unofficial mirror of notmuch@notmuchmail.org
 help / color / mirror / code / Atom feed
blob beb25382aa2fa9f5c91bc653e80b79bf6281c0f6 38297 bytes (raw)
name: emacs/notmuch-hello.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
 
;;; notmuch-hello.el --- welcome to notmuch, a frontend  -*- lexical-binding: t -*-
;;
;; 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 <https://www.gnu.org/licenses/>.
;;
;; Authors: David Edmondson <dme@dme.org>

;;; Code:

(require 'widget)
(require 'wid-edit) ; For `widget-forward'.

(require 'notmuch-lib)
(require 'notmuch-mua)

(declare-function notmuch-search "notmuch"
		  (&optional query oldest-first target-thread target-line
			     no-display))
(declare-function notmuch-poll "notmuch-lib" ())
(declare-function notmuch-tree "notmuch-tree"
		  (&optional query query-context target buffer-name
			     open-target unthreaded parent-buffer oldest-first))
(declare-function notmuch-unthreaded "notmuch-tree"
		  (&optional query query-context target buffer-name
			     open-target))


;;; Options

(defun notmuch-saved-search-get (saved-search field)
  "Get FIELD from SAVED-SEARCH.

If SAVED-SEARCH is a plist, this is just `plist-get', but for
backwards compatibility, this also deals with the two other
possible formats for SAVED-SEARCH: cons cells (NAME . QUERY) and
lists (NAME QUERY COUNT-QUERY)."
  (cond
   ((keywordp (car saved-search))
    (plist-get saved-search field))
   ;; It is not a plist so it is an old-style entry.
   ((consp (cdr saved-search))
    (pcase-let ((`(,name ,query ,count-query) saved-search))
      (cl-case field
	(:name name)
	(:query query)
	(:count-query count-query)
	(t nil))))
   (t
    (pcase-let ((`(,name . ,query) saved-search))
      (cl-case field
	(:name name)
	(:query query)
	(t nil))))))

(defun notmuch-hello-saved-search-to-plist (saved-search)
  "Return a copy of SAVED-SEARCH in plist form.

If saved search is a plist then just return a copy. In other
cases, for backwards compatibility, convert to plist form and
return that."
  (if (keywordp (car saved-search))
      (copy-sequence saved-search)
    (let ((fields (list :name :query :count-query))
	  plist-search)
      (dolist (field fields plist-search)
	(let ((string (notmuch-saved-search-get saved-search field)))
	  (when string
	    (setq plist-search (append plist-search (list field string)))))))))

(defun notmuch-hello--saved-searches-to-plist (symbol)
  "Extract a saved-search variable into plist form.

The new style saved search is just a plist, but for backwards
compatibility we use this function to extract old style saved
searches so they still work in customize."
  (let ((saved-searches (default-value symbol)))
    (mapcar #'notmuch-hello-saved-search-to-plist saved-searches)))

(define-widget 'notmuch-saved-search-plist 'list
  "A single saved search property list."
  :tag "Saved Search"
  :args '((list :inline t
		:format "%v"
		(group :format "%v" :inline t
		       (const :format "   Name: " :name)
		       (string :format "%v"))
		(group :format "%v" :inline t
		       (const :format "  Query: " :query)
		       (string :format "%v")))
	  (checklist :inline t
		     :format "%v"
		     (group :format "%v" :inline t
			    (const :format "Shortcut key: " :key)
			    (key-sequence :format "%v"))
		     (group :format "%v" :inline t
			    (const :format "Count-Query: " :count-query)
			    (string :format "%v"))
		     (group :format "%v" :inline t
			    (const :format "" :sort-order)
			    (choice :tag " Sort Order"
				    (const :tag "Default" nil)
				    (const :tag "Oldest-first" oldest-first)
				    (const :tag "Newest-first" newest-first)))
		     (group :format "%v" :inline t
			    (const :format "" :search-type)
			    (choice :tag " Search Type"
				    (const :tag "Search mode" nil)
				    (const :tag "Tree mode" tree)
				    (const :tag "Unthreaded mode" unthreaded))))))

(defcustom notmuch-saved-searches
  `((:name "inbox" :query "tag:inbox" :key ,(kbd "i"))
    (:name "unread" :query "tag:unread" :key ,(kbd "u"))
    (:name "flagged" :query "tag:flagged" :key ,(kbd "f"))
    (:name "sent" :query "tag:sent" :key ,(kbd "t"))
    (:name "drafts" :query "tag:draft" :key ,(kbd "d"))
    (:name "all mail" :query "*" :key ,(kbd "a")))
  "A list of saved searches to display.

The saved search can be given in 3 forms. The preferred way is as
a plist. Supported properties are

  :name            Name of the search (required).
  :query           Search to run (required).
  :key             Optional shortcut key for `notmuch-jump-search'.
  :count-query     Optional extra query to generate the count
                   shown. If not present then the :query property
                   is used.
  :sort-order      Specify the sort order to be used for the search.
                   Possible values are `oldest-first', `newest-first'
                   or nil. Nil means use the default sort order.
  :search-type     Specify whether to run the search in search-mode,
                   tree mode or unthreaded mode. Set to `tree' to
                   specify tree mode, 'unthreaded to specify
                   unthreaded mode, and set to nil (or anything
                   except tree and unthreaded) to specify search
                   mode.

Other accepted forms are a cons cell of the form (NAME . QUERY)
or a list of the form (NAME QUERY COUNT-QUERY)."
  ;; The saved-search format is also used by the all-tags notmuch-hello
  ;; section. This section generates its own saved-search list in one of
  ;; the latter two forms.
  :get 'notmuch-hello--saved-searches-to-plist
  :type '(repeat notmuch-saved-search-plist)
  :tag "List of Saved Searches"
  :group 'notmuch-hello)

(defcustom notmuch-hello-recent-searches-max 10
  "The number of recent searches to display."
  :type 'integer
  :group 'notmuch-hello)

(defcustom notmuch-show-empty-saved-searches nil
  "Should saved searches with no messages be listed?"
  :type 'boolean
  :group 'notmuch-hello)

(defun notmuch-sort-saved-searches (saved-searches)
  "Generate an alphabetically sorted saved searches list."
  (sort (copy-sequence saved-searches)
	(lambda (a b)
	  (string< (notmuch-saved-search-get a :name)
		   (notmuch-saved-search-get b :name)))))

(defcustom notmuch-saved-search-sort-function nil
  "Function used to sort the saved searches for the notmuch-hello view.

This variable controls how saved searches should be sorted. No
sorting (nil) displays the saved searches in the order they are
stored in `notmuch-saved-searches'. Sort alphabetically sorts the
saved searches in alphabetical order. Custom sort function should
be a function or a lambda expression that takes the saved
searches list as a parameter, and returns a new saved searches
list to be used. For compatibility with the various saved-search
formats it should use notmuch-saved-search-get to access the
fields of the search."
  :type '(choice (const :tag "No sorting" nil)
		 (const :tag "Sort alphabetically" notmuch-sort-saved-searches)
		 (function :tag "Custom sort function"
			   :value notmuch-sort-saved-searches))
  :group 'notmuch-hello)

(defvar notmuch-hello-indent 4
  "How much to indent non-headers.")

(defimage notmuch-hello-logo ((:type svg :file "notmuch-logo.svg")))

(defcustom notmuch-show-logo t
  "Should the notmuch logo be shown?"
  :type 'boolean
  :group 'notmuch-hello)

(defcustom notmuch-show-all-tags-list nil
  "Should all tags be shown in the notmuch-hello view?"
  :type 'boolean
  :group 'notmuch-hello)

(defcustom notmuch-hello-tag-list-make-query nil
  "Function or string to generate queries for the all tags list.

This variable controls which query results are shown for each tag
in the \"all tags\" list. If nil, it will use all messages with
that tag. If this is set to a string, it is used as a filter for
messages having that tag (equivalent to \"tag:TAG and (THIS-VARIABLE)\").
Finally this can be a function that will be called for each tag and
should return a filter for that tag, or nil to hide the tag."
  :type '(choice (const :tag "All messages" nil)
		 (const :tag "Unread messages" "tag:unread")
		 (string :tag "Custom filter"
			 :value "tag:unread")
		 (function :tag "Custom filter function"))
  :group 'notmuch-hello)

(defcustom notmuch-hello-hide-tags nil
  "List of tags to be hidden in the \"all tags\"-section."
  :type '(repeat string)
  :group 'notmuch-hello)

(defface notmuch-hello-logo-background
  '((((class color)
      (background dark))
     (:background "#5f5f5f"))
    (((class color)
      (background light))
     (:background "white")))
  "Background colour for the notmuch logo."
  :group 'notmuch-hello
  :group 'notmuch-faces)

(defcustom notmuch-column-control t
  "Controls the number of columns for saved searches/tags in notmuch view.

This variable has three potential sets of values:

- t: automatically calculate the number of columns possible based
  on the tags to be shown and the window width,
- an integer: a lower bound on the number of characters that will
  be used to display each column,
- a float: a fraction of the window width that is the lower bound
  on the number of characters that should be used for each
  column.

So:
- if you would like two columns of tags, set this to 0.5.
- if you would like a single column of tags, set this to 1.0.
- if you would like tags to be 30 characters wide, set this to
  30.
- if you don't want to worry about all of this nonsense, leave
  this set to `t'."
  :type '(choice
	  (const :tag "Automatically calculated" t)
	  (integer :tag "Number of characters")
	  (float :tag "Fraction of window"))
  :group 'notmuch-hello)

(defcustom notmuch-hello-thousands-separator " "
  "The string used as a thousands separator.

Typically \",\" in the US and UK and \".\" or \" \" in Europe.
The latter is recommended in the SI/ISO 31-0 standard and by the
International Bureau of Weights and Measures."
  :type 'string
  :group 'notmuch-hello)

(defcustom notmuch-hello-mode-hook nil
  "Functions called after entering `notmuch-hello-mode'."
  :type 'hook
  :group 'notmuch-hello
  :group 'notmuch-hooks)

(defcustom notmuch-hello-refresh-hook nil
  "Functions called after updating a `notmuch-hello' buffer."
  :type 'hook
  :group 'notmuch-hello
  :group 'notmuch-hooks)

(defconst notmuch-hello-url "https://notmuchmail.org"
  "The `notmuch' web site.")

(defvar notmuch-hello-custom-section-options
  '((:filter (string :tag "Filter for each tag"))
    (:filter-count (string :tag "Different filter to generate message counts"))
    (:initially-hidden (const :tag "Hide this section on startup" t))
    (:show-empty-searches (const :tag "Show queries with no matching messages" t))
    (:hide-if-empty (const :tag "Hide this section if all queries are empty
\(and not shown by show-empty-searches)" t)))
  "Various customization-options for notmuch-hello-tags/query-section.")

(define-widget 'notmuch-hello-tags-section 'lazy
  "Customize-type for notmuch-hello tag-list sections."
  :tag "Customized tag-list section (see docstring for details)"
  :type
  `(list :tag ""
	 (const :tag "" notmuch-hello-insert-tags-section)
	 (string :tag "Title for this section")
	 (plist
	  :inline t
	  :options
	  ,(append notmuch-hello-custom-section-options
		   '((:hide-tags (repeat :tag "Tags that will be hidden"
					 string)))))))

(define-widget 'notmuch-hello-query-section 'lazy
  "Customize-type for custom saved-search-like sections"
  :tag "Customized queries section (see docstring for details)"
  :type
  `(list :tag ""
	 (const :tag "" notmuch-hello-insert-searches)
	 (string :tag "Title for this section")
	 (repeat :tag "Queries"
		 (cons (string :tag "Name") (string :tag "Query")))
	 (plist :inline t :options ,notmuch-hello-custom-section-options)))

(defcustom notmuch-hello-sections
  (list #'notmuch-hello-insert-header
	#'notmuch-hello-insert-saved-searches
	#'notmuch-hello-insert-search
	#'notmuch-hello-insert-recent-searches
	#'notmuch-hello-insert-alltags
	#'notmuch-hello-insert-footer)
  "Sections for notmuch-hello.

The list contains functions which are used to construct sections in
notmuch-hello buffer.  When notmuch-hello buffer is constructed,
these functions are run in the order they appear in this list.  Each
function produces a section simply by adding content to the current
buffer.  A section should not end with an empty line, because a
newline will be inserted after each section by `notmuch-hello'.

Each function should take no arguments. The return value is
ignored.

For convenience an element can also be a list of the form (FUNC ARG1
ARG2 .. ARGN) in which case FUNC will be applied to the rest of the
list.

A \"Customized tag-list section\" item in the customize-interface
displays a list of all tags, optionally hiding some of them. It
is also possible to filter the list of messages matching each tag
by an additional filter query. Similarly, the count of messages
displayed next to the buttons can be generated by applying a
different filter to the tag query. These filters are also
supported for \"Customized queries section\" items."
  :group 'notmuch-hello
  :type
  '(repeat
    (choice (function-item notmuch-hello-insert-header)
	    (function-item notmuch-hello-insert-saved-searches)
	    (function-item notmuch-hello-insert-search)
	    (function-item notmuch-hello-insert-recent-searches)
	    (function-item notmuch-hello-insert-alltags)
	    (function-item notmuch-hello-insert-footer)
	    (function-item notmuch-hello-insert-inbox)
	    notmuch-hello-tags-section
	    notmuch-hello-query-section
	    (function :tag "Custom section"))))

(defcustom notmuch-hello-auto-refresh t
  "Automatically refresh when returning to the notmuch-hello buffer."
  :group 'notmuch-hello
  :type 'boolean)

;;; Internal variables

(defvar notmuch-hello-hidden-sections nil
  "List of sections titles whose contents are hidden.")

(defvar notmuch-hello-first-run t
  "True if `notmuch-hello' is run for the first time, set to nil afterwards.")

;;; Widgets for inserters

(define-widget 'notmuch-search-item 'item
  "A recent search."
  :format "%v\n"
  :value-create 'notmuch-search-item-value-create)

(defun notmuch-search-item-value-create (widget)
  (let ((value (widget-get widget :value)))
    (widget-insert (make-string notmuch-hello-indent ?\s))
    (widget-create 'editable-field
		   :size (widget-get widget :size)
		   :parent widget
		   :action #'notmuch-hello-search
		   value)
    (widget-insert " ")
    (widget-create 'push-button
		   :parent widget
		   :notify #'notmuch-hello-add-saved-search
		   "save")
    (widget-insert " ")
    (widget-create 'push-button
		   :parent widget
		   :notify #'notmuch-hello-delete-search-from-history
		   "del")))

(defun notmuch-search-item-field-width ()
  (max 8 ; Don't let the search boxes be less than 8 characters wide.
       (- (window-width)
	  notmuch-hello-indent ; space at bol
	  notmuch-hello-indent ; space at eol
	  1    ; for the space before the [save] button
	  6    ; for the [save] button
	  1    ; for the space before the [del] button
	  5))) ; for the [del] button

;;; Widget actions

(defun notmuch-hello-search (widget &rest _event)
  (let ((search (widget-value widget)))
    (when search
      (setq search (string-trim search))
      (let ((history-delete-duplicates t))
	(add-to-history 'notmuch-search-history search)))
    (notmuch-search search notmuch-search-oldest-first)))

(defun notmuch-hello-add-saved-search (widget &rest _event)
  (let ((search (widget-value (widget-get widget :parent)))
	(name (completing-read "Name for saved search: "
			       notmuch-saved-searches)))
    ;; If an existing saved search with this name exists, remove it.
    (setq notmuch-saved-searches
	  (cl-loop for elem in notmuch-saved-searches
		   unless (equal name (notmuch-saved-search-get elem :name))
		   collect elem))
    ;; Add the new one.
    (customize-save-variable 'notmuch-saved-searches
			     (add-to-list 'notmuch-saved-searches
					  (list :name name :query search) t))
    (message "Saved '%s' as '%s'." search name)
    (notmuch-hello-update)))

(defun notmuch-hello-delete-search-from-history (widget &rest _event)
  (when (y-or-n-p "Are you sure you want to delete this search? ")
    (let ((search (widget-value (widget-get widget :parent))))
      (setq notmuch-search-history
	    (delete search notmuch-search-history)))
    (notmuch-hello-update)))

;;; Button utilities

;; `notmuch-hello-query-counts', `notmuch-hello-nice-number' and
;; `notmuch-hello-insert-buttons' are used outside this section.
;; All other functions that are defined in this section are only
;; used by these two functions.

(defun notmuch-hello-longest-label (searches-alist)
  (or (cl-loop for elem in searches-alist
	       maximize (length (notmuch-saved-search-get elem :name)))
      0))

(defun notmuch-hello-reflect-generate-row (ncols nrows row list)
  (let ((len (length list)))
    (cl-loop for col from 0 to (- ncols 1)
	     collect (let ((offset (+ (* nrows col) row)))
		       (if (< offset len)
			   (nth offset list)
			 ;; Don't forget to insert an empty slot in the
			 ;; output matrix if there is no corresponding
			 ;; value in the input matrix.
			 nil)))))

(defun notmuch-hello-reflect (list ncols)
  "Reflect a `ncols' wide matrix represented by `list' along the
diagonal."
  ;; Not very lispy...
  (let ((nrows (ceiling (length list) ncols)))
    (cl-loop for row from 0 to (- nrows 1)
	     append (notmuch-hello-reflect-generate-row ncols nrows row list))))

(defun notmuch-hello-widget-search (widget &rest _ignore)
  (cl-case (widget-get widget :notmuch-search-type)
   (tree
    (let ((n (notmuch-search-format-buffer-name (widget-value widget) "tree" t)))
      (notmuch-tree (widget-get widget :notmuch-search-terms)
		    nil nil n nil nil nil
		    (widget-get widget :notmuch-search-oldest-first))))
   (unthreaded
    (let ((n (notmuch-search-format-buffer-name (widget-value widget)
						"unthreaded" t)))
      (notmuch-unthreaded (widget-get widget :notmuch-search-terms) nil nil n)))
   (t
    (notmuch-search (widget-get widget :notmuch-search-terms)
		    (widget-get widget :notmuch-search-oldest-first)))))

(defun notmuch-saved-search-count (search)
  (car (notmuch--process-lines notmuch-command "count" search)))

(defun notmuch-hello-tags-per-line (widest)
  "Determine how many tags to show per line and how wide they
should be. Returns a cons cell `(tags-per-line width)'."
  (let ((tags-per-line
	 (cond
	  ((integerp notmuch-column-control)
	   (max 1
		(/ (- (window-width) notmuch-hello-indent)
		   ;; Count is 9 wide (8 digits plus space), 1 for the space
		   ;; after the name.
		   (+ 9 1 (max notmuch-column-control widest)))))
	  ((floatp notmuch-column-control)
	   (let* ((available-width (- (window-width) notmuch-hello-indent))
		  (proposed-width (max (* available-width notmuch-column-control)
				       widest)))
	     (floor available-width proposed-width)))
	  (t
	   (max 1
		(/ (- (window-width) notmuch-hello-indent)
		   ;; Count is 9 wide (8 digits plus space), 1 for the space
		   ;; after the name.
		   (+ 9 1 widest)))))))
    (cons tags-per-line (/ (max 1
				(- (window-width) notmuch-hello-indent
				   ;; Count is 9 wide (8 digits plus
				   ;; space), 1 for the space after the
				   ;; name.
				   (* tags-per-line (+ 9 1))))
			   tags-per-line))))

(defun notmuch-hello-filtered-query (query filter)
  "Constructs a query to search all messages matching QUERY and FILTER.

If FILTER is a string, it is directly used in the returned query.

If FILTER is a function, it is called with QUERY as a parameter and
the string it returns is used as the query. If nil is returned,
the entry is hidden.

Otherwise, FILTER is ignored."
  (cond
   ((functionp filter) (funcall filter query))
   ((stringp filter)
    (concat "(" query ") and (" filter ")"))
   (t query)))

(defun notmuch-hello-query-counts (query-list &rest options)
  "Compute list of counts of matched messages from QUERY-LIST.

QUERY-LIST must be a list of saved-searches. Ideally each of
these is a plist but other options are available for backwards
compatibility: see `notmuch-saved-searches' for details.

The result is a list of plists each of which includes the
properties :name NAME, :query QUERY and :count COUNT, together
with any properties in the original saved-search.

The values :show-empty-searches, :filter and :filter-count from
options will be handled as specified for
`notmuch-hello-insert-searches'. :disable-includes can be used to
turn off the default exclude processing in `notmuch-count(1)'"
  (with-temp-buffer
    (dolist (elem query-list nil)
      (let ((count-query (or (notmuch-saved-search-get elem :count-query)
			     (notmuch-saved-search-get elem :query))))
	(insert
	 (replace-regexp-in-string
	  "\n" " "
	  (notmuch-hello-filtered-query count-query
					(or (plist-get options :filter-count)
					    (plist-get options :filter))))
	 "\n")))
    (unless (= (notmuch--call-process-region (point-min) (point-max) notmuch-command
					     t t nil "count"
					     (if (plist-get options :disable-excludes)
						 "--exclude=false"
					       "--exclude=true")
					     "--batch") 0)
      (notmuch-logged-error
       "notmuch count --batch failed"
       "Please check that the notmuch CLI is new enough to support `count
--batch'. In general we recommend running matching versions of
the CLI and emacs interface."))
    (goto-char (point-min))
    (cl-mapcan
     (lambda (elem)
       (let* ((elem-plist (notmuch-hello-saved-search-to-plist elem))
	      (search-query (plist-get elem-plist :query))
	      (filtered-query (notmuch-hello-filtered-query
			       search-query (plist-get options :filter)))
	      (message-count (prog1 (read (current-buffer))
			       (forward-line 1))))
	 (when (and filtered-query (or (plist-get options :show-empty-searches)
				       (> message-count 0)))
	   (setq elem-plist (plist-put elem-plist :query filtered-query))
	   (list (plist-put elem-plist :count message-count)))))
     query-list)))

(defun notmuch-hello-nice-number (n)
  (let (result)
    (while (> n 0)
      (push (% n 1000) result)
      (setq n (/ n 1000)))
    (setq result (or result '(0)))
    (apply #'concat
	   (number-to-string (car result))
	   (mapcar (lambda (elem)
		     (format "%s%03d" notmuch-hello-thousands-separator elem))
		   (cdr result)))))

(defun notmuch-hello-insert-buttons (searches)
  "Insert buttons for SEARCHES.

SEARCHES must be a list of plists each of which should contain at
least the properties :name NAME :query QUERY and :count COUNT,
where QUERY is the query to start when the button for the
corresponding entry is activated, and COUNT should be the number
of messages matching the query.  Such a plist can be computed
with `notmuch-hello-query-counts'."
  (let* ((widest (notmuch-hello-longest-label searches))
	 (tags-and-width (notmuch-hello-tags-per-line widest))
	 (tags-per-line (car tags-and-width))
	 (column-width (cdr tags-and-width))
	 (column-indent 0)
	 (count 0)
	 (reordered-list (notmuch-hello-reflect searches tags-per-line))
	 ;; Hack the display of the buttons used.
	 (widget-push-button-prefix "")
	 (widget-push-button-suffix ""))
    ;; dme: It feels as though there should be a better way to
    ;; implement this loop than using an incrementing counter.
    (mapc (lambda (elem)
	    ;; (not elem) indicates an empty slot in the matrix.
	    (when elem
	      (when (> column-indent 0)
		(widget-insert (make-string column-indent ? )))
	      (let* ((name (plist-get elem :name))
		     (query (plist-get elem :query))
		     (oldest-first (cl-case (plist-get elem :sort-order)
				     (newest-first nil)
				     (oldest-first t)
				     (otherwise notmuch-search-oldest-first)))
		     (search-type (plist-get elem :search-type))
		     (msg-count (plist-get elem :count)))
		(widget-insert (format "%8s "
				       (notmuch-hello-nice-number msg-count)))
		(widget-create 'push-button
			       :notify #'notmuch-hello-widget-search
			       :notmuch-search-terms query
			       :notmuch-search-oldest-first oldest-first
			       :notmuch-search-type search-type
			       name)
		(setq column-indent
		      (1+ (max 0 (- column-width (length name)))))))
	    (cl-incf count)
	    (when (eq (% count tags-per-line) 0)
	      (setq column-indent 0)
	      (widget-insert "\n")))
	  reordered-list)
    ;; If the last line was not full (and hence did not include a
    ;; carriage return), insert one now.
    (unless (eq (% count tags-per-line) 0)
      (widget-insert "\n"))))

;;; Mode

(defun notmuch-hello-update ()
  "Update the notmuch-hello buffer."
  ;; Lazy - rebuild everything.
  (interactive)
  (notmuch-hello t))

(defun notmuch-hello-window-configuration-change ()
  "Hook function to update the hello buffer when it is switched to."
  (let ((hello-buf (get-buffer "*notmuch-hello*"))
	(do-refresh nil))
    ;; Consider all windows in the currently selected frame, since
    ;; that's where the configuration change happened.  This also
    ;; refreshes our snapshot of all windows, so we have to do this
    ;; even if we know we won't refresh (e.g., hello-buf is null).
    (dolist (window (window-list))
      (let ((last-buf (window-parameter window 'notmuch-hello-last-buffer))
	    (cur-buf (window-buffer window)))
	(unless (eq last-buf cur-buf)
	  ;; This window changed or is new.  Update recorded buffer
	  ;; for next time.
	  (set-window-parameter window 'notmuch-hello-last-buffer cur-buf)
	  (when (and (eq cur-buf hello-buf) last-buf)
	    ;; The user just switched to hello in this window (hello
	    ;; is currently visible, was not visible on the last
	    ;; configuration change, and this is not a new window)
	    (setq do-refresh t)))))
    (when (and do-refresh notmuch-hello-auto-refresh)
      ;; Refresh hello as soon as we get back to redisplay.  On Emacs
      ;; 24, we can't do it right here because something in this
      ;; hook's call stack overrides hello's point placement.
      ;; FIXME And on Emacs releases that we still support?
      (run-at-time nil nil #'notmuch-hello t))
    (unless hello-buf
      ;; Clean up hook
      (remove-hook 'window-configuration-change-hook
		   #'notmuch-hello-window-configuration-change))))

(defvar notmuch-hello-mode-map
  ;; Inherit both widget-keymap and notmuch-common-keymap.  We have
  ;; to use make-sparse-keymap to force this to be a new keymap (so
  ;; that when we modify map it does not modify widget-keymap).
  (let ((map (make-composed-keymap (list (make-sparse-keymap) widget-keymap))))
    (set-keymap-parent map notmuch-common-keymap)
    map)
  "Keymap for \"notmuch hello\" buffers.")

(define-derived-mode notmuch-hello-mode fundamental-mode "notmuch-hello"
  "Major mode for convenient notmuch navigation. This is your entry portal into notmuch.

Saved searches are \"bookmarks\" for arbitrary queries. Hit RET
or click on a saved search to view matching threads. Edit saved
searches with the `edit' button. Type `\\[notmuch-jump-search]'
in any Notmuch screen for quick access to saved searches that
have shortcut keys.

Type new searches in the search box and hit RET to view matching
threads. Hit RET in a recent search box to re-submit a previous
search. Edit it first if you like. Save a recent search to saved
searches with the `save' button.

Hit `\\[notmuch-search]' or `\\[notmuch-tree]' in any Notmuch
screen to search for messages and view matching threads or
messages, respectively. Recent searches are available in the
minibuffer history.

Expand the all tags view with the `show' button (and collapse
again with the `hide' button). Hit RET or click on a tag name to
view matching threads.

Hit `\\[notmuch-refresh-this-buffer]' to refresh the screen and
`\\[notmuch-bury-or-kill-this-buffer]' to quit.

The screen may be customized via `\\[customize]'.

Complete list of currently available key bindings:

\\{notmuch-hello-mode-map}"
  (setq notmuch-buffer-refresh-function #'notmuch-hello-update))

;;; Inserters

(defun notmuch-hello-generate-tag-alist (&optional hide-tags)
  "Return an alist from tags to queries to display in the all-tags section."
  (cl-mapcan (lambda (tag)
	       (and (not (member tag hide-tags))
		    (list (cons tag
				(concat "tag:"
					(notmuch-escape-boolean-term tag))))))
	     (notmuch--process-lines notmuch-command "search" "--output=tags" "*")))

(defun notmuch-hello-insert-header ()
  "Insert the default notmuch-hello header."
  (when notmuch-show-logo
    (let ((image notmuch-hello-logo))
      ;; The notmuch logo uses transparency. That can display poorly
      ;; when inserting the image into an emacs buffer (black logo on
      ;; a black background), so force the background colour of the
      ;; image. We use a face to represent the colour so that
      ;; `defface' can be used to declare the different possible
      ;; colours, which depend on whether the frame has a light or
      ;; dark background.
      (setq image (cons 'image
			(append (cdr image)
				(list :background
				      (face-background
				       'notmuch-hello-logo-background)))))
      (insert-image image))
    (widget-insert "  "))

  (widget-insert "Welcome to ")
  ;; Hack the display of the links used.
  (let ((widget-link-prefix "")
	(widget-link-suffix ""))
    (widget-create 'link
		   :notify (lambda (&rest _ignore)
			     (browse-url notmuch-hello-url))
		   :help-echo "Visit the notmuch website."
		   "notmuch")
    (widget-insert ". ")
    (widget-insert "You have ")
    (widget-create 'link
		   :notify (lambda (&rest _ignore)
			     (notmuch-hello-update))
		   :help-echo "Refresh"
		   (notmuch-hello-nice-number
		    (string-to-number
		     (car (notmuch--process-lines notmuch-command "count" "--exclude=false")))))
    (widget-insert " messages.\n")))

(defun notmuch-hello-insert-saved-searches ()
  "Insert the saved-searches section."
  (let ((searches (notmuch-hello-query-counts
		   (if notmuch-saved-search-sort-function
		       (funcall notmuch-saved-search-sort-function
				notmuch-saved-searches)
		     notmuch-saved-searches)
		   :show-empty-searches notmuch-show-empty-saved-searches)))
    (when searches
      (widget-insert "Saved searches: ")
      (widget-create 'push-button
		     :notify (lambda (&rest _ignore)
			       (customize-variable 'notmuch-saved-searches))
		     "edit")
      (widget-insert "\n\n")
      (let ((start (point)))
	(notmuch-hello-insert-buttons searches)
	(indent-rigidly start (point) notmuch-hello-indent)))))

(defun notmuch-hello-insert-search ()
  "Insert a search widget."
  (widget-insert "Search: ")
  (widget-create 'editable-field
		 ;; Leave some space at the start and end of the
		 ;; search boxes.
		 :size (max 8 (- (window-width) notmuch-hello-indent
				 (length "Search: ")))
		 :action #'notmuch-hello-search)
  ;; Add an invisible dot to make `widget-end-of-line' ignore
  ;; trailing spaces in the search widget field.  A dot is used
  ;; instead of a space to make `show-trailing-whitespace'
  ;; happy, i.e. avoid it marking the whole line as trailing
  ;; spaces.
  (widget-insert (propertize "." 'invisible t))
  (widget-insert "\n"))

(defun notmuch-hello-insert-recent-searches ()
  "Insert recent searches."
  (when notmuch-search-history
    (widget-insert "Recent searches: ")
    (widget-create
     'push-button
     :notify (lambda (&rest _ignore)
	       (when (y-or-n-p "Are you sure you want to clear the searches? ")
		 (setq notmuch-search-history nil)
		 (notmuch-hello-update)))
     "clear")
    (widget-insert "\n\n")
    (let ((width (notmuch-search-item-field-width)))
      (dolist (search (seq-take notmuch-search-history
				notmuch-hello-recent-searches-max))
	(widget-create 'notmuch-search-item :value search :size width)))))

(defun notmuch-hello-insert-searches (title query-list &rest options)
  "Insert a section with TITLE showing a list of buttons made from QUERY-LIST.

QUERY-LIST should ideally be a plist but for backwards
compatibility other forms are also accepted (see
`notmuch-saved-searches' for details).  The plist should
contain keys :name and :query; if :count-query is also present
then it specifies an alternate query to be used to generate the
count for the associated search.

Supports the following entries in OPTIONS as a plist:
:initially-hidden - if non-nil, section will be hidden on startup
:show-empty-searches - show buttons with no matching messages
:hide-if-empty - hide if no buttons would be shown
   (only makes sense without :show-empty-searches)
:filter - This can be a function that takes the search query as its argument and
   returns a filter to be used in conjunction with the query for that search or nil
   to hide the element. This can also be a string that is used as a combined with
   each query using \"and\".
:filter-count - Separate filter to generate the count displayed each search. Accepts
   the same values as :filter. If :filter and :filter-count are specified, this
   will be used instead of :filter, not in conjunction with it."
  (widget-insert title ": ")
  (when (and notmuch-hello-first-run (plist-get options :initially-hidden))
    (add-to-list 'notmuch-hello-hidden-sections title))
  (let ((is-hidden (member title notmuch-hello-hidden-sections))
	(start (point)))
    (if is-hidden
	(widget-create 'push-button
		       :notify (lambda (&rest _ignore)
				 (setq notmuch-hello-hidden-sections
				       (delete title notmuch-hello-hidden-sections))
				 (notmuch-hello-update))
		       "show")
      (widget-create 'push-button
		     :notify (lambda (&rest _ignore)
			       (add-to-list 'notmuch-hello-hidden-sections
					    title)
			       (notmuch-hello-update))
		     "hide"))
    (widget-insert "\n")
    (unless is-hidden
      (let ((searches (apply 'notmuch-hello-query-counts query-list options)))
	(when (or (not (plist-get options :hide-if-empty))
		  searches)
	  (widget-insert "\n")
	  (notmuch-hello-insert-buttons searches)
	  (indent-rigidly start (point) notmuch-hello-indent))))))

(defun notmuch-hello-insert-tags-section (&optional title &rest options)
  "Insert a section displaying all tags with message counts.

TITLE defaults to \"All tags\".
Allowed options are those accepted by `notmuch-hello-insert-searches' and the
following:

:hide-tags - List of tags that should be excluded."
  (apply 'notmuch-hello-insert-searches
	 (or title "All tags")
	 (notmuch-hello-generate-tag-alist (plist-get options :hide-tags))
	 options))

(defun notmuch-hello-insert-inbox ()
  "Show an entry for each saved search and inboxed messages for each tag."
  (notmuch-hello-insert-searches "What's in your inbox"
				 (append
				  notmuch-saved-searches
				  (notmuch-hello-generate-tag-alist))
				 :filter "tag:inbox"))

(defun notmuch-hello-insert-alltags ()
  "Insert a section displaying all tags and associated message counts."
  (notmuch-hello-insert-tags-section
   nil
   :initially-hidden (not notmuch-show-all-tags-list)
   :hide-tags notmuch-hello-hide-tags
   :filter notmuch-hello-tag-list-make-query
   :disable-excludes t))

(defun notmuch-hello-insert-footer ()
  "Insert the notmuch-hello footer."
  (let ((start (point)))
    (widget-insert "Hit `?' for context-sensitive help in any Notmuch screen.\n")
    (widget-insert "Customize ")
    (widget-create 'link
		   :notify (lambda (&rest _ignore)
			     (customize-group 'notmuch))
		   :button-prefix "" :button-suffix ""
		   "Notmuch")
    (widget-insert " or ")
    (widget-create 'link
		   :notify (lambda (&rest _ignore)
			     (customize-variable 'notmuch-hello-sections))
		   :button-prefix "" :button-suffix ""
		   "this page.")
    (let ((fill-column (- (window-width) notmuch-hello-indent)))
      (center-region start (point)))))

;;; Hello!

;;;###autoload
(defun notmuch-hello (&optional no-display)
  "Run notmuch and display saved searches, known tags, etc."
  (interactive)
  (notmuch-assert-cli-sane)
  ;; This may cause a window configuration change, so if the
  ;; auto-refresh hook is already installed, avoid recursive refresh.
  (let ((notmuch-hello-auto-refresh nil))
    (if no-display
	(set-buffer "*notmuch-hello*")
      (pop-to-buffer-same-window "*notmuch-hello*")))
  ;; Install auto-refresh hook
  (when notmuch-hello-auto-refresh
    (add-hook 'window-configuration-change-hook
	      #'notmuch-hello-window-configuration-change))
  (let ((target-line (line-number-at-pos))
	(target-column (current-column))
	(inhibit-read-only t))
    ;; Delete all editable widget fields.  Editable widget fields are
    ;; tracked in a buffer local variable `widget-field-list' (and
    ;; others).  If we do `erase-buffer' without properly deleting the
    ;; widgets, some widget-related functions are confused later.
    (mapc 'widget-delete widget-field-list)
    (erase-buffer)
    (unless (eq major-mode 'notmuch-hello-mode)
      (notmuch-hello-mode))
    (let ((all (overlay-lists)))
      ;; Delete all the overlays.
      (mapc 'delete-overlay (car all))
      (mapc 'delete-overlay (cdr all)))
    (mapc
     (lambda (section)
       (let ((point-before (point)))
	 (if (functionp section)
	     (funcall section)
	   (apply (car section) (cdr section)))
	 ;; don't insert a newline when the previous section didn't
	 ;; show anything.
	 (unless (eq (point) point-before)
	   (widget-insert "\n"))))
     notmuch-hello-sections)
    (widget-setup)
    ;; Move point back to where it was before refresh. Use line and
    ;; column instead of point directly to be insensitive to additions
    ;; and removals of text within earlier lines.
    (goto-char (point-min))
    (forward-line (1- target-line))
    (move-to-column target-column))
  (run-hooks 'notmuch-hello-refresh-hook)
  (setq notmuch-hello-first-run nil))

;;; _

(provide 'notmuch-hello)

;;; notmuch-hello.el ends here

debug log:

solving beb25382 ...
found beb25382 in https://yhetil.org/notmuch.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://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).