In a header, circular completions are assigned to `C-cTAB'. Circular completion means that a value of alist is replaced by the next value of the list. The end of the list is considered continuous to the top of the list. Circular completions in a header are different for each field as follows:
<Circular completion of domain name>
On a field where addresses are written, use `C-cTAB' for domain completion. Candidates are selected from `mew-mail-domain-list'.
To: kazu@`C-cTAB'
If you try to complete just after "@" as up above, the first domain of `mew-mail-domain-list' is inserted.
To: kazu@mew.org`C-cTAB'
After completion, one more type of `C-cTAB' inserts the next domain of `mew-mail-domain-list'. This completion is looped.
To: kazu@wide.ad.jp
If a candidate can be solely decided, it is inserted.
To: kazu@w`C-cTAB'
The example up above gets:
To: kazu@wide.ad.jp
<Circular completion of From:>
On the From: field, `C-cTAB' circularly completes its value from `mew-from-list'. The first value of the list (aka `mew-from') may have already inserted as follow:
From: Kazu Yamamoto <Kazu@Mew.org>
Typing `C-cTAB' anywhere on the value replaces the value with the next value of `mew-from-list'. For example,
From: Kazu Yamamoto <Kazu@Mew.org>`C-cTAB'
becames as follows:
From: Kazuhiko Yamamoto <kazu@wide.ad.jp>
You can define association of field key and circular completion function in `mew-field-circular-completion-switch'. The following declaration is used by default.
(defvar mew-field-circular-completion-switch
'(("To:" . mew-circular-complete-domain)
("Cc:" . mew-circular-complete-domain)
("Dcc:" . mew-circular-complete-domain)
("Bcc:" . mew-circular-complete-domain)
("Reply-To:" . mew-circular-complete-domain)
("Resent-To:" . mew-circular-complete-domain)
("Resent-Cc:" . mew-circular-complete-domain)
("From:" . mew-circular-complete-from)
("Resent-From:" . mew-circular-complete-from)
("Config:" . mew-circular-complete-config)))
Please refer to See section Config to know circular completion for Config:.