Mercurial > hg > xemacs-beta
comparison lisp/fill.el @ 209:41ff10fd062f r20-4b3
Import from CVS: tag r20-4b3
| author | cvs |
|---|---|
| date | Mon, 13 Aug 2007 10:04:58 +0200 |
| parents | |
| children | 0e522484dd2a |
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| 208:f427b8ec4379 | 209:41ff10fd062f |
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| 1 ;;; fill.el --- fill commands for XEmacs. | |
| 2 | |
| 3 ;; Copyright (C) 1985, 86, 92, 94, 95, 1997 Free Software Foundation, Inc. | |
| 4 | |
| 5 ;; Maintainer: XEmacs Development Team | |
| 6 ;; Keywords: wp, dumped | |
| 7 | |
| 8 ;; This file is part of XEmacs. | |
| 9 | |
| 10 ;; XEmacs is free software; you can redistribute it and/or modify it | |
| 11 ;; under the terms of the GNU General Public License as published by | |
| 12 ;; the Free Software Foundation; either version 2, or (at your option) | |
| 13 ;; any later version. | |
| 14 | |
| 15 ;; XEmacs is distributed in the hope that it will be useful, but | |
| 16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 18 ;; General Public License for more details. | |
| 19 | |
| 20 ;; You should have received a copy of the GNU General Public License | |
| 21 ;; along with XEmacs; see the file COPYING. If not, write to the Free | |
| 22 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
| 23 ;; 02111-1307, USA. | |
| 24 | |
| 25 ;;; Synched up with: FSF 19.34. | |
| 26 | |
| 27 ;;; Commentary: | |
| 28 | |
| 29 ;; This file is dumped with XEmacs. | |
| 30 | |
| 31 ;; All the commands for filling text. These are documented in the XEmacs | |
| 32 ;; Reference Manual. | |
| 33 | |
| 34 ;; 97/3/14 Jareth Hein (jhod@po.iijnet.or.jp) added functions for kinsoku (asian text | |
| 35 ;; line break processing) | |
| 36 ;; 97/06/11 Steve Baur (steve@altair.xemacs.org) converted broken | |
| 37 ;; following-char/preceding-char calls to char-after/char-before. | |
| 38 | |
| 39 ;;; Code: | |
| 40 | |
| 41 (defconst fill-individual-varying-indent nil | |
| 42 "*Controls criterion for a new paragraph in `fill-individual-paragraphs'. | |
| 43 Non-nil means changing indent doesn't end a paragraph. | |
| 44 That mode can handle paragraphs with extra indentation on the first line, | |
| 45 but it requires separator lines between paragraphs. | |
| 46 A value of nil means that any change in indentation starts a new paragraph.") | |
| 47 | |
| 48 (defconst sentence-end-double-space t | |
| 49 "*Non-nil means a single space does not end a sentence. | |
| 50 This variable applies only to filling, not motion commands. To | |
| 51 change the behavior of motion commands, see `sentence-end'.") | |
| 52 | |
| 53 (defconst colon-double-space nil | |
| 54 "*Non-nil means put two spaces after a colon when filling.") | |
| 55 | |
| 56 (defvar fill-paragraph-function nil | |
| 57 "Mode-specific function to fill a paragraph, or nil if there is none. | |
| 58 If the function returns nil, then `fill-paragraph' does its normal work.") | |
| 59 | |
| 60 (defun set-fill-prefix () | |
| 61 "Set the fill prefix to the current line up to point. | |
| 62 Filling expects lines to start with the fill prefix and | |
| 63 reinserts the fill prefix in each resulting line." | |
| 64 (interactive) | |
| 65 (setq fill-prefix (buffer-substring | |
| 66 (save-excursion (move-to-left-margin) (point)) | |
| 67 (point))) | |
| 68 (if (equal fill-prefix "") | |
| 69 (setq fill-prefix nil)) | |
| 70 (if fill-prefix | |
| 71 (message "fill-prefix: \"%s\"" fill-prefix) | |
| 72 (message "fill-prefix cancelled"))) | |
| 73 | |
| 74 (defconst adaptive-fill-mode t | |
| 75 "*Non-nil means determine a paragraph's fill prefix from its text.") | |
| 76 | |
| 77 ;; #### - this is still weak. Yeah, there's filladapt, but this should | |
| 78 ;; still be better... --Stig | |
| 79 (defconst adaptive-fill-regexp (purecopy "[ \t]*\\([#;>*]+ +\\)?") | |
| 80 "*Regexp to match text at start of line that constitutes indentation. | |
| 81 If Adaptive Fill mode is enabled, whatever text matches this pattern | |
| 82 on the second line of a paragraph is used as the standard indentation | |
| 83 for the paragraph. If the paragraph has just one line, the indentation | |
| 84 is taken from that line.") | |
| 85 | |
| 86 (defvar adaptive-fill-function nil | |
| 87 "*Function to call to choose a fill prefix for a paragraph. | |
| 88 This function is used when `adaptive-fill-regexp' does not match.") | |
| 89 | |
| 90 ;; Added for kinsoku processing. Use this instead of | |
| 91 ;; (skip-chars-backward "^ \t\n") | |
| 92 ;; (skip-chars-backward "^ \n" linebeg) | |
| 93 (defun fill-move-backward-to-break-point (regexp &optional lim) | |
| 94 (let ((opoint (point))) | |
| 95 ;; 93.8.23 by kawamoto@ics.es.osaka-u.ac.jp | |
| 96 ;; case of first 'word' being longer than fill-column | |
| 97 (if (not (re-search-backward regexp lim 'move)) | |
| 98 nil | |
| 99 ;; we have skipped backward SPC or WAN (word-across-newline). So move point forward again. | |
| 100 (forward-char) | |
| 101 (if (< opoint (point)) | |
| 102 (forward-char -1))))) | |
| 103 | |
| 104 ;; Added for kinsoku processing. Use instead of | |
| 105 ;; (re-search-forward "[ \t]" opoint t) | |
| 106 ;; (skip-chars-forward "^ \n") | |
| 107 ;; (skip-chars-forward "^ \n") | |
| 108 (defun fill-move-forward-to-break-point (regexp &optional lim) | |
| 109 (let ((opoint (point))) | |
| 110 (if (not (re-search-forward regexp lim 'move)) | |
| 111 nil | |
| 112 (forward-char -1) | |
| 113 (if (< (point) opoint) | |
| 114 (forward-char)))) | |
| 115 (if (featurep 'mule) (kinsoku-process-extend))) | |
| 116 | |
| 117 (defun fill-end-of-sentence-p () | |
| 118 (save-excursion | |
| 119 (skip-chars-backward " ]})\"'") | |
| 120 (memq (char-before (point)) '(?. ?? ?!)))) | |
| 121 | |
| 122 (defun current-fill-column () | |
| 123 "Return the fill-column to use for this line. | |
| 124 The fill-column to use for a buffer is stored in the variable `fill-column', | |
| 125 but can be locally modified by the `right-margin' text property, which is | |
| 126 subtracted from `fill-column'. | |
| 127 | |
| 128 The fill column to use for a line is the first column at which the column | |
| 129 number equals or exceeds the local fill-column - right-margin difference." | |
| 130 (save-excursion | |
| 131 (if fill-column | |
| 132 (let* ((here (progn (beginning-of-line) (point))) | |
| 133 (here-col 0) | |
| 134 (eol (progn (end-of-line) (point))) | |
| 135 margin fill-col change col) | |
| 136 ;; Look separately at each region of line with a different right-margin. | |
| 137 (while (and (setq margin (get-text-property here 'right-margin) | |
| 138 fill-col (- fill-column (or margin 0)) | |
| 139 change (text-property-not-all | |
| 140 here eol 'right-margin margin)) | |
| 141 (progn (goto-char (1- change)) | |
| 142 (setq col (current-column)) | |
| 143 (< col fill-col))) | |
| 144 (setq here change | |
| 145 here-col col)) | |
| 146 (max here-col fill-col))))) | |
| 147 | |
| 148 (defun canonically-space-region (beg end) | |
| 149 "Remove extra spaces between words in region. | |
| 150 Leave one space between words, two at end of sentences or after colons | |
| 151 \(depending on values of `sentence-end-double-space' and `colon-double-space'). | |
| 152 Remove indentation from each line." | |
| 153 (interactive "r") | |
| 154 ;;;### 97/3/14 jhod: Do I have to add anything here for kinsoku? | |
| 155 (save-excursion | |
| 156 (goto-char beg) | |
| 157 ;; XEmacs - (ENE/stig from fa-extras.el): Skip the start of a comment. | |
| 158 (and comment-start-skip | |
| 159 (looking-at comment-start-skip) | |
| 160 (goto-char (match-end 0))) | |
| 161 ;; Nuke tabs; they get screwed up in a fill. | |
| 162 ;; This is quick, but loses when a tab follows the end of a sentence. | |
| 163 ;; Actually, it is difficult to tell that from "Mr.\tSmith". | |
| 164 ;; Blame the typist. | |
| 165 (subst-char-in-region beg end ?\t ?\ ) | |
| 166 (while (and (< (point) end) | |
| 167 (re-search-forward " *" end t)) | |
| 168 (delete-region | |
| 169 (+ (match-beginning 0) | |
| 170 ;; Determine number of spaces to leave: | |
| 171 (save-excursion | |
| 172 (skip-chars-backward " ]})\"'") | |
| 173 (cond ((and sentence-end-double-space | |
| 174 (memq (char-before (point)) '(?. ?? ?!))) 2) | |
| 175 ((and colon-double-space | |
| 176 (eq (char-before (point)) ?:)) 2) | |
| 177 ((char-equal (char-before (point)) ?\n) 0) | |
| 178 (t 1)))) | |
| 179 (match-end 0))) | |
| 180 ;; Make sure sentences ending at end of line get an extra space. | |
| 181 ;; loses on split abbrevs ("Mr.\nSmith") | |
| 182 (goto-char beg) | |
| 183 (while (and (< (point) end) | |
| 184 (re-search-forward "[.?!][])}\"']*$" end t)) | |
| 185 ;; We insert before markers in case a caller such as | |
| 186 ;; do-auto-fill has done a save-excursion with point at the end | |
| 187 ;; of the line and wants it to stay at the end of the line. | |
| 188 (insert ? )))) | |
| 189 ;; XEmacs: we don't have this function. | |
| 190 ;; (insert-before-markers-and-inherit ? )))) | |
| 191 | |
| 192 ;; XEmacs -- added DONT-SKIP-FIRST. Port of older code changes by Stig. | |
| 193 ;; #### probably this junk is broken -- do-auto-fill doesn't actually use | |
| 194 ;; it. If so, it should be removed. | |
| 195 | |
| 196 (defun fill-context-prefix (from to &optional first-line-regexp | |
| 197 dont-skip-first) | |
| 198 "Compute a fill prefix from the text between FROM and TO. | |
| 199 This uses the variables `adaptive-fill-prefix' and `adaptive-fill-function'. | |
| 200 If FIRST-LINE-REGEXP is non-nil, then when taking a prefix from the | |
| 201 first line, insist it must match FIRST-LINE-REGEXP." | |
| 202 (save-excursion | |
| 203 (goto-char from) | |
| 204 (if (eolp) (forward-line 1)) | |
| 205 ;; Move to the second line unless there is just one. | |
| 206 (let ((firstline (point)) | |
| 207 ;; Non-nil if we are on the second line. | |
| 208 at-second | |
| 209 result) | |
| 210 ;; XEmacs change | |
| 211 (if (not dont-skip-first) | |
| 212 (forward-line 1)) | |
| 213 (if (>= (point) to) | |
| 214 (goto-char firstline) | |
| 215 (setq at-second t)) | |
| 216 (move-to-left-margin) | |
| 217 ;; XEmacs change | |
| 218 (let ((start (point)) | |
| 219 ; jhod: no longer used? | |
| 220 ;(eol (save-excursion (end-of-line) (point))) | |
| 221 ) | |
| 222 (setq result | |
| 223 (if (not (looking-at paragraph-start)) | |
| 224 (cond ((and adaptive-fill-regexp (looking-at adaptive-fill-regexp)) | |
| 225 (buffer-substring-no-properties start (match-end 0))) | |
| 226 (adaptive-fill-function (funcall adaptive-fill-function))))) | |
| 227 (and result | |
| 228 (or at-second | |
| 229 (null first-line-regexp) | |
| 230 (string-match first-line-regexp result)) | |
| 231 result))))) | |
| 232 | |
| 233 ;; XEmacs (stig) - this is pulled out of fill-region-as-paragraph so that it | |
| 234 ;; can also be called from do-auto-fill | |
| 235 ;; #### But it's not used there. Chuck pulled it out because it broke things. | |
| 236 (defun maybe-adapt-fill-prefix (&optional from to dont-skip-first) | |
| 237 (if (and adaptive-fill-mode | |
| 238 (or (null fill-prefix) (string= fill-prefix ""))) | |
| 239 (setq fill-prefix (fill-context-prefix from to nil dont-skip-first)))) | |
| 240 | |
| 241 (defun fill-region-as-paragraph (from to &optional justify | |
| 242 nosqueeze squeeze-after) | |
| 243 "Fill the region as one paragraph. | |
| 244 It removes any paragraph breaks in the region and extra newlines at the end, | |
| 245 indents and fills lines between the margins given by the | |
| 246 `current-left-margin' and `current-fill-column' functions. | |
| 247 It leaves point at the beginning of the line following the paragraph. | |
| 248 | |
| 249 Normally performs justification according to the `current-justification' | |
| 250 function, but with a prefix arg, does full justification instead. | |
| 251 | |
| 252 From a program, optional third arg JUSTIFY can specify any type of | |
| 253 justification. Fourth arg NOSQUEEZE non-nil means not to make spaces | |
| 254 between words canonical before filling. Fifth arg SQUEEZE-AFTER, if non-nil, | |
| 255 means don't canonicalize spaces before that position. | |
| 256 | |
| 257 If `sentence-end-double-space' is non-nil, then period followed by one | |
| 258 space does not end a sentence, so don't break a line there." | |
| 259 (interactive | |
| 260 (progn | |
| 261 ;; XEmacs addition: | |
| 262 (barf-if-buffer-read-only nil (region-beginning) (region-end)) | |
| 263 (list (region-beginning) (region-end) | |
| 264 (if current-prefix-arg 'full)))) | |
| 265 ;; Arrange for undoing the fill to restore point. | |
| 266 (if (and buffer-undo-list (not (eq buffer-undo-list t))) | |
| 267 (setq buffer-undo-list (cons (point) buffer-undo-list))) | |
| 268 | |
| 269 ;; Make sure "to" is the endpoint. | |
| 270 (goto-char (min from to)) | |
| 271 (setq to (max from to)) | |
| 272 ;; Ignore blank lines at beginning of region. | |
| 273 (skip-chars-forward " \t\n") | |
| 274 | |
| 275 (let ((from-plus-indent (point)) | |
| 276 (oneleft nil)) | |
| 277 | |
| 278 (beginning-of-line) | |
| 279 (setq from (point)) | |
| 280 | |
| 281 ;; Delete all but one soft newline at end of region. | |
| 282 ;; And leave TO before that one. | |
| 283 (goto-char to) | |
| 284 (while (and (> (point) from) (eq ?\n (char-after (1- (point))))) | |
| 285 (if (and oneleft | |
| 286 (not (and use-hard-newlines | |
| 287 (get-text-property (1- (point)) 'hard)))) | |
| 288 (delete-backward-char 1) | |
| 289 (backward-char 1) | |
| 290 (setq oneleft t))) | |
| 291 (setq to (point)) | |
| 292 | |
| 293 ;; If there was no newline, and there is text in the paragraph, then | |
| 294 ;; create a newline. | |
| 295 (if (and (not oneleft) (> to from-plus-indent)) | |
| 296 (newline)) | |
| 297 (goto-char from-plus-indent)) | |
| 298 | |
| 299 (if (not (> to (point))) | |
| 300 nil ; There is no paragraph, only whitespace: exit now. | |
| 301 | |
| 302 (or justify (setq justify (current-justification))) | |
| 303 | |
| 304 ;; Don't let Adaptive Fill mode alter the fill prefix permanently. | |
| 305 (let ((fill-prefix fill-prefix)) | |
| 306 ;; Figure out how this paragraph is indented, if desired. | |
| 307 ;; XEmacs: move some code here to a separate function. | |
| 308 (maybe-adapt-fill-prefix from to t) | |
| 309 | |
| 310 (save-restriction | |
| 311 (goto-char from) | |
| 312 (beginning-of-line) | |
| 313 (narrow-to-region (point) to) | |
| 314 | |
| 315 (if (not justify) ; filling disabled: just check indentation | |
| 316 (progn | |
| 317 (goto-char from) | |
| 318 (while (not (eobp)) | |
| 319 (if (and (not (eolp)) | |
| 320 (< (current-indentation) (current-left-margin))) | |
| 321 (indent-to-left-margin)) | |
| 322 (forward-line 1))) | |
| 323 | |
| 324 (if use-hard-newlines | |
| 325 (remove-text-properties from (point-max) '(hard nil))) | |
| 326 ;; Make sure first line is indented (at least) to left margin... | |
| 327 (if (or (memq justify '(right center)) | |
| 328 (< (current-indentation) (current-left-margin))) | |
| 329 (indent-to-left-margin)) | |
| 330 ;; Delete the fill prefix from every line except the first. | |
| 331 ;; The first line may not even have a fill prefix. | |
| 332 (goto-char from) | |
| 333 (let ((fpre (and fill-prefix (not (equal fill-prefix "")) | |
| 334 (concat "[ \t]*" | |
| 335 (regexp-quote fill-prefix) | |
| 336 "[ \t]*")))) | |
| 337 (and fpre | |
| 338 (progn | |
| 339 (if (>= (+ (current-left-margin) (length fill-prefix)) | |
| 340 (current-fill-column)) | |
| 341 (error "fill-prefix too long for specified width")) | |
| 342 (goto-char from) | |
| 343 (forward-line 1) | |
| 344 (while (not (eobp)) | |
| 345 (if (looking-at fpre) | |
| 346 (delete-region (point) (match-end 0))) | |
| 347 (forward-line 1)) | |
| 348 (goto-char from) | |
| 349 (if (looking-at fpre) | |
| 350 (goto-char (match-end 0))) | |
| 351 (setq from (point))))) | |
| 352 ;; Remove indentation from lines other than the first. | |
| 353 (beginning-of-line 2) | |
| 354 (indent-region (point) (point-max) 0) | |
| 355 (goto-char from) | |
| 356 | |
| 357 ;; FROM, and point, are now before the text to fill, | |
| 358 ;; but after any fill prefix on the first line. | |
| 359 | |
| 360 ;; Make sure sentences ending at end of line get an extra space. | |
| 361 ;; loses on split abbrevs ("Mr.\nSmith") | |
| 362 (while (re-search-forward "[.?!][])}\"']*$" nil t) | |
| 363 ;; XEmacs change (no insert-and-inherit) | |
| 364 (or (eobp) (insert ?\ ?\ ))) | |
| 365 (goto-char from) | |
| 366 (skip-chars-forward " \t") | |
| 367 ;; Then change all newlines to spaces. | |
| 368 ;;; 97/3/14 jhod: Kinsoku change | |
| 369 ;; Spacing is not necessary for charcters of no word-separater. | |
| 370 ;; The regexp word-across-newline is used for this check. | |
| 371 (if (not (and (featurep 'mule) | |
| 372 (stringp word-across-newline))) | |
| 373 (subst-char-in-region from (point-max) ?\n ?\ ) | |
| 374 ;; | |
| 375 ;; WAN +NL+WAN --> WAN + WAN | |
| 376 ;; not(WAN)+NL+WAN --> not(WAN) + WAN | |
| 377 ;; WAN +NL+not(WAN) --> WAN + not(WAN) | |
| 378 ;; SPC +NL+not(WAN) --> SPC + not(WAN) | |
| 379 ;; not(WAN)+NL+not(WAN) --> not(WAN) + SPC + not(WAN) | |
| 380 ;; | |
| 381 (goto-char from) | |
| 382 (end-of-line) | |
| 383 (while (not (eobp)) | |
| 384 ;; Insert SPC only when point is between nonWAN. Insert | |
| 385 ;; before deleting to preserve marker if possible. | |
| 386 (if (or (prog2 ; check following char. | |
| 387 (forward-char) ; skip newline | |
| 388 (or (eobp) | |
| 389 (looking-at word-across-newline)) | |
| 390 (forward-char -1)) | |
| 391 (prog2 ; check previous char. | |
| 392 (forward-char -1) | |
| 393 (or (eq (char-after (point)) ?\ ) | |
| 394 (looking-at word-across-newline)) | |
| 395 (forward-char))) | |
| 396 nil | |
| 397 (insert ?\ )) | |
| 398 (delete-char 1) ; delete newline | |
| 399 (end-of-line))) | |
| 400 ;; end patch | |
| 401 (goto-char from) | |
| 402 (skip-chars-forward " \t") | |
| 403 (if (and nosqueeze (not (eq justify 'full))) | |
| 404 nil | |
| 405 (canonically-space-region (or squeeze-after (point)) (point-max)) | |
| 406 (goto-char (point-max)) | |
| 407 (delete-horizontal-space) | |
| 408 ;; XEmacs change (no insert-and-inherit) | |
| 409 (insert " ")) | |
| 410 (goto-char (point-min)) | |
| 411 | |
| 412 ;; This is the actual filling loop. | |
| 413 (let ((prefixcol 0) linebeg | |
| 414 (re-break-point (if (featurep 'mule) | |
| 415 (concat "[ \n\t]\\|" word-across-newline) | |
| 416 "[ \n\t]"))) | |
| 417 (while (not (eobp)) | |
| 418 (setq linebeg (point)) | |
| 419 (move-to-column (1+ (current-fill-column))) | |
| 420 (if (eobp) | |
| 421 (or nosqueeze (delete-horizontal-space)) | |
| 422 ;; Move back to start of word. | |
| 423 ;; 97/3/14 jhod: Kinsoku | |
| 424 ;(skip-chars-backward "^ \n" linebeg) | |
| 425 (fill-move-backward-to-break-point re-break-point linebeg) | |
| 426 ;; end patch | |
| 427 ;; Don't break after a period followed by just one space. | |
| 428 ;; Move back to the previous place to break. | |
| 429 ;; The reason is that if a period ends up at the end of a line, | |
| 430 ;; further fills will assume it ends a sentence. | |
| 431 ;; If we now know it does not end a sentence, | |
| 432 ;; avoid putting it at the end of the line. | |
| 433 (if sentence-end-double-space | |
| 434 (while (and (> (point) (+ linebeg 2)) | |
| 435 (eq (char-before (point)) ?\ ) | |
| 436 (not (eq (char-after (point)) ?\ )) | |
| 437 (eq (char-after (- (point) 2)) ?\.)) | |
| 438 (forward-char -2) | |
| 439 ;; 97/3/14 jhod: Kinsoku | |
| 440 ;(skip-chars-backward "^ \n" linebeg))) | |
| 441 (fill-move-backward-to-break-point re-break-point linebeg))) | |
| 442 (if (featurep 'mule) (kinsoku-process)) | |
| 443 ;end patch | |
| 444 | |
| 445 ;; If the left margin and fill prefix by themselves | |
| 446 ;; pass the fill-column. or if they are zero | |
| 447 ;; but we have no room for even one word, | |
| 448 ;; keep at least one word anyway. | |
| 449 ;; This handles ALL BUT the first line of the paragraph. | |
| 450 (if (if (zerop prefixcol) | |
| 451 (save-excursion | |
| 452 (skip-chars-backward " \t" linebeg) | |
| 453 (bolp)) | |
| 454 (>= prefixcol (current-column))) | |
| 455 ;; Ok, skip at least one word. | |
| 456 ;; Meanwhile, don't stop at a period followed by one space. | |
| 457 (let ((first t)) | |
| 458 (move-to-column prefixcol) | |
| 459 (while (and (not (eobp)) | |
| 460 (or first | |
| 461 (and (not (bobp)) | |
| 462 sentence-end-double-space | |
| 463 (save-excursion (forward-char -1) | |
| 464 (and (looking-at "\\. ") | |
| 465 (not (looking-at "\\. "))))))) | |
| 466 (skip-chars-forward " \t") | |
| 467 ;; 94/3/14 jhod: Kinsoku | |
| 468 ;(skip-chars-forward "^ \n\t") | |
| 469 (fill-move-forward-to-break-point re-break-point) | |
| 470 ;; end patch | |
| 471 (setq first nil))) | |
| 472 ;; Normally, move back over the single space between the words. | |
| 473 (if (eq (char-before (point)) ?\ ) | |
| 474 (forward-char -1))) | |
| 475 ;; If the left margin and fill prefix by themselves | |
| 476 ;; pass the fill-column, keep at least one word. | |
| 477 ;; This handles the first line of the paragraph. | |
| 478 (if (and (zerop prefixcol) | |
| 479 (let ((fill-point (point)) nchars) | |
| 480 (save-excursion | |
| 481 (move-to-left-margin) | |
| 482 (setq nchars (- fill-point (point))) | |
| 483 (or (< nchars 0) | |
| 484 (and fill-prefix | |
| 485 (< nchars (length fill-prefix)) | |
| 486 (string= (buffer-substring (point) fill-point) | |
| 487 (substring fill-prefix 0 nchars))))))) | |
| 488 ;; Ok, skip at least one word. But | |
| 489 ;; don't stop at a period followed by just one space. | |
| 490 (let ((first t)) | |
| 491 (while (and (not (eobp)) | |
| 492 (or first | |
| 493 (and (not (bobp)) | |
| 494 sentence-end-double-space | |
| 495 (save-excursion (forward-char -1) | |
| 496 (and (looking-at "\\. ") | |
| 497 (not (looking-at "\\. "))))))) | |
| 498 (skip-chars-forward " \t") | |
| 499 ;; 97/3/14 jhod: Kinsoku | |
| 500 ;(skip-chars-forward "^ \t\n") | |
| 501 (fill-move-forward-to-break-point re-break-point) | |
| 502 ;; end patch | |
| 503 (setq first nil)))) | |
| 504 ;; Check again to see if we got to the end of the paragraph. | |
| 505 (if (save-excursion (skip-chars-forward " \t") (eobp)) | |
| 506 (or nosqueeze (delete-horizontal-space)) | |
| 507 ;; Replace whitespace here with one newline, then indent to left | |
| 508 ;; margin. | |
| 509 (skip-chars-backward " \t") | |
| 510 ;; 97/3/14 jhod: More kinsoku stuff | |
| 511 (if (featurep 'mule) | |
| 512 ;; WAN means chars which match word-across-newline. | |
| 513 ;; (0) | SPC + SPC* <EOB> --> NL | |
| 514 ;; (1) WAN | SPC + SPC* --> WAN + SPC + NL | |
| 515 ;; (2) | SPC + SPC* + WAN --> SPC + NL + WAN | |
| 516 ;; (3) '.' | SPC + nonSPC --> '.' + SPC + NL + nonSPC | |
| 517 ;; (4) '.' | SPC + SPC --> '.' + NL | |
| 518 ;; (5) | SPC* --> NL | |
| 519 (let ((start (point)) ; 92.6.30 by K.Handa | |
| 520 (ch (char-after (point)))) | |
| 521 (if (and (= ch ? ) | |
| 522 (progn ; not case (0) -- 92.6.30 by K.Handa | |
| 523 (skip-chars-forward " \t") | |
| 524 (not (eobp))) | |
| 525 (or | |
| 526 (progn ; case (1) | |
| 527 (goto-char start) | |
| 528 (forward-char -1) | |
| 529 (looking-at word-across-newline)) | |
| 530 (progn ; case (2) | |
| 531 (goto-char start) | |
| 532 (skip-chars-forward " \t") | |
| 533 (and (not (eobp)) | |
| 534 (looking-at word-across-newline) | |
| 535 ;; never leave space after the end of sentence | |
| 536 (not (fill-end-of-sentence-p)))) | |
| 537 (progn ; case (3) | |
| 538 (goto-char (1+ start)) | |
| 539 (and (not (eobp)) | |
| 540 (not (eq (char-after (point)) ? )) | |
| 541 (fill-end-of-sentence-p))))) | |
| 542 ;; We should keep one SPACE before NEWLINE. (1),(2),(3) | |
| 543 (goto-char (1+ start)) | |
| 544 ;; We should delete all SPACES around break point. (4),(5) | |
| 545 (goto-char start)))) | |
| 546 ;; end of patch | |
| 547 (insert ?\n) | |
| 548 ;; Give newline the properties of the space(s) it replaces | |
| 549 (set-text-properties (1- (point)) (point) | |
| 550 (text-properties-at (point))) | |
| 551 (indent-to-left-margin) | |
| 552 ;; Insert the fill prefix after indentation. | |
| 553 ;; Set prefixcol so whitespace in the prefix won't get lost. | |
| 554 (and fill-prefix (not (equal fill-prefix "")) | |
| 555 (progn | |
| 556 (insert fill-prefix) | |
| 557 (setq prefixcol (current-column)))))) | |
| 558 ;; Justify the line just ended, if desired. | |
| 559 (if justify | |
| 560 (if (save-excursion (skip-chars-forward " \t") (eobp)) | |
| 561 (progn | |
| 562 (delete-horizontal-space) | |
| 563 (justify-current-line justify t t)) | |
| 564 (forward-line -1) | |
| 565 (justify-current-line justify nil t) | |
| 566 (forward-line 1)))))) | |
| 567 ;; Leave point after final newline. | |
| 568 (goto-char (point-max))) | |
| 569 (forward-char 1)))) | |
| 570 | |
| 571 (defun fill-paragraph (arg) | |
| 572 "Fill paragraph at or after point. Prefix arg means justify as well. | |
| 573 If `sentence-end-double-space' is non-nil, then period followed by one | |
| 574 space does not end a sentence, so don't break a line there. | |
| 575 | |
| 576 If `fill-paragraph-function' is non-nil, we call it (passing our | |
| 577 argument to it), and if it returns non-nil, we simply return its value." | |
| 578 (interactive (list (if current-prefix-arg 'full))) | |
| 579 (or (and fill-paragraph-function | |
| 580 (let ((function fill-paragraph-function) | |
| 581 fill-paragraph-function) | |
| 582 (funcall function arg))) | |
| 583 (let ((before (point))) | |
| 584 (save-excursion | |
| 585 (forward-paragraph) | |
| 586 (or (bolp) (newline 1)) | |
| 587 (let ((end (point)) | |
| 588 (beg (progn (backward-paragraph) (point)))) | |
| 589 (goto-char before) | |
| 590 (if use-hard-newlines | |
| 591 ;; Can't use fill-region-as-paragraph, since this paragraph may | |
| 592 ;; still contain hard newlines. See fill-region. | |
| 593 (fill-region beg end arg) | |
| 594 (fill-region-as-paragraph beg end arg))))))) | |
| 595 | |
| 596 (defun fill-region (from to &optional justify nosqueeze to-eop) | |
| 597 "Fill each of the paragraphs in the region. | |
| 598 Prefix arg (non-nil third arg, if called from program) means justify as well. | |
| 599 | |
| 600 Noninteractively, fourth arg NOSQUEEZE non-nil means to leave | |
| 601 whitespace other than line breaks untouched, and fifth arg TO-EOP | |
| 602 non-nil means to keep filling to the end of the paragraph (or next | |
| 603 hard newline, if `use-hard-newlines' is on). | |
| 604 | |
| 605 If `sentence-end-double-space' is non-nil, then period followed by one | |
| 606 space does not end a sentence, so don't break a line there." | |
| 607 (interactive | |
| 608 (progn | |
| 609 ;; XEmacs addition: | |
| 610 (barf-if-buffer-read-only nil (region-beginning) (region-end)) | |
| 611 (list (region-beginning) (region-end) | |
| 612 (if current-prefix-arg 'full)))) | |
| 613 (let (end beg) | |
| 614 (save-restriction | |
| 615 (goto-char (max from to)) | |
| 616 (if to-eop | |
| 617 (progn (skip-chars-backward "\n") | |
| 618 (forward-paragraph))) | |
| 619 (setq end (point)) | |
| 620 (goto-char (setq beg (min from to))) | |
| 621 (beginning-of-line) | |
| 622 (narrow-to-region (point) end) | |
| 623 (while (not (eobp)) | |
| 624 (let ((initial (point)) | |
| 625 end) | |
| 626 ;; If using hard newlines, break at every one for filling | |
| 627 ;; purposes rather than using paragraph breaks. | |
| 628 (if use-hard-newlines | |
| 629 (progn | |
| 630 (while (and (setq end (text-property-any (point) (point-max) | |
| 631 'hard t)) | |
| 632 (not (eq ?\n (char-after end))) | |
| 633 (not (= end (point-max)))) | |
| 634 (goto-char (1+ end))) | |
| 635 (setq end (if end (min (point-max) (1+ end)) (point-max))) | |
| 636 (goto-char initial)) | |
| 637 (forward-paragraph 1) | |
| 638 (setq end (point)) | |
| 639 (forward-paragraph -1)) | |
| 640 (if (< (point) beg) | |
| 641 (goto-char beg)) | |
| 642 (if (>= (point) initial) | |
| 643 (fill-region-as-paragraph (point) end justify nosqueeze) | |
| 644 (goto-char end))))))) | |
| 645 | |
| 646 ;; XEmacs addition: from Tim Bradshaw <tfb@edinburgh.ac.uk> | |
| 647 (defun fill-paragraph-or-region (arg) | |
| 648 "Fill the current region, if it's active; otherwise, fill the paragraph. | |
| 649 See `fill-paragraph' and `fill-region' for more information." | |
| 650 (interactive "*P") | |
| 651 (if (region-active-p) | |
| 652 (fill-region (point) (mark) arg) | |
| 653 (fill-paragraph arg))) | |
| 654 | |
| 655 | |
| 656 (defconst default-justification 'left | |
| 657 "*Method of justifying text not otherwise specified. | |
| 658 Possible values are `left', `right', `full', `center', or `none'. | |
| 659 The requested kind of justification is done whenever lines are filled. | |
| 660 The `justification' text-property can locally override this variable. | |
| 661 This variable automatically becomes buffer-local when set in any fashion.") | |
| 662 (make-variable-buffer-local 'default-justification) | |
| 663 | |
| 664 (defun current-justification () | |
| 665 "How should we justify this line? | |
| 666 This returns the value of the text-property `justification', | |
| 667 or the variable `default-justification' if there is no text-property. | |
| 668 However, it returns nil rather than `none' to mean \"don't justify\"." | |
| 669 (let ((j (or (get-text-property | |
| 670 ;; Make sure we're looking at paragraph body. | |
| 671 (save-excursion (skip-chars-forward " \t") | |
| 672 (if (and (eobp) (not (bobp))) | |
| 673 (1- (point)) (point))) | |
| 674 'justification) | |
| 675 default-justification))) | |
| 676 (if (eq 'none j) | |
| 677 nil | |
| 678 j))) | |
| 679 | |
| 680 (defun set-justification (begin end value &optional whole-par) | |
| 681 "Set the region's justification style. | |
| 682 The kind of justification to use is prompted for. | |
| 683 If the mark is not active, this command operates on the current paragraph. | |
| 684 If the mark is active, the region is used. However, if the beginning and end | |
| 685 of the region are not at paragraph breaks, they are moved to the beginning and | |
| 686 end of the paragraphs they are in. | |
| 687 If `use-hard-newlines' is true, all hard newlines are taken to be paragraph | |
| 688 breaks. | |
| 689 | |
| 690 When calling from a program, operates just on region between BEGIN and END, | |
| 691 unless optional fourth arg WHOLE-PAR is non-nil. In that case bounds are | |
| 692 extended to include entire paragraphs as in the interactive command." | |
| 693 ;; XEmacs change (was mark-active) | |
| 694 (interactive (list (if (region-active-p) (region-beginning) (point)) | |
| 695 (if (region-active-p) (region-end) (point)) | |
| 696 (let ((s (completing-read | |
| 697 "Set justification to: " | |
| 698 '(("left") ("right") ("full") | |
| 699 ("center") ("none")) | |
| 700 nil t))) | |
| 701 (if (equal s "") (error "")) | |
| 702 (intern s)) | |
| 703 t)) | |
| 704 (save-excursion | |
| 705 (save-restriction | |
| 706 (if whole-par | |
| 707 (let ((paragraph-start (if use-hard-newlines "." paragraph-start)) | |
| 708 (paragraph-ignore-fill-prefix (if use-hard-newlines t | |
| 709 paragraph-ignore-fill-prefix))) | |
| 710 (goto-char begin) | |
| 711 (while (and (bolp) (not (eobp))) (forward-char 1)) | |
| 712 (backward-paragraph) | |
| 713 (setq begin (point)) | |
| 714 (goto-char end) | |
| 715 (skip-chars-backward " \t\n" begin) | |
| 716 (forward-paragraph) | |
| 717 (setq end (point)))) | |
| 718 | |
| 719 (narrow-to-region (point-min) end) | |
| 720 (unjustify-region begin (point-max)) | |
| 721 (put-text-property begin (point-max) 'justification value) | |
| 722 (fill-region begin (point-max) nil t)))) | |
| 723 | |
| 724 (defun set-justification-none (b e) | |
| 725 "Disable automatic filling for paragraphs in the region. | |
| 726 If the mark is not active, this applies to the current paragraph." | |
| 727 ;; XEmacs change (was mark-active) | |
| 728 (interactive (list (if (region-active-p) (region-beginning) (point)) | |
| 729 (if (region-active-p) (region-end) (point)))) | |
| 730 (set-justification b e 'none t)) | |
| 731 | |
| 732 (defun set-justification-left (b e) | |
| 733 "Make paragraphs in the region left-justified. | |
| 734 This is usually the default, but see the variable `default-justification'. | |
| 735 If the mark is not active, this applies to the current paragraph." | |
| 736 ;; XEmacs change (was mark-active) | |
| 737 (interactive (list (if (region-active-p) (region-beginning) (point)) | |
| 738 (if (region-active-p) (region-end) (point)))) | |
| 739 (set-justification b e 'left t)) | |
| 740 | |
| 741 (defun set-justification-right (b e) | |
| 742 "Make paragraphs in the region right-justified: | |
| 743 Flush at the right margin and ragged on the left. | |
| 744 If the mark is not active, this applies to the current paragraph." | |
| 745 ;; XEmacs change (was mark-active) | |
| 746 (interactive (list (if (region-active-p) (region-beginning) (point)) | |
| 747 (if (region-active-p) (region-end) (point)))) | |
| 748 (set-justification b e 'right t)) | |
| 749 | |
| 750 (defun set-justification-full (b e) | |
| 751 "Make paragraphs in the region fully justified: | |
| 752 This makes lines flush on both margins by inserting spaces between words. | |
| 753 If the mark is not active, this applies to the current paragraph." | |
| 754 ;; XEmacs change (was mark-active) | |
| 755 (interactive (list (if (region-active-p) (region-beginning) (point)) | |
| 756 (if (region-active-p) (region-end) (point)))) | |
| 757 (set-justification b e 'full t)) | |
| 758 | |
| 759 (defun set-justification-center (b e) | |
| 760 "Make paragraphs in the region centered. | |
| 761 If the mark is not active, this applies to the current paragraph." | |
| 762 ;; XEmacs change (was mark-active) | |
| 763 (interactive (list (if (region-active-p) (region-beginning) (point)) | |
| 764 (if (region-active-p) (region-end) (point)))) | |
| 765 (set-justification b e 'center t)) | |
| 766 | |
| 767 ;; 97/3/14 jhod: This functions are added for Kinsoku support | |
| 768 (defun find-space-insertable-point () | |
| 769 "Search backward for a permissable point for inserting justification spaces" | |
| 770 (if (boundp 'space-insertable) | |
| 771 (if (re-search-backward space-insertable nil t) | |
| 772 (progn (forward-char 1) | |
| 773 t) | |
| 774 nil) | |
| 775 (search-backward " " nil t))) | |
| 776 | |
| 777 ;; A line has up to six parts: | |
| 778 ;; | |
| 779 ;; >>> hello. | |
| 780 ;; [Indent-1][FP][ Indent-2 ][text][trailing whitespace][newline] | |
| 781 ;; | |
| 782 ;; "Indent-1" is the left-margin indentation; normally it ends at column | |
| 783 ;; given by the `current-left-margin' function. | |
| 784 ;; "FP" is the fill-prefix. It can be any string, including whitespace. | |
| 785 ;; "Indent-2" is added to justify a line if the `current-justification' is | |
| 786 ;; `center' or `right'. In `left' and `full' justification regions, any | |
| 787 ;; whitespace there is part of the line's text, and should not be changed. | |
| 788 ;; Trailing whitespace is not counted as part of the line length when | |
| 789 ;; center- or right-justifying. | |
| 790 ;; | |
| 791 ;; All parts of the line are optional, although the final newline can | |
| 792 ;; only be missing on the last line of the buffer. | |
| 793 | |
| 794 (defun justify-current-line (&optional how eop nosqueeze) | |
| 795 "Do some kind of justification on this line. | |
| 796 Normally does full justification: adds spaces to the line to make it end at | |
| 797 the column given by `current-fill-column'. | |
| 798 Optional first argument HOW specifies alternate type of justification: | |
| 799 it can be `left', `right', `full', `center', or `none'. | |
| 800 If HOW is t, will justify however the `current-justification' function says to. | |
| 801 If HOW is nil or missing, full justification is done by default. | |
| 802 Second arg EOP non-nil means that this is the last line of the paragraph, so | |
| 803 it will not be stretched by full justification. | |
| 804 Third arg NOSQUEEZE non-nil means to leave interior whitespace unchanged, | |
| 805 otherwise it is made canonical." | |
| 806 (interactive) | |
| 807 (if (eq t how) (setq how (or (current-justification) 'none)) | |
| 808 (if (null how) (setq how 'full) | |
| 809 (or (memq how '(none left right center)) | |
| 810 (setq how 'full)))) | |
| 811 (or (memq how '(none left)) ; No action required for these. | |
| 812 (let ((fc (current-fill-column)) | |
| 813 (pos (point-marker)) | |
| 814 fp-end ; point at end of fill prefix | |
| 815 beg ; point at beginning of line's text | |
| 816 end ; point at end of line's text | |
| 817 indent ; column of `beg' | |
| 818 endcol ; column of `end' | |
| 819 ncols) ; new indent point or offset | |
| 820 (end-of-line) | |
| 821 ;; Check if this is the last line of the paragraph. | |
| 822 (if (and use-hard-newlines (null eop) | |
| 823 (get-text-property (point) 'hard)) | |
| 824 (setq eop t)) | |
| 825 (skip-chars-backward " \t") | |
| 826 ;; Quick exit if it appears to be properly justified already | |
| 827 ;; or there is no text. | |
| 828 (if (or (bolp) | |
| 829 (and (memq how '(full right)) | |
| 830 (= (current-column) fc))) | |
| 831 nil | |
| 832 (setq end (point)) | |
| 833 (beginning-of-line) | |
| 834 (skip-chars-forward " \t") | |
| 835 ;; Skip over fill-prefix. | |
| 836 (if (and fill-prefix | |
| 837 (not (string-equal fill-prefix "")) | |
| 838 (equal fill-prefix | |
| 839 (buffer-substring | |
| 840 (point) (min (point-max) (+ (length fill-prefix) | |
| 841 (point)))))) | |
| 842 (forward-char (length fill-prefix)) | |
| 843 (if (and adaptive-fill-mode | |
| 844 (looking-at adaptive-fill-regexp)) | |
| 845 (goto-char (match-end 0)))) | |
| 846 (setq fp-end (point)) | |
| 847 (skip-chars-forward " \t") | |
| 848 ;; This is beginning of the line's text. | |
| 849 (setq indent (current-column)) | |
| 850 (setq beg (point)) | |
| 851 (goto-char end) | |
| 852 (setq endcol (current-column)) | |
| 853 | |
| 854 ;; HOW can't be null or left--we would have exited already | |
| 855 (cond ((eq 'right how) | |
| 856 (setq ncols (- fc endcol)) | |
| 857 (if (< ncols 0) | |
| 858 ;; Need to remove some indentation | |
| 859 (delete-region | |
| 860 (progn (goto-char fp-end) | |
| 861 (if (< (current-column) (+ indent ncols)) | |
| 862 (move-to-column (+ indent ncols) t)) | |
| 863 (point)) | |
| 864 (progn (move-to-column indent) (point))) | |
| 865 ;; Need to add some | |
| 866 (goto-char beg) | |
| 867 (indent-to (+ indent ncols)) | |
| 868 ;; If point was at beginning of text, keep it there. | |
| 869 (if (= beg pos) | |
| 870 (move-marker pos (point))))) | |
| 871 | |
| 872 ((eq 'center how) | |
| 873 ;; Figure out how much indentation is needed | |
| 874 (setq ncols (+ (current-left-margin) | |
| 875 (/ (- fc (current-left-margin) ;avail. space | |
| 876 (- endcol indent)) ;text width | |
| 877 2))) | |
| 878 (if (< ncols indent) | |
| 879 ;; Have too much indentation - remove some | |
| 880 (delete-region | |
| 881 (progn (goto-char fp-end) | |
| 882 (if (< (current-column) ncols) | |
| 883 (move-to-column ncols t)) | |
| 884 (point)) | |
| 885 (progn (move-to-column indent) (point))) | |
| 886 ;; Have too little - add some | |
| 887 (goto-char beg) | |
| 888 (indent-to ncols) | |
| 889 ;; If point was at beginning of text, keep it there. | |
| 890 (if (= beg pos) | |
| 891 (move-marker pos (point))))) | |
| 892 | |
| 893 ((eq 'full how) | |
| 894 ;; Insert extra spaces between words to justify line | |
| 895 (save-restriction | |
| 896 (narrow-to-region beg end) | |
| 897 (or nosqueeze | |
| 898 (canonically-space-region beg end)) | |
| 899 (goto-char (point-max)) | |
| 900 (setq ncols (- fc endcol)) | |
| 901 ;; Ncols is number of additional spaces needed | |
| 902 (if (> ncols 0) | |
| 903 (if (and (not eop) | |
| 904 ;; 97/3/14 jhod: Kinsoku | |
| 905 (find-space-insertable-point)) ;(search-backward " " nil t)) | |
| 906 (while (> ncols 0) | |
| 907 (let ((nmove (+ 3 (random 3)))) | |
| 908 (while (> nmove 0) | |
| 909 (or (find-space-insertable-point) ;(search-backward " " nil t) | |
| 910 (progn | |
| 911 (goto-char (point-max)) | |
| 912 (find-space-insertable-point))) ;(search-backward " "))) | |
| 913 (skip-chars-backward " ") | |
| 914 (setq nmove (1- nmove)))) | |
| 915 ;; XEmacs change | |
| 916 (insert " ") | |
| 917 (skip-chars-backward " ") | |
| 918 (setq ncols (1- ncols))))))) | |
| 919 (t (error "Unknown justification value")))) | |
| 920 (goto-char pos) | |
| 921 (move-marker pos nil))) | |
| 922 nil) | |
| 923 | |
| 924 (defun unjustify-current-line () | |
| 925 "Remove justification whitespace from current line. | |
| 926 If the line is centered or right-justified, this function removes any | |
| 927 indentation past the left margin. If the line is full-justified, it removes | |
| 928 extra spaces between words. It does nothing in other justification modes." | |
| 929 (let ((justify (current-justification))) | |
| 930 (cond ((eq 'left justify) nil) | |
| 931 ((eq nil justify) nil) | |
| 932 ((eq 'full justify) ; full justify: remove extra spaces | |
| 933 (beginning-of-line-text) | |
| 934 (canonically-space-region | |
| 935 (point) (save-excursion (end-of-line) (point)))) | |
| 936 ((memq justify '(center right)) | |
| 937 (save-excursion | |
| 938 (move-to-left-margin nil t) | |
| 939 ;; Position ourselves after any fill-prefix. | |
| 940 (if (and fill-prefix | |
| 941 (not (string-equal fill-prefix "")) | |
| 942 (equal fill-prefix | |
| 943 (buffer-substring | |
| 944 (point) (min (point-max) (+ (length fill-prefix) | |
| 945 (point)))))) | |
| 946 (forward-char (length fill-prefix))) | |
| 947 (delete-region (point) (progn (skip-chars-forward " \t") | |
| 948 (point)))))))) | |
| 949 | |
| 950 (defun unjustify-region (&optional begin end) | |
| 951 "Remove justification whitespace from region. | |
| 952 For centered or right-justified regions, this function removes any indentation | |
| 953 past the left margin from each line. For full-justified lines, it removes | |
| 954 extra spaces between words. It does nothing in other justification modes. | |
| 955 Arguments BEGIN and END are optional; default is the whole buffer." | |
| 956 (save-excursion | |
| 957 (save-restriction | |
| 958 (if end (narrow-to-region (point-min) end)) | |
| 959 (goto-char (or begin (point-min))) | |
| 960 (while (not (eobp)) | |
| 961 (unjustify-current-line) | |
| 962 (forward-line 1))))) | |
| 963 | |
| 964 | |
| 965 (defun fill-nonuniform-paragraphs (min max &optional justifyp mailp) | |
| 966 "Fill paragraphs within the region, allowing varying indentation within each. | |
| 967 This command divides the region into \"paragraphs\", | |
| 968 only at paragraph-separator lines, then fills each paragraph | |
| 969 using as the fill prefix the smallest indentation of any line | |
| 970 in the paragraph. | |
| 971 | |
| 972 When calling from a program, pass range to fill as first two arguments. | |
| 973 | |
| 974 Optional third and fourth arguments JUSTIFY and MAIL-FLAG: | |
| 975 JUSTIFY to justify paragraphs (prefix arg), | |
| 976 MAIL-FLAG for a mail message, i. e. don't fill header lines." | |
| 977 (interactive (list (region-beginning) (region-end) | |
| 978 (if current-prefix-arg 'full))) | |
| 979 (let ((fill-individual-varying-indent t)) | |
| 980 (fill-individual-paragraphs min max justifyp mailp))) | |
| 981 | |
| 982 (defun fill-individual-paragraphs (min max &optional justify mailp) | |
| 983 "Fill paragraphs of uniform indentation within the region. | |
| 984 This command divides the region into \"paragraphs\", | |
| 985 treating every change in indentation level as a paragraph boundary, | |
| 986 then fills each paragraph using its indentation level as the fill prefix. | |
| 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 (save-restriction | |
| 996 (save-excursion | |
| 997 (goto-char min) | |
| 998 (beginning-of-line) | |
| 999 (narrow-to-region (point) max) | |
| 1000 (if mailp | |
| 1001 (while (and (not (eobp)) | |
| 1002 (or (looking-at "[ \t]*[^ \t\n]+:") | |
| 1003 (looking-at "[ \t]*$"))) | |
| 1004 (if (looking-at "[ \t]*[^ \t\n]+:") | |
| 1005 (search-forward "\n\n" nil 'move) | |
| 1006 (forward-line 1)))) | |
| 1007 (narrow-to-region (point) max) | |
| 1008 ;; Loop over paragraphs. | |
| 1009 (while (progn (skip-chars-forward " \t\n") (not (eobp))) | |
| 1010 (move-to-left-margin) | |
| 1011 (let ((start (point)) | |
| 1012 fill-prefix fill-prefix-regexp) | |
| 1013 ;; Find end of paragraph, and compute the smallest fill-prefix | |
| 1014 ;; that fits all the lines in this paragraph. | |
| 1015 (while (progn | |
| 1016 ;; Update the fill-prefix on the first line | |
| 1017 ;; and whenever the prefix good so far is too long. | |
| 1018 (if (not (and fill-prefix | |
| 1019 (looking-at fill-prefix-regexp))) | |
| 1020 (setq fill-prefix | |
| 1021 (if (and adaptive-fill-mode adaptive-fill-regexp | |
| 1022 (looking-at adaptive-fill-regexp)) | |
| 1023 (match-string 0) | |
| 1024 (buffer-substring | |
| 1025 (point) | |
| 1026 (save-excursion (skip-chars-forward " \t") | |
| 1027 (point)))) | |
| 1028 fill-prefix-regexp (regexp-quote fill-prefix))) | |
| 1029 (forward-line 1) | |
| 1030 (if (bolp) | |
| 1031 ;; If forward-line went past a newline | |
| 1032 ;; move further to the left margin. | |
| 1033 (move-to-left-margin)) | |
| 1034 ;; Now stop the loop if end of paragraph. | |
| 1035 (and (not (eobp)) | |
| 1036 (if fill-individual-varying-indent | |
| 1037 ;; If this line is a separator line, with or | |
| 1038 ;; without prefix, end the paragraph. | |
| 1039 (and | |
| 1040 (not (looking-at paragraph-separate)) | |
| 1041 (save-excursion | |
| 1042 (not (and (looking-at fill-prefix-regexp) | |
| 1043 ;; XEmacs change | |
| 1044 (progn | |
| 1045 (forward-char (length fill-prefix)) | |
| 1046 (looking-at paragraph-separate)))))) | |
| 1047 ;; If this line has more or less indent | |
| 1048 ;; than the fill prefix wants, end the paragraph. | |
| 1049 (and (looking-at fill-prefix-regexp) | |
| 1050 (save-excursion | |
| 1051 (not | |
| 1052 (progn | |
| 1053 (forward-char (length fill-prefix)) | |
| 1054 (or (looking-at paragraph-separate) | |
| 1055 (looking-at paragraph-start)))))))))) | |
| 1056 ;; Fill this paragraph, but don't add a newline at the end. | |
| 1057 (let ((had-newline (bolp))) | |
| 1058 (fill-region-as-paragraph start (point) justify) | |
| 1059 (or had-newline (delete-char -1)))))))) | |
| 1060 | |
| 1061 ;;; fill.el ends here |