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209
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1 ;;; fill.el --- fill commands for XEmacs.
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2
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3 ;; Copyright (C) 1985, 86, 92, 94, 95, 1997 Free Software Foundation, Inc.
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4
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5 ;; Maintainer: XEmacs Development Team
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6 ;; Keywords: wp, dumped
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7
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8 ;; This file is part of XEmacs.
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9
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10 ;; XEmacs is free software; you can redistribute it and/or modify it
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11 ;; under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your option)
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13 ;; any later version.
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14
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15 ;; XEmacs is distributed in the hope that it will be useful, but
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16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 ;; General Public License for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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22 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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23 ;; 02111-1307, USA.
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24
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25 ;;; Synched up with: FSF 19.34.
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26
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27 ;;; Commentary:
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28
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29 ;; This file is dumped with XEmacs.
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30
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31 ;; All the commands for filling text. These are documented in the XEmacs
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32 ;; Reference Manual.
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33
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34 ;; 97/3/14 Jareth Hein (jhod@po.iijnet.or.jp) added functions for kinsoku (asian text
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35 ;; line break processing)
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36 ;; 97/06/11 Steve Baur (steve@altair.xemacs.org) converted broken
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37 ;; following-char/preceding-char calls to char-after/char-before.
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38
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39 ;;; Code:
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40
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227
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41 (defgroup fill nil
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42 "Indenting and filling text."
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43 :group 'editing)
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44
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45 (defcustom fill-individual-varying-indent nil
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209
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46 "*Controls criterion for a new paragraph in `fill-individual-paragraphs'.
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47 Non-nil means changing indent doesn't end a paragraph.
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48 That mode can handle paragraphs with extra indentation on the first line,
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49 but it requires separator lines between paragraphs.
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227
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50 A value of nil means that any change in indentation starts a new paragraph."
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51 :type 'boolean
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52 :group 'fill)
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209
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53
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227
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54 (defcustom sentence-end-double-space t
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209
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55 "*Non-nil means a single space does not end a sentence.
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56 This variable applies only to filling, not motion commands. To
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227
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57 change the behavior of motion commands, see `sentence-end'."
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58 :type 'boolean
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59 :group 'fill)
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209
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60
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227
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61 (defcustom colon-double-space nil
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62 "*Non-nil means put two spaces after a colon when filling."
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63 :type 'boolean
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64 :group 'fill)
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209
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65
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66 (defvar fill-paragraph-function nil
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67 "Mode-specific function to fill a paragraph, or nil if there is none.
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68 If the function returns nil, then `fill-paragraph' does its normal work.")
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69
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70 (defun set-fill-prefix ()
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71 "Set the fill prefix to the current line up to point.
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72 Filling expects lines to start with the fill prefix and
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73 reinserts the fill prefix in each resulting line."
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74 (interactive)
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75 (setq fill-prefix (buffer-substring
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76 (save-excursion (move-to-left-margin) (point))
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77 (point)))
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78 (if (equal fill-prefix "")
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79 (setq fill-prefix nil))
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80 (if fill-prefix
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81 (message "fill-prefix: \"%s\"" fill-prefix)
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82 (message "fill-prefix cancelled")))
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83
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227
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84 (defcustom adaptive-fill-mode t
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85 "*Non-nil means determine a paragraph's fill prefix from its text."
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86 :type 'boolean
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87 :group 'fill)
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209
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88
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89 ;; #### - this is still weak. Yeah, there's filladapt, but this should
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90 ;; still be better... --Stig
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227
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91 (defcustom adaptive-fill-regexp (purecopy "[ \t]*\\([#;>*]+ +\\)?")
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209
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92 "*Regexp to match text at start of line that constitutes indentation.
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93 If Adaptive Fill mode is enabled, whatever text matches this pattern
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94 on the second line of a paragraph is used as the standard indentation
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95 for the paragraph. If the paragraph has just one line, the indentation
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227
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96 is taken from that line."
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97 :type 'regexp
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98 :group 'fill)
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209
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99
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227
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100 (defcustom adaptive-fill-function nil
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209
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101 "*Function to call to choose a fill prefix for a paragraph.
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227
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102 This function is used when `adaptive-fill-regexp' does not match."
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103 :type 'function
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104 :group 'fill)
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209
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105
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106 ;; Added for kinsoku processing. Use this instead of
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107 ;; (skip-chars-backward "^ \t\n")
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108 ;; (skip-chars-backward "^ \n" linebeg)
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109 (defun fill-move-backward-to-break-point (regexp &optional lim)
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110 (let ((opoint (point)))
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111 ;; 93.8.23 by kawamoto@ics.es.osaka-u.ac.jp
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112 ;; case of first 'word' being longer than fill-column
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113 (if (not (re-search-backward regexp lim 'move))
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114 nil
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115 ;; we have skipped backward SPC or WAN (word-across-newline). So move point forward again.
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116 (forward-char)
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117 (if (< opoint (point))
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118 (forward-char -1)))))
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119
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120 ;; Added for kinsoku processing. Use instead of
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121 ;; (re-search-forward "[ \t]" opoint t)
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122 ;; (skip-chars-forward "^ \n")
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123 ;; (skip-chars-forward "^ \n")
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124 (defun fill-move-forward-to-break-point (regexp &optional lim)
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125 (let ((opoint (point)))
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126 (if (not (re-search-forward regexp lim 'move))
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127 nil
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128 (forward-char -1)
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129 (if (< (point) opoint)
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130 (forward-char))))
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131 (if (featurep 'mule) (kinsoku-process-extend)))
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132
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133 (defun fill-end-of-sentence-p ()
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134 (save-excursion
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135 (skip-chars-backward " ]})\"'")
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136 (memq (char-before (point)) '(?. ?? ?!))))
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137
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138 (defun current-fill-column ()
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139 "Return the fill-column to use for this line.
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140 The fill-column to use for a buffer is stored in the variable `fill-column',
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141 but can be locally modified by the `right-margin' text property, which is
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142 subtracted from `fill-column'.
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143
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144 The fill column to use for a line is the first column at which the column
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145 number equals or exceeds the local fill-column - right-margin difference."
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146 (save-excursion
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147 (if fill-column
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148 (let* ((here (progn (beginning-of-line) (point)))
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149 (here-col 0)
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150 (eol (progn (end-of-line) (point)))
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151 margin fill-col change col)
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152 ;; Look separately at each region of line with a different right-margin.
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153 (while (and (setq margin (get-text-property here 'right-margin)
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154 fill-col (- fill-column (or margin 0))
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155 change (text-property-not-all
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156 here eol 'right-margin margin))
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157 (progn (goto-char (1- change))
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158 (setq col (current-column))
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159 (< col fill-col)))
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160 (setq here change
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161 here-col col))
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162 (max here-col fill-col)))))
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163
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164 (defun canonically-space-region (beg end)
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165 "Remove extra spaces between words in region.
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166 Leave one space between words, two at end of sentences or after colons
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167 \(depending on values of `sentence-end-double-space' and `colon-double-space').
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168 Remove indentation from each line."
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169 (interactive "r")
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170 ;;;### 97/3/14 jhod: Do I have to add anything here for kinsoku?
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171 (save-excursion
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172 (goto-char beg)
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173 ;; XEmacs - (ENE/stig from fa-extras.el): Skip the start of a comment.
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174 (and comment-start-skip
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175 (looking-at comment-start-skip)
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176 (goto-char (match-end 0)))
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177 ;; Nuke tabs; they get screwed up in a fill.
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178 ;; This is quick, but loses when a tab follows the end of a sentence.
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179 ;; Actually, it is difficult to tell that from "Mr.\tSmith".
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180 ;; Blame the typist.
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181 (subst-char-in-region beg end ?\t ?\ )
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182 (while (and (< (point) end)
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183 (re-search-forward " *" end t))
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184 (delete-region
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185 (+ (match-beginning 0)
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186 ;; Determine number of spaces to leave:
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187 (save-excursion
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188 (skip-chars-backward " ]})\"'")
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189 (cond ((and sentence-end-double-space
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190 (memq (char-before (point)) '(?. ?? ?!))) 2)
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191 ((and colon-double-space
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192 (eq (char-before (point)) ?:)) 2)
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193 ((char-equal (char-before (point)) ?\n) 0)
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194 (t 1))))
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195 (match-end 0)))
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196 ;; Make sure sentences ending at end of line get an extra space.
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197 ;; loses on split abbrevs ("Mr.\nSmith")
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198 (goto-char beg)
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199 (while (and (< (point) end)
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200 (re-search-forward "[.?!][])}\"']*$" end t))
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201 ;; We insert before markers in case a caller such as
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202 ;; do-auto-fill has done a save-excursion with point at the end
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203 ;; of the line and wants it to stay at the end of the line.
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204 (insert ? ))))
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205 ;; XEmacs: we don't have this function.
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206 ;; (insert-before-markers-and-inherit ? ))))
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207
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208 ;; XEmacs -- added DONT-SKIP-FIRST. Port of older code changes by Stig.
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209 ;; #### probably this junk is broken -- do-auto-fill doesn't actually use
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210 ;; it. If so, it should be removed.
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211
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212 (defun fill-context-prefix (from to &optional first-line-regexp
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213 dont-skip-first)
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214 "Compute a fill prefix from the text between FROM and TO.
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215 This uses the variables `adaptive-fill-prefix' and `adaptive-fill-function'.
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216 If FIRST-LINE-REGEXP is non-nil, then when taking a prefix from the
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217 first line, insist it must match FIRST-LINE-REGEXP."
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218 (save-excursion
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219 (goto-char from)
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220 (if (eolp) (forward-line 1))
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221 ;; Move to the second line unless there is just one.
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222 (let ((firstline (point))
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223 ;; Non-nil if we are on the second line.
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224 at-second
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225 result)
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226 ;; XEmacs change
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227 (if (not dont-skip-first)
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228 (forward-line 1))
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229 (if (>= (point) to)
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230 (goto-char firstline)
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231 (setq at-second t))
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232 (move-to-left-margin)
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233 ;; XEmacs change
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234 (let ((start (point))
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235 ; jhod: no longer used?
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236 ;(eol (save-excursion (end-of-line) (point)))
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237 )
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238 (setq result
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239 (if (not (looking-at paragraph-start))
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240 (cond ((and adaptive-fill-regexp (looking-at adaptive-fill-regexp))
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241 (buffer-substring-no-properties start (match-end 0)))
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242 (adaptive-fill-function (funcall adaptive-fill-function)))))
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243 (and result
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244 (or at-second
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245 (null first-line-regexp)
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246 (string-match first-line-regexp result))
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247 result)))))
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248
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249 ;; XEmacs (stig) - this is pulled out of fill-region-as-paragraph so that it
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250 ;; can also be called from do-auto-fill
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251 ;; #### But it's not used there. Chuck pulled it out because it broke things.
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252 (defun maybe-adapt-fill-prefix (&optional from to dont-skip-first)
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253 (if (and adaptive-fill-mode
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254 (or (null fill-prefix) (string= fill-prefix "")))
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255 (setq fill-prefix (fill-context-prefix from to nil dont-skip-first))))
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256
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257 (defun fill-region-as-paragraph (from to &optional justify
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258 nosqueeze squeeze-after)
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259 "Fill the region as one paragraph.
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260 It removes any paragraph breaks in the region and extra newlines at the end,
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261 indents and fills lines between the margins given by the
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262 `current-left-margin' and `current-fill-column' functions.
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263 It leaves point at the beginning of the line following the paragraph.
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264
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265 Normally performs justification according to the `current-justification'
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266 function, but with a prefix arg, does full justification instead.
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267
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268 From a program, optional third arg JUSTIFY can specify any type of
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269 justification. Fourth arg NOSQUEEZE non-nil means not to make spaces
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270 between words canonical before filling. Fifth arg SQUEEZE-AFTER, if non-nil,
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271 means don't canonicalize spaces before that position.
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272
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273 If `sentence-end-double-space' is non-nil, then period followed by one
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274 space does not end a sentence, so don't break a line there."
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275 (interactive
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276 (progn
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277 ;; XEmacs addition:
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278 (barf-if-buffer-read-only nil (region-beginning) (region-end))
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279 (list (region-beginning) (region-end)
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280 (if current-prefix-arg 'full))))
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281 ;; Arrange for undoing the fill to restore point.
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282 (if (and buffer-undo-list (not (eq buffer-undo-list t)))
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283 (setq buffer-undo-list (cons (point) buffer-undo-list)))
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284
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285 ;; Make sure "to" is the endpoint.
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286 (goto-char (min from to))
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287 (setq to (max from to))
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288 ;; Ignore blank lines at beginning of region.
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289 (skip-chars-forward " \t\n")
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290
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291 (let ((from-plus-indent (point))
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292 (oneleft nil))
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293
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294 (beginning-of-line)
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295 (setq from (point))
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296
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297 ;; Delete all but one soft newline at end of region.
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298 ;; And leave TO before that one.
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299 (goto-char to)
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300 (while (and (> (point) from) (eq ?\n (char-after (1- (point)))))
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301 (if (and oneleft
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302 (not (and use-hard-newlines
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303 (get-text-property (1- (point)) 'hard))))
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304 (delete-backward-char 1)
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305 (backward-char 1)
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306 (setq oneleft t)))
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307 (setq to (point))
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308
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309 ;; If there was no newline, and there is text in the paragraph, then
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310 ;; create a newline.
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311 (if (and (not oneleft) (> to from-plus-indent))
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312 (newline))
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313 (goto-char from-plus-indent))
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314
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315 (if (not (> to (point)))
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316 nil ; There is no paragraph, only whitespace: exit now.
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317
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318 (or justify (setq justify (current-justification)))
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319
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320 ;; Don't let Adaptive Fill mode alter the fill prefix permanently.
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321 (let ((fill-prefix fill-prefix))
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322 ;; Figure out how this paragraph is indented, if desired.
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323 ;; XEmacs: move some code here to a separate function.
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324 (maybe-adapt-fill-prefix from to t)
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325
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326 (save-restriction
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327 (goto-char from)
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328 (beginning-of-line)
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329 (narrow-to-region (point) to)
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330
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331 (if (not justify) ; filling disabled: just check indentation
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332 (progn
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333 (goto-char from)
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334 (while (not (eobp))
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335 (if (and (not (eolp))
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336 (< (current-indentation) (current-left-margin)))
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337 (indent-to-left-margin))
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338 (forward-line 1)))
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339
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340 (if use-hard-newlines
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341 (remove-text-properties from (point-max) '(hard nil)))
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342 ;; Make sure first line is indented (at least) to left margin...
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343 (if (or (memq justify '(right center))
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344 (< (current-indentation) (current-left-margin)))
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345 (indent-to-left-margin))
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346 ;; Delete the fill prefix from every line except the first.
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347 ;; The first line may not even have a fill prefix.
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348 (goto-char from)
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349 (let ((fpre (and fill-prefix (not (equal fill-prefix ""))
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350 (concat "[ \t]*"
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351 (regexp-quote fill-prefix)
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352 "[ \t]*"))))
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353 (and fpre
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354 (progn
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355 (if (>= (+ (current-left-margin) (length fill-prefix))
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356 (current-fill-column))
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357 (error "fill-prefix too long for specified width"))
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358 (goto-char from)
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359 (forward-line 1)
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360 (while (not (eobp))
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361 (if (looking-at fpre)
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362 (delete-region (point) (match-end 0)))
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363 (forward-line 1))
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364 (goto-char from)
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365 (if (looking-at fpre)
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366 (goto-char (match-end 0)))
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367 (setq from (point)))))
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368 ;; Remove indentation from lines other than the first.
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369 (beginning-of-line 2)
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370 (indent-region (point) (point-max) 0)
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371 (goto-char from)
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372
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373 ;; FROM, and point, are now before the text to fill,
|
|
|
374 ;; but after any fill prefix on the first line.
|
|
|
375
|
|
|
376 ;; Make sure sentences ending at end of line get an extra space.
|
|
|
377 ;; loses on split abbrevs ("Mr.\nSmith")
|
|
|
378 (while (re-search-forward "[.?!][])}\"']*$" nil t)
|
|
|
379 ;; XEmacs change (no insert-and-inherit)
|
|
|
380 (or (eobp) (insert ?\ ?\ )))
|
|
|
381 (goto-char from)
|
|
|
382 (skip-chars-forward " \t")
|
|
|
383 ;; Then change all newlines to spaces.
|
|
|
384 ;;; 97/3/14 jhod: Kinsoku change
|
|
|
385 ;; Spacing is not necessary for charcters of no word-separater.
|
|
|
386 ;; The regexp word-across-newline is used for this check.
|
|
|
387 (if (not (and (featurep 'mule)
|
|
|
388 (stringp word-across-newline)))
|
|
|
389 (subst-char-in-region from (point-max) ?\n ?\ )
|
|
|
390 ;;
|
|
|
391 ;; WAN +NL+WAN --> WAN + WAN
|
|
|
392 ;; not(WAN)+NL+WAN --> not(WAN) + WAN
|
|
|
393 ;; WAN +NL+not(WAN) --> WAN + not(WAN)
|
|
|
394 ;; SPC +NL+not(WAN) --> SPC + not(WAN)
|
|
|
395 ;; not(WAN)+NL+not(WAN) --> not(WAN) + SPC + not(WAN)
|
|
|
396 ;;
|
|
|
397 (goto-char from)
|
|
|
398 (end-of-line)
|
|
|
399 (while (not (eobp))
|
|
|
400 ;; Insert SPC only when point is between nonWAN. Insert
|
|
|
401 ;; before deleting to preserve marker if possible.
|
|
|
402 (if (or (prog2 ; check following char.
|
|
|
403 (forward-char) ; skip newline
|
|
|
404 (or (eobp)
|
|
|
405 (looking-at word-across-newline))
|
|
|
406 (forward-char -1))
|
|
|
407 (prog2 ; check previous char.
|
|
|
408 (forward-char -1)
|
|
|
409 (or (eq (char-after (point)) ?\ )
|
|
|
410 (looking-at word-across-newline))
|
|
|
411 (forward-char)))
|
|
|
412 nil
|
|
|
413 (insert ?\ ))
|
|
|
414 (delete-char 1) ; delete newline
|
|
|
415 (end-of-line)))
|
|
|
416 ;; end patch
|
|
|
417 (goto-char from)
|
|
|
418 (skip-chars-forward " \t")
|
|
|
419 (if (and nosqueeze (not (eq justify 'full)))
|
|
|
420 nil
|
|
|
421 (canonically-space-region (or squeeze-after (point)) (point-max))
|
|
|
422 (goto-char (point-max))
|
|
|
423 (delete-horizontal-space)
|
|
|
424 ;; XEmacs change (no insert-and-inherit)
|
|
|
425 (insert " "))
|
|
|
426 (goto-char (point-min))
|
|
|
427
|
|
|
428 ;; This is the actual filling loop.
|
|
|
429 (let ((prefixcol 0) linebeg
|
|
|
430 (re-break-point (if (featurep 'mule)
|
|
|
431 (concat "[ \n\t]\\|" word-across-newline)
|
|
|
432 "[ \n\t]")))
|
|
|
433 (while (not (eobp))
|
|
|
434 (setq linebeg (point))
|
|
|
435 (move-to-column (1+ (current-fill-column)))
|
|
|
436 (if (eobp)
|
|
|
437 (or nosqueeze (delete-horizontal-space))
|
|
|
438 ;; Move back to start of word.
|
|
|
439 ;; 97/3/14 jhod: Kinsoku
|
|
|
440 ;(skip-chars-backward "^ \n" linebeg)
|
|
|
441 (fill-move-backward-to-break-point re-break-point linebeg)
|
|
|
442 ;; end patch
|
|
|
443 ;; Don't break after a period followed by just one space.
|
|
|
444 ;; Move back to the previous place to break.
|
|
|
445 ;; The reason is that if a period ends up at the end of a line,
|
|
|
446 ;; further fills will assume it ends a sentence.
|
|
|
447 ;; If we now know it does not end a sentence,
|
|
|
448 ;; avoid putting it at the end of the line.
|
|
|
449 (if sentence-end-double-space
|
|
|
450 (while (and (> (point) (+ linebeg 2))
|
|
|
451 (eq (char-before (point)) ?\ )
|
|
|
452 (not (eq (char-after (point)) ?\ ))
|
|
|
453 (eq (char-after (- (point) 2)) ?\.))
|
|
|
454 (forward-char -2)
|
|
|
455 ;; 97/3/14 jhod: Kinsoku
|
|
|
456 ;(skip-chars-backward "^ \n" linebeg)))
|
|
|
457 (fill-move-backward-to-break-point re-break-point linebeg)))
|
|
|
458 (if (featurep 'mule) (kinsoku-process))
|
|
|
459 ;end patch
|
|
|
460
|
|
|
461 ;; If the left margin and fill prefix by themselves
|
|
|
462 ;; pass the fill-column. or if they are zero
|
|
|
463 ;; but we have no room for even one word,
|
|
|
464 ;; keep at least one word anyway.
|
|
|
465 ;; This handles ALL BUT the first line of the paragraph.
|
|
|
466 (if (if (zerop prefixcol)
|
|
|
467 (save-excursion
|
|
|
468 (skip-chars-backward " \t" linebeg)
|
|
|
469 (bolp))
|
|
|
470 (>= prefixcol (current-column)))
|
|
|
471 ;; Ok, skip at least one word.
|
|
|
472 ;; Meanwhile, don't stop at a period followed by one space.
|
|
|
473 (let ((first t))
|
|
|
474 (move-to-column prefixcol)
|
|
|
475 (while (and (not (eobp))
|
|
|
476 (or first
|
|
|
477 (and (not (bobp))
|
|
|
478 sentence-end-double-space
|
|
|
479 (save-excursion (forward-char -1)
|
|
|
480 (and (looking-at "\\. ")
|
|
|
481 (not (looking-at "\\. ")))))))
|
|
|
482 (skip-chars-forward " \t")
|
|
|
483 ;; 94/3/14 jhod: Kinsoku
|
|
|
484 ;(skip-chars-forward "^ \n\t")
|
|
|
485 (fill-move-forward-to-break-point re-break-point)
|
|
|
486 ;; end patch
|
|
|
487 (setq first nil)))
|
|
|
488 ;; Normally, move back over the single space between the words.
|
|
|
489 (if (eq (char-before (point)) ?\ )
|
|
|
490 (forward-char -1)))
|
|
|
491 ;; If the left margin and fill prefix by themselves
|
|
|
492 ;; pass the fill-column, keep at least one word.
|
|
|
493 ;; This handles the first line of the paragraph.
|
|
|
494 (if (and (zerop prefixcol)
|
|
|
495 (let ((fill-point (point)) nchars)
|
|
|
496 (save-excursion
|
|
|
497 (move-to-left-margin)
|
|
|
498 (setq nchars (- fill-point (point)))
|
|
|
499 (or (< nchars 0)
|
|
|
500 (and fill-prefix
|
|
|
501 (< nchars (length fill-prefix))
|
|
|
502 (string= (buffer-substring (point) fill-point)
|
|
|
503 (substring fill-prefix 0 nchars)))))))
|
|
|
504 ;; Ok, skip at least one word. But
|
|
|
505 ;; don't stop at a period followed by just one space.
|
|
|
506 (let ((first t))
|
|
|
507 (while (and (not (eobp))
|
|
|
508 (or first
|
|
|
509 (and (not (bobp))
|
|
|
510 sentence-end-double-space
|
|
|
511 (save-excursion (forward-char -1)
|
|
|
512 (and (looking-at "\\. ")
|
|
|
513 (not (looking-at "\\. ")))))))
|
|
|
514 (skip-chars-forward " \t")
|
|
|
515 ;; 97/3/14 jhod: Kinsoku
|
|
|
516 ;(skip-chars-forward "^ \t\n")
|
|
|
517 (fill-move-forward-to-break-point re-break-point)
|
|
|
518 ;; end patch
|
|
|
519 (setq first nil))))
|
|
|
520 ;; Check again to see if we got to the end of the paragraph.
|
|
|
521 (if (save-excursion (skip-chars-forward " \t") (eobp))
|
|
|
522 (or nosqueeze (delete-horizontal-space))
|
|
|
523 ;; Replace whitespace here with one newline, then indent to left
|
|
|
524 ;; margin.
|
|
|
525 (skip-chars-backward " \t")
|
|
|
526 ;; 97/3/14 jhod: More kinsoku stuff
|
|
|
527 (if (featurep 'mule)
|
|
|
528 ;; WAN means chars which match word-across-newline.
|
|
|
529 ;; (0) | SPC + SPC* <EOB> --> NL
|
|
|
530 ;; (1) WAN | SPC + SPC* --> WAN + SPC + NL
|
|
|
531 ;; (2) | SPC + SPC* + WAN --> SPC + NL + WAN
|
|
|
532 ;; (3) '.' | SPC + nonSPC --> '.' + SPC + NL + nonSPC
|
|
|
533 ;; (4) '.' | SPC + SPC --> '.' + NL
|
|
|
534 ;; (5) | SPC* --> NL
|
|
|
535 (let ((start (point)) ; 92.6.30 by K.Handa
|
|
|
536 (ch (char-after (point))))
|
|
|
537 (if (and (= ch ? )
|
|
|
538 (progn ; not case (0) -- 92.6.30 by K.Handa
|
|
|
539 (skip-chars-forward " \t")
|
|
|
540 (not (eobp)))
|
|
|
541 (or
|
|
|
542 (progn ; case (1)
|
|
|
543 (goto-char start)
|
|
|
544 (forward-char -1)
|
|
|
545 (looking-at word-across-newline))
|
|
|
546 (progn ; case (2)
|
|
|
547 (goto-char start)
|
|
|
548 (skip-chars-forward " \t")
|
|
|
549 (and (not (eobp))
|
|
|
550 (looking-at word-across-newline)
|
|
|
551 ;; never leave space after the end of sentence
|
|
|
552 (not (fill-end-of-sentence-p))))
|
|
|
553 (progn ; case (3)
|
|
|
554 (goto-char (1+ start))
|
|
|
555 (and (not (eobp))
|
|
|
556 (not (eq (char-after (point)) ? ))
|
|
|
557 (fill-end-of-sentence-p)))))
|
|
|
558 ;; We should keep one SPACE before NEWLINE. (1),(2),(3)
|
|
|
559 (goto-char (1+ start))
|
|
|
560 ;; We should delete all SPACES around break point. (4),(5)
|
|
|
561 (goto-char start))))
|
|
|
562 ;; end of patch
|
|
|
563 (insert ?\n)
|
|
|
564 ;; Give newline the properties of the space(s) it replaces
|
|
|
565 (set-text-properties (1- (point)) (point)
|
|
|
566 (text-properties-at (point)))
|
|
|
567 (indent-to-left-margin)
|
|
|
568 ;; Insert the fill prefix after indentation.
|
|
|
569 ;; Set prefixcol so whitespace in the prefix won't get lost.
|
|
|
570 (and fill-prefix (not (equal fill-prefix ""))
|
|
|
571 (progn
|
|
|
572 (insert fill-prefix)
|
|
|
573 (setq prefixcol (current-column))))))
|
|
|
574 ;; Justify the line just ended, if desired.
|
|
|
575 (if justify
|
|
|
576 (if (save-excursion (skip-chars-forward " \t") (eobp))
|
|
|
577 (progn
|
|
|
578 (delete-horizontal-space)
|
|
|
579 (justify-current-line justify t t))
|
|
|
580 (forward-line -1)
|
|
|
581 (justify-current-line justify nil t)
|
|
|
582 (forward-line 1))))))
|
|
|
583 ;; Leave point after final newline.
|
|
|
584 (goto-char (point-max)))
|
|
|
585 (forward-char 1))))
|
|
|
586
|
|
|
587 (defun fill-paragraph (arg)
|
|
|
588 "Fill paragraph at or after point. Prefix arg means justify as well.
|
|
|
589 If `sentence-end-double-space' is non-nil, then period followed by one
|
|
|
590 space does not end a sentence, so don't break a line there.
|
|
|
591
|
|
|
592 If `fill-paragraph-function' is non-nil, we call it (passing our
|
|
|
593 argument to it), and if it returns non-nil, we simply return its value."
|
|
|
594 (interactive (list (if current-prefix-arg 'full)))
|
|
|
595 (or (and fill-paragraph-function
|
|
|
596 (let ((function fill-paragraph-function)
|
|
|
597 fill-paragraph-function)
|
|
|
598 (funcall function arg)))
|
|
|
599 (let ((before (point)))
|
|
|
600 (save-excursion
|
|
|
601 (forward-paragraph)
|
|
|
602 (or (bolp) (newline 1))
|
|
|
603 (let ((end (point))
|
|
|
604 (beg (progn (backward-paragraph) (point))))
|
|
|
605 (goto-char before)
|
|
|
606 (if use-hard-newlines
|
|
|
607 ;; Can't use fill-region-as-paragraph, since this paragraph may
|
|
|
608 ;; still contain hard newlines. See fill-region.
|
|
|
609 (fill-region beg end arg)
|
|
|
610 (fill-region-as-paragraph beg end arg)))))))
|
|
|
611
|
|
|
612 (defun fill-region (from to &optional justify nosqueeze to-eop)
|
|
|
613 "Fill each of the paragraphs in the region.
|
|
|
614 Prefix arg (non-nil third arg, if called from program) means justify as well.
|
|
|
615
|
|
|
616 Noninteractively, fourth arg NOSQUEEZE non-nil means to leave
|
|
|
617 whitespace other than line breaks untouched, and fifth arg TO-EOP
|
|
|
618 non-nil means to keep filling to the end of the paragraph (or next
|
|
|
619 hard newline, if `use-hard-newlines' is on).
|
|
|
620
|
|
|
621 If `sentence-end-double-space' is non-nil, then period followed by one
|
|
|
622 space does not end a sentence, so don't break a line there."
|
|
|
623 (interactive
|
|
|
624 (progn
|
|
|
625 ;; XEmacs addition:
|
|
|
626 (barf-if-buffer-read-only nil (region-beginning) (region-end))
|
|
|
627 (list (region-beginning) (region-end)
|
|
|
628 (if current-prefix-arg 'full))))
|
|
|
629 (let (end beg)
|
|
|
630 (save-restriction
|
|
|
631 (goto-char (max from to))
|
|
|
632 (if to-eop
|
|
|
633 (progn (skip-chars-backward "\n")
|
|
|
634 (forward-paragraph)))
|
|
|
635 (setq end (point))
|
|
|
636 (goto-char (setq beg (min from to)))
|
|
|
637 (beginning-of-line)
|
|
|
638 (narrow-to-region (point) end)
|
|
|
639 (while (not (eobp))
|
|
|
640 (let ((initial (point))
|
|
|
641 end)
|
|
|
642 ;; If using hard newlines, break at every one for filling
|
|
|
643 ;; purposes rather than using paragraph breaks.
|
|
|
644 (if use-hard-newlines
|
|
|
645 (progn
|
|
|
646 (while (and (setq end (text-property-any (point) (point-max)
|
|
|
647 'hard t))
|
|
|
648 (not (eq ?\n (char-after end)))
|
|
|
649 (not (= end (point-max))))
|
|
|
650 (goto-char (1+ end)))
|
|
|
651 (setq end (if end (min (point-max) (1+ end)) (point-max)))
|
|
|
652 (goto-char initial))
|
|
|
653 (forward-paragraph 1)
|
|
|
654 (setq end (point))
|
|
|
655 (forward-paragraph -1))
|
|
|
656 (if (< (point) beg)
|
|
|
657 (goto-char beg))
|
|
|
658 (if (>= (point) initial)
|
|
|
659 (fill-region-as-paragraph (point) end justify nosqueeze)
|
|
|
660 (goto-char end)))))))
|
|
|
661
|
|
|
662 ;; XEmacs addition: from Tim Bradshaw <tfb@edinburgh.ac.uk>
|
|
|
663 (defun fill-paragraph-or-region (arg)
|
|
|
664 "Fill the current region, if it's active; otherwise, fill the paragraph.
|
|
|
665 See `fill-paragraph' and `fill-region' for more information."
|
|
|
666 (interactive "*P")
|
|
|
667 (if (region-active-p)
|
|
|
668 (fill-region (point) (mark) arg)
|
|
|
669 (fill-paragraph arg)))
|
|
|
670
|
|
|
671
|
|
|
672 (defconst default-justification 'left
|
|
|
673 "*Method of justifying text not otherwise specified.
|
|
|
674 Possible values are `left', `right', `full', `center', or `none'.
|
|
|
675 The requested kind of justification is done whenever lines are filled.
|
|
|
676 The `justification' text-property can locally override this variable.
|
|
|
677 This variable automatically becomes buffer-local when set in any fashion.")
|
|
|
678 (make-variable-buffer-local 'default-justification)
|
|
|
679
|
|
|
680 (defun current-justification ()
|
|
|
681 "How should we justify this line?
|
|
|
682 This returns the value of the text-property `justification',
|
|
|
683 or the variable `default-justification' if there is no text-property.
|
|
|
684 However, it returns nil rather than `none' to mean \"don't justify\"."
|
|
|
685 (let ((j (or (get-text-property
|
|
|
686 ;; Make sure we're looking at paragraph body.
|
|
|
687 (save-excursion (skip-chars-forward " \t")
|
|
|
688 (if (and (eobp) (not (bobp)))
|
|
|
689 (1- (point)) (point)))
|
|
|
690 'justification)
|
|
|
691 default-justification)))
|
|
|
692 (if (eq 'none j)
|
|
|
693 nil
|
|
|
694 j)))
|
|
|
695
|
|
|
696 (defun set-justification (begin end value &optional whole-par)
|
|
|
697 "Set the region's justification style.
|
|
|
698 The kind of justification to use is prompted for.
|
|
|
699 If the mark is not active, this command operates on the current paragraph.
|
|
|
700 If the mark is active, the region is used. However, if the beginning and end
|
|
|
701 of the region are not at paragraph breaks, they are moved to the beginning and
|
|
|
702 end of the paragraphs they are in.
|
|
|
703 If `use-hard-newlines' is true, all hard newlines are taken to be paragraph
|
|
|
704 breaks.
|
|
|
705
|
|
|
706 When calling from a program, operates just on region between BEGIN and END,
|
|
|
707 unless optional fourth arg WHOLE-PAR is non-nil. In that case bounds are
|
|
|
708 extended to include entire paragraphs as in the interactive command."
|
|
|
709 ;; XEmacs change (was mark-active)
|
|
|
710 (interactive (list (if (region-active-p) (region-beginning) (point))
|
|
|
711 (if (region-active-p) (region-end) (point))
|
|
|
712 (let ((s (completing-read
|
|
|
713 "Set justification to: "
|
|
|
714 '(("left") ("right") ("full")
|
|
|
715 ("center") ("none"))
|
|
|
716 nil t)))
|
|
|
717 (if (equal s "") (error ""))
|
|
|
718 (intern s))
|
|
|
719 t))
|
|
|
720 (save-excursion
|
|
|
721 (save-restriction
|
|
|
722 (if whole-par
|
|
|
723 (let ((paragraph-start (if use-hard-newlines "." paragraph-start))
|
|
|
724 (paragraph-ignore-fill-prefix (if use-hard-newlines t
|
|
|
725 paragraph-ignore-fill-prefix)))
|
|
|
726 (goto-char begin)
|
|
|
727 (while (and (bolp) (not (eobp))) (forward-char 1))
|
|
|
728 (backward-paragraph)
|
|
|
729 (setq begin (point))
|
|
|
730 (goto-char end)
|
|
|
731 (skip-chars-backward " \t\n" begin)
|
|
|
732 (forward-paragraph)
|
|
|
733 (setq end (point))))
|
|
|
734
|
|
|
735 (narrow-to-region (point-min) end)
|
|
|
736 (unjustify-region begin (point-max))
|
|
|
737 (put-text-property begin (point-max) 'justification value)
|
|
|
738 (fill-region begin (point-max) nil t))))
|
|
|
739
|
|
|
740 (defun set-justification-none (b e)
|
|
|
741 "Disable automatic filling for paragraphs in the region.
|
|
|
742 If the mark is not active, this applies to the current paragraph."
|
|
|
743 ;; XEmacs change (was mark-active)
|
|
|
744 (interactive (list (if (region-active-p) (region-beginning) (point))
|
|
|
745 (if (region-active-p) (region-end) (point))))
|
|
|
746 (set-justification b e 'none t))
|
|
|
747
|
|
|
748 (defun set-justification-left (b e)
|
|
|
749 "Make paragraphs in the region left-justified.
|
|
|
750 This is usually the default, but see the variable `default-justification'.
|
|
|
751 If the mark is not active, this applies to the current paragraph."
|
|
|
752 ;; XEmacs change (was mark-active)
|
|
|
753 (interactive (list (if (region-active-p) (region-beginning) (point))
|
|
|
754 (if (region-active-p) (region-end) (point))))
|
|
|
755 (set-justification b e 'left t))
|
|
|
756
|
|
|
757 (defun set-justification-right (b e)
|
|
|
758 "Make paragraphs in the region right-justified:
|
|
|
759 Flush at the right margin and ragged on the left.
|
|
|
760 If the mark is not active, this applies to the current paragraph."
|
|
|
761 ;; XEmacs change (was mark-active)
|
|
|
762 (interactive (list (if (region-active-p) (region-beginning) (point))
|
|
|
763 (if (region-active-p) (region-end) (point))))
|
|
|
764 (set-justification b e 'right t))
|
|
|
765
|
|
|
766 (defun set-justification-full (b e)
|
|
|
767 "Make paragraphs in the region fully justified:
|
|
|
768 This makes lines flush on both margins by inserting spaces between words.
|
|
|
769 If the mark is not active, this applies to the current paragraph."
|
|
|
770 ;; XEmacs change (was mark-active)
|
|
|
771 (interactive (list (if (region-active-p) (region-beginning) (point))
|
|
|
772 (if (region-active-p) (region-end) (point))))
|
|
|
773 (set-justification b e 'full t))
|
|
|
774
|
|
|
775 (defun set-justification-center (b e)
|
|
|
776 "Make paragraphs in the region centered.
|
|
|
777 If the mark is not active, this applies to the current paragraph."
|
|
|
778 ;; XEmacs change (was mark-active)
|
|
|
779 (interactive (list (if (region-active-p) (region-beginning) (point))
|
|
|
780 (if (region-active-p) (region-end) (point))))
|
|
|
781 (set-justification b e 'center t))
|
|
|
782
|
|
|
783 ;; 97/3/14 jhod: This functions are added for Kinsoku support
|
|
|
784 (defun find-space-insertable-point ()
|
|
|
785 "Search backward for a permissable point for inserting justification spaces"
|
|
|
786 (if (boundp 'space-insertable)
|
|
|
787 (if (re-search-backward space-insertable nil t)
|
|
|
788 (progn (forward-char 1)
|
|
|
789 t)
|
|
|
790 nil)
|
|
|
791 (search-backward " " nil t)))
|
|
|
792
|
|
|
793 ;; A line has up to six parts:
|
|
|
794 ;;
|
|
|
795 ;; >>> hello.
|
|
|
796 ;; [Indent-1][FP][ Indent-2 ][text][trailing whitespace][newline]
|
|
|
797 ;;
|
|
|
798 ;; "Indent-1" is the left-margin indentation; normally it ends at column
|
|
|
799 ;; given by the `current-left-margin' function.
|
|
|
800 ;; "FP" is the fill-prefix. It can be any string, including whitespace.
|
|
|
801 ;; "Indent-2" is added to justify a line if the `current-justification' is
|
|
|
802 ;; `center' or `right'. In `left' and `full' justification regions, any
|
|
|
803 ;; whitespace there is part of the line's text, and should not be changed.
|
|
|
804 ;; Trailing whitespace is not counted as part of the line length when
|
|
|
805 ;; center- or right-justifying.
|
|
|
806 ;;
|
|
|
807 ;; All parts of the line are optional, although the final newline can
|
|
|
808 ;; only be missing on the last line of the buffer.
|
|
|
809
|
|
|
810 (defun justify-current-line (&optional how eop nosqueeze)
|
|
|
811 "Do some kind of justification on this line.
|
|
|
812 Normally does full justification: adds spaces to the line to make it end at
|
|
|
813 the column given by `current-fill-column'.
|
|
|
814 Optional first argument HOW specifies alternate type of justification:
|
|
|
815 it can be `left', `right', `full', `center', or `none'.
|
|
|
816 If HOW is t, will justify however the `current-justification' function says to.
|
|
|
817 If HOW is nil or missing, full justification is done by default.
|
|
|
818 Second arg EOP non-nil means that this is the last line of the paragraph, so
|
|
|
819 it will not be stretched by full justification.
|
|
|
820 Third arg NOSQUEEZE non-nil means to leave interior whitespace unchanged,
|
|
|
821 otherwise it is made canonical."
|
|
|
822 (interactive)
|
|
|
823 (if (eq t how) (setq how (or (current-justification) 'none))
|
|
|
824 (if (null how) (setq how 'full)
|
|
|
825 (or (memq how '(none left right center))
|
|
|
826 (setq how 'full))))
|
|
|
827 (or (memq how '(none left)) ; No action required for these.
|
|
|
828 (let ((fc (current-fill-column))
|
|
|
829 (pos (point-marker))
|
|
|
830 fp-end ; point at end of fill prefix
|
|
|
831 beg ; point at beginning of line's text
|
|
|
832 end ; point at end of line's text
|
|
|
833 indent ; column of `beg'
|
|
|
834 endcol ; column of `end'
|
|
|
835 ncols) ; new indent point or offset
|
|
|
836 (end-of-line)
|
|
|
837 ;; Check if this is the last line of the paragraph.
|
|
|
838 (if (and use-hard-newlines (null eop)
|
|
|
839 (get-text-property (point) 'hard))
|
|
|
840 (setq eop t))
|
|
|
841 (skip-chars-backward " \t")
|
|
|
842 ;; Quick exit if it appears to be properly justified already
|
|
|
843 ;; or there is no text.
|
|
|
844 (if (or (bolp)
|
|
|
845 (and (memq how '(full right))
|
|
|
846 (= (current-column) fc)))
|
|
|
847 nil
|
|
|
848 (setq end (point))
|
|
|
849 (beginning-of-line)
|
|
|
850 (skip-chars-forward " \t")
|
|
|
851 ;; Skip over fill-prefix.
|
|
|
852 (if (and fill-prefix
|
|
|
853 (not (string-equal fill-prefix ""))
|
|
|
854 (equal fill-prefix
|
|
|
855 (buffer-substring
|
|
|
856 (point) (min (point-max) (+ (length fill-prefix)
|
|
|
857 (point))))))
|
|
|
858 (forward-char (length fill-prefix))
|
|
|
859 (if (and adaptive-fill-mode
|
|
|
860 (looking-at adaptive-fill-regexp))
|
|
|
861 (goto-char (match-end 0))))
|
|
|
862 (setq fp-end (point))
|
|
|
863 (skip-chars-forward " \t")
|
|
|
864 ;; This is beginning of the line's text.
|
|
|
865 (setq indent (current-column))
|
|
|
866 (setq beg (point))
|
|
|
867 (goto-char end)
|
|
|
868 (setq endcol (current-column))
|
|
|
869
|
|
|
870 ;; HOW can't be null or left--we would have exited already
|
|
|
871 (cond ((eq 'right how)
|
|
|
872 (setq ncols (- fc endcol))
|
|
|
873 (if (< ncols 0)
|
|
|
874 ;; Need to remove some indentation
|
|
|
875 (delete-region
|
|
|
876 (progn (goto-char fp-end)
|
|
|
877 (if (< (current-column) (+ indent ncols))
|
|
|
878 (move-to-column (+ indent ncols) t))
|
|
|
879 (point))
|
|
|
880 (progn (move-to-column indent) (point)))
|
|
|
881 ;; Need to add some
|
|
|
882 (goto-char beg)
|
|
|
883 (indent-to (+ indent ncols))
|
|
|
884 ;; If point was at beginning of text, keep it there.
|
|
|
885 (if (= beg pos)
|
|
|
886 (move-marker pos (point)))))
|
|
|
887
|
|
|
888 ((eq 'center how)
|
|
|
889 ;; Figure out how much indentation is needed
|
|
|
890 (setq ncols (+ (current-left-margin)
|
|
|
891 (/ (- fc (current-left-margin) ;avail. space
|
|
|
892 (- endcol indent)) ;text width
|
|
|
893 2)))
|
|
|
894 (if (< ncols indent)
|
|
|
895 ;; Have too much indentation - remove some
|
|
|
896 (delete-region
|
|
|
897 (progn (goto-char fp-end)
|
|
|
898 (if (< (current-column) ncols)
|
|
|
899 (move-to-column ncols t))
|
|
|
900 (point))
|
|
|
901 (progn (move-to-column indent) (point)))
|
|
|
902 ;; Have too little - add some
|
|
|
903 (goto-char beg)
|
|
|
904 (indent-to ncols)
|
|
|
905 ;; If point was at beginning of text, keep it there.
|
|
|
906 (if (= beg pos)
|
|
|
907 (move-marker pos (point)))))
|
|
|
908
|
|
|
909 ((eq 'full how)
|
|
|
910 ;; Insert extra spaces between words to justify line
|
|
|
911 (save-restriction
|
|
|
912 (narrow-to-region beg end)
|
|
|
913 (or nosqueeze
|
|
|
914 (canonically-space-region beg end))
|
|
|
915 (goto-char (point-max))
|
|
|
916 (setq ncols (- fc endcol))
|
|
|
917 ;; Ncols is number of additional spaces needed
|
|
|
918 (if (> ncols 0)
|
|
|
919 (if (and (not eop)
|
|
|
920 ;; 97/3/14 jhod: Kinsoku
|
|
|
921 (find-space-insertable-point)) ;(search-backward " " nil t))
|
|
|
922 (while (> ncols 0)
|
|
|
923 (let ((nmove (+ 3 (random 3))))
|
|
|
924 (while (> nmove 0)
|
|
|
925 (or (find-space-insertable-point) ;(search-backward " " nil t)
|
|
|
926 (progn
|
|
|
927 (goto-char (point-max))
|
|
|
928 (find-space-insertable-point))) ;(search-backward " ")))
|
|
|
929 (skip-chars-backward " ")
|
|
|
930 (setq nmove (1- nmove))))
|
|
|
931 ;; XEmacs change
|
|
|
932 (insert " ")
|
|
|
933 (skip-chars-backward " ")
|
|
|
934 (setq ncols (1- ncols)))))))
|
|
|
935 (t (error "Unknown justification value"))))
|
|
|
936 (goto-char pos)
|
|
|
937 (move-marker pos nil)))
|
|
|
938 nil)
|
|
|
939
|
|
|
940 (defun unjustify-current-line ()
|
|
|
941 "Remove justification whitespace from current line.
|
|
|
942 If the line is centered or right-justified, this function removes any
|
|
|
943 indentation past the left margin. If the line is full-justified, it removes
|
|
|
944 extra spaces between words. It does nothing in other justification modes."
|
|
|
945 (let ((justify (current-justification)))
|
|
|
946 (cond ((eq 'left justify) nil)
|
|
|
947 ((eq nil justify) nil)
|
|
|
948 ((eq 'full justify) ; full justify: remove extra spaces
|
|
|
949 (beginning-of-line-text)
|
|
|
950 (canonically-space-region
|
|
|
951 (point) (save-excursion (end-of-line) (point))))
|
|
|
952 ((memq justify '(center right))
|
|
|
953 (save-excursion
|
|
|
954 (move-to-left-margin nil t)
|
|
|
955 ;; Position ourselves after any fill-prefix.
|
|
|
956 (if (and fill-prefix
|
|
|
957 (not (string-equal fill-prefix ""))
|
|
|
958 (equal fill-prefix
|
|
|
959 (buffer-substring
|
|
|
960 (point) (min (point-max) (+ (length fill-prefix)
|
|
|
961 (point))))))
|
|
|
962 (forward-char (length fill-prefix)))
|
|
|
963 (delete-region (point) (progn (skip-chars-forward " \t")
|
|
|
964 (point))))))))
|
|
|
965
|
|
|
966 (defun unjustify-region (&optional begin end)
|
|
|
967 "Remove justification whitespace from region.
|
|
|
968 For centered or right-justified regions, this function removes any indentation
|
|
|
969 past the left margin from each line. For full-justified lines, it removes
|
|
|
970 extra spaces between words. It does nothing in other justification modes.
|
|
|
971 Arguments BEGIN and END are optional; default is the whole buffer."
|
|
|
972 (save-excursion
|
|
|
973 (save-restriction
|
|
|
974 (if end (narrow-to-region (point-min) end))
|
|
|
975 (goto-char (or begin (point-min)))
|
|
|
976 (while (not (eobp))
|
|
|
977 (unjustify-current-line)
|
|
|
978 (forward-line 1)))))
|
|
|
979
|
|
|
980
|
|
|
981 (defun fill-nonuniform-paragraphs (min max &optional justifyp mailp)
|
|
|
982 "Fill paragraphs within the region, allowing varying indentation within each.
|
|
|
983 This command divides the region into \"paragraphs\",
|
|
|
984 only at paragraph-separator lines, then fills each paragraph
|
|
|
985 using as the fill prefix the smallest indentation of any line
|
|
|
986 in the paragraph.
|
|
|
987
|
|
|
988 When calling from a program, pass range to fill as first two arguments.
|
|
|
989
|
|
|
990 Optional third and fourth arguments JUSTIFY and MAIL-FLAG:
|
|
|
991 JUSTIFY to justify paragraphs (prefix arg),
|
|
|
992 MAIL-FLAG for a mail message, i. e. don't fill header lines."
|
|
|
993 (interactive (list (region-beginning) (region-end)
|
|
|
994 (if current-prefix-arg 'full)))
|
|
|
995 (let ((fill-individual-varying-indent t))
|
|
|
996 (fill-individual-paragraphs min max justifyp mailp)))
|
|
|
997
|
|
|
998 (defun fill-individual-paragraphs (min max &optional justify mailp)
|
|
|
999 "Fill paragraphs of uniform indentation within the region.
|
|
|
1000 This command divides the region into \"paragraphs\",
|
|
|
1001 treating every change in indentation level as a paragraph boundary,
|
|
|
1002 then fills each paragraph using its indentation level as the fill prefix.
|
|
|
1003
|
|
|
1004 When calling from a program, pass range to fill as first two arguments.
|
|
|
1005
|
|
|
1006 Optional third and fourth arguments JUSTIFY and MAIL-FLAG:
|
|
|
1007 JUSTIFY to justify paragraphs (prefix arg),
|
|
|
1008 MAIL-FLAG for a mail message, i. e. don't fill header lines."
|
|
|
1009 (interactive (list (region-beginning) (region-end)
|
|
|
1010 (if current-prefix-arg 'full)))
|
|
|
1011 (save-restriction
|
|
|
1012 (save-excursion
|
|
|
1013 (goto-char min)
|
|
|
1014 (beginning-of-line)
|
|
|
1015 (narrow-to-region (point) max)
|
|
|
1016 (if mailp
|
|
|
1017 (while (and (not (eobp))
|
|
|
1018 (or (looking-at "[ \t]*[^ \t\n]+:")
|
|
|
1019 (looking-at "[ \t]*$")))
|
|
|
1020 (if (looking-at "[ \t]*[^ \t\n]+:")
|
|
|
1021 (search-forward "\n\n" nil 'move)
|
|
|
1022 (forward-line 1))))
|
|
|
1023 (narrow-to-region (point) max)
|
|
|
1024 ;; Loop over paragraphs.
|
|
|
1025 (while (progn (skip-chars-forward " \t\n") (not (eobp)))
|
|
|
1026 (move-to-left-margin)
|
|
|
1027 (let ((start (point))
|
|
|
1028 fill-prefix fill-prefix-regexp)
|
|
|
1029 ;; Find end of paragraph, and compute the smallest fill-prefix
|
|
|
1030 ;; that fits all the lines in this paragraph.
|
|
|
1031 (while (progn
|
|
|
1032 ;; Update the fill-prefix on the first line
|
|
|
1033 ;; and whenever the prefix good so far is too long.
|
|
|
1034 (if (not (and fill-prefix
|
|
|
1035 (looking-at fill-prefix-regexp)))
|
|
|
1036 (setq fill-prefix
|
|
|
1037 (if (and adaptive-fill-mode adaptive-fill-regexp
|
|
|
1038 (looking-at adaptive-fill-regexp))
|
|
|
1039 (match-string 0)
|
|
|
1040 (buffer-substring
|
|
|
1041 (point)
|
|
|
1042 (save-excursion (skip-chars-forward " \t")
|
|
|
1043 (point))))
|
|
|
1044 fill-prefix-regexp (regexp-quote fill-prefix)))
|
|
|
1045 (forward-line 1)
|
|
|
1046 (if (bolp)
|
|
|
1047 ;; If forward-line went past a newline
|
|
|
1048 ;; move further to the left margin.
|
|
|
1049 (move-to-left-margin))
|
|
|
1050 ;; Now stop the loop if end of paragraph.
|
|
|
1051 (and (not (eobp))
|
|
|
1052 (if fill-individual-varying-indent
|
|
|
1053 ;; If this line is a separator line, with or
|
|
|
1054 ;; without prefix, end the paragraph.
|
|
|
1055 (and
|
|
|
1056 (not (looking-at paragraph-separate))
|
|
|
1057 (save-excursion
|
|
|
1058 (not (and (looking-at fill-prefix-regexp)
|
|
|
1059 ;; XEmacs change
|
|
|
1060 (progn
|
|
|
1061 (forward-char (length fill-prefix))
|
|
|
1062 (looking-at paragraph-separate))))))
|
|
|
1063 ;; If this line has more or less indent
|
|
|
1064 ;; than the fill prefix wants, end the paragraph.
|
|
|
1065 (and (looking-at fill-prefix-regexp)
|
|
|
1066 (save-excursion
|
|
|
1067 (not
|
|
|
1068 (progn
|
|
|
1069 (forward-char (length fill-prefix))
|
|
|
1070 (or (looking-at paragraph-separate)
|
|
|
1071 (looking-at paragraph-start))))))))))
|
|
|
1072 ;; Fill this paragraph, but don't add a newline at the end.
|
|
|
1073 (let ((had-newline (bolp)))
|
|
|
1074 (fill-region-as-paragraph start (point) justify)
|
|
|
1075 (or had-newline (delete-char -1))))))))
|
|
|
1076
|
|
|
1077 ;;; fill.el ends here
|
