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emacs/lisp/gnus-salt.el
Lars Magne Ingebrigtsen 526baa41c5 Initial revision
1996-06-25 22:35:26 +00:00

655 lines
21 KiB
EmacsLisp

;;; gnus-salt.el --- alternate summary mode interfaces for Gnus
;; Copyright (C) 1996 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
;; 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 2, 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;;; Code:
(require 'gnus)
(eval-when-compile (require 'cl))
;;;
;;; gnus-pick-mode
;;;
(defvar gnus-pick-mode nil
"Minor mode for providing a pick-and-read interface in Gnus summary buffers.")
(defvar gnus-pick-display-summary nil
"*Display summary while reading.")
(defvar gnus-pick-mode-hook nil
"Hook run in summary pick mode buffers.")
;;; Internal variables.
(defvar gnus-pick-mode-map nil)
(unless gnus-pick-mode-map
(setq gnus-pick-mode-map (make-sparse-keymap))
(gnus-define-keys
gnus-pick-mode-map
"t" gnus-uu-mark-thread
"T" gnus-uu-unmark-thread
" " gnus-summary-mark-as-processable
"u" gnus-summary-unmark-as-processable
"U" gnus-summary-unmark-all-processable
"v" gnus-uu-mark-over
"r" gnus-uu-mark-region
"R" gnus-uu-unmark-region
"e" gnus-uu-mark-by-regexp
"E" gnus-uu-mark-by-regexp
"b" gnus-uu-mark-buffer
"B" gnus-uu-unmark-buffer
"\r" gnus-pick-start-reading))
(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-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-regexp t]
["Buffer" gnus-uu-unmark-buffer t])
["Start reading" gnus-pick-start-reading t]
["Switch pick mode off" gnus-pick-mode gnus-pick-mode]))))
(defun gnus-pick-mode (&optional arg)
"Minor mode for providing a pick-and-read interface in Gnus summary buffers.
\\{gnus-pick-mode-map}"
(interactive "P")
(when (eq major-mode 'gnus-summary-mode)
(make-local-variable 'gnus-pick-mode)
(setq gnus-pick-mode
(if (null arg) (not gnus-pick-mode)
(> (prefix-numeric-value arg) 0)))
(when gnus-pick-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)
;; Set up the menu.
(when (and menu-bar-mode
(gnus-visual-p 'pick-menu 'menu))
(gnus-pick-make-menu-bar))
(unless (assq 'gnus-pick-mode minor-mode-alist)
(push '(gnus-pick-mode " Pick") minor-mode-alist))
(unless (assq 'gnus-pick-mode minor-mode-map-alist)
(push (cons 'gnus-pick-mode gnus-pick-mode-map)
minor-mode-map-alist))
(run-hooks 'gnus-pick-mode-hook))))
(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")
(unless gnus-newsgroup-processable
(error "No articles have been picked"))
(gnus-summary-limit-to-articles nil)
(when catch-up
(gnus-summary-limit-mark-excluded-as-read))
(gnus-summary-first-unread-article)
(gnus-configure-windows (if gnus-pick-display-summary 'article 'pick) t))
;;;
;;; gnus-binary-mode
;;;
(defvar gnus-binary-mode nil
"Minor mode for provind a binary group interface in Gnus summary buffers.")
(defvar gnus-binary-mode-hook nil
"Hook run in summary binary mode buffers.")
(defvar gnus-binary-mode-map nil)
(unless gnus-binary-mode-map
(setq gnus-binary-mode-map (make-sparse-keymap))
(gnus-define-keys
gnus-binary-mode-map
"g" gnus-binary-show-article))
(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]))))
(defun gnus-binary-mode (&optional arg)
"Minor mode for providing a binary group interface in Gnus summary buffers."
(interactive "P")
(when (eq major-mode 'gnus-summary-mode)
(make-local-variable 'gnus-binary-mode)
(setq gnus-binary-mode
(if (null arg) (not gnus-binary-mode)
(> (prefix-numeric-value arg) 0)))
(when 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 (and menu-bar-mode
(gnus-visual-p 'binary-menu 'menu))
(gnus-binary-make-menu-bar))
(unless (assq 'gnus-binary-mode minor-mode-alist)
(push '(gnus-binary-mode " Binary") minor-mode-alist))
(unless (assq 'gnus-binary-mode minor-mode-map-alist)
(push (cons 'gnus-binary-mode gnus-binary-mode-map)
minor-mode-map-alist))
(run-hooks 'gnus-binary-mode-hook))))
(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 '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
;;;
(defvar gnus-tree-line-format "%(%[%3,3n%]%)"
"Format of tree elements.")
(defvar 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.")
(defvar gnus-selected-tree-face 'modeline
"*Face used for highlighting selected articles in the thread tree.")
(defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
(?\{ . ?\}) (?< . ?>))
"Brackets used in tree nodes.")
(defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
"Charaters used to connect parents with children.")
(defvar gnus-tree-mode-line-format "Gnus: %%b %S %Z"
"*The format specification for the tree mode line.")
(defvar 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'.")
(defvar gnus-tree-mode-hook nil
"*Hook run in tree mode buffers.")
;;; Internal variables.
(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-mode-map nil)
(put 'gnus-tree-mode 'mode-class 'special)
(unless gnus-tree-mode-map
(setq gnus-tree-mode-map (make-keymap))
(suppress-keymap gnus-tree-mode-map)
(gnus-define-keys
gnus-tree-mode-map
"\r" gnus-tree-select-article
gnus-mouse-2 gnus-tree-pick-article
"\C-?" gnus-tree-read-summary-keys
"\C-c\C-i" gnus-info-find-node)
(substitute-key-definition
'undefined 'gnus-tree-read-summary-keys gnus-tree-mode-map))
(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]))))
(defun gnus-tree-mode ()
"Major mode for displaying thread trees."
(interactive)
(setq gnus-tree-mode-line-format-spec
(gnus-parse-format gnus-tree-mode-line-format
gnus-summary-mode-line-format-alist))
(setq gnus-tree-line-format-spec
(gnus-parse-format gnus-tree-line-format
gnus-tree-line-format-alist t))
(when (and menu-bar-mode
(gnus-visual-p 'tree-menu 'menu))
(gnus-tree-make-menu-bar))
(kill-all-local-variables)
(gnus-simplify-mode-line)
(setq mode-name "Tree")
(setq major-mode 'gnus-tree-mode)
(use-local-map gnus-tree-mode-map)
(buffer-disable-undo (current-buffer))
(setq buffer-read-only t)
(setq truncate-lines t)
(save-excursion
(gnus-set-work-buffer)
(gnus-tree-node-insert (make-mail-header "") nil)
(setq gnus-tree-node-length (1- (point))))
(run-hooks 'gnus-tree-mode-hook))
(defun gnus-tree-read-summary-keys (&optional arg)
"Read a summary buffer key sequence and execute it."
(interactive "P")
(let ((buf (current-buffer))
win)
(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-select-article (article)
"Select the article under point, if any."
(interactive (list (gnus-tree-article-number)))
(let ((buf (current-buffer)))
(when article
(save-excursion
(set-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-goto-article (article)
(let ((pos (text-property-any (point-min) (point-max) 'gnus-number article)))
(when pos
(goto-char pos))))
(defun gnus-tree-recenter ()
"Center point in the tree window."
(let ((selected (selected-window))
(tree-window (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."
(save-excursion
(set-buffer (get-buffer-create gnus-tree-buffer))
(unless (eq major-mode 'gnus-tree-mode)
(gnus-add-current-to-buffer-list)
(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)))
(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))))
(defun gnus-tree-highlight-node (article beg end)
"Highlight current line according to `gnus-summary-highlight'."
(let ((list gnus-summary-highlight)
face)
(save-excursion
(set-buffer gnus-summary-buffer)
(let* ((score (or (cdr (assq article gnus-newsgroup-scored))
gnus-summary-default-score 0))
(default gnus-summary-default-score)
(mark (or (gnus-summary-article-mark article) gnus-unread-mark)))
;; Eval the cars of the lists until we find a match.
(while (and list
(not (eval (caar list))))
(setq list (cdr list)))))
(unless (eq (setq face (cdar list)) (get-text-property beg 'face))
(gnus-put-text-property
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."
(save-excursion
(set-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 (get-buffer-window (set-buffer gnus-tree-buffer) t)
(select-window (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
(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)) (gnus-point-at-bol) 1))
;; Draw "|" lines upwards.
(while (progn
(forward-line -1)
(forward-char col)
(= (following-char) ? ))
(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) (gnus-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
(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))
;; Draw "-" lines leftwards.
(while (progn
(forward-char -2)
(= (following-char) ? ))
(delete-char 1)
(insert (car gnus-tree-parent-child-edges)))
(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 (save-excursion
(set-buffer gnus-summary-buffer)
(and gnus-use-trees
(vectorp (gnus-summary-article-header article))))
(save-excursion
(let ((top (save-excursion
(set-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 (group)
(gnus-get-tree-buffer))
(defun gnus-tree-close (group)
;(gnus-kill-buffer gnus-tree-buffer)
)
(defun gnus-highlight-selected-tree (article)
"Highlight the selected article in the tree."
(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 1 2))
'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 (get-buffer-window (set-buffer gnus-tree-buffer) t)
(select-window (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?!?
(save-excursion
(set-buffer gnus-tree-buffer)
(gnus-set-mode-line 'tree))
(set-buffer buf)))
(defun gnus-tree-highlight-article (article face)
(save-excursion
(set-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
(get-buffer-window (current-buffer) t) (cdr region))))))
;;; Allow redefinition of functions.
(gnus-ems-redefine)
(provide 'gnus-salt)
;;; gnus-salt.el ends here