1
0
mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-12-22 10:26:20 +00:00
emacs/lisp/gnus/gnus-salt.el
Gnus developers 4e2b87d871 Misc bugfixes made in Gnus master
2014-01-31 Alex Schroeder <alex@gnu.org> (tiny change)
  * gnus-tut.txt (Message-ID): Typo fix (bug#15556).
2014-01-31 Dave Abrahams <dave@boostpro.com>
  * gnus-salt.el (gnus-tree-highlight-article): Don't move point around
  in the summary buffer (bug#13769).
2014-01-31 Lars Ingebrigtsen <larsi@gnus.org>
  * gnus-art.el (gnus-article-setup-buffer): Refresh the summary buffer
  name if we're using a single article buffer. Otherwise, it may point
  to a killed buffer (bug#13756).
2014-01-30 Lars Ingebrigtsen <larsi@gnus.org>
  * nnmail.el (nnmail-split-it): Instead of redoing the search to restore
  the match data, just save and restore it explictly (bug#12375).
  * gnus-sum.el (gnus-summary-read-group-1): Initialize the spam code if
  that's needed.
  * spam.el (spam-initialize): Allow calling repeatedly, but only run the
  the code once (bug#9069).
2014-01-31 01:56:00 +00:00

898 lines
30 KiB
EmacsLisp

;;; gnus-salt.el --- alternate summary mode interfaces for Gnus
;; Copyright (C) 1996-1999, 2001-2014 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: news
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(eval-when-compile (require 'cl))
(eval-when-compile
(when (featurep 'xemacs)
(require 'easy-mmode))) ; for `define-minor-mode'
(require 'gnus)
(require 'gnus-sum)
(require 'gnus-win)
;;;
;;; gnus-pick-mode
;;;
(defcustom gnus-pick-display-summary nil
"*Display summary while reading."
:type 'boolean
:group 'gnus-summary-pick)
(defcustom gnus-pick-mode-hook nil
"Hook run in summary pick mode buffers."
:type 'hook
:group 'gnus-summary-pick)
(when (featurep 'xemacs)
(add-hook 'gnus-pick-mode-hook 'gnus-xmas-pick-menu-add))
(defcustom gnus-mark-unpicked-articles-as-read nil
"*If non-nil, mark all unpicked articles as read."
:type 'boolean
:group 'gnus-summary-pick)
(defcustom gnus-pick-elegant-flow t
"If non-nil, `gnus-pick-start-reading' runs
`gnus-summary-next-group' when no articles have been picked."
:type 'boolean
:group 'gnus-summary-pick)
(defcustom gnus-summary-pick-line-format
"%-5P %U\%R\%z\%I\%(%[%4L: %-23,23n%]%) %s\n"
"*The format specification of the lines in pick buffers.
It accepts the same format specs that `gnus-summary-line-format' does."
:type 'string
:group 'gnus-summary-pick)
;;; Internal variables.
(defvar gnus-pick-mode-map
(let ((map (make-sparse-keymap)))
(gnus-define-keys map
" " gnus-pick-next-page
"u" gnus-pick-unmark-article-or-thread
"." gnus-pick-article-or-thread
gnus-down-mouse-2 gnus-pick-mouse-pick-region
"\r" gnus-pick-start-reading)
map))
(defun gnus-pick-make-menu-bar ()
(unless (boundp 'gnus-pick-menu)
(easy-menu-define
gnus-pick-menu gnus-pick-mode-map ""
'("Pick"
("Pick"
["Article" gnus-summary-mark-as-processable t]
["Thread" gnus-uu-mark-thread t]
["Region" gnus-uu-mark-region t]
["Regexp" gnus-uu-mark-by-regexp t]
["Buffer" gnus-uu-mark-buffer t])
("Unpick"
["Article" gnus-summary-unmark-as-processable t]
["Thread" gnus-uu-unmark-thread t]
["Region" gnus-uu-unmark-region t]
["Regexp" gnus-uu-unmark-by-regexp t]
["Buffer" gnus-summary-unmark-all-processable t])
["Start reading" gnus-pick-start-reading t]
["Switch pick mode off" gnus-pick-mode gnus-pick-mode]))))
(eval-when-compile
(when (featurep 'xemacs)
(defvar gnus-pick-mode-on-hook)
(defvar gnus-pick-mode-off-hook)))
(define-minor-mode gnus-pick-mode
"Minor mode for providing a pick-and-read interface in Gnus summary buffers.
\\{gnus-pick-mode-map}"
:lighter " Pick" :keymap gnus-pick-mode-map
(cond
((not (derived-mode-p 'gnus-summary-mode)) (setq gnus-pick-mode nil))
((not gnus-pick-mode)
;; FIXME: a buffer-local minor mode removing globally from a hook??
(remove-hook 'gnus-message-setup-hook 'gnus-pick-setup-message))
(t
;; Make sure that we don't select any articles upon group entry.
(set (make-local-variable 'gnus-auto-select-first) nil)
;; Change line format.
(setq gnus-summary-line-format gnus-summary-pick-line-format)
(setq gnus-summary-line-format-spec nil)
(gnus-update-format-specifications nil 'summary)
(gnus-update-summary-mark-positions)
;; FIXME: a buffer-local minor mode adding globally to a hook??
(add-hook 'gnus-message-setup-hook 'gnus-pick-setup-message)
(set (make-local-variable 'gnus-summary-goto-unread) 'never)
;; Set up the menu.
(when (gnus-visual-p 'pick-menu 'menu)
(gnus-pick-make-menu-bar)))))
(defun gnus-pick-setup-message ()
"Make Message do the right thing on exit."
(when (and (gnus-buffer-live-p gnus-summary-buffer)
(with-current-buffer gnus-summary-buffer
gnus-pick-mode))
(message-add-action
`(gnus-configure-windows ,gnus-current-window-configuration t)
'send 'exit 'postpone 'kill)))
(defvar gnus-pick-line-number 1)
(defun gnus-pick-line-number ()
"Return the current line number."
(if (bobp)
(setq gnus-pick-line-number 1)
(incf gnus-pick-line-number)))
(defun gnus-pick-start-reading (&optional catch-up)
"Start reading the picked articles.
If given a prefix, mark all unpicked articles as read."
(interactive "P")
(if gnus-newsgroup-processable
(progn
(gnus-summary-limit-to-articles nil)
(when (or catch-up gnus-mark-unpicked-articles-as-read)
(gnus-summary-limit-mark-excluded-as-read))
(gnus-summary-first-article)
(gnus-configure-windows
(if gnus-pick-display-summary 'article 'pick) t))
(if gnus-pick-elegant-flow
(progn
(when (or catch-up gnus-mark-unpicked-articles-as-read)
(gnus-summary-catchup nil t))
(if (gnus-group-quit-config gnus-newsgroup-name)
(gnus-summary-exit)
(gnus-summary-next-group)))
(error "No articles have been picked"))))
(defun gnus-pick-goto-article (arg)
"Go to the article number indicated by ARG.
If ARG is an invalid article number, then stay on current line."
(let (pos)
(save-excursion
(goto-char (point-min))
(when (zerop (forward-line (1- (prefix-numeric-value arg))))
(setq pos (point))))
(if (not pos)
(gnus-error 2 "No such line: %s" arg)
(goto-char pos))))
(defun gnus-pick-article (&optional arg)
"Pick the article on the current line.
If ARG, pick the article on that line instead."
(interactive "P")
(when arg
(gnus-pick-goto-article arg))
(gnus-summary-mark-as-processable 1))
(defun gnus-pick-article-or-thread (&optional arg)
"If `gnus-thread-hide-subtree' is t, then pick the thread on the current line.
Otherwise pick the article on the current line.
If ARG, pick the article/thread on that line instead."
(interactive "P")
(when arg
(gnus-pick-goto-article arg))
(if gnus-thread-hide-subtree
(progn
(save-excursion
(gnus-uu-mark-thread))
(forward-line 1))
(gnus-summary-mark-as-processable 1)))
(defun gnus-pick-unmark-article-or-thread (&optional arg)
"If `gnus-thread-hide-subtree' is t, then unmark the thread on current line.
Otherwise unmark the article on current line.
If ARG, unmark thread/article on that line instead."
(interactive "P")
(when arg
(gnus-pick-goto-article arg))
(if gnus-thread-hide-subtree
(save-excursion
(gnus-uu-unmark-thread))
(gnus-summary-unmark-as-processable 1)))
(defun gnus-pick-mouse-pick (e)
(interactive "e")
(mouse-set-point e)
(save-excursion
(gnus-summary-mark-as-processable 1)))
(defun gnus-pick-mouse-pick-region (start-event)
"Pick articles that the mouse is dragged over.
This must be bound to a button-down mouse event."
(interactive "e")
(mouse-minibuffer-check start-event)
(let* ((echo-keystrokes 0)
(start-posn (event-start start-event))
(start-point (posn-point start-posn))
(start-line (1+ (count-lines (point-min) start-point)))
(start-window (posn-window start-posn))
(bounds (gnus-window-edges start-window))
(top (nth 1 bounds))
(bottom (if (window-minibuffer-p start-window)
(nth 3 bounds)
;; Don't count the mode line.
(1- (nth 3 bounds))))
(click-count (1- (event-click-count start-event))))
(setq mouse-selection-click-count click-count)
(setq mouse-selection-click-count-buffer (current-buffer))
(mouse-set-point start-event)
;; In case the down click is in the middle of some intangible text,
;; use the end of that text, and put it in START-POINT.
(when (< (point) start-point)
(goto-char start-point))
(gnus-pick-article)
(setq start-point (point))
;; end-of-range is used only in the single-click case.
;; It is the place where the drag has reached so far
;; (but not outside the window where the drag started).
(let (event end end-point (end-of-range (point)))
(track-mouse
(while (progn
(setq event (cdr (gnus-read-event-char)))
(or (mouse-movement-p event)
(eq (car-safe event) 'switch-frame)))
(if (eq (car-safe event) 'switch-frame)
nil
(setq end (event-end event)
end-point (posn-point end))
(cond
;; Are we moving within the original window?
((and (eq (posn-window end) start-window)
(integer-or-marker-p end-point))
;; Go to START-POINT first, so that when we move to END-POINT,
;; if it's in the middle of intangible text,
;; point jumps in the direction away from START-POINT.
(goto-char start-point)
(goto-char end-point)
(gnus-pick-article)
;; In case the user moved his mouse really fast, pick
;; articles on the line between this one and the last one.
(let* ((this-line (1+ (count-lines (point-min) end-point)))
(min-line (min this-line start-line))
(max-line (max this-line start-line)))
(while (< min-line max-line)
(goto-char (point-min))
(forward-line (1- min-line))
(gnus-pick-article)
(setq min-line (1+ min-line)))
(setq start-line this-line))
(when (zerop (% click-count 3))
(setq end-of-range (point))))
(t
(let ((mouse-row (cdr (cdr (mouse-position)))))
(cond
((null mouse-row))
((< mouse-row top)
(mouse-scroll-subr start-window (- mouse-row top)))
((>= mouse-row bottom)
(mouse-scroll-subr start-window
(1+ (- mouse-row bottom)))))))))))
(when (consp event)
(let (;; (fun (key-binding (vector (car event))))
)
;; Run the binding of the terminating up-event, if possible.
;; In the case of a multiple click, it gives the wrong results,
;; because it would fail to set up a region.
(when nil
;; (and (= (mod mouse-selection-click-count 3) 0) (fboundp fun))
;; In this case, we can just let the up-event execute normally.
(let ((end (event-end event)))
;; Set the position in the event before we replay it,
;; because otherwise it may have a position in the wrong
;; buffer.
(setcar (cdr end) end-of-range)
;; Delete the overlay before calling the function,
;; because delete-overlay increases buffer-modified-tick.
(push event unread-command-events))))))))
(defvar scroll-in-place)
(defun gnus-pick-next-page ()
"Go to the next page. If at the end of the buffer, start reading articles."
(interactive)
(let ((scroll-in-place nil))
(condition-case nil
(scroll-up)
(end-of-buffer (gnus-pick-start-reading)))))
;;;
;;; gnus-binary-mode
;;;
(defvar gnus-binary-mode-hook nil
"Hook run in summary binary mode buffers.")
(defvar gnus-binary-mode-map
(let ((map (make-sparse-keymap)))
(gnus-define-keys map
"g" gnus-binary-show-article)
map))
(defun gnus-binary-make-menu-bar ()
(unless (boundp 'gnus-binary-menu)
(easy-menu-define
gnus-binary-menu gnus-binary-mode-map ""
'("Pick"
["Switch binary mode off" gnus-binary-mode t]))))
(eval-when-compile
(when (featurep 'xemacs)
(defvar gnus-binary-mode-on-hook)
(defvar gnus-binary-mode-off-hook)))
(define-minor-mode gnus-binary-mode
"Minor mode for providing a binary group interface in Gnus summary buffers."
:lighter " Binary" :keymap gnus-binary-mode-map
(cond
((not (derived-mode-p 'gnus-summary-mode)) (setq gnus-binary-mode nil))
(gnus-binary-mode
;; Make sure that we don't select any articles upon group entry.
(make-local-variable 'gnus-auto-select-first)
(setq gnus-auto-select-first nil)
(make-local-variable 'gnus-summary-display-article-function)
(setq gnus-summary-display-article-function 'gnus-binary-display-article)
;; Set up the menu.
(when (gnus-visual-p 'binary-menu 'menu)
(gnus-binary-make-menu-bar)))))
(defun gnus-binary-display-article (article &optional _all-header)
"Run ARTICLE through the binary decode functions."
(when (gnus-summary-goto-subject article)
(let ((gnus-view-pseudos (or gnus-view-pseudos 'automatic)))
(gnus-uu-decode-uu))))
(defun gnus-binary-show-article (&optional arg)
"Bypass the binary functions and show the article."
(interactive "P")
(let (gnus-summary-display-article-function)
(gnus-summary-show-article arg)))
;;;
;;; gnus-tree-mode
;;;
(defcustom gnus-tree-line-format "%(%[%3,3n%]%)"
"Format of tree elements."
:type 'string
:group 'gnus-summary-tree)
(defcustom gnus-tree-minimize-window t
"If non-nil, minimize the tree buffer window.
If a number, never let the tree buffer grow taller than that number of
lines."
:type '(choice boolean
integer)
:group 'gnus-summary-tree)
(defcustom gnus-selected-tree-face 'mode-line
"*Face used for highlighting selected articles in the thread tree."
:type 'face
:group 'gnus-summary-tree)
(defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
(?\{ . ?\}) (?< . ?>))
"Brackets used in tree nodes.")
(defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
"Characters used to connect parents with children.")
(defcustom gnus-tree-mode-line-format "Gnus: %%b %S %Z"
"*The format specification for the tree mode line."
:type 'string
:group 'gnus-summary-tree)
(defcustom gnus-generate-tree-function 'gnus-generate-vertical-tree
"*Function for generating a thread tree.
Two predefined functions are available:
`gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'."
:type '(radio (function-item gnus-generate-vertical-tree)
(function-item gnus-generate-horizontal-tree)
(function :tag "Other" nil))
:group 'gnus-summary-tree)
(defcustom gnus-tree-mode-hook nil
"*Hook run in tree mode buffers."
:type 'hook
:group 'gnus-summary-tree)
(when (featurep 'xemacs)
(add-hook 'gnus-tree-mode-hook 'gnus-xmas-tree-menu-add)
(add-hook 'gnus-tree-mode-hook 'gnus-xmas-switch-horizontal-scrollbar-off))
;;; Internal variables.
(defvar gnus-tmp-name)
(defvar gnus-tmp-from)
(defvar gnus-tmp-number)
(defvar gnus-tmp-open-bracket)
(defvar gnus-tmp-close-bracket)
(defvar gnus-tmp-subject)
(defvar gnus-tree-line-format-alist
`((?n gnus-tmp-name ?s)
(?f gnus-tmp-from ?s)
(?N gnus-tmp-number ?d)
(?\[ gnus-tmp-open-bracket ?c)
(?\] gnus-tmp-close-bracket ?c)
(?s gnus-tmp-subject ?s)))
(defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
(defvar gnus-tree-mode-line-format-spec nil)
(defvar gnus-tree-line-format-spec nil)
(defvar gnus-tree-node-length nil)
(defvar gnus-selected-tree-overlay nil)
(defvar gnus-tree-displayed-thread nil)
(defvar gnus-tree-inhibit nil)
(defvar gnus-tree-mode-map
(let ((map (make-keymap)))
(suppress-keymap map)
(gnus-define-keys
map
"\r" gnus-tree-select-article
gnus-mouse-2 gnus-tree-pick-article
"\C-?" gnus-tree-read-summary-keys
"h" gnus-tree-show-summary
"\C-c\C-i" gnus-info-find-node)
(substitute-key-definition
'undefined 'gnus-tree-read-summary-keys map)
map))
(put 'gnus-tree-mode 'mode-class 'special)
(defun gnus-tree-make-menu-bar ()
(unless (boundp 'gnus-tree-menu)
(easy-menu-define
gnus-tree-menu gnus-tree-mode-map ""
'("Tree"
["Select article" gnus-tree-select-article t]))))
(define-derived-mode gnus-tree-mode fundamental-mode "Tree"
"Major mode for displaying thread trees."
(gnus-set-format 'tree-mode)
(gnus-set-format 'tree t)
(when (gnus-visual-p 'tree-menu 'menu)
(gnus-tree-make-menu-bar))
(gnus-simplify-mode-line)
(buffer-disable-undo)
(setq buffer-read-only t)
(setq truncate-lines t)
(save-current-buffer
(gnus-set-work-buffer)
(gnus-tree-node-insert (make-mail-header "") nil)
(setq gnus-tree-node-length (1- (point)))))
(defun gnus-tree-read-summary-keys (&optional arg)
"Read a summary buffer key sequence and execute it."
(interactive "P")
(unless gnus-tree-inhibit
(let ((buf (current-buffer))
(gnus-tree-inhibit t)
win)
(set-buffer gnus-article-buffer)
(gnus-article-read-summary-keys arg nil t)
(when (setq win (get-buffer-window buf))
(select-window win)
(when gnus-selected-tree-overlay
(goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
(gnus-tree-minimize)))))
(defun gnus-tree-show-summary ()
"Reconfigure windows to show summary buffer."
(interactive)
(if (not (gnus-buffer-live-p gnus-summary-buffer))
(error "There is no summary buffer for this tree buffer")
(gnus-configure-windows 'article)
(gnus-summary-goto-subject gnus-current-article)))
(defun gnus-tree-select-article (article)
"Select the article under point, if any."
(interactive (list (gnus-tree-article-number)))
(let ((buf (current-buffer)))
(when article
(with-current-buffer gnus-summary-buffer
(gnus-summary-goto-article article))
(select-window (get-buffer-window buf)))))
(defun gnus-tree-pick-article (e)
"Select the article under the mouse pointer."
(interactive "e")
(mouse-set-point e)
(gnus-tree-select-article (gnus-tree-article-number)))
(defun gnus-tree-article-number ()
(get-text-property (point) 'gnus-number))
(defun gnus-tree-article-region (article)
"Return a cons with BEG and END of the article region."
(let ((pos (text-property-any
(point-min) (point-max) 'gnus-number article)))
(when pos
(cons pos (next-single-property-change pos 'gnus-number)))))
(defun gnus-tree-recenter ()
"Center point in the tree window."
(let ((selected (selected-window))
(tree-window (gnus-get-buffer-window gnus-tree-buffer t)))
(when tree-window
(select-window tree-window)
(when gnus-selected-tree-overlay
(goto-char (or (gnus-overlay-end gnus-selected-tree-overlay) 1)))
(let* ((top (cond ((< (window-height) 4) 0)
((< (window-height) 7) 1)
(t 2)))
(height (1- (window-height)))
(bottom (save-excursion (goto-char (point-max))
(forward-line (- height))
(point))))
;; Set the window start to either `bottom', which is the biggest
;; possible valid number, or the second line from the top,
;; whichever is the least.
(set-window-start
tree-window (min bottom (save-excursion
(forward-line (- top)) (point)))))
(select-window selected))))
(defun gnus-get-tree-buffer ()
"Return the tree buffer properly initialized."
(with-current-buffer (gnus-get-buffer-create gnus-tree-buffer)
(unless (derived-mode-p 'gnus-tree-mode)
(gnus-tree-mode))
(current-buffer)))
(defun gnus-tree-minimize ()
(when (and gnus-tree-minimize-window
(not (one-window-p)))
(let ((windows 0)
tot-win-height)
(walk-windows (lambda (_window) (incf windows)))
(setq tot-win-height
(- (frame-height)
(* window-min-height (1- windows))
2))
(let* ((window-min-height 2)
(height (count-lines (point-min) (point-max)))
(min (max (1- window-min-height) height))
(tot (if (numberp gnus-tree-minimize-window)
(min gnus-tree-minimize-window min)
min))
(win (get-buffer-window (current-buffer)))
(wh (and win (1- (window-height win)))))
(setq tot (min tot tot-win-height))
(when (and win
(not (eq tot wh)))
(let ((selected (selected-window)))
(when (ignore-errors (select-window win))
(enlarge-window (- tot wh))
(select-window selected))))))))
;;; Generating the tree.
(defun gnus-tree-node-insert (header sparse &optional adopted)
(let* ((dummy (stringp header))
(header (if (vectorp header) header
(progn
(setq header (make-mail-header "*****"))
(mail-header-set-number header 0)
(mail-header-set-lines header 0)
(mail-header-set-chars header 0)
header)))
(gnus-tmp-from (mail-header-from header))
(gnus-tmp-subject (mail-header-subject header))
(gnus-tmp-number (mail-header-number header))
(gnus-tmp-name
(cond
((string-match "(.+)" gnus-tmp-from)
(substring gnus-tmp-from
(1+ (match-beginning 0)) (1- (match-end 0))))
((string-match "<[^>]+> *$" gnus-tmp-from)
(let ((beg (match-beginning 0)))
(or (and (string-match "^\"[^\"]*\"" gnus-tmp-from)
(substring gnus-tmp-from (1+ (match-beginning 0))
(1- (match-end 0))))
(substring gnus-tmp-from 0 beg))))
((memq gnus-tmp-number sparse)
"***")
(t gnus-tmp-from)))
(gnus-tmp-open-bracket
(cond ((memq gnus-tmp-number sparse)
(caadr gnus-tree-brackets))
(dummy (caaddr gnus-tree-brackets))
(adopted (car (nth 3 gnus-tree-brackets)))
(t (caar gnus-tree-brackets))))
(gnus-tmp-close-bracket
(cond ((memq gnus-tmp-number sparse)
(cdadr gnus-tree-brackets))
(adopted (cdr (nth 3 gnus-tree-brackets)))
(dummy
(cdaddr gnus-tree-brackets))
(t (cdar gnus-tree-brackets))))
(buffer-read-only nil)
beg end)
(gnus-add-text-properties
(setq beg (point))
(setq end (progn (eval gnus-tree-line-format-spec) (point)))
(list 'gnus-number gnus-tmp-number))
(when (or t (gnus-visual-p 'tree-highlight 'highlight))
(gnus-tree-highlight-node gnus-tmp-number beg end))))
(defmacro gnus--let-eval (bindings evalsym &rest body)
"Build an environment in which to evaluate expressions.
BINDINGS is a `let'-style list of bindings to use for the environment.
EVALSYM is then bound in BODY to a function that takes a sexp and evaluates
it in the environment specified by BINDINGS."
(declare (indent 2) (debug ((&rest (sym form)) sym body)))
(if (ignore-errors (let ((x 3)) (eq (eval '(- x 1) '((x . 4))) x)))
;; Use lexical vars if possible.
`(let* ((env (list ,@(mapcar (lambda (binding)
`(cons ',(car binding) ,(cadr binding)))
bindings)))
(,evalsym (lambda (exp) (eval exp env))))
,@body)
`(let (,@bindings (,evalsym #'eval)) ,@body)))
(defun gnus-tree-highlight-node (article beg end)
"Highlight current line according to `gnus-summary-highlight'."
(let ((list gnus-summary-highlight)
face)
(with-current-buffer gnus-summary-buffer
(let ((uncached (memq article gnus-newsgroup-undownloaded)))
(gnus--let-eval
((score (or (cdr (assq article gnus-newsgroup-scored))
gnus-summary-default-score 0))
(default gnus-summary-default-score)
(default-high gnus-summary-default-high-score)
(default-low gnus-summary-default-low-score)
(uncached uncached)
(downloaded (not uncached))
(mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
evalfun
;; Eval the cars of the lists until we find a match.
(while (and list
(not (funcall evalfun (caar list))))
(setq list (cdr list))))))
(unless (eq (setq face (cdar list)) (gnus-get-text-property-excluding-characters-with-faces beg 'face))
(gnus-put-text-property-excluding-characters-with-faces
beg end 'face
(if (boundp face) (symbol-value face) face)))))
(defun gnus-tree-indent (level)
(insert (make-string (1- (* (1+ gnus-tree-node-length) level)) ? )))
(defvar gnus-tmp-limit)
(defvar gnus-tmp-sparse)
(defvar gnus-tmp-indent)
(defun gnus-generate-tree (thread)
"Generate a thread tree for THREAD."
(with-current-buffer (gnus-get-tree-buffer)
(let ((buffer-read-only nil)
(gnus-tmp-indent 0))
(erase-buffer)
(funcall gnus-generate-tree-function thread 0)
(gnus-set-mode-line 'tree)
(goto-char (point-min))
(gnus-tree-minimize)
(gnus-tree-recenter)
(let ((selected (selected-window)))
(when (gnus-get-buffer-window (set-buffer gnus-tree-buffer) t)
(select-window (gnus-get-buffer-window (set-buffer gnus-tree-buffer) t))
(gnus-horizontal-recenter)
(select-window selected))))))
(defun gnus-generate-horizontal-tree (thread level &optional dummyp adopted)
"Generate a horizontal tree."
(let* ((dummy (stringp (car thread)))
(do (or dummy
(and (car thread)
(memq (mail-header-number (car thread))
gnus-tmp-limit))))
col beg)
(if (not do)
;; We don't want this article.
(setq thread (cdr thread))
(if (not (bolp))
;; Not the first article on the line, so we insert a "-".
(insert (car gnus-tree-parent-child-edges))
;; If the level isn't zero, then we insert some indentation.
(unless (zerop level)
(gnus-tree-indent level)
(insert (cadr gnus-tree-parent-child-edges))
(setq col (- (setq beg (point)) (point-at-bol) 1))
;; Draw "|" lines upwards.
(while (progn
(forward-line -1)
(forward-char col)
(eq (char-after) ? ))
(delete-char 1)
(insert (caddr gnus-tree-parent-child-edges)))
(goto-char beg)))
(setq dummyp nil)
;; Insert the article node.
(gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted))
(if (null thread)
;; End of the thread, so we go to the next line.
(unless (bolp)
(insert "\n"))
;; Recurse downwards in all children of this article.
(while thread
(gnus-generate-horizontal-tree
(pop thread) (if do (1+ level) level)
(or dummyp dummy) dummy)))))
(defsubst gnus-tree-indent-vertical ()
(let ((len (- (* (1+ gnus-tree-node-length) gnus-tmp-indent)
(- (point) (point-at-bol)))))
(when (> len 0)
(insert (make-string len ? )))))
(defsubst gnus-tree-forward-line (n)
(while (>= (decf n) 0)
(unless (zerop (forward-line 1))
(end-of-line)
(insert "\n")))
(end-of-line))
(defun gnus-generate-vertical-tree (thread level &optional dummyp adopted)
"Generate a vertical tree."
(let* ((dummy (stringp (car thread)))
(do (or dummy
(and (car thread)
(memq (mail-header-number (car thread))
gnus-tmp-limit))))
beg)
(if (not do)
;; We don't want this article.
(setq thread (cdr thread))
(if (not (save-excursion (beginning-of-line) (bobp)))
;; Not the first article on the line, so we insert a "-".
(progn
(gnus-tree-indent-vertical)
(insert (make-string (/ gnus-tree-node-length 2) ? ))
(insert (caddr gnus-tree-parent-child-edges))
(gnus-tree-forward-line 1))
;; If the level isn't zero, then we insert some indentation.
(unless (zerop gnus-tmp-indent)
(gnus-tree-forward-line (1- (* 2 level)))
(gnus-tree-indent-vertical)
(delete-char -1)
(insert (cadr gnus-tree-parent-child-edges))
(setq beg (point))
(forward-char -1)
;; Draw "-" lines leftwards.
(while (and (not (bobp))
(eq (char-after (1- (point))) ? ))
(delete-char -1)
(insert (car gnus-tree-parent-child-edges))
(forward-char -1))
(goto-char beg)
(gnus-tree-forward-line 1)))
(setq dummyp nil)
;; Insert the article node.
(gnus-tree-indent-vertical)
(gnus-tree-node-insert (pop thread) gnus-tmp-sparse adopted)
(gnus-tree-forward-line 1))
(if (null thread)
;; End of the thread, so we go to the next line.
(progn
(goto-char (point-min))
(end-of-line)
(incf gnus-tmp-indent))
;; Recurse downwards in all children of this article.
(while thread
(gnus-generate-vertical-tree
(pop thread) (if do (1+ level) level)
(or dummyp dummy) dummy)))))
;;; Interface functions.
(defun gnus-possibly-generate-tree (article &optional force)
"Generate the thread tree for ARTICLE if it isn't displayed already."
(when (with-current-buffer gnus-summary-buffer
(and gnus-use-trees
gnus-show-threads
(vectorp (gnus-summary-article-header article))))
(save-excursion
(let ((top (with-current-buffer gnus-summary-buffer
(gnus-cut-thread
(gnus-remove-thread
(mail-header-id
(gnus-summary-article-header article))
t))))
(gnus-tmp-limit gnus-newsgroup-limit)
(gnus-tmp-sparse gnus-newsgroup-sparse))
(when (or force
(not (eq top gnus-tree-displayed-thread)))
(gnus-generate-tree top)
(setq gnus-tree-displayed-thread top))))))
(defun gnus-tree-open ()
(gnus-get-tree-buffer))
(defun gnus-tree-close ()
(gnus-kill-buffer gnus-tree-buffer))
(defun gnus-tree-perhaps-minimize ()
(when (and gnus-tree-minimize-window
(get-buffer gnus-tree-buffer))
(with-current-buffer gnus-tree-buffer
(gnus-tree-minimize))))
(defun gnus-highlight-selected-tree (article)
"Highlight the selected article in the tree."
(when (buffer-live-p gnus-tree-buffer)
(let ((buf (current-buffer))
region)
(set-buffer gnus-tree-buffer)
(when (setq region (gnus-tree-article-region article))
(when (or (not gnus-selected-tree-overlay)
(gnus-extent-detached-p gnus-selected-tree-overlay))
;; Create a new overlay.
(gnus-overlay-put
(setq gnus-selected-tree-overlay
(gnus-make-overlay (point-min) (1+ (point-min))))
'face gnus-selected-tree-face))
;; Move the overlay to the article.
(gnus-move-overlay
gnus-selected-tree-overlay (goto-char (car region)) (cdr region))
(gnus-tree-minimize)
(gnus-tree-recenter)
(let ((selected (selected-window)))
(when (gnus-get-buffer-window (set-buffer gnus-tree-buffer) t)
(select-window
(gnus-get-buffer-window (set-buffer gnus-tree-buffer) t))
(gnus-horizontal-recenter)
(select-window selected))))
;; If we remove this save-excursion, it updates the wrong mode lines?!?
(with-current-buffer gnus-tree-buffer
(gnus-set-mode-line 'tree))
(set-buffer buf))))
(defun gnus-tree-highlight-article (article face)
;; The save-excursion here is apparently necessary because
;; `set-window-point' somehow manages to alter the buffer position.
(save-excursion
(with-current-buffer (gnus-get-tree-buffer)
(let (region)
(when (setq region (gnus-tree-article-region article))
(gnus-put-text-property (car region) (cdr region) 'face face)
(set-window-point
(gnus-get-buffer-window (current-buffer) t) (cdr region)))))))
;;; Allow redefinition of functions.
(gnus-ems-redefine)
(provide 'gnus-salt)
;;; gnus-salt.el ends here