852 lines
29 KiB
EmacsLisp
852 lines
29 KiB
EmacsLisp
;;; gnus-salt.el --- alternate summary mode interfaces for Gnus -*- lexical-binding: t; -*-
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;; Copyright (C) 1996-1999, 2001-2024 Free Software Foundation, Inc.
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;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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;; Keywords: news
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(eval-when-compile (require 'cl-lib))
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(require 'gnus)
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(require 'gnus-sum)
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(require 'gnus-win)
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;;;
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;;; gnus-pick-mode
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;;;
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(defcustom gnus-pick-display-summary nil
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"Display summary while reading."
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:type 'boolean
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:group 'gnus-summary-pick)
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(defcustom gnus-pick-mode-hook nil
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"Hook run in summary pick mode buffers."
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:type 'hook
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:group 'gnus-summary-pick)
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(defcustom gnus-mark-unpicked-articles-as-read nil
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"If non-nil, mark all unpicked articles as read."
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:type 'boolean
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:group 'gnus-summary-pick)
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(defcustom gnus-pick-elegant-flow t
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"If non-nil, `gnus-pick-start-reading' runs
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`gnus-summary-next-group' when no articles have been picked."
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:type 'boolean
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:group 'gnus-summary-pick)
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(defcustom gnus-summary-pick-line-format
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"%-5P %U\ %R\ %z\ %I\ %(%[%4L: %-23,23n%]%) %s\n"
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"The format specification of the lines in pick buffers.
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It accepts the same format specs that `gnus-summary-line-format' does."
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:type 'string
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:group 'gnus-summary-pick)
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;;; Internal variables.
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(defvar-keymap gnus-pick-mode-map
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"SPC" #'gnus-pick-next-page
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"u" #'gnus-pick-unmark-article-or-thread
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"." #'gnus-pick-article-or-thread
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"<down-mouse-2>" #'gnus-pick-mouse-pick-region
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"RET" #'gnus-pick-start-reading)
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(defun gnus-pick-make-menu-bar ()
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(unless (boundp 'gnus-pick-menu)
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(easy-menu-define
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gnus-pick-menu gnus-pick-mode-map ""
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'("Pick"
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("Pick"
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["Article" gnus-summary-mark-as-processable t]
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["Thread" gnus-uu-mark-thread t]
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["Region" gnus-uu-mark-region t]
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["Regexp" gnus-uu-mark-by-regexp t]
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["Buffer" gnus-uu-mark-buffer t])
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("Unpick"
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["Article" gnus-summary-unmark-as-processable t]
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["Thread" gnus-uu-unmark-thread t]
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["Region" gnus-uu-unmark-region t]
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["Regexp" gnus-uu-unmark-by-regexp t]
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["Buffer" gnus-summary-unmark-all-processable t])
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["Start reading" gnus-pick-start-reading t]
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["Switch pick mode off" gnus-pick-mode gnus-pick-mode]))))
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(define-minor-mode gnus-pick-mode
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"Minor mode for providing a pick-and-read interface in Gnus summary buffers.
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\\{gnus-pick-mode-map}"
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:lighter " Pick" :keymap gnus-pick-mode-map
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(cond
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((not (derived-mode-p 'gnus-summary-mode)) (setq gnus-pick-mode nil))
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((not gnus-pick-mode)
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;; FIXME: a buffer-local minor mode removing globally from a hook??
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(remove-hook 'gnus-message-setup-hook #'gnus-pick-setup-message))
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(t
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;; Make sure that we don't select any articles upon group entry.
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(setq-local gnus-auto-select-first nil)
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;; Change line format.
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(setq gnus-summary-line-format gnus-summary-pick-line-format)
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(setq gnus-summary-line-format-spec nil)
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(gnus-update-format-specifications nil 'summary)
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(gnus-update-summary-mark-positions)
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;; FIXME: a buffer-local minor mode adding globally to a hook??
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(add-hook 'gnus-message-setup-hook #'gnus-pick-setup-message)
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(setq-local gnus-summary-goto-unread 'never)
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;; Set up the menu.
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(when (gnus-visual-p 'pick-menu 'menu)
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(gnus-pick-make-menu-bar)))))
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(defun gnus-pick-setup-message ()
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"Make Message do the right thing on exit."
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(when (and (gnus-buffer-live-p gnus-summary-buffer)
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(with-current-buffer gnus-summary-buffer
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gnus-pick-mode))
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(message-add-action
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`(gnus-configure-windows ,gnus-current-window-configuration t)
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'send 'exit 'postpone 'kill)))
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(defvar gnus-pick-line-number 1)
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(defun gnus-pick-line-number ()
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"Return the current line number."
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(cl-incf gnus-pick-line-number))
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(defun gnus-pick-start-reading (&optional catch-up)
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"Start reading the picked articles.
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If given a prefix, mark all unpicked articles as read."
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(interactive "P" gnus-pick-mode)
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(if gnus-newsgroup-processable
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(progn
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(gnus-summary-limit-to-articles nil)
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(when (or catch-up gnus-mark-unpicked-articles-as-read)
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(gnus-summary-limit-mark-excluded-as-read))
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(gnus-summary-first-article)
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(gnus-configure-windows
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(if gnus-pick-display-summary 'article 'pick) t))
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(if gnus-pick-elegant-flow
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(progn
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(when (or catch-up gnus-mark-unpicked-articles-as-read)
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(gnus-summary-catchup nil t))
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(if (gnus-group-quit-config gnus-newsgroup-name)
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(gnus-summary-exit)
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(gnus-summary-next-group)))
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(error "No articles have been picked"))))
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(defun gnus-pick-goto-article (arg)
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"Go to the article number indicated by ARG.
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If ARG is an invalid article number, then stay on current line."
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(let (pos)
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(save-excursion
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(goto-char (point-min))
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(when (zerop (forward-line (1- (prefix-numeric-value arg))))
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(setq pos (point))))
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(if (not pos)
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(gnus-error 2 "No such line: %s" arg)
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(goto-char pos))))
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(defun gnus-pick-article (&optional arg)
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"Pick the article on the current line.
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If ARG, pick the article on that line instead."
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(interactive "P")
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(when arg
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(gnus-pick-goto-article arg))
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(gnus-summary-mark-as-processable 1))
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(defun gnus-pick-article-or-thread (&optional arg)
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"If `gnus-thread-hide-subtree' is t, then pick the thread on the current line.
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Otherwise pick the article on the current line.
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If ARG, pick the article/thread on that line instead."
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(interactive "P")
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(when arg
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(gnus-pick-goto-article arg))
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(if gnus-thread-hide-subtree
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(progn
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(save-excursion
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(gnus-uu-mark-thread))
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(forward-line 1))
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(gnus-summary-mark-as-processable 1)))
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(defun gnus-pick-unmark-article-or-thread (&optional arg)
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"If `gnus-thread-hide-subtree' is t, then unmark the thread on current line.
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Otherwise unmark the article on current line.
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If ARG, unmark thread/article on that line instead."
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(interactive "P")
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(when arg
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(gnus-pick-goto-article arg))
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(if gnus-thread-hide-subtree
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(save-excursion
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(gnus-uu-unmark-thread))
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(gnus-summary-unmark-as-processable 1)))
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(defun gnus-pick-mouse-pick (e)
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(interactive "e")
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(mouse-set-point e)
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(save-excursion
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(gnus-summary-mark-as-processable 1)))
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(defun gnus-pick-mouse-pick-region (start-event)
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"Pick articles that the mouse is dragged over.
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This must be bound to a button-down mouse event."
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(interactive "e")
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(mouse-minibuffer-check start-event)
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(let* ((echo-keystrokes 0)
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(start-posn (event-start start-event))
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(start-point (posn-point start-posn))
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(start-line (1+ (count-lines (point-min) start-point)))
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(start-window (posn-window start-posn))
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(bounds (window-edges start-window))
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(top (nth 1 bounds))
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(bottom (if (window-minibuffer-p start-window)
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(nth 3 bounds)
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;; Don't count the mode line.
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(1- (nth 3 bounds))))
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(click-count (1- (event-click-count start-event))))
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(setq mouse-selection-click-count click-count)
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(setq mouse-selection-click-count-buffer (current-buffer))
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(mouse-set-point start-event)
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;; In case the down click is in the middle of some intangible text,
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;; use the end of that text, and put it in START-POINT.
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(when (< (point) start-point)
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(goto-char start-point))
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(gnus-pick-article)
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(setq start-point (point))
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;; end-of-range is used only in the single-click case.
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;; It is the place where the drag has reached so far
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;; (but not outside the window where the drag started).
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(let (event end end-point (end-of-range (point)))
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(track-mouse
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(while (progn
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(setq event (cdr (gnus-read-event-char)))
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(or (mouse-movement-p event)
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(eq (car-safe event) 'switch-frame)))
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(if (eq (car-safe event) 'switch-frame)
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nil
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(setq end (event-end event)
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end-point (posn-point end))
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(cond
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;; Are we moving within the original window?
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((and (eq (posn-window end) start-window)
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(integer-or-marker-p end-point))
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;; Go to START-POINT first, so that when we move to END-POINT,
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;; if it's in the middle of intangible text,
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;; point jumps in the direction away from START-POINT.
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(goto-char start-point)
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(goto-char end-point)
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(gnus-pick-article)
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;; In case the user moved his mouse really fast, pick
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;; articles on the line between this one and the last one.
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(let* ((this-line (1+ (count-lines (point-min) end-point)))
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(min-line (min this-line start-line))
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(max-line (max this-line start-line)))
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(while (< min-line max-line)
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(goto-char (point-min))
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(forward-line (1- min-line))
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(gnus-pick-article)
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(setq min-line (1+ min-line)))
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(setq start-line this-line))
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(when (zerop (% click-count 3))
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(setq end-of-range (point))))
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(t
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(let ((mouse-row (cdr (cdr (mouse-position)))))
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(cond
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((null mouse-row))
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((< mouse-row top)
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(mouse-scroll-subr start-window (- mouse-row top)))
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((>= mouse-row bottom)
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(mouse-scroll-subr start-window
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(1+ (- mouse-row bottom)))))))))))
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(when (consp event)
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(let (;; (fun (key-binding (vector (car event))))
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)
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;; Run the binding of the terminating up-event, if possible.
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;; In the case of a multiple click, it gives the wrong results,
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;; because it would fail to set up a region.
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(when nil
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;; (and (= (mod mouse-selection-click-count 3) 0) (fboundp fun))
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;; In this case, we can just let the up-event execute normally.
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(let ((end (event-end event)))
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;; Set the position in the event before we replay it,
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;; because otherwise it may have a position in the wrong
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;; buffer.
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(setcar (cdr end) end-of-range)
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;; Delete the overlay before calling the function,
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;; because delete-overlay increases buffer-modified-tick.
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(push event unread-command-events))))))))
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(defvar scroll-in-place)
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(defun gnus-pick-next-page ()
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"Go to the next page. If at the end of the buffer, start reading articles."
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(interactive)
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(let ((scroll-in-place nil))
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(condition-case nil
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(scroll-up)
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(end-of-buffer (gnus-pick-start-reading)))))
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;;;
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;;; gnus-binary-mode
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;;;
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(defvar gnus-binary-mode-hook nil
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"Hook run in summary binary mode buffers.")
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(defvar-keymap gnus-binary-mode-map
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"g" #'gnus-binary-show-article)
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(defun gnus-binary-make-menu-bar ()
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(unless (boundp 'gnus-binary-menu)
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(easy-menu-define
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gnus-binary-menu gnus-binary-mode-map ""
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'("Pick"
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["Switch binary mode off" gnus-binary-mode t]))))
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(define-minor-mode gnus-binary-mode
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"Minor mode for providing a binary group interface in Gnus summary buffers."
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:lighter " Binary" :keymap gnus-binary-mode-map
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(cond
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((not (derived-mode-p 'gnus-summary-mode)) (setq gnus-binary-mode nil))
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(gnus-binary-mode
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;; Make sure that we don't select any articles upon group entry.
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(setq-local gnus-auto-select-first nil)
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(setq-local gnus-summary-display-article-function 'gnus-binary-display-article)
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;; Set up the menu.
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(when (gnus-visual-p 'binary-menu 'menu)
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(gnus-binary-make-menu-bar)))))
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(defun gnus-binary-display-article (article &optional _all-header)
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"Run ARTICLE through the binary decode functions."
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(when (gnus-summary-goto-subject article)
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(let ((gnus-view-pseudos (or gnus-view-pseudos 'automatic)))
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(gnus-uu-decode-uu))))
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(defun gnus-binary-show-article (&optional arg)
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"Bypass the binary functions and show the article."
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(interactive "P")
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(let (gnus-summary-display-article-function)
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(gnus-summary-show-article arg)))
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;;;
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;;; gnus-tree-mode
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;;;
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(defcustom gnus-tree-line-format "%(%[%3,3n%]%)"
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"Format of tree elements."
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:type 'string
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:group 'gnus-summary-tree)
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(defcustom gnus-tree-minimize-window t
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"If non-nil, minimize the tree buffer window.
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If a number, never let the tree buffer grow taller than that number of
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lines."
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:type '(choice boolean
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integer)
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:group 'gnus-summary-tree)
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(defcustom gnus-selected-tree-face 'mode-line
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"Face used for highlighting selected articles in the thread tree."
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:type 'face
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:group 'gnus-summary-tree)
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(defvar gnus-tree-brackets '((?\[ . ?\]) (?\( . ?\))
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(?\{ . ?\}) (?< . ?>))
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"Brackets used in tree nodes.")
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(defvar gnus-tree-parent-child-edges '(?- ?\\ ?|)
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"Characters used to connect parents with children.")
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(defcustom gnus-tree-mode-line-format "Gnus: %%b %S %Z"
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"The format specification for the tree mode line."
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:type 'string
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:group 'gnus-summary-tree)
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(defcustom gnus-generate-tree-function 'gnus-generate-vertical-tree
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"Function for generating a thread tree.
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Two predefined functions are available:
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`gnus-generate-horizontal-tree' and `gnus-generate-vertical-tree'."
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:type '(radio (function-item gnus-generate-vertical-tree)
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(function-item gnus-generate-horizontal-tree)
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(function :tag "Other" nil))
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:group 'gnus-summary-tree)
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;;; Internal variables.
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(defvar gnus-tmp-name)
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(defvar gnus-tmp-from)
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(defvar gnus-tmp-number)
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(defvar gnus-tmp-open-bracket)
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(defvar gnus-tmp-close-bracket)
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(defvar gnus-tmp-subject)
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(defvar gnus-tree-line-format-alist
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'((?n gnus-tmp-name ?s)
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(?f gnus-tmp-from ?s)
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(?N gnus-tmp-number ?d)
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(?\[ gnus-tmp-open-bracket ?c)
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(?\] gnus-tmp-close-bracket ?c)
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(?s gnus-tmp-subject ?s)))
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(defvar gnus-tree-mode-line-format-alist gnus-summary-mode-line-format-alist)
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(defvar gnus-tree-mode-line-format-spec nil)
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(defvar gnus-tree-line-format-spec nil)
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(defvar gnus-tree-node-length nil)
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(defvar gnus-selected-tree-overlay nil)
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(defvar gnus-tree-displayed-thread nil)
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(defvar gnus-tree-inhibit nil)
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(defvar-keymap gnus-tree-mode-map
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:full t :suppress t
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"RET" #'gnus-tree-select-article
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"<mouse-2>" #'gnus-tree-pick-article
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"DEL" #'gnus-tree-read-summary-keys
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"h" #'gnus-tree-show-summary
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"C-c C-i" #'gnus-info-find-node)
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(substitute-key-definition 'undefined #'gnus-tree-read-summary-keys
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gnus-tree-mode-map)
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(defun gnus-tree-make-menu-bar ()
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(unless (boundp 'gnus-tree-menu)
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(easy-menu-define
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gnus-tree-menu gnus-tree-mode-map ""
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'("Tree"
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["Select article" gnus-tree-select-article t]))))
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(define-derived-mode gnus-tree-mode gnus-mode "Tree"
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"Major mode for displaying thread trees."
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(gnus-set-format 'tree-mode)
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(gnus-set-format 'tree t)
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(when (gnus-visual-p 'tree-menu 'menu)
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(gnus-tree-make-menu-bar))
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(gnus-simplify-mode-line)
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(buffer-disable-undo)
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(setq buffer-read-only t)
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(setq truncate-lines t)
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(save-current-buffer
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(gnus-set-work-buffer)
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(gnus-tree-node-insert (make-mail-header "") nil)
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(setq gnus-tree-node-length (1- (point)))))
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(defun gnus-tree-read-summary-keys (&optional arg)
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"Read a summary buffer key sequence and execute it."
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(interactive "P" gnus-tree-mode)
|
|
(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 (overlay-end gnus-selected-tree-overlay) 1)))
|
|
(gnus-tree-minimize)))))
|
|
|
|
(defun gnus-tree-show-summary ()
|
|
"Reconfigure windows to show summary buffer."
|
|
(interactive nil gnus-tree-mode)
|
|
(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)) gnus-tree-mode)
|
|
(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" gnus-tree-mode)
|
|
(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 (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) (cl-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 "*****"))
|
|
(setf (mail-header-number header) 0)
|
|
(setf (mail-header-lines header) 0)
|
|
(setf (mail-header-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)
|
|
(add-text-properties
|
|
(setq beg (point))
|
|
(setq end (progn (eval gnus-tree-line-format-spec t) (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)) (line-beginning-position) 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) (line-beginning-position)))))
|
|
(when (> len 0)
|
|
(insert (make-string len ? )))))
|
|
|
|
(defsubst gnus-tree-forward-line (n)
|
|
(while (>= (cl-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)
|
|
(cl-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 (not gnus-selected-tree-overlay)
|
|
;; Create a new overlay.
|
|
(overlay-put
|
|
(setq gnus-selected-tree-overlay
|
|
(make-overlay (point-min) (1+ (point-min))))
|
|
'face gnus-selected-tree-face))
|
|
;; Move the overlay to the article.
|
|
(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))
|
|
(put-text-property (car region) (cdr region) 'face face)
|
|
(set-window-point
|
|
(gnus-get-buffer-window (current-buffer) t) (cdr region)))))))
|
|
|
|
(provide 'gnus-salt)
|
|
|
|
;;; gnus-salt.el ends here
|