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1 ;;; whitespace-mode.el -- minor mode for making whitespace visible
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2
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3 ;; Copyright (C) 1994, 1995, 1996 Heiko Muenkel
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4
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5 ;; Author: Heiko Muenkel <muenkel@tnt.uni-hannover.de>
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6 ;; Keywords: modes, extensions
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7
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8 ;; This file is part of XEmacs.
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9
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10 ;; XEmacs is free software; you can redistribute it and/or modify it
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11 ;; under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your
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13 ;; option) any later version.
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14
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15 ;; XEmacs is distributed in the hope that it will be useful, but
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16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 ;; General Public License for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs; if not, write to the Free Software
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22 ;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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23 ;; 02111-1307, USA.
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24
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25 ;;; Synched up with: FSF 19.34.
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26
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27 ;;; Commentary:
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28
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177
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29 ;; $Id: whitespace-mode.el,v 1.4 1997/07/26 22:09:50 steve Exp $
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30 ;; Description:
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31 ;;
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32 ;; This is a minor mode, which highlights whitespaces (blanks and
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33 ;; tabs) with different faces, so that it is easier to
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34 ;; distinguish between them.
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35 ;; Toggle the mode with: M-x whitespace-mode
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36 ;; or with: M-x whitespace-incremental-mode
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37 ;; The second one should be used in big files.
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38 ;;
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39 ;; If you want to know how the whitespaces are highlighted then
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40 ;; type: M-x whitespace-show-faces
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41 ;;
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42 ;; There are 2 hook variables `whitespace-incremental-mode-hook'
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43 ;; and `whitespace-mode-hook' to customize the mode.
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44 ;;
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45 ;; Look at the variable `whitespace-chars', if you only want to
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46 ;; highlight tabs or blanks and not both.
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47 ;;
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48 ;; Set `whitespace-install-toolbar-icon' to t, if you want a
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49 ;; toolbar icon for this mode.
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50 ;;
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51 ;; Set `whitespace-install-submenu' to t, if you want a submenu
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52 ;; for this mode. Sorry, at the moment there is no menu for the
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53 ;; Emacs 19.
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54 ;;
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55 ;; Thanks to Mike Scheidler for the toolbar icon code.
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56 ;;
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57 ;; Installation:
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58 ;;
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59 ;; Put the files whitespace-mode.el and adapt.el in one of your
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60 ;; load-path directories and the following lines (without the
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61 ;; comment signs) in your .emacs (adapt.el is already in the
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62 ;; XEmacs 19.12).
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63 ;;
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64 ;; (autoload 'whitespace-mode "whitespace-mode"
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65 ;; "Toggle whitespace mode.
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66 ;; With arg, turn whitespace mode on iff arg is positive.
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67 ;; In whitespace mode the different whitespaces (tab, blank return)
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68 ;; are highlighted with different faces. The faces are:
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69 ;; `whitespace-blank-face', `whitespace-tab-face' and
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70 ;; `whitespace-return-face'."
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71 ;; t)
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72 ;;
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73 ;; (autoload 'whitespace-incremental-mode "whitespace-mode"
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74 ;; "Toggle whitespace incremental mode.
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75 ;; With arg, turn whitespace incremental mode on iff arg is positive.
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76 ;; In whitespace incremental mode the different whitespaces (tab and
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77 ;; blank) are highlighted with different faces. The faces are:
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78 ;; `whitespace-blank-face' and `whitespace-tab-face'.
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79 ;; Use the command `whitespace-show-faces' to show their values.
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80 ;; In this mode only these tabs and blanks are highlighted, which are in
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81 ;; the region from (point) - (window-heigh) to (point) + (window-heigh)."
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82
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83 ;;; Code:
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84
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85 (provide 'whitespace-mode)
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86 (require 'adapt)
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87
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88 ;;; variables:
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89
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134
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90 (defgroup whitespace nil
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91 "Minor mode for making whitespace visible"
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92 :group 'outlines
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93 :group 'matching)
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94
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95
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96 (defcustom whitespace-chars 'tabs-and-blanks
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100
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97 "*Determines, which whitespaces are highlighted.
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98 Valid values are:
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99 'tabs-and-blanks => tabs and blanks are highlighted;
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100 'tabs => only tabs are highlighted;
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101 'blanks => only blanks are highlighted;.
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102
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103 Changing this variable during the whitespace-*-mode is active could lead
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134
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104 to wrong highlighted whitespaces."
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105 :type '(radio (const tabs-and-blanks)
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106 (const tabs)
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107 (const blanks))
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108 :group 'whitespace)
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109
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110 (make-variable-buffer-local 'whitespace-chars)
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111
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134
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112 (defcustom whitespace-mode-hook nil
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113 "*Run after the `whitespace-mode' is switched on."
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114 :type 'hook
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115 :group 'whitespace)
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116
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117 (defcustom whitespace-incremental-mode-hook nil
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118 "*Run after the `whitespace-incremental-mode' is switched on."
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119 :type 'hook
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120 :group 'whitespace)
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121
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122
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123 (if (adapt-xemacsp)
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124 (progn
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125
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134
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126 (defcustom whitespace-install-toolbar-icon nil
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127 "Set it to t, if a toolbar icon should be installed during loading this file.
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134
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128 The icon calls the function 'whitespace-toolbar-function'."
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129 :type 'boolean
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130 :group 'whitespace)
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131
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134
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132 (defcustom whitespace-install-submenu nil
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133 "Set it to t, if a submenu should be installed during loading this file."
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134 :type 'boolean
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135 :group 'whitespace)
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136
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137 ))
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138
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139
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134
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140 (defcustom whitespace-toolbar-function 'whitespace-incremental-mode
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100
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141 "*The toolbar icon for the whitespace mode calls this function.
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134
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142 Valid values are: 'whitespace--mode and 'whitespace-incremental-mode."
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143 :type 'function
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144 :group 'whitespace)
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145
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134
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146 (defcustom whitespace-blank-and-tab-search-string "\\( \\)\\|\\(\t\\)"
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147 "The regexp used to search for tabs and blanks."
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148 :type 'regexp
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149 :group 'whitespace)
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150
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134
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151 (defcustom whitespace-tab-search-string "\t"
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152 "The search string used to find tabs."
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153 :type 'string
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154 :group 'whitespace)
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155
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134
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156 (defcustom whitespace-blank-search-string " "
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157 "The search string used to find blanks."
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158 :type 'string
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159 :group 'whitespace)
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160
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134
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161 (defface whitespace-blank-face
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162 '((t
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163 (:background "LightBlue1")))
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164 "Face to show blanks with"
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165 :group 'whitespace)
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166
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134
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167 (defface whitespace-tab-face
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168 '((t
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169 (:background "yellow" :underline t)))
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170 "Face to show TABs with"
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171 :group 'whitespace)
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172
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173 (defun whitespace-show-faces ()
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174 "Shows the faces used by the `whitespace-mode'."
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175 (interactive)
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176 (save-excursion
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177 (let ((actual-buffer-name (buffer-name (current-buffer)))
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178 (actual-whitespace-chars whitespace-chars)
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179 (whitespace-mode-active (or whitespace-mode
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180 whitespace-incremental-mode))
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181 (buffer (get-buffer-create "*Help*")))
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182 (set-buffer buffer)
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183 (setq whitespace-chars actual-whitespace-chars)
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184 (delete-region (point-min) (point-max))
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185 (insert "In the whitespace minor mode\n"
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186 " this \" ")
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187 (whitespace-highlight-region (1- (point)) (point))
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188 (insert "\" is a blank, highlighted with `whitespace-blank-face' and\n"
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189 " this \"\t")
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190 (whitespace-highlight-region (1- (point)) (point))
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191 (insert "\" is a tab, highlighted with `whitespace-tab-face'.")
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192
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193 (newline 2)
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194 (if (eq whitespace-chars 'blanks)
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195 (insert
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196 "The highlighting of tabs is switched off.\n")
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197 (if (eq whitespace-chars 'tabs)
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198 (insert
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199 "The highlighting of blanks is switched off.\n")))
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200 (newline)
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201 (if whitespace-mode-active
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202 (insert "A whitespace minor mode is active in the buffer\n "
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203 actual-buffer-name
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204 ".\n")
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205 (insert "No whitespace minor mode is active in the buffer\n "
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206 actual-buffer-name
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207 ".\n"))
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208 (show-temp-buffer-in-current-frame buffer)
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209 )))
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210
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211 ;;;
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212 (defun whitespace-highlight-chars-in-region (char-string from to face)
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213 "Highlights the CHAR-STRING in the region from FROM to TO with the FACE."
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214 (while (search-forward char-string end t)
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215 (let ((extent))
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216 (cond ((match-beginning 0)
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217 (setq extent (make-extent (match-beginning 0) (match-end 0)))
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218 (set-extent-face extent face)
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219 ))
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220 (set-extent-property extent 'start-open t)
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221 (set-extent-property extent 'end-open t)
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222 )))
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223
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224 (defun whitespace-highlight-region (from to)
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225 "Highlights the whitespaces in the region from FROM to TO."
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226 (let ((start (min from to))
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227 (end (max from to)))
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228 (save-excursion
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229 ;; (message "Highlighting tabs and blanks...")
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230 (goto-char start)
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231 (cond ((eq whitespace-chars 'tabs-and-blanks)
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232 (while (search-forward-regexp
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233 whitespace-blank-and-tab-search-string end t)
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234 (let ((extent))
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235 (cond ((match-beginning 1) ; blanks ?
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236 (setq extent (make-extent (match-beginning 1)
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237 (match-end 1)))
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238 (set-extent-face extent 'whitespace-blank-face)
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239 )
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240 ((match-beginning 2) ; tabs ?
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241 (setq extent (make-extent (match-beginning 2)
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242 (match-end 2)))
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243 (set-extent-face extent 'whitespace-tab-face)
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244 )
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245 )
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246 (set-extent-property extent 'start-open t)
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247 (set-extent-property extent 'end-open t)
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248 )))
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249 ((eq whitespace-chars 'tabs)
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250 (whitespace-highlight-chars-in-region whitespace-tab-search-string
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251 from
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252 to
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253 'whitespace-tab-face))
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254 ((eq whitespace-chars 'blanks)
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255 (whitespace-highlight-chars-in-region
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256 whitespace-blank-search-string
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257 from
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258 to
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259 'whitespace-blank-face))
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260 (t (error "ERROR: Bad value of whitespace-highlight-char")))
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261 ;; (message "")
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262 )))
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263
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264 (defun whitespace-highlight-buffer ()
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265 "Highlights the whitespaces in the current buffer."
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266 (whitespace-highlight-region (point-min) (point-max))
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267 )
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268
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269 (defsubst whitespace-find-next-highlighted-region (from to)
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270 "Returns nil or the next highlighted region."
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271 (map-extents '(lambda (extent dummy)
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272 (if (extent-property extent 'whitespace-highlighted-region)
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273 extent))
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274 nil
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275 from
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276 to))
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277
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278 (defun whitespace-incremental-highlight (from to)
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279 "Highligthts the region from FROM to TO incremental."
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280 (save-excursion
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281 (goto-char from)
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282 (let ((extent (extent-at (point) nil 'whitespace-highlighted-region))
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283 (next-extent nil)
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284 (start nil))
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285 (while (< (point) to)
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286 (if extent
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287 (goto-char (extent-end-position extent)))
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288 (if (< (point) to)
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289 (progn
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290 (setq start (point))
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291
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292 (setq next-extent (whitespace-find-next-highlighted-region
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293 start
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294 to))
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295 (if extent
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296 (if next-extent
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297 (progn
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298 (set-extent-endpoints extent
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299 (extent-start-position extent)
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300 (extent-end-position next-extent)
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301 )
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302 (whitespace-highlight-region start
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303 (1-
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304 (extent-start-position
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305 next-extent)))
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306 (delete-extent next-extent))
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307 (set-extent-endpoints extent
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308 (extent-start-position extent)
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309 to)
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310 (whitespace-highlight-region start to))
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311 (if next-extent
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312 (progn
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313 (setq extent next-extent)
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314 (whitespace-highlight-region start
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315 (1- (extent-start-position
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316 next-extent)))
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317 (set-extent-endpoints extent
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318 start
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319 (extent-end-position next-extent)))
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320 (setq extent (make-extent start to))
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321 (set-extent-property extent 'whitespace-highlighted-region t)
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322 (whitespace-highlight-region start to)))
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323 ))))))
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324
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325
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326 (defun whitespace-highlight-window ()
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327 "Highlights the whitespaces in the current window."
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328 (whitespace-incremental-highlight (save-excursion
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329 (forward-line (- (window-height)))
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330 (point))
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331 (save-excursion
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332 (forward-line (window-height))
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333 (point))))
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334
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335 (defun whitespace-dehighlight-region (start end)
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336 "Dehighlights the whitespaces in the region from START to END."
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337 (map-extents '(lambda (extent dummy)
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338 (if (or (eq (extent-face extent) 'whitespace-blank-face)
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339 (eq (extent-face extent) 'whitespace-tab-face)
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340 (extent-property extent
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341 'whitespace-highlighted-region))
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342 (progn
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343 (delete-extent extent)
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344 nil)))
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345 nil
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346 start
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347 end
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348 )
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349 )
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350
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351 (defun whitespace-dehighlight-buffer ()
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352 "Dehighlights the whitespaces in the current buffer."
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353 (whitespace-dehighlight-region (point-min) (point-max))
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354 )
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355
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356 (defun whitespace-highlight-after-change-function (beg end old-len)
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357 "Called, when any modification is made to buffer text. Highlights
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358 the whitespaces (blanks and tabs) in the region from BEG to
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359 END. OLD-LEN isn't used, but provided from the after-change hook."
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360 (if (or (eq beg end)
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361 (null whitespace-mode))
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362 nil
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363 (whitespace-dehighlight-region beg end)
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364 (whitespace-highlight-region beg end)))
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365
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366 (defvar whitespace-mode nil
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367 "Non-nil, if the `whitespace-mode' is active.")
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368
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369 (make-variable-buffer-local 'whitespace-mode)
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370
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371 (defun whitespace-mode (&optional arg)
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372 "Toggle whitespace mode.
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373 With arg, turn whitespace mode on iff arg is positive.
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374 In whitespace mode the different whitespaces (tab and blank)
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375 are highlighted with different faces. The faces are:
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376 `whitespace-blank-face' and `whitespace-tab-face'.
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377 Use the command `whitespace-show-faces' to show their values."
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378 (interactive "P")
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379 (setq whitespace-mode
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380 (if (null arg) (not whitespace-mode)
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381 (> (prefix-numeric-value arg) 0)))
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382 (if (and whitespace-mode whitespace-incremental-mode)
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383 (progn
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384 (whitespace-incremental-highlight (point-min) (point-max))
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385 (setq whitespace-incremental-mode nil)
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386 (remove-hook 'post-command-hook 'whitespace-highlight-window)
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387 (run-hooks 'whitespace-mode-hook)
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388 )
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389 (setq whitespace-incremental-mode nil)
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390 (remove-hook 'post-command-hook 'whitespace-highlight-window)
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391 (redraw-modeline) ;(force-mode-line-update)
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392 (if whitespace-mode
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393 (progn
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394 (whitespace-highlight-buffer)
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395 (make-local-variable 'after-change-functions)
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396 (add-hook 'after-change-functions
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397 'whitespace-highlight-after-change-function)
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398 (run-hooks 'whitespace-mode-hook))
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399 (whitespace-dehighlight-buffer)
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400 (remove-hook 'after-change-functions
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401 'whitespace-highlight-after-change-function)
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402 (remove-hook 'post-command-hook 'whitespace-highlight-window)
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403 )))
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404
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405 (defvar whitespace-incremental-mode nil
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406 "Non-nil, if the `whitespace-incremental-mode' is active.")
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407
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408 (make-variable-buffer-local 'whitespace-incremental-mode)
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409
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410 (defun whitespace-incremental-mode (&optional arg)
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411 "Toggle whitespace incremental mode.
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412 With arg, turn whitespace incremental mode on iff arg is positive.
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413 In whitespace incremental mode the different whitespaces (tab and blank)
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414 are highlighted with different faces. The faces are:
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415 `whitespace-blank-face' and `whitespace-tab-face'.
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416 Use the command `whitespace-show-faces' to show their values.
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417 In this mode only these tabs and blanks are highlighted, which are in
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418 the region from (point) - (window-heigh) to (point) + (window-heigh)."
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419 (interactive "P")
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420 (setq whitespace-incremental-mode
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421 (if (null arg) (not whitespace-incremental-mode)
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422 (> (prefix-numeric-value arg) 0)))
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423 (if (and whitespace-mode whitespace-incremental-mode)
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424 (set-extent-property (make-extent (point-min) (point-max))
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425 'whitespace-highlighted-region
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426 t))
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427 (setq whitespace-mode nil)
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428 (redraw-modeline) ;(force-mode-line-update)
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429 ;(set-buffer-modified-p (buffer-modified-p)) ;No-op, but updates mode line.
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430 (if whitespace-incremental-mode
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431 (progn
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432 (whitespace-highlight-window)
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433 (make-local-variable 'post-command-hook)
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434 (add-hook 'post-command-hook 'whitespace-highlight-window)
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435 (make-local-variable 'after-change-functions)
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436 (add-hook 'after-change-functions
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437 'whitespace-highlight-after-change-function)
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438 (run-hooks 'whitespace-incremental-mode-hook))
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439 (whitespace-dehighlight-buffer)
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440 (remove-hook 'after-change-functions
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441 'whitespace-highlight-after-change-function)
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442 (remove-hook 'post-command-hook 'whitespace-highlight-window)
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443 ))
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444
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445
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446 ;;; Add whitespace-mode and whitespace-incremental-mode to the minor-mode-alist
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447
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448 (or (assq 'whitespace-mode minor-mode-alist)
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449 (setq minor-mode-alist
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450 (cons '(whitespace-mode " WSP") minor-mode-alist)))
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451
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452 (or (assq 'whitespace-incremental-mode minor-mode-alist)
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453 (setq minor-mode-alist
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454 (cons '(whitespace-incremental-mode " WSPI") minor-mode-alist)))
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455
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456
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457 ;;; Menu for the whitespace mode
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458
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459 (defun whitespace-set-whitespace-chars (new-whitespace-chars)
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460 "Sets the variable `whitespace-chars' and activates the change."
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461 (interactive (list (read (completing-read "Whitespaces to highlight: "
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462 '(("tabs-and-blanks")
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463 ("tabs")
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464 ("blanks"))
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465 nil
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466 t
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467 (symbol-name 'whitespace-chars)))))
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468 (if (eq whitespace-chars new-whitespace-chars)
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469 nil ; nothing to do
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470 (setq whitespace-chars new-whitespace-chars)
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471 (setq-default whitespace-chars new-whitespace-chars)
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472 (cond (whitespace-mode (whitespace-mode)
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473 (whitespace-mode))
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474 (whitespace-incremental-mode (whitespace-incremental-mode)
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475 (whitespace-incremental-mode))
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476 )))
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477
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478 (defvar whitespace-menu nil
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479 "A menu for the whitespace minor mode.")
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480
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481 (setq whitespace-menu
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482 '("Whitespace Menu"
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483 ["Highlight Whitespaces"
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484 whitespace-mode
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485 :style toggle
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486 :selected whitespace-mode]
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487 ["Incremental Highlighting"
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488 whitespace-incremental-mode
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489 :style toggle
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490 :selected whitespace-incremental-mode
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491 ]
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492 "---"
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493 ["Show Whitespace Faces" whitespace-show-faces t]
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494 "---"
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495 ["Highlight Tabs & Blanks"
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496 (whitespace-set-whitespace-chars 'tabs-and-blanks)
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497 :style radio
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498 :selected (eq whitespace-chars 'tabs-and-blanks)]
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499 ["Highlight Only Tabs"
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500 (whitespace-set-whitespace-chars 'tabs)
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501 :style radio
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502 :selected (eq whitespace-chars 'tabs)]
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503 ["Highlight Only Blanks"
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504 (whitespace-set-whitespace-chars 'blanks)
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505 :style radio
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506 :selected (eq whitespace-chars 'blanks)]
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507 ))
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508
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509 (if (and (boundp 'whitespace-install-submenu) whitespace-install-submenu)
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510 (add-submenu '("Apps") whitespace-menu))
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511
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512 ;;; Toolbar icon for the XEmacs
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513
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514 (if (featurep 'toolbar)
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515
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516 (defvar toolbar-wspace-icon
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517 (toolbar-make-button-list
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518 "/* XPM */
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519 static char * whitespace[] = {
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520 \"28 28 4 1\",
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521 \" c Gray75 s backgroundToolBarColor\",
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522 \". c black\",
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523 \"X c Gray60\",
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524 \"o c white\",
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525 \" \",
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526 \" \",
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527 \" \",
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528 \" \",
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529 \" .. . \",
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530 \" XXX.XXXXXX . \",
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531 \" Xoo.oooooXX . \",
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532 \" .. .. ..o.o..oo..X... .. \",
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533 \" . . X.o..o.ooX. X. . . \",
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534 \" . . .oo.oo.ooX.XX. .... \",
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535 \" ... .oo.oo.ooo.oo. . \",
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536 \" . .Xoo.oo.ooo.oo. . . \",
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537 \" . .Xo...o..o...o.. .. \",
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538 \" XooooooooooooX \",
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539 \" XooooooooooooX \",
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540 \" .... ....ooo...ooo... .. \",
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541 \" . . .oo.o.oo.oo.oX. . . \",
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542 \" . .oo.ooo..oo.oX .... \",
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543 \" .. .oo.o..o.oo.oX . \",
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544 \" . . .oo.o.oo.oo.oX. . . \",
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545 \" .... ...oo.....oo.. .. \",
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546 \" .ooooooooooooX \",
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547 \" .XXXXXXXXXXXXX \",
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548 \" . \",
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549 \" ... \",
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550 \" \",
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551 \" \",
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552 \" \"
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553 };")
|
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554 "A whitespace icon.")
|
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|
555 )
|
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556
|
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557 (defun whitespace-toolbar-function ()
|
|
|
558 "Calls the function determined by `whitespace-toolbar-function'."
|
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559 (interactive)
|
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560 (call-interactively whitespace-toolbar-function))
|
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561
|
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562 (if (and (adapt-xemacsp)
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563 whitespace-install-toolbar-icon
|
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177
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564 (featurep 'toolbar)
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100
|
565 (eq (device-type (selected-device)) 'x))
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177
|
566 (let ((tb (mapcar #'(lambda (e)
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567 (elt e 1)) (specifier-instance default-toolbar))))
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568 (and (not (member 'whitespace-toolbar-function tb))
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569 (toolbar-add-item
|
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570 [toolbar-wspace-icon whitespace-toolbar-function
|
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|
571 t "Toggle whitespace mode"]
|
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572 (let ((n (or
|
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573 (position 'toolbar-replace tb)
|
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574 (position 'toolbar-undo tb)
|
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575 (position 'toolbar-paste tb)
|
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576 (position 'toolbar-copy tb)
|
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577 (position 'toolbar-cut tb))))
|
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578 (if n (1+ n) (length tb)))))))
|
|
100
|
579
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580 ;;; whitespace-mode.el ends here
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