not display as octal escapes (this ignores hackery like
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173 specifying the X11 font character set on non-Mule builds) and this function
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174 sets them to display as octal escapes. "
219
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175 (frob-display-table
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176 (lambda (x)
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177 (standard-display-default-1 x l h))
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178 locale))
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179
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180 ;;;###autoload
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181 (defun standard-display-ascii (c s &optional locale)
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182 "Display character C using printable string S."
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183 (frob-display-table
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184 (lambda (x)
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185 (put-char-table c s x))
219
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186 locale))
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187
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188 ;;;###autoload
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189 (defun standard-display-g1 (c sc &optional locale)
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190 "Display character C as character SC in the g1 character set.
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191 This only has an effect on TTY devices and assumes that your terminal uses
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192 the SO/SI characters."
219
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193 (frob-display-table
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194 (lambda (x)
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195 (put-char-table c (concat "\016" (char-to-string sc) "\017") x))
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196 locale '(tty)))
219
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197
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198 ;;;###autoload
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199 (defun standard-display-graphic (c gc &optional locale)
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200 "Display character C as character GC in graphics character set.
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201 This only has an effect on TTY devices and assumes VT100-compatible escapes."
219
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202 (frob-display-table
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203 (lambda (x)
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204 (put-char-table c (concat "\e(0" (char-to-string gc) "\e(B") x))
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205 locale '(tty)))
219
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206
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207 ;;;###autoload
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208 (defun standard-display-underline (c uc &optional locale)
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209 "Display character C as character UC plus underlining."
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210 (frob-display-table
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211 (lambda (x)
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212 (let (glyph)
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213 (setq glyph (make-glyph (vector 'string :data (char-to-string uc))))
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214 (set-glyph-face glyph 'underline)
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215 (put-char-table c glyph x)))
219
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216 locale))
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217
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218 ;;;###autoload
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219 (defun standard-display-european (arg &optional locale)
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220 "Toggle display of European characters encoded with ISO 8859-1.
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221 When enabled (the default), characters in the range of 160 to 255 display
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222 as accented characters. With negative prefix argument, display characters in
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223 that range as octal escapes.
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224
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225 If you want to work in a Western European language under XEmacs, it
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226 shouldn't be necessary to call this function--things should just work. But
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227 it's in a sufficient number of init files that we're not in a hurry to
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228 remove it. "
219
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229 (interactive "P")
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230 (if (<= (prefix-numeric-value arg) 0)
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231 (frob-display-table
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232 (lambda (x)
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233 (standard-display-default-1 x 160 255))
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234 locale)
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235 (frob-display-table
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236 (lambda (x)
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237 (standard-display-8bit-1 x 160 255))
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238 locale)))
219
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239
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240 (provide 'disp-table)
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241
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242 ;;; disp-table.el ends here