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;;; jao-notmuch-tree-fold.el --- Show/hide (sub)tress in notmuch-tree -*- lexical-binding: t; -*-
;; Copyright (C) 2021 jao
;; Author: jao <mail@jao.io>
;; Keywords: mail
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(require 'jao-notmuch)
;; Show/hide threads
(defun jao-notmuch--tree-top () (notmuch-tree-get-prop :first))
(defun jao-notmuch--tree-bottom ()
(let ((line-move-ignore-invisible t))
(save-excursion
(when (zerop (forward-line 1))
(or (not (notmuch-tree-get-message-properties))
(jao-notmuch--tree-top))))))
(defun jao-notmuch-tree-hide-thread ()
(interactive)
(notmuch-tree-thread-top)
(save-excursion
(forward-line 1)
(when (not (jao-notmuch--tree-top))
(let ((line-move-ignore-invisible nil)
(inhibit-read-only t)
(p (point)))
(unless (notmuch-tree-next-thread-in-tree)
(forward-line -1))
(add-text-properties p (point) '(invisible t))))))
(defun jao-notmuch-tree-show-thread ()
(interactive)
(when (or (jao-notmuch--tree-top) (invisible-p (point)))
(let ((line-move-ignore-invisible nil))
(notmuch-tree-thread-top)
(let ((inhibit-read-only t)
(p (point)))
(notmuch-tree-next-thread-in-tree)
(remove-text-properties p (point) '(invisible nil))
(goto-char p)))))
(defun jao-notmuch-tree-show-all ()
(interactive)
(let ((inhibit-read-only t))
(put-text-property (point-min) (point-max) 'invisible nil)))
(defun jao-notmuch-tree-hide-all ()
(interactive)
(let ((inhibit-read-only t)
(line-move-ignore-invisible nil))
(goto-char (point-min))
(jao-notmuch-tree-hide-thread)
(while (notmuch-tree-next-thread-in-tree)
(jao-notmuch-tree-hide-thread)))
(goto-char (point-min)))
(defun jao-notmuch-tree-toggle-thread ()
(interactive)
(let ((line-move-ignore-invisible nil))
(forward-line 1)
(when (jao-notmuch--tree-top)
(forward-line -1))
(if (invisible-p (point))
(jao-notmuch-tree-show-thread)
(jao-notmuch-tree-hide-thread))))
(defvar notmuch-tree-thread-map
(let ((m (make-keymap "Thread operations")))
(define-key m (kbd "TAB") #'jao-notmuch-tree-toggle-thread)
(define-key m (kbd "t") #'jao-notmuch-tree-toggle-thread)
(define-key m (kbd "s") #'jao-notmuch-tree-show-thread)
(define-key m (kbd "S") #'jao-notmuch-tree-show-all)
(define-key m (kbd "h") #'jao-notmuch-tree-hide-thread)
(define-key m (kbd "H") #'jao-notmuch-tree-hide-all)
m))
(defun jao-notmuch--tree-next (prev thread no-exit)
(let ((line-move-ignore-invisible t))
(cond ((looking-at-p "^End of search results")
(unless no-exit
(notmuch-tree-close-message-window)
(notmuch-tree-quit)))
((jao-notmuch--looking-at-new-p)
(save-excursion (jao-notmuch-tree-show-thread))
(notmuch-tree-show-message nil))
(thread
(save-excursion (jao-notmuch-tree-hide-thread))
(when (notmuch-tree-next-thread prev)
(save-excursion (jao-notmuch-tree-show-thread)))
(unless (jao-notmuch--looking-at-new-p)
(notmuch-tree-matching-message prev (not no-exit))))
((or (and (not prev) (jao-notmuch--tree-bottom))
(and prev (jao-notmuch--tree-top)))
(save-excursion (jao-notmuch-tree-hide-thread))
(forward-line (if prev -1 1))
(jao-notmuch--tree-next prev nil no-exit))
((notmuch-tree-get-message-id)
(save-excursion (jao-notmuch-tree-show-thread))
(notmuch-tree-matching-message prev (not no-exit)))))
(when (notmuch-tree-get-message-id)
(notmuch-tree-show-message nil))
(jao-notmuch--tree-update-buffer-name))
(defun jao-notmuch-tree-next (thread &optional no-exit)
"Next message or thread in forest, taking care of thread visibility."
(interactive "P")
(jao-notmuch--tree-next nil thread no-exit))
(defun jao-notmuch-tree-previous (thread)
"Previous message or thread in forest, taking care of thread visibility.."
(interactive "P")
(jao-notmuch--tree-next t thread t))
(provide 'jao-notmuch-tree-fold)
;;; jao-notmuch-tree-fold.el ends here
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