With this mode, one can fold trees in the notmuch-tree buffer as if they were outlines, using all the commands provided by outline-minor-mode. We also define a couple of movement commands that, optional, will ensure that only the thread around point is unfolded.
The implementation is based on registering a :level property in the messages p-list, that is then used by outline-minor-mode to to recognise headers. --- Leftover in verson 5 removed, sorry! This version supersedes v4 (id:20220923203449.3747562-1-...@gnu.org) by dispensing with the use of invisible text. Now, if desired, notmuch-tree-outline-mode could live in its own notmuch-tree-outline-mode.el without circular deps, but i don't see a pressing need given that notmuch-tree.el is nicely outlined. Signed-off-by: jao <j...@gnu.org> --- doc/notmuch-emacs.rst | 23 ++++++ emacs/notmuch-tree.el | 180 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 203 insertions(+) diff --git a/doc/notmuch-emacs.rst b/doc/notmuch-emacs.rst index 846f5e67..b5f88a98 100644 --- a/doc/notmuch-emacs.rst +++ b/doc/notmuch-emacs.rst @@ -606,6 +606,29 @@ can be controlled by the variable ``notmuch-search-oldest-first``. See also :el:defcustom:`notmuch-search-result-format` and :el:defcustom:`notmuch-unthreaded-result-format`. +It is also possible to enable outlines in notmuch tree buffers, via +``notmuch-tree-outline-mode``. + +|docstring::notmuch-tree-outline-mode| + +The behaviour of this minor mode is affected by the following +customizable variables: + +.. el:defcustom:: notmuch-tree-outline-enabled + + |docstring::notmuch-tree-outline-enabled| + +.. el:defcustom:: notmuch-tree-outline-visibility + + |docstring::notmuch-tree-outline-visibility| + +.. el:defcustom:: notmuch-tree-outline-auto-close + + |docstring::notmuch-tree-outline-auto-close| + +.. el:defcustom:: notmuch-tree-outline-open-on-next + + |docstring::notmuch-tree-outline-open-on-next| .. _notmuch-unthreaded: diff --git a/emacs/notmuch-tree.el b/emacs/notmuch-tree.el index b3c2c992..47bd17bc 100644 --- a/emacs/notmuch-tree.el +++ b/emacs/notmuch-tree.el @@ -1034,6 +1034,8 @@ message together with all its descendents." (setq msg (plist-put msg :first (and first (eq 0 depth)))) (setq msg (plist-put msg :tree-status tree-status)) (setq msg (plist-put msg :orig-tags (plist-get msg :tags))) + (setq msg (plist-put msg + :level (1+ (if (and (eq 0 depth) (not first)) 1 depth)))) (notmuch-tree-goto-and-insert-msg msg) (pop tree-status) (pop tree-status) @@ -1278,6 +1280,184 @@ search results and that are also tagged with the given TAG." nil notmuch-search-oldest-first))) +;;; Tree outline mode +;;;; Custom variables +(defcustom notmuch-tree-outline-enabled nil + "Whether to automatically activate `notmuch-tree-outline-mode' in tree views." + :type 'boolean) + +(defcustom notmuch-tree-outline-visibility 'hide-others + "Default state of the forest outline for `notmuch-tree-outline-mode'. + +This variable controls the state of a forest initially and after +a movement command. If set to nil, all trees are displayed while +the symbol hide-all indicates that all trees in the forest should +be folded and hide-other that only the first one should be +unfolded." + :type '(choice (const :tag "Show all" nil) + (const :tag "Hide others" hide-others) + (const :tag "Hide all" hide-all))) + +(defcustom notmuch-tree-outline-auto-close nil + "Close message and tree windows when moving past the last message." + :type 'boolean) + +(defcustom notmuch-tree-outline-open-on-next nil + "Open new messages under point if they are closed when moving to next one. + +When this flag is set, using the command +`notmuch-tree-outline-next' with point on a header for a new +message that is not shown will open its `notmuch-show' buffer +instead of moving point to next matching message." + :type 'boolean) + +;;;; Helper functions +(defsubst notmuch-tree-outline--pop-at-end (pop-at-end) + (if notmuch-tree-outline-auto-close (not pop-at-end) pop-at-end)) + +(defun notmuch-tree-outline--enable-mode () + (when notmuch-tree-outline-enabled (notmuch-tree-outline-mode 1))) + +(add-hook 'notmuch-tree-mode-hook #'notmuch-tree-outline--enable-mode) + +(defun notmuch-tree-outline--set-visibility () + (when (and notmuch-tree-outline-mode (> (point-max) (point-min))) + (cond ((eq notmuch-tree-outline-visibility 'hide-others) + (notmuch-tree-outline-hide-others)) + ((eq notmuch-tree-outline-visibility 'hide-all) + (outline-hide-body))))) + +(defun notmuch-tree-outline--on-exit (proc) + (when (eq (process-status proc) 'exit) + (notmuch-tree-outline--set-visibility))) + +(add-hook 'notmuch-tree-process-exit-functions #'notmuch-tree-outline--on-exit) + +(defsubst notmuch-tree-outline--level (&optional props) + (or (plist-get (or props (notmuch-tree-get-message-properties)) :level) 0)) + +(defsubst notmuch-tree-outline--message-open-p () + (and (buffer-live-p notmuch-tree-message-buffer) + (get-buffer-window notmuch-tree-message-buffer) + (string-match-p (regexp-quote (or (notmuch-tree-get-message-id) "")) + (buffer-name notmuch-tree-message-buffer)))) + +(defsubst notmuch-tree-outline--at-original-match-p () + (and (notmuch-tree-get-prop :match) + (equal (notmuch-tree-get-prop :orig-tags) + (notmuch-tree-get-prop :tags)))) + +(defun notmuch-tree-outline--next (prev thread pop-at-end &optional open-new) + (cond (thread + (notmuch-tree-thread-top) + (if prev + (outline-backward-same-level 1) + (outline-forward-same-level 1)) + (when (> (notmuch-tree-outline--level) 0) (outline-show-branches)) + (notmuch-tree-outline--next nil nil pop-at-end t)) + ((and (or open-new notmuch-tree-outline-open-on-next) + (notmuch-tree-outline--at-original-match-p) + (not (notmuch-tree-outline--message-open-p))) + (notmuch-tree-outline-hide-others t)) + (t (outline-next-visible-heading (if prev -1 1)) + (unless (notmuch-tree-get-prop :match) + (notmuch-tree-matching-message prev pop-at-end)) + (notmuch-tree-outline-hide-others t)))) + +;;;; User commands +(defun notmuch-tree-outline-hide-others (&optional and-show) + "Fold all threads except the one around point. +If AND-SHOW is t, make the current message visible if it's not." + (interactive) + (save-excursion + (while (and (not (bobp)) (> (notmuch-tree-outline--level) 1)) + (outline-previous-heading)) + (outline-hide-sublevels 1)) + (when (> (notmuch-tree-outline--level) 0) + (outline-show-subtree) + (when and-show (notmuch-tree-show-message nil)))) + +(defun notmuch-tree-outline-next (&optional pop-at-end) + "Next matching message in a forest, taking care of thread visibility. +A prefix argument reverses the meaning of `notmuch-tree-outline-auto-close'." + (interactive "P") + (let ((pop (notmuch-tree-outline--pop-at-end pop-at-end))) + (if (null notmuch-tree-outline-visibility) + (notmuch-tree-matching-message nil pop) + (notmuch-tree-outline--next nil nil pop)))) + +(defun notmuch-tree-outline-previous (&optional pop-at-end) + "Previous matching message in forest, taking care of thread visibility. +With prefix, quit the tree view if there is no previous message." + (interactive "P") + (if (null notmuch-tree-outline-visibility) + (notmuch-tree-prev-matching-message pop-at-end) + (notmuch-tree-outline--next t nil pop-at-end))) + +(defun notmuch-tree-outline-next-thread () + "Next matching thread in forest, taking care of thread visibility." + (interactive) + (if (null notmuch-tree-outline-visibility) + (notmuch-tree-next-thread) + (notmuch-tree-outline--next nil t nil))) + +(defun notmuch-tree-outline-previous-thread () + "Previous matching thread in forest, taking care of thread visibility." + (interactive) + (if (null notmuch-tree-outline-visibility) + (notmuch-tree-prev-thread) + (notmuch-tree-outline--next t t nil))) + +;;;; Mode definition +(defvar notmuch-tree-outline-mode-lighter nil + "The lighter mark for notmuch-tree-outline mode. +Usually empty since outline-minor-mode's lighter will be active.") + +(define-minor-mode notmuch-tree-outline-mode + "Minor mode allowing message trees to be folded as outlines. + +When this mode is set, each thread and subthread in the results +list is treated as a foldable section, with its first message as +its header. + +The mode just makes available in the tree buffer all the +keybindings in `outline-minor-mode', and binds the following +additional keys: + +\\{notmuch-tree-outline-mode-map} + +The customizable variable `notmuch-tree-outline-visibility' +controls how navigation in the buffer is affected by this mode: + + - If it is set to nil, `notmuch-tree-outline-previous', + `notmuch-tree-outline-next', and their thread counterparts + behave just as the corresponding notmuch-tree navigation keys + when this mode is not enabled. + + - If, on the other hand, `notmuch-tree-outline-visibility' is + set to a non-nil value, these commands hiding the outlines of + the trees you are not reading as you move to new messages. + +To enable notmuch-tree-outline-mode by default in all +notmuch-tree buffers, just set +`notmuch-tree-outline-mode-enabled' to t." + :lighter notmuch-tree-outline-mode-lighter + :keymap `((,(kbd "TAB") . outline-cycle) + (,(kbd "M-TAB") . outline-cycle-buffer) + ("n" . notmuch-tree-outline-next) + ("p" . notmuch-tree-outline-previous) + (,(kbd "M-n") . notmuch-tree-outline-next-thread) + (,(kbd "M-p") . notmuch-tree-outline-previous-thread)) + (outline-minor-mode notmuch-tree-outline-mode) + (unless (derived-mode-p 'notmuch-tree-mode) + (user-error "notmuch-tree-outline-mode is only meaningful for notmuch trees!")) + (if notmuch-tree-outline-mode + (progn (setq-local outline-regexp "^[^\n]+" + outline-level #'notmuch-tree-outline--level) + (notmuch-tree-outline--set-visibility)) + (setq-local outline-regexp (default-value 'outline-regexp) + outline-level (default-value 'outline-level)))) + ;;; _ (provide 'notmuch-tree) -- 2.37.2 _______________________________________________ notmuch mailing list -- notmuch@notmuchmail.org To unsubscribe send an email to notmuch-le...@notmuchmail.org