summary refs log tree commit diff stats
path: root/lisp/acdw-org.el
blob: dfabcc7079410159dcf862721741307713aac557 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
;;; acdw-org.el -*- lexical-binding: t; coding: utf-8-unix -*-
;; Author: Various
;; URL: https://tildegit.org/acdw/emacs

;; This file is NOT part of GNU Emacs.

;;; License:
;; Everyone is permitted to do whatever with this software, without
;; limitation.  This software comes without any warranty whatsoever,
;; but with two pieces of advice:
;; - Don't hurt yourself.
;; - Make good choices.

;;; Commentary:
;; This file is for the weird little `org-mode' functions that just take up
;; space in my main init file.  I've tried to give credit where credit is due.

;;; Code:


;;; unpackaged.el: https://github.com/alphapapa/unpackaged.el

(defun acdw-org/element-descendant-of (type element)
  "Return non-nil if ELEMENT is a descendant of TYPE.
TYPE should be an element type, like `item' or `paragraph'.
ELEMENT should be a list like that returned by `org-element-context'."
  ;; MAYBE: Use `org-element-lineage'.
  (when-let* ((parent (org-element-property :parent element)))
    (or (eq type (car parent))
        (unpackaged/org-element-descendant-of type parent))))

(defun acdw-org/return-dwim (&optional default)
  "A helpful replacement for `org-return'.  With prefix, call `org-return'.

On headings, move point to position after entry content.  In
lists, insert a new item or end the list, with checkbox if
appropriate.  In tables, insert a new row or end the table."
  ;; Inspired by John Kitchin: http://kitchingroup.cheme.cmu.edu/blog/2017/04/09/A-better-return-in-org-mode/
  (interactive "P")
  ;; Auto-fill if enabled
  (when auto-fill-function
    (if (listp auto-fill-function)
        (dolist (func auto-fill-function)
          (funcall func))
      (funcall auto-fill-function)))
  (if default
      (org-return)
    (cond
     ;; Act depending on context around point.

     ;; NOTE: I prefer RET to not follow links, but by uncommenting this block, links will be
     ;; followed.

     ;; ((eq 'link (car (org-element-context)))
     ;;  ;; Link: Open it.
     ;;  (org-open-at-point-global))

     ((org-at-heading-p)
      ;; Heading: Move to position after entry content.
      ;; NOTE: This is probably the most interesting feature of this function.
      (let ((heading-start (org-entry-beginning-position)))
        (goto-char (org-entry-end-position))
        (cond ((and (org-at-heading-p)
                    (= heading-start (org-entry-beginning-position)))
               ;; Entry ends on its heading; add newline after
               (end-of-line)
               (insert "\n\n"))
              (t
               ;; Entry ends after its heading; back up
               (forward-line -1)
               (end-of-line)
               (when (org-at-heading-p)
                 ;; At the same heading
                 (forward-line)
                 (insert "\n")
                 (forward-line -1))
               ;; FIXME: looking-back is supposed to be called with more arguments.
               (while (not (looking-back (rx (repeat 3 (seq (optional blank) "\n")))))
                 (insert "\n"))
               (forward-line -1)))))

     ((org-at-item-checkbox-p)
      ;; Checkbox: Insert new item with checkbox.
      (org-insert-todo-heading nil))

     ((org-in-item-p)
      ;; Plain list
      (let* ((context (org-element-context))
             (first-item-p (eq 'plain-list (car context)))
             (itemp (eq 'item (car context)))
             (emptyp (eq (org-element-property :contents-begin context)
                         (org-element-property :contents-end context)))
             (item-child-p
              (acdw-org/element-descendant-of 'item context)))
        ;; The original function from unpackaged just tested the (or ...) test
        ;; in this cond, in an if.  However, that doesn't auto-end nested
        ;; lists.  So I made this form a cond and added the (and...) test in
        ;; the first position, which is clunky (the delete-region... stuff
        ;; comes twice) and might not be needed.  More testing, obviously, but
        ;; for now, it works well enough.
        (cond ((and itemp emptyp)
               (delete-region (line-beginning-position) (line-end-position))
               (insert "\n\n"))
              ((or first-item-p
                   (and itemp (not emptyp))
                   item-child-p)
               (org-insert-item))
              (t (delete-region (line-beginning-position) (line-end-position))
                 (insert "\n")))))

     ((when (fboundp 'org-inlinetask-in-task-p)
        (org-inlinetask-in-task-p))
      ;; Inline task: Don't insert a new heading.
      (org-return))

     ((org-at-table-p)
      (cond ((save-excursion
               (beginning-of-line)
               ;; See `org-table-next-field'.
               (cl-loop with end = (line-end-position)
                        for cell = (org-element-table-cell-parser)
                        always (equal (org-element-property :contents-begin cell)
                                      (org-element-property :contents-end cell))
                        while (re-search-forward "|" end t)))
             ;; Empty row: end the table.
             (delete-region (line-beginning-position) (line-end-position))
             (org-return))
            (t
             ;; Non-empty row: call `org-return'.
             (org-return))))
     (t
      ;; All other cases: call `org-return'.
      (org-return)))))

(defun acdw-org/fix-blank-lines (&optional prefix)
  "Ensure that blank lines exist between headings and
 between headings and their contents.  With prefix, operate on
 whole buffer. Ensures that blank lines exist after each
 headings's drawers."
  (interactive "P")
  (org-map-entries (lambda ()
                     (org-with-wide-buffer
                      ;; `org-map-entries' narrows the buffer, which
                      ;; prevents us from seeing newlines before the
                      ;; current heading, so we do this part widened.
                      (while (not (looking-back "\n\n" nil))
                        ;; Insert blank lines before heading.
                        (insert "\n")))
                     (let ((end (org-entry-end-position)))
                       ;; Insert blank lines before entry content
                       (forward-line)
                       (while (and (org-at-planning-p)
                                   (< (point) (point-max)))
                         ;; Skip planning lines
                         (forward-line))
                       (while (re-search-forward
                               org-drawer-regexp end t)
                         ;; Skip drawers. You might think that
                         ;; `org-at-drawer-p' would suffice, but for
                         ;; some reason it doesn't work correctly when
                         ;; operating on hidden text.  This works, taken
                         ;; from `org-agenda-get-some-entry-text'.
                         (re-search-forward "^[ \t]*:END:.*\n?" end t)
                         (goto-char (match-end 0)))
                       (unless (or (= (point) (point-max))
                                   (org-at-heading-p)
                                   (looking-at-p "\n"))
                         (insert "\n"))))
                   t (if prefix
                         nil
                       'tree)))

(defun acdw-org/fix-blanks-in-buffer ()
  (when (eq major-mode 'org-mode)
    (let ((current-prefix-arg 4))
      (call-interactively #'acdw-org/fix-blank-lines))))


;;; Generate custom IDs:
;; https://amitp.blogspot.com/2021/04/automatically-generate-ids-for-emacs.html

(defun acdw-org/generate-custom-ids ()
  "Generate CUSTOM_ID for any headings that are missing one."
  (let ((existing-ids (org-map-entries (lambda ()
                                         (org-entry-get nil "CUSTOM_ID")))))
    (org-map-entries
     (lambda ()
       (let* ((custom-id (org-entry-get nil "CUSTOM_ID"))
              (heading (org-heading-components))
              (level (nth 0 heading))
              (todo (nth 2 heading))
              (headline (nth 4 heading))
              (slug (acdw-org/title-to-filename headline))
              (duplicate-id (member slug existing-ids)))
         (when (and (not custom-id)
                    (< level 4)
                    (not todo)
                    (not duplicate-id))
           (message "Adding entry '%s' to '%s'" slug headline)
           (org-entry-put nil "CUSTOM_ID" slug)))))))

(defun acdw-org/title-to-filename (title)
  "Convert TITLE to a reasonable filename."
  ;; Based on the slug logic in `org-roam', but `org-roam' also uses a
  ;; timestamp, and I only use the slug.
  (setq title (s-downcase title))
  (setq title (s-replace-regexp "[^a-zA-Z0-9]+" "-" title))
  (setq title (s-replace-regexp "-+" "-" title))
  (setq title (s-replace-regexp "^-" "" title))
  (setq title (s-replace-regexp "-$" "" title))
  title)


;;; ADVICE AND TWEAKS

;; Correct `org-delete-backward-char' to use `backward-delete-char-untabify'
(defun acdw-org/delete-backward-char (N)
  "Like `delete-backward-char-untabify', insert whitespace at field end in tables.
When deleting backwards, in tables this function will insert
whitespace in front of the next \"|\" separator, to keep the
table aligned.  The table will still be marked for re-alignment
if the field did fill the entire column, because, in this case
the deletion might narrow the column."
  (interactive "p")
  (save-match-data
    (org-check-before-invisible-edit 'delete-backward)
    (if (and (= N 1)
             (not overwrite-mode)
             (not (org-region-active-p))
             (not (eq (char-before) ?|))
             (save-excursion (skip-chars-backward " \t") (not (bolp)))
             (looking-at-p ".*?|")
             (org-at-table-p))
        (progn (forward-char -1) (org-delete-char 1))
      (backward-delete-char-untabify N)
      (org-fix-tags-on-the-fly))))

(defun acdw-org/org-table-copy-down (n)
  "Like `org-table-copy-down', except instead of erroring when
  that command makes no sense, just call `org-return'."
  (interactive "p")
  (if (org-table-check-inside-data-field 'noerror)
      (org-table-copy-down n)
    (unpackaged/org-return-dwim n)))

(provide 'acdw-org)