1 ;;; viper-cmd.el --- Vi command support for Viper
2 ;; Copyright (C) 1997 Free Software Foundation, Inc.
4 ;; This file is part of GNU Emacs.
6 ;; GNU Emacs is free software; you can redistribute it and/or modify
7 ;; it under the terms of the GNU General Public License as published by
8 ;; the Free Software Foundation; either version 2, or (at your option)
11 ;; GNU Emacs is distributed in the hope that it will be useful,
12 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ;; GNU General Public License for more details.
16 ;; You should have received a copy of the GNU General Public License
17 ;; along with GNU Emacs; see the file COPYING. If not, write to the
18 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 ;; Boston, MA 02111-1307, USA.
27 (defvar viper-minibuffer-current-face
)
28 (defvar viper-minibuffer-insert-face
)
29 (defvar viper-minibuffer-vi-face
)
30 (defvar viper-minibuffer-emacs-face
)
32 (defvar viper-mode-string
)
33 (defvar viper-custom-file-name
)
34 (defvar iso-accents-mode
)
36 (defvar quail-current-str
)
37 (defvar zmacs-region-stays
)
38 (defvar mark-even-if-inactive
)
40 ;; loading happens only in non-interactive compilation
41 ;; in order to spare non-viperized emacs from being viperized
44 (let ((load-path (cons (expand-file-name ".") load-path
)))
45 (or (featurep 'viper-util
)
46 (load "viper-util.el" nil nil
'nosuffix
))
47 (or (featurep 'viper-keym
)
48 (load "viper-keym.el" nil nil
'nosuffix
))
49 (or (featurep 'viper-mous
)
50 (load "viper-mous.el" nil nil
'nosuffix
))
51 (or (featurep 'viper-macs
)
52 (load "viper-macs.el" nil nil
'nosuffix
))
53 (or (featurep 'viper-ex
)
54 (load "viper-ex.el" nil nil
'nosuffix
))
69 ;; These test functions are shamelessly lifted from vip 4.4.2 by Aamod Sane
71 ;; generate test functions
72 ;; given symbol foo, foo-p is the test function, foos is the set of
74 ;; (macroexpand '(viper-test-com-defun foo))
75 ;; (defun foo-p (com) (consp (memq (if (< com 0) (- com) com) foos)))
77 (defmacro viper-test-com-defun
(name)
78 (let* ((snm (symbol-name name
))
79 (nm-p (intern (concat snm
"-p")))
80 (nms (intern (concat snm
"s"))))
82 (consp (viper-memq-char
83 (if (and (viper-characterp com
) (< com
0))
88 ;; Variables for defining VI commands
90 ;; Modifying commands that can be prefixes to movement commands
91 (defconst viper-prefix-commands
'(?c ?d ?y ?
! ?
= ?
# ?
< ?
> ?
\"))
92 ;; define viper-prefix-command-p
93 (viper-test-com-defun viper-prefix-command)
95 ;; Commands that are pairs eg. dd. r and R here are a hack
96 (defconst viper-charpair-commands
'(?c ?d ?y ?
! ?
= ?
< ?
> ?r ?R
))
97 ;; define viper-charpair-command-p
98 (viper-test-com-defun viper-charpair-command)
100 (defconst viper-movement-commands
'(?b ?B ?e ?E ?f ?F ?G ?h ?H ?j ?k ?l
101 ?H ?M ?L ?n ?t ?T ?w ?W ?$ ?%
102 ?^ ?
( ?
) ?- ?
+ ?| ?
{ ?
} ?
[ ?
] ?
' ?
`
103 ?\
; ?, ?0 ?? ?/ ?\ ?\C-m
108 ;; define viper-movement-command-p
109 (viper-test-com-defun viper-movement-command)
112 (defconst viper-digit-commands
'(?
1 ?
2 ?
3 ?
4 ?
5 ?
6 ?
7 ?
8 ?
9))
114 ;; define viper-digit-command-p
115 (viper-test-com-defun viper-digit-command)
117 ;; Commands that can be repeated by . (dotted)
118 (defconst viper-dotable-commands
'(?c ?d ?C ?s ?S ?D ?
> ?
<))
119 ;; define viper-dotable-command-p
120 (viper-test-com-defun viper-dotable-command)
122 ;; Commands that can follow a #
123 (defconst viper-hash-commands
'(?c ?C ?g ?q ?s
))
124 ;; define viper-hash-command-p
125 (viper-test-com-defun viper-hash-command)
127 ;; Commands that may have registers as prefix
128 (defconst viper-regsuffix-commands
'(?d ?y ?Y ?D ?p ?P ?x ?X
))
129 ;; define viper-regsuffix-command-p
130 (viper-test-com-defun viper-regsuffix-command)
132 (defconst viper-vi-commands
(append viper-movement-commands
134 viper-dotable-commands
135 viper-charpair-commands
137 viper-prefix-commands
138 viper-regsuffix-commands
)
139 "The list of all commands in Vi-state.")
140 ;; define viper-vi-command-p
141 (viper-test-com-defun viper-vi-command)
143 ;; Where viper saves mark. This mark is resurrected by m^
144 (defvar viper-saved-mark nil
)
152 ;; Runs viper-after-change-functions inside after-change-functions
153 (defun viper-after-change-sentinel (beg end len
)
154 (run-hook-with-args 'viper-after-change-functions beg end len
))
156 ;; Runs viper-before-change-functions inside before-change-functions
157 (defun viper-before-change-sentinel (beg end
)
158 (run-hook-with-args 'viper-before-change-functions beg end
))
160 (defsubst viper-post-command-sentinel
()
161 (run-hooks 'viper-post-command-hooks
)
162 (if (eq viper-current-state
'vi-state
)
163 (viper-restore-cursor-color 'after-insert-mode
)))
165 (defsubst viper-pre-command-sentinel
()
166 (run-hooks 'viper-pre-command-hooks
))
168 ;; Needed so that Viper will be able to figure the last inserted
169 ;; chunk of text with reasonable accuracy.
170 (defsubst viper-insert-state-post-command-sentinel
()
171 (if (and (memq viper-current-state
'(insert-state replace-state
))
173 (>= (point) viper-insert-point
))
174 (setq viper-last-posn-while-in-insert-state
(point-marker)))
175 (or (viper-overlay-p viper-replace-overlay
)
177 (viper-set-replace-overlay (point-min) (point-min))
178 (viper-hide-replace-overlay)))
179 (if (eq viper-current-state
'insert-state
)
180 (let ((has-saved-cursor-color-in-insert-mode
181 (stringp (viper-get-saved-cursor-color-in-insert-mode))))
182 (or has-saved-cursor-color-in-insert-mode
183 (string= (viper-get-cursor-color) viper-insert-state-cursor-color
)
184 ;; save current color, if not already saved
185 (viper-save-cursor-color 'before-insert-mode
))
186 ;; set insert mode cursor color
187 (viper-change-cursor-color viper-insert-state-cursor-color
)))
189 (if (and (memq this-command
'(dabbrev-expand hippie-expand
))
190 (integerp viper-pre-command-point
)
191 (markerp viper-insert-point
)
192 (marker-position viper-insert-point
)
193 (> viper-insert-point viper-pre-command-point
))
194 (viper-move-marker-locally viper-insert-point viper-pre-command-point
))
197 (defsubst viper-preserve-cursor-color
()
198 (or (memq this-command
'(self-insert-command
199 viper-del-backward-char-in-insert
200 viper-del-backward-char-in-replace
201 viper-delete-backward-char
204 (memq (viper-event-key last-command-event
)
205 '(up down left right
(meta f
) (meta b
)
206 (control n
) (control p
) (control f
) (control b
)))))
208 (defsubst viper-insert-state-pre-command-sentinel
()
209 (or (viper-preserve-cursor-color)
210 (viper-restore-cursor-color 'after-insert-mode
))
211 (if (and (memq this-command
'(dabbrev-expand hippie-expand
))
212 (markerp viper-insert-point
)
213 (marker-position viper-insert-point
))
214 (setq viper-pre-command-point
(marker-position viper-insert-point
))))
216 (defsubst viper-R-state-post-command-sentinel
()
217 ;; Restoring cursor color is needed despite
218 ;; viper-replace-state-pre-command-sentinel: When you jump to another buffer
219 ;; in another frame, the pre-command hook won't change cursor color to
220 ;; default in that other frame. So, if the second frame cursor was red and
221 ;; we set the point outside the replacement region, then the cursor color
222 ;; will remain red. Restoring the default, below, prevents this.
223 (if (and (<= (viper-replace-start) (point))
224 (<= (point) (viper-replace-end)))
225 (viper-change-cursor-color viper-replace-overlay-cursor-color
)
226 (viper-restore-cursor-color 'after-replace-mode
)
229 ;; to speed up, don't change cursor color before self-insert
230 ;; and common move commands
231 (defsubst viper-replace-state-pre-command-sentinel
()
232 (or (viper-preserve-cursor-color)
233 (viper-restore-cursor-color 'after-replace-mode
)))
236 ;; Make sure we don't delete more than needed.
237 ;; This is executed at viper-last-posn-in-replace-region
238 (defsubst viper-trim-replace-chars-to-delete-if-necessary
()
239 (setq viper-replace-chars-to-delete
241 (min viper-replace-chars-to-delete
242 ;; Don't delete more than to the end of repl overlay
243 (viper-chars-in-region
244 (viper-replace-end) viper-last-posn-in-replace-region
)
245 ;; point is viper-last-posn-in-replace-region now
246 ;; So, this limits deletion to the end of line
247 (viper-chars-in-region (point) (viper-line-pos 'end
))
251 (defun viper-replace-state-post-command-sentinel ()
252 ;; Restoring cursor color is needed despite
253 ;; viper-replace-state-pre-command-sentinel: When one jumps to another buffer
254 ;; in another frame, the pre-command hook won't change cursor color to
255 ;; default in that other frame. So, if the second frame cursor was red and
256 ;; we set the point outside the replacement region, then the cursor color
257 ;; will remain red. Restoring the default, below, fixes this problem.
259 ;; We optimize for some commands, like self-insert-command,
260 ;; viper-delete-backward-char, etc., since they either don't change
261 ;; cursor color or, if they terminate replace mode, the color will be changed
262 ;; in viper-finish-change
263 (or (viper-preserve-cursor-color)
264 (viper-restore-cursor-color 'after-replace-mode
))
266 ((eq viper-current-state
'replace-state
)
267 ;; delete characters to compensate for inserted chars.
268 (let ((replace-boundary (viper-replace-end)))
270 (goto-char viper-last-posn-in-replace-region
)
271 (viper-trim-replace-chars-to-delete-if-necessary)
272 (delete-char viper-replace-chars-to-delete
)
273 (setq viper-replace-chars-to-delete
0)
274 ;; terminate replace mode if reached replace limit
275 (if (= viper-last-posn-in-replace-region
(viper-replace-end))
276 (viper-finish-change)))
278 (if (viper-pos-within-region
279 (point) (viper-replace-start) replace-boundary
)
281 ;; the state may have changed in viper-finish-change above
282 (if (eq viper-current-state
'replace-state
)
283 (viper-change-cursor-color viper-replace-overlay-cursor-color
))
284 (setq viper-last-posn-in-replace-region
(point-marker))))
286 ;; terminate replace mode if changed Viper states.
287 (t (viper-finish-change))))
292 ;; Change state to NEW-STATE---either emacs-state, vi-state, or insert-state.
293 (defun viper-change-state (new-state)
294 ;; Keep viper-post/pre-command-hooks fresh.
295 ;; We remove then add viper-post/pre-command-sentinel since it is very
296 ;; desirable that viper-pre-command-sentinel is the last hook and
297 ;; viper-post-command-sentinel is the first hook.
299 (make-local-hook 'viper-after-change-functions
)
300 (make-local-hook 'viper-before-change-functions
)
301 (make-local-hook 'viper-post-command-hooks
)
302 (make-local-hook 'viper-pre-command-hooks
)
304 (remove-hook 'post-command-hook
'viper-post-command-sentinel
)
305 (add-hook 'post-command-hook
'viper-post-command-sentinel
)
306 (remove-hook 'pre-command-hook
'viper-pre-command-sentinel
)
307 (add-hook 'pre-command-hook
'viper-pre-command-sentinel t
)
308 ;; These hooks will be added back if switching to insert/replace mode
309 (remove-hook 'viper-post-command-hooks
310 'viper-insert-state-post-command-sentinel
'local
)
311 (remove-hook 'viper-pre-command-hooks
312 'viper-insert-state-pre-command-sentinel
'local
)
313 (setq viper-intermediate-command nil
)
314 (cond ((eq new-state
'vi-state
)
315 (cond ((member viper-current-state
'(insert-state replace-state
))
317 ;; move viper-last-posn-while-in-insert-state
318 ;; This is a normal hook that is executed in insert/replace
319 ;; states after each command. In Vi/Emacs state, it does
320 ;; nothing. We need to execute it here to make sure that
321 ;; the last posn was recorded when we hit ESC.
322 ;; It may be left unrecorded if the last thing done in
323 ;; insert/repl state was dabbrev-expansion or abbrev
324 ;; expansion caused by hitting ESC
325 (viper-insert-state-post-command-sentinel)
327 (condition-case conds
329 (viper-save-last-insertion
331 viper-last-posn-while-in-insert-state
)
332 (if viper-began-as-replace
333 (setq viper-began-as-replace nil
)
334 ;; repeat insert commands if numerical arg > 1
336 (viper-repeat-insert-command))))
338 (viper-message-conditions conds
)))
340 (if (> (length viper-last-insertion
) 0)
341 (viper-push-onto-ring viper-last-insertion
342 'viper-insertion-ring
))
344 (if viper-ESC-moves-cursor-back
345 (or (bolp) (backward-char 1))))
349 ((memq new-state
'(insert-state replace-state
))
350 (if (memq viper-current-state
'(emacs-state vi-state
))
351 (viper-move-marker-locally 'viper-insert-point
(point)))
352 (viper-move-marker-locally
353 'viper-last-posn-while-in-insert-state
(point))
354 (add-hook 'viper-post-command-hooks
355 'viper-insert-state-post-command-sentinel t
'local
)
356 (add-hook 'viper-pre-command-hooks
357 'viper-insert-state-pre-command-sentinel t
'local
))
360 ;; Nothing needs to be done to switch to emacs mode! Just set some
361 ;; variables, which is already done in viper-change-state-to-emacs!
364 ;; always turn off iso-accents-mode in vi-state, or else we won't be able to
365 ;; use the keys `,',^ , as they will do accents instead of Vi actions.
366 (cond ((eq new-state
'vi-state
) (viper-set-iso-accents-mode nil
));accents off
367 (viper-automatic-iso-accents (viper-set-iso-accents-mode t
));accents on
368 (t (viper-set-iso-accents-mode nil
)))
369 ;; Always turn off quail mode in vi state
370 (cond ((eq new-state
'vi-state
) (viper-set-input-method nil
)) ;intl input off
371 (viper-special-input-method (viper-set-input-method t
)) ;intl input on
372 (t (viper-set-input-method nil
)))
374 (setq viper-current-state new-state
)
376 (viper-update-syntax-classes)
377 (viper-normalize-minor-mode-map-alist)
378 (viper-adjust-keys-for new-state
)
379 (viper-set-mode-vars-for new-state
)
380 (viper-refresh-mode-line)
385 (defun viper-adjust-keys-for (state)
386 "Make necessary adjustments to keymaps before entering STATE."
387 (cond ((memq state
'(insert-state replace-state
))
388 (if viper-auto-indent
390 (define-key viper-insert-basic-map
"\C-m" 'viper-autoindent
)
391 (if viper-want-emacs-keys-in-insert
393 (define-key viper-insert-basic-map
"\C-j" nil
)
395 (define-key viper-insert-basic-map
"\C-j" 'viper-autoindent
)))
396 (define-key viper-insert-basic-map
"\C-m" nil
)
397 (define-key viper-insert-basic-map
"\C-j" nil
))
399 (setq viper-insert-diehard-minor-mode
400 (not viper-want-emacs-keys-in-insert
))
402 (if viper-want-ctl-h-help
404 (define-key viper-insert-basic-map
"\C-h" 'help-command
)
405 (define-key viper-replace-map
"\C-h" 'help-command
))
406 (define-key viper-insert-basic-map
407 "\C-h" 'viper-del-backward-char-in-insert
)
408 (define-key viper-replace-map
409 "\C-h" 'viper-del-backward-char-in-replace
))
410 ;; In XEmacs, C-h overrides backspace, so we make sure it doesn't.
411 (define-key viper-insert-basic-map
412 [backspace] 'viper-del-backward-char-in-insert)
413 (define-key viper-replace-map
414 [backspace] 'viper-del-backward-char-in-replace
)
415 ) ; end insert/replace case
417 (setq viper-vi-diehard-minor-mode
(not viper-want-emacs-keys-in-vi
))
418 (if viper-want-ctl-h-help
419 (define-key viper-vi-basic-map
"\C-h" 'help-command
)
420 (define-key viper-vi-basic-map
"\C-h" 'viper-backward-char
))
421 ;; In XEmacs, C-h overrides backspace, so we make sure it doesn't.
422 (define-key viper-vi-basic-map
[backspace] 'viper-backward-char))
426 ;; Normalizes minor-mode-map-alist by putting Viper keymaps first.
427 ;; This ensures that Viper bindings are in effect, regardless of which minor
428 ;; modes were turned on by the user or by other packages.
429 (defun viper-normalize-minor-mode-map-alist ()
430 (setq minor-mode-map-alist
431 (viper-append-filter-alist
432 (list (cons 'viper-vi-intercept-minor-mode viper-vi-intercept-map)
433 (cons 'viper-vi-minibuffer-minor-mode viper-minibuffer-map)
434 (cons 'viper-vi-local-user-minor-mode viper-vi-local-user-map)
435 (cons 'viper-vi-kbd-minor-mode viper-vi-kbd-map)
436 (cons 'viper-vi-global-user-minor-mode viper-vi-global-user-map)
437 (cons 'viper-vi-state-modifier-minor-mode
439 (cdr (assoc major-mode
440 viper-vi-state-modifier-alist)))
441 (cdr (assoc major-mode viper-vi-state-modifier-alist))
443 (cons 'viper-vi-diehard-minor-mode viper-vi-diehard-map)
444 (cons 'viper-vi-basic-minor-mode viper-vi-basic-map)
445 (cons 'viper-insert-intercept-minor-mode
446 viper-insert-intercept-map)
447 (cons 'viper-replace-minor-mode viper-replace-map)
448 ;; viper-insert-minibuffer-minor-mode must come after
449 ;; viper-replace-minor-mode
450 (cons 'viper-insert-minibuffer-minor-mode
451 viper-minibuffer-map)
452 (cons 'viper-insert-local-user-minor-mode
453 viper-insert-local-user-map)
454 (cons 'viper-insert-kbd-minor-mode viper-insert-kbd-map)
455 (cons 'viper-insert-global-user-minor-mode
456 viper-insert-global-user-map)
457 (cons 'viper-insert-state-modifier-minor-mode
459 (cdr (assoc major-mode
460 viper-insert-state-modifier-alist)))
461 (cdr (assoc major-mode
462 viper-insert-state-modifier-alist))
464 (cons 'viper-insert-diehard-minor-mode viper-insert-diehard-map)
465 (cons 'viper-insert-basic-minor-mode viper-insert-basic-map)
466 (cons 'viper-emacs-intercept-minor-mode
467 viper-emacs-intercept-map)
468 (cons 'viper-emacs-local-user-minor-mode
469 viper-emacs-local-user-map)
470 (cons 'viper-emacs-kbd-minor-mode viper-emacs-kbd-map)
471 (cons 'viper-emacs-global-user-minor-mode
472 viper-emacs-global-user-map)
473 (cons 'viper-emacs-state-modifier-minor-mode
476 (assoc major-mode viper-emacs-state-modifier-alist)))
478 (assoc major-mode viper-emacs-state-modifier-alist))
481 minor-mode-map-alist)))
485 ;; Viper mode-changing commands and utilities
487 ;; Modifies mode-line-buffer-identification.
488 (defun viper-refresh-mode-line ()
489 (setq viper-mode-string
490 (cond ((eq viper-current-state 'emacs-state) viper-emacs-state-id)
491 ((eq viper-current-state 'vi-state) viper-vi-state-id)
492 ((eq viper-current-state 'replace-state) viper-replace-state-id)
493 ((eq viper-current-state 'insert-state) viper-insert-state-id)))
495 ;; Sets Viper mode string in global-mode-string
496 (force-mode-line-update))
499 ;; Switch from Insert state to Vi state.
500 (defun viper-exit-insert-state ()
502 (viper-change-state-to-vi))
504 (defun viper-set-mode-vars-for (state)
505 "Sets Viper minor mode variables to put Viper's state STATE in effect."
508 (setq viper-vi-minibuffer-minor-mode nil
509 viper-insert-minibuffer-minor-mode nil
510 viper-vi-intercept-minor-mode nil
511 viper-insert-intercept-minor-mode nil
513 viper-vi-local-user-minor-mode nil
514 viper-vi-kbd-minor-mode nil
515 viper-vi-global-user-minor-mode nil
516 viper-vi-state-modifier-minor-mode nil
517 viper-vi-diehard-minor-mode nil
518 viper-vi-basic-minor-mode nil
520 viper-replace-minor-mode nil
522 viper-insert-local-user-minor-mode nil
523 viper-insert-kbd-minor-mode nil
524 viper-insert-global-user-minor-mode nil
525 viper-insert-state-modifier-minor-mode nil
526 viper-insert-diehard-minor-mode nil
527 viper-insert-basic-minor-mode nil
528 viper-emacs-intercept-minor-mode t
529 viper-emacs-local-user-minor-mode t
530 viper-emacs-kbd-minor-mode (not (viper-is-in-minibuffer))
531 viper-emacs-global-user-minor-mode t
532 viper-emacs-state-modifier-minor-mode t
536 (if (eq state 'vi-state) ; adjust for vi-state
538 viper-vi-intercept-minor-mode t
539 viper-vi-minibuffer-minor-mode (viper-is-in-minibuffer)
540 viper-vi-local-user-minor-mode t
541 viper-vi-kbd-minor-mode (not (viper-is-in-minibuffer))
542 viper-vi-global-user-minor-mode t
543 viper-vi-state-modifier-minor-mode t
544 ;; don't let the diehard keymap block command completion
545 ;; and other things in the minibuffer
546 viper-vi-diehard-minor-mode (not
547 (or viper-want-emacs-keys-in-vi
548 (viper-is-in-minibuffer)))
549 viper-vi-basic-minor-mode t
550 viper-emacs-intercept-minor-mode nil
551 viper-emacs-local-user-minor-mode nil
552 viper-emacs-kbd-minor-mode nil
553 viper-emacs-global-user-minor-mode nil
554 viper-emacs-state-modifier-minor-mode nil
557 ;; Insert and Replace states
558 (if (member state '(insert-state replace-state))
560 viper-insert-intercept-minor-mode t
561 viper-replace-minor-mode (eq state 'replace-state)
562 viper-insert-minibuffer-minor-mode (viper-is-in-minibuffer)
563 viper-insert-local-user-minor-mode t
564 viper-insert-kbd-minor-mode (not (viper-is-in-minibuffer))
565 viper-insert-global-user-minor-mode t
566 viper-insert-state-modifier-minor-mode t
567 ;; don't let the diehard keymap block command completion
568 ;; and other things in the minibuffer
569 viper-insert-diehard-minor-mode (not
571 viper-want-emacs-keys-in-insert
572 (viper-is-in-minibuffer)))
573 viper-insert-basic-minor-mode t
574 viper-emacs-intercept-minor-mode nil
575 viper-emacs-local-user-minor-mode nil
576 viper-emacs-kbd-minor-mode nil
577 viper-emacs-global-user-minor-mode nil
578 viper-emacs-state-modifier-minor-mode nil
582 (if (viper-has-face-support-p)
583 (setq viper-minibuffer-current-face
584 (cond ((eq state 'emacs-state) viper-minibuffer-emacs-face)
585 ((eq state 'vi-state) viper-minibuffer-vi-face)
586 ((memq state '(insert-state replace-state))
587 viper-minibuffer-insert-face))))
589 (if (viper-is-in-minibuffer)
590 (viper-set-minibuffer-overlay))
593 ;; This also takes care of the annoying incomplete lines in files.
594 ;; Also, this fixes `undo' to work vi-style for complex commands.
595 (defun viper-change-state-to-vi ()
596 "Change Viper state to Vi."
598 (if (and viper-first-time (not (viper-is-in-minibuffer)))
600 (if overwrite-mode (overwrite-mode -1))
601 (or (viper-overlay-p viper-replace-overlay)
602 (viper-set-replace-overlay (point-min) (point-min)))
603 (viper-hide-replace-overlay)
604 (if abbrev-mode (expand-abbrev))
605 (if (and auto-fill-function (> (current-column) fill-column))
606 (funcall auto-fill-function))
607 ;; don't leave whitespace lines around
608 (if (and (memq last-command
610 viper-open-line viper-Open-line
611 viper-replace-state-exit-cmd))
612 (viper-over-whitespace-line))
613 (indent-to-left-margin))
614 (viper-add-newline-at-eob-if-necessary)
616 (viper-change-state 'vi-state)
618 (viper-restore-cursor-color 'after-insert-mode)
620 ;; Protect against user errors in hooks
621 (condition-case conds
622 (run-hooks 'viper-vi-state-hook)
624 (viper-message-conditions conds)))))
626 (defun viper-change-state-to-insert ()
627 "Change Viper state to Insert."
629 (viper-change-state 'insert-state)
631 (or (viper-overlay-p viper-replace-overlay)
632 (viper-set-replace-overlay (point-min) (point-min)))
633 (viper-hide-replace-overlay)
635 (let ((has-saved-cursor-color-in-insert-mode
636 (stringp (viper-get-saved-cursor-color-in-insert-mode))))
637 (or has-saved-cursor-color-in-insert-mode
638 (string= (viper-get-cursor-color) viper-insert-state-cursor-color)
639 (viper-save-cursor-color 'before-insert-mode))
640 (viper-change-cursor-color viper-insert-state-cursor-color))
642 ;; Protect against user errors in hooks
643 (condition-case conds
644 (run-hooks 'viper-insert-state-hook)
646 (viper-message-conditions conds))))
648 (defsubst viper-downgrade-to-insert ()
649 ;; Protect against user errors in hooks
650 (condition-case conds
651 (run-hooks 'viper-insert-state-hook)
653 (viper-message-conditions conds)))
654 (setq viper-current-state 'insert-state
655 viper-replace-minor-mode nil))
659 ;; Change to replace state. When the end of replacement region is reached,
660 ;; replace state changes to insert state.
661 (defun viper-change-state-to-replace (&optional non-R-cmd)
662 (viper-change-state 'replace-state)
663 ;; Run insert-state-hook
664 (condition-case conds
665 (run-hooks 'viper-insert-state-hook 'viper-replace-state-hook)
667 (viper-message-conditions conds)))
670 (viper-start-replace)
671 ;; 'R' is implemented using Emacs's overwrite-mode
672 (viper-start-R-mode))
676 (defun viper-change-state-to-emacs ()
677 "Change Viper state to Emacs."
679 (or (viper-overlay-p viper-replace-overlay)
680 (viper-set-replace-overlay (point-min) (point-min)))
681 (viper-hide-replace-overlay)
682 (viper-change-state 'emacs-state)
684 ;; Protect agains user errors in hooks
685 (condition-case conds
686 (run-hooks 'viper-emacs-state-hook)
688 (viper-message-conditions conds))))
690 ;; escape to emacs mode termporarily
691 (defun viper-escape-to-emacs (arg &optional events)
692 "Escape to Emacs state from Vi state for one Emacs command.
693 ARG is used as the prefix value for the executed command. If
694 EVENTS is a list of events, which become the beginning of the command."
696 (if (viper= last-command-char ?\\)
697 (message "Switched to EMACS state for the next command..."))
698 (viper-escape-to-state arg events 'emacs-state))
700 ;; escape to Vi mode termporarily
701 (defun viper-escape-to-vi (arg)
702 "Escape from Emacs state to Vi state for one Vi 1-character command.
703 If the Vi command that the user types has a prefix argument, e.g., `d2w', then
704 Vi's prefix argument will be used. Otherwise, the prefix argument passed to
705 `viper-escape-to-vi' is used."
707 (message "Switched to VI state for the next command...")
708 (viper-escape-to-state arg nil 'vi-state))
710 ;; Escape to STATE mode for one Emacs command.
711 (defun viper-escape-to-state (arg events state)
712 ;;(let (com key prefix-arg)
714 ;; this temporarily turns off Viper's minor mode keymaps
715 (viper-set-mode-vars-for state)
716 (viper-normalize-minor-mode-map-alist)
717 (if events (viper-set-unread-command-events events))
719 ;; protect against keyboard quit and other errors
721 (let (viper-vi-kbd-minor-mode
722 viper-insert-kbd-minor-mode
723 viper-emacs-kbd-minor-mode)
726 (setq com (key-binding (setq key
728 (read-key-sequence nil)
729 (read-key-sequence nil t)))))
730 ;; In case of binding indirection--chase definitions.
731 ;; Have to do it here because we execute this command under
732 ;; different keymaps, so command-execute may not do the
734 (while (vectorp com) (setq com (key-binding com))))
736 ;; Execute command com in the original Viper state, not in state
737 ;; `state'. Otherwise, if we switch buffers while executing the
738 ;; escaped to command, Viper's mode vars will remain those of
739 ;; `state'. When we return to the orig buffer, the bindings will be
741 (viper-set-mode-vars-for viper-current-state)
743 ;; this-command, last-command-char, last-command-event
744 (setq this-command com)
745 (if viper-xemacs-p ; XEmacs represents key sequences as vectors
746 (setq last-command-event
747 (viper-copy-event (viper-seq-last-elt key))
748 last-command-char (event-to-character last-command-event))
749 ;; Emacs represents them as sequences (str or vec)
750 (setq last-command-event
751 (viper-copy-event (viper-seq-last-elt key))
752 last-command-char last-command-event))
756 (setq prefix-arg (or prefix-arg arg))
757 (command-execute com)))
761 ;; set state in the new buffer
762 (viper-set-mode-vars-for viper-current-state))
764 (defun viper-exec-form-in-vi (form)
765 "Execute FORM in Vi state, regardless of the Ccurrent Vi state."
766 (let ((buff (current-buffer))
768 (viper-set-mode-vars-for 'vi-state)
771 (let (viper-vi-kbd-minor-mode) ; execute without kbd macros
772 (setq result (eval form))
777 (if (not (equal buff (current-buffer))) ; cmd switched buffer
780 (viper-set-mode-vars-for viper-current-state)))
781 (viper-set-mode-vars-for viper-current-state)
784 (defun viper-exec-form-in-emacs (form)
785 "Execute FORM in Emacs, temporarily disabling Viper's minor modes.
786 Similar to viper-escape-to-emacs, but accepts forms rather than keystrokes."
787 (let ((buff (current-buffer))
789 (viper-set-mode-vars-for 'emacs-state)
790 (setq result (eval form))
791 (if (not (equal buff (current-buffer))) ; cmd switched buffer
794 (viper-set-mode-vars-for viper-current-state)))
795 (viper-set-mode-vars-for viper-current-state)
799 ;; This is needed because minor modes sometimes override essential Viper
800 ;; bindings. By letting Viper know which files these modes are in, it will
801 ;; arrange to reorganize minor-mode-map-alist so that things will work right.
802 (defun viper-harness-minor-mode (load-file)
803 "Familiarize Viper with a minor mode defined in LOAD_FILE.
804 Minor modes that have their own keymaps may overshadow Viper keymaps.
805 This function is designed to make Viper aware of the packages that define
808 (viper-harness-minor-mode load-file)
810 LOAD-FILE is a name of the file where the specific minor mode is defined.
811 Suffixes such as .el or .elc should be stripped."
813 (interactive "sEnter name of the load file: ")
815 (eval-after-load load-file '(viper-normalize-minor-mode-map-alist))
817 ;; Change the default for minor-mode-map-alist each time a harnessed minor
818 ;; mode adds its own keymap to the a-list.
820 load-file '(setq-default minor-mode-map-alist minor-mode-map-alist))
824 (defun viper-ESC (arg)
825 "Emulate ESC key in Emacs.
826 Prevents multiple escape keystrokes if viper-no-multiple-ESC is true.
827 If viper-no-multiple-ESC is 'twice double ESC would ding in vi-state.
828 Other ESC sequences are emulated via the current Emacs's major mode
829 keymap. This is more convenient on TTYs, since this won't block
830 function keys such as up,down, etc. ESC will also will also work as
831 a Meta key in this case. When viper-no-multiple-ESC is nil, ESC functions
832 as a Meta key and any number of multiple escapes is allowed."
835 (cond ((and (not viper-no-multiple-ESC) (eq viper-current-state 'vi-state))
836 (setq char (viper-read-char-exclusive))
837 (viper-escape-to-emacs arg (list ?\e char) ))
838 ((and (eq viper-no-multiple-ESC 'twice)
839 (eq viper-current-state 'vi-state))
840 (setq char (viper-read-char-exclusive))
841 (if (= char (string-to-char viper-ESC-key))
843 (viper-escape-to-emacs arg (list ?\e char) )))
847 (defun viper-alternate-Meta-key (arg)
848 "Simulate Emacs Meta key."
850 (sit-for 1) (message "ESC-")
851 (viper-escape-to-emacs arg '(?\e)))
853 (defun viper-toggle-key-action ()
854 "Action bound to `viper-toggle-key'."
856 (if (and (< viper-expert-level 2) (equal viper-toggle-key "\C-z"))
857 (if (viper-window-display-p)
860 (viper-change-state-to-emacs)))
863 ;; Intercept ESC sequences on dumb terminals.
864 ;; Based on the idea contributed by Marcelino Veiga Tuimil <mveiga@dit.upm.es>
866 ;; Check if last key was ESC and if so try to reread it as a function key.
867 ;; But only if there are characters to read during a very short time.
868 ;; Returns the last event, if any.
869 (defun viper-envelop-ESC-key ()
870 (let ((event last-input-event)
873 (if (viper-ESC-event-p event)
875 (if (viper-fast-keysequence-p)
877 (let (minor-mode-map-alist)
878 (viper-set-unread-command-events event)
881 (ad-get-orig-definition 'read-key-sequence) nil))
883 ;; If keyseq translates into something that still has ESC
884 ;; at the beginning, separate ESC from the rest of the seq.
885 ;; In XEmacs we check for events that are keypress meta-key
886 ;; and convert them into [escape key]
888 ;; This is needed for the following reason:
889 ;; If ESC is the first symbol, we interpret it as if the
890 ;; user typed ESC and then quickly some other symbols.
891 ;; If ESC is not the first one, then the key sequence
892 ;; entered was apparently translated into a function key or
893 ;; something (e.g., one may have
894 ;; (define-key function-key-map "\e[192z" [f11])
895 ;; which would translate the escape-sequence generated by
896 ;; f11 in an xterm window into the symbolic key f11.
898 ;; If `first-key' is not an ESC event, we make it into the
899 ;; last-command-event in order to pretend that this key was
900 ;; pressed. This is needed to allow arrow keys to be bound to
901 ;; macros. Otherwise, viper-exec-mapped-kbd-macro will think
902 ;; that the last event was ESC and so it'll execute whatever is
903 ;; bound to ESC. (Viper macros can't be bound to
905 (let* ((first-key (elt keyseq 0))
906 (key-mod (event-modifiers first-key)))
907 (cond ((and (viper-ESC-event-p first-key)
908 (not viper-translate-all-ESC-keysequences))
909 ;; put keys following ESC on the unread list
910 ;; and return ESC as the key-sequence
911 (viper-set-unread-command-events (subseq keyseq 1))
912 (setq last-input-event event
913 keyseq (if viper-emacs-p
915 (vector (character-to-event ?\e)))))
917 (key-press-event-p first-key)
918 (equal '(meta) key-mod))
919 (viper-set-unread-command-events
921 (character-to-event (event-key first-key)))
923 (setq last-input-event event
924 keyseq (vector (character-to-event ?\e))))
926 (setq last-command-event
927 (viper-copy-event first-key)))
931 ;; this is escape event with nothing after it
932 ;; put in unread-command-event and then re-read
933 (viper-set-unread-command-events event)
935 (funcall (ad-get-orig-definition 'read-key-sequence) nil))
937 ;; not an escape event
938 (setq keyseq (vector event)))
943 ;; Listen to ESC key.
944 ;; If a sequence of keys starting with ESC is issued with very short delays,
945 ;; interpret these keys in Emacs mode, so ESC won't be interpreted as a Vi key.
946 (defun viper-intercept-ESC-key ()
947 "Function that implements ESC key in Viper emulation of Vi."
949 (let ((cmd (or (key-binding (viper-envelop-ESC-key))
950 '(lambda () (interactive) (error "")))))
952 ;; call the actual function to execute ESC (if no other symbols followed)
953 ;; or the key bound to the ESC sequence (if the sequence was issued
954 ;; with very short delay between characters.
955 (if (eq cmd 'viper-intercept-ESC-key)
957 (cond ((eq viper-current-state 'vi-state)
959 ((eq viper-current-state 'insert-state)
960 'viper-exit-insert-state)
961 ((eq viper-current-state 'replace-state)
962 'viper-replace-state-exit-cmd)
963 (t 'viper-change-state-to-vi)
965 (call-interactively cmd)))
970 ;; prefix argument for Vi mode
972 ;; In Vi mode, prefix argument is a dotted pair (NUM . COM) where NUM
973 ;; represents the numeric value of the prefix argument and COM represents
974 ;; command prefix such as "c", "d", "m" and "y".
976 ;; Get value part of prefix-argument ARG.
977 (defsubst viper-p-val (arg)
980 (if (or (null (car arg)) (equal (car arg) '(nil)))
984 ;; Get raw value part of prefix-argument ARG.
985 (defsubst viper-P-val (arg)
986 (cond ((consp arg) (car arg))
989 ;; Get com part of prefix-argument ARG.
990 (defsubst viper-getcom (arg)
991 (cond ((null arg) nil)
992 ((consp arg) (cdr arg))
995 ;; Get com part of prefix-argument ARG and modify it.
996 (defun viper-getCom (arg)
997 (let ((com (viper-getcom arg)))
998 (cond ((viper= com ?c) ?c)
999 ;; Previously, ?c was being converted to ?C, but this prevented
1000 ;; multiline replace regions.
1001 ;;((viper= com ?c) ?C)
1002 ((viper= com ?d) ?D)
1003 ((viper= com ?y) ?Y)
1007 ;; Compute numeric prefix arg value.
1008 ;; Invoked by EVENT-CHAR. COM is the command part obtained so far.
1009 (defun viper-prefix-arg-value (event-char com)
1010 (let ((viper-intermediate-command 'viper-digit-argument)
1012 ;; read while number
1013 (while (and (viper-characterp event-char)
1014 (>= event-char ?0) (<= event-char ?9))
1015 (setq value (+ (* (if (integerp value) value 0) 10) (- event-char ?0)))
1016 (setq event-char (viper-read-event-convert-to-char)))
1018 (setq prefix-arg value)
1019 (if com (setq prefix-arg (cons prefix-arg com)))
1020 (while (eq event-char ?U)
1021 (viper-describe-arg prefix-arg)
1022 (setq event-char (viper-read-event-convert-to-char)))
1024 (if (or com (and (not (eq viper-current-state 'vi-state))
1025 ;; make sure it is a Vi command
1026 (viper-characterp event-char)
1027 (viper-vi-command-p event-char)
1029 ;; If appears to be one of the vi commands,
1030 ;; then execute it with funcall and clear prefix-arg in order to not
1031 ;; confuse subsequent commands
1033 ;; last-command-char is the char we want emacs to think was typed
1034 ;; last. If com is not nil, the viper-digit-argument command was
1035 ;; called from within viper-prefix-arg command, such as `d', `w',
1036 ;; etc., i.e., the user typed, say, d2. In this case, `com' would be
1037 ;; `d', `w', etc. If viper-digit-argument was invoked by
1038 ;; viper-escape-to-vi (which is indicated by the fact that the
1039 ;; current state is not vi-state), then `event-char' represents the
1040 ;; vi command to be executed (e.g., `d', `w', etc). Again,
1041 ;; last-command-char must make emacs believe that this is the command
1043 (cond ((eq event-char 'return) (setq event-char ?\C-m))
1044 ((eq event-char 'delete) (setq event-char ?\C-?))
1045 ((eq event-char 'backspace) (setq event-char ?\C-h))
1046 ((eq event-char 'space) (setq event-char ?\ )))
1047 (setq last-command-char (or com event-char))
1048 (setq func (viper-exec-form-in-vi
1049 `(key-binding (char-to-string ,event-char))))
1050 (funcall func prefix-arg)
1051 (setq prefix-arg nil))
1052 ;; some other command -- let emacs do it in its own way
1053 (viper-set-unread-command-events event-char))
1057 ;; Vi operator as prefix argument."
1058 (defun viper-prefix-arg-com (char value com)
1063 (viper-memq-char char
1064 (list ?c ?d ?y ?! ?< ?> ?= ?# ?r ?R ?\"
1065 viper-buffer-search-char)))
1067 ;; this means that we already have a command character, so we
1068 ;; construct a com list and exit while. however, if char is "
1071 ;; new com is (CHAR . OLDCOM)
1072 (if (viper-memq-char char '(?# ?\")) (error ""))
1073 (setq com (cons char com))
1075 ;; If com is nil we set com as char, and read more. Again, if char is
1076 ;; ", we read the name of register and store it in viper-use-register.
1077 ;; if char is !, =, or #, a complete com is formed so we exit the while
1079 (cond ((viper-memq-char char '(?! ?=))
1081 (setq char (read-char))
1084 ;; read a char and encode it as com
1085 (setq com (+ 128 (read-char)))
1086 (setq char (read-char)))
1088 (let ((reg (read-char)))
1089 (if (viper-valid-register reg)
1090 (setq viper-use-register reg)
1092 (setq char (read-char))))
1095 (setq char (read-char))))))
1098 ;; `com' is a single char, so we construct the command argument
1099 ;; and if `char' is `?', we describe the arg; otherwise
1100 ;; we prepare the command that will be executed at the end.
1102 (setq cmd-info (cons value com))
1103 (while (viper= char ?U)
1104 (viper-describe-arg cmd-info)
1105 (setq char (read-char)))
1106 ;; `char' is a movement cmd, a digit arg cmd, or a register cmd---so we
1107 ;; execute it at the very end
1108 (or (viper-movement-command-p char)
1109 (viper-digit-command-p char)
1110 (viper-regsuffix-command-p char)
1111 (viper= char ?!) ; bang command
1113 (setq cmd-to-exec-at-end
1114 (viper-exec-form-in-vi
1115 `(key-binding (char-to-string ,char)))))
1117 ;; as com is non-nil, this means that we have a command to execute
1118 (if (viper-memq-char (car com) '(?r ?R))
1119 ;; execute apropriate region command.
1120 (let ((char (car com)) (com (cdr com)))
1121 (setq prefix-arg (cons value com))
1122 (if (viper= char ?r) (viper-region prefix-arg)
1123 (viper-Region prefix-arg))
1125 (setq prefix-arg nil))
1126 ;; otherwise, reset prefix arg and call appropriate command
1127 (setq value (if (null value) 1 value))
1128 (setq prefix-arg nil)
1130 ;; If we change ?C to ?c here, then cc will enter replacement mode
1131 ;; rather than deleting lines. However, it will affect 1 less line than
1132 ;; normal. We decided to not use replacement mode here and follow Vi,
1133 ;; since replacement mode on n full lines can be achieved with nC.
1134 ((equal com '(?c . ?c)) (viper-line (cons value ?C)))
1135 ((equal com '(?d . ?d)) (viper-line (cons value ?D)))
1136 ((equal com '(?d . ?y)) (viper-yank-defun))
1137 ((equal com '(?y . ?y)) (viper-line (cons value ?Y)))
1138 ((equal com '(?< . ?<)) (viper-line (cons value ?<)))
1139 ((equal com '(?> . ?>)) (viper-line (cons value ?>)))
1140 ((equal com '(?! . ?!)) (viper-line (cons value ?!)))
1141 ((equal com '(?= . ?=)) (viper-line (cons value ?=)))
1144 (if cmd-to-exec-at-end
1146 (setq last-command-char char)
1147 (setq last-command-event
1149 (if viper-xemacs-p (character-to-event char) char)))
1151 (funcall cmd-to-exec-at-end cmd-info)
1156 (defun viper-describe-arg (arg)
1158 (setq val (viper-P-val arg)
1159 com (viper-getcom arg))
1162 (message "Value is nil, and command is nil")
1163 (message "Value is nil, and command is `%c'" com))
1165 (message "Value is `%d', and command is nil" val)
1166 (message "Value is `%d', and command is `%c'" val com)))))
1168 (defun viper-digit-argument (arg)
1169 "Begin numeric argument for the next command."
1171 (viper-leave-region-active)
1172 (viper-prefix-arg-value
1173 last-command-char (if (consp arg) (cdr arg) nil)))
1175 (defun viper-command-argument (arg)
1176 "Accept a motion command as an argument."
1178 (let ((viper-intermediate-command 'viper-command-argument))
1180 (viper-prefix-arg-com
1182 (cond ((null arg) nil)
1183 ((consp arg) (car arg))
1184 ((integerp arg) arg)
1185 (t (error viper-InvalidCommandArgument)))
1186 (cond ((null arg) nil)
1187 ((consp arg) (cdr arg))
1188 ((integerp arg) nil)
1189 (t (error viper-InvalidCommandArgument))))
1190 (quit (setq viper-use-register nil)
1191 (signal 'quit nil)))
1192 (viper-deactivate-mark)))
1195 ;; repeat last destructive command
1197 ;; Append region to text in register REG.
1198 ;; START and END are buffer positions indicating what to append.
1199 (defsubst viper-append-to-register (reg start end)
1200 (set-register reg (concat (if (stringp (get-register reg))
1201 (get-register reg) "")
1202 (buffer-substring start end))))
1204 ;; Saves last inserted text for possible use by viper-repeat command.
1205 (defun viper-save-last-insertion (beg end)
1207 (setq viper-last-insertion (buffer-substring beg end))
1209 ;; beg or end marker are somehow screwed up
1210 (setq viper-last-insertion nil)))
1211 (setq viper-last-insertion (buffer-substring beg end))
1212 (or (< (length viper-d-com) 5)
1213 (setcar (nthcdr 4 viper-d-com) viper-last-insertion))
1214 (or (null viper-command-ring)
1215 (ring-empty-p viper-command-ring)
1217 (setcar (nthcdr 4 (viper-current-ring-item viper-command-ring))
1218 viper-last-insertion)
1219 ;; del most recent elt, if identical to the second most-recent
1220 (viper-cleanup-ring viper-command-ring)))
1223 (defsubst viper-yank-last-insertion ()
1224 "Inserts the text saved by the previous viper-save-last-insertion command."
1226 (insert viper-last-insertion)
1230 ;; define functions to be executed
1232 ;; invoked by the `C' command
1233 (defun viper-exec-change (m-com com)
1234 (or (and (markerp viper-com-point) (marker-position viper-com-point))
1235 (set-marker viper-com-point (point) (current-buffer)))
1236 ;; handle C cmd at the eol and at eob.
1237 (if (or (and (eolp) (= viper-com-point (point)))
1238 (= viper-com-point (point-max)))
1240 (insert " ")(backward-char 1)))
1241 (if (= viper-com-point (point))
1242 (viper-forward-char-carefully))
1243 (set-mark viper-com-point)
1244 (if (eq m-com 'viper-next-line-at-bol)
1245 (viper-enlarge-region (mark t) (point)))
1246 (if (< (point) (mark t))
1247 (exchange-point-and-mark))
1248 (if (eq (preceding-char) ?\n)
1249 (viper-backward-char-carefully)) ; give back the newline
1251 (viper-change (mark t) (point))
1252 (viper-change-subr (mark t) (point))))
1254 ;; this is invoked by viper-substitute-line
1255 (defun viper-exec-Change (m-com com)
1257 (set-mark viper-com-point)
1258 (viper-enlarge-region (mark t) (point))
1259 (if viper-use-register
1261 (cond ((viper-valid-register viper-use-register '(letter digit))
1263 viper-use-register (mark t) (point) nil))
1264 ((viper-valid-register viper-use-register '(Letter))
1265 (viper-append-to-register
1266 (downcase viper-use-register) (mark t) (point)))
1267 (t (setq viper-use-register nil)
1268 (error viper-InvalidRegister viper-use-register)))
1269 (setq viper-use-register nil)))
1270 (delete-region (mark t) (point)))
1273 (viper-change-state-to-insert)
1274 (viper-yank-last-insertion)))
1276 (defun viper-exec-delete (m-com com)
1277 (or (and (markerp viper-com-point) (marker-position viper-com-point))
1278 (set-marker viper-com-point (point) (current-buffer)))
1279 (let (chars-deleted)
1280 (if viper-use-register
1282 (cond ((viper-valid-register viper-use-register '(letter digit))
1284 viper-use-register viper-com-point (point) nil))
1285 ((viper-valid-register viper-use-register '(Letter))
1286 (viper-append-to-register
1287 (downcase viper-use-register) viper-com-point (point)))
1288 (t (setq viper-use-register nil)
1289 (error viper-InvalidRegister viper-use-register)))
1290 (setq viper-use-register nil)))
1292 (if (eq last-command 'd-command) 'kill-region nil))
1293 (setq chars-deleted (abs (- (point) viper-com-point)))
1294 (if (> chars-deleted viper-change-notification-threshold)
1295 (message "Deleted %d characters" chars-deleted))
1296 (kill-region viper-com-point (point))
1297 (setq this-command 'd-command)
1298 (if viper-ex-style-motion
1299 (if (and (eolp) (not (bolp))) (backward-char 1)))))
1301 (defun viper-exec-Delete (m-com com)
1303 (set-mark viper-com-point)
1304 (viper-enlarge-region (mark t) (point))
1305 (let (lines-deleted)
1306 (if viper-use-register
1308 (cond ((viper-valid-register viper-use-register '(letter digit))
1310 viper-use-register (mark t) (point) nil))
1311 ((viper-valid-register viper-use-register '(Letter))
1312 (viper-append-to-register
1313 (downcase viper-use-register) (mark t) (point)))
1314 (t (setq viper-use-register nil)
1315 (error viper-InvalidRegister viper-use-register)))
1316 (setq viper-use-register nil)))
1318 (if (eq last-command 'D-command) 'kill-region nil))
1319 (setq lines-deleted (count-lines (point) viper-com-point))
1320 (if (> lines-deleted viper-change-notification-threshold)
1321 (message "Deleted %d lines" lines-deleted))
1322 (kill-region (mark t) (point))
1323 (if (eq m-com 'viper-line) (setq this-command 'D-command)))
1324 (back-to-indentation)))
1327 (defun viper-exec-yank (m-com com)
1328 (or (and (markerp viper-com-point) (marker-position viper-com-point))
1329 (set-marker viper-com-point (point) (current-buffer)))
1331 (if viper-use-register
1333 (cond ((viper-valid-register viper-use-register '(letter digit))
1335 viper-use-register viper-com-point (point) nil))
1336 ((viper-valid-register viper-use-register '(Letter))
1337 (viper-append-to-register
1338 (downcase viper-use-register) viper-com-point (point)))
1339 (t (setq viper-use-register nil)
1340 (error viper-InvalidRegister viper-use-register)))
1341 (setq viper-use-register nil)))
1342 (setq last-command nil)
1343 (copy-region-as-kill viper-com-point (point))
1344 (setq chars-saved (abs (- (point) viper-com-point)))
1345 (if (> chars-saved viper-change-notification-threshold)
1346 (message "Saved %d characters" chars-saved))
1347 (goto-char viper-com-point)))
1350 (defun viper-exec-Yank (m-com com)
1352 (set-mark viper-com-point)
1353 (viper-enlarge-region (mark t) (point))
1355 (if viper-use-register
1357 (cond ((viper-valid-register viper-use-register '(letter digit))
1359 viper-use-register (mark t) (point) nil))
1360 ((viper-valid-register viper-use-register '(Letter))
1361 (viper-append-to-register
1362 (downcase viper-use-register) (mark t) (point)))
1363 (t (setq viper-use-register nil)
1364 (error viper-InvalidRegister viper-use-register)))
1365 (setq viper-use-register nil)))
1366 (setq last-command nil)
1367 (copy-region-as-kill (mark t) (point))
1368 (setq lines-saved (count-lines (mark t) (point)))
1369 (if (> lines-saved viper-change-notification-threshold)
1370 (message "Saved %d lines" lines-saved))))
1371 (viper-deactivate-mark)
1372 (goto-char viper-com-point))
1374 (defun viper-exec-bang (m-com com)
1376 (set-mark viper-com-point)
1377 (viper-enlarge-region (mark t) (point))
1378 (exchange-point-and-mark)
1379 (shell-command-on-region
1382 (setq viper-last-shell-com
1383 (viper-read-string-with-history
1386 'viper-shell-history
1387 (car viper-shell-history)
1389 viper-last-shell-com)
1392 (defun viper-exec-equals (m-com com)
1394 (set-mark viper-com-point)
1395 (viper-enlarge-region (mark t) (point))
1396 (if (> (mark t) (point)) (exchange-point-and-mark))
1397 (indent-region (mark t) (point) nil)))
1399 (defun viper-exec-shift (m-com com)
1401 (set-mark viper-com-point)
1402 (viper-enlarge-region (mark t) (point))
1403 (if (> (mark t) (point)) (exchange-point-and-mark))
1404 (indent-rigidly (mark t) (point)
1407 (- viper-shift-width))))
1408 ;; return point to where it was before shift
1409 (goto-char viper-com-point))
1411 ;; this is needed because some commands fake com by setting it to ?r, which
1412 ;; denotes repeated insert command.
1413 (defsubst viper-exec-dummy (m-com com)
1416 (defun viper-exec-buffer-search (m-com com)
1417 (setq viper-s-string (buffer-substring (point) viper-com-point))
1418 (setq viper-s-forward t)
1419 (setq viper-search-history (cons viper-s-string viper-search-history))
1420 (setq viper-intermediate-command 'viper-exec-buffer-search)
1421 (viper-search viper-s-string viper-s-forward 1))
1423 (defvar viper-exec-array (make-vector 128 nil))
1425 ;; Using a dispatch array allows adding functions like buffer search
1426 ;; without affecting other functions. Buffer search can now be bound
1427 ;; to any character.
1429 (aset viper-exec-array ?c 'viper-exec-change)
1430 (aset viper-exec-array ?C 'viper-exec-Change)
1431 (aset viper-exec-array ?d 'viper-exec-delete)
1432 (aset viper-exec-array ?D 'viper-exec-Delete)
1433 (aset viper-exec-array ?y 'viper-exec-yank)
1434 (aset viper-exec-array ?Y 'viper-exec-Yank)
1435 (aset viper-exec-array ?r 'viper-exec-dummy)
1436 (aset viper-exec-array ?! 'viper-exec-bang)
1437 (aset viper-exec-array ?< 'viper-exec-shift)
1438 (aset viper-exec-array ?> 'viper-exec-shift)
1439 (aset viper-exec-array ?= 'viper-exec-equals)
1443 ;; This function is called by various movement commands to execute a
1444 ;; destructive command on the region specified by the movement command. For
1445 ;; instance, if the user types cw, then the command viper-forward-word will
1446 ;; call viper-execute-com to execute viper-exec-change, which eventually will
1447 ;; call viper-change to invoke the replace mode on the region.
1449 ;; The var viper-d-com is set to (M-COM VAL COM REG INSETED-TEXT COMMAND-KEYS)
1450 ;; via a call to viper-set-destructive-command, for later use by viper-repeat.
1451 (defun viper-execute-com (m-com val com)
1452 (let ((reg viper-use-register))
1453 ;; this is the special command `#'
1455 (viper-special-prefix-com (- com 128))
1456 (let ((fn (aref viper-exec-array (if (< com 0) (- com) com))))
1458 (error "%c: %s" com viper-InvalidViCommand)
1459 (funcall fn m-com com))))
1460 (if (viper-dotable-command-p com)
1461 (viper-set-destructive-command
1463 (if (viper-memq-char com (list ?c ?C ?!)) (- com) com)
1468 (defun viper-repeat (arg)
1469 "Re-execute last destructive command.
1470 Use the info in viper-d-com, which has the form
1471 \(com val ch reg inserted-text command-keys\),
1472 where `com' is the command to be re-executed, `val' is the
1473 argument to `com', `ch' is a flag for repeat, and `reg' is optional;
1474 if it exists, it is the name of the register for `com'.
1475 If the prefix argument, ARG, is non-nil, it is used instead of `val'."
1477 (let ((save-point (point)) ; save point before repeating prev cmd
1478 ;; Pass along that we are repeating a destructive command
1479 ;; This tells viper-set-destructive-command not to update
1480 ;; viper-command-ring
1481 (viper-intermediate-command 'viper-repeat))
1482 (if (eq last-command 'viper-undo)
1483 ;; if the last command was viper-undo, then undo-more
1485 ;; otherwise execute the command stored in viper-d-com. if arg is
1486 ;; non-nil its prefix value is used as new prefix value for the command.
1487 (let ((m-com (car viper-d-com))
1488 (val (viper-P-val arg))
1489 (com (nth 2 viper-d-com))
1490 (reg (nth 3 viper-d-com)))
1491 (if (null val) (setq val (nth 1 viper-d-com)))
1492 (if (null m-com) (error "No previous command to repeat."))
1493 (setq viper-use-register reg)
1494 (if (nth 4 viper-d-com) ; text inserted by command
1495 (setq viper-last-insertion (nth 4 viper-d-com)
1496 viper-d-char (nth 4 viper-d-com)))
1497 (funcall m-com (cons val com))
1498 (cond ((and (< save-point (point)) viper-keep-point-on-repeat)
1499 (goto-char save-point)) ; go back to before repeat.
1500 ((and (< save-point (point)) viper-ex-style-editing)
1501 (or (bolp) (backward-char 1))))
1502 (if (and (eolp) (not (bolp)))
1505 (viper-adjust-undo) ; take care of undo
1506 ;; If the prev cmd was rotating the command ring, this means that `.' has
1507 ;; just executed a command from that ring. So, push it on the ring again.
1508 ;; If we are just executing previous command , then don't push viper-d-com
1509 ;; because viper-d-com is not fully constructed in this case (its keys and
1510 ;; the inserted text may be nil). Besides, in this case, the command
1511 ;; executed by `.' is already on the ring.
1512 (if (eq last-command 'viper-display-current-destructive-command)
1513 (viper-push-onto-ring viper-d-com 'viper-command-ring))
1514 (viper-deactivate-mark)
1517 (defun viper-repeat-from-history ()
1518 "Repeat a destructive command from history.
1519 Doesn't change viper-command-ring in any way, so `.' will work as before
1520 executing this command.
1521 This command is supposed to be bound to a two-character Vi macro where
1522 the second character is a digit 0 to 9. The digit indicates which
1523 history command to execute. `<char>0' is equivalent to `.', `<char>1'
1524 invokes the command before that, etc."
1526 (let* ((viper-intermediate-command 'repeating-display-destructive-command)
1527 (idx (cond (viper-this-kbd-macro
1529 (symbol-name (elt viper-this-kbd-macro 1))))
1532 (viper-d-com viper-d-com))
1534 (or (and (numberp num) (<= 0 num) (<= num 9))
1539 "`viper-repeat-from-history' must be invoked as a Vi macro bound to `<key><digit>'")))
1541 (setq viper-d-com (viper-special-ring-rotate1 viper-command-ring -1))
1542 (setq num (1- num)))
1545 (viper-special-ring-rotate1 viper-command-ring 1)
1546 (setq num (1+ num)))
1550 ;; The hash-command. It is invoked interactively by the key sequence #<char>.
1551 ;; The chars that can follow `#' are determined by viper-hash-command-p
1552 (defun viper-special-prefix-com (char)
1553 (cond ((viper= char ?c)
1554 (downcase-region (min viper-com-point (point))
1555 (max viper-com-point (point))))
1557 (upcase-region (min viper-com-point (point))
1558 (max viper-com-point (point))))
1560 (push-mark viper-com-point t)
1561 (viper-global-execute))
1563 (push-mark viper-com-point t)
1564 (viper-quote-region))
1566 (funcall viper-spell-function viper-com-point (point)))
1567 (t (error "#%c: %s" char viper-InvalidViCommand))))
1572 (defun viper-undo ()
1573 "Undo previous change."
1576 (let ((modified (buffer-modified-p))
1577 (before-undo-pt (point-marker))
1578 (after-change-functions after-change-functions)
1579 undo-beg-posn undo-end-posn)
1581 ;; no need to remove this hook, since this var has scope inside a let.
1582 (add-hook 'after-change-functions
1583 '(lambda (beg end len)
1584 (setq undo-beg-posn beg
1585 undo-end-posn (or end beg))))
1589 (setq undo-beg-posn (or undo-beg-posn before-undo-pt)
1590 undo-end-posn (or undo-end-posn undo-beg-posn))
1592 (goto-char undo-beg-posn)
1594 (if (and viper-keep-point-on-undo
1595 (pos-visible-in-window-p before-undo-pt))
1597 (push-mark (point-marker) t)
1598 (viper-sit-for-short 300)
1599 (goto-char undo-end-posn)
1600 (viper-sit-for-short 300)
1601 (if (and (> (viper-chars-in-region undo-beg-posn before-undo-pt) 1)
1602 (> (viper-chars-in-region undo-end-posn before-undo-pt) 1))
1603 (goto-char before-undo-pt)
1604 (goto-char undo-beg-posn)))
1605 (push-mark before-undo-pt t))
1606 (if (and (eolp) (not (bolp))) (backward-char 1))
1607 (if (not modified) (set-buffer-modified-p t)))
1608 (setq this-command 'viper-undo))
1610 ;; Continue undoing previous changes.
1611 (defun viper-undo-more ()
1612 (message "undo more!")
1616 (message "No further undo information in this buffer")))
1617 (if (and (eolp) (not (bolp))) (backward-char 1))
1618 (setq this-command 'viper-undo))
1620 ;; The following two functions are used to set up undo properly.
1621 ;; In VI, unlike Emacs, if you open a line, say, and add a bunch of lines,
1622 ;; they are undone all at once.
1623 (defun viper-adjust-undo ()
1624 (if viper-undo-needs-adjustment
1625 (let ((inhibit-quit t)
1627 (setq viper-undo-needs-adjustment nil)
1628 (if (listp buffer-undo-list)
1629 (if (setq tmp (memq viper-buffer-undo-list-mark buffer-undo-list))
1631 (setq tmp2 (cdr tmp)) ; the part after mark
1633 ;; cut tail from buffer-undo-list temporarily by direct
1634 ;; manipulation with pointers in buffer-undo-list
1637 (setq buffer-undo-list (delq nil buffer-undo-list))
1638 (setq buffer-undo-list
1639 (delq viper-buffer-undo-list-mark buffer-undo-list))
1640 ;; restore tail of buffer-undo-list
1641 (setq buffer-undo-list (nconc buffer-undo-list tmp2)))
1642 (setq buffer-undo-list (delq nil buffer-undo-list)))))
1646 (defun viper-set-complex-command-for-undo ()
1647 (if (listp buffer-undo-list)
1648 (if (not viper-undo-needs-adjustment)
1649 (let ((inhibit-quit t))
1650 (setq buffer-undo-list
1651 (cons viper-buffer-undo-list-mark buffer-undo-list))
1652 (setq viper-undo-needs-adjustment t)))))
1657 (defun viper-display-current-destructive-command ()
1658 (let ((text (nth 4 viper-d-com))
1659 (keys (nth 5 viper-d-com))
1662 (setq this-command 'viper-display-current-destructive-command)
1664 (message " `.' runs %s%s"
1665 (concat "`" (viper-array-to-string keys) "'")
1666 (viper-abbreviate-string
1669 (cond ((characterp text) (char-to-string text))
1670 ((stringp text) text)
1675 " inserting `" "'" " ......."))
1679 ;; don't change viper-d-com if it was viper-repeat command invoked with `.'
1680 ;; or in some other way (non-interactively).
1681 (defun viper-set-destructive-command (list)
1682 (or (eq viper-intermediate-command 'viper-repeat)
1684 (setq viper-d-com list)
1685 (setcar (nthcdr 5 viper-d-com)
1686 (viper-array-to-string (if (arrayp viper-this-command-keys)
1687 viper-this-command-keys
1688 (this-command-keys))))
1689 (viper-push-onto-ring viper-d-com 'viper-command-ring)))
1690 (setq viper-this-command-keys nil))
1693 (defun viper-prev-destructive-command (next)
1694 "Find previous destructive command in the history of destructive commands.
1695 With prefix argument, find next destructive command."
1697 (let (cmd viper-intermediate-command)
1698 (if (eq last-command 'viper-display-current-destructive-command)
1699 ;; repeated search through command history
1700 (setq viper-intermediate-command
1701 'repeating-display-destructive-command)
1702 ;; first search through command history--set temp ring
1703 (setq viper-temp-command-ring (copy-list viper-command-ring)))
1705 (viper-special-ring-rotate1 viper-temp-command-ring 1)
1706 (viper-special-ring-rotate1 viper-temp-command-ring -1)))
1709 (setq viper-d-com cmd))
1710 (viper-display-current-destructive-command)))
1713 (defun viper-next-destructive-command ()
1714 "Find next destructive command in the history of destructive commands."
1716 (viper-prev-destructive-command 'next))
1719 (defun viper-insert-prev-from-insertion-ring (arg)
1720 "Cycle through insertion ring in the direction of older insertions.
1721 Undoes previous insertion and inserts new.
1722 With prefix argument, cycles in the direction of newer elements.
1723 In minibuffer, this command executes whatever the invocation key is bound
1724 to in the global map, instead of cycling through the insertion ring."
1726 (let (viper-intermediate-command)
1727 (if (eq last-command 'viper-insert-from-insertion-ring)
1728 (progn ; repeated search through insertion history
1729 (setq viper-intermediate-command 'repeating-insertion-from-ring)
1730 (if (eq viper-current-state 'replace-state)
1732 (if viper-last-inserted-string-from-insertion-ring
1733 (backward-delete-char
1734 (length viper-last-inserted-string-from-insertion-ring))))
1736 ;;first search through insertion history
1737 (setq viper-temp-insertion-ring (copy-list viper-insertion-ring)))
1738 (setq this-command 'viper-insert-from-insertion-ring)
1739 ;; so that things will be undone properly
1740 (setq buffer-undo-list (cons nil buffer-undo-list))
1741 (setq viper-last-inserted-string-from-insertion-ring
1742 (viper-special-ring-rotate1 viper-temp-insertion-ring (if arg 1 -1)))
1744 ;; this change of viper-intermediate-command must come after
1745 ;; viper-special-ring-rotate1, so that the ring will rotate, but before the
1747 (setq viper-intermediate-command nil)
1748 (if viper-last-inserted-string-from-insertion-ring
1749 (insert viper-last-inserted-string-from-insertion-ring))
1752 (defun viper-insert-next-from-insertion-ring ()
1753 "Cycle through insertion ring in the direction of older insertions.
1754 Undo previous insertion and inserts new."
1756 (viper-insert-prev-from-insertion-ring 'next))
1760 ;; some region utilities
1762 ;; If at the last line of buffer, add \\n before eob, if newline is missing.
1763 (defun viper-add-newline-at-eob-if-necessary ()
1766 ;; make sure all lines end with newline, unless in the minibuffer or
1767 ;; when requested otherwise (require-final-newline is nil)
1770 require-final-newline
1771 (not (viper-is-in-minibuffer))
1772 (not buffer-read-only))
1775 (defun viper-yank-defun ()
1777 (copy-region-as-kill (point) (mark t)))
1779 ;; Enlarge region between BEG and END.
1780 (defun viper-enlarge-region (beg end)
1781 (or beg (setq beg end)) ; if beg is nil, set to end
1782 (or end (setq end beg)) ; if end is nil, set to beg
1785 (progn (goto-char beg) (set-mark end))
1789 (exchange-point-and-mark)
1790 (if (or (not (eobp)) (not (bolp))) (forward-line 1))
1791 (if (not (eobp)) (beginning-of-line))
1792 (if (> beg end) (exchange-point-and-mark)))
1795 ;; Quote region by each line with a user supplied string.
1796 (defun viper-quote-region ()
1797 (let ((quote-str viper-quote-string)
1798 (donot-change-dafault t))
1800 (viper-read-string-with-history
1803 'viper-quote-region-history
1804 (cond ((string-match "tex.*-mode" (symbol-name major-mode)) "%%")
1805 ((string-match "java.*-mode" (symbol-name major-mode)) "//")
1806 ((string-match "perl.*-mode" (symbol-name major-mode)) "#")
1807 ((string-match "lisp.*-mode" (symbol-name major-mode)) ";;")
1808 ((memq major-mode '(c-mode cc-mode c++-mode)) "//")
1809 ((memq major-mode '(sh-mode shell-mode)) "#")
1810 (t (setq donot-change-dafault nil)
1812 (or donot-change-dafault
1813 (setq viper-quote-string quote-str))
1814 (viper-enlarge-region (point) (mark t))
1815 (if (> (point) (mark t)) (exchange-point-and-mark))
1819 (while (and (< (point) (mark t)) (bolp))
1824 ;; Tells whether BEG is on the same line as END.
1825 ;; If one of the args is nil, it'll return nil.
1826 (defun viper-same-line (beg end)
1827 (let ((selective-display nil)
1830 (if (and beg end (> beg end))
1835 (cond ((or (> beg (point-max)) (> end (point-max))) ; out of range
1838 ;; This 'if' is needed because Emacs treats the next empty line
1839 ;; as part of the previous line.
1840 (if (= (viper-line-pos 'start) end)
1842 (<= (+ incr (count-lines beg end)) 1))))
1846 ;; Check if the string ends with a newline.
1847 (defun viper-end-with-a-newline-p (string)
1848 (or (string= string "")
1849 (= (viper-seq-last-elt string) ?\n)))
1851 (defun viper-tmp-insert-at-eob (msg)
1852 (let ((savemax (point-max)))
1856 (goto-char savemax) (delete-region (point) (point-max))
1861 ;;; Minibuffer business
1863 (defsubst viper-set-minibuffer-style ()
1864 (add-hook 'minibuffer-setup-hook 'viper-minibuffer-setup-sentinel))
1867 (defun viper-minibuffer-setup-sentinel ()
1868 (let ((hook (if viper-vi-style-in-minibuffer
1869 'viper-change-state-to-insert
1870 'viper-change-state-to-emacs)))
1874 ;; Thie is a temp hook that uses free variables init-message and initial.
1875 ;; A dirty feature, but it is the simplest way to have it do the right thing.
1876 ;; The INIT-MESSAGE and INITIAL vars come from the scope set by
1877 ;; viper-read-string-with-history
1878 (defun viper-minibuffer-standard-hook ()
1879 (if (stringp init-message)
1880 (viper-tmp-insert-at-eob init-message))
1881 (if (stringp initial)
1883 ;; don't wait if we have unread events or in kbd macro
1884 (or unread-command-events
1887 (if (fboundp 'minibuffer-prompt-end)
1888 (delete-region (minibuffer-prompt-end) (point-max))
1891 (viper-minibuffer-setup-sentinel))
1893 (defsubst viper-minibuffer-real-start ()
1894 (if (fboundp 'minibuffer-prompt-end)
1895 (minibuffer-prompt-end)
1899 ;; Interpret last event in the local map first; if fails, use exit-minibuffer.
1900 ;; Run viper-minibuffer-exit-hook before exiting.
1901 (defun viper-exit-minibuffer ()
1902 "Exit minibuffer Viper way."
1905 (setq command (local-key-binding (char-to-string last-command-char)))
1906 (run-hooks 'viper-minibuffer-exit-hook)
1908 (command-execute command)
1909 (exit-minibuffer))))
1912 (defcustom viper-smart-suffix-list
1913 '("" "tex" "c" "cc" "C" "java" "el" "html" "htm" "xml"
1914 "pl" "flr" "P" "p" "h" "H")
1915 "*List of suffixes that Viper tries to append to filenames ending with a `.'.
1916 This is useful when you the current directory contains files with the same
1917 prefix and many different suffixes. Usually, only one of the suffixes
1918 represents an editable file. However, file completion will stop at the `.'
1919 The smart suffix feature lets you hit RET in such a case, and Viper will
1920 select the appropriate suffix.
1922 Suffixes are tried in the order given and the first suffix for which a
1923 corresponding file exists is selected. If no file exists for any of the
1924 suffixes, the user is asked to confirm.
1926 To turn this feature off, set this variable to nil."
1927 :type '(repeat string)
1931 ;; Try to add a suitable suffix to files whose name ends with a `.'
1932 ;; Useful when the user hits RET on a non-completed file name.
1933 ;; Used as a minibuffer exit hook in read-file-name
1934 (defun viper-file-add-suffix ()
1936 (len (length viper-smart-suffix-list))
1937 (file (buffer-substring-no-properties
1938 (viper-minibuffer-real-start) (point-max)))
1940 (goto-char (point-max))
1941 (if (and viper-smart-suffix-list (string-match "\\.$" file))
1943 (while (and (not found) (< count len))
1944 (setq suff (nth count viper-smart-suffix-list)
1947 (format "%s%s" (substitute-in-file-name file) suff))
1954 (viper-tmp-insert-at-eob " [Please complete file name]")
1956 (while (not (memq cmd
1957 '(exit-minibuffer viper-exit-minibuffer)))
1959 (key-binding (setq key (read-key-sequence nil))))
1960 (cond ((eq cmd 'self-insert-command)
1962 (insert (events-to-keys key))
1964 ((memq cmd '(exit-minibuffer viper-exit-minibuffer))
1966 (t (command-execute cmd)))
1971 (defun viper-minibuffer-trim-tail ()
1972 "Delete junk at the end of the first line of the minibuffer input.
1973 Remove this function from `viper-minibuffer-exit-hook', if this causes
1975 (if (viper-is-in-minibuffer)
1977 (goto-char (viper-minibuffer-real-start))
1979 (delete-region (point) (point-max)))))
1982 ;;; Reading string with history
1984 (defun viper-read-string-with-history (prompt &optional initial
1985 history-var default keymap
1987 ;; Read string, prompting with PROMPT and inserting the INITIAL
1988 ;; value. Uses HISTORY-VAR. DEFAULT is the default value to accept if the
1989 ;; input is an empty string.
1990 ;; Default value is displayed until the user types something in the
1992 ;; KEYMAP is used, if given, instead of minibuffer-local-map.
1993 ;; INIT-MESSAGE is the message temporarily displayed after entering the
1995 (let ((minibuffer-setup-hook 'viper-minibuffer-standard-hook)
2000 (setq keymap (or keymap minibuffer-local-map)
2001 initial (or initial "")
2002 temp-msg (if default
2003 (format "(default: %s) " default)
2006 (setq viper-incomplete-ex-cmd nil)
2007 (setq val (read-from-minibuffer prompt
2008 (concat temp-msg initial val padding)
2009 keymap nil history-var))
2010 (setq minibuffer-setup-hook nil
2011 padding (viper-array-to-string (this-command-keys))
2013 ;; the following tries to be smart about what to put in history
2014 (if (not (string= val (car (eval history-var))))
2015 (set history-var (cons val (eval history-var))))
2016 (if (or (string= (nth 0 (eval history-var)) (nth 1 (eval history-var)))
2017 (string= (nth 0 (eval history-var)) ""))
2018 (set history-var (cdr (eval history-var))))
2019 ;; If the user enters nothing but the prev cmd wasn't viper-ex,
2020 ;; viper-command-argument, or `! shell-command', this probably means
2021 ;; that the user typed something then erased. Return "" in this case, not
2022 ;; the default---the default is too confusing in this case.
2023 (cond ((and (string= val "")
2024 (not (string= prompt "!")) ; was a `! shell-command'
2025 (not (memq last-command
2027 viper-command-argument
2031 ((string= val "") (or default ""))
2037 ;; insertion commands
2039 ;; Called when state changes from Insert Vi command mode.
2040 ;; Repeats the insertion command if Insert state was entered with prefix
2042 (defun viper-repeat-insert-command ()
2043 (let ((i-com (car viper-d-com))
2044 (val (nth 1 viper-d-com))
2045 (char (nth 2 viper-d-com)))
2046 (if (and val (> val 1)) ; first check that val is non-nil
2048 (setq viper-d-com (list i-com (1- val) ?r nil nil nil))
2050 (setq viper-d-com (list i-com val char nil nil nil))
2053 (defun viper-insert (arg)
2054 "Insert before point."
2056 (viper-set-complex-command-for-undo)
2057 (let ((val (viper-p-val arg))
2058 (com (viper-getcom arg)))
2059 (viper-set-destructive-command (list 'viper-insert val ?r nil nil nil))
2061 (viper-loop val (viper-yank-last-insertion))
2062 (viper-change-state-to-insert))))
2064 (defun viper-append (arg)
2065 "Append after point."
2067 (viper-set-complex-command-for-undo)
2068 (let ((val (viper-p-val arg))
2069 (com (viper-getcom arg)))
2070 (viper-set-destructive-command (list 'viper-append val ?r nil nil nil))
2071 (if (not (eolp)) (forward-char))
2073 (viper-loop val (viper-yank-last-insertion))
2074 (viper-change-state-to-insert))))
2076 (defun viper-Append (arg)
2077 "Append at end of line."
2079 (viper-set-complex-command-for-undo)
2080 (let ((val (viper-p-val arg))
2081 (com (viper-getcom arg)))
2082 (viper-set-destructive-command (list 'viper-Append val ?r nil nil nil))
2085 (viper-loop val (viper-yank-last-insertion))
2086 (viper-change-state-to-insert))))
2088 (defun viper-Insert (arg)
2089 "Insert before first non-white."
2091 (viper-set-complex-command-for-undo)
2092 (let ((val (viper-p-val arg))
2093 (com (viper-getcom arg)))
2094 (viper-set-destructive-command (list 'viper-Insert val ?r nil nil nil))
2095 (back-to-indentation)
2097 (viper-loop val (viper-yank-last-insertion))
2098 (viper-change-state-to-insert))))
2100 (defun viper-open-line (arg)
2103 (viper-set-complex-command-for-undo)
2104 (let ((val (viper-p-val arg))
2105 (com (viper-getcom arg)))
2106 (viper-set-destructive-command (list 'viper-open-line val ?r nil nil nil))
2107 (let ((col (current-indentation)))
2112 (if viper-auto-indent
2115 (if viper-electric-mode
2116 (indent-according-to-mode)
2119 (viper-yank-last-insertion))
2122 (if viper-auto-indent
2125 (if viper-electric-mode
2126 (indent-according-to-mode)
2128 (viper-change-state-to-insert)))))
2130 (defun viper-Open-line (arg)
2133 (viper-set-complex-command-for-undo)
2134 (let ((val (viper-p-val arg))
2135 (com (viper-getcom arg)))
2136 (viper-set-destructive-command (list 'viper-Open-line val ?r nil nil nil))
2137 (let ((col (current-indentation)))
2142 (if viper-auto-indent
2145 (if viper-electric-mode
2146 (indent-according-to-mode)
2149 (viper-yank-last-insertion))
2152 (if viper-auto-indent
2155 (if viper-electric-mode
2156 (indent-according-to-mode)
2159 (viper-change-state-to-insert)))))
2161 (defun viper-open-line-at-point (arg)
2162 "Open line at point."
2164 (viper-set-complex-command-for-undo)
2165 (let ((val (viper-p-val arg))
2166 (com (viper-getcom arg)))
2167 (viper-set-destructive-command
2168 (list 'viper-open-line-at-point val ?r nil nil nil))
2172 (viper-yank-last-insertion))
2174 (viper-change-state-to-insert))))
2176 (defun viper-substitute (arg)
2177 "Substitute characters."
2179 (let ((val (viper-p-val arg))
2180 (com (viper-getcom arg)))
2184 (viper-change-subr (mark t) (point))
2185 (viper-change (mark t) (point)))
2186 (viper-set-destructive-command (list 'viper-substitute val ?r nil nil nil))
2189 ;; Command bound to S
2190 (defun viper-substitute-line (arg)
2193 (viper-set-complex-command-for-undo)
2194 (viper-line (cons arg ?C)))
2196 ;; Prepare for replace
2197 (defun viper-start-replace ()
2198 (setq viper-began-as-replace t
2199 viper-sitting-in-replace t
2200 viper-replace-chars-to-delete 0)
2202 'viper-after-change-functions 'viper-replace-mode-spy-after t 'local)
2204 'viper-before-change-functions 'viper-replace-mode-spy-before t 'local)
2205 ;; this will get added repeatedly, but no harm
2206 (add-hook 'after-change-functions 'viper-after-change-sentinel t)
2207 (add-hook 'before-change-functions 'viper-before-change-sentinel t)
2208 (viper-move-marker-locally
2209 'viper-last-posn-in-replace-region (viper-replace-start))
2211 'viper-post-command-hooks 'viper-replace-state-post-command-sentinel
2214 'viper-pre-command-hooks 'viper-replace-state-pre-command-sentinel t 'local)
2215 ;; guard against a smartie who switched from R-replace to normal replace
2217 'viper-post-command-hooks 'viper-R-state-post-command-sentinel 'local)
2218 (if overwrite-mode (overwrite-mode -1))
2222 (defun viper-replace-mode-spy-before (beg end)
2223 (setq viper-replace-region-chars-deleted (viper-chars-in-region beg end))
2226 ;; Invoked as an after-change-function to calculate how many chars have to be
2227 ;; deleted. This function may be called several times within a single command,
2228 ;; if this command performs several separate buffer changes. Therefore, if
2229 ;; adds up the number of chars inserted and subtracts the number of chars
2231 (defun viper-replace-mode-spy-after (beg end length)
2232 (if (memq viper-intermediate-command
2233 '(dabbrev-expand hippie-expand repeating-insertion-from-ring))
2234 ;; Take special care of text insertion from insertion ring inside
2235 ;; replacement overlays.
2237 (setq viper-replace-chars-to-delete 0)
2238 (viper-move-marker-locally
2239 'viper-last-posn-in-replace-region (point)))
2241 (let* ((real-end (min end (viper-replace-end)))
2242 (column-shift (- (save-excursion (goto-char real-end)
2244 (save-excursion (goto-char beg)
2249 (setq chars-deleted viper-replace-region-chars-deleted))
2250 (setq viper-replace-region-chars-deleted 0)
2251 (setq viper-replace-chars-to-delete
2252 (+ viper-replace-chars-to-delete
2254 ;; if column shift is bigger, due to a TAB insertion, take
2255 ;; column-shift instead of the number of inserted chars
2256 (max (viper-chars-in-region beg real-end)
2257 ;; This test accounts for Chinese/Japanese/... chars,
2258 ;; which occupy 2 columns instead of one. If we use
2259 ;; column-shift here, we may delete two chars instead of
2260 ;; one when the user types one Chinese character.
2261 ;; Deleting two would be OK, if they were European chars,
2262 ;; but it is not OK if they are Chinese chars.
2263 ;; Since it is hard to
2264 ;; figure out which characters are being deleted in any
2265 ;; given region, we decided to treat Eastern and European
2266 ;; characters equally, even though Eastern chars may
2267 ;; occupy more columns.
2268 (if (memq this-command '(self-insert-command
2269 quoted-insert viper-insert-tab))
2272 ;; the number of deleted chars
2275 (viper-move-marker-locally
2276 'viper-last-posn-in-replace-region
2277 (max (if (> end (viper-replace-end)) (viper-replace-end) end)
2278 (or (marker-position viper-last-posn-in-replace-region)
2279 (viper-replace-start))
2285 ;; Delete stuff between viper-last-posn-in-replace-region and the end of
2286 ;; viper-replace-overlay-marker, if viper-last-posn-in-replace-region is within
2287 ;; the overlay and current point is before the end of the overlay.
2288 ;; Don't delete anything if current point is past the end of the overlay.
2289 (defun viper-finish-change ()
2291 'viper-after-change-functions 'viper-replace-mode-spy-after 'local)
2293 'viper-before-change-functions 'viper-replace-mode-spy-before 'local)
2295 'viper-post-command-hooks 'viper-replace-state-post-command-sentinel 'local)
2297 'viper-pre-command-hooks 'viper-replace-state-pre-command-sentinel 'local)
2298 (viper-restore-cursor-color 'after-replace-mode)
2299 (setq viper-sitting-in-replace nil) ; just in case we'll need to know it
2301 (if (and viper-replace-overlay
2302 (viper-pos-within-region viper-last-posn-in-replace-region
2303 (viper-replace-start)
2304 (viper-replace-end))
2305 (< (point) (viper-replace-end)))
2307 viper-last-posn-in-replace-region (viper-replace-end))))
2309 (if (eq viper-current-state 'replace-state)
2310 (viper-downgrade-to-insert))
2311 ;; replace mode ended => nullify viper-last-posn-in-replace-region
2312 (viper-move-marker-locally 'viper-last-posn-in-replace-region nil)
2313 (viper-hide-replace-overlay)
2314 (viper-refresh-mode-line)
2315 (viper-put-string-on-kill-ring viper-last-replace-region)
2318 ;; Make STRING be the first element of the kill ring.
2319 (defun viper-put-string-on-kill-ring (string)
2320 (setq kill-ring (cons string kill-ring))
2321 (if (> (length kill-ring) kill-ring-max)
2322 (setcdr (nthcdr (1- kill-ring-max) kill-ring) nil))
2323 (setq kill-ring-yank-pointer kill-ring))
2325 (defun viper-finish-R-mode ()
2327 'viper-post-command-hooks 'viper-R-state-post-command-sentinel 'local)
2329 'viper-pre-command-hooks 'viper-replace-state-pre-command-sentinel 'local)
2330 (viper-downgrade-to-insert))
2332 (defun viper-start-R-mode ()
2333 ;; Leave arg as 1, not t: XEmacs insists that it must be a pos number
2336 'viper-post-command-hooks 'viper-R-state-post-command-sentinel t 'local)
2338 'viper-pre-command-hooks 'viper-replace-state-pre-command-sentinel t 'local)
2339 ;; guard against a smartie who switched from R-replace to normal replace
2341 'viper-post-command-hooks 'viper-replace-state-post-command-sentinel 'local)
2346 (defun viper-replace-state-exit-cmd ()
2347 "Binding for keys that cause Replace state to switch to Vi or to Insert.
2348 These keys are ESC, RET, and LineFeed"
2350 (if overwrite-mode ; if in replace mode invoked via 'R'
2351 (viper-finish-R-mode)
2352 (viper-finish-change))
2354 (if (eq this-command 'viper-intercept-ESC-key)
2355 (setq com 'viper-exit-insert-state)
2356 (viper-set-unread-command-events last-input-char)
2357 (setq com (key-binding (read-key-sequence nil))))
2359 (condition-case conds
2360 (command-execute com)
2362 (viper-message-conditions conds)))
2364 (viper-hide-replace-overlay))
2367 (defun viper-replace-state-carriage-return ()
2368 "Carriage return in Viper replace state."
2370 ;; If Emacs start supporting overlay maps, as it currently supports
2371 ;; text-property maps, we could do away with viper-replace-minor-mode and
2372 ;; just have keymap attached to replace overlay. Then the "if part" of this
2373 ;; statement can be deleted.
2374 (if (or (< (point) (viper-replace-start))
2375 (> (point) (viper-replace-end)))
2376 (let (viper-replace-minor-mode com)
2377 (viper-set-unread-command-events last-input-char)
2378 (setq com (key-binding (read-key-sequence nil)))
2379 (condition-case conds
2380 (command-execute com)
2382 (viper-message-conditions conds))))
2383 (if (not viper-allow-multiline-replace-regions)
2384 (viper-replace-state-exit-cmd)
2385 (if (viper-same-line (point) (viper-replace-end))
2386 (viper-replace-state-exit-cmd)
2387 ;; delete the rest of line
2388 (delete-region (point) (viper-line-pos 'end))
2391 (if (eobp) (error "Last line in buffer")))
2392 ;; skip to the next line
2394 (back-to-indentation)
2398 ;; This is the function bound to 'R'---unlimited replace.
2399 ;; Similar to Emacs's own overwrite-mode.
2400 (defun viper-overwrite (arg)
2401 "Begin overwrite mode."
2403 (let ((val (viper-p-val arg))
2404 (com (viper-getcom arg)) (len))
2405 (viper-set-destructive-command (list 'viper-overwrite val ?r nil nil nil))
2408 ;; Viper saves inserted text in viper-last-insertion
2409 (setq len (length viper-last-insertion))
2411 (viper-loop val (viper-yank-last-insertion)))
2412 (setq last-command 'viper-overwrite)
2413 (viper-set-complex-command-for-undo)
2414 (viper-set-replace-overlay (point) (viper-line-pos 'end))
2415 (viper-change-state-to-replace)
2421 (defun viper-line (arg)
2422 (let ((val (car arg))
2424 (viper-move-marker-locally 'viper-com-point (point))
2426 (viper-next-line-carefully (1- val)))
2427 ;; the following ensures that dd, cc, D, yy will do the right thing on the
2428 ;; last line of buffer when this line has no \n.
2429 (viper-add-newline-at-eob-if-necessary)
2430 (viper-execute-com 'viper-line val com))
2431 (if (and (eobp) (not (bobp))) (forward-line -1))
2434 (defun viper-yank-line (arg)
2435 "Yank ARG lines (in Vi's sense)."
2437 (let ((val (viper-p-val arg)))
2438 (viper-line (cons val ?Y))))
2443 (defun viper-region (arg)
2444 "Execute command on a region."
2446 (let ((val (viper-P-val arg))
2447 (com (viper-getcom arg)))
2448 (viper-move-marker-locally 'viper-com-point (point))
2449 (exchange-point-and-mark)
2450 (viper-execute-com 'viper-region val com)))
2452 (defun viper-Region (arg)
2453 "Execute command on a Region."
2455 (let ((val (viper-P-val arg))
2456 (com (viper-getCom arg)))
2457 (viper-move-marker-locally 'viper-com-point (point))
2458 (exchange-point-and-mark)
2459 (viper-execute-com 'viper-Region val com)))
2461 (defun viper-replace-char (arg)
2462 "Replace the following ARG chars by the character read."
2464 (if (and (eolp) (bolp)) (error "No character to replace here"))
2465 (let ((val (viper-p-val arg))
2466 (com (viper-getcom arg)))
2467 (viper-replace-char-subr com val)
2468 (if (and (eolp) (not (bolp))) (forward-char 1))
2469 (setq viper-this-command-keys
2470 (format "%sr" (if (integerp arg) arg "")))
2471 (viper-set-destructive-command
2472 (list 'viper-replace-char val ?r nil viper-d-char nil))
2475 (defun viper-replace-char-subr (com arg)
2477 (setq char (if (viper= com ?r)
2480 (let (inhibit-quit) ; preserve consistency of undo-list and iso-accents
2481 (if (and viper-automatic-iso-accents
2482 (viper-memq-char char '(?' ?\" ?^ ?~)))
2483 ;; get European characters
2485 (viper-set-iso-accents-mode t)
2486 (viper-set-unread-command-events char)
2487 (setq char (aref (read-key-sequence nil) 0))
2488 (viper-set-iso-accents-mode nil)))
2489 (viper-set-complex-command-for-undo)
2490 (if (eq char ?\C-m) (setq char ?\n))
2491 (if (and viper-special-input-method (fboundp 'quail-start-translation))
2492 ;; get Intl. characters
2494 (viper-set-input-method t)
2495 (setq last-command-event
2497 (if viper-xemacs-p (character-to-event char) char)))
2503 (quail-start-translation 1)
2504 (quail-start-translation)))
2506 ;; quail translation failed
2507 (if (and (not (stringp quail-current-str))
2508 (not (viper-characterp quail-current-str)))
2513 (viper-set-input-method nil)
2514 (error "Composing character failed, changes undone")))
2515 ;; quail translation seems ok
2517 ;;(setq char quail-current-str))
2518 (setq char (viper-char-at-pos 'backward)))
2519 (setq viper-d-char char)
2520 (viper-loop (1- (if (> arg 0) arg (- arg)))
2523 (viper-set-input-method nil))
2525 (setq viper-d-char char)
2526 (viper-loop (if (> arg 0) arg (- arg))
2529 (backward-char arg))))
2532 ;; basic cursor movement. j, k, l, h commands.
2534 (defun viper-forward-char (arg)
2535 "Move point right ARG characters (left if ARG negative).
2536 On reaching end of line, stop and signal error."
2538 (viper-leave-region-active)
2539 (let ((val (viper-p-val arg))
2540 (com (viper-getcom arg)))
2541 (if com (viper-move-marker-locally 'viper-com-point (point)))
2542 (if viper-ex-style-motion
2544 ;; the boundary condition check gets weird here because
2545 ;; forward-char may be the parameter of a delete, and 'dl' works
2546 ;; just like 'x' for the last char on a line, so we have to allow
2547 ;; the forward motion before the 'viper-execute-com', but, of
2548 ;; course, 'dl' doesn't work on an empty line, so we have to
2549 ;; catch that condition before 'viper-execute-com'
2550 (if (and (eolp) (bolp)) (error "") (forward-char val))
2551 (if com (viper-execute-com 'viper-forward-char val com))
2552 (if (eolp) (progn (backward-char 1) (error ""))))
2554 (if com (viper-execute-com 'viper-forward-char val com)))))
2557 (defun viper-backward-char (arg)
2558 "Move point left ARG characters (right if ARG negative).
2559 On reaching beginning of line, stop and signal error."
2561 (viper-leave-region-active)
2562 (let ((val (viper-p-val arg))
2563 (com (viper-getcom arg)))
2564 (if com (viper-move-marker-locally 'viper-com-point (point)))
2565 (if viper-ex-style-motion
2567 (if (bolp) (error "") (backward-char val))
2568 (if com (viper-execute-com 'viper-backward-char val com)))
2570 (if com (viper-execute-com 'viper-backward-char val com)))))
2573 ;; Like forward-char, but doesn't move at end of buffer.
2574 ;; Returns distance traveled
2575 ;; (positive or 0, if arg positive; negative if arg negative).
2576 (defun viper-forward-char-carefully (&optional arg)
2577 (setq arg (or arg 1))
2582 (if (< (point) pt) ; arg was negative
2583 (- (viper-chars-in-region pt (point)))
2584 (viper-chars-in-region pt (point)))))
2587 ;; Like backward-char, but doesn't move at beg of buffer.
2588 ;; Returns distance traveled
2589 ;; (negative or 0, if arg positive; positive if arg negative).
2590 (defun viper-backward-char-carefully (&optional arg)
2591 (setq arg (or arg 1))
2596 (if (> (point) pt) ; arg was negative
2597 (viper-chars-in-region pt (point))
2598 (- (viper-chars-in-region pt (point))))))
2600 (defun viper-next-line-carefully (arg)
2609 ;; Words are formed from alpha's and nonalphas - <sp>,\t\n are separators for
2610 ;; word movement. When executed with a destructive command, \n is usually left
2611 ;; untouched for the last word. Viper uses syntax table to determine what is a
2612 ;; word and what is a separator. However, \n is always a separator. Also, if
2613 ;; viper-syntax-preference is 'vi, then `_' is part of the word.
2616 (defun viper-skip-separators (forward)
2619 (viper-skip-all-separators-forward 'within-line)
2620 (if (looking-at "\n")
2623 (viper-skip-all-separators-forward 'within-line))))
2624 ;; check for eob and white space before it. move off of eob
2625 (if (and (eobp) (save-excursion
2626 (viper-backward-char-carefully)
2627 (viper-looking-at-separator)))
2628 (viper-backward-char-carefully))
2629 (viper-skip-all-separators-backward 'within-line)
2630 (viper-backward-char-carefully)
2631 (if (looking-at "\n")
2632 (viper-skip-all-separators-backward 'within-line)
2633 (or (bobp) (forward-char)))))
2636 (defun viper-forward-word-kernel (val)
2638 (cond ((viper-looking-at-alpha)
2639 (viper-skip-alpha-forward "_")
2640 (viper-skip-separators t))
2641 ((viper-looking-at-separator)
2642 (viper-skip-separators t))
2643 ((not (viper-looking-at-alphasep))
2644 (viper-skip-nonalphasep-forward)
2645 (viper-skip-separators t)))
2646 (setq val (1- val))))
2648 ;; first skip non-newline separators backward, then skip \n. Then, if TWICE is
2649 ;; non-nil, skip non-\n back again, but don't overshoot the limit LIM.
2650 (defun viper-separator-skipback-special (twice lim)
2651 (let ((prev-char (viper-char-at-pos 'backward))
2652 (saved-point (point)))
2653 ;; skip non-newline separators backward
2654 (while (and (not (viper-memq-char prev-char '(nil \n)))
2656 ;; must be non-newline separator
2657 (if (eq viper-syntax-preference 'strict-vi)
2658 (viper-memq-char prev-char '(?\ ?\t))
2659 (viper-memq-char (char-syntax prev-char) '(?\ ?-))))
2660 (viper-backward-char-carefully)
2661 (setq prev-char (viper-char-at-pos 'backward)))
2663 (if (and (< lim (point)) (eq prev-char ?\n))
2665 ;; If we skipped to the next word and the prefix of this line doesn't
2666 ;; consist of separators preceded by a newline, then don't skip backwards
2668 (goto-char saved-point))
2669 (setq prev-char (viper-char-at-pos 'backward))
2671 ;; skip again, but make sure we don't overshoot the limit
2673 (while (and (not (viper-memq-char prev-char '(nil \n)))
2675 ;; must be non-newline separator
2676 (if (eq viper-syntax-preference 'strict-vi)
2677 (viper-memq-char prev-char '(?\ ?\t))
2678 (viper-memq-char (char-syntax prev-char) '(?\ ?-))))
2679 (viper-backward-char-carefully)
2680 (setq prev-char (viper-char-at-pos 'backward))))
2683 (viper-forward-char-carefully))
2687 (defun viper-forward-word (arg)
2690 (viper-leave-region-active)
2691 (let ((val (viper-p-val arg))
2692 (com (viper-getcom arg)))
2693 (if com (viper-move-marker-locally 'viper-com-point (point)))
2694 (viper-forward-word-kernel val)
2696 (cond ((viper-memq-char com (list ?c (- ?c)))
2697 (viper-separator-skipback-special 'twice viper-com-point))
2698 ;; Yank words including the whitespace, but not newline
2699 ((viper-memq-char com (list ?y (- ?y)))
2700 (viper-separator-skipback-special nil viper-com-point))
2701 ((viper-dotable-command-p com)
2702 (viper-separator-skipback-special nil viper-com-point)))
2703 (viper-execute-com 'viper-forward-word val com)))))
2706 (defun viper-forward-Word (arg)
2707 "Forward word delimited by white characters."
2709 (viper-leave-region-active)
2710 (let ((val (viper-p-val arg))
2711 (com (viper-getcom arg)))
2712 (if com (viper-move-marker-locally 'viper-com-point (point)))
2714 (viper-skip-nonseparators 'forward)
2715 (viper-skip-separators t))
2717 (cond ((viper-memq-char com (list ?c (- ?c)))
2718 (viper-separator-skipback-special 'twice viper-com-point))
2719 ;; Yank words including the whitespace, but not newline
2720 ((viper-memq-char com (list ?y (- ?y)))
2721 (viper-separator-skipback-special nil viper-com-point))
2722 ((viper-dotable-command-p com)
2723 (viper-separator-skipback-special nil viper-com-point)))
2724 (viper-execute-com 'viper-forward-Word val com)))))
2727 ;; this is a bit different from Vi, but Vi's end of word
2728 ;; makes no sense whatsoever
2729 (defun viper-end-of-word-kernel ()
2730 (if (viper-end-of-word-p) (forward-char))
2731 (if (viper-looking-at-separator)
2732 (viper-skip-all-separators-forward))
2734 (cond ((viper-looking-at-alpha) (viper-skip-alpha-forward "_"))
2735 ((not (viper-looking-at-alphasep)) (viper-skip-nonalphasep-forward)))
2736 (viper-backward-char-carefully))
2738 (defun viper-end-of-word-p ()
2741 (cond ((viper-looking-at-alpha)
2743 (not (viper-looking-at-alpha)))
2744 ((not (viper-looking-at-alphasep))
2746 (viper-looking-at-alphasep))))))
2749 (defun viper-end-of-word (arg &optional careful)
2750 "Move point to end of current word."
2752 (viper-leave-region-active)
2753 (let ((val (viper-p-val arg))
2754 (com (viper-getcom arg)))
2755 (if com (viper-move-marker-locally 'viper-com-point (point)))
2756 (viper-loop val (viper-end-of-word-kernel))
2760 (viper-execute-com 'viper-end-of-word val com)))))
2762 (defun viper-end-of-Word (arg)
2763 "Forward to end of word delimited by white character."
2765 (viper-leave-region-active)
2766 (let ((val (viper-p-val arg))
2767 (com (viper-getcom arg)))
2768 (if com (viper-move-marker-locally 'viper-com-point (point)))
2770 (viper-end-of-word-kernel)
2771 (viper-skip-nonseparators 'forward)
2776 (viper-execute-com 'viper-end-of-Word val com)))))
2778 (defun viper-backward-word-kernel (val)
2780 (viper-backward-char-carefully)
2781 (cond ((viper-looking-at-alpha)
2782 (viper-skip-alpha-backward "_"))
2783 ((viper-looking-at-separator)
2785 (viper-skip-separators nil)
2786 (viper-backward-char-carefully)
2787 (cond ((viper-looking-at-alpha)
2788 (viper-skip-alpha-backward "_"))
2789 ((not (viper-looking-at-alphasep))
2790 (viper-skip-nonalphasep-backward))
2791 ((bobp)) ; could still be at separator, but at beg of buffer
2792 (t (forward-char))))
2793 ((not (viper-looking-at-alphasep))
2794 (viper-skip-nonalphasep-backward)))
2795 (setq val (1- val))))
2797 (defun viper-backward-word (arg)
2800 (viper-leave-region-active)
2801 (let ((val (viper-p-val arg))
2802 (com (viper-getcom arg)))
2805 (if (setq i (save-excursion (backward-char) (looking-at "\n")))
2807 (viper-move-marker-locally 'viper-com-point (point))
2808 (if i (forward-char))))
2809 (viper-backward-word-kernel val)
2810 (if com (viper-execute-com 'viper-backward-word val com))))
2812 (defun viper-backward-Word (arg)
2813 "Backward word delimited by white character."
2815 (viper-leave-region-active)
2816 (let ((val (viper-p-val arg))
2817 (com (viper-getcom arg)))
2820 (if (setq i (save-excursion (backward-char) (looking-at "\n")))
2822 (viper-move-marker-locally 'viper-com-point (point))
2823 (if i (forward-char))))
2825 (viper-skip-separators nil) ; nil means backward here
2826 (viper-skip-nonseparators 'backward))
2827 (if com (viper-execute-com 'viper-backward-Word val com))))
2833 (defun viper-beginning-of-line (arg)
2834 "Go to beginning of line."
2836 (viper-leave-region-active)
2837 (let ((val (viper-p-val arg))
2838 (com (viper-getcom arg)))
2839 (if com (viper-move-marker-locally 'viper-com-point (point)))
2840 (beginning-of-line val)
2841 (if com (viper-execute-com 'viper-beginning-of-line val com))))
2843 (defun viper-bol-and-skip-white (arg)
2844 "Beginning of line at first non-white character."
2846 (viper-leave-region-active)
2847 (let ((val (viper-p-val arg))
2848 (com (viper-getcom arg)))
2849 (if com (viper-move-marker-locally 'viper-com-point (point)))
2850 (forward-to-indentation (1- val))
2851 (if com (viper-execute-com 'viper-bol-and-skip-white val com))))
2853 (defun viper-goto-eol (arg)
2854 "Go to end of line."
2856 (viper-leave-region-active)
2857 (let ((val (viper-p-val arg))
2858 (com (viper-getcom arg)))
2859 (if com (viper-move-marker-locally 'viper-com-point (point)))
2861 (if com (viper-execute-com 'viper-goto-eol val com))
2862 (if viper-ex-style-motion
2863 (if (and (eolp) (not (bolp))
2864 ;; a fix for viper-change-to-eol
2865 (not (equal viper-current-state 'insert-state)))
2870 (defun viper-goto-col (arg)
2871 "Go to ARG's column."
2873 (viper-leave-region-active)
2874 (let ((val (viper-p-val arg))
2875 (com (viper-getcom arg))
2878 (viper-chars-in-region
2879 (viper-line-pos 'start) (viper-line-pos 'end)))
2880 (if com (viper-move-marker-locally 'viper-com-point (point)))
2882 (forward-char (1- (min line-len val)))
2883 (while (> (current-column) (1- val))
2885 (if com (viper-execute-com 'viper-goto-col val com))
2888 (if (> val (current-column)) (error "")))
2892 (defun viper-next-line (arg)
2895 (viper-leave-region-active)
2896 (let ((val (viper-p-val arg))
2897 (com (viper-getCom arg)))
2898 (if com (viper-move-marker-locally 'viper-com-point (point)))
2900 (if viper-ex-style-motion
2901 (if (and (eolp) (not (bolp))) (backward-char 1)))
2902 (setq this-command 'next-line)
2903 (if com (viper-execute-com 'viper-next-line val com))))
2905 (defun viper-next-line-at-bol (arg)
2906 "Next line at beginning of line."
2908 (viper-leave-region-active)
2911 (if (eobp) (error "Last line in buffer")))
2912 (let ((val (viper-p-val arg))
2913 (com (viper-getCom arg)))
2914 (if com (viper-move-marker-locally 'viper-com-point (point)))
2916 (back-to-indentation)
2917 (if com (viper-execute-com 'viper-next-line-at-bol val com))))
2920 (defun viper-previous-line (arg)
2921 "Go to previous line."
2923 (viper-leave-region-active)
2924 (let ((val (viper-p-val arg))
2925 (com (viper-getCom arg)))
2926 (if com (viper-move-marker-locally 'viper-com-point (point)))
2928 (if viper-ex-style-motion
2929 (if (and (eolp) (not (bolp))) (backward-char 1)))
2930 (setq this-command 'previous-line)
2931 (if com (viper-execute-com 'viper-previous-line val com))))
2934 (defun viper-previous-line-at-bol (arg)
2935 "Previous line at beginning of line."
2937 (viper-leave-region-active)
2940 (if (bobp) (error "First line in buffer")))
2941 (let ((val (viper-p-val arg))
2942 (com (viper-getCom arg)))
2943 (if com (viper-move-marker-locally 'viper-com-point (point)))
2944 (forward-line (- val))
2945 (back-to-indentation)
2946 (if com (viper-execute-com 'viper-previous-line val com))))
2948 (defun viper-change-to-eol (arg)
2949 "Change to end of line."
2951 (viper-goto-eol (cons arg ?c)))
2953 (defun viper-kill-line (arg)
2956 (viper-goto-eol (cons arg ?d)))
2958 (defun viper-erase-line (arg)
2961 (viper-beginning-of-line (cons arg ?d)))
2966 (defun viper-goto-line (arg)
2967 "Go to ARG's line. Without ARG go to end of buffer."
2969 (let ((val (viper-P-val arg))
2970 (com (viper-getCom arg)))
2971 (viper-move-marker-locally 'viper-com-point (point))
2972 (viper-deactivate-mark)
2975 (goto-char (point-max))
2976 (goto-char (point-min))
2977 (forward-line (1- val)))
2979 ;; positioning is done twice: before and after command execution
2980 (if (and (eobp) (bolp) (not (bobp))) (forward-line -1))
2981 (back-to-indentation)
2983 (if com (viper-execute-com 'viper-goto-line val com))
2985 (if (and (eobp) (bolp) (not (bobp))) (forward-line -1))
2986 (back-to-indentation)
2989 ;; Find ARG's occurrence of CHAR on the current line.
2990 ;; If FORWARD then search is forward, otherwise backward. OFFSET is used to
2991 ;; adjust point after search.
2992 (defun viper-find-char (arg char forward offset)
2993 (or (char-or-string-p char) (error ""))
2994 (let ((arg (if forward arg (- arg)))
2995 (cmd (if (eq viper-intermediate-command 'viper-repeat)
2997 (viper-array-to-string (this-command-keys))))
2998 point region-beg region-end)
3001 (if (> arg 0) ; forward
3003 (setq region-beg (point))
3004 (if viper-allow-multiline-replace-regions
3005 (viper-forward-paragraph 1)
3007 (setq region-end (point)))
3008 (setq region-end (point))
3009 (if viper-allow-multiline-replace-regions
3010 (viper-backward-paragraph 1)
3011 (beginning-of-line))
3012 (setq region-beg (point)))
3013 (if (or (and (< arg 0)
3014 (< (- region-end region-beg)
3015 (if viper-allow-multiline-replace-regions
3019 (< (- region-end region-beg)
3020 (if viper-allow-multiline-replace-regions
3023 (error "Command `%s': At %s of %s"
3025 (if (> arg 0) "end" "beginning")
3026 (if viper-allow-multiline-replace-regions
3027 "paragraph" "line")))
3028 (narrow-to-region region-beg region-end)
3029 ;; if arg > 0, point is forwarded before search.
3030 (if (> arg 0) (goto-char (1+ (point-min)))
3031 (goto-char (point-max)))
3032 (if (let ((case-fold-search nil))
3033 (search-forward (char-to-string char) nil 0 arg))
3034 (setq point (point))
3035 (error "Command `%s': `%c' not found" cmd char))))
3038 (backward-char (if offset 2 1))
3039 (forward-char (if offset 1 0)))))
3041 (defun viper-find-char-forward (arg)
3042 "Find char on the line.
3043 If called interactively read the char to find from the terminal, and if
3044 called from viper-repeat, the char last used is used. This behaviour is
3045 controlled by the sign of prefix numeric value."
3047 (let ((val (viper-p-val arg))
3048 (com (viper-getcom arg))
3049 (cmd-representation (nth 5 viper-d-com)))
3051 ;; this means that the function was called interactively
3052 (setq viper-f-char (read-char)
3055 ;; viper-repeat --- set viper-F-char from command-keys
3056 (setq viper-F-char (if (stringp cmd-representation)
3057 (viper-seq-last-elt cmd-representation)
3059 viper-f-char viper-F-char)
3061 (if com (viper-move-marker-locally 'viper-com-point (point)))
3063 val (if (> (viper-p-val arg) 0) viper-f-char viper-F-char) t nil)
3067 (setq viper-F-char viper-f-char) ; set new viper-F-char
3069 (viper-execute-com 'viper-find-char-forward val com)))))
3071 (defun viper-goto-char-forward (arg)
3072 "Go up to char ARG forward on line."
3074 (let ((val (viper-p-val arg))
3075 (com (viper-getcom arg))
3076 (cmd-representation (nth 5 viper-d-com)))
3078 ;; this means that the function was called interactively
3079 (setq viper-f-char (read-char)
3082 ;; viper-repeat --- set viper-F-char from command-keys
3083 (setq viper-F-char (if (stringp cmd-representation)
3084 (viper-seq-last-elt cmd-representation)
3086 viper-f-char viper-F-char)
3088 (if com (viper-move-marker-locally 'viper-com-point (point)))
3090 val (if (> (viper-p-val arg) 0) viper-f-char viper-F-char) t t)
3094 (setq viper-F-char viper-f-char) ; set new viper-F-char
3096 (viper-execute-com 'viper-goto-char-forward val com)))))
3098 (defun viper-find-char-backward (arg)
3099 "Find char ARG on line backward."
3101 (let ((val (viper-p-val arg))
3102 (com (viper-getcom arg))
3103 (cmd-representation (nth 5 viper-d-com)))
3105 ;; this means that the function was called interactively
3106 (setq viper-f-char (read-char)
3109 ;; viper-repeat --- set viper-F-char from command-keys
3110 (setq viper-F-char (if (stringp cmd-representation)
3111 (viper-seq-last-elt cmd-representation)
3113 viper-f-char viper-F-char)
3115 (if com (viper-move-marker-locally 'viper-com-point (point)))
3117 val (if (> (viper-p-val arg) 0) viper-f-char viper-F-char) nil nil)
3121 (setq viper-F-char viper-f-char) ; set new viper-F-char
3122 (viper-execute-com 'viper-find-char-backward val com)))))
3124 (defun viper-goto-char-backward (arg)
3125 "Go up to char ARG backward on line."
3127 (let ((val (viper-p-val arg))
3128 (com (viper-getcom arg))
3129 (cmd-representation (nth 5 viper-d-com)))
3131 ;; this means that the function was called interactively
3132 (setq viper-f-char (read-char)
3135 ;; viper-repeat --- set viper-F-char from command-keys
3136 (setq viper-F-char (if (stringp cmd-representation)
3137 (viper-seq-last-elt cmd-representation)
3139 viper-f-char viper-F-char)
3141 (if com (viper-move-marker-locally 'viper-com-point (point)))
3143 val (if (> (viper-p-val arg) 0) viper-f-char viper-F-char) nil t)
3147 (setq viper-F-char viper-f-char) ; set new viper-F-char
3148 (viper-execute-com 'viper-goto-char-backward val com)))))
3150 (defun viper-repeat-find (arg)
3151 "Repeat previous find command."
3153 (let ((val (viper-p-val arg))
3154 (com (viper-getcom arg)))
3155 (viper-deactivate-mark)
3156 (if com (viper-move-marker-locally 'viper-com-point (point)))
3157 (viper-find-char val viper-f-char viper-f-forward viper-f-offset)
3160 (if viper-f-forward (forward-char))
3161 (viper-execute-com 'viper-repeat-find val com)))))
3163 (defun viper-repeat-find-opposite (arg)
3164 "Repeat previous find command in the opposite direction."
3166 (let ((val (viper-p-val arg))
3167 (com (viper-getcom arg)))
3168 (viper-deactivate-mark)
3169 (if com (viper-move-marker-locally 'viper-com-point (point)))
3170 (viper-find-char val viper-f-char (not viper-f-forward) viper-f-offset)
3173 (if viper-f-forward (forward-char))
3174 (viper-execute-com 'viper-repeat-find-opposite val com)))))
3177 ;; window scrolling etc.
3179 (defun viper-window-top (arg)
3180 "Go to home window line."
3182 (let ((val (viper-p-val arg))
3183 (com (viper-getCom arg)))
3184 (viper-leave-region-active)
3185 (if com (viper-move-marker-locally 'viper-com-point (point)))
3187 (move-to-window-line (1- val))
3189 ;; positioning is done twice: before and after command execution
3190 (if (and (eobp) (bolp) (not (bobp))) (forward-line -1))
3191 (back-to-indentation)
3193 (if com (viper-execute-com 'viper-window-top val com))
3195 (if (and (eobp) (bolp) (not (bobp))) (forward-line -1))
3196 (back-to-indentation)
3199 (defun viper-window-middle (arg)
3200 "Go to middle window line."
3202 (let ((val (viper-p-val arg))
3203 (com (viper-getCom arg)))
3204 (viper-leave-region-active)
3205 (if com (viper-move-marker-locally 'viper-com-point (point)))
3207 (move-to-window-line (+ (/ (1- (window-height)) 2) (1- val)))
3209 ;; positioning is done twice: before and after command execution
3210 (if (and (eobp) (bolp) (not (bobp))) (forward-line -1))
3211 (back-to-indentation)
3213 (if com (viper-execute-com 'viper-window-middle val com))
3215 (if (and (eobp) (bolp) (not (bobp))) (forward-line -1))
3216 (back-to-indentation)
3219 (defun viper-window-bottom (arg)
3220 "Go to last window line."
3222 (let ((val (viper-p-val arg))
3223 (com (viper-getCom arg)))
3224 (viper-leave-region-active)
3225 (if com (viper-move-marker-locally 'viper-com-point (point)))
3227 (move-to-window-line (- val))
3229 ;; positioning is done twice: before and after command execution
3230 (if (and (eobp) (bolp) (not (bobp))) (forward-line -1))
3231 (back-to-indentation)
3233 (if com (viper-execute-com 'viper-window-bottom val com))
3235 (if (and (eobp) (bolp) (not (bobp))) (forward-line -1))
3236 (back-to-indentation)
3239 (defun viper-line-to-top (arg)
3240 "Put current line on the home line."
3242 (recenter (1- arg)))
3244 (defun viper-line-to-middle (arg)
3245 "Put current line on the middle line."
3247 (recenter (+ (1- arg) (/ (1- (window-height)) 2))))
3249 (defun viper-line-to-bottom (arg)
3250 "Put current line on the last line."
3252 (recenter (- (window-height) (1+ arg))))
3254 ;; If point is within viper-search-scroll-threshold of window top or bottom,
3255 ;; scroll up or down 1/7 of window height, depending on whether we are at the
3256 ;; bottom or at the top of the window. This function is called by viper-search
3257 ;; (which is called from viper-search-forward/backward/next). If the value of
3258 ;; viper-search-scroll-threshold is negative - don't scroll.
3259 (defun viper-adjust-window ()
3260 (let ((win-height (if viper-emacs-p
3261 (1- (window-height)) ; adjust for modeline
3262 (window-displayed-height)))
3264 at-top-p at-bottom-p
3265 min-scroll direction)
3267 (move-to-window-line 0) ; top
3269 (<= (count-lines pt (point))
3270 viper-search-scroll-threshold))
3271 (move-to-window-line -1) ; bottom
3273 (<= (count-lines pt (point)) viper-search-scroll-threshold))
3275 (cond (at-top-p (setq min-scroll (1- viper-search-scroll-threshold)
3277 (at-bottom-p (setq min-scroll (1+ viper-search-scroll-threshold)
3281 (* (max min-scroll (/ win-height 7)) direction)))
3286 ;; must correct this to only match ( to ) etc. On the other hand
3287 ;; it is good that paren match gets confused, because that way you
3288 ;; catch _all_ imbalances.
3290 (defun viper-paren-match (arg)
3291 "Go to the matching parenthesis."
3293 (viper-leave-region-active)
3294 (let ((com (viper-getcom arg))
3295 (parse-sexp-ignore-comments viper-parse-sexp-ignore-comments)
3298 (if (or (> arg 99) (< arg 1))
3299 (error "Prefix must be between 1 and 99")
3301 (if (> (point-max) 80000)
3302 (* (/ (point-max) 100) arg)
3303 (/ (* (point-max) arg) 100)))
3304 (back-to-indentation))
3305 (let (beg-lim end-lim)
3306 (if (and (eolp) (not (bolp))) (forward-char -1))
3307 (if (not (looking-at "[][(){}]"))
3308 (setq anchor-point (point)))
3311 (setq beg-lim (point))
3313 (setq end-lim (point)))
3314 (cond ((re-search-forward "[][(){}]" end-lim t)
3316 ((re-search-backward "[][(){}]" beg-lim t))
3318 (error "No matching character on line"))))
3319 (cond ((looking-at "[\(\[{]")
3320 (if com (viper-move-marker-locally 'viper-com-point (point)))
3323 (viper-execute-com 'viper-paren-match nil com)
3328 (viper-move-marker-locally 'viper-com-point anchor-point)
3330 (viper-execute-com 'viper-paren-match nil com)
3332 ((looking-at "[])}]")
3334 (if com (viper-move-marker-locally 'viper-com-point (point)))
3336 (if com (viper-execute-com 'viper-paren-match nil com)))
3339 (defun viper-toggle-parse-sexp-ignore-comments ()
3341 (setq viper-parse-sexp-ignore-comments
3342 (not viper-parse-sexp-ignore-comments))
3344 "From now on, `%%' will %signore parentheses inside comment fields"
3345 (if viper-parse-sexp-ignore-comments "" "NOT "))))
3348 ;; sentence, paragraph and heading
3350 (defun viper-forward-sentence (arg)
3353 (or (eq last-command this-command)
3355 (let ((val (viper-p-val arg))
3356 (com (viper-getcom arg)))
3357 (if com (viper-move-marker-locally 'viper-com-point (point)))
3358 (forward-sentence val)
3359 (if com (viper-execute-com 'viper-forward-sentence nil com))))
3361 (defun viper-backward-sentence (arg)
3362 "Backward sentence."
3364 (or (eq last-command this-command)
3366 (let ((val (viper-p-val arg))
3367 (com (viper-getcom arg)))
3368 (if com (viper-move-marker-locally 'viper-com-point (point)))
3369 (backward-sentence val)
3370 (if com (viper-execute-com 'viper-backward-sentence nil com))))
3372 (defun viper-forward-paragraph (arg)
3373 "Forward paragraph."
3375 (or (eq last-command this-command)
3377 (let ((val (viper-p-val arg))
3378 ;; if you want d} operate on whole lines, change viper-getcom to
3379 ;; viper-getCom below
3380 (com (viper-getcom arg)))
3381 (if com (viper-move-marker-locally 'viper-com-point (point)))
3382 (forward-paragraph val)
3386 (viper-execute-com 'viper-forward-paragraph nil com)))))
3388 (defun viper-backward-paragraph (arg)
3389 "Backward paragraph."
3391 (or (eq last-command this-command)
3393 (let ((val (viper-p-val arg))
3394 ;; if you want d{ operate on whole lines, change viper-getcom to
3395 ;; viper-getCom below
3396 (com (viper-getcom arg)))
3397 (if com (viper-move-marker-locally 'viper-com-point (point)))
3398 (backward-paragraph val)
3402 (viper-execute-com 'viper-backward-paragraph nil com)
3403 (backward-char 1)))))
3405 ;; should be mode-specific
3406 (defun viper-prev-heading (arg)
3408 (let ((val (viper-p-val arg))
3409 (com (viper-getCom arg)))
3410 (if com (viper-move-marker-locally 'viper-com-point (point)))
3411 (re-search-backward viper-heading-start nil t val)
3412 (goto-char (match-beginning 0))
3413 (if com (viper-execute-com 'viper-prev-heading nil com))))
3415 (defun viper-heading-end (arg)
3417 (let ((val (viper-p-val arg))
3418 (com (viper-getCom arg)))
3419 (if com (viper-move-marker-locally 'viper-com-point (point)))
3420 (re-search-forward viper-heading-end nil t val)
3421 (goto-char (match-beginning 0))
3422 (if com (viper-execute-com 'viper-heading-end nil com))))
3424 (defun viper-next-heading (arg)
3426 (let ((val (viper-p-val arg))
3427 (com (viper-getCom arg)))
3428 (if com (viper-move-marker-locally 'viper-com-point (point)))
3430 (re-search-forward viper-heading-start nil t val)
3431 (goto-char (match-beginning 0))
3432 (if com (viper-execute-com 'viper-next-heading nil com))))
3437 (defun viper-scroll-screen (arg)
3438 "Scroll to next screen."
3444 (setq arg (1- arg)))
3447 (setq arg (1+ arg))))
3451 (message "End of buffer")
3452 (goto-char (point-max)))
3453 (message "Beginning of buffer")
3454 (goto-char (point-min))))
3457 (defun viper-scroll-screen-back (arg)
3458 "Scroll to previous screen."
3460 (viper-scroll-screen (- arg)))
3462 (defun viper-scroll-down (arg)
3463 "Pull down half screen."
3467 (scroll-down (/ (window-height) 2))
3470 (message "Beginning of buffer")
3471 (goto-char (point-min)))))
3473 (defun viper-scroll-down-one (arg)
3474 "Scroll up one line."
3478 (defun viper-scroll-up (arg)
3479 "Pull up half screen."
3483 (scroll-up (/ (window-height) 2))
3486 (message "End of buffer")
3487 (goto-char (point-max)))))
3489 (defun viper-scroll-up-one (arg)
3490 "Scroll down one line."
3497 (defun viper-if-string (prompt)
3498 (if (memq viper-intermediate-command
3499 '(viper-command-argument viper-digit-argument viper-repeat))
3500 (setq viper-this-command-keys (this-command-keys)))
3501 (let ((s (viper-read-string-with-history
3504 'viper-search-history
3505 (car viper-search-history))))
3506 (if (not (string= s ""))
3507 (setq viper-s-string s))))
3510 (defun viper-toggle-search-style (arg)
3511 "Toggle the value of viper-case-fold-search/viper-re-search.
3512 Without prefix argument, will ask which search style to toggle. With prefix
3513 arg 1,toggles viper-case-fold-search; with arg 2 toggles viper-re-search.
3515 Although this function is bound to \\[viper-toggle-search-style], the most
3516 convenient way to use it is to bind `//' to the macro
3517 `1 M-x viper-toggle-search-style' and `///' to
3518 `2 M-x viper-toggle-search-style'. In this way, hitting `//' quickly will
3519 toggle case-fold-search and hitting `/' three times witth toggle regexp
3520 search. Macros are more convenient in this case because they don't affect
3521 the Emacs binding of `/'."
3524 (cond ((or (eq arg 1)
3526 (y-or-n-p (format "Search style: '%s'. Want '%s'? "
3527 (if viper-case-fold-search
3528 "case-insensitive" "case-sensitive")
3529 (if viper-case-fold-search
3531 "case-insensitive")))))
3532 (setq viper-case-fold-search (null viper-case-fold-search))
3533 (if viper-case-fold-search
3534 (setq msg "Search becomes case-insensitive")
3535 (setq msg "Search becomes case-sensitive")))
3538 (y-or-n-p (format "Search style: '%s'. Want '%s'? "
3540 "regexp-search" "vanilla-search")
3543 "regexp-search")))))
3544 (setq viper-re-search (null viper-re-search))
3546 (setq msg "Search becomes regexp-style")
3547 (setq msg "Search becomes vanilla-style")))
3549 (setq msg "Search style remains unchanged")))
3552 (defun viper-set-searchstyle-toggling-macros (unset)
3553 "Set the macros for toggling the search style in Viper's vi-state.
3554 The macro that toggles case sensitivity is bound to `//', and the one that
3555 toggles regexp search is bound to `///'.
3556 With a prefix argument, this function unsets the macros. "
3561 ;; toggle case sensitivity in search
3562 (viper-record-kbd-macro
3564 [1 (meta x) v i p e r - t o g g l e - s e a r c h - s t y l e return]
3566 ;; toggle regexp/vanila search
3567 (viper-record-kbd-macro
3569 [2 (meta x) v i p e r - t o g g l e - s e a r c h - s t y l e return]
3573 "// and /// now toggle case-sensitivity and regexp search")))
3574 (viper-unrecord-kbd-macro "//" 'vi-state)
3576 (viper-unrecord-kbd-macro "///" 'vi-state))))
3579 (defun viper-set-parsing-style-toggling-macro (unset)
3580 "Set `%%%' to be a macro that toggles whether comment fields should be parsed for matching parentheses.
3581 This is used in conjunction with the `%' command.
3583 With a prefix argument, unsets the macro."
3588 ;; Make %%% toggle parsing comments for matching parentheses
3589 (viper-record-kbd-macro
3591 [(meta x) v i p e r - t o g g l e - p a r s e - s e x p - i g n o r e - c o m m e n t s return]
3595 "%%%%%% now toggles whether comments should be parsed for matching parentheses")))
3596 (viper-unrecord-kbd-macro "%%%" 'vi-state))))
3599 (defun viper-set-emacs-state-searchstyle-macros (unset &optional arg-majormode)
3600 "Set the macros for toggling the search style in Viper's emacs-state.
3601 The macro that toggles case sensitivity is bound to `//', and the one that
3602 toggles regexp search is bound to `///'.
3603 With a prefix argument, this function unsets the macros.
3604 If the optional prefix argument is non-nil and specifies a valid major mode,
3605 this sets the macros only in the macros in that major mode. Otherwise,
3606 the macros are set in the current major mode.
3607 \(When unsetting the macros, the second argument has no effect.\)"
3612 ;; toggle case sensitivity in search
3613 (viper-record-kbd-macro
3615 [1 (meta x) v i p e r - t o g g l e - s e a r c h - s t y l e return]
3616 (or arg-majormode major-mode))
3617 ;; toggle regexp/vanila search
3618 (viper-record-kbd-macro
3620 [2 (meta x) v i p e r - t o g g l e - s e a r c h - s t y l e return]
3621 (or arg-majormode major-mode))
3624 "// and /// now toggle case-sensitivity and regexp search.")))
3625 (viper-unrecord-kbd-macro "//" 'emacs-state)
3627 (viper-unrecord-kbd-macro "///" 'emacs-state))))
3630 (defun viper-search-forward (arg)
3631 "Search a string forward.
3632 ARG is used to find the ARG's occurrence of the string.
3633 Null string will repeat previous search."
3635 (let ((val (viper-P-val arg))
3636 (com (viper-getcom arg))
3637 (old-str viper-s-string))
3638 (setq viper-s-forward t)
3639 (viper-if-string "/")
3640 ;; this is not used at present, but may be used later
3641 (if (or (not (equal old-str viper-s-string))
3642 (not (markerp viper-local-search-start-marker))
3643 (not (marker-buffer viper-local-search-start-marker)))
3644 (setq viper-local-search-start-marker (point-marker)))
3645 (viper-search viper-s-string t val)
3648 (viper-move-marker-locally 'viper-com-point (mark t))
3649 (viper-execute-com 'viper-search-next val com)))))
3651 (defun viper-search-backward (arg)
3652 "Search a string backward.
3653 ARG is used to find the ARG's occurrence of the string.
3654 Null string will repeat previous search."
3656 (let ((val (viper-P-val arg))
3657 (com (viper-getcom arg))
3658 (old-str viper-s-string))
3659 (setq viper-s-forward nil)
3660 (viper-if-string "?")
3661 ;; this is not used at present, but may be used later
3662 (if (or (not (equal old-str viper-s-string))
3663 (not (markerp viper-local-search-start-marker))
3664 (not (marker-buffer viper-local-search-start-marker)))
3665 (setq viper-local-search-start-marker (point-marker)))
3666 (viper-search viper-s-string nil val)
3669 (viper-move-marker-locally 'viper-com-point (mark t))
3670 (viper-execute-com 'viper-search-next val com)))))
3673 ;; Search for COUNT's occurrence of STRING.
3674 ;; Search is forward if FORWARD is non-nil, otherwise backward.
3675 ;; INIT-POINT is the position where search is to start.
3677 ;; (STRING FORW COUNT &optional NO-OFFSET INIT-POINT LIMIT FAIL-IF-NOT-FOUND)
3678 (defun viper-search (string forward arg
3679 &optional no-offset init-point fail-if-not-found)
3680 (if (not (equal string ""))
3681 (let ((val (viper-p-val arg))
3682 (com (viper-getcom arg))
3683 (offset (not no-offset))
3684 (case-fold-search viper-case-fold-search)
3685 (start-point (or init-point (point))))
3686 (viper-deactivate-mark)
3690 (if offset (viper-forward-char-carefully))
3693 (re-search-forward string nil nil val)
3694 (re-search-backward string))
3695 (search-forward string nil nil val)
3696 (search-backward string))
3697 (if (not (equal start-point (point)))
3698 (push-mark start-point t)))
3700 (if (and (not fail-if-not-found) viper-search-wrap-around-t)
3702 (message "Search wrapped around BOTTOM of buffer")
3703 (goto-char (point-min))
3704 (viper-search string forward (cons 1 com) t start-point 'fail)
3705 ;; don't wait in macros
3706 (or executing-kbd-macro
3707 (memq viper-intermediate-command
3709 viper-digit-argument
3710 viper-command-argument))
3712 ;; delete the wrap-around message
3715 (goto-char start-point)
3716 (error "`%s': %s not found"
3718 (if viper-re-search "Pattern" "String"))
3724 (re-search-backward string nil nil val)
3725 (search-backward string nil nil val))
3726 (if (not (equal start-point (point)))
3727 (push-mark start-point t)))
3729 (if (and (not fail-if-not-found) viper-search-wrap-around-t)
3731 (message "Search wrapped around TOP of buffer")
3732 (goto-char (point-max))
3733 (viper-search string forward (cons 1 com) t start-point 'fail)
3734 ;; don't wait in macros
3735 (or executing-kbd-macro
3736 (memq viper-intermediate-command
3738 viper-digit-argument
3739 viper-command-argument))
3741 ;; delete the wrap-around message
3744 (goto-char start-point)
3745 (error "`%s': %s not found"
3747 (if viper-re-search "Pattern" "String"))
3749 ;; pull up or down if at top/bottom of window
3750 (viper-adjust-window)
3751 ;; highlight the result of search
3752 ;; don't wait and don't highlight in macros
3753 (or executing-kbd-macro
3754 (memq viper-intermediate-command
3755 '(viper-repeat viper-digit-argument viper-command-argument))
3756 (viper-flash-search-pattern))
3759 (defun viper-search-next (arg)
3760 "Repeat previous search."
3762 (let ((val (viper-p-val arg))
3763 (com (viper-getcom arg)))
3764 (if (null viper-s-string) (error viper-NoPrevSearch))
3765 (viper-search viper-s-string viper-s-forward arg)
3768 (viper-move-marker-locally 'viper-com-point (mark t))
3769 (viper-execute-com 'viper-search-next val com)))))
3771 (defun viper-search-Next (arg)
3772 "Repeat previous search in the reverse direction."
3774 (let ((val (viper-p-val arg))
3775 (com (viper-getcom arg)))
3776 (if (null viper-s-string) (error viper-NoPrevSearch))
3777 (viper-search viper-s-string (not viper-s-forward) arg)
3780 (viper-move-marker-locally 'viper-com-point (mark t))
3781 (viper-execute-com 'viper-search-Next val com)))))
3784 ;; Search contents of buffer defined by one of Viper's motion commands.
3785 ;; Repeatable via `n' and `N'.
3786 (defun viper-buffer-search-enable (&optional c)
3787 (cond (c (setq viper-buffer-search-char c))
3788 ((null viper-buffer-search-char)
3789 (setq viper-buffer-search-char ?g)))
3790 (define-key viper-vi-basic-map
3791 (cond ((viper-characterp viper-buffer-search-char)
3792 (char-to-string viper-buffer-search-char))
3793 (t (error "viper-buffer-search-char: wrong value type, %s"
3794 viper-buffer-search-char)))
3795 'viper-command-argument)
3796 (aset viper-exec-array viper-buffer-search-char 'viper-exec-buffer-search)
3797 (setq viper-prefix-commands
3798 (cons viper-buffer-search-char viper-prefix-commands)))
3800 ;; This is a Viper wraper for isearch-forward.
3801 (defun viper-isearch-forward (arg)
3802 "Do incremental search forward."
3804 ;; emacs bug workaround
3805 (if (listp arg) (setq arg (car arg)))
3806 (viper-exec-form-in-emacs (list 'isearch-forward arg)))
3808 ;; This is a Viper wraper for isearch-backward."
3809 (defun viper-isearch-backward (arg)
3810 "Do incremental search backward."
3812 ;; emacs bug workaround
3813 (if (listp arg) (setq arg (car arg)))
3814 (viper-exec-form-in-emacs (list 'isearch-backward arg)))
3817 ;; visiting and killing files, buffers
3819 (defun viper-switch-to-buffer ()
3820 "Switch to buffer in the current window."
3822 (let ((other-buffer (other-buffer (current-buffer)))
3825 (funcall viper-read-buffer-function
3826 "Switch to buffer in this window: " other-buffer))
3827 (switch-to-buffer buffer)))
3829 (defun viper-switch-to-buffer-other-window ()
3830 "Switch to buffer in another window."
3832 (let ((other-buffer (other-buffer (current-buffer)))
3835 (funcall viper-read-buffer-function
3836 "Switch to buffer in another window: " other-buffer))
3837 (switch-to-buffer-other-window buffer)))
3839 (defun viper-kill-buffer ()
3842 (let (buffer buffer-name)
3844 (funcall viper-read-buffer-function
3845 (format "Kill buffer \(%s\): "
3846 (buffer-name (current-buffer)))))
3848 (if (null buffer-name)
3850 (get-buffer buffer-name)))
3851 (if (null buffer) (error "`%s': No such buffer" buffer-name))
3852 (if (or (not (buffer-modified-p buffer))
3855 "Buffer `%s' is modified, are you sure you want to kill it? "
3857 (kill-buffer buffer)
3858 (error "Buffer not killed"))))
3864 (defsubst viper-yank (text)
3865 "Yank TEXT silently. This works correctly with Emacs's yank-pop command."
3867 (setq this-command 'yank))
3869 (defun viper-put-back (arg)
3870 "Put back after point/below line."
3872 (let ((val (viper-p-val arg))
3873 (text (if viper-use-register
3874 (cond ((viper-valid-register viper-use-register '(digit))
3876 (- viper-use-register ?1) 'do-not-rotate))
3877 ((viper-valid-register viper-use-register)
3878 (get-register (downcase viper-use-register)))
3879 (t (error viper-InvalidRegister viper-use-register)))
3881 sv-point chars-inserted lines-inserted)
3883 (if viper-use-register
3884 (let ((reg viper-use-register))
3885 (setq viper-use-register nil)
3886 (error viper-EmptyRegister reg))
3888 (setq viper-use-register nil)
3889 (if (viper-end-with-a-newline-p text)
3895 (beginning-of-line))
3896 (if (not (eolp)) (viper-forward-char-carefully)))
3897 (set-marker (viper-mark-marker) (point) (current-buffer))
3898 (viper-set-destructive-command
3899 (list 'viper-put-back val nil viper-use-register nil nil))
3900 (setq sv-point (point))
3901 (viper-loop val (viper-yank text))
3902 (setq chars-inserted (abs (- (point) sv-point))
3903 lines-inserted (abs (count-lines (point) sv-point)))
3904 (if (or (> chars-inserted viper-change-notification-threshold)
3905 (> lines-inserted viper-change-notification-threshold))
3906 (message "Inserted %d character(s), %d line(s)"
3907 chars-inserted lines-inserted)))
3908 ;; Vi puts cursor on the last char when the yanked text doesn't contain a
3909 ;; newline; it leaves the cursor at the beginning when the text contains
3911 (if (viper-same-line (point) (mark))
3912 (or (= (point) (mark)) (viper-backward-char-carefully))
3913 (exchange-point-and-mark)
3915 (back-to-indentation)))
3916 (viper-deactivate-mark))
3918 (defun viper-Put-back (arg)
3919 "Put back at point/above line."
3921 (let ((val (viper-p-val arg))
3922 (text (if viper-use-register
3923 (cond ((viper-valid-register viper-use-register '(digit))
3925 (- viper-use-register ?1) 'do-not-rotate))
3926 ((viper-valid-register viper-use-register)
3927 (get-register (downcase viper-use-register)))
3928 (t (error viper-InvalidRegister viper-use-register)))
3930 sv-point chars-inserted lines-inserted)
3932 (if viper-use-register
3933 (let ((reg viper-use-register))
3934 (setq viper-use-register nil)
3935 (error viper-EmptyRegister reg))
3937 (setq viper-use-register nil)
3938 (if (viper-end-with-a-newline-p text) (beginning-of-line))
3939 (viper-set-destructive-command
3940 (list 'viper-Put-back val nil viper-use-register nil nil))
3941 (set-marker (viper-mark-marker) (point) (current-buffer))
3942 (setq sv-point (point))
3943 (viper-loop val (viper-yank text))
3944 (setq chars-inserted (abs (- (point) sv-point))
3945 lines-inserted (abs (count-lines (point) sv-point)))
3946 (if (or (> chars-inserted viper-change-notification-threshold)
3947 (> lines-inserted viper-change-notification-threshold))
3948 (message "Inserted %d character(s), %d line(s)"
3949 chars-inserted lines-inserted)))
3950 ;; Vi puts cursor on the last char when the yanked text doesn't contain a
3951 ;; newline; it leaves the cursor at the beginning when the text contains
3953 (if (viper-same-line (point) (mark))
3954 (or (= (point) (mark)) (viper-backward-char-carefully))
3955 (exchange-point-and-mark)
3957 (back-to-indentation)))
3958 (viper-deactivate-mark))
3961 ;; Copy region to kill-ring.
3962 ;; If BEG and END do not belong to the same buffer, copy empty region.
3963 (defun viper-copy-region-as-kill (beg end)
3965 (copy-region-as-kill beg end)
3966 (error (copy-region-as-kill beg beg))))
3969 (defun viper-delete-char (arg)
3970 "Delete next character."
3972 (let ((val (viper-p-val arg))
3974 (viper-set-destructive-command
3975 (list 'viper-delete-char val nil nil nil nil))
3976 (if (and viper-ex-style-editing
3977 (> val (viper-chars-in-region (point) (viper-line-pos 'end))))
3978 (setq val (viper-chars-in-region (point) (viper-line-pos 'end))))
3979 (if (and viper-ex-style-motion (eolp))
3980 (if (bolp) (error "") (setq val 0))) ; not bol---simply back 1 ch
3982 (viper-forward-char-carefully val)
3983 (setq end-del-pos (point)))
3984 (if viper-use-register
3986 (cond ((viper-valid-register viper-use-register '((Letter)))
3987 (viper-append-to-register
3988 (downcase viper-use-register) (point) end-del-pos))
3989 ((viper-valid-register viper-use-register)
3991 viper-use-register (point) end-del-pos nil))
3992 (t (error viper-InvalidRegister viper-use-register)))
3993 (setq viper-use-register nil)))
3996 (if viper-ex-style-motion
3997 (if (and (eolp) (not (bolp))) (backward-char 1)))
4000 (defun viper-delete-backward-char (arg)
4001 "Delete previous character. On reaching beginning of line, stop and beep."
4003 (let ((val (viper-p-val arg))
4005 (viper-set-destructive-command
4006 (list 'viper-delete-backward-char val nil nil nil nil))
4008 viper-ex-style-editing
4009 (> val (viper-chars-in-region (viper-line-pos 'start) (point))))
4010 (setq val (viper-chars-in-region (viper-line-pos 'start) (point))))
4012 (viper-backward-char-carefully val)
4013 (setq end-del-pos (point)))
4014 (if viper-use-register
4016 (cond ((viper-valid-register viper-use-register '(Letter))
4017 (viper-append-to-register
4018 (downcase viper-use-register) end-del-pos (point)))
4019 ((viper-valid-register viper-use-register)
4021 viper-use-register end-del-pos (point) nil))
4022 (t (error viper-InvalidRegister viper-use-register)))
4023 (setq viper-use-register nil)))
4024 (if (and (bolp) viper-ex-style-editing)
4026 (delete-backward-char val t)))
4029 (defun viper-del-backward-char-in-insert ()
4030 "Delete 1 char backwards while in insert mode."
4032 (if (and viper-ex-style-editing (bolp))
4034 (delete-backward-char 1 t)))
4037 (defun viper-del-backward-char-in-replace ()
4038 "Delete one character in replace mode.
4039 If `viper-delete-backwards-in-replace' is t, then DEL key actually deletes
4040 charecters. If it is nil, then the cursor just moves backwards, similarly
4041 to Vi. The variable `viper-ex-style-editing', if t, doesn't let the
4042 cursor move past the beginning of line."
4044 (cond (viper-delete-backwards-in-replace
4046 (delete-backward-char 1 t))
4047 (viper-ex-style-editing
4052 (delete-backward-char 1 t))))
4053 (viper-ex-style-editing
4058 (backward-char 1))))
4064 (defun viper-join-lines (arg)
4065 "Join this line to next, if ARG is nil. Otherwise, join ARG lines."
4067 (let ((val (viper-P-val arg)))
4068 (viper-set-destructive-command
4069 (list 'viper-join-lines val nil nil nil nil))
4070 (viper-loop (if (null val) 1 (1- val))
4075 (delete-region (point) (1- (point)))
4077 ;; fixup-whitespace sometimes does not leave space
4078 ;; between objects, so we insert it as in Vi
4079 (or (looking-at " ")
4087 (defun viper-change (beg end)
4088 (if (markerp beg) (setq beg (marker-position beg)))
4089 (if (markerp end) (setq end (marker-position end)))
4090 ;; beg is sometimes (mark t), which may be nil
4091 (or beg (setq beg end))
4093 (viper-set-complex-command-for-undo)
4094 (if viper-use-register
4096 (copy-to-register viper-use-register beg end nil)
4097 (setq viper-use-register nil)))
4098 (viper-set-replace-overlay beg end)
4099 (setq last-command nil) ; separate repl text from prev kills
4101 (if (= (viper-replace-start) (point-max))
4102 (error "End of buffer"))
4104 (setq viper-last-replace-region
4105 (buffer-substring (viper-replace-start)
4106 (viper-replace-end)))
4108 ;; protect against error while inserting "@" and other disasters
4109 ;; (e.g., read-only buff)
4110 (condition-case conds
4111 (if (or viper-allow-multiline-replace-regions
4112 (viper-same-line (viper-replace-start)
4113 (viper-replace-end)))
4115 ;; tabs cause problems in replace, so untabify
4116 (goto-char (viper-replace-end))
4117 (insert-before-markers "@") ; put placeholder after the TAB
4118 (untabify (viper-replace-start) (point))
4119 ;; del @, don't put on kill ring
4120 (delete-backward-char 1)
4122 (viper-set-replace-overlay-glyphs
4123 viper-replace-region-start-delimiter
4124 viper-replace-region-end-delimiter)
4125 ;; this move takes care of the last posn in the overlay, which
4126 ;; has to be shifted because of insert. We can't simply insert
4127 ;; "$" before-markers because then overlay-start will shift the
4128 ;; beginning of the overlay in case we are replacing a single
4129 ;; character. This fixes the bug with `s' and `cl' commands.
4130 (viper-move-replace-overlay (viper-replace-start) (point))
4131 (goto-char (viper-replace-start))
4132 (viper-change-state-to-replace t))
4133 (kill-region (viper-replace-start)
4134 (viper-replace-end))
4135 (viper-hide-replace-overlay)
4136 (viper-change-state-to-insert))
4137 (error ;; make sure that the overlay doesn't stay.
4138 ;; go back to the original point
4139 (goto-char (viper-replace-start))
4140 (viper-hide-replace-overlay)
4141 (viper-message-conditions conds))))
4144 (defun viper-change-subr (beg end)
4145 ;; beg is sometimes (mark t), which may be nil
4146 (or beg (setq beg end))
4147 (if viper-use-register
4149 (copy-to-register viper-use-register beg end nil)
4150 (setq viper-use-register nil)))
4151 (kill-region beg end)
4152 (setq this-command 'viper-change)
4153 (viper-yank-last-insertion))
4155 (defun viper-toggle-case (arg)
4156 "Toggle character case."
4158 (let ((val (viper-p-val arg)) (c))
4159 (viper-set-destructive-command
4160 (list 'viper-toggle-case val nil nil nil nil))
4162 (setq c (following-char))
4164 (if (eq c (upcase c))
4165 (insert-char (downcase c) 1)
4166 (insert-char (upcase c) 1))
4167 (if (eolp) (backward-char 1))
4168 (setq val (1- val)))))
4173 (defun viper-query-replace ()
4175 If a null string is suplied as the string to be replaced,
4176 the query replace mode will toggle between string replace
4177 and regexp replace."
4180 (setq str (viper-read-string-with-history
4181 (if viper-re-query-replace "Query replace regexp: "
4184 'viper-replace1-history
4185 (car viper-replace1-history) ; default
4187 (if (string= str "")
4189 (setq viper-re-query-replace (not viper-re-query-replace))
4190 (message "Query replace mode changed to %s"
4191 (if viper-re-query-replace "regexp replace"
4193 (if viper-re-query-replace
4194 (query-replace-regexp
4196 (viper-read-string-with-history
4197 (format "Query replace regexp `%s' with: " str)
4199 'viper-replace1-history
4200 (car viper-replace1-history) ; default
4204 (viper-read-string-with-history
4205 (format "Query replace `%s' with: " str)
4207 'viper-replace1-history
4208 (car viper-replace1-history) ; default
4214 (defun viper-mark-beginning-of-buffer ()
4215 "Mark beginning of buffer."
4218 (goto-char (point-min))
4219 (exchange-point-and-mark)
4220 (message "Mark set at the beginning of buffer"))
4222 (defun viper-mark-end-of-buffer ()
4223 "Mark end of buffer."
4226 (goto-char (point-max))
4227 (exchange-point-and-mark)
4228 (message "Mark set at the end of buffer"))
4230 (defun viper-mark-point ()
4231 "Set mark at point of buffer."
4233 (let ((char (read-char)))
4234 (cond ((and (<= ?a char) (<= char ?z))
4235 (point-to-register (1+ (- char ?a))))
4236 ((viper= char ?<) (viper-mark-beginning-of-buffer))
4237 ((viper= char ?>) (viper-mark-end-of-buffer))
4238 ((viper= char ?.) (viper-set-mark-if-necessary))
4239 ((viper= char ?,) (viper-cycle-through-mark-ring))
4240 ((viper= char ?^) (push-mark viper-saved-mark t t))
4241 ((viper= char ?D) (mark-defun))
4245 ;; Algorithm: If first invocation of this command save mark on ring, goto
4246 ;; mark, M0, and pop the most recent elt from the mark ring into mark,
4247 ;; making it into the new mark, M1.
4248 ;; Push this mark back and set mark to the original point position, p1.
4249 ;; So, if you hit '' or `` then you can return to p1.
4251 ;; If repeated command, pop top elt from the ring into mark and
4252 ;; jump there. This forgets the position, p1, and puts M1 back into mark.
4253 ;; Then we save the current pos, which is M0, jump to M1 and pop M2 from
4254 ;; the ring into mark. Push M2 back on the ring and set mark to M0.
4256 (defun viper-cycle-through-mark-ring ()
4257 "Visit previous locations on the mark ring.
4258 One can use `` and '' to temporarily jump 1 step back."
4259 (let* ((sv-pt (point)))
4260 ;; if repeated `m,' command, pop the previously saved mark.
4261 ;; Prev saved mark is actually prev saved point. It is used if the
4262 ;; user types `` or '' and is discarded
4263 ;; from the mark ring by the next `m,' command.
4264 ;; In any case, go to the previous or previously saved mark.
4265 ;; Then push the current mark (popped off the ring) and set current
4266 ;; point to be the mark. Current pt as mark is discarded by the next
4268 (if (eq last-command 'viper-cycle-through-mark-ring)
4270 ;; save current mark if the first iteration
4271 (setq mark-ring (delete (viper-mark-marker) mark-ring))
4273 (push-mark (mark t) t)) )
4275 (set-mark-command 1)
4276 ;; don't duplicate mark on the ring
4277 (setq mark-ring (delete (viper-mark-marker) mark-ring))
4279 (viper-deactivate-mark)
4280 (setq this-command 'viper-cycle-through-mark-ring)
4284 (defun viper-goto-mark (arg)
4287 (let ((char (read-char))
4288 (com (viper-getcom arg)))
4289 (viper-goto-mark-subr char com nil)))
4291 (defun viper-goto-mark-and-skip-white (arg)
4292 "Go to mark and skip to first non-white character on line."
4294 (let ((char (read-char))
4295 (com (viper-getCom arg)))
4296 (viper-goto-mark-subr char com t)))
4298 (defun viper-goto-mark-subr (char com skip-white)
4301 (error "Empty buffer")
4303 (cond ((viper-valid-register char '(letter))
4304 (let* ((buff (current-buffer))
4305 (reg (1+ (- char ?a)))
4306 (text-marker (get-register reg)))
4307 ;; If marker points to file that had markers set (and those markers
4308 ;; were saved (as e.g., in session.el), then restore those markers
4309 (if (and (consp text-marker)
4310 (eq (car text-marker) 'file-query)
4311 (or (find-buffer-visiting (nth 1 text-marker))
4312 (y-or-n-p (format "Visit file %s again? "
4313 (nth 1 text-marker)))))
4315 (find-file (nth 1 text-marker))
4316 (when (and (<= (nth 2 text-marker) (point-max))
4317 (<= (point-min) (nth 2 text-marker)))
4318 (setq text-marker (copy-marker (nth 2 text-marker)))
4319 (set-register reg text-marker))))
4320 (if com (viper-move-marker-locally 'viper-com-point (point)))
4321 (if (not (viper-valid-marker text-marker))
4322 (error viper-EmptyTextmarker char))
4323 (if (and (viper-same-line (point) viper-last-jump)
4324 (= (point) viper-last-jump-ignore))
4325 (push-mark viper-last-jump t)
4326 (push-mark nil t)) ; no msg
4327 (viper-register-to-point reg)
4328 (setq viper-last-jump (point-marker))
4330 (back-to-indentation)
4331 (setq viper-last-jump-ignore (point))))
4333 (if (equal buff (current-buffer))
4334 (viper-execute-com (if skip-white
4335 'viper-goto-mark-and-skip-white
4338 (switch-to-buffer buff)
4339 (goto-char viper-com-point)
4340 (viper-change-state-to-vi)
4342 ((and (not skip-white) (viper= char ?`))
4343 (if com (viper-move-marker-locally 'viper-com-point (point)))
4344 (if (and (viper-same-line (point) viper-last-jump)
4345 (= (point) viper-last-jump-ignore))
4346 (goto-char viper-last-jump))
4347 (if (null (mark t)) (error "Mark is not set in this buffer"))
4348 (if (= (point) (mark t)) (pop-mark))
4349 (exchange-point-and-mark)
4350 (setq viper-last-jump (point-marker)
4351 viper-last-jump-ignore 0)
4352 (if com (viper-execute-com 'viper-goto-mark nil com)))
4353 ((and skip-white (viper= char ?'))
4354 (if com (viper-move-marker-locally 'viper-com-point (point)))
4355 (if (and (viper-same-line (point) viper-last-jump)
4356 (= (point) viper-last-jump-ignore))
4357 (goto-char viper-last-jump))
4358 (if (= (point) (mark t)) (pop-mark))
4359 (exchange-point-and-mark)
4360 (setq viper-last-jump (point))
4361 (back-to-indentation)
4362 (setq viper-last-jump-ignore (point))
4363 (if com (viper-execute-com 'viper-goto-mark-and-skip-white nil com)))
4364 (t (error viper-InvalidTextmarker char))))
4366 (defun viper-insert-tab ()
4370 (defun viper-exchange-point-and-mark ()
4372 (exchange-point-and-mark)
4373 (back-to-indentation))
4375 ;; Input Mode Indentation
4377 ;; Returns t, if the string before point matches the regexp STR.
4378 (defsubst viper-looking-back (str)
4379 (and (save-excursion (re-search-backward str nil t))
4380 (= (point) (match-end 0))))
4383 (defun viper-forward-indent ()
4384 "Indent forward -- `C-t' in Vi."
4387 (indent-to (+ (current-column) viper-shift-width)))
4389 (defun viper-backward-indent ()
4390 "Backtab, C-d in VI"
4393 (let ((p (point)) (c (current-column)) bol (indent t))
4394 (if (viper-looking-back "[0^]")
4396 (if (eq ?^ (preceding-char))
4397 (setq viper-preserve-indent t))
4398 (delete-backward-char 1)
4404 (if (re-search-backward "[^ \t]" bol 1) (forward-char))
4405 (delete-region (point) p)
4407 (indent-to (- c viper-shift-width)))
4408 (if (or (bolp) (viper-looking-back "[^ \t]"))
4409 (setq viper-cted nil)))))
4411 (defun viper-autoindent ()
4412 "Auto Indentation, Vi-style."
4414 (let ((col (current-indentation)))
4415 (if abbrev-mode (expand-abbrev))
4416 (if viper-preserve-indent
4417 (setq viper-preserve-indent nil)
4418 (setq viper-current-indent col))
4419 ;; don't leave whitespace lines around
4420 (if (memq last-command
4422 viper-open-line viper-Open-line
4423 viper-replace-state-exit-cmd))
4424 (indent-to-left-margin))
4425 ;; use \n instead of newline, or else <Return> will move the insert point
4428 (if viper-auto-indent
4431 (if (and viper-electric-mode
4433 (memq major-mode '(fundamental-mode
4435 paragraph-indent-text-mode ))))
4436 (indent-according-to-mode)
4437 (indent-to viper-current-indent))
4442 ;; Viewing registers
4444 (defun viper-ket-function (arg)
4445 "Function called by \], the ket. View registers and call \]\]."
4447 (let ((reg (read-char)))
4448 (cond ((viper-valid-register reg '(letter Letter))
4449 (view-register (downcase reg)))
4450 ((viper-valid-register reg '(digit))
4451 (let ((text (current-kill (- reg ?1) 'do-not-rotate)))
4452 (with-output-to-temp-buffer " *viper-info*"
4453 (princ (format "Register %c contains the string:\n" reg))
4457 (viper-next-heading arg))
4459 viper-InvalidRegister reg)))))
4461 (defun viper-brac-function (arg)
4462 "Function called by \[, the brac. View textmarkers and call \[\["
4464 (let ((reg (read-char)))
4465 (cond ((viper= ?\[ reg)
4466 (viper-prev-heading arg))
4468 (viper-heading-end arg))
4469 ((viper-valid-register reg '(letter))
4470 (let* ((val (get-register (1+ (- reg ?a))))
4471 (buf (if (not (markerp val))
4472 (error viper-EmptyTextmarker reg)
4473 (marker-buffer val)))
4474 (pos (marker-position val))
4475 line-no text (s pos) (e pos))
4476 (with-output-to-temp-buffer " *viper-info*"
4481 (setq line-no (1+ (count-lines (point-min) val)))
4484 (if (re-search-backward "[^ \t]" nil t)
4490 (if (re-search-forward "[^ \t]" nil t)
4494 (setq text (buffer-substring s e))
4495 (setq text (format "%s<%c>%s"
4496 (substring text 0 (- pos s))
4497 reg (substring text (- pos s)))))
4500 "Textmarker `%c' is in buffer `%s' at line %d.\n"
4501 reg (buffer-name buf) line-no))
4502 (princ (format "Here is some text around %c:\n\n %s"
4504 (princ (format viper-EmptyTextmarker reg))))
4506 (t (error viper-InvalidTextmarker reg)))))
4510 ;; commands in insertion mode
4512 (defun viper-delete-backward-word (arg)
4513 "Delete previous word."
4518 (delete-region (point) (mark t))
4522 (defun viper-set-expert-level (&optional dont-change-unless)
4523 "Sets the expert level for a Viper user.
4524 Can be called interactively to change (temporarily or permanently) the
4525 current expert level.
4527 The optional argument DONT-CHANGE-UNLESS, if not nil, says that
4528 the level should not be changed, unless its current value is
4529 meaningless (i.e., not one of 1,2,3,4,5).
4531 User level determines the setting of Viper variables that are most
4532 sensitive for VI-style look-and-feel."
4536 (if (not (natnump viper-expert-level)) (setq viper-expert-level 0))
4538 (save-window-excursion
4539 (delete-other-windows)
4540 ;; if 0 < viper-expert-level < viper-max-expert-level
4541 ;; & dont-change-unless = t -- use it; else ask
4542 (viper-ask-level dont-change-unless))
4544 (setq viper-always t
4545 viper-ex-style-motion t
4546 viper-ex-style-editing t
4547 viper-want-ctl-h-help nil)
4549 (cond ((eq viper-expert-level 1) ; novice or beginner
4550 (global-set-key ; in emacs-state
4552 (if (viper-window-display-p) 'viper-iconify 'suspend-emacs))
4553 (setq viper-no-multiple-ESC t
4555 viper-vi-style-in-minibuffer t
4556 viper-search-wrap-around-t t
4557 viper-electric-mode nil
4558 viper-want-emacs-keys-in-vi nil
4559 viper-want-emacs-keys-in-insert nil))
4561 ((and (> viper-expert-level 1) (< viper-expert-level 5))
4562 ;; intermediate to guru
4563 (setq viper-no-multiple-ESC (if (viper-window-display-p)
4565 viper-electric-mode t
4566 viper-want-emacs-keys-in-vi t
4567 viper-want-emacs-keys-in-insert (> viper-expert-level 2))
4569 (if (eq viper-expert-level 4) ; respect user's ex-style motion
4570 ; and viper-no-multiple-ESC
4573 viper-ex-style-editing
4574 (viper-standard-value 'viper-ex-style-editing)
4575 viper-ex-style-motion
4576 (viper-standard-value 'viper-ex-style-motion))
4577 (setq viper-ex-style-motion
4578 (viper-standard-value 'viper-ex-style-motion)
4579 viper-ex-style-editing
4580 (viper-standard-value 'viper-ex-style-editing)
4582 (viper-standard-value 'viper-re-search)
4583 viper-no-multiple-ESC
4584 (viper-standard-value 'viper-no-multiple-ESC)))))
4587 ;; Ideally, if 5 is selected, a buffer should pop up to let the
4588 ;; user toggle the values of variables.
4589 (t (setq-default viper-ex-style-editing
4590 (viper-standard-value 'viper-ex-style-editing)
4591 viper-ex-style-motion
4592 (viper-standard-value 'viper-ex-style-motion))
4593 (setq viper-want-ctl-h-help
4594 (viper-standard-value 'viper-want-ctl-h-help)
4596 (viper-standard-value 'viper-always)
4597 viper-no-multiple-ESC
4598 (viper-standard-value 'viper-no-multiple-ESC)
4599 viper-ex-style-motion
4600 (viper-standard-value 'viper-ex-style-motion)
4601 viper-ex-style-editing
4602 (viper-standard-value 'viper-ex-style-editing)
4604 (viper-standard-value 'viper-re-search)
4606 (viper-standard-value 'viper-electric-mode)
4607 viper-want-emacs-keys-in-vi
4608 (viper-standard-value 'viper-want-emacs-keys-in-vi)
4609 viper-want-emacs-keys-in-insert
4610 (viper-standard-value 'viper-want-emacs-keys-in-insert))))
4612 (viper-set-mode-vars-for viper-current-state)
4613 (if (or viper-always
4614 (and (> viper-expert-level 0) (> 5 viper-expert-level)))
4618 ;; Ask user expert level.
4619 (defun viper-ask-level (dont-change-unless)
4620 (let ((ask-buffer " *viper-ask-level*")
4621 level-changed repeated)
4622 (save-window-excursion
4623 (switch-to-buffer ask-buffer)
4625 (while (or (> viper-expert-level viper-max-expert-level)
4626 (< viper-expert-level 1)
4627 (null dont-change-unless))
4631 (message "Invalid user level")
4634 (setq dont-change-unless t
4637 Please specify your level of familiarity with the venomous VI PERil
4638 (and the VI Plan for Emacs Rescue).
4639 You can change it at any time by typing `M-x viper-set-expert-level RET'
4641 1 -- BEGINNER: Almost all Emacs features are suppressed.
4642 Feels almost like straight Vi. File name completion and
4643 command history in the minibuffer are thrown in as a bonus.
4644 To use Emacs productively, you must reach level 3 or higher.
4645 2 -- MASTER: C-c now has its standard Emacs meaning in Vi command state,
4646 so most Emacs commands can be used when Viper is in Vi state.
4647 Good progress---you are well on the way to level 3!
4648 3 -- GRAND MASTER: Like 3, but most Emacs commands are available also
4649 in Viper's insert state.
4650 4 -- GURU: Like 3, but user settings are respected for viper-no-multiple-ESC,
4651 viper-ex-style-motion, viper-ex-style-editing, and
4652 viper-re-search variables. Adjust these settings to your taste.
4653 5 -- WIZARD: Like 4, but user settings are also respected for viper-always,
4654 viper-electric-mode, viper-want-ctl-h-help, viper-want-emacs-keys-in-vi,
4655 and viper-want-emacs-keys-in-insert. Adjust these to your taste.
4657 Please, specify your level now: ")
4659 (setq viper-expert-level (- (viper-read-char-exclusive) ?0))
4662 ;; tell the user if level was changed
4666 (format "\n\n\n\n\n\t\tYou have selected user level %d"
4667 viper-expert-level))
4668 (if (y-or-n-p "Do you wish to make this change permanent? ")
4669 ;; save the setting for viper-expert-level
4672 (format "Saving user level %d ..." viper-expert-level)
4673 viper-custom-file-name))
4675 (bury-buffer) ; remove ask-buffer from screen
4685 ;; if ENFORCE-BUFFER is not nil, error if CHAR is a marker in another buffer
4686 (defun viper-register-to-point (char &optional enforce-buffer)
4687 "Like jump-to-register, but switches to another buffer in another window."
4688 (interactive "cViper register to point: ")
4689 (let ((val (get-register char)))
4691 ((and (fboundp 'frame-configuration-p)
4692 (frame-configuration-p val))
4693 (set-frame-configuration val))
4694 ((window-configuration-p val)
4695 (set-window-configuration val))
4696 ((viper-valid-marker val)
4697 (if (and enforce-buffer
4698 (not (equal (current-buffer) (marker-buffer val))))
4699 (error (concat viper-EmptyTextmarker " in this buffer")
4701 (pop-to-buffer (marker-buffer val))
4703 ((and (consp val) (eq (car val) 'file))
4704 (find-file (cdr val)))
4706 (error viper-EmptyTextmarker (1- (+ char ?a)))))))
4709 (defun viper-save-kill-buffer ()
4710 "Save then kill current buffer. "
4712 (if (< viper-expert-level 2)
4713 (save-buffers-kill-emacs)
4715 (kill-buffer (current-buffer))))
4721 (defun viper-submit-report ()
4722 "Submit bug report on Viper."
4724 (let ((reporter-prompt-for-summary-p t)
4725 (viper-device-type (viper-device-type))
4726 color-display-p frame-parameters
4727 minibuffer-emacs-face minibuffer-vi-face minibuffer-insert-face
4728 varlist salutation window-config)
4730 ;; If mode info is needed, add variable to `let' and then set it below,
4731 ;; like we did with color-display-p.
4732 (setq color-display-p (if (viper-window-display-p)
4733 (viper-color-display-p)
4735 minibuffer-vi-face (if (viper-has-face-support-p)
4736 (viper-get-face viper-minibuffer-vi-face)
4738 minibuffer-insert-face (if (viper-has-face-support-p)
4740 viper-minibuffer-insert-face)
4742 minibuffer-emacs-face (if (viper-has-face-support-p)
4744 viper-minibuffer-emacs-face)
4746 frame-parameters (if (fboundp 'frame-parameters)
4747 (frame-parameters (selected-frame))))
4749 (setq varlist (list 'viper-vi-minibuffer-minor-mode
4750 'viper-insert-minibuffer-minor-mode
4751 'viper-vi-intercept-minor-mode
4752 'viper-vi-local-user-minor-mode
4753 'viper-vi-kbd-minor-mode
4754 'viper-vi-global-user-minor-mode
4755 'viper-vi-state-modifier-minor-mode
4756 'viper-vi-diehard-minor-mode
4757 'viper-vi-basic-minor-mode
4758 'viper-replace-minor-mode
4759 'viper-insert-intercept-minor-mode
4760 'viper-insert-local-user-minor-mode
4761 'viper-insert-kbd-minor-mode
4762 'viper-insert-global-user-minor-mode
4763 'viper-insert-state-modifier-minor-mode
4764 'viper-insert-diehard-minor-mode
4765 'viper-insert-basic-minor-mode
4766 'viper-emacs-intercept-minor-mode
4767 'viper-emacs-local-user-minor-mode
4768 'viper-emacs-kbd-minor-mode
4769 'viper-emacs-global-user-minor-mode
4770 'viper-emacs-state-modifier-minor-mode
4771 'viper-automatic-iso-accents
4772 'viper-special-input-method
4773 'viper-want-emacs-keys-in-insert
4774 'viper-want-emacs-keys-in-vi
4775 'viper-keep-point-on-undo
4776 'viper-no-multiple-ESC
4777 'viper-electric-mode
4779 'viper-want-ctl-h-help
4780 'viper-ex-style-editing
4781 'viper-delete-backwards-in-replace
4782 'viper-vi-style-in-minibuffer
4783 'viper-vi-state-hook
4784 'viper-insert-state-hook
4785 'viper-replace-state-hook
4786 'viper-emacs-state-hook
4787 'ex-cycle-other-window
4788 'ex-cycle-through-non-files
4795 'minibuffer-insert-face
4796 'minibuffer-emacs-face
4799 Congratulations! You may have unearthed a bug in Viper!
4800 Please mail a concise, accurate summary of the problem to the address above.
4802 -------------------------------------------------------------------")
4803 (setq window-config (current-window-configuration))
4804 (with-output-to-temp-buffer " *viper-info*"
4805 (switch-to-buffer " *viper-info*")
4806 (delete-other-windows)
4808 PLEASE FOLLOW THESE PROCEDURES
4809 ------------------------------
4811 Before reporting a bug, please verify that it is related to Viper, and is
4812 not cause by other packages you are using.
4814 Don't report compilation warnings, unless you are certain that there is a
4815 problem. These warnings are normal and unavoidable.
4817 Please note that users should not modify variables and keymaps other than
4818 those advertised in the manual. Such `customization' is likely to crash
4819 Viper, as it would any other improperly customized Emacs package.
4821 If you are reporting an error message received while executing one of the
4822 Viper commands, type:
4824 M-x set-variable <Return> debug-on-error <Return> t <Return>
4826 Then reproduce the error. The above command will cause Emacs to produce a
4827 back trace of the execution that leads to the error. Please include this
4828 trace in your bug report.
4830 If you believe that one of Viper's commands goes into an infinite loop
4831 \(e.g., Emacs freezes\), type:
4833 M-x set-variable <Return> debug-on-quit <Return> t <Return>
4835 Then reproduce the problem. Wait for a few seconds, then type C-g to abort
4836 the current command. Include the resulting back trace in the bug report.
4838 Mail anyway (y or n)? ")
4839 (if (y-or-n-p "Mail anyway? ")
4841 (set-window-configuration window-config)
4842 (error "Bug report aborted")))
4845 (set-window-configuration window-config)
4847 (reporter-submit-bug-report "kifer@cs.sunysb.edu"
4850 nil 'delete-other-windows
4856 ;; Smoothes out the difference between Emacs' unread-command-events
4857 ;; and XEmacs unread-command-event. Arg is a character, an event, a list of
4858 ;; events or a sequence of keys.
4860 ;; Due to the way unread-command-events in Emacs (not XEmacs), a non-event
4861 ;; symbol in unread-command-events list may cause Emacs to turn this symbol
4862 ;; into an event. Below, we delete nil from event lists, since nil is the most
4863 ;; common symbol that might appear in this wrong context.
4864 (defun viper-set-unread-command-events (arg)
4867 unread-command-events
4869 (cond ((eventp arg) (list arg))
4872 (listify-key-sequence arg))
4874 "viper-set-unread-command-events: Invalid argument, %S"
4876 (if (not (eventp nil))
4877 (setq new-events (delq nil new-events)))
4878 (append new-events unread-command-events)))
4881 unread-command-events
4883 (cond ((viper-characterp arg) (list (character-to-event arg)))
4884 ((eventp arg) (list arg))
4885 ((stringp arg) (mapcar 'character-to-event arg))
4886 ((vectorp arg) (append arg nil)) ; turn into list
4887 ((listp arg) (viper-eventify-list-xemacs arg))
4889 "viper-set-unread-command-events: Invalid argument, %S" arg)))
4890 unread-command-events))))
4892 ;; list is assumed to be a list of events of characters
4893 (defun viper-eventify-list-xemacs (lis)
4896 (cond ((viper-characterp elt) (character-to-event elt))
4899 "viper-eventify-list-xemacs: can't convert to event, %S"
4905 ;;; viper-cmd.el ends here