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emacs: Optionally retain the state of the buffer during `notmuch-show-refresh-view'.

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With an argument, record and reply the state of the buffer during
`notmuch-show-refresh-view'.

In this context, "state" is defined as:
 - the open/closed state of each message,
 - the current message.

Traditional use of refresh with the = key does not retain the
state. The recently introduced toggle commands ($, !, < and >) do
retain the state.
This commit is contained in:
David Edmondson 2012-02-08 08:02:16 +00:00 committed by David Bremner
parent 7bcab5d645
commit 48766fca71
1 changed files with 48 additions and 8 deletions
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56
emacs/notmuch-show.el
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@ -952,7 +952,7 @@ current buffer, if possible."
(message (if notmuch-show-process-crypto
"Processing cryptographic MIME parts."
"Not processing cryptographic MIME parts."))
(notmuch-show-refresh-view))
(notmuch-show-refresh-view t))
(defun notmuch-show-toggle-elide-non-matching ()
"Toggle the display of non-matching messages."
@ -961,7 +961,7 @@ current buffer, if possible."
(message (if notmuch-show-elide-non-matching-messages
"Showing matching messages only."
"Showing all messages."))
(notmuch-show-refresh-view))
(notmuch-show-refresh-view t))
(defun notmuch-show-toggle-thread-indentation ()
"Toggle the indentation of threads."
@ -970,7 +970,7 @@ current buffer, if possible."
(message (if notmuch-show-indent-content
"Content is indented."
"Content is not indented."))
(notmuch-show-refresh-view))
(notmuch-show-refresh-view t))
(defun notmuch-show-insert-tree (tree depth)
"Insert the message tree TREE at depth DEPTH in the current thread."
@ -1074,14 +1074,54 @@ function is used."
(notmuch-show-mark-read)))
(defun notmuch-show-refresh-view ()
(defun notmuch-show-capture-state ()
"Capture the state of the current buffer.
This includes:
- the list of open messages,
- the current message."
(list (notmuch-show-get-message-id) (notmuch-show-get-message-ids-for-open-messages)))
(defun notmuch-show-apply-state (state)
"Apply STATE to the current buffer.
This includes:
- opening the messages previously opened,
- closing all other messages,
- moving to the correct current message."
(let ((current (car state))
(open (cadr state)))
;; Open those that were open.
(goto-char (point-min))
(loop do (notmuch-show-message-visible (notmuch-show-get-message-properties)
(member (notmuch-show-get-message-id) open))
until (not (notmuch-show-goto-message-next)))
;; Go to the previously open message.
(goto-char (point-min))
(unless (loop if (string= current (notmuch-show-get-message-id))
return t
until (not (notmuch-show-goto-message-next)))
(goto-char (point-min))
(message "Previously current message not found."))
(notmuch-show-message-adjust)))
(defun notmuch-show-refresh-view (&optional retain-state)
"Refresh the current view.
Refreshes the current view, observing changes in cryptographic preferences."
Refreshes the current view, observing changes in display
preferences. If RETAIN-STATE is non-nil then the state of the
buffer is stored and re-applied after the refresh."
(interactive)
(let ((inhibit-read-only t))
(erase-buffer))
(notmuch-show-worker))
(let ((inhibit-read-only t)
state)
(if retain-state
(setq state (notmuch-show-capture-state)))
(erase-buffer)
(notmuch-show-worker)
(if state
(notmuch-show-apply-state state))))
(defvar notmuch-show-stash-map
(let ((map (make-sparse-keymap)))