This commit makes two changes. The first allows the user to override
an external completion method with the internal notmuch address based
completion for an individual buffer.
Secondly, if the user has company-mode enabled then it sets up company
mode (based on internal completion) but disables the automatic timeout
completion -- the user can still activate it in when desired with
standard company commands such as company-complete.
This commit lets the user customize the address completion. It makes
two changes.
The first change controls whether to build the address completion list
based on messages you have sent or you have received (the latter is
much faster).
The second change add a possible filter query to limit the messages
used -- for example, setting this to date:1y.. would limit the
address completions to addresses used in the last year. This speeds up
the address harvest and may also make the search less cluttered as old
addresses may well no longer be valid.
Many of the external links found in the notmuch source can be resolved
using https instead of http. This changeset addresses as many as i
could find, without touching the e-mail corpus or expected outputs
found in tests.
When company-mode is available (Emacs >= 24), address completion
candidates are shown in a nice popup box. This is triggered either by
pressing TAB or by waiting a while during typing an address. The
completion is based entirely on the asynchronous address harvesting
from notmuch-address.el so the GUI is theoretically not blocked for
long time.
The completion works similarly as the TAB-initiated completion from
notmuch-address.el, i.e. quick harvest based on user input is executed
first and only after full harvesting is finished, in-memory cached data
is used.
[Improved by David Bremner]
