Re: Bookmark/History DB SoC project

[Jamie McCracken <jamiemcc blueyonder co uk>]

Christian Persch wrote:
 > There is no spec for the history/bookmarks integration yet, no. All we
> have is some ideas at
> http://live.gnome.org/Epiphany/BookmarksHistoryIntegration . The firefox
> 3.0 "Places" [http://wiki.mozilla.org/Places] work goes in about the
> same direction.
>
> So the first step would be to produce a rough outline of how this should
> work. I think Peter Harvey had some ideas about this (he was also going
> to mentor an eventual SoC project about this), maybe he can help you
> here (he's rather busy atm though).

Thats fine - I wont be able to start on anything here until July at the 
earliest. So theres plenty of time for anyone to come up with such an 
outline in the meantime.

I would need to know what metadata is needed by default and this should 
be in similiar format to Tracker's file metadata spec at :
http://freedesktop.org/wiki/Standards/shared-filemetadata-spec

so I expect you will have metadata like "Bookmark.Uri" and 
"Bookmark.LastVisitedDate" etc


> One thing to keep in mind is that the history data isn't just queried
> explicitly by the user, but also (and with great frequence on pageload)
> by the browser to determine link colouring, so it needs to be *fast*. 

okay. Obviously use of Dbus is going to have a round trip latency 
associated to it if you are performing synchronous calls (I would guess 
around 2ms per round trip)

Two workarounds spring to mind:

1) Use async calls so epiphany renders links with a default colour and 
the re-colours them in a callback if its a history link.

2) We have a GetHistory method in Tracker to return all Uris as a 
GHashTable for the last X days which Epiphany can call on start up. If 
link colouring needs to be synchronous then this would be the best 
solution.


--
Mr Jamie McCracken
http://jamiemcc.livejournal.com/