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List:       alpine-info
Subject:    [Alpine-info] Alpine folder collection behavior with dual-use
From:       Mark Crispin <mrc+uw () panda ! com>
Date:       2009-10-06 23:13:10
Message-ID: alpine.OSX.2.00.0910061556300.93829 () hsinghsing ! panda ! com
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Consider a folder collection on the server defined as "[]" (thus all 
mailboxes).  The server returns the following:

 	* LIST (\HasNoChildren) "/" boxA
 	* LIST (\HasChildren \NoSelect) "/" dirB
 	* LIST (\HasNoChildren) "/" INBOX
 	* LIST (\HasChildren) "/" boxC

In the Alpine FOLDER LIST view, we will see:

 	INBOX/		boxA[/]		dirB/		boxC[/]

Since boxA and boxC are displayed identically, it appears that Alpine 
doesn't pay any attention to the children attributes.  I'm pretty sure 
that I added support for children attributes in later versions UW IMAP; 
they'd be called LATT_HASCHILDREN and LATT_HASNOCHILDREN.

However, the listing for INBOX is bizarre.  I'm guessing that there is 
explicit code in Alpine to make it impossible to access INBOX as a mailbox 
in a top-level folder collection, because if the folder collection is 
#mail/[] we get

 	* LIST (\HasNoChildren) "/" #mail/boxA
 	* LIST (\HasChildren \NoSelect) "/" #mail/dirB
 	* LIST (\HasNoChildren) "/" #mail/INBOX
 	* LIST (\HasChildren) "/" #mail/boxC

and we get the expected FOLDER LIST view:

 	INBOX[/]	boxA[/]		dirB/		boxC[/]

I never understood why Alpine (and Pine before it) felt that it was so 
important to exclude INBOX from a top-level folder collection list. 
Apparently the presumption is that the INBOX would be listed in 
incoming-folders, but that is not guaranteed to be the case.

-- Mark --

http://panda.com/mrc
Democracy is two wolves and a sheep deciding what to eat for lunch.
Liberty is a well-armed sheep contesting the vote.
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