lisp/gnus/gnus-salt.el

   1 ;;; gnus-salt.el --- alternate summary mode interfaces for Gnus
   2
   3 ;; Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005,
   4 ;;   2006, 2007, 2008, 2009, 2010  Free Software Foundation, Inc.
   5
   6 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   7 ;; Keywords: news
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;;; Code:
  27
  28 (eval-when-compile (require 'cl))
  29
  30 (require 'gnus)
  31 (require 'gnus-sum)
  32 (require 'gnus-win)
  33
  34 ;;;
  35 ;;; gnus-pick-mode
  36 ;;;
  37
  38 (defvar gnus-pick-mode nil
  39   "Minor mode for providing a pick-and-read interface in Gnus
  40 summary buffers.")
  41
  42 (defcustom gnus-pick-display-summary nil
  43   "*Display summary while reading."
  44   :type 'boolean
  45   :group 'gnus-summary-pick)
  46
  47 (defcustom gnus-pick-mode-hook nil
  48   "Hook run in summary pick mode buffers."
  49   :type 'hook
  50   :group 'gnus-summary-pick)
  51
  52 (when (featurep 'xemacs)
  53   (add-hook 'gnus-pick-mode-hook 'gnus-xmas-pick-menu-add))
  54
  55 (defcustom gnus-mark-unpicked-articles-as-read nil
  56   "*If non-nil, mark all unpicked articles as read."
  57   :type 'boolean
  58   :group 'gnus-summary-pick)
  59
  60 (defcustom gnus-pick-elegant-flow t
  61   "If non-nil, `gnus-pick-start-reading' runs
  62  `gnus-summary-next-group' when no articles have been picked."
  63   :type 'boolean
  64   :group 'gnus-summary-pick)
  65
  66 (defcustom gnus-summary-pick-line-format
  67   "%-5P %U\%R\%z\%I\%(%[%4L: %-23,23n%]%) %s\n"
  68   "*The format specification of the lines in pick buffers.
  69 It accepts the same format specs that `gnus-summary-line-format' does."
  70   :type 'string
  71   :group 'gnus-summary-pick)
  72
  73 ;;; Internal variables.
  74
  75 (defvar gnus-pick-mode-map nil)
  76
  77 (unless gnus-pick-mode-map
  78   (setq gnus-pick-mode-map (make-sparse-keymap))
  79
  80   (gnus-define-keys gnus-pick-mode-map
  81     " " gnus-pick-next-page
  82     "u" gnus-pick-unmark-article-or-thread
  83     "." gnus-pick-article-or-thread
  84     gnus-down-mouse-2 gnus-pick-mouse-pick-region
  85     "\r" gnus-pick-start-reading))
  86
  87 (defun gnus-pick-make-menu-bar ()
  88   (unless (boundp 'gnus-pick-menu)
  89     (easy-menu-define
  90       gnus-pick-menu gnus-pick-mode-map ""
  91       '("Pick"
  92         ("Pick"
  93          ["Article" gnus-summary-mark-as-processable t]
  94          ["Thread" gnus-uu-mark-thread t]
  95          ["Region" gnus-uu-mark-region t]
  96          ["Regexp" gnus-uu-mark-by-regexp t]
  97          ["Buffer" gnus-uu-mark-buffer t])
  98         ("Unpick"
  99          ["Article" gnus-summary-unmark-as-processable t]
 100          ["Thread" gnus-uu-unmark-thread t]
 101          ["Region" gnus-uu-unmark-region t]
 102          ["Regexp" gnus-uu-unmark-by-regexp t]
 103          ["Buffer" gnus-summary-unmark-all-processable t])
 104         ["Start reading" gnus-pick-start-reading t]
 105         ["Switch pick mode off" gnus-pick-mode gnus-pick-mode]))))
 106
 107 (defun gnus-pick-mode (&optional arg)
 108   "Minor mode for providing a pick-and-read interface in Gnus summary buffers.
 109
 110 \\{gnus-pick-mode-map}"
 111   (interactive "P")
 112   (when (eq major-mode 'gnus-summary-mode)
 113     (if (not (set (make-local-variable 'gnus-pick-mode)
 114                   (if (null arg) (not gnus-pick-mode)
 115                     (> (prefix-numeric-value arg) 0))))
 116         (remove-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
 117       ;; Make sure that we don't select any articles upon group entry.
 118       (set (make-local-variable 'gnus-auto-select-first) nil)
 119       ;; Change line format.
 120       (setq gnus-summary-line-format gnus-summary-pick-line-format)
 121       (setq gnus-summary-line-format-spec nil)
 122       (gnus-update-format-specifications nil 'summary)
 123       (gnus-update-summary-mark-positions)
 124       (add-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
 125       (set (make-local-variable 'gnus-summary-goto-unread) 'never)
 126       ;; Set up the menu.
 127       (when (gnus-visual-p 'pick-menu 'menu)
 128         (gnus-pick-make-menu-bar))
 129       (add-minor-mode 'gnus-pick-mode " Pick" gnus-pick-mode-map)
 130       (gnus-run-hooks 'gnus-pick-mode-hook))))
 131
 132 (defun gnus-pick-setup-message ()
 133   "Make Message do the right thing on exit."
 134   (when (and (gnus-buffer-live-p gnus-summary-buffer)
 135              (with-current-buffer gnus-summary-buffer
 136                gnus-pick-mode))
 137     (message-add-action
 138      `(gnus-configure-windows ,gnus-current-window-configuration t)
 139      'send 'exit 'postpone 'kill)))
 140
 141 (defvar gnus-pick-line-number 1)
 142 (defun gnus-pick-line-number ()
 143   "Return the current line number."
 144   (if (bobp)
 145       (setq gnus-pick-line-number 1)
 146     (incf gnus-pick-line-number)))
 147
 148 (defun gnus-pick-start-reading (&optional catch-up)
 149   "Start reading the picked articles.
 150 If given a prefix, mark all unpicked articles as read."
 151   (interactive "P")
 152   (if gnus-newsgroup-processable
 153       (progn
 154         (gnus-summary-limit-to-articles nil)
 155         (when (or catch-up gnus-mark-unpicked-articles-as-read)
 156           (gnus-summary-limit-mark-excluded-as-read))
 157         (gnus-summary-first-article)
 158         (gnus-configure-windows
 159          (if gnus-pick-display-summary 'article 'pick) t))
 160     (if gnus-pick-elegant-flow
 161         (progn
 162           (when (or catch-up gnus-mark-unpicked-articles-as-read)
 163             (gnus-summary-catchup nil t))
 164           (if (gnus-group-quit-config gnus-newsgroup-name)
 165               (gnus-summary-exit)
 166             (gnus-summary-next-group)))
 167       (error "No articles have been picked"))))
 168
 169 (defun gnus-pick-goto-article (arg)
 170   "Go to the article number indicated by ARG.
 171 If ARG is an invalid article number, then stay on current line."
 172   (let (pos)
 173     (save-excursion
 174       (goto-char (point-min))
 175       (when (zerop (forward-line (1- (prefix-numeric-value arg))))
 176         (setq pos (point))))
 177     (if (not pos)
 178         (gnus-error 2 "No such line: %s" arg)
 179       (goto-char pos))))
 180
 181 (defun gnus-pick-article (&optional arg)
 182   "Pick the article on the current line.
 183 If ARG, pick the article on that line instead."
 184   (interactive "P")
 185   (when arg
 186     (gnus-pick-goto-article arg))
 187   (gnus-summary-mark-as-processable 1))
 188
 189 (defun gnus-pick-article-or-thread (&optional arg)
 190   "If `gnus-thread-hide-subtree' is t, then pick the thread on the current line.
 191 Otherwise pick the article on the current line.
 192 If ARG, pick the article/thread on that line instead."
 193   (interactive "P")
 194   (when arg
 195     (gnus-pick-goto-article arg))
 196   (if gnus-thread-hide-subtree
 197       (progn
 198         (save-excursion
 199           (gnus-uu-mark-thread))
 200         (forward-line 1))
 201     (gnus-summary-mark-as-processable 1)))
 202
 203 (defun gnus-pick-unmark-article-or-thread (&optional arg)
 204   "If `gnus-thread-hide-subtree' is t, then unmark the thread on current line.
 205 Otherwise unmark the article on current line.
 206 If ARG, unmark thread/article on that line instead."
 207   (interactive "P")
 208   (when arg
 209     (gnus-pick-goto-article arg))
 210   (if gnus-thread-hide-subtree
 211       (save-excursion
 212         (gnus-uu-unmark-thread))
 213     (gnus-summary-unmark-as-processable 1)))
 214
 215 (defun gnus-pick-mouse-pick (e)
 216   (interactive "e")
 217   (mouse-set-point e)
 218   (save-excursion
 219     (gnus-summary-mark-as-processable 1)))
 220
 221 (defun gnus-pick-mouse-pick-region (start-event)
 222   "Pick articles that the mouse is dragged over.
 223 This must be bound to a button-down mouse event."
 224   (interactive "e")
 225   (mouse-minibuffer-check start-event)
 226   (let* ((echo-keystrokes 0)
 227          (start-posn (event-start start-event))
 228          (start-point (posn-point start-posn))
 229          (start-line (1+ (count-lines (point-min) start-point)))
 230          (start-window (posn-window start-posn))
 231          (bounds (gnus-window-edges start-window))
 232          (top (nth 1 bounds))
 233          (bottom (if (window-minibuffer-p start-window)
 234                      (nth 3 bounds)
 235                    ;; Don't count the mode line.
 236                    (1- (nth 3 bounds))))
 237          (click-count (1- (event-click-count start-event))))
 238     (setq mouse-selection-click-count click-count)
 239     (setq mouse-selection-click-count-buffer (current-buffer))
 240     (mouse-set-point start-event)
 241    ;; In case the down click is in the middle of some intangible text,
 242     ;; use the end of that text, and put it in START-POINT.
 243     (when (< (point) start-point)
 244       (goto-char start-point))
 245     (gnus-pick-article)
 246     (setq start-point (point))
 247     ;; end-of-range is used only in the single-click case.
 248     ;; It is the place where the drag has reached so far
 249     ;; (but not outside the window where the drag started).
 250     (let (event end end-point (end-of-range (point)))
 251       (track-mouse
 252         (while (progn
 253                  (setq event (cdr (gnus-read-event-char)))
 254                  (or (mouse-movement-p event)
 255                      (eq (car-safe event) 'switch-frame)))
 256           (if (eq (car-safe event) 'switch-frame)
 257               nil
 258             (setq end (event-end event)
 259                   end-point (posn-point end))
 260
 261             (cond
 262              ;; Are we moving within the original window?
 263              ((and (eq (posn-window end) start-window)
 264                    (integer-or-marker-p end-point))
 265               ;; Go to START-POINT first, so that when we move to END-POINT,
 266               ;; if it's in the middle of intangible text,
 267               ;; point jumps in the direction away from START-POINT.
 268               (goto-char start-point)
 269               (goto-char end-point)
 270               (gnus-pick-article)
 271               ;; In case the user moved his mouse really fast, pick
 272               ;; articles on the line between this one and the last one.
 273               (let* ((this-line (1+ (count-lines (point-min) end-point)))
 274                      (min-line (min this-line start-line))
 275                      (max-line (max this-line start-line)))
 276                 (while (< min-line max-line)
 277                   (goto-char (point-min))
 278                   (forward-line (1- min-line))
 279                   (gnus-pick-article)
 280                   (setq min-line (1+ min-line)))
 281                 (setq start-line this-line))
 282               (when (zerop (% click-count 3))
 283                 (setq end-of-range (point))))
 284              (t
 285               (let ((mouse-row (cdr (cdr (mouse-position)))))
 286                 (cond
 287                  ((null mouse-row))
 288                  ((< mouse-row top)
 289                   (mouse-scroll-subr start-window (- mouse-row top)))
 290                  ((>= mouse-row bottom)
 291                   (mouse-scroll-subr start-window
 292                                      (1+ (- mouse-row bottom)))))))))))
 293       (when (consp event)
 294         (let ((fun (key-binding (vector (car event)))))
 295           ;; Run the binding of the terminating up-event, if possible.
 296        ;; In the case of a multiple click, it gives the wrong results,
 297           ;; because it would fail to set up a region.
 298           (when nil
 299       ;; (and (= (mod mouse-selection-click-count 3) 0) (fboundp fun))
 300        ;; In this case, we can just let the up-event execute normally.
 301             (let ((end (event-end event)))
 302               ;; Set the position in the event before we replay it,
 303               ;; because otherwise it may have a position in the wrong
 304               ;; buffer.
 305               (setcar (cdr end) end-of-range)
 306               ;; Delete the overlay before calling the function,
 307              ;; because delete-overlay increases buffer-modified-tick.
 308               (push event unread-command-events))))))))
 309
 310 (defun gnus-pick-next-page ()
 311   "Go to the next page.  If at the end of the buffer, start reading articles."
 312   (interactive)
 313   (let ((scroll-in-place nil))
 314     (condition-case nil
 315         (scroll-up)
 316       (end-of-buffer (gnus-pick-start-reading)))))
 317
 318 ;;;
 319 ;;; gnus-binary-mode
 320 ;;;
 321
 322 (defvar gnus-binary-mode nil
 323   "Minor mode for providing a binary group interface in Gnus summary buffers.")
 324
 325 (defvar gnus-binary-mode-hook nil
 326   "Hook run in summary binary mode buffers.")
 327
 328 (defvar gnus-binary-mode-map nil)
 329
 330 (unless gnus-binary-mode-map
 331   (setq gnus-binary-mode-map (make-sparse-keymap))
 332
 333   (gnus-define-keys
 334       gnus-binary-mode-map
 335     "g" gnus-binary-show-article))
 336
 337 (defun gnus-binary-make-menu-bar ()
 338   (unless (boundp 'gnus-binary-menu)
 339     (easy-menu-define
 340       gnus-binary-menu gnus-binary-mode-map ""
 341       '("Pick"
 342         ["Switch binary mode off" gnus-binary-mode t]))))
 343
 344 (defun gnus-binary-mode (&optional arg)
 345   "Minor mode for providing a binary group interface in Gnus summary buffers."
 346   (interactive "P")
 347   (when (eq major-mode 'gnus-summary-mode)
 348     (make-local-variable 'gnus-binary-mode)
 349     (setq gnus-binary-mode
 350           (if (null arg) (not gnus-binary-mode)
 351             (> (prefix-numeric-value arg) 0)))
 352     (when gnus-binary-mode
 353       ;; Make sure that we don't select any articles upon group entry.
 354       (make-local-variable 'gnus-auto-select-first)
 355       (setq gnus-auto-select-first nil)
 356       (make-local-variable 'gnus-summary-display-article-function)
 357       (setq gnus-summary-display-article-function 'gnus-binary-display-article)
 358       ;; Set up the menu.
 359       (when (gnus-visual-p 'binary-menu 'menu)
 360         (gnus-binary-make-menu-bar))
 361       (add-minor-mode 'gnus-binary-mode " Binary" gnus-binary-mode-map)
 362       (gnus-run-hooks 'gnus-binary-mode-hook))))
 363
 364 (defun gnus-binary-display-article (article &optional all-header)
 365   "Run ARTICLE through the binary decode functions."
 366   (when (gnus-summary-goto-subject article)
 367     (let ((gnus-view-pseudos (or gnus-view-pseudos 'automatic)))
 368       (gnus-uu-decode-uu))))
 369
 370 (defun gnus-binary-show-article (&optional arg)
 371   "Bypass the binary functions and show the article."
 372   (interactive "P")
 373   (let (gnus-summary-display-article-function)
 374     (gnus-summary-show-article arg)))
 375
 376 ;;;
 377 ;;; gnus-tree-mode
 378 ;;;
 379
 380 (defcustom gnus-tree-line-format "%(%[%3,3n%]%)"
 381   "Format of tree elements."
 382   :type 'string
 383   :group 'gnus-summary-tree)
 384
 385 (defcustom gnus-tree-minimize-window t
 386   "If non-nil, minimize the tree buffer window.
 387 If a number, never let the tree buffer grow taller than that number of
 388 lines."
 389   :type '(choice boolean
 390                  integer)
 391   :group 'gnus-summary-tree)
 392
 393 (defcustom gnus-selected-tree-face 'modeline
 394   "*Face used for highlighting selected articles in the thread tree."
 395   :type 'face
 396   :group 'gnus-summary-tree)
 397
 398 (defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
 399                              (?\{ . ?\}) (?< . ?>))
 400   "Brackets used in tree nodes.")
 401
 402 (defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
 403   "Characters used to connect parents with children.")
 404
 405 (defcustom gnus-tree-mode-line-format "Gnus: %%b %S %Z"
 406   "*The format specification for the tree mode line."
 407   :type 'string
 408   :group 'gnus-summary-tree)
 409
 410 (defcustom gnus-generate-tree-function 'gnus-generate-vertical-tree
 411   "*Function for generating a thread tree.
 412 Two predefined functions are available:
 413 `gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'."
 414   :type '(radio (function-item gnus-generate-vertical-tree)
 415                 (function-item gnus-generate-horizontal-tree)
 416                 (function :tag "Other" nil))
 417   :group 'gnus-summary-tree)
 418
 419 (defcustom gnus-tree-mode-hook nil
 420   "*Hook run in tree mode buffers."
 421   :type 'hook
 422   :group 'gnus-summary-tree)
 423
 424 (when (featurep 'xemacs)
 425   (add-hook 'gnus-tree-mode-hook 'gnus-xmas-tree-menu-add)
 426   (add-hook 'gnus-tree-mode-hook 'gnus-xmas-switch-horizontal-scrollbar-off))
 427
 428
 429 ;;; Internal variables.
 430
 431 (defvar gnus-tree-line-format-alist
 432   `((?n gnus-tmp-name ?s)
 433     (?f gnus-tmp-from ?s)
 434     (?N gnus-tmp-number ?d)
 435     (?\[ gnus-tmp-open-bracket ?c)
 436     (?\] gnus-tmp-close-bracket ?c)
 437     (?s gnus-tmp-subject ?s)))
 438
 439 (defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
 440
 441 (defvar gnus-tree-mode-line-format-spec nil)
 442 (defvar gnus-tree-line-format-spec nil)
 443
 444 (defvar gnus-tree-node-length nil)
 445 (defvar gnus-selected-tree-overlay nil)
 446
 447 (defvar gnus-tree-displayed-thread nil)
 448 (defvar gnus-tree-inhibit nil)
 449
 450 (defvar gnus-tree-mode-map nil)
 451 (put 'gnus-tree-mode 'mode-class 'special)
 452
 453 (unless gnus-tree-mode-map
 454   (setq gnus-tree-mode-map (make-keymap))
 455   (suppress-keymap gnus-tree-mode-map)
 456   (gnus-define-keys
 457       gnus-tree-mode-map
 458     "\r" gnus-tree-select-article
 459     gnus-mouse-2 gnus-tree-pick-article
 460     "\C-?" gnus-tree-read-summary-keys
 461     "h" gnus-tree-show-summary
 462
 463     "\C-c\C-i" gnus-info-find-node)
 464
 465   (substitute-key-definition
 466    'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map))
 467
 468 (defun gnus-tree-make-menu-bar ()
 469   (unless (boundp 'gnus-tree-menu)
 470     (easy-menu-define
 471       gnus-tree-menu gnus-tree-mode-map ""
 472       '("Tree"
 473         ["Select article" gnus-tree-select-article t]))))
 474
 475 (defun gnus-tree-mode ()
 476   "Major mode for displaying thread trees."
 477   (interactive)
 478   (gnus-set-format 'tree-mode)
 479   (gnus-set-format 'tree t)
 480   (when (gnus-visual-p 'tree-menu 'menu)
 481     (gnus-tree-make-menu-bar))
 482   (kill-all-local-variables)
 483   (gnus-simplify-mode-line)
 484   (setq mode-name "Tree")
 485   (setq major-mode 'gnus-tree-mode)
 486   (use-local-map gnus-tree-mode-map)
 487   (buffer-disable-undo)
 488   (setq buffer-read-only t)
 489   (setq truncate-lines t)
 490   (save-excursion
 491     (gnus-set-work-buffer)
 492     (gnus-tree-node-insert (make-mail-header "") nil)
 493     (setq gnus-tree-node-length (1- (point))))
 494   (gnus-run-mode-hooks 'gnus-tree-mode-hook))
 495
 496 (defun gnus-tree-read-summary-keys (&optional arg)
 497   "Read a summary buffer key sequence and execute it."
 498   (interactive "P")
 499   (unless gnus-tree-inhibit
 500     (let ((buf (current-buffer))
 501           (gnus-tree-inhibit t)
 502           win)
 503       (set-buffer gnus-article-buffer)
 504       (gnus-article-read-summary-keys arg nil t)
 505       (when (setq win (get-buffer-window buf))
 506         (select-window win)
 507         (when gnus-selected-tree-overlay
 508           (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
 509         (gnus-tree-minimize)))))
 510
 511 (defun gnus-tree-show-summary ()
 512   "Reconfigure windows to show summary buffer."
 513   (interactive)
 514   (if (not (gnus-buffer-live-p gnus-summary-buffer))
 515       (error "There is no summary buffer for this tree buffer")
 516     (gnus-configure-windows 'article)
 517     (gnus-summary-goto-subject gnus-current-article)))
 518
 519 (defun gnus-tree-select-article (article)
 520   "Select the article under point, if any."
 521   (interactive (list (gnus-tree-article-number)))
 522   (let ((buf (current-buffer)))
 523     (when article
 524       (with-current-buffer gnus-summary-buffer
 525         (gnus-summary-goto-article article))
 526       (select-window (get-buffer-window buf)))))
 527
 528 (defun gnus-tree-pick-article (e)
 529   "Select the article under the mouse pointer."
 530   (interactive "e")
 531   (mouse-set-point e)
 532   (gnus-tree-select-article (gnus-tree-article-number)))
 533
 534 (defun gnus-tree-article-number ()
 535   (get-text-property (point) 'gnus-number))
 536
 537 (defun gnus-tree-article-region (article)
 538   "Return a cons with BEG and END of the article region."
 539   (let ((pos (text-property-any
 540               (point-min) (point-max) 'gnus-number article)))
 541     (when pos
 542       (cons pos (next-single-property-change pos 'gnus-number)))))
 543
 544 (defun gnus-tree-goto-article (article)
 545   (let ((pos (text-property-any
 546               (point-min) (point-max) 'gnus-number article)))
 547     (when pos
 548       (goto-char pos))))
 549
 550 (defun gnus-tree-recenter ()
 551   "Center point in the tree window."
 552   (let ((selected (selected-window))
 553         (tree-window (gnus-get-buffer-window gnus-tree-buffer t)))
 554     (when tree-window
 555       (select-window tree-window)
 556       (when gnus-selected-tree-overlay
 557         (goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
 558       (let* ((top (cond ((< (window-height) 4) 0)
 559                         ((< (window-height) 7) 1)
 560                         (t 2)))
 561              (height (1- (window-height)))
 562              (bottom (save-excursion (goto-char (point-max))
 563                                      (forward-line (- height))
 564                                      (point))))
 565       ;; Set the window start to either `bottom', which is the biggest
 566         ;; possible valid number, or the second line from the top,
 567         ;; whichever is the least.
 568         (set-window-start
 569          tree-window (min bottom (save-excursion
 570                                    (forward-line (- top)) (point)))))
 571       (select-window selected))))
 572
 573 (defun gnus-get-tree-buffer ()
 574   "Return the tree buffer properly initialized."
 575   (with-current-buffer (gnus-get-buffer-create gnus-tree-buffer)
 576     (unless (eq major-mode 'gnus-tree-mode)
 577       (gnus-tree-mode))
 578     (current-buffer)))
 579
 580 (defun gnus-tree-minimize ()
 581   (when (and gnus-tree-minimize-window
 582              (not (one-window-p)))
 583     (let ((windows 0)
 584           tot-win-height)
 585       (walk-windows (lambda (window) (incf windows)))
 586       (setq tot-win-height
 587             (- (frame-height)
 588                (* window-min-height (1- windows))
 589                2))
 590       (let* ((window-min-height 2)
 591              (height (count-lines (point-min) (point-max)))
 592              (min (max (1- window-min-height) height))
 593              (tot (if (numberp gnus-tree-minimize-window)
 594                       (min gnus-tree-minimize-window min)
 595                     min))
 596              (win (get-buffer-window (current-buffer)))
 597              (wh (and win (1- (window-height win)))))
 598         (setq tot (min tot tot-win-height))
 599         (when (and win
 600                    (not (eq tot wh)))
 601           (let ((selected (selected-window)))
 602             (when (ignore-errors (select-window win))
 603               (enlarge-window (- tot wh))
 604               (select-window selected))))))))
 605
 606 ;;; Generating the tree.
 607
 608 (defun gnus-tree-node-insert (header sparse &optional adopted)
 609   (let* ((dummy (stringp header))
 610          (header (if (vectorp header) header
 611                    (progn
 612                      (setq header (make-mail-header "*****"))
 613                      (mail-header-set-number header 0)
 614                      (mail-header-set-lines header 0)
 615                      (mail-header-set-chars header 0)
 616                      header)))
 617          (gnus-tmp-from (mail-header-from header))
 618          (gnus-tmp-subject (mail-header-subject header))
 619          (gnus-tmp-number (mail-header-number header))
 620          (gnus-tmp-name
 621           (cond
 622            ((string-match "(.+)" gnus-tmp-from)
 623             (substring gnus-tmp-from
 624                        (1+ (match-beginning 0)) (1- (match-end 0))))
 625            ((string-match "<[^>]+> *$" gnus-tmp-from)
 626             (let ((beg (match-beginning 0)))
 627               (or (and (string-match "^\"[^\"]*\"" gnus-tmp-from)
 628                        (substring gnus-tmp-from (1+ (match-beginning 0))
 629                                   (1- (match-end 0))))
 630                   (substring gnus-tmp-from 0 beg))))
 631            ((memq gnus-tmp-number sparse)
 632             "***")
 633            (t gnus-tmp-from)))
 634          (gnus-tmp-open-bracket
 635           (cond ((memq gnus-tmp-number sparse)
 636                  (caadr gnus-tree-brackets))
 637                 (dummy (caaddr gnus-tree-brackets))
 638                 (adopted (car (nth 3 gnus-tree-brackets)))
 639                 (t (caar gnus-tree-brackets))))
 640          (gnus-tmp-close-bracket
 641           (cond ((memq gnus-tmp-number sparse)
 642                  (cdadr gnus-tree-brackets))
 643                 (adopted (cdr (nth 3 gnus-tree-brackets)))
 644                 (dummy
 645                  (cdaddr gnus-tree-brackets))
 646                 (t (cdar gnus-tree-brackets))))
 647          (buffer-read-only nil)
 648          beg end)
 649     (gnus-add-text-properties
 650      (setq beg (point))
 651      (setq end (progn (eval gnus-tree-line-format-spec) (point)))
 652      (list 'gnus-number gnus-tmp-number))
 653     (when (or t (gnus-visual-p 'tree-highlight 'highlight))
 654       (gnus-tree-highlight-node gnus-tmp-number beg end))))
 655
 656 (defun gnus-tree-highlight-node (article beg end)
 657   "Highlight current line according to `gnus-summary-highlight'."
 658   (let ((list gnus-summary-highlight)
 659         face)
 660     (with-current-buffer gnus-summary-buffer
 661       (let* ((score (or (cdr (assq article gnus-newsgroup-scored))
 662                         gnus-summary-default-score 0))
 663              (default gnus-summary-default-score)
 664              (default-high gnus-summary-default-high-score)
 665              (default-low gnus-summary-default-low-score)
 666              (uncached (memq article gnus-newsgroup-undownloaded))
 667              (downloaded (not uncached))
 668              (mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
 669         ;; Eval the cars of the lists until we find a match.
 670         (while (and list
 671                     (not (eval (caar list))))
 672           (setq list (cdr list)))))
 673     (unless (eq (setq face (cdar list)) (get-text-property beg 'face))
 674       (gnus-put-text-property-excluding-characters-with-faces
 675        beg end 'face
 676        (if (boundp face) (symbol-value face) face)))))
 677
 678 (defun gnus-tree-indent (level)
 679   (insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? )))
 680
 681 (defvar gnus-tmp-limit)
 682 (defvar gnus-tmp-sparse)
 683 (defvar gnus-tmp-indent)
 684
 685 (defun gnus-generate-tree (thread)
 686   "Generate a thread tree for THREAD."
 687   (with-current-buffer (gnus-get-tree-buffer)
 688     (let ((buffer-read-only nil)
 689           (gnus-tmp-indent 0))
 690       (erase-buffer)
 691       (funcall gnus-generate-tree-function thread 0)
 692       (gnus-set-mode-line 'tree)
 693       (goto-char (point-min))
 694       (gnus-tree-minimize)
 695       (gnus-tree-recenter)
 696       (let ((selected (selected-window)))
 697         (when (gnus-get-buffer-window (set-buffer gnus-tree-buffer) t)
 698           (select-window (gnus-get-buffer-window (set-buffer gnus-tree-buffer) t))
 699           (gnus-horizontal-recenter)
 700           (select-window selected))))))
 701
 702 (defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted)
 703   "Generate a horizontal tree."
 704   (let* ((dummy (stringp (car thread)))
 705          (do (or dummy
 706                  (and (car thread)
 707                       (memq (mail-header-number (car thread))
 708                             gnus-tmp-limit))))
 709          col beg)
 710     (if (not do)
 711         ;; We don't want this article.
 712         (setq thread (cdr thread))
 713       (if (not (bolp))
 714           ;; Not the first article on the line, so we insert a "-".
 715           (insert (car gnus-tree-parent-child-edges))
 716         ;; If the level isn't zero, then we insert some indentation.
 717         (unless (zerop level)
 718           (gnus-tree-indent level)
 719           (insert (cadr gnus-tree-parent-child-edges))
 720           (setq col (- (setq beg (point)) (point-at-bol) 1))
 721           ;; Draw "|" lines upwards.
 722           (while (progn
 723                    (forward-line -1)
 724                    (forward-char col)
 725                    (eq (char-after) ? ))
 726             (delete-char 1)
 727             (insert (caddr gnus-tree-parent-child-edges)))
 728           (goto-char beg)))
 729       (setq dummyp nil)
 730       ;; Insert the article node.
 731       (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted))
 732     (if (null thread)
 733         ;; End of the thread, so we go to the next line.
 734         (unless (bolp)
 735           (insert "\n"))
 736       ;; Recurse downwards in all children of this article.
 737       (while thread
 738         (gnus-generate-horizontal-tree
 739          (pop thread) (if do (1+ level) level)
 740          (or dummyp dummy) dummy)))))
 741
 742 (defsubst gnus-tree-indent-vertical ()
 743   (let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent)
 744                 (- (point) (point-at-bol)))))
 745     (when (> len 0)
 746       (insert (make-string len ? )))))
 747
 748 (defsubst gnus-tree-forward-line (n)
 749   (while (>= (decf n) 0)
 750     (unless (zerop (forward-line 1))
 751       (end-of-line)
 752       (insert "\n")))
 753   (end-of-line))
 754
 755 (defun gnus-generate-vertical-tree (thread level &optional dummyp adopted)
 756   "Generate a vertical tree."
 757   (let* ((dummy (stringp (car thread)))
 758          (do (or dummy
 759                  (and (car thread)
 760                       (memq (mail-header-number (car thread))
 761                             gnus-tmp-limit))))
 762          beg)
 763     (if (not do)
 764         ;; We don't want this article.
 765         (setq thread (cdr thread))
 766       (if (not (save-excursion (beginning-of-line) (bobp)))
 767           ;; Not the first article on the line, so we insert a "-".
 768           (progn
 769             (gnus-tree-indent-vertical)
 770             (insert (make-string (/ gnus-tree-node-length 2) ? ))
 771             (insert (caddr gnus-tree-parent-child-edges))
 772             (gnus-tree-forward-line 1))
 773         ;; If the level isn't zero, then we insert some indentation.
 774         (unless (zerop gnus-tmp-indent)
 775           (gnus-tree-forward-line (1- (* 2 level)))
 776           (gnus-tree-indent-vertical)
 777           (delete-char -1)
 778           (insert (cadr gnus-tree-parent-child-edges))
 779           (setq beg (point))
 780           (forward-char -1)
 781           ;; Draw "-" lines leftwards.
 782           (while (and (not (bobp))
 783                       (eq (char-after (1- (point))) ? ))
 784             (delete-char -1)
 785             (insert (car gnus-tree-parent-child-edges))
 786             (forward-char -1))
 787           (goto-char beg)
 788           (gnus-tree-forward-line 1)))
 789       (setq dummyp nil)
 790       ;; Insert the article node.
 791       (gnus-tree-indent-vertical)
 792       (gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)
 793       (gnus-tree-forward-line 1))
 794     (if (null thread)
 795         ;; End of the thread, so we go to the next line.
 796         (progn
 797           (goto-char (point-min))
 798           (end-of-line)
 799           (incf gnus-tmp-indent))
 800       ;; Recurse downwards in all children of this article.
 801       (while thread
 802         (gnus-generate-vertical-tree
 803          (pop thread) (if do (1+ level) level)
 804          (or dummyp dummy) dummy)))))
 805
 806 ;;; Interface functions.
 807
 808 (defun gnus-possibly-generate-tree (article &optional force)
 809   "Generate the thread tree for ARTICLE if it isn't displayed already."
 810   (when (with-current-buffer gnus-summary-buffer
 811           (and gnus-use-trees
 812                gnus-show-threads
 813                (vectorp (gnus-summary-article-header article))))
 814     (save-excursion
 815       (let ((top (with-current-buffer gnus-summary-buffer
 816                    (gnus-cut-thread
 817                     (gnus-remove-thread
 818                      (mail-header-id
 819                       (gnus-summary-article-header article))
 820                      t))))
 821             (gnus-tmp-limit gnus-newsgroup-limit)
 822             (gnus-tmp-sparse gnus-newsgroup-sparse))
 823         (when (or force
 824                   (not (eq top gnus-tree-displayed-thread)))
 825           (gnus-generate-tree top)
 826           (setq gnus-tree-displayed-thread top))))))
 827
 828 (defun gnus-tree-open (group)
 829   (gnus-get-tree-buffer))
 830
 831 (defun gnus-tree-close (group)
 832   (gnus-kill-buffer gnus-tree-buffer))
 833
 834 (defun gnus-tree-perhaps-minimize ()
 835   (when (and gnus-tree-minimize-window
 836              (get-buffer gnus-tree-buffer))
 837     (with-current-buffer gnus-tree-buffer
 838       (gnus-tree-minimize))))
 839
 840 (defun gnus-highlight-selected-tree (article)
 841   "Highlight the selected article in the tree."
 842   (let ((buf (current-buffer))
 843         region)
 844     (set-buffer gnus-tree-buffer)
 845     (when (setq region (gnus-tree-article-region article))
 846       (when (or (not gnus-selected-tree-overlay)
 847                 (gnus-extent-detached-p gnus-selected-tree-overlay))
 848         ;; Create a new overlay.
 849         (gnus-overlay-put
 850          (setq gnus-selected-tree-overlay
 851                (gnus-make-overlay (point-min) (1+ (point-min))))
 852          'face gnus-selected-tree-face))
 853       ;; Move the overlay to the article.
 854       (gnus-move-overlay
 855        gnus-selected-tree-overlay (goto-char (car region)) (cdr region))
 856       (gnus-tree-minimize)
 857       (gnus-tree-recenter)
 858       (let ((selected (selected-window)))
 859         (when (gnus-get-buffer-window (set-buffer gnus-tree-buffer) t)
 860           (select-window (gnus-get-buffer-window (set-buffer gnus-tree-buffer) t))
 861           (gnus-horizontal-recenter)
 862           (select-window selected))))
 863 ;; If we remove this save-excursion, it updates the wrong mode lines?!?
 864     (with-current-buffer gnus-tree-buffer
 865       (gnus-set-mode-line 'tree))
 866     (set-buffer buf)))
 867
 868 (defun gnus-tree-highlight-article (article face)
 869   (with-current-buffer (gnus-get-tree-buffer)
 870     (let (region)
 871       (when (setq region (gnus-tree-article-region article))
 872         (gnus-put-text-property (car region) (cdr region) 'face face)
 873         (set-window-point
 874          (gnus-get-buffer-window (current-buffer) t) (cdr region))))))
 875
 876 ;;;
 877 ;;; gnus-carpal
 878 ;;;
 879
 880 (defvar gnus-carpal-group-buffer-buttons
 881   '(("next" . gnus-group-next-unread-group)
 882     ("prev" . gnus-group-prev-unread-group)
 883     ("read" . gnus-group-read-group)
 884     ("select" . gnus-group-select-group)
 885     ("catch-up" . gnus-group-catchup-current)
 886     ("new-news" . gnus-group-get-new-news-this-group)
 887     ("toggle-sub" . gnus-group-unsubscribe-current-group)
 888     ("subscribe" . gnus-group-unsubscribe-group)
 889     ("kill" . gnus-group-kill-group)
 890     ("yank" . gnus-group-yank-group)
 891     ("describe" . gnus-group-describe-group)
 892     "list"
 893     ("subscribed" . gnus-group-list-groups)
 894     ("all" . gnus-group-list-all-groups)
 895     ("killed" . gnus-group-list-killed)
 896     ("zombies" . gnus-group-list-zombies)
 897     ("matching" . gnus-group-list-matching)
 898     ("post" . gnus-group-post-news)
 899     ("mail" . gnus-group-mail)
 900     ("local" . (lambda () (interactive) (gnus-group-news 0)))
 901     ("rescan" . gnus-group-get-new-news)
 902     ("browse-foreign" . gnus-group-browse-foreign)
 903     ("exit" . gnus-group-exit)))
 904
 905 (defvar gnus-carpal-summary-buffer-buttons
 906   '("mark"
 907     ("read" . gnus-summary-mark-as-read-forward)
 908     ("tick" . gnus-summary-tick-article-forward)
 909     ("clear" . gnus-summary-clear-mark-forward)
 910     ("expirable" . gnus-summary-mark-as-expirable)
 911     "move"
 912     ("scroll" . gnus-summary-next-page)
 913     ("next-unread" . gnus-summary-next-unread-article)
 914     ("prev-unread" . gnus-summary-prev-unread-article)
 915     ("first" . gnus-summary-first-unread-article)
 916     ("best" . gnus-summary-best-unread-article)
 917     "article"
 918     ("headers" . gnus-summary-toggle-header)
 919     ("uudecode" . gnus-uu-decode-uu)
 920     ("enter-digest" . gnus-summary-enter-digest-group)
 921     ("fetch-parent" . gnus-summary-refer-parent-article)
 922     "mail"
 923     ("move" . gnus-summary-move-article)
 924     ("copy" . gnus-summary-copy-article)
 925     ("respool" . gnus-summary-respool-article)
 926     "threads"
 927     ("lower" . gnus-summary-lower-thread)
 928     ("kill" . gnus-summary-kill-thread)
 929     "post"
 930     ("post" . gnus-summary-post-news)
 931     ("local" . gnus-summary-news-other-window)
 932     ("mail" . gnus-summary-mail-other-window)
 933     ("followup" . gnus-summary-followup-with-original)
 934     ("reply" . gnus-summary-reply-with-original)
 935     ("cancel" . gnus-summary-cancel-article)
 936     "misc"
 937     ("exit" . gnus-summary-exit)
 938     ("fed-up" . gnus-summary-catchup-and-goto-next-group)))
 939
 940 (defvar gnus-carpal-server-buffer-buttons
 941   '(("add" . gnus-server-add-server)
 942     ("browse" . gnus-server-browse-server)
 943     ("list" . gnus-server-list-servers)
 944     ("kill" . gnus-server-kill-server)
 945     ("yank" . gnus-server-yank-server)
 946     ("copy" . gnus-server-copy-server)
 947     ("exit" . gnus-server-exit)))
 948
 949 (defvar gnus-carpal-browse-buffer-buttons
 950   '(("subscribe" . gnus-browse-unsubscribe-current-group)
 951     ("exit" . gnus-browse-exit)))
 952
 953 (defvar gnus-carpal-group-buffer "*Carpal Group*")
 954 (defvar gnus-carpal-summary-buffer "*Carpal Summary*")
 955 (defvar gnus-carpal-server-buffer "*Carpal Server*")
 956 (defvar gnus-carpal-browse-buffer "*Carpal Browse*")
 957
 958 (defvar gnus-carpal-attached-buffer nil)
 959
 960 (defvar gnus-carpal-mode-hook nil
 961   "*Hook run in carpal mode buffers.")
 962
 963 (defvar gnus-carpal-button-face 'bold
 964   "*Face used on carpal buttons.")
 965
 966 (defvar gnus-carpal-header-face 'bold-italic
 967   "*Face used on carpal buffer headers.")
 968
 969 (defvar gnus-carpal-mode-map nil)
 970 (put 'gnus-carpal-mode 'mode-class 'special)
 971
 972 (if gnus-carpal-mode-map
 973     nil
 974   (setq gnus-carpal-mode-map (make-keymap))
 975   (suppress-keymap gnus-carpal-mode-map)
 976   (define-key gnus-carpal-mode-map " " 'gnus-carpal-select)
 977   (define-key gnus-carpal-mode-map "\r" 'gnus-carpal-select)
 978   (define-key gnus-carpal-mode-map gnus-mouse-2 'gnus-carpal-mouse-select))
 979
 980 (defun gnus-carpal-mode ()
 981   "Major mode for clicking buttons.
 982
 983 All normal editing commands are switched off.
 984 \\<gnus-carpal-mode-map>
 985 The following commands are available:
 986
 987 \\{gnus-carpal-mode-map}"
 988   (interactive)
 989   (kill-all-local-variables)
 990   (setq mode-line-modified (cdr gnus-mode-line-modified))
 991   (setq major-mode 'gnus-carpal-mode)
 992   (setq mode-name "Gnus Carpal")
 993   (setq mode-line-process nil)
 994   (use-local-map gnus-carpal-mode-map)
 995   (buffer-disable-undo)
 996   (setq buffer-read-only t)
 997   (make-local-variable 'gnus-carpal-attached-buffer)
 998   (gnus-run-mode-hooks 'gnus-carpal-mode-hook))
 999
1000 (defun gnus-carpal-setup-buffer (type)
1001   (let ((buffer (symbol-value (intern (format "gnus-carpal-%s-buffer" type)))))
1002     (if (get-buffer buffer)
1003         ()
1004       (with-current-buffer (gnus-get-buffer-create buffer)
1005         (gnus-carpal-mode)
1006         (setq gnus-carpal-attached-buffer
1007               (intern (format "gnus-%s-buffer" type)))
1008         (let ((buttons (symbol-value
1009                         (intern (format "gnus-carpal-%s-buffer-buttons"
1010                                         type))))
1011               (buffer-read-only nil)
1012               button)
1013           (while buttons
1014             (setq button (car buttons)
1015                   buttons (cdr buttons))
1016             (if (stringp button)
1017                 (set-text-properties
1018                  (point)
1019                  (prog2 (insert button) (point) (insert " "))
1020                  (list 'face gnus-carpal-header-face))
1021               (set-text-properties
1022                (point)
1023                (prog2 (insert (car button)) (point) (insert " "))
1024                (list 'gnus-callback (cdr button)
1025                      'face gnus-carpal-button-face
1026                      gnus-mouse-face-prop 'highlight))))
1027           (let ((fill-column (- (window-width) 2)))
1028             (fill-region (point-min) (point-max)))
1029           (set-window-point (get-buffer-window (current-buffer))
1030                             (point-min)))))))
1031
1032 (defun gnus-carpal-select ()
1033   "Select the button under point."
1034   (interactive)
1035   (let ((func (get-text-property (point) 'gnus-callback)))
1036     (if (null func)
1037         ()
1038       (pop-to-buffer (symbol-value gnus-carpal-attached-buffer))
1039       (call-interactively func))))
1040
1041 (defun gnus-carpal-mouse-select (event)
1042   "Select the button under the mouse pointer."
1043   (interactive "e")
1044   (mouse-set-point event)
1045   (gnus-carpal-select))
1046
1047 ;;; Allow redefinition of functions.
1048 (gnus-ems-redefine)
1049
1050 (provide 'gnus-salt)
1051
1052 ;; arch-tag: 35449164-77b3-4398-bcbd-a2e3e998f810
1053 ;;; gnus-salt.el ends here