-
-
Notifications
You must be signed in to change notification settings - Fork 4
/
org-roam-link.el
324 lines (296 loc) · 13 KB
/
org-roam-link.el
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
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
;;; org-roam-link.el --- Custom links for Org-roam -*- coding: utf-8; lexical-binding: t; -*-
;; Copyright © 2020 Jethro Kuan <[email protected]>
;; Alan Carroll
;; Author: Jethro Kuan <[email protected]>
;; URL: https://github.com/org-roam/org-roam
;; Keywords: org-mode, roam, convenience
;; Version: 1.2.3
;; Package-Requires: ((emacs "26.1") (dash "2.13") (f "0.17.2") (s "1.12.0") (org "9.3") (emacsql "3.0.0") (emacsql-sqlite3 "1.0.2"))
;; This file is NOT part of GNU Emacs.
;; 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, 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 GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;
;; This adds the custom `roam:' link to Org-roam. `roam:' links allow linking to
;; Org-roam files via their titles and headlines.
;;
;;; Code:
;;;; Dependencies
(require 'ol)
(require 'org-roam-compat)
(require 'org-roam-macs)
(require 'org-roam-db)
(require 'org-element)
(defvar org-roam-completion-ignore-case)
(defvar org-roam-directory)
(declare-function org-roam--find-file "org-roam")
(declare-function org-roam-find-file "org-roam")
(declare-function org-roam-format-link "org-roam")
(defcustom org-roam-link-auto-replace t
"When non-nil, replace Org-roam's roam links with file/id equivalents."
:group 'org-roam
:type 'boolean)
(defcustom org-roam-link-file-path-type 'relative
"How the path name in file links should be stored.
Valid values are:
relative Relative to the current directory, i.e. the directory of the file
into which the link is being inserted.
absolute Absolute path, if possible with ~ for home directory.
noabbrev Absolute path, no abbreviation of home directory."
:group 'org-roam
:type '(choice
(const relative)
(const absolute)
(const noabbrev))
:safe #'symbolp)
;;; the roam: link
(org-link-set-parameters "roam"
:follow #'org-roam-link-follow-link)
(defun org-roam-link-follow-link (_path)
"Navigates to location in Org-roam link.
This function is called by Org when following links of the type
`roam'. While the path is passed, assume that the cursor is on
the link."
(pcase-let ((`(,link-type ,loc ,desc ,mkr) (org-roam-link--get-location)))
(when (and org-roam-link-auto-replace loc desc)
(org-roam-link--replace-link link-type loc desc))
(pcase link-type
("file"
(if loc
(org-roam--find-file loc)
(org-roam-find-file desc nil nil t)))
("id"
(org-goto-marker-or-bmk mkr)))))
;;; Retrieval Functions
(defun org-roam-link--get-titles ()
"Return all titles within Org-roam."
(mapcar #'car (org-roam-db-query [:select [titles:title] :from titles])))
(defun org-roam-link--get-headlines (&optional file with-marker use-stack)
"Return all outline headings for the current buffer.
If FILE, return outline headings for passed FILE instead.
If WITH-MARKER, return a cons cell of (headline . marker).
If USE-STACK, include the parent paths as well."
(org-roam-with-file file (when with-marker 'keep)
(let* ((outline-level-fn outline-level)
(path-separator "/")
(stack-level 0)
stack cands name level marker)
(save-excursion
(goto-char (point-min))
(while (re-search-forward org-complex-heading-regexp nil t)
(save-excursion
(setq name (substring-no-properties (or (match-string 4) "")))
(setq marker (point-marker))
(when use-stack
(goto-char (match-beginning 0))
(setq level (funcall outline-level-fn))
;; Update stack. The empty entry guards against incorrect
;; headline hierarchies, e.g. a level 3 headline
;; immediately following a level 1 entry.
(while (<= level stack-level)
(pop stack)
(cl-decf stack-level))
(while (> level stack-level)
(push name stack)
(cl-incf stack-level))
(setq name (mapconcat #'identity
(reverse stack)
path-separator)))
(push (if with-marker
(cons name marker)
name) cands))))
(nreverse cands))))
(defun org-roam-link--get-file-from-title (title &optional no-interactive)
"Return the file path corresponding to TITLE.
When NO-INTERACTIVE, return nil if there are multiple options."
(let ((files (mapcar #'car (org-roam-db-query [:select [titles:file] :from titles
:where (= titles:title $v1)]
(vector title)))))
(pcase files
('nil nil)
(`(,file) file)
(_
(unless no-interactive
(completing-read "Select file: " files))))))
(defun org-roam-link--get-id-from-headline (headline &optional file)
"Return (marker . id) correspondng to HEADLINE in FILE.
If FILE is nil, get ID from current buffer.
If there is no corresponding headline, return nil."
(save-excursion
(org-roam-with-file file 'keep
(let ((headlines (org-roam-link--get-headlines file 'with-markers)))
(when-let ((marker (cdr (assoc-string headline headlines))))
(goto-char marker)
(cons marker
(when org-roam-link-auto-replace
(org-id-get-create))))))))
;;; Path-related functions
(defun org-roam-link-get-path (path &optional type)
"Return the PATH of the link to use.
If TYPE is non-nil, create a link of TYPE. Otherwise, respect
`org-link-file-path-type'."
(pcase (or type org-roam-link-file-path-type)
('absolute
(abbreviate-file-name (expand-file-name path)))
('noabbrev
(expand-file-name path))
('relative
(file-relative-name path))))
(defun org-roam-link--split-path (path)
"Splits PATH into title and headline.
Return a list of the form (type title has-headline-p headline star-idx).
type is one of `title', `headline', `title+headline'.
title is the title component of the path.
headline is the headline component of the path.
star-idx is the index of the asterisk, if any."
(save-match-data
(let* ((star-index (string-match-p "\\*" path))
(title (substring-no-properties path 0 star-index))
(headline (if star-index
(substring-no-properties path (+ 1 star-index))
""))
(type (cond ((not star-index)
'title)
((= 0 star-index)
'headline)
(t 'title+headline))))
(list type title headline star-index))))
(defun org-roam-link--get-location ()
"Return the location of the Org-roam fuzzy link at point.
The location is returned as a list containing (link-type loc desc marker).
nil is returned if there is no matching location.
link-type is either \"file\" or \"id\".
loc is the target location: e.g. a file path, or an id.
marker is a marker to the headline, if applicable.
desc is either the the description of the link under point, or
the target of LINK (title or heading content)."
(let ((context (org-element-context))
mkr link-type desc loc)
(pcase (org-element-lineage context '(link) t)
(`nil (error "Not at an Org link"))
(link
(if (not (string-equal "roam" (org-element-property :type link)))
(error "Not at Org-roam link")
(setq desc (and (org-element-property :contents-begin link)
(org-element-property :contents-end link)
(buffer-substring-no-properties
(org-element-property :contents-begin link)
(org-element-property :contents-end link))))
(pcase-let ((`(,type ,title ,headline _) (org-roam-link--split-path
(org-element-property :path link))))
(pcase type
('title+headline
(let ((file (org-roam-link--get-file-from-title title)))
(if (not file)
(org-roam-message "Cannot find matching file")
(setq mkr (org-roam-link--get-id-from-headline headline file))
(pcase mkr
(`(,marker . ,target-id)
(progn
(setq mkr marker
loc target-id
desc (or desc headline)
link-type "id")))
(_ (org-roam-message "Cannot find matching id"))))))
('title
(setq loc (org-roam-link--get-file-from-title title)
link-type "file"
desc (or desc title)))
('headline
(setq mkr (org-roam-link--get-id-from-headline headline))
(pcase mkr
(`(,marker . ,target-id)
(setq mkr marker
loc target-id
link-type "id"
desc (or desc headline)))
(_ (org-roam-message "Cannot find matching headline")))))))))
(list link-type loc desc mkr)))
;;; Conversion Functions
(defun org-roam-link--replace-link (link-type loc &optional desc)
"Replace link at point with a vanilla Org link.
LINK-TYPE is the Org link type, typically \"file\" or \"id\".
LOC is path for the Org link.
DESC is the link description."
(save-excursion
(save-match-data
(unless (org-in-regexp org-link-bracket-re 1)
(user-error "No link at point"))
(replace-match "")
(insert (org-roam-format-link loc desc link-type)))))
(defun org-roam-link-replace-all ()
"Replace all roam links in the current buffer."
(interactive)
(save-excursion
(goto-char (point-min))
(while (re-search-forward org-link-bracket-re nil t)
(condition-case nil
(pcase-let ((`(,link-type ,loc ,desc _) (org-roam-link--get-location)))
(when (and link-type loc)
(org-roam-link--replace-link link-type loc desc)))
(error nil)))))
(defun org-roam-link--replace-link-on-save ()
"Hook to replace all roam links on save."
(when org-roam-link-auto-replace
(org-roam-link-replace-all)))
;;; Completion
(defun org-roam-link-complete-at-point ()
"Do appropriate completion for the link at point."
(let ((end (point))
(start (point))
collection link-type headline-only-p)
(when (org-in-regexp org-link-bracket-re 1)
(setq start (match-beginning 1)
end (match-end 1))
(let ((context (org-element-context)))
(pcase (org-element-lineage context '(link) t)
(`nil nil)
(link
(setq link-type (org-element-property :type link))
(when (member link-type '("roam" "fuzzy"))
(when (string= link-type "roam") (setq start (+ start (length "roam:"))))
(pcase-let ((`(,type ,title _ ,star-idx)
(org-roam-link--split-path (org-element-property :path link))))
(pcase type
('title+headline
(when-let ((file (org-roam-link--get-file-from-title title t)))
(setq collection (apply-partially #'org-roam-link--get-headlines file))
(setq start (+ start star-idx 1))))
('title
(setq collection #'org-roam-link--get-titles))
('headline
(setq collection #'org-roam-link--get-headlines)
(setq start (+ start star-idx 1))
(setq headline-only-p t)))))))))
(when collection
(let ((prefix (buffer-substring-no-properties start end)))
(list start end
(if (functionp collection)
(completion-table-case-fold
(completion-table-dynamic
(lambda (_)
(cl-remove-if (apply-partially #'string= prefix)
(funcall collection))))
(not org-roam-completion-ignore-case))
collection)
:exit-function
(lambda (str &rest _)
(delete-char (- 0 (length str)
(if headline-only-p 1 0)))
(insert (concat (unless (string= link-type "roam") "roam:")
(when headline-only-p "*")
(org-link-escape str)))))))))
(provide 'org-roam-link)
;;; org-roam-link.el ends here