;;; bookmark-conf.el --- My configurations for bookmark  -*- lexical-binding: t; -*-

;; Copyright (C) 2021  Durand

;; Author: Durand <mmemmew@gmail.com>
;; Keywords: convenience

;; 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:

;; My configurations for bookmarks.

;;; Code:

;; dependency of blist

(use-package "ilist" 'ilist)

(use-package "blist" 'blist)

;;; replace the original key-binding

(define-key ctl-x-r-map (vector ?l) #'blist-list-bookmarks)

;;; Customizations

;;;; I am not an expert

;; I prefer not being an expert now, as deleting bookmarks is quite
;; dangerous for me, as I start to depend my workflow on these
;; bookmarks.  It might be difficult to restore the bookmark of a PDF
;; file deeply buried somewhere inside my file system, if I
;; accidentally delete it.

(setq blist-expert nil)

;;;; Discard empty groups

(setq blist-discard-empty-p t)

;;;; I love cycling

(setq blist-movement-cycle t)

;;;; Filter groups

(setq
 blist-filter-groups
 (list
  (cons "PDF" #'blist-pdf-p)
  (cons "Eshell" #'blist-eshell-p)
  (cons "ELisp" #'blist-elisp-p)
  (cons "Gnus" #'blist-gnus-p)
  (cons "EWW" #'blist-eww-p)
  (cons "Info" #'blist-info-p)
  (cons "Org" #'blist-org-p)
  (cons "C" #'blist-c-p)
  (cons "Default" #'blist-default-p)))

;;; More bookmark groups

;;;; Gnus group

;; There seems to be only two GNUS bookmark handlers (or one?)
(blist-define-criterion "gnus" "Gnus"
  (memq (bookmark-get-handler bookmark)
        (list #'gnus-summary-bookmark-jump
              #'gnus-bookmark-jump)))

;;;; EWW group

(blist-define-criterion "eww" "EWW"
  (eq (bookmark-get-handler bookmark)
      #'durand-eww-bookmark-jump))

;;;; Info group

(blist-define-criterion "info" "Info"
  (eq (bookmark-get-handler bookmark)
      #'Info-bookmark-jump))

;;;; PDF group

(blist-define-criterion "pdf" "PDF"
  (eq (bookmark-get-handler bookmark)
      #'pdf-view-bookmark-jump-handler))

;;;; Org group

(defvar org-directory)

(blist-define-criterion "org" "Org"
  (let ((location (blist-get-location bookmark)))
    (or
     (string-match-p
      "\\.org$" location)
     (and
      (file-directory-p (or org-directory "/non-existing"))
      (file-in-directory-p location org-directory)))))

;;;; C group

(blist-define-criterion "c" "C"
  ;; `rx' is a macro, so that we don't have to compute the regular
  ;; expression every time we match a line.
  (string-match-p
   (rx
    (or
     (seq ".c"
          (zero-or-one "pp")
          eos)
     (seq ".h"
          (zero-or-one "pp")
          eos)))
   (blist-get-location bookmark)))

;;;; ELisp group

(blist-define-criterion "elisp" "ELisp"
  (string-match-p "\\.el$" (blist-get-location bookmark)))

;;; Fit annotations buffer to window

(defun durand-bookmark-jump-fit-to-window (&rest _args)
  "Fit the annotations buffer to its window, if needed.
ARGS are ignored."
  (let ((window (get-buffer-window "*Bookmark Annotation*")))
    (cond
     ((and window (windowp window) (window-live-p window))
      (durand-fit-window-to-buffer-with-max
       window)))))

(advice-add #'bookmark-jump
            :after
            #'durand-bookmark-jump-fit-to-window)

(provide 'bookmark-conf)
;;; bookmark-conf.el ends here