1 ;;; gnus-spec.el --- format spec functions for Gnus
2 ;; Copyright (C) 1996 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
7 ;; This file is part of GNU Emacs.
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)
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.
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.
31 ;;; Internal variables.
33 (defvar gnus-summary-mark-positions nil)
34 (defvar gnus-group-mark-positions nil)
35 (defvar gnus-group-indentation "")
37 ;; Format specs. The chunks below are the machine-generated forms
38 ;; that are to be evaled as the result of the default format strings.
39 ;; We write them in here to get them byte-compiled. That way the
40 ;; default actions will be quite fast, while still retaining the full
41 ;; flexibility of the user-defined format specs.
43 ;; First we have lots of dummy defvars to let the compiler know these
44 ;; are really dynamic variables.
46 (defvar gnus-tmp-unread)
47 (defvar gnus-tmp-replied)
48 (defvar gnus-tmp-score-char)
49 (defvar gnus-tmp-indentation)
50 (defvar gnus-tmp-opening-bracket)
51 (defvar gnus-tmp-lines)
52 (defvar gnus-tmp-name)
53 (defvar gnus-tmp-closing-bracket)
54 (defvar gnus-tmp-subject-or-nil)
55 (defvar gnus-tmp-subject)
56 (defvar gnus-tmp-marked)
57 (defvar gnus-tmp-marked-mark)
58 (defvar gnus-tmp-subscribed)
59 (defvar gnus-tmp-process-marked)
60 (defvar gnus-tmp-number-of-unread)
61 (defvar gnus-tmp-group-name)
62 (defvar gnus-tmp-group)
63 (defvar gnus-tmp-article-number)
64 (defvar gnus-tmp-unread-and-unselected)
65 (defvar gnus-tmp-news-method)
66 (defvar gnus-tmp-news-server)
67 (defvar gnus-tmp-article-number)
68 (defvar gnus-mouse-face)
69 (defvar gnus-mouse-face-prop)
71 (defun gnus-summary-line-format-spec ()
72 (insert gnus-tmp-unread gnus-tmp-replied
73 gnus-tmp-score-char gnus-tmp-indentation)
74 (gnus-put-text-property
78 gnus-tmp-opening-bracket
81 (if (> (length gnus-tmp-name) 20)
82 (substring gnus-tmp-name 0 20)
84 gnus-tmp-closing-bracket)
86 gnus-mouse-face-prop gnus-mouse-face)
87 (insert " " gnus-tmp-subject-or-nil "\n"))
89 (defvar gnus-summary-line-format-spec
90 (gnus-byte-code 'gnus-summary-line-format-spec))
92 (defun gnus-summary-dummy-line-format-spec ()
94 (gnus-put-text-property
99 gnus-mouse-face-prop gnus-mouse-face)
100 (insert " " gnus-tmp-subject "\n"))
102 (defvar gnus-summary-dummy-line-format-spec
103 (gnus-byte-code 'gnus-summary-dummy-line-format-spec))
105 (defun gnus-group-line-format-spec ()
106 (insert gnus-tmp-marked-mark gnus-tmp-subscribed
107 gnus-tmp-process-marked
108 gnus-group-indentation
109 (format "%5s: " gnus-tmp-number-of-unread))
110 (gnus-put-text-property
113 (insert gnus-tmp-group "\n")
115 gnus-mouse-face-prop gnus-mouse-face))
116 (defvar gnus-group-line-format-spec
117 (gnus-byte-code 'gnus-group-line-format-spec))
119 (defvar gnus-format-specs
120 `((version . ,emacs-version)
121 (group "%M\%S\%p\%P\%5y: %(%g%)%l\n" ,gnus-group-line-format-spec)
122 (summary-dummy "* %(: :%) %S\n"
123 ,gnus-summary-dummy-line-format-spec)
124 (summary "%U\%R\%z\%I\%(%[%4L: %-20,20n%]%) %s\n"
125 ,gnus-summary-line-format-spec))
126 "Alist of format specs.")
128 (defvar gnus-article-mode-line-format-spec nil)
129 (defvar gnus-summary-mode-line-format-spec nil)
130 (defvar gnus-group-mode-line-format-spec nil)
132 ;;; Phew. All that gruft is over, fortunately.
135 (defun gnus-update-format (var)
136 "Update the format specification near point."
141 ;; Find the end of the current word.
142 (re-search-forward "[ \t\n]" nil t)
144 (when (re-search-backward "\\(gnus-[-a-z]+-line-format\\)" nil t)
146 (let* ((type (intern (progn (string-match "gnus-\\([-a-z]+\\)-line" var)
147 (match-string 1 var))))
148 (entry (assq type gnus-format-specs))
151 (setq gnus-format-specs (delq entry gnus-format-specs)))
153 (intern (format "%s-spec" var))
154 (gnus-parse-format (setq value (symbol-value (intern var)))
155 (symbol-value (intern (format "%s-alist" var)))
156 (not (string-match "mode" var))))
157 (setq spec (symbol-value (intern (format "%s-spec" var))))
158 (push (list type value spec) gnus-format-specs)
160 (pop-to-buffer "*Gnus Format*")
162 (lisp-interaction-mode)
163 (insert (pp-to-string spec))))
165 (defun gnus-update-format-specifications (&optional force &rest types)
166 "Update all (necessary) format specifications."
167 ;; Make the indentation array.
169 ;; See whether all the stored info needs to be flushed.
171 (not (equal emacs-version
172 (cdr (assq 'version gnus-format-specs)))))
173 (setq gnus-format-specs nil))
175 ;; Go through all the formats and see whether they need updating.
176 (let (new-format entry type val)
177 (while (setq type (pop types))
178 ;; Jump to the proper buffer to find out the value of
179 ;; the variable, if possible. (It may be buffer-local.)
181 (let ((buffer (intern (format "gnus-%s-buffer" type)))
183 (when (and (boundp buffer)
184 (setq val (symbol-value buffer))
186 (buffer-name (get-buffer val)))
187 (set-buffer (get-buffer val)))
188 (setq new-format (symbol-value
189 (intern (format "gnus-%s-line-format" type))))))
190 (setq entry (cdr (assq type gnus-format-specs)))
192 (equal (car entry) new-format))
193 ;; Use the old format.
194 (set (intern (format "gnus-%s-line-format-spec" type))
196 ;; This is a new format.
198 (if (not (stringp new-format))
199 ;; This is a function call or something.
201 ;; This is a "real" format.
205 (intern (format "gnus-%s-line-format-alist"
206 (if (eq type 'article-mode)
207 'summary-mode type))))
208 (not (string-match "mode$" (symbol-name type))))))
209 ;; Enter the new format spec into the list.
212 (setcar (cdr entry) val)
213 (setcar entry new-format))
214 (push (list type new-format val) gnus-format-specs))
215 (set (intern (format "gnus-%s-line-format-spec" type)) val))))
217 (unless (assq 'version gnus-format-specs)
218 (push (cons 'version emacs-version) gnus-format-specs)))
220 (defvar gnus-mouse-face-0 'highlight)
221 (defvar gnus-mouse-face-1 'highlight)
222 (defvar gnus-mouse-face-2 'highlight)
223 (defvar gnus-mouse-face-3 'highlight)
224 (defvar gnus-mouse-face-4 'highlight)
226 (defun gnus-mouse-face-function (form type)
227 `(gnus-put-text-property
228 (point) (progn ,@form (point))
232 `(quote ,(symbol-value (intern (format "gnus-mouse-face-%d" type)))))))
234 (defvar gnus-face-0 'bold)
235 (defvar gnus-face-1 'italic)
236 (defvar gnus-face-2 'bold-italic)
237 (defvar gnus-face-3 'bold)
238 (defvar gnus-face-4 'bold)
240 (defun gnus-face-face-function (form type)
241 `(gnus-put-text-property
242 (point) (progn ,@form (point))
243 'face ',(symbol-value (intern (format "gnus-face-%d" type)))))
245 (defun gnus-max-width-function (el max-width)
246 (or (numberp max-width) (signal 'wrong-type-argument '(numberp max-width)))
248 `(if (> (length ,el) ,max-width)
249 (substring ,el 0 ,max-width)
251 `(let ((val (eval ,el)))
253 (setq val (int-to-string val)))
254 (if (> (length val) ,max-width)
255 (substring val 0 ,max-width)
258 (defun gnus-parse-format (format spec-alist &optional insert)
259 ;; This function parses the FORMAT string with the help of the
260 ;; SPEC-ALIST and returns a list that can be eval'ed to return the
261 ;; string. If the FORMAT string contains the specifiers %( and %)
262 ;; the text between them will have the mouse-face text property.
264 "\\`\\(.*\\)%[0-9]?[{(]\\(.*\\)%[0-9]?[})]\\(.*\n?\\)\\'"
266 (gnus-parse-complex-format format spec-alist)
267 ;; This is a simple format.
268 (gnus-parse-simple-format format spec-alist insert)))
270 (defun gnus-parse-complex-format (format spec-alist)
272 (gnus-set-work-buffer)
274 (goto-char (point-min))
275 (while (re-search-forward "\"" nil t)
276 (replace-match "\\\"" nil t))
277 (goto-char (point-min))
279 (while (re-search-forward "%\\([0-9]+\\)?\\([{}()]\\)" nil t)
280 (let ((number (if (match-beginning 1)
281 (match-string 1) "0"))
282 (delim (aref (match-string 2) 0)))
283 (if (or (= delim ?\() (= delim ?\{))
284 (replace-match (concat "\"(" (if (= delim ?\() "mouse" "face")
286 (replace-match "\")\""))))
287 (goto-char (point-max))
289 (goto-char (point-min))
290 (let ((form (read (current-buffer))))
291 (cons 'progn (gnus-complex-form-to-spec form spec-alist)))))
293 (defun gnus-complex-form-to-spec (form spec-alist)
298 (gnus-parse-simple-format sform spec-alist t)
299 (funcall (intern (format "gnus-%s-face-function" (car sform)))
300 (gnus-complex-form-to-spec (cddr sform) spec-alist)
304 (defun gnus-parse-simple-format (format spec-alist &optional insert)
305 ;; This function parses the FORMAT string with the help of the
306 ;; SPEC-ALIST and returns a list that can be eval'ed to return a
309 spec flist fstring newspec elem beg result dontinsert)
311 (gnus-set-work-buffer)
313 (goto-char (point-min))
314 (while (re-search-forward "%[-0-9]*\\(,[0-9]+\\)?\\([^0-9]\\)\\(.\\)?"
316 (if (= (setq spec (string-to-char (match-string 2))) ?%)
318 beg (1+ (match-beginning 0)))
319 ;; First check if there are any specs that look anything like
320 ;; "%12,12A", ie. with a "max width specification". These have
321 ;; to be treated specially.
322 (if (setq beg (match-beginning 1))
326 (1+ (match-beginning 1)) (match-end 1))))
328 (setq beg (match-beginning 2)))
329 ;; Find the specification from `spec-alist'.
330 (unless (setq elem (cdr (assq spec spec-alist)))
331 (setq elem '("*" ?s)))
332 ;; Treat user defined format specifiers specially.
333 (when (eq (car elem) 'gnus-tmp-user-defined)
336 (list (intern (concat "gnus-user-format-function-"
338 'gnus-tmp-header) ?s))
339 (delete-region (match-beginning 3) (match-end 3)))
340 (if (not (zerop max-width))
341 (let ((el (car elem)))
342 (cond ((= (cadr elem) ?c)
343 (setq el (list 'char-to-string el)))
345 (setq el (list 'int-to-string el))))
346 (setq flist (cons (gnus-max-width-function el max-width)
350 (setq flist (cons (car elem) flist))
351 (setq newspec (cadr elem)))))
352 ;; Remove the old specification (and possibly a ",12" string).
353 (delete-region beg (match-end 2))
354 ;; Insert the new specification.
357 (setq fstring (buffer-substring 1 (point-max))))
358 ;; Do some postprocessing to increase efficiency.
363 ((string= fstring "")
365 ;; Not a format string.
366 ((not (string-match "%" fstring))
368 ;; A format string with just a single string spec.
369 ((string= fstring "%s")
371 ;; A single character.
372 ((string= fstring "%c")
375 ((string= fstring "%d")
378 (list `(princ ,(car flist)))
379 (list `(int-to-string ,(car flist)))))
380 ;; Just lots of chars and strings.
381 ((string-match "\\`\\(%[cs]\\)+\\'" fstring)
383 ;; A single string spec at the beginning of the spec.
384 ((string-match "\\`%[sc][^%]+\\'" fstring)
385 (list (car flist) (substring fstring 2)))
386 ;; A single string spec in the middle of the spec.
387 ((string-match "\\`\\([^%]+\\)%[sc]\\([^%]+\\)\\'" fstring)
388 (list (match-string 1 fstring) (car flist) (match-string 2 fstring)))
389 ;; A single string spec in the end of the spec.
390 ((string-match "\\`\\([^%]+\\)%[sc]\\'" fstring)
391 (list (match-string 1 fstring) (car flist)))
392 ;; A more complex spec.
394 (list (cons 'format (cons fstring (nreverse flist)))))))
400 (cons 'insert result)))
401 (cond ((stringp result)
404 (cons 'concat result))
407 (defun gnus-eval-format (format &optional alist props)
408 "Eval the format variable FORMAT, using ALIST.
409 If PROPS, insert the result."
410 (let ((form (gnus-parse-format format alist props)))
412 (gnus-add-text-properties (point) (progn (eval form) (point)) props)
415 (defun gnus-compile ()
416 "Byte-compile the user-defined format specs."
418 (let ((entries gnus-format-specs)
421 (gnus-message 7 "Compiling format specs...")
424 (setq entry (pop entries))
425 (if (eq (car entry) 'version)
426 (setq gnus-format-specs (delq entry gnus-format-specs))
427 (when (and (listp (caddr entry))
428 (not (eq 'byte-code (caaddr entry))))
430 `(lambda () ,(caddr entry)))
431 (byte-compile 'gnus-tmp-func)
432 (setcar (cddr entry) (gnus-byte-code 'gnus-tmp-func)))))
434 (push (cons 'version emacs-version) gnus-format-specs)
435 ;; Mark the .newsrc.eld file as "dirty".
436 (gnus-dribble-enter " ")
437 (gnus-message 7 "Compiling user specs...done"))))
441 ;;; gnus-spec.el ends here