lisp/emulation/mlsupport.el

   1 ;;; mlsupport.el --- run-time support for mocklisp code.
   2
   3 ;; Maintainer: FSF
   4 ;; Last-Modified: 16 Mar 1992
   5
   6 ;; Copyright (C) 1985 Free Software Foundation, Inc.
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it 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 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  22 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 ;;; Code:
  25
  26 (defmacro ml-defun (&rest defs)
  27   (list 'ml-defun-1 (list 'quote defs)))
  28
  29 (defun ml-defun-1 (args)
  30   (while args
  31     (fset (car (car args)) (cons 'mocklisp (cdr (car args))))
  32     (setq args (cdr args))))
  33
  34 (defmacro declare-buffer-specific (&rest vars)
  35   (cons 'progn (mapcar (function (lambda (var) (list 'make-variable-buffer-local (list 'quote var)))) vars)))
  36
  37 (defun ml-set-default (varname value)
  38   (set-default (intern varname) value))
  39
  40 ; Lossage: must make various things default missing args to the prefix arg
  41 ; Alternatively, must make provide-prefix-argument do something hairy.
  42
  43 (defun >> (val count) (lsh val (- count)))
  44 (defun novalue () nil)
  45
  46 (defun ml-not (arg) (if (zerop arg) 1 0))
  47
  48 (defun provide-prefix-arg (arg form)
  49   (funcall (car form) arg))
  50
  51 (defun define-keymap (name)
  52   (fset (intern name) (make-keymap)))
  53
  54 (defun ml-use-local-map (name)
  55   (use-local-map (intern (concat name "-map"))))
  56
  57 (defun ml-use-global-map (name)
  58   (use-global-map (intern (concat name "-map"))))
  59
  60 (defun local-bind-to-key (name key)
  61   (or (current-local-map)
  62       (use-local-map (make-keymap)))
  63   (define-key (current-local-map)
  64     (if (integerp key)
  65         (if (>= key 128)
  66             (concat (char-to-string meta-prefix-char)
  67                     (char-to-string (- key 128)))
  68           (char-to-string key))
  69       key)
  70     (intern name)))
  71
  72 (defun bind-to-key (name key)
  73   (define-key global-map (if (integerp key) (char-to-string key) key)
  74     (intern name)))
  75
  76 (defun ml-autoload (name file)
  77   (autoload (intern name) file))
  78
  79 (defun ml-define-string-macro (name defn)
  80   (fset (intern name) defn))
  81
  82 (defun push-back-character (char)
  83   (setq unread-command-char char))
  84
  85 (defun to-col (column)
  86   (indent-to column 0))
  87
  88 (defmacro is-bound (&rest syms)
  89   (cons 'and (mapcar (function (lambda (sym) (list 'boundp (list 'quote sym)))) syms)))
  90
  91 (defmacro declare-global (&rest syms)
  92   (cons 'progn (mapcar (function (lambda (sym) (list 'defvar sym nil))) syms)))
  93
  94 (defmacro error-occurred (&rest body)
  95   (list 'condition-case nil (cons 'progn (append body '(nil))) '(error t)))
  96
  97 (defun return-prefix-argument (value)
  98   (setq prefix-arg value))
  99
 100 (defun ml-prefix-argument ()
 101   (if (null current-prefix-arg) 1
 102     (if (listp current-prefix-arg) (car current-prefix-arg)
 103       (if (eq current-prefix-arg '-) -1
 104         current-prefix-arg))))
 105
 106 (defun ml-print (varname)
 107   (interactive "vPrint variable: ")
 108   (if (boundp varname)
 109     (message "%s => %s" (symbol-name varname) (symbol-value varname))
 110     (message "%s has no value" (symbol-name varname))))
 111
 112 (defun ml-set (str val) (set (intern str) val))
 113
 114 (defun ml-message (&rest args) (message "%s" (apply 'concat args)))
 115
 116 (defun kill-to-end-of-line ()
 117   (ml-prefix-argument-loop
 118     (if (eolp)
 119         (kill-region (point) (1+ (point)))
 120       (kill-region (point) (if (search-forward ?\n nil t)
 121                                (1- (point)) (point-max))))))
 122
 123 (defun set-auto-fill-hook (arg)
 124   (setq auto-fill-function (intern arg)))
 125
 126 (defun auto-execute (function pattern)
 127   (if (/= (aref pattern 0) ?*)
 128       (error "Only patterns starting with * supported in auto-execute"))
 129   (setq auto-mode-alist (cons (cons (concat "\\." (substring pattern 1)
 130                                             "$")
 131                                     function)
 132                               auto-mode-alist)))
 133
 134 (defun move-to-comment-column ()
 135   (indent-to comment-column))
 136
 137 (defun erase-region ()
 138   (delete-region (point) (mark)))
 139
 140 (defun delete-region-to-buffer (bufname)
 141   (copy-to-buffer bufname (point) (mark))
 142   (delete-region (point) (mark)))
 143
 144 (defun copy-region-to-buffer (bufname)
 145   (copy-to-buffer bufname (point) (mark)))
 146
 147 (defun append-region-to-buffer (bufname)
 148   (append-to-buffer bufname (point) (mark)))
 149
 150 (defun prepend-region-to-buffer (bufname)
 151   (prepend-to-buffer bufname (point) (mark)))
 152
 153 (defun delete-next-character ()
 154   (delete-char (ml-prefix-argument)))
 155
 156 (defun delete-next-word ()
 157   (delete-region (point) (progn (forward-word (ml-prefix-argument)) (point))))
 158
 159 (defun delete-previous-word ()
 160   (delete-region (point) (progn (backward-word (ml-prefix-argument)) (point))))
 161
 162 (defun delete-previous-character ()
 163   (delete-backward-char (ml-prefix-argument)))
 164
 165 (defun forward-character ()
 166   (forward-char (ml-prefix-argument)))
 167
 168 (defun backward-character ()
 169   (backward-char (ml-prefix-argument)))
 170
 171 (defun ml-newline ()
 172   (newline (ml-prefix-argument)))
 173
 174 (defun ml-next-line ()
 175   (next-line (ml-prefix-argument)))
 176
 177 (defun ml-previous-line ()
 178   (previous-line (ml-prefix-argument)))
 179
 180 (defun delete-to-kill-buffer ()
 181   (kill-region (point) (mark)))
 182
 183 (defun narrow-region ()
 184   (narrow-to-region (point) (mark)))
 185
 186 (defun ml-newline-and-indent ()
 187   (let ((column (current-indentation)))
 188     (newline (ml-prefix-argument))
 189     (indent-to column)))
 190
 191 (defun newline-and-backup ()
 192   (open-line (ml-prefix-argument)))
 193
 194 (defun quote-char ()
 195   (quoted-insert (ml-prefix-argument)))
 196
 197 (defun ml-current-column ()
 198   (1+ (current-column)))
 199
 200 (defun ml-current-indent ()
 201   (1+ (current-indentation)))
 202
 203 (defun region-around-match (&optional n)
 204   (set-mark (match-beginning n))
 205   (goto-char (match-end n)))
 206
 207 (defun region-to-string ()
 208   (buffer-substring (min (point) (mark)) (max (point) (mark))))
 209
 210 (defun use-abbrev-table (name)
 211   (let ((symbol (intern (concat name "-abbrev-table"))))
 212     (or (boundp symbol)
 213         (define-abbrev-table symbol nil))
 214     (symbol-value symbol)))
 215
 216 (defun define-hooked-local-abbrev (name exp hook)
 217   (define-local-abbrev name exp (intern hook)))
 218
 219 (defun define-hooked-global-abbrev (name exp hook)
 220   (define-global-abbrev name exp (intern hook)))
 221
 222 (defun case-word-lower ()
 223   (ml-casify-word 'downcase-region))
 224
 225 (defun case-word-upper ()
 226   (ml-casify-word 'upcase-region))
 227
 228 (defun case-word-capitalize ()
 229   (ml-casify-word 'capitalize-region))
 230
 231 (defun ml-casify-word (fun)
 232   (save-excursion
 233    (forward-char 1)
 234    (forward-word -1)
 235    (funcall fun (point)
 236             (progn (forward-word (ml-prefix-argument))
 237                    (point)))))
 238
 239 (defun case-region-lower ()
 240   (downcase-region (point) (mark)))
 241
 242 (defun case-region-upper ()
 243   (upcase-region (point) (mark)))
 244
 245 (defun case-region-capitalize ()
 246   (capitalize-region (point) (mark)))
 247 \f
 248 (defvar saved-command-line-args nil)
 249
 250 (defun argc ()
 251   (or saved-command-line-args
 252       (setq saved-command-line-args command-line-args
 253             command-line-args ()))
 254   (length command-line-args))
 255
 256 (defun argv (i)
 257   (or saved-command-line-args
 258       (setq saved-command-line-args command-line-args
 259             command-line-args ()))
 260   (nth i saved-command-line-args))
 261
 262 (defun invisible-argc ()
 263   (length (or saved-command-line-args
 264               command-line-args)))
 265
 266 (defun invisible-argv (i)
 267   (nth i (or saved-command-line-args
 268              command-line-args)))
 269
 270 (defun exit-emacs ()
 271   (interactive)
 272   (condition-case ()
 273       (exit-recursive-edit)
 274     (error (kill-emacs))))
 275 \f
 276 ;; Lisp function buffer-size returns total including invisible;
 277 ;; mocklisp wants just visible.
 278 (defun ml-buffer-size ()
 279   (- (point-max) (point-min)))
 280
 281 (defun previous-command ()
 282   last-command)
 283
 284 (defun beginning-of-window ()
 285   (goto-char (window-start)))
 286
 287 (defun end-of-window ()
 288   (goto-char (window-start))
 289   (vertical-motion (- (window-height) 2)))
 290 \f
 291 (defun ml-search-forward (string)
 292   (search-forward string nil nil (ml-prefix-argument)))
 293
 294 (defun ml-re-search-forward (string)
 295   (re-search-forward string nil nil (ml-prefix-argument)))
 296
 297 (defun ml-search-backward (string)
 298   (search-backward string nil nil (ml-prefix-argument)))
 299
 300 (defun ml-re-search-backward (string)
 301   (re-search-backward string nil nil (ml-prefix-argument)))
 302
 303 (defvar use-users-shell 1
 304   "Mocklisp compatibility variable; 1 means use shell from SHELL env var.
 305 0 means use /bin/sh.")
 306
 307 (defvar use-csh-option-f 1
 308   "Mocklisp compatibility variable; 1 means pass -f when calling csh.")
 309
 310 (defun filter-region (command)
 311   (let ((shell (if (/= use-users-shell 0) shell-file-name "/bin/sh"))
 312         (csh (equal (file-name-nondirectory shell) "csh")))
 313     (call-process-region (point) (mark) shell t t nil
 314                          (if (and csh use-csh-option-f) "-cf" "-c")
 315                          (concat "exec " command))))
 316
 317 (defun execute-monitor-command (command)
 318   (let ((shell (if (/= use-users-shell 0) shell-file-name "/bin/sh"))
 319         (csh (equal (file-name-nondirectory shell) "csh")))
 320     (call-process shell nil t t
 321                   (if (and csh use-csh-option-f) "-cf" "-c")
 322                   (concat "exec " command))))
 323 \f
 324 (defun use-syntax-table (name)
 325   (set-syntax-table (symbol-value (intern (concat name "-syntax-table")))))
 326
 327 (defun line-to-top-of-window ()
 328   (recenter (1- (ml-prefix-argument))))
 329
 330 (defun ml-previous-page (&optional arg)
 331   (let ((count (or arg (ml-prefix-argument))))
 332     (while (> count 0)
 333       (scroll-down nil)
 334       (setq count (1- count)))
 335     (while (< count 0)
 336       (scroll-up nil)
 337       (setq count (1+ count)))))
 338
 339 (defun ml-next-page ()
 340   (previous-page (- (ml-prefix-argument))))
 341
 342 (defun page-next-window (&optional arg)
 343   (let ((count (or arg (ml-prefix-argument))))
 344     (while (> count 0)
 345       (scroll-other-window nil)
 346       (setq count (1- count)))
 347     (while (< count 0)
 348       (scroll-other-window '-)
 349       (setq count (1+ count)))))
 350
 351 (defun ml-next-window ()
 352   (select-window (next-window)))
 353
 354 (defun ml-previous-window ()
 355   (select-window (previous-window)))
 356
 357 (defun scroll-one-line-up ()
 358   (scroll-up (ml-prefix-argument)))
 359
 360 (defun scroll-one-line-down ()
 361   (scroll-down (ml-prefix-argument)))
 362
 363 (defun split-current-window ()
 364   (split-window (selected-window)))
 365
 366 (defun last-key-struck () last-command-char)
 367
 368 (defun execute-mlisp-line (string)
 369   (eval (read string)))
 370
 371 (defun move-dot-to-x-y (x y)
 372   (goto-char (window-start (selected-window)))
 373   (vertical-motion (1- y))
 374   (move-to-column (1- x)))
 375
 376 (defun ml-modify-syntax-entry (string)
 377   (let ((i 5)
 378         (len (length string))
 379         (datastring (substring string 0 2)))
 380     (if (= (aref string 0) ?\-)
 381         (aset datastring 0 ?\ ))
 382     (if (= (aref string 2) ?\{)
 383         (if (= (aref string 4) ?\ )
 384             (aset datastring 0 ?\<)
 385           (error "Two-char comment delimiter: use modify-syntax-entry directly")))
 386     (if (= (aref string 3) ?\})
 387         (if (= (aref string 4) ?\ )
 388             (aset datastring 0 ?\>)
 389           (error "Two-char comment delimiter: use modify-syntax-entry directly")))
 390     (while (< i len)
 391       (modify-syntax-entry (aref string i) datastring)
 392       (setq i (1+ i))
 393       (if (and (< i len)
 394                (= (aref string i) ?\-))
 395           (let ((c (aref string (1- i)))
 396                 (lim (aref string (1+ i))))
 397             (while (<= c lim)
 398               (modify-syntax-entry c datastring)
 399               (setq c (1+ c)))
 400             (setq i (+ 2 i)))))))
 401 \f
 402
 403
 404 (defun ml-substr (string from to)
 405   (let ((length (length string)))
 406     (if (< from 0) (setq from (+ from length)))
 407     (if (< to 0) (setq to (+ to length)))
 408     (substring string from (+ from to))))
 409
 410 (provide 'mlsupport)
 411
 412 ;;; mlsupport.el ends here