emacs-orgmode@gnu.org archives
 help / color / mirror / code / Atom feed
blob 878821b146b2fff79bb87f47165e2cd924f72dcd 45225 bytes (raw)
name: lisp/org-src.el 	 # note: path name is non-authoritative(*)

   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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
 
;;; org-src.el --- Source code examples in Org       -*- lexical-binding: t; -*-
;;
;; Copyright (C) 2004-2020 Free Software Foundation, Inc.
;;
;; Author: Carsten Dominik <carsten at orgmode dot org>
;;	   Bastien Guerry <bzg@gnu.org>
;;         Dan Davison <davison at stats dot ox dot ac dot uk>
;; Keywords: outlines, hypermedia, calendar, wp
;; Homepage: https://orgmode.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 <https://www.gnu.org/licenses/>.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Commentary:

;; This file contains the code dealing with source code examples in
;; Org mode.

;;; Code:

(require 'cl-lib)
(require 'ob-comint)
(require 'org-macs)
(require 'org-compat)
(require 'org-keys)

(declare-function org-element-at-point "org-element" ())
(declare-function org-element-class "org-element" (datum &optional parent))
(declare-function org-element-context "org-element" (&optional element))
(declare-function org-element-lineage "org-element"
		  (blob &optional types with-self))
(declare-function org-element-property "org-element" (property element))
(declare-function org-element-type "org-element" (element))
(declare-function org-footnote-goto-definition "org-footnote"
		  (label &optional location))

(defvar org-inhibit-startup)

(defcustom org-edit-src-turn-on-auto-save nil
  "Non-nil means turn `auto-save-mode' on when editing a source block.
This will save the content of the source code editing buffer into
a newly created file, not the base buffer for this source block.

If you want to regularly save the base buffer instead of the source
code editing buffer, see `org-edit-src-auto-save-idle-delay' instead."
  :group 'org-edit-structure
  :version "24.4"
  :package-version '(Org . "8.0")
  :type 'boolean)

(defcustom org-edit-src-auto-save-idle-delay 0
  "Delay before saving a source code buffer back into its base buffer.
When a positive integer N, save after N seconds of idle time.
When 0 (the default), don't auto-save.

If you want to save the source code buffer itself, don't use this.
Check `org-edit-src-turn-on-auto-save' instead."
  :group 'org-edit-structure
  :version "24.4"
  :package-version '(Org . "8.0")
  :type 'integer)

(defcustom org-coderef-label-format "(ref:%s)"
  "The default coderef format.
This format string will be used to search for coderef labels in literal
examples (EXAMPLE and SRC blocks).  The format can be overwritten in
an individual literal example with the -l option, like

#+BEGIN_SRC pascal +n -r -l \"((%s))\"
...
#+END_SRC

If you want to use this for HTML export, make sure that the format does
not introduce special font-locking, and avoid the HTML special
characters `<', `>', and `&'.  The reason for this restriction is that
the labels are searched for only after htmlize has done its job."
  :group 'org-edit-structure ; FIXME this is not in the right group
  :type 'string)

(defcustom org-edit-fixed-width-region-mode 'artist-mode
  "The mode that should be used to edit fixed-width regions.
These are the regions where each line starts with a colon."
  :group 'org-edit-structure
  :type '(choice
	  (const artist-mode)
	  (const picture-mode)
	  (const fundamental-mode)
	  (function :tag "Other (specify)")))

(defcustom org-src-preserve-indentation nil
  "If non-nil preserve leading whitespace characters on export.
\\<org-mode-map>
If non-nil leading whitespace characters in source code blocks
are preserved on export, and when switching between the org
buffer and the language mode edit buffer.

When this variable is nil, after editing with `\\[org-edit-src-code]',
the minimum (across-lines) number of leading whitespace characters
are removed from all lines, and the code block is uniformly indented
according to the value of `org-edit-src-content-indentation'."
  :group 'org-edit-structure
  :type 'boolean)

(defcustom org-edit-src-content-indentation 2
  "Indentation for the content of a source code block.

This should be the number of spaces added to the indentation of the #+begin
line in order to compute the indentation of the block content after
editing it with `\\[org-edit-src-code]'.

It has no effect if `org-src-preserve-indentation' is non-nil."
  :group 'org-edit-structure
  :type 'integer
  :safe #'wholenump)

(defcustom org-edit-src-persistent-message t
  "Non-nil means show persistent exit help message while editing src examples.
The message is shown in the header-line, which will be created in the
first line of the window showing the editing buffer."
  :group 'org-edit-structure
  :type 'boolean)

(defcustom org-src-ask-before-returning-to-edit-buffer t
  "Non-nil means ask before switching to an existing edit buffer.
If nil, when `org-edit-src-code' is used on a block that already
has an active edit buffer, it will switch to that edit buffer
immediately; otherwise it will ask whether you want to return to
the existing edit buffer."
  :group 'org-edit-structure
  :version "24.4"
  :package-version '(Org . "8.0")
  :type 'boolean)

(defcustom org-src-window-setup 'reorganize-frame
  "How the source code edit buffer should be displayed.
Possible values for this option are:

current-window     Show edit buffer in the current window, keeping all other
                   windows.
split-window-below Show edit buffer below the current window, keeping all
                   other windows.
split-window-right Show edit buffer to the right of the current window,
                   keeping all other windows.
other-window       Use `switch-to-buffer-other-window' to display edit buffer.
reorganize-frame   Show only two windows on the current frame, the current
                   window and the edit buffer.
other-frame        Use `switch-to-buffer-other-frame' to display edit buffer.
                   Also, when exiting the edit buffer, kill that frame.

Values that modify the window layout (reorganize-frame, split-window-below,
split-window-right) will restore the layout after exiting the edit buffer."
  :group 'org-edit-structure
  :type '(choice
	  (const current-window)
	  (const split-window-below)
	  (const split-window-right)
	  (const other-frame)
	  (const other-window)
	  (const reorganize-frame)))

(defvar org-src-mode-hook nil
  "Hook run after Org switched a source code snippet to its Emacs mode.
\\<org-mode-map>
This hook will run:
- when editing a source code snippet with `\\[org-edit-special]'
- when formatting a source code snippet for export with htmlize.

You may want to use this hook for example to turn off `outline-minor-mode'
or similar things which you want to have when editing a source code file,
but which mess up the display of a snippet in Org exported files.")

(defcustom org-src-lang-modes
  '(("C" . c)
    ("C++" . c++)
    ("asymptote" . asy)
    ("bash" . sh)
    ("beamer" . latex)
    ("calc" . fundamental)
    ("cpp" . c++)
    ("ditaa" . artist)
    ("dot" . fundamental)
    ("elisp" . emacs-lisp)
    ("ocaml" . tuareg)
    ("screen" . shell-script)
    ("shell" . sh)
    ("sqlite" . sql))
  "Alist mapping languages to their major mode.

The key is the language name.  The value is the mode name, as
a string or a symbol, without the \"-mode\" suffix.

For many languages this is simple, but for language where this is
not the case, this variable provides a way to simplify things on
the user side.  For example, there is no `ocaml-mode' in Emacs,
but the mode to use is `tuareg-mode'."
  :group 'org-edit-structure
  :type '(repeat
	  (cons
	   (string "Language name")
	   (symbol "Major mode"))))

(defcustom org-src-block-faces nil
  "Alist of faces to be used for source-block.
Each element is a cell of the format

     (\"language\" FACE)

Where FACE is either a defined face or an anonymous face.

For instance, the following value would color the background of
emacs-lisp source blocks and python source blocks in purple and
green, respectability.

    \\='((\"emacs-lisp\" (:background \"#EEE2FF\"))
      (\"python\" (:background \"#e5ffb8\")))"
  :group 'org-edit-structure
  :type '(repeat (list (string :tag "language")
                       (choice
                        (face :tag "Face")
                        (sexp :tag "Anonymous face"))))
  :version "26.1"
  :package-version '(Org . "9.0"))

(defcustom org-src-tab-acts-natively nil
  "If non-nil, the effect of TAB in a code block is as if it were
issued in the language major mode buffer."
  :type 'boolean
  :version "24.1"
  :group 'org-babel)


\f
;;; Internal functions and variables

(defvar org-src--auto-save-timer nil
  "Idle Timer auto-saving remote editing buffers.")

(defvar-local org-src--allow-write-back t)
(put 'org-src--allow-write-back 'permanent-local t)

(defvar-local org-src--babel-info nil)
(put 'org-src--babel-info 'permanent-local t)

(defvar-local org-src--beg-marker nil)
(put 'org-src--beg-marker 'permanent-local t)

(defvar-local org-src--block-indentation nil)
(put 'org-src--block-indentation 'permanent-local t)

(defvar-local org-src--content-indentation nil)
(put 'org-src--content-indentation 'permanent-local t)

(defvar-local org-src--end-marker nil)
(put 'org-src--end-marker 'permanent-local t)

(defvar-local org-src--from-org-mode nil)
(put 'org-src--from-org-mode 'permanent-local t)

(defvar-local org-src--overlay nil)
(put 'org-src--overlay 'permanent-local t)

(defvar-local org-src--preserve-indentation nil)
(put 'org-src--preserve-indentation 'permanent-local t)

(defvar-local org-src--remote nil)
(put 'org-src--remote 'permanent-local t)

(defvar-local org-src--saved-temp-window-config nil)
(put 'org-src--saved-temp-window-config 'permanent-local t)

(defvar-local org-src--source-type nil
  "Type of element being edited, as a symbol.")
(put 'org-src--source-type 'permanent-local t)

(defvar-local org-src--tab-width nil
  "Contains `tab-width' value from Org source buffer.
However, if `indent-tabs-mode' is nil in that buffer, its value
is 0.")
(put 'org-src--tab-width 'permanent-local t)

(defvar-local org-src-source-file-name nil
  "File name associated to Org source buffer, or nil.")
(put 'org-src-source-file-name 'permanent-local t)

(defun org-src--construct-edit-buffer-name (org-buffer-name lang)
  "Construct the buffer name for a source editing buffer."
  (concat "*Org Src " org-buffer-name "[ " lang " ]*"))

(defun org-src--edit-buffer (beg end)
  "Return buffer editing area between BEG and END.
Return nil if there is no such buffer."
  (catch 'exit
    (dolist (b (buffer-list))
      (with-current-buffer b
	(and (org-src-edit-buffer-p)
	     (= beg org-src--beg-marker)
	     (eq (marker-buffer beg) (marker-buffer org-src--beg-marker))
	     (= end org-src--end-marker)
	     (eq (marker-buffer end) (marker-buffer org-src--end-marker))
	     (throw 'exit b))))))

(defun org-src--coordinates (pos beg end)
  "Return coordinates of POS relatively to BEG and END.
POS, BEG and END are buffer positions.  Return value is either
a cons cell (LINE . COLUMN) or symbol `end'.  See also
`org-src--goto-coordinates'."
  (if (>= pos end) 'end
    (org-with-wide-buffer
     (goto-char (max beg pos))
     (cons (count-lines beg (line-beginning-position))
	   ;; Column is relative to the end of line to avoid problems of
	   ;; comma escaping or colons appended in front of the line.
	   (- (current-column)
	      (progn (end-of-line) (current-column)))))))

(defun org-src--goto-coordinates (coord beg end)
  "Move to coordinates COORD relatively to BEG and END.
COORD are coordinates, as returned by `org-src--coordinates',
which see.  BEG and END are buffer positions."
  (goto-char
   (if (eq coord 'end) (max (1- end) beg)
     ;; If BEG happens to be located outside of the narrowed part of
     ;; the buffer, widen it first.
     (org-with-wide-buffer
      (goto-char beg)
      (forward-line (car coord))
      (end-of-line)
      (org-move-to-column (max (+ (current-column) (cdr coord)) 0))
      (point)))))

(defun org-src--contents-area (datum)
  "Return contents boundaries of DATUM.
DATUM is an element or object.  Return a list (BEG END CONTENTS)
where BEG and END are buffer positions and CONTENTS is a string."
  (let ((type (org-element-type datum)))
    (org-with-wide-buffer
     (cond
      ((eq type 'footnote-definition)
       (let* ((beg (progn
		     (goto-char (org-element-property :post-affiliated datum))
		     (search-forward "]")))
	      (end (or (org-element-property :contents-end datum) beg)))
	 (list beg end (buffer-substring-no-properties beg end))))
      ((eq type 'inline-src-block)
       (let ((beg (progn (goto-char (org-element-property :begin datum))
			 (search-forward "{" (line-end-position) t)))
	     (end (progn (goto-char (org-element-property :end datum))
			 (search-backward "}" (line-beginning-position) t))))
	 (list beg end (buffer-substring-no-properties beg end))))
      ((org-element-property :contents-begin datum)
       (let ((beg (org-element-property :contents-begin datum))
	     (end (org-element-property :contents-end datum)))
	 (list beg end (buffer-substring-no-properties beg end))))
      ((memq type '(example-block export-block src-block))
       (list (progn (goto-char (org-element-property :post-affiliated datum))
		    (line-beginning-position 2))
	     (progn (goto-char (org-element-property :end datum))
		    (skip-chars-backward " \r\t\n")
		    (line-beginning-position 1))
	     (org-element-property :value datum)))
      ((memq type '(fixed-width latex-environment table))
       (let ((beg (org-element-property :post-affiliated datum))
	     (end (progn (goto-char (org-element-property :end datum))
			 (skip-chars-backward " \r\t\n")
			 (line-beginning-position 2))))
	 (list beg
	       end
	       (if (eq type 'fixed-width) (org-element-property :value datum)
		 (buffer-substring-no-properties beg end)))))
      (t (error "Unsupported element or object: %s" type))))))

(defun org-src--make-source-overlay (beg end edit-buffer)
  "Create overlay between BEG and END positions and return it.
EDIT-BUFFER is the buffer currently editing area between BEG and
END."
  (let ((overlay (make-overlay beg end)))
    (overlay-put overlay 'face 'secondary-selection)
    (overlay-put overlay 'edit-buffer edit-buffer)
    (overlay-put overlay 'help-echo
		 "Click with mouse-1 to switch to buffer editing this segment")
    (overlay-put overlay 'face 'secondary-selection)
    (overlay-put overlay 'keymap
		 (let ((map (make-sparse-keymap)))
		   (define-key map [mouse-1] 'org-edit-src-continue)
		   map))
    (let ((read-only
	   (list
	    (lambda (&rest _)
	      (user-error
	       "Cannot modify an area being edited in a dedicated buffer")))))
      (overlay-put overlay 'modification-hooks read-only)
      (overlay-put overlay 'insert-in-front-hooks read-only)
      (overlay-put overlay 'insert-behind-hooks read-only))
    overlay))

(defun org-src--remove-overlay ()
  "Remove overlay from current source buffer."
  (when (overlayp org-src--overlay) (delete-overlay org-src--overlay)))

(defun org-src--on-datum-p (datum)
  "Non-nil when point is on DATUM.
DATUM is an element or an object.  Consider blank lines or white
spaces after it as being outside."
  (and (>= (point) (org-element-property :begin datum))
       (<= (point)
	   (org-with-wide-buffer
	    (goto-char (org-element-property :end datum))
	    (skip-chars-backward " \r\t\n")
	    (if (eq (org-element-class datum) 'element)
		(line-end-position)
	      (point))))))

(defun org-src--contents-for-write-back ()
  "Return buffer contents in a format appropriate for write back.
Assume point is in the corresponding edit buffer."
  (let ((indentation-offset
	 (if org-src--preserve-indentation 0
	   (+ (or org-src--block-indentation 0)
	      (if (memq org-src--source-type '(example-block src-block))
		  org-src--content-indentation
		0))))
	(use-tabs? (and (> org-src--tab-width 0) t))
	(source-tab-width org-src--tab-width)
	(contents (org-with-wide-buffer (buffer-string)))
	(write-back org-src--allow-write-back))
    (with-temp-buffer
      ;; Reproduce indentation parameters from source buffer.
      (setq indent-tabs-mode use-tabs?)
      (when (> source-tab-width 0) (setq tab-width source-tab-width))
      ;; Apply WRITE-BACK function on edit buffer contents.
      (insert (org-no-properties contents))
      (goto-char (point-min))
      (when (functionp write-back) (save-excursion (funcall write-back)))
      ;; Add INDENTATION-OFFSET to every non-empty line in buffer,
      ;; unless indentation is meant to be preserved.
      (when (> indentation-offset 0)
	(while (not (eobp))
	  (skip-chars-forward " \t")
	  (unless (eolp)		;ignore blank lines
	    (let ((i (current-column)))
	      (delete-region (line-beginning-position) (point))
	      (indent-to (+ i indentation-offset))))
	  (forward-line)))
      (buffer-string))))

(defun org-src--edit-element
    (datum name &optional initialize write-back contents remote)
  "Edit DATUM contents in a dedicated buffer NAME.

INITIALIZE is a function to call upon creating the buffer.

When WRITE-BACK is non-nil, assume contents will replace original
region.  Moreover, if it is a function, apply it in the edit
buffer, from point min, before returning the contents.

When CONTENTS is non-nil, display them in the edit buffer.
Otherwise, show DATUM contents as specified by
`org-src--contents-area'.

When REMOTE is non-nil, do not try to preserve point or mark when
moving from the edit area to the source.

Leave point in edit buffer."
  (when (memq org-src-window-setup '(reorganize-frame
				     split-window-below
				     split-window-right))
    (setq org-src--saved-temp-window-config (current-window-configuration)))
  (let* ((area (org-src--contents-area datum))
	 (beg (copy-marker (nth 0 area)))
	 (end (copy-marker (nth 1 area) t))
	 (old-edit-buffer (org-src--edit-buffer beg end))
	 (contents (or contents (nth 2 area))))
    (if (and old-edit-buffer
	     (or (not org-src-ask-before-returning-to-edit-buffer)
		 (y-or-n-p "Return to existing edit buffer ([n] will revert changes)? ")))
	;; Move to existing buffer.
	(org-src-switch-to-buffer old-edit-buffer 'return)
      ;; Discard old edit buffer.
      (when old-edit-buffer
	(with-current-buffer old-edit-buffer (org-src--remove-overlay))
	(kill-buffer old-edit-buffer))
      (let* ((org-mode-p (derived-mode-p 'org-mode))
	     (source-file-name (buffer-file-name (buffer-base-buffer)))
	     (source-tab-width (if indent-tabs-mode tab-width 0))
	     (type (org-element-type datum))
	     (block-ind (org-with-point-at (org-element-property :begin datum)
			  (current-indentation)))
	     (content-ind org-edit-src-content-indentation)
	     (preserve-ind
	      (and (memq type '(example-block src-block))
		   (or (org-element-property :preserve-indent datum)
		       org-src-preserve-indentation)))
	     ;; Store relative positions of mark (if any) and point
	     ;; within the edited area.
	     (point-coordinates (and (not remote)
				     (org-src--coordinates (point) beg end)))
	     (mark-coordinates (and (not remote)
				    (org-region-active-p)
				    (let ((m (mark)))
				      (and (>= m beg) (>= end m)
					   (org-src--coordinates m beg end)))))
	     ;; Generate a new edit buffer.
	     (buffer (generate-new-buffer name))
	     ;; Add an overlay on top of source.
	     (overlay (org-src--make-source-overlay beg end buffer)))
	;; Switch to edit buffer.
	(org-src-switch-to-buffer buffer 'edit)
	;; Insert contents.
	(insert contents)
	(remove-text-properties (point-min) (point-max)
				'(display nil invisible nil intangible nil))
	(unless preserve-ind (org-do-remove-indentation))
	(set-buffer-modified-p nil)
	(setq buffer-file-name nil)
	;; Initialize buffer.
	(when (functionp initialize)
	  (let ((org-inhibit-startup t))
	    (condition-case e
		(funcall initialize)
	      (error (message "Initialization fails with: %S"
			      (error-message-string e))))))
	;; Transmit buffer-local variables for exit function.  It must
	;; be done after initializing major mode, as this operation
	;; may reset them otherwise.
	(setq org-src--tab-width source-tab-width)
	(setq org-src--from-org-mode org-mode-p)
	(setq org-src--beg-marker beg)
	(setq org-src--end-marker end)
	(setq org-src--remote remote)
	(setq org-src--source-type type)
	(setq org-src--block-indentation block-ind)
	(setq org-src--content-indentation content-ind)
	(setq org-src--preserve-indentation preserve-ind)
	(setq org-src--overlay overlay)
	(setq org-src--allow-write-back write-back)
	(setq org-src-source-file-name source-file-name)
	;; Start minor mode.
	(org-src-mode)
	;; Move mark and point in edit buffer to the corresponding
	;; location.
	(if remote
	    (progn
	      ;; Put point at first non read-only character after
	      ;; leading blank.
	      (goto-char
	       (or (text-property-any (point-min) (point-max) 'read-only nil)
		   (point-max)))
	      (skip-chars-forward " \r\t\n"))
	  ;; Set mark and point.
	  (when mark-coordinates
	    (org-src--goto-coordinates mark-coordinates (point-min) (point-max))
	    (push-mark (point) 'no-message t)
	    (setq deactivate-mark nil))
	  (org-src--goto-coordinates
	   point-coordinates (point-min) (point-max)))))))


\f
;;; Fontification of source blocks

(defun org-src-font-lock-fontify-block (lang start end)
  "Fontify code block.
This function is called by emacs automatic fontification, as long
as `org-src-fontify-natively' is non-nil."
  (let ((lang-mode (org-src-get-lang-mode lang)))
    (when (fboundp lang-mode)
      (let ((string (buffer-substring-no-properties start end))
	    (modified (buffer-modified-p))
	    (org-buffer (current-buffer)))
	(remove-text-properties start end '(face nil))
	(with-current-buffer
	    (get-buffer-create
	     (format " *org-src-fontification:%s*" lang-mode))
	  (let ((inhibit-modification-hooks nil))
	    (erase-buffer)
	    ;; Add string and a final space to ensure property change.
	    (insert string " "))
	  (unless (eq major-mode lang-mode) (funcall lang-mode))
	  (org-font-lock-ensure)
	  (let ((pos (point-min)) next)
	    (while (setq next (next-property-change pos))
	      ;; Handle additional properties from font-lock, so as to
	      ;; preserve, e.g., composition.
	      (dolist (prop (cons 'face font-lock-extra-managed-props))
		(let ((new-prop (get-text-property pos prop)))
		  (put-text-property
		   (+ start (1- pos)) (1- (+ start next)) prop new-prop
		   org-buffer)))
	      (setq pos next))))
	;; Add Org faces.
	(let ((src-face (nth 1 (assoc-string lang org-src-block-faces t))))
          (when (or (facep src-face) (listp src-face))
            (font-lock-append-text-property start end 'face src-face))
	  (font-lock-append-text-property start end 'face 'org-block))
	(add-text-properties
	 start end
	 '(font-lock-fontified t fontified t font-lock-multiline t))
	(set-buffer-modified-p modified)))))

\f
;;; Escape contents

(defun org-escape-code-in-region (beg end)
  "Escape lines between BEG and END.
Escaping happens when a line starts with \"*\", \"#+\", \",*\" or
\",#+\" by appending a comma to it."
  (interactive "r")
  (save-excursion
    (goto-char end)
    (while (re-search-backward "^[ \t]*\\(,*\\(?:\\*\\|#\\+\\)\\)" beg t)
      (save-excursion (replace-match ",\\1" nil nil nil 1)))))

(defun org-escape-code-in-string (s)
  "Escape lines in string S.
Escaping happens when a line starts with \"*\", \"#+\", \",*\" or
\",#+\" by appending a comma to it."
  (replace-regexp-in-string "^[ \t]*\\(,*\\(?:\\*\\|#\\+\\)\\)" ",\\1"
			    s nil nil 1))

(defun org-unescape-code-in-region (beg end)
  "Un-escape lines between BEG and END.
Un-escaping happens by removing the first comma on lines starting
with \",*\", \",#+\", \",,*\" and \",,#+\"."
  (interactive "r")
  (save-excursion
    (goto-char end)
    (while (re-search-backward "^[ \t]*,*\\(,\\)\\(?:\\*\\|#\\+\\)" beg t)
      (save-excursion (replace-match "" nil nil nil 1)))))

(defun org-unescape-code-in-string (s)
  "Un-escape lines in string S.
Un-escaping happens by removing the first comma on lines starting
with \",*\", \",#+\", \",,*\" and \",,#+\"."
  (replace-regexp-in-string
   "^[ \t]*,*\\(,\\)\\(?:\\*\\|#\\+\\)" "" s nil nil 1))


\f
;;; Org src minor mode

(defvar org-src-mode-map
  (let ((map (make-sparse-keymap)))
    (define-key map "\C-c'" 'org-edit-src-exit)
    (define-key map "\C-c\C-k" 'org-edit-src-abort)
    (define-key map "\C-x\C-s" 'org-edit-src-save)
    map))

(define-minor-mode org-src-mode
  "Minor mode for language major mode buffers generated by Org.
\\<org-mode-map>
This minor mode is turned on in two situations:
  - when editing a source code snippet with `\\[org-edit-special]'
  - when formatting a source code snippet for export with htmlize.

\\{org-src-mode-map}

See also `org-src-mode-hook'."
  nil " OrgSrc" nil
  (when org-edit-src-persistent-message
    (setq header-line-format
	  (substitute-command-keys
	   (if org-src--allow-write-back
	       "Edit, then exit with `\\[org-edit-src-exit]' or abort with \
`\\[org-edit-src-abort]'"
	     "Exit with `\\[org-edit-src-exit]' or abort with \
`\\[org-edit-src-abort]'"))))
  ;; Possibly activate various auto-save features (for the edit buffer
  ;; or the source buffer).
  (when org-edit-src-turn-on-auto-save
    (setq buffer-auto-save-file-name
	  (concat (make-temp-name "org-src-")
		  (format-time-string "-%Y-%d-%m")
		  ".txt")))
  (unless (or org-src--auto-save-timer
	      (= 0 org-edit-src-auto-save-idle-delay))
    (setq org-src--auto-save-timer
	  (run-with-idle-timer
	   org-edit-src-auto-save-idle-delay t
	   (lambda ()
	     (save-excursion
	       (let (edit-flag)
		 (dolist (b (buffer-list))
		   (with-current-buffer b
		     (when (org-src-edit-buffer-p)
		       (unless edit-flag (setq edit-flag t))
		       (when (buffer-modified-p) (org-edit-src-save)))))
		 (unless edit-flag
		   (cancel-timer org-src--auto-save-timer)
		   (setq org-src--auto-save-timer nil)))))))))

(defun org-src-mode-configure-edit-buffer ()
  "Configure the src edit buffer."
  (when (bound-and-true-p org-src--from-org-mode)
    (add-hook 'kill-buffer-hook #'org-src--remove-overlay nil 'local)
    (if (bound-and-true-p org-src--allow-write-back)
	(progn
	  (setq buffer-offer-save t)
	  (setq write-contents-functions '(org-edit-src-save)))
      (setq buffer-read-only t))))

(add-hook 'org-src-mode-hook #'org-src-mode-configure-edit-buffer)


\f
;;; Babel related functions

(defun org-src-associate-babel-session (info)
  "Associate edit buffer with comint session."
  (interactive)
  (let ((session (cdr (assq :session (nth 2 info)))))
    (and session (not (string= session "none"))
	 (org-babel-comint-buffer-livep session)
	 (let ((f (intern (format "org-babel-%s-associate-session"
                                  (nth 0 info)))))
           (and (fboundp f) (funcall f session))))))

(defun org-src-babel-configure-edit-buffer ()
  (when org-src--babel-info
    (org-src-associate-babel-session org-src--babel-info)))

(add-hook 'org-src-mode-hook #'org-src-babel-configure-edit-buffer)

\f
;;; Public API

(defmacro org-src-do-at-code-block (&rest body)
  "Execute BODY from an edit buffer in the Org mode buffer."
  (declare (debug (body)))
  `(let ((beg-marker org-src--beg-marker))
     (when beg-marker
       (with-current-buffer (marker-buffer beg-marker)
	 (goto-char beg-marker)
	 ,@body))))

(defun org-src-do-key-sequence-at-code-block (&optional key)
  "Execute key sequence at code block in the source Org buffer.
The command bound to KEY in the Org-babel key map is executed
remotely with point temporarily at the start of the code block in
the Org buffer.

This command is not bound to a key by default, to avoid conflicts
with language major mode bindings.  To bind it to C-c @ in all
language major modes, you could use

  (add-hook \\='org-src-mode-hook
            (lambda () (define-key org-src-mode-map \"\\C-c@\"
                    \\='org-src-do-key-sequence-at-code-block)))

In that case, for example, C-c @ t issued in code edit buffers
would tangle the current Org code block, C-c @ e would execute
the block and C-c @ h would display the other available
Org-babel commands."
  (interactive "kOrg-babel key: ")
  (if (equal key (kbd "C-g")) (keyboard-quit)
    (org-edit-src-save)
    (org-src-do-at-code-block
     (call-interactively (lookup-key org-babel-map key)))))

(defun org-src-get-lang-mode (lang)
  "Return major mode that should be used for LANG.
LANG is a string, and the returned major mode is a symbol."
  (intern
   (concat
    (let ((l (or (cdr (assoc lang org-src-lang-modes)) lang)))
      (if (symbolp l) (symbol-name l) l))
    "-mode")))

(defun org-src-edit-buffer-p (&optional buffer)
  "Non-nil when current buffer is a source editing buffer.
If BUFFER is non-nil, test it instead."
  (let ((buffer (org-base-buffer (or buffer (current-buffer)))))
    (and (buffer-live-p buffer)
	 (local-variable-p 'org-src--beg-marker buffer)
	 (local-variable-p 'org-src--end-marker buffer))))

(defun org-src-source-buffer ()
  "Return source buffer edited in current buffer.
Raise an error when current buffer is not a source editing buffer."
  (unless (org-src-edit-buffer-p) (error "Not in a source buffer"))
  (or (marker-buffer org-src--beg-marker)
      (error "No source buffer available for current editing session")))

(defun org-src-source-type ()
  "Return type of element edited in current buffer.
Raise an error when current buffer is not a source editing buffer."
  (unless (org-src-edit-buffer-p) (error "Not in a source buffer"))
  org-src--source-type)

(defun org-src-switch-to-buffer (buffer context)
  (pcase org-src-window-setup
    (`current-window (pop-to-buffer-same-window buffer))
    (`other-window
     (switch-to-buffer-other-window buffer))
    (`split-window-below
     (if (eq context 'exit)
	 (delete-window)
       (select-window (split-window-vertically)))
     (pop-to-buffer-same-window buffer))
    (`split-window-right
     (if (eq context 'exit)
	 (delete-window)
       (select-window (split-window-horizontally)))
     (pop-to-buffer-same-window buffer))
    (`other-frame
     (pcase context
       (`exit
	(let ((frame (selected-frame)))
	  (switch-to-buffer-other-frame buffer)
	  (delete-frame frame)))
       (`save
	(kill-buffer (current-buffer))
	(pop-to-buffer-same-window buffer))
       (_ (switch-to-buffer-other-frame buffer))))
    (`reorganize-frame
     (when (eq context 'edit) (delete-other-windows))
     (org-switch-to-buffer-other-window buffer)
     (when (eq context 'exit) (delete-other-windows)))
    (`switch-invisibly (set-buffer buffer))
    (_
     (message "Invalid value %s for `org-src-window-setup'"
	      org-src-window-setup)
     (pop-to-buffer-same-window buffer))))

(defun org-src-coderef-format (&optional element)
  "Return format string for block at point.

When optional argument ELEMENT is provided, use that block.
Otherwise, assume point is either at a source block, at an
example block.

If point is in an edit buffer, retrieve format string associated
to the remote source block."
  (cond
   ((and element (org-element-property :label-fmt element)))
   ((org-src-edit-buffer-p) (org-src-do-at-code-block (org-src-coderef-format)))
   ((org-element-property :label-fmt (org-element-at-point)))
   (t org-coderef-label-format)))

(defun org-src-coderef-regexp (fmt &optional label)
  "Return regexp matching a coderef format string FMT.

When optional argument LABEL is non-nil, match coderef for that
label only.

Match group 1 contains the full coderef string with surrounding
white spaces.  Match group 2 contains the same string without any
surrounding space.  Match group 3 contains the label.

A coderef format regexp can only match at the end of a line."
  (format "\\([ \t]*\\(%s\\)[ \t]*\\)$"
	  (replace-regexp-in-string
	   "%s"
	   (if label (regexp-quote label) "\\([-a-zA-Z0-9_][-a-zA-Z0-9_ ]*\\)")
	   (regexp-quote fmt)
	   nil t)))

(defun org-edit-footnote-reference ()
  "Edit definition of footnote reference at point."
  (interactive)
  (let* ((context (org-element-context))
	 (label (org-element-property :label context)))
    (unless (and (eq (org-element-type context) 'footnote-reference)
		 (org-src--on-datum-p context))
      (user-error "Not on a footnote reference"))
    (unless label (user-error "Cannot edit remotely anonymous footnotes"))
    (let* ((definition (org-with-wide-buffer
			(org-footnote-goto-definition label)
			(backward-char)
			(org-element-context)))
	   (inline? (eq 'footnote-reference (org-element-type definition)))
	   (contents
	    (org-with-wide-buffer
	     (buffer-substring-no-properties
	      (or (org-element-property :post-affiliated definition)
		  (org-element-property :begin definition))
	      (cond
	       (inline? (1+ (org-element-property :contents-end definition)))
	       ((org-element-property :contents-end definition))
	       (t (goto-char (org-element-property :post-affiliated definition))
		  (line-end-position)))))))
      (add-text-properties
       0
       (progn (string-match (if inline? "\\`\\[fn:.*?:" "\\`.*?\\]") contents)
	      (match-end 0))
       '(read-only "Cannot edit footnote label" front-sticky t rear-nonsticky t)
       contents)
      (when inline?
	(let ((l (length contents)))
	  (add-text-properties
	   (1- l) l
	   '(read-only "Cannot edit past footnote reference"
		       front-sticky nil rear-nonsticky nil)
	   contents)))
      (org-src--edit-element
       definition
       (format "*Edit footnote [%s]*" label)
       (let ((source (current-buffer)))
	 (lambda ()
	   (org-mode)
	   (org-clone-local-variables source)))
       (lambda ()
	 (if (not inline?) (delete-region (point) (search-forward "]"))
	   (delete-region (point) (search-forward ":" nil t 2))
	   (delete-region (1- (point-max)) (point-max))
	   (when (re-search-forward "\n[ \t]*\n" nil t)
	     (user-error "Inline definitions cannot contain blank lines"))
	   ;; If footnote reference belongs to a table, make sure to
	   ;; remove any newline characters in order to preserve
	   ;; table's structure.
	   (when (org-element-lineage definition '(table-cell))
	     (while (search-forward "\n" nil t) (replace-match "")))))
       contents
       'remote))
    ;; Report success.
    t))

(defun org-edit-table.el ()
  "Edit \"table.el\" table at point.
\\<org-src-mode-map>
A new buffer is created and the table is copied into it.  Then
the table is recognized with `table-recognize'.  When done
editing, exit with `\\[org-edit-src-exit]'.  The edited text will \
then replace
the area in the Org mode buffer.

Throw an error when not at such a table."
  (interactive)
  (let ((element (org-element-at-point)))
    (unless (and (eq (org-element-type element) 'table)
		 (eq (org-element-property :type element) 'table.el)
		 (org-src--on-datum-p element))
      (user-error "Not in a table.el table"))
    (org-src--edit-element
     element
     (org-src--construct-edit-buffer-name (buffer-name) "Table")
     #'text-mode t)
    (when (bound-and-true-p flyspell-mode) (flyspell-mode -1))
    (table-recognize)
    t))

(defun org-edit-latex-environment ()
  "Edit LaTeX environment at point.
\\<org-src-mode-map>
The LaTeX environment is copied into a new buffer.  Major mode is
set to the one associated to \"latex\" in `org-src-lang-modes',
or to `latex-mode' if there is none.

When done, exit with `\\[org-edit-src-exit]'.  The edited text \
will then replace
the LaTeX environment in the Org mode buffer."
  (interactive)
  (let ((element (org-element-at-point)))
    (unless (and (eq (org-element-type element) 'latex-environment)
		 (org-src--on-datum-p element))
      (user-error "Not in a LaTeX environment"))
    (org-src--edit-element
     element
     (org-src--construct-edit-buffer-name (buffer-name) "LaTeX environment")
     (org-src-get-lang-mode "latex")
     t)
    t))

(defun org-edit-export-block ()
  "Edit export block at point.
\\<org-src-mode-map>
A new buffer is created and the block is copied into it, and the
buffer is switched into an appropriate major mode.  See also
`org-src-lang-modes'.

When done, exit with `\\[org-edit-src-exit]'.  The edited text \
will then replace
the area in the Org mode buffer.

Throw an error when not at an export block."
  (interactive)
  (let ((element (org-element-at-point)))
    (unless (and (eq (org-element-type element) 'export-block)
		 (org-src--on-datum-p element))
      (user-error "Not in an export block"))
    (let* ((type (downcase (or (org-element-property :type element)
			       ;; Missing export-block type.  Fallback
			       ;; to default mode.
			       "fundamental")))
	   (mode (org-src-get-lang-mode type)))
      (unless (functionp mode) (error "No such language mode: %s" mode))
      (org-src--edit-element
       element
       (org-src--construct-edit-buffer-name (buffer-name) type)
       mode
       (lambda () (org-escape-code-in-region (point-min) (point-max)))))
    t))

(defun org-edit-src-code (&optional code edit-buffer-name)
  "Edit the source or example block at point.
\\<org-src-mode-map>
The code is copied to a separate buffer and the appropriate mode
is turned on.  When done, exit with `\\[org-edit-src-exit]'.  This \
will remove the
original code in the Org buffer, and replace it with the edited
version.  See `org-src-window-setup' to configure the display of
windows containing the Org buffer and the code buffer.

When optional argument CODE is a string, edit it in a dedicated
buffer instead.

When optional argument EDIT-BUFFER-NAME is non-nil, use it as the
name of the sub-editing buffer."
  (interactive)
  (let* ((element (org-element-at-point))
	 (type (org-element-type element)))
    (unless (and (memq type '(example-block src-block))
		 (org-src--on-datum-p element))
      (user-error "Not in a source or example block"))
    (let* ((lang
	    (if (eq type 'src-block) (org-element-property :language element)
	      "example"))
	   (lang-f (and (eq type 'src-block) (org-src-get-lang-mode lang)))
	   (babel-info (and (eq type 'src-block)
			    (org-babel-get-src-block-info 'light)))
	   deactivate-mark)
      (when (and (eq type 'src-block) (not (functionp lang-f)))
	(error "No such language mode: %s" lang-f))
      (org-src--edit-element
       element
       (or edit-buffer-name
	   (org-src--construct-edit-buffer-name (buffer-name) lang))
       lang-f
       (and (null code)
	    (lambda () (org-escape-code-in-region (point-min) (point-max))))
       (and code (org-unescape-code-in-string code)))
      ;; Finalize buffer.
      (setq-local org-coderef-label-format
		  (or (org-element-property :label-fmt element)
		      org-coderef-label-format))
      (when (eq type 'src-block)
	(setq org-src--babel-info babel-info)
	(let ((edit-prep-func (intern (concat "org-babel-edit-prep:" lang))))
	  (when (fboundp edit-prep-func)
	    (funcall edit-prep-func babel-info))))
      t)))

(defun org-edit-inline-src-code ()
  "Edit inline source code at point."
  (interactive)
  (let ((context (org-element-context)))
    (unless (and (eq (org-element-type context) 'inline-src-block)
		 (org-src--on-datum-p context))
      (user-error "Not on inline source code"))
    (let* ((lang (org-element-property :language context))
	   (lang-f (org-src-get-lang-mode lang))
	   (babel-info (org-babel-get-src-block-info 'light))
	   deactivate-mark)
      (unless (functionp lang-f) (error "No such language mode: %s" lang-f))
      (org-src--edit-element
       context
       (org-src--construct-edit-buffer-name (buffer-name) lang)
       lang-f
       (lambda ()
	 ;; Inline source blocks are limited to one line.
	 (while (re-search-forward "\n[ \t]*" nil t) (replace-match " "))
	 ;; Trim contents.
	 (goto-char (point-min))
	 (skip-chars-forward " \t")
	 (delete-region (point-min) (point))
	 (goto-char (point-max))
	 (skip-chars-backward " \t")
	 (delete-region (point) (point-max))))
      ;; Finalize buffer.
      (setq org-src--babel-info babel-info)
      (setq org-src--preserve-indentation t)
      (let ((edit-prep-func (intern (concat "org-babel-edit-prep:" lang))))
	(when (fboundp edit-prep-func) (funcall edit-prep-func babel-info)))
      ;; Return success.
      t)))

(defun org-edit-fixed-width-region ()
  "Edit the fixed-width ASCII drawing at point.
\\<org-src-mode-map>
This must be a region where each line starts with a colon
followed by a space or a newline character.

A new buffer is created and the fixed-width region is copied into
it, and the buffer is switched into the major mode defined in
`org-edit-fixed-width-region-mode', which see.

When done, exit with `\\[org-edit-src-exit]'.  The edited text \
will then replace
the area in the Org mode buffer."
  (interactive)
  (let ((element (org-element-at-point)))
    (unless (and (eq (org-element-type element) 'fixed-width)
		 (org-src--on-datum-p element))
      (user-error "Not in a fixed-width area"))
    (org-src--edit-element
     element
     (org-src--construct-edit-buffer-name (buffer-name) "Fixed Width")
     org-edit-fixed-width-region-mode
     (lambda () (while (not (eobp)) (insert ": ") (forward-line))))
    ;; Return success.
    t))

(defun org-edit-src-abort ()
  "Abort editing of the src code and return to the Org buffer."
  (interactive)
  (let (org-src--allow-write-back) (org-edit-src-exit)))

(defun org-edit-src-continue (e)
  "Unconditionally return to buffer editing area under point.
Throw an error if there is no such buffer."
  (interactive "e")
  (mouse-set-point e)
  (let ((buf (get-char-property (point) 'edit-buffer)))
    (if buf (org-src-switch-to-buffer buf 'continue)
      (user-error "No sub-editing buffer for area at point"))))

(defun org-edit-src-save ()
  "Save parent buffer with current state source-code buffer."
  (interactive)
  (unless (org-src-edit-buffer-p) (user-error "Not in a sub-editing buffer"))
  (set-buffer-modified-p nil)
  (let ((edited-code (org-src--contents-for-write-back))
	(beg org-src--beg-marker)
	(end org-src--end-marker)
	(overlay org-src--overlay))
    (with-current-buffer (org-src-source-buffer)
      (undo-boundary)
      (goto-char beg)
      ;; Temporarily disable read-only features of OVERLAY in order to
      ;; insert new contents.
      (delete-overlay overlay)
      (delete-region beg end)
      (let ((expecting-bol (bolp)))
	(insert edited-code)
	(when (and expecting-bol (not (bolp))) (insert "\n")))
      (save-buffer)
      (move-overlay overlay beg (point))))
  ;; `write-contents-functions' requires the function to return
  ;; a non-nil value so that other functions are not called.
  t)

(defun org-edit-src-exit ()
  "Kill current sub-editing buffer and return to source buffer."
  (interactive)
  (unless (org-src-edit-buffer-p) (error "Not in a sub-editing buffer"))
  (let* ((beg org-src--beg-marker)
	 (end org-src--end-marker)
	 (write-back org-src--allow-write-back)
	 (remote org-src--remote)
	 (coordinates (and (not remote)
			   (org-src--coordinates (point) 1 (point-max))))
	 (code (and write-back (org-src--contents-for-write-back))))
    (set-buffer-modified-p nil)
    ;; Switch to source buffer.  Kill sub-editing buffer.
    (let ((edit-buffer (current-buffer))
	  (source-buffer (marker-buffer beg)))
      (unless source-buffer (error "Source buffer disappeared.  Aborting"))
      (org-src-switch-to-buffer source-buffer 'exit)
      (kill-buffer edit-buffer))
    ;; Insert modified code.  Ensure it ends with a newline character.
    (org-with-wide-buffer
     (when (and write-back (not (equal (buffer-substring beg end) code)))
       (undo-boundary)
       (goto-char beg)
       (delete-region beg end)
       (let ((expecting-bol (bolp)))
	 (insert code)
	 (when (and expecting-bol (not (bolp))) (insert "\n")))))
    ;; If we are to return to source buffer, put point at an
    ;; appropriate location.  In particular, if block is hidden, move
    ;; to the beginning of the block opening line.
    (unless remote
      (goto-char beg)
      (cond
       ;; Block is hidden; move at start of block.
       ((cl-some (lambda (o) (eq (overlay-get o 'invisible) 'org-hide-block))
		 (overlays-at (point)))
	(beginning-of-line 0))
       (write-back (org-src--goto-coordinates coordinates beg end))))
    ;; Clean up left-over markers and restore window configuration.
    (set-marker beg nil)
    (set-marker end nil)
    (when org-src--saved-temp-window-config
      (unwind-protect
	  (set-window-configuration org-src--saved-temp-window-config)
	(setq org-src--saved-temp-window-config nil)))))

(provide 'org-src)

;;; org-src.el ends here

debug log:

solving 878821b14 ...
found 878821b14 in https://git.savannah.gnu.org/cgit/emacs/org-mode.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).