Re: [RFC][PATCH v1] emacs: Replace `notmuch-search-result-format' evaluation.

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+To: David Bremner <david@tethera.net>, notmuch@notmuchmail.org\r
+Subject: Re: [RFC][PATCH v1] emacs: Replace `notmuch-search-result-format'\r
+       evaluation.\r
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+       <87ppcbdb7n.fsf@maritornes.cs.unb.ca>\r
+User-Agent: Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1\r
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+From: David Edmondson <dme@dme.org>\r
+Date: Tue, 25 Nov 2014 08:16:22 +0000\r
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+On Tue, Nov 25 2014, David Bremner wrote:\r
+>> +A symbol corresponding to an attribute of the\r
+>> + thread (e.g. `:date_relative' or `:subject').\r
+>\r
+> It'd be nice for the user to have a pointer here to figure out what\r
+> the possible attributes are.\r
+\r
+I don't believe that we currently document these anywhere. I'll add a\r
+list in the form "this will include such attributes as ...".\r
+\r
+Something that I didn't mention is that this implementation behaves\r
+differently from the current one in two ways:\r
+\r
+- The invisible authors are not available to isearch. That is, the\r
+  current implementation hides the authors that couldn't be shown in the\r
+  available space using invisible text that can be exposed during an\r
+  isearch in the buffer. This isn't done with the new implementation.\r
+\r
+- The truncation of author names is hard - they are just chopped at the\r
+  defined width (minus space for the ellipsis). The current code tries\r
+  to find a nice break point (between authors). That was done to better\r
+  support the the above feature (as isearch won't match text across a\r
+  visible/invisible boundary).\r
+\r
+The first of these is complex to fix. The current implementation relies\r
+on overlays, which in turn require direct access to the buffer where the\r
+text will be rendered. The buffer isn't available to the formatting\r
+function in the new implementation.\r
+\r
+The second could be fixed relatively straightforwardly, but without a\r
+fix for the invisible text, I'm not clear that it's useful (and in fact\r
+may be harmful).\r