*** empty log message ***
[emacs.git] / lisp / tmm.el
blobcd674ce4b8f4f928a74a151e0efaa4e6b329fa6c
1 ;;; tmm.el --- text mode access to menu-bar
3 ;; Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
5 ;; Author: Ilya Zakharevich <ilya@math.mps.ohio-state.edu>
6 ;; Maintainer: FSF
8 ;; This file is part of GNU Emacs.
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.
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.
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.
25 ;;; Commentary:
27 ;; To use this package add
29 ;; (autoload 'tmm-menubar 'tmm "Text mode substitute for menubar" t)
30 ;; (global-set-key [f10] 'tmm-menubar)
31 ;; to your .emacs file. You can also add your own access to different
32 ;; menus available in Window System Emacs modeling definition after
33 ;; tmm-menubar.
35 ;;; Code:
37 (require 'electric)
39 (defgroup tmm nil
40 "Text mode access to menu-bar."
41 :prefix "tmm-"
42 :group 'menu)
44 ;;; The following will be localized, added only to pacify the compiler.
45 (defvar tmm-short-cuts)
46 (defvar tmm-old-mb-map nil)
47 (defvar tmm-old-comp-map)
48 (defvar tmm-c-prompt)
49 (defvar tmm-km-list)
50 (defvar tmm-next-shortcut-digit)
51 (defvar tmm-table-undef)
53 ;;;###autoload (define-key global-map "\M-`" 'tmm-menubar)
54 ;;;###autoload (define-key global-map [f10] 'tmm-menubar)
55 ;;;###autoload (define-key global-map [menu-bar mouse-1] 'tmm-menubar-mouse)
57 ;;;###autoload
58 (defun tmm-menubar (&optional x-position)
59 "Text-mode emulation of looking and choosing from a menubar.
60 See the documentation for `tmm-prompt'.
61 X-POSITION, if non-nil, specifies a horizontal position within the menu bar;
62 we make that menu bar item (the one at that position) the default choice."
63 (interactive)
64 (run-hooks 'menu-bar-update-hook)
65 ;; Obey menu-bar-final-items; put those items last.
66 (let ((menu-bar (tmm-get-keybind [menu-bar]))
67 menu-bar-item)
68 (let ((list menu-bar-final-items))
69 (while list
70 (let ((item (car list)))
71 ;; ITEM is the name of an item that we want to put last.
72 ;; Find it in MENU-BAR and move it to the end.
73 (let ((this-one (assq item menu-bar)))
74 (setq menu-bar (append (delq this-one menu-bar)
75 (list this-one)))))
76 (setq list (cdr list))))
77 (if x-position
78 (let ((tail menu-bar)
79 this-one
80 (column 0))
81 (while (and tail (< column x-position))
82 (setq this-one (car tail))
83 (if (and (consp (car tail))
84 (consp (cdr (car tail)))
85 (stringp (nth 1 (car tail))))
86 (setq column (+ column
87 (length (nth 1 (car tail)))
88 1)))
89 (setq tail (cdr tail)))
90 (setq menu-bar-item (car this-one))))
91 (tmm-prompt menu-bar nil menu-bar-item)))
93 ;;;###autoload
94 (defun tmm-menubar-mouse (event)
95 "Text-mode emulation of looking and choosing from a menubar.
96 This command is used when you click the mouse in the menubar
97 on a console which has no window system but does have a mouse.
98 See the documentation for `tmm-prompt'."
99 (interactive "e")
100 (tmm-menubar (car (posn-x-y (event-start event)))))
102 (defcustom tmm-mid-prompt "==>"
103 "*String to insert between shortcut and menu item.
104 If nil, there will be no shortcuts. It should not consist only of spaces,
105 or else the correct item might not be found in the `*Completions*' buffer."
106 :type 'string
107 :group 'tmm)
109 (defvar tmm-mb-map nil
110 "A place to store minibuffer map.")
112 (defcustom tmm-completion-prompt
113 "Press PageUp Key to reach this buffer from the minibuffer.
114 Alternatively, you can use Up/Down keys (or your History keys) to change
115 the item in the minibuffer, and press RET when you are done, or press the
116 marked letters to pick up your choice. Type C-g or ESC ESC ESC to cancel.
118 "*Help text to insert on the top of the completion buffer.
119 To save space, you can set this to nil,
120 in which case the standard introduction text is deleted too."
121 :type '(choice string (const nil))
122 :group 'tmm)
124 (defcustom tmm-shortcut-style '(downcase upcase)
125 "*What letters to use as menu shortcuts.
126 Must be either one of the symbols `downcase' or `upcase',
127 or else a list of the two in the order you prefer."
128 :type '(choice (const downcase)
129 (const upcase)
130 (repeat (choice (const downcase) (const upcase))))
131 :group 'tmm)
133 (defcustom tmm-shortcut-words 2
134 "*How many successive words to try for shortcuts, nil means all.
135 If you use only one of `downcase' or `upcase' for `tmm-shortcut-style',
136 specify nil for this variable."
137 :type '(choice integer (const nil))
138 :group 'tmm)
140 ;;;###autoload
141 (defun tmm-prompt (menu &optional in-popup default-item)
142 "Text-mode emulation of calling the bindings in keymap.
143 Creates a text-mode menu of possible choices. You can access the elements
144 in the menu in two ways:
145 *) via history mechanism from minibuffer;
146 *) Or via completion-buffer that is automatically shown.
147 The last alternative is currently a hack, you cannot use mouse reliably.
149 MENU is like the MENU argument to `x-popup-menu': either a
150 keymap or an alist of alists.
151 DEFAULT-ITEM, if non-nil, specifies an initial default choice.
152 Its value should be an event that has a binding in MENU."
153 ;; If the optional argument IN-POPUP is t,
154 ;; then MENU is an alist of elements of the form (STRING . VALUE).
155 ;; That is used for recursive calls only.
156 (let ((gl-str "Menu bar") ;; The menu bar itself is not a menu keymap
157 ; so it doesn't have a name.
158 tmm-km-list out history history-len tmm-table-undef tmm-c-prompt
159 tmm-old-mb-map tmm-old-comp-map tmm-short-cuts
160 chosen-string choice
161 (not-menu (not (keymapp menu))))
162 (run-hooks 'activate-menubar-hook)
163 ;; Compute tmm-km-list from MENU.
164 ;; tmm-km-list is an alist of (STRING . MEANING).
165 ;; It has no other elements.
166 ;; The order of elements in tmm-km-list is the order of the menu bar.
167 (mapcar (function (lambda (elt)
168 (if (stringp elt)
169 (setq gl-str elt)
170 (and (listp elt) (tmm-get-keymap elt not-menu)))))
171 menu)
172 ;; Choose an element of tmm-km-list; put it in choice.
173 (if (and not-menu (= 1 (length tmm-km-list)))
174 ;; If this is the top-level of an x-popup-menu menu,
175 ;; and there is just one pane, choose that one silently.
176 ;; This way we only ask the user one question,
177 ;; for which element of that pane.
178 (setq choice (cdr (car tmm-km-list)))
179 (unless tmm-km-list
180 (error "Empty menu reached"))
181 (and tmm-km-list
182 (let ((index-of-default 0))
183 (if tmm-mid-prompt
184 (setq tmm-km-list (tmm-add-shortcuts tmm-km-list))
186 ;; Find the default item's index within the menu bar.
187 ;; We use this to decide the initial minibuffer contents
188 ;; and initial history position.
189 (if default-item
190 (let ((tail menu))
191 (while (and tail
192 (not (eq (car-safe (car tail)) default-item)))
193 ;; Be careful to count only the elements of MENU
194 ;; that actually constitute menu bar items.
195 (if (and (consp (car tail))
196 (or (stringp (car-safe (cdr (car tail))))
197 (eq (car-safe (cdr (car tail))) 'menu-item)))
198 (setq index-of-default (1+ index-of-default)))
199 (setq tail (cdr tail)))))
200 (setq history (reverse (mapcar 'car tmm-km-list)))
201 (setq history-len (length history))
202 (setq history (append history history history history))
203 (setq tmm-c-prompt (nth (- history-len 1 index-of-default) history))
204 (add-hook 'minibuffer-setup-hook 'tmm-add-prompt)
205 (save-excursion
206 (unwind-protect
207 (setq out
208 (completing-read
209 (concat gl-str " (up/down to change, PgUp to menu): ")
210 tmm-km-list nil t nil
211 (cons 'history (- (* 2 history-len) index-of-default))))
212 (save-excursion
213 (remove-hook 'minibuffer-setup-hook 'tmm-add-prompt)
214 (if (get-buffer "*Completions*")
215 (progn
216 (set-buffer "*Completions*")
217 (use-local-map tmm-old-comp-map)
218 (bury-buffer (current-buffer)))))
219 ))))
220 (setq choice (cdr (assoc out tmm-km-list)))
221 (and (null choice)
222 (> (length out) (length tmm-c-prompt))
223 (string= (substring out 0 (length tmm-c-prompt)) tmm-c-prompt)
224 (setq out (substring out (length tmm-c-prompt))
225 choice (cdr (assoc out tmm-km-list))))
226 (and (null choice) out
227 (setq out (try-completion out tmm-km-list)
228 choice (cdr (assoc out tmm-km-list)))))
229 ;; CHOICE is now (STRING . MEANING). Separate the two parts.
230 (setq chosen-string (car choice))
231 (setq choice (cdr choice))
232 (cond (in-popup
233 ;; We just did the inner level of a -popup menu.
234 choice)
235 ;; We just did the outer level. Do the inner level now.
236 (not-menu (tmm-prompt choice t))
237 ;; We just handled a menu keymap and found another keymap.
238 ((keymapp choice)
239 (if (symbolp choice)
240 (setq choice (indirect-function choice)))
241 (condition-case nil
242 (require 'mouse)
243 (error nil))
244 (condition-case nil
245 (x-popup-menu nil choice) ; Get the shortcuts
246 (error nil))
247 (tmm-prompt choice))
248 ;; We just handled a menu keymap and found a command.
249 (choice
250 (if chosen-string
251 (progn
252 (setq last-command-event chosen-string)
253 (call-interactively choice))
254 choice)))))
256 (defun tmm-add-shortcuts (list)
257 "Adds shortcuts to cars of elements of the list.
258 Takes a list of lists with a string as car, returns list with
259 shortcuts added to these cars.
260 Stores a list of all the shortcuts in the free variable `tmm-short-cuts'."
261 (let ((tmm-next-shortcut-digit ?0))
262 (mapcar 'tmm-add-one-shortcut (reverse list))))
264 (defsubst tmm-add-one-shortcut (elt)
265 ;; uses the free vars tmm-next-shortcut-digit and tmm-short-cuts
266 (let* ((str (car elt))
267 (paren (string-match "(" str))
268 (pos 0) (word 0) char)
269 (catch 'done ; ??? is this slow?
270 (while (and (or (not tmm-shortcut-words) ; no limit on words
271 (< word tmm-shortcut-words)) ; try n words
272 (setq pos (string-match "\\w+" str pos)) ; get next word
273 (not (and paren (> pos paren)))) ; don't go past "(binding.."
274 (if (or (= pos 0)
275 (/= (aref str (1- pos)) ?.)) ; avoid file extensions
276 (let ((shortcut-style
277 (if (listp tmm-shortcut-style) ; convert to list
278 tmm-shortcut-style
279 (list tmm-shortcut-style))))
280 (while shortcut-style ; try upcase and downcase variants
281 (setq char (funcall (car shortcut-style) (aref str pos)))
282 (if (not (memq char tmm-short-cuts)) (throw 'done char))
283 (setq shortcut-style (cdr shortcut-style)))))
284 (setq word (1+ word))
285 (setq pos (match-end 0)))
286 (while (<= tmm-next-shortcut-digit ?9) ; no letter shortcut, pick a digit
287 (setq char tmm-next-shortcut-digit)
288 (setq tmm-next-shortcut-digit (1+ tmm-next-shortcut-digit))
289 (if (not (memq char tmm-short-cuts)) (throw 'done char)))
290 (setq char nil))
291 (if char (setq tmm-short-cuts (cons char tmm-short-cuts)))
292 (cons (concat (if char (concat (char-to-string char) tmm-mid-prompt)
293 ;; keep them lined up in columns
294 (make-string (1+ (length tmm-mid-prompt)) ?\ ))
295 str)
296 (cdr elt))))
298 ;; This returns the old map.
299 (defun tmm-define-keys (minibuffer)
300 (let ((map (make-sparse-keymap)))
301 (suppress-keymap map t)
302 (mapcar
303 (function
304 (lambda (c)
305 (if (listp tmm-shortcut-style)
306 (define-key map (char-to-string c) 'tmm-shortcut)
307 ;; only one kind of letters are shortcuts, so map both upcase and
308 ;; downcase input to the same
309 (define-key map (char-to-string (downcase c)) 'tmm-shortcut)
310 (define-key map (char-to-string (upcase c)) 'tmm-shortcut))))
311 tmm-short-cuts)
312 (if minibuffer
313 (progn
314 (define-key map [pageup] 'tmm-goto-completions)
315 (define-key map [prior] 'tmm-goto-completions)
316 (define-key map "\ev" 'tmm-goto-completions)
317 (define-key map "\C-n" 'next-history-element)
318 (define-key map "\C-p" 'previous-history-element)))
319 (prog1 (current-local-map)
320 (use-local-map (append map (current-local-map))))))
322 (defun tmm-completion-delete-prompt ()
323 (set-buffer standard-output)
324 (goto-char 1)
325 (delete-region 1 (search-forward "Possible completions are:\n")))
327 (defun tmm-add-prompt ()
328 (remove-hook 'minibuffer-setup-hook 'tmm-add-prompt)
329 (make-local-hook 'minibuffer-exit-hook)
330 (add-hook 'minibuffer-exit-hook 'tmm-delete-map nil t)
331 (let ((win (selected-window)))
332 (setq tmm-old-mb-map (tmm-define-keys t))
333 ;; Get window and hide it for electric mode to get correct size
334 (save-window-excursion
335 (let ((completions
336 (mapcar 'car minibuffer-completion-table)))
337 (or tmm-completion-prompt
338 (add-hook 'completion-setup-hook
339 'tmm-completion-delete-prompt 'append))
340 (with-output-to-temp-buffer "*Completions*"
341 (display-completion-list completions))
342 (remove-hook 'completion-setup-hook 'tmm-completion-delete-prompt))
343 (if tmm-completion-prompt
344 (progn
345 (set-buffer "*Completions*")
346 (goto-char 1)
347 (insert tmm-completion-prompt)))
349 (save-selected-window
350 (other-window 1) ; Electric-pop-up-window does
351 ; not work in minibuffer
352 (Electric-pop-up-window "*Completions*")
353 (with-current-buffer "*Completions*"
354 (setq tmm-old-comp-map (tmm-define-keys nil))))
356 (insert tmm-c-prompt)))
358 (defun tmm-delete-map ()
359 (remove-hook 'minibuffer-exit-hook 'tmm-delete-map t)
360 (if tmm-old-mb-map
361 (use-local-map tmm-old-mb-map)))
363 (defun tmm-shortcut ()
364 "Choose the shortcut that the user typed."
365 (interactive)
366 (let ((c last-command-char) s)
367 (if (symbolp tmm-shortcut-style)
368 (setq c (funcall tmm-shortcut-style c)))
369 (if (memq c tmm-short-cuts)
370 (if (equal (buffer-name) "*Completions*")
371 (progn
372 (beginning-of-buffer)
373 (re-search-forward
374 (concat "\\(^\\|[ \t]\\)" (char-to-string c) tmm-mid-prompt))
375 (choose-completion))
376 ;; In minibuffer
377 (delete-region (minibuffer-prompt-end) (point-max))
378 (mapcar (lambda (elt)
379 (if (string=
380 (substring (car elt) 0
381 (min (1+ (length tmm-mid-prompt))
382 (length (car elt))))
383 (concat (char-to-string c) tmm-mid-prompt))
384 (setq s (car elt))))
385 tmm-km-list)
386 (insert s)
387 (exit-minibuffer)))))
389 (defun tmm-goto-completions ()
390 (interactive)
391 (let ((prompt-end (minibuffer-prompt-end)))
392 (setq tmm-c-prompt (buffer-substring prompt-end (point-max)))
393 (delete-region prompt-end (point-max)))
394 (switch-to-buffer-other-window "*Completions*")
395 (search-forward tmm-c-prompt)
396 (search-backward tmm-c-prompt))
398 (defun tmm-get-keymap (elt &optional in-x-menu)
399 "Prepends (DOCSTRING EVENT BINDING) to free variable `tmm-km-list'.
400 The values are deduced from the argument ELT, that should be an
401 element of keymap, an `x-popup-menu' argument, or an element of
402 `x-popup-menu' argument (when IN-X-MENU is not-nil).
403 This function adds the element only if it is not already present.
404 It uses the free variable `tmm-table-undef' to keep undefined keys."
405 (let (km str cache plist filter (event (car elt)))
406 (setq elt (cdr elt))
407 (if (eq elt 'undefined)
408 (setq tmm-table-undef (cons (cons event nil) tmm-table-undef))
409 (unless (assoc event tmm-table-undef)
410 (cond ((if (listp elt)
411 (or (keymapp elt) (eq (car elt) 'lambda))
412 (fboundp elt))
413 (setq km elt))
414 ((if (listp (cdr-safe elt))
415 (or (keymapp (cdr-safe elt))
416 (eq (car (cdr-safe elt)) 'lambda))
417 (fboundp (cdr-safe elt)))
418 (setq km (cdr elt))
419 (and (stringp (car elt)) (setq str (car elt))))
420 ((if (listp (cdr-safe (cdr-safe elt)))
421 (or (keymapp (cdr-safe (cdr-safe elt)))
422 (eq (car (cdr-safe (cdr-safe elt))) 'lambda))
423 (fboundp (cdr-safe (cdr-safe elt))))
424 (setq km (cdr (cdr elt)))
425 (and (stringp (car elt)) (setq str (car elt)))
426 (and str
427 (stringp (cdr (car (cdr elt)))) ; keyseq cache
428 (setq cache (cdr (car (cdr elt))))
429 cache (setq str (concat str cache))))
430 ((eq (car-safe elt) 'menu-item)
431 (setq plist (cdr-safe (cdr-safe (cdr-safe elt))))
432 (setq km (nth 2 elt))
433 (setq str (nth 1 elt))
434 (setq filter (plist-get plist :filter))
435 (if filter
436 (setq km (funcall filter km)))
437 (and str
438 (consp (nth 3 elt))
439 (stringp (cdr (nth 3 elt))) ; keyseq cache
440 (setq cache (cdr (nth 3 elt)))
441 cache
442 (setq str (concat str cache))))
443 ((if (listp (cdr-safe (cdr-safe (cdr-safe elt))))
444 (or (keymapp (cdr-safe (cdr-safe (cdr-safe elt))))
445 (eq (car (cdr-safe (cdr-safe (cdr-safe elt)))) 'lambda))
446 (fboundp (cdr-safe (cdr-safe (cdr-safe elt)))))
447 ; New style of easy-menu
448 (setq km (cdr (cdr (cdr elt))))
449 (and (stringp (car elt)) (setq str (car elt)))
450 (and str
451 (stringp (cdr (car (cdr (cdr elt))))) ; keyseq cache
452 (setq cache (cdr (car (cdr (cdr elt)))))
453 cache (setq str (concat str cache))))
454 ((stringp event) ; x-popup or x-popup element
455 (if (or in-x-menu (stringp (car-safe elt)))
456 (setq str event event nil km elt)
457 (setq str event event nil km (cons 'keymap elt))
458 ))))
459 (and km (stringp km) (setq str km))
460 ;; Verify that the command is enabled;
461 ;; if not, don't mention it.
462 (when (and km (symbolp km) (get km 'menu-enable))
463 (unless (eval (get km 'menu-enable))
464 (setq km nil)))
465 (and km str
466 (or (assoc str tmm-km-list)
467 (setq tmm-km-list
468 (cons (cons str (cons event km)) tmm-km-list)))
469 ))))
471 (defun tmm-get-keybind (keyseq)
472 "Return the current binding of KEYSEQ, merging prefix definitions.
473 If KEYSEQ is a prefix key that has local and global bindings,
474 we merge them into a single keymap which shows the proper order of the menu.
475 However, for the menu bar itself, the value does not take account
476 of `menu-bar-final-items'."
477 (let (allbind bind)
478 (setq bind (key-binding keyseq))
479 ;; If KEYSEQ is a prefix key, then BIND is either nil
480 ;; or a symbol defined as a keymap (which satisfies keymapp).
481 (if (keymapp bind)
482 (setq bind nil))
483 ;; If we have a non-keymap definition, return that.
484 (or bind
485 (progn
486 ;; Otherwise, it is a prefix, so make a list of the subcommands.
487 ;; Make a list of all the bindings in all the keymaps.
488 (setq allbind (mapcar 'cdr (minor-mode-key-binding keyseq)))
489 (setq allbind (cons (local-key-binding keyseq) allbind))
490 (setq allbind (cons (global-key-binding keyseq) allbind))
491 ;; Merge all the elements of ALLBIND into one keymap.
492 (mapcar (lambda (in)
493 (if (and (symbolp in) (keymapp in))
494 (setq in (symbol-function in)))
495 (and in (keymapp in)
496 (if (keymapp bind)
497 (setq bind (nconc bind (copy-sequence (cdr in))))
498 (setq bind (copy-sequence in)))))
499 allbind)
500 ;; Return that keymap.
501 bind))))
503 (add-hook 'calendar-load-hook (lambda () (require 'cal-menu)))
505 (provide 'tmm)
507 ;;; tmm.el ends here