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+In-Reply-To: <87lhos5duu.fsf@nikula.org>\r
+References:\r
+ <CAHc2pO2_mQZzG7TqntSLEY78YEZSVEwDSesgpCn1ZbngJvM0dQ@mail.gmail.com>\r
+ <87lhos5duu.fsf@nikula.org>\r
+Date: Tue, 7 Oct 2014 18:04:09 +0400\r
+Message-ID:\r
+ <CAHc2pO2J6-UMVnLx3dSGns1z4aaxSZZdGfVNVtetcex9xbsCKQ@mail.gmail.com>\r
+Subject: Re: Backward scrolling notmuch_messages_t and notmuch_threads_t\r
+From: Sergei Shilovsky <sshilovsky@gmail.com>\r
+To: Jani Nikula <jani@nikula.org>\r
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+\r
+notmuch search --offset` simply skips the number of threads/messages.\r
+This is not so fast if the offset is large.\r
+\r
+ 98 for (i =3D 0;\r
+ 99 notmuch_threads_valid (threads) && (limit < 0 || i <\r
+offset + limit );\r
+100 notmuch_threads_move_to_next (threads), i++)\r
+101 {\r
+102 thread =3D notmuch_threads_get (threads);\r
+103\r
+104 if (i < offset) {\r
+105 notmuch_thread_destroy (thread);\r
+106 continue;\r
+107 }\r
+\r
+On Tue, Oct 7, 2014 at 3:16 PM, Jani Nikula <jani@nikula.org> wrote:\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
+>> --\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=\r
+=81=D0=BA=D0=B8=D0=B9\r
+>> Sergei Shilovsky\r
+>> _______________________________________________\r
+>> notmuch mailing list\r
+>> notmuch@notmuchmail.org\r
+>> http://notmuchmail.org/mailman/listinfo/notmuch\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
projects / notmuch-archives.git / commitdiff