236445 - missing events in certain month when setting Monday for first day of the week

Status: RESOLVED FIXED

(Calendar :: General, defect)

Description

[Martin McDowell]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6) Gecko/20040113
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6) Gecko/20040113

Using Clandar 1.6 for Mozilla I had a problem displaying events in the March
2004 view when I select in Edit-Preferences-Calendar-Views-General First day of
the week is Monday. If I return the value back to Sunday, I can again see all
the March events. This bug must be specific to the March view as when I look at
the February or April views I cann see some of the March events that can be
viewed in the adjacent month views.

Reproducible: Always
Steps to Reproduce:
1.Install Mozilla 1.6
2.Install Mozilla Calendar 1.6
3.Set First day of the week is Monday (instead of the default value Sunday)

Actual Results:  
Events in the March 2004 month view dissapeared

Expected Results:  
Shown all the events in the March view

Comment 1

[Mostafa Hosseini]

Can you please attach the ics file or at least copy paste one event here?

Comment 2

[Martin McDowell]

Hi Mostafa

I doubt this bug is due to the even as there are many loaded events from
calendars on the web http://mozilla.org/projects/calendar/holidays.html
I have some of my own events together with Slovenian and UK holidays. Regardles
of the event belonging to a certain calendat none can be seen in the March view
if the week starts with Monday. Anyway, here is an example of a March event:

BEGIN:VCALENDAR
VERSION
 :2.0
PRODID
 :-//Mozilla.org/NONSGML Mozilla Calendar V1.0//EN
METHOD
 :PUBLISH
BEGIN:VEVENT
UID
 :dc7eab00-661e-11d8-9e2c-e7fb0718e76a
SUMMARY
 :Zimska oprema - konec
STATUS
 :CONFIRMED
CLASS
 :PRIVATE
X-MOZILLA-ALARM-DEFAULT-LENGTH
 :0
X-MOZILLA-RECUR-DEFAULT-UNITS
 :years
RRULE
 :FREQ=YEARLY;INTERVAL=1;BYMONTH=3
DTSTART
 ;VALUE=DATE
 :20040315
DTEND
 ;VALUE=DATE
 :20040316
DTSTAMP
 :20040223T163844Z
BEGIN:VALARM
TRIGGER
 ;VALUE=DURATION
 :PT1S
END:VALARM
END:VEVENT
END:VCALENDAR

Comment 3

[Mostafa Hosseini]

It's probably a combination issue then since this event shows fine on mine.
1) Do you see any JS errors in the Javascript Console?
2) Try using just one calendar with one event in it ( disable all others ) and
see if it shows up. If it does start adding in the other calendars one by one to
see if you can find the calendar file which is causing the problem.

Comment 4

[Martin McDowell]

Attachment: The problematic calendar

Yes, it does seem it was down to one of the calendars I created. If that
calendar was active (ticket) then NO events were displayed, regardless of the
calendar they were in. 

Can anyone analyze what is wrong with this file, would it be possible if
Mozilla Calendar could debug such seemingly corrupt calendar files?

Comment 5

[Jussi Kukkonen]

Confirming. Even multiweek stops working when the first week starts on March 1,
no events are drawn. When I move a week forward everything is visible.

Comment 6

[Jussi Kukkonen]

Noticed one more thing: there is an event six years long in the file, and it's
set to recur every month. It doesn't explain anything, but I bet it's got
something to do with the problem.

Title of event: Oddaj mesečno poročilo!

Comment 7

[Mostafa Hosseini]

Attachment: Simple Calendar file with same problem

Using the original calendar file I was able to generate a simpler file with
just two events that has the same problem.
I too suspected that the 6 year long event was the cause but then realized that
it wasn't.
With this calendar file, the "March 8th" event does not show up. If the
"troublesome event" is changed to be non recurring, "March 8th" will show.
Interesting point is that "troublesome event" will still show up on Feb 29th
although it is non recurring.

Comment 8

[Mostafa Hosseini]

Attachment: Fix

This fixes the enormous mistake in the backend.

Comment 9

[Mostafa Hosseini]

Patch checked into CVS.

Comment 10

[Martin McDowell]

Great effort Mostafa :-)

Comment 11

[Reed Loden [:reed]]

The bugspam monkeys have been set free and are feeding on Calendar :: General. Be afraid for your sanity!