Re: Backward scrolling notmuch_messages_t and notmuch_threads_t

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+       Tue, 07 Oct 2014 04:16:24 -0700 (PDT)\r
+From: Jani Nikula <jani@nikula.org>\r
+To: sshilovsky@gmail.com, notmuch@notmuchmail.org\r
+Subject: Re: Backward scrolling notmuch_messages_t and notmuch_threads_t\r
+In-Reply-To:\r
+ <CAHc2pO2_mQZzG7TqntSLEY78YEZSVEwDSesgpCn1ZbngJvM0dQ@mail.gmail.com>\r
+References:\r
+ <CAHc2pO2_mQZzG7TqntSLEY78YEZSVEwDSesgpCn1ZbngJvM0dQ@mail.gmail.com>\r
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+Date: Tue, 07 Oct 2014 13:16:41 +0200\r
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+\r
+On Tue, 07 Oct 2014, Sergei Shilovsky <sshilovsky@gmail.com> wrote:\r
+> Lets consider messages first.\r
+>\r
+> As far as I get there is no straightforward\r
+> notmuch_messages_move_to_previous. One can usually implement such\r
+> behaviour with caching previous messages which is slightly inefficient\r
+> in memory consumption terms.\r
+>\r
+> But we can sort messages either date asc or date desc.\r
+>\r
+> Suppose, we're currently at the 1000th message in query "tag:whatever".\r
+>\r
+> So if we need to go to the previous message we could do something like\r
+>\r
+>     notmuch search --sort=3Doldest-first tag:whatever and \\r
+>         date:..<here is the date of the 1000th message>\r
+>\r
+> This query's result should start with our 1000th message following its\r
+> previous message (in terms of the original request). So backward\r
+> scrolling with no cache looks to be at least possible.\r
+>\r
+> Any idea of would that be fine? Is it possible to implement similar\r
+> thing at low-level?\r
+\r
+See notmuch search --offset=3DN and --limit=3DN options.\r
+\r
+BR,\r
+Jani.\r
+\r
+\r
+>\r
+> --=20\r
+> =D0=A1 =D1=83=D0=B2=D0=B0=D0=B6=D0=B5=D0=BD=D0=B8=D0=B5=D0=BC,\r
+> =D0=A1=D0=B5=D1=80=D0=B3=D0=B5=D0=B9 =D0=A8=D0=B8=D0=BB=D0=BE=D0=B2=D1=81=\r
+=D0=BA=D0=B8=D0=B9\r
+> Sergei Shilovsky\r
+> _______________________________________________\r
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