Re: [Evolution] "Include threads:" setting for Search Folders?

[Milan Crha <mcrha redhat com>]

On Mon, 2017-10-30 at 21:58 -0700, Paul Rozdeba wrote:
> Find items which match: any of the following conditions
> Message location: is <account>/Inbox
> Automatically update on any source folder change (checked)
> Search folder sources: All local and active remote folders

        Hi,
we had some talk about this on IRC with Paul too. I'm not going to copy
it here, that would not make much sense. I'll comment on the above
settings only.

I believe, and your tests prove it, that the Message Location option
has a precedence over the Include Threads option. That means, even if
you let the search folder use all accounts and folders, it first
ignores all but the Inbox folder. After that it gets all these messages
and tries to find also thread-related messages which would otherwise be
hidden.

I tried a similar settings here and avoiding the Message Location makes
it work (I replaced it with "Sender contains", then made it to show
"All related" thread messages).

About the respective Include Threads options, I also do not exactly
know what they do, but if I'd guess, then, for satisfied messages:
   All related - shows whole thread
   Replies - thread subtree
   Replies and parents - thread subtree and path up
   No reply or parent - side branches

Imagine a thread like this:

   A
    B
    |-C (chosen)
    |  D
    |  |-E
    |  F
    G
     H

Then when only C message is chosen by the filter (aka the C satisfies
the filter options), then the Include Threads adds other messages as:
   All related - whole thread
   Replies - C,D,E,F
   Replies and parents - A,B,C,D,E,F
   No reply or parent - C,G,H
Though I'm quite unsure what the last option would be good for, thus
one might better test the actual behavior than just guess, as I did.
        Bye,
        Milan