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108
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1 ;;; Adaptive fill
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2 ;;; Copyright (C) 1989, 1995, 1996, 1997 Kyle E. Jones
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3 ;;;
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4 ;;; This program is free software; you can redistribute it and/or modify
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5 ;;; it under the terms of the GNU General Public License as published by
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6 ;;; the Free Software Foundation; either version 2, or (at your option)
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7 ;;; any later version.
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8 ;;;
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9 ;;; This program is distributed in the hope that it will be useful,
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10 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 ;;; GNU General Public License for more details.
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13 ;;;
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14 ;;; A copy of the GNU General Public License can be obtained from this
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15 ;;; program's author (send electronic mail to kyle@uunet.uu.net) or from
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16 ;;; the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA
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17 ;;; 02139, USA.
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18 ;;;
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108
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19 ;;; Send bug reports to kyle_jones@wonderworks.com
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20
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21 ;; LCD Archive Entry:
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22 ;; filladapt|Kyle Jones|kyle_jones@wonderworks.com|
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23 ;; Minor mode to adaptively set fill-prefix and overload filling functions|
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120
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24 ;; 10-June-1996|2.10|~/packages/filladapt.el|
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25
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26 ;; These functions enhance the default behavior of Emacs' Auto Fill
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108
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27 ;; mode and the commands fill-paragraph, lisp-fill-paragraph,
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28 ;; fill-region-as-paragraph and fill-region.
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29 ;;
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30 ;; The chief improvement is that the beginning of a line to be
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31 ;; filled is examined and, based on information gathered, an
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32 ;; appropriate value for fill-prefix is constructed. Also the
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33 ;; boundaries of the current paragraph are located. This occurs
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34 ;; only if the fill prefix is not already non-nil.
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35 ;;
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36 ;; The net result of this is that blurbs of text that are offset
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37 ;; from left margin by asterisks, dashes, and/or spaces, numbered
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38 ;; examples, included text from USENET news articles, etc. are
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39 ;; generally filled correctly with no fuss.
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40 ;;
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41 ;; Since this package replaces existing Emacs functions, it cannot
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42 ;; be autoloaded. Save this in a file named filladapt.el in a
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43 ;; Lisp directory that Emacs knows about, byte-compile it and put
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44 ;; (require 'filladapt)
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45 ;; in your .emacs file.
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46 ;;
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47 ;; Note that in this release Filladapt mode is a minor mode and it is
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48 ;; _off_ by default. If you want it to be on by default, use
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49 ;; (setq-default filladapt-mode t)
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50 ;;
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51 ;; M-x filladapt-mode toggles Filladapt mode on/off in the current
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52 ;; buffer.
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53 ;;
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54 ;; Use
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55 ;; (add-hook 'text-mode-hook 'turn-on-filladapt-mode)
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56 ;; to have Filladapt always enabled in Text mode.
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57 ;;
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58 ;; Use
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59 ;; (add-hook 'c-mode-hook 'turn-off-filladapt-mode)
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60 ;; to have Filladapt always disabled in C mode.
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61 ;;
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62 ;; In many cases, you can extend Filladapt by adding appropriate
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63 ;; entries to the following three `defvar's. See `postscript-comment'
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64 ;; or `texinfo-comment' as a sample of what needs to be done.
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65 ;;
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66 ;; filladapt-token-table
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67 ;; filladapt-token-match-table
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68 ;; filladapt-token-conversion-table
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69
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108
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70 (and (featurep 'filladapt)
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71 (error "filladapt cannot be loaded twice in the same Emacs session."))
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72
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73 (provide 'filladapt)
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74
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120
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75 ;; BLOB to make custom stuff work even without customize
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76 (eval-and-compile
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77 (condition-case ()
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78 (require 'custom)
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79 (error nil))
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80 (if (and (featurep 'custom) (fboundp 'custom-declare-variable))
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81 nil ;; We've got what we needed
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82 ;; We have the old custom-library, hack around it!
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83 (defmacro defgroup (&rest args)
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84 nil)
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85 (defmacro defcustom (var value doc &rest args)
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86 (` (defvar (, var) (, value) (, doc))))))
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87
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88 (defgroup filladapt nil
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89 "Enhanced filling"
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90 :group 'editing)
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91
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92 (defvar filladapt-version "2.10"
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93 "Version string for filladapt.")
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94
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120
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95 (defcustom filladapt-mode nil
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96 "*Non-nil means that Filladapt minor mode is enabled.
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120
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97 Use the filladapt-mode command to toggle the mode on/off."
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98 :type 'boolean
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99 :group 'filladapt)
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100 (make-variable-buffer-local 'filladapt-mode)
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101
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120
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102 (defcustom filladapt-mode-line-string " Filladapt"
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103 "*String to display in the modeline when Filladapt mode is active.
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104 Set this to nil if you don't want a modeline indicator for Filladapt."
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105 :type 'string
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106 :group 'filladapt)
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107
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120
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108 (defcustom filladapt-fill-column-tolerance nil
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108
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109 "*Tolerate filled paragraph lines ending this far from the fill column.
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110 If any lines other than the last paragraph line end at a column
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111 less than fill-column - filladapt-fill-column-tolerance, fill-column will
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112 be adjusted using the filladapt-fill-column-*-fuzz variables and
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113 the paragraph will be re-filled until the tolerance is achieved
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114 or filladapt runs out of fuzz values to try.
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115
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116 A nil value means behave normally, that is, don't try refilling
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117 paragraphs to make filled line lengths fit within any particular
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120
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118 range."
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119 :type '(choice (const nil)
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120 integer)
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121 :group 'filladapt)
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108
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122
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120
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123 (defcustom filladapt-fill-column-forward-fuzz 5
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108
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124 "*Try values from fill-column to fill-column plus this variable
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125 when trying to make filled paragraph lines fall with the tolerance
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120
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126 range specified by filladapt-fill-column-tolerance."
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127 :type 'integer
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128 :group 'filladapt)
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108
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129
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120
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130 (defcustom filladapt-fill-column-backward-fuzz 5
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108
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131 "*Try values from fill-column to fill-column minus this variable
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132 when trying to make filled paragraph lines fall with the tolerance
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133 range specified by filladapt-fill-column-tolerance."
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134 :type 'integer
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135 :group 'filladapt)
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108
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136
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137 ;; install on minor-mode-alist
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138 (or (assq 'filladapt-mode minor-mode-alist)
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139 (setq minor-mode-alist (cons (list 'filladapt-mode
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140 'filladapt-mode-line-string)
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141 minor-mode-alist)))
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142
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120
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143 (defcustom filladapt-token-table
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144 '(
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108
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145 ;; this must be first
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146 ("^" beginning-of-line)
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147 ;; Included text in news or mail replies
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108
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148 (">+" citation->)
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149 ;; Included text generated by SUPERCITE. We can't hope to match all
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150 ;; the possible variations, your mileage may vary.
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151 ("[A-Za-z0-9][^'`\"< \t\n]*>[ \t]*" supercite-citation)
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152 ;; Lisp comments
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108
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153 (";+" lisp-comment)
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154 ;; UNIX shell comments
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108
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155 ("#+" sh-comment)
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156 ;; Postscript comments
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108
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157 ("%+" postscript-comment)
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158 ;; C++ comments
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108
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159 ("///*" c++-comment)
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160 ;; Texinfo comments
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108
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161 ("@c[ \t]" texinfo-comment)
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162 ("@comment[ \t]" texinfo-comment)
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163 ;; Bullet types.
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164 ;;
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108
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165 ;; LaTex \item
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166 ;;
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167 ("\\\\item[ \t]" bullet)
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168 ;;
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169 ;; 1. xxxxx
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170 ;; xxxxx
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171 ;;
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172 ("[0-9]+\\.[ \t]" bullet)
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173 ;;
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174 ;; 2.1.3 xxxxx xx x xx x
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175 ;; xxx
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176 ;;
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177 ("[0-9]+\\(\\.[0-9]+\\)+[ \t]" bullet)
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178 ;;
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179 ;; a. xxxxxx xx
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180 ;; xxx xxx
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181 ;;
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182 ("[A-Za-z]\\.[ \t]" bullet)
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183 ;;
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184 ;; 1) xxxx x xx x xx or (1) xx xx x x xx xx
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185 ;; xx xx xxxx xxx xx x x xx x
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186 ;;
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108
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187 ("(?[0-9]+)[ \t]" bullet)
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188 ;;
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189 ;; a) xxxx x xx x xx or (a) xx xx x x xx xx
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190 ;; xx xx xxxx xxx xx x x xx x
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191 ;;
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108
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192 ("(?[A-Za-z])[ \t]" bullet)
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193 ;;
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194 ;; 2a. xx x xxx x x xxx
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195 ;; xxx xx x xx x
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196 ;;
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108
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197 ("[0-9]+[A-Za-z]\\.[ \t]" bullet)
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198 ;;
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199 ;; 1a) xxxx x xx x xx or (1a) xx xx x x xx xx
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200 ;; xx xx xxxx xxx xx x x xx x
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201 ;;
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108
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202 ("(?[0-9]+[A-Za-z])[ \t]" bullet)
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203 ;;
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204 ;; - xx xxx xxxx or * xx xx x xxx xxx
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205 ;; xxx xx xx x xxx x xx x x x
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206 ;;
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108
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207 ("[-~*+]+[ \t]" bullet)
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208 ;;
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209 ;; o xx xxx xxxx xx x xx xxx x xxx xx x xxx
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210 ;; xxx xx xx
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211 ;;
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108
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212 ("o[ \t]" bullet)
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213 ;; don't touch
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108
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214 ("[ \t]+" space)
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215 ("$" end-of-line)
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216 )
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217 "Table of tokens filladapt knows about.
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218 Format is
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219
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220 ((REGEXP SYM) ...)
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221
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222 filladapt uses this table to build a tokenized representation of
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223 the beginning of the current line. Each REGEXP is matched
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224 against the beginning of the line until a match is found.
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225 Matching is done case-sensitively. The corresponding SYM is
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226 added to the list, point is moved to (match-end 0) and the
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227 process is repeated. The process ends when there is no REGEXP in
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228 the table that matches what is at point."
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229 :type '(repeat (list regexp symbol))
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230 :group 'filladapt)
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231
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120
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232 (defcustom filladapt-not-token-table
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233 '(
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234 "[Ee].g."
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235 "[Ii].e."
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236 ;; end-of-line isn't a token if whole line is empty
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237 "^$"
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238 )
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239 "List of regexps that can never be a token.
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240 Before trying the regular expressions in filladapt-token-table,
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241 the regexps in this list are tried. If any regexp in this list
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242 matches what is at point then the token generator gives up and
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243 doesn't try any of the regexps in filladapt-token-table.
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244
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245 Regexp matching is done case-sensitively."
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246 :type '(repeat regexp)
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247 :group 'filladapt)
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248
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120
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249 (defcustom filladapt-token-match-table
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250 '(
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251 (citation-> citation->)
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252 (supercite-citation supercite-citation)
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253 (lisp-comment lisp-comment)
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254 (sh-comment sh-comment)
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255 (postscript-comment postscript-comment)
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256 (c++-comment c++-comment)
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257 (texinfo-comment texinfo-comment)
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258 (bullet)
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259 (space bullet space)
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108
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260 (beginning-of-line beginning-of-line)
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261 )
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262 "Table describing what tokens a certain token will match.
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263
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264 To decide whether a line belongs in the current paragraph,
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265 filladapt creates a token list for the fill prefix of both lines.
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266 Tokens and the columns where tokens end are compared. This table
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267 specifies what a certain token will match.
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268
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269 Table format is
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270
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271 (SYM [SYM1 [SYM2 ...]])
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272
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273 The first symbol SYM is the token, subsequent symbols are the
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274 tokens that SYM will match."
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275 :type '(repeat (repeat symbol))
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276 :group 'filladapt)
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277
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120
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278 (defcustom filladapt-token-match-many-table
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279 '(
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280 space
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281 )
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282 "List of tokens that can match multiple tokens.
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283 If one of these tokens appears in a token list, it will eat all
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284 matching tokens in a token list being matched against it until it
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285 encounters a token that doesn't match or a token that ends on
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286 a greater column number."
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287 :type '(repeat symbol)
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288 :group 'filladapt)
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289
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290 (defcustom filladapt-token-paragraph-start-table
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291 '(
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292 bullet
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293 )
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294 "List of tokens that indicate the start of a paragraph.
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295 If parsing a line generates a token list containing one of
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296 these tokens, then the line is considered to be the start of a
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297 paragraph."
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298 :type '(repeat symbol)
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299 :group 'filladapt)
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300
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120
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301 (defcustom filladapt-token-conversion-table
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302 '(
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303 (citation-> . exact)
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304 (supercite-citation . exact)
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305 (lisp-comment . exact)
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306 (sh-comment . exact)
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307 (postscript-comment . exact)
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308 (c++-comment . exact)
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309 (texinfo-comment . exact)
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310 (bullet . spaces)
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311 (space . exact)
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312 (end-of-line . exact)
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313 )
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314 "Table that specifies how to convert a token into a fill prefix.
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315 Table format is
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316
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317 ((SYM . HOWTO) ...)
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318
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319 SYM is the symbol naming the token to be converted.
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320 HOWTO specifies how to do the conversion.
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321 `exact' means copy the token's string directly into the fill prefix.
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322 `spaces' means convert all characters in the token string that are
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323 not a TAB or a space into spaces and copy the resulting string into
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324 the fill prefix."
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325 :type '(repeat (cons symbol (choice (const exact)
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326 (const spaces))))
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327 :group 'filladapt)
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328
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329 (defvar filladapt-function-table
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330 (let ((assoc-list
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331 (list (cons 'fill-paragraph (symbol-function 'fill-paragraph))
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108
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332 (cons 'fill-region (symbol-function 'fill-region))
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333 (cons 'fill-region-as-paragraph
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334 (symbol-function 'fill-region-as-paragraph))
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335 (cons 'do-auto-fill (symbol-function 'do-auto-fill)))))
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336 ;; v18 Emacs doesn't have lisp-fill-paragraph
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337 (if (fboundp 'lisp-fill-paragraph)
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338 (nconc assoc-list
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339 (list (cons 'lisp-fill-paragraph
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340 (symbol-function 'lisp-fill-paragraph)))))
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341 assoc-list )
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342 "Table containing the old function definitions that filladapt usurps.")
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343
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120
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344 (defcustom filladapt-fill-paragraph-post-hook nil
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345 "Hooks run after filladapt runs fill-paragraph."
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346 :type 'hook
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347 :group 'filladapt)
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348
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349 (defvar filladapt-inside-filladapt nil
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350 "Non-nil if the filladapt version of a fill function executing.
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351 Currently this is only checked by the filladapt version of
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352 fill-region-as-paragraph to avoid this infinite recursion:
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353
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354 fill-region-as-paragraph -> fill-paragraph -> fill-region-as-paragraph ...")
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355
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120
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356 (defcustom filladapt-debug nil
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357 "Non-nil means filladapt debugging is enabled.
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358 Use the filladapt-debug command to turn on debugging.
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359
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360 With debugging enabled, filladapt will
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361
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362 a. display the proposed indentation with the tokens highlighted
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363 using filladapt-debug-indentation-face-1 and
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364 filladapt-debug-indentation-face-2.
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365 b. display the current paragraph using the face specified by
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366 filladapt-debug-paragraph-face."
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367 :type 'boolean
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368 :group 'filladapt)
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369
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370 (if filladapt-debug
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371 (add-hook 'post-command-hook 'filladapt-display-debug-info-maybe))
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372
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373 (defvar filladapt-debug-indentation-face-1 'highlight
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374 "Face used to display the indentation when debugging is enabled.")
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375
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376 (defvar filladapt-debug-indentation-face-2 'secondary-selection
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377 "Another face used to display the indentation when debugging is enabled.")
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378
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379 (defvar filladapt-debug-paragraph-face 'bold
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380 "Face used to display the current paragraph when debugging is enabled.")
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381
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382 (defvar filladapt-debug-indentation-extents nil)
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383 (make-variable-buffer-local 'filladapt-debug-indentation-extents)
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384 (defvar filladapt-debug-paragraph-extent nil)
|
|
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385 (make-variable-buffer-local 'filladapt-debug-paragraph-extent)
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386
|
|
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387 ;; kludge city, see references in code.
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|
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388 (defvar filladapt-old-line-prefix)
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|
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389
|
|
|
390 (defun do-auto-fill ()
|
|
|
391 (catch 'done
|
|
|
392 (if (and filladapt-mode (null fill-prefix))
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393 (save-restriction
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|
394 (let ((paragraph-ignore-fill-prefix nil)
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|
|
395 ;; if the user wanted this stuff, they probably
|
|
|
396 ;; wouldn't be using filladapt-mode.
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397 (adaptive-fill-mode nil)
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|
|
398 (adaptive-fill-regexp nil)
|
|
|
399 ;; need this or Emacs 19 ignores fill-prefix when
|
|
|
400 ;; inside a comment.
|
|
|
401 (comment-multi-line t)
|
|
|
402 (filladapt-inside-filladapt t)
|
|
|
403 fill-prefix retval)
|
|
|
404 (if (filladapt-adapt nil nil)
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|
405 (progn
|
|
|
406 (setq retval (filladapt-funcall 'do-auto-fill))
|
|
|
407 (throw 'done retval))))))
|
|
|
408 (filladapt-funcall 'do-auto-fill)))
|
|
|
409
|
|
|
410 (defun filladapt-fill-paragraph (function arg)
|
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411 (catch 'done
|
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|
412 (if (and filladapt-mode (null fill-prefix))
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413 (save-restriction
|
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|
414 (let ((paragraph-ignore-fill-prefix nil)
|
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|
415 ;; if the user wanted this stuff, they probably
|
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|
416 ;; wouldn't be using filladapt-mode.
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417 (adaptive-fill-mode nil)
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|
418 (adaptive-fill-regexp nil)
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|
419 ;; need this or Emacs 19 ignores fill-prefix when
|
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|
420 ;; inside a comment.
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|
421 (comment-multi-line t)
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|
|
422 fill-prefix retval)
|
|
|
423 (if (filladapt-adapt t nil)
|
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|
424 (progn
|
|
108
|
425 (if filladapt-fill-column-tolerance
|
|
|
426 (let* ((low (- fill-column
|
|
|
427 filladapt-fill-column-backward-fuzz))
|
|
|
428 (high (+ fill-column
|
|
|
429 filladapt-fill-column-forward-fuzz))
|
|
|
430 (old-fill-column fill-column)
|
|
|
431 (fill-column fill-column)
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|
|
432 (lim (- high low))
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|
433 (done nil)
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|
434 (sign 1)
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|
435 (delta 0))
|
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|
436 (while (not done)
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|
437 (setq retval (filladapt-funcall function arg))
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|
438 (if (filladapt-paragraph-within-fill-tolerance)
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|
|
439 (setq done 'success)
|
|
|
440 (setq delta (1+ delta)
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|
441 sign (* sign -1)
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|
442 fill-column (+ fill-column (* delta sign)))
|
|
|
443 (while (and (<= delta lim)
|
|
|
444 (or (< fill-column low)
|
|
|
445 (> fill-column high)))
|
|
|
446 (setq delta (1+ delta)
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|
|
447 sign (* sign -1)
|
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|
448 fill-column (+ fill-column
|
|
|
449 (* delta sign))))
|
|
|
450 (setq done (> delta lim))))
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|
|
451 ;; if the paragraph lines never fell
|
|
|
452 ;; within the tolerances, refill using
|
|
|
453 ;; the old fill-column.
|
|
|
454 (if (not (eq done 'success))
|
|
|
455 (let ((fill-column old-fill-column))
|
|
|
456 (setq retval (filladapt-funcall function arg)))))
|
|
|
457 (setq retval (filladapt-funcall function arg)))
|
|
0
|
458 (run-hooks 'filladapt-fill-paragraph-post-hook)
|
|
|
459 (throw 'done retval))))))
|
|
|
460 ;; filladapt-adapt failed, so do fill-paragraph normally.
|
|
|
461 (filladapt-funcall function arg)))
|
|
|
462
|
|
|
463 (defun fill-paragraph (arg)
|
|
108
|
464 "Fill paragraph at or after point. Prefix arg means justify as well.
|
|
|
465
|
|
|
466 (This function has been overloaded with the `filladapt' version.)
|
|
|
467
|
|
|
468 If `sentence-end-double-space' is non-nil, then period followed by one
|
|
|
469 space does not end a sentence, so don't break a line there.
|
|
|
470
|
|
|
471 If `fill-paragraph-function' is non-nil, we call it (passing our
|
|
|
472 argument to it), and if it returns non-nil, we simply return its value."
|
|
0
|
473 (interactive "*P")
|
|
|
474 (let ((filladapt-inside-filladapt t))
|
|
|
475 (filladapt-fill-paragraph 'fill-paragraph arg)))
|
|
|
476
|
|
|
477 (defun lisp-fill-paragraph (&optional arg)
|
|
108
|
478 "Like \\[fill-paragraph], but handle Emacs Lisp comments.
|
|
|
479
|
|
|
480 (This function has been overloaded with the `filladapt' version.)
|
|
|
481
|
|
|
482 If any of the current line is a comment, fill the comment or the
|
|
|
483 paragraph of it that point is in, preserving the comment's indentation
|
|
|
484 and initial semicolons."
|
|
0
|
485 (interactive "*P")
|
|
|
486 (let ((filladapt-inside-filladapt t))
|
|
|
487 (filladapt-fill-paragraph 'lisp-fill-paragraph arg)))
|
|
|
488
|
|
108
|
489 (defun fill-region-as-paragraph (beg end &optional justify
|
|
|
490 nosqueeze squeeze-after)
|
|
|
491 "Fill the region as one paragraph.
|
|
|
492
|
|
|
493 (This function has been overloaded with the `filladapt' version.)
|
|
|
494
|
|
|
495 It removes any paragraph breaks in the region and extra newlines at the end,
|
|
|
496 indents and fills lines between the margins given by the
|
|
|
497 `current-left-margin' and `current-fill-column' functions.
|
|
|
498 It leaves point at the beginning of the line following the paragraph.
|
|
|
499
|
|
|
500 Normally performs justification according to the `current-justification'
|
|
|
501 function, but with a prefix arg, does full justification instead.
|
|
|
502
|
|
|
503 From a program, optional third arg JUSTIFY can specify any type of
|
|
|
504 justification. Fourth arg NOSQUEEZE non-nil means not to make spaces
|
|
|
505 between words canonical before filling. Fifth arg SQUEEZE-AFTER, if non-nil,
|
|
|
506 means don't canonicalize spaces before that position.
|
|
|
507
|
|
|
508 If `sentence-end-double-space' is non-nil, then period followed by one
|
|
|
509 space does not end a sentence, so don't break a line there."
|
|
0
|
510 (interactive "*r\nP")
|
|
|
511 (if (and filladapt-mode (not filladapt-inside-filladapt))
|
|
|
512 (save-restriction
|
|
|
513 (narrow-to-region beg end)
|
|
|
514 (let ((filladapt-inside-filladapt t)
|
|
|
515 line-start last-token)
|
|
|
516 (goto-char beg)
|
|
108
|
517 (while (equal (char-after (point)) ?\n)
|
|
|
518 (delete-char 1))
|
|
0
|
519 (end-of-line)
|
|
|
520 (while (zerop (forward-line))
|
|
|
521 (if (setq last-token
|
|
|
522 (car (filladapt-tail (filladapt-parse-prefixes))))
|
|
|
523 (progn
|
|
|
524 (setq line-start (point))
|
|
|
525 (move-to-column (nth 1 last-token))
|
|
|
526 (delete-region line-start (point))))
|
|
|
527 ;; Dance...
|
|
|
528 ;;
|
|
|
529 ;; Do this instead of (delete-char -1) to keep
|
|
|
530 ;; markers on the correct side of the whitespace.
|
|
|
531 (goto-char (1- (point)))
|
|
|
532 (insert " ")
|
|
|
533 (delete-char 1)
|
|
|
534
|
|
|
535 (end-of-line))
|
|
|
536 (goto-char beg)
|
|
|
537 (fill-paragraph justify))
|
|
|
538 ;; In XEmacs 19.12 and Emacs 18.59 fill-region relies on
|
|
|
539 ;; fill-region-as-paragraph to do this. If we don't do
|
|
|
540 ;; it, fill-region will spin in an endless loop.
|
|
|
541 (goto-char (point-max)))
|
|
|
542 (condition-case nil
|
|
|
543 ;; five args for Emacs 19.31
|
|
|
544 (filladapt-funcall 'fill-region-as-paragraph beg end
|
|
|
545 justify nosqueeze squeeze-after)
|
|
|
546 (wrong-number-of-arguments
|
|
|
547 (condition-case nil
|
|
|
548 ;; four args for Emacs 19.29
|
|
|
549 (filladapt-funcall 'fill-region-as-paragraph beg end
|
|
|
550 justify nosqueeze)
|
|
108
|
551 ;; three args for the rest of the world.
|
|
|
552 (wrong-number-of-arguments
|
|
|
553 (filladapt-funcall 'fill-region-as-paragraph beg end justify)))))))
|
|
|
554
|
|
|
555 (defun fill-region (beg end &optional justify nosqueeze to-eop)
|
|
|
556 "Fill each of the paragraphs in the region.
|
|
|
557
|
|
|
558 (This function has been overloaded with the `filladapt' version.)
|
|
|
559
|
|
|
560 Prefix arg (non-nil third arg, if called from program) means justify as well.
|
|
|
561
|
|
|
562 Noninteractively, fourth arg NOSQUEEZE non-nil means to leave
|
|
|
563 whitespace other than line breaks untouched, and fifth arg TO-EOP
|
|
|
564 non-nil means to keep filling to the end of the paragraph (or next
|
|
|
565 hard newline, if `use-hard-newlines' is on).
|
|
|
566
|
|
|
567 If `sentence-end-double-space' is non-nil, then period followed by one
|
|
|
568 space does not end a sentence, so don't break a line there."
|
|
|
569 (interactive "*r\nP")
|
|
|
570 (if (and filladapt-mode (not filladapt-inside-filladapt))
|
|
|
571 (save-restriction
|
|
|
572 (narrow-to-region beg end)
|
|
|
573 (let ((filladapt-inside-filladapt t)
|
|
|
574 start)
|
|
|
575 (goto-char beg)
|
|
|
576 (while (not (eobp))
|
|
|
577 (setq start (point))
|
|
|
578 (while (and (not (eobp)) (not (filladapt-parse-prefixes)))
|
|
|
579 (forward-line 1))
|
|
|
580 (if (not (equal start (point)))
|
|
|
581 (progn
|
|
|
582 (save-restriction
|
|
|
583 (narrow-to-region start (point))
|
|
|
584 (fill-region start (point) justify nosqueeze to-eop)
|
|
|
585 (goto-char (point-max)))
|
|
|
586 (if (and (not (bolp)) (not (eobp)))
|
|
|
587 (forward-line 1))))
|
|
|
588 (if (filladapt-parse-prefixes)
|
|
|
589 (progn
|
|
|
590 (save-restriction
|
|
|
591 ;; for the clipping region
|
|
|
592 (filladapt-adapt t t)
|
|
|
593 (fill-paragraph justify)
|
|
|
594 (goto-char (point-max)))
|
|
|
595 (if (and (not (bolp)) (not (eobp)))
|
|
|
596 (forward-line 1)))))))
|
|
|
597 (condition-case nil
|
|
|
598 (filladapt-funcall 'fill-region beg end justify nosqueeze to-eop)
|
|
0
|
599 (wrong-number-of-arguments
|
|
108
|
600 (condition-case nil
|
|
|
601 (filladapt-funcall 'fill-region beg end justify nosqueeze)
|
|
|
602 (wrong-number-of-arguments
|
|
|
603 (filladapt-funcall 'fill-region beg end justify)))))))
|
|
0
|
604
|
|
|
605 (defvar zmacs-region-stays) ; for XEmacs
|
|
|
606
|
|
|
607 (defun filladapt-mode (&optional arg)
|
|
|
608 "Toggle Filladapt minor mode.
|
|
|
609 With arg, turn Filladapt mode on iff arg is positive. When
|
|
|
610 Filladapt mode is enabled, auto-fill-mode and the fill-paragraph
|
|
|
611 command are both smarter about guessing a proper fill-prefix and
|
|
|
612 finding paragraph boundaries when bulleted and indented lines and
|
|
|
613 paragraphs are used."
|
|
|
614 (interactive "P")
|
|
|
615 ;; don't deactivate the region.
|
|
|
616 (setq zmacs-region-stays t)
|
|
|
617 (setq filladapt-mode (or (and arg (> (prefix-numeric-value arg) 0))
|
|
|
618 (and (null arg) (null filladapt-mode))))
|
|
|
619 (if (fboundp 'force-mode-line-update)
|
|
|
620 (force-mode-line-update)
|
|
|
621 (set-buffer-modified-p (buffer-modified-p))))
|
|
|
622
|
|
|
623 (defun turn-on-filladapt-mode ()
|
|
|
624 "Unconditionally turn on Filladapt mode in the current buffer."
|
|
|
625 (filladapt-mode 1))
|
|
|
626
|
|
|
627 (defun turn-off-filladapt-mode ()
|
|
|
628 "Unconditionally turn off Filladapt mode in the current buffer."
|
|
|
629 (filladapt-mode -1))
|
|
|
630
|
|
|
631 (defun filladapt-funcall (function &rest args)
|
|
|
632 "Call the old definition of a function that filladapt has usurped."
|
|
|
633 (apply (cdr (assoc function filladapt-function-table)) args))
|
|
|
634
|
|
|
635 (defun filladapt-paragraph-start (list)
|
|
|
636 "Returns non-nil if LIST contains a paragraph starting token.
|
|
|
637 LIST should be a token list as returned by filladapt-parse-prefixes."
|
|
|
638 (catch 'done
|
|
|
639 (while list
|
|
|
640 (if (memq (car (car list)) filladapt-token-paragraph-start-table)
|
|
|
641 (throw 'done t))
|
|
|
642 (setq list (cdr list)))))
|
|
|
643
|
|
|
644 (defun filladapt-parse-prefixes ()
|
|
|
645 "Parse all the tokens after point and return a list of them.
|
|
|
646 The tokens regular expressions are specified in
|
|
|
647 filladapt-token-table. The list returned is of this form
|
|
|
648
|
|
|
649 ((SYM COL STRING) ...)
|
|
|
650
|
|
|
651 SYM is a token symbol as found in filladapt-token-table.
|
|
|
652 COL is the column at which the token ended.
|
|
|
653 STRING is the token's text."
|
|
|
654 (save-excursion
|
|
|
655 (let ((token-list nil)
|
|
|
656 (done nil)
|
|
|
657 (old-point (point))
|
|
|
658 (case-fold-search nil)
|
|
108
|
659 token-table not-token-table moved)
|
|
0
|
660 (catch 'done
|
|
|
661 (while (not done)
|
|
|
662 (setq not-token-table filladapt-not-token-table)
|
|
|
663 (while not-token-table
|
|
|
664 (if (looking-at (car not-token-table))
|
|
|
665 (throw 'done t))
|
|
|
666 (setq not-token-table (cdr not-token-table)))
|
|
|
667 (setq token-table filladapt-token-table
|
|
|
668 done t)
|
|
|
669 (while token-table
|
|
|
670 (if (null (looking-at (car (car token-table))))
|
|
|
671 (setq token-table (cdr token-table))
|
|
|
672 (goto-char (match-end 0))
|
|
108
|
673 (setq token-list (cons (list (nth 1 (car token-table))
|
|
0
|
674 (current-column)
|
|
|
675 (buffer-substring
|
|
|
676 (match-beginning 0)
|
|
|
677 (match-end 0)))
|
|
|
678 token-list)
|
|
108
|
679 moved (not (eq (point) old-point))
|
|
|
680 token-table (if moved nil (cdr token-table))
|
|
|
681 done (not moved)
|
|
0
|
682 old-point (point))))))
|
|
|
683 (nreverse token-list))))
|
|
|
684
|
|
|
685 (defun filladapt-tokens-match-p (list1 list2)
|
|
|
686 "Compare two token lists and return non-nil if they match, nil otherwise.
|
|
|
687 The lists are walked through in lockstep, comparing tokens.
|
|
|
688
|
|
|
689 When two tokens A and B are compared, they are considered to
|
|
|
690 match if
|
|
|
691
|
|
|
692 1. A appears in B's list of matching tokens or
|
|
|
693 B appears in A's list of matching tokens
|
|
|
694 and
|
|
|
695 2. A and B both end at the same column
|
|
|
696 or
|
|
|
697 A can match multiple tokens and ends at a column > than B
|
|
|
698 or
|
|
|
699 B can match multiple tokens and ends at a column > than A
|
|
|
700
|
|
|
701 In the case where the end columns differ the list pointer for the
|
|
|
702 token with the greater end column is not moved forward, which
|
|
|
703 allows its current token to be matched against the next token in
|
|
|
704 the other list in the next iteration of the matching loop.
|
|
|
705
|
|
|
706 All tokens must be matched in order for the lists to be considered
|
|
|
707 matching."
|
|
|
708 (let ((matched t)
|
|
|
709 (done nil))
|
|
|
710 (while (and (not done) list1 list2)
|
|
|
711 (let* ((token1 (car (car list1)))
|
|
|
712 (token1-matches-many-p
|
|
|
713 (memq token1 filladapt-token-match-many-table))
|
|
|
714 (token1-matches (cdr (assq token1 filladapt-token-match-table)))
|
|
|
715 (token1-endcol (nth 1 (car list1)))
|
|
|
716 (token2 (car (car list2)))
|
|
|
717 (token2-matches-many-p
|
|
|
718 (memq token2 filladapt-token-match-many-table))
|
|
|
719 (token2-matches (cdr (assq token2 filladapt-token-match-table)))
|
|
|
720 (token2-endcol (nth 1 (car list2)))
|
|
|
721 (tokens-match (or (memq token1 token2-matches)
|
|
|
722 (memq token2 token1-matches))))
|
|
|
723 (cond ((not tokens-match)
|
|
|
724 (setq matched nil
|
|
|
725 done t))
|
|
|
726 ((and token1-matches-many-p token2-matches-many-p)
|
|
|
727 (cond ((= token1-endcol token2-endcol)
|
|
|
728 (setq list1 (cdr list1)
|
|
|
729 list2 (cdr list2)))
|
|
|
730 ((< token1-endcol token2-endcol)
|
|
|
731 (setq list1 (cdr list1)))
|
|
|
732 (t
|
|
|
733 (setq list2 (cdr list2)))))
|
|
|
734 (token1-matches-many-p
|
|
|
735 (cond ((= token1-endcol token2-endcol)
|
|
|
736 (setq list1 (cdr list1)
|
|
|
737 list2 (cdr list2)))
|
|
|
738 ((< token1-endcol token2-endcol)
|
|
|
739 (setq matched nil
|
|
|
740 done t))
|
|
|
741 (t
|
|
|
742 (setq list2 (cdr list2)))))
|
|
|
743 (token2-matches-many-p
|
|
|
744 (cond ((= token1-endcol token2-endcol)
|
|
|
745 (setq list1 (cdr list1)
|
|
|
746 list2 (cdr list2)))
|
|
|
747 ((< token2-endcol token1-endcol)
|
|
|
748 (setq matched nil
|
|
|
749 done t))
|
|
|
750 (t
|
|
|
751 (setq list1 (cdr list1)))))
|
|
|
752 ((= token1-endcol token2-endcol)
|
|
|
753 (setq list1 (cdr list1)
|
|
|
754 list2 (cdr list2)))
|
|
|
755 (t
|
|
|
756 (setq matched nil
|
|
|
757 done t)))))
|
|
|
758 (and matched (null list1) (null list2)) ))
|
|
|
759
|
|
|
760 (defun filladapt-make-fill-prefix (list)
|
|
|
761 "Build a fill-prefix for a token LIST.
|
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762 filladapt-token-conversion-table specifies how this is done."
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763 (let ((prefix-list nil)
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764 (conversion-spec nil))
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765 (while list
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766 (setq conversion-spec (cdr (assq (car (car list))
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767 filladapt-token-conversion-table)))
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768 (cond ((eq conversion-spec 'spaces)
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769 (setq prefix-list
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770 (cons
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771 (filladapt-convert-to-spaces (nth 2 (car list)))
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772 prefix-list)))
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773 ((eq conversion-spec 'exact)
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774 (setq prefix-list
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775 (cons
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776 (nth 2 (car list))
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777 prefix-list))))
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778 (setq list (cdr list)))
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779 (apply (function concat) (nreverse prefix-list)) ))
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780
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108
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781 (defun filladapt-paragraph-within-fill-tolerance ()
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782 (catch 'done
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783 (save-excursion
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784 (let ((low (- fill-column filladapt-fill-column-tolerance))
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785 (shortline nil))
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786 (goto-char (point-min))
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787 (while (not (eobp))
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788 (if shortline
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789 (throw 'done nil)
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790 (end-of-line)
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791 (setq shortline (< (current-column) low))
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792 (forward-line 1)))
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793 t ))))
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794
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0
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795 (defun filladapt-convert-to-spaces (string)
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796 "Return a copy of STRING, with all non-tabs and non-space changed to spaces."
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797 (let ((i 0)
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798 (space-list '(?\ ?\t))
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799 (space ?\ )
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800 (lim (length string)))
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801 (setq string (copy-sequence string))
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802 (while (< i lim)
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803 (if (not (memq (aref string i) space-list))
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804 (aset string i space))
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805 (setq i (1+ i)))
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806 string ))
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807
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808 (defun filladapt-adapt (paragraph debugging)
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809 "Set fill-prefix based on the contents of the current line.
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810
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811 If the first arg PARAGRAPH is non-nil, also set a clipping region
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812 around the current paragraph.
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813
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814 If the second arg DEBUGGING is non-nil, don't do the kludge that's
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815 necessary to make certain paragraph fills work properly."
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816 (save-excursion
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817 (beginning-of-line)
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818 (let ((token-list (filladapt-parse-prefixes))
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819 curr-list done)
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820 (if (null token-list)
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821 nil
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822 (setq fill-prefix (filladapt-make-fill-prefix token-list))
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823 (if paragraph
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824 (let (beg end)
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825 (if (filladapt-paragraph-start token-list)
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826 (setq beg (point))
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827 (save-excursion
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828 (setq done nil)
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829 (while (not done)
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830 (cond ((not (= 0 (forward-line -1)))
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831 (setq done t
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832 beg (point)))
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833 ((not (filladapt-tokens-match-p
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834 token-list
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835 (setq curr-list (filladapt-parse-prefixes))))
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836 (forward-line 1)
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837 (setq done t
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838 beg (point)))
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839 ((filladapt-paragraph-start curr-list)
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840 (setq done t
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841 beg (point)))))))
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842 (save-excursion
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843 (setq done nil)
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844 (while (not done)
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845 (cond ((not (= 0 (progn (end-of-line) (forward-line 1))))
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846 (setq done t
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847 end (point)))
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848 ((not (filladapt-tokens-match-p
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849 token-list
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850 (setq curr-list (filladapt-parse-prefixes))))
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851 (setq done t
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852 end (point)))
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853 ((filladapt-paragraph-start curr-list)
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854 (setq done t
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855 end (point))))))
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856 (narrow-to-region beg end)
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857 ;; Multiple spaces after the bullet at the start of
|
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858 ;; a hanging list paragraph get squashed by
|
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859 ;; fill-paragraph. We kludge around this by
|
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860 ;; replacing the line prefix with the fill-prefix
|
|
|
861 ;; used by the rest of the lines in the paragraph.
|
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|
862 ;; fill-paragraph will not alter the fill prefix so
|
|
|
863 ;; we win. The post hook restores the old line prefix
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|
864 ;; after fill-paragraph has been called.
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865 (if (and paragraph (not debugging))
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866 (let (col)
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867 (setq col (nth 1 (car (filladapt-tail token-list))))
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|
868 (goto-char (point-min))
|
|
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869 (move-to-column col)
|
|
|
870 (setq filladapt-old-line-prefix
|
|
|
871 (buffer-substring (point-min) (point)))
|
|
|
872 (delete-region (point-min) (point))
|
|
|
873 (insert fill-prefix)
|
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|
874 (add-hook 'filladapt-fill-paragraph-post-hook
|
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|
875 'filladapt-cleanup-kludge-at-point-min)))))
|
|
|
876 t ))))
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|
877
|
|
|
878 (defun filladapt-cleanup-kludge-at-point-min ()
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|
879 "Cleanup the paragraph fill kludge.
|
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|
880 See filladapt-adapt."
|
|
|
881 (save-excursion
|
|
|
882 (goto-char (point-min))
|
|
|
883 (insert filladapt-old-line-prefix)
|
|
|
884 (delete-char (length fill-prefix))
|
|
|
885 (remove-hook 'filladapt-fill-paragraph-post-hook
|
|
|
886 'filladapt-cleanup-kludge-at-point-min)))
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|
|
887
|
|
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888 (defun filladapt-tail (list)
|
|
|
889 "Returns the last cons in LIST."
|
|
|
890 (if (null list)
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|
891 nil
|
|
|
892 (while (consp (cdr list))
|
|
|
893 (setq list (cdr list)))
|
|
|
894 list ))
|
|
|
895
|
|
|
896 (defun filladapt-delete-extent (e)
|
|
|
897 (if (fboundp 'delete-extent)
|
|
|
898 (delete-extent e)
|
|
|
899 (delete-overlay e)))
|
|
|
900
|
|
|
901 (defun filladapt-make-extent (beg end)
|
|
|
902 (if (fboundp 'make-extent)
|
|
|
903 (make-extent beg end)
|
|
|
904 (make-overlay beg end)))
|
|
|
905
|
|
|
906 (defun filladapt-set-extent-endpoints (e beg end)
|
|
|
907 (if (fboundp 'set-extent-endpoints)
|
|
|
908 (set-extent-endpoints e beg end)
|
|
|
909 (move-overlay e beg end)))
|
|
|
910
|
|
|
911 (defun filladapt-set-extent-property (e prop val)
|
|
|
912 (if (fboundp 'set-extent-property)
|
|
|
913 (set-extent-property e prop val)
|
|
|
914 (overlay-put e prop val)))
|
|
|
915
|
|
|
916 (defun filladapt-debug ()
|
|
|
917 "Toggle filladapt debugging on/off in the current buffer."
|
|
|
918 ;; (interactive)
|
|
|
919 (make-local-variable 'filladapt-debug)
|
|
|
920 (setq filladapt-debug (not filladapt-debug))
|
|
|
921 (if (null filladapt-debug)
|
|
|
922 (progn
|
|
|
923 (mapcar (function (lambda (e) (filladapt-set-extent-endpoints e 1 1)))
|
|
|
924 filladapt-debug-indentation-extents)
|
|
|
925 (if filladapt-debug-paragraph-extent
|
|
|
926 (progn
|
|
|
927 (filladapt-delete-extent filladapt-debug-paragraph-extent)
|
|
|
928 (setq filladapt-debug-paragraph-extent nil)))))
|
|
|
929 (add-hook 'post-command-hook 'filladapt-display-debug-info-maybe))
|
|
|
930
|
|
|
931 (defun filladapt-display-debug-info-maybe ()
|
|
|
932 (cond ((null filladapt-debug) nil)
|
|
|
933 (fill-prefix nil)
|
|
|
934 (t
|
|
|
935 (if (null filladapt-debug-paragraph-extent)
|
|
|
936 (let ((e (filladapt-make-extent 1 1)))
|
|
|
937 (filladapt-set-extent-property e 'detachable nil)
|
|
|
938 (filladapt-set-extent-property e 'evaporate nil)
|
|
|
939 (filladapt-set-extent-property e 'face
|
|
|
940 filladapt-debug-paragraph-face)
|
|
|
941 (setq filladapt-debug-paragraph-extent e)))
|
|
|
942 (save-excursion
|
|
|
943 (save-restriction
|
|
|
944 (let ((ei-list filladapt-debug-indentation-extents)
|
|
|
945 (ep filladapt-debug-paragraph-extent)
|
|
|
946 (face filladapt-debug-indentation-face-1)
|
|
|
947 fill-prefix token-list)
|
|
|
948 (if (null (filladapt-adapt t t))
|
|
|
949 (progn
|
|
|
950 (filladapt-set-extent-endpoints ep 1 1)
|
|
|
951 (while ei-list
|
|
|
952 (filladapt-set-extent-endpoints (car ei-list) 1 1)
|
|
|
953 (setq ei-list (cdr ei-list))))
|
|
|
954 (filladapt-set-extent-endpoints ep (point-min) (point-max))
|
|
|
955 (beginning-of-line)
|
|
|
956 (setq token-list (filladapt-parse-prefixes))
|
|
|
957 (message "(%s)" (mapconcat (function
|
|
|
958 (lambda (q) (symbol-name (car q))))
|
|
|
959 token-list
|
|
|
960 " "))
|
|
|
961 (while token-list
|
|
|
962 (if ei-list
|
|
|
963 (setq e (car ei-list)
|
|
|
964 ei-list (cdr ei-list))
|
|
|
965 (setq e (filladapt-make-extent 1 1))
|
|
|
966 (filladapt-set-extent-property e 'detachable nil)
|
|
|
967 (filladapt-set-extent-property e 'evaporate nil)
|
|
|
968 (setq filladapt-debug-indentation-extents
|
|
|
969 (cons e filladapt-debug-indentation-extents)))
|
|
|
970 (filladapt-set-extent-property e 'face face)
|
|
|
971 (filladapt-set-extent-endpoints e (point)
|
|
|
972 (progn
|
|
|
973 (move-to-column
|
|
|
974 (nth 1
|
|
|
975 (car token-list)))
|
|
|
976 (point)))
|
|
|
977 (if (eq face filladapt-debug-indentation-face-1)
|
|
|
978 (setq face filladapt-debug-indentation-face-2)
|
|
|
979 (setq face filladapt-debug-indentation-face-1))
|
|
|
980 (setq token-list (cdr token-list)))
|
|
|
981 (while ei-list
|
|
|
982 (filladapt-set-extent-endpoints (car ei-list) 1 1)
|
|
|
983 (setq ei-list (cdr ei-list))))))))))
|
