;;; gnus-util.el --- utility functions for Gnus
-;; Copyright (C) 1996-2015 Free Software Foundation, Inc.
+;; Copyright (C) 1996-2016 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: news
(setq beg (point)))
(gnus-put-text-property beg (point) prop val)))))
-(declare-function gnus-overlay-put "gnus" (overlay prop value))
-(declare-function gnus-make-overlay "gnus"
- (beg end &optional buffer front-advance rear-advance))
-
(defsubst gnus-put-overlay-excluding-newlines (beg end prop val)
"The same as `put-text-property', but don't put this prop on any newlines in the region."
(save-match-data
(save-restriction
(goto-char beg)
(while (re-search-forward gnus-emphasize-whitespace-regexp end 'move)
- (gnus-overlay-put
- (gnus-make-overlay beg (match-beginning 0))
- prop val)
+ (overlay-put (make-overlay beg (match-beginning 0)) prop val)
(setq beg (point)))
- (gnus-overlay-put (gnus-make-overlay beg (point)) prop val)))))
+ (overlay-put (make-overlay beg (point)) prop val)))))
(defun gnus-put-text-property-excluding-characters-with-faces (beg end prop val)
"The same as `put-text-property', except where `gnus-face' is set.
(if (fboundp 'union)
(defalias 'gnus-union 'union)
- (defun gnus-union (l1 l2)
- "Set union of lists L1 and L2."
+ (defun gnus-union (l1 l2 &rest keys)
+ "Set union of lists L1 and L2.
+If KEYS contains the `:test' and `equal' pair, use `equal' to compare
+items in lists, otherwise use `eq'."
(cond ((null l1) l2)
((null l2) l1)
((equal l1 l2) l1)
(t
(or (>= (length l1) (length l2))
(setq l1 (prog1 l2 (setq l2 l1))))
- (while l2
- (or (member (car l2) l1)
- (push (car l2) l1))
- (pop l2))
+ (if (eq 'equal (plist-get keys :test))
+ (while l2
+ (or (member (car l2) l1)
+ (push (car l2) l1))
+ (pop l2))
+ (while l2
+ (or (memq (car l2) l1)
+ (push (car l2) l1))
+ (pop l2)))
l1))))
(declare-function gnus-add-text-properties "gnus"
(defvar gnus-directory-sep-char-regexp "/"
"The regexp of directory separator character.
If you find some problem with the directory separator character, try
-\"[/\\\\\]\" for some systems.")
+\"[/\\\\]\" for some systems.")
(defun gnus-url-unhex (x)
(if (> x ?9)
(prompt &optional default require-match
_predicate start matches-set))
(defvar iswitchb-temp-buflist)
+(defvar iswitchb-mode)
(defun gnus-iswitchb-completing-read (prompt collection &optional require-match
initial-input history def)
(string-equal (downcase str1) (downcase prefix))
(string-equal str1 prefix))))))
+(defalias 'gnus-format-message
+ (if (fboundp 'format-message) 'format-message
+ ;; for Emacs < 25, and XEmacs, don't worry about quote translation.
+ 'format))
+
;; Simple check: can be a macro but this way, although slow, it's really clear.
;; We don't use `bound-and-true-p' because it's not in XEmacs.
(defun gnus-bound-and-true-p (sym)
(defun gnus-timer--function (timer)
(elt timer 5)))
+(defun gnus-test-list (list predicate)
+ "To each element of LIST apply PREDICATE.
+Return nil if LIST is no list or is empty or some test returns nil;
+otherwise, return t."
+ (when (and list (listp list))
+ (let ((result (mapcar predicate list)))
+ (not (memq nil result)))))
+
+(defun gnus-subsetp (list1 list2)
+ "Return t if LIST1 is a subset of LIST2.
+Similar to `subsetp' but use member for element test so that this works for
+lists of strings."
+ (when (and (listp list1) (listp list2))
+ (if list1
+ (and (member (car list1) list2)
+ (gnus-subsetp (cdr list1) list2))
+ t)))
+
+(defun gnus-setdiff (list1 list2)
+ "Return member-based set difference of LIST1 and LIST2."
+ (when (and list1 (listp list1) (listp list2))
+ (if (member (car list1) list2)
+ (gnus-setdiff (cdr list1) list2)
+ (cons (car list1) (gnus-setdiff (cdr list1) list2)))))
+
(provide 'gnus-util)
;;; gnus-util.el ends here