comparison lisp/viper/viper-ex.el @ 0:376386a54a3c r19-14

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date Mon, 13 Aug 2007 08:45:50 +0200
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1 ;;; viper-ex.el --- functions implementing the Ex commands for Viper
2
3 ;; Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
4
5 ;; This file is part of GNU Emacs.
6
7 ;; GNU Emacs is free software; you can redistribute it and/or modify
8 ;; it under the terms of the GNU General Public License as published by
9 ;; the Free Software Foundation; either version 2, or (at your option)
10 ;; any later version.
11
12 ;; GNU Emacs is distributed in the hope that it will be useful,
13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ;; GNU General Public License for more details.
16
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with GNU Emacs; see the file COPYING. If not, write to the
19 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 ;; Boston, MA 02111-1307, USA.
21
22
23 ;; Code
24
25 (require 'viper-util)
26
27 ;; Compiler pacifier
28 (defvar read-file-name-map)
29 ;; end compiler pacifier
30
31 ;;; Variables
32
33 (defconst vip-ex-work-buf-name " *ex-working-space*")
34 (defconst vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
35 (defconst vip-ex-tmp-buf-name " *ex-tmp*")
36
37
38 ;;; Variable completion in :set command
39
40 ;; The list of Ex commands. Used for completing command names.
41 (defconst ex-token-alist
42 '(("!") ("=") (">") ("&") ("~")
43 ("yank") ("xit") ("WWrite") ("Write") ("write") ("wq") ("visual")
44 ("version") ("vglobal") ("unmap") ("undo") ("tag") ("transfer") ("suspend")
45 ("substitute") ("submitReport") ("stop") ("sr") ("source") ("shell")
46 ("set") ("rewind") ("recover") ("read") ("quit") ("pwd")
47 ("put") ("preserve") ("PreviousRelatedFile") ("RelatedFile")
48 ("next") ("Next") ("move") ("mark") ("map") ("kmark") ("join")
49 ("help") ("goto") ("global") ("file") ("edit") ("delete") ("copy")
50 ("chdir") ("cd") ("Buffer") ("buffer") ("args")) )
51
52 ;; A-list of Ex variables that can be set using the :set command.
53 (defconst ex-variable-alist
54 '(("wrapscan") ("ws") ("wrapmargin") ("wm")
55 ("global-tabstop") ("gts") ("tabstop") ("ts")
56 ("showmatch") ("sm") ("shiftwidth") ("sw") ("shell") ("sh")
57 ("readonly") ("ro")
58 ("nowrapscan") ("nows") ("noshowmatch") ("nosm")
59 ("noreadonly") ("noro") ("nomagic") ("noma")
60 ("noignorecase") ("noic")
61 ("global-noautoindent") ("gnoai") ("noautoindent") ("noai")
62 ("magic") ("ma") ("ignorecase") ("ic")
63 ("global-autoindent") ("gai") ("autoindent") ("ai")
64 ))
65
66
67
68 ;; Token recognized during parsing of Ex commands (e.g., "read", "comma")
69 (defvar ex-token nil)
70
71 ;; Type of token.
72 ;; If non-nil, gives type of address; if nil, it is a command.
73 (defvar ex-token-type nil)
74
75 ;; List of addresses passed to Ex command
76 (defvar ex-addresses nil)
77
78 ;; It seems that this flag is used only for `#', `print', and `list', which
79 ;; aren't implemented. Check later.
80 (defvar ex-flag nil)
81
82 ;; "buffer" where Ex commands keep deleted data.
83 ;; In Emacs terms, this is a register.
84 (defvar ex-buffer nil)
85
86 ;; Value of ex count.
87 (defvar ex-count nil)
88
89 ;; Flag for global command.
90 (defvar ex-g-flag nil)
91
92 ;; If t, global command is executed on lines not matching ex-g-pat.
93 (defvar ex-g-variant nil)
94
95 ;; Save reg-exp used in substitute.
96 (defvar ex-reg-exp nil)
97
98
99 ;; Replace pattern for substitute.
100 (defvar ex-repl nil)
101
102 ;; Pattern for global command.
103 (defvar ex-g-pat nil)
104
105
106 (defvar ex-unix-type-shell
107 (let ((case-fold-search t))
108 (and (stringp shell-file-name)
109 (string-match
110 (concat
111 "\\("
112 "csh$\\|csh.exe$"
113 "\\|"
114 "ksh$\\|ksh.exe$"
115 "\\|"
116 "^sh$\\|sh.exe$"
117 "\\|"
118 "[^a-z]sh$\\|[^a-z]sh.exe$"
119 "\\|"
120 "bash$\\|bash.exe$"
121 "\\)")
122 shell-file-name)))
123 "Is the user using a unix-type shell?")
124
125 (defvar ex-unix-type-shell-options
126 (let ((case-fold-search t))
127 (if ex-unix-type-shell
128 (cond ((string-match "\\(csh$\\|csh.exe$\\)" shell-file-name)
129 "-f") ; csh: do it fast
130 ((string-match "\\(bash$\\|bash.exe$\\)" shell-file-name)
131 "-noprofile") ; bash: ignore .profile
132 )))
133 "Options to pass to the Unix-style shell.
134 Don't put `-c' here, as it is added automatically.")
135
136 (defvar ex-nontrivial-find-file-function
137 (cond (ex-unix-type-shell 'vip-ex-nontrivial-find-file-unix)
138 ((eq system-type 'emx) 'vip-ex-nontrivial-find-file-ms) ; OS/2
139 (vip-ms-style-os-p 'vip-ex-nontrivial-find-file-ms) ; a Microsoft OS
140 (vip-vms-os-p 'vip-ex-nontrivial-find-file-unix) ; VMS
141 (t 'vip-ex-nontrivial-find-file-unix) ; presumably UNIX
142 ))
143
144 ;; Remembers the previous Ex tag.
145 (defvar ex-tag nil)
146
147 ;; file used by Ex commands like :r, :w, :n
148 (defvar ex-file nil)
149
150 ;; If t, tells Ex that this is a variant-command, i.e., w>>, r!, etc.
151 (defvar ex-variant nil)
152
153 ;; Specified the offset of an Ex command, such as :read.
154 (defvar ex-offset nil)
155
156 ;; Tells Ex that this is a w>> command.
157 (defvar ex-append nil)
158
159 ;; File containing the shell command to be executed at Ex prompt,
160 ;; e.g., :r !date
161 (defvar ex-cmdfile nil)
162
163 ;; flag used in vip-ex-read-file-name to indicate that we may be reading
164 ;; multiple file names. Used for :edit and :next
165 (defvar vip-keep-reading-filename nil)
166
167 (defconst ex-cycle-other-window t
168 "*If t, :n and :b cycles through files and buffers in other window.
169 Then :N and :B cycles in the current window. If nil, this behavior is
170 reversed.")
171
172 (defconst ex-cycle-through-non-files nil
173 "*Cycle through *scratch* and other buffers that don't visit any file.")
174
175 ;; Last shell command executed with :! command.
176 (defvar vip-ex-last-shell-com nil)
177
178 ;; Indicates if Minibuffer was exited temporarily in Ex-command.
179 (defvar vip-incomplete-ex-cmd nil)
180
181 ;; Remembers the last ex-command prompt.
182 (defvar vip-last-ex-prompt "")
183
184
185 ;;; Code
186
187 ;; Check if ex-token is an initial segment of STR
188 (defun vip-check-sub (str)
189 (let ((length (length ex-token)))
190 (if (and (<= length (length str))
191 (string= ex-token (substring str 0 length)))
192 (setq ex-token str)
193 (setq ex-token-type 'non-command))))
194
195 ;; Get a complete ex command
196 (defun vip-get-ex-com-subr ()
197 (let (case-fold-search)
198 (set-mark (point))
199 (re-search-forward "[a-zA-Z][a-zA-Z]*")
200 (setq ex-token-type 'command)
201 (setq ex-token (buffer-substring (point) (mark t)))
202 (exchange-point-and-mark)
203 (cond ((looking-at "a")
204 (cond ((looking-at "ab") (vip-check-sub "abbreviate"))
205 ((looking-at "ar") (vip-check-sub "args"))
206 (t (vip-check-sub "append"))))
207 ((looking-at "h") (vip-check-sub "help"))
208 ((looking-at "c")
209 (cond ((looking-at "cd") (vip-check-sub "cd"))
210 ((looking-at "ch") (vip-check-sub "chdir"))
211 ((looking-at "co") (vip-check-sub "copy"))
212 (t (vip-check-sub "change"))))
213 ((looking-at "d") (vip-check-sub "delete"))
214 ((looking-at "b") (vip-check-sub "buffer"))
215 ((looking-at "B") (vip-check-sub "Buffer"))
216 ((looking-at "e")
217 (if (looking-at "ex") (vip-check-sub "ex")
218 (vip-check-sub "edit")))
219 ((looking-at "f") (vip-check-sub "file"))
220 ((looking-at "g") (vip-check-sub "global"))
221 ((looking-at "i") (vip-check-sub "insert"))
222 ((looking-at "j") (vip-check-sub "join"))
223 ((looking-at "l") (vip-check-sub "list"))
224 ((looking-at "m")
225 (cond ((looking-at "map") (vip-check-sub "map"))
226 ((looking-at "mar") (vip-check-sub "mark"))
227 (t (vip-check-sub "move"))))
228 ((looking-at "k[a-z][^a-z]")
229 (setq ex-token "kmark")
230 (forward-char 1)
231 (exchange-point-and-mark)) ; this is canceled out by another
232 ; exchange-point-and-mark at the end
233 ((looking-at "k") (vip-check-sub "kmark"))
234 ((looking-at "n") (if (looking-at "nu")
235 (vip-check-sub "number")
236 (vip-check-sub "next")))
237 ((looking-at "N") (vip-check-sub "Next"))
238 ((looking-at "o") (vip-check-sub "open"))
239 ((looking-at "p")
240 (cond ((looking-at "pre") (vip-check-sub "preserve"))
241 ((looking-at "pu") (vip-check-sub "put"))
242 ((looking-at "pw") (vip-check-sub "pwd"))
243 (t (vip-check-sub "print"))))
244 ((looking-at "P") (vip-check-sub "PreviousRelatedFile"))
245 ((looking-at "R") (vip-check-sub "RelatedFile"))
246 ((looking-at "q") (vip-check-sub "quit"))
247 ((looking-at "r")
248 (cond ((looking-at "rec") (vip-check-sub "recover"))
249 ((looking-at "rew") (vip-check-sub "rewind"))
250 (t (vip-check-sub "read"))))
251 ((looking-at "s")
252 (cond ((looking-at "se") (vip-check-sub "set"))
253 ((looking-at "sh") (vip-check-sub "shell"))
254 ((looking-at "so") (vip-check-sub "source"))
255 ((looking-at "sr") (vip-check-sub "sr"))
256 ((looking-at "st") (vip-check-sub "stop"))
257 ((looking-at "sus") (vip-check-sub "suspend"))
258 ((looking-at "subm") (vip-check-sub "submitReport"))
259 (t (vip-check-sub "substitute"))))
260 ((looking-at "t")
261 (if (looking-at "ta") (vip-check-sub "tag")
262 (vip-check-sub "transfer")))
263 ((looking-at "u")
264 (cond ((looking-at "una") (vip-check-sub "unabbreviate"))
265 ((looking-at "unm") (vip-check-sub "unmap"))
266 (t (vip-check-sub "undo"))))
267 ((looking-at "v")
268 (cond ((looking-at "ve") (vip-check-sub "version"))
269 ((looking-at "vi") (vip-check-sub "visual"))
270 (t (vip-check-sub "vglobal"))))
271 ((looking-at "w")
272 (if (looking-at "wq") (vip-check-sub "wq")
273 (vip-check-sub "write")))
274 ((looking-at "W")
275 (if (looking-at "WW")
276 (vip-check-sub "WWrite")
277 (vip-check-sub "Write")))
278 ((looking-at "x") (vip-check-sub "xit"))
279 ((looking-at "y") (vip-check-sub "yank"))
280 ((looking-at "z") (vip-check-sub "z")))
281 (exchange-point-and-mark)
282 ))
283
284 ;; Get an ex-token which is either an address or a command.
285 ;; A token has a type, \(command, address, end-mark\), and a value
286 (defun vip-get-ex-token ()
287 (save-window-excursion
288 (set-buffer vip-ex-work-buf)
289 (skip-chars-forward " \t|")
290 (cond ((looking-at "#")
291 (setq ex-token-type 'command)
292 (setq ex-token (char-to-string (following-char)))
293 (forward-char 1))
294 ((looking-at "[a-z]") (vip-get-ex-com-subr))
295 ((looking-at "\\.")
296 (forward-char 1)
297 (setq ex-token-type 'dot))
298 ((looking-at "[0-9]")
299 (set-mark (point))
300 (re-search-forward "[0-9]*")
301 (setq ex-token-type
302 (cond ((eq ex-token-type 'plus) 'add-number)
303 ((eq ex-token-type 'minus) 'sub-number)
304 (t 'abs-number)))
305 (setq ex-token (string-to-int (buffer-substring (point) (mark t)))))
306 ((looking-at "\\$")
307 (forward-char 1)
308 (setq ex-token-type 'end))
309 ((looking-at "%")
310 (forward-char 1)
311 (setq ex-token-type 'whole))
312 ((looking-at "+")
313 (cond ((or (looking-at "+[-+]") (looking-at "+[\n|]"))
314 (forward-char 1)
315 (insert "1")
316 (backward-char 1)
317 (setq ex-token-type 'plus))
318 ((looking-at "+[0-9]")
319 (forward-char 1)
320 (setq ex-token-type 'plus))
321 (t
322 (error vip-BadAddress))))
323 ((looking-at "-")
324 (cond ((or (looking-at "-[-+]") (looking-at "-[\n|]"))
325 (forward-char 1)
326 (insert "1")
327 (backward-char 1)
328 (setq ex-token-type 'minus))
329 ((looking-at "-[0-9]")
330 (forward-char 1)
331 (setq ex-token-type 'minus))
332 (t
333 (error vip-BadAddress))))
334 ((looking-at "/")
335 (forward-char 1)
336 (set-mark (point))
337 (let ((cont t))
338 (while (and (not (eolp)) cont)
339 ;;(re-search-forward "[^/]*/")
340 (re-search-forward "[^/]*\\(/\\|\n\\)")
341 (if (not (vip-looking-back "[^\\\\]\\(\\\\\\\\\\)*\\\\/"))
342 (setq cont nil))))
343 (backward-char 1)
344 (setq ex-token (buffer-substring (point) (mark t)))
345 (if (looking-at "/") (forward-char 1))
346 (setq ex-token-type 'search-forward))
347 ((looking-at "\\?")
348 (forward-char 1)
349 (set-mark (point))
350 (let ((cont t))
351 (while (and (not (eolp)) cont)
352 ;;(re-search-forward "[^\\?]*\\?")
353 (re-search-forward "[^\\?]*\\(\\?\\|\n\\)")
354 (if (not (vip-looking-back "[^\\\\]\\(\\\\\\\\\\)*\\\\\\?"))
355 (setq cont nil))
356 (backward-char 1)
357 (if (not (looking-at "\n")) (forward-char 1))))
358 (setq ex-token-type 'search-backward)
359 (setq ex-token (buffer-substring (1- (point)) (mark t))))
360 ((looking-at ",")
361 (forward-char 1)
362 (setq ex-token-type 'comma))
363 ((looking-at ";")
364 (forward-char 1)
365 (setq ex-token-type 'semi-colon))
366 ((looking-at "[!=><&~]")
367 (setq ex-token-type 'command)
368 (setq ex-token (char-to-string (following-char)))
369 (forward-char 1))
370 ((looking-at "'")
371 (setq ex-token-type 'goto-mark)
372 (forward-char 1)
373 (cond ((looking-at "'") (setq ex-token nil))
374 ((looking-at "[a-z]") (setq ex-token (following-char)))
375 (t (error "Marks are ' and a-z")))
376 (forward-char 1))
377 ((looking-at "\n")
378 (setq ex-token-type 'end-mark)
379 (setq ex-token "goto"))
380 (t
381 (error vip-BadExCommand)))))
382
383 ;; Reads Ex command. Tries to determine if it has to exit because command
384 ;; is complete or invalid. If not, keeps reading command.
385 (defun ex-cmd-read-exit ()
386 (interactive)
387 (setq vip-incomplete-ex-cmd t)
388 (let ((quit-regex1 (concat
389 "\\(" "set[ \t]*"
390 "\\|" "edit[ \t]*"
391 "\\|" "[nN]ext[ \t]*"
392 "\\|" "unm[ \t]*"
393 "\\|" "^[ \t]*rep"
394 "\\)"))
395 (quit-regex2 (concat
396 "[a-zA-Z][ \t]*"
397 "\\(" "!" "\\|" ">>"
398 "\\|" "\\+[0-9]+"
399 "\\)"
400 "*[ \t]*$"))
401 (stay-regex (concat
402 "\\(" "^[ \t]*$"
403 "\\|" "[?/].*[?/].*"
404 "\\|" "[ktgjmsz][ \t]*$"
405 "\\|" "^[ \t]*ab.*"
406 "\\|" "tr[ansfer \t]*"
407 "\\|" "sr[ \t]*"
408 "\\|" "mo.*"
409 "\\|" "^[ \t]*k?ma[^p]*"
410 "\\|" "^[ \t]*fi.*"
411 "\\|" "v?gl.*"
412 "\\|" "[vg][ \t]*$"
413 "\\|" "jo.*"
414 "\\|" "^[ \t]*ta.*"
415 "\\|" "^[ \t]*una.*"
416 "\\|" "^[ \t]*su.*"
417 "\\|['`][a-z][ \t]*"
418 "\\|" "![ \t]*[a-zA-Z].*"
419 "\\)"
420 "!*")))
421
422 (save-window-excursion ;; put cursor at the end of the Ex working buffer
423 (set-buffer vip-ex-work-buf)
424 (goto-char (point-max)))
425 (cond ((vip-looking-back quit-regex1) (exit-minibuffer))
426 ((vip-looking-back stay-regex) (insert " "))
427 ((vip-looking-back quit-regex2) (exit-minibuffer))
428 (t (insert " ")))))
429
430 ;; complete Ex command
431 (defun ex-cmd-complete ()
432 (interactive)
433 (let (save-pos dist compl-list string-to-complete completion-result)
434
435 (save-excursion
436 (setq dist (skip-chars-backward "[a-zA-Z!=>&~]")
437 save-pos (point)))
438
439 (if (or (= dist 0)
440 (vip-looking-back "\\([ \t]*['`][ \t]*[a-z]*\\)")
441 (vip-looking-back
442 "^[ \t]*[a-zA-Z!=>&~][ \t]*[/?]*+[ \t]+[a-zA-Z!=>&~]+"))
443 ;; Preceding characters are not the ones allowed in an Ex command
444 ;; or we have typed past command name.
445 ;; Note: we didn't do parsing, so there may be surprises.
446 (if (or (vip-looking-back "[a-zA-Z!=>&~][ \t]*[/?]*[ \t]*")
447 (vip-looking-back "\\([ \t]*['`][ \t]*[a-z]*\\)")
448 (looking-at "[^ \t\n\C-m]"))
449 nil
450 (with-output-to-temp-buffer "*Completions*"
451 (display-completion-list
452 (vip-alist-to-list ex-token-alist))))
453 ;; Preceding chars may be part of a command name
454 (setq string-to-complete (buffer-substring save-pos (point)))
455 (setq completion-result
456 (try-completion string-to-complete ex-token-alist))
457
458 (cond ((eq completion-result t) ; exact match--do nothing
459 (vip-tmp-insert-at-eob " (Sole completion)"))
460 ((eq completion-result nil)
461 (vip-tmp-insert-at-eob " (No match)"))
462 (t ;; partial completion
463 (goto-char save-pos)
464 (delete-region (point) (point-max))
465 (insert completion-result)
466 (let (case-fold-search)
467 (setq compl-list
468 (vip-filter-alist (concat "^" completion-result)
469 ex-token-alist)))
470 (if (> (length compl-list) 1)
471 (with-output-to-temp-buffer "*Completions*"
472 (display-completion-list
473 (vip-alist-to-list (reverse compl-list)))))))
474 )))
475
476
477 ;; Read Ex commands
478 ;; Ex commands themselves are implemented in viper-ex.el
479 (defun vip-ex (&optional string)
480 (interactive)
481 (or string
482 (setq ex-g-flag nil
483 ex-g-variant nil))
484 (let* ((map (copy-keymap minibuffer-local-map))
485 (address nil)
486 (cont t)
487 (dot (point))
488 prev-token-type com-str)
489
490 (vip-add-keymap vip-ex-cmd-map map)
491
492 (setq com-str (or string (vip-read-string-with-history
493 ":"
494 nil
495 'vip-ex-history
496 (car vip-ex-history)
497 map)))
498 (save-window-excursion
499 ;; just a precaution
500 (or (vip-buffer-live-p vip-ex-work-buf)
501 (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name)))
502 (set-buffer vip-ex-work-buf)
503 (delete-region (point-min) (point-max))
504 (insert com-str "\n")
505 (goto-char (point-min)))
506 (setq ex-token-type nil
507 ex-addresses nil)
508 (while cont
509 (vip-get-ex-token)
510 (cond ((memq ex-token-type '(command end-mark))
511 (if address (setq ex-addresses (cons address ex-addresses)))
512 (cond ((string= ex-token "global")
513 (ex-global nil)
514 (setq cont nil))
515 ((string= ex-token "vglobal")
516 (ex-global t)
517 (setq cont nil))
518 (t
519 (vip-execute-ex-command)
520 (save-window-excursion
521 (set-buffer vip-ex-work-buf)
522 (skip-chars-forward " \t")
523 (cond ((looking-at "|")
524 (forward-char 1))
525 ((looking-at "\n")
526 (setq cont nil))
527 (t (error "`%s': %s" ex-token vip-SpuriousText)))
528 ))
529 ))
530 ((eq ex-token-type 'non-command)
531 (error "`%s': %s" ex-token vip-BadExCommand))
532 ((eq ex-token-type 'whole)
533 (setq address nil)
534 (setq ex-addresses
535 (if ex-addresses
536 (cons (point-max) ex-addresses)
537 (cons (point-max) (cons (point-min) ex-addresses)))))
538 ((eq ex-token-type 'comma)
539 (if (eq prev-token-type 'whole)
540 (setq address (point-min)))
541 (setq ex-addresses
542 (cons (if (null address) (point) address) ex-addresses)))
543 ((eq ex-token-type 'semi-colon)
544 (if (eq prev-token-type 'whole)
545 (setq address (point-min)))
546 (if address (setq dot address))
547 (setq ex-addresses
548 (cons (if (null address) (point) address) ex-addresses)))
549 (t (let ((ans (vip-get-ex-address-subr address dot)))
550 (if ans (setq address ans)))))
551 (setq prev-token-type ex-token-type))))
552
553
554 ;; Get a regular expression and set `ex-variant', if found
555 (defun vip-get-ex-pat ()
556 (save-window-excursion
557 (set-buffer vip-ex-work-buf)
558 (skip-chars-forward " \t")
559 (if (looking-at "!")
560 (progn
561 (setq ex-g-variant (not ex-g-variant)
562 ex-g-flag (not ex-g-flag))
563 (forward-char 1)
564 (skip-chars-forward " \t")))
565 (let ((c (following-char)))
566 (if (string-match "[0-9A-Za-z]" (format "%c" c))
567 (error
568 "Global regexp must be inside matching non-alphanumeric chars"))
569 (if (looking-at "[^\\\\\n]")
570 (progn
571 (forward-char 1)
572 (set-mark (point))
573 (let ((cont t))
574 (while (and (not (eolp)) cont)
575 (if (not (re-search-forward (format "[^%c]*%c" c c) nil t))
576 (if (member ex-token '("global" "vglobal"))
577 (error
578 "Missing closing delimiter for global regexp")
579 (goto-char (point-max))))
580 (if (not (vip-looking-back
581 (format "[^\\\\]\\(\\\\\\\\\\)*\\\\%c" c)))
582 (setq cont nil))))
583 (setq ex-token
584 (if (= (mark t) (point)) ""
585 (buffer-substring (1- (point)) (mark t))))
586 (backward-char 1))
587 (setq ex-token nil))
588 c)))
589
590 ;; get an ex command
591 (defun vip-get-ex-command ()
592 (save-window-excursion
593 (set-buffer vip-ex-work-buf)
594 (if (looking-at "/") (forward-char 1))
595 (skip-chars-forward " \t")
596 (cond ((looking-at "[a-z]")
597 (vip-get-ex-com-subr)
598 (if (eq ex-token-type 'non-command)
599 (error "`%s': %s" ex-token vip-BadExCommand)))
600 ((looking-at "[!=><&~]")
601 (setq ex-token (char-to-string (following-char)))
602 (forward-char 1))
603 (t (error vip-BadExCommand)))))
604
605 ;; Get an Ex option g or c
606 (defun vip-get-ex-opt-gc (c)
607 (save-window-excursion
608 (set-buffer vip-ex-work-buf)
609 (if (looking-at (format "%c" c)) (forward-char 1))
610 (skip-chars-forward " \t")
611 (cond ((looking-at "g")
612 (setq ex-token "g")
613 (forward-char 1)
614 t)
615 ((looking-at "c")
616 (setq ex-token "c")
617 (forward-char 1)
618 t)
619 (t nil))))
620
621 ;; Compute default addresses. WHOLE-FLAG means use the whole buffer
622 (defun vip-default-ex-addresses (&optional whole-flag)
623 (cond ((null ex-addresses)
624 (setq ex-addresses
625 (if whole-flag
626 (cons (point-max) (cons (point-min) nil))
627 (cons (point) (cons (point) nil)))))
628 ((null (cdr ex-addresses))
629 (setq ex-addresses
630 (cons (car ex-addresses) ex-addresses)))))
631
632 ;; Get an ex-address as a marker and set ex-flag if a flag is found
633 (defun vip-get-ex-address ()
634 (let ((address (point-marker)) (cont t))
635 (setq ex-token "")
636 (setq ex-flag nil)
637 (while cont
638 (vip-get-ex-token)
639 (cond ((eq ex-token-type 'command)
640 (if (member ex-token '("print" "list" "#"))
641 (progn
642 (setq ex-flag t
643 cont nil))
644 (error "Address expected in this Ex command")))
645 ((eq ex-token-type 'end-mark)
646 (setq cont nil))
647 ((eq ex-token-type 'whole)
648 (error "Trailing address expected"))
649 ((eq ex-token-type 'comma)
650 (error "`%s': %s" ex-token vip-SpuriousText))
651 (t (let ((ans (vip-get-ex-address-subr address (point-marker))))
652 (if ans (setq address ans))))))
653 address))
654
655 ;; Returns an address as a point
656 (defun vip-get-ex-address-subr (old-address dot)
657 (let ((address nil))
658 (if (null old-address) (setq old-address dot))
659 (cond ((eq ex-token-type 'dot)
660 (setq address dot))
661 ((eq ex-token-type 'add-number)
662 (save-excursion
663 (goto-char old-address)
664 (forward-line (if (= old-address 0) (1- ex-token) ex-token))
665 (setq address (point-marker))))
666 ((eq ex-token-type 'sub-number)
667 (save-excursion
668 (goto-char old-address)
669 (forward-line (- ex-token))
670 (setq address (point-marker))))
671 ((eq ex-token-type 'abs-number)
672 (save-excursion
673 (goto-char (point-min))
674 (if (= ex-token 0) (setq address 0)
675 (forward-line (1- ex-token))
676 (setq address (point-marker)))))
677 ((eq ex-token-type 'end)
678 (setq address (point-max-marker)))
679 ((eq ex-token-type 'plus) t) ; do nothing
680 ((eq ex-token-type 'minus) t) ; do nothing
681 ((eq ex-token-type 'search-forward)
682 (save-excursion
683 (ex-search-address t)
684 (setq address (point-marker))))
685 ((eq ex-token-type 'search-backward)
686 (save-excursion
687 (ex-search-address nil)
688 (setq address (point-marker))))
689 ((eq ex-token-type 'goto-mark)
690 (save-excursion
691 (if (null ex-token)
692 (exchange-point-and-mark)
693 (goto-char (vip-register-to-point
694 (1+ (- ex-token ?a)) 'enforce-buffer)))
695 (setq address (point-marker)))))
696 address))
697
698
699 ;; Search pattern and set address
700 (defun ex-search-address (forward)
701 (if (string= ex-token "")
702 (if (null vip-s-string)
703 (error vip-NoPrevSearch)
704 (setq ex-token vip-s-string))
705 (setq vip-s-string ex-token))
706 (if forward
707 (progn
708 (forward-line 1)
709 (re-search-forward ex-token))
710 (forward-line -1)
711 (re-search-backward ex-token)))
712
713 ;; Get a buffer name and set `ex-count' and `ex-flag' if found
714 (defun vip-get-ex-buffer ()
715 (setq ex-buffer nil)
716 (setq ex-count nil)
717 (setq ex-flag nil)
718 (save-window-excursion
719 (set-buffer vip-ex-work-buf)
720 (skip-chars-forward " \t")
721 (if (looking-at "[a-zA-Z]")
722 (progn
723 (setq ex-buffer (following-char))
724 (forward-char 1)
725 (skip-chars-forward " \t")))
726 (if (looking-at "[0-9]")
727 (progn
728 (set-mark (point))
729 (re-search-forward "[0-9][0-9]*")
730 (setq ex-count (string-to-int (buffer-substring (point) (mark t))))
731 (skip-chars-forward " \t")))
732 (if (looking-at "[pl#]")
733 (progn
734 (setq ex-flag t)
735 (forward-char 1)))
736 (if (not (looking-at "[\n|]"))
737 (error "`%s': %s" ex-token vip-SpuriousText))))
738
739 (defun vip-get-ex-count ()
740 (setq ex-variant nil
741 ex-count nil
742 ex-flag nil)
743 (save-window-excursion
744 (set-buffer vip-ex-work-buf)
745 (skip-chars-forward " \t")
746 (if (looking-at "!")
747 (progn
748 (setq ex-variant t)
749 (forward-char 1)))
750 (skip-chars-forward " \t")
751 (if (looking-at "[0-9]")
752 (progn
753 (set-mark (point))
754 (re-search-forward "[0-9][0-9]*")
755 (setq ex-count (string-to-int (buffer-substring (point) (mark t))))
756 (skip-chars-forward " \t")))
757 (if (looking-at "[pl#]")
758 (progn
759 (setq ex-flag t)
760 (forward-char 1)))
761 (if (not (looking-at "[\n|]"))
762 (error "`%s': %s"
763 (buffer-substring (point-min) (1- (point-max))) vip-BadExCommand))))
764
765 ;; Expand \% and \# in ex command
766 (defun ex-expand-filsyms (cmd buf)
767 (let (cf pf ret)
768 (save-excursion
769 (set-buffer buf)
770 (setq cf buffer-file-name)
771 (setq pf (ex-next nil t))) ; this finds alternative file name
772 (if (and (null cf) (string-match "[^\\]%\\|\\`%" cmd))
773 (error "No current file to substitute for `%%'"))
774 (if (and (null pf) (string-match "[^\\]#\\|\\`#" cmd))
775 (error "No alternate file to substitute for `#'"))
776 (save-excursion
777 (set-buffer (get-buffer-create vip-ex-tmp-buf-name))
778 (erase-buffer)
779 (insert cmd)
780 (goto-char (point-min))
781 (while (re-search-forward "%\\|#" nil t)
782 (let ((data (match-data))
783 (char (buffer-substring (match-beginning 0) (match-end 0))))
784 (if (vip-looking-back (concat "\\\\" char))
785 (replace-match char)
786 (store-match-data data)
787 (if (string= char "%")
788 (replace-match cf)
789 (replace-match pf)))))
790 (end-of-line)
791 (setq ret (buffer-substring (point-min) (point)))
792 (message "%s" ret))
793 ret))
794
795 ;; Get a file name and set ex-variant, `ex-append' and `ex-offset' if found
796 (defun vip-get-ex-file ()
797 (let (prompt)
798 (setq ex-file nil
799 ex-variant nil
800 ex-append nil
801 ex-offset nil
802 ex-cmdfile nil)
803 (save-excursion
804 (save-window-excursion
805 (set-buffer vip-ex-work-buf)
806 (skip-chars-forward " \t")
807 (if (looking-at "!")
808 (if (and (not (vip-looking-back "[ \t]"))
809 ;; read doesn't have a corresponding :r! form, so ! is
810 ;; immediately interpreted as a shell command.
811 (not (string= ex-token "read")))
812 (progn
813 (setq ex-variant t)
814 (forward-char 1)
815 (skip-chars-forward " \t"))
816 (setq ex-cmdfile t)
817 (forward-char 1)
818 (skip-chars-forward " \t")))
819 (if (looking-at ">>")
820 (progn
821 (setq ex-append t
822 ex-variant t)
823 (forward-char 2)
824 (skip-chars-forward " \t")))
825 (if (looking-at "+")
826 (progn
827 (forward-char 1)
828 (set-mark (point))
829 (re-search-forward "[ \t\n]")
830 (backward-char 1)
831 (setq ex-offset (buffer-substring (point) (mark t)))
832 (forward-char 1)
833 (skip-chars-forward " \t")))
834 ;; this takes care of :r, :w, etc., when they get file names
835 ;; from the history list
836 (if (member ex-token '("read" "write" "edit" "visual" "next"))
837 (progn
838 (setq ex-file (buffer-substring (point) (1- (point-max))))
839 (setq ex-file
840 ;; For :e, match multiple non-white strings separated
841 ;; by white. For others, find the first non-white string
842 (if (string-match
843 (if (string= ex-token "edit")
844 "[^ \t\n]+\\([ \t]+[^ \t\n]+\\)*"
845 "[^ \t\n]+")
846 ex-file)
847 (progn
848 ;; if file name comes from history, don't leave
849 ;; minibuffer when the user types space
850 (setq vip-incomplete-ex-cmd nil)
851 ;; this must be the last clause in this progn
852 (substring ex-file (match-beginning 0) (match-end 0))
853 )
854 ""))
855 ;; this leaves only the command name in the work area
856 ;; file names are gone
857 (delete-region (point) (1- (point-max)))
858 ))
859 (goto-char (point-max))
860 (skip-chars-backward " \t\n")
861 (setq prompt (buffer-substring (point-min) (point)))
862 ))
863
864 (setq vip-last-ex-prompt prompt)
865
866 ;; If we just finished reading command, redisplay prompt
867 (if vip-incomplete-ex-cmd
868 (setq ex-file (vip-ex-read-file-name (format ":%s " prompt)))
869 ;; file was typed in-line
870 (setq ex-file (or ex-file "")))
871 ))
872
873
874 ;; Completes file name or exits minibuffer. If Ex command accepts multiple
875 ;; file names, arranges to re-enter the minibuffer.
876 (defun vip-complete-filename-or-exit ()
877 (interactive)
878 (setq vip-keep-reading-filename t)
879 ;; don't exit if directory---ex-commands don't
880 (cond ((ex-cmd-accepts-multiple-files-p ex-token) (exit-minibuffer))
881 ;; apparently the argument to an Ex command is
882 ;; supposed to be a shell command
883 ((vip-looking-back "^[ \t]*!.*")
884 (setq ex-cmdfile t)
885 (insert " "))
886 (t
887 (setq ex-cmdfile nil)
888 (minibuffer-complete-word))))
889
890 (defun vip-handle-! ()
891 (interactive)
892 (if (and (string=
893 (buffer-string) (vip-abbreviate-file-name default-directory))
894 (member ex-token '("read" "write")))
895 (erase-buffer))
896 (insert "!"))
897
898 (defun ex-cmd-accepts-multiple-files-p (token)
899 (member token '("edit" "next" "Next")))
900
901 ;; If user doesn't enter anything, then "" is returned, i.e., the
902 ;; prompt-directory is not returned.
903 (defun vip-ex-read-file-name (prompt)
904 (let* ((str "")
905 (minibuffer-local-completion-map
906 (copy-keymap minibuffer-local-completion-map))
907 beg end cont val)
908
909 (vip-add-keymap ex-read-filename-map
910 (if vip-emacs-p
911 minibuffer-local-completion-map
912 read-file-name-map))
913
914 (setq cont (setq vip-keep-reading-filename t))
915 (while cont
916 (setq vip-keep-reading-filename nil
917 val (read-file-name (concat prompt str) nil default-directory))
918 (if (string-match " " val)
919 (setq val (concat "\\\"" val "\\\"")))
920 (setq str (concat str (if (equal val "") "" " ")
921 val (if (equal val "") "" " ")))
922
923 ;; Only edit, next, and Next commands accept multiple files.
924 ;; vip-keep-reading-filename is set in the anonymous function that is
925 ;; bound to " " in ex-read-filename-map.
926 (setq cont (and vip-keep-reading-filename
927 (ex-cmd-accepts-multiple-files-p ex-token)))
928 )
929
930 (setq beg (string-match "[^ \t]" str) ; delete leading blanks
931 end (string-match "[ \t]*$" str)) ; delete trailing blanks
932 (if (member ex-token '("read" "write"))
933 (if (string-match "[\t ]*!" str)
934 ;; this is actually a shell command
935 (progn
936 (setq ex-cmdfile t)
937 (setq beg (1+ beg))
938 (setq vip-last-ex-prompt (concat vip-last-ex-prompt " !")))))
939 (substring str (or beg 0) end)))
940
941 ;; Execute ex command using the value of addresses
942 (defun vip-execute-ex-command ()
943 (vip-deactivate-mark)
944 (cond ((string= ex-token "args") (ex-args))
945 ((string= ex-token "copy") (ex-copy nil))
946 ((string= ex-token "cd") (ex-cd))
947 ((string= ex-token "chdir") (ex-cd))
948 ((string= ex-token "delete") (ex-delete))
949 ((string= ex-token "edit") (ex-edit))
950 ((string= ex-token "file") (vip-info-on-file))
951 ((string= ex-token "goto") (ex-goto))
952 ((string= ex-token "help") (ex-help))
953 ((string= ex-token "join") (ex-line "join"))
954 ((string= ex-token "kmark") (ex-mark))
955 ((string= ex-token "mark") (ex-mark))
956 ((string= ex-token "map") (ex-map))
957 ((string= ex-token "move") (ex-copy t))
958 ((string= ex-token "next") (ex-next ex-cycle-other-window))
959 ((string= ex-token "Next") (ex-next (not ex-cycle-other-window)))
960 ((string= ex-token "RelatedFile") (ex-next-related-buffer 1))
961 ((string= ex-token "put") (ex-put))
962 ((string= ex-token "pwd") (ex-pwd))
963 ((string= ex-token "preserve") (ex-preserve))
964 ((string= ex-token "PreviousRelatedFile") (ex-next-related-buffer -1))
965 ((string= ex-token "quit") (ex-quit))
966 ((string= ex-token "read") (ex-read))
967 ((string= ex-token "recover") (ex-recover))
968 ((string= ex-token "rewind") (ex-rewind))
969 ((string= ex-token "submitReport") (vip-submit-report))
970 ((string= ex-token "set") (ex-set))
971 ((string= ex-token "shell") (ex-shell))
972 ((string= ex-token "source") (ex-source))
973 ((string= ex-token "sr") (ex-substitute t t))
974 ((string= ex-token "substitute") (ex-substitute))
975 ((string= ex-token "suspend") (suspend-emacs))
976 ((string= ex-token "stop") (suspend-emacs))
977 ((string= ex-token "transfer") (ex-copy nil))
978 ((string= ex-token "buffer") (if ex-cycle-other-window
979 (vip-switch-to-buffer-other-window)
980 (vip-switch-to-buffer)))
981 ((string= ex-token "Buffer") (if ex-cycle-other-window
982 (vip-switch-to-buffer)
983 (vip-switch-to-buffer-other-window)))
984 ((string= ex-token "tag") (ex-tag))
985 ((string= ex-token "undo") (vip-undo))
986 ((string= ex-token "unmap") (ex-unmap))
987 ((string= ex-token "version") (vip-version))
988 ((string= ex-token "visual") (ex-edit))
989 ((string= ex-token "write") (ex-write nil))
990 ((string= ex-token "Write") (save-some-buffers))
991 ((string= ex-token "wq") (ex-write t))
992 ((string= ex-token "WWrite") (save-some-buffers t)) ; don't ask
993 ((string= ex-token "xit") (ex-write t))
994 ((string= ex-token "yank") (ex-yank))
995 ((string= ex-token "!") (ex-command))
996 ((string= ex-token "=") (ex-line-no))
997 ((string= ex-token ">") (ex-line "right"))
998 ((string= ex-token "<") (ex-line "left"))
999 ((string= ex-token "&") (ex-substitute t))
1000 ((string= ex-token "~") (ex-substitute t t))
1001 ((or (string= ex-token "append")
1002 (string= ex-token "change")
1003 (string= ex-token "insert")
1004 (string= ex-token "open"))
1005 (error "`%s': Obsolete command, not supported by Viper" ex-token))
1006 ((or (string= ex-token "abbreviate")
1007 (string= ex-token "unabbreviate"))
1008 (error
1009 "`%s': Vi abbrevs are obsolete. Use the more powerful Emacs abbrevs"
1010 ex-token))
1011 ((or (string= ex-token "list")
1012 (string= ex-token "print")
1013 (string= ex-token "z")
1014 (string= ex-token "#"))
1015 (error "`%s': Command not implemented in Viper" ex-token))
1016 (t (error "`%s': %s" ex-token vip-BadExCommand))))
1017
1018 (defun vip-undisplayed-files ()
1019 (mapcar
1020 (function
1021 (lambda (b)
1022 (if (null (get-buffer-window b))
1023 (let ((f (buffer-file-name b)))
1024 (if f f
1025 (if ex-cycle-through-non-files
1026 (let ((s (buffer-name b)))
1027 (if (string= " " (substring s 0 1))
1028 nil
1029 s))
1030 nil)))
1031 nil)))
1032 (buffer-list)))
1033
1034
1035 (defun ex-args ()
1036 (let ((l (vip-undisplayed-files))
1037 (args "")
1038 (file-count 1))
1039 (while (not (null l))
1040 (if (car l)
1041 (setq args (format "%s %d) %s\n" args file-count (car l))
1042 file-count (1+ file-count)))
1043 (setq l (cdr l)))
1044 (if (string= args "")
1045 (message "All files are already displayed")
1046 (save-excursion
1047 (save-window-excursion
1048 (with-output-to-temp-buffer " *vip-info*"
1049 (princ "\n\nThese files are not displayed in any window.\n")
1050 (princ "\n=============\n")
1051 (princ args)
1052 (princ "\n=============\n")
1053 (princ "\nThe numbers can be given as counts to :next. ")
1054 (princ "\n\nPress any key to continue...\n\n"))
1055 (vip-read-event))))))
1056
1057 ;; Ex cd command. Default directory of this buffer changes
1058 (defun ex-cd ()
1059 (vip-get-ex-file)
1060 (if (string= ex-file "")
1061 (setq ex-file "~"))
1062 (setq default-directory (file-name-as-directory (expand-file-name ex-file))))
1063
1064 ;; Ex copy and move command. DEL-FLAG means delete
1065 (defun ex-copy (del-flag)
1066 (vip-default-ex-addresses)
1067 (let ((address (vip-get-ex-address))
1068 (end (car ex-addresses)) (beg (car (cdr ex-addresses))))
1069 (goto-char end)
1070 (save-excursion
1071 (push-mark beg t)
1072 (vip-enlarge-region (mark t) (point))
1073 (if del-flag
1074 (kill-region (point) (mark t))
1075 (copy-region-as-kill (point) (mark t)))
1076 (if ex-flag
1077 (progn
1078 (with-output-to-temp-buffer "*copy text*"
1079 (princ
1080 (if (or del-flag ex-g-flag ex-g-variant)
1081 (current-kill 0)
1082 (buffer-substring (point) (mark t)))))
1083 (condition-case nil
1084 (progn
1085 (read-string "[Hit return to continue] ")
1086 (save-excursion (kill-buffer "*copy text*")))
1087 (quit (save-excursion (kill-buffer "*copy text*"))
1088 (signal 'quit nil))))))
1089 (if (= address 0)
1090 (goto-char (point-min))
1091 (goto-char address)
1092 (forward-line 1))
1093 (insert (current-kill 0))))
1094
1095 ;; Ex delete command
1096 (defun ex-delete ()
1097 (vip-default-ex-addresses)
1098 (vip-get-ex-buffer)
1099 (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))))
1100 (if (> beg end) (error vip-FirstAddrExceedsSecond))
1101 (save-excursion
1102 (vip-enlarge-region beg end)
1103 (exchange-point-and-mark)
1104 (if ex-count
1105 (progn
1106 (set-mark (point))
1107 (forward-line (1- ex-count)))
1108 (set-mark end))
1109 (vip-enlarge-region (point) (mark t))
1110 (if ex-flag
1111 ;; show text to be deleted and ask for confirmation
1112 (progn
1113 (with-output-to-temp-buffer " *delete text*"
1114 (princ (buffer-substring (point) (mark t))))
1115 (condition-case nil
1116 (read-string "[Hit return to continue] ")
1117 (quit
1118 (save-excursion (kill-buffer " *delete text*"))
1119 (error "")))
1120 (save-excursion (kill-buffer " *delete text*")))
1121 (if ex-buffer
1122 (cond ((vip-valid-register ex-buffer '(Letter))
1123 (vip-append-to-register
1124 (downcase ex-buffer) (point) (mark t)))
1125 ((vip-valid-register ex-buffer)
1126 (copy-to-register ex-buffer (point) (mark t) nil))
1127 (t (error vip-InvalidRegister ex-buffer))))
1128 (kill-region (point) (mark t))))))
1129
1130
1131
1132 ;; Ex edit command
1133 ;; In Viper, `e' and `e!' behave identically. In both cases, the user is
1134 ;; asked if current buffer should really be discarded.
1135 ;; This command can take multiple file names. It replaces the current buffer
1136 ;; with the first file in its argument list
1137 (defun ex-edit (&optional file)
1138 (if (not file)
1139 (vip-get-ex-file))
1140 (cond ((and (string= ex-file "") buffer-file-name)
1141 (setq ex-file (vip-abbreviate-file-name (buffer-file-name))))
1142 ((string= ex-file "")
1143 (error vip-NoFileSpecified)))
1144
1145 (let (msg do-edit)
1146 (if buffer-file-name
1147 (cond ((buffer-modified-p)
1148 (setq msg
1149 (format "Buffer %s is modified. Discard changes? "
1150 (buffer-name))
1151 do-edit t))
1152 ((not (verify-visited-file-modtime (current-buffer)))
1153 (setq msg
1154 (format "File %s changed on disk. Reread from disk? "
1155 buffer-file-name)
1156 do-edit t))
1157 (t (setq do-edit nil))))
1158
1159 (if do-edit
1160 (if (yes-or-no-p msg)
1161 (progn
1162 (set-buffer-modified-p nil)
1163 (kill-buffer (current-buffer)))
1164 (message "Buffer %s was left intact" (buffer-name))))
1165 ) ; let
1166
1167 (if (null (setq file (get-file-buffer ex-file)))
1168 (progn
1169 (ex-find-file ex-file)
1170 (vip-change-state-to-vi)
1171 (goto-char (point-min)))
1172 (switch-to-buffer file))
1173 (if ex-offset
1174 (progn
1175 (save-window-excursion
1176 (set-buffer vip-ex-work-buf)
1177 (delete-region (point-min) (point-max))
1178 (insert ex-offset "\n")
1179 (goto-char (point-min)))
1180 (goto-char (vip-get-ex-address))
1181 (beginning-of-line)))
1182 (ex-fixup-history vip-last-ex-prompt ex-file))
1183
1184 ;; Splits the string FILESPEC into substrings separated by newlines.
1185 ;; Each line is assumed to be a file name. find-file's each file thus obtained.
1186 (defun ex-find-file (filespec)
1187 (let ((nonstandard-filename-chars "[^a-zA-Z0-9_.-/,\\]"))
1188 (if (string-match nonstandard-filename-chars filespec)
1189 (funcall ex-nontrivial-find-file-function filespec)
1190 (find-file filespec))
1191 ))
1192
1193
1194 ;; Ex global command
1195 (defun ex-global (variant)
1196 (let ((gcommand ex-token))
1197 (if (or ex-g-flag ex-g-variant)
1198 (error "`%s' within `global' is not allowed" gcommand)
1199 (if variant
1200 (setq ex-g-flag nil
1201 ex-g-variant t)
1202 (setq ex-g-flag t
1203 ex-g-variant nil)))
1204 (vip-get-ex-pat)
1205 (if (null ex-token)
1206 (error "`%s': Missing regular expression" gcommand)))
1207
1208 (if (string= ex-token "")
1209 (if (null vip-s-string)
1210 (error vip-NoPrevSearch)
1211 (setq ex-g-pat vip-s-string))
1212 (setq ex-g-pat ex-token
1213 vip-s-string ex-token))
1214 (if (null ex-addresses)
1215 (setq ex-addresses (list (point-max) (point-min)))
1216 (vip-default-ex-addresses))
1217 (let ((marks nil) (mark-count 0)
1218 com-str (end (car ex-addresses)) (beg (car (cdr ex-addresses))))
1219 (if (> beg end) (error vip-FirstAddrExceedsSecond))
1220 (save-excursion
1221 (vip-enlarge-region beg end)
1222 (exchange-point-and-mark)
1223 (let ((cont t) (limit (point-marker)))
1224 (exchange-point-and-mark)
1225 ;; skip the last line if empty
1226 (beginning-of-line)
1227 (if (eobp) (vip-backward-char-carefully))
1228 (while (and cont (not (bobp)) (>= (point) limit))
1229 (beginning-of-line)
1230 (set-mark (point))
1231 (end-of-line)
1232 (let ((found (re-search-backward ex-g-pat (mark t) t)))
1233 (if (or (and ex-g-flag found)
1234 (and ex-g-variant (not found)))
1235 (progn
1236 (end-of-line)
1237 (setq mark-count (1+ mark-count))
1238 (setq marks (cons (point-marker) marks)))))
1239 (beginning-of-line)
1240 (if (bobp) (setq cont nil)
1241 (forward-line -1)
1242 (end-of-line)))))
1243 (save-window-excursion
1244 (set-buffer vip-ex-work-buf)
1245 (setq com-str (buffer-substring (1+ (point)) (1- (point-max)))))
1246 (while marks
1247 (goto-char (car marks))
1248 (vip-ex com-str)
1249 (setq mark-count (1- mark-count))
1250 (setq marks (cdr marks)))))
1251
1252 ;; Ex goto command
1253 (defun ex-goto ()
1254 (if (null ex-addresses)
1255 (setq ex-addresses (cons (point) nil)))
1256 (push-mark (point) t)
1257 (goto-char (car ex-addresses))
1258 (beginning-of-line))
1259
1260 ;; Ex line commands. COM is join, shift-right or shift-left
1261 (defun ex-line (com)
1262 (vip-default-ex-addresses)
1263 (vip-get-ex-count)
1264 (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))) point)
1265 (if (> beg end) (error vip-FirstAddrExceedsSecond))
1266 (save-excursion
1267 (vip-enlarge-region beg end)
1268 (exchange-point-and-mark)
1269 (if ex-count
1270 (progn
1271 (set-mark (point))
1272 (forward-line ex-count)))
1273 (if ex-flag
1274 ;; show text to be joined and ask for confirmation
1275 (progn
1276 (with-output-to-temp-buffer " *text*"
1277 (princ (buffer-substring (point) (mark t))))
1278 (condition-case nil
1279 (progn
1280 (read-string "[Hit return to continue] ")
1281 (ex-line-subr com (point) (mark t)))
1282 (quit (ding)))
1283 (save-excursion (kill-buffer " *text*")))
1284 (ex-line-subr com (point) (mark t)))
1285 (setq point (point)))
1286 (goto-char (1- point))
1287 (beginning-of-line)))
1288
1289 (defun ex-line-subr (com beg end)
1290 (cond ((string= com "join")
1291 (goto-char (min beg end))
1292 (while (and (not (eobp)) (< (point) (max beg end)))
1293 (end-of-line)
1294 (if (and (<= (point) (max beg end)) (not (eobp)))
1295 (progn
1296 (forward-line 1)
1297 (delete-region (point) (1- (point)))
1298 (if (not ex-variant) (fixup-whitespace))))))
1299 ((or (string= com "right") (string= com "left"))
1300 (indent-rigidly
1301 (min beg end) (max beg end)
1302 (if (string= com "right") vip-shift-width (- vip-shift-width)))
1303 (goto-char (max beg end))
1304 (end-of-line)
1305 (vip-forward-char-carefully))))
1306
1307
1308 ;; Ex mark command
1309 (defun ex-mark ()
1310 (let (char)
1311 (if (null ex-addresses)
1312 (setq ex-addresses
1313 (cons (point) nil)))
1314 (save-window-excursion
1315 (set-buffer vip-ex-work-buf)
1316 (skip-chars-forward " \t")
1317 (if (looking-at "[a-z]")
1318 (progn
1319 (setq char (following-char))
1320 (forward-char 1)
1321 (skip-chars-forward " \t")
1322 (if (not (looking-at "[\n|]"))
1323 (error "`%s': %s" ex-token vip-SpuriousText)))
1324 (error "`%s' requires a following letter" ex-token)))
1325 (save-excursion
1326 (goto-char (car ex-addresses))
1327 (point-to-register (1+ (- char ?a))))))
1328
1329
1330
1331 ;; Alternate file is the file next to the first one in the buffer ring
1332 (defun ex-next (cycle-other-window &optional find-alt-file)
1333 (catch 'ex-edit
1334 (let (count l)
1335 (if (not find-alt-file)
1336 (progn
1337 (vip-get-ex-file)
1338 (if (or (char-or-string-p ex-offset)
1339 (and (not (string= "" ex-file))
1340 (not (string-match "^[0-9]+$" ex-file))))
1341 (progn
1342 (ex-edit t)
1343 (throw 'ex-edit nil))
1344 (setq count (string-to-int ex-file))
1345 (if (= count 0) (setq count 1))
1346 (if (< count 0) (error "Usage: `next <count>' (count >= 0)"))))
1347 (setq count 1))
1348 (setq l (vip-undisplayed-files))
1349 (while (> count 0)
1350 (while (and (not (null l)) (null (car l)))
1351 (setq l (cdr l)))
1352 (setq count (1- count))
1353 (if (> count 0)
1354 (setq l (cdr l))))
1355 (if find-alt-file (car l)
1356 (progn
1357 (if (and (car l) (get-file-buffer (car l)))
1358 (let* ((w (if cycle-other-window
1359 (get-lru-window) (selected-window)))
1360 (b (window-buffer w)))
1361 (set-window-buffer w (get-file-buffer (car l)))
1362 (bury-buffer b)
1363 ;; this puts "next <count>" in the ex-command history
1364 (ex-fixup-history vip-last-ex-prompt ex-file))
1365 (error "Not that many undisplayed files")))))))
1366
1367
1368 (defun ex-next-related-buffer (direction &optional no-recursion)
1369
1370 (vip-ring-rotate1 vip-related-files-and-buffers-ring direction)
1371
1372 (let ((file-or-buffer-name
1373 (vip-current-ring-item vip-related-files-and-buffers-ring))
1374 (old-ring vip-related-files-and-buffers-ring)
1375 (old-win (selected-window))
1376 skip-rest buf wind)
1377
1378 (or (and (ring-p vip-related-files-and-buffers-ring)
1379 (> (ring-length vip-related-files-and-buffers-ring) 0))
1380 (error "This buffer has no related files or buffers"))
1381
1382 (or (stringp file-or-buffer-name)
1383 (error
1384 "File and buffer names must be strings, %S" file-or-buffer-name))
1385
1386 (setq buf (cond ((get-buffer file-or-buffer-name))
1387 ((file-exists-p file-or-buffer-name)
1388 (find-file-noselect file-or-buffer-name))
1389 ))
1390
1391 (if (not (vip-buffer-live-p buf))
1392 (error "Didn't find buffer %S or file %S"
1393 file-or-buffer-name
1394 (vip-abbreviate-file-name
1395 (expand-file-name file-or-buffer-name))))
1396
1397 (if (equal buf (current-buffer))
1398 (or no-recursion
1399 ;; try again
1400 (progn
1401 (setq skip-rest t)
1402 (ex-next-related-buffer direction 'norecursion))))
1403
1404 (if skip-rest
1405 ()
1406 ;; setup buffer
1407 (if (setq wind (vip-get-visible-buffer-window buf))
1408 ()
1409 (setq wind (get-lru-window (if vip-xemacs-p nil 'visible)))
1410 (set-window-buffer wind buf))
1411
1412 (if (vip-window-display-p)
1413 (progn
1414 (raise-frame (window-frame wind))
1415 (if (equal (window-frame wind) (window-frame old-win))
1416 (save-window-excursion (select-window wind) (sit-for 1))
1417 (select-window wind)))
1418 (save-window-excursion (select-window wind) (sit-for 1)))
1419
1420 (save-excursion
1421 (set-buffer buf)
1422 (setq vip-related-files-and-buffers-ring old-ring))
1423
1424 (setq vip-local-search-start-marker (point-marker))
1425 )))
1426
1427
1428 ;; Force auto save
1429 (defun ex-preserve ()
1430 (message "Autosaving all buffers that need to be saved...")
1431 (do-auto-save t))
1432
1433 ;; Ex put
1434 (defun ex-put ()
1435 (let ((point (if (null ex-addresses) (point) (car ex-addresses))))
1436 (vip-get-ex-buffer)
1437 (setq vip-use-register ex-buffer)
1438 (goto-char point)
1439 (if (bobp) (vip-Put-back 1) (vip-put-back 1))))
1440
1441 ;; Ex print working directory
1442 (defun ex-pwd ()
1443 (message default-directory))
1444
1445 ;; Ex quit command
1446 (defun ex-quit ()
1447 ;; skip "!", if it is q!. In Viper q!, w!, etc., behave as q, w, etc.
1448 (save-excursion
1449 (set-buffer vip-ex-work-buf)
1450 (if (looking-at "!") (forward-char 1)))
1451 (if (< vip-expert-level 3)
1452 (save-buffers-kill-emacs)
1453 (kill-buffer (current-buffer))))
1454
1455
1456 ;; Ex read command
1457 (defun ex-read ()
1458 (vip-get-ex-file)
1459 (let ((point (if (null ex-addresses) (point) (car ex-addresses)))
1460 command)
1461 (goto-char point)
1462 (vip-add-newline-at-eob-if-necessary)
1463 (if (not (or (bobp) (eobp))) (forward-line 1))
1464 (if (and (not ex-variant) (string= ex-file ""))
1465 (progn
1466 (if (null buffer-file-name)
1467 (error vip-NoFileSpecified))
1468 (setq ex-file buffer-file-name)))
1469 (if ex-cmdfile
1470 (progn
1471 (setq command (ex-expand-filsyms ex-file (current-buffer)))
1472 (shell-command command t))
1473 (insert-file-contents ex-file)))
1474 (ex-fixup-history vip-last-ex-prompt ex-file))
1475
1476 ;; this function fixes ex-history for some commands like ex-read, ex-edit
1477 (defun ex-fixup-history (&rest args)
1478 (setq vip-ex-history
1479 (cons (mapconcat 'identity args " ") (cdr vip-ex-history))))
1480
1481
1482 ;; Ex recover from emacs \#file\#
1483 (defun ex-recover ()
1484 (vip-get-ex-file)
1485 (if (or ex-append ex-offset)
1486 (error "`recover': %s" vip-SpuriousText))
1487 (if (string= ex-file "")
1488 (progn
1489 (if (null buffer-file-name)
1490 (error "This buffer isn't visiting any file"))
1491 (setq ex-file buffer-file-name))
1492 (setq ex-file (expand-file-name ex-file)))
1493 (if (and (not (string= ex-file (buffer-file-name)))
1494 (buffer-modified-p)
1495 (not ex-variant))
1496 (error "No write since last change \(:rec! overrides\)"))
1497 (recover-file ex-file))
1498
1499 ;; Tell that `rewind' is obsolete and to use `:next count' instead
1500 (defun ex-rewind ()
1501 (message
1502 "Use `:n <count>' instead. Counts are obtained from the `:args' command"))
1503
1504
1505 ;; read variable name for ex-set
1506 (defun ex-set-read-variable ()
1507 (let ((minibuffer-local-completion-map
1508 (copy-keymap minibuffer-local-completion-map))
1509 (cursor-in-echo-area t)
1510 str batch)
1511 (define-key
1512 minibuffer-local-completion-map " " 'minibuffer-complete-and-exit)
1513 (define-key minibuffer-local-completion-map "=" 'exit-minibuffer)
1514 (if (vip-set-unread-command-events
1515 (ex-get-inline-cmd-args "[ \t]*[a-zA-Z]*[ \t]*" nil "\C-m"))
1516 (progn
1517 (setq batch t)
1518 (vip-set-unread-command-events ?\C-m)))
1519 (message ":set <Variable> [= <Value>]")
1520 (or batch (sit-for 2))
1521
1522 (while (string-match "^[ \\t\\n]*$"
1523 (setq str
1524 (completing-read ":set " ex-variable-alist)))
1525 (message ":set <Variable> ")
1526 ;; if there are unread events, don't wait
1527 (or (vip-set-unread-command-events "") (sit-for 2))
1528 ) ; while
1529 str))
1530
1531
1532 (defun ex-set ()
1533 (let ((var (ex-set-read-variable))
1534 (val 0)
1535 (set-cmd "setq")
1536 (ask-if-save t)
1537 (auto-cmd-label "; don't touch or else...")
1538 (delete-turn-on-auto-fill-pattern
1539 "([ \t]*add-hook[ \t]+'vip-insert-state-hooks[ \t]+'turn-on-auto-fill.*)")
1540 actual-lisp-cmd lisp-cmd-del-pattern
1541 val2 orig-var)
1542 (setq orig-var var)
1543 (cond ((member var '("ai" "autoindent"))
1544 (setq var "vip-auto-indent"
1545 set-cmd "setq"
1546 ask-if-save nil
1547 val "t"))
1548 ((member var '("gai" "global-autoindent"))
1549 (kill-local-variable 'vip-auto-indent)
1550 (setq var "vip-auto-indent"
1551 set-cmd "setq-default"
1552 val "t"))
1553 ((member var '("noai" "noautoindent"))
1554 (setq var "vip-auto-indent"
1555 ask-if-save nil
1556 val "nil"))
1557 ((member var '("gnoai" "global-noautoindent"))
1558 (kill-local-variable 'vip-auto-indent)
1559 (setq var "vip-auto-indent"
1560 set-cmd "setq-default"
1561 val "nil"))
1562 ((member var '("ic" "ignorecase"))
1563 (setq var "vip-case-fold-search"
1564 val "t"))
1565 ((member var '("noic" "noignorecase"))
1566 (setq var "vip-case-fold-search"
1567 val "nil"))
1568 ((member var '("ma" "magic"))
1569 (setq var "vip-re-search"
1570 val "t"))
1571 ((member var '("noma" "nomagic"))
1572 (setq var "vip-re-search"
1573 val "nil"))
1574 ((member var '("ro" "readonly"))
1575 (setq var "buffer-read-only"
1576 val "t"))
1577 ((member var '("noro" "noreadonly"))
1578 (setq var "buffer-read-only"
1579 val "nil"))
1580 ((member var '("sm" "showmatch"))
1581 (setq var "blink-matching-paren"
1582 val "t"))
1583 ((member var '("nosm" "noshowmatch"))
1584 (setq var "blink-matching-paren"
1585 val "nil"))
1586 ((member var '("ws" "wrapscan"))
1587 (setq var "vip-search-wrap-around-t"
1588 val "t"))
1589 ((member var '("nows" "nowrapscan"))
1590 (setq var "vip-search-wrap-around-t"
1591 val "nil")))
1592 (if (eq val 0) ; value must be set by the user
1593 (let ((cursor-in-echo-area t))
1594 (message ":set %s = <Value>" var)
1595 ;; if there are unread events, don't wait
1596 (or (vip-set-unread-command-events "") (sit-for 2))
1597 (setq val (read-string (format ":set %s = " var)))
1598 (ex-fixup-history "set" orig-var val)
1599
1600 ;; check numerical values
1601 (if (member var
1602 '("sw" "shiftwidth"
1603 "ts" "tabstop"
1604 "gts" "global-tabstop"
1605 "wm" "wrapmargin"))
1606 (condition-case nil
1607 (or (numberp (setq val2 (car (read-from-string val))))
1608 (error "%s: Invalid value, numberp, %S" var val))
1609 (error
1610 (error "%s: Invalid value, numberp, %S" var val))))
1611
1612 (cond
1613 ((member var '("sw" "shiftwidth"))
1614 (setq var "vip-shift-width"))
1615 ((member var '("ts" "tabstop"))
1616 ;; make it take effect in curr buff and new bufs
1617 (setq var "tab-width"
1618 set-cmd "setq"
1619 ask-if-save nil))
1620 ((member var '("gts" "global-tabstop"))
1621 (kill-local-variable 'tab-width)
1622 (setq var "tab-width"
1623 set-cmd "setq-default"))
1624 ((member var '("wm" "wrapmargin"))
1625 ;; make it take effect in curr buff and new bufs
1626 (kill-local-variable 'fill-column)
1627 (setq var "fill-column"
1628 val (format "(- (window-width) %s)" val)
1629 set-cmd "setq-default"))
1630 ((member var '("sh" "shell"))
1631 (setq var "explicit-shell-file-name"
1632 val (format "\"%s\"" val)))))
1633 (ex-fixup-history "set" orig-var))
1634
1635 (setq actual-lisp-cmd (format "\n(%s %s %s) %s"
1636 set-cmd var val auto-cmd-label))
1637 (setq lisp-cmd-del-pattern
1638 (format "^\n?[ \t]*([ \t]*%s[ \t]+%s[ \t].*)[ \t]*%s"
1639 set-cmd var auto-cmd-label))
1640
1641 (if (and ask-if-save
1642 (y-or-n-p (format "Do you want to save this setting in %s "
1643 vip-custom-file-name)))
1644 (progn
1645 (vip-save-string-in-file
1646 actual-lisp-cmd vip-custom-file-name
1647 ;; del pattern
1648 lisp-cmd-del-pattern)
1649 (if (string= var "fill-column")
1650 (if (> val2 0)
1651 (vip-save-string-in-file
1652 (concat
1653 "(add-hook 'vip-insert-state-hooks 'turn-on-auto-fill) "
1654 auto-cmd-label)
1655 vip-custom-file-name
1656 delete-turn-on-auto-fill-pattern)
1657 (vip-save-string-in-file
1658 nil vip-custom-file-name delete-turn-on-auto-fill-pattern)
1659 (vip-save-string-in-file
1660 nil vip-custom-file-name
1661 ;; del pattern
1662 lisp-cmd-del-pattern)
1663 ))
1664 ))
1665
1666 (message "%s %s %s" set-cmd var (if (string-match "^[ \t]*$" val)
1667 (format "%S" val)
1668 val))
1669 (eval (car (read-from-string actual-lisp-cmd)))
1670 (if (string= var "fill-column")
1671 (if (> val2 0)
1672 (auto-fill-mode 1)
1673 (auto-fill-mode -1)))
1674
1675 ))
1676
1677 ;; In inline args, skip regex-forw and (optionally) chars-back.
1678 ;; Optional 3d arg is a string that should replace ' ' to prevent its
1679 ;; special meaning
1680 (defun ex-get-inline-cmd-args (regex-forw &optional chars-back replace-str)
1681 (save-excursion
1682 (set-buffer vip-ex-work-buf)
1683 (goto-char (point-min))
1684 (re-search-forward regex-forw nil t)
1685 (let ((beg (point))
1686 end)
1687 (goto-char (point-max))
1688 (if chars-back
1689 (skip-chars-backward chars-back)
1690 (skip-chars-backward " \t\n\C-m"))
1691 (setq end (point))
1692 ;; replace SPC with `=' to suppress the special meaning SPC has
1693 ;; in Ex commands
1694 (goto-char beg)
1695 (if replace-str
1696 (while (re-search-forward " +" nil t)
1697 (replace-match replace-str nil t)
1698 (vip-forward-char-carefully)))
1699 (goto-char end)
1700 (buffer-substring beg end))))
1701
1702
1703 ;; Ex shell command
1704 (defun ex-shell ()
1705 (shell))
1706
1707 ;; Viper help. Invokes Info
1708 (defun ex-help ()
1709 (condition-case nil
1710 (progn
1711 (pop-to-buffer (get-buffer-create "*info*"))
1712 (info (if vip-xemacs-p "viper.info" "viper"))
1713 (message "Type `i' to search for a specific topic"))
1714 (error (beep 1)
1715 (with-output-to-temp-buffer " *vip-info*"
1716 (princ (format "
1717 The Info file for Viper does not seem to be installed.
1718
1719 This file is part of the standard distribution of %sEmacs.
1720 Please contact your system administrator. "
1721 (if vip-xemacs-p "X" "")
1722 ))))))
1723
1724 ;; Ex source command. Loads the file specified as argument or `~/.vip'
1725 (defun ex-source ()
1726 (vip-get-ex-file)
1727 (if (string= ex-file "")
1728 (load vip-custom-file-name)
1729 (load ex-file)))
1730
1731 ;; Ex substitute command
1732 ;; If REPEAT use previous regexp which is ex-reg-exp or vip-s-string
1733 (defun ex-substitute (&optional repeat r-flag)
1734 (let ((opt-g nil)
1735 (opt-c nil)
1736 (matched-pos nil)
1737 (case-fold-search vip-case-fold-search)
1738 delim pat repl)
1739 (if repeat (setq ex-token nil) (setq delim (vip-get-ex-pat)))
1740 (if (null ex-token)
1741 (progn
1742 (setq pat (if r-flag vip-s-string ex-reg-exp))
1743 (or (stringp pat)
1744 (error "No previous pattern to use in substitution"))
1745 (setq repl ex-repl
1746 delim (string-to-char pat)))
1747 (setq pat (if (string= ex-token "") vip-s-string ex-token))
1748 (setq vip-s-string pat
1749 ex-reg-exp pat)
1750 (setq delim (vip-get-ex-pat))
1751 (if (null ex-token)
1752 (setq ex-token ""
1753 ex-repl "")
1754 (setq repl ex-token
1755 ex-repl ex-token)))
1756 (while (vip-get-ex-opt-gc delim)
1757 (if (string= ex-token "g") (setq opt-g t) (setq opt-c t)))
1758 (vip-get-ex-count)
1759 (if ex-count
1760 (save-excursion
1761 (if ex-addresses (goto-char (car ex-addresses)))
1762 (set-mark (point))
1763 (forward-line (1- ex-count))
1764 (setq ex-addresses (cons (point) (cons (mark t) nil))))
1765 (if (null ex-addresses)
1766 (setq ex-addresses (cons (point) (cons (point) nil)))
1767 (if (null (cdr ex-addresses))
1768 (setq ex-addresses (cons (car ex-addresses) ex-addresses)))))
1769 ;(setq G opt-g)
1770 (let ((beg (car ex-addresses))
1771 (end (car (cdr ex-addresses)))
1772 eol-mark)
1773 (save-excursion
1774 (vip-enlarge-region beg end)
1775 (let ((limit (save-excursion
1776 (goto-char (max (point) (mark t)))
1777 (point-marker))))
1778 (goto-char (min (point) (mark t)))
1779 (while (< (point) limit)
1780 (end-of-line)
1781 (setq eol-mark (point-marker))
1782 (beginning-of-line)
1783 (if opt-g
1784 (progn
1785 (while (and (not (eolp))
1786 (re-search-forward pat eol-mark t))
1787 (if (or (not opt-c) (y-or-n-p "Replace? "))
1788 (progn
1789 (setq matched-pos (point))
1790 (if (not (stringp repl))
1791 (error "Can't perform Ex substitution: No previous replacement pattern"))
1792 (replace-match repl t))))
1793 (end-of-line)
1794 (vip-forward-char-carefully))
1795 (if (null pat)
1796 (error
1797 "Can't repeat Ex substitution: No previous regular expression"))
1798 (if (and (re-search-forward pat eol-mark t)
1799 (or (not opt-c) (y-or-n-p "Replace? ")))
1800 (progn
1801 (setq matched-pos (point))
1802 (if (not (stringp repl))
1803 (error "Can't perform Ex substitution: No previous replacement pattern"))
1804 (replace-match repl t)))
1805 (end-of-line)
1806 (vip-forward-char-carefully))))))
1807 (if matched-pos (goto-char matched-pos))
1808 (beginning-of-line)
1809 (if opt-c (message "done"))))
1810
1811 ;; Ex tag command
1812 (defun ex-tag ()
1813 (let (tag)
1814 (save-window-excursion
1815 (set-buffer vip-ex-work-buf)
1816 (skip-chars-forward " \t")
1817 (set-mark (point))
1818 (skip-chars-forward "^ |\t\n")
1819 (setq tag (buffer-substring (mark t) (point))))
1820 (if (not (string= tag "")) (setq ex-tag tag))
1821 (vip-change-state-to-emacs)
1822 (condition-case conds
1823 (progn
1824 (if (string= tag "")
1825 (find-tag ex-tag t)
1826 (find-tag-other-window ex-tag))
1827 (vip-change-state-to-vi))
1828 (error
1829 (vip-change-state-to-vi)
1830 (vip-message-conditions conds)))))
1831
1832 ;; Ex write command
1833 (defun ex-write (q-flag)
1834 (vip-default-ex-addresses t)
1835 (vip-get-ex-file)
1836 (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses)))
1837 temp-buf writing-same-file region
1838 file-exists writing-whole-file)
1839 (if (> beg end) (error vip-FirstAddrExceedsSecond))
1840 (if ex-cmdfile
1841 (progn
1842 (vip-enlarge-region beg end)
1843 (shell-command-on-region (point) (mark t) ex-file))
1844 (if (and (string= ex-file "") (not (buffer-file-name)))
1845 (setq ex-file
1846 (read-file-name
1847 (format "Buffer %s isn't visiting any file. File to save in: "
1848 (buffer-name)))))
1849
1850 (setq writing-whole-file (and (= (point-min) beg) (= (point-max) end))
1851 ex-file (if (string= ex-file "")
1852 (buffer-file-name)
1853 (expand-file-name ex-file)))
1854 ;; if ex-file is a directory use the file portion of the buffer file name
1855 (if (and (file-directory-p ex-file)
1856 buffer-file-name
1857 (not (file-directory-p buffer-file-name)))
1858 (setq ex-file
1859 (concat ex-file (file-name-nondirectory buffer-file-name))))
1860
1861 (setq file-exists (file-exists-p ex-file)
1862 writing-same-file (string= ex-file (buffer-file-name)))
1863
1864 (if (and writing-whole-file writing-same-file)
1865 (if (not (buffer-modified-p))
1866 (message "(No changes need to be saved)")
1867 (save-buffer)
1868 (ex-write-info file-exists ex-file beg end))
1869 ;; writing some other file or portion of the currents
1870 ;; file---create temp buffer for it
1871 ;; disable undo in that buffer, for efficiency
1872 (buffer-disable-undo (setq temp-buf (create-file-buffer ex-file)))
1873 (unwind-protect
1874 (save-excursion
1875 (if (and file-exists
1876 (not writing-same-file)
1877 (not (yes-or-no-p
1878 (format "File %s exists. Overwrite? " ex-file))))
1879 (error "Quit")
1880 (vip-enlarge-region beg end)
1881 (setq region (buffer-substring (point) (mark t)))
1882 (set-buffer temp-buf)
1883 (set-visited-file-name ex-file)
1884 (erase-buffer)
1885 (if (and file-exists ex-append)
1886 (insert-file-contents ex-file))
1887 (goto-char (point-max))
1888 (insert region)
1889 (save-buffer)
1890 (ex-write-info file-exists ex-file (point-min) (point-max))
1891 )
1892 (set-buffer temp-buf)
1893 (set-buffer-modified-p nil)
1894 (kill-buffer temp-buf)
1895 ))
1896 )
1897 ;; this prevents the loss of data if writing part of the buffer
1898 (if (and (buffer-file-name) writing-same-file)
1899 (set-visited-file-modtime))
1900 (or writing-whole-file
1901 (not writing-same-file)
1902 (set-buffer-modified-p t))
1903 (if q-flag
1904 (if (< vip-expert-level 2)
1905 (save-buffers-kill-emacs)
1906 (kill-buffer (current-buffer))))
1907 )))
1908
1909
1910 (defun ex-write-info (exists file-name beg end)
1911 (message "`%s'%s %d lines, %d characters"
1912 (vip-abbreviate-file-name file-name)
1913 (if exists "" " [New file]")
1914 (count-lines beg (min (1+ end) (point-max)))
1915 (- end beg)))
1916
1917 ;; Ex yank command
1918 (defun ex-yank ()
1919 (vip-default-ex-addresses)
1920 (vip-get-ex-buffer)
1921 (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))))
1922 (if (> beg end) (error vip-FirstAddrExceedsSecond))
1923 (save-excursion
1924 (vip-enlarge-region beg end)
1925 (exchange-point-and-mark)
1926 (if (or ex-g-flag ex-g-variant)
1927 (error "Can't execute `yank' within `global'"))
1928 (if ex-count
1929 (progn
1930 (set-mark (point))
1931 (forward-line (1- ex-count)))
1932 (set-mark end))
1933 (vip-enlarge-region (point) (mark t))
1934 (if ex-flag (error "`yank': %s" vip-SpuriousText))
1935 (if ex-buffer
1936 (cond ((vip-valid-register ex-buffer '(Letter))
1937 (vip-append-to-register
1938 (downcase ex-buffer) (point) (mark t)))
1939 ((vip-valid-register ex-buffer)
1940 (copy-to-register ex-buffer (point) (mark t) nil))
1941 (t (error vip-InvalidRegister ex-buffer))))
1942 (copy-region-as-kill (point) (mark t)))))
1943
1944 ;; Execute shell command
1945 (defun ex-command ()
1946 (let (command)
1947 (save-window-excursion
1948 (set-buffer vip-ex-work-buf)
1949 (skip-chars-forward " \t")
1950 (setq command (buffer-substring (point) (point-max)))
1951 (end-of-line))
1952 (setq command (ex-expand-filsyms command (current-buffer)))
1953 (if (and (> (length command) 0) (string= "!" (substring command 0 1)))
1954 (if vip-ex-last-shell-com
1955 (setq command (concat vip-ex-last-shell-com (substring command 1)))
1956 (error "No previous shell command")))
1957 (setq vip-ex-last-shell-com command)
1958 (if (null ex-addresses)
1959 (shell-command command)
1960 (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))))
1961 (if (null beg) (setq beg end))
1962 (save-excursion
1963 (goto-char beg)
1964 (set-mark end)
1965 (vip-enlarge-region (point) (mark t))
1966 (shell-command-on-region (point) (mark t) command t))
1967 (goto-char beg)))))
1968
1969 ;; Print line number
1970 (defun ex-line-no ()
1971 (message "%d"
1972 (1+ (count-lines
1973 (point-min)
1974 (if (null ex-addresses) (point-max) (car ex-addresses))))))
1975
1976 ;; Give information on the file visited by the current buffer
1977 (defun vip-info-on-file ()
1978 (interactive)
1979 (let ((pos1 (vip-line-pos 'start))
1980 (pos2 (vip-line-pos 'end))
1981 lines file info)
1982 (setq lines (count-lines (point-min) (vip-line-pos 'end))
1983 file (if (buffer-file-name)
1984 (concat (vip-abbreviate-file-name (buffer-file-name)) ":")
1985 (concat (buffer-name) " [Not visiting any file]:"))
1986 info (format "line=%d/%d pos=%d/%d col=%d %s"
1987 (if (= pos1 pos2)
1988 (1+ lines)
1989 lines)
1990 (count-lines (point-min) (point-max))
1991 (point) (1- (point-max))
1992 (1+ (current-column))
1993 (if (buffer-modified-p) "[Modified]" "[Unchanged]")))
1994 (if (< (+ 1 (length info) (length file))
1995 (window-width (minibuffer-window)))
1996 (message (concat file " " info))
1997 (save-window-excursion
1998 (with-output-to-temp-buffer " *vip-info*"
1999 (princ (concat "\n"
2000 file "\n\n\t" info
2001 "\n\n\nPress any key to continue...\n\n")))
2002 (vip-read-event)
2003 (kill-buffer " *vip-info*")))
2004 ))
2005
2006
2007 (provide 'viper-ex)
2008
2009 ;;; viper-ex.el ends here