emacs / lisp / expand.el

  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
;;; expand.el --- make abbreviations more usable.

;; Copyright (C) 1995, 1996 Free Software Foundation, Inc.

;; Author: Frederic Lepied <Frederic.Lepied@sugix.frmug.org>
;; Maintainer: Frederic Lepied <Frederic.Lepied@sugix.frmug.org>
;; Keywords: abbrev

;; 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 2, 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; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:
;;
;; This package defines abbrevs which expand into structured constructs
;; for certain languages.  The construct is indented for you,
;; and contains slots for you to fill in other text.

;; These abbrevs expand only at the end of a line and when not in a comment
;; or a string.
;;
;;   Look at the Sample: section for emacs-lisp, perl and c expand lists.
;; For example for c-mode, you could declare your abbrev table with :
;;
;; (defconst c-expand-list
;;   '(("if" "if () {\n \n} else {\n \n}" (5 10 21))
;;     ("ifn" "if () {}" (5 8))
;;     ("uns" "unsigned ")
;;     ("for" "for(; ; ) {\n\n}" (5 7 9 13))
;;     ("switch" "switch () {\n\n}" (9 13))
;;     ("case" "case :\n\nbreak;\n" (6 8 16))
;;     ("do" "do {\n\n} while ();" (6 16))
;;     ("while" "while () {\n\n}" (8 12))
;;     ("default" "default:\n\nbreak;" 10)
;;     ("main" "int\nmain(int argc, char * argv[])\n{\n\n}\n" 37))
;;   "Expansions for C mode")
;; 
;;   and enter Abbrev mode with the following hook :
;;
;; (add-hook 'c-mode-hook (function (lambda ()
;; 				   (expand-add-abbrevs c-mode-abbrev-table c-expand-list)
;; 				   (abbrev-mode))))
;;
;;   you can also init some post-process hooks :
;;
;; (add-hook 'expand-load-hook
;; 	  (function
;; 	   (lambda ()
;; 	     (add-hook 'expand-expand-hook 'indent-according-to-mode)
;; 	     (add-hook 'expand-jump-hook 'indent-according-to-mode))))
;;
;; Remarks:
;;
;;   Many thanks to Heddy Boubaker <boubaker@cenatls.cena.dgac.fr>,
;;                  Jerome Santini <santini@chambord.univ-orleans.fr>,
;;                  Jari Aalto <jaalto@tre.tele.nokia.fi>.
;;
;;   Please send me a word to give me your feeling about this feature or
;; to explain me how you use it (your expansions table for example) using
;; the function expand-submit-report.

;;; Constants:

(defvar expand-load-hook nil
  "Hooks run when `expand.el' is loaded.")

(defvar expand-expand-hook nil
  "Hooks run when an abbrev made by `expand-add-abbrevs' is expanded.")

(defvar expand-jump-hook nil
  "Hooks run by `expand-jump-to-previous-slot' and `expand-jump-to-next-slot'.")

;;; Samples:

(define-skeleton expand-c-for-skeleton "For loop skeleton"
  "Loop var: "
  "for(" str _ @ "=0; " str @ "; " str @ ") {" \n
  @ _ \n
  "}" >
  )

(defconst expand-c-sample-expand-list
  '(("if" "if () {\n \n} else {\n \n}" (5 10 21))
    ("ifn" "if () {}" (5 8))
    ("uns" "unsigned ")
    ("for" expand-c-for-skeleton)
    ("switch" "switch () {\n\n}" (9 13))
    ("case" "case :\n\nbreak;\n" (6 8 16))
    ("do" "do {\n\n} while ();" (6 16))
    ("while" "while () {\n\n}" (8 12))
    ("default" "default:\n\nbreak;" 10)
    ("main" "int\nmain(int argc, char * argv[])\n{\n\n}\n" 37))
  "Expansions for C mode. See `expand-add-abbrevs'.")

;; lisp example from Jari Aalto <jaalto@tre.tele.nokia.fi>
(defconst expand-sample-lisp-mode-expand-list
  (list
   (list
    "defu"
    (concat
     "(defun   ()\n"
     "  \"\"\n"
     "  (interactive)\n"
     "  (let* (\n"
     "         )\n"
     "    \n"
     "    ))")
    (list 8 11 16 32 43 59))

   (list
    "defs"
    (concat
     "(defsubst   ()\n"
     "  \"\"\n"
     "  (interactive)\n"
     "  )")
    (list 11 14 19 23 39))

   (list
    "defm"
    (concat
     "(defmacro  ()\n"
     "  \"\"\n"
     "  (` \n"
     "    ))")
    (list 11 13 18 25))

   (list
    "defa"
    (concat
     "(defadvice   (around   act)\n"
     "  \"\"\n"
     "  \n"
     "  )")
    (list 12 22 32 36))

    (list
     "defc"
     "(defconst   nil\n  \"\")\n"
     (list 11 13 20))

    (list
     "defv"
     "(defvar   nil\n  \"\")\n"
     (list 9 11 18))

    (list
     "let"
     "(let* (\n)\n    "
     (list 8 13))

     (list
     "sav"
     "(save-excursion\n \n)"
     (list 18))

     (list
     "aut"
     "(autoload ' \"\" t t)\n"
     (list 12 14))

    )
   "Expansions for Lisp mode. See `expand-add-abbrevs'.")
 
;; perl example from Jari Aalto <jaalto@tre.tele.nokia.fi>
(defconst expand-sample-perl-mode-expand-list
  (list
   (list
    ;;   This is default perl4 subroutine template
    ;;
    "sub"
    (concat
     "#" (make-string 70 ?-) "\n"
     "sub   {\n"
     "    # DESCRIPTION\n"
     "    #   \n"
     "    #   \n"
     "    # INPUT\n"
     "    #   \n"
     "    #   \n"
     "    # RETURN\n"
     "    #   \n"
     "\n"
     "    local( $f ) = \"$lib.\";\n"   ;; Function name AFTER period
     "    local() = @_;\n"              ;; func arguments here
     "    \n"
     "    \n}\n"
     )
    (list 77 88 120 146 159 176))

   (list
    "for"                               ; foreach
    (concat
     "for (  )\n"
     "{\n\n\}"
     )
    (list 7 12))

   (list
    "whi"                               ; foreach
    (concat
     "while (  )\n"
     "{\n\n\}"
     )
    (list 9 15))


   ;;   The normal "if" can be used like
   ;;   print $F "xxxxxx"  if defined @arr;
   ;;
   (list
    "iff"
    (concat
     "if (  )\n"
     "{\n\n\}"
     )
    (list 6 12))

   (list "loc"  "local( $ );"   (list 9))
   (list "my"   "my( $ );"      (list 6))
   (list "ope"  "open(,\"\")\t|| die \"$f: Can't open [$]\";" (list 6 8 36))
   (list "clo"  "close ;"       7)
   (list "def"  "defined  "     (list 9))
   (list "und"  "undef ;"       (list 7))

   ;;   There is no ending colon, because they can be in statement
   ;;    defined $REXP_NOT_NEW && (print "xxxxx" );
   ;;
   (list "pr"  "print "         7)
   (list "pf"  "printf "        8)


   (list "gre"  "grep( //, );"  (list 8 11))
   (list "pus"  "push( , );"    (list 7 9))
   (list "joi"  "join( '', );"  (list 7 11))
   (list "rtu"  "return ;"      (list 8))

   )
  "Expansions for Perl mode. See `expand-add-abbrevs'.")

;;; Code:

;;;###autoload
(defun expand-add-abbrevs (table abbrevs)
  "Add a list of abbrev to abbrev table TABLE.
ABBREVS is a list of abbrev definitions; each abbrev description entry
has the form (ABBREV EXPANSION ARG).

ABBREV is the abbreviation to replace.

EXPANSION is the replacement string or a function which will make the
expansion.  For example you, could use the DMacros or skeleton packages
to generate such functions.

ARG is an optional argument which can be a number or a list of
numbers.  If ARG is a number, point is placed ARG chars from the
beginning of the expanded text.

If ARG is a list of numbers, point is placed according to the first
member of the list, but you can visit the other specified positions
cyclicaly with the functions `expand-jump-to-previous-slot' and
`expand-jump-to-next-slot'.

If ARG is omitted, point is placed at the end of the expanded text."

  (if (null abbrevs)
      table
    (expand-add-abbrev table (nth 0 (car abbrevs)) (nth 1 (car abbrevs))
		       (nth 2 (car abbrevs)))
    (expand-add-abbrevs table (cdr abbrevs))))

(defvar expand-list nil "Temporary variable used by the Expand package.")

(defvar expand-pos nil
  "If non nil, stores a vector containing markers to positions defined by the last expansion.
This variable is local to a buffer.")
(make-variable-buffer-local 'expand-pos)

(defvar expand-index 0
  "Index of the last marker used in `expand-pos'.
This variable is local to a buffer.")
(make-variable-buffer-local 'expand-index)

(defvar expand-point nil
  "End of the expanded region.
This variable is local to a buffer.")
(make-variable-buffer-local 'expand-point)

(defun expand-add-abbrev (table abbrev expansion arg)
  "Add one abbreviation and provide the hook to move to the specified positions."
  (let* ((string-exp (if (and (symbolp expansion) (fboundp expansion))
			 nil
		       expansion))
         (position   (if (and arg string-exp)
			 (if (listp arg)
			     (- (length expansion) (1- (car arg)))
			   (- (length expansion) (1- arg)))
		       0)))
    (define-abbrev
      table
      abbrev
      (vector string-exp
	      position
	      (if (and (listp arg)
		       (not (null arg)))
		  (cons (length string-exp) arg)
		nil)
	      (if (and (symbolp expansion) (fboundp expansion))
		  expansion
		nil)
	      )
      'expand-abbrev-hook)))

(put 'expand-abbrev-hook 'no-self-insert t)
(defun expand-abbrev-hook ()
  "Abbrev hook used to do the expansion job of expand abbrevs.
See `expand-add-abbrevs'."
  ;; Expand only at the end of a line if we are near a word that has
  ;; an abbrev built from expand-add-abbrev.
  (if (and (eolp)
	   (not (expand-in-literal)))
      (let ((p (point)))
	(setq expand-point nil)
	;; don't expand if the preceding char isn't a word constituent
	(if (and (eq (char-syntax (preceding-char))
		     ?w)
		 (expand-do-expansion))
	    (progn
	      ;; expand-point tells us if we have inserted the text
	      ;; ourself or if it is the hook which has done the job.
	      (if expand-point
		  (progn
		    (if (vectorp expand-list)
			(expand-build-marks expand-point))
		    (indent-region p expand-point nil))
		;; an outside function can set expand-list to a list of
		;; markers in reverse order.
		(if (listp expand-list)
		    (setq expand-index 0
			  expand-pos (expand-list-to-markers expand-list)
			  expand-list nil)))
	      (run-hooks 'expand-expand-hook)
	      t))))
  )

(defun expand-do-expansion ()
  (delete-backward-char (length last-abbrev-text))
  (let* ((vect (symbol-value last-abbrev))
	 (text (aref vect 0))
	 (position (aref vect 1))
	 (jump-args (aref vect 2))
	 (hook (aref vect 3)))
    (cond (text
	   (insert text)
	   (setq expand-point (point))))
    (if jump-args
	(funcall 'expand-build-list (car jump-args) (cdr jump-args)))
    (if position
	(backward-char position))
    (if hook
	(funcall hook))
    t)
  )

(defun expand-abbrev-from-expand (word)
  "Test if an abbrev has a hook."
  (or
   (and (intern-soft word local-abbrev-table)
	(symbol-function (intern-soft word local-abbrev-table)))
   (and (intern-soft word global-abbrev-table)
	(symbol-function (intern-soft word global-abbrev-table)))))

(defun expand-previous-word ()
  "Return the previous word."
  (save-excursion
    (let ((p (point)))
      (backward-word 1)
      (buffer-substring p (point)))))

;;;###autoload
(defun expand-jump-to-previous-slot ()
  "Move the cursor to the previous slot in the last abbrev expansion.
This is used only in conjunction with `expand-add-abbrevs'."
  (interactive)
  (if expand-pos
      (progn
	(setq expand-index (1- expand-index))
	(if (< expand-index 0)
	    (setq expand-index (1- (length expand-pos))))
	(goto-char (aref expand-pos expand-index))
	(run-hooks 'expand-jump-hook))))

;;;###autoload
(defun expand-jump-to-next-slot ()
  "Move the cursor to the next slot in the last abbrev expansion.
This is used only in conjunction with `expand-add-abbrevs'."
  (interactive)
  (if expand-pos
      (progn
	(setq expand-index (1+ expand-index))
	(if (>= expand-index (length expand-pos))
	    (setq expand-index 0))
	(goto-char (aref expand-pos expand-index))
	(run-hooks 'expand-jump-hook))))

;;;###autoload (define-key ctl-x-map "ap" 'expand-jump-to-previous-slot)
;;;###autoload (define-key ctl-x-map "an" 'expand-jump-to-next-slot)

(defun expand-build-list (len l)
  "Build a vector of offset positions from the list of positions."
  (expand-clear-markers)
  (setq expand-list (vconcat l))
  (let ((i 0)
	(lenlist (length expand-list)))
    (while (< i lenlist)
      (aset expand-list i (- len (1- (aref expand-list i))))
      (setq i (1+ i))))
  )

(defun expand-build-marks (p)
  "Transform the offsets vector into a marker vector."
  (if expand-list
      (progn
	(setq expand-index 0)
	(setq expand-pos (make-vector (length expand-list) nil))
	(let ((i (1- (length expand-list))))
	  (while (>= i 0)
	    (aset expand-pos i (copy-marker (- p (aref expand-list i))))
	    (setq i (1- i))))
	(setq expand-list nil))))

(defun expand-clear-markers ()
  "Make the markers point nowhere."
  (if expand-pos
      (progn
    (let ((i (1- (length expand-pos))))
      (while (>= i 0)
	(set-marker (aref expand-pos i) nil)
	(setq i (1- i))))
    (setq expand-pos nil))))

(defun expand-in-literal ()
  "Test if we are in a comment or in a string."
  (save-excursion
    (let* ((lim (or (save-excursion
		      (beginning-of-defun)
		      (point))
		    (point-min)))
	   (here (point))
	   (state (parse-partial-sexp lim (point))))
      (cond
       ((nth 3 state) 'string)
       ((nth 4 state) 'comment)
       (t nil)))))

;; support functions to add marks to jump from outside function

(defun expand-list-to-markers (l)
  "Transform a list of markers in reverse order into a vector in the correct order."
  (let* ((len (1- (length l)))
	 (loop len)
	 (v (make-vector (+ len 1) nil)))
    (while (>= loop 0)
      (aset v loop (if (markerp (car l)) (car l) (copy-marker (car l))))
      (setq l (cdr l)
	    loop (1- loop)))
    v))

;; integration with skeleton.el
;; Used in `skeleton-end-hook' to fetch the positions for  @ skeleton tags.
;; See `skeleton-insert'.
(defun expand-skeleton-end-hook ()
  (if skeleton-positions
      (setq expand-list skeleton-positions)))
  
(add-hook 'skeleton-end-hook (function expand-skeleton-end-hook))

(provide 'expand)

;; run load hooks
(run-hooks 'expand-load-hook)

;;; expand.el ends here
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.