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 (defvar gnus-mode-line-modified
  38   (if (or gnus-xemacs
  39           (< emacs-major-version 20))
  40       '("--**-" . "-----")
  41     '("**" "--")))
  42
  43 (eval-and-compile
  44   (autoload 'gnus-xmas-define "gnus-xmas")
  45   (autoload 'gnus-xmas-redefine "gnus-xmas")
  46   (autoload 'appt-select-lowest-window "appt"))
  47
  48 (or (fboundp 'mail-file-babyl-p)
  49     (fset 'mail-file-babyl-p 'rmail-file-p))
  50
  51 ;;; Mule functions.
  52
  53 (defun gnus-mule-cite-add-face (number prefix face)
  54   ;; At line NUMBER, ignore PREFIX and add FACE to the rest of the line.
  55   (when face
  56     (let ((inhibit-point-motion-hooks t)
  57           from to)
  58       (goto-line number)
  59       (if (boundp 'MULE)
  60           (forward-char (chars-in-string prefix))
  61         (forward-char (length prefix)))
  62       (skip-chars-forward " \t")
  63       (setq from (point))
  64       (end-of-line 1)
  65       (skip-chars-backward " \t")
  66       (setq to (point))
  67       (when (< from to)
  68         (gnus-overlay-put (gnus-make-overlay from to) 'face face)))))
  69
  70 (defun gnus-mule-max-width-function (el max-width)
  71   (` (let* ((val (eval (, el)))
  72             (valstr (if (numberp val)
  73                         (int-to-string val) val)))
  74        (if (> (length valstr) (, max-width))
  75            (truncate-string valstr (, max-width))
  76          valstr))))
  77
  78 (defun gnus-encode-coding-string (string system)
  79   string)
  80
  81 (eval-and-compile
  82   (if (string-match "XEmacs\\|Lucid" emacs-version)
  83       nil
  84
  85     (defvar gnus-mouse-face-prop 'mouse-face
  86       "Property used for highlighting mouse regions."))
  87
  88   (cond
  89    ((string-match "XEmacs\\|Lucid" emacs-version)
  90     (gnus-xmas-define))
  91
  92    ((or (not (boundp 'emacs-minor-version))
  93         (< emacs-minor-version 30))
  94     ;; Remove the `intangible' prop.
  95     (let ((props (and (boundp 'gnus-hidden-properties)
  96                       gnus-hidden-properties)))
  97       (while (and props (not (eq (car (cdr props)) 'intangible)))
  98         (setq props (cdr props)))
  99       (when props
 100         (setcdr props (cdr (cdr (cdr props))))))
 101     (unless (fboundp 'buffer-substring-no-properties)
 102       (defun buffer-substring-no-properties (beg end)
 103         (format "%s" (buffer-substring beg end)))))
 104
 105    ((boundp 'MULE)
 106     (provide 'gnusutil))))
 107
 108 (eval-and-compile
 109   (cond
 110    ((not window-system)
 111     (defun gnus-dummy-func (&rest args))
 112     (let ((funcs '(mouse-set-point set-face-foreground
 113                                    set-face-background x-popup-menu)))
 114       (while funcs
 115         (unless (fboundp (car funcs))
 116           (fset (car funcs) 'gnus-dummy-func))
 117         (setq funcs (cdr funcs))))))
 118   (unless (fboundp 'file-regular-p)
 119     (defun file-regular-p (file)
 120       (and (not (file-directory-p file))
 121            (not (file-symlink-p file))
 122            (file-exists-p file))))
 123   (unless (fboundp 'face-list)
 124     (defun face-list (&rest args))))
 125
 126 (eval-and-compile
 127   (let ((case-fold-search t))
 128     (cond
 129      ((string-match "windows-nt\\|os/2\\|emx" (format "%s" system-type))
 130       (setq nnheader-file-name-translation-alist
 131             (append nnheader-file-name-translation-alist
 132                     '((?: . ?_)
 133                       (?+ . ?-))))))))
 134
 135 (defvar gnus-tmp-unread)
 136 (defvar gnus-tmp-replied)
 137 (defvar gnus-tmp-score-char)
 138 (defvar gnus-tmp-indentation)
 139 (defvar gnus-tmp-opening-bracket)
 140 (defvar gnus-tmp-lines)
 141 (defvar gnus-tmp-name)
 142 (defvar gnus-tmp-closing-bracket)
 143 (defvar gnus-tmp-subject-or-nil)
 144
 145 (defun gnus-ems-redefine ()
 146   (cond
 147    ((string-match "XEmacs\\|Lucid" emacs-version)
 148     (gnus-xmas-redefine))
 149
 150    ((featurep 'mule)
 151     ;; Mule and new Emacs definitions
 152
 153     ;; [Note] Now there are three kinds of mule implementations,
 154     ;; original MULE, XEmacs/mule and beta version of Emacs including
 155     ;; some mule features. Unfortunately these API are different. In
 156     ;; particular, Emacs (including original MULE) and XEmacs are
 157     ;; quite different.
 158     ;; Predicates to check are following:
 159     ;; (boundp 'MULE) is t only if MULE (original; anything older than
 160     ;;                     Mule 2.3) is running.
 161     ;; (featurep 'mule) is t when every mule variants are running.
 162
 163     ;; These implementations may be able to share between original
 164     ;; MULE and beta version of new Emacs. In addition, it is able to
 165     ;; detect XEmacs/mule by (featurep 'mule) and to check variable
 166     ;; `emacs-version'. In this case, implementation for XEmacs/mule
 167     ;; may be able to share between XEmacs and XEmacs/mule.
 168
 169     (defalias 'gnus-truncate-string 'truncate-string)
 170
 171     (defvar gnus-summary-display-table nil
 172       "Display table used in summary mode buffers.")
 173     (fset 'gnus-cite-add-face 'gnus-mule-cite-add-face)
 174     (fset 'gnus-max-width-function 'gnus-mule-max-width-function)
 175     (fset 'gnus-summary-set-display-table 'ignore)
 176     (fset 'gnus-encode-coding-string 'encode-coding-string)
 177
 178     (when (boundp 'gnus-check-before-posting)
 179       (setq gnus-check-before-posting
 180             (delq 'long-lines
 181                   (delq 'control-chars gnus-check-before-posting))))
 182
 183     (defun gnus-summary-line-format-spec ()
 184       (insert gnus-tmp-unread gnus-tmp-replied
 185               gnus-tmp-score-char gnus-tmp-indentation)
 186       (put-text-property
 187        (point)
 188        (progn
 189          (insert
 190           gnus-tmp-opening-bracket
 191           (format "%4d: %-20s"
 192                   gnus-tmp-lines
 193                   (if (> (length gnus-tmp-name) 20)
 194                       (truncate-string gnus-tmp-name 20)
 195                     gnus-tmp-name))
 196           gnus-tmp-closing-bracket)
 197          (point))
 198        gnus-mouse-face-prop gnus-mouse-face)
 199       (insert " " gnus-tmp-subject-or-nil "\n"))
 200     )))
 201
 202 (defun gnus-region-active-p ()
 203   "Say whether the region is active."
 204   (and (boundp 'transient-mark-mode)
 205        transient-mark-mode
 206        (boundp 'mark-active)
 207        mark-active))
 208
 209 (defun gnus-add-minor-mode (mode name map)
 210   (if (fboundp 'add-minor-mode)
 211       (add-minor-mode mode name map)
 212     (unless (assq mode minor-mode-alist)
 213       (push `(,mode ,name) minor-mode-alist))
 214     (unless (assq mode minor-mode-map-alist)
 215       (push (cons mode map)
 216             minor-mode-map-alist))))
 217
 218 (provide 'gnus-ems)
 219
 220 ;; Local Variables:
 221 ;; byte-compile-warnings: '(redefine callargs)
 222 ;; End:
 223
 224 ;;; gnus-ems.el ends here