Commit | Line | Data |
---|---|---|
6c2e12f4 | 1 | ;;; viper-util.el --- Utilities used by viper.el |
75551c46 | 2 | ;; Copyright (C) 1994, 1995 Free Software Foundation, Inc. |
d6fd318f | 3 | |
6c2e12f4 KH |
4 | ;; This file is part of GNU Emacs. |
5 | ||
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) | |
9 | ;; any later version. | |
10 | ||
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. | |
15 | ||
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 | |
18 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | ||
20 | (require 'ring) | |
21 | ||
75551c46 | 22 | ;; Whether it is XEmacs or not |
c8085774 | 23 | (defconst vip-xemacs-p (string-match "\\(Lucid\\|XEmacs\\)" emacs-version)) |
75551c46 KH |
24 | ;; Whether it is Emacs or not |
25 | (defconst vip-emacs-p (not vip-xemacs-p)) | |
26 | ;; Tell whether we are running as a window application or on a TTY | |
27 | (defsubst vip-device-type () | |
28 | (if vip-emacs-p | |
29 | window-system | |
30 | (device-type (selected-device)))) | |
31 | ;; in XEmacs: device-type is tty on tty and stream in batch. | |
32 | (defsubst vip-window-display-p () | |
33 | (and (vip-device-type) (not (memq (vip-device-type) '(tty stream))))) | |
6c2e12f4 KH |
34 | |
35 | \f | |
36 | ;;; Macros | |
37 | ||
38 | (defmacro vip-deflocalvar (var default-value &optional documentation) | |
39 | (` (progn | |
40 | (defvar (, var) (, default-value) | |
41 | (, (format "%s\n\(buffer local\)" documentation))) | |
42 | (make-variable-buffer-local '(, var)) | |
43 | ))) | |
44 | ||
45 | (defmacro vip-loop (count body) | |
46 | "(vip-loop COUNT BODY) Execute BODY COUNT times." | |
47 | (list 'let (list (list 'count count)) | |
48 | (list 'while '(> count 0) | |
49 | body | |
50 | '(setq count (1- count)) | |
51 | ))) | |
52 | ||
53 | (defmacro vip-buffer-live-p (buf) | |
54 | (` (and (, buf) (get-buffer (, buf)) (buffer-name (get-buffer (, buf)))))) | |
55 | ||
56 | ;; return buffer-specific macro definition, given a full macro definition | |
57 | (defmacro vip-kbd-buf-alist (macro-elt) | |
58 | (` (nth 1 (, macro-elt)))) | |
59 | ;; get a pair: (curr-buffer . macro-definition) | |
60 | (defmacro vip-kbd-buf-pair (macro-elt) | |
61 | (` (assoc (buffer-name) (vip-kbd-buf-alist (, macro-elt))))) | |
62 | ;; get macro definition for current buffer | |
63 | (defmacro vip-kbd-buf-definition (macro-elt) | |
64 | (` (cdr (vip-kbd-buf-pair (, macro-elt))))) | |
65 | ||
66 | ;; return mode-specific macro definitions, given a full macro definition | |
67 | (defmacro vip-kbd-mode-alist (macro-elt) | |
68 | (` (nth 2 (, macro-elt)))) | |
69 | ;; get a pair: (major-mode . macro-definition) | |
70 | (defmacro vip-kbd-mode-pair (macro-elt) | |
71 | (` (assoc major-mode (vip-kbd-mode-alist (, macro-elt))))) | |
72 | ;; get macro definition for the current major mode | |
73 | (defmacro vip-kbd-mode-definition (macro-elt) | |
74 | (` (cdr (vip-kbd-mode-pair (, macro-elt))))) | |
75 | ||
76 | ;; return global macro definition, given a full macro definition | |
77 | (defmacro vip-kbd-global-pair (macro-elt) | |
78 | (` (nth 3 (, macro-elt)))) | |
79 | ;; get global macro definition from an elt of macro-alist | |
80 | (defmacro vip-kbd-global-definition (macro-elt) | |
81 | (` (cdr (vip-kbd-global-pair (, macro-elt))))) | |
82 | ||
83 | ;; last elt of a sequence | |
84 | (defsubst vip-seq-last-elt (seq) | |
85 | (elt seq (1- (length seq)))) | |
86 | ||
87 | ;; Check if arg is a valid character for register | |
88 | ;; TYPE is a list that can contain `letter', `Letter', and `digit'. | |
89 | ;; Letter means lowercase letters, Letter means uppercase letters, and | |
90 | ;; digit means digits from 1 to 9. | |
91 | ;; If TYPE is nil, then down/uppercase letters and digits are allowed. | |
92 | (defun vip-valid-register (reg &optional type) | |
93 | (or type (setq type '(letter Letter digit))) | |
94 | (or (if (memq 'letter type) | |
95 | (and (<= ?a reg) (<= reg ?z))) | |
96 | (if (memq 'digit type) | |
97 | (and (<= ?1 reg) (<= reg ?9))) | |
98 | (if (memq 'Letter type) | |
99 | (and (<= ?A reg) (<= reg ?Z))) | |
100 | )) | |
101 | ||
75551c46 | 102 | ;; checks if object is a marker, has a buffer, and points to within that buffer |
6c2e12f4 | 103 | (defun vip-valid-marker (marker) |
75551c46 | 104 | (if (and (markerp marker) (marker-buffer marker)) |
6c2e12f4 KH |
105 | (let ((buf (marker-buffer marker)) |
106 | (pos (marker-position marker))) | |
107 | (save-excursion | |
108 | (set-buffer buf) | |
109 | (and (<= pos (point-max)) (<= (point-min) pos)))))) | |
110 | ||
111 | \f | |
112 | (defvar vip-minibuffer-overlay-priority 300) | |
113 | (defvar vip-replace-overlay-priority 400) | |
114 | (defvar vip-search-overlay-priority 500) | |
115 | ||
116 | \f | |
117 | ;;; XEmacs support | |
118 | ||
119 | (if vip-xemacs-p | |
120 | (progn | |
121 | (fset 'vip-read-event (symbol-function 'next-command-event)) | |
122 | (fset 'vip-make-overlay (symbol-function 'make-extent)) | |
123 | (fset 'vip-overlay-start (symbol-function 'extent-start-position)) | |
124 | (fset 'vip-overlay-end (symbol-function 'extent-end-position)) | |
125 | (fset 'vip-overlay-put (symbol-function 'set-extent-property)) | |
126 | (fset 'vip-overlay-p (symbol-function 'extentp)) | |
127 | (fset 'vip-overlay-get (symbol-function 'extent-property)) | |
128 | (fset 'vip-move-overlay (symbol-function 'set-extent-endpoints)) | |
75551c46 KH |
129 | (if (vip-window-display-p) |
130 | (fset 'vip-iconify (symbol-function 'iconify-frame))) | |
131 | (cond ((vip-window-display-p) | |
6c2e12f4 KH |
132 | (fset 'vip-get-face (symbol-function 'get-face)) |
133 | (fset 'vip-color-defined-p | |
75551c46 KH |
134 | (symbol-function 'valid-color-name-p)) |
135 | ))) | |
6c2e12f4 KH |
136 | (fset 'vip-read-event (symbol-function 'read-event)) |
137 | (fset 'vip-make-overlay (symbol-function 'make-overlay)) | |
138 | (fset 'vip-overlay-start (symbol-function 'overlay-start)) | |
139 | (fset 'vip-overlay-end (symbol-function 'overlay-end)) | |
140 | (fset 'vip-overlay-put (symbol-function 'overlay-put)) | |
141 | (fset 'vip-overlay-p (symbol-function 'overlayp)) | |
142 | (fset 'vip-overlay-get (symbol-function 'overlay-get)) | |
143 | (fset 'vip-move-overlay (symbol-function 'move-overlay)) | |
75551c46 | 144 | (if (vip-window-display-p) |
6c2e12f4 | 145 | (fset 'vip-iconify (symbol-function 'iconify-or-deiconify-frame))) |
75551c46 | 146 | (cond ((vip-window-display-p) |
6c2e12f4 KH |
147 | (fset 'vip-get-face (symbol-function 'internal-get-face)) |
148 | (fset 'vip-color-defined-p (symbol-function 'x-color-defined-p)) | |
75551c46 KH |
149 | ))) |
150 | ||
151 | (defsubst vip-color-display-p () | |
152 | (if vip-emacs-p | |
153 | (x-display-color-p) | |
154 | (eq (device-class (selected-device)) 'color))) | |
6c2e12f4 KH |
155 | |
156 | ;; OS/2 | |
75551c46 | 157 | (cond ((eq (vip-device-type) 'pm) |
6c2e12f4 KH |
158 | (fset 'vip-color-defined-p |
159 | (function (lambda (color) (assoc color pm-color-alist)))))) | |
160 | ||
161 | ;; needed to smooth out the difference between Emacs and XEmacs | |
162 | (defsubst vip-italicize-face (face) | |
163 | (if vip-xemacs-p | |
164 | (make-face-italic face) | |
165 | (make-face-italic face nil 'noerror))) | |
166 | ||
167 | ;; test if display is color and the colors are defined | |
168 | (defsubst vip-can-use-colors (&rest colors) | |
75551c46 | 169 | (if (vip-color-display-p) |
6c2e12f4 KH |
170 | (not (memq nil (mapcar 'vip-color-defined-p colors))) |
171 | )) | |
172 | ||
173 | ;; currently doesn't work for XEmacs | |
174 | (defun vip-change-cursor-color (new-color) | |
75551c46 KH |
175 | (if (and (vip-window-display-p) (vip-color-display-p) |
176 | (stringp new-color) (vip-color-defined-p new-color) | |
177 | (not (string= new-color (vip-get-cursor-color)))) | |
178 | (modify-frame-parameters | |
179 | (selected-frame) (list (cons 'cursor-color new-color))))) | |
6c2e12f4 KH |
180 | |
181 | (defsubst vip-save-cursor-color () | |
75551c46 KH |
182 | (if (and (vip-window-display-p) (vip-color-display-p)) |
183 | (let ((color (vip-get-cursor-color))) | |
6c2e12f4 KH |
184 | (if (and (stringp color) (vip-color-defined-p color) |
185 | (not (string= color vip-replace-overlay-cursor-color))) | |
186 | (vip-overlay-put vip-replace-overlay 'vip-cursor-color color))))) | |
187 | ||
188 | (defsubst vip-restore-cursor-color () | |
189 | (vip-change-cursor-color | |
190 | (vip-overlay-get vip-replace-overlay 'vip-cursor-color))) | |
75551c46 KH |
191 | |
192 | (defsubst vip-get-cursor-color () | |
193 | (cdr (assoc 'cursor-color (frame-parameters)))) | |
6c2e12f4 KH |
194 | |
195 | \f | |
196 | ;; Check the current version against the major and minor version numbers | |
197 | ;; using op: cur-vers op major.minor If emacs-major-version or | |
198 | ;; emacs-minor-version are not defined, we assume that the current version | |
199 | ;; is hopelessly outdated. We assume that emacs-major-version and | |
200 | ;; emacs-minor-version are defined. Otherwise, for Emacs/XEmacs 19, if the | |
201 | ;; current minor version is < 10 (xemacs) or < 23 (emacs) the return value | |
202 | ;; will be nil (when op is =, >, or >=) and t (when op is <, <=), which may be | |
203 | ;; incorrect. However, this gives correct result in our cases, since we are | |
204 | ;; testing for sufficiently high Emacs versions. | |
205 | (defun vip-check-version (op major minor &optional type-of-emacs) | |
206 | (if (and (boundp 'emacs-major-version) (boundp 'emacs-minor-version)) | |
207 | (and (cond ((eq type-of-emacs 'xemacs) vip-xemacs-p) | |
208 | ((eq type-of-emacs 'emacs) vip-emacs-p) | |
209 | (t t)) | |
210 | (cond ((eq op '=) (and (= emacs-minor-version minor) | |
211 | (= emacs-major-version major))) | |
212 | ((memq op '(> >= < <=)) | |
213 | (and (or (funcall op emacs-major-version major) | |
214 | (= emacs-major-version major)) | |
215 | (if (= emacs-major-version major) | |
216 | (funcall op emacs-minor-version minor) | |
217 | t))) | |
218 | (t | |
219 | (error "%S: Invalid op in vip-check-version" op)))) | |
220 | (cond ((memq op '(= > >=)) nil) | |
221 | ((memq op '(< <=)) t)))) | |
4702a420 MK |
222 | |
223 | ;;;; warn if it is a wrong version of emacs | |
224 | ;;(if (or (vip-check-version '< 19 29 'emacs) | |
225 | ;; (vip-check-version '< 19 12 'xemacs)) | |
226 | ;; (progn | |
227 | ;; (with-output-to-temp-buffer " *vip-info*" | |
228 | ;; (switch-to-buffer " *vip-info*") | |
229 | ;; (insert | |
230 | ;; (format " | |
231 | ;; | |
232 | ;;This version of Viper requires | |
233 | ;; | |
234 | ;;\t Emacs 19.29 and higher | |
235 | ;;\t OR | |
236 | ;;\t XEmacs 19.12 and higher | |
237 | ;; | |
238 | ;;It is unlikely to work under Emacs version %s | |
239 | ;;that you are using... " emacs-version)) | |
240 | ;; | |
241 | ;; (if noninteractive | |
242 | ;; () | |
243 | ;; (beep 1) | |
244 | ;; (beep 1) | |
245 | ;; (insert "\n\nType any key to continue... ") | |
246 | ;; (vip-read-event))) | |
247 | ;; (kill-buffer " *vip-info*"))) | |
75551c46 | 248 | |
6c2e12f4 KH |
249 | |
250 | (defun vip-get-visible-buffer-window (wind) | |
251 | (if vip-xemacs-p | |
252 | (get-buffer-window wind t) | |
253 | (get-buffer-window wind 'visible))) | |
254 | ||
255 | ||
75551c46 KH |
256 | ;; Return line position. |
257 | ;; If pos is 'start then returns position of line start. | |
258 | ;; If pos is 'end, returns line end. If pos is 'mid, returns line center. | |
259 | ;; Pos = 'indent returns beginning of indentation. | |
260 | ;; Otherwise, returns point. Current point is not moved in any case." | |
6c2e12f4 | 261 | (defun vip-line-pos (pos) |
6c2e12f4 KH |
262 | (let ((cur-pos (point)) |
263 | (result)) | |
264 | (cond | |
265 | ((equal pos 'start) | |
266 | (beginning-of-line)) | |
267 | ((equal pos 'end) | |
268 | (end-of-line)) | |
269 | ((equal pos 'mid) | |
270 | (goto-char (+ (vip-line-pos 'start) (vip-line-pos 'end) 2))) | |
271 | ((equal pos 'indent) | |
272 | (back-to-indentation)) | |
273 | (t nil)) | |
274 | (setq result (point)) | |
275 | (goto-char cur-pos) | |
276 | result)) | |
277 | ||
278 | ||
75551c46 KH |
279 | ;; Like move-marker but creates a virgin marker if arg isn't already a marker. |
280 | ;; The first argument must eval to a variable name. | |
281 | ;; Arguments: (var-name position &optional buffer). | |
282 | ;; | |
283 | ;; This is useful for moving markers that are supposed to be local. | |
284 | ;; For this, VAR-NAME should be made buffer-local with nil as a default. | |
285 | ;; Then, each time this var is used in `vip-move-marker-locally' in a new | |
286 | ;; buffer, a new marker will be created. | |
6c2e12f4 | 287 | (defun vip-move-marker-locally (var pos &optional buffer) |
6c2e12f4 KH |
288 | (if (markerp (eval var)) |
289 | () | |
290 | (set var (make-marker))) | |
291 | (move-marker (eval var) pos buffer)) | |
292 | ||
293 | ||
75551c46 | 294 | ;; Print CONDITIONS as a message. |
6c2e12f4 | 295 | (defun vip-message-conditions (conditions) |
6c2e12f4 KH |
296 | (let ((case (car conditions)) (msg (cdr conditions))) |
297 | (if (null msg) | |
298 | (message "%s" case) | |
299 | (message "%s: %s" case (mapconcat 'prin1-to-string msg " "))) | |
300 | (beep 1))) | |
301 | ||
75551c46 | 302 | |
6c2e12f4 KH |
303 | \f |
304 | ;;; List/alist utilities | |
305 | ||
75551c46 | 306 | ;; Convert LIST to an alist |
6c2e12f4 | 307 | (defun vip-list-to-alist (lst) |
6c2e12f4 KH |
308 | (let ((alist)) |
309 | (while lst | |
310 | (setq alist (cons (list (car lst)) alist)) | |
311 | (setq lst (cdr lst))) | |
312 | alist)) | |
313 | ||
75551c46 | 314 | ;; Convert ALIST to a list. |
6c2e12f4 | 315 | (defun vip-alist-to-list (alst) |
6c2e12f4 KH |
316 | (let ((lst)) |
317 | (while alst | |
318 | (setq lst (cons (car (car alst)) lst)) | |
319 | (setq alst (cdr alst))) | |
320 | lst)) | |
321 | ||
75551c46 | 322 | ;; Filter ALIST using REGEXP. Return alist whose elements match the regexp. |
6c2e12f4 | 323 | (defun vip-filter-alist (regexp alst) |
6c2e12f4 KH |
324 | (interactive "s x") |
325 | (let ((outalst) (inalst alst)) | |
326 | (while (car inalst) | |
327 | (if (string-match regexp (car (car inalst))) | |
328 | (setq outalst (cons (car inalst) outalst))) | |
329 | (setq inalst (cdr inalst))) | |
330 | outalst)) | |
331 | ||
75551c46 | 332 | ;; Filter LIST using REGEXP. Return list whose elements match the regexp. |
6c2e12f4 | 333 | (defun vip-filter-list (regexp lst) |
6c2e12f4 KH |
334 | (interactive "s x") |
335 | (let ((outlst) (inlst lst)) | |
336 | (while (car inlst) | |
337 | (if (string-match regexp (car inlst)) | |
338 | (setq outlst (cons (car inlst) outlst))) | |
339 | (setq inlst (cdr inlst))) | |
340 | outlst)) | |
341 | ||
342 | ||
343 | ;; Append LIS2 to LIS1, both alists, by side-effect and returns LIS1 | |
344 | ;; LIS2 is modified by filtering it: deleting its members of the form | |
345 | ;; \(car elt\) such that (car elt') is in LIS1. | |
346 | (defun vip-append-filter-alist (lis1 lis2) | |
347 | (let ((temp lis1) | |
348 | elt) | |
349 | ||
350 | ;;filter-append the second list | |
351 | (while temp | |
352 | ;; delete all occurrences | |
353 | (while (setq elt (assoc (car (car temp)) lis2)) | |
354 | (setq lis2 (delq elt lis2))) | |
355 | (setq temp (cdr temp))) | |
356 | ||
357 | (nconc lis1 lis2))) | |
358 | ||
359 | ||
360 | ||
361 | \f | |
362 | ;;; Insertion ring | |
363 | ||
364 | ;; Rotate RING's index. DIRection can be positive or negative. | |
365 | (defun vip-ring-rotate1 (ring dir) | |
366 | (if (and (ring-p ring) (> (ring-length ring) 0)) | |
367 | (progn | |
368 | (setcar ring (cond ((> dir 0) | |
369 | (ring-plus1 (car ring) (ring-length ring))) | |
370 | ((< dir 0) | |
371 | (ring-minus1 (car ring) (ring-length ring))) | |
372 | ;; don't rotate if dir = 0 | |
373 | (t (car ring)))) | |
374 | (vip-current-ring-item ring) | |
375 | ))) | |
376 | ||
377 | (defun vip-special-ring-rotate1 (ring dir) | |
378 | (if (memq vip-intermediate-command | |
379 | '(repeating-display-destructive-command | |
380 | repeating-insertion-from-ring)) | |
381 | (vip-ring-rotate1 ring dir) | |
382 | ;; don't rotate otherwise | |
383 | (vip-ring-rotate1 ring 0))) | |
384 | ||
385 | ;; current ring item; if N is given, then so many items back from the | |
386 | ;; current | |
387 | (defun vip-current-ring-item (ring &optional n) | |
388 | (setq n (or n 0)) | |
389 | (if (and (ring-p ring) (> (ring-length ring) 0)) | |
390 | (aref (cdr (cdr ring)) (mod (- (car ring) 1 n) (ring-length ring))))) | |
391 | ||
392 | ;; push item onto ring. the second argument is a ring-variable, not value. | |
393 | (defun vip-push-onto-ring (item ring-var) | |
394 | (or (ring-p (eval ring-var)) | |
395 | (set ring-var (make-ring (eval (intern (format "%S-size" ring-var)))))) | |
396 | (or (null item) ; don't push nil | |
397 | (and (stringp item) (string= item "")) ; or empty strings | |
398 | (equal item (vip-current-ring-item (eval ring-var))) ; or old stuff | |
399 | ;; Since vip-set-destructive-command checks if we are inside vip-repeat, | |
400 | ;; we don't check whether this-command-keys is a `.'. | |
401 | ;; The cmd vip-repeat makes a call to the current function only if | |
402 | ;; `.' is executing a command from the command history. It doesn't | |
403 | ;; call the push-onto-ring function if `.' is simply repeating the | |
404 | ;; last destructive command. | |
405 | ;; We only check for ESC (which happens when we do insert with a | |
406 | ;; prefix argument, or if this-command-keys doesn't give anything | |
407 | ;; meaningful (in that case we don't know what to show to the user). | |
408 | (and (eq ring-var 'vip-command-ring) | |
409 | (string-match "\\([0-9]*\e\\|^[ \t]*$\\|escape\\)" | |
410 | (vip-array-to-string (this-command-keys)))) | |
411 | (vip-ring-insert (eval ring-var) item)) | |
412 | ) | |
413 | ||
414 | ||
415 | ;; removing elts from ring seems to break it | |
416 | (defun vip-cleanup-ring (ring) | |
417 | (or (< (ring-length ring) 2) | |
418 | (null (vip-current-ring-item ring)) | |
419 | ;; last and previous equal | |
420 | (if (equal (vip-current-ring-item ring) (vip-current-ring-item ring 1)) | |
421 | (vip-ring-pop ring)))) | |
422 | ||
423 | ;; ring-remove seems to be buggy, so we concocted this for our purposes. | |
424 | (defun vip-ring-pop (ring) | |
425 | (let* ((ln (ring-length ring)) | |
426 | (vec (cdr (cdr ring))) | |
427 | (veclen (length vec)) | |
428 | (hd (car ring)) | |
429 | (idx (max 0 (ring-minus1 hd ln))) | |
430 | (top-elt (aref vec idx))) | |
431 | ||
432 | ;; shift elements | |
433 | (while (< (1+ idx) veclen) | |
434 | (aset vec idx (aref vec (1+ idx))) | |
435 | (setq idx (1+ idx))) | |
436 | (aset vec idx nil) | |
437 | ||
438 | (setq hd (max 0 (ring-minus1 hd ln))) | |
439 | (if (= hd (1- ln)) (setq hd 0)) | |
440 | (setcar ring hd) ; move head | |
441 | (setcar (cdr ring) (max 0 (1- ln))) ; adjust length | |
442 | top-elt | |
443 | )) | |
444 | ||
445 | (defun vip-ring-insert (ring item) | |
446 | (let* ((ln (ring-length ring)) | |
447 | (vec (cdr (cdr ring))) | |
448 | (veclen (length vec)) | |
449 | (hd (car ring)) | |
450 | (vecpos-after-hd (if (= hd 0) ln hd)) | |
451 | (idx ln)) | |
452 | ||
453 | (if (= ln veclen) | |
454 | (progn | |
455 | (aset vec hd item) ; hd is always 1+ the actual head index in vec | |
456 | (setcar ring (ring-plus1 hd ln))) | |
457 | (setcar (cdr ring) (1+ ln)) | |
458 | (setcar ring (ring-plus1 vecpos-after-hd (1+ ln))) | |
459 | (while (and (>= idx vecpos-after-hd) (> ln 0)) | |
460 | (aset vec idx (aref vec (1- idx))) | |
461 | (setq idx (1- idx))) | |
462 | (aset vec vecpos-after-hd item)) | |
463 | item)) | |
464 | ||
465 | \f | |
466 | ;;; String utilities | |
467 | ||
468 | ;; If STRING is longer than MAX-LEN, truncate it and print ...... instead | |
469 | ;; PRE-STRING is a string to prepend to the abbrev string. | |
470 | ;; POST-STRING is a string to append to the abbrev string. | |
471 | ;; ABBREV_SIGN is a string to be inserted before POST-STRING | |
472 | ;; if the orig string was truncated. | |
473 | (defun vip-abbreviate-string (string max-len | |
474 | pre-string post-string abbrev-sign) | |
475 | (let (truncated-str) | |
476 | (setq truncated-str | |
477 | (if (stringp string) | |
478 | (substring string 0 (min max-len (length string))))) | |
479 | (cond ((null truncated-str) "") | |
480 | ((> (length string) max-len) | |
481 | (format "%s%s%s%s" | |
482 | pre-string truncated-str abbrev-sign post-string)) | |
483 | (t (format "%s%s%s" pre-string truncated-str post-string))))) | |
c8085774 KH |
484 | |
485 | ;; tells if we are over a whitespace-only line | |
486 | (defsubst vip-over-whitespace-line () | |
487 | (save-excursion | |
488 | (beginning-of-line) | |
489 | (looking-at "^[ \t]*$"))) | |
6c2e12f4 KH |
490 | |
491 | \f | |
492 | ;;; Saving settings in custom file | |
493 | ||
75551c46 KH |
494 | ;; Save the current setting of VAR in CUSTOM-FILE. |
495 | ;; If given, MESSAGE is a message to be displayed after that. | |
496 | ;; This message is erased after 2 secs, if erase-msg is non-nil. | |
497 | ;; Arguments: var message custom-file &optional erase-message | |
6c2e12f4 | 498 | (defun vip-save-setting (var message custom-file &optional erase-msg) |
6c2e12f4 KH |
499 | (let* ((var-name (symbol-name var)) |
500 | (var-val (if (boundp var) (eval var))) | |
501 | (regexp (format "^[^;]*%s[ \t\n]*[a-zA-Z---_']*[ \t\n)]" var-name)) | |
502 | (buf (find-file-noselect (substitute-in-file-name custom-file))) | |
503 | ) | |
504 | (message message) | |
505 | (save-excursion | |
506 | (set-buffer buf) | |
507 | (goto-char (point-min)) | |
508 | (if (re-search-forward regexp nil t) | |
509 | (let ((reg-end (1- (match-end 0)))) | |
510 | (search-backward var-name) | |
511 | (delete-region (match-beginning 0) reg-end) | |
512 | (goto-char (match-beginning 0)) | |
513 | (insert (format "%s '%S" var-name var-val))) | |
514 | (goto-char (point-max)) | |
515 | (if (not (bolp)) (insert "\n")) | |
516 | (insert (format "(setq %s '%S)\n" var-name var-val))) | |
517 | (save-buffer)) | |
518 | (kill-buffer buf) | |
519 | (if erase-msg | |
520 | (progn | |
521 | (sit-for 2) | |
522 | (message ""))) | |
523 | )) | |
524 | ||
525 | ;; Save STRING in CUSTOM-FILE. If PATTERN is non-nil, remove strings that | |
526 | ;; match this pattern. | |
527 | (defun vip-save-string-in-file (string custom-file &optional pattern) | |
528 | (let ((buf (find-file-noselect (substitute-in-file-name custom-file)))) | |
529 | (save-excursion | |
530 | (set-buffer buf) | |
531 | (goto-char (point-min)) | |
532 | (if pattern (delete-matching-lines pattern)) | |
533 | (goto-char (point-max)) | |
534 | (if string (insert string)) | |
535 | (save-buffer)) | |
536 | (kill-buffer buf) | |
537 | )) | |
538 | ||
539 | \f | |
540 | ;;; Overlays | |
541 | ||
542 | ;; Search | |
543 | ||
544 | (defun vip-flash-search-pattern () | |
545 | (if (vip-overlay-p vip-search-overlay) | |
546 | (vip-move-overlay vip-search-overlay (match-beginning 0) (match-end 0)) | |
547 | (setq vip-search-overlay | |
548 | (vip-make-overlay | |
549 | (match-beginning 0) (match-end 0) (current-buffer)))) | |
550 | ||
551 | (vip-overlay-put vip-search-overlay 'priority vip-search-overlay-priority) | |
75551c46 | 552 | (if (vip-window-display-p) |
6c2e12f4 KH |
553 | (progn |
554 | (vip-overlay-put vip-search-overlay 'face vip-search-face) | |
555 | (sit-for 2) | |
556 | (vip-overlay-put vip-search-overlay 'face nil)))) | |
557 | ||
558 | ;; Replace state | |
559 | ||
560 | (defun vip-set-replace-overlay (beg end) | |
561 | (if (vip-overlay-p vip-replace-overlay) | |
562 | (vip-move-replace-overlay beg end) | |
563 | (setq vip-replace-overlay (vip-make-overlay beg end (current-buffer))) | |
564 | (vip-overlay-put vip-replace-overlay | |
565 | 'vip-start | |
566 | (move-marker (make-marker) | |
567 | (vip-overlay-start vip-replace-overlay))) | |
568 | (vip-overlay-put vip-replace-overlay | |
569 | 'vip-end | |
570 | (move-marker (make-marker) | |
571 | (vip-overlay-end vip-replace-overlay))) | |
572 | (vip-overlay-put | |
573 | vip-replace-overlay 'priority vip-replace-overlay-priority)) | |
75551c46 | 574 | (if (vip-window-display-p) |
6c2e12f4 KH |
575 | (vip-overlay-put vip-replace-overlay 'face vip-replace-overlay-face)) |
576 | (vip-save-cursor-color) | |
577 | (vip-change-cursor-color vip-replace-overlay-cursor-color) | |
578 | ) | |
579 | ||
dd7c19d4 | 580 | |
6c2e12f4 KH |
581 | |
582 | (defsubst vip-hide-replace-overlay () | |
75551c46 | 583 | (vip-set-replace-overlay-glyphs nil nil) |
6c2e12f4 | 584 | (vip-restore-cursor-color) |
75551c46 | 585 | (if (vip-window-display-p) |
6c2e12f4 | 586 | (vip-overlay-put vip-replace-overlay 'face nil))) |
75551c46 KH |
587 | |
588 | (defsubst vip-set-replace-overlay-glyphs (before-glyph after-glyph) | |
589 | (if (or (not (vip-window-display-p)) | |
590 | vip-use-replace-region-delimiters) | |
591 | (let ((before-name (if vip-xemacs-p 'begin-glyph 'before-string)) | |
592 | (after-name (if vip-xemacs-p 'end-glyph 'after-string))) | |
593 | (vip-overlay-put vip-replace-overlay before-name before-glyph) | |
594 | (vip-overlay-put vip-replace-overlay after-name after-glyph)))) | |
6c2e12f4 KH |
595 | |
596 | ||
597 | (defsubst vip-replace-start () | |
598 | (vip-overlay-get vip-replace-overlay 'vip-start)) | |
599 | (defsubst vip-replace-end () | |
600 | (vip-overlay-get vip-replace-overlay 'vip-end)) | |
601 | ||
602 | (defsubst vip-move-replace-overlay (beg end) | |
603 | (vip-move-overlay vip-replace-overlay beg end) | |
604 | (move-marker (vip-replace-start) (vip-overlay-start vip-replace-overlay)) | |
605 | (move-marker (vip-replace-end) (vip-overlay-end vip-replace-overlay))) | |
606 | ||
607 | ||
608 | ;; Minibuffer | |
609 | ||
610 | (defun vip-set-minibuffer-overlay () | |
611 | (vip-check-minibuffer-overlay) | |
612 | ;; We always move the minibuffer overlay, since in XEmacs | |
613 | ;; this overlay may get detached. Moving will reattach it. | |
75551c46 KH |
614 | ;; This overlay is also moved via the vip-post-command-hook, |
615 | ;; to insure that it covers the whole minibuffer. | |
6c2e12f4 | 616 | (vip-move-minibuffer-overlay) |
75551c46 | 617 | (if (vip-window-display-p) |
6c2e12f4 KH |
618 | (progn |
619 | (vip-overlay-put | |
620 | vip-minibuffer-overlay 'face vip-minibuffer-current-face) | |
621 | (vip-overlay-put | |
622 | vip-minibuffer-overlay 'priority vip-minibuffer-overlay-priority)) | |
623 | )) | |
624 | ||
625 | (defun vip-check-minibuffer-overlay () | |
626 | (if (vip-overlay-p vip-minibuffer-overlay) | |
627 | () | |
628 | (setq vip-minibuffer-overlay | |
629 | (vip-make-overlay 1 (1+ (buffer-size)) (current-buffer))))) | |
630 | ||
631 | ;; arguments to this function are dummies. they are needed just because | |
632 | ;; it is used as a insert-in-front-hook to vip-minibuffer-overlay, and such | |
633 | ;; hooks require 3 arguments. | |
634 | (defun vip-move-minibuffer-overlay (&optional overl beg end) | |
635 | (if (vip-is-in-minibuffer) | |
636 | (progn | |
637 | (vip-check-minibuffer-overlay) | |
638 | (vip-move-overlay vip-minibuffer-overlay 1 (1+ (buffer-size)))))) | |
639 | ||
640 | (defsubst vip-is-in-minibuffer () | |
641 | (string-match "\*Minibuf-" (buffer-name))) | |
642 | ||
643 | ||
644 | \f | |
645 | ;;; XEmacs compatibility | |
646 | ||
dd7c19d4 | 647 | ;; Sit for VAL milliseconds. XEmacs doesn't support the millisecond arg |
75551c46 | 648 | ;; in sit-for, so this function smoothes out the differences. |
6c2e12f4 KH |
649 | (defsubst vip-sit-for-short (val &optional nodisp) |
650 | (if vip-xemacs-p | |
651 | (sit-for (/ val 1000.0) nodisp) | |
652 | (sit-for 0 val nodisp))) | |
653 | ||
654 | ;; EVENT may be a single event of a sequence of events | |
655 | (defsubst vip-ESC-event-p (event) | |
656 | (let ((ESC-keys '(?\e (control \[) escape)) | |
657 | (key (vip-event-key event))) | |
658 | (member key ESC-keys))) | |
659 | ||
660 | ;; like (set-mark-command nil) but doesn't push twice, if (car mark-ring) | |
661 | ;; is the same as (mark t). | |
662 | (defsubst vip-set-mark-if-necessary () | |
663 | (setq mark-ring (delete (vip-mark-marker) mark-ring)) | |
664 | (set-mark-command nil)) | |
665 | ||
666 | (defsubst vip-mark-marker () | |
667 | (if vip-xemacs-p | |
668 | (mark-marker t) | |
669 | (mark-marker))) | |
670 | ||
671 | ;; In transient mark mode (zmacs mode), it is annoying when regions become | |
672 | ;; highlighted due to Viper's pushing marks. So, we deactivate marks, unless | |
673 | ;; the user explicitly wants highlighting, e.g., by hitting '' or `` | |
674 | (defun vip-deactivate-mark () | |
675 | (if vip-xemacs-p | |
676 | (zmacs-deactivate-region) | |
677 | (deactivate-mark))) | |
678 | ||
dd7c19d4 MK |
679 | (defsubst vip-leave-region-active () |
680 | (if vip-xemacs-p | |
681 | (setq zmacs-region-stays t))) | |
682 | ||
6c2e12f4 KH |
683 | |
684 | (defsubst vip-events-to-keys (events) | |
685 | (cond (vip-xemacs-p (events-to-keys events)) | |
686 | (t events))) | |
687 | ||
688 | ||
689 | (defun vip-eval-after-load (file form) | |
690 | (if vip-emacs-p | |
691 | (eval-after-load file form) | |
692 | (or (assoc file after-load-alist) | |
693 | (setq after-load-alist (cons (list file) after-load-alist))) | |
694 | (let ((elt (assoc file after-load-alist))) | |
695 | (or (member form (cdr elt)) | |
696 | (setq elt (nconc elt (list form))))) | |
697 | form | |
698 | )) | |
4702a420 MK |
699 | |
700 | ;; This is here because Emacs changed the way local hooks work. | |
701 | ;; | |
702 | ;;Add to the value of HOOK the function FUNCTION. | |
703 | ;;FUNCTION is not added if already present. | |
704 | ;;FUNCTION is added (if necessary) at the beginning of the hook list | |
705 | ;;unless the optional argument APPEND is non-nil, in which case | |
706 | ;;FUNCTION is added at the end. | |
707 | ;; | |
708 | ;;HOOK should be a symbol, and FUNCTION may be any valid function. If | |
709 | ;;HOOK is void, it is first set to nil. If HOOK's value is a single | |
710 | ;;function, it is changed to a list of functions." | |
711 | (defun vip-add-hook (hook function &optional append) | |
712 | (if (not (boundp hook)) (set hook nil)) | |
713 | ;; If the hook value is a single function, turn it into a list. | |
714 | (let ((old (symbol-value hook))) | |
715 | (if (or (not (listp old)) (eq (car old) 'lambda)) | |
716 | (setq old (list old))) | |
717 | (if (member function old) | |
718 | nil | |
719 | (set hook (if append | |
720 | (append old (list function)) ; don't nconc | |
721 | (cons function old)))))) | |
722 | ||
723 | ;; This is here because of Emacs's changes in the semantics of add/remove-hooks | |
724 | ;; and due to the bugs they introduced. | |
725 | ;; | |
726 | ;; Remove from the value of HOOK the function FUNCTION. | |
727 | ;; HOOK should be a symbol, and FUNCTION may be any valid function. If | |
728 | ;; FUNCTION isn't the value of HOOK, or, if FUNCTION doesn't appear in the | |
729 | ;; list of hooks to run in HOOK, then nothing is done. See `vip-add-hook'." | |
730 | (defun vip-remove-hook (hook function) | |
731 | (if (or (not (boundp hook)) ;unbound symbol, or | |
732 | (null (symbol-value hook)) ;value is nil, or | |
733 | (null function)) ;function is nil, then | |
734 | nil ;Do nothing. | |
735 | (let ((hook-value (symbol-value hook))) | |
736 | (if (consp hook-value) | |
737 | ;; don't side-effect the list | |
738 | (setq hook-value (delete function (copy-sequence hook-value))) | |
739 | (if (equal hook-value function) | |
740 | (setq hook-value nil))) | |
741 | (set hook hook-value)))) | |
742 | ||
6c2e12f4 KH |
743 | |
744 | ||
745 | ;; like read-event, but in XEmacs also try to convert to char, if possible | |
746 | (defun vip-read-event-convert-to-char () | |
747 | (let (event) | |
748 | (if vip-emacs-p | |
749 | (read-event) | |
750 | (setq event (next-command-event)) | |
751 | (or (event-to-character event) | |
752 | event)) | |
753 | )) | |
754 | ||
4702a420 MK |
755 | ;; This function lets function-key-map convert key sequences into logical |
756 | ;; keys. This does a better job than vip-read-event when it comes to kbd | |
757 | ;; macros, since it enables certain macros to be shared between X and TTY | |
758 | ;; modes. | |
759 | (defun vip-read-key () | |
760 | (let ((overriding-local-map vip-overriding-map) | |
761 | key) | |
762 | (use-global-map vip-overriding-map) | |
763 | (setq key (elt (read-key-sequence nil) 0)) | |
764 | (use-global-map global-map) | |
765 | key)) | |
766 | ||
6c2e12f4 | 767 | |
75551c46 | 768 | ;; Emacs has a bug in eventp, which causes (eventp nil) to return (nil) |
a7acbbe4 | 769 | ;; instead of nil, if '(nil) was previously inadvertently assigned to |
6c2e12f4 KH |
770 | ;; unread-command-events |
771 | (defun vip-event-key (event) | |
772 | (or (and event (eventp event)) | |
773 | (error "vip-event-key: Wrong type argument, eventp, %S" event)) | |
774 | (let ((mod (event-modifiers event)) | |
775 | basis) | |
776 | (setq basis | |
777 | (cond | |
778 | (vip-xemacs-p | |
779 | (cond ((key-press-event-p event) | |
780 | (event-key event)) | |
781 | ((button-event-p event) | |
75551c46 | 782 | (concat "mouse-" (prin1-to-string (event-button event)))) |
6c2e12f4 KH |
783 | (t |
784 | (error "vip-event-key: Unknown event, %S" event)))) | |
785 | (t | |
786 | ;; Emacs doesn't handle capital letters correctly, since | |
787 | ;; \S-a isn't considered the same as A (it behaves as | |
788 | ;; plain `a' instead). So we take care of this here | |
75551c46 KH |
789 | (cond ((and (numberp event) (<= ?A event) (<= event ?Z)) |
790 | (setq mod nil | |
791 | event event)) | |
792 | ;; Emacs has the oddity whereby characters 128+char | |
793 | ;; represent M-char *if* this appears inside a string. | |
794 | ;; So, we convert them manually into (mata char). | |
795 | ((and (numberp event) (< ?\C-? event) (<= event 255)) | |
796 | (setq mod '(meta) | |
797 | event (- event ?\C-? 1))) | |
798 | (t (event-basic-type event))) | |
799 | ))) | |
6c2e12f4 KH |
800 | |
801 | (if (numberp basis) | |
802 | (setq basis | |
803 | (if (= basis ?\C-?) | |
804 | (list 'control '\?) ; taking care of an emacs bug | |
805 | (intern (char-to-string basis))))) | |
806 | ||
807 | (if mod | |
808 | (append mod (list basis)) | |
809 | basis) | |
810 | )) | |
811 | ||
812 | (defun vip-key-to-emacs-key (key) | |
813 | (let (key-name char-p modifiers mod-char-list base-key base-key-name) | |
814 | (cond (vip-xemacs-p key) | |
815 | ((symbolp key) | |
816 | (setq key-name (symbol-name key)) | |
817 | (if (= (length key-name) 1) ; character event | |
818 | (string-to-char key-name) | |
819 | key)) | |
820 | ((listp key) | |
821 | (setq modifiers (subseq key 0 (1- (length key))) | |
822 | base-key (vip-seq-last-elt key) | |
823 | base-key-name (symbol-name base-key) | |
824 | char-p (= (length base-key-name) 1)) | |
825 | (setq mod-char-list | |
826 | (mapcar | |
827 | '(lambda (elt) (upcase (substring (symbol-name elt) 0 1))) | |
828 | modifiers)) | |
829 | (if char-p | |
830 | (setq key-name | |
831 | (car (read-from-string | |
832 | (concat | |
833 | "?\\" | |
834 | (mapconcat 'identity mod-char-list "-\\") | |
835 | "-" | |
836 | base-key-name)))) | |
837 | (setq key-name | |
838 | (intern | |
839 | (concat | |
840 | (mapconcat 'identity mod-char-list "-") | |
841 | "-" | |
842 | base-key-name)))))) | |
843 | )) | |
844 | ||
845 | ||
846 | ;; Args can be a sequence of events, a string, or a Viper macro. Will try to | |
847 | ;; convert events to keys and, if all keys are regular printable | |
848 | ;; characters, will return a string. Otherwise, will return a string | |
849 | ;; representing a vector of converted events. If the input was a Viper macro, | |
850 | ;; will return a string that represents this macro as a vector. | |
851 | (defun vip-array-to-string (event-seq &optional representation) | |
852 | (let (temp) | |
853 | (cond ((stringp event-seq) event-seq) | |
854 | ((vip-event-vector-p event-seq) | |
855 | (setq temp (mapcar 'vip-event-key event-seq)) | |
856 | (if (vip-char-symbol-sequence-p temp) | |
857 | (mapconcat 'symbol-name temp "") | |
858 | (prin1-to-string (vconcat temp)))) | |
859 | ((vip-char-symbol-sequence-p event-seq) | |
860 | (mapconcat 'symbol-name event-seq "")) | |
861 | (t (prin1-to-string event-seq))))) | |
e0c82342 MK |
862 | |
863 | (defun vip-key-press-events-to-chars (events) | |
864 | (mapconcat (if vip-emacs-p | |
865 | 'char-to-string | |
866 | (function | |
867 | (lambda (elt) (char-to-string (event-to-character elt))))) | |
868 | events | |
869 | "")) | |
6c2e12f4 KH |
870 | |
871 | ||
872 | (defsubst vip-fast-keysequence-p () | |
873 | (not (vip-sit-for-short vip-fast-keyseq-timeout t))) | |
874 | ||
875 | (defun vip-read-char-exclusive () | |
876 | (let (char | |
877 | (echo-keystrokes 1)) | |
878 | (while (null char) | |
879 | (condition-case nil | |
880 | (setq char (read-char)) | |
881 | (error | |
882 | ;; skip event if not char | |
883 | (vip-read-event)))) | |
884 | char)) | |
885 | ||
886 | ||
887 | ||
888 | (defun vip-setup-master-buffer (&rest other-files-or-buffers) | |
889 | "Set up the current buffer as a master buffer. | |
890 | Arguments become related buffers. This function should normally be used in | |
891 | the `Local variables' section of a file." | |
892 | (setq vip-related-files-and-buffers-ring | |
893 | (make-ring (1+ (length other-files-or-buffers)))) | |
894 | (mapcar '(lambda (elt) | |
895 | (vip-ring-insert vip-related-files-and-buffers-ring elt)) | |
896 | other-files-or-buffers) | |
897 | (vip-ring-insert vip-related-files-and-buffers-ring (buffer-name)) | |
898 | ) | |
e0c82342 MK |
899 | |
900 | ;;; Movement utilities | |
901 | ||
902 | (defvar vip-syntax-preference 'strict-vi | |
903 | "*Syntax type characterizing Viper's alphanumeric symbols. | |
904 | `emacs' means only word constituents are considered to be alphanumeric. | |
905 | Word constituents are symbols specified as word constituents by the current | |
906 | syntax table. | |
907 | `extended' means word and symbol constituents. | |
908 | `reformed-vi' means Vi-ish behavior: word constituents and the symbol `_'. | |
909 | However, word constituents are determined according to Emacs syntax tables, | |
910 | which may be different from Vi in some major modes. | |
911 | `strict-vi' means Viper words are exactly as in Vi.") | |
912 | ||
913 | (vip-deflocalvar vip-ALPHA-char-class "w" | |
914 | "String of syntax classes characterizing Viper's alphanumeric symbols. | |
915 | In addition, the symbol `_' may be considered alphanumeric if | |
916 | `vip-syntax-preference'is `reformed-vi'.") | |
917 | ||
918 | (vip-deflocalvar vip-strict-ALPHA-chars "a-zA-Z0-9_" | |
919 | "Regexp matching the set of alphanumeric characters acceptable to strict | |
920 | Vi.") | |
921 | (vip-deflocalvar vip-strict-SEP-chars " \t\n" | |
922 | "Regexp matching the set of alphanumeric characters acceptable to strict | |
923 | Vi.") | |
924 | ||
925 | (vip-deflocalvar vip-SEP-char-class " -" | |
926 | "String of syntax classes for Vi separators. | |
927 | Usually contains ` ', linefeed, TAB or formfeed.") | |
928 | ||
929 | (defun vip-update-alphanumeric-class () | |
930 | "Set the syntactic class of Viper alphanumeric symbols according to | |
931 | the variable `vip-ALPHA-char-class'. Should be called in order for changes to | |
932 | `vip-ALPHA-char-class' to take effect." | |
933 | (interactive) | |
934 | (setq-default | |
935 | vip-ALPHA-char-class | |
936 | (cond ((eq vip-syntax-preference 'emacs) "w") ; only word constituents | |
937 | ((eq vip-syntax-preference 'extended) "w_") ; word & symbol chars | |
938 | (t "w")))) ; vi syntax: word constituents and the symbol `_' | |
939 | ||
940 | ;; addl-chars are characters to be temporarily considered as alphanumerical | |
941 | (defun vip-looking-at-alpha (&optional addl-chars) | |
942 | (or (stringp addl-chars) (setq addl-chars "")) | |
943 | (if (eq vip-syntax-preference 'reformed-vi) | |
944 | (setq addl-chars (concat addl-chars "_"))) | |
945 | (let ((char (char-after (point)))) | |
946 | (if char | |
947 | (if (eq vip-syntax-preference 'strict-vi) | |
948 | (looking-at (concat "[" vip-strict-ALPHA-chars addl-chars "]")) | |
949 | (or (memq char | |
950 | ;; convert string to list | |
951 | (append (vconcat addl-chars) nil)) | |
952 | (memq (char-syntax char) | |
953 | (append (vconcat vip-ALPHA-char-class) nil))))) | |
954 | )) | |
955 | ||
956 | (defsubst vip-looking-at-separator () | |
957 | (let ((char (char-after (point)))) | |
958 | (if char | |
959 | (or (eq char ?\n) ; RET is always a separator in Vi | |
960 | (memq (char-syntax char) | |
961 | (append (vconcat vip-SEP-char-class) nil)))))) | |
962 | ||
963 | (defsubst vip-looking-at-alphasep (&optional addl-chars) | |
964 | (or (vip-looking-at-separator) (vip-looking-at-alpha addl-chars))) | |
965 | ||
966 | (defsubst vip-skip-alpha-forward (&optional addl-chars) | |
967 | (or (stringp addl-chars) (setq addl-chars "")) | |
968 | (vip-skip-syntax | |
969 | 'forward | |
970 | (cond ((eq vip-syntax-preference 'strict-vi) | |
971 | "") | |
972 | (t vip-ALPHA-char-class )) | |
973 | (cond ((eq vip-syntax-preference 'strict-vi) | |
974 | (concat vip-strict-ALPHA-chars addl-chars)) | |
975 | (t addl-chars)))) | |
976 | ||
977 | (defsubst vip-skip-alpha-backward (&optional addl-chars) | |
978 | (or (stringp addl-chars) (setq addl-chars "")) | |
979 | (vip-skip-syntax | |
980 | 'backward | |
981 | (cond ((eq vip-syntax-preference 'strict-vi) | |
982 | "") | |
983 | (t vip-ALPHA-char-class )) | |
984 | (cond ((eq vip-syntax-preference 'strict-vi) | |
985 | (concat vip-strict-ALPHA-chars addl-chars)) | |
986 | (t addl-chars)))) | |
987 | ||
988 | ;; weird syntax tables may confuse strict-vi style | |
989 | (defsubst vip-skip-all-separators-forward (&optional within-line) | |
990 | (vip-skip-syntax 'forward | |
991 | vip-SEP-char-class | |
992 | (or within-line "\n") | |
993 | (if within-line (vip-line-pos 'end)))) | |
994 | (defsubst vip-skip-all-separators-backward (&optional within-line) | |
995 | (vip-skip-syntax 'backward | |
996 | vip-SEP-char-class | |
997 | (or within-line "\n") | |
998 | (if within-line (vip-line-pos 'start)))) | |
999 | (defun vip-skip-nonseparators (direction) | |
1000 | (let ((func (intern (format "skip-syntax-%S" direction)))) | |
1001 | (funcall func (concat "^" vip-SEP-char-class) | |
1002 | (vip-line-pos (if (eq direction 'forward) 'end 'start))))) | |
1003 | ||
1004 | (defsubst vip-skip-nonalphasep-forward () | |
1005 | (if (eq vip-syntax-preference 'strict-vi) | |
1006 | (skip-chars-forward | |
1007 | (concat "^" vip-strict-SEP-chars vip-strict-ALPHA-chars)) | |
1008 | (skip-syntax-forward | |
1009 | (concat | |
1010 | "^" vip-ALPHA-char-class vip-SEP-char-class) (vip-line-pos 'end)))) | |
1011 | (defsubst vip-skip-nonalphasep-backward () | |
1012 | (if (eq vip-syntax-preference 'strict-vi) | |
1013 | (skip-chars-backward | |
1014 | (concat "^" vip-strict-SEP-chars vip-strict-ALPHA-chars)) | |
1015 | (skip-syntax-backward | |
1016 | (concat | |
1017 | "^" vip-ALPHA-char-class vip-SEP-char-class) (vip-line-pos 'start)))) | |
1018 | ||
1019 | ;; Skip SYNTAX like skip-syntax-* and ADDL-CHARS like skip-chars-* | |
1020 | ;; Return the number of chars traveled. | |
1021 | ;; Either SYNTAX or ADDL-CHARS can be nil, in which case they are interpreted | |
1022 | ;; as an empty string. | |
1023 | (defun vip-skip-syntax (direction syntax addl-chars &optional limit) | |
1024 | (let ((total 0) | |
1025 | (local 1) | |
1026 | (skip-chars-func (intern (format "skip-chars-%S" direction))) | |
1027 | (skip-syntax-func (intern (format "skip-syntax-%S" direction)))) | |
1028 | (or (stringp addl-chars) (setq addl-chars "")) | |
1029 | (or (stringp syntax) (setq syntax "")) | |
1030 | (while (and (not (= local 0)) (not (eobp))) | |
1031 | (setq local | |
1032 | (+ (funcall skip-syntax-func syntax limit) | |
1033 | (funcall skip-chars-func addl-chars limit))) | |
1034 | (setq total (+ total local))) | |
1035 | total | |
1036 | )) | |
1037 | ||
1038 | ||
6c2e12f4 KH |
1039 | |
1040 | ||
1041 | (provide 'viper-util) | |
1042 | ||
1043 | ;;; viper-util.el ends here |