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comparison lisp/emulators/mlsupport.el @ 0:376386a54a3c r19-14

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date Mon, 13 Aug 2007 08:45:50 +0200
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1 ;;; mlsupport.el --- run-time support for mocklisp code.
2
3 ;; Copyright (C) 1985 Free Software Foundation, Inc.
4
5 ;; Maintainer: FSF
6 ;; Keywords: extensions
7
8 ;; This file is part of XEmacs.
9
10 ;; XEmacs is free software; you can redistribute it and/or modify it
11 ;; under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; any later version.
14
15 ;; XEmacs is distributed in the hope that it will be useful, but
16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ;; General Public License for more details.
19
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
22 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23
24 ;;; Synched up with: FSF 19.30.
25
26 ;;; Commentary:
27
28 ;; This package provides equivalents of certain primitives from Gosling
29 ;; Emacs (including the commercial UniPress versions). These have an
30 ;; ml- prefix to distinguish them from native GNU Emacs functions with
31 ;; similar names. The oackage mlconvert.el translates Mocklisp code
32 ;; to use these names.
33
34 ;;; Code:
35
36 (or (fboundp 'ml-prefix-argument-loop)
37 (error "emacs was not compiled with #define MOCKLISP_SUPPORT in config.h"))
38
39 (defmacro ml-defun (&rest defs)
40 (list 'ml-defun-1 (list 'quote defs)))
41
42 (defun ml-defun-1 (args)
43 (while args
44 (fset (car (car args)) (cons 'mocklisp (cdr (car args))))
45 (setq args (cdr args))))
46
47 (defmacro declare-buffer-specific (&rest vars)
48 (cons 'progn
49 (mapcar (function (lambda (var)
50 (list 'make-variable-buffer-local (list 'quote var))))
51 vars)))
52
53 (defun ml-set-default (varname value)
54 (set-default (intern varname) value))
55
56 ; Lossage: must make various things default missing args to the prefix arg
57 ; Alternatively, must make provide-prefix-argument do something hairy.
58
59 (defun >> (val count)
60 (lsh val (- count)))
61 (defun novalue ()
62 nil)
63
64 (defun ml-not (arg)
65 (if (zerop arg) 1 0))
66
67 (defun provide-prefix-arg (arg form)
68 (funcall (car form) arg))
69
70 (defun define-keymap (name)
71 (fset (intern name) (make-keymap)))
72
73 (defun ml-use-local-map (name)
74 (use-local-map (intern (concat name "-map"))))
75
76 (defun ml-use-global-map (name)
77 (use-global-map (intern (concat name "-map"))))
78
79 (defun local-bind-to-key (name key)
80 (or (current-local-map)
81 (use-local-map (make-keymap)))
82 (define-key (current-local-map)
83 (if (integerp key)
84 (if (>= key 128)
85 (concat (char-to-string meta-prefix-char)
86 (char-to-string (- key 128)))
87 (char-to-string key))
88 key)
89 (intern name)))
90
91 (defun bind-to-key (name key)
92 (define-key global-map (if (integerp key) (char-to-string key) key)
93 (intern name)))
94
95 (defun ml-autoload (name file)
96 (autoload (intern name) file))
97
98 (defun ml-define-string-macro (name defn)
99 (fset (intern name) defn))
100
101 (defun push-back-character (char)
102 (setq unread-command-event (character-to-event char)))
103
104 (defun to-col (column)
105 (indent-to column 0))
106
107 (defmacro is-bound (&rest syms)
108 (cons 'and (mapcar (function (lambda (sym) (list 'boundp (list 'quote sym)))) syms)))
109
110 (defmacro declare-global (&rest syms)
111 (cons 'progn (mapcar (function (lambda (sym) (list 'defvar sym nil))) syms)))
112
113 (defmacro error-occurred (&rest body)
114 (list 'condition-case nil (cons 'progn (append body '(nil))) '(error t)))
115
116 (defun return-prefix-argument (value)
117 (setq prefix-arg value))
118
119 (defun ml-prefix-argument ()
120 (cond ((null current-prefix-arg)
121 1)
122 ((listp current-prefix-arg)
123 (car current-prefix-arg))
124 ((eq current-prefix-arg '-)
125 -1)
126 (t
127 current-prefix-arg)))
128
129 (defun ml-print (varname)
130 (interactive "vPrint variable: ")
131 (if (boundp varname)
132 (message "%s => %s" (symbol-name varname) (symbol-value varname))
133 (message "%s has no value" (symbol-name varname))))
134
135 (defun ml-set (str val) (set (intern str) val))
136
137 (defun ml-message (&rest args) (message "%s" (apply 'concat args)))
138
139 (defun kill-to-end-of-line ()
140 (ml-prefix-argument-loop
141 (if (eolp)
142 (kill-region (point) (1+ (point)))
143 (kill-region (point) (if (search-forward ?\n nil t)
144 (1- (point)) (point-max))))))
145
146 (defun set-auto-fill-hook (arg)
147 (setq auto-fill-function (intern arg)))
148
149 (defun auto-execute (function pattern)
150 (if (/= (aref pattern 0) ?*)
151 (error "Only patterns starting with * supported in auto-execute"))
152 (setq auto-mode-alist (cons (cons (concat "\\." (substring pattern 1)
153 "\\'")
154 function)
155 auto-mode-alist)))
156
157 (defun move-to-comment-column ()
158 (indent-to comment-column))
159
160 (defun erase-region ()
161 (delete-region (point) (mark)))
162
163 (defun delete-region-to-buffer (bufname)
164 (copy-to-buffer bufname (point) (mark))
165 (delete-region (point) (mark)))
166
167 (defun copy-region-to-buffer (bufname)
168 (copy-to-buffer bufname (point) (mark)))
169
170 (defun append-region-to-buffer (bufname)
171 (append-to-buffer bufname (point) (mark)))
172
173 (defun prepend-region-to-buffer (bufname)
174 (prepend-to-buffer bufname (point) (mark)))
175
176 (defun delete-next-character ()
177 (delete-char (ml-prefix-argument)))
178
179 (defun delete-next-word ()
180 (delete-region (point)
181 (progn (forward-word (ml-prefix-argument)) (point))))
182
183 (defun delete-previous-word ()
184 (delete-region (point)
185 (progn (backward-word (ml-prefix-argument)) (point))))
186
187 (defun delete-previous-character ()
188 (delete-backward-char (ml-prefix-argument)))
189
190 (defun forward-character ()
191 (forward-char (ml-prefix-argument)))
192
193 (defun backward-character ()
194 (backward-char (ml-prefix-argument)))
195
196 (defun ml-newline ()
197 (newline (ml-prefix-argument)))
198
199 (defun ml-next-line ()
200 (next-line (ml-prefix-argument)))
201
202 (defun ml-previous-line ()
203 (previous-line (ml-prefix-argument)))
204
205 (defun delete-to-kill-buffer ()
206 (kill-region (point) (mark)))
207
208 (defun narrow-region ()
209 (narrow-to-region (point) (mark)))
210
211 (defun ml-newline-and-indent ()
212 (let ((column (current-indentation)))
213 (newline (ml-prefix-argument))
214 (indent-to column)))
215
216 (defun newline-and-backup ()
217 (open-line (ml-prefix-argument)))
218
219 (defun quote-char ()
220 (quoted-insert (ml-prefix-argument)))
221
222 (defun ml-current-column ()
223 (1+ (current-column)))
224
225 (defun ml-current-indent ()
226 (1+ (current-indentation)))
227
228 (defun region-around-match (&optional n)
229 (set-mark (match-beginning n))
230 (goto-char (match-end n)))
231
232 (defun region-to-string ()
233 (buffer-substring (min (point) (mark)) (max (point) (mark))))
234
235 (defun use-abbrev-table (name)
236 (let ((symbol (intern (concat name "-abbrev-table"))))
237 (or (boundp symbol)
238 (define-abbrev-table symbol nil))
239 (symbol-value symbol)))
240
241 (defun define-hooked-local-abbrev (name exp hook)
242 (define-abbrev (or local-abbrev-table
243 (error "Major mode has no abbrev table"))
244 (downcase name)
245 exp (intern hook)))
246
247 (defun define-hooked-global-abbrev (name exp hook)
248 (define-abbrev global-abbrev-table (downcase name)
249 exp (intern hook)))
250
251 (defun case-word-lower ()
252 (ml-casify-word 'downcase-region))
253
254 (defun case-word-upper ()
255 (ml-casify-word 'upcase-region))
256
257 (defun case-word-capitalize ()
258 (ml-casify-word 'capitalize-region))
259
260 (defun ml-casify-word (fun)
261 (save-excursion
262 (forward-char 1)
263 (forward-word -1)
264 (funcall fun (point)
265 (progn (forward-word (ml-prefix-argument))
266 (point)))))
267
268 (defun case-region-lower ()
269 (downcase-region (point) (mark)))
270
271 (defun case-region-upper ()
272 (upcase-region (point) (mark)))
273
274 (defun case-region-capitalize ()
275 (capitalize-region (point) (mark)))
276
277 (defvar saved-command-line-args nil)
278
279 (defun argc ()
280 (or saved-command-line-args
281 (setq saved-command-line-args command-line-args
282 command-line-args ()))
283 (length command-line-args))
284
285 (defun argv (i)
286 (or saved-command-line-args
287 (setq saved-command-line-args command-line-args
288 command-line-args ()))
289 (nth i saved-command-line-args))
290
291 (defun invisible-argc ()
292 (length (or saved-command-line-args
293 command-line-args)))
294
295 (defun invisible-argv (i)
296 (nth i (or saved-command-line-args
297 command-line-args)))
298
299 (defun exit-emacs ()
300 (interactive)
301 (condition-case ()
302 (exit-recursive-edit)
303 (error (kill-emacs))))
304
305 ;; Lisp function buffer-size returns total including invisible;
306 ;; mocklisp wants just visible.
307 (defun ml-buffer-size ()
308 (- (point-max) (point-min)))
309
310 (defun previous-command ()
311 last-command)
312
313 (defun beginning-of-window ()
314 (goto-char (window-start)))
315
316 (defun end-of-window ()
317 (goto-char (window-start))
318 (vertical-motion (- (window-height) 2)))
319
320 (defun ml-search-forward (string)
321 (search-forward string nil nil (ml-prefix-argument)))
322
323 (defun ml-re-search-forward (string)
324 (re-search-forward string nil nil (ml-prefix-argument)))
325
326 (defun ml-search-backward (string)
327 (search-backward string nil nil (ml-prefix-argument)))
328
329 (defun ml-re-search-backward (string)
330 (re-search-backward string nil nil (ml-prefix-argument)))
331
332 (defvar use-users-shell 1
333 "Mocklisp compatibility variable; 1 means use shell from SHELL env var.
334 0 means use /bin/sh.")
335
336 (defvar use-csh-option-f 1
337 "Mocklisp compatibility variable; 1 means pass -f when calling csh.")
338
339 (defun filter-region (command)
340 (let* ((shell (if (/= use-users-shell 0) shell-file-name "/bin/sh"))
341 (csh (equal (file-name-nondirectory shell) "csh")))
342 (call-process-region (point) (mark) shell t t nil
343 (if (and csh use-csh-option-f) "-cf" "-c")
344 (concat "exec " command))))
345
346 (defun execute-monitor-command (command)
347 (let* ((shell (if (/= use-users-shell 0) shell-file-name "/bin/sh"))
348 (csh (equal (file-name-nondirectory shell) "csh")))
349 (call-process shell nil t t
350 (if (and csh use-csh-option-f) "-cf" "-c")
351 (concat "exec " command))))
352
353 (defun use-syntax-table (name)
354 (set-syntax-table (symbol-value (intern (concat name "-syntax-table")))))
355
356 (defun line-to-top-of-window ()
357 (recenter (1- (ml-prefix-argument))))
358
359 (defun ml-previous-page (&optional arg)
360 (let ((count (or arg (ml-prefix-argument))))
361 (while (> count 0)
362 (scroll-down nil)
363 (setq count (1- count)))
364 (while (< count 0)
365 (scroll-up nil)
366 (setq count (1+ count)))))
367
368 (defun ml-next-page ()
369 (ml-previous-page (- (ml-prefix-argument))))
370
371 (defun page-next-window (&optional arg)
372 (let ((count (or arg (ml-prefix-argument))))
373 (while (> count 0)
374 (scroll-other-window nil)
375 (setq count (1- count)))
376 (while (< count 0)
377 (scroll-other-window '-)
378 (setq count (1+ count)))))
379
380 (defun ml-next-window ()
381 (select-window (next-window)))
382
383 (defun ml-previous-window ()
384 (select-window (previous-window)))
385
386 (defun scroll-one-line-up ()
387 (scroll-up (ml-prefix-argument)))
388
389 (defun scroll-one-line-down ()
390 (scroll-down (ml-prefix-argument)))
391
392 (defun split-current-window ()
393 (split-window (selected-window)))
394
395 (defun last-key-struck () last-command-char)
396
397 (defun execute-mlisp-line (string)
398 (eval (read string)))
399
400 (defun move-dot-to-x-y (x y)
401 (goto-char (window-start (selected-window)))
402 (vertical-motion (1- y))
403 (move-to-column (1- x)))
404
405 (defun ml-modify-syntax-entry (string)
406 (let ((i 5)
407 (len (length string))
408 (datastring (substring string 0 2)))
409 (if (= (aref string 0) ?\-)
410 (aset datastring 0 ?\ ))
411 (if (= (aref string 2) ?\{)
412 (if (= (aref string 4) ?\ )
413 (aset datastring 0 ?\<)
414 (error "Two-char comment delimiter: use modify-syntax-entry directly")))
415 (if (= (aref string 3) ?\})
416 (if (= (aref string 4) ?\ )
417 (aset datastring 0 ?\>)
418 (error "Two-char comment delimiter: use modify-syntax-entry directly")))
419 (while (< i len)
420 (modify-syntax-entry (aref string i) datastring)
421 (setq i (1+ i))
422 (if (and (< i len)
423 (= (aref string i) ?\-))
424 (let ((c (aref string (1- i)))
425 (lim (aref string (1+ i))))
426 (while (<= c lim)
427 (modify-syntax-entry c datastring)
428 (setq c (1+ c)))
429 (setq i (+ 2 i)))))))
430
431
432
433 (defun ml-substr (string from to)
434 (let ((length (length string)))
435 (if (< from 0) (setq from (+ from length)))
436 (if (< to 0) (setq to (+ to length)))
437 (substring string from (+ from to))))
438
439
440 (defun ml-nargs ()
441 "Number of arguments to currently executing mocklisp function."
442 (if (eq mocklisp-arguments 'interactive)
443 0
444 (length mocklisp-arguments)))
445
446 (defun ml-arg (n prompt)
447 "Argument number N to currently executing mocklisp function."
448 (if (eq mocklisp-arguments 'interactive)
449 (read-from-minibuffer prompt)
450 ;; Mocklisp likes to be origin 1
451 (elt mocklisp-arguments (1- n))))
452
453 (defun ml-interactive ()
454 "True if currently executing mocklisp function was called interactively."
455 (eq mocklisp-arguments 'interactive))
456
457 ;; Now in subr.el, because too many loser call it.
458 ;(defun insert-string (&rest args)
459 ; "Mocklisp-compatibility insert function.
460 ;Like the function `insert' except that any argument that is a number
461 ;is converted into a string by expressing it in decimal. (Yuck!!)"
462 ; (while args
463 ; (let ((arg (car args)))
464 ; (if (integerp arg)
465 ; (insert (number-to-string arg))
466 ; (insert arg))
467 ; (setq args (cdr args)))))
468
469 (defun ml-concat (&rest args)
470 (let ((newargs nil) this)
471 (while args
472 (setq this (car args))
473 (if (numberp this)
474 (setq this (number-to-string this)))
475 (setq newargs (cons this newargs)
476 args (cdr args)))
477 (apply 'concat (nreverse newargs))))
478
479
480 ;;; Lose, please. None of these should be used in non-automatically-converted
481 ;;; code, so issue compilation warnings in case someone is using them because
482 ;;; they don't know any better.
483
484 (make-obsolete 'read-no-blanks-input 'read-string)
485 (make-obsolete 'declare-buffer-specific 'make-variable-buffer-local)
486 (make-obsolete '>> 'lsh)
487 (make-obsolete 'novalue 'ignore)
488 (make-obsolete 'define-keymap "use (fset 'symbol (make-keymap))")
489 (make-obsolete 'local-bind-to-key 'local-set-key)
490 (make-obsolete 'bind-to-key 'global-set-key)
491 (make-obsolete 'to-col 'indent-to)
492 (make-obsolete 'is-bound 'boundp)
493 (make-obsolete 'declare-global 'defvar)
494 (make-obsolete 'error-occurred 'condition-case)
495 (make-obsolete 'set-auto-fill-hook "set variable auto-fill-function instead")
496 (make-obsolete 'auto-execute "set variable auto-mode-alist instead")
497 (make-obsolete 'move-to-comment-column "use (indent-to comment-column)")
498 (make-obsolete 'erase-region 'delete-region)
499 (make-obsolete 'delete-region-to-buffer "use copy-to-buffer and delete-region")
500 (make-obsolete 'copy-region-to-buffer 'copy-to-buffer)
501 (make-obsolete 'append-region-to-buffer 'append-to-buffer)
502 (make-obsolete 'prepend-region-to-buffer 'prepend-to-buffer)
503 (make-obsolete 'delete-next-character 'delete-char)
504 (make-obsolete 'forward-character 'forward-char)
505 (make-obsolete 'backward-character 'backward-char)
506 (make-obsolete 'delete-to-kill-buffer 'kill-region)
507 (make-obsolete 'narrow-region 'narrow-to-region)
508 (make-obsolete 'newline-and-backup 'open-line)
509 (make-obsolete 'quote-char 'quoted-insert)
510 (make-obsolete 'region-to-string 'buffer-substring)
511 (make-obsolete 'define-hooked-local-abbrev 'define-abbrev)
512 (make-obsolete 'define-hooked-global-abbrev 'define-abbrev)
513 (make-obsolete 'filter-region 'call-process-region)
514 (make-obsolete 'execute-monitor-command 'call-process)
515 (make-obsolete 'use-syntax-table 'set-syntax-table)
516 (make-obsolete 'line-to-top-of-window 'recenter)
517 (make-obsolete 'insert-string 'insert)
518
519 (provide 'mlsupport)
520
521 ;;; mlsupport.el ends here