[bpt/emacs.git] / lisp / gnus / gnus-ems.el

;;; gnus-ems.el --- functions for making Gnus work under different Emacsen
;; Copyright (C) 1995,96,97,98 Free Software Foundation, Inc.

;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: news

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;;; Code:

(eval-when-compile (require 'cl))

;;; Function aliases later to be redefined for XEmacs usage.

(defvar gnus-xemacs (string-match "XEmacs\\|Lucid" emacs-version)
  "Non-nil if running under XEmacs.")

(defvar gnus-mouse-2 [mouse-2])
(defvar gnus-down-mouse-2 [down-mouse-2])
(defvar gnus-mode-line-modified
  (if (or gnus-xemacs
	  (< emacs-major-version 20))
      '("--**-" . "-----")
    '("**" "--")))

(eval-and-compile
  (autoload 'gnus-xmas-define "gnus-xmas")
  (autoload 'gnus-xmas-redefine "gnus-xmas")
  (autoload 'appt-select-lowest-window "appt"))

(or (fboundp 'mail-file-babyl-p)
    (fset 'mail-file-babyl-p 'rmail-file-p))

;;; Mule functions.

(defun gnus-mule-cite-add-face (number prefix face)
  ;; At line NUMBER, ignore PREFIX and add FACE to the rest of the line.
  (when face
    (let ((inhibit-point-motion-hooks t)
	  from to)
      (goto-line number)
      (unless (eobp)            ; Sometimes things become confused (broken).
        (if (boundp 'MULE)
            (forward-char (chars-in-string prefix))
          (forward-char (length prefix)))
        (skip-chars-forward " \t")
        (setq from (point))
        (end-of-line 1)
        (skip-chars-backward " \t")
        (setq to (point))
        (when (< from to)
          (push (setq overlay (gnus-make-overlay from to))
                gnus-cite-overlay-list)
          (gnus-overlay-put (gnus-make-overlay from to) 'face face))))))

(defun gnus-mule-max-width-function (el max-width)
  (` (let* ((val (eval (, el)))
	    (valstr (if (numberp val)
			(int-to-string val) val)))
       (if (> (length valstr) (, max-width))
	   (truncate-string valstr (, max-width))
	 valstr))))

(defun gnus-encode-coding-string (string system)
  string)

(defun gnus-decode-coding-string (string system)
  string)

(defun gnus-encode-coding-string (string system)
  string)

(eval-and-compile
  (if (string-match "XEmacs\\|Lucid" emacs-version)
      nil

    (defvar gnus-mouse-face-prop 'mouse-face
      "Property used for highlighting mouse regions."))

  (cond
   ((string-match "XEmacs\\|Lucid" emacs-version)
    (gnus-xmas-define))

   ((or (not (boundp 'emacs-minor-version))
	(and (< emacs-major-version 20)
	     (< emacs-minor-version 30)))
    ;; Remove the `intangible' prop.
    (let ((props (and (boundp 'gnus-hidden-properties)
		      gnus-hidden-properties)))
      (while (and props (not (eq (car (cdr props)) 'intangible)))
	(setq props (cdr props)))
      (when props
	(setcdr props (cdr (cdr (cdr props))))))
    (unless (fboundp 'buffer-substring-no-properties)
      (defun buffer-substring-no-properties (beg end)
	(format "%s" (buffer-substring beg end)))))

   ((boundp 'MULE)
    (provide 'gnusutil))))

(eval-and-compile
  (cond
   ((not window-system)
    (defun gnus-dummy-func (&rest args))
    (let ((funcs '(mouse-set-point set-face-foreground
				   set-face-background x-popup-menu)))
      (while funcs
	(unless (fboundp (car funcs))
	  (fset (car funcs) 'gnus-dummy-func))
	(setq funcs (cdr funcs))))))
  (unless (fboundp 'file-regular-p)
    (defun file-regular-p (file)
      (and (not (file-directory-p file))
	   (not (file-symlink-p file))
	   (file-exists-p file))))
  (unless (fboundp 'face-list)
    (defun face-list (&rest args))))

(eval-and-compile
  (let ((case-fold-search t))
    (cond
     ((string-match "windows-nt\\|os/2\\|emx\\|cygwin"
		    (symbol-name system-type))
      (setq nnheader-file-name-translation-alist
	    (append nnheader-file-name-translation-alist
		    '((?: . ?_)
		      (?+ . ?-))))))))

(defvar gnus-tmp-unread)
(defvar gnus-tmp-replied)
(defvar gnus-tmp-score-char)
(defvar gnus-tmp-indentation)
(defvar gnus-tmp-opening-bracket)
(defvar gnus-tmp-lines)
(defvar gnus-tmp-name)
(defvar gnus-tmp-closing-bracket)
(defvar gnus-tmp-subject-or-nil)

(defun gnus-ems-redefine ()
  (cond
   ((string-match "XEmacs\\|Lucid" emacs-version)
    (gnus-xmas-redefine))

   ((featurep 'mule)
    ;; Mule and new Emacs definitions

    ;; [Note] Now there are three kinds of mule implementations,
    ;; original MULE, XEmacs/mule and beta version of Emacs including
    ;; some mule features. Unfortunately these API are different. In
    ;; particular, Emacs (including original MULE) and XEmacs are
    ;; quite different.
    ;; Predicates to check are following:
    ;; (boundp 'MULE) is t only if MULE (original; anything older than
    ;;                     Mule 2.3) is running.
    ;; (featurep 'mule) is t when every mule variants are running.

    ;; These implementations may be able to share between original
    ;; MULE and beta version of new Emacs. In addition, it is able to
    ;; detect XEmacs/mule by (featurep 'mule) and to check variable
    ;; `emacs-version'. In this case, implementation for XEmacs/mule
    ;; may be able to share between XEmacs and XEmacs/mule.

    (defalias 'gnus-truncate-string 'truncate-string)

    (defvar gnus-summary-display-table nil
      "Display table used in summary mode buffers.")
    (fset 'gnus-cite-add-face 'gnus-mule-cite-add-face)
    (fset 'gnus-max-width-function 'gnus-mule-max-width-function)
    (fset 'gnus-summary-set-display-table (lambda ()))
    (fset 'gnus-encode-coding-string 'encode-coding-string)
    (fset 'gnus-decode-coding-string 'decode-coding-string)

    (when (boundp 'gnus-check-before-posting)
      (setq gnus-check-before-posting
	    (delq 'long-lines
		  (delq 'control-chars gnus-check-before-posting))))

    (defun gnus-summary-line-format-spec ()
      (insert gnus-tmp-unread gnus-tmp-replied
	      gnus-tmp-score-char gnus-tmp-indentation)
      (put-text-property
       (point)
       (progn
	 (insert
	  gnus-tmp-opening-bracket
	  (format "%4d: %-20s"
		  gnus-tmp-lines
		  (if (> (length gnus-tmp-name) 20)
		      (truncate-string gnus-tmp-name 20)
		    gnus-tmp-name))
	  gnus-tmp-closing-bracket)
	 (point))
       gnus-mouse-face-prop gnus-mouse-face)
      (insert " " gnus-tmp-subject-or-nil "\n"))

    (when (and (boundp 'enable-multibyte-characters)
	       enable-multibyte-characters)
      (require 'gnus-mule)
      (gnus-mule-initialize))
    )))

(defun gnus-region-active-p ()
  "Say whether the region is active."
  (and (boundp 'transient-mark-mode)
       transient-mark-mode
       (boundp 'mark-active)
       mark-active))

(defun gnus-add-minor-mode (mode name map)
  (if (fboundp 'add-minor-mode)
      (add-minor-mode mode name map)
    (set (make-local-variable mode) t)
    (unless (assq mode minor-mode-alist)
      (push `(,mode ,name) minor-mode-alist))
    (unless (assq mode minor-mode-map-alist)
      (push (cons mode map)
	    minor-mode-map-alist))))

(defun gnus-x-splash ()
  "Show a splash screen using a pixmap in the current buffer."
  (let ((dir (nnheader-find-etc-directory "gnus"))
	pixmap file height beg i)
    (save-excursion
      (switch-to-buffer (gnus-get-buffer-create gnus-group-buffer))
      (let ((buffer-read-only nil))
	(erase-buffer)
	(when (and dir
		   (file-exists-p (setq file (concat dir "x-splash"))))
	  (nnheader-temp-write nil
	    (insert-file-contents file)
	    (goto-char (point-min))
	    (ignore-errors
	      (setq pixmap (read (current-buffer))))))
	(when pixmap
	  (erase-buffer)
	  (unless (facep 'gnus-splash)
	    (make-face 'gnus-splash))
	  (setq height (/ (car pixmap) (frame-char-height))
		width (/ (cadr pixmap) (frame-char-width)))
	  (set-face-foreground 'gnus-splash "ForestGreen")
	  (set-face-stipple 'gnus-splash pixmap)
	  (insert-char ?\n (* (/ (window-height) 2 height) height))
	  (setq i height)
	  (while (> i 0)
	    (insert-char ?  (* (+ (/ (window-width) 2 width) 1) width))
	    (setq beg (point))
	    (insert-char ?  width)
	    (set-text-properties beg (point) '(face gnus-splash))
	    (insert "\n")
	    (decf i))
	  (goto-char (point-min))
	  (sit-for 0))))))

(if (fboundp 'split-string)
    (fset 'gnus-split-string 'split-string)
  (defun gnus-split-string (string pattern)
    "Return a list of substrings of STRING which are separated by PATTERN."
    (let (parts (start 0))
      (while (string-match pattern string start)
	(setq parts (cons (substring string start (match-beginning 0)) parts)
	      start (match-end 0)))
      (nreverse (cons (substring string start) parts)))))

(provide 'gnus-ems)

;; Local Variables:
;; byte-compile-warnings: '(redefine callargs)
;; End:

;;; gnus-ems.el ends here
Commit	Line	Data
eec82323	1	;;; gnus-ems.el --- functions for making Gnus work under different Emacsen
6748645f	2	;; Copyright (C) 1995,96,97,98 Free Software Foundation, Inc.
eec82323	3
6748645f	4	;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
eec82323 LMI	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])
a8151ef7 LMI	37	(defvar gnus-mode-line-modified
	38	(if (or gnus-xemacs
	39	(< emacs-major-version 20))
	40	'("--**-" . "-----")
	41	'("**" "--")))
eec82323 LMI	42
	43	(eval-and-compile
	44	(autoload 'gnus-xmas-define "gnus-xmas")
	45	(autoload 'gnus-xmas-redefine "gnus-xmas")
a8151ef7	46	(autoload 'appt-select-lowest-window "appt"))
eec82323 LMI	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)
6748645f LMI	59	(unless (eobp) ; Sometimes things become confused (broken).
	60	(if (boundp 'MULE)
	61	(forward-char (chars-in-string prefix))
	62	(forward-char (length prefix)))
	63	(skip-chars-forward " \t")
	64	(setq from (point))
	65	(end-of-line 1)
	66	(skip-chars-backward " \t")
	67	(setq to (point))
	68	(when (< from to)
	69	(push (setq overlay (gnus-make-overlay from to))
	70	gnus-cite-overlay-list)
	71	(gnus-overlay-put (gnus-make-overlay from to) 'face face))))))
eec82323 LMI	72
	73	(defun gnus-mule-max-width-function (el max-width)
	74	(` (let* ((val (eval (, el)))
	75	(valstr (if (numberp val)
	76	(int-to-string val) val)))
	77	(if (> (length valstr) (, max-width))
	78	(truncate-string valstr (, max-width))
	79	valstr))))
	80
a8151ef7 LMI	81	(defun gnus-encode-coding-string (string system)
	82	string)
	83
6748645f LMI	84	(defun gnus-decode-coding-string (string system)
	85	string)
	86
	87	(defun gnus-encode-coding-string (string system)
	88	string)
	89
eec82323 LMI	90	(eval-and-compile
	91	(if (string-match "XEmacs\\\|Lucid" emacs-version)
	92	nil
	93
	94	(defvar gnus-mouse-face-prop 'mouse-face
a8151ef7	95	"Property used for highlighting mouse regions."))
eec82323 LMI	96
	97	(cond
	98	((string-match "XEmacs\\\|Lucid" emacs-version)
	99	(gnus-xmas-define))
	100
	101	((or (not (boundp 'emacs-minor-version))
6748645f LMI	102	(and (< emacs-major-version 20)
6748645f LMI	103	(< emacs-minor-version 30)))
eec82323 LMI	104	;; Remove the `intangible' prop.
	105	(let ((props (and (boundp 'gnus-hidden-properties)
	106	gnus-hidden-properties)))
	107	(while (and props (not (eq (car (cdr props)) 'intangible)))
	108	(setq props (cdr props)))
	109	(when props
	110	(setcdr props (cdr (cdr (cdr props))))))
	111	(unless (fboundp 'buffer-substring-no-properties)
	112	(defun buffer-substring-no-properties (beg end)
	113	(format "%s" (buffer-substring beg end)))))
	114
	115	((boundp 'MULE)
	116	(provide 'gnusutil))))
	117
	118	(eval-and-compile
	119	(cond
	120	((not window-system)
	121	(defun gnus-dummy-func (&rest args))
	122	(let ((funcs '(mouse-set-point set-face-foreground
	123	set-face-background x-popup-menu)))
	124	(while funcs
	125	(unless (fboundp (car funcs))
	126	(fset (car funcs) 'gnus-dummy-func))
	127	(setq funcs (cdr funcs))))))
	128	(unless (fboundp 'file-regular-p)
	129	(defun file-regular-p (file)
	130	(and (not (file-directory-p file))
	131	(not (file-symlink-p file))
	132	(file-exists-p file))))
	133	(unless (fboundp 'face-list)
	134	(defun face-list (&rest args))))
	135
	136	(eval-and-compile
	137	(let ((case-fold-search t))
	138	(cond
6748645f LMI	139	((string-match "windows-nt\\\|os/2\\\|emx\\\|cygwin"
6748645f LMI	140	(symbol-name system-type))
eec82323 LMI	141	(setq nnheader-file-name-translation-alist
	142	(append nnheader-file-name-translation-alist
	143	'((?: . ?_)
	144	(?+ . ?-))))))))
	145
	146	(defvar gnus-tmp-unread)
	147	(defvar gnus-tmp-replied)
	148	(defvar gnus-tmp-score-char)
	149	(defvar gnus-tmp-indentation)
	150	(defvar gnus-tmp-opening-bracket)
	151	(defvar gnus-tmp-lines)
	152	(defvar gnus-tmp-name)
	153	(defvar gnus-tmp-closing-bracket)
	154	(defvar gnus-tmp-subject-or-nil)
	155
	156	(defun gnus-ems-redefine ()
	157	(cond
	158	((string-match "XEmacs\\\|Lucid" emacs-version)
	159	(gnus-xmas-redefine))
	160
	161	((featurep 'mule)
	162	;; Mule and new Emacs definitions
	163
	164	;; [Note] Now there are three kinds of mule implementations,
	165	;; original MULE, XEmacs/mule and beta version of Emacs including
	166	;; some mule features. Unfortunately these API are different. In
	167	;; particular, Emacs (including original MULE) and XEmacs are
	168	;; quite different.
	169	;; Predicates to check are following:
	170	;; (boundp 'MULE) is t only if MULE (original; anything older than
	171	;; Mule 2.3) is running.
	172	;; (featurep 'mule) is t when every mule variants are running.
	173
	174	;; These implementations may be able to share between original
	175	;; MULE and beta version of new Emacs. In addition, it is able to
	176	;; detect XEmacs/mule by (featurep 'mule) and to check variable
	177	;; `emacs-version'. In this case, implementation for XEmacs/mule
	178	;; may be able to share between XEmacs and XEmacs/mule.
	179
	180	(defalias 'gnus-truncate-string 'truncate-string)
	181
	182	(defvar gnus-summary-display-table nil
	183	"Display table used in summary mode buffers.")
	184	(fset 'gnus-cite-add-face 'gnus-mule-cite-add-face)
	185	(fset 'gnus-max-width-function 'gnus-mule-max-width-function)
6748645f	186	(fset 'gnus-summary-set-display-table (lambda ()))
a8151ef7	187	(fset 'gnus-encode-coding-string 'encode-coding-string)
6748645f	188	(fset 'gnus-decode-coding-string 'decode-coding-string)
eec82323 LMI	189
	190	(when (boundp 'gnus-check-before-posting)
	191	(setq gnus-check-before-posting
	192	(delq 'long-lines
	193	(delq 'control-chars gnus-check-before-posting))))
	194
	195	(defun gnus-summary-line-format-spec ()
	196	(insert gnus-tmp-unread gnus-tmp-replied
	197	gnus-tmp-score-char gnus-tmp-indentation)
	198	(put-text-property
	199	(point)
	200	(progn
	201	(insert
	202	gnus-tmp-opening-bracket
	203	(format "%4d: %-20s"
	204	gnus-tmp-lines
	205	(if (> (length gnus-tmp-name) 20)
	206	(truncate-string gnus-tmp-name 20)
	207	gnus-tmp-name))
	208	gnus-tmp-closing-bracket)
	209	(point))
	210	gnus-mouse-face-prop gnus-mouse-face)
	211	(insert " " gnus-tmp-subject-or-nil "\n"))
3c22558d	212
40166464 KH	213	(when (and (boundp 'enable-multibyte-characters)
	214	enable-multibyte-characters)
	215	(require 'gnus-mule)
	216	(gnus-mule-initialize))
eec82323 LMI	217	)))
	218
	219	(defun gnus-region-active-p ()
	220	"Say whether the region is active."
	221	(and (boundp 'transient-mark-mode)
	222	transient-mark-mode
	223	(boundp 'mark-active)
	224	mark-active))
	225
a8151ef7 LMI	226	(defun gnus-add-minor-mode (mode name map)
	227	(if (fboundp 'add-minor-mode)
	228	(add-minor-mode mode name map)
6748645f	229	(set (make-local-variable mode) t)
a8151ef7 LMI	230	(unless (assq mode minor-mode-alist)
	231	(push `(,mode ,name) minor-mode-alist))
	232	(unless (assq mode minor-mode-map-alist)
	233	(push (cons mode map)
	234	minor-mode-map-alist))))
	235
6748645f LMI	236	(defun gnus-x-splash ()
	237	"Show a splash screen using a pixmap in the current buffer."
	238	(let ((dir (nnheader-find-etc-directory "gnus"))
	239	pixmap file height beg i)
	240	(save-excursion
	241	(switch-to-buffer (gnus-get-buffer-create gnus-group-buffer))
	242	(let ((buffer-read-only nil))
	243	(erase-buffer)
	244	(when (and dir
	245	(file-exists-p (setq file (concat dir "x-splash"))))
	246	(nnheader-temp-write nil
	247	(insert-file-contents file)
	248	(goto-char (point-min))
	249	(ignore-errors
	250	(setq pixmap (read (current-buffer))))))
	251	(when pixmap
	252	(erase-buffer)
	253	(unless (facep 'gnus-splash)
	254	(make-face 'gnus-splash))
	255	(setq height (/ (car pixmap) (frame-char-height))
	256	width (/ (cadr pixmap) (frame-char-width)))
	257	(set-face-foreground 'gnus-splash "ForestGreen")
	258	(set-face-stipple 'gnus-splash pixmap)
	259	(insert-char ?\n (* (/ (window-height) 2 height) height))
	260	(setq i height)
	261	(while (> i 0)
	262	(insert-char ? (* (+ (/ (window-width) 2 width) 1) width))
	263	(setq beg (point))
	264	(insert-char ? width)
	265	(set-text-properties beg (point) '(face gnus-splash))
	266	(insert "\n")
	267	(decf i))
	268	(goto-char (point-min))
	269	(sit-for 0))))))
	270
	271	(if (fboundp 'split-string)
	272	(fset 'gnus-split-string 'split-string)
	273	(defun gnus-split-string (string pattern)
	274	"Return a list of substrings of STRING which are separated by PATTERN."
	275	(let (parts (start 0))
	276	(while (string-match pattern string start)
	277	(setq parts (cons (substring string start (match-beginning 0)) parts)
	278	start (match-end 0)))
	279	(nreverse (cons (substring string start) parts)))))
	280
eec82323 LMI	281	(provide 'gnus-ems)
	282
	283	;; Local Variables:
	284	;; byte-compile-warnings: '(redefine callargs)
	285	;; End:
	286
	287	;;; gnus-ems.el ends here