lisp/emulation/crisp.el

   1 ;;; crisp.el --- CRiSP/Brief Emacs emulator
   2
   3 ;; Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
   4
   5 ;; Author: Gary D. Foster <Gary.Foster@Corp.Sun.COM>
   6 ;; Keywords: emulations brief crisp
   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 the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Commentary:
  26
  27 ;; Keybindings and minor functions to duplicate the functionality and
  28 ;; finger-feel of the CRiSP/Brief editor.  This package is designed to
  29 ;; facilitate transitioning from Brief to (XE|E)macs with a minimum
  30 ;; amount of hassles.
  31
  32 ;; Enable this package by putting (require 'crisp) in your .emacs and
  33 ;; use M-x crisp-mode to toggle it on or off.
  34
  35 ;; This package will automatically load the scroll-all.el package if
  36 ;; you put (setq crisp-load-scroll-all t) in your .emacs before
  37 ;; loading this package.  If this feature is enabled, it will bind
  38 ;; meta-f1 to the scroll-all mode toggle.  The scroll-all package
  39 ;; duplicates the scroll-alling feature in CRiSP.
  40
  41 ;; Also, the default keybindings for brief/CRiSP override the M-x
  42 ;; key to exit the editor.  If you don't like this functionality, you
  43 ;; can prevent this behavior (or redefine it dynamically) by setting
  44 ;; the value of `crisp-override-meta-x' either in your .emacs or
  45 ;; interactively.  The default setting is t, which means that M-x will
  46 ;; by default run `save-buffers-kill-emacs' instead of the command
  47 ;; `execute-extended-command'.
  48
  49 ;; Finally, if you want to change the string displayed in the modeline
  50 ;; when this mode is in effect, override the definition of
  51 ;; `crisp-mode-modeline-string' in your .emacs.  The default value is
  52 ;; " *Crisp*" which may be a bit lengthy if you have a lot of things
  53 ;; being displayed there.
  54
  55 ;; All these overrides should go *before* the (require 'crisp) statement.
  56
  57 ;;; Code:
  58
  59 ;; local variables
  60
  61 (defgroup crisp nil
  62   "Emulator for CRiSP and Brief key bindings."
  63   :prefix "crisp-"
  64   :group 'emulations)
  65
  66 (defvar crisp-mode-map (let ((map (make-sparse-keymap)))
  67                          map)
  68   "Local keymap for CRiSP emulation mode.
  69 All the bindings are done here instead of globally to try and be
  70 nice to the world.")
  71
  72 (defcustom crisp-mode-modeline-string " *CRiSP*"
  73   "*String to display in the modeline when CRiSP emulation mode is enabled."
  74   :type 'string
  75   :group 'crisp)
  76
  77 ;;;###autoload
  78 (defcustom crisp-mode nil
  79   "Track status of CRiSP emulation mode.
  80 A value of nil means CRiSP mode is not enabled.  A value of t
  81 indicates CRiSP mode is enabled.
  82
  83 Setting this variable directly does not take effect;
  84 use either M-x customize or the function `crisp-mode'."
  85   :set (lambda (symbol value) (crisp-mode (if value 1 0)))
  86   :initialize 'custom-initialize-default
  87   :require 'crisp
  88   :version "20.4"
  89   :type 'boolean
  90   :group 'crisp)
  91
  92 (defcustom crisp-override-meta-x t
  93   "*Controls overriding the normal Emacs M-x key binding in the CRiSP emulator.
  94 Normally the CRiSP emulator rebinds M-x to `save-buffers-exit-emacs', and
  95 provides the usual M-x functionality on the F10 key.  If this variable
  96 is non-nil, M-x will exit Emacs."
  97   :type 'boolean
  98   :group 'crisp)
  99
 100 (defcustom crisp-load-scroll-all nil
 101   "Controls loading of the Scroll Lock in the CRiSP emulator.
 102 Its default behavior is to load and enable the Scroll Lock minor mode
 103 package when enabling the CRiSP emulator.
 104
 105 If this variable is nil when you start the CRiSP emulator, it
 106 does not load the scroll-all package."
 107   :type 'boolean
 108   :group 'crisp)
 109
 110 (defcustom crisp-load-hook nil
 111   "Hooks to run after loading the CRiSP emulator package."
 112   :type 'hook
 113   :group 'crisp)
 114
 115 (defcustom crisp-mode-hook nil
 116   "Hook run by the function `crisp-mode'."
 117   :type 'hook
 118   :group 'crisp)
 119
 120 (defconst crisp-version "1.34"
 121   "The version of the CRiSP emulator.")
 122
 123 (defconst crisp-mode-help-address "gfoster@suzieq.ml.org"
 124   "The email address of the CRiSP mode author/maintainer.")
 125
 126 ;; Silence the byte-compiler.
 127 (defvar crisp-last-last-command nil
 128   "The previous value of `last-command'.")
 129
 130 ;; The cut and paste routines are different between XEmacs and Emacs
 131 ;; so we need to set up aliases for the functions.
 132
 133 (defalias 'crisp-set-clipboard
 134   (if (fboundp 'clipboard-kill-ring-save)
 135       'clipboard-kill-ring-save
 136     'copy-primary-selection))
 137
 138 (defalias 'crisp-kill-region
 139   (if (fboundp 'clipboard-kill-region)
 140       'clipboard-kill-region
 141     'kill-primary-selection))
 142
 143 (defalias 'crisp-yank-clipboard
 144   (if (fboundp 'clipboard-yank)
 145       'clipboard-yank
 146     'yank-clipboard-selection))
 147
 148 (defun crisp-region-active ()
 149   "Compatibility function to test for an active region."
 150   (if (boundp 'zmacs-region-active-p)
 151       zmacs-region-active-p
 152     mark-active))
 153
 154 ;; and now the keymap defines
 155
 156 (define-key crisp-mode-map [(f1)]           'other-window)
 157
 158 (define-key crisp-mode-map [(f2) (down)]    'enlarge-window)
 159 (define-key crisp-mode-map [(f2) (left)]    'shrink-window-horizontally)
 160 (define-key crisp-mode-map [(f2) (right)]   'enlarge-window-horizontally)
 161 (define-key crisp-mode-map [(f2) (up)]      'shrink-window)
 162 (define-key crisp-mode-map [(f3) (down)]    'split-window-vertically)
 163 (define-key crisp-mode-map [(f3) (right)]   'split-window-horizontally)
 164
 165 (define-key crisp-mode-map [(f4)]           'delete-window)
 166 (define-key crisp-mode-map [(control f4)]   'delete-other-windows)
 167
 168 (define-key crisp-mode-map [(f5)]           'search-forward-regexp)
 169 (define-key crisp-mode-map [(f19)]          'search-forward-regexp)
 170 (define-key crisp-mode-map [(meta f5)]      'search-backward-regexp)
 171
 172 (define-key crisp-mode-map [(f6)]           'query-replace)
 173
 174 (define-key crisp-mode-map [(f7)]           'start-kbd-macro)
 175 (define-key crisp-mode-map [(meta f7)]      'end-kbd-macro)
 176
 177 (define-key crisp-mode-map [(f8)]           'call-last-kbd-macro)
 178 (define-key crisp-mode-map [(meta f8)]      'save-kbd-macro)
 179
 180 (define-key crisp-mode-map [(f9)]           'find-file)
 181 (define-key crisp-mode-map [(meta f9)]      'load-library)
 182
 183 (define-key crisp-mode-map [(f10)]          'execute-extended-command)
 184 (define-key crisp-mode-map [(meta f10)]     'compile)
 185
 186 (define-key crisp-mode-map [(SunF37)]       'kill-buffer)
 187 (define-key crisp-mode-map [(kp-add)]       'crisp-copy-line)
 188 (define-key crisp-mode-map [(kp-subtract)]  'crisp-kill-line)
 189 ;; just to cover all the bases (GNU Emacs, for instance)
 190 (define-key crisp-mode-map [(f24)]          'crisp-kill-line)
 191 (define-key crisp-mode-map [(insert)]       'crisp-yank-clipboard)
 192 (define-key crisp-mode-map [(f16)]          'crisp-set-clipboard) ; copy on Sun5 kbd
 193 (define-key crisp-mode-map [(f20)]          'crisp-kill-region) ; cut on Sun5 kbd
 194 (define-key crisp-mode-map [(f18)]          'crisp-yank-clipboard) ; paste on Sun5 kbd
 195
 196 (define-key crisp-mode-map [(control f)]    'fill-paragraph-or-region)
 197 (define-key crisp-mode-map [(meta d)]       (lambda ()
 198                                               (interactive)
 199                                               (beginning-of-line) (kill-line)))
 200 (define-key crisp-mode-map [(meta e)]       'find-file)
 201 (define-key crisp-mode-map [(meta g)]       'goto-line)
 202 (define-key crisp-mode-map [(meta h)]       'help)
 203 (define-key crisp-mode-map [(meta i)]       'overwrite-mode)
 204 (define-key crisp-mode-map [(meta j)]       'bookmark-jump)
 205 (define-key crisp-mode-map [(meta l)]       'crisp-mark-line)
 206 (define-key crisp-mode-map [(meta m)]       'set-mark-command)
 207 (define-key crisp-mode-map [(meta n)]       'bury-buffer)
 208 (define-key crisp-mode-map [(meta p)]       'crisp-unbury-buffer)
 209 (define-key crisp-mode-map [(meta u)]       'advertised-undo)
 210 (define-key crisp-mode-map [(f14)]          'advertised-undo)
 211 (define-key crisp-mode-map [(meta w)]       'save-buffer)
 212 (define-key crisp-mode-map [(meta x)]       'crisp-meta-x-wrapper)
 213 (define-key crisp-mode-map [(meta ?0)]      (lambda ()
 214                                               (interactive)
 215                                               (bookmark-set "0")))
 216 (define-key crisp-mode-map [(meta ?1)]      (lambda ()
 217                                               (interactive)
 218                                               (bookmark-set "1")))
 219 (define-key crisp-mode-map [(meta ?2)]      (lambda ()
 220                                               (interactive)
 221                                               (bookmark-set "2")))
 222 (define-key crisp-mode-map [(meta ?3)]      (lambda ()
 223                                               (interactive)
 224                                               (bookmark-set "3")))
 225 (define-key crisp-mode-map [(meta ?4)]      (lambda ()
 226                                               (interactive)
 227                                               (bookmark-set "4")))
 228 (define-key crisp-mode-map [(meta ?5)]      (lambda ()
 229                                               (interactive)
 230                                               (bookmark-set "5")))
 231 (define-key crisp-mode-map [(meta ?6)]      (lambda ()
 232                                               (interactive)
 233                                               (bookmark-set "6")))
 234 (define-key crisp-mode-map [(meta ?7)]      (lambda ()
 235                                               (interactive)
 236                                               (bookmark-set "7")))
 237 (define-key crisp-mode-map [(meta ?8)]      (lambda ()
 238                                               (interactive)
 239                                               (bookmark-set "8")))
 240 (define-key crisp-mode-map [(meta ?9)]      (lambda ()
 241                                               (interactive)
 242                                               (bookmark-set "9")))
 243
 244 (define-key crisp-mode-map [(shift delete)]    'kill-word)
 245 (define-key crisp-mode-map [(shift backspace)] 'backward-kill-word)
 246 (define-key crisp-mode-map [(control left)]    'backward-word)
 247 (define-key crisp-mode-map [(control right)]   'forward-word)
 248
 249 (define-key crisp-mode-map [(home)]            'crisp-home)
 250 (define-key crisp-mode-map [(control home)]    (lambda ()
 251                                                  (interactive)
 252                                                  (move-to-window-line 0)))
 253 (define-key crisp-mode-map [(meta home)]       'beginning-of-line)
 254 (define-key crisp-mode-map [(end)]             'crisp-end)
 255 (define-key crisp-mode-map [(control end)]     (lambda ()
 256                                                  (interactive)
 257                                                  (move-to-window-line -1)))
 258 (define-key crisp-mode-map [(meta end)]        'end-of-line)
 259
 260 (defun crisp-version (&optional arg)
 261   "Version number of the CRiSP emulator package.
 262 If ARG, insert results at point."
 263   (interactive "P")
 264   (let ((foo (concat "CRiSP version " crisp-version)))
 265     (if arg
 266         (insert (message foo))
 267       (message foo))))
 268
 269 (defun crisp-mark-line (arg)
 270   "Set mark at the end of the line.
 271 Arg works as in `end-of-line'."
 272   (interactive "p")
 273   (let (newmark)
 274     (save-excursion
 275       (end-of-line arg)
 276       (setq newmark (point)))
 277     (push-mark newmark nil t)))
 278
 279 (defun crisp-kill-line (arg)
 280   "Mark and kill line(s).
 281 Marks from point to end of the current line (honoring prefix arguments),
 282 copies the region to the kill ring and clipboard, and then deletes it."
 283   (interactive "*p")
 284   (if (crisp-region-active)
 285       (call-interactively 'crisp-kill-region)
 286     (crisp-mark-line arg)
 287     (call-interactively 'crisp-kill-region)))
 288
 289 (defun crisp-copy-line (arg)
 290   "Mark and copy line(s).
 291 Marks from point to end of the current line (honoring prefix arguments),
 292 copies the region to the kill ring and clipboard, and then deactivates
 293 the region."
 294   (interactive "*p")
 295     (if (crisp-region-active)
 296         (call-interactively 'crisp-set-clipboard)
 297       (crisp-mark-line arg)
 298       (call-interactively 'crisp-set-clipboard))
 299     ;; clear the region after the operation is complete
 300     ;; XEmacs does this automagically, Emacs doesn't.
 301     (if (boundp 'mark-active)
 302         (setq mark-active nil)))
 303
 304 (defun crisp-home ()
 305   "\"Home\" the point, the way CRiSP would do it.
 306 The first use moves point to beginning of the line.  Second
 307 consecutive use moves point to beginning of the screen.  Third
 308 consecutive use moves point to the beginning of the buffer."
 309   (interactive nil)
 310   (cond
 311     ((and (eq last-command 'crisp-home)
 312           (eq crisp-last-last-command 'crisp-home))
 313      (goto-char (point-min)))
 314     ((eq last-command 'crisp-home)
 315      (move-to-window-line 0))
 316     (t
 317      (beginning-of-line)))
 318   (setq crisp-last-last-command last-command))
 319
 320 (defun crisp-end ()
 321   "\"End\" the point, the way CRiSP would do it.
 322 The first use moves point to end of the line.  Second
 323 consecutive use moves point to the end of the screen.  Third
 324 consecutive use moves point to the end of the buffer."
 325   (interactive nil)
 326   (cond
 327     ((and (eq last-command 'crisp-end)
 328           (eq crisp-last-last-command 'crisp-end))
 329      (goto-char (point-max)))
 330     ((eq last-command 'crisp-end)
 331      (move-to-window-line -1)
 332      (end-of-line))
 333     (t
 334      (end-of-line)))
 335   (setq crisp-last-last-command last-command))
 336
 337 (defun crisp-unbury-buffer ()
 338   "Go back one buffer."
 339   (interactive)
 340   (switch-to-buffer (car (last (buffer-list)))))
 341
 342 (defun crisp-meta-x-wrapper ()
 343   "Wrapper function to conditionally override the normal M-x bindings.
 344 When `crisp-override-meta-x' is non-nil, M-x will exit Emacs (the
 345 normal CRiSP binding) and when it is nil M-x will run
 346 `execute-extended-command' (the normal Emacs binding)."
 347   (interactive)
 348   (if crisp-override-meta-x
 349       (save-buffers-kill-emacs)
 350     (call-interactively 'execute-extended-command)))
 351
 352 ;;;###autoload
 353 (defun crisp-mode (&optional arg)
 354   "Toggle CRiSP/Brief emulation minor mode.
 355 With ARG, turn CRiSP mode on if ARG is positive, off otherwise."
 356   (interactive "P")
 357   (setq crisp-mode (if (null arg)
 358                        (not crisp-mode)
 359                      (> (prefix-numeric-value arg) 0)))
 360   (when crisp-mode
 361     ;; Force transient-mark-mode, so that the marking routines work as
 362     ;; expected.  If the user turns off transient mark mode, most
 363     ;; things will still work fine except the crisp-(copy|kill)
 364     ;; functions won't work quite as nicely when regions are marked
 365     ;; differently and could really confuse people.  Caveat emptor.
 366     (if (fboundp 'transient-mark-mode)
 367         (transient-mark-mode t))
 368     (if crisp-load-scroll-all
 369         (require 'scroll-all))
 370     (if (featurep 'scroll-all)
 371         (define-key crisp-mode-map [(meta f1)] 'scroll-all-mode))
 372     (run-hooks 'crisp-mode-hook)))
 373
 374 ;; People might use Apropos on `brief'.
 375 ;;;###autoload
 376 (defalias 'brief-mode 'crisp-mode)
 377
 378 (if (fboundp 'add-minor-mode)
 379     (add-minor-mode 'crisp-mode 'crisp-mode-modeline-string
 380                     crisp-mode-map nil 'crisp-mode)
 381   (or (assq 'crisp-mode minor-mode-alist)
 382       (setq minor-mode-alist
 383             (cons '(crisp-mode crisp-mode-modeline-string) minor-mode-alist)))
 384   (or (assq 'crisp-mode minor-mode-map-alist)
 385       (setq minor-mode-map-alist (cons (cons 'crisp-mode crisp-mode-map)
 386                                        minor-mode-map-alist))))
 387
 388 ;; Interaction with other packages.
 389 (eval-after-load 'cua
 390   '(progn
 391      (add-to-list 'cua--standard-movement-commands 'crisp-home)
 392      (add-to-list 'cua--standard-movement-commands 'crisp-end)))
 393
 394 (run-hooks 'crisp-load-hook)
 395 (provide 'crisp)
 396
 397 ;;; crisp.el ends here