1 ;;; viper-util.el --- Utilities used by viper.el
3 ;; Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
5 ;; This file is part of GNU Emacs.
7 ;; GNU Emacs is free software; you can redistribute it and/or modify
8 ;; it under the terms of the GNU General Public License as published by
9 ;; the Free Software Foundation; either version 2, or (at your option)
12 ;; GNU Emacs is distributed in the hope that it will be useful,
13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ;; GNU General Public License for more details.
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with GNU Emacs; see the file COPYING. If not, write to the
19 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 ;; Boston, MA 02111-1307, USA.
28 (defvar vip-overriding-map)
29 (defvar pm-color-alist)
30 (defvar zmacs-region-stays)
31 (defvar vip-search-face)
32 (defvar vip-minibuffer-current-face)
33 (defvar vip-minibuffer-insert-face)
34 (defvar vip-minibuffer-vi-face)
35 (defvar vip-minibuffer-emacs-face)
36 (defvar vip-replace-overlay-face)
37 (defvar vip-minibuffer-overlay)
38 (defvar vip-replace-overlay)
39 (defvar vip-search-overlay)
40 (defvar vip-replace-overlay-cursor-color)
41 (defvar vip-intermediate-command)
42 (defvar vip-use-replace-region-delimiters)
43 (defvar vip-fast-keyseq-timeout)
44 (defvar vip-related-files-and-buffers-ring)
45 ;; end compiler pacifier
48 (defconst vip-xemacs-p (string-match "\\(Lucid\\|XEmacs\\)" emacs-version))
50 (defconst vip-emacs-p (not vip-xemacs-p))
51 ;; Tell whether we are running as a window application or on a TTY
52 (defsubst vip-device-type ()
55 (device-type (selected-device))))
56 ;; in XEmacs: device-type is tty on tty and stream in batch.
57 (defun vip-window-display-p ()
58 (and (vip-device-type) (not (memq (vip-device-type) '(tty stream pc)))))
60 (defvar vip-ms-style-os-p (memq system-type '(ms-dos windows-nt windows-95))
61 "Tells if Emacs is running under an MS-style OS: ms-dos, windows-nt, W95.")
62 (defvar vip-vms-os-p (memq system-type '(vax-vms axp-vms))
63 "Tells if Emacs is running under VMS.")
65 (defvar vip-force-faces nil
66 "If t, Viper will think that it is running on a display that supports faces.
67 This is provided as a temporary relief for users of face-capable displays
68 that Viper doesn't know about.")
70 (defun vip-has-face-support-p ()
71 (cond ((vip-window-display-p))
73 (vip-emacs-p (memq (vip-device-type) '(pc)))
74 (vip-xemacs-p (memq (vip-device-type) '(tty pc)))))
79 (defmacro vip-deflocalvar (var default-value &optional documentation)
81 (defvar (, var) (, default-value)
82 (, (format "%s\n\(buffer local\)" documentation)))
83 (make-variable-buffer-local '(, var))
86 (defmacro vip-loop (count body)
87 "(vip-loop COUNT BODY) Execute BODY COUNT times."
88 (list 'let (list (list 'count count))
89 (list 'while '(> count 0)
91 '(setq count (1- count))
94 (defmacro vip-buffer-live-p (buf)
95 (` (and (, buf) (get-buffer (, buf)) (buffer-name (get-buffer (, buf))))))
97 ;; return buffer-specific macro definition, given a full macro definition
98 (defmacro vip-kbd-buf-alist (macro-elt)
99 (` (nth 1 (, macro-elt))))
100 ;; get a pair: (curr-buffer . macro-definition)
101 (defmacro vip-kbd-buf-pair (macro-elt)
102 (` (assoc (buffer-name) (vip-kbd-buf-alist (, macro-elt)))))
103 ;; get macro definition for current buffer
104 (defmacro vip-kbd-buf-definition (macro-elt)
105 (` (cdr (vip-kbd-buf-pair (, macro-elt)))))
107 ;; return mode-specific macro definitions, given a full macro definition
108 (defmacro vip-kbd-mode-alist (macro-elt)
109 (` (nth 2 (, macro-elt))))
110 ;; get a pair: (major-mode . macro-definition)
111 (defmacro vip-kbd-mode-pair (macro-elt)
112 (` (assoc major-mode (vip-kbd-mode-alist (, macro-elt)))))
113 ;; get macro definition for the current major mode
114 (defmacro vip-kbd-mode-definition (macro-elt)
115 (` (cdr (vip-kbd-mode-pair (, macro-elt)))))
117 ;; return global macro definition, given a full macro definition
118 (defmacro vip-kbd-global-pair (macro-elt)
119 (` (nth 3 (, macro-elt))))
120 ;; get global macro definition from an elt of macro-alist
121 (defmacro vip-kbd-global-definition (macro-elt)
122 (` (cdr (vip-kbd-global-pair (, macro-elt)))))
124 ;; last elt of a sequence
125 (defsubst vip-seq-last-elt (seq)
126 (elt seq (1- (length seq))))
128 ;; Check if arg is a valid character for register
129 ;; TYPE is a list that can contain `letter', `Letter', and `digit'.
130 ;; Letter means lowercase letters, Letter means uppercase letters, and
131 ;; digit means digits from 1 to 9.
132 ;; If TYPE is nil, then down/uppercase letters and digits are allowed.
133 (defun vip-valid-register (reg &optional type)
134 (or type (setq type '(letter Letter digit)))
135 (or (if (memq 'letter type)
136 (and (<= ?a reg) (<= reg ?z)))
137 (if (memq 'digit type)
138 (and (<= ?1 reg) (<= reg ?9)))
139 (if (memq 'Letter type)
140 (and (<= ?A reg) (<= reg ?Z)))
143 ;; checks if object is a marker, has a buffer, and points to within that buffer
144 (defun vip-valid-marker (marker)
145 (if (and (markerp marker) (marker-buffer marker))
146 (let ((buf (marker-buffer marker))
147 (pos (marker-position marker)))
150 (and (<= pos (point-max)) (<= (point-min) pos))))))
153 (defvar vip-minibuffer-overlay-priority 300)
154 (defvar vip-replace-overlay-priority 400)
155 (defvar vip-search-overlay-priority 500)
162 (fset 'vip-read-event (symbol-function 'next-command-event))
163 (fset 'vip-make-overlay (symbol-function 'make-extent))
164 (fset 'vip-overlay-start (symbol-function 'extent-start-position))
165 (fset 'vip-overlay-end (symbol-function 'extent-end-position))
166 (fset 'vip-overlay-put (symbol-function 'set-extent-property))
167 (fset 'vip-overlay-p (symbol-function 'extentp))
168 (fset 'vip-overlay-get (symbol-function 'extent-property))
169 (fset 'vip-move-overlay (symbol-function 'set-extent-endpoints))
170 (if (vip-window-display-p)
171 (fset 'vip-iconify (symbol-function 'iconify-frame)))
172 (cond ((vip-has-face-support-p)
173 (fset 'vip-get-face (symbol-function 'get-face))
174 (fset 'vip-color-defined-p
175 (symbol-function 'valid-color-name-p))
177 (fset 'vip-read-event (symbol-function 'read-event))
178 (fset 'vip-make-overlay (symbol-function 'make-overlay))
179 (fset 'vip-overlay-start (symbol-function 'overlay-start))
180 (fset 'vip-overlay-end (symbol-function 'overlay-end))
181 (fset 'vip-overlay-put (symbol-function 'overlay-put))
182 (fset 'vip-overlay-p (symbol-function 'overlayp))
183 (fset 'vip-overlay-get (symbol-function 'overlay-get))
184 (fset 'vip-move-overlay (symbol-function 'move-overlay))
185 (if (vip-window-display-p)
186 (fset 'vip-iconify (symbol-function 'iconify-or-deiconify-frame)))
187 (cond ((vip-has-face-support-p)
188 (fset 'vip-get-face (symbol-function 'internal-get-face))
189 (fset 'vip-color-defined-p (symbol-function 'x-color-defined-p))
192 (fset 'vip-characterp
194 (if vip-xemacs-p 'characterp 'integerp)))
196 (defsubst vip-color-display-p ()
199 (eq (device-class (selected-device)) 'color)))
201 (defsubst vip-get-cursor-color ()
203 (cdr (assoc 'cursor-color (frame-parameters)))
204 (color-instance-name (frame-property (selected-frame) 'cursor-color))))
206 (defun vip-set-face-pixmap (face pixmap)
207 "Set face pixmap on a monochrome display."
208 (if (and (vip-window-display-p) (not (vip-color-display-p)))
210 (set-face-background-pixmap face pixmap)
212 (message "Pixmap not found for %S: %s" (face-name face) pixmap)
217 (cond ((eq (vip-device-type) 'pm)
218 (fset 'vip-color-defined-p
219 (function (lambda (color) (assoc color pm-color-alist))))))
221 ;; needed to smooth out the difference between Emacs and XEmacs
222 (defsubst vip-italicize-face (face)
224 (make-face-italic face)
225 (make-face-italic face nil 'noerror)))
227 ;; test if display is color and the colors are defined
228 (defsubst vip-can-use-colors (&rest colors)
229 (if (vip-color-display-p)
230 (not (memq nil (mapcar 'vip-color-defined-p colors)))
233 (defun vip-hide-face (face)
234 (if (and (vip-has-face-support-p) vip-emacs-p)
235 (add-to-list 'facemenu-unlisted-faces face)))
238 (defun vip-change-cursor-color (new-color)
239 (if (and (vip-window-display-p) (vip-color-display-p)
240 (stringp new-color) (vip-color-defined-p new-color)
241 (not (string= new-color (vip-get-cursor-color))))
242 (modify-frame-parameters
243 (selected-frame) (list (cons 'cursor-color new-color)))))
245 (defsubst vip-save-cursor-color ()
246 (if (and (vip-window-display-p) (vip-color-display-p))
247 (let ((color (vip-get-cursor-color)))
248 (if (and (stringp color) (vip-color-defined-p color)
249 (not (string= color vip-replace-overlay-cursor-color)))
250 (vip-overlay-put vip-replace-overlay 'vip-cursor-color color)))))
252 ;; restore cursor color from replace overlay
253 (defsubst vip-restore-cursor-color-after-replace ()
254 (vip-change-cursor-color
255 (vip-overlay-get vip-replace-overlay 'vip-cursor-color)))
256 (defsubst vip-restore-cursor-color-after-insert ()
257 (vip-change-cursor-color vip-saved-cursor-color))
260 ;; Check the current version against the major and minor version numbers
261 ;; using op: cur-vers op major.minor If emacs-major-version or
262 ;; emacs-minor-version are not defined, we assume that the current version
263 ;; is hopelessly outdated. We assume that emacs-major-version and
264 ;; emacs-minor-version are defined. Otherwise, for Emacs/XEmacs 19, if the
265 ;; current minor version is < 10 (xemacs) or < 23 (emacs) the return value
266 ;; will be nil (when op is =, >, or >=) and t (when op is <, <=), which may be
267 ;; incorrect. However, this gives correct result in our cases, since we are
268 ;; testing for sufficiently high Emacs versions.
269 (defun vip-check-version (op major minor &optional type-of-emacs)
270 (if (and (boundp 'emacs-major-version) (boundp 'emacs-minor-version))
271 (and (cond ((eq type-of-emacs 'xemacs) vip-xemacs-p)
272 ((eq type-of-emacs 'emacs) vip-emacs-p)
274 (cond ((eq op '=) (and (= emacs-minor-version minor)
275 (= emacs-major-version major)))
276 ((memq op '(> >= < <=))
277 (and (or (funcall op emacs-major-version major)
278 (= emacs-major-version major))
279 (if (= emacs-major-version major)
280 (funcall op emacs-minor-version minor)
283 (error "%S: Invalid op in vip-check-version" op))))
284 (cond ((memq op '(= > >=)) nil)
285 ((memq op '(< <=)) t))))
287 ;;;; warn if it is a wrong version of emacs
288 ;;(if (or (vip-check-version '< 19 29 'emacs)
289 ;; (vip-check-version '< 19 12 'xemacs))
291 ;; (with-output-to-temp-buffer " *vip-info*"
292 ;; (switch-to-buffer " *vip-info*")
296 ;;This version of Viper requires
298 ;;\t Emacs 19.29 and higher
300 ;;\t XEmacs 19.12 and higher
302 ;;It is unlikely to work under Emacs version %s
303 ;;that you are using... " emacs-version))
305 ;; (if noninteractive
309 ;; (insert "\n\nType any key to continue... ")
310 ;; (vip-read-event)))
311 ;; (kill-buffer " *vip-info*")))
314 (defun vip-get-visible-buffer-window (wind)
316 (get-buffer-window wind t)
317 (get-buffer-window wind 'visible)))
320 ;; Return line position.
321 ;; If pos is 'start then returns position of line start.
322 ;; If pos is 'end, returns line end. If pos is 'mid, returns line center.
323 ;; Pos = 'indent returns beginning of indentation.
324 ;; Otherwise, returns point. Current point is not moved in any case."
325 (defun vip-line-pos (pos)
326 (let ((cur-pos (point))
334 (goto-char (+ (vip-line-pos 'start) (vip-line-pos 'end) 2)))
336 (back-to-indentation))
338 (setq result (point))
343 ;; Like move-marker but creates a virgin marker if arg isn't already a marker.
344 ;; The first argument must eval to a variable name.
345 ;; Arguments: (var-name position &optional buffer).
347 ;; This is useful for moving markers that are supposed to be local.
348 ;; For this, VAR-NAME should be made buffer-local with nil as a default.
349 ;; Then, each time this var is used in `vip-move-marker-locally' in a new
350 ;; buffer, a new marker will be created.
351 (defun vip-move-marker-locally (var pos &optional buffer)
352 (if (markerp (eval var))
354 (set var (make-marker)))
355 (move-marker (eval var) pos buffer))
358 ;; Print CONDITIONS as a message.
359 (defun vip-message-conditions (conditions)
360 (let ((case (car conditions)) (msg (cdr conditions)))
363 (message "%s: %s" case (mapconcat 'prin1-to-string msg " ")))
368 ;;; List/alist utilities
370 ;; Convert LIST to an alist
371 (defun vip-list-to-alist (lst)
374 (setq alist (cons (list (car lst)) alist))
375 (setq lst (cdr lst)))
378 ;; Convert ALIST to a list.
379 (defun vip-alist-to-list (alst)
382 (setq lst (cons (car (car alst)) lst))
383 (setq alst (cdr alst)))
386 ;; Filter ALIST using REGEXP. Return alist whose elements match the regexp.
387 (defun vip-filter-alist (regexp alst)
389 (let ((outalst) (inalst alst))
391 (if (string-match regexp (car (car inalst)))
392 (setq outalst (cons (car inalst) outalst)))
393 (setq inalst (cdr inalst)))
396 ;; Filter LIST using REGEXP. Return list whose elements match the regexp.
397 (defun vip-filter-list (regexp lst)
399 (let ((outlst) (inlst lst))
401 (if (string-match regexp (car inlst))
402 (setq outlst (cons (car inlst) outlst)))
403 (setq inlst (cdr inlst)))
407 ;; Append LIS2 to LIS1, both alists, by side-effect and returns LIS1
408 ;; LIS2 is modified by filtering it: deleting its members of the form
409 ;; \(car elt\) such that (car elt') is in LIS1.
410 (defun vip-append-filter-alist (lis1 lis2)
414 ;;filter-append the second list
416 ;; delete all occurrences
417 (while (setq elt (assoc (car (car temp)) lis2))
418 (setq lis2 (delq elt lis2)))
419 (setq temp (cdr temp)))
424 ;;; Support for :e and file globbing
426 (defun vip-ex-nontrivial-find-file-unix (filespec)
427 "Glob the file spec and visit all files matching the spec.
428 This function is designed to work under Unix. It may also work under VMS.
430 Users who prefer other types of shells should write their own version of this
431 function and set the variable `ex-nontrivial-find-file-function'
434 (cond (ex-unix-type-shell shell-file-name)
435 ((memq system-type '(vax-vms axp-vms)) "*dcl*") ; VAX VMS
436 (t "sh"))) ; probably Unix anyway
438 ;; using cond in anticipation of further additions
439 (cond (ex-unix-type-shell-options)
441 (command (cond (vip-ms-style-os-p (format "\"ls -1 -d %s\"" filespec))
442 (t (format "ls -1 -d %s" filespec))))
445 (set-buffer (get-buffer-create vip-ex-tmp-buf-name))
449 (call-process gshell nil t nil
453 (call-process gshell nil t nil
456 (goto-char (point-min))
457 ;; Issue an error, if no match.
460 (skip-chars-forward " \t\n\j")
461 (if (looking-at "ls:")
462 (vip-forward-Word 1))
467 (buffer-substring (point) (vip-line-pos 'end)))
469 (goto-char (point-min))
470 (setq file-list (vip-get-filenames-from-buffer 'one-per-line)))
472 (mapcar 'find-file file-list)
475 (defun vip-ex-nontrivial-find-file-ms (filespec)
476 "Glob the file spec and visit all files matching the spec.
477 This function is designed to work under MS type systems, such as NT, W95, and
478 DOS. It may also work under OS/2.
480 The users of Unix-type shells should be able to use
481 `vip-ex-nontrivial-find-file-unix', making it into the value of the variable
482 `ex-nontrivial-find-file-function'. If this doesn't work, the user may have
483 to write a custom function, similar to `vip-ex-nontrivial-find-file-unix'."
485 (set-buffer (get-buffer-create vip-ex-tmp-buf-name))
488 (goto-char (point-min))
490 (vip-glob-ms-windows-files (vip-get-filenames-from-buffer)))
494 ;; Interpret the stuff in the buffer as a list of file names
495 ;; return a list of file names listed in the buffer beginning at point
496 ;; If optional arg is supplied, assume each filename is listed on a separate
498 (defun vip-get-filenames-from-buffer (&optional one-per-line)
499 (let ((skip-chars (if one-per-line "\t\n" " \t\n"))
501 (skip-chars-forward skip-chars)
503 (if (cond ((looking-at "\"")
505 (re-search-forward "[^\"]+" nil t)) ; noerror
508 (re-search-forward "[^']+" nil t)) ; noerror
511 (concat "[^" skip-chars "]+") nil t))) ;noerror
513 (buffer-substring (match-beginning 0) (match-end 0))))
516 (skip-chars-forward " \t\n")
517 (setq result (cons fname result)))
520 ;; convert MS-DOS wildcards to regexp
521 (defun vip-wildcard-to-regexp (wcard)
523 (set-buffer (get-buffer-create vip-ex-tmp-buf-name))
526 (goto-char (point-min))
528 (skip-chars-forward "^*?.\\\\")
529 (cond ((eq (char-after (point)) ?*) (insert ".")(forward-char 1))
530 ((eq (char-after (point)) ?.) (insert "\\")(forward-char 1))
531 ((eq (char-after (point)) ?\\) (insert "\\")(forward-char 1))
532 ((eq (char-after (point)) ??) (delete-char 1)(insert ".")))
538 ;; glob windows files
539 ;; LIST is expected to be in reverse order
540 (defun vip-glob-ms-windows-files (list)
545 (setq tmp2 (cons (directory-files
546 ;; the directory part
547 (or (file-name-directory (car tmp))
549 t ; return full names
550 ;; the regexp part: globs the file names
552 (vip-wildcard-to-regexp
553 (file-name-nondirectory (car tmp)))
556 (setq tmp (cdr tmp)))
557 (reverse (apply 'append tmp2))))
559 (defun vip-convert-standard-file-name (fname)
561 (convert-standard-filename fname)
562 ;; hopefully, XEmacs adds this functionality
569 ;; Rotate RING's index. DIRection can be positive or negative.
570 (defun vip-ring-rotate1 (ring dir)
571 (if (and (ring-p ring) (> (ring-length ring) 0))
573 (setcar ring (cond ((> dir 0)
574 (ring-plus1 (car ring) (ring-length ring)))
576 (ring-minus1 (car ring) (ring-length ring)))
577 ;; don't rotate if dir = 0
579 (vip-current-ring-item ring)
582 (defun vip-special-ring-rotate1 (ring dir)
583 (if (memq vip-intermediate-command
584 '(repeating-display-destructive-command
585 repeating-insertion-from-ring))
586 (vip-ring-rotate1 ring dir)
587 ;; don't rotate otherwise
588 (vip-ring-rotate1 ring 0)))
590 ;; current ring item; if N is given, then so many items back from the
592 (defun vip-current-ring-item (ring &optional n)
594 (if (and (ring-p ring) (> (ring-length ring) 0))
595 (aref (cdr (cdr ring)) (mod (- (car ring) 1 n) (ring-length ring)))))
597 ;; push item onto ring. the second argument is a ring-variable, not value.
598 (defun vip-push-onto-ring (item ring-var)
599 (or (ring-p (eval ring-var))
600 (set ring-var (make-ring (eval (intern (format "%S-size" ring-var))))))
601 (or (null item) ; don't push nil
602 (and (stringp item) (string= item "")) ; or empty strings
603 (equal item (vip-current-ring-item (eval ring-var))) ; or old stuff
604 ;; Since vip-set-destructive-command checks if we are inside vip-repeat,
605 ;; we don't check whether this-command-keys is a `.'.
606 ;; The cmd vip-repeat makes a call to the current function only if
607 ;; `.' is executing a command from the command history. It doesn't
608 ;; call the push-onto-ring function if `.' is simply repeating the
609 ;; last destructive command.
610 ;; We only check for ESC (which happens when we do insert with a
611 ;; prefix argument, or if this-command-keys doesn't give anything
612 ;; meaningful (in that case we don't know what to show to the user).
613 (and (eq ring-var 'vip-command-ring)
614 (string-match "\\([0-9]*\e\\|^[ \t]*$\\|escape\\)"
615 (vip-array-to-string (this-command-keys))))
616 (vip-ring-insert (eval ring-var) item))
620 ;; removing elts from ring seems to break it
621 (defun vip-cleanup-ring (ring)
622 (or (< (ring-length ring) 2)
623 (null (vip-current-ring-item ring))
624 ;; last and previous equal
625 (if (equal (vip-current-ring-item ring) (vip-current-ring-item ring 1))
626 (vip-ring-pop ring))))
628 ;; ring-remove seems to be buggy, so we concocted this for our purposes.
629 (defun vip-ring-pop (ring)
630 (let* ((ln (ring-length ring))
631 (vec (cdr (cdr ring)))
632 (veclen (length vec))
634 (idx (max 0 (ring-minus1 hd ln)))
635 (top-elt (aref vec idx)))
638 (while (< (1+ idx) veclen)
639 (aset vec idx (aref vec (1+ idx)))
643 (setq hd (max 0 (ring-minus1 hd ln)))
644 (if (= hd (1- ln)) (setq hd 0))
645 (setcar ring hd) ; move head
646 (setcar (cdr ring) (max 0 (1- ln))) ; adjust length
650 (defun vip-ring-insert (ring item)
651 (let* ((ln (ring-length ring))
652 (vec (cdr (cdr ring)))
653 (veclen (length vec))
655 (vecpos-after-hd (if (= hd 0) ln hd))
660 (aset vec hd item) ; hd is always 1+ the actual head index in vec
661 (setcar ring (ring-plus1 hd ln)))
662 (setcar (cdr ring) (1+ ln))
663 (setcar ring (ring-plus1 vecpos-after-hd (1+ ln)))
664 (while (and (>= idx vecpos-after-hd) (> ln 0))
665 (aset vec idx (aref vec (1- idx)))
667 (aset vec vecpos-after-hd item))
673 ;; If STRING is longer than MAX-LEN, truncate it and print ...... instead
674 ;; PRE-STRING is a string to prepend to the abbrev string.
675 ;; POST-STRING is a string to append to the abbrev string.
676 ;; ABBREV_SIGN is a string to be inserted before POST-STRING
677 ;; if the orig string was truncated.
678 (defun vip-abbreviate-string (string max-len
679 pre-string post-string abbrev-sign)
683 (substring string 0 (min max-len (length string)))))
684 (cond ((null truncated-str) "")
685 ((> (length string) max-len)
687 pre-string truncated-str abbrev-sign post-string))
688 (t (format "%s%s%s" pre-string truncated-str post-string)))))
690 ;; tells if we are over a whitespace-only line
691 (defsubst vip-over-whitespace-line ()
694 (looking-at "^[ \t]*$")))
697 ;;; Saving settings in custom file
699 ;; Save the current setting of VAR in CUSTOM-FILE.
700 ;; If given, MESSAGE is a message to be displayed after that.
701 ;; This message is erased after 2 secs, if erase-msg is non-nil.
702 ;; Arguments: var message custom-file &optional erase-message
703 (defun vip-save-setting (var message custom-file &optional erase-msg)
704 (let* ((var-name (symbol-name var))
705 (var-val (if (boundp var) (eval var)))
706 (regexp (format "^[^;]*%s[ \t\n]*[a-zA-Z---_']*[ \t\n)]" var-name))
707 (buf (find-file-noselect (substitute-in-file-name custom-file)))
712 (goto-char (point-min))
713 (if (re-search-forward regexp nil t)
714 (let ((reg-end (1- (match-end 0))))
715 (search-backward var-name)
716 (delete-region (match-beginning 0) reg-end)
717 (goto-char (match-beginning 0))
718 (insert (format "%s '%S" var-name var-val)))
719 (goto-char (point-max))
720 (if (not (bolp)) (insert "\n"))
721 (insert (format "(setq %s '%S)\n" var-name var-val)))
730 ;; Save STRING in CUSTOM-FILE. If PATTERN is non-nil, remove strings that
731 ;; match this pattern.
732 (defun vip-save-string-in-file (string custom-file &optional pattern)
733 (let ((buf (find-file-noselect (substitute-in-file-name custom-file))))
736 (goto-char (point-min))
737 (if pattern (delete-matching-lines pattern))
738 (goto-char (point-max))
739 (if string (insert string))
749 (defun vip-flash-search-pattern ()
750 (if (vip-overlay-p vip-search-overlay)
751 (vip-move-overlay vip-search-overlay (match-beginning 0) (match-end 0))
752 (setq vip-search-overlay
754 (match-beginning 0) (match-end 0) (current-buffer))))
756 (vip-overlay-put vip-search-overlay 'priority vip-search-overlay-priority)
757 (if (vip-has-face-support-p)
759 (vip-overlay-put vip-search-overlay 'face vip-search-face)
761 (vip-overlay-put vip-search-overlay 'face nil))))
766 (defsubst vip-move-replace-overlay (beg end)
767 (vip-move-overlay vip-replace-overlay beg end))
769 (defun vip-set-replace-overlay (beg end)
770 (if (vip-overlay-p vip-replace-overlay)
771 (vip-move-replace-overlay beg end)
772 (setq vip-replace-overlay (vip-make-overlay beg end (current-buffer)))
775 vip-replace-overlay (if vip-emacs-p 'evaporate 'detachable) nil)
777 vip-replace-overlay 'priority vip-replace-overlay-priority))
778 (if (vip-has-face-support-p)
779 (vip-overlay-put vip-replace-overlay 'face vip-replace-overlay-face))
780 (vip-save-cursor-color)
781 (vip-change-cursor-color vip-replace-overlay-cursor-color)
785 (defsubst vip-set-replace-overlay-glyphs (before-glyph after-glyph)
786 (if (or (not (vip-has-face-support-p))
787 vip-use-replace-region-delimiters)
788 (let ((before-name (if vip-xemacs-p 'begin-glyph 'before-string))
789 (after-name (if vip-xemacs-p 'end-glyph 'after-string)))
790 (vip-overlay-put vip-replace-overlay before-name before-glyph)
791 (vip-overlay-put vip-replace-overlay after-name after-glyph))))
793 (defsubst vip-hide-replace-overlay ()
794 (vip-set-replace-overlay-glyphs nil nil)
795 (vip-restore-cursor-color-after-replace)
796 (vip-restore-cursor-color-after-insert)
797 (if (vip-has-face-support-p)
798 (vip-overlay-put vip-replace-overlay 'face nil)))
801 (defsubst vip-replace-start ()
802 (vip-overlay-start vip-replace-overlay))
803 (defsubst vip-replace-end ()
804 (vip-overlay-end vip-replace-overlay))
809 (defun vip-set-minibuffer-overlay ()
810 (vip-check-minibuffer-overlay)
811 (if (vip-has-face-support-p)
814 vip-minibuffer-overlay 'face vip-minibuffer-current-face)
816 vip-minibuffer-overlay 'priority vip-minibuffer-overlay-priority)
819 vip-minibuffer-overlay (if vip-emacs-p 'evaporate 'detachable) nil)
820 ;; make vip-minibuffer-overlay open-ended
821 ;; In emacs, it is made open ended at creation time
824 (vip-overlay-put vip-minibuffer-overlay 'start-open nil)
825 (vip-overlay-put vip-minibuffer-overlay 'end-open nil)))
828 (defun vip-check-minibuffer-overlay ()
829 (or (vip-overlay-p vip-minibuffer-overlay)
830 (setq vip-minibuffer-overlay
832 (vip-make-overlay 1 (1+ (buffer-size)) (current-buffer))
833 ;; make overlay open-ended
835 1 (1+ (buffer-size)) (current-buffer) nil 'rear-advance)))
839 (defsubst vip-is-in-minibuffer ()
840 (string-match "\*Minibuf-" (buffer-name)))
844 ;;; XEmacs compatibility
846 (defun vip-abbreviate-file-name (file)
848 (abbreviate-file-name file)
849 ;; XEmacs requires addl argument
850 (abbreviate-file-name file t)))
852 ;; Sit for VAL milliseconds. XEmacs doesn't support the millisecond arg
853 ;; in sit-for, so this function smoothes out the differences.
854 (defsubst vip-sit-for-short (val &optional nodisp)
856 (sit-for (/ val 1000.0) nodisp)
857 (sit-for 0 val nodisp)))
859 ;; EVENT may be a single event of a sequence of events
860 (defsubst vip-ESC-event-p (event)
861 (let ((ESC-keys '(?\e (control \[) escape))
862 (key (vip-event-key event)))
863 (member key ESC-keys)))
866 (defsubst vip-mark-marker ()
871 ;; like (set-mark-command nil) but doesn't push twice, if (car mark-ring)
872 ;; is the same as (mark t).
873 (defsubst vip-set-mark-if-necessary ()
874 (setq mark-ring (delete (vip-mark-marker) mark-ring))
875 (set-mark-command nil))
877 ;; In transient mark mode (zmacs mode), it is annoying when regions become
878 ;; highlighted due to Viper's pushing marks. So, we deactivate marks, unless
879 ;; the user explicitly wants highlighting, e.g., by hitting '' or ``
880 (defun vip-deactivate-mark ()
882 (zmacs-deactivate-region)
885 (defsubst vip-leave-region-active ()
887 (setq zmacs-region-stays t)))
890 (defsubst vip-events-to-keys (events)
891 (cond (vip-xemacs-p (events-to-keys events))
895 (defun vip-eval-after-load (file form)
897 (eval-after-load file form)
898 (or (assoc file after-load-alist)
899 (setq after-load-alist (cons (list file) after-load-alist)))
900 (let ((elt (assoc file after-load-alist)))
901 (or (member form (cdr elt))
902 (setq elt (nconc elt (list form)))))
906 ;; This is here because Emacs changed the way local hooks work.
908 ;;Add to the value of HOOK the function FUNCTION.
909 ;;FUNCTION is not added if already present.
910 ;;FUNCTION is added (if necessary) at the beginning of the hook list
911 ;;unless the optional argument APPEND is non-nil, in which case
912 ;;FUNCTION is added at the end.
914 ;;HOOK should be a symbol, and FUNCTION may be any valid function. If
915 ;;HOOK is void, it is first set to nil. If HOOK's value is a single
916 ;;function, it is changed to a list of functions."
917 (defun vip-add-hook (hook function &optional append)
918 (if (not (boundp hook)) (set hook nil))
919 ;; If the hook value is a single function, turn it into a list.
920 (let ((old (symbol-value hook)))
921 (if (or (not (listp old)) (eq (car old) 'lambda))
922 (setq old (list old)))
923 (if (member function old)
926 (append old (list function)) ; don't nconc
927 (cons function old))))))
929 ;; This is here because of Emacs's changes in the semantics of add/remove-hooks
930 ;; and due to the bugs they introduced.
932 ;; Remove from the value of HOOK the function FUNCTION.
933 ;; HOOK should be a symbol, and FUNCTION may be any valid function. If
934 ;; FUNCTION isn't the value of HOOK, or, if FUNCTION doesn't appear in the
935 ;; list of hooks to run in HOOK, then nothing is done. See `vip-add-hook'."
936 (defun vip-remove-hook (hook function)
937 (if (or (not (boundp hook)) ;unbound symbol, or
938 (null (symbol-value hook)) ;value is nil, or
939 (null function)) ;function is nil, then
941 (let ((hook-value (symbol-value hook)))
942 (if (consp hook-value)
943 ;; don't side-effect the list
944 (setq hook-value (delete function (copy-sequence hook-value)))
945 (if (equal hook-value function)
946 (setq hook-value nil)))
947 (set hook hook-value))))
951 ;; like read-event, but in XEmacs also try to convert to char, if possible
952 (defun vip-read-event-convert-to-char ()
956 (setq event (next-command-event))
957 (or (event-to-character event)
961 ;; This function lets function-key-map convert key sequences into logical
962 ;; keys. This does a better job than vip-read-event when it comes to kbd
963 ;; macros, since it enables certain macros to be shared between X and TTY modes
964 ;; by correctly mapping key sequences for Left/Right/... (one an ascii
965 ;; terminal) into logical keys left, right, etc.
966 (defun vip-read-key ()
967 (let ((overriding-local-map vip-overriding-map)
970 (use-global-map vip-overriding-map)
971 (setq key (elt (read-key-sequence nil) 0))
972 (use-global-map global-map)
976 ;; Emacs has a bug in eventp, which causes (eventp nil) to return (nil)
977 ;; instead of nil, if '(nil) was previously inadvertently assigned to
978 ;; unread-command-events
979 (defun vip-event-key (event)
980 (or (and event (eventp event))
981 (error "vip-event-key: Wrong type argument, eventp, %S" event))
982 (let ((mod (event-modifiers event))
987 (cond ((key-press-event-p event)
989 ((button-event-p event)
990 (concat "mouse-" (prin1-to-string (event-button event))))
992 (error "vip-event-key: Unknown event, %S" event))))
994 ;; Emacs doesn't handle capital letters correctly, since
995 ;; \S-a isn't considered the same as A (it behaves as
996 ;; plain `a' instead). So we take care of this here
997 (cond ((and (vip-characterp event) (<= ?A event) (<= event ?Z))
1000 ;; Emacs has the oddity whereby characters 128+char
1001 ;; represent M-char *if* this appears inside a string.
1002 ;; So, we convert them manually to (meta char).
1003 ((and (vip-characterp event) (< ?\C-? event) (<= event 255))
1005 event (- event ?\C-? 1)))
1006 (t (event-basic-type event)))
1008 (if (vip-characterp basis)
1011 (list 'control '\?) ; taking care of an emacs bug
1012 (intern (char-to-string basis)))))
1014 (append mod (list basis))
1017 (defun vip-key-to-emacs-key (key)
1018 (let (key-name char-p modifiers mod-char-list base-key base-key-name)
1019 (cond (vip-xemacs-p key)
1021 (setq key-name (symbol-name key))
1022 (if (= (length key-name) 1) ; character event
1023 (string-to-char key-name)
1026 (setq modifiers (subseq key 0 (1- (length key)))
1027 base-key (vip-seq-last-elt key)
1028 base-key-name (symbol-name base-key)
1029 char-p (= (length base-key-name) 1))
1032 '(lambda (elt) (upcase (substring (symbol-name elt) 0 1)))
1036 (car (read-from-string
1039 (mapconcat 'identity mod-char-list "-\\")
1045 (mapconcat 'identity mod-char-list "-")
1051 ;; Args can be a sequence of events, a string, or a Viper macro. Will try to
1052 ;; convert events to keys and, if all keys are regular printable
1053 ;; characters, will return a string. Otherwise, will return a string
1054 ;; representing a vector of converted events. If the input was a Viper macro,
1055 ;; will return a string that represents this macro as a vector.
1056 (defun vip-array-to-string (event-seq)
1058 (cond ((stringp event-seq) event-seq)
1059 ((vip-event-vector-p event-seq)
1060 (setq temp (mapcar 'vip-event-key event-seq))
1061 (cond ((vip-char-symbol-sequence-p temp)
1062 (mapconcat 'symbol-name temp ""))
1063 ((and (vip-char-array-p
1064 (setq temp2 (mapcar 'vip-key-to-character temp))))
1065 (mapconcat 'char-to-string temp2 ""))
1066 (t (prin1-to-string (vconcat temp)))))
1067 ((vip-char-symbol-sequence-p event-seq)
1068 (mapconcat 'symbol-name event-seq ""))
1069 ((and (vectorp event-seq)
1071 (setq temp (mapcar 'vip-key-to-character event-seq))))
1072 (mapconcat 'char-to-string temp ""))
1073 (t (prin1-to-string event-seq)))))
1075 (defun vip-key-press-events-to-chars (events)
1076 (mapconcat (if vip-emacs-p
1079 (lambda (elt) (char-to-string (event-to-character elt)))))
1084 (defsubst vip-fast-keysequence-p ()
1085 (not (vip-sit-for-short vip-fast-keyseq-timeout t)))
1087 (defun vip-read-char-exclusive ()
1089 (echo-keystrokes 1))
1092 (setq char (read-char))
1094 ;; skip event if not char
1098 ;; key is supposed to be in viper's representation, e.g., (control l), a
1100 (defun vip-key-to-character (key)
1101 (cond ((eq key 'space) ?\ )
1102 ((eq key 'delete) ?\C-?)
1103 ((eq key 'backspace) ?\C-h)
1105 (= 1 (length (symbol-name key))))
1106 (string-to-char (symbol-name key)))
1108 (eq (car key) 'control)
1109 (symbol-name (nth 1 key))
1110 (= 1 (length (symbol-name (nth 1 key)))))
1111 (read (format "?\\C-%s" (symbol-name (nth 1 key)))))
1115 (defun vip-setup-master-buffer (&rest other-files-or-buffers)
1116 "Set up the current buffer as a master buffer.
1117 Arguments become related buffers. This function should normally be used in
1118 the `Local variables' section of a file."
1119 (setq vip-related-files-and-buffers-ring
1120 (make-ring (1+ (length other-files-or-buffers))))
1121 (mapcar '(lambda (elt)
1122 (vip-ring-insert vip-related-files-and-buffers-ring elt))
1123 other-files-or-buffers)
1124 (vip-ring-insert vip-related-files-and-buffers-ring (buffer-name))
1127 ;;; Movement utilities
1129 (defvar vip-syntax-preference 'strict-vi
1130 "*Syntax type characterizing Viper's alphanumeric symbols.
1131 `emacs' means only word constituents are considered to be alphanumeric.
1132 Word constituents are symbols specified as word constituents by the current
1134 `extended' means word and symbol constituents.
1135 `reformed-vi' means Vi-ish behavior: word constituents and the symbol `_'.
1136 However, word constituents are determined according to Emacs syntax tables,
1137 which may be different from Vi in some major modes.
1138 `strict-vi' means Viper words are exactly as in Vi.")
1140 (vip-deflocalvar vip-ALPHA-char-class "w"
1141 "String of syntax classes characterizing Viper's alphanumeric symbols.
1142 In addition, the symbol `_' may be considered alphanumeric if
1143 `vip-syntax-preference'is `reformed-vi'.")
1145 (vip-deflocalvar vip-strict-ALPHA-chars "a-zA-Z0-9_"
1146 "Regexp matching the set of alphanumeric characters acceptable to strict
1148 (vip-deflocalvar vip-strict-SEP-chars " \t\n"
1149 "Regexp matching the set of alphanumeric characters acceptable to strict
1152 (vip-deflocalvar vip-SEP-char-class " -"
1153 "String of syntax classes for Vi separators.
1154 Usually contains ` ', linefeed, TAB or formfeed.")
1156 (defun vip-update-alphanumeric-class ()
1157 "Set the syntax class of Viper alphanumerals according to `vip-syntax-preference'.
1158 Must be called in order for changes to `vip-syntax-preference' to take effect."
1161 vip-ALPHA-char-class
1162 (cond ((eq vip-syntax-preference 'emacs) "w") ; only word constituents
1163 ((eq vip-syntax-preference 'extended) "w_") ; word & symbol chars
1164 (t "w")))) ; vi syntax: word constituents and the symbol `_'
1166 ;; addl-chars are characters to be temporarily considered as alphanumerical
1167 (defun vip-looking-at-alpha (&optional addl-chars)
1168 (or (stringp addl-chars) (setq addl-chars ""))
1169 (if (eq vip-syntax-preference 'reformed-vi)
1170 (setq addl-chars (concat addl-chars "_")))
1171 (let ((char (char-after (point))))
1173 (if (eq vip-syntax-preference 'strict-vi)
1174 (looking-at (concat "[" vip-strict-ALPHA-chars addl-chars "]"))
1176 ;; convert string to list
1177 (append (vconcat addl-chars) nil))
1178 (memq (char-syntax char)
1179 (append (vconcat vip-ALPHA-char-class) nil)))))
1182 (defsubst vip-looking-at-separator ()
1183 (let ((char (char-after (point))))
1185 (or (eq char ?\n) ; RET is always a separator in Vi
1186 (memq (char-syntax char)
1187 (append (vconcat vip-SEP-char-class) nil))))))
1189 (defsubst vip-looking-at-alphasep (&optional addl-chars)
1190 (or (vip-looking-at-separator) (vip-looking-at-alpha addl-chars)))
1192 (defsubst vip-skip-alpha-forward (&optional addl-chars)
1193 (or (stringp addl-chars) (setq addl-chars ""))
1196 (cond ((eq vip-syntax-preference 'strict-vi)
1198 (t vip-ALPHA-char-class ))
1199 (cond ((eq vip-syntax-preference 'strict-vi)
1200 (concat vip-strict-ALPHA-chars addl-chars))
1203 (defsubst vip-skip-alpha-backward (&optional addl-chars)
1204 (or (stringp addl-chars) (setq addl-chars ""))
1207 (cond ((eq vip-syntax-preference 'strict-vi)
1209 (t vip-ALPHA-char-class ))
1210 (cond ((eq vip-syntax-preference 'strict-vi)
1211 (concat vip-strict-ALPHA-chars addl-chars))
1214 ;; weird syntax tables may confuse strict-vi style
1215 (defsubst vip-skip-all-separators-forward (&optional within-line)
1216 (vip-skip-syntax 'forward
1218 (or within-line "\n")
1219 (if within-line (vip-line-pos 'end))))
1220 (defsubst vip-skip-all-separators-backward (&optional within-line)
1221 (vip-skip-syntax 'backward
1223 (or within-line "\n")
1224 (if within-line (vip-line-pos 'start))))
1225 (defun vip-skip-nonseparators (direction)
1226 (let ((func (intern (format "skip-syntax-%S" direction))))
1227 (funcall func (concat "^" vip-SEP-char-class)
1228 (vip-line-pos (if (eq direction 'forward) 'end 'start)))))
1230 (defsubst vip-skip-nonalphasep-forward ()
1231 (if (eq vip-syntax-preference 'strict-vi)
1233 (concat "^" vip-strict-SEP-chars vip-strict-ALPHA-chars))
1234 (skip-syntax-forward
1236 "^" vip-ALPHA-char-class vip-SEP-char-class) (vip-line-pos 'end))))
1237 (defsubst vip-skip-nonalphasep-backward ()
1238 (if (eq vip-syntax-preference 'strict-vi)
1239 (skip-chars-backward
1240 (concat "^" vip-strict-SEP-chars vip-strict-ALPHA-chars))
1241 (skip-syntax-backward
1243 "^" vip-ALPHA-char-class vip-SEP-char-class) (vip-line-pos 'start))))
1245 ;; Skip SYNTAX like skip-syntax-* and ADDL-CHARS like skip-chars-*
1246 ;; Return the number of chars traveled.
1247 ;; Either SYNTAX or ADDL-CHARS can be nil, in which case they are interpreted
1248 ;; as an empty string.
1249 (defun vip-skip-syntax (direction syntax addl-chars &optional limit)
1252 (skip-chars-func (intern (format "skip-chars-%S" direction)))
1253 (skip-syntax-func (intern (format "skip-syntax-%S" direction))))
1254 (or (stringp addl-chars) (setq addl-chars ""))
1255 (or (stringp syntax) (setq syntax ""))
1256 (while (and (not (= local 0)) (not (eobp)))
1258 (+ (funcall skip-syntax-func syntax limit)
1259 (funcall skip-chars-func addl-chars limit)))
1260 (setq total (+ total local)))
1267 (provide 'viper-util)
1269 ;;; viper-util.el ends here