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1 ;;; xrdb-mode.el --- mode for editing X resource database files
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2
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3 ;; Author: 1994-1997 Barry A. Warsaw
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4 ;; Maintainer: tools-help@python.org
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5 ;; Created: May 1994
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6 ;; Version: 1.17
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7 ;; Last Modified: 1997/02/21 22:28:59
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8 ;; Keywords: data languages
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9
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10 ;; Copyright (C) 1994 Barry A. Warsaw
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11
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12 ;; This file is not part of GNU Emacs.
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13
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14 ;; This program is free software; you can redistribute it and/or modify
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15 ;; it under the terms of the GNU General Public License as published by
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16 ;; the Free Software Foundation; either version 2 of the License, or
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17 ;; (at your option) any later version.
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18 ;;
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19 ;; This program is distributed in the hope that it will be useful,
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20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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22 ;; GNU General Public License for more details.
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23 ;;
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24 ;; You should have received a copy of the GNU General Public License
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25 ;; along with this program; if not, write to the Free Software
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26 ;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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27
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28 ;;; Commentary:
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29 ;;
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30 ;; In 1994 I wrote:
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31 ;;
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32 ;; "I used to be like you. I used to hack on X resource database files
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33 ;; all the time, and when I did, I found this mode to be fairly
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34 ;; useful. It's by no means perfect. At one time I had a collection
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35 ;; of hacks that did some nice indentation of resource lines, but
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36 ;; they were not organized in any way. This mode was my attempt to
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37 ;; congeal this mess into a proper major mode. I release it now, not
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38 ;; because it will change your life, but because I don't plan to do
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39 ;; anything more with it.
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40 ;;
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41 ;; I have since been enlightened and no longer have to cavort with
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42 ;; mere mortal X hackers anymore. I like my brain cells, so now I
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43 ;; use NEXTSTEP where all is glory. Or would you say I traded one
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44 ;; vice for another? Hmm... Anyway, if you are still down in the
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45 ;; trenches and would like to inherit this file, let me know. I
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46 ;; don't intend to do any work on it any more... unless I lose my
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47 ;; place in paradise. I promise to be good, Steve. :-) :-)"
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48 ;;
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49 ;; I have fallen from grace.
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50
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51 ;; Code:
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52
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53
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54 ;; These variables are available for your customization
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55 (defvar xrdb-mode-hook nil
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56 "*Hook to be run when `xrdb-mode' is entered.")
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57
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58 (defvar xrdb-subdivide-by 'paragraph
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59 "*Extent of alignment calculations.
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60 Can be one of `buffer', `paragraph', `page', or `line'. Do a
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61 \\[describe-function] xrdb-indent-buffer RET for more information.")
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62
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63
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64
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65 ;; no need to customize anything below this line
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66 (defconst xrdb-comment-re "^[ \t]*[!]"
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67 "Character which starts a comment.")
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68 (defconst xrdb-separator-char ?:
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69 "Character which separates resource specs from values.")
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70
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71
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72 ;; utilities
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73 (defsubst xrdb-point (position)
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74 ;; Returns the value of point at certain commonly referenced POSITIONs.
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75 ;; POSITION can be one of the following symbols:
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76 ;;
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77 ;; bol -- beginning of line
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78 ;; eol -- end of line
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79 ;; bod -- beginning of defun
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80 ;; boi -- back to indentation
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81 ;; ionl -- indentation of next line
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82 ;; iopl -- indentation of previous line
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83 ;; bonl -- beginning of next line
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84 ;; bopl -- beginning of previous line
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85 ;; bop -- beginning of paragraph
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86 ;; eop -- end of paragraph
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87 ;; bopg -- beginning of page
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88 ;; eopg -- end of page
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89 ;;
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90 ;; This function does not modify point or mark.
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91 (let ((here (point)))
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92 (cond
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93 ((eq position 'bol) (beginning-of-line))
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94 ((eq position 'eol) (end-of-line))
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95 ((eq position 'boi) (back-to-indentation))
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96 ((eq position 'bonl) (forward-line 1))
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97 ((eq position 'bopl) (forward-line -1))
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98 ((eq position 'bop) (forward-paragraph -1))
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99 ((eq position 'eop) (forward-paragraph 1))
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100 ((eq position 'bopg) (forward-page -1))
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101 ((eq position 'eopg) (forward-page 1))
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102 (t
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103 (error "unknown buffer position requested: %s" position)))
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104 (prog1
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105 (point)
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106 (goto-char here))
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107 ))
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108
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109 (defsubst xrdb-skip-to-separator ()
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110 ;; skip forward from the beginning of the line to the separator
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111 ;; character as given by xrdb-separator-char. Returns t if the
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112 ;; char was found, otherwise, nil.
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113 (beginning-of-line)
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114 (skip-chars-forward
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115 (concat "^" (char-to-string xrdb-separator-char))
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116 (xrdb-point 'eol))
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117 (= (following-char) xrdb-separator-char))
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118
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119
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120
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121 ;; commands
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122 (defun xrdb-electric-separator (arg)
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123 "Insert the separator character.
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124 Re-align the line unless an argument is given."
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125 (interactive "P")
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126 ;; first insert the character
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127 (self-insert-command (prefix-numeric-value arg))
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128 ;; only do electric behavior if arg is not given
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129 (if (not arg)
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130 (xrdb-align-to (xrdb-point 'bol)
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131 (xrdb-point 'bonl)
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132 (save-excursion
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133 (beginning-of-line)
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134 (forward-comment (- (point-max)))
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135 (beginning-of-line)
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136 (xrdb-skip-to-separator)
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137 (current-column)))))
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138
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139 (defun xrdb-align-to (start end goalcolumn)
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140 (interactive "r\nnAlign to column: ")
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141 (save-excursion
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142 (save-restriction
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143 (narrow-to-region start end)
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144 (beginning-of-buffer)
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145 (while (< (point) (point-max))
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146 (if (and (not (looking-at xrdb-comment-re))
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147 (xrdb-skip-to-separator)
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148 goalcolumn)
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149 (indent-code-rigidly (xrdb-point 'bol)
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150 (xrdb-point 'bonl)
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151 (- goalcolumn (current-column))))
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152 (forward-line 1)))))
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153
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154 (defun xrdb-indent-line (arg)
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155 "Re-align current line."
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156 (interactive "P")
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157 ;; narrow to the region specified by xrdb-subdivide-by
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158 (save-excursion
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159 (save-restriction
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160 (widen)
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161 (cond
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162 ((eq xrdb-subdivide-by 'buffer))
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163 ((eq xrdb-subdivide-by 'page)
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164 (narrow-to-page))
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165 ((eq xrdb-subdivide-by 'paragraph)
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166 (narrow-to-region (xrdb-point 'bop) (xrdb-point 'eop)))
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167 (t
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168 (narrow-to-region (xrdb-point 'bopl) (xrdb-point 'bonl))
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169 ))
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170 ;; indent line
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171 (xrdb-align-to (xrdb-point 'bol) (xrdb-point 'bonl)
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172 (xrdb-region-goal-column))
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173 )))
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174
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175 (defun xrdb-indent-region (start end)
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176 "Re-align region."
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177 (interactive "r")
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178 ;; narrow to region
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179 (save-excursion
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180 (save-restriction
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181 (narrow-to-region start end)
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182 (xrdb-align-to (point-min) (point-max) (xrdb-region-goal-column))
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183 )))
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184
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185 (defun xrdb-indent-page ()
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186 "Re-align the current page."
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187 (interactive)
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188 (save-excursion
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189 (save-restriction
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190 (narrow-to-page)
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191 (xrdb-align-to (point-min) (point-max) (xrdb-region-goal-column))
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192 )))
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193
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194 (defun xrdb-indent-paragraph ()
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195 "Re-align the current paragraph."
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196 (interactive)
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197 (save-excursion
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198 (save-restriction
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199 (narrow-to-region (xrdb-point 'bop) (xrdb-point 'eop))
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200 (xrdb-align-to (point-min) (point-max) (xrdb-region-goal-column))
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201 )))
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202
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203 (defun xrdb-indent-buffer (arg)
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204 "Re-align the entire buffer.
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205 Alignment calculations are controlled by the variable
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206 `xrdb-subdivide-by', which can take the values `buffer', `paragraph',
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207 `page', or `line', with the following meanings:
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208
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209 buffer - all non-comment lines are aligned with the longest line in
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210 the buffer. Since every line must be scanned, this will
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211 take the longest to perform.
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212
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213 paragraph - alignment of lines spanning paragraphs. A paragraph is
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214 defined as all contiguous lines between blank or comment
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215 lines.
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216
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217 page - alignment of lines spanning pages (i.e. separated by
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218 page-delimiter, usually ^L).
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219
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220 none - alignment of lines based on the previous line.
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221
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222 With optional \\[universal-argument], queries for alignment subdivision."
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223 (interactive "P")
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224 (let ((align-by (if (not arg)
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225 xrdb-subdivide-by
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226 (completing-read
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227 "Align by: "
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228 '(("buffer" . buffer)
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229 ("paragraph" . paragraph)
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230 ("page" . page)
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231 ("line" . line))
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232 nil t (format "%s" xrdb-subdivide-by)))))
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233 (message "Aligning by %s..." align-by)
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234 (save-excursion
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235 (save-restriction
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236 (widen)
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237 (cond
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238 ;; by buffer
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239 ((eq align-by 'buffer)
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240 (xrdb-align-to (point-min) (point-max) (xrdb-region-goal-column)))
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241 ;; by paragraph
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242 ((eq align-by 'paragraph)
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243 (beginning-of-buffer)
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244 (while (< (point) (point-max))
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245 (narrow-to-region (point) (xrdb-point 'eop))
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246 (xrdb-align-to (point-min) (point-max) (xrdb-region-goal-column))
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247 (beginning-of-buffer)
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248 (widen)
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249 (forward-paragraph 1)
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250 ))
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251 ;; by page
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252 ((eq align-by 'page)
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253 (beginning-of-buffer)
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254 (while (< (point) (point-max))
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255 (narrow-to-region (point) (xrdb-point 'eopg))
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256 (xrdb-align-to (point-min) (point-max) (xrdb-region-goal-column))
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257 (beginning-of-buffer)
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258 (widen)
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259 (forward-page 1)
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260 ))
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261 ;; by line
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262 (t
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263 (beginning-of-buffer)
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264 (let ((prev-goalcol 0))
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265 (while (< (point) (point-max))
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266 ;; skip comments and blank lines
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267 (if (not (looking-at paragraph-start))
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268 (progn
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269 (xrdb-align-to (xrdb-point 'bol) (xrdb-point 'bonl)
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270 prev-goalcol)
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271 (xrdb-skip-to-separator)
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272 (setq prev-goalcol (- (point) (xrdb-point 'boi)))
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273 ))
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274 (forward-line 1))))
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275 )))
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276 (message "Aligning by %s... done." align-by)
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277 ))
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278
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279
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280 ;; major-mode stuff
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281 (defvar xrdb-mode-abbrev-table nil
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282 "Abbrev table used in `xrdb-mode' buffers.")
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283 (define-abbrev-table 'xrdb-mode-abbrev-table ())
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284
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285
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286 (defvar xrdb-mode-syntax-table nil
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287 "Syntax table used in `xrdb-mode' buffers.")
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288 (if xrdb-mode-syntax-table
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289 ()
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290 (setq xrdb-mode-syntax-table (make-syntax-table))
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291 (modify-syntax-entry ?! "<" xrdb-mode-syntax-table)
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292 (modify-syntax-entry ?\n ">" xrdb-mode-syntax-table))
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293
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294
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295 (defvar xrdb-mode-map ()
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296 "Keymap used in `xrdb-mode' buffers.")
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297 (if xrdb-mode-map
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298 ()
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299 (setq xrdb-mode-map (make-sparse-keymap))
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300 (let ((ekey (char-to-string xrdb-separator-char)))
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301 ;; make the separator key electric
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302 (define-key xrdb-mode-map ekey 'xrdb-electric-separator)
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303 (define-key xrdb-mode-map "\t" 'xrdb-indent-line)
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304 (define-key xrdb-mode-map "\C-c\C-a" 'xrdb-indent-paragraph)
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305 (define-key xrdb-mode-map "\C-c\C-b" 'xrdb-submit-bug-report)
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306 (define-key xrdb-mode-map "\C-c\C-p" 'xrdb-indent-page)
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307 (define-key xrdb-mode-map "\C-c\C-r" 'xrdb-indent-region)
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308 (define-key xrdb-mode-map "\C-c\C-u" 'xrdb-indent-buffer)
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309 (define-key xrdb-mode-map "\C-c>" 'xrdb-align-to)
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310 ))
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311
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312 (defun xrdb-mode ()
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313 "Major mode for editing xrdb config files"
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314 (interactive)
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315 (kill-all-local-variables)
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316 (set-syntax-table xrdb-mode-syntax-table)
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317 (setq major-mode 'xrdb-mode
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318 mode-name "xrdb"
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319 local-abbrev-table xrdb-mode-abbrev-table)
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320 (use-local-map xrdb-mode-map)
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321 ;; local variables
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322 (make-local-variable 'parse-sexp-ignore-comments)
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323 (make-local-variable 'comment-start)
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324 (make-local-variable 'comment-end)
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325 (make-local-variable 'paragraph-start)
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326 (make-local-variable 'paragraph-separate)
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327 (make-local-variable 'paragraph-ignore-fill-prefix)
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328 ;; now set their values
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329 (setq parse-sexp-ignore-comments t
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330 comment-start "! "
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331 comment-end "")
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332 (setq indent-region-function 'xrdb-indent-region
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333 paragraph-ignore-fill-prefix t
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334 paragraph-start (concat "^[ \t]*$\\|^[ \t]*[!]\\|" page-delimiter)
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335 paragraph-separate paragraph-start)
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336 (run-hooks 'xrdb-mode-hook))
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337
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338
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339
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340 ;; faces and font-locking
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341 (require 'font-lock)
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342 (make-face 'xrdb-option-name-face)
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343 (make-face 'xrdb-option-value-face)
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344 (or (face-differs-from-default-p 'xrdb-option-name-face)
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345 (copy-face 'font-lock-keyword-face 'xrdb-option-name-face))
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346 (or (face-differs-from-default-p 'xrdb-option-value-face)
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347 (copy-face 'font-lock-string-face 'xrdb-option-value-face))
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348
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349 (defvar xrdb-font-lock-keywords
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350 (list '("^[ \t]*\\([^\n:]*:\\)[ \t]*\\(.*\\)$"
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351 (1 xrdb-option-name-face)
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352 (2 xrdb-option-value-face)))
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353 "Additional expressions to highlight in Xrdb mode.")
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354
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355 (put 'xrdb-mode 'font-lock-defaults '(xrdb-font-lock-keywords nil))
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356
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357
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358
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359 ;; commands
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360 (defun xrdb-region-goal-column ()
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361 ;; Returns the goal column of the current region. Assumes the
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362 ;; buffer has been narrowed to the region to scan.
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363 (save-excursion
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364 (beginning-of-buffer)
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365 (let ((goalcol -1)
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366 linecol)
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367 (while (< (point) (point-max))
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368 ;; skip any comments
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369 (if (and (not (looking-at xrdb-comment-re))
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370 (xrdb-skip-to-separator)
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371 (< goalcol (setq linecol (current-column)))
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372 )
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373 (setq goalcol linecol))
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374 (forward-line 1))
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375 (if (< goalcol 0)
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376 nil
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377 goalcol))))
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378
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379
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380
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381 ;; submitting bug reports
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382
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383 (defconst xrdb-version "1.17"
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384 "xrdb-mode version number.")
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385
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386 (defconst xrdb-mode-help-address "tools-help@python.org"
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387 "Address for xrdb-mode bug reports.")
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388
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389 (eval-when-compile
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390 (require 'reporter))
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391
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392 (defun xrdb-submit-bug-report ()
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393 "Submit via mail a bug report on xrdb-mode."
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394 (interactive)
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395 ;; load in reporter
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396 (let ((reporter-prompt-for-summary-p t)
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397 (varlist '(xrdb-subdivide-by
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398 xrdb-mode-hook
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399 )))
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400 (and (if (y-or-n-p "Do you want to submit a report on xrdb-mode? ")
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401 t
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402 (message "")
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403 nil)
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404 (require 'reporter)
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405 (reporter-submit-bug-report
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406 xrdb-mode-help-address "xrdb-mode" varlist nil nil "Dear Barry,")
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407 )))
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408
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409
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410 (provide 'xrdb-mode)
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411 ;; xrdb-mode.el ends here
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