lisp/obsolete/mlsupport.el

   1 ;;; mlsupport.el --- run-time support for mocklisp code
   2
   3 ;; Copyright (C) 1985, 2001, 2002, 2003, 2004, 2005,
   4 ;;   2006, 2007, 2008 Free Software Foundation, Inc.
   5
   6 ;; Maintainer: FSF
   7 ;; Keywords: extensions
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 3, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  24 ;; Boston, MA 02110-1301, USA.
  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 package mlconvert.el translates Mocklisp code
  32 ;; to use these names.
  33
  34 ;;; Code:
  35
  36 (defmacro ml-defun (&rest defs)
  37   (list 'ml-defun-1 (list 'quote defs)))
  38
  39 (defun ml-defun-1 (args)
  40   (while args
  41     (fset (car (car args)) (cons 'mocklisp (cdr (car args))))
  42     (setq args (cdr args))))
  43
  44 (defmacro declare-buffer-specific (&rest vars)
  45   (cons 'progn (mapcar (function (lambda (var) (list 'make-variable-buffer-local (list 'quote var)))) vars)))
  46
  47 (defun ml-set-default (varname value)
  48   (set-default (intern varname) value))
  49
  50 ; Lossage: must make various things default missing args to the prefix arg
  51 ; Alternatively, must make provide-prefix-argument do something hairy.
  52
  53 (defun >> (val count) (lsh val (- count)))
  54 (defun novalue () nil)
  55
  56 (defun ml-not (arg) (if (zerop arg) 1 0))
  57
  58 (defun provide-prefix-arg (arg form)
  59   (funcall (car form) arg))
  60
  61 (defun define-keymap (name)
  62   (fset (intern name) (make-keymap)))
  63
  64 ;; Make it work to use ml-use-...-map on "esc" and such.
  65 (fset 'esc-map esc-map)
  66 (fset 'ctl-x-map ctl-x-map)
  67
  68 (defun ml-use-local-map (name)
  69   (use-local-map (intern (concat name "-map"))))
  70
  71 (defun ml-use-global-map (name)
  72   (use-global-map (intern (concat name "-map"))))
  73
  74 (defun local-bind-to-key (name key)
  75   (or (current-local-map)
  76       (use-local-map (make-keymap)))
  77   (define-key (current-local-map)
  78     (if (integerp key)
  79         (if (>= key 128)
  80             (concat (char-to-string meta-prefix-char)
  81                     (char-to-string (- key 128)))
  82           (char-to-string key))
  83       key)
  84     (intern name)))
  85
  86 (defun bind-to-key (name key)
  87   (define-key global-map (if (integerp key) (char-to-string key) key)
  88     (intern name)))
  89
  90 (defun ml-autoload (name file)
  91   (autoload (intern name) file))
  92
  93 (defun ml-define-string-macro (name defn)
  94   (fset (intern name) defn))
  95
  96 (defun push-back-character (char)
  97   (setq unread-command-events (list char)))
  98
  99 (defun to-col (column)
 100   (indent-to column 0))
 101
 102 (defmacro is-bound (&rest syms)
 103   (cons 'and (mapcar (function (lambda (sym) (list 'boundp (list 'quote sym)))) syms)))
 104
 105 (defmacro declare-global (&rest syms)
 106   (cons 'progn (mapcar (function (lambda (sym) (list 'defvar sym nil))) syms)))
 107
 108 (defmacro error-occurred (&rest body)
 109   (list 'condition-case nil (cons 'progn (append body '(nil))) '(error t)))
 110
 111 (defun return-prefix-argument (value)
 112   (setq prefix-arg value))
 113
 114 (defun ml-prefix-argument ()
 115   (if (null current-prefix-arg) 1
 116     (if (listp current-prefix-arg) (car current-prefix-arg)
 117       (if (eq current-prefix-arg '-) -1
 118         current-prefix-arg))))
 119
 120 (defun ml-print (varname)
 121   (interactive "vPrint variable: ")
 122   (if (boundp varname)
 123     (message "%s => %s" (symbol-name varname) (symbol-value varname))
 124     (message "%s has no value" (symbol-name varname))))
 125
 126 (defun ml-set (str val) (set (intern str) val))
 127
 128 (defun ml-message (&rest args) (message "%s" (apply 'concat args)))
 129
 130 (defun set-auto-fill-hook (arg)
 131   (setq auto-fill-function (intern arg)))
 132
 133 (defun auto-execute (function pattern)
 134   (if (/= (aref pattern 0) ?*)
 135       (error "Only patterns starting with * supported in auto-execute"))
 136   (setq auto-mode-alist (cons (cons (concat "\\." (substring pattern 1)
 137                                             "\\'")
 138                                     function)
 139                               auto-mode-alist)))
 140
 141 (defun move-to-comment-column ()
 142   (indent-to comment-column))
 143
 144 (defun erase-region ()
 145   (delete-region (point) (mark)))
 146
 147 (defun delete-region-to-buffer (bufname)
 148   (copy-to-buffer bufname (point) (mark))
 149   (delete-region (point) (mark)))
 150
 151 (defun copy-region-to-buffer (bufname)
 152   (copy-to-buffer bufname (point) (mark)))
 153
 154 (defun append-region-to-buffer (bufname)
 155   (append-to-buffer bufname (point) (mark)))
 156
 157 (defun prepend-region-to-buffer (bufname)
 158   (prepend-to-buffer bufname (point) (mark)))
 159
 160 (defun delete-next-character ()
 161   (delete-char (ml-prefix-argument)))
 162
 163 (defun delete-next-word ()
 164   (delete-region (point) (progn (forward-word (ml-prefix-argument)) (point))))
 165
 166 (defun delete-previous-word ()
 167   (delete-region (point) (progn (backward-word (ml-prefix-argument)) (point))))
 168
 169 (defun delete-previous-character ()
 170   (delete-backward-char (ml-prefix-argument)))
 171
 172 (defun forward-character ()
 173   (forward-char (ml-prefix-argument)))
 174
 175 (defun backward-character ()
 176   (backward-char (ml-prefix-argument)))
 177
 178 (defun ml-newline ()
 179   (newline (ml-prefix-argument)))
 180
 181 (defun ml-next-line ()
 182   (forward-line (ml-prefix-argument)))
 183
 184 (defun ml-previous-line ()
 185   (forward-line (- (ml-prefix-argument))))
 186
 187 (defun delete-to-kill-buffer ()
 188   (kill-region (point) (mark)))
 189
 190 (defun narrow-region ()
 191   (narrow-to-region (point) (mark)))
 192
 193 (defun ml-newline-and-indent ()
 194   (let ((column (current-indentation)))
 195     (newline (ml-prefix-argument))
 196     (indent-to column)))
 197
 198 (defun newline-and-backup ()
 199   (open-line (ml-prefix-argument)))
 200
 201 (defun quote-char ()
 202   (quoted-insert (ml-prefix-argument)))
 203
 204 (defun ml-current-column ()
 205   (1+ (current-column)))
 206
 207 (defun ml-current-indent ()
 208   (1+ (current-indentation)))
 209
 210 (defun region-around-match (&optional n)
 211   (set-mark (match-beginning n))
 212   (goto-char (match-end n)))
 213
 214 (defun region-to-string ()
 215   (buffer-substring (min (point) (mark)) (max (point) (mark))))
 216
 217 (defun use-abbrev-table (name)
 218   (let ((symbol (intern (concat name "-abbrev-table"))))
 219     (or (boundp symbol)
 220         (define-abbrev-table symbol nil))
 221     (symbol-value symbol)))
 222
 223 (defun define-hooked-local-abbrev (name exp hook)
 224   (define-abbrev local-abbrev-table name exp (intern hook)))
 225
 226 (defun define-hooked-global-abbrev (name exp hook)
 227   (define-abbrev global-abbrev-table name exp (intern hook)))
 228
 229 (defun case-word-lower ()
 230   (ml-casify-word 'downcase-region))
 231
 232 (defun case-word-upper ()
 233   (ml-casify-word 'upcase-region))
 234
 235 (defun case-word-capitalize ()
 236   (ml-casify-word 'capitalize-region))
 237
 238 (defun ml-casify-word (fun)
 239   (save-excursion
 240    (forward-char 1)
 241    (forward-word -1)
 242    (funcall fun (point)
 243             (progn (forward-word (ml-prefix-argument))
 244                    (point)))))
 245
 246 (defun case-region-lower ()
 247   (downcase-region (point) (mark)))
 248
 249 (defun case-region-upper ()
 250   (upcase-region (point) (mark)))
 251
 252 (defun case-region-capitalize ()
 253   (capitalize-region (point) (mark)))
 254 \f
 255 (defvar saved-command-line-args nil)
 256
 257 (defun argc ()
 258   (or saved-command-line-args
 259       (setq saved-command-line-args command-line-args
 260             command-line-args ()))
 261   (length command-line-args))
 262
 263 (defun argv (i)
 264   (or saved-command-line-args
 265       (setq saved-command-line-args command-line-args
 266             command-line-args ()))
 267   (nth i saved-command-line-args))
 268
 269 (defun invisible-argc ()
 270   (length (or saved-command-line-args
 271               command-line-args)))
 272
 273 (defun invisible-argv (i)
 274   (nth i (or saved-command-line-args
 275              command-line-args)))
 276
 277 (defun exit-emacs ()
 278   (interactive)
 279   (condition-case ()
 280       (exit-recursive-edit)
 281     (error (kill-emacs))))
 282 \f
 283 ;; Lisp function buffer-size returns total including invisible;
 284 ;; mocklisp wants just visible.
 285 (defun ml-buffer-size ()
 286   (- (point-max) (point-min)))
 287
 288 (defun previous-command ()
 289   last-command)
 290
 291 (defun beginning-of-window ()
 292   (goto-char (window-start)))
 293
 294 (defun end-of-window ()
 295   (goto-char (window-start))
 296   (vertical-motion (- (window-height) 2)))
 297 \f
 298 (defun ml-search-forward (string)
 299   (search-forward string nil nil (ml-prefix-argument)))
 300
 301 (defun ml-re-search-forward (string)
 302   (re-search-forward string nil nil (ml-prefix-argument)))
 303
 304 (defun ml-search-backward (string)
 305   (search-backward string nil nil (ml-prefix-argument)))
 306
 307 (defun ml-re-search-backward (string)
 308   (re-search-backward string nil nil (ml-prefix-argument)))
 309
 310 (defvar use-users-shell 1
 311   "Mocklisp compatibility variable; 1 means use shell from SHELL env var.
 312 0 means use /bin/sh.")
 313
 314 (defvar use-csh-option-f 1
 315   "Mocklisp compatibility variable; 1 means pass -f when calling csh.")
 316
 317 (defun filter-region (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-region (point) (mark) shell t t nil
 321                          (if (and csh use-csh-option-f) "-cf" "-c")
 322                          (concat "exec " command))))
 323
 324 (defun execute-monitor-command (command)
 325   (let* ((shell (if (/= use-users-shell 0) shell-file-name "/bin/sh"))
 326          (csh (equal (file-name-nondirectory shell) "csh")))
 327     (call-process shell nil t t
 328                   (if (and csh use-csh-option-f) "-cf" "-c")
 329                   (concat "exec " command))))
 330 \f
 331 (defun use-syntax-table (name)
 332   (set-syntax-table (symbol-value (intern (concat name "-syntax-table")))))
 333
 334 (defun line-to-top-of-window ()
 335   (recenter (1- (ml-prefix-argument))))
 336
 337 (defun ml-previous-page (&optional arg)
 338   (let ((count (or arg (ml-prefix-argument))))
 339     (while (> count 0)
 340       (scroll-down nil)
 341       (setq count (1- count)))
 342     (while (< count 0)
 343       (scroll-up nil)
 344       (setq count (1+ count)))))
 345
 346 (defun ml-next-page ()
 347   (ml-previous-page (- (ml-prefix-argument))))
 348
 349 (defun page-next-window (&optional arg)
 350   (let ((count (or arg (ml-prefix-argument))))
 351     (while (> count 0)
 352       (scroll-other-window nil)
 353       (setq count (1- count)))
 354     (while (< count 0)
 355       (scroll-other-window '-)
 356       (setq count (1+ count)))))
 357
 358 (defun ml-next-window ()
 359   (select-window (next-window)))
 360
 361 (defun ml-previous-window ()
 362   (select-window (previous-window)))
 363
 364 (defun scroll-one-line-up ()
 365   (scroll-up (ml-prefix-argument)))
 366
 367 (defun scroll-one-line-down ()
 368   (scroll-down (ml-prefix-argument)))
 369
 370 (defun split-current-window ()
 371   (split-window (selected-window)))
 372
 373 (defun last-key-struck () last-command-char)
 374
 375 (defun execute-mlisp-line (string)
 376   (eval (read string)))
 377
 378 (defun move-dot-to-x-y (x y)
 379   (goto-char (window-start (selected-window)))
 380   (vertical-motion (1- y))
 381   (move-to-column (1- x)))
 382
 383 (defun ml-modify-syntax-entry (string)
 384   (let ((i 5)
 385         (len (length string))
 386         (datastring (substring string 0 2)))
 387     (if (= (aref string 0) ?\-)
 388         (aset datastring 0 ?\ ))
 389     (if (= (aref string 2) ?\{)
 390         (if (= (aref string 4) ?\ )
 391             (aset datastring 0 ?\<)
 392           (error "Two-char comment delimiter: use modify-syntax-entry directly")))
 393     (if (= (aref string 3) ?\})
 394         (if (= (aref string 4) ?\ )
 395             (aset datastring 0 ?\>)
 396           (error "Two-char comment delimiter: use modify-syntax-entry directly")))
 397     (while (< i len)
 398       (modify-syntax-entry (aref string i) datastring)
 399       (setq i (1+ i))
 400       (if (and (< i len)
 401                (= (aref string i) ?\-))
 402           (let ((c (aref string (1- i)))
 403                 (lim (aref string (1+ i))))
 404             (while (<= c lim)
 405               (modify-syntax-entry c datastring)
 406               (setq c (1+ c)))
 407             (setq i (+ 2 i)))))))
 408 \f
 409
 410
 411 (defun ml-substr (string from to)
 412   (let ((length (length string)))
 413     (if (< from 0) (setq from (+ from length)))
 414     (if (< to 0) (setq to (+ to length)))
 415     (substring string from (+ from to))))
 416
 417 (defun ml-concat (&rest args)
 418   (let ((newargs nil) this)
 419     (while args
 420       (setq this (car args))
 421       (if (numberp this)
 422           (setq this (number-to-string this)))
 423       (setq newargs (cons this newargs)
 424             args (cdr args)))
 425     (apply 'concat (nreverse newargs))))
 426
 427 (provide 'mlsupport)
 428
 429 ;; arch-tag: b0ad09bc-8cb2-4be0-8888-2e874839bcbc
 430 ;;; mlsupport.el ends here