During the extra hours of org-extend-today-until, when
org-clock-mode-line-total is 'today, the clocked time shown in the
modeline is wrong. It ignores all previously clocked time, when it
should add them starting from the past day beyond
org-extend-today-until hours.  This also affects clock tables.

The problem can be reproduced in emacs with the following code,
as long as the current time is not between 11 PM and 12 AM:

  (progn
    (require 'org-clock)
    (setq org-clock-mode-line-total 'today)
    (setq org-extend-today-until 23)
    (format-time-string "%a %D %l:%M %p" (org-clock-get-sum-start)))

expected result:
A date of yesterday, time of 11:00 PM

Actual result:
A date of today, time of 11:00 PM

Note this patch only fixes a bug where org-extend-today-until
is already used.


- Ian Kelling
>From 619572e221cafc17f0a1c33654eb22d7ca5f4d89 Mon Sep 17 00:00:00 2001
From: Ian Kelling <ian...@gmail.com>
Date: Sun, 15 Sep 2013 08:03:24 -0700
Subject: [PATCH] Fix incorrect time calculation for org-extend-today-until

* lisp/org-clock.el Fix bad date math. Affects mode line and
  clock tables.

TINYCHANGE
---
 lisp/org-clock.el | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/lisp/org-clock.el b/lisp/org-clock.el
index 9f22562..3195dc1 100644
--- a/lisp/org-clock.el
+++ b/lisp/org-clock.el
@@ -1368,10 +1368,12 @@ decides which time to use."
       (current-time))
      ((equal cmt "today")
       (setq msg-extra "showing today's task time.")
-      (let* ((dt (decode-time (current-time))))
-	(setq dt (append (list 0 0 0) (nthcdr 3 dt)))
-	(if org-extend-today-until
-	    (setf (nth 2 dt) org-extend-today-until))
+      (let* ((dt (decode-time (current-time)))
+	     (hour (nth 2 dt))
+	     (day (nth 3 dt)))
+	(if (< hour org-extend-today-until) (setf (nth 3 dt) (1- day)))
+	(setf (nth 2 dt) org-extend-today-until)
+	(setq dt (append (list 0 0) (nthcdr 2 dt)))
 	(apply 'encode-time dt)))
      ((or (equal cmt "all")
 	  (and (or (not cmt) (equal cmt "auto"))
-- 
1.8.3.1

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