forked from haskell/haskell-mode
-
Notifications
You must be signed in to change notification settings - Fork 0
/
haskell-interactive-mode.el
1131 lines (1003 loc) · 46.4 KB
/
haskell-interactive-mode.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
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
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
;;; haskell-interactive-mode.el --- The interactive Haskell mode -*- lexical-binding: t -*-
;; Copyright © 2011-2012 Chris Done
;; 2016 Arthur Fayzrakhmanov
;; Author: Chris Done <[email protected]>
;; This file is not part of GNU Emacs.
;; This file 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, or (at your option)
;; any later version.
;; This file 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; Todo:
;;; Code:
(require 'haskell-mode)
(require 'haskell-compile)
(require 'haskell-navigate-imports)
(require 'haskell-process)
(require 'haskell-collapse)
(require 'haskell-session)
(require 'haskell-font-lock)
(require 'haskell-presentation-mode)
(require 'haskell-utils)
(require 'ansi-color)
(require 'cl-lib)
(require 'etags)
(defvar-local haskell-interactive-mode-history-index 0)
(defvar-local haskell-interactive-mode-history (list))
(defvar-local haskell-interactive-mode-old-prompt-start nil
"Mark used for the old beginning of the prompt.")
(defun haskell-interactive-prompt-regex ()
"Generate a regex for searching for any occurence of the prompt\
at the beginning of the line. This should prevent any
interference with prompts that look like haskell expressions."
(concat "^" (regexp-quote haskell-interactive-prompt)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Globals used internally
(declare-function haskell-interactive-kill "haskell")
(defvar haskell-interactive-mode-map
(let ((map (make-sparse-keymap)))
(define-key map (kbd "RET") 'haskell-interactive-mode-return)
(define-key map (kbd "SPC") 'haskell-interactive-mode-space)
(define-key map (kbd "C-j") 'haskell-interactive-mode-newline-indent)
(define-key map (kbd "C-a") 'haskell-interactive-mode-beginning)
(define-key map (kbd "<home>") 'haskell-interactive-mode-beginning)
(define-key map (kbd "C-c C-k") 'haskell-interactive-mode-clear)
(define-key map (kbd "C-c C-c") 'haskell-process-interrupt)
(define-key map (kbd "C-c C-f") 'next-error-follow-minor-mode)
(define-key map (kbd "C-c C-z") 'haskell-interactive-switch-back)
(define-key map (kbd "M-p") 'haskell-interactive-mode-history-previous)
(define-key map (kbd "M-n") 'haskell-interactive-mode-history-next)
(define-key map (kbd "C-c C-p") 'haskell-interactive-mode-prompt-previous)
(define-key map (kbd "C-c C-n") 'haskell-interactive-mode-prompt-next)
(define-key map (kbd "C-<up>") 'haskell-interactive-mode-history-previous)
(define-key map (kbd "C-<down>") 'haskell-interactive-mode-history-next)
(define-key map (kbd "TAB") 'haskell-interactive-mode-tab)
(define-key map (kbd "<C-S-backspace>") 'haskell-interactive-mode-kill-whole-line)
map)
"Keymap used in `haskell-interactive-mode'.")
(define-derived-mode haskell-interactive-mode fundamental-mode "Interactive-Haskell"
"Interactive mode for Haskell.
Key bindings:
\\{haskell-interactive-mode-map}"
:group 'haskell-interactive
:syntax-table haskell-mode-syntax-table
(setq haskell-interactive-mode-history (list))
(setq haskell-interactive-mode-history-index 0)
(setq next-error-function #'haskell-interactive-next-error-function)
(add-hook 'completion-at-point-functions
#'haskell-interactive-mode-completion-at-point-function nil t)
(add-hook 'kill-buffer-hook #'haskell-interactive-kill nil t)
(haskell-interactive-mode-prompt))
(defvar haskell-interactive-mode-prompt-start
nil
"Mark used for the beginning of the prompt.")
(defvar haskell-interactive-mode-result-end
nil
"Mark used to figure out where the end of the current result output is.
Used to distinguish betwen user input.")
(defvar-local haskell-interactive-previous-buffer nil
"Records the buffer to which `haskell-interactive-switch-back' should jump.
This is set by `haskell-interactive-switch', and should otherwise
be nil.")
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Hooks
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Mode
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Faces
;;;###autoload
(defface haskell-interactive-face-prompt
'((t :inherit font-lock-function-name-face))
"Face for the prompt."
:group 'haskell-interactive)
;;;###autoload
(defface haskell-interactive-face-prompt2
'((t :inherit font-lock-keyword-face))
"Face for the prompt2 in multi-line mode."
:group 'haskell-interactive)
;;;###autoload
(defface haskell-interactive-face-compile-error
'((t :inherit compilation-error))
"Face for compile errors."
:group 'haskell-interactive)
;;;###autoload
(defface haskell-interactive-face-compile-warning
'((t :inherit compilation-warning))
"Face for compiler warnings."
:group 'haskell-interactive)
;;;###autoload
(defface haskell-interactive-face-result
'((t :inherit font-lock-string-face))
"Face for the result."
:group 'haskell-interactive)
;;;###autoload
(defface haskell-interactive-face-garbage
'((t :inherit font-lock-string-face))
"Face for trailing garbage after a command has completed."
:group 'haskell-interactive)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Actions
(defun haskell-interactive-mode-newline-indent ()
"Make newline and indent."
(interactive)
(newline)
(indent-to (length haskell-interactive-prompt))
(indent-relative))
(defun haskell-interactive-mode-kill-whole-line ()
"Kill the whole REPL line."
(interactive)
(kill-region haskell-interactive-mode-prompt-start
(line-end-position)))
(defun haskell-interactive-switch-back ()
"Switch back to the buffer from which this interactive buffer was reached."
(interactive)
(if haskell-interactive-previous-buffer
(switch-to-buffer-other-window haskell-interactive-previous-buffer)
(message "No previous buffer.")))
(defun haskell-interactive-copy-to-prompt ()
"Copy the current line to the prompt, overwriting the current prompt."
(interactive)
(let ((l (buffer-substring-no-properties (line-beginning-position)
(line-end-position))))
;; If it looks like the prompt is at the start of the line, chop
;; it off.
(when (and (>= (length l) (length haskell-interactive-prompt))
(string= (substring l 0 (length haskell-interactive-prompt))
haskell-interactive-prompt))
(setq l (substring l (length haskell-interactive-prompt))))
(haskell-interactive-mode-set-prompt l)))
(defun haskell-interactive-mode-space (n)
"Handle the space key."
(interactive "p")
(if (and (bound-and-true-p god-local-mode)
(fboundp 'god-mode-self-insert))
(call-interactively 'god-mode-self-insert)
(if (haskell-interactive-at-compile-message)
(next-error-no-select 0)
(self-insert-command n))))
(defun haskell-interactive-at-prompt (&optional end-line)
"If at prompt, return start position of user-input, otherwise return nil.
If END-LINE is non-nil, then return non-nil when the end of line
is at the prompt."
(if (>= (if end-line (line-end-position) (point))
haskell-interactive-mode-prompt-start)
haskell-interactive-mode-prompt-start
nil))
(define-derived-mode haskell-error-mode
special-mode "Error"
"Major mode for viewing Haskell compile errors.")
;; (define-key haskell-error-mode-map (kbd "q") 'quit-window)
(defun haskell-interactive-mode-handle-h ()
"Handle ^H in output."
(let ((bound (point-min))
(inhibit-read-only t))
(save-excursion
(while (search-backward "\b" bound t 1)
(save-excursion
(forward-char)
(let ((end (point)))
(if (search-backward-regexp "[^\b]" bound t 1)
(forward-char)
(goto-char (point-min)))
(let ((start (point)))
(delete-region (max (- (point) (- end start))
(point-min))
end))))))))
(defun haskell-interactive-mode-multi-line (expr)
"If a multi-line expression EXPR has been entered, then reformat it to be:
:{
do the
multi-liner
expr
:}"
(if (not (string-match-p "\n" expr))
expr
(let ((pre (format "^%s" (regexp-quote haskell-interactive-prompt)))
(lines (split-string expr "\n")))
(cl-loop for elt on (cdr lines) do
(setcar elt (replace-regexp-in-string pre "" (car elt))))
;; Temporarily set prompt2 to be empty to avoid unwanted output
(concat ":set prompt2 \"\"\n"
":{\n"
(mapconcat #'identity lines "\n")
"\n:}\n"
(format ":set prompt2 \"%s\"" haskell-interactive-prompt2)))))
(defun haskell-interactive-mode-line-is-query (line)
"Is LINE actually a :t/:k/:i?"
(and (string-match "^:[itk] " line)
t))
(defun haskell-interactive-mode-beginning ()
"Go to the start of the line."
(interactive)
(if (haskell-interactive-at-prompt)
(goto-char haskell-interactive-mode-prompt-start)
(move-beginning-of-line nil)))
(defun haskell-interactive-mode-input-partial ()
"Get the interactive mode input up to point."
(let ((input-start (haskell-interactive-at-prompt)))
(unless input-start
(error "not at prompt"))
(buffer-substring-no-properties input-start (point))))
(defun haskell-interactive-mode-input ()
"Get the interactive mode input."
(buffer-substring-no-properties
haskell-interactive-mode-prompt-start
(point-max)))
(defun haskell-interactive-mode-prompt (&optional session)
"Show a prompt at the end of the REPL buffer.
If SESSION is non-nil, use the REPL buffer associated with
SESSION, otherwise operate on the current buffer."
(with-current-buffer (if session
(haskell-session-interactive-buffer session)
(current-buffer))
(save-excursion
(goto-char (point-max))
(let ((prompt (propertize haskell-interactive-prompt
'font-lock-face 'haskell-interactive-face-prompt
'prompt t
'read-only haskell-interactive-prompt-read-only
'rear-nonsticky t)))
;; At the time of writing, front-stickying the first char gives an error
;; Has unfortunate side-effect of being able to insert before the prompt
(insert (substring prompt 0 1)
(propertize (substring prompt 1)
'front-sticky t)))
(let ((marker (setq-local haskell-interactive-mode-prompt-start (make-marker))))
(set-marker marker (point))))
(when (haskell-interactive-at-prompt t)
(haskell-interactive-mode-scroll-to-bottom))))
(defun haskell-interactive-mode-eval-result (session text)
"Insert the result of an eval as plain text."
(with-current-buffer (haskell-session-interactive-buffer session)
(let ((at-end (eobp))
(prop-text (propertize text
'font-lock-face 'haskell-interactive-face-result
'front-sticky t
'prompt t
'read-only haskell-interactive-mode-read-only
'rear-nonsticky t
'result t)))
(save-excursion
(goto-char (point-max))
(when (string= text haskell-interactive-prompt2)
(setq prop-text
(propertize prop-text
'font-lock-face 'haskell-interactive-face-prompt2
'read-only haskell-interactive-prompt-read-only)))
(insert (ansi-color-apply prop-text))
(haskell-interactive-mode-handle-h)
(let ((marker (setq-local haskell-interactive-mode-result-end (make-marker))))
(set-marker marker (point))))
(when at-end
(haskell-interactive-mode-scroll-to-bottom)))))
(defun haskell-interactive-mode-scroll-to-bottom ()
"Scroll to bottom."
(let ((w (get-buffer-window (current-buffer))))
(when w
(goto-char (point-max))
(set-window-point w (point)))))
(defun haskell-interactive-mode-compile-error (session message)
"Echo an error."
(haskell-interactive-mode-compile-message
session message 'haskell-interactive-face-compile-error))
(defun haskell-interactive-mode-compile-warning (session message)
"Warning message."
(haskell-interactive-mode-compile-message
session message 'haskell-interactive-face-compile-warning))
(defun haskell-interactive-mode-compile-message (session message type)
"Echo a compiler warning."
(with-current-buffer (haskell-session-interactive-buffer session)
(setq next-error-last-buffer (current-buffer))
(save-excursion
(haskell-interactive-mode-goto-end-point)
(let ((lines (string-match "^\\(.*\\)\n\\([[:unibyte:][:nonascii:]]+\\)" message)))
(if lines
(progn
(insert (propertize (concat (match-string 1 message) " …\n")
'expandable t
'font-lock-face type
'front-sticky t
'read-only haskell-interactive-mode-read-only
'rear-nonsticky t))
(insert (propertize (concat (match-string 2 message) "\n")
'collapsible t
'font-lock-face type
'front-sticky t
'invisible haskell-interactive-mode-hide-multi-line-errors
'message-length (length (match-string 2 message))
'read-only haskell-interactive-mode-read-only
'rear-nonsticky t)))
(insert (propertize (concat message "\n")
'font-lock-face type
'front-sticky t
'read-only haskell-interactive-mode-read-only
'rear-nonsticky t)))))))
(defun haskell-interactive-mode-insert (session message)
"Echo a read only piece of text before the prompt."
(with-current-buffer (haskell-session-interactive-buffer session)
(save-excursion
(haskell-interactive-mode-goto-end-point)
(insert (propertize message
'front-sticky t
'read-only t
'rear-nonsticky t)))))
(defun haskell-interactive-mode-goto-end-point ()
"Go to the 'end' of the buffer (before the prompt)."
(goto-char haskell-interactive-mode-prompt-start)
(goto-char (line-beginning-position)))
(defun haskell-interactive-mode-history-add (input)
"Add INPUT to the history."
(setq haskell-interactive-mode-history
(cons ""
(cons input
(cl-remove-if (lambda (i) (or (string= i input) (string= i "")))
haskell-interactive-mode-history))))
(setq haskell-interactive-mode-history-index
0))
(defun haskell-interactive-mode-tab ()
"Do completion if at prompt or else try collapse/expand."
(interactive)
(cond
((haskell-interactive-at-prompt)
(completion-at-point))
((get-text-property (point) 'collapsible)
(let ((column (current-column)))
(search-backward-regexp "^[^ ]")
(haskell-interactive-mode-tab-expand)
(goto-char (+ column (line-beginning-position)))))
(t (haskell-interactive-mode-tab-expand))))
(defun haskell-interactive-mode-tab-expand ()
"Expand the rest of the message."
(cond ((get-text-property (point) 'expandable)
(let* ((pos (1+ (line-end-position)))
(visibility (get-text-property pos 'invisible))
(length (1+ (get-text-property pos 'message-length))))
(let ((inhibit-read-only t))
(put-text-property pos
(+ pos length)
'invisible
(not visibility)))))))
(defconst haskell-interactive-mode-error-regexp
"^\\(\\(?:[A-Z]:\\)?[^ \r\n:][^\r\n:]*\\):\\([0-9()-:]+\\):?")
(defun haskell-interactive-at-compile-message ()
"Am I on a compile message?"
(and (not (haskell-interactive-at-prompt))
(save-excursion
(goto-char (line-beginning-position))
(looking-at haskell-interactive-mode-error-regexp))))
(defun haskell-interactive-mode-error-backward (&optional count)
"Go backward to the previous error."
(interactive)
(search-backward-regexp haskell-interactive-mode-error-regexp nil t count))
(defun haskell-interactive-mode-error-forward (&optional count)
"Go forward to the next error, or return to the REPL."
(interactive)
(goto-char (line-end-position))
(if (search-forward-regexp haskell-interactive-mode-error-regexp nil t count)
(progn (goto-char (line-beginning-position))
t)
(progn (goto-char (point-max))
nil)))
(defun haskell-interactive-mode-delete-compile-messages (session &optional file-name)
"Delete compile messages in REPL buffer.
If FILE-NAME is non-nil, restrict to removing messages concerning
FILE-NAME only."
(with-current-buffer (haskell-session-interactive-buffer session)
(save-excursion
(goto-char (point-min))
(when (search-forward-regexp "^Compilation failed.$" nil t 1)
(let ((inhibit-read-only t))
(delete-region (line-beginning-position)
(1+ (line-end-position))))
(goto-char (point-min)))
(while (when (re-search-forward haskell-interactive-mode-error-regexp nil t)
(let ((msg-file-name (match-string-no-properties 1))
(msg-startpos (line-beginning-position)))
;; skip over hanging continuation message lines
(while (progn (forward-line) (looking-at "^[ ]+")))
(when (or (not file-name) (string= file-name msg-file-name))
(let ((inhibit-read-only t))
(set-text-properties msg-startpos (point) nil))
(delete-region msg-startpos (point))
))
t)))))
;;;###autoload
(defun haskell-interactive-mode-reset-error (session)
"Reset the error cursor position."
(interactive)
(with-current-buffer (haskell-session-interactive-buffer session)
(haskell-interactive-mode-goto-end-point)
(let ((mrk (point-marker)))
(haskell-session-set session 'next-error-locus nil)
(haskell-session-set session 'next-error-region (cons mrk (copy-marker mrk t))))
(goto-char (point-max))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Misc
(declare-function haskell-interactive-switch "haskell")
(declare-function haskell-session "haskell")
(defun haskell-session-interactive-buffer (s)
"Get the session interactive buffer."
(let ((buffer (haskell-session-get s 'interactive-buffer)))
(if (and buffer (buffer-live-p buffer))
buffer
(let ((buffer-name (format "*%s*" (haskell-session-name s)))
index)
(while (get-buffer buffer-name)
(setq buffer-name (format "*%s <%d>*" (haskell-session-name s) index))
(setq index (1+ index)))
(let ((buffer (get-buffer-create buffer-name)))
(haskell-session-set-interactive-buffer s buffer)
(with-current-buffer buffer
(haskell-interactive-mode)
(haskell-session-assign s))
(haskell-interactive-switch)
buffer)))))
(defun haskell-interactive-buffer ()
"Get the interactive buffer of the session."
(haskell-session-interactive-buffer (haskell-session)))
(defun haskell-process-cabal-live (state buffer)
"Do live updates for Cabal processes."
(haskell-interactive-mode-insert
(haskell-process-session (cadr state))
(replace-regexp-in-string
haskell-process-prompt-regex
""
(substring buffer (cl-cadddr state))))
(setf (cl-cdddr state) (list (length buffer)))
nil)
(defun haskell-process-parse-error (string)
"Parse the line number from the error string STRING."
(let ((span nil))
(cl-loop for regex
in haskell-compilation-error-regexp-alist
do (when (string-match (car regex) string)
(setq span
(list :file (match-string 1 string)
:line (string-to-number (match-string 2 string))
:col (string-to-number (match-string 4 string))
:line2 (when (match-string 3 string)
(string-to-number (match-string 3 string)))
:col2 (when (match-string 5 string)
(string-to-number (match-string 5 string)))))))
span))
(defun haskell-process-suggest-add-package (session msg)
"Add tthe (matched) module to your cabal file.
Cabal file is selected using SESSION's name, module matching is done in MSG."
(let* ((suggested-package (match-string 1 msg))
(package-name (replace-regexp-in-string "-[^-]+$" "" suggested-package))
(version (progn (string-match "\\([^-]+\\)$" suggested-package)
(match-string 1 suggested-package)))
(cabal-file (concat (haskell-session-name session)
".cabal")))
(haskell-mode-toggle-interactive-prompt-state)
(unwind-protect
(when (y-or-n-p
(format "Add `%s' to %s?"
package-name
cabal-file))
(haskell-cabal-add-dependency package-name version nil t)
(when (y-or-n-p (format "Enable -package %s in the GHCi session?" package-name))
(haskell-process-queue-without-filters
(haskell-session-process session)
(format ":set -package %s" package-name))))
(haskell-mode-toggle-interactive-prompt-state t))))
(defun haskell-process-suggest-remove-import (session file import line)
"Suggest removing or commenting out import statement.
Asks user to handle redundant import statement using interactive
SESSION in specified FILE to remove IMPORT on given LINE."
(let ((first t))
(haskell-mode-toggle-interactive-prompt-state)
(unwind-protect
(cl-case (read-event
(propertize (format "%sThe import line `%s' is redundant. Remove? (y, n, c: comment out) "
(if (not first)
"Please answer n, y or c: "
"")
import)
'face
'minibuffer-prompt))
(?y
(haskell-process-find-file session file)
(save-excursion
(goto-char (point-min))
(forward-line (1- line))
(goto-char (line-beginning-position))
(delete-region (line-beginning-position)
(line-end-position))))
(?n
(message "Ignoring redundant import %s" import))
(?c
(haskell-process-find-file session file)
(save-excursion
(goto-char (point-min))
(forward-line (1- line))
(goto-char (line-beginning-position))
(insert "-- "))))
;; unwind
(haskell-mode-toggle-interactive-prompt-state t))))
(defun haskell-process-find-file (session file)
"Find the given file in the project."
(find-file (cond ((file-exists-p (concat (haskell-session-current-dir session) "/" file))
(concat (haskell-session-current-dir session) "/" file))
((file-exists-p (concat (haskell-session-cabal-dir session) "/" file))
(concat (haskell-session-cabal-dir session) "/" file))
(t file))))
(defun haskell-process-suggest-pragma (session pragma extension file)
"Suggest to add something to the top of the file.
SESSION is used to search given file. Adds PRAGMA and EXTENSION
wrapped in compiler directive at the top of FILE."
(let ((string (format "{-# %s %s #-}" pragma extension)))
(haskell-mode-toggle-interactive-prompt-state)
(unwind-protect
(when (y-or-n-p (format "Add %s to the top of the file? " string))
(haskell-process-find-file session file)
(save-excursion
(goto-char (point-min))
(insert (concat string "\n"))))
(haskell-mode-toggle-interactive-prompt-state t))))
(defun haskell-interactive-mode-insert-error (response)
"Insert an error message."
(insert "\n"
(haskell-fontify-as-mode
response
'haskell-mode))
(haskell-interactive-mode-prompt))
(defun haskell-interactive-popup-error (response)
"Popup an error."
(if haskell-interactive-popup-errors
(let ((buf (get-buffer-create "*HS-Error*")))
(pop-to-buffer buf nil t)
(with-current-buffer buf
(haskell-error-mode)
(let ((inhibit-read-only t))
(erase-buffer)
(insert (propertize response
'font-lock-face
'haskell-interactive-face-compile-error))
(goto-char (point-min))
(delete-blank-lines)
(insert (propertize "-- Hit `q' to close this window.\n\n"
'font-lock-face 'font-lock-comment-face))
(save-excursion
(goto-char (point-max))
(insert (propertize "\n-- To disable popups, customize `haskell-interactive-popup-errors'.\n\n"
'font-lock-face 'font-lock-comment-face))))))
(haskell-interactive-mode-insert-error response)))
(defun haskell-interactive-next-error-function (&optional n reset)
"See `next-error-function' for more information."
(let* ((session (haskell-interactive-session))
(next-error-region (haskell-session-get session 'next-error-region))
(next-error-locus (haskell-session-get session 'next-error-locus))
(reset-locus nil))
(when (and next-error-region (or reset (and (/= n 0) (not next-error-locus))))
(goto-char (car next-error-region))
(unless (looking-at haskell-interactive-mode-error-regexp)
(haskell-interactive-mode-error-forward))
(setq reset-locus t)
(unless (looking-at haskell-interactive-mode-error-regexp)
(error "no errors found")))
;; move point if needed
(cond
(reset-locus nil)
((> n 0) (unless (haskell-interactive-mode-error-forward n)
(error "no more errors")))
((< n 0) (unless (haskell-interactive-mode-error-backward (- n))
(error "no more errors"))))
(let ((orig-line (buffer-substring-no-properties (line-beginning-position) (line-end-position))))
(when (string-match haskell-interactive-mode-error-regexp orig-line)
(let* ((msgmrk (set-marker (make-marker) (line-beginning-position)))
(location (haskell-process-parse-error orig-line))
(file (plist-get location :file))
(line (plist-get location :line))
(col1 (plist-get location :col))
(col2 (plist-get location :col2))
(cabal-relative-file (expand-file-name file (haskell-session-cabal-dir session)))
(src-relative-file (expand-file-name file (haskell-session-current-dir session)))
(real-file (cond ((file-exists-p cabal-relative-file) cabal-relative-file)
((file-exists-p src-relative-file) src-relative-file))))
(haskell-session-set session 'next-error-locus msgmrk)
(if real-file
(let ((m1 (make-marker))
(m2 (make-marker)))
(with-current-buffer (find-file-noselect real-file)
(save-excursion
(goto-char (point-min))
(forward-line (1- line))
(set-marker m1 (+ col1 (point) -1))
(when col2
(set-marker m2 (- (point) col2)))))
;; ...finally select&hilight error locus
(compilation-goto-locus msgmrk m1 (and (marker-position m2) m2)))
(error "don't know where to find %S" file)))))))
(defun haskell-interactive-session ()
"Get the `haskell-session', throw an error if it's not available."
(or (haskell-session-maybe)
(haskell-session-assign
(or (haskell-session-from-buffer)
(haskell-session-choose)
(error "No session associated with this buffer. Try M-x haskell-session-change or report this as a bug.")))))
(defun haskell-interactive-process ()
"Get the Haskell session."
(or (haskell-session-process (haskell-interactive-session))
(error "No Haskell session/process associated with this
buffer. Maybe run M-x haskell-process-restart?")))
(defun haskell-interactive-mode-do-presentation (expr)
"Present the given expression EXPR.
Requires the `present' package to be installed.
Will automatically import it qualified as Present."
(let ((p (haskell-interactive-process)))
;; If Present.code isn't available, we probably need to run the
;; setup.
(unless (string-match "^Present" (haskell-process-queue-sync-request p ":t Present.encode"))
(haskell-interactive-mode-setup-presentation p))
;; Happily, let statements don't affect the `it' binding in any
;; way, so we can fake it, no pun intended.
(let ((error (haskell-process-queue-sync-request
p (concat "let it = Present.asData (" expr ")"))))
(if (not (string= "" error))
(haskell-interactive-mode-eval-result (haskell-interactive-session) (concat error "\n"))
(let ((hash (haskell-interactive-mode-presentation-hash)))
(haskell-process-queue-sync-request
p (format "let %s = Present.asData (%s)" hash expr))
(let* ((presentation (haskell-interactive-mode-present-id
hash
(list 0))))
(insert "\n")
(haskell-interactive-mode-insert-presentation hash presentation)
(haskell-interactive-mode-eval-result (haskell-interactive-session) "\n"))))
(haskell-interactive-mode-prompt (haskell-interactive-session)))))
(defun haskell-interactive-mode-present-id (hash id)
"Generate a presentation for the current expression at ID."
;; See below for commentary of this statement.
(let ((p (haskell-interactive-process)))
(haskell-process-queue-without-filters
p "let _it = it")
(let* ((text (haskell-process-queue-sync-request
p
(format "Present.putStr (Present.encode (Present.fromJust (Present.present (Present.fromJust (Present.fromList [%s])) %s)))"
(mapconcat 'identity (mapcar 'number-to-string id) ",")
hash)))
(reply
(if (string-match "^*** " text)
'((rep nil))
(read text))))
;; Not necessary, but nice to restore it to the expression that
;; the user actually typed in.
(haskell-process-queue-without-filters
p "let it = _it")
reply)))
(defun haskell-presentation-present-slot (btn)
"The callback to evaluate the slot and present it in place of the button BTN."
(let ((id (button-get btn 'presentation-id))
(hash (button-get btn 'hash))
(parent-rep (button-get btn 'parent-rep))
(continuation (button-get btn 'continuation)))
(let ((point (point)))
(button-put btn 'invisible t)
(delete-region (button-start btn) (button-end btn))
(haskell-interactive-mode-insert-presentation
hash
(haskell-interactive-mode-present-id hash id)
parent-rep
continuation)
(when (> (point) point)
(goto-char (1+ point))))))
(defun haskell-interactive-mode-presentation-slot (hash slot parent-rep &optional continuation)
"Make a slot at point, pointing to ID."
(let ((type (car slot))
(id (cadr slot)))
(if (member (intern type) '(Integer Char Int Float Double))
(haskell-interactive-mode-insert-presentation
hash
(haskell-interactive-mode-present-id hash id)
parent-rep
continuation)
(haskell-interactive-mode-presentation-slot-button slot parent-rep continuation hash))))
(defun haskell-interactive-mode-presentation-slot-button (slot parent-rep continuation hash)
(let ((start (point))
(type (car slot))
(id (cadr slot)))
(insert (propertize type 'font-lock-face '(:height 0.8 :underline t :inherit font-lock-comment-face)))
(let ((button (make-text-button start (point)
:type 'haskell-presentation-slot-button)))
(button-put button 'hide-on-click t)
(button-put button 'presentation-id id)
(button-put button 'parent-rep parent-rep)
(button-put button 'continuation continuation)
(button-put button 'hash hash))))
(defun haskell-interactive-mode-insert-presentation (hash presentation &optional parent-rep continuation)
"Insert the presentation, hooking up buttons for each slot."
(let* ((rep (cadr (assoc 'rep presentation)))
(text (cadr (assoc 'text presentation)))
(slots (cadr (assoc 'slots presentation)))
(nullary (null slots)))
(cond
((string= "integer" rep)
(insert (propertize text 'font-lock-face 'font-lock-constant)))
((string= "floating" rep)
(insert (propertize text 'font-lock-face 'font-lock-constant)))
((string= "char" rep)
(insert (propertize
(if (string= "string" parent-rep)
(replace-regexp-in-string "^'\\(.+\\)'$" "\\1" text)
text)
'font-lock-face 'font-lock-string-face)))
((string= "tuple" rep)
(insert "(")
(let ((first t))
(cl-loop for slot in slots
do (unless first (insert ","))
do (haskell-interactive-mode-presentation-slot hash slot rep)
do (setq first nil)))
(insert ")"))
((string= "list" rep)
(if (null slots)
(if continuation
(progn (delete-char -1)
(delete-indentation))
(insert "[]"))
(let ((i 0))
(unless continuation
(insert "["))
(let ((start-column (current-column)))
(cl-loop for slot in slots
do (haskell-interactive-mode-presentation-slot
hash
slot
rep
(= i (1- (length slots))))
do (when (not (= i (1- (length slots))))
(insert "\n")
(indent-to (1- start-column))
(insert ","))
do (setq i (1+ i))))
(unless continuation
(insert "]")))))
((string= "string" rep)
(unless (string= "string" parent-rep)
(insert (propertize "\"" 'font-lock-face 'font-lock-string-face)))
(cl-loop for slot in slots
do (haskell-interactive-mode-presentation-slot hash slot rep))
(unless (string= "string" parent-rep)
(insert (propertize "\"" 'font-lock-face 'font-lock-string-face))))
((string= "alg" rep)
(when (and parent-rep
(not nullary)
(not (string= "list" parent-rep)))
(insert "("))
(let ((start-column (current-column)))
(insert (propertize text 'font-lock-face 'font-lock-type-face))
(cl-loop for slot in slots
do (insert "\n")
do (indent-to (+ 2 start-column))
do (haskell-interactive-mode-presentation-slot hash slot rep)))
(when (and parent-rep
(not nullary)
(not (string= "list" parent-rep)))
(insert ")")))
((string= "record" rep)
(let ((start-column (current-column)))
(insert (propertize text 'font-lock-face 'font-lock-type-face)
" { ")
(cl-loop for field in slots
do (insert "\n")
do (indent-to (+ 2 start-column))
do (let ((name (nth 0 field))
(slot (nth 1 field)))
(insert name " = ")
(haskell-interactive-mode-presentation-slot hash slot rep)))
(insert "\n")
(indent-to start-column)
(insert "}")))
((eq rep nil)
(insert (propertize "?" 'font-lock-face 'font-lock-warning)))
(t
(let ((err "Unable to present! This very likely means Emacs
is out of sync with the `present' package. You should make sure
they're both up to date, or report a bug."))
(insert err)
(error err))))))
(defun haskell-interactive-mode-setup-presentation (p)
"Setup the GHCi REPL for using presentations.
Using asynchronous queued commands as opposed to sync at this
stage, as sync would freeze up the UI a bit, and we actually
don't care when the thing completes as long as it's soonish."
;; Import dependencies under Present.* namespace
(haskell-process-queue-without-filters p "import qualified Data.Maybe as Present")
(haskell-process-queue-without-filters p "import qualified Data.ByteString.Lazy as Present")
(haskell-process-queue-without-filters p "import qualified Data.AttoLisp as Present")
(haskell-process-queue-without-filters p "import qualified Present.ID as Present")
(haskell-process-queue-without-filters p "import qualified Present as Present")
;; Make a dummy expression to avoid "Loading package" nonsense
(haskell-process-queue-without-filters
p "Present.present (Present.fromJust (Present.fromList [0])) ()"))
(defvar haskell-interactive-mode-presentation-hash 0
"Counter for the hash.")
(defun haskell-interactive-mode-presentation-hash ()
"Generate a presentation hash."
(format "_present_%s"
(setq haskell-interactive-mode-presentation-hash
(1+ haskell-interactive-mode-presentation-hash))))
(define-button-type 'haskell-presentation-slot-button
'action 'haskell-presentation-present-slot
'follow-link t
'help-echo "Click to expand…")
(defun haskell-interactive-mode-history-toggle (n)
"Toggle the history N items up or down."
(unless (null haskell-interactive-mode-history)
(setq haskell-interactive-mode-history-index
(mod (+ haskell-interactive-mode-history-index n)
(length haskell-interactive-mode-history)))
(unless (zerop haskell-interactive-mode-history-index)
(message "History item: %d" haskell-interactive-mode-history-index))
(haskell-interactive-mode-set-prompt
(nth haskell-interactive-mode-history-index
haskell-interactive-mode-history))))
(defun haskell-interactive-mode-set-prompt (p)
"Set (and overwrite) the current prompt."
(with-current-buffer (haskell-session-interactive-buffer (haskell-interactive-session))
(goto-char haskell-interactive-mode-prompt-start)
(delete-region (point) (point-max))
(insert p)))
(defun haskell-interactive-mode-history-previous (arg)
"Cycle backwards through input history."
(interactive "*p")
(when (haskell-interactive-at-prompt)
(if (not (zerop arg))
(haskell-interactive-mode-history-toggle arg)
(setq haskell-interactive-mode-history-index 0)
(haskell-interactive-mode-history-toggle 1))))
(defun haskell-interactive-mode-history-next (arg)
"Cycle forward through input history."
(interactive "*p")
(when (haskell-interactive-at-prompt)
(if (not (zerop arg))
(haskell-interactive-mode-history-toggle (- arg))
(setq haskell-interactive-mode-history-index 0)
(haskell-interactive-mode-history-toggle -1))))
(defun haskell-interactive-mode-prompt-previous ()
"Jump to the previous prompt."
(interactive)
(let ((prev-prompt-pos
(save-excursion
(beginning-of-line) ;; otherwise prompt at current line matches
(and (search-backward-regexp (haskell-interactive-prompt-regex) nil t)
(match-end 0)))))
(when prev-prompt-pos (goto-char prev-prompt-pos))))
(defun haskell-interactive-mode-prompt-next ()
"Jump to the next prompt."
(interactive)
(search-forward-regexp (haskell-interactive-prompt-regex) nil t))
(defun haskell-interactive-mode-clear ()
"Clear the screen and put any current input into the history."
(interactive)
(let ((session (haskell-interactive-session)))