;;; gnus-util.el --- utility functions for Semi-gnus
-;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002
+;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
;; Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
(funcall (if (stringp buffer) 'get-buffer 'buffer-name)
buffer))))
-(defmacro gnus-kill-buffer (buffer)
- `(let ((buf ,buffer))
- (when (gnus-buffer-exists-p buf)
- (kill-buffer buf))))
-
(static-cond
((fboundp 'point-at-bol)
(defalias 'gnus-point-at-bol 'point-at-bol))
;; Delete the current line (and the next N lines).
(defmacro gnus-delete-line (&optional n)
- `(delete-region (progn (beginning-of-line) (point))
+ `(delete-region (gnus-point-at-bol)
(progn (forward-line ,(or n 1)) (point))))
(defun gnus-byte-code (func)
(nnheader-narrow-to-headers)
(message-fetch-field field)))))
+(defun gnus-fetch-original-field (field)
+ "Fetch FIELD from the original version of the current article."
+ (with-current-buffer gnus-original-article-buffer
+ (gnus-fetch-field field)))
+
+
(defun gnus-goto-colon ()
(beginning-of-line)
(let ((eol (gnus-point-at-eol)))
(defun gnus-read-event-char (&optional prompt)
"Get the next event."
- (let ((event (read-event prompt)))
+ (let ((event (condition-case nil
+ (read-event prompt)
+ ;; `read-event' doesn't allow arguments in Mule 2.3
+ (wrong-number-of-arguments
+ (when prompt
+ (message "%s" prompt))
+ (read-event)))))
;; should be gnus-characterp, but this can't be called in XEmacs anyway
(cons (and (numberp event) event) event)))
(prin1 form (current-buffer))))
(defun gnus-prin1-to-string (form)
- "The same as `prin1', but bind `print-quoted' and `print-readably' to t."
+ "The same as `prin1'.
+Bind `print-quoted' and `print-readably' to t, and `print-length'
+and `print-level' to nil."
(let ((print-quoted t)
- (print-readably t))
+ (print-readably t)
+ (print-length nil)
+ (print-level nil))
(prin1-to-string form)))
(defun gnus-make-directory (directory)
b (setq b (next-single-property-change b 'gnus-face nil end))
prop val))))))
+(defmacro gnus-faces-at (position)
+ "Return a list of faces at POSITION."
+ (if (featurep 'xemacs)
+ `(let ((pos ,position))
+ (mapcar-extents 'extent-face
+ nil (current-buffer) pos pos nil 'face))
+ `(let ((pos ,position))
+ (delq nil (cons (get-text-property pos 'face)
+ (mapcar
+ (lambda (overlay)
+ (overlay-get overlay 'face))
+ (overlays-at pos)))))))
+
;;; Protected and atomic operations. dmoore@ucsd.edu 21.11.1996
;;; The primary idea here is to try to protect internal datastructures
;;; from becoming corrupted when the user hits C-g, or if a hook or
(defun gnus-map-function (funs arg)
"Applies the result of the first function in FUNS to the second, and so on.
ARG is passed to the first function."
- (let ((myfuns funs))
- (while myfuns
- (setq arg (funcall (pop myfuns) arg)))
- arg))
+ (while funs
+ (setq arg (funcall (pop funs) arg)))
+ arg)
(defun gnus-run-hooks (&rest funcs)
- "Does the same as `run-hooks', but saves excursion."
- (let ((buf (current-buffer)))
- (unwind-protect
- (apply 'run-hooks funcs)
- (set-buffer buf))))
+ "Does the same as `run-hooks', but saves the current buffer."
+ (save-current-buffer
+ (apply 'run-hooks funcs)))
;;; Various
(eq major-mode 'gnus-group-mode))))
(defun gnus-remove-duplicates (list)
- (let (new (tail list))
- (while tail
- (or (member (car tail) new)
- (setq new (cons (car tail) new)))
- (setq tail (cdr tail)))
+ (let (new)
+ (while list
+ (or (member (car list) new)
+ (setq new (cons (car list) new)))
+ (setq list (cdr list)))
(nreverse new)))
-(defun gnus-delete-if (predicate list)
- "Delete elements from LIST that satisfy PREDICATE."
+(defun gnus-remove-if (predicate list)
+ "Return a copy of LIST with all items satisfying PREDICATE removed."
(let (out)
(while list
(unless (funcall predicate (car list))
(push (car list) out))
- (pop list))
+ (setq list (cdr list)))
(nreverse out)))
(if (fboundp 'assq-delete-all)
(while (search-backward "\\." nil t)
(delete-char 1)))))
+(defmacro gnus-with-output-to-file (file &rest body)
+ (let ((buffer (make-symbol "output-buffer"))
+ (size (make-symbol "output-buffer-size"))
+ (leng (make-symbol "output-buffer-length")))
+ `(let* ((print-quoted t)
+ (print-readably t)
+ (print-escape-multibyte nil)
+ print-level
+ print-length
+ (,size 131072)
+ (,buffer (make-string ,size 0))
+ (,leng 0)
+ (append nil)
+ (standard-output
+ (lambda (c)
+ (aset ,buffer ,leng c)
+ (if (= ,size (setq ,leng (1+ ,leng)))
+ (progn (write-region ,buffer nil ,file append 'no-msg)
+ (setq ,leng 0
+ append t))))))
+ ,@body
+ (when (> ,leng 0)
+ (write-region (substring ,buffer 0 ,leng) nil ,file
+ append 'no-msg)))))
+
+(put 'gnus-with-output-to-file 'lisp-indent-function 1)
+(put 'gnus-with-output-to-file 'edebug-form-spec '(form body))
+
(if (fboundp 'union)
(defalias 'gnus-union 'union)
(defun gnus-union (l1 l2)
(defcustom gnus-use-byte-compile t
"If non-nil, byte-compile crucial run-time codes.
-Setting it to `nil' has no effect after first time running
+Setting it to nil has no effect after first time running
`gnus-byte-compile'."
:type 'boolean
:version "21.1"
(require 'byte-optimize)
(error))
(require 'bytecomp)
- (defalias 'gnus-byte-compile 'byte-compile)
- (byte-compile form))
+ (defalias 'gnus-byte-compile
+ (lambda (form)
+ (let ((byte-compile-warnings '(unresolved callargs redefine)))
+ (byte-compile form))))
+ (gnus-byte-compile form))
form))
(defun gnus-remassoc (key alist)
(save-window-excursion
(save-excursion
(while (not tchar)
- (message "%s (%s?): "
+ (message "%s (%s): "
prompt
(mapconcat (lambda (s) (char-to-string (car s)))
- choice ""))
+ choice ", "))
(setq tchar (read-char))
(when (not (assq tchar choice))
(setq tchar nil)
(provide 'gnus-util)
+(defmacro gnus-mapcar (function seq1 &rest seqs2_n)
+ "Apply FUNCTION to each element of the sequences, and make a list of the results.
+If there are several sequences, FUNCTION is called with that many arguments,
+and mapping stops as soon as the shortest sequence runs out. With just one
+sequence, this is like `mapcar'. With several, it is like the Common Lisp
+`mapcar' function extended to arbitrary sequence types."
+
+ (if seqs2_n
+ (let* ((seqs (cons seq1 seqs2_n))
+ (cnt 0)
+ (heads (mapcar (lambda (seq)
+ (make-symbol (concat "head"
+ (int-to-string
+ (setq cnt (1+ cnt))))))
+ seqs))
+ (result (make-symbol "result"))
+ (result-tail (make-symbol "result-tail")))
+ `(let* ,(let* ((bindings (cons nil nil))
+ (heads heads))
+ (nconc bindings (list (list result '(cons nil nil))))
+ (nconc bindings (list (list result-tail result)))
+ (while heads
+ (nconc bindings (list (list (pop heads) (pop seqs)))))
+ (cdr bindings))
+ (while (and ,@heads)
+ (setcdr ,result-tail (cons (funcall ,function
+ ,@(mapcar (lambda (h) (list 'car h))
+ heads))
+ nil))
+ (setq ,result-tail (cdr ,result-tail)
+ ,@(apply 'nconc (mapcar (lambda (h) (list h (list 'cdr h))) heads))))
+ (cdr ,result)))
+ `(mapcar ,function ,seq1)))
+
;;; gnus-util.el ends here
projects / elisp / gnus.git- / blobdiff