lisp/emulation/mlsupport.el

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