replace.el 19.2 KB
Newer Older
Richard M. Stallman's avatar
Richard M. Stallman committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
;; Replace commands for Emacs.
;; Copyright (C) 1985, 1986 Free Software Foundation, Inc.

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 1, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.


Roland McGrath's avatar
Roland McGrath committed
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116
;;;###autoload
(defun query-replace (from-string to-string &optional arg)
  "Replace some occurrences of FROM-STRING with TO-STRING.
As each match is found, the user must type a character saying
what to do with it.  For directions, type \\[help-command] at that time.

Preserves case in each replacement if  case-replace  and  case-fold-search
are non-nil and FROM-STRING has no uppercase letters.
Third arg DELIMITED (prefix arg if interactive) non-nil means replace
only matches surrounded by word boundaries."
  (interactive "sQuery replace: \nsQuery replace %s with: \nP")
  (perform-replace from-string to-string t nil arg)
  (message "Done"))
;;;###autoload (define-key esc-map "%" 'query-replace)

;;;###autoload
(defun query-replace-regexp (regexp to-string &optional arg)
  "Replace some things after point matching REGEXP with TO-STRING.
As each match is found, the user must type a character saying
what to do with it.  For directions, type \\[help-command] at that time.

Preserves case in each replacement if  case-replace  and  case-fold-search
are non-nil and REGEXP has no uppercase letters.
Third arg DELIMITED (prefix arg if interactive) non-nil means replace
only matches surrounded by word boundaries.
In TO-STRING, \\& means insert what matched REGEXP,
and \\=\\<n> means insert what matched <n>th \\(...\\) in REGEXP."
  (interactive "sQuery replace regexp: \nsQuery replace regexp %s with: \nP")
  (perform-replace regexp to-string t t arg)
  (message "Done"))

;;;###autoload
(defun map-query-replace-regexp (regexp to-strings &optional arg)
  "Replace some matches for REGEXP with various strings, in rotation.
The second argument TO-STRINGS contains the replacement strings, separated
by spaces.  This command works like `query-replace-regexp' except
that each successive replacement uses the next successive replacement string,
wrapping around from the last such string to the first.

Non-interactively, TO-STRINGS may be a list of replacement strings.

A prefix argument N says to use each replacement string N times
before rotating to the next."
  (interactive "sMap query replace (regexp): \nsQuery replace %s with (space-separated strings): \nP")
  (let (replacements)
    (if (listp to-strings)
	(setq replacements to-strings)
      (while (/= (length to-strings) 0)
	(if (string-match " " to-strings)
	    (setq replacements
		  (append replacements
			  (list (substring to-strings 0
					   (string-match " " to-strings))))
		  to-strings (substring to-strings
				       (1+ (string-match " " to-strings))))
	  (setq replacements (append replacements (list to-strings))
		to-strings ""))))
    (perform-replace regexp replacements t t nil arg))
  (message "Done"))

;;;###autoload
(defun replace-string (from-string to-string &optional delimited)
  "Replace occurrences of FROM-STRING with TO-STRING.
Preserve case in each match if `case-replace' and `case-fold-search'
are non-nil and FROM-STRING has no uppercase letters.
Third arg DELIMITED (prefix arg if interactive) non-nil means replace
only matches surrounded by word boundaries.

This function is usually the wrong thing to use in a Lisp program.
What you probably want is a loop like this:
  (while (search-forward OLD-STRING nil t)
    (replace-match REPLACEMENT nil t))
which will run faster and will not set the mark or print anything."
  (interactive "sReplace string: \nsReplace string %s with: \nP")
  (perform-replace from-string to-string nil nil delimited)
  (message "Done"))

;;;###autoload
(defun replace-regexp (regexp to-string &optional delimited)
  "Replace things after point matching REGEXP with TO-STRING.
Preserve case in each match if case-replace and case-fold-search
are non-nil and REGEXP has no uppercase letters.
Third arg DELIMITED (prefix arg if interactive) non-nil means replace
only matches surrounded by word boundaries.
In TO-STRING, \\& means insert what matched REGEXP,
and \\=\\<n> means insert what matched <n>th \\(...\\) in REGEXP.

This function is usually the wrong thing to use in a Lisp program.
What you probably want is a loop like this:
  (while (re-search-forward REGEXP nil t)
    (replace-match REPLACEMENT nil nil))
which will run faster and will not set the mark or print anything."
  (interactive "sReplace regexp: \nsReplace regexp %s with: \nP")
  (perform-replace regexp to-string nil t delimited)
  (message "Done"))

Richard M. Stallman's avatar
Richard M. Stallman committed
117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178
(fset 'delete-non-matching-lines 'keep-lines)
(defun keep-lines (regexp)
  "Delete all lines except those containing matches for REGEXP.
A match split across lines preserves all the lines it lies in.
Applies to all lines after point."
  (interactive "sKeep lines (containing match for regexp): ")
  (save-excursion
    (or (bolp) (forward-line 1))
    (let ((start (point)))
      (while (not (eobp))
	;; Start is first char not preserved by previous match.
	(if (not (re-search-forward regexp nil 'move))
	    (delete-region start (point-max))
	  (let ((end (save-excursion (goto-char (match-beginning 0))
				     (beginning-of-line)
				     (point))))
	    ;; Now end is first char preserved by the new match.
	    (if (< start end)
		(delete-region start end))))
	(setq start (save-excursion (forward-line 1)
				    (point)))
	;; If the match was empty, avoid matching again at same place.
	(and (not (eobp)) (= (match-beginning 0) (match-end 0))
	     (forward-char 1))))))

(fset 'delete-matching-lines 'flush-lines)
(defun flush-lines (regexp)
  "Delete lines containing matches for REGEXP.
If a match is split across lines, all the lines it lies in are deleted.
Applies to lines after point."
  (interactive "sFlush lines (containing match for regexp): ")
  (save-excursion
    (while (and (not (eobp))
		(re-search-forward regexp nil t))
      (delete-region (save-excursion (goto-char (match-beginning 0))
				     (beginning-of-line)
				     (point))
		     (progn (forward-line 1) (point))))))

(fset 'count-matches 'how-many)
(defun how-many (regexp)
  "Print number of matches for REGEXP following point."
  (interactive "sHow many matches for (regexp): ")
  (let ((count 0) opoint)
    (save-excursion
     (while (and (not (eobp))
		 (progn (setq opoint (point))
			(re-search-forward regexp nil t)))
       (if (= opoint (point))
	   (forward-char 1)
	 (setq count (1+ count))))
     (message "%d occurrences" count))))

(defvar occur-mode-map ())
(if occur-mode-map
    ()
  (setq occur-mode-map (make-sparse-keymap))
  (define-key occur-mode-map "\C-c\C-c" 'occur-mode-goto-occurrence))

(defvar occur-buffer nil)
(defvar occur-nlines nil)
(defvar occur-pos-list nil)
root's avatar
root committed
179
(defvar occur-last-string "")
Richard M. Stallman's avatar
Richard M. Stallman committed
180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219

(defun occur-mode ()
  "Major mode for output from \\[occur].
Move point to one of the occurrences in this buffer,
then use \\[occur-mode-goto-occurrence] to go to the same occurrence
in the buffer that the occurrences were found in.
\\{occur-mode-map}"
  (kill-all-local-variables)
  (use-local-map occur-mode-map)
  (setq major-mode 'occur-mode)
  (setq mode-name "Occur")
  (make-local-variable 'occur-buffer)
  (make-local-variable 'occur-nlines)
  (make-local-variable 'occur-pos-list))

(defun occur-mode-goto-occurrence ()
  "Go to the line this occurrence was found in, in the buffer it was found in."
  (interactive)
  (if (or (null occur-buffer)
	  (null (buffer-name occur-buffer)))
      (progn
	(setq occur-buffer nil
	      occur-pos-list nil)
	(error "Buffer in which occurrences were found is deleted")))
  (let* ((occur-number (save-excursion
			 (beginning-of-line)
			 (/ (1- (count-lines (point-min)
					     (save-excursion
					       (beginning-of-line)
					       (point))))
			    (cond ((< occur-nlines 0)
				   (- 2 occur-nlines))
				  ((> occur-nlines 0)
				   (+ 2 (* 2 occur-nlines)))
				  (t 1)))))
	 (pos (nth occur-number occur-pos-list)))
    (pop-to-buffer occur-buffer)
    (goto-char (marker-position pos))))

(defvar list-matching-lines-default-context-lines 0
Roland McGrath's avatar
Roland McGrath committed
220
  "*Default number of context lines to include around a `list-matching-lines'
Richard M. Stallman's avatar
Richard M. Stallman committed
221 222 223 224 225 226 227 228 229 230
match.  A negative number means to include that many lines before the match.
A positive number means to include that many lines both before and after.")

(defvar occur-whole-buffer nil
  "If t, occur operates on whole buffer, otherwise occur starts from point.
default is nil.")

(fset 'list-matching-lines 'occur)

(defun occur (regexp &optional nlines)
root's avatar
root committed
231
  "Show lines containing a match for REGEXP.  If the global variable
Roland McGrath's avatar
Roland McGrath committed
232
`occur-whole-buffer' is non-nil, the entire buffer is searched, otherwise
root's avatar
root committed
233
search begins at point.  Interactively, REGEXP defaults to the last REGEXP
Roland McGrath's avatar
Roland McGrath committed
234 235 236
used interactively with \\[occur].

If a match spreads across multiple lines, all those lines are shown.
Richard M. Stallman's avatar
Richard M. Stallman committed
237

Roland McGrath's avatar
Roland McGrath committed
238 239 240
Each line is displayed with NLINES lines before and after, or -NLINES
before if NLINES is negative.
NLINES defaults to `list-matching-lines-default-context-lines'.
Richard M. Stallman's avatar
Richard M. Stallman committed
241 242 243 244 245
Interactively it is the prefix arg.

The lines are shown in a buffer named *Occur*.
It serves as a menu to find any of the occurrences in this buffer.
\\[describe-mode] in that buffer will explain how."
root's avatar
root committed
246 247 248 249
  (interactive (list (setq occur-last-string
			   (read-string "List lines matching regexp: "
					occur-last-string))
		     current-prefix-arg))
Richard M. Stallman's avatar
Richard M. Stallman committed
250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278
  (setq nlines (if nlines (prefix-numeric-value nlines)
		 list-matching-lines-default-context-lines))
  (let ((first t)
	(buffer (current-buffer))
	(linenum 1)
	(prevpos (point-min)))
    (if (not occur-whole-buffer)
	(save-excursion
	  (beginning-of-line)
	  (setq linenum (1+ (count-lines (point-min) (point))))
	  (setq prevpos (point))))
    (with-output-to-temp-buffer "*Occur*"
      (save-excursion
	(set-buffer standard-output)
	(insert "Lines matching ")
	(prin1 regexp)
	(insert " in buffer " (buffer-name buffer) ?. ?\n)
	(occur-mode)
	(setq occur-buffer buffer)
	(setq occur-nlines nlines)
	(setq occur-pos-list ()))
      (if (eq buffer standard-output)
	  (goto-char (point-max)))
      (save-excursion
	(if occur-whole-buffer
	    (beginning-of-buffer))
	;; Find next match, but give up if prev match was at end of buffer.
	(while (and (not (= prevpos (point-max)))
		    (re-search-forward regexp nil t))
Roland McGrath's avatar
Roland McGrath committed
279
	  (goto-char (match-beginning 0))
Richard M. Stallman's avatar
Richard M. Stallman committed
280 281 282
	  (beginning-of-line)
	  (setq linenum (+ linenum (count-lines prevpos (point))))
	  (setq prevpos (point))
Roland McGrath's avatar
Roland McGrath committed
283
	  (goto-char (match-end 0))
Richard M. Stallman's avatar
Richard M. Stallman committed
284
	  (let* ((start (save-excursion
Roland McGrath's avatar
Roland McGrath committed
285
			  (goto-char (match-beginning 0))
Richard M. Stallman's avatar
Richard M. Stallman committed
286 287 288
			  (forward-line (if (< nlines 0) nlines (- nlines)))
			  (point)))
		 (end (save-excursion
Roland McGrath's avatar
Roland McGrath committed
289
			(goto-char (match-end 0))
Richard M. Stallman's avatar
Richard M. Stallman committed
290 291 292 293 294 295 296 297 298 299 300 301 302 303 304
			(if (> nlines 0)
			    (forward-line (1+ nlines))
			    (forward-line 1))
			(point)))
		 (tag (format "%3d" linenum))
		 (empty (make-string (length tag) ?\ ))
		 tem)
	    (save-excursion
	      (set-buffer standard-output)
	      (setq occur-pos-list (cons tem occur-pos-list))
	      (or first (zerop nlines)
		  (insert "--------\n"))
	      (setq first nil)
	      (insert-buffer-substring buffer start end)
	      (backward-char (- end start))
Roland McGrath's avatar
Roland McGrath committed
305
	      (setq tem nlines)
Richard M. Stallman's avatar
Richard M. Stallman committed
306 307 308 309
	      (while (> tem 0)
		(insert empty ?:)
		(forward-line 1)
		(setq tem (1- tem)))
Roland McGrath's avatar
Roland McGrath committed
310 311 312 313 314 315 316 317 318 319 320
	      (let ((final-context-start (make-marker))
		    (this-linenum linenum))
		(set-marker final-context-start
			    (+ (point) (- (match-end 0) (match-beginning 0))))
		(while (< (point) final-context-start)
		  (if (null tag)
		      (setq tag (format "%3d" this-linenum)))
		  (insert tag ?:)
		  (setq tag nil)
		  (forward-line 1)
		  (setq this-linenum (1+ this-linenum))))
Richard M. Stallman's avatar
Richard M. Stallman committed
321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342
	      (while (< tem nlines)
		(insert empty ?:)
		(forward-line 1)
		(setq tem (1+ tem))))				
	    (forward-line 1)))
	(set-buffer standard-output)
	;; Put positions in increasing order to go with buffer.
	(setq occur-pos-list (nreverse occur-pos-list))
	(if (interactive-p)
	    (message "%d matching lines." (length occur-pos-list)))))))

(defconst query-replace-help
  "Type Space or `y' to replace one match, Delete or `n' to skip to next,
ESC or `q' to exit, Period to replace one match and exit,
Comma to replace but not move point immediately,
C-r to enter recursive edit (\\[exit-recursive-edit] to get out again),
C-w to delete match and recursive edit,
C-l to clear the screen, redisplay, and offer same replacement again,
! to replace all remaining matches with no more questions,
^ to move point back to previous match."
  "Help message while in query-replace")

Roland McGrath's avatar
Roland McGrath committed
343
;;;###autoload
Richard M. Stallman's avatar
Richard M. Stallman committed
344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364
(defun perform-replace (from-string replacements
		        query-flag regexp-flag delimited-flag
			&optional repeat-count)
  "Subroutine of `query-replace'.  Its complexity handles interactive queries.
Don't use this in your own program unless you want to query and set the mark
just as `query-replace' does.  Instead, write a simple loop like this:
  (while (re-search-forward \"foo[ \t]+bar\" nil t)
    (replace-match \"foobar\" nil nil))
which will run faster and do exactly what you probably want."
  (let ((nocasify (not (and case-fold-search case-replace
			    (string-equal from-string
					  (downcase from-string)))))
	(literal (not regexp-flag))
	(search-function (if regexp-flag 're-search-forward 'search-forward))
	(search-string from-string)
	(next-replacement nil)
	(replacement-index 0)
	(keep-going t)
	(stack nil)
	(next-rotate-count 0)
	(replace-count 0)
Roland McGrath's avatar
Roland McGrath committed
365 366
	(lastrepl nil)			;Position after last match considered.
	(match-after t))
Richard M. Stallman's avatar
Richard M. Stallman committed
367 368 369 370 371 372 373 374 375 376 377 378 379 380
    (if (stringp replacements)
	(setq next-replacement replacements)
      (or repeat-count (setq repeat-count 1)))
    (if delimited-flag
	(setq search-function 're-search-forward
	      search-string (concat "\\b"
				    (if regexp-flag from-string
				      (regexp-quote from-string))
				    "\\b")))
    (push-mark)
    (undo-boundary)
    (while (and keep-going
		(not (eobp))
		(funcall search-function search-string nil t)
Roland McGrath's avatar
Roland McGrath committed
381 382 383 384 385 386 387 388 389
		;; If the search string matches immediately after
		;; the previous match, but it did not match there
		;; before the replacement was done, ignore the match.
		(if (or (eq lastrepl (point))
			(and regexp-flag
			     (eq lastrepl (match-beginning 0))
			     (not match-again)))
		    (if (eobp)
			nil
Richard M. Stallman's avatar
Richard M. Stallman committed
390 391 392 393 394
		      ;; Don't replace the null string 
		      ;; right after end of previous replacement.
		      (forward-char 1)
		      (funcall search-function search-string nil t))
		  t))
Roland McGrath's avatar
Roland McGrath committed
395 396 397 398
      ;; Before we make the replacement, decide whether the search string
      ;; can match again just after this match.
      (if regexp-flag
	  (setq match-again (looking-at search-string)))
Richard M. Stallman's avatar
Richard M. Stallman committed
399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466
      ;; If time for a change, advance to next replacement string.
      (if (and (listp replacements)
	       (= next-rotate-count replace-count))
	  (progn
	    (setq next-rotate-count
		  (+ next-rotate-count repeat-count))
	    (setq next-replacement (nth replacement-index replacements))
	    (setq replacement-index (% (1+ replacement-index) (length replacements)))))
      (if (not query-flag)
	  (progn
	    (replace-match next-replacement nocasify literal)
	    (setq replace-count (1+ replace-count)))
	(undo-boundary)
	(let (done replaced)
	  (while (not done)
	    ;; Preserve the match data.  Process filters and sentinels
	    ;; could run inside read-char..
	    (let ((data (match-data))
		  (help-form
		   '(concat "Query replacing "
			    (if regexp-flag "regexp " "")
			    from-string " with " next-replacement ".\n\n"
			    (substitute-command-keys query-replace-help))))
	      (setq char help-char)
	      (while (or (not (numberp char)) (= char help-char))
		(message "Query replacing %s with %s: " from-string next-replacement)
		(setq char (read-event))
		(if (and (numberp char) (= char ??))
		    (setq unread-command-char help-char char help-char)))
	      (store-match-data data))
	    (cond ((or (= char ?\e)
		       (= char ?q))
		   (setq keep-going nil)
		   (setq done t))
		  ((= char ?^)
		   (let ((elt (car stack)))
		     (goto-char (car elt))
		     (setq replaced (eq t (cdr elt)))
		     (or replaced
			 (store-match-data (cdr elt)))
		     (setq stack (cdr stack))))		     
		  ((or (= char ?\ )
		       (= char ?y))
		   (or replaced
		       (replace-match next-replacement nocasify literal))
		   (setq done t replaced t))
		  ((= char ?\.)
		   (or replaced
		       (replace-match next-replacement nocasify literal))
		   (setq keep-going nil)
		   (setq done t replaced t))
		  ((= char ?\,)
		   (if (not replaced)
		       (progn
			 (replace-match next-replacement nocasify literal)
			 (setq replaced t))))
		  ((= char ?!)
		   (or replaced
		       (replace-match next-replacement nocasify literal))
		   (setq done t query-flag nil replaced t))
		  ((or (= char ?\177)
		       (= char ?n))
		   (setq done t))
		  ((= char ?\C-l)
		   (recenter nil))
		  ((= char ?\C-r)
		   (store-match-data
		    (prog1 (match-data)
Roland McGrath's avatar
Roland McGrath committed
467 468 469 470 471 472
		      (save-excursion (recursive-edit))))
		   ;; Before we make the replacement,
		   ;; decide whether the search string
		   ;; can match again just after this match.
		   (if regexp-flag
		       (setq match-again (looking-at search-string))))
Richard M. Stallman's avatar
Richard M. Stallman committed
473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502
		  ((= char ?\C-w)
		   (delete-region (match-beginning 0) (match-end 0))
		   (store-match-data
		    (prog1 (match-data)
		      (save-excursion (recursive-edit))))
		   (setq replaced t))
		  (t
		   (setq keep-going nil)
		   (setq unread-command-char char)
		   (setq done t))))
	  ;; Record previous position for ^ when we move on.
	  ;; Change markers to numbers in the match data
	  ;; since lots of markers slow down editing.
	  (setq stack
		(cons (cons (point)
			    (or replaced
				(mapcar
				 (function (lambda (elt)
					     (and elt
						  (marker-position elt))))
				 (match-data))))
		      stack))
	  (if replaced (setq replace-count (1+ replace-count)))))
      (setq lastrepl (point)))
    (and keep-going stack)))

(defun map-query-replace-regexp (regexp to-strings &optional arg)
  "Replace some matches for REGEXP with various strings, in rotation.
The second argument TO-STRINGS contains the replacement strings, separated
by spaces.  This command works like `query-replace-regexp' except
Roland McGrath's avatar
Roland McGrath committed
503 504
that each successive replacement uses the next successive replacement
string, wrapping around from the last such string to the first.
Richard M. Stallman's avatar
Richard M. Stallman committed
505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526

Non-interactively, TO-STRINGS may be a list of replacement strings.

A prefix argument N says to use each replacement string N times
before rotating to the next."
  (interactive "sMap query replace (regexp): \nsQuery replace %s with (space-separated strings): \nP")
  (let (replacements)
    (if (listp to-strings)
	(setq replacements to-strings)
      (while (/= (length to-strings) 0)
	(if (string-match " " to-strings)
	    (setq replacements
		  (append replacements
			  (list (substring to-strings 0
					   (string-match " " to-strings))))
		  to-strings (substring to-strings
				       (1+ (string-match " " to-strings))))
	  (setq replacements (append replacements (list to-strings))
		to-strings ""))))
    (perform-replace regexp replacements t t nil arg))
  (message "Done"))