unofficial mirror of notmuch@notmuchmail.org
 help / color / mirror / code / Atom feed
blob 2b0820e59f4c6fae0a24dc8bdfffef9f29180f53 54691 bytes (raw)
name: emacs/notmuch-show.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
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
 
;; notmuch-show.el --- displaying notmuch forests.
;;
;; Copyright © Carl Worth
;; Copyright © David Edmondson
;;
;; This file is part of Notmuch.
;;
;; Notmuch 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.
;;
;; Notmuch 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 Notmuch.  If not, see <http://www.gnu.org/licenses/>.
;;
;; Authors: Carl Worth <cworth@cworth.org>
;;          David Edmondson <dme@dme.org>

(eval-when-compile (require 'cl))
(require 'mm-view)
(require 'message)
(require 'mm-decode)
(require 'mailcap)
(require 'icalendar)
(require 'goto-addr)

(require 'notmuch-lib)
(require 'notmuch-query)
(require 'notmuch-wash)
(require 'notmuch-mua)
(require 'notmuch-crypto)

(declare-function notmuch-call-notmuch-process "notmuch" (&rest args))
(declare-function notmuch-fontify-headers "notmuch" nil)
(declare-function notmuch-select-tag-with-completion "notmuch" (prompt &rest search-terms))
(declare-function notmuch-search-show-thread "notmuch" nil)

(defcustom notmuch-message-headers '("Subject" "To" "Cc" "Date")
  "Headers that should be shown in a message, in this order.

For an open message, all of these headers will be made visible
according to `notmuch-message-headers-visible' or can be toggled
with `notmuch-show-toggle-headers'. For a closed message, only
the first header in the list will be visible."
  :group 'notmuch
  :type '(repeat string))

(defcustom notmuch-message-headers-visible t
  "Should the headers be visible by default?

If this value is non-nil, then all of the headers defined in
`notmuch-message-headers' will be visible by default in the display
of each message. Otherwise, these headers will be hidden and
`notmuch-show-toggle-headers' can be used to make the visible for
any given message."
  :group 'notmuch
  :type 'boolean)

(defcustom notmuch-show-relative-dates t
  "Display relative dates in the message summary line."
  :group 'notmuch
  :type 'boolean)

(defvar notmuch-show-markup-headers-hook '(notmuch-show-colour-headers)
  "A list of functions called to decorate the headers listed in
`notmuch-message-headers'.")

(defcustom notmuch-show-hook nil
  "Functions called after populating a `notmuch-show' buffer."
  :group 'notmuch
  :type 'hook)

(defcustom notmuch-show-insert-text/plain-hook '(notmuch-wash-excerpt-citations)
  "Functions used to improve the display of text/plain parts."
  :group 'notmuch
  :type 'hook
  :options '(notmuch-wash-convert-inline-patch-to-part
	     notmuch-wash-wrap-long-lines
	     notmuch-wash-tidy-citations
	     notmuch-wash-elide-blank-lines
	     notmuch-wash-excerpt-citations))

;; Mostly useful for debugging.
(defcustom notmuch-show-all-multipart/alternative-parts t
  "Should all parts of multipart/alternative parts be shown?"
  :group 'notmuch
  :type 'boolean)

(defcustom notmuch-show-indent-multipart nil
  "Should the sub-parts of a multipart/* part be indented?"
  ;; dme: Not sure which is a good default.
  :group 'notmuch
  :type 'boolean)

(defmacro with-current-notmuch-show-message (&rest body)
  "Evaluate body with current buffer set to the text of current message"
  `(save-excursion
     (let ((id (notmuch-show-get-message-id)))
       (let ((buf (generate-new-buffer (concat "*notmuch-msg-" id "*"))))
         (with-current-buffer buf
	    (call-process notmuch-command nil t nil "show" "--format=raw" id)
           ,@body)
	 (kill-buffer buf)))))

(defun notmuch-show-view-all-mime-parts ()
  "Use external viewers to view all attachments from the current message."
  (interactive)
  (with-current-notmuch-show-message
   ; We override the mm-inline-media-tests to indicate which message
   ; parts are already sufficiently handled by the original
   ; presentation of the message in notmuch-show mode. These parts
   ; will be inserted directly into the temporary buffer of
   ; with-current-notmuch-show-message and silently discarded.
   ;
   ; Any MIME part not explicitly mentioned here will be handled by an
   ; external viewer as configured in the various mailcap files.
   (let ((mm-inline-media-tests '(
				  ("text/.*" ignore identity)
				  ("application/pgp-signature" ignore identity)
				  ("multipart/alternative" ignore identity)
				  ("multipart/mixed" ignore identity)
				  ("multipart/related" ignore identity)
				 )))
     (mm-display-parts (mm-dissect-buffer)))))

(defun notmuch-foreach-mime-part (function mm-handle)
  (cond ((stringp (car mm-handle))
         (dolist (part (cdr mm-handle))
           (notmuch-foreach-mime-part function part)))
        ((bufferp (car mm-handle))
         (funcall function mm-handle))
        (t (dolist (part mm-handle)
             (notmuch-foreach-mime-part function part)))))

(defun notmuch-count-attachments (mm-handle)
  (let ((count 0))
    (notmuch-foreach-mime-part
     (lambda (p)
       (let ((disposition (mm-handle-disposition p)))
         (and (listp disposition)
              (or (equal (car disposition) "attachment")
                  (and (equal (car disposition) "inline")
                       (assq 'filename disposition)))
              (incf count))))
     mm-handle)
    count))

(defun notmuch-save-attachments (mm-handle &optional queryp)
  (notmuch-foreach-mime-part
   (lambda (p)
     (let ((disposition (mm-handle-disposition p)))
       (and (listp disposition)
            (or (equal (car disposition) "attachment")
                (and (equal (car disposition) "inline")
                     (assq 'filename disposition)))
            (or (not queryp)
                (y-or-n-p
                 (concat "Save '" (cdr (assq 'filename disposition)) "' ")))
            (mm-save-part p))))
   mm-handle))

(defun notmuch-show-save-attachments ()
  "Save all attachments from the current message."
  (interactive)
  (with-current-notmuch-show-message
   (let ((mm-handle (mm-dissect-buffer)))
     (notmuch-save-attachments
      mm-handle (> (notmuch-count-attachments mm-handle) 1))))
  (message "Done"))

(defun notmuch-show-fontify-header ()
  (let ((face (cond
	       ((looking-at "[Tt]o:")
		'message-header-to)
	       ((looking-at "[Bb]?[Cc][Cc]:")
		'message-header-cc)
	       ((looking-at "[Ss]ubject:")
		'message-header-subject)
	       ((looking-at "[Ff]rom:")
		'message-header-from)
	       (t
		'message-header-other))))

    (overlay-put (make-overlay (point) (re-search-forward ":"))
		 'face 'message-header-name)
    (overlay-put (make-overlay (point) (re-search-forward ".*$"))
		 'face face)))

(defun notmuch-show-colour-headers ()
  "Apply some colouring to the current headers."
  (goto-char (point-min))
  (while (looking-at "^[A-Za-z][-A-Za-z0-9]*:")
    (notmuch-show-fontify-header)
    (forward-line)))

(defun notmuch-show-spaces-n (n)
  "Return a string comprised of `n' spaces."
  (make-string n ? ))

(defun notmuch-show-update-tags (tags)
  "Update the displayed tags of the current message."
  (save-excursion
    (goto-char (notmuch-show-message-top))
    (if (re-search-forward "(\\([^()]*\\))$" (line-end-position) t)
	(let ((inhibit-read-only t))
	  (replace-match (concat "("
				 (propertize (mapconcat 'identity tags " ")
					     'face 'notmuch-tag-face)
				 ")"))))))

(defun notmuch-show-clean-address (address)
  "Try to clean a single email ADDRESS for display.  Return
unchanged ADDRESS if parsing fails."
  (condition-case nil
    (let* ((parsed (mail-header-parse-address address))
	   (address (car parsed))
	   (name (cdr parsed)))
      ;; Remove double quotes. They might be required during transport,
      ;; but we don't need to see them.
      (when name
        (setq name (replace-regexp-in-string "\"" "" name)))
      ;; If the address is 'foo@bar.com <foo@bar.com>' then show just
      ;; 'foo@bar.com'.
      (when (string= name address)
        (setq name nil))

      (if (not name)
        address
        (concat name " <" address ">")))
    (error address)))

(defun notmuch-show-insert-headerline (headers date tags depth)
  "Insert a notmuch style headerline based on HEADERS for a
message at DEPTH in the current thread."
  (let ((start (point)))
    (insert (notmuch-show-spaces-n depth)
	    (notmuch-show-clean-address (plist-get headers :From))
	    " ("
	    date
	    ") ("
	    (propertize (mapconcat 'identity tags " ")
			'face 'notmuch-tag-face)
	    ")\n")
    (overlay-put (make-overlay start (point)) 'face 'notmuch-message-summary-face)))

(defun notmuch-show-insert-header (header header-value)
  "Insert a single header."
  (insert header ": " header-value "\n"))

(defun notmuch-show-insert-headers (headers)
  "Insert the headers of the current message."
  (let ((start (point)))
    (mapc '(lambda (header)
	     (let* ((header-symbol (intern (concat ":" header)))
		    (header-value (plist-get headers header-symbol)))
	       (if (and header-value
			(not (string-equal "" header-value)))
		   (notmuch-show-insert-header header header-value))))
	  notmuch-message-headers)
    (save-excursion
      (save-restriction
	(narrow-to-region start (point-max))
	(run-hooks 'notmuch-show-markup-headers-hook)))))

(define-button-type 'notmuch-show-part-button-type
  'action 'notmuch-show-part-button-action
  'follow-link t
  'face 'message-mml)

(defun notmuch-show-insert-part-header (nth content-type declared-type &optional name comment)
  (let ((button))
    (setq button
	  (insert-button
	   (concat "[ "
		   (if name (concat name ": ") "")
		   declared-type
		   (if (not (string-equal declared-type content-type))
		       (concat " (as " content-type ")")
		     "")
		   (or comment "")
		   " ]")
	   :type 'notmuch-show-part-button-type
	   :notmuch-part nth
	   :notmuch-filename name))
    (insert "\n")
    ;; return button
    button))

;; Functions handling particular MIME parts.

(defun notmuch-show-save-part (message-id nth &optional filename)
  (let ((process-crypto notmuch-show-process-crypto))
    (with-temp-buffer
      (setq notmuch-show-process-crypto process-crypto)
      ;; Always acquires the part via `notmuch part', even if it is
      ;; available in the JSON output.
      (insert (notmuch-show-get-bodypart-internal message-id nth))
      (let ((file (read-file-name
		   "Filename to save as: "
		   (or mailcap-download-directory "~/")
		   nil nil
		   filename)))
	;; Don't re-compress .gz & al.  Arguably we should make
	;; `file-name-handler-alist' nil, but that would chop
	;; ange-ftp, which is reasonable to use here.
	(mm-write-region (point-min) (point-max) file nil nil nil 'no-conversion t)))))

(defun notmuch-show-mm-display-part-inline (msg part nth content-type)
  "Use the mm-decode/mm-view functions to display a part in the
current buffer, if possible."
  (let ((display-buffer (current-buffer)))
    (with-temp-buffer
      (let ((handle (mm-make-handle (current-buffer) (list content-type))))
	(if (and (mm-inlinable-p handle)
		 (mm-inlined-p handle))
	    (let ((content (notmuch-show-get-bodypart-content msg part nth)))
	      (insert content)
	      (set-buffer display-buffer)
	      (mm-display-part handle)
	      t)
	  nil)))))

(defvar notmuch-show-multipart/alternative-discouraged
  '(
    ;; Avoid HTML parts.
    "text/html"
    ;; multipart/related usually contain a text/html part and some associated graphics.
    "multipart/related"
    ))

(defun notmuch-show-multipart/*-to-list (part)
  (mapcar '(lambda (inner-part) (plist-get inner-part :content-type))
	  (plist-get part :content)))

(defun notmuch-show-multipart/alternative-choose (types)
  ;; Based on `mm-preferred-alternative-precedence'.
  (let ((seq types))
    (dolist (pref (reverse notmuch-show-multipart/alternative-discouraged))
      (dolist (elem (copy-sequence seq))
	(when (string-match pref elem)
	  (setq seq (nconc (delete elem seq) (list elem))))))
    seq))

(defun notmuch-show-insert-part-multipart/alternative (msg part content-type nth depth declared-type)
  (notmuch-show-insert-part-header nth declared-type content-type nil)
  (let ((chosen-type (car (notmuch-show-multipart/alternative-choose (notmuch-show-multipart/*-to-list part))))
	(inner-parts (plist-get part :content))
	(start (point)))
    ;; This inserts all parts of the chosen type rather than just one,
    ;; but it's not clear that this is the wrong thing to do - which
    ;; should be chosen if there are more than one that match?
    (mapc (lambda (inner-part)
	    (let ((inner-type (plist-get inner-part :content-type)))
	      (if (or notmuch-show-all-multipart/alternative-parts
		      (string= chosen-type inner-type))
		  (notmuch-show-insert-bodypart msg inner-part depth)
		(notmuch-show-insert-part-header (plist-get inner-part :id) inner-type inner-type nil " (not shown)"))))
	  inner-parts)

    (when notmuch-show-indent-multipart
      (indent-rigidly start (point) 1)))
  t)

(defun notmuch-show-setup-w3m ()
  "Instruct w3m how to retrieve content from a \"related\" part of a message."
  (interactive)
  (if (boundp 'w3m-cid-retrieve-function-alist)
    (unless (assq 'notmuch-show-mode w3m-cid-retrieve-function-alist)
      (push (cons 'notmuch-show-mode 'notmuch-show-w3m-cid-retrieve)
	    w3m-cid-retrieve-function-alist)))
  (setq mm-inline-text-html-with-images t))

(defvar w3m-current-buffer) ;; From `w3m.el'.
(defvar notmuch-show-w3m-cid-store nil)
(make-variable-buffer-local 'notmuch-show-w3m-cid-store)

(defun notmuch-show-w3m-cid-store-internal (content-id
					    message-id
					    part-number
					    content-type
					    content)
  (push (list content-id
	      message-id
	      part-number
	      content-type
	      content)
	notmuch-show-w3m-cid-store))

(defun notmuch-show-w3m-cid-store (msg part)
  (let ((content-id (plist-get part :content-id)))
    (when content-id
      (notmuch-show-w3m-cid-store-internal (concat "cid:" content-id)
					   (plist-get msg :id)
					   (plist-get part :id)
					   (plist-get part :content-type)
					   nil))))

(defun notmuch-show-w3m-cid-retrieve (url &rest args)
  (let ((matching-part (with-current-buffer w3m-current-buffer
			 (assoc url notmuch-show-w3m-cid-store))))
    (if matching-part
	(let ((message-id (nth 1 matching-part))
	      (part-number (nth 2 matching-part))
	      (content-type (nth 3 matching-part))
	      (content (nth 4 matching-part)))
	  ;; If we don't already have the content, get it and cache
	  ;; it, as some messages reference the same cid: part many
	  ;; times (hundreds!), which results in many calls to
	  ;; `notmuch part'.
	  (unless content
	    (setq content (notmuch-show-get-bodypart-internal (concat "id:" message-id)
							      part-number))
	    (with-current-buffer w3m-current-buffer
	      (notmuch-show-w3m-cid-store-internal url
						   message-id
						   part-number
						   content-type
						   content)))
	  (insert content)
	  content-type)
      nil)))

(defun notmuch-show-insert-part-multipart/related (msg part content-type nth depth declared-type)
  (notmuch-show-insert-part-header nth declared-type content-type nil)
  (let ((inner-parts (plist-get part :content))
	(start (point)))

    ;; We assume that the first part is text/html and the remainder
    ;; things that it references.

    ;; Stash the non-primary parts.
    (mapc (lambda (part)
	    (notmuch-show-w3m-cid-store msg part))
	  (cdr inner-parts))

    ;; Render the primary part.
    (notmuch-show-insert-bodypart msg (car inner-parts) depth)

    (when notmuch-show-indent-multipart
      (indent-rigidly start (point) 1)))
  t)

(defun notmuch-show-insert-part-multipart/signed (msg part content-type nth depth declared-type)
  (let ((button (notmuch-show-insert-part-header nth declared-type content-type nil)))
    (button-put button 'face '(:foreground "blue"))
    ;; add signature status button if sigstatus provided
    (if (plist-member part :sigstatus)
	(let* ((headers (plist-get msg :headers))
	       (from (plist-get headers :From))
	       (sigstatus (car (plist-get part :sigstatus))))
	  (notmuch-crypto-insert-sigstatus-button sigstatus from))
      ;; if we're not adding sigstatus, tell the user how they can get it
      (button-put button 'help-echo "Set notmuch-crypto-process-mime to process cryptographic mime parts.")))

  (let ((inner-parts (plist-get part :content))
	(start (point)))
    ;; Show all of the parts.
    (mapc (lambda (inner-part)
	    (notmuch-show-insert-bodypart msg inner-part depth))
	  inner-parts)

    (when notmuch-show-indent-multipart
      (indent-rigidly start (point) 1)))
  t)

(defun notmuch-show-insert-part-multipart/encrypted (msg part content-type nth depth declared-type)
  (let ((button (notmuch-show-insert-part-header nth declared-type content-type nil)))
    (button-put button 'face '(:foreground "blue"))
    ;; add encryption status button if encstatus specified
    (if (plist-member part :encstatus)
	(let ((encstatus (car (plist-get part :encstatus))))
	  (notmuch-crypto-insert-encstatus-button encstatus)
	  ;; add signature status button if sigstatus specified
	  (if (plist-member part :sigstatus)
	      (let* ((headers (plist-get msg :headers))
		     (from (plist-get headers :From))
		     (sigstatus (car (plist-get part :sigstatus))))
		(notmuch-crypto-insert-sigstatus-button sigstatus from))))
      ;; if we're not adding encstatus, tell the user how they can get it
      (button-put button 'help-echo "Set notmuch-crypto-process-mime to process cryptographic mime parts.")))

  (let ((inner-parts (plist-get part :content))
	(start (point)))
    ;; Show all of the parts.
    (mapc (lambda (inner-part)
	    (notmuch-show-insert-bodypart msg inner-part depth))
	  inner-parts)

    (when notmuch-show-indent-multipart
      (indent-rigidly start (point) 1)))
  t)

(defun notmuch-show-insert-part-multipart/* (msg part content-type nth depth declared-type)
  (notmuch-show-insert-part-header nth declared-type content-type nil)
  (let ((inner-parts (plist-get part :content))
	(start (point)))
    ;; Show all of the parts.
    (mapc (lambda (inner-part)
	    (notmuch-show-insert-bodypart msg inner-part depth))
	  inner-parts)

    (when notmuch-show-indent-multipart
      (indent-rigidly start (point) 1)))
  t)

(defun notmuch-show-insert-part-message/rfc822 (msg part content-type nth depth declared-type)
  (notmuch-show-insert-part-header nth declared-type content-type nil)
  (let* ((message (car (plist-get part :content)))
	 (headers (plist-get message :headers))
	 (body (car (plist-get message :body)))
	 (start (point)))

    ;; Override `notmuch-message-headers' to force `From' to be
    ;; displayed.
    (let ((notmuch-message-headers '("From" "Subject" "To" "Cc" "Date")))
      (notmuch-show-insert-headers (plist-get message :headers)))

    ;; Blank line after headers to be compatible with the normal
    ;; message display.
    (insert "\n")

    ;; Show the body
    (notmuch-show-insert-bodypart msg body depth)

    (when notmuch-show-indent-multipart
      (indent-rigidly start (point) 1)))
  t)

(defun notmuch-show-insert-part-text/plain (msg part content-type nth depth declared-type)
  (let ((start (point)))
    ;; If this text/plain part is not the first part in the message,
    ;; insert a header to make this clear.
    (if (> nth 1)
	(notmuch-show-insert-part-header nth declared-type content-type (plist-get part :filename)))
    (insert (notmuch-show-get-bodypart-content msg part nth))
    (save-excursion
      (save-restriction
	(narrow-to-region start (point-max))
	(run-hook-with-args 'notmuch-show-insert-text/plain-hook msg depth))))
  t)

(defun notmuch-show-insert-part-text/x-vcalendar (msg part content-type nth depth declared-type)
  (notmuch-show-insert-part-header nth declared-type content-type (plist-get part :filename))
  (insert (with-temp-buffer
	    (insert (notmuch-show-get-bodypart-content msg part nth))
	    (goto-char (point-min))
	    (let ((file (make-temp-file "notmuch-ical"))
		  result)
	      (icalendar--convert-ical-to-diary
	       (icalendar--read-element nil nil)
	       file t)
	      (set-buffer (get-file-buffer file))
	      (setq result (buffer-substring (point-min) (point-max)))
	      (set-buffer-modified-p nil)
	      (kill-buffer (current-buffer))
	      (delete-file file)
	      result)))
  t)

(defun notmuch-show-insert-part-application/octet-stream (msg part content-type nth depth declared-type)
  ;; If we can deduce a MIME type from the filename of the attachment,
  ;; do so and pass it on to the handler for that type.
  (if (plist-get part :filename)
      (let ((extension (file-name-extension (plist-get part :filename)))
	    mime-type)
	(if extension
	    (progn
	      (mailcap-parse-mimetypes)
	      (setq mime-type (mailcap-extension-to-mime extension))
	      (if (and mime-type
		       (not (string-equal mime-type "application/octet-stream")))
		  (notmuch-show-insert-bodypart-internal msg part mime-type nth depth content-type)
		nil))
	  nil))))

(defun notmuch-show-insert-part-*/* (msg part content-type nth depth declared-type)
  ;; This handler _must_ succeed - it is the handler of last resort.
  (notmuch-show-insert-part-header nth content-type declared-type (plist-get part :filename))
  (notmuch-show-mm-display-part-inline msg part nth content-type)
  t)

;; Functions for determining how to handle MIME parts.

(defun notmuch-show-split-content-type (content-type)
  (split-string content-type "/"))

(defun notmuch-show-handlers-for (content-type)
  "Return a list of content handlers for a part of type CONTENT-TYPE."
  (let (result)
    (mapc (lambda (func)
	    (if (functionp func)
		(push func result)))
	  ;; Reverse order of prefrence.
	  (list (intern (concat "notmuch-show-insert-part-*/*"))
		(intern (concat
			 "notmuch-show-insert-part-"
			 (car (notmuch-show-split-content-type content-type))
			 "/*"))
		(intern (concat "notmuch-show-insert-part-" content-type))))
    result))

;; Helper for parts which are generally not included in the default
;; JSON output.
;; Uses the buffer-local variable notmuch-show-process-crypto to
;; determine if parts should be decrypted first.
(defun notmuch-show-get-bodypart-internal (message-id part-number)
  (let ((args '("show" "--format=raw"))
	(part-arg (format "--part=%s" part-number)))
    (setq args (append args (list part-arg)))
    (if notmuch-show-process-crypto
	(setq args (append args '("--decrypt"))))
    (setq args (append args (list message-id)))
    (with-temp-buffer
      (let ((coding-system-for-read 'no-conversion))
	(progn
	  (apply 'call-process (append (list notmuch-command nil (list t nil) nil) args))
	  (buffer-string))))))

(defun notmuch-show-get-bodypart-content (msg part nth)
  (or (plist-get part :content)
      (notmuch-show-get-bodypart-internal (concat "id:" (plist-get msg :id)) nth)))

;; \f

(defun notmuch-show-insert-bodypart-internal (msg part content-type nth depth declared-type)
  (let ((handlers (notmuch-show-handlers-for content-type)))
    ;; Run the content handlers until one of them returns a non-nil
    ;; value.
    (while (and handlers
		(not (funcall (car handlers) msg part content-type nth depth declared-type)))
      (setq handlers (cdr handlers))))
  t)

(defun notmuch-show-insert-bodypart (msg part depth)
  "Insert the body part PART at depth DEPTH in the current thread."
  (let ((content-type (downcase (plist-get part :content-type)))
	(nth (plist-get part :id)))
    (notmuch-show-insert-bodypart-internal msg part content-type nth depth content-type))
  ;; Some of the body part handlers leave point somewhere up in the
  ;; part, so we make sure that we're down at the end.
  (goto-char (point-max))
  ;; Ensure that the part ends with a carriage return.
  (if (not (bolp))
      (insert "\n")))

(defun notmuch-show-insert-body (msg body depth)
  "Insert the body BODY at depth DEPTH in the current thread."
  (mapc '(lambda (part) (notmuch-show-insert-bodypart msg part depth)) body))

(defun notmuch-show-make-symbol (type)
  (make-symbol (concat "notmuch-show-" type)))

(defun notmuch-show-strip-re (string)
  (replace-regexp-in-string "\\([Rr]e: *\\)+" "" string))

(defvar notmuch-show-previous-subject "")
(make-variable-buffer-local 'notmuch-show-previous-subject)

(defun notmuch-show-insert-msg (msg depth)
  "Insert the message MSG at depth DEPTH in the current thread."
  (let* ((headers (plist-get msg :headers))
	 ;; Indentation causes the buffer offset of the start/end
	 ;; points to move, so we must use markers.
	 message-start message-end
	 content-start content-end
	 headers-start headers-end
	 body-start body-end
	 (headers-invis-spec (notmuch-show-make-symbol "header"))
	 (message-invis-spec (notmuch-show-make-symbol "message"))
	 (bare-subject (notmuch-show-strip-re (plist-get headers :Subject))))

    ;; Set `buffer-invisibility-spec' to `nil' (a list), otherwise
    ;; removing items from `buffer-invisibility-spec' (which is what
    ;; `notmuch-show-headers-visible' and
    ;; `notmuch-show-message-visible' do) is a no-op and has no
    ;; effect. This caused threads with only matching messages to have
    ;; those messages hidden initially because
    ;; `buffer-invisibility-spec' stayed `t'.
    ;;
    ;; This needs to be set here (rather than just above the call to
    ;; `notmuch-show-headers-visible') because some of the part
    ;; rendering or body washing functions
    ;; (e.g. `notmuch-wash-text/plain-citations') manipulate
    ;; `buffer-invisibility-spec').
    (when (eq buffer-invisibility-spec t)
      (setq buffer-invisibility-spec nil))

    (setq message-start (point-marker))

    (notmuch-show-insert-headerline headers
				    (or (if notmuch-show-relative-dates
					    (plist-get msg :date_relative)
					  nil)
					(plist-get headers :Date))
				    (plist-get msg :tags) depth)

    (setq content-start (point-marker))

    (plist-put msg :headers-invis-spec headers-invis-spec)
    (plist-put msg :message-invis-spec message-invis-spec)

    ;; Set `headers-start' to point after the 'Subject:' header to be
    ;; compatible with the existing implementation. This just sets it
    ;; to after the first header.
    (notmuch-show-insert-headers headers)
    ;; Headers should include a blank line (backwards compatibility).
    (insert "\n")
    (save-excursion
      (goto-char content-start)
      ;; If the subject of this message is the same as that of the
      ;; previous message, don't display it when this message is
      ;; collapsed.
      (when (not (string= notmuch-show-previous-subject
			  bare-subject))
	(forward-line 1))
      (setq headers-start (point-marker)))
    (setq headers-end (point-marker))

    (setq notmuch-show-previous-subject bare-subject)

    (setq body-start (point-marker))
    (notmuch-show-insert-body msg (plist-get msg :body) depth)
    ;; Ensure that the body ends with a newline.
    (if (not (bolp))
	(insert "\n"))
    (setq body-end (point-marker))
    (setq content-end (point-marker))

    ;; Indent according to the depth in the thread.
    (indent-rigidly content-start content-end depth)

    (setq message-end (point-max-marker))

    ;; Save the extents of this message over the whole text of the
    ;; message.
    (put-text-property message-start message-end :notmuch-message-extent (cons message-start message-end))

    (let ((headers-overlay (make-overlay headers-start headers-end))
          (invis-specs (list headers-invis-spec message-invis-spec)))
      (overlay-put headers-overlay 'invisible invis-specs)
      (overlay-put headers-overlay 'priority 10))
    (overlay-put (make-overlay body-start body-end) 'invisible message-invis-spec)

    ;; Save the properties for this message. Currently this saves the
    ;; entire message (augmented it with other stuff), which seems
    ;; like overkill. We might save a reduced subset (for example, not
    ;; the content).
    (notmuch-show-set-message-properties msg)

    ;; Set header visibility.
    (notmuch-show-headers-visible msg notmuch-message-headers-visible)

    ;; Message visibility depends on whether it matched the search
    ;; criteria.
    (notmuch-show-message-visible msg (plist-get msg :match))))

(defun notmuch-show-insert-tree (tree depth)
  "Insert the message tree TREE at depth DEPTH in the current thread."
  (let ((msg (car tree))
	(replies (cadr tree)))
    (notmuch-show-insert-msg msg depth)
    (notmuch-show-insert-thread replies (1+ depth))))

(defun notmuch-show-insert-thread (thread depth)
  "Insert the thread THREAD at depth DEPTH in the current forest."
  (mapc '(lambda (tree) (notmuch-show-insert-tree tree depth)) thread))

(defun notmuch-show-insert-forest (forest)
  "Insert the forest of threads FOREST."
  (mapc '(lambda (thread) (notmuch-show-insert-thread thread 0)) forest))

(defvar notmuch-show-thread-id nil)
(make-variable-buffer-local 'notmuch-show-thread-id)
(defvar notmuch-show-parent-buffer nil)
(make-variable-buffer-local 'notmuch-show-parent-buffer)
(defvar notmuch-show-query-context nil)
(make-variable-buffer-local 'notmuch-show-query-context)
(defvar notmuch-show-buffer-name nil)
(make-variable-buffer-local 'notmuch-show-buffer-name)

(defun notmuch-show-buttonise-links (start end)
  "Buttonise URLs and mail addresses between START and END.

This also turns id:\"<message id>\"-parts into buttons for
a corresponding notmuch search."
  (goto-address-fontify-region start end)
  (save-excursion
    (goto-char start)
    (while (re-search-forward "id:\\(\"?\\)[^[:space:]\"]+\\1" end t)
      ;; remove the overlay created by goto-address-mode
      (remove-overlays (match-beginning 0) (match-end 0) 'goto-address t)
      (make-text-button (match-beginning 0) (match-end 0)
			'action `(lambda (arg)
				   (notmuch-search ,(match-string-no-properties 0)))
			'follow-link t
			'help-echo "Mouse-1, RET: search for this message"
			'face goto-address-mail-face))))

;;;###autoload
(defun notmuch-show (thread-id &optional parent-buffer query-context buffer-name crypto-switch)
  "Run \"notmuch show\" with the given thread ID and display results.

The optional PARENT-BUFFER is the notmuch-search buffer from
which this notmuch-show command was executed, (so that the
next thread from that buffer can be show when done with this
one).

The optional QUERY-CONTEXT is a notmuch search term. Only
messages from the thread matching this search term are shown if
non-nil.

The optional BUFFER-NAME provides the name of the buffer in
which the message thread is shown. If it is nil (which occurs
when the command is called interactively) the argument to the
function is used.

The optional CRYPTO-SWITCH toggles the value of the
notmuch-crypto-process-mime customization variable for this show
buffer."
  (interactive "sNotmuch show: ")
  (let* ((process-crypto (if crypto-switch
			     (not notmuch-crypto-process-mime)
			   notmuch-crypto-process-mime)))
    (notmuch-show-worker thread-id parent-buffer query-context buffer-name process-crypto)))

(defun notmuch-show-worker (thread-id parent-buffer query-context buffer-name process-crypto)
  (let* ((buffer-name (generate-new-buffer-name
		       (or buffer-name
			   (concat "*notmuch-" thread-id "*"))))
	 (buffer (get-buffer-create buffer-name))
	 (inhibit-read-only t))
    (switch-to-buffer buffer)
    (notmuch-show-mode)
    ;; Don't track undo information for this buffer
    (set 'buffer-undo-list t)

    (setq notmuch-show-thread-id thread-id)
    (setq notmuch-show-parent-buffer parent-buffer)
    (setq notmuch-show-query-context query-context)
    (setq notmuch-show-buffer-name buffer-name)
    (setq notmuch-show-process-crypto process-crypto)

    (erase-buffer)
    (goto-char (point-min))
    (save-excursion
      (let* ((basic-args (list thread-id))
	     (args (if query-context
		       (append (list "\'") basic-args (list "and (" query-context ")\'"))
		     (append (list "\'") basic-args (list "\'")))))
	(notmuch-show-insert-forest (notmuch-query-get-threads args))
	;; If the query context reduced the results to nothing, run
	;; the basic query.
	(when (and (eq (buffer-size) 0)
		   query-context)
	  (notmuch-show-insert-forest
	   (notmuch-query-get-threads basic-args))))

      (jit-lock-register #'notmuch-show-buttonise-links)

      ;; Act on visual lines rather than logical lines.
      (visual-line-mode t)

      (run-hooks 'notmuch-show-hook))

    ;; Move straight to the first open message
    (if (not (notmuch-show-message-visible-p))
	(notmuch-show-next-open-message))

    ;; Set the header line to the subject of the first open message.
    (setq header-line-format (notmuch-show-strip-re (notmuch-show-get-subject)))

    (notmuch-show-mark-read)))

(defun notmuch-show-refresh-view (&optional crypto-switch)
  "Refresh the current view (with crypto switch if prefix given).

Kills the current buffer and reruns notmuch show with the same
thread id.  If a prefix is given, crypto processing is toggled."
  (interactive "P")
  (let ((thread-id notmuch-show-thread-id)
	(parent-buffer notmuch-show-parent-buffer)
	(query-context notmuch-show-query-context)
	(buffer-name notmuch-show-buffer-name)
	(process-crypto (if crypto-switch
			    (not notmuch-show-process-crypto)
			  notmuch-show-process-crypto)))
    (notmuch-kill-this-buffer)
    (notmuch-show-worker thread-id parent-buffer query-context buffer-name process-crypto)))

(defvar notmuch-show-stash-map
  (let ((map (make-sparse-keymap)))
    (define-key map "c" 'notmuch-show-stash-cc)
    (define-key map "d" 'notmuch-show-stash-date)
    (define-key map "F" 'notmuch-show-stash-filename)
    (define-key map "f" 'notmuch-show-stash-from)
    (define-key map "i" 'notmuch-show-stash-message-id)
    (define-key map "I" 'notmuch-show-stash-message-id-stripped)
    (define-key map "s" 'notmuch-show-stash-subject)
    (define-key map "T" 'notmuch-show-stash-tags)
    (define-key map "t" 'notmuch-show-stash-to)
    map)
  "Submap for stash commands")
(fset 'notmuch-show-stash-map notmuch-show-stash-map)

(defvar notmuch-show-mode-map
      (let ((map (make-sparse-keymap)))
	(define-key map "?" 'notmuch-help)
	(define-key map "q" 'notmuch-kill-this-buffer)
	(define-key map (kbd "<C-tab>") 'widget-backward)
	(define-key map (kbd "M-TAB") 'notmuch-show-previous-button)
	(define-key map (kbd "<backtab>") 'notmuch-show-previous-button)
	(define-key map (kbd "TAB") 'notmuch-show-next-button)
	(define-key map "s" 'notmuch-search)
	(define-key map "m" 'notmuch-mua-new-mail)
	(define-key map "f" 'notmuch-show-forward-message)
	(define-key map "r" 'notmuch-show-reply)
	(define-key map "|" 'notmuch-show-pipe-message)
	(define-key map "w" 'notmuch-show-save-attachments)
	(define-key map "V" 'notmuch-show-view-raw-message)
	(define-key map "v" 'notmuch-show-view-all-mime-parts)
	(define-key map "c" 'notmuch-show-stash-map)
	(define-key map "=" 'notmuch-show-refresh-view)
	(define-key map "h" 'notmuch-show-toggle-headers)
	(define-key map "-" 'notmuch-show-remove-tag)
	(define-key map "+" 'notmuch-show-add-tag)
	(define-key map "x" 'notmuch-show-archive-thread-then-exit)
	(define-key map "a" 'notmuch-show-archive-thread)
	(define-key map "N" 'notmuch-show-next-message)
	(define-key map "P" 'notmuch-show-previous-message)
	(define-key map "n" 'notmuch-show-next-open-message)
	(define-key map "p" 'notmuch-show-previous-open-message)
	(define-key map (kbd "DEL") 'notmuch-show-rewind)
	(define-key map " " 'notmuch-show-advance-and-archive)
	(define-key map (kbd "M-RET") 'notmuch-show-open-or-close-all)
	(define-key map (kbd "RET") 'notmuch-show-toggle-message)
	map)
      "Keymap for \"notmuch show\" buffers.")
(fset 'notmuch-show-mode-map notmuch-show-mode-map)

(defun notmuch-show-mode ()
  "Major mode for viewing a thread with notmuch.

This buffer contains the results of the \"notmuch show\" command
for displaying a single thread of email from your email archives.

By default, various components of email messages, (citations,
signatures, already-read messages), are hidden. You can make
these parts visible by clicking with the mouse button or by
pressing RET after positioning the cursor on a hidden part, (for
which \\[notmuch-show-next-button] and \\[notmuch-show-previous-button] are helpful).

Reading the thread sequentially is well-supported by pressing
\\[notmuch-show-advance-and-archive]. This will scroll the current message (if necessary), advance
to the next message, or advance to the next thread (if already on
the last message of a thread).

Other commands are available to read or manipulate the thread
more selectively, (such as '\\[notmuch-show-next-message]' and '\\[notmuch-show-previous-message]' to advance to messages
without removing any tags, and '\\[notmuch-show-archive-thread]' to archive an entire thread
without scrolling through with \\[notmuch-show-advance-and-archive]).

You can add or remove arbitrary tags from the current message with
'\\[notmuch-show-add-tag]' or '\\[notmuch-show-remove-tag]'.

All currently available key bindings:

\\{notmuch-show-mode-map}"
  (interactive)
  (kill-all-local-variables)
  (use-local-map notmuch-show-mode-map)
  (setq major-mode 'notmuch-show-mode
	mode-name "notmuch-show")
  (setq buffer-read-only t))

(defun notmuch-show-move-to-message-top ()
  (goto-char (notmuch-show-message-top)))

(defun notmuch-show-move-to-message-bottom ()
  (goto-char (notmuch-show-message-bottom)))

(defun notmuch-show-message-adjust ()
  (recenter 0))

;; Movement related functions.

;; There's some strangeness here where a text property applied to a
;; region a->b is not found when point is at b. We walk backwards
;; until finding the property.
(defun notmuch-show-message-extent ()
  (let (r)
    (save-excursion
      (while (not (setq r (get-text-property (point) :notmuch-message-extent)))
	(backward-char)))
    r))

(defun notmuch-show-message-top ()
  (car (notmuch-show-message-extent)))

(defun notmuch-show-message-bottom ()
  (cdr (notmuch-show-message-extent)))

(defun notmuch-show-goto-message-next ()
  (let ((start (point)))
    (notmuch-show-move-to-message-bottom)
    (if (not (eobp))
	t
      (goto-char start)
      nil)))

(defun notmuch-show-goto-message-previous ()
  (notmuch-show-move-to-message-top)
  (if (bobp)
      nil
    (backward-char)
    (notmuch-show-move-to-message-top)
    t))

;; Functions relating to the visibility of messages and their
;; components.

(defun notmuch-show-element-visible (props visible-p spec-property)
  (let ((spec (plist-get props spec-property)))
    (if visible-p
	(remove-from-invisibility-spec spec)
      (add-to-invisibility-spec spec))))

(defun notmuch-show-message-visible (props visible-p)
  (notmuch-show-element-visible props visible-p :message-invis-spec)
  (notmuch-show-set-prop :message-visible visible-p props))

(defun notmuch-show-headers-visible (props visible-p)
  (notmuch-show-element-visible props visible-p :headers-invis-spec)
  (notmuch-show-set-prop :headers-visible visible-p props))

;; Functions for setting and getting attributes of the current
;; message.

(defun notmuch-show-set-message-properties (props)
  (save-excursion
    (notmuch-show-move-to-message-top)
    (put-text-property (point) (+ (point) 1) :notmuch-message-properties props)))

(defun notmuch-show-get-message-properties ()
  (save-excursion
    (notmuch-show-move-to-message-top)
    (get-text-property (point) :notmuch-message-properties)))

(defun notmuch-show-set-prop (prop val &optional props)
  (let ((inhibit-read-only t)
	(props (or props
		   (notmuch-show-get-message-properties))))
    (plist-put props prop val)
    (notmuch-show-set-message-properties props)))

(defun notmuch-show-get-prop (prop &optional props)
  (let ((props (or props
		   (notmuch-show-get-message-properties))))
    (plist-get props prop)))

(defun notmuch-show-get-message-id ()
  "Return the message id of the current message."
  (concat "id:\"" (notmuch-show-get-prop :id) "\""))

;; dme: Would it make sense to use a macro for many of these?

(defun notmuch-show-get-filename ()
  "Return the filename of the current message."
  (notmuch-show-get-prop :filename))

(defun notmuch-show-get-header (header)
  "Return the named header of the current message, if any."
  (plist-get (notmuch-show-get-prop :headers) header))

(defun notmuch-show-get-cc ()
  (notmuch-show-get-header :Cc))

(defun notmuch-show-get-date ()
  (notmuch-show-get-header :Date))

(defun notmuch-show-get-from ()
  (notmuch-show-get-header :From))

(defun notmuch-show-get-subject ()
  (notmuch-show-get-header :Subject))

(defun notmuch-show-get-to ()
  (notmuch-show-get-header :To))

(defun notmuch-show-set-tags (tags)
  "Set the tags of the current message."
  (notmuch-show-set-prop :tags tags)
  (notmuch-show-update-tags tags))

(defun notmuch-show-get-tags ()
  "Return the tags of the current message."
  (notmuch-show-get-prop :tags))

(defun notmuch-show-message-visible-p ()
  "Is the current message visible?"
  (notmuch-show-get-prop :message-visible))

(defun notmuch-show-headers-visible-p ()
  "Are the headers of the current message visible?"
  (notmuch-show-get-prop :headers-visible))

(defun notmuch-show-mark-read ()
  "Mark the current message as read."
  (notmuch-show-remove-tag "unread"))

;; Functions for getting attributes of several messages in the current
;; thread.

(defun notmuch-show-get-message-ids-for-open-messages ()
  "Return a list of all message IDs for open messages in the current thread."
  (save-excursion
    (let (message-ids done)
      (goto-char (point-min))
      (while (not done)
	(if (notmuch-show-message-visible-p)
	    (setq message-ids (append message-ids (list (notmuch-show-get-message-id)))))
	(setq done (not (notmuch-show-goto-message-next)))
	)
      message-ids
      )))

;; Commands typically bound to keys.

(defun notmuch-show-advance ()
  "Advance through thread.

If the current message in the thread is not yet fully visible,
scroll by a near screenful to read more of the message.

Otherwise, (the end of the current message is already within the
current window), advance to the next open message."
  (interactive)
  (let* ((end-of-this-message (notmuch-show-message-bottom))
	 (visible-end-of-this-message (1- end-of-this-message))
	 (ret nil))
    (while (invisible-p visible-end-of-this-message)
      (setq visible-end-of-this-message
	    (previous-single-char-property-change visible-end-of-this-message
						  'invisible)))
    (cond
     ;; Ideally we would test `end-of-this-message' against the result
     ;; of `window-end', but that doesn't account for the fact that
     ;; the end of the message might be hidden.
     ((and visible-end-of-this-message
	   (> visible-end-of-this-message (window-end)))
      ;; The bottom of this message is not visible - scroll.
      (scroll-up nil))

     ((not (= end-of-this-message (point-max)))
      ;; This is not the last message - move to the next visible one.
      (notmuch-show-next-open-message))

     (t
      ;; This is the last message - change the return value
      (setq ret t)))
    ret))

(defun notmuch-show-advance-and-archive ()
  "Advance through thread and archive.

This command is intended to be one of the simplest ways to
process a thread of email. It works exactly like
notmuch-show-advance, in that it scrolls through messages in a
show buffer, except that when it gets to the end of the buffer it
archives the entire current thread, (remove the \"inbox\" tag
from each message), kills the buffer, and displays the next
thread from the search from which this thread was originally
shown."
  (interactive)
  (if (notmuch-show-advance)
      (notmuch-show-archive-thread)))

(defun notmuch-show-rewind ()
  "Backup through the thread, (reverse scrolling compared to \\[notmuch-show-advance-and-archive]).

Specifically, if the beginning of the previous email is fewer
than `window-height' lines from the current point, move to it
just like `notmuch-show-previous-message'.

Otherwise, just scroll down a screenful of the current message.

This command does not modify any message tags, (it does not undo
any effects from previous calls to
`notmuch-show-advance-and-archive'."
  (interactive)
  (let ((start-of-message (notmuch-show-message-top))
	(start-of-window (window-start)))
    (cond
      ;; Either this message is properly aligned with the start of the
      ;; window or the start of this message is not visible on the
      ;; screen - scroll.
     ((or (= start-of-message start-of-window)
	  (< start-of-message start-of-window))
      (scroll-down)
      ;; If a small number of lines from the previous message are
      ;; visible, realign so that the top of the current message is at
      ;; the top of the screen.
      (if (<= (count-screen-lines (window-start) start-of-message)
	      next-screen-context-lines)
	  (progn
	    (goto-char (notmuch-show-message-top))
	    (notmuch-show-message-adjust)))
      ;; Move to the top left of the window.
      (goto-char (window-start)))
     (t
      ;; Move to the previous message.
      (notmuch-show-previous-message)))))

(defun notmuch-show-reply (&optional prompt-for-sender)
  "Reply to the current message."
  (interactive "P")
  (notmuch-mua-new-reply (notmuch-show-get-message-id) prompt-for-sender))

(defun notmuch-show-forward-message (&optional prompt-for-sender)
  "Forward the current message."
  (interactive "P")
  (with-current-notmuch-show-message
   (notmuch-mua-new-forward-message prompt-for-sender)))

(defun notmuch-show-next-message ()
  "Show the next message."
  (interactive)
  (if (notmuch-show-goto-message-next)
      (progn
	(notmuch-show-mark-read)
	(notmuch-show-message-adjust))
    (goto-char (point-max))))

(defun notmuch-show-previous-message ()
  "Show the previous message."
  (interactive)
  (notmuch-show-goto-message-previous)
  (notmuch-show-mark-read)
  (notmuch-show-message-adjust))

(defun notmuch-show-next-open-message ()
  "Show the next message."
  (interactive)
  (let (r)
    (while (and (setq r (notmuch-show-goto-message-next))
		(not (notmuch-show-message-visible-p))))
    (if r
	(progn
	  (notmuch-show-mark-read)
	  (notmuch-show-message-adjust))
      (goto-char (point-max)))))

(defun notmuch-show-previous-open-message ()
  "Show the previous message."
  (interactive)
  (while (and (notmuch-show-goto-message-previous)
	      (not (notmuch-show-message-visible-p))))
  (notmuch-show-mark-read)
  (notmuch-show-message-adjust))

(defun notmuch-show-view-raw-message ()
  "View the file holding the current message."
  (interactive)
  (let* ((id (notmuch-show-get-message-id))
	 (buf (get-buffer-create (concat "*notmuch-raw-" id "*"))))
    (call-process notmuch-command nil buf nil "show" "--format=raw" id)
    (switch-to-buffer buf)
    (goto-char (point-min))
    (set-buffer-modified-p nil)
    (view-buffer buf 'kill-buffer-if-not-modified)))

(defun notmuch-show-pipe-message (entire-thread command)
  "Pipe the contents of the current message (or thread) to the given command.

The given command will be executed with the raw contents of the
current email message as stdin. Anything printed by the command
to stdout or stderr will appear in the *notmuch-pipe* buffer.

When invoked with a prefix argument, the command will receive all
open messages in the current thread (formatted as an mbox) rather
than only the current message."
  (interactive "P\nsPipe message to command: ")
  (let (shell-command)
    (if entire-thread
	(setq shell-command 
	      (concat notmuch-command " show --format=mbox "
		      (shell-quote-argument
		       (mapconcat 'identity (notmuch-show-get-message-ids-for-open-messages) " OR "))
		      " | " command))
      (setq shell-command
	    (concat notmuch-command " show --format=raw "
		    (shell-quote-argument (notmuch-show-get-message-id)) " | " command)))
    (let ((buf (get-buffer-create (concat "*notmuch-pipe*"))))
      (with-current-buffer buf
	(setq buffer-read-only nil)
	(erase-buffer)
	(let ((exit-code (call-process-shell-command shell-command nil buf)))
	  (goto-char (point-max))
	  (set-buffer-modified-p nil)
	  (setq buffer-read-only t)
	  (unless (zerop exit-code)
	    (switch-to-buffer-other-window buf)
	    (message (format "Command '%s' exited abnormally with code %d"
			     shell-command exit-code))))))))

(defun notmuch-show-add-tags-worker (current-tags add-tags)
  "Add to `current-tags' with any tags from `add-tags' not
currently present and return the result."
  (let ((result-tags (copy-sequence current-tags)))
    (mapc (lambda (add-tag)
	    (unless (member add-tag current-tags)
	      (setq result-tags (push add-tag result-tags))))
	    add-tags)
    (sort result-tags 'string<)))

(defun notmuch-show-del-tags-worker (current-tags del-tags)
  "Remove any tags in `del-tags' from `current-tags' and return
the result."
  (let ((result-tags (copy-sequence current-tags)))
    (mapc (lambda (del-tag)
	    (setq result-tags (delete del-tag result-tags)))
	  del-tags)
    result-tags))

(defun notmuch-show-add-tag (&rest toadd)
  "Add a tag to the current message."
  (interactive
   (list (notmuch-select-tag-with-completion "Tag to add: ")))

  (let* ((current-tags (notmuch-show-get-tags))
	 (new-tags (notmuch-show-add-tags-worker current-tags toadd)))

    (unless (equal current-tags new-tags)
      (apply 'notmuch-tag (notmuch-show-get-message-id)
	     (mapcar (lambda (s) (concat "+" s)) toadd))
      (notmuch-show-set-tags new-tags))))

(defun notmuch-show-remove-tag (&rest toremove)
  "Remove a tag from the current message."
  (interactive
   (list (notmuch-select-tag-with-completion
	  "Tag to remove: " (notmuch-show-get-message-id))))

  (let* ((current-tags (notmuch-show-get-tags))
	 (new-tags (notmuch-show-del-tags-worker current-tags toremove)))

    (unless (equal current-tags new-tags)
      (apply 'notmuch-tag (notmuch-show-get-message-id)
	     (mapcar (lambda (s) (concat "-" s)) toremove))
      (notmuch-show-set-tags new-tags))))

(defun notmuch-show-toggle-headers ()
  "Toggle the visibility of the current message headers."
  (interactive)
  (let ((props (notmuch-show-get-message-properties)))
    (notmuch-show-headers-visible
     props
     (not (plist-get props :headers-visible))))
  (force-window-update))

(defun notmuch-show-toggle-message ()
  "Toggle the visibility of the current message."
  (interactive)
  (let ((props (notmuch-show-get-message-properties)))
    (notmuch-show-message-visible
     props
     (not (plist-get props :message-visible))))
  (force-window-update))

(defun notmuch-show-open-or-close-all ()
  "Set the visibility all of the messages in the current thread.
By default make all of the messages visible. With a prefix
argument, hide all of the messages."
  (interactive)
  (save-excursion
    (goto-char (point-min))
    (loop do (notmuch-show-message-visible (notmuch-show-get-message-properties)
					   (not current-prefix-arg))
	  until (not (notmuch-show-goto-message-next))))
  (force-window-update))

(defun notmuch-show-next-button ()
  "Advance point to the next button in the buffer."
  (interactive)
  (forward-button 1))

(defun notmuch-show-previous-button ()
  "Move point back to the previous button in the buffer."
  (interactive)
  (backward-button 1))

(defun notmuch-show-archive-thread-internal (show-next)
  ;; Remove the tag from the current set of messages.
  (goto-char (point-min))
  (loop do (notmuch-show-remove-tag "inbox")
	until (not (notmuch-show-goto-message-next)))
  ;; Move to the next item in the search results, if any.
  (let ((parent-buffer notmuch-show-parent-buffer))
    (notmuch-kill-this-buffer)
    (if parent-buffer
	(progn
	  (switch-to-buffer parent-buffer)
	  (forward-line)
	  (if show-next
	      (notmuch-search-show-thread))))))

(defun notmuch-show-archive-thread ()
  "Archive each message in thread, then show next thread from search.

Archive each message currently shown by removing the \"inbox\"
tag from each. Then kill this buffer and show the next thread
from the search from which this thread was originally shown.

Note: This command is safe from any race condition of new messages
being delivered to the same thread. It does not archive the
entire thread, but only the messages shown in the current
buffer."
  (interactive)
  (notmuch-show-archive-thread-internal t))

(defun notmuch-show-archive-thread-then-exit ()
  "Archive each message in thread, then exit back to search results."
  (interactive)
  (notmuch-show-archive-thread-internal nil))

(defun notmuch-show-stash-cc ()
  "Copy CC field of current message to kill-ring."
  (interactive)
  (notmuch-common-do-stash (notmuch-show-get-cc)))

(defun notmuch-show-stash-date ()
  "Copy date of current message to kill-ring."
  (interactive)
  (notmuch-common-do-stash (notmuch-show-get-date)))

(defun notmuch-show-stash-filename ()
  "Copy filename of current message to kill-ring."
  (interactive)
  (notmuch-common-do-stash (notmuch-show-get-filename)))

(defun notmuch-show-stash-from ()
  "Copy From address of current message to kill-ring."
  (interactive)
  (notmuch-common-do-stash (notmuch-show-get-from)))

(defun notmuch-show-stash-message-id ()
  "Copy message ID of current message to kill-ring."
  (interactive)
  (notmuch-common-do-stash (notmuch-show-get-message-id)))

(defun notmuch-show-stash-message-id-stripped ()
  "Copy message ID of current message (sans `id:' prefix) to kill-ring."
  (interactive)
  (notmuch-common-do-stash (substring (notmuch-show-get-message-id) 4 -1)))

(defun notmuch-show-stash-subject ()
  "Copy Subject field of current message to kill-ring."
  (interactive)
  (notmuch-common-do-stash (notmuch-show-get-subject)))

(defun notmuch-show-stash-tags ()
  "Copy tags of current message to kill-ring as a comma separated list."
  (interactive)
  (notmuch-common-do-stash (mapconcat 'identity (notmuch-show-get-tags) ",")))

(defun notmuch-show-stash-to ()
  "Copy To address of current message to kill-ring."
  (interactive)
  (notmuch-common-do-stash (notmuch-show-get-to)))

;; Commands typically bound to buttons.

(defun notmuch-show-part-button-action (button)
  (let ((nth (button-get button :notmuch-part)))
    (if nth
	(notmuch-show-save-part (notmuch-show-get-message-id) nth
				(button-get button :notmuch-filename))
      (message "Not a valid part (is it a fake part?)."))))

;;

(provide 'notmuch-show)

debug log:

solving 2b0820e ...
found 2b0820e in https://yhetil.org/notmuch/1322271878-32614-3-git-send-email-dmitry.kurochkin@gmail.com/
found 7be88f8 in https://yhetil.org/notmuch.git/
preparing index
index prepared:
100644 7be88f828b97ad927ab20d4763914dd03b8ed645	emacs/notmuch-show.el

applying [1/1] https://yhetil.org/notmuch/1322271878-32614-3-git-send-email-dmitry.kurochkin@gmail.com/
diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index 7be88f8..2b0820e 100644

Checking patch emacs/notmuch-show.el...
Applied patch emacs/notmuch-show.el cleanly.

index at:
100644 2b0820e59f4c6fae0a24dc8bdfffef9f29180f53	emacs/notmuch-show.el

(*) 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://yhetil.org/notmuch.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).