summaryrefslogtreecommitdiff
path: root/lisp/cedet/semantic/fw.el
blob: 9545dba703c304204522de1a0c9524083a5a8252 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
;;; semantic/fw.el --- Framework for Semantic

;;; Copyright (C) 1999-2014 Free Software Foundation, Inc.

;; Author: Eric M. Ludlam <zappo@gnu.org>

;; This file is part of GNU Emacs.

;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:
;;
;; Semantic has several core features shared across it's lex/parse/util
;; stages.  This used to clutter semantic.el some.  These routines are all
;; simple things that are not parser specific, but aid in making
;; semantic flexible and compatible amongst different Emacs platforms.

;;; Code:
;;
(require 'mode-local)
(require 'eieio)
(load "semantic/loaddefs" nil 'nomessage)

;;; Compatibility
;;
(eval-and-compile
  (if (featurep 'xemacs)
      (progn
	(defalias 'semantic-buffer-local-value 'symbol-value-in-buffer)
	(defalias 'semantic-overlay-live-p
	  (lambda (o)
	    (and (extent-live-p o)
		 (not (extent-detached-p o))
		 (bufferp (extent-buffer o)))))
	(defalias 'semantic-make-overlay
	  (lambda (beg end &optional buffer &rest rest)
	    "Xemacs `make-extent', supporting the front/rear advance options."
	    (let ((ol (make-extent beg end buffer)))
	      (when rest
		(set-extent-property ol 'start-open (car rest))
		(setq rest (cdr rest)))
	      (when rest
		(set-extent-property ol 'end-open (car rest)))
	      ol)))
	(defalias 'semantic-overlay-put             'set-extent-property)
	(defalias 'semantic-overlay-get             'extent-property)
	(defalias 'semantic-overlay-properties      'extent-properties)
	(defalias 'semantic-overlay-move            'set-extent-endpoints)
	(defalias 'semantic-overlay-delete          'delete-extent)
	(defalias 'semantic-overlays-at
	  (lambda (pos)
	    (condition-case nil
		(extent-list nil pos pos)
	      (error nil))
	    ))
	(defalias 'semantic-overlays-in
	  (lambda (beg end) (extent-list nil beg end)))
	(defalias 'semantic-overlay-buffer          'extent-buffer)
	(defalias 'semantic-overlay-start           'extent-start-position)
	(defalias 'semantic-overlay-end             'extent-end-position)
	(defalias 'semantic-overlay-size            'extent-length)
	(defalias 'semantic-overlay-next-change     'next-extent-change)
	(defalias 'semantic-overlay-previous-change 'previous-extent-change)
	(defalias 'semantic-overlay-lists
	  (lambda () (list (extent-list))))
	(defalias 'semantic-overlay-p               'extentp)
	(defalias 'semantic-event-window        'event-window)
	(defun semantic-read-event ()
	  (let ((event (next-command-event)))
	    (if (key-press-event-p event)
		(let ((c (event-to-character event)))
		  (if (char-equal c (quit-char))
		      (keyboard-quit)
		    c)))
	    event))
	(defun semantic-popup-menu (menu)
	  "Blocking version of `popup-menu'"
	  (popup-menu menu)
	  ;; Wait...
	  (while (popup-up-p) (dispatch-event (next-event))))
	)
    ;; Emacs Bindings
    (defalias 'semantic-overlay-live-p          'overlay-buffer)
    (defalias 'semantic-make-overlay            'make-overlay)
    (defalias 'semantic-overlay-put             'overlay-put)
    (defalias 'semantic-overlay-get             'overlay-get)
    (defalias 'semantic-overlay-properties      'overlay-properties)
    (defalias 'semantic-overlay-move            'move-overlay)
    (defalias 'semantic-overlay-delete          'delete-overlay)
    (defalias 'semantic-overlays-at             'overlays-at)
    (defalias 'semantic-overlays-in             'overlays-in)
    (defalias 'semantic-overlay-buffer          'overlay-buffer)
    (defalias 'semantic-overlay-start           'overlay-start)
    (defalias 'semantic-overlay-end             'overlay-end)
    (defalias 'semantic-overlay-next-change     'next-overlay-change)
    (defalias 'semantic-overlay-previous-change 'previous-overlay-change)
    (defalias 'semantic-overlay-lists           'overlay-lists)
    (defalias 'semantic-overlay-p               'overlayp)
    (defalias 'semantic-read-event              'read-event)
    (defalias 'semantic-popup-menu              'popup-menu)
    (defun semantic-event-window (event)
      "Extract the window from EVENT."
      (car (car (cdr event))))

    (if (> emacs-major-version 21)
	(defalias 'semantic-buffer-local-value 'buffer-local-value)

      (defun semantic-buffer-local-value (sym &optional buf)
	"Get the value of SYM from buffer local variable in BUF."
	(cdr (assoc sym (buffer-local-variables buf)))))
    )


  (defalias 'semantic-make-local-hook
    (if (featurep 'emacs)
        #'identity  #'make-local-hook))

  (defalias 'semantic-mode-line-update
    (if (featurep 'xemacs) #'redraw-modeline #'force-mode-line-update))

  ;; Since Emacs 22 major mode functions should use `run-mode-hooks' to
  ;; run major mode hooks.
  (defalias 'semantic-run-mode-hooks
    (if (fboundp 'run-mode-hooks)
	'run-mode-hooks
      'run-hooks))

  ;; Fancy compat usage now handled in cedet-compat
  (defalias 'semantic-subst-char-in-string 'subst-char-in-string)
  )

(defun semantic-delete-overlay-maybe (overlay)
  "Delete OVERLAY if it is a semantic token overlay."
  (if (semantic-overlay-get overlay 'semantic)
      (semantic-overlay-delete overlay)))

;;; Menu Item compatibility
;;
(defun semantic-menu-item (item)
  "Build an XEmacs compatible menu item from vector ITEM.
That is remove the unsupported :help stuff."
  (if (featurep 'xemacs)
      (let ((n (length item))
            (i 0)
            slot l)
        (while (< i n)
          (setq slot (aref item i))
          (if (and (keywordp slot)
                   (eq slot :help))
              (setq i (1+ i))
            (setq l (cons slot l)))
          (setq i (1+ i)))
        (apply #'vector (nreverse l)))
    item))

;;; Positional Data Cache
;;
(defvar semantic-cache-data-overlays nil
  "List of all overlays waiting to be flushed.")

(defun semantic-cache-data-to-buffer (buffer start end value name &optional lifespan)
  "In BUFFER over the region START END, remember VALUE.
NAME specifies a special name that can be searched for later to
recover the cached data with `semantic-get-cache-data'.
LIFESPAN indicates how long the data cache will be remembered.
The default LIFESPAN is 'end-of-command.
Possible Lifespans are:
  'end-of-command - Remove the cache at the end of the currently
                    executing command.
  'exit-cache-zone - Remove when point leaves the overlay at the
                    end of the currently executing command."
  ;; Check if LIFESPAN is valid before to create any overlay
  (or lifespan (setq lifespan 'end-of-command))
  (or (memq lifespan '(end-of-command exit-cache-zone))
      (error "semantic-cache-data-to-buffer: Unknown LIFESPAN: %s"
             lifespan))
  (let ((o (semantic-make-overlay start end buffer)))
    (semantic-overlay-put o 'cache-name   name)
    (semantic-overlay-put o 'cached-value value)
    (semantic-overlay-put o 'lifespan     lifespan)
    (setq semantic-cache-data-overlays
          (cons o semantic-cache-data-overlays))
    ;;(message "Adding to cache: %s" o)
    (add-hook 'post-command-hook 'semantic-cache-data-post-command-hook)
    ))

(defun semantic-cache-data-post-command-hook ()
  "Flush `semantic-cache-data-overlays' based 'lifespan property.
Remove self from `post-command-hook' if it is empty."
  (let ((newcache nil)
        (oldcache semantic-cache-data-overlays))
    (while oldcache
      (let* ((o    (car oldcache))
             (life (semantic-overlay-get o 'lifespan))
             )
        (if (or (eq life 'end-of-command)
                (and (eq life 'exit-cache-zone)
                     (not (member o (semantic-overlays-at (point))))))
            (progn
              ;;(message "Removing from cache: %s" o)
              (semantic-overlay-delete o)
              )
          (setq newcache (cons o newcache))))
      (setq oldcache (cdr oldcache)))
    (setq semantic-cache-data-overlays (nreverse newcache)))

  ;; Remove ourselves if we have removed all overlays.
  (unless semantic-cache-data-overlays
    (remove-hook 'post-command-hook
                 'semantic-cache-data-post-command-hook)))

(defun semantic-get-cache-data (name &optional point)
  "Get cached data with NAME from optional POINT."
  (save-excursion
    (if point (goto-char point))
    (let ((o (semantic-overlays-at (point)))
          (ans nil))
      (while (and (not ans) o)
        (if (equal (semantic-overlay-get (car o) 'cache-name) name)
            (setq ans (car o))
          (setq o (cdr o))))
      (when ans
        (semantic-overlay-get ans 'cached-value)))))

(defun semantic-test-data-cache ()
  "Test the data cache."
  (interactive)
  (let ((data '(a b c)))
    (save-current-buffer
      (set-buffer (get-buffer-create " *semantic-test-data-cache*"))
      (save-excursion
	(erase-buffer)
	(insert "The Moose is Loose")
	(goto-char (point-min))
	(semantic-cache-data-to-buffer (current-buffer) (point) (+ (point) 5)
				       data 'moose 'exit-cache-zone)
	(if (equal (semantic-get-cache-data 'moose) data)
	    (message "Successfully retrieved cached data.")
	  (error "Failed to retrieve cached data"))
	))))

;;; Obsoleting various functions & variables
;;
(defun semantic-overload-symbol-from-function (name)
  "Return the symbol for overload used by NAME, the defined symbol."
  (let ((sym-name (symbol-name name)))
    (if (string-match "^semantic-" sym-name)
	(intern (substring sym-name (match-end 0)))
      name)))

(defun semantic-alias-obsolete (oldfnalias newfn when)
  "Make OLDFNALIAS an alias for NEWFN.
Mark OLDFNALIAS as obsolete, such that the byte compiler
will throw a warning when it encounters this symbol."
  (defalias oldfnalias newfn)
  (make-obsolete oldfnalias newfn when)
  (when (and (function-overload-p newfn)
             (not (overload-obsoleted-by newfn))
             ;; Only throw this warning when byte compiling things.
             (boundp 'byte-compile-current-file)
             byte-compile-current-file
	     (not (string-match "cedet" byte-compile-current-file))
	     )
    (make-obsolete-overload oldfnalias newfn when)
    (byte-compile-warn
     "%s: `%s' obsoletes overload `%s'"
     byte-compile-current-file
     newfn
     (semantic-overload-symbol-from-function oldfnalias))
    ))

(defun semantic-varalias-obsolete (oldvaralias newvar when)
  "Make OLDVARALIAS an alias for variable NEWVAR.
Mark OLDVARALIAS as obsolete, such that the byte compiler
will throw a warning when it encounters this symbol."
  (make-obsolete-variable oldvaralias newvar when)
  (condition-case nil
      (defvaralias oldvaralias newvar)
    (error
     ;; Only throw this warning when byte compiling things.
     (when (and (boundp 'byte-compile-current-file)
                byte-compile-current-file)
       (byte-compile-warn
        "variable `%s' obsoletes, but isn't alias of `%s'"
        newvar oldvaralias)
     ))))

;;; Help debugging
;;
(defmacro semantic-safe (format &rest body)
  "Turn into a FORMAT message any error caught during eval of BODY.
Return the value of last BODY form or nil if an error occurred.
FORMAT can have a %s escape which will be replaced with the actual
error message.
If `debug-on-error' is set, errors are not caught, so that you can
debug them.
Avoid using a large BODY since it is duplicated."
  ;;(declare (debug t) (indent 1))
  `(if debug-on-error
       ;;(let ((inhibit-quit nil)) ,@body)
       ;; Note to self: Doing the above screws up the wisent parser.
       (progn ,@body)
     (condition-case err
	 (progn ,@body)
       (error
        (message ,format (format "%S - %s" (current-buffer)
                                 (error-message-string err)))
        nil))))
(put 'semantic-safe 'lisp-indent-function 1)

;;; Misc utilities
;;

(defvar semantic-new-buffer-fcn-was-run nil
  "Non-nil after `semantic-new-buffer-fcn' has been executed.")
(make-variable-buffer-local 'semantic-new-buffer-fcn-was-run)

(defsubst semantic-active-p ()
  "Return non-nil if the current buffer was set up for parsing."
  semantic-new-buffer-fcn-was-run)

(defsubst semantic-map-buffers (function)
  "Run FUNCTION for each Semantic enabled buffer found.
FUNCTION does not have arguments.  When FUNCTION is entered
`current-buffer' is a selected Semantic enabled buffer."
  (mode-local-map-file-buffers function #'semantic-active-p))

(defalias 'semantic-map-mode-buffers 'mode-local-map-mode-buffers)

(semantic-alias-obsolete 'define-mode-overload-implementation
                         'define-mode-local-override "23.2")

(defun semantic-install-function-overrides (overrides &optional transient mode)
  "Install the function OVERRIDES in the specified environment.
OVERRIDES must be an alist ((OVERLOAD .  FUNCTION) ...) where OVERLOAD
is a symbol identifying an overloadable entry, and FUNCTION is the
function to override it with.
If optional argument TRANSIENT is non-nil, installed overrides can in
turn be overridden by next installation.
If optional argument MODE is non-nil, it must be a major mode symbol.
OVERRIDES will be installed globally for this major mode.  If MODE is
nil, OVERRIDES will be installed locally in the current buffer.  This
later installation should be done in MODE hook."
  (mode-local-bind
   ;; Add the semantic- prefix to OVERLOAD short names.
   (mapcar
    #'(lambda (e)
        (let ((name (symbol-name (car e))))
          (if (string-match "^semantic-" name)
              e
            (cons (intern (format "semantic-%s" name)) (cdr e)))))
    overrides)
   (list 'constant-flag (not transient)
         'override-flag t)
   mode))

;;; User Interrupt handling
;;
(defvar semantic-current-input-throw-symbol nil
  "The current throw symbol for `semantic-exit-on-input'.")
(defvar semantic--on-input-start-marker nil
  "The marker when starting a semantic-exit-on-input form.")

(defmacro semantic-exit-on-input (symbol &rest forms)
  "Using SYMBOL as an argument to `throw', execute FORMS.
If FORMS includes a call to `semantic-throw-on-input', then
if a user presses any key during execution, this form macro
will exit with the value passed to `semantic-throw-on-input'.
If FORMS completes, then the return value is the same as `progn'."
  `(let ((semantic-current-input-throw-symbol ,symbol)
         (semantic--on-input-start-marker (point-marker)))
     (catch ,symbol
       ,@forms)))
(put 'semantic-exit-on-input 'lisp-indent-function 1)

(defmacro semantic-throw-on-input (from)
  "Exit with `throw' when in `semantic-exit-on-input' on user input.
FROM is an indication of where this function is called from as a value
to pass to `throw'.  It is recommended to use the name of the function
calling this one."
  `(when (and semantic-current-input-throw-symbol
              (or (input-pending-p)
                  (save-excursion
                    ;; Timers might run during accept-process-output.
                    ;; If they redisplay, point must be where the user
                    ;; expects. (Bug#15045)
                    (set-buffer (marker-buffer
                                 semantic--on-input-start-marker))
                    (goto-char (marker-position
                                semantic--on-input-start-marker))
                    (accept-process-output))))
     (throw semantic-current-input-throw-symbol ,from)))


;;; Special versions of Find File
;;
(defun semantic-find-file-noselect (file &optional nowarn rawfile wildcards)
  "Call `find-file-noselect' with various features turned off.
Use this when referencing a file that will be soon deleted.
FILE, NOWARN, RAWFILE, and WILDCARDS are passed into `find-file-noselect'"
  ;; Hack -
  ;; Check if we are in set-auto-mode, and if so, warn about this.
  (when (or  (and (featurep 'emacs) (boundp 'keep-mode-if-same))
	     (and (featurep 'xemacs) (boundp 'just-from-file-name)))
    (let ((filename (or (and (boundp 'filename) filename)
			"(unknown)")))
      (message "WARNING: semantic-find-file-noselect called for \
%s while in set-auto-mode for %s.  You should call the responsible function \
into `mode-local-init-hook'." file filename)
      (sit-for 1)))

  (let* ((recentf-exclude '( (lambda (f) t) ))
	 ;; This is a brave statement.  Don't waste time loading in
	 ;; lots of modes.  Especially decoration mode can waste a lot
	 ;; of time for a buffer we intend to kill.
	 (semantic-init-hook nil)
	 ;; This disables the part of EDE that asks questions
	 (ede-auto-add-method 'never)
	 ;; Ask font-lock to not colorize these buffers, nor to
	 ;; whine about it either.
	 (global-font-lock-mode nil)
	 (font-lock-verbose nil)
	 ;; This forces flymake to ignore this buffer on find-file, and
	 ;; prevents flymake processes from being started.
	 (flymake-start-syntax-check-on-find-file nil)
	 ;; Disable revision control
	 (vc-handled-backends nil)
	 ;; Don't prompt to insert a template if we visit an empty file
	 (auto-insert nil)
	 ;; We don't want emacs to query about unsafe local variables
	 (enable-local-variables :safe)
	 ;; ... or eval variables
	 (enable-local-eval nil)
	 )
    (save-match-data
      (if (featurep 'xemacs)
	  (find-file-noselect file nowarn rawfile)
	(find-file-noselect file nowarn rawfile wildcards)))
    ))

;;; Database restriction settings
;;
(defmacro semanticdb-without-unloaded-file-searches (forms)
  "Execute FORMS with `unloaded' removed from the current throttle."
  `(let ((semanticdb-find-default-throttle
	  (if (featurep 'semantic/db-find)
	      (remq 'unloaded semanticdb-find-default-throttle)
	    nil)))
     ,forms))
(put 'semanticdb-without-unloaded-file-searches 'lisp-indent-function 1)


;; ;;; Editor goodies ;-)
;; ;;
;; (defconst semantic-fw-font-lock-keywords
;;   (eval-when-compile
;;     (let* (
;;            ;; Variable declarations
;; 	   (vl nil)
;;            (kv (if vl (regexp-opt vl t) ""))
;;            ;; Function declarations
;; 	   (vf '(
;; 		 "define-lex"
;; 		 "define-lex-analyzer"
;; 		 "define-lex-block-analyzer"
;; 		 "define-lex-regex-analyzer"
;; 		 "define-lex-spp-macro-declaration-analyzer"
;; 		 "define-lex-spp-macro-undeclaration-analyzer"
;; 		 "define-lex-spp-include-analyzer"
;; 		 "define-lex-simple-regex-analyzer"
;; 		 "define-lex-keyword-type-analyzer"
;; 		 "define-lex-sexp-type-analyzer"
;; 		 "define-lex-regex-type-analyzer"
;; 		 "define-lex-string-type-analyzer"
;; 		 "define-lex-block-type-analyzer"
;; 		 ;;"define-mode-overload-implementation"
;; 		 ;;"define-semantic-child-mode"
;; 		 "define-semantic-idle-service"
;; 		 "define-semantic-decoration-style"
;; 		 "define-wisent-lexer"
;; 		 "semantic-alias-obsolete"
;; 		 "semantic-varalias-obsolete"
;; 		 "semantic-make-obsolete-overload"
;; 		 "defcustom-mode-local-semantic-dependency-system-include-path"
;; 		 ))
;;            (kf (if vf (regexp-opt vf t) ""))
;;            ;; Regexp depths
;;            (kv-depth (if kv (regexp-opt-depth kv) nil))
;;            (kf-depth (if kf (regexp-opt-depth kf) nil))
;;            )
;;       `((,(concat
;;            ;; Declarative things
;;            "(\\(" kv "\\|" kf "\\)"
;;            ;; Whitespaces & names
;;            "\\>[ \t]*\\(\\sw+\\)?[ \t]*\\(\\sw+\\)?"
;;            )
;;          (1 font-lock-keyword-face)
;;          (,(+ 1 kv-depth kf-depth 1)
;;           (cond ((match-beginning 2)
;;                  font-lock-type-face)
;;                 ((match-beginning ,(+ 1 kv-depth 1))
;;                  font-lock-function-name-face)
;;                 )
;;           nil t)
;;          (,(+ 1 kv-depth kf-depth 1 1)
;;           (cond ((match-beginning 2)
;;                  font-lock-variable-name-face)
;;                 )
;;           nil t)))
;;       ))
;;   "Highlighted Semantic keywords.")

;; (when (fboundp 'font-lock-add-keywords)
;;   (font-lock-add-keywords 'emacs-lisp-mode
;;                           semantic-fw-font-lock-keywords))

;;; Interfacing with edebug
;;
(defun semantic-fw-add-edebug-spec ()
  (def-edebug-spec semantic-exit-on-input 'def-body))

(add-hook 'edebug-setup-hook 'semantic-fw-add-edebug-spec)

(provide 'semantic/fw)

;;; semantic/fw.el ends here