Aligning BEGIN/END blocks in .ics (calendar) files

[Pete]

I'd like BC to automatically and consistently align BEGIN/END blocks in .ics (calendar) files. You can see the problem in the attached screenshot which shows (in a confusing way) that the middle BEGIN/END block in the left file was deleted and not present in the right file.

I played for hours with grammar rules and weights but I couldn't make it align line 9 in the right file with line 12 in the left file and then have the difference section in the left file be lines 13-27.

Is it possible? If not I'd like to request a way to tell BC to do this. Maybe the problem is similar to the forum topic "Brace matching in C#" http://www.scootersoftware.com/vbull...ead.php?t=4209

Left file:

BEGIN:VTODO
CREATED:20101216T191515Z
LAST-MODIFIED:20101220T134027Z
DTSTAMP:20101220T134027Z
UID:9bd6a96c-88a0-4299-b707-2ceece81fbc5
SUMMARY:Recurring
RRULE:FREQ=DAILY
DTSTART;TZID=America/New_York:20101216T235900
DUE;TZID=America/New_York:20101216T235900
X-MOZ-GENERATION:8
SEQUENCE:2
END:VTODO
BEGIN:VTODO
CREATED:20101220T134016Z
LAST-MODIFIED:20101220T134027Z
DTSTAMP:20101220T134027Z
UID:9bd6a96c-88a0-4299-b707-2ceece81fbc5
SUMMARY:Recurring
STATUS:COMPLETED
RECURRENCE-ID;TZID=America/New_York:20101220T235900
DTSTART;TZID=America/New_York:20101220T235900
DUE;TZID=America/New_York:20101220T235900
COMPLETED:20101220T134027Z
PERCENT-COMPLETE:100
SEQUENCE:3
X-MOZ-GENERATION:8
END:VTODO
BEGIN:VTODO
CREATED:20101217T174900Z
LAST-MODIFIED:20101220T150223Z
DTSTAMP:20101220T150223Z
UID:830f283d-ee02-4acd-8e94-157a3c884acd
SUMMARY:garbage
RRULE:FREQ=WEEKLY
DTSTART;TZID=America/New_York:20101220T235900
DUE;TZID=America/New_York:20101220T235900
SEQUENCE:2
X-MOZ-GENERATION:4
END:VTODO

Right file:

BEGIN:VTODO
EXDATE:20101218T120000Z
EXDATE:20101219T120000Z
EXDATE:20101220T120000Z
DTSTART;TZID=America/New_York:20101216T235900
DUE;TZID=America/New_York:20101216T235900
X-MOZ-GENERATION:8
SEQUENCE:2
END:VTODO
BEGIN:VTODO
CREATED:20101217T174900Z
LAST-MODIFIED:20101220T150223Z
DTSTAMP:20101220T150223Z
UID:830f283d-ee02-4acd-8e94-157a3c884acd
SUMMARY:garbage
RRULE:FREQ=WEEKLY
DTSTART;TZID=America/New_York:20101220T235900
DUE;TZID=America/New_York:20101220T235900
SEQUENCE:2
X-MOZ-GENERATION:4
END:VTODO

[Aaron]

Hello,

Thanks for the example files and use case. I will add this to our collection of test files. As it is, our alignment is a heuristic and may not always align perfectly. You can use the right click "Align With" option to manually fix issues like this if they crop up.

Adding Syntax-aware alignment is on our wishlist, and I've added your files to that case.

[Pete]

Thanks, Aaron. Now please stop working and enjoy Christmas.

[Aaron]

Thanks, Pete. I hope you had a great holiday and upcoming New Year.