656014 - Add a way to prevent DisplayMessage (imap)= from marking a message as read automatically

Status: RESOLVED FIXED

(MailNews Core :: Networking: IMAP, defect)

Description

[Jonathan Protzenko [:protz]]

Attachment: Two-liner that adds an extra possible parameter to the URL

This is for Thunderbird Conversations. Rationale:
- when we append messages to an existing conversation, we don't want these newly arrived messages to be marked as read ; if the user is doing something else, he might never notice these new messages when he moves on to another conversation ;
- appending a message means expanding it, so that the users figures out which messages he should read in the conversation,
- an expanded message is streamed through DisplayMessage for a number of reasons,
- DisplayMessage, on IMAP, assuming autosync hasn't kicked in, decides to mark the message as read on the server side.

This defeats the whole logic of Thunderbird Conversations. Because we're notified through the dbview that the selection has changed (a new message just arrived under the collapsed, selected thread) immediately, we often update the conversation before autosync has downloaded the messages. So that does happen.

The attached patch adds a way to fix this, which Thunderbird Conversations intends on taking advantage of.

Comment 1

[Jonathan Protzenko [:protz]]

http://hg.mozilla.org/comm-central/rev/7d96a5ff4809