(defun article-make-date-line (date type)
"Return a DATE line of TYPE."
- (let ((time (condition-case ()
- (date-to-time date)
- (error '(0 0)))))
- (cond
- ;; Convert to the local timezone. We have to slap a
- ;; `condition-case' round the calls to the timezone
- ;; functions since they aren't particularly resistant to
- ;; buggy dates.
- ((eq type 'local)
- (let ((tz (car (current-time-zone time))))
- (format "Date: %s %s%02d%02d" (current-time-string time)
- (if (> tz 0) "+" "-") (/ (abs tz) 3600)
- (/ (% (abs tz) 3600) 60))))
- ;; Convert to Universal Time.
- ((eq type 'ut)
- (concat "Date: "
- (current-time-string
- (let* ((e (parse-time-string date))
- (tm (apply 'encode-time e))
- (ms (car tm))
- (ls (- (cadr tm) (car (current-time-zone time)))))
- (cond ((< ls 0) (list (1- ms) (+ ls 65536)))
- ((> ls 65535) (list (1+ ms) (- ls 65536)))
- (t (list ms ls)))))
- " UT"))
- ;; Get the original date from the article.
- ((eq type 'original)
- (concat "Date: " (if (string-match "\n+$" date)
- (substring date 0 (match-beginning 0))
- date)))
- ;; Let the user define the format.
- ((eq type 'user)
- (if (gnus-functionp gnus-article-time-format)
- (funcall gnus-article-time-format time)
- (concat
- "Date: "
- (format-time-string gnus-article-time-format time))))
- ;; ISO 8601.
- ((eq type 'iso8601)
- (let ((tz (car (current-time-zone time))))
- (concat
- "Date: "
- (format-time-string "%Y%m%dT%H%M%S" time)
- (format "%s%02d%02d"
- (if (> tz 0) "+" "-") (/ (abs tz) 3600)
- (/ (% (abs tz) 3600) 60)))))
- ;; Do an X-Sent lapsed format.
- ((eq type 'lapsed)
- ;; If the date is seriously mangled, the timezone functions are
- ;; liable to bug out, so we ignore all errors.
- (let* ((now (current-time))
- (real-time (subtract-time now time))
- (real-sec (and real-time
- (+ (* (float (car real-time)) 65536)
- (cadr real-time))))
- (sec (and real-time (abs real-sec)))
- num prev)
+ (unless (memq type '(local ut original user iso8601 lapsed english))
+ (error "Unknown conversion type: %s" type))
+ (condition-case ()
+ (let ((time (date-to-time date)))
(cond
- ((null real-time)
- "X-Sent: Unknown")
- ((zerop sec)
- "X-Sent: Now")
- (t
- (concat
- "X-Sent: "
- ;; This is a bit convoluted, but basically we go
- ;; through the time units for years, weeks, etc,
- ;; and divide things to see whether that results
- ;; in positive answers.
- (mapconcat
- (lambda (unit)
- (if (zerop (setq num (ffloor (/ sec (cdr unit)))))
- ;; The (remaining) seconds are too few to
- ;; be divided into this time unit.
- ""
- ;; It's big enough, so we output it.
- (setq sec (- sec (* num (cdr unit))))
- (prog1
- (concat (if prev ", " "") (int-to-string
- (floor num))
- " " (symbol-name (car unit))
- (if (> num 1) "s" ""))
- (setq prev t))))
- article-time-units "")
- ;; If dates are odd, then it might appear like the
- ;; article was sent in the future.
- (if (> real-sec 0)
- " ago"
- " in the future"))))))
- ;; Display the date in proper English
- ((eq type 'english)
- (let ((dtime (decode-time time)))
- (concat
- "Date: the "
- (number-to-string (nth 3 dtime))
- (let ((digit (% (nth 3 dtime) 10)))
- (cond
- ((memq (nth 3 dtime) '(11 12 13)) "th")
- ((= digit 1) "st")
- ((= digit 2) "nd")
- ((= digit 3) "rd")
- (t "th")))
- " of "
- (nth (1- (nth 4 dtime)) gnus-english-month-names)
- " "
- (number-to-string (nth 5 dtime))
- " at "
- (format "%02d" (nth 2 dtime))
- ":"
- (format "%02d" (nth 1 dtime)))))
- (t
- (error "Unknown conversion type: %s" type)))))
+ ;; Convert to the local timezone.
+ ((eq type 'local)
+ (let ((tz (car (current-time-zone time))))
+ (format "Date: %s %s%02d%02d" (current-time-string time)
+ (if (> tz 0) "+" "-") (/ (abs tz) 3600)
+ (/ (% (abs tz) 3600) 60))))
+ ;; Convert to Universal Time.
+ ((eq type 'ut)
+ (concat "Date: "
+ (current-time-string
+ (let* ((e (parse-time-string date))
+ (tm (apply 'encode-time e))
+ (ms (car tm))
+ (ls (- (cadr tm) (car (current-time-zone time)))))
+ (cond ((< ls 0) (list (1- ms) (+ ls 65536)))
+ ((> ls 65535) (list (1+ ms) (- ls 65536)))
+ (t (list ms ls)))))
+ " UT"))
+ ;; Get the original date from the article.
+ ((eq type 'original)
+ (concat "Date: " (if (string-match "\n+$" date)
+ (substring date 0 (match-beginning 0))
+ date)))
+ ;; Let the user define the format.
+ ((eq type 'user)
+ (if (gnus-functionp gnus-article-time-format)
+ (funcall gnus-article-time-format time)
+ (concat
+ "Date: "
+ (format-time-string gnus-article-time-format time))))
+ ;; ISO 8601.
+ ((eq type 'iso8601)
+ (let ((tz (car (current-time-zone time))))
+ (concat
+ "Date: "
+ (format-time-string "%Y%m%dT%H%M%S" time)
+ (format "%s%02d%02d"
+ (if (> tz 0) "+" "-") (/ (abs tz) 3600)
+ (/ (% (abs tz) 3600) 60)))))
+ ;; Do an X-Sent lapsed format.
+ ((eq type 'lapsed)
+ ;; If the date is seriously mangled, the timezone functions are
+ ;; liable to bug out, so we ignore all errors.
+ (let* ((now (current-time))
+ (real-time (subtract-time now time))
+ (real-sec (and real-time
+ (+ (* (float (car real-time)) 65536)
+ (cadr real-time))))
+ (sec (and real-time (abs real-sec)))
+ num prev)
+ (cond
+ ((null real-time)
+ "X-Sent: Unknown")
+ ((zerop sec)
+ "X-Sent: Now")
+ (t
+ (concat
+ "X-Sent: "
+ ;; This is a bit convoluted, but basically we go
+ ;; through the time units for years, weeks, etc,
+ ;; and divide things to see whether that results
+ ;; in positive answers.
+ (mapconcat
+ (lambda (unit)
+ (if (zerop (setq num (ffloor (/ sec (cdr unit)))))
+ ;; The (remaining) seconds are too few to
+ ;; be divided into this time unit.
+ ""
+ ;; It's big enough, so we output it.
+ (setq sec (- sec (* num (cdr unit))))
+ (prog1
+ (concat (if prev ", " "") (int-to-string
+ (floor num))
+ " " (symbol-name (car unit))
+ (if (> num 1) "s" ""))
+ (setq prev t))))
+ article-time-units "")
+ ;; If dates are odd, then it might appear like the
+ ;; article was sent in the future.
+ (if (> real-sec 0)
+ " ago"
+ " in the future"))))))
+ ;; Display the date in proper English
+ ((eq type 'english)
+ (let ((dtime (decode-time time)))
+ (concat
+ "Date: the "
+ (number-to-string (nth 3 dtime))
+ (let ((digit (% (nth 3 dtime) 10)))
+ (cond
+ ((memq (nth 3 dtime) '(11 12 13)) "th")
+ ((= digit 1) "st")
+ ((= digit 2) "nd")
+ ((= digit 3) "rd")
+ (t "th")))
+ " of "
+ (nth (1- (nth 4 dtime)) gnus-english-month-names)
+ " "
+ (number-to-string (nth 5 dtime))
+ " at "
+ (format "%02d" (nth 2 dtime))
+ ":"
+ (format "%02d" (nth 1 dtime)))))))
+ (error
+ (format "Date: %s (from Oort)" date))))
(defun article-date-local (&optional highlight)
"Convert the current article date to the local timezone."
projects / gnus / commitdiff