+(defun gnus-multiple-choice (prompt choice &optional idx)
+ "Ask user a multiple choice question.
+CHOICE is a list of the choice char and help message at IDX."
+ (let (tchar buf)
+ (save-window-excursion
+ (save-excursion
+ (while (not tchar)
+ (message "%s (%s): "
+ prompt
+ (concat
+ (mapconcat (lambda (s) (char-to-string (car s)))
+ choice ", ") ", ?"))
+ (setq tchar (read-char))
+ (when (not (assq tchar choice))
+ (setq tchar nil)
+ (setq buf (get-buffer-create "*Gnus Help*"))
+ (pop-to-buffer buf)
+ (fundamental-mode) ; for Emacs 20.4+
+ (buffer-disable-undo)
+ (erase-buffer)
+ (insert prompt ":\n\n")
+ (let ((max -1)
+ (list choice)
+ (alist choice)
+ (idx (or idx 1))
+ (i 0)
+ n width pad format)
+ ;; find the longest string to display
+ (while list
+ (setq n (length (nth idx (car list))))
+ (unless (> max n)
+ (setq max n))
+ (setq list (cdr list)))
+ (setq max (+ max 4)) ; %c, `:', SPACE, a SPACE at end
+ (setq n (/ (1- (window-width)) max)) ; items per line
+ (setq width (/ (1- (window-width)) n)) ; width of each item
+ ;; insert `n' items, each in a field of width `width'
+ (while alist
+ (if (< i n)
+ ()
+ (setq i 0)
+ (delete-char -1) ; the `\n' takes a char
+ (insert "\n"))
+ (setq pad (- width 3))
+ (setq format (concat "%c: %-" (int-to-string pad) "s"))
+ (insert (format format (caar alist) (nth idx (car alist))))
+ (setq alist (cdr alist))
+ (setq i (1+ i))))))))
+ (if (buffer-live-p buf)
+ (kill-buffer buf))
+ tchar))
+
+(defun gnus-select-frame-set-input-focus (frame)
+ "Select FRAME, raise it, and set input focus, if possible."
+ (cond ((featurep 'xemacs)
+ (raise-frame frame)
+ (select-frame frame)
+ (focus-frame frame))
+ ;; The function `select-frame-set-input-focus' won't set
+ ;; the input focus under Emacs 21.2 and X window system.
+ ;;((fboundp 'select-frame-set-input-focus)
+ ;; (defalias 'gnus-select-frame-set-input-focus
+ ;; 'select-frame-set-input-focus)
+ ;; (select-frame-set-input-focus frame))
+ (t
+ (raise-frame frame)
+ (select-frame frame)
+ (cond ((and (eq window-system 'x)
+ (fboundp 'x-focus-frame))
+ (x-focus-frame frame))
+ ((eq window-system 'w32)
+ (w32-focus-frame frame)))
+ (when focus-follows-mouse
+ (set-mouse-position frame (1- (frame-width frame)) 0)))))
+
+(defun gnus-frame-or-window-display-name (object)
+ "Given a frame or window, return the associated display name.
+Return nil otherwise."
+ (if (featurep 'xemacs)
+ (device-connection (dfw-device object))
+ (if (or (framep object)
+ (and (windowp object)
+ (setq object (window-frame object))))
+ (let ((display (frame-parameter object 'display)))
+ (if (and (stringp display)
+ ;; Exclude invalid display names.
+ (string-match "\\`[^:]*:[0-9]+\\(\\.[0-9]+\\)?\\'"
+ display))
+ display)))))
+
+;; Fixme: This has only one use (in gnus-agent), which isn't worthwhile.
+(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)))
+
+(if (fboundp 'merge)
+ (defalias 'gnus-merge 'merge)
+ ;; Adapted from cl-seq.el
+ (defun gnus-merge (type list1 list2 pred)
+ "Destructively merge lists LIST1 and LIST2 to produce a new list.
+Argument TYPE is for compatibility and ignored.
+Ordering of the elements is preserved according to PRED, a `less-than'
+predicate on the elements."
+ (let ((res nil))
+ (while (and list1 list2)
+ (if (funcall pred (car list2) (car list1))
+ (push (pop list2) res)
+ (push (pop list1) res)))
+ (nconc (nreverse res) list1 list2))))
+
+(eval-when-compile
+ (defvar xemacs-codename))
+
+(defun gnus-emacs-version ()
+ "Stringified Emacs version."
+ (let ((system-v
+ (cond
+ ((eq gnus-user-agent 'emacs-gnus-config)
+ system-configuration)
+ ((eq gnus-user-agent 'emacs-gnus-type)
+ (symbol-name system-type))
+ (t nil))))
+ (cond
+ ((eq gnus-user-agent 'gnus)
+ nil)
+ ((string-match "^\\(\\([.0-9]+\\)*\\)\\.[0-9]+$" emacs-version)
+ (concat "Emacs/" (match-string 1 emacs-version)
+ (if system-v
+ (concat " (" system-v ")")
+ "")))
+ ((string-match
+ "\\([A-Z]*[Mm][Aa][Cc][Ss]\\)[^(]*\\(\\((beta.*)\\|'\\)\\)?"
+ emacs-version)
+ (concat
+ (match-string 1 emacs-version)
+ (format "/%d.%d" emacs-major-version emacs-minor-version)
+ (if (match-beginning 3)
+ (match-string 3 emacs-version)
+ "")
+ (if (boundp 'xemacs-codename)
+ (concat
+ " (" xemacs-codename
+ (if system-v
+ (concat ", " system-v ")")
+ ")"))
+ "")))
+ (t emacs-version))))
+
+(defun gnus-rename-file (old-path new-path &optional trim)
+ "Rename OLD-PATH as NEW-PATH. If TRIM, recursively delete
+empty directories from OLD-PATH."
+ (when (file-exists-p old-path)
+ (let* ((old-dir (file-name-directory old-path))
+ (old-name (file-name-nondirectory old-path))
+ (new-dir (file-name-directory new-path))
+ (new-name (file-name-nondirectory new-path))
+ temp)
+ (gnus-make-directory new-dir)
+ (rename-file old-path new-path t)
+ (when trim
+ (while (progn (setq temp (directory-files old-dir))
+ (while (member (car temp) '("." ".."))
+ (setq temp (cdr temp)))
+ (= (length temp) 0))
+ (delete-directory old-dir)
+ (setq old-dir (file-name-as-directory
+ (file-truename
+ (concat old-dir "..")))))))))
+
+(defun gnus-set-file-modes (filename mode)
+ "Wrapper for set-file-modes."
+ (ignore-errors
+ (set-file-modes filename mode)))
+
projects / gnus / blobdiff