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https://git.savannah.gnu.org/git/emacs.git
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1545 lines
53 KiB
EmacsLisp
1545 lines
53 KiB
EmacsLisp
;;; gnus-util.el --- utility functions for Gnus -*- lexical-binding: t; -*-
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;; Copyright (C) 1996-2024 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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;; Nothing in this file depends on any other parts of Gnus -- all
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;; functions and macros in this file are utility functions that are
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;; used by Gnus and may be used by any other package without loading
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;; Gnus first.
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;; [Unfortunately, it does depend on other parts of Gnus, e.g. the
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;; autoloads and defvars below...]
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;;; Code:
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(eval-when-compile (require 'cl-lib))
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(require 'seq)
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(require 'time-date)
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(require 'text-property-search)
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(defcustom gnus-completing-read-function 'gnus-emacs-completing-read
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"Function use to do completing read."
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:version "29.1"
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:group 'gnus-meta
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:type '(radio (function-item
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:doc "Use Emacs standard `completing-read' function."
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gnus-emacs-completing-read)
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(function-item
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:doc "Use `ido-completing-read' function."
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gnus-ido-completing-read)))
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(defcustom gnus-completion-styles
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(append (when (and (assq 'substring completion-styles-alist)
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(not (memq 'substring completion-styles)))
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(list 'substring))
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completion-styles)
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"Value of `completion-styles' to use when completing."
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:version "24.1"
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:group 'gnus-meta
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:type '(repeat symbol))
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;; Fixme: this should be a gnus variable, not nnmail-.
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(defvar nnmail-pathname-coding-system)
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(defvar nnmail-active-file-coding-system)
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;; Inappropriate references to other parts of Gnus.
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(defvar gnus-emphasize-whitespace-regexp)
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(defvar gnus-original-article-buffer)
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(defvar gnus-user-agent)
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(autoload 'gnus-get-buffer-window "gnus-win")
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(autoload 'nnheader-narrow-to-headers "nnheader")
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(autoload 'nnheader-replace-chars-in-string "nnheader")
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(autoload 'mail-header-remove-comments "mail-parse")
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(defun gnus-replace-in-string (string regexp newtext &optional literal)
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"Replace all matches for REGEXP with NEWTEXT in STRING.
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If LITERAL is non-nil, insert NEWTEXT literally. Return a new
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string containing the replacements.
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This is a compatibility function for different Emacsen."
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(declare (obsolete replace-regexp-in-string "26.1"))
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(replace-regexp-in-string regexp newtext string nil literal))
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(defmacro gnus-eval-in-buffer-window (buffer &rest forms)
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"Pop to BUFFER, evaluate FORMS, and then return to the original window."
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(declare (indent 1) (debug t))
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(let ((tempvar (make-symbol "GnusStartBufferWindow"))
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(w (make-symbol "w"))
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(buf (make-symbol "buf")))
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`(let* ((,tempvar (selected-window))
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(,buf ,buffer)
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(,w (gnus-get-buffer-window ,buf 'visible)))
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(unwind-protect
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(progn
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(if ,w
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(progn
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(select-window ,w)
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(set-buffer (window-buffer ,w)))
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(pop-to-buffer ,buf))
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,@forms)
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(select-window ,tempvar)))))
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(defsubst gnus-goto-char (point)
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(and point (goto-char point)))
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(defun gnus-delete-first (elt list)
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"Delete by side effect the first occurrence of ELT as a member of LIST."
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(if (equal (car list) elt)
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(cdr list)
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(let ((total list))
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(while (and (cdr list)
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(not (equal (cadr list) elt)))
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(setq list (cdr list)))
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(when (cdr list)
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(setcdr list (cddr list)))
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total)))
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;; Delete the current line (and the next N lines).
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(defmacro gnus-delete-line (&optional n)
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`(delete-region (line-beginning-position)
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(progn (forward-line ,(or n 1)) (point))))
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(defun gnus-extract-address-components (from)
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"Extract address components from a From header.
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Given an RFC-822 (or later) address FROM, extract name and address.
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Returns a list of the form (FULL-NAME CANONICAL-ADDRESS). Much more simple
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solution than `mail-header-parse-address', which works much better, but
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is slower."
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(let (name address)
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;; First find the address - the thing with the @ in it. This may
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;; not be accurate in mail addresses, but does the trick most of
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;; the time in news messages.
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(cond (;; Check ``<foo@bar>'' first in order to handle the quite common
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;; form ``"abc@xyz" <foo@bar>'' (i.e. ``@'' as part of a comment)
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;; correctly.
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(string-match "<\\([^@ \t<>]+[!@][^@ \t<>]+\\)>" from)
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(setq address (substring from (match-beginning 1) (match-end 1))))
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((string-match "\\b[^@ \t<>]+[!@][^@ \t<>]+\\b" from)
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(setq address (substring from (match-beginning 0) (match-end 0)))))
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;; Then we check whether the "name <address>" format is used.
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(and address
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;; Linear white space is not required.
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(string-match (concat "[ \t]*<" (regexp-quote address) ">") from)
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(and (setq name (substring from 0 (match-beginning 0)))
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;; Strip any quotes from the name.
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(string-match "^\".*\"$" name)
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(setq name (substring name 1 (1- (match-end 0))))))
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;; If not, then "address (name)" is used.
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(or name
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(and (string-match "(.+)" from)
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(setq name (substring from (1+ (match-beginning 0))
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(1- (match-end 0)))))
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(and (string-search "()" from)
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(setq name address))
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;; XOVER might not support folded From headers.
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(and (string-match "(.*" from)
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(setq name (substring from (1+ (match-beginning 0))
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(match-end 0)))))
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(list (if (string= name "") nil name) (or address from))))
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(declare-function message-fetch-field "message" (header &optional not-all))
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(defun gnus-fetch-field (field)
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"Return the value of the header FIELD of current article."
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(require 'message)
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(save-excursion
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(save-restriction
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(nnheader-narrow-to-headers)
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(message-fetch-field field))))
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(defun gnus-fetch-original-field (field)
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"Fetch FIELD from the original version of the current article."
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(with-current-buffer gnus-original-article-buffer
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(gnus-fetch-field field)))
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(defun gnus-goto-colon ()
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(move-beginning-of-line 1)
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(let ((eol (line-end-position)))
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(goto-char (or (text-property-any (point) eol 'gnus-position t)
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(search-forward ":" eol t)
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(point)))))
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(defun gnus-text-property-search (prop value &optional forward-only goto end)
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"Search current buffer for text property PROP with VALUE.
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Behaves like a combination of `text-property-any' and
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`text-property-search-forward'. Searches for the beginning of a
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text property `equal' to VALUE. Returns the value of point at
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the beginning of the matching text property span.
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If FORWARD-ONLY is non-nil, only search forward from point.
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If GOTO is non-nil, move point to the beginning of that span
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instead.
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If END is non-nil, use the end of the span instead."
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(let* ((start (point))
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(found (progn
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(unless forward-only
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(goto-char (point-min)))
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(text-property-search-forward
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prop value #'equal)))
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(target (when found
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(if end
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(prop-match-end found)
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(prop-match-beginning found)))))
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(when target
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(if goto
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(goto-char target)
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(prog1
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target
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(goto-char start))))))
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(declare-function gnus-find-method-for-group "gnus" (group &optional info))
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(declare-function gnus-group-name-decode "gnus-group" (string charset))
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(declare-function gnus-group-name-charset "gnus-group" (method group))
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;; gnus-group requires gnus-int which requires message.
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(declare-function message-tokenize-header "message"
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(header &optional separator))
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(defun gnus-decode-newsgroups (newsgroups group &optional method)
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(require 'gnus-group)
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(let ((method (or method (gnus-find-method-for-group group))))
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(mapconcat (lambda (group)
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(gnus-group-name-decode group (gnus-group-name-charset
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method group)))
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(message-tokenize-header newsgroups)
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",")))
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(defun gnus-remove-text-with-property (prop)
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"Delete all text in the current buffer with text property PROP."
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(let ((start (point-min))
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end)
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(unless (get-text-property start prop)
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(setq start (next-single-property-change start prop)))
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(while start
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(setq end (text-property-any start (point-max) prop nil))
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(delete-region start (or end (point-max)))
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(setq start (when end
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(next-single-property-change start prop))))))
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(defun gnus-find-text-property-region (start end prop)
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"Return a list of text property regions that has property PROP."
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(let (regions value)
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(unless (get-text-property start prop)
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(setq start (next-single-property-change start prop)))
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(while start
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(setq value (get-text-property start prop)
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end (text-property-not-all start (point-max) prop value))
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(if (not end)
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(setq start nil)
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(when value
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(push (list (set-marker (make-marker) start)
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(set-marker (make-marker) end)
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value)
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regions))
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(setq start (next-single-property-change start prop))))
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(nreverse regions)))
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(defun gnus-newsgroup-directory-form (newsgroup)
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"Make hierarchical directory name from NEWSGROUP name."
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(let* ((newsgroup (gnus-newsgroup-savable-name newsgroup))
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(idx (string-search ":" newsgroup)))
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(concat
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(if idx (substring newsgroup 0 idx))
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(if idx "/")
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(nnheader-replace-chars-in-string
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(if idx (substring newsgroup (1+ idx)) newsgroup)
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?. ?/))))
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(defun gnus-newsgroup-savable-name (group)
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;; Replace any slashes in a group name (eg. an ange-ftp nndoc group)
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;; with dots.
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(nnheader-replace-chars-in-string group ?/ ?.))
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(defun gnus-string> (s1 s2)
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(not (or (string< s1 s2)
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(string= s1 s2))))
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(defun gnus-string< (s1 s2)
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"Return t if first arg string is less than second in lexicographic order.
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Case is significant if and only if `case-fold-search' is nil.
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Symbols are also allowed; their print names are used instead."
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(if case-fold-search
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(string-lessp (downcase (if (symbolp s1) (symbol-name s1) s1))
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(downcase (if (symbolp s2) (symbol-name s2) s2)))
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(string-lessp s1 s2)))
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;;; Time functions.
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(defun gnus-file-newer-than (file date)
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(time-less-p date (file-attribute-modification-time (file-attributes file))))
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;;; Keymap macros.
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(defmacro gnus-local-set-keys (&rest plist)
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"Set the keys in PLIST in the current keymap."
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(declare (obsolete define-keymap "29.1") (indent 1))
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`(gnus-define-keys-1 (current-local-map) ',plist))
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(defmacro gnus-define-keys (keymap &rest plist)
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"Define all keys in PLIST in KEYMAP."
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(declare (obsolete define-keymap "29.1") (indent 1))
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`(gnus-define-keys-1 ,(if (symbolp keymap) keymap `',keymap) (quote ,plist)))
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(defmacro gnus-define-keys-safe (keymap &rest plist)
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"Define all keys in PLIST in KEYMAP without overwriting previous definitions."
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(declare (obsolete define-keymap "29.1") (indent 1))
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`(gnus-define-keys-1 (quote ,keymap) (quote ,plist) t))
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(defmacro gnus-define-keymap (keymap &rest plist)
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"Define all keys in PLIST in KEYMAP."
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(declare (obsolete define-keymap "29.1") (indent 1))
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`(gnus-define-keys-1 ,keymap (quote ,plist)))
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(defun gnus-define-keys-1 (keymap plist &optional safe)
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(declare (obsolete define-keymap "29.1"))
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(when (null keymap)
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(error "Can't set keys in a null keymap"))
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(cond ((symbolp keymap) (error "First arg should be a keymap object"))
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((keymapp keymap))
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((listp keymap)
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(set (car keymap) nil)
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(define-prefix-command (car keymap))
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(define-key (symbol-value (caddr keymap)) (cadr keymap) (car keymap))
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(setq keymap (symbol-value (car keymap)))))
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(let (key)
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(while plist
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(when (symbolp (setq key (pop plist)))
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(setq key (symbol-value key)))
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(if (or (not safe)
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(eq (lookup-key keymap key) 'undefined))
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(define-key keymap key (pop plist))
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(pop plist)))))
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(defun gnus-y-or-n-p (prompt)
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(prog1
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(y-or-n-p prompt)
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(message "")))
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(defun gnus-yes-or-no-p (prompt)
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(prog1
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(yes-or-no-p prompt)
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(message "")))
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;; By Frank Schmitt <ich@Frank-Schmitt.net>. Enables age-dependent
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;; date representations. (e.g. just the time if it's from today, the
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;; day of the week if it's within the last 7 days and the full date if
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;; it's older)
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(defun gnus-seconds-today ()
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"Return the integer number of seconds passed today."
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(let ((now (decode-time nil nil 'integer)))
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(+ (decoded-time-second now)
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(* (decoded-time-minute now) 60)
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(* (decoded-time-hour now) 3600))))
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(defun gnus-seconds-month ()
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"Return the integer number of seconds passed this month."
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(let ((now (decode-time nil nil 'integer)))
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(+ (decoded-time-second now)
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(* (decoded-time-minute now) 60)
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(* (decoded-time-hour now) 3600)
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(* (- (decoded-time-day now) 1) 3600 24))))
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(defun gnus-seconds-year ()
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"Return the integer number of seconds passed this year."
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(let* ((current (current-time))
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(now (decode-time current nil 'integer))
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(days (format-time-string "%j" current)))
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(+ (decoded-time-second now)
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(* (decoded-time-minute now) 60)
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(* (decoded-time-hour now) 3600)
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(* (- (string-to-number days) 1) 3600 24))))
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(defmacro gnus-date-get-time (date)
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"Convert DATE string to Emacs time.
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Cache the result as a text property stored in DATE."
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;; Either return the cached value...
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`(let ((d ,date))
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(if (equal "" d)
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0
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(or (get-text-property 0 'gnus-time d)
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;; or compute the value...
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(let ((time (safe-date-to-time d)))
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;; and store it back in the string.
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(put-text-property 0 1 'gnus-time time d)
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time)))))
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(defun gnus-dd-mmm (messy-date)
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"Return a string like DD-MMM from a big messy string."
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(condition-case ()
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(format-time-string "%d-%b" (gnus-date-get-time messy-date))
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(error " - ")))
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(defsubst gnus-time-iso8601 (time)
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"Return a string of TIME in YYYYMMDDTHHMMSS format."
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(format-time-string "%Y%m%dT%H%M%S" time))
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(defun gnus-date-iso8601 (date)
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"Convert the DATE to YYYYMMDDTHHMMSS."
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(condition-case ()
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(gnus-time-iso8601 (gnus-date-get-time date))
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(error "")))
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(defun gnus-mode-string-quote (string)
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"Quote all \"%\"'s in STRING."
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(string-replace "%" "%%" string))
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(defsubst gnus-make-hashtable (&optional size)
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"Make a hash table of SIZE, testing on `equal'."
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(make-hash-table :size (or size 300) :test #'equal))
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(defcustom gnus-verbose 6
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"Integer that says how verbose Gnus should be.
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The higher the number, the more messages Gnus will flash to say what
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it's doing. At zero, Gnus will be totally mute; at five, Gnus will
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display most important messages; and at ten, Gnus will keep on
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jabbering all the time."
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:version "24.1"
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:group 'gnus-start
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:type 'integer)
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(defcustom gnus-add-timestamp-to-message nil
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"Non-nil means add timestamps to messages that Gnus issues.
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If it is `log', add timestamps to only the messages that go into
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the \"*Messages*\" buffer. If it is neither nil nor `log', add
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timestamps not only to log messages but also to the ones
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displayed in the echo area."
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:version "23.1" ;; No Gnus
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:group 'gnus-various
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:type '(choice :format "%{%t%}:\n %[Value Menu%] %v"
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(const :tag "Logged messages only" log)
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(sexp :tag "All messages"
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:match (lambda (widget value) value)
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:value t)
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(const :tag "No timestamp" nil)))
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(eval-when-compile
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(defmacro gnus-message-with-timestamp-1 (format-string args)
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(let ((timestamp '(format-time-string "%Y%m%dT%H%M%S.%3N> " time)))
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`(let (str time)
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(cond ((eq gnus-add-timestamp-to-message 'log)
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(setq str (let (message-log-max)
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(apply #'message ,format-string ,args)))
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(when (and message-log-max
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(> message-log-max 0)
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(/= (length str) 0))
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(setq time (current-time))
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|
(with-current-buffer (messages-buffer)
|
|
(goto-char (point-max))
|
|
(let ((inhibit-read-only t))
|
|
(insert ,timestamp str "\n")
|
|
(forward-line (- message-log-max))
|
|
(delete-region (point-min) (point)))
|
|
(goto-char (point-max))))
|
|
str)
|
|
(gnus-add-timestamp-to-message
|
|
(if (or (and (null ,format-string) (null ,args))
|
|
(progn
|
|
(setq str (apply #'format-message ,format-string
|
|
,args))
|
|
(zerop (length str))))
|
|
(prog1
|
|
(and ,format-string str)
|
|
(message nil))
|
|
(setq time (current-time))
|
|
(message "%s" (concat ,timestamp str))
|
|
str))
|
|
(t
|
|
(apply #'message ,format-string ,args)))))))
|
|
|
|
(defvar gnus-action-message-log nil)
|
|
|
|
(defun gnus-message-with-timestamp (format-string &rest args)
|
|
"Display message with timestamp. Arguments are the same as `message'.
|
|
The `gnus-add-timestamp-to-message' variable controls how to add
|
|
timestamp to message."
|
|
(gnus-message-with-timestamp-1 format-string args))
|
|
|
|
(defun gnus-message (level &rest args)
|
|
"If LEVEL is lower than `gnus-verbose' print ARGS using `message'.
|
|
|
|
Guideline for numbers:
|
|
1 - error messages, 3 - non-serious error messages, 5 - messages for things
|
|
that take a long time, 7 - not very important messages on stuff, 9 - messages
|
|
inside loops."
|
|
(if (<= level gnus-verbose)
|
|
(let ((message
|
|
(if gnus-add-timestamp-to-message
|
|
(apply #'gnus-message-with-timestamp args)
|
|
(apply #'message args))))
|
|
(when (and (consp gnus-action-message-log)
|
|
(<= level 3))
|
|
(push message gnus-action-message-log))
|
|
message)
|
|
;; We have to do this format thingy here even if the result isn't
|
|
;; shown - the return value has to be the same as the return value
|
|
;; from `message'.
|
|
(apply #'format-message args)))
|
|
|
|
(defun gnus-final-warning ()
|
|
(when (and (consp gnus-action-message-log)
|
|
(setq gnus-action-message-log
|
|
(delete nil gnus-action-message-log)))
|
|
(message "Warning: %s"
|
|
(mapconcat #'identity gnus-action-message-log "; "))))
|
|
|
|
(defun gnus-error (level &rest args)
|
|
"Beep an error if LEVEL is equal to or less than `gnus-verbose'.
|
|
ARGS are passed to `message'."
|
|
(when (<= (floor level) gnus-verbose)
|
|
(apply #'message args)
|
|
(ding)
|
|
(let (duration)
|
|
(when (and (floatp level)
|
|
(not (zerop (setq duration (* 10 (- level (floor level)))))))
|
|
(sit-for duration))))
|
|
nil)
|
|
|
|
(defun gnus-split-references (references)
|
|
"Return a list of Message-IDs in REFERENCES."
|
|
(let ((beg 0)
|
|
(references (mail-header-remove-comments (or references "")))
|
|
ids)
|
|
(while (string-match "<[^<]+[^< \t]" references beg)
|
|
(push (substring references (match-beginning 0) (setq beg (match-end 0)))
|
|
ids))
|
|
(nreverse ids)))
|
|
|
|
(defun gnus-extract-references (references)
|
|
"Return a list of Message-IDs in REFERENCES (in In-Reply-To
|
|
format), trimmed to only contain the Message-IDs."
|
|
(let ((ids (gnus-split-references references))
|
|
refs)
|
|
(dolist (id ids)
|
|
(when (string-match "<[^<>]+>" id)
|
|
(push (match-string 0 id) refs)))
|
|
refs))
|
|
|
|
(defsubst gnus-parent-id (references &optional n)
|
|
"Return the last Message-ID in REFERENCES.
|
|
If N, return the Nth ancestor instead."
|
|
(when (and references
|
|
(not (zerop (length references))))
|
|
(if n
|
|
(let ((ids (inline (gnus-split-references references))))
|
|
(while (nthcdr n ids)
|
|
(setq ids (cdr ids)))
|
|
(car ids))
|
|
(let ((references (mail-header-remove-comments references)))
|
|
(when (string-match "\\(<[^<]+>\\)[ \t]*\\'" references)
|
|
(match-string 1 references))))))
|
|
|
|
(defsubst gnus-buffer-live-p (buffer)
|
|
"If BUFFER names a live buffer, return its object; else nil."
|
|
(and buffer (buffer-live-p (setq buffer (get-buffer buffer)))
|
|
buffer))
|
|
|
|
(define-obsolete-function-alias 'gnus-buffer-exists-p
|
|
#'gnus-buffer-live-p "27.1")
|
|
|
|
(defun gnus-horizontal-recenter ()
|
|
"Recenter the current buffer horizontally."
|
|
(if (< (current-column) (/ (window-width) 2))
|
|
(set-window-hscroll (gnus-get-buffer-window (current-buffer) t) 0)
|
|
(let* ((orig (point))
|
|
(end (window-end (gnus-get-buffer-window (current-buffer) t)))
|
|
(max 0))
|
|
(when end
|
|
;; Find the longest line currently displayed in the window.
|
|
(goto-char (window-start))
|
|
(while (and (not (eobp))
|
|
(< (point) end))
|
|
(end-of-line)
|
|
(setq max (max max (current-column)))
|
|
(forward-line 1))
|
|
(goto-char orig)
|
|
;; Scroll horizontally to center (sort of) the point.
|
|
(if (> max (window-width))
|
|
(set-window-hscroll
|
|
(gnus-get-buffer-window (current-buffer) t)
|
|
(min (- (current-column) (/ (window-width) 3))
|
|
(+ 2 (- max (window-width)))))
|
|
(set-window-hscroll (gnus-get-buffer-window (current-buffer) t) 0))
|
|
max))))
|
|
|
|
(defun gnus-read-event-char (&optional prompt)
|
|
"Get the next event."
|
|
(let ((event (read-event prompt)))
|
|
(cons (and (numberp event) event) event)))
|
|
|
|
(defun gnus-copy-file (file &optional to)
|
|
"Copy FILE to TO."
|
|
(interactive
|
|
(list (read-file-name "Copy file: " default-directory)
|
|
(read-file-name "Copy file to: " default-directory)))
|
|
(unless to
|
|
(setq to (read-file-name "Copy file to: " default-directory)))
|
|
(copy-file file to))
|
|
|
|
(defvar gnus-work-buffer " *gnus work*")
|
|
|
|
(declare-function gnus-get-buffer-create "gnus" (name))
|
|
;; gnus.el requires mm-util.
|
|
(declare-function mm-enable-multibyte "mm-util")
|
|
|
|
(defun gnus-set-work-buffer ()
|
|
"Put point in the empty Gnus work buffer."
|
|
(if (get-buffer gnus-work-buffer)
|
|
(progn
|
|
(set-buffer gnus-work-buffer)
|
|
(erase-buffer))
|
|
(set-buffer (gnus-get-buffer-create gnus-work-buffer))
|
|
(kill-all-local-variables)
|
|
(mm-enable-multibyte)))
|
|
|
|
(defmacro gnus-group-real-name (group)
|
|
"Find the real name of a foreign newsgroup."
|
|
`(let ((gname ,group))
|
|
(if (string-match "^[^:]+:" gname)
|
|
(substring gname (match-end 0))
|
|
gname)))
|
|
|
|
(defmacro gnus-group-server (group)
|
|
"Find the server name of a foreign newsgroup.
|
|
For example, (gnus-group-server \"nnimap+yxa:INBOX.foo\") would
|
|
yield \"nnimap:yxa\"."
|
|
`(let ((gname ,group))
|
|
(if (string-match "^\\([^:+]+\\)\\(?:\\+\\([^:]*\\)\\)?:" gname)
|
|
(format "%s:%s" (match-string 1 gname) (or
|
|
(match-string 2 gname)
|
|
""))
|
|
(format "%s:%s" (car gnus-select-method) (cadr gnus-select-method)))))
|
|
|
|
(defun gnus-make-sort-function (funs)
|
|
"Return a composite sort condition based on the functions in FUNS."
|
|
(cond
|
|
;; Just a simple function.
|
|
((functionp funs) funs)
|
|
;; No functions at all.
|
|
((null funs) funs)
|
|
;; A list of functions.
|
|
((or (cdr funs)
|
|
(listp (car funs)))
|
|
(gnus-byte-compile
|
|
`(lambda (t1 t2)
|
|
,(gnus-make-sort-function-1 (reverse funs)))))
|
|
;; A list containing just one function.
|
|
(t
|
|
(car funs))))
|
|
|
|
(defun gnus-make-sort-function-1 (funs)
|
|
"Return a composite sort condition based on the functions in FUNS."
|
|
(let ((function (car funs))
|
|
(first 't1)
|
|
(last 't2))
|
|
(when (consp function)
|
|
(cond
|
|
;; Reversed spec.
|
|
((eq (car function) 'not)
|
|
(setq function (cadr function)
|
|
first 't2
|
|
last 't1))
|
|
((functionp function)
|
|
;; Do nothing.
|
|
)
|
|
(t
|
|
(error "Invalid sort spec: %s" function))))
|
|
(if (cdr funs)
|
|
`(or (,function ,first ,last)
|
|
(and (not (,function ,last ,first))
|
|
,(gnus-make-sort-function-1 (cdr funs))))
|
|
`(,function ,first ,last))))
|
|
|
|
(defun gnus-turn-off-edit-menu (type)
|
|
"Turn off edit menu in `gnus-TYPE-mode-map'."
|
|
(define-key (symbol-value (intern (format "gnus-%s-mode-map" type)))
|
|
[menu-bar edit] #'undefined))
|
|
|
|
(defvar print-string-length)
|
|
|
|
(defmacro gnus-bind-print-variables (&rest forms)
|
|
"Bind print-* variables and evaluate FORMS.
|
|
This macro is used with `prin1', `pp', etc. in order to ensure
|
|
printed Lisp objects are loadable. Bind `print-quoted' to t, and
|
|
`print-escape-multibyte', `print-escape-newlines',
|
|
`print-escape-nonascii', `print-length', `print-level' and
|
|
`print-string-length' to nil."
|
|
`(let ((print-quoted t)
|
|
;;print-circle
|
|
;;print-continuous-numbering
|
|
print-escape-multibyte
|
|
print-escape-newlines
|
|
print-escape-nonascii
|
|
;;print-gensym
|
|
print-length
|
|
print-level
|
|
print-string-length)
|
|
,@forms))
|
|
|
|
(defun gnus-prin1 (form)
|
|
"Use `prin1' on FORM in the current buffer.
|
|
Bind `print-quoted' to t, and `print-length' and `print-level' to
|
|
nil. See also `gnus-bind-print-variables'."
|
|
(gnus-bind-print-variables (prin1 form (current-buffer))))
|
|
|
|
(defun gnus-prin1-to-string (form)
|
|
"The same as `prin1'.
|
|
Bind `print-quoted' to t, and `print-length' and `print-level' to
|
|
nil. See also `gnus-bind-print-variables'."
|
|
(gnus-bind-print-variables (prin1-to-string form)))
|
|
|
|
(defun gnus-pp (form &optional stream)
|
|
"Use `pp' on FORM in the current buffer.
|
|
Bind `print-quoted' to t, and `print-length' and `print-level' to
|
|
nil. See also `gnus-bind-print-variables'."
|
|
(gnus-bind-print-variables (pp form (or stream (current-buffer)))))
|
|
|
|
(defun gnus-pp-to-string (form)
|
|
"The same as `pp-to-string'.
|
|
Bind `print-quoted' to t, and `print-length' and `print-level' to
|
|
nil. See also `gnus-bind-print-variables'."
|
|
(gnus-bind-print-variables (pp-to-string form)))
|
|
|
|
(defun gnus-make-directory (directory)
|
|
"Make DIRECTORY (and all its parents) if it doesn't exist."
|
|
(require 'nnmail)
|
|
(let ((file-name-coding-system nnmail-pathname-coding-system))
|
|
(when (and directory
|
|
(not (file-exists-p directory)))
|
|
(make-directory directory t)))
|
|
t)
|
|
|
|
(defun gnus-write-buffer (file)
|
|
"Write the current buffer's contents to FILE."
|
|
(require 'nnmail)
|
|
(let ((file-name-coding-system nnmail-pathname-coding-system))
|
|
;; Make sure the directory exists.
|
|
(gnus-make-directory (file-name-directory file))
|
|
;; Write the buffer.
|
|
(write-region (point-min) (point-max) file nil 'quietly)))
|
|
|
|
(defun gnus-delete-file (file)
|
|
"Delete FILE if it exists."
|
|
(when (file-exists-p file)
|
|
(delete-file file)))
|
|
|
|
(defun gnus-delete-directory (directory)
|
|
"Delete files in DIRECTORY. Subdirectories remain.
|
|
If there's no subdirectory, delete DIRECTORY as well."
|
|
(when (file-directory-p directory)
|
|
(let ((files (directory-files
|
|
directory t directory-files-no-dot-files-regexp))
|
|
file dir)
|
|
(while files
|
|
(setq file (pop files))
|
|
(if (eq t (car (file-attributes file)))
|
|
;; `file' is a subdirectory.
|
|
(setq dir t)
|
|
;; `file' is a file or a symlink.
|
|
(delete-file file)))
|
|
(unless dir
|
|
(delete-directory directory)))))
|
|
|
|
(defun gnus-strip-whitespace (string)
|
|
"Return STRING stripped of all whitespace."
|
|
(while (string-match "[\r\n\t ]+" string)
|
|
(setq string (replace-match "" t t string)))
|
|
string)
|
|
|
|
(defsubst gnus-put-text-property-excluding-newlines (beg end prop val)
|
|
"Like `put-text-property', but don't put this prop on any newlines in the region."
|
|
(save-match-data
|
|
(save-excursion
|
|
(save-restriction
|
|
(goto-char beg)
|
|
(while (re-search-forward gnus-emphasize-whitespace-regexp end 'move)
|
|
(put-text-property beg (match-beginning 0) prop val)
|
|
(setq beg (point)))
|
|
(put-text-property beg (point) prop val)))))
|
|
|
|
(defsubst gnus-put-overlay-excluding-newlines (beg end prop val)
|
|
"Like `put-text-property', but don't put this prop on any newlines in the region."
|
|
(save-match-data
|
|
(save-excursion
|
|
(save-restriction
|
|
(goto-char beg)
|
|
(while (re-search-forward gnus-emphasize-whitespace-regexp end 'move)
|
|
(overlay-put (make-overlay beg (match-beginning 0)) prop val)
|
|
(setq beg (point)))
|
|
(overlay-put (make-overlay beg (point)) prop val)))))
|
|
|
|
(defun gnus-put-text-property-excluding-characters-with-faces (beg end prop val)
|
|
"The same as `put-text-property', except where `gnus-face' is set.
|
|
If so, and PROP is `face', set the second element of its value to VAL.
|
|
Otherwise, do nothing."
|
|
(while (< beg end)
|
|
;; Property values are compared with `eq'.
|
|
(let ((stop (next-single-property-change beg 'face nil end)))
|
|
(if (get-text-property beg 'gnus-face)
|
|
(when (eq prop 'face)
|
|
(setcar (cdr (get-text-property beg 'face)) (or val 'default)))
|
|
(inline
|
|
(put-text-property beg stop prop val)))
|
|
(setq beg stop))))
|
|
|
|
(defun gnus-get-text-property-excluding-characters-with-faces (pos prop)
|
|
"The same as `get-text-property', except where `gnus-face' is set.
|
|
If so, and PROP is `face', return the second element of its value.
|
|
Otherwise, return the value."
|
|
(let ((val (get-text-property pos prop)))
|
|
(if (and (get-text-property pos 'gnus-face)
|
|
(eq prop 'face))
|
|
(cadr val)
|
|
(get-text-property pos prop))))
|
|
|
|
(defmacro gnus-faces-at (position)
|
|
"Return a list of faces at POSITION."
|
|
`(let ((pos ,position))
|
|
(delq nil (cons (get-text-property pos 'face)
|
|
(mapcar
|
|
(lambda (overlay)
|
|
(overlay-get overlay 'face))
|
|
(overlays-at pos))))))
|
|
|
|
;;; Protected and atomic operations. dmoore@ucsd.edu 21.11.1996
|
|
;; The primary idea here is to try to protect internal data structures
|
|
;; from becoming corrupted when the user hits C-g, or if a hook or
|
|
;; similar blows up. Often in Gnus multiple tables/lists need to be
|
|
;; updated at the same time, or information can be lost.
|
|
|
|
(defvar gnus-atomic-be-safe t
|
|
"If t, certain operations will be protected from interruption by C-g.")
|
|
|
|
(defmacro gnus-atomic-progn (&rest forms)
|
|
"Evaluate FORMS atomically, which means to protect the evaluation
|
|
from being interrupted by the user. An error from the forms themselves
|
|
will return without finishing the operation. Since interrupts from
|
|
the user are disabled, it is recommended that only the most minimal
|
|
operations are performed by FORMS. If you wish to assign many
|
|
complicated values atomically, compute the results into temporary
|
|
variables and then do only the assignment atomically."
|
|
(declare (indent 0) (debug t))
|
|
`(let ((inhibit-quit gnus-atomic-be-safe))
|
|
,@forms))
|
|
|
|
(defvar mm-text-coding-system)
|
|
(declare-function mm-append-to-file "mm-util"
|
|
(start end filename &optional codesys inhibit))
|
|
|
|
(defun gnus-output-to-mail (filename &optional ask)
|
|
"Append the current article to a mail file named FILENAME."
|
|
(require 'nnmail)
|
|
(setq filename (expand-file-name filename))
|
|
(let ((artbuf (current-buffer))
|
|
(tmpbuf (gnus-get-buffer-create " *Gnus-output*")))
|
|
(save-excursion
|
|
;; Create the file, if it doesn't exist.
|
|
(when (and (not (get-file-buffer filename))
|
|
(not (file-exists-p filename)))
|
|
(if (or (not ask)
|
|
(gnus-y-or-n-p
|
|
(concat "\"" filename "\" does not exist, create it? ")))
|
|
(let ((file-buffer (create-file-buffer filename)))
|
|
(with-current-buffer file-buffer
|
|
(let ((require-final-newline nil)
|
|
(coding-system-for-write mm-text-coding-system))
|
|
(gnus-write-buffer filename)))
|
|
(kill-buffer file-buffer))
|
|
(error "Output file does not exist")))
|
|
(set-buffer tmpbuf)
|
|
(erase-buffer)
|
|
(insert-buffer-substring artbuf)
|
|
(goto-char (point-min))
|
|
(if (looking-at "From ")
|
|
(forward-line 1)
|
|
(insert "From nobody " (current-time-string) "\n"))
|
|
(let (case-fold-search)
|
|
(while (re-search-forward "^From " nil t)
|
|
(beginning-of-line)
|
|
(insert ">")))
|
|
;; Decide whether to append to a file or to an Emacs buffer.
|
|
(let ((outbuf (get-file-buffer filename)))
|
|
(if (not outbuf)
|
|
(let ((buffer-read-only nil))
|
|
(save-excursion
|
|
(goto-char (point-max))
|
|
(forward-char -2)
|
|
(unless (looking-at "\n\n")
|
|
(goto-char (point-max))
|
|
(unless (bolp)
|
|
(insert "\n"))
|
|
(insert "\n"))
|
|
(goto-char (point-max))
|
|
(let ((file-name-coding-system nnmail-pathname-coding-system))
|
|
(mm-append-to-file (point-min) (point-max) filename))))
|
|
;; File has been visited, in buffer OUTBUF.
|
|
(set-buffer outbuf)
|
|
(let ((buffer-read-only nil))
|
|
(goto-char (point-max))
|
|
(unless (eobp)
|
|
(insert "\n"))
|
|
(insert "\n")
|
|
(insert-buffer-substring tmpbuf)))))
|
|
(kill-buffer tmpbuf)))
|
|
|
|
(defun gnus-map-function (funs arg)
|
|
"Apply the result of the first function in FUNS to the second, and so on.
|
|
ARG is passed to the first function."
|
|
(while funs
|
|
(setq arg (funcall (pop funs) arg)))
|
|
arg)
|
|
|
|
(defun gnus-run-hooks (&rest funcs)
|
|
"Does the same as `run-hooks', but saves the current buffer."
|
|
(save-current-buffer
|
|
(apply #'run-hooks funcs)))
|
|
|
|
(defun gnus-run-hook-with-args (hook &rest args)
|
|
"Does the same as `run-hook-with-args', but saves the current buffer."
|
|
(save-current-buffer
|
|
(apply #'run-hook-with-args hook args)))
|
|
|
|
(defun gnus-run-mode-hooks (&rest funcs)
|
|
"Run `run-mode-hooks', saving the current buffer."
|
|
(save-current-buffer (apply #'run-mode-hooks funcs)))
|
|
|
|
;;; Various
|
|
|
|
(defmacro gnus--\,@ (exp)
|
|
"Splice EXP's value (a list of Lisp forms) into the code."
|
|
(declare (debug t))
|
|
`(progn ,@(eval exp t)))
|
|
|
|
(defvar gnus-group-buffer) ; Compiler directive
|
|
(defun gnus-alive-p ()
|
|
"Say whether Gnus is running or not."
|
|
(and (boundp 'gnus-group-buffer)
|
|
(get-buffer gnus-group-buffer)
|
|
(with-current-buffer gnus-group-buffer
|
|
(eq major-mode 'gnus-group-mode))))
|
|
|
|
(define-obsolete-function-alias 'gnus-remove-if #'seq-remove "27.1")
|
|
|
|
(define-obsolete-function-alias 'gnus-remove-if-not #'seq-filter "27.1")
|
|
|
|
(defun gnus-grep-in-list (word list)
|
|
"Find if a WORD matches any regular expression in the given LIST."
|
|
(when (and word list)
|
|
(catch 'found
|
|
(dolist (r list)
|
|
(when (string-match r word)
|
|
(throw 'found r))))))
|
|
|
|
(defmacro gnus-alist-pull (key alist &optional assoc-p)
|
|
"Modify ALIST to be without KEY."
|
|
(unless (symbolp alist)
|
|
(error "Not a symbol: %s" alist))
|
|
(let ((fun (if assoc-p 'assoc 'assq)))
|
|
`(setq ,alist (delq (,fun ,key ,alist) ,alist))))
|
|
|
|
(defun gnus-globalify-regexp (re)
|
|
"Return a regexp that matches a whole line, if RE matches a part of it."
|
|
(concat (unless (string-match "^\\^" re) "^.*")
|
|
re
|
|
(unless (string-match "\\$$" re) ".*$")))
|
|
|
|
(defun gnus-set-window-start (&optional point)
|
|
"Set the window start to POINT, or (point) if nil."
|
|
(let ((win (gnus-get-buffer-window (current-buffer) t)))
|
|
(when win
|
|
(set-window-start win (or point (point))))))
|
|
|
|
(defun gnus-annotation-in-region-p (b e)
|
|
(if (= b e)
|
|
(eq (cadr (memq 'gnus-undeletable (text-properties-at b))) t)
|
|
(text-property-any b e 'gnus-undeletable t)))
|
|
|
|
(defun gnus-or (&rest elements)
|
|
"Return non-nil if any one of ELEMENTS is non-nil."
|
|
(seq-drop-while #'null elements))
|
|
|
|
(defun gnus-and (&rest elements)
|
|
"Return non-nil if all ELEMENTS are non-nil."
|
|
(not (memq nil elements)))
|
|
|
|
(defun gnus-write-active-file (file hashtb &optional full-names)
|
|
(let ((coding-system-for-write nnmail-active-file-coding-system))
|
|
(with-temp-file file
|
|
(maphash
|
|
(lambda (group active)
|
|
(when active
|
|
(insert (format "%S %d %d y\n"
|
|
(if full-names
|
|
group
|
|
(gnus-group-real-name group))
|
|
(or (cdr active)
|
|
(car active))
|
|
(car active)))))
|
|
hashtb)
|
|
(goto-char (point-max))
|
|
(while (search-backward "\\." nil t)
|
|
(delete-char 1)))))
|
|
|
|
;; Fixme: Why not use `with-output-to-temp-buffer'?
|
|
(defmacro gnus-with-output-to-file (file &rest body)
|
|
(declare (indent 1) (debug t))
|
|
(let ((buffer (make-symbol "output-buffer"))
|
|
(size (make-symbol "output-buffer-size"))
|
|
(leng (make-symbol "output-buffer-length"))
|
|
(append (make-symbol "output-buffer-append")))
|
|
`(let* ((,size 131072)
|
|
(,buffer (make-string ,size 0))
|
|
(,leng 0)
|
|
(,append nil)
|
|
(standard-output
|
|
(lambda (c)
|
|
(aset ,buffer ,leng c)
|
|
|
|
(if (= ,size (setq ,leng (1+ ,leng)))
|
|
(progn (write-region ,buffer nil ,file ,append 'no-msg)
|
|
(setq ,leng 0
|
|
,append t))))))
|
|
,@body
|
|
(when (> ,leng 0)
|
|
(let ((coding-system-for-write 'no-conversion))
|
|
(write-region (substring ,buffer 0 ,leng) nil ,file
|
|
,append 'no-msg))))))
|
|
|
|
(defun gnus-add-text-properties-when
|
|
(property value start end properties &optional object)
|
|
"Like `add-text-properties', only applied on where PROPERTY is VALUE."
|
|
(let (point)
|
|
(while (and start
|
|
(< start end) ;; XEmacs will loop for every when start=end.
|
|
(setq point (text-property-not-all start end property value)))
|
|
(add-text-properties start point properties object)
|
|
(setq start (text-property-any point end property value)))
|
|
(if start
|
|
(add-text-properties start end properties object))))
|
|
|
|
(defun gnus-remove-text-properties-when
|
|
(property value start end properties &optional object)
|
|
"Like `remove-text-properties', only applied on where PROPERTY is VALUE."
|
|
(let (point)
|
|
(while (and start
|
|
(< start end)
|
|
(setq point (text-property-not-all start end property value)))
|
|
(remove-text-properties start point properties object)
|
|
(setq start (text-property-any point end property value)))
|
|
(if start
|
|
(remove-text-properties start end properties object))
|
|
t))
|
|
|
|
(defun gnus-string-remove-all-properties (string)
|
|
(condition-case ()
|
|
(let ((s string))
|
|
(set-text-properties 0 (length string) nil string)
|
|
s)
|
|
(error string)))
|
|
|
|
;; This might use `compare-strings' to reduce consing in the
|
|
;; case-insensitive case, but it has to cope with null args.
|
|
;; (`string-equal' uses symbol print names.)
|
|
(defun gnus-string-equal (x y)
|
|
"Like `string-equal', except it compares case-insensitively."
|
|
(declare (obsolete string-equal-ignore-case "29.1"))
|
|
(and (= (length x) (length y))
|
|
(or (string-equal x y)
|
|
(string-equal (downcase x) (downcase y)))))
|
|
|
|
(defcustom gnus-use-byte-compile t
|
|
"If non-nil, byte-compile crucial run-time code."
|
|
:type 'boolean
|
|
:version "22.1"
|
|
:group 'gnus-various)
|
|
|
|
(defun gnus-byte-compile (form)
|
|
"Byte-compile FORM if `gnus-use-byte-compile' is non-nil."
|
|
(if gnus-use-byte-compile
|
|
(let ((byte-compile-warnings '(unresolved callargs redefine))
|
|
(lexical-binding t))
|
|
(byte-compile form))
|
|
(eval form t)))
|
|
|
|
(defun gnus-remassoc (key alist)
|
|
"Delete by side effect any elements of LIST whose car is `equal' to KEY.
|
|
The modified LIST is returned. If the first member
|
|
of LIST has a car that is `equal' to KEY, there is no way to remove it
|
|
by side effect; therefore, write `(setq foo (gnus-remassoc key foo))' to be
|
|
sure of changing the value of `foo'."
|
|
(when alist
|
|
(if (equal key (caar alist))
|
|
(cdr alist)
|
|
(setcdr alist (gnus-remassoc key (cdr alist)))
|
|
alist)))
|
|
|
|
(defun gnus-update-alist-soft (key value alist)
|
|
(if value
|
|
(cons (cons key value) (gnus-remassoc key alist))
|
|
(gnus-remassoc key alist)))
|
|
|
|
(defvar gnus-info-buffer)
|
|
(declare-function gnus-configure-windows "gnus-win" (setting &optional force))
|
|
|
|
(defun gnus-create-info-command (node)
|
|
"Create a command that will go to info NODE."
|
|
(lambda ()
|
|
(:documentation (format "Enter the info system at node %s." node))
|
|
(interactive)
|
|
(info node)
|
|
(setq gnus-info-buffer (current-buffer))
|
|
(gnus-configure-windows 'info)))
|
|
|
|
(defalias 'gnus-not-ignore #'always)
|
|
|
|
(defvar gnus-directory-sep-char-regexp "/"
|
|
"The regexp of directory separator character.
|
|
If you find some problem with the directory separator character, try
|
|
\"[/\\\\]\" for some systems.")
|
|
|
|
(autoload 'url-unhex "url-util")
|
|
(define-obsolete-function-alias 'gnus-url-unhex #'url-unhex "29.1")
|
|
|
|
;; FIXME: Make obsolete in favor of `url-unhex-string', which is
|
|
;; identical except for the call to `char-to-string'.
|
|
(defun gnus-url-unhex-string (str &optional allow-newlines)
|
|
"Remove %XX, embedded spaces, etc in a url.
|
|
If optional second argument ALLOW-NEWLINES is non-nil, then allow the
|
|
decoding of carriage returns and line feeds in the string, which is normally
|
|
forbidden in URL encoding."
|
|
(let ((tmp "")
|
|
(case-fold-search t))
|
|
(while (string-match "%[0-9a-f][0-9a-f]" str)
|
|
(let* ((start (match-beginning 0))
|
|
(ch1 (url-unhex (elt str (+ start 1))))
|
|
(code (+ (* 16 ch1)
|
|
(url-unhex (elt str (+ start 2))))))
|
|
(setq tmp (concat
|
|
tmp (substring str 0 start)
|
|
(cond
|
|
(allow-newlines
|
|
(char-to-string code))
|
|
((or (= code ?\n) (= code ?\r))
|
|
" ")
|
|
(t (char-to-string code))))
|
|
str (substring str (match-end 0)))))
|
|
(setq tmp (concat tmp str))
|
|
tmp))
|
|
|
|
(defun gnus-make-predicate (spec)
|
|
"Transform SPEC into a function that can be called.
|
|
SPEC is a predicate specifier that contains stuff like `or', `and',
|
|
`not', lists and functions. The functions all take one parameter."
|
|
`(lambda (elem) ,(gnus-make-predicate-1 spec)))
|
|
|
|
(defun gnus-make-predicate-1 (spec)
|
|
(cond
|
|
((symbolp spec)
|
|
`(,spec elem))
|
|
((listp spec)
|
|
(if (memq (car spec) '(or and not))
|
|
`(,(car spec) ,@(mapcar #'gnus-make-predicate-1 (cdr spec)))
|
|
(error "Invalid predicate specifier: %s" spec)))))
|
|
|
|
(defun gnus-completing-read (prompt collection &optional require-match
|
|
initial-input history def)
|
|
"Call `gnus-completing-read-function'."
|
|
(funcall gnus-completing-read-function
|
|
(format-prompt prompt def)
|
|
collection require-match initial-input history def))
|
|
|
|
(defun gnus-emacs-completing-read (prompt collection &optional require-match
|
|
initial-input history def)
|
|
"Call standard `completing-read-function'."
|
|
(let ((completion-styles gnus-completion-styles))
|
|
(completing-read prompt collection
|
|
nil require-match initial-input history def)))
|
|
|
|
(autoload 'ido-completing-read "ido")
|
|
(defun gnus-ido-completing-read (prompt collection &optional require-match
|
|
initial-input history def)
|
|
"Call `ido-completing-read'."
|
|
(ido-completing-read prompt collection nil require-match
|
|
initial-input history def))
|
|
|
|
|
|
(declare-function iswitchb-read-buffer "iswitchb"
|
|
(prompt &optional default require-match
|
|
_predicate start matches-set))
|
|
(declare-function iswitchb-minibuffer-setup "iswitchb")
|
|
(defvar iswitchb-temp-buflist)
|
|
(defvar iswitchb-mode)
|
|
(defvar iswitchb-make-buflist-hook)
|
|
|
|
(defun gnus-iswitchb-completing-read (prompt collection &optional require-match
|
|
initial-input history def)
|
|
"`iswitchb' based completing-read function."
|
|
(declare (obsolete nil "29.1"))
|
|
;; Make sure iswitchb is loaded before we let-bind its variables.
|
|
;; If it is loaded inside the let, variables can become unbound afterwards.
|
|
(require 'iswitchb)
|
|
(let ((iswitchb-make-buflist-hook
|
|
(lambda ()
|
|
(setq iswitchb-temp-buflist
|
|
(let ((choices (append
|
|
(when initial-input (list initial-input))
|
|
(symbol-value history) collection))
|
|
filtered-choices)
|
|
(dolist (x choices)
|
|
(setq filtered-choices (cl-adjoin x filtered-choices)))
|
|
(nreverse filtered-choices))))))
|
|
(unwind-protect
|
|
(progn
|
|
(or iswitchb-mode
|
|
(add-hook 'minibuffer-setup-hook #'iswitchb-minibuffer-setup))
|
|
(iswitchb-read-buffer prompt def require-match))
|
|
(or iswitchb-mode
|
|
(remove-hook 'minibuffer-setup-hook #'iswitchb-minibuffer-setup)))))
|
|
|
|
(defmacro gnus-parse-without-error (&rest body)
|
|
"Allow continuing onto the next line even if an error occurs."
|
|
(declare (indent 0) (debug t))
|
|
`(while (not (eobp))
|
|
(condition-case ()
|
|
(progn
|
|
,@body
|
|
(goto-char (point-max)))
|
|
(error
|
|
(gnus-error 4 "Invalid data on line %d"
|
|
(count-lines (point-min) (point)))
|
|
(forward-line 1)))))
|
|
|
|
(defun gnus-cache-file-contents (file variable function)
|
|
"Cache the contents of FILE in VARIABLE. The contents come from FUNCTION."
|
|
(let ((time (file-attribute-modification-time (file-attributes file)))
|
|
contents value)
|
|
(if (or (null (setq value (symbol-value variable)))
|
|
(not (equal (car value) file))
|
|
(not (time-equal-p (nth 1 value) time)))
|
|
(progn
|
|
(setq contents (funcall function file))
|
|
(set variable (list file time contents))
|
|
contents)
|
|
(nth 2 value))))
|
|
|
|
(defun gnus-multiple-choice (prompt choice &optional idx)
|
|
"Ask user a multiple choice question.
|
|
CHOICE is a list of the choice char and help message at IDX."
|
|
(let (tchar buf)
|
|
(save-window-excursion
|
|
(save-excursion
|
|
(while (not tchar)
|
|
(message "%s (%s): "
|
|
prompt
|
|
(concat
|
|
(mapconcat (lambda (s) (char-to-string (car s)))
|
|
choice ", ")
|
|
", ?"))
|
|
(setq tchar (read-char))
|
|
(when (not (assq tchar choice))
|
|
(setq tchar nil)
|
|
(setq buf (gnus-get-buffer-create "*Gnus Help*"))
|
|
(pop-to-buffer buf)
|
|
(fundamental-mode)
|
|
(buffer-disable-undo)
|
|
(erase-buffer)
|
|
(insert prompt ":\n\n")
|
|
(let ((max -1)
|
|
(list choice)
|
|
(alist choice)
|
|
(idx (or idx 1))
|
|
(i 0)
|
|
n width pad format)
|
|
;; find the longest string to display
|
|
(while list
|
|
(setq n (length (nth idx (car list))))
|
|
(unless (> max n)
|
|
(setq max n))
|
|
(setq list (cdr list)))
|
|
(setq max (+ max 4)) ; %c, `:', SPACE, a SPACE at end
|
|
(setq n (/ (1- (window-width)) max)) ; items per line
|
|
(setq width (/ (1- (window-width)) n)) ; width of each item
|
|
;; insert `n' items, each in a field of width `width'
|
|
(while alist
|
|
(if (< i n)
|
|
()
|
|
(setq i 0)
|
|
(delete-char -1) ; the `\n' takes a char
|
|
(insert "\n"))
|
|
(setq pad (- width 3))
|
|
(setq format (concat "%c: %-" (int-to-string pad) "s"))
|
|
(insert (format format (caar alist) (nth idx (car alist))))
|
|
(setq alist (cdr alist))
|
|
(setq i (1+ i))))))))
|
|
(if (buffer-live-p buf)
|
|
(kill-buffer buf))
|
|
tchar))
|
|
|
|
(defun gnus-frame-or-window-display-name (object)
|
|
"Given a frame or window, return the associated display name.
|
|
Return nil otherwise."
|
|
(if (or (framep object)
|
|
(and (windowp object)
|
|
(setq object (window-frame object))))
|
|
(let ((display (frame-parameter object 'display)))
|
|
(if (and (stringp display)
|
|
;; Exclude invalid display names.
|
|
(string-match "\\`[^:]*:[0-9]+\\(\\.[0-9]+\\)?\\'"
|
|
display))
|
|
display))))
|
|
|
|
(defvar tool-bar-mode)
|
|
|
|
(defun gnus-tool-bar-update (&rest _ignore)
|
|
"Update the tool bar."
|
|
(when (and (boundp 'tool-bar-mode)
|
|
tool-bar-mode)
|
|
(let* ((args nil)
|
|
(func (cond ((fboundp 'tool-bar-update)
|
|
'tool-bar-update)
|
|
((fboundp 'force-window-update)
|
|
'force-window-update)
|
|
((fboundp 'redraw-frame)
|
|
(setq args (list (selected-frame)))
|
|
'redraw-frame)
|
|
(t 'ignore))))
|
|
(apply func args))))
|
|
|
|
;; Fixme: This has only one use (in gnus-agent), which isn't worthwhile.
|
|
(defmacro gnus-mapcar (function seq1 &rest seqs2_n)
|
|
"Apply FUNCTION to each element of the sequences, and make a list of the results.
|
|
If there are several sequences, FUNCTION is called with that many arguments,
|
|
and mapping stops as soon as the shortest sequence runs out. With just one
|
|
sequence, this is like `mapcar'. With several, it is like the Common Lisp
|
|
`mapcar' function extended to arbitrary sequence types."
|
|
|
|
(if seqs2_n
|
|
(let* ((seqs (cons seq1 seqs2_n))
|
|
(cnt 0)
|
|
(heads (mapcar (lambda (_seq)
|
|
(make-symbol (concat "head"
|
|
(int-to-string
|
|
(setq cnt (1+ cnt))))))
|
|
seqs))
|
|
(result (make-symbol "result"))
|
|
(result-tail (make-symbol "result-tail")))
|
|
`(let* ,(let* ((bindings (cons nil nil))
|
|
(heads heads))
|
|
(nconc bindings (list (list result '(cons nil nil))))
|
|
(nconc bindings (list (list result-tail result)))
|
|
(while heads
|
|
(nconc bindings (list (list (pop heads) (pop seqs)))))
|
|
(cdr bindings))
|
|
(while (and ,@heads)
|
|
(setcdr ,result-tail (cons (funcall ,function
|
|
,@(mapcar (lambda (h) (list 'car h))
|
|
heads))
|
|
nil))
|
|
(setq ,result-tail (cdr ,result-tail)
|
|
,@(mapcan (lambda (h) (list h (list 'cdr h))) heads)))
|
|
(cdr ,result)))
|
|
`(mapcar ,function ,seq1)))
|
|
|
|
(defun gnus-emacs-version ()
|
|
"Stringified Emacs version."
|
|
(let* ((lst (if (listp gnus-user-agent)
|
|
gnus-user-agent
|
|
'(gnus emacs type)))
|
|
(system-v (cond ((memq 'config lst)
|
|
system-configuration)
|
|
((memq 'type lst)
|
|
(symbol-name system-type))
|
|
(t nil))))
|
|
(cond
|
|
((not (memq 'emacs lst))
|
|
nil)
|
|
((string-match "^[.0-9]*\\.[0-9]+$" emacs-version)
|
|
(concat "Emacs/" emacs-version
|
|
(if system-v
|
|
(concat " (" system-v ")")
|
|
"")))
|
|
(t emacs-version))))
|
|
|
|
(defun gnus-rename-file (old-path new-path &optional trim)
|
|
"Rename OLD-PATH as NEW-PATH.
|
|
If TRIM, recursively delete empty directories from OLD-PATH."
|
|
(when (file-exists-p old-path)
|
|
(let* ((old-dir (file-name-directory old-path))
|
|
;; (old-name (file-name-nondirectory old-path))
|
|
(new-dir (file-name-directory new-path))
|
|
;; (new-name (file-name-nondirectory new-path))
|
|
temp)
|
|
(gnus-make-directory new-dir)
|
|
(rename-file old-path new-path t)
|
|
(when trim
|
|
(while (progn (setq temp (directory-files old-dir))
|
|
(while (member (car temp) '("." ".."))
|
|
(setq temp (cdr temp)))
|
|
(= (length temp) 0))
|
|
(delete-directory old-dir)
|
|
(setq old-dir (file-name-as-directory
|
|
(file-truename
|
|
(concat old-dir "..")))))))))
|
|
|
|
(defun gnus-set-file-modes (filename mode &optional flag)
|
|
"Wrapper for `set-file-modes'."
|
|
(ignore-errors
|
|
(set-file-modes filename mode flag)))
|
|
|
|
(defun gnus-rescale-image (image size)
|
|
"Rescale IMAGE to SIZE if possible.
|
|
SIZE is in format (WIDTH . HEIGHT). Return a new image.
|
|
Sizes are in pixels."
|
|
(when (display-images-p)
|
|
(declare-function image-size "image.c" (spec &optional pixels frame))
|
|
(let ((new-width (car size))
|
|
(new-height (cdr size)))
|
|
(when (> (cdr (image-size image t)) new-height)
|
|
(setq image (create-image (plist-get (cdr image) :data) nil t
|
|
:max-height new-height)))
|
|
(when (> (car (image-size image t)) new-width)
|
|
(setq image (create-image (plist-get (cdr image) :data) nil t
|
|
:max-width new-width)))))
|
|
image)
|
|
|
|
(defun gnus-recursive-directory-files (dir)
|
|
"Return all regular files below DIR.
|
|
The first found will be returned if a file has hard or symbolic links."
|
|
(let (files attr attrs)
|
|
(cl-labels
|
|
((fn (directory)
|
|
(dolist (file (directory-files directory t))
|
|
(setq attr (file-attributes (file-truename file)))
|
|
(when (and (not (member attr attrs))
|
|
(not (member (file-name-nondirectory file)
|
|
'("." "..")))
|
|
(file-readable-p file))
|
|
(push attr attrs)
|
|
(cond ((file-regular-p file)
|
|
(push file files))
|
|
((file-directory-p file)
|
|
(fn file)))))))
|
|
(fn dir))
|
|
files))
|
|
|
|
(defun gnus-list-memq-of-list (elements list)
|
|
"Return non-nil if any of the members of ELEMENTS are in LIST."
|
|
(let ((found nil))
|
|
(dolist (elem elements)
|
|
(setq found (or found
|
|
(memq elem list))))
|
|
found))
|
|
|
|
(defun gnus-test-list (list predicate)
|
|
"To each element of LIST apply PREDICATE.
|
|
Return nil if LIST is no list or is empty or some test returns nil;
|
|
otherwise, return t."
|
|
(declare (obsolete nil "28.1"))
|
|
(when (and list (listp list))
|
|
(let ((result (mapcar predicate list)))
|
|
(not (memq nil result)))))
|
|
|
|
(defun gnus-subsetp (list1 list2)
|
|
"Return t if LIST1 is a subset of LIST2.
|
|
Similar to `subsetp' but use member for element test so that this works for
|
|
lists of strings."
|
|
(when (and (listp list1) (listp list2))
|
|
(if list1
|
|
(and (member (car list1) list2)
|
|
(gnus-subsetp (cdr list1) list2))
|
|
t)))
|
|
|
|
(defun gnus-setdiff (list1 list2)
|
|
"Return member-based set difference of LIST1 and LIST2."
|
|
(when (and list1 (listp list1) (listp list2))
|
|
(if (member (car list1) list2)
|
|
(gnus-setdiff (cdr list1) list2)
|
|
(cons (car list1) (gnus-setdiff (cdr list1) list2)))))
|
|
|
|
;;; Image functions.
|
|
|
|
(defun gnus-image-type-available-p (type)
|
|
(and (display-images-p)
|
|
(image-type-available-p type)))
|
|
|
|
(defun gnus-create-image (file &optional type data-p &rest props)
|
|
(let ((face (plist-get props :face)))
|
|
(when face
|
|
(setq props (plist-put props :foreground (face-foreground face)))
|
|
(setq props (plist-put props :background (face-background face))))
|
|
(ignore-errors
|
|
(apply #'create-image file type data-p props))))
|
|
|
|
(defun gnus-put-image (glyph &optional string category)
|
|
(let ((point (point)))
|
|
(insert-image glyph (or string " "))
|
|
(put-text-property point (point) 'gnus-image-category category)
|
|
(unless string
|
|
(put-text-property (1- (point)) (point)
|
|
'gnus-image-text-deletable t))
|
|
glyph))
|
|
|
|
(defun gnus-remove-image (image &optional category)
|
|
"Remove the image matching IMAGE and CATEGORY found first."
|
|
(let ((start (point-min))
|
|
val end)
|
|
(while (and (not end)
|
|
(or (setq val (get-text-property start 'display))
|
|
(and (setq start
|
|
(next-single-property-change start 'display))
|
|
(setq val (get-text-property start 'display)))))
|
|
(setq end (or (next-single-property-change start 'display)
|
|
(point-max)))
|
|
(if (and (equal val image)
|
|
(equal (get-text-property start 'gnus-image-category)
|
|
category))
|
|
(progn
|
|
(put-text-property start end 'display nil)
|
|
(when (get-text-property start 'gnus-image-text-deletable)
|
|
(delete-region start end)))
|
|
(unless (= end (point-max))
|
|
(setq start end
|
|
end nil))))))
|
|
|
|
(defun gnus-kill-all-overlays ()
|
|
"Delete all overlays in the current buffer."
|
|
(let* ((overlayss (overlay-lists))
|
|
(buffer-read-only nil)
|
|
(overlays (delq nil (nconc (car overlayss) (cdr overlayss)))))
|
|
(while overlays
|
|
(delete-overlay (pop overlays)))))
|
|
|
|
;; This function used to live in this file, but was moved to a
|
|
;; separate file to avoid pulling in rmail.el when requiring
|
|
;; gnus-util.
|
|
(autoload 'gnus-output-to-rmail "gnus-rmail")
|
|
|
|
(define-obsolete-function-alias 'gnus-delete-duplicates #'seq-uniq "29.1")
|
|
|
|
(provide 'gnus-util)
|
|
|
|
;;; gnus-util.el ends here
|