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-rw-r--r--module/vcomponent/datetime.scm7
1 files changed, 7 insertions, 0 deletions
diff --git a/module/vcomponent/datetime.scm b/module/vcomponent/datetime.scm
index 887ae48b..ca4f90e9 100644
--- a/module/vcomponent/datetime.scm
+++ b/module/vcomponent/datetime.scm
@@ -68,6 +68,13 @@ Event must have the DTSTART and DTEND protperty set."
date-difference datetime-difference)
(prop e 'DTEND) (prop e 'DTSTART))))
+;;
+;; |-----| extent of event
+;; |-----| time we are interested in,
+;; defined through @var{start-date} and @var{end-date}
+;; |X| part of event within that time (X)
+;;
+;; Returns the length of the interval (X).
(define-public (event-length/clamped start-date end-date e)
(let ((end (or (prop e 'DTEND)
(if (date? (prop e 'DTSTART))