From: Sergei Shilovsky Date: Tue, 7 Oct 2014 11:00:47 +0000 (+0400) Subject: Backward scrolling notmuch_messages_t and notmuch_threads_t X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=d918a91d25003a94237ebbbc50524a722f9be914;p=notmuch-archives.git Backward scrolling notmuch_messages_t and notmuch_threads_t --- diff --git a/cc/40c4a2f6d6f7676d161c3f6f8155d6206344c2 b/cc/40c4a2f6d6f7676d161c3f6f8155d6206344c2 new file mode 100644 index 000000000..f4a973b3b --- /dev/null +++ b/cc/40c4a2f6d6f7676d161c3f6f8155d6206344c2 @@ -0,0 +1,89 @@ +Return-Path: +X-Original-To: notmuch@notmuchmail.org +Delivered-To: notmuch@notmuchmail.org +Received: from localhost (localhost [127.0.0.1]) + by olra.theworths.org (Postfix) with ESMTP id 156BE431FB6 + for ; Tue, 7 Oct 2014 04:00:52 -0700 (PDT) +X-Virus-Scanned: Debian amavisd-new at olra.theworths.org +X-Spam-Flag: NO +X-Spam-Score: -0.799 +X-Spam-Level: +X-Spam-Status: No, score=-0.799 tagged_above=-999 required=5 + tests=[DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, + FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7] autolearn=disabled +Received: from olra.theworths.org ([127.0.0.1]) + by localhost (olra.theworths.org [127.0.0.1]) (amavisd-new, port 10024) + with ESMTP id friTSaOC8CSI for ; + Tue, 7 Oct 2014 04:00:48 -0700 (PDT) +Received: from mail-oi0-f51.google.com (mail-oi0-f51.google.com + [209.85.218.51]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) + (No client certificate requested) + by olra.theworths.org (Postfix) with ESMTPS id AA294431FAF + for ; Tue, 7 Oct 2014 04:00:48 -0700 (PDT) +Received: by mail-oi0-f51.google.com with SMTP id h136so2161387oig.10 + for ; Tue, 07 Oct 2014 04:00:47 -0700 (PDT) +DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; + h=mime-version:reply-to:date:message-id:subject:from:to:content-type + :content-transfer-encoding; + bh=LqB8w9rvkWjX4kLN3rLTwjVOYzv6MwfdCXYqhZvFIkg=; + b=luqqHshEDKqBTBAJPIljHNzZDeKjh0IPiepv9Evh1kpSF8ypiI4nENNwUINNwDIRAi + hoPME1pM3NciQz+1pep/RP7eK9dNlG3erwI27H4FguzWnmfpRu6pVaG/VvtNQVrJqQI8 + GFnrH0Q2wvPEOmIOLlCIsMgk2uw2YHcG7nRrl43sjAWNeoZI8bPKtpe1Y28UPxNdt+Pr + IL0SC1+VWT491hD9vsrtfafOtNWfmhe7B/vJQh6q5J2yFAlrGIYH3IQPtjXDO6VShMHW + xyKiYelQG69dNn+95Zb9Knk2cV5fsRN9DhBkjzQYIP0Sm3xWpTjU52hEc3EQOH9fJyAu + r9EQ== +MIME-Version: 1.0 +X-Received: by 10.182.191.102 with SMTP id gx6mr3013513obc.60.1412679647129; + Tue, 07 Oct 2014 04:00:47 -0700 (PDT) +Received: by 10.76.41.3 with HTTP; Tue, 7 Oct 2014 04:00:47 -0700 (PDT) +Date: Tue, 7 Oct 2014 15:00:47 +0400 +Message-ID: + +Subject: Backward scrolling notmuch_messages_t and notmuch_threads_t +From: Sergei Shilovsky +To: notmuch@notmuchmail.org +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: quoted-printable +X-BeenThere: notmuch@notmuchmail.org +X-Mailman-Version: 2.1.13 +Precedence: list +Reply-To: sshilovsky@gmail.com +List-Id: "Use and development of the notmuch mail system." + +List-Unsubscribe: , + +List-Archive: +List-Post: +List-Help: +List-Subscribe: , + +X-List-Received-Date: Tue, 07 Oct 2014 11:00:52 -0000 + +Lets consider messages first. + +As far as I get there is no straightforward +notmuch_messages_move_to_previous. One can usually implement such +behaviour with caching previous messages which is slightly inefficient +in memory consumption terms. + +But we can sort messages either date asc or date desc. + +Suppose, we're currently at the 1000th message in query "tag:whatever". + +So if we need to go to the previous message we could do something like + + notmuch search --sort=3Doldest-first tag:whatever and \ + date:.. + +This query's result should start with our 1000th message following its +previous message (in terms of the original request). So backward +scrolling with no cache looks to be at least possible. + +Any idea of would that be fine? Is it possible to implement similar +thing at low-level? + +--=20 +=D0=A1 =D1=83=D0=B2=D0=B0=D0=B6=D0=B5=D0=BD=D0=B8=D0=B5=D0=BC, +=D0=A1=D0=B5=D1=80=D0=B3=D0=B5=D0=B9 =D0=A8=D0=B8=D0=BB=D0=BE=D0=B2=D1=81= +=D0=BA=D0=B8=D0=B9 +Sergei Shilovsky