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772 lines
24 KiB
EmacsLisp
772 lines
24 KiB
EmacsLisp
;;; gnus-spec.el --- format spec functions for Gnus
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;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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;; 2005, 2006, 2007, 2008, 2009 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 <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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;; For Emacs < 22.2.
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(eval-and-compile
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(unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
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(eval-when-compile (require 'cl))
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(defvar gnus-newsrc-file-version)
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(require 'gnus)
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(defcustom gnus-use-correct-string-widths (featurep 'xemacs)
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"*If non-nil, use correct functions for dealing with wide characters."
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:version "22.1"
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:group 'gnus-format
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:type 'boolean)
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(defcustom gnus-make-format-preserve-properties (featurep 'xemacs)
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"*If non-nil, use a replacement `format' function which preserves
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text properties. This is only needed on XEmacs, as FSF Emacs does this anyway."
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:version "22.1"
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:group 'gnus-format
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:type 'boolean)
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;;; Internal variables.
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(defvar gnus-summary-mark-positions nil)
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(defvar gnus-group-mark-positions nil)
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(defvar gnus-group-indentation "")
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;; Format specs. The chunks below are the machine-generated forms
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;; that are to be evaled as the result of the default format strings.
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;; We write them in here to get them byte-compiled. That way the
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;; default actions will be quite fast, while still retaining the full
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;; flexibility of the user-defined format specs.
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;; First we have lots of dummy defvars to let the compiler know these
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;; are really dynamic variables.
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(defvar gnus-tmp-unread)
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(defvar gnus-tmp-replied)
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(defvar gnus-tmp-score-char)
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(defvar gnus-tmp-indentation)
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(defvar gnus-tmp-opening-bracket)
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(defvar gnus-tmp-lines)
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(defvar gnus-tmp-name)
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(defvar gnus-tmp-closing-bracket)
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(defvar gnus-tmp-subject-or-nil)
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(defvar gnus-tmp-subject)
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(defvar gnus-tmp-marked)
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(defvar gnus-tmp-marked-mark)
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(defvar gnus-tmp-subscribed)
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(defvar gnus-tmp-process-marked)
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(defvar gnus-tmp-number-of-unread)
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(defvar gnus-tmp-group-name)
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(defvar gnus-tmp-group)
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(defvar gnus-tmp-article-number)
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(defvar gnus-tmp-unread-and-unselected)
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(defvar gnus-tmp-news-method)
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(defvar gnus-tmp-news-server)
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(defvar gnus-tmp-article-number)
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(defvar gnus-mouse-face)
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(defvar gnus-mouse-face-prop)
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(defvar gnus-tmp-header)
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(defvar gnus-tmp-from)
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(declare-function gnus-summary-from-or-to-or-newsgroups "gnus-sum"
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(header gnus-tmp-from))
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(defun gnus-summary-line-format-spec ()
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(insert gnus-tmp-unread gnus-tmp-replied
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gnus-tmp-score-char gnus-tmp-indentation)
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(gnus-put-text-property
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(point)
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(progn
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(insert
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(format "%c%4s: %-23s%c" gnus-tmp-opening-bracket gnus-tmp-lines
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(let ((val
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(inline
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(gnus-summary-from-or-to-or-newsgroups
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gnus-tmp-header gnus-tmp-from))))
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(if (> (length val) 23)
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(substring val 0 23)
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val))
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gnus-tmp-closing-bracket))
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(point))
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gnus-mouse-face-prop gnus-mouse-face)
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(insert " " gnus-tmp-subject-or-nil "\n"))
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(defvar gnus-summary-line-format-spec
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(gnus-byte-code 'gnus-summary-line-format-spec))
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(defun gnus-summary-dummy-line-format-spec ()
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(insert "* ")
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(gnus-put-text-property
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(point)
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(progn
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(insert ": :")
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(point))
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gnus-mouse-face-prop gnus-mouse-face)
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(insert " " gnus-tmp-subject "\n"))
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(defvar gnus-summary-dummy-line-format-spec
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(gnus-byte-code 'gnus-summary-dummy-line-format-spec))
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(defun gnus-group-line-format-spec ()
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(insert gnus-tmp-marked-mark gnus-tmp-subscribed
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gnus-tmp-process-marked
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gnus-group-indentation
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(format "%5s: " gnus-tmp-number-of-unread))
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(gnus-put-text-property
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(point)
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(progn
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(insert gnus-tmp-group "\n")
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(1- (point)))
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gnus-mouse-face-prop gnus-mouse-face))
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(defvar gnus-group-line-format-spec
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(gnus-byte-code 'gnus-group-line-format-spec))
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(defvar gnus-format-specs
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`((version . ,emacs-version)
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(gnus-version . ,(gnus-continuum-version))
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(group "%M\%S\%p\%P\%5y: %(%g%)\n" ,gnus-group-line-format-spec)
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(summary-dummy "* %(: :%) %S\n"
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,gnus-summary-dummy-line-format-spec)
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(summary "%U%R%z%I%(%[%4L: %-23,23f%]%) %s\n"
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,gnus-summary-line-format-spec))
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"Alist of format specs.")
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(defvar gnus-default-format-specs gnus-format-specs)
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(defvar gnus-article-mode-line-format-spec nil)
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(defvar gnus-summary-mode-line-format-spec nil)
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(defvar gnus-group-mode-line-format-spec nil)
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;;; Phew. All that gruft is over with, fortunately.
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;;;###autoload
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(defun gnus-update-format (var)
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"Update the format specification near point."
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(interactive
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(list
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(save-excursion
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(eval-defun nil)
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;; Find the end of the current word.
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(re-search-forward "[ \t\n]" nil t)
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;; Search backward.
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(when (re-search-backward "\\(gnus-[-a-z]+-line-format\\)" nil t)
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(match-string 1)))))
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(let* ((type (intern (progn (string-match "gnus-\\([-a-z]+\\)-line" var)
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(match-string 1 var))))
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(entry (assq type gnus-format-specs))
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value spec)
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(when entry
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(setq gnus-format-specs (delq entry gnus-format-specs)))
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(set
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(intern (format "%s-spec" var))
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(gnus-parse-format (setq value (symbol-value (intern var)))
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(symbol-value (intern (format "%s-alist" var)))
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(not (string-match "mode" var))))
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(setq spec (symbol-value (intern (format "%s-spec" var))))
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(push (list type value spec) gnus-format-specs)
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(pop-to-buffer "*Gnus Format*")
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(erase-buffer)
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(lisp-interaction-mode)
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(insert (gnus-pp-to-string spec))))
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(defun gnus-update-format-specifications (&optional force &rest types)
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"Update all (necessary) format specifications.
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Return a list of updated types."
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;; Make the indentation array.
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;; See whether all the stored info needs to be flushed.
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(when (or force
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(not gnus-newsrc-file-version)
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(not (equal (gnus-continuum-version)
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(gnus-continuum-version gnus-newsrc-file-version)))
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(not (equal emacs-version
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(cdr (assq 'version gnus-format-specs)))))
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(setq gnus-format-specs nil))
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;; Flush the group format spec cache if there's the grouplens stuff
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;; or it doesn't support decoded group names.
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(when (memq 'group types)
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(let* ((spec (assq 'group gnus-format-specs))
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(sspec (gnus-prin1-to-string (nth 2 spec))))
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(when (or (string-match " gnus-tmp-grouplens[ )]" sspec)
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(not (string-match " gnus-tmp-decoded-group[ )]" sspec)))
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(setq gnus-format-specs (delq spec gnus-format-specs)))))
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;; Go through all the formats and see whether they need updating.
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(let (new-format entry type val updated)
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(while (setq type (pop types))
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;; Jump to the proper buffer to find out the value of the
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;; variable, if possible. (It may be buffer-local.)
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(save-excursion
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(let ((buffer (intern (format "gnus-%s-buffer" type))))
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(when (and (boundp buffer)
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(setq val (symbol-value buffer))
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(gnus-buffer-exists-p val))
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(set-buffer val))
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(setq new-format (symbol-value
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(intern (format "gnus-%s-line-format" type)))))
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(setq entry (cdr (assq type gnus-format-specs)))
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(if (and (car entry)
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(equal (car entry) new-format))
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;; Use the old format.
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(set (intern (format "gnus-%s-line-format-spec" type))
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(cadr entry))
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;; This is a new format.
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(setq val
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(if (not (stringp new-format))
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;; This is a function call or something.
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new-format
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;; This is a "real" format.
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(gnus-parse-format
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new-format
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(symbol-value
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(intern (format "gnus-%s-line-format-alist" type)))
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(not (string-match "mode$" (symbol-name type))))))
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;; Enter the new format spec into the list.
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(if entry
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(progn
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(setcar (cdr entry) val)
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(setcar entry new-format))
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(push (list type new-format val) gnus-format-specs))
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(set (intern (format "gnus-%s-line-format-spec" type)) val)
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(push type updated))))
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(unless (assq 'version gnus-format-specs)
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(push (cons 'version emacs-version) gnus-format-specs))
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updated))
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(defvar gnus-mouse-face-0 'highlight)
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(defvar gnus-mouse-face-1 'highlight)
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(defvar gnus-mouse-face-2 'highlight)
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(defvar gnus-mouse-face-3 'highlight)
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(defvar gnus-mouse-face-4 'highlight)
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(defun gnus-mouse-face-function (form type)
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`(gnus-put-text-property
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(point) (progn ,@form (point))
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gnus-mouse-face-prop
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,(if (equal type 0)
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'gnus-mouse-face
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`(quote ,(symbol-value (intern (format "gnus-mouse-face-%d" type)))))))
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(defvar gnus-face-0 'bold)
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(defvar gnus-face-1 'italic)
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(defvar gnus-face-2 'bold-italic)
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(defvar gnus-face-3 'bold)
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(defvar gnus-face-4 'bold)
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(defun gnus-face-face-function (form type)
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`(gnus-add-text-properties
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(point) (progn ,@form (point))
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'(gnus-face t face ,(symbol-value (intern (format "gnus-face-%d" type))))))
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(defun gnus-balloon-face-function (form type)
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`(gnus-put-text-property
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(point) (progn ,@form (point))
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,(if (fboundp 'balloon-help-mode)
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''balloon-help
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''help-echo)
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,(intern (format "gnus-balloon-face-%d" type))))
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(defun gnus-spec-tab (column)
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(if (> column 0)
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`(insert-char ? (max (- ,column (current-column)) 0))
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(let ((column (abs column)))
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`(if (> (current-column) ,column)
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(let ((end (point)))
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(if (= (move-to-column ,column) ,column)
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(delete-region (point) end)
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(delete-region (1- (point)) end)
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(insert " ")))
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(insert-char ? (max (- ,column (current-column)) 0))))))
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(defun gnus-correct-length (string)
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"Return the correct width of STRING."
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(apply #'+ (mapcar #'char-width string)))
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(defun gnus-correct-substring (string start &optional end)
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(let ((wstart 0)
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(wend 0)
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(wseek 0)
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(seek 0)
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(length (length string))
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(string (concat string "\0")))
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;; Find the start position.
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(while (and (< seek length)
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(< wseek start))
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(incf wseek (char-width (aref string seek)))
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(incf seek))
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(setq wstart seek)
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;; Find the end position.
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(while (and (<= seek length)
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(or (not end)
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(<= wseek end)))
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(incf wseek (char-width (aref string seek)))
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(incf seek))
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(setq wend seek)
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(substring string wstart (1- wend))))
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(defun gnus-string-width-function ()
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(cond
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(gnus-use-correct-string-widths
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'gnus-correct-length)
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((fboundp 'string-width)
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'string-width)
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(t
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'length)))
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(defun gnus-substring-function ()
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(cond
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(gnus-use-correct-string-widths
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'gnus-correct-substring)
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((fboundp 'string-width)
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'gnus-correct-substring)
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(t
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'substring)))
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(defun gnus-tilde-max-form (el max-width)
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"Return a form that limits EL to MAX-WIDTH."
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(let ((max (abs max-width))
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(length-fun (gnus-string-width-function))
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(substring-fun (gnus-substring-function)))
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(if (symbolp el)
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`(if (> (,length-fun ,el) ,max)
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,(if (< max-width 0)
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`(,substring-fun ,el (- (,length-fun ,el) ,max))
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`(,substring-fun ,el 0 ,max))
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,el)
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`(let ((val (eval ,el)))
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(if (> (,length-fun val) ,max)
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,(if (< max-width 0)
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`(,substring-fun val (- (,length-fun val) ,max))
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`(,substring-fun val 0 ,max))
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val)))))
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(defun gnus-tilde-cut-form (el cut-width)
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"Return a form that cuts CUT-WIDTH off of EL."
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(let ((cut (abs cut-width))
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(length-fun (gnus-string-width-function))
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(substring-fun (gnus-substring-function)))
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(if (symbolp el)
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`(if (> (,length-fun ,el) ,cut)
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,(if (< cut-width 0)
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`(,substring-fun ,el 0 (- (,length-fun ,el) ,cut))
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`(,substring-fun ,el ,cut))
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,el)
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`(let ((val (eval ,el)))
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(if (> (,length-fun val) ,cut)
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,(if (< cut-width 0)
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`(,substring-fun val 0 (- (,length-fun val) ,cut))
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`(,substring-fun val ,cut))
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val)))))
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(defun gnus-tilde-ignore-form (el ignore-value)
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"Return a form that is blank when EL is IGNORE-VALUE."
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(if (symbolp el)
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`(if (equal ,el ,ignore-value)
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"" ,el)
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`(let ((val (eval ,el)))
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(if (equal val ,ignore-value)
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"" val))))
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(defun gnus-pad-form (el pad-width)
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"Return a form that pads EL to PAD-WIDTH accounting for multi-column
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characters correctly. This is because `format' may pad to columns or to
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characters when given a pad value."
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(let ((pad (abs pad-width))
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(side (< 0 pad-width))
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(length-fun (gnus-string-width-function)))
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(if (symbolp el)
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`(let ((need (- ,pad (,length-fun ,el))))
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(if (> need 0)
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(concat ,(when side '(make-string need ?\ ))
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,el
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,(when (not side) '(make-string need ?\ )))
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,el))
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`(let* ((val (eval ,el))
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(need (- ,pad (,length-fun val))))
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(if (> need 0)
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(concat ,(when side '(make-string need ?\ ))
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val
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,(when (not side) '(make-string need ?\ )))
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val)))))
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(defun gnus-parse-format (format spec-alist &optional insert)
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;; This function parses the FORMAT string with the help of the
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;; SPEC-ALIST and returns a list that can be eval'ed to return the
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;; string. If the FORMAT string contains the specifiers %( and %)
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;; the text between them will have the mouse-face text property.
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;; If the FORMAT string contains the specifiers %[ and %], the text between
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;; them will have the balloon-help text property.
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(let ((case-fold-search nil))
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(if (string-match
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"\\`\\(.*\\)%[0-9]?[{(<28>]\\(.*\\)%[0-9]?[<5B>})]\\(.*\n?\\)\\'\\|%[-0-9]*=\\|%[-0-9]*\\*"
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format)
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(gnus-parse-complex-format format spec-alist)
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;; This is a simple format.
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(gnus-parse-simple-format format spec-alist insert))))
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(defun gnus-parse-complex-format (format spec-alist)
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(let ((cursor-spec nil))
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(save-excursion
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(gnus-set-work-buffer)
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(insert format)
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(goto-char (point-min))
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(while (re-search-forward "\"" nil t)
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(replace-match "\\\"" nil t))
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(goto-char (point-min))
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(insert "(\"")
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;; Convert all font specs into font spec lists.
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(while (re-search-forward "%\\([0-9]+\\)?\\([<5B><>{}()]\\)" nil t)
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(let ((number (if (match-beginning 1)
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(match-string 1) "0"))
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(delim (aref (match-string 2) 0)))
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(if (or (= delim ?\()
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(= delim ?\{)
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(= delim ?\<5C>))
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(replace-match (concat "\"("
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(cond ((= delim ?\() "mouse")
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((= delim ?\{) "face")
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(t "balloon"))
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" " number " \"")
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t t)
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(replace-match "\")\""))))
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(goto-char (point-max))
|
||
(insert "\")")
|
||
;; Convert point position commands.
|
||
(goto-char (point-min))
|
||
(let ((case-fold-search nil))
|
||
(while (re-search-forward "%\\([-0-9]+\\)?\\*" nil t)
|
||
(replace-match "\"(point)\"" t t)
|
||
(setq cursor-spec t)))
|
||
;; Convert TAB commands.
|
||
(goto-char (point-min))
|
||
(while (re-search-forward "%\\([-0-9]+\\)=" nil t)
|
||
(replace-match (format "\"(tab %s)\"" (match-string 1)) t t))
|
||
;; Convert the buffer into the spec.
|
||
(goto-char (point-min))
|
||
(let ((form (read (current-buffer))))
|
||
(if cursor-spec
|
||
`(let (gnus-position)
|
||
,@(gnus-complex-form-to-spec form spec-alist)
|
||
(if gnus-position
|
||
(gnus-put-text-property gnus-position (1+ gnus-position)
|
||
'gnus-position t)))
|
||
`(progn
|
||
,@(gnus-complex-form-to-spec form spec-alist)))))))
|
||
|
||
(defun gnus-complex-form-to-spec (form spec-alist)
|
||
(delq nil
|
||
(mapcar
|
||
(lambda (sform)
|
||
(cond
|
||
((stringp sform)
|
||
(gnus-parse-simple-format sform spec-alist t))
|
||
((eq (car sform) 'point)
|
||
'(setq gnus-position (point)))
|
||
((eq (car sform) 'tab)
|
||
(gnus-spec-tab (cadr sform)))
|
||
(t
|
||
(funcall (intern (format "gnus-%s-face-function" (car sform)))
|
||
(gnus-complex-form-to-spec (cddr sform) spec-alist)
|
||
(nth 1 sform)))))
|
||
form)))
|
||
|
||
|
||
(defun gnus-xmas-format (fstring &rest args)
|
||
"A version of `format' which preserves text properties.
|
||
|
||
Required for XEmacs, where the built in `format' function strips all text
|
||
properties from both the format string and any inserted strings.
|
||
|
||
Only supports the format sequence %s, and %% for inserting
|
||
literal % characters. A pad width and an optional - (to right pad)
|
||
are supported for %s."
|
||
(let ((re "%%\\|%\\(-\\)?\\([1-9][0-9]*\\)?s")
|
||
(n (length args)))
|
||
(with-temp-buffer
|
||
(insert fstring)
|
||
(goto-char (point-min))
|
||
(while (re-search-forward re nil t)
|
||
(goto-char (match-end 0))
|
||
(cond
|
||
((string= (match-string 0) "%%")
|
||
(delete-char -1))
|
||
(t
|
||
(if (null args)
|
||
(error 'wrong-number-of-arguments #'my-format n fstring))
|
||
(let* ((minlen (string-to-number (or (match-string 2) "")))
|
||
(arg (car args))
|
||
(str (if (stringp arg) arg (format "%s" arg)))
|
||
(lpad (null (match-string 1)))
|
||
(padlen (max 0 (- minlen (length str)))))
|
||
(replace-match "")
|
||
(if lpad (insert-char ?\ padlen))
|
||
(insert str)
|
||
(unless lpad (insert-char ?\ padlen))
|
||
(setq args (cdr args))))))
|
||
(buffer-string))))
|
||
|
||
(defun gnus-parse-simple-format (format spec-alist &optional insert)
|
||
;; This function parses the FORMAT string with the help of the
|
||
;; SPEC-ALIST and returns a list that can be eval'ed to return a
|
||
;; string.
|
||
(let ((max-width 0)
|
||
spec flist fstring elem result dontinsert user-defined
|
||
type value pad-width spec-beg cut-width ignore-value
|
||
tilde-form tilde elem-type extended-spec)
|
||
(save-excursion
|
||
(gnus-set-work-buffer)
|
||
(insert format)
|
||
(goto-char (point-min))
|
||
(while (re-search-forward "%" nil t)
|
||
(setq user-defined nil
|
||
spec-beg nil
|
||
pad-width nil
|
||
max-width nil
|
||
cut-width nil
|
||
ignore-value nil
|
||
tilde-form nil
|
||
extended-spec nil)
|
||
(setq spec-beg (1- (point)))
|
||
|
||
;; Parse this spec fully.
|
||
(while
|
||
(cond
|
||
((looking-at "\\([-.0-9]+\\)\\(,[-0-9]+\\)?")
|
||
(setq pad-width (string-to-number (match-string 1)))
|
||
(when (match-beginning 2)
|
||
(setq max-width (string-to-number (buffer-substring
|
||
(1+ (match-beginning 2))
|
||
(match-end 2)))))
|
||
(goto-char (match-end 0)))
|
||
((looking-at "~")
|
||
(forward-char 1)
|
||
(setq tilde (read (current-buffer))
|
||
type (car tilde)
|
||
value (cadr tilde))
|
||
(cond
|
||
((memq type '(pad pad-left))
|
||
(setq pad-width value))
|
||
((eq type 'pad-right)
|
||
(setq pad-width (- value)))
|
||
((memq type '(max-right max))
|
||
(setq max-width value))
|
||
((eq type 'max-left)
|
||
(setq max-width (- value)))
|
||
((memq type '(cut cut-left))
|
||
(setq cut-width value))
|
||
((eq type 'cut-right)
|
||
(setq cut-width (- value)))
|
||
((eq type 'ignore)
|
||
(setq ignore-value
|
||
(if (stringp value) value (format "%s" value))))
|
||
((eq type 'form)
|
||
(setq tilde-form value))
|
||
(t
|
||
(error "Unknown tilde type: %s" tilde)))
|
||
t)
|
||
(t
|
||
nil)))
|
||
(cond
|
||
;; User-defined spec -- find the spec name.
|
||
((eq (setq spec (char-after)) ?u)
|
||
(forward-char 1)
|
||
(when (and (eq (setq user-defined (char-after)) ?&)
|
||
(looking-at "&\\([^;]+\\);"))
|
||
(setq user-defined (match-string 1))
|
||
(goto-char (match-end 1))))
|
||
;; extended spec
|
||
((and (eq spec ?&) (looking-at "&\\([^;]+\\);"))
|
||
(setq extended-spec (intern (match-string 1)))
|
||
(goto-char (match-end 1))))
|
||
(forward-char 1)
|
||
(delete-region spec-beg (point))
|
||
|
||
;; Now we have all the relevant data on this spec, so
|
||
;; we start doing stuff.
|
||
(insert "%")
|
||
(if (eq spec ?%)
|
||
;; "%%" just results in a "%".
|
||
(insert "%")
|
||
(cond
|
||
;; Do tilde forms.
|
||
((eq spec ?@)
|
||
(setq elem (list tilde-form ?s)))
|
||
;; Treat user defined format specifiers specially.
|
||
(user-defined
|
||
(setq elem
|
||
(list
|
||
(list (intern (format
|
||
(if (stringp user-defined)
|
||
"gnus-user-format-function-%s"
|
||
"gnus-user-format-function-%c")
|
||
user-defined))
|
||
'gnus-tmp-header)
|
||
?s)))
|
||
;; Find the specification from `spec-alist'.
|
||
((setq elem (cdr (assq (or extended-spec spec) spec-alist))))
|
||
;; We used to use "%l" for displaying the grouplens score.
|
||
((eq spec ?l)
|
||
(setq elem '("" ?s)))
|
||
(t
|
||
(setq elem '("*" ?s))))
|
||
(setq elem-type (cadr elem))
|
||
;; Insert the new format elements.
|
||
(when (and pad-width
|
||
(not (and (featurep 'xemacs)
|
||
gnus-use-correct-string-widths)))
|
||
(insert (number-to-string pad-width)))
|
||
;; Create the form to be evaled.
|
||
(if (or max-width cut-width ignore-value
|
||
(and (featurep 'xemacs)
|
||
gnus-use-correct-string-widths))
|
||
(progn
|
||
(insert ?s)
|
||
(let ((el (car elem)))
|
||
(cond ((= (cadr elem) ?c)
|
||
(setq el (list 'char-to-string el)))
|
||
((= (cadr elem) ?d)
|
||
(setq el (list 'int-to-string el))))
|
||
(when ignore-value
|
||
(setq el (gnus-tilde-ignore-form el ignore-value)))
|
||
(when cut-width
|
||
(setq el (gnus-tilde-cut-form el cut-width)))
|
||
(when max-width
|
||
(setq el (gnus-tilde-max-form el max-width)))
|
||
(when pad-width
|
||
(setq el (gnus-pad-form el pad-width)))
|
||
(push el flist)))
|
||
(insert elem-type)
|
||
(push (car elem) flist))))
|
||
(setq fstring (buffer-substring-no-properties (point-min) (point-max))))
|
||
|
||
;; Do some postprocessing to increase efficiency.
|
||
(setq
|
||
result
|
||
(cond
|
||
;; Emptiness.
|
||
((string= fstring "")
|
||
nil)
|
||
;; Not a format string.
|
||
((not (string-match "%" fstring))
|
||
(list fstring))
|
||
;; A format string with just a single string spec.
|
||
((string= fstring "%s")
|
||
(list (car flist)))
|
||
;; A single character.
|
||
((string= fstring "%c")
|
||
(list (car flist)))
|
||
;; A single number.
|
||
((string= fstring "%d")
|
||
(setq dontinsert t)
|
||
(if insert
|
||
(list `(princ ,(car flist)))
|
||
(list `(int-to-string ,(car flist)))))
|
||
;; Just lots of chars and strings.
|
||
((string-match "\\`\\(%[cs]\\)+\\'" fstring)
|
||
(nreverse flist))
|
||
;; A single string spec at the beginning of the spec.
|
||
((string-match "\\`%[sc][^%]+\\'" fstring)
|
||
(list (car flist) (substring fstring 2)))
|
||
;; A single string spec in the middle of the spec.
|
||
((string-match "\\`\\([^%]+\\)%[sc]\\([^%]+\\)\\'" fstring)
|
||
(list (match-string 1 fstring) (car flist) (match-string 2 fstring)))
|
||
;; A single string spec in the end of the spec.
|
||
((string-match "\\`\\([^%]+\\)%[sc]\\'" fstring)
|
||
(list (match-string 1 fstring) (car flist)))
|
||
;; Only string (and %) specs (XEmacs only!)
|
||
((and (featurep 'xemacs)
|
||
gnus-make-format-preserve-properties
|
||
(string-match
|
||
"\\`\\([^%]*\\(%%\\|%-?\\([1-9][0-9]*\\)?s\\)\\)*[^%]*\\'"
|
||
fstring))
|
||
(list (cons 'gnus-xmas-format (cons fstring (nreverse flist)))))
|
||
;; A more complex spec.
|
||
(t
|
||
(list (cons 'format (cons fstring (nreverse flist)))))))
|
||
|
||
(if insert
|
||
(when result
|
||
(if dontinsert
|
||
result
|
||
(cons 'insert result)))
|
||
(cond ((stringp result)
|
||
result)
|
||
((consp result)
|
||
(cons 'concat result))
|
||
(t "")))))
|
||
|
||
(defun gnus-eval-format (format &optional alist props)
|
||
"Eval the format variable FORMAT, using ALIST.
|
||
If PROPS, insert the result."
|
||
(let ((form (gnus-parse-format format alist props)))
|
||
(if props
|
||
(gnus-add-text-properties (point) (progn (eval form) (point)) props)
|
||
(eval form))))
|
||
|
||
(defun gnus-compile ()
|
||
"Byte-compile the user-defined format specs."
|
||
(interactive)
|
||
(require 'bytecomp)
|
||
(let ((entries gnus-format-specs)
|
||
(byte-compile-warnings '(unresolved callargs redefine))
|
||
entry gnus-tmp-func)
|
||
(save-excursion
|
||
(gnus-message 7 "Compiling format specs...")
|
||
|
||
(while entries
|
||
(setq entry (pop entries))
|
||
(if (memq (car entry) '(gnus-version version))
|
||
(setq gnus-format-specs (delq entry gnus-format-specs))
|
||
(let ((form (caddr entry)))
|
||
(when (and (listp form)
|
||
;; Under GNU Emacs, it's (byte-code ...)
|
||
(not (eq 'byte-code (car form)))
|
||
;; Under XEmacs, it's (funcall #<compiled-function ...>)
|
||
(not (and (eq 'funcall (car form))
|
||
(byte-code-function-p (cadr form)))))
|
||
(defalias 'gnus-tmp-func `(lambda () ,form))
|
||
(byte-compile 'gnus-tmp-func)
|
||
(setcar (cddr entry) (gnus-byte-code 'gnus-tmp-func))))))
|
||
|
||
(push (cons 'version emacs-version) gnus-format-specs)
|
||
;; Mark the .newsrc.eld file as "dirty".
|
||
(gnus-dribble-touch)
|
||
(gnus-message 7 "Compiling user specs...done"))))
|
||
|
||
(defun gnus-set-format (type &optional insertable)
|
||
(set (intern (format "gnus-%s-line-format-spec" type))
|
||
(gnus-parse-format
|
||
(symbol-value (intern (format "gnus-%s-line-format" type)))
|
||
(symbol-value (intern (format "gnus-%s-line-format-alist" type)))
|
||
insertable)))
|
||
|
||
(provide 'gnus-spec)
|
||
|
||
;; Local Variables:
|
||
;; coding: iso-8859-1
|
||
;; End:
|
||
|
||
;; arch-tag: a4328fa1-1f84-4b09-97ad-4b5767cfd50f
|
||
;;; gnus-spec.el ends here
|