lisp/gnus/gnus-ems.el

   1 ;;; gnus-ems.el --- functions for making Gnus work under different Emacsen
   2 ;; Copyright (C) 1995,96,97 Free Software Foundation, Inc.
   3
   4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
   5 ;; Keywords: news
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation; either version 2, or (at your option)
  12 ;; any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 ;; Boston, MA 02111-1307, USA.
  23
  24 ;;; Commentary:
  25
  26 ;;; Code:
  27
  28 (eval-when-compile (require 'cl))
  29
  30 ;;; Function aliases later to be redefined for XEmacs usage.
  31
  32 (defvar gnus-xemacs (string-match "XEmacs\\|Lucid" emacs-version)
  33   "Non-nil if running under XEmacs.")
  34
  35 (defvar gnus-mouse-2 [mouse-2])
  36 (defvar gnus-down-mouse-2 [down-mouse-2])
  37
  38 (eval-and-compile
  39   (autoload 'gnus-xmas-define "gnus-xmas")
  40   (autoload 'gnus-xmas-redefine "gnus-xmas")
  41   (autoload 'appt-select-lowest-window "appt.el"))
  42
  43 (or (fboundp 'mail-file-babyl-p)
  44     (fset 'mail-file-babyl-p 'rmail-file-p))
  45
  46 ;;; Mule functions.
  47
  48 (defun gnus-mule-cite-add-face (number prefix face)
  49   ;; At line NUMBER, ignore PREFIX and add FACE to the rest of the line.
  50   (when face
  51     (let ((inhibit-point-motion-hooks t)
  52           from to)
  53       (goto-line number)
  54       (if (boundp 'MULE)
  55           (forward-char (chars-in-string prefix))
  56         (forward-char (length prefix)))
  57       (skip-chars-forward " \t")
  58       (setq from (point))
  59       (end-of-line 1)
  60       (skip-chars-backward " \t")
  61       (setq to (point))
  62       (when (< from to)
  63         (gnus-overlay-put (gnus-make-overlay from to) 'face face)))))
  64
  65 (defun gnus-mule-max-width-function (el max-width)
  66   (` (let* ((val (eval (, el)))
  67             (valstr (if (numberp val)
  68                         (int-to-string val) val)))
  69        (if (> (length valstr) (, max-width))
  70            (truncate-string valstr (, max-width))
  71          valstr))))
  72
  73 (eval-and-compile
  74   (if (string-match "XEmacs\\|Lucid" emacs-version)
  75       nil
  76
  77     (defvar gnus-mouse-face-prop 'mouse-face
  78       "Property used for highlighting mouse regions.")
  79
  80     (defvar gnus-article-x-face-command
  81       "{ echo '/* Width=48, Height=48 */'; uncompface; } | icontopbm | xv -quit -"
  82       "String or function to be executed to display an X-Face header.
  83 If it is a string, the command will be executed in a sub-shell
  84 asynchronously.  The compressed face will be piped to this command."))
  85
  86   (cond
  87    ((string-match "XEmacs\\|Lucid" emacs-version)
  88     (gnus-xmas-define))
  89
  90    ((or (not (boundp 'emacs-minor-version))
  91         (< emacs-minor-version 30))
  92     ;; Remove the `intangible' prop.
  93     (let ((props (and (boundp 'gnus-hidden-properties)
  94                       gnus-hidden-properties)))
  95       (while (and props (not (eq (car (cdr props)) 'intangible)))
  96         (setq props (cdr props)))
  97       (when props
  98         (setcdr props (cdr (cdr (cdr props))))))
  99     (unless (fboundp 'buffer-substring-no-properties)
 100       (defun buffer-substring-no-properties (beg end)
 101         (format "%s" (buffer-substring beg end)))))
 102
 103    ((boundp 'MULE)
 104     (provide 'gnusutil))))
 105
 106 (eval-and-compile
 107   (cond
 108    ((not window-system)
 109     (defun gnus-dummy-func (&rest args))
 110     (let ((funcs '(mouse-set-point set-face-foreground
 111                                    set-face-background x-popup-menu)))
 112       (while funcs
 113         (unless (fboundp (car funcs))
 114           (fset (car funcs) 'gnus-dummy-func))
 115         (setq funcs (cdr funcs))))))
 116   (unless (fboundp 'file-regular-p)
 117     (defun file-regular-p (file)
 118       (and (not (file-directory-p file))
 119            (not (file-symlink-p file))
 120            (file-exists-p file))))
 121   (unless (fboundp 'face-list)
 122     (defun face-list (&rest args))))
 123
 124 (eval-and-compile
 125   (let ((case-fold-search t))
 126     (cond
 127      ((string-match "windows-nt\\|os/2\\|emx" (format "%s" system-type))
 128       (setq nnheader-file-name-translation-alist
 129             (append nnheader-file-name-translation-alist
 130                     '((?: . ?_)
 131                       (?+ . ?-))))))))
 132
 133 (defvar gnus-tmp-unread)
 134 (defvar gnus-tmp-replied)
 135 (defvar gnus-tmp-score-char)
 136 (defvar gnus-tmp-indentation)
 137 (defvar gnus-tmp-opening-bracket)
 138 (defvar gnus-tmp-lines)
 139 (defvar gnus-tmp-name)
 140 (defvar gnus-tmp-closing-bracket)
 141 (defvar gnus-tmp-subject-or-nil)
 142
 143 (defun gnus-ems-redefine ()
 144   (cond
 145    ((string-match "XEmacs\\|Lucid" emacs-version)
 146     (gnus-xmas-redefine))
 147
 148    ((featurep 'mule)
 149     ;; Mule and new Emacs definitions
 150
 151     ;; [Note] Now there are three kinds of mule implementations,
 152     ;; original MULE, XEmacs/mule and beta version of Emacs including
 153     ;; some mule features. Unfortunately these API are different. In
 154     ;; particular, Emacs (including original MULE) and XEmacs are
 155     ;; quite different.
 156     ;; Predicates to check are following:
 157     ;; (boundp 'MULE) is t only if MULE (original; anything older than
 158     ;;                     Mule 2.3) is running.
 159     ;; (featurep 'mule) is t when every mule variants are running.
 160
 161     ;; These implementations may be able to share between original
 162     ;; MULE and beta version of new Emacs. In addition, it is able to
 163     ;; detect XEmacs/mule by (featurep 'mule) and to check variable
 164     ;; `emacs-version'. In this case, implementation for XEmacs/mule
 165     ;; may be able to share between XEmacs and XEmacs/mule.
 166
 167     (defalias 'gnus-truncate-string 'truncate-string)
 168
 169     (defvar gnus-summary-display-table nil
 170       "Display table used in summary mode buffers.")
 171     (fset 'gnus-cite-add-face 'gnus-mule-cite-add-face)
 172     (fset 'gnus-max-width-function 'gnus-mule-max-width-function)
 173     (fset 'gnus-summary-set-display-table 'ignore)
 174
 175     (when (boundp 'gnus-check-before-posting)
 176       (setq gnus-check-before-posting
 177             (delq 'long-lines
 178                   (delq 'control-chars gnus-check-before-posting))))
 179
 180     (defun gnus-summary-line-format-spec ()
 181       (insert gnus-tmp-unread gnus-tmp-replied
 182               gnus-tmp-score-char gnus-tmp-indentation)
 183       (put-text-property
 184        (point)
 185        (progn
 186          (insert
 187           gnus-tmp-opening-bracket
 188           (format "%4d: %-20s"
 189                   gnus-tmp-lines
 190                   (if (> (length gnus-tmp-name) 20)
 191                       (truncate-string gnus-tmp-name 20)
 192                     gnus-tmp-name))
 193           gnus-tmp-closing-bracket)
 194          (point))
 195        gnus-mouse-face-prop gnus-mouse-face)
 196       (insert " " gnus-tmp-subject-or-nil "\n"))
 197     )))
 198
 199 (defun gnus-region-active-p ()
 200   "Say whether the region is active."
 201   (and (boundp 'transient-mark-mode)
 202        transient-mark-mode
 203        (boundp 'mark-active)
 204        mark-active))
 205
 206 (provide 'gnus-ems)
 207
 208 ;; Local Variables:
 209 ;; byte-compile-warnings: '(redefine callargs)
 210 ;; End:
 211
 212 ;;; gnus-ems.el ends here