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Add Emacs' imenu support in notmuch-show and notmuch-search

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Emacs' major modes can facilitate navigation in their buffers by
supporting Imenu. In such major modes, launching Imenu (M-x imenu)
makes Emacs display a list of items (e.g., function definitions in a
code buffer). Selecting an item from this list moves point to this
item.

This patch adds Imenu support to both notmuch-show and notmuch-search
buffers:

* in notmuch-show, Imenu will present a list of all messages in the
  currently visible thread;

* in notmuch-search, Imenu will present a list of all messages in the
  search buffer.
This commit is contained in:
Damien Cassou 2017-06-12 15:30:10 +02:00 committed by David Bremner
parent 1ec634461e
commit a83ab29930
2 changed files with 46 additions and 4 deletions
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23
emacs/notmuch-show.el
View file

@ -1516,7 +1516,11 @@ All currently available key bindings:
\\{notmuch-show-mode-map}"
(setq notmuch-buffer-refresh-function #'notmuch-show-refresh-view)
(setq buffer-read-only t
truncate-lines t))
truncate-lines t)
(setq imenu-prev-index-position-function
#'notmuch-show-imenu-prev-index-position-function)
(setq imenu-extract-index-name-function
#'notmuch-show-imenu-extract-index-name-function))
(defun notmuch-tree-from-show-current-query ()
"Call notmuch tree with the current query"
@ -2465,6 +2469,23 @@ the new buffer."
(mailcap-mime-types) nil nil nil nil "text/plain")))
(notmuch-show-apply-to-current-part-handle #'notmuch-show--mm-display-part mime-type))
(defun notmuch-show-imenu-prev-index-position-function ()
"Move point to previous message in notmuch-show buffer.
This function is used as a value for
`imenu-prev-index-position-function'."
(if (bobp)
nil
(notmuch-show-previous-message)
t))
(defun notmuch-show-imenu-extract-index-name-function ()
"Return imenu name for line at point.
This function is used as a value for
`imenu-extract-index-name-function'. Point should be at the
beginning of the line."
(back-to-indentation)
(buffer-substring-no-properties (point) (line-end-position)))
(provide 'notmuch-show)
;;; notmuch-show.el ends here

27
emacs/notmuch.el
View file

@ -374,7 +374,11 @@ Complete list of currently available key bindings:
(set (make-local-variable 'scroll-preserve-screen-position) t)
(add-to-invisibility-spec (cons 'ellipsis t))
(setq truncate-lines t)
(setq buffer-read-only t))
(setq buffer-read-only t)
(setq imenu-prev-index-position-function
#'notmuch-search-imenu-prev-index-position-function)
(setq imenu-extract-index-name-function
#'notmuch-search-imenu-extract-index-name-function))
(defun notmuch-search-get-result (&optional pos)
"Return the result object for the thread at POS (or point).
@ -1094,8 +1098,8 @@ notmuch buffers exist, run `notmuch'."
;; Find the first notmuch buffer.
(setq first (loop for buffer in (buffer-list)
if (notmuch-interesting-buffer buffer)
return buffer))
if (notmuch-interesting-buffer buffer)
return buffer))
(if first
;; If the first one we found is any other than the starting
@ -1104,6 +1108,23 @@ notmuch buffers exist, run `notmuch'."
(switch-to-buffer first))
(notmuch))))
;;;; Imenu Support
(defun notmuch-search-imenu-prev-index-position-function ()
"Move point to previous message in notmuch-search buffer.
This function is used as a value for
`imenu-prev-index-position-function'."
(notmuch-search-previous-thread))
(defun notmuch-search-imenu-extract-index-name-function ()
"Return imenu name for line at point.
This function is used as a value for
`imenu-extract-index-name-function'. Point should be at the
beginning of the line."
(let ((subject (notmuch-search-find-subject))
(author (notmuch-search-find-authors)))
(format "%s (%s)" subject author)))
(setq mail-user-agent 'notmuch-user-agent)
(provide 'notmuch)