lisp/gnus/gnus-cus.el

   1 ;;; gnus-cus.el --- customization commands for Gnus
   2
   3 ;; Copyright (C) 1996, 1999-2018 Free Software Foundation, Inc.
   4
   5 ;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
   6 ;; Keywords: news
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;;; Code:
  26
  27 (require 'wid-edit)
  28 (require 'gnus)
  29 (require 'gnus-agent)
  30 (require 'gnus-score)
  31 (require 'gnus-topic)
  32 (require 'gnus-art)
  33
  34 ;;; Widgets:
  35
  36 (define-derived-mode gnus-custom-mode fundamental-mode "Gnus Customize"
  37   "Major mode for editing Gnus customization buffers.
  38
  39 The following commands are available:
  40
  41 \\[widget-forward]              Move to next button or editable field.
  42 \\[widget-backward]             Move to previous button or editable field.
  43 \\[widget-button-click]         Activate button under the mouse pointer.
  44 \\[widget-button-press]         Activate button under point.
  45
  46 Entry to this mode calls the value of `gnus-custom-mode-hook'
  47 if that value is non-nil."
  48   (use-local-map widget-keymap)
  49   ;; Emacs stuff:
  50   (when (and (facep 'custom-button-face)
  51              (facep 'custom-button-pressed-face))
  52     (set (make-local-variable 'widget-button-face)
  53          'custom-button-face)
  54     (set (make-local-variable 'widget-button-pressed-face)
  55          'custom-button-pressed-face)
  56     (set (make-local-variable 'widget-mouse-face)
  57          'custom-button-pressed-face))
  58   (when (and (boundp 'custom-raised-buttons)
  59              (symbol-value 'custom-raised-buttons))
  60     (set (make-local-variable 'widget-push-button-prefix) "")
  61     (set (make-local-variable 'widget-push-button-suffix) "")
  62     (set (make-local-variable 'widget-link-prefix) "")
  63     (set (make-local-variable 'widget-link-suffix) "")))
  64
  65 ;;; Group Customization:
  66
  67 (defconst gnus-group-parameters
  68   '((extra-aliases (choice
  69                     :tag "Extra Aliases"
  70                     (list
  71                      :tag "List"
  72                      (editable-list
  73                       :inline t
  74                       (gnus-email-address :tag "Address")))
  75                     (gnus-email-address :tag "Address")) "\
  76 Store messages posted from or to this address in this group.
  77
  78 You must be using gnus-group-split for this to work.  The VALUE of the
  79 nnmail-split-fancy SPLIT generated for this group will match these
  80 addresses.")
  81
  82     (split-regexp (regexp :tag "gnus-group-split Regular Expression") "\
  83 Like gnus-group-split Address, but expects a regular expression.")
  84
  85     (split-exclude (list :tag "gnus-group-split Restricts"
  86                          (editable-list
  87                           :inline t (regexp :tag "Restrict"))) "\
  88 Regular expression that cancels gnus-group-split matches.
  89
  90 Each entry is added to the nnmail-split-fancy SPLIT as a separate
  91 RESTRICT clause.")
  92
  93     (split-spec (choice :tag "gnus-group-split Overrider"
  94                         (sexp :tag "Fancy Split")
  95                         (const :tag "Catch All" catch-all)
  96                         (const :tag "Ignore" nil)) "\
  97 Override all other gnus-group-split fields.
  98
  99 In `Fancy Split', you can enter any nnmail-split-fancy SPLIT.  Note
 100 that the name of this group won't be automatically assumed, you have
 101 to add it to the SPLITs yourself.  This means you can use such splits
 102 to split messages to other groups too.
 103
 104 If you select `Catch All', this group will get postings for any
 105 messages not matched in any other group.  It overrides the variable
 106 gnus-group-split-default-catch-all-group.
 107
 108 Selecting `Ignore' forces no SPLIT to be generated for this group,
 109 disabling all other gnus-group-split fields.")
 110
 111     (broken-reply-to (const :tag "Broken Reply To" t) "\
 112 Ignore `Reply-To' headers in this group.
 113
 114 That can be useful if you're reading a mailing list group where the
 115 listserv has inserted `Reply-To' headers that point back to the
 116 listserv itself.  This is broken behavior.  So there!")
 117
 118     (to-group (string :tag "To Group") "\
 119 All posts will be sent to the specified group.")
 120
 121     (gcc-self (choice :tag  "GCC"
 122                       :value t
 123                       (const :tag "To current group" t)
 124                       (const none)
 125                       (string :format "%v" :hide-front-space t)) "\
 126 Specify default value for GCC header.
 127
 128 If this symbol is present in the group parameter list and set to t,
 129 new composed messages will be `Gcc''d to the current group.  If it is
 130 present and set to `none', no `Gcc:' header will be generated, if it
 131 is present and a string, this string will be inserted literally as a
 132 `gcc' header (this symbol takes precedence over any default `Gcc'
 133 rules as described later).")
 134
 135     (expiry-wait (choice :tag  "Expire Wait"
 136                          :value never
 137                          (const never)
 138                          (const immediate)
 139                          (number :hide-front-space t
 140                                  :format "%v")) "\
 141 When to expire.
 142
 143 Overrides any `nnmail-expiry-wait' and `nnmail-expiry-wait-function'
 144 when expiring expirable messages.  The value can either be a number of
 145 days (not necessarily an integer) or the symbols `never' or
 146 `immediate'.")
 147
 148     (expiry-target (choice :tag "Expiry Target"
 149                            :value delete
 150                            (const delete)
 151                            (function :format "%v" nnmail-)
 152                            string) "\
 153 Where expired messages end up.
 154
 155 Overrides `nnmail-expiry-target'.")
 156
 157     (score-file (file :tag "Score File") "\
 158 Make the specified file into the current score file.
 159 This means that all score commands you issue will end up in this file.")
 160
 161     (adapt-file (file :tag "Adapt File") "\
 162 Make the specified file into the current adaptive file.
 163 All adaptive score entries will be put into this file.")
 164
 165     (admin-address (gnus-email-address :tag "Admin Address") "\
 166 Administration address for a mailing list.
 167
 168 When unsubscribing to a mailing list you should never send the
 169 unsubscription notice to the mailing list itself.  Instead, you'd
 170 send messages to the administrative address.  This parameter allows
 171 you to put the admin address somewhere convenient.")
 172
 173     (display (choice :tag "Display"
 174                      :value default
 175                      (const all)
 176                      (integer)
 177                      (const default)
 178                      (sexp  :tag "Other")) "\
 179 Which articles to display on entering the group.
 180
 181 `all'
 182      Display all articles, both read and unread.
 183
 184 `integer'
 185      Display the last NUMBER articles in the group.  This is the same as
 186      entering the group with C-u NUMBER.
 187
 188 `default'
 189      Display the default visible articles, which normally includes
 190      unread and ticked articles.
 191
 192 `Other'
 193      Display the articles that satisfy the S-expression. The S-expression
 194      should be in an array form.")
 195
 196     (comment (string :tag  "Comment") "\
 197 An arbitrary comment on the group.")
 198
 199     (visible (const :tag "Permanently visible" t) "\
 200 Always display this group, even when there are no unread articles in it.")
 201
 202     (highlight-words
 203      (choice :tag "Highlight words"
 204              :value nil
 205              (repeat (list (regexp :tag "Highlight regexp")
 206                            (number :tag "Group for entire word" 0)
 207                            (number :tag "Group for displayed part" 0)
 208                            (symbol :tag "Face"
 209                                    gnus-emphasis-highlight-words))))
 210      "highlight regexps.
 211 See `gnus-emphasis-alist'.")
 212
 213     (posting-style
 214      (choice :tag "Posting style"
 215              :value nil
 216              (repeat (list
 217                       (choice :tag "Type"
 218                               :value nil
 219                               (const signature)
 220                               (const signature-file)
 221                               (const organization)
 222                               (const address)
 223                               (const x-face-file)
 224                               (const name)
 225                               (const body)
 226                               (symbol)
 227                               (string :tag "Header"))
 228                       (string :format "%v"))))
 229      "post style.
 230 See `gnus-posting-styles'."))
 231   "Alist of valid group or topic parameters.
 232
 233 Each entry has the form (NAME TYPE DOC), where NAME is the parameter
 234 itself (a symbol), TYPE is the parameters type (a sexp widget), and
 235 DOC is a documentation string for the parameter.")
 236
 237 (defconst gnus-extra-topic-parameters
 238   '((subscribe (regexp :tag "Subscribe") "\
 239 If `gnus-subscribe-newsgroup-method' or
 240 `gnus-subscribe-options-newsgroup-method' is set to
 241 `gnus-subscribe-topics', new groups that matches this regexp will
 242 automatically be subscribed to this topic")
 243     (subscribe-level (integer :tag "Subscribe Level" :value 1) "\
 244 If this topic parameter is set, when new groups are subscribed
 245 automatically under this topic (via the `subscribe' topic parameter)
 246 assign this level to the group, rather than the default level
 247 set in `gnus-level-default-subscribed'"))
 248   "Alist of topic parameters that are not also group parameters.
 249
 250 Each entry has the form (NAME TYPE DOC), where NAME is the parameter
 251 itself (a symbol), TYPE is the parameters type (a sexp widget), and
 252 DOC is a documentation string for the parameter.")
 253
 254 (defconst gnus-extra-group-parameters
 255   '((uidvalidity (string :tag "IMAP uidvalidity") "\
 256 Server-assigned value attached to IMAP groups, used to maintain consistency."))
 257   "Alist of group parameters that are not also topic parameters.
 258
 259 Each entry has the form (NAME TYPE DOC), where NAME is the parameter
 260 itself (a symbol), TYPE is the parameters type (a sexp widget), and
 261 DOC is a documentation string for the parameter.")
 262
 263 (eval-and-compile
 264   (defconst gnus-agent-parameters
 265     '((agent-predicate
 266        (sexp :tag "Selection Predicate" :value false)
 267        "Predicate used to automatically select articles for downloading."
 268        gnus-agent-cat-predicate)
 269       (agent-score
 270        (choice :tag "Score File" :value nil
 271                (const file :tag "Use group's score files")
 272                (repeat (list (string :format "%v" :tag "File name"))))
 273        "Which score files to use when using score to select articles to fetch.
 274
 275     nil
 276          All articles will be scored to zero (0).
 277
 278     `file'
 279          The group's score files will be used to score the articles.
 280
 281     `List'
 282          A list of score file names."
 283        gnus-agent-cat-score-file)
 284       (agent-short-article
 285        (integer :tag "Max Length of Short Article" :value "")
 286        "The SHORT predicate will evaluate to true when the article is
 287 shorter than this length."  gnus-agent-cat-length-when-short)
 288       (agent-long-article
 289        (integer :tag "Min Length of Long Article" :value "")
 290        "The LONG predicate will evaluate to true when the article is
 291 longer than this length."  gnus-agent-cat-length-when-long)
 292       (agent-low-score
 293        (integer :tag "Low Score Limit" :value "")
 294        "The LOW predicate will evaluate to true when the article scores
 295 lower than this limit."  gnus-agent-cat-low-score)
 296       (agent-high-score
 297        (integer :tag "High Score Limit" :value "")
 298        "The HIGH predicate will evaluate to true when the article scores
 299 higher than this limit."  gnus-agent-cat-high-score)
 300       (agent-days-until-old
 301        (integer :tag "Days Until Old" :value "")
 302        "The OLD predicate will evaluate to true when the fetched article
 303 has been stored locally for at least this many days."
 304        gnus-agent-cat-days-until-old)
 305       (agent-enable-expiration
 306        (radio :tag "Expire in this Group or Topic" :value nil
 307               (const :format "Enable " ENABLE)
 308               (const :format "Disable " DISABLE))
 309        "\nEnable, or disable, agent expiration in this group or topic."
 310        gnus-agent-cat-enable-expiration)
 311       (agent-enable-undownloaded-faces
 312        (boolean :tag "Enable Agent Faces")
 313        "Have the summary buffer use the agent's undownloaded faces.
 314 These faces, when enabled, act as a warning that an article has not
 315 been fetched into either the agent nor the cache.  This is of most use
 316 to users who use the agent as a cache (i.e. they only operate on
 317 articles that have been downloaded).  Leave disabled to display normal
 318 article faces even when the article hasn't been downloaded."
 319 gnus-agent-cat-enable-undownloaded-faces))
 320     "Alist of group parameters that are not also topic parameters.
 321
 322 Each entry has the form (NAME TYPE DOC ACCESSOR), where NAME is the
 323 parameter itself (a symbol), TYPE is the parameters type (a sexp
 324 widget), DOC is a documentation string for the parameter, and ACCESSOR
 325 is a function (symbol) that extracts the current value from the
 326 category."))
 327
 328 (defvar gnus-custom-params)
 329 (defvar gnus-custom-method)
 330 (defvar gnus-custom-group)
 331 (defvar gnus-custom-topic)
 332
 333 (defun gnus-group-customize (group &optional topic)
 334   "Edit the group or topic on the current line."
 335   (interactive (list (gnus-group-group-name) (gnus-group-topic-name)))
 336   (let (info
 337         (types (mapcar (lambda (entry)
 338                          `(cons :format "%v%h\n"
 339                                 :doc ,(nth 2 entry)
 340                                 (const :format "" ,(nth 0 entry))
 341                                 ,(nth 1 entry)))
 342                        (append (reverse gnus-group-parameters-more)
 343                                gnus-group-parameters
 344                                (if group
 345                                    gnus-extra-group-parameters
 346                                  gnus-extra-topic-parameters))))
 347         (agent (mapcar (lambda (entry)
 348                          (let ((type (nth 1 entry))
 349                                vcons)
 350                            (if (listp type)
 351                                (setq type (copy-sequence type)))
 352
 353                            (setq vcons (cdr (memq :value type)))
 354
 355                            (if (symbolp (car vcons))
 356                                (condition-case nil
 357                                    (setcar vcons (symbol-value (car vcons)))
 358                                  (error)))
 359                            `(cons :format "%v%h\n"
 360                                   :doc ,(nth 2 entry)
 361                                   (const :format "" ,(nth 0 entry))
 362                                   ,type)))
 363                        (if gnus-agent
 364                            gnus-agent-parameters))))
 365     (unless (or group topic)
 366       (error "No group on current line"))
 367     (when (and group topic)
 368       (error "Both a group and topic on current line"))
 369     (unless (or topic (setq info (gnus-get-info group)))
 370       (error "Killed group; can't be edited"))
 371     ;; Ready.
 372     (gnus-kill-buffer (gnus-get-buffer-create "*Gnus Customize*"))
 373     (switch-to-buffer (gnus-get-buffer-create "*Gnus Customize*"))
 374     (gnus-custom-mode)
 375     (make-local-variable 'gnus-custom-group)
 376     (setq gnus-custom-group group)
 377     (make-local-variable 'gnus-custom-topic)
 378     (setq gnus-custom-topic topic)
 379     (buffer-disable-undo)
 380     (widget-insert "Customize the ")
 381     (if group
 382         (widget-create 'info-link
 383                        :help-echo "Push me to learn more."
 384                        :tag "group parameters"
 385                        "(gnus)Group Parameters")
 386       (widget-create 'info-link
 387                      :help-echo "Push me to learn more."
 388                      :tag  "topic parameters"
 389                      "(gnus)Topic Parameters"))
 390     (widget-insert " for <")
 391     (widget-insert (gnus-group-decoded-name (or group topic)))
 392     (widget-insert "> and press ")
 393     (widget-create 'push-button
 394                    :tag "done"
 395                    :help-echo "Push me when done customizing."
 396                    :action 'gnus-group-customize-done)
 397     (widget-insert ".\n\n")
 398     (make-local-variable 'gnus-custom-params)
 399
 400     (let ((values (if group
 401                       (gnus-info-params info)
 402                     (gnus-topic-parameters topic))))
 403
 404       ;; The parameters in values may contain duplicates.  This is
 405       ;; normally OK as assq returns the first. However, right here
 406       ;; every duplicate ends up being displayed.  So, rather than
 407       ;; display them, remove them from the list.
 408
 409       (let ((tmp (setq values (gnus-copy-sequence values)))
 410             elem)
 411         (while (cdr tmp)
 412           (while (setq elem (assq (caar tmp) (cdr tmp)))
 413             (delq elem tmp))
 414           (setq tmp (cdr tmp))))
 415
 416       ;; Decode values posting-style holds.
 417       (dolist (style (cdr (assq 'posting-style values)))
 418         (when (stringp (cadr style))
 419           (setcdr style (list (decode-coding-string (cadr style) 'utf-8)))))
 420
 421       (setq gnus-custom-params
 422             (apply 'widget-create 'group
 423                    :value values
 424                    (delq nil
 425                          (list `(set :inline t
 426                                      :greedy t
 427                                      :tag "Parameters"
 428                                      :format "%t:\n%h%v"
 429                                      :doc "\
 430 These special parameters are recognized by Gnus.
 431 Check the [ ] for the parameters you want to apply to this group or
 432 to the groups in this topic, then edit the value to suit your taste."
 433                                      ,@types)
 434                                (when gnus-agent
 435                                  `(set :inline t
 436                                        :greedy t
 437                                        :tag "Agent Parameters"
 438                                        :format "%t:\n%h%v"
 439                                        :doc "These agent parameters are
 440 recognized by Gnus.  They control article selection and expiration for
 441 use in the unplugged cache.  Check the [ ] for the parameters you want
 442 to apply to this group or to the groups in this topic, then edit the
 443 value to suit your taste.
 444
 445 For those interested, group parameters override topic parameters while
 446 topic parameters override agent category parameters.  Underlying
 447 category parameters are the customizable variables."  ,@agent))
 448                                '(repeat :inline t
 449                                         :tag "Variables"
 450                                         :format "%t:\n%h%v%i\n\n"
 451                                         :doc "\
 452 Set variables local to the group you are entering.
 453
 454 If you want to turn threading off in `news.answers', you could put
 455 `(gnus-show-threads nil)' in the group parameters of that group.
 456 `gnus-show-threads' will be made into a local variable in the summary
 457 buffer you enter, and the form nil will be `eval'uated there.
 458
 459 This can also be used as a group-specific hook function, if you'd
 460 like.  If you want to hear a beep when you enter a group, you could
 461 put something like `(dummy-variable (ding))' in the parameters of that
 462 group.  `dummy-variable' will be set to the result of the `(ding)'
 463 form, but who cares?"
 464                                         (list :format "%v" :value (nil nil)
 465                                               (symbol :tag "Variable")
 466                                               (sexp :tag
 467                                                     "Value")))
 468
 469                                '(repeat :inline t
 470                                         :tag "Unknown entries"
 471                                         sexp))))))
 472     (when group
 473       (widget-insert "\n\nYou can also edit the ")
 474       (widget-create 'info-link
 475                      :tag "select method"
 476                      :help-echo "Push me to learn more about select methods."
 477                      "(gnus)Select Methods")
 478       (widget-insert " for the group.\n")
 479       (setq gnus-custom-method
 480             (widget-create 'sexp
 481                            :tag "Method"
 482                            :value (gnus-info-method info))))
 483     (use-local-map widget-keymap)
 484     (widget-setup)
 485     (buffer-enable-undo)
 486     (goto-char (point-min))))
 487
 488 (defun gnus-group-customize-done (&rest ignore)
 489   "Apply changes and bury the buffer."
 490   (interactive)
 491   (let ((params (widget-value gnus-custom-params)))
 492     ;; Encode values posting-style holds.
 493     (dolist (style (cdr (assq 'posting-style params)))
 494       (when (stringp (cadr style))
 495         (setcdr style (list (encode-coding-string (cadr style) 'utf-8)))))
 496     (if gnus-custom-topic
 497         (gnus-topic-set-parameters gnus-custom-topic params)
 498       (gnus-group-edit-group-done 'params gnus-custom-group params)
 499       (gnus-group-edit-group-done 'method gnus-custom-group
 500                                   (widget-value gnus-custom-method)))
 501     (bury-buffer)))
 502
 503 ;;; Score Customization:
 504
 505 (defconst gnus-score-parameters
 506   '((mark (number :tag "Mark") "\
 507 The value of this entry should be a number.
 508 Any articles with a score lower than this number will be marked as read.")
 509
 510     (expunge (number :tag "Expunge") "\
 511 The value of this entry should be a number.
 512 Any articles with a score lower than this number will be removed from
 513 the summary buffer.")
 514
 515     (mark-and-expunge (number :tag "Mark-and-expunge") "\
 516 The value of this entry should be a number.
 517 Any articles with a score lower than this number will be marked as
 518 read and removed from the summary buffer.")
 519
 520     (thread-mark-and-expunge (number :tag "Thread-mark-and-expunge") "\
 521 The value of this entry should be a number.
 522 All articles that belong to a thread that has a total score below this
 523 number will be marked as read and removed from the summary buffer.
 524 `gnus-thread-score-function' says how to compute the total score
 525 for a thread.")
 526
 527     (files (repeat :inline t :tag "Files" file) "\
 528 The value of this entry should be any number of file names.
 529 These files are assumed to be score files as well, and will be loaded
 530 the same way this one was.")
 531
 532     (exclude-files (repeat :inline t :tag "Exclude-files" file) "\
 533 The clue of this entry should be any number of files.
 534 These files will not be loaded, even though they would normally be so,
 535 for some reason or other.")
 536
 537     (eval (sexp :tag "Eval" :value nil) "\
 538 The value of this entry will be `eval'uated.
 539 This element will be ignored when handling global score files.")
 540
 541     (read-only (boolean :tag "Read-only" :value t) "\
 542 Read-only score files will not be updated or saved.
 543 Global score files should feature this atom.")
 544
 545     (orphan (number :tag "Orphan") "\
 546 The value of this entry should be a number.
 547 Articles that do not have parents will get this number added to their
 548 scores.  Imagine you follow some high-volume newsgroup, like
 549 `comp.lang.c'.  Most likely you will only follow a few of the threads,
 550 also want to see any new threads.
 551
 552 You can do this with the following two score file entries:
 553
 554      (orphan -500)
 555      (mark-and-expunge -100)
 556
 557 When you enter the group the first time, you will only see the new
 558 threads.  You then raise the score of the threads that you find
 559 interesting (with `I T' or `I S'), and ignore (`C y') the rest.
 560 Next time you enter the group, you will see new articles in the
 561 interesting threads, plus any new threads.
 562
 563 I.e.---the orphan score atom is for high-volume groups where there
 564 exist a few interesting threads which can't be found automatically
 565 by ordinary scoring rules.")
 566
 567     (adapt (choice :tag "Adapt"
 568                    (const t)
 569                    (const ignore)
 570                    (sexp :format "%v"
 571                          :hide-front-space t)) "\
 572 This entry controls the adaptive scoring.
 573 If it is t, the default adaptive scoring rules will be used.  If it
 574 is `ignore', no adaptive scoring will be performed on this group.  If
 575 it is a list, this list will be used as the adaptive scoring rules.
 576 If it isn't present, or is something other than t or `ignore', the
 577 default adaptive scoring rules will be used.  If you want to use
 578 adaptive scoring on most groups, you'd set `gnus-use-adaptive-scoring'
 579 to t, and insert an `(adapt ignore)' in the groups where you do not
 580 want adaptive scoring.  If you only want adaptive scoring in a few
 581 groups, you'd set `gnus-use-adaptive-scoring' to nil, and insert
 582 `(adapt t)' in the score files of the groups where you want it.")
 583
 584     (adapt-file (file :tag "Adapt-file") "\
 585 All adaptive score entries will go to the file named by this entry.
 586 It will also be applied when entering the group.  This atom might
 587 be handy if you want to adapt on several groups at once, using the
 588 same adaptive file for a number of groups.")
 589
 590     (local (repeat :tag "Local"
 591                    (group :value (nil nil)
 592                           (symbol :tag "Variable")
 593                           (sexp :tag "Value"))) "\
 594 The value of this entry should be a list of `(VAR VALUE)' pairs.
 595 Each VAR will be made buffer-local to the current summary buffer,
 596 and set to the value specified.  This is a convenient, if somewhat
 597 strange, way of setting variables in some groups if you don't like
 598 hooks much.")
 599     (touched (sexp :format "Touched\n") "Internal variable."))
 600   "Alist of valid symbolic score parameters.
 601
 602 Each entry has the form (NAME TYPE DOC), where NAME is the parameter
 603 itself (a symbol), TYPE is the parameters type (a sexp widget), and DOC is a
 604 documentation string for the parameter.")
 605
 606 (define-widget 'gnus-score-string 'group
 607   "Edit score entries for string-valued headers."
 608   :convert-widget 'gnus-score-string-convert)
 609
 610 (defun gnus-score-string-convert (widget)
 611   ;; Set args appropriately.
 612   (let* ((tag (widget-get widget :tag))
 613          (item `(const :format "" :value ,(downcase tag)))
 614          (match '(string :tag "Match"))
 615          (score '(choice :tag "Score"
 616                          (const :tag "default" nil)
 617                          (integer :format "%v"
 618                                   :hide-front-space t)))
 619          (expire '(choice :tag "Expire"
 620                           (const :tag "off" nil)
 621                           (integer :format "%v"
 622                                    :hide-front-space t)))
 623          (type '(choice :tag "Type"
 624                         :value s
 625                         ;; I should really create a forgiving :match
 626                         ;; function for each type below, that only
 627                         ;; looked at the first letter.
 628                         (const :tag "Regexp" r)
 629                         (const :tag "Regexp (fixed case)" R)
 630                         (const :tag "Substring" s)
 631                         (const :tag "Substring (fixed case)" S)
 632                         (const :tag "Exact" e)
 633                         (const :tag "Exact (fixed case)" E)
 634                         (const :tag "Word" w)
 635                         (const :tag "Word (fixed case)" W)
 636                         (const :tag "default" nil)))
 637          (group `(group ,match ,score ,expire ,type))
 638          (doc (concat (or (widget-get widget :doc)
 639                           (concat "Change score based on the " tag
 640                                   " header.\n"))
 641                       "
 642 You can have an arbitrary number of score entries for this header,
 643 each score entry has four elements:
 644
 645 1. The \"match element\".  This should be the string to look for in the
 646    header.
 647
 648 2. The \"score element\".  This number should be an integer in the
 649    neginf to posinf interval.  This number is added to the score
 650    of the article if the match is successful.  If this element is
 651    not present, the `gnus-score-interactive-default-score' number
 652    will be used instead.  This is 1000 by default.
 653
 654 3. The \"date element\".  This date says when the last time this score
 655    entry matched, which provides a mechanism for expiring the
 656    score entries.  It this element is not present, the score
 657    entry is permanent.  The date is represented by the number of
 658    days since December 31, 1 ce.
 659
 660 4. The \"type element\".  This element specifies what function should
 661    be used to see whether this score entry matches the article.
 662
 663    There are the regexp, as well as substring types, and exact match,
 664    and word match types.  If this element is not present, Gnus will
 665    assume that substring matching should be used.  There is case
 666    sensitive variants of all match types.")))
 667     (widget-put widget :args `(,item
 668                                (repeat :inline t
 669                                        :indent 0
 670                                        :tag ,tag
 671                                        :doc ,doc
 672                                        :format "%t:\n%h%v%i\n\n"
 673                                        (choice :format "%v"
 674                                                :value ("" nil nil s)
 675                                                ,group
 676                                                sexp)))))
 677   widget)
 678
 679 (define-widget 'gnus-score-integer 'group
 680   "Edit score entries for integer-valued headers."
 681   :convert-widget 'gnus-score-integer-convert)
 682
 683 (defun gnus-score-integer-convert (widget)
 684   ;; Set args appropriately.
 685   (let* ((tag (widget-get widget :tag))
 686          (item `(const :format "" :value ,(downcase tag)))
 687          (match '(integer :tag "Match"))
 688          (score '(choice :tag "Score"
 689                          (const :tag "default" nil)
 690                          (integer :format "%v"
 691                                   :hide-front-space t)))
 692          (expire '(choice :tag "Expire"
 693                           (const :tag "off" nil)
 694                           (integer :format "%v"
 695                                    :hide-front-space t)))
 696          (type '(choice :tag "Type"
 697                         :value <
 698                         (const <)
 699                         (const >)
 700                         (const =)
 701                         (const >=)
 702                         (const <=)))
 703          (group `(group ,match ,score ,expire ,type))
 704          (doc (concat (or (widget-get widget :doc)
 705                           (concat "Change score based on the " tag
 706                                   " header.")))))
 707     (widget-put widget :args `(,item
 708                                (repeat :inline t
 709                                        :indent 0
 710                                        :tag ,tag
 711                                        :doc ,doc
 712                                        :format "%t:\n%h%v%i\n\n"
 713                                        ,group))))
 714   widget)
 715
 716 (define-widget 'gnus-score-date 'group
 717   "Edit score entries for date-valued headers."
 718   :convert-widget 'gnus-score-date-convert)
 719
 720 (defun gnus-score-date-convert (widget)
 721   ;; Set args appropriately.
 722   (let* ((tag (widget-get widget :tag))
 723          (item `(const :format "" :value ,(downcase tag)))
 724          (match '(string :tag "Match"))
 725          (score '(choice :tag "Score"
 726                          (const :tag "default" nil)
 727                          (integer :format "%v"
 728                                   :hide-front-space t)))
 729          (expire '(choice :tag "Expire"
 730                           (const :tag "off" nil)
 731                           (integer :format "%v"
 732                                    :hide-front-space t)))
 733          (type '(choice :tag "Type"
 734                         :value regexp
 735                         (const regexp)
 736                         (const before)
 737                         (const at)
 738                         (const after)))
 739          (group `(group ,match ,score ,expire ,type))
 740          (doc (concat (or (widget-get widget :doc)
 741                           (concat "Change score based on the " tag
 742                                   " header."))
 743                       "
 744 For the Date header we have three kinda silly match types: `before',
 745 `at' and `after'.  I can't really imagine this ever being useful, but,
 746 like, it would feel kinda silly not to provide this function.  Just in
 747 case.  You never know.  Better safe than sorry.  Once burnt, twice
 748 shy.  Don't judge a book by its cover.  Never not have sex on a first
 749 date.  (I have been told that at least one person, and I quote,
 750 \"found this function indispensable\", however.)
 751
 752 A more useful match type is `regexp'.  With it, you can match the date
 753 string using a regular expression.  The date is normalized to ISO8601
 754 compact format first---`YYYYMMDDTHHMMSS'.  If you want to match all
 755 articles that have been posted on April 1st in every year, you could
 756 use `....0401.........' as a match string, for instance.  (Note that
 757 the date is kept in its original time zone, so this will match
 758 articles that were posted when it was April 1st where the article was
 759 posted from.  Time zones are such wholesome fun for the whole family,
 760 eh?")))
 761     (widget-put widget :args `(,item
 762                                (repeat :inline t
 763                                        :indent 0
 764                                        :tag ,tag
 765                                        :doc ,doc
 766                                        :format "%t:\n%h%v%i\n\n"
 767                                        ,group))))
 768   widget)
 769
 770 (define-widget 'gnus-score-extra 'group
 771   "Edit score entries for extra headers."
 772   :convert-widget 'gnus-score-extra-convert)
 773
 774 (defun gnus-score-extra-convert (widget)
 775   ;; Set args appropriately.
 776   (let* ((tag (widget-get widget :tag))
 777          (item `(const :format "" :value ,(downcase tag)))
 778          (match '(string :tag "Match"))
 779          (score '(choice :tag "Score"
 780                          (const :tag "default" nil)
 781                          (integer :format "%v"
 782                                   :hide-front-space t)))
 783          (expire '(choice :tag "Expire"
 784                           (const :tag "off" nil)
 785                           (integer :format "%v"
 786                                    :hide-front-space t)))
 787          (type '(choice :tag "Type"
 788                         :value s
 789                         ;; I should really create a forgiving :match
 790                         ;; function for each type below, that only
 791                         ;; looked at the first letter.
 792                         (const :tag "Regexp" r)
 793                         (const :tag "Regexp (fixed case)" R)
 794                         (const :tag "Substring" s)
 795                         (const :tag "Substring (fixed case)" S)
 796                         (const :tag "Exact" e)
 797                         (const :tag "Exact (fixed case)" E)
 798                         (const :tag "Word" w)
 799                         (const :tag "Word (fixed case)" W)
 800                         (const :tag "default" nil)))
 801          (header (if gnus-extra-headers
 802                      (let (name)
 803                        `(choice :tag "Header"
 804                                 ,@(mapcar (lambda (h)
 805                                             (setq name (symbol-name h))
 806                                             (list 'const :tag name name))
 807                                           gnus-extra-headers)
 808                                 (string :tag "Other" :format "%v")))
 809                    '(string :tag "Header")))
 810          (group `(group ,match ,score ,expire ,type ,header))
 811          (doc (concat (or (widget-get widget :doc)
 812                           (concat "Change score based on the " tag
 813                                   " header.\n")))))
 814     (widget-put
 815      widget :args
 816      `(,item
 817        (repeat :inline t
 818                :indent 0
 819                :tag ,tag
 820                :doc ,doc
 821                :format "%t:\n%h%v%i\n\n"
 822                (choice :format "%v"
 823                        :value ("" nil nil s
 824                                ,(if gnus-extra-headers
 825                                     (symbol-name (car gnus-extra-headers))
 826                                   ""))
 827                        ,group
 828                        sexp)))))
 829   widget)
 830
 831 (defvar gnus-custom-scores)
 832 (defvar gnus-custom-score-alist)
 833
 834 (defun gnus-score-customize (file)
 835   "Customize score file FILE.
 836 When called interactively, FILE defaults to the current score file.
 837 This can be changed using the `\\[gnus-score-change-score-file]' command."
 838   (interactive (list gnus-current-score-file))
 839   (unless file
 840     (error "No score file for %s"
 841            (gnus-group-decoded-name gnus-newsgroup-name)))
 842   (let ((scores (gnus-score-load file))
 843         (types (mapcar (lambda (entry)
 844                          `(group :format "%v%h\n"
 845                                  :doc ,(nth 2 entry)
 846                                  (const :format "" ,(nth 0 entry))
 847                                  ,(nth 1 entry)))
 848                        gnus-score-parameters)))
 849     ;; Ready.
 850     (kill-buffer (gnus-get-buffer-create "*Gnus Customize*"))
 851     (switch-to-buffer (gnus-get-buffer-create "*Gnus Customize*"))
 852     (gnus-custom-mode)
 853     (make-local-variable 'gnus-custom-score-alist)
 854     (setq gnus-custom-score-alist scores)
 855     (widget-insert "Customize the ")
 856     (widget-create 'info-link
 857                    :help-echo "Push me to learn more."
 858                    :tag "score entries"
 859                    "(gnus)Score File Format")
 860     (widget-insert " for\n\t")
 861     (widget-insert file)
 862     (widget-insert "\nand press ")
 863     (widget-create 'push-button
 864                    :tag "done"
 865                    :help-echo "Push me when done customizing."
 866                    :action 'gnus-score-customize-done)
 867     (widget-insert ".\n
 868 Check the [ ] for the entries you want to apply to this score file, then
 869 edit the value to suit your taste.  Don't forget to mark the checkbox,
 870 if you do all your changes will be lost.  ")
 871     (widget-insert "\n\n")
 872     (make-local-variable 'gnus-custom-scores)
 873     (setq gnus-custom-scores
 874           (widget-create 'group
 875                          :value scores
 876                          `(checklist :inline t
 877                                      :greedy t
 878                                      (gnus-score-string :tag "From")
 879                                      (gnus-score-string :tag "Subject")
 880                                      (gnus-score-string :tag "References")
 881                                      (gnus-score-string :tag "Xref")
 882                                      (gnus-score-extra :tag "Extra")
 883                                      (gnus-score-string :tag "Message-ID")
 884                                      (gnus-score-integer :tag "Lines")
 885                                      (gnus-score-integer :tag "Chars")
 886                                      (gnus-score-date :tag "Date")
 887                                      (gnus-score-string :tag "Head"
 888                                                         :doc "\
 889 Match all headers in the article.
 890
 891 Using one of `Head', `Body', `All' will slow down scoring considerable.
 892 ")
 893                                      (gnus-score-string :tag "Body"
 894                                                         :doc "\
 895 Match the body sans header of the article.
 896
 897 Using one of `Head', `Body', `All' will slow down scoring considerable.
 898 ")
 899                                      (gnus-score-string :tag "All"
 900                                                         :doc "\
 901 Match the entire article, including both headers and body.
 902
 903 Using one of `Head', `Body', `All' will slow down scoring
 904 considerable.
 905 ")
 906                                      (gnus-score-string :tag
 907                                                         "Followup"
 908                                                         :doc "\
 909 Score all followups to the specified authors.
 910
 911 This entry is somewhat special, in that it will match the `From:'
 912 header, and affect the score of not only the matching articles, but
 913 also all followups to the matching articles.  This allows you
 914 e.g. increase the score of followups to your own articles, or decrease
 915 the score of followups to the articles of some known trouble-maker.
 916 ")
 917                                      (gnus-score-string :tag "Thread"
 918                                                         :doc "\
 919 Add a score entry on all articles that are part of a thread.
 920
 921 This match key works along the same lines as the `Followup' match key.
 922 If you say that you want to score on a (sub-)thread that is started by
 923 an article with a `Message-ID' X, then you add a `thread' match.  This
 924 will add a new `thread' match for each article that has X in its
 925 `References' header.  (These new `thread' matches will use the
 926 `Message-ID's of these matching articles.)  This will ensure that you
 927 can raise/lower the score of an entire thread, even though some
 928 articles in the thread may not have complete `References' headers.
 929 Note that using this may lead to nondeterministic scores of the
 930 articles in the thread.
 931 ")
 932                                      ,@types)
 933                          '(repeat :inline t
 934                                   :tag "Unknown entries"
 935                                   sexp)))
 936     (use-local-map widget-keymap)
 937     (widget-setup)))
 938
 939 (defun gnus-score-customize-done (&rest ignore)
 940   "Reset the score alist with the present value."
 941   (let ((alist gnus-custom-score-alist)
 942         (value (widget-value gnus-custom-scores)))
 943     (setcar alist (car value))
 944     (setcdr alist (cdr value))
 945     (gnus-score-set 'touched '(t) alist))
 946   (bury-buffer))
 947
 948 (defvar category-fields nil)
 949 (defvar gnus-agent-cat-name)
 950 (defvar gnus-agent-cat-score-file)
 951 (defvar gnus-agent-cat-length-when-short)
 952 (defvar gnus-agent-cat-length-when-long)
 953 (defvar gnus-agent-cat-low-score)
 954 (defvar gnus-agent-cat-high-score)
 955 (defvar gnus-agent-cat-enable-expiration)
 956 (defvar gnus-agent-cat-days-until-old)
 957 (defvar gnus-agent-cat-predicate)
 958 (defvar gnus-agent-cat-groups)
 959 (defvar gnus-agent-cat-enable-undownloaded-faces)
 960
 961 (defun gnus-trim-whitespace (s)
 962   (when (string-match "\\`[ \n\t]+" s)
 963     (setq s (substring s (match-end 0))))
 964   (when (string-match "[ \n\t]+\\'" s)
 965     (setq s (substring s 0 (match-beginning 0))))
 966   s)
 967
 968 (defmacro gnus-agent-cat-prepare-category-field (parameter)
 969   (let* ((entry (assq parameter gnus-agent-parameters))
 970          (field (nth 3 entry)))
 971     `(let* ((type (copy-sequence
 972                    (nth 1 (assq ',parameter gnus-agent-parameters))))
 973             (val (,field info))
 974             (deflt (if (,field defaults)
 975                        (concat " [" (gnus-trim-whitespace
 976                                      (gnus-pp-to-string (,field defaults)))
 977                                "]")))
 978             symb)
 979
 980        (if (eq (car type) 'radio)
 981            (let* ((rtype (nreverse type))
 982                   (rt rtype))
 983              (while (listp (or (cadr rt) 'not-list))
 984                (setq rt (cdr rt)))
 985
 986              (setcdr rt (cons '(const :format "Inherit " nil) (cdr rt)))
 987              (setq type (nreverse rtype))))
 988
 989        (if deflt
 990            (let ((tag (cdr (memq :tag type))))
 991              (when (string-match "\n" deflt)
 992                (while (progn (setq deflt (replace-match "\n " t t
 993                                                         deflt))
 994                              (string-match "\n" deflt (match-end 0))))
 995                (setq deflt (concat "\n" deflt)))
 996
 997              (setcar tag (concat (car tag) deflt))))
 998
 999        (widget-insert "\n")
1000
1001        (setq val (if val
1002                      (widget-create type :value val)
1003                    (widget-create type))
1004              symb (set (make-local-variable ',field) val))
1005
1006        (widget-put symb :default val)
1007        (widget-put symb :accessor ',field)
1008        (push symb category-fields))))
1009
1010 (defun gnus-agent-customize-category (category)
1011   "Edit the CATEGORY."
1012   (interactive (list (gnus-category-name)))
1013   (let ((info (assq category gnus-category-alist))
1014         (defaults (list nil '(agent-predicate . false)
1015                         (cons 'agent-enable-expiration
1016                               gnus-agent-enable-expiration)
1017                         '(agent-days-until-old . 7)
1018                         (cons 'agent-length-when-short
1019                               gnus-agent-short-article)
1020                         (cons 'agent-length-when-long gnus-agent-long-article)
1021                         (cons 'agent-low-score gnus-agent-low-score)
1022                         (cons 'agent-high-score gnus-agent-high-score))))
1023
1024     (let ((old (get-buffer "*Gnus Agent Category Customize*")))
1025       (when old
1026         (gnus-kill-buffer old)))
1027     (switch-to-buffer (gnus-get-buffer-create
1028                        "*Gnus Agent Category Customize*"))
1029
1030     (let ((inhibit-read-only t))
1031       (gnus-custom-mode)
1032       (buffer-disable-undo)
1033
1034       (let* ((name (gnus-agent-cat-name info)))
1035         (widget-insert "Customize the Agent Category '")
1036         (widget-insert (symbol-name name))
1037         (widget-insert "' and press ")
1038         (widget-create
1039          'push-button
1040          :notify
1041          (lambda (&rest ignore)
1042            (let* ((info (assq gnus-agent-cat-name gnus-category-alist))
1043                   (widgets category-fields))
1044              (while widgets
1045                (let* ((widget (pop widgets))
1046                       (value (condition-case nil (widget-value widget) (error))))
1047                  (eval `(setf (,(widget-get widget :accessor) ',info)
1048                               ',value)))))
1049            (gnus-category-write)
1050            (gnus-kill-buffer (current-buffer))
1051            (when (get-buffer gnus-category-buffer)
1052              (switch-to-buffer (get-buffer gnus-category-buffer))
1053              (gnus-category-list)))
1054                        "Done")
1055         (widget-insert
1056          "\n    Note: Empty fields default to the customizable global\
1057  variables.\n\n")
1058
1059         (set (make-local-variable 'gnus-agent-cat-name)
1060              name))
1061
1062       (set (make-local-variable 'category-fields) nil)
1063       (gnus-agent-cat-prepare-category-field agent-predicate)
1064
1065       (gnus-agent-cat-prepare-category-field agent-score)
1066       (gnus-agent-cat-prepare-category-field agent-short-article)
1067       (gnus-agent-cat-prepare-category-field agent-long-article)
1068       (gnus-agent-cat-prepare-category-field agent-low-score)
1069       (gnus-agent-cat-prepare-category-field agent-high-score)
1070
1071       ;; The group list is NOT handled with
1072       ;; gnus-agent-cat-prepare-category-field as I don't want the
1073       ;; group list to appear when customizing a topic.
1074       (widget-insert "\n")
1075
1076       (let ((symb
1077              (set
1078               (make-local-variable 'gnus-agent-cat-groups)
1079               (widget-create
1080                `(choice
1081                  :format "%[Select Member Groups%]\n%v" :value ignore
1082                  (const :menu-tag "do not change" :tag "" :value ignore)
1083                  (checklist :entry-format "%b %v"
1084                             :menu-tag "display group selectors"
1085                             :greedy t
1086                             :value
1087                             ,(delq nil
1088                                    (mapcar
1089                                     (lambda (newsrc)
1090                                       (car (member
1091                                             (gnus-info-group newsrc)
1092                                             (gnus-agent-cat-groups info))))
1093                                     (cdr gnus-newsrc-alist)))
1094                             ,@(mapcar (lambda (newsrc)
1095                                         `(const ,(gnus-info-group newsrc)))
1096                                       (cdr gnus-newsrc-alist))))))))
1097
1098       (widget-put symb :default (gnus-agent-cat-groups info))
1099       (widget-put symb :accessor 'gnus-agent-cat-groups)
1100       (push symb category-fields))
1101
1102       (widget-insert "\nExpiration Settings ")
1103
1104       (gnus-agent-cat-prepare-category-field agent-enable-expiration)
1105       (gnus-agent-cat-prepare-category-field agent-days-until-old)
1106
1107       (widget-insert "\nVisual Settings ")
1108
1109       (gnus-agent-cat-prepare-category-field agent-enable-undownloaded-faces)
1110
1111       (use-local-map widget-keymap)
1112       (widget-setup)
1113       (buffer-enable-undo))))
1114
1115 ;;; The End:
1116
1117 (provide 'gnus-cus)
1118
1119 ;;; gnus-cus.el ends here