emacs-orgmode@gnu.org archives
 help / color / mirror / code / Atom feed
blob b8316dd71b79d9f3fafca9bf521f6bc2fe0999bd 18397 bytes (raw)
name: lisp/ox-md.el 	 # note: path name is non-authoritative(*)

  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
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
 
;;; ox-md.el --- Markdown Back-End for Org Export Engine

;; Copyright (C) 2012-2014 Free Software Foundation, Inc.

;; Author: Nicolas Goaziou <n.goaziou@gmail.com>
;; Keywords: org, wp, markdown

;; This file is part of GNU Emacs.

;; GNU Emacs 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.

;; GNU Emacs 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.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;; This library implements a Markdown back-end (vanilla flavor) for
;; Org exporter, based on `html' back-end.  See Org manual for more
;; information.

;;; Code:

(eval-when-compile (require 'cl))
(require 'ox-html)
(require 'ox-publish)

\f
;;; User-Configurable Variables

(defgroup org-export-md nil
  "Options specific to Markdown export back-end."
  :tag "Org Markdown"
  :group 'org-export
  :version "24.4"
  :package-version '(Org . "8.0"))

(defcustom org-md-headline-style 'atx
  "Style used to format headlines.
This variable can be set to either `atx' or `setext'."
  :group 'org-export-md
  :type '(choice
	  (const :tag "Use \"atx\" style" atx)
	  (const :tag "Use \"Setext\" style" setext)))


\f
;;; Define Back-End

(org-export-define-derived-backend 'md 'html
  :export-block '("MD" "MARKDOWN")
  :filters-alist '((:filter-parse-tree . org-md-separate-elements))
  :menu-entry
  '(?m "Export to Markdown"
       ((?M "To temporary buffer"
	    (lambda (a s v b) (org-md-export-as-markdown a s v)))
	(?m "To file" (lambda (a s v b) (org-md-export-to-markdown a s v)))
	(?o "To file and open"
	    (lambda (a s v b)
	      (if a (org-md-export-to-markdown t s v)
		(org-open-file (org-md-export-to-markdown nil s v)))))))
  :translate-alist '((bold . org-md-bold)
		     (code . org-md-verbatim)
		     (comment . (lambda (&rest args) ""))
		     (comment-block . (lambda (&rest args) ""))
		     (example-block . org-md-example-block)
		     (export-block . org-md-export-block)
		     (fixed-width . org-md-example-block)
		     (footnote-definition . ignore)
		     (footnote-reference . ignore)
		     (headline . org-md-headline)
		     (horizontal-rule . org-md-horizontal-rule)
		     (inline-src-block . org-md-verbatim)
		     (inner-template . org-md-inner-template)
		     (italic . org-md-italic)
		     (item . org-md-item)
		     (keyword . org-md-keyword)
		     (line-break . org-md-line-break)
		     (link . org-md-link)
		     (node-property . org-md-node-property)
		     (paragraph . org-md-paragraph)
		     (plain-list . org-md-plain-list)
		     (plain-text . org-md-plain-text)
		     (property-drawer . org-md-property-drawer)
		     (quote-block . org-md-quote-block)
		     (section . org-md-section)
		     (src-block . org-md-example-block)
		     (template . org-md-template)
		     (verbatim . org-md-verbatim)))

\f
;;; Filters

(defun org-md-separate-elements (tree backend info)
  "Fix blank lines between elements.

TREE is the parse tree being exported.  BACKEND is the export
back-end used.  INFO is a plist used as a communication channel.

Make sure there's no blank line before a plain list, unless it is
located right after a paragraph.  Otherwise, add a blank line
between elements.  Blank lines between items are preserved.

Assume BACKEND is `md'."
  (org-element-map tree (remq 'item org-element-all-elements)
    (lambda (elem)
      (org-element-put-property
       elem :post-blank
       (if (and (eq (org-element-type (org-export-get-next-element elem info))
		    'plain-list)
		(not (and (eq (org-element-type elem) 'paragraph)
			  (org-export-get-previous-element elem info))))
	   0
	 1))))
  ;; Return updated tree.
  tree)


\f
;;; Transcode Functions

;;;; Bold

(defun org-md-bold (bold contents info)
  "Transcode BOLD object into Markdown format.
CONTENTS is the text within bold markup.  INFO is a plist used as
a communication channel."
  (format "**%s**" contents))


;;;; Code and Verbatim

(defun org-md-verbatim (verbatim contents info)
  "Transcode VERBATIM object into Markdown format.
CONTENTS is nil.  INFO is a plist used as a communication
channel."
  (let ((value (org-element-property :value verbatim)))
    (format (cond ((not (string-match "`" value)) "`%s`")
		  ((or (string-match "\\``" value)
		       (string-match "`\\'" value))
		   "`` %s ``")
		  (t "``%s``"))
	    value)))


;;;; Example Block, Src Block and export Block

(defun org-md-example-block (example-block contents info)
  "Transcode EXAMPLE-BLOCK element into Markdown format.
CONTENTS is nil.  INFO is a plist used as a communication
channel."
  (replace-regexp-in-string
   "^" "    "
   (org-remove-indentation
    (org-element-property :value example-block))))

(defun org-md-export-block (export-block contents info)
  "Transcode a EXPORT-BLOCK element from Org to Markdown.
CONTENTS is nil.  INFO is a plist holding contextual information."
  (if (member (org-element-property :type export-block) '("MARKDOWN" "MD"))
      (org-remove-indentation (org-element-property :value export-block))
    ;; Also include HTML export blocks.
    (org-export-with-backend 'html export-block contents info)))


;;;; Headline

(defun org-md-headline (headline contents info)
  "Transcode HEADLINE element into Markdown format.
CONTENTS is the headline contents.  INFO is a plist used as
a communication channel."
  (unless (org-element-property :footnote-section-p headline)
    (let* ((level (org-export-get-relative-level headline info))
	   (title (org-export-data (org-element-property :title headline) info))
	   (todo (and (plist-get info :with-todo-keywords)
		      (let ((todo (org-element-property :todo-keyword
							headline)))
			(and todo (concat (org-export-data todo info) " ")))))
	   (tags (and (plist-get info :with-tags)
		      (let ((tag-list (org-export-get-tags headline info)))
			(and tag-list
			     (format "     :%s:"
				     (mapconcat 'identity tag-list ":"))))))
	   (priority
	    (and (plist-get info :with-priority)
		 (let ((char (org-element-property :priority headline)))
		   (and char (format "[#%c] " char)))))
	   ;; Headline text without tags.
	   (heading (concat todo priority title)))
      (cond
       ;; Cannot create a headline.  Fall-back to a list.
       ((or (org-export-low-level-p headline info)
	    (not (memq org-md-headline-style '(atx setext)))
	    (and (eq org-md-headline-style 'atx) (> level 6))
	    (and (eq org-md-headline-style 'setext) (> level 2)))
	(let ((bullet
	       (if (not (org-export-numbered-headline-p headline info)) "-"
		 (concat (number-to-string
			  (car (last (org-export-get-headline-number
				      headline info))))
			 "."))))
	  (concat bullet (make-string (- 4 (length bullet)) ? ) heading tags
		  "\n\n"
		  (and contents
		       (replace-regexp-in-string "^" "    " contents)))))
       ;; Use "Setext" style.
       ((eq org-md-headline-style 'setext)
	(concat heading tags "\n"
		(make-string (length heading) (if (= level 1) ?= ?-))
		"\n\n"
		contents))
       ;; Use "atx" style.
       (t (concat (make-string level ?#) " " heading tags "\n\n" contents))))))


;;;; Horizontal Rule

(defun org-md-horizontal-rule (horizontal-rule contents info)
  "Transcode HORIZONTAL-RULE element into Markdown format.
CONTENTS is the horizontal rule contents.  INFO is a plist used
as a communication channel."
  "---")


;;;; Italic

(defun org-md-italic (italic contents info)
  "Transcode ITALIC object into Markdown format.
CONTENTS is the text within italic markup.  INFO is a plist used
as a communication channel."
  (format "*%s*" contents))


;;;; Item

(defun org-md-item (item contents info)
  "Transcode ITEM element into Markdown format.
CONTENTS is the item contents.  INFO is a plist used as
a communication channel."
  (let* ((type (org-element-property :type (org-export-get-parent item)))
	 (struct (org-element-property :structure item))
	 (bullet (if (not (eq type 'ordered)) "-"
		   (concat (number-to-string
			    (car (last (org-list-get-item-number
					(org-element-property :begin item)
					struct
					(org-list-prevs-alist struct)
					(org-list-parents-alist struct)))))
			   "."))))
    (concat bullet
	    (make-string (- 4 (length bullet)) ? )
	    (case (org-element-property :checkbox item)
	      (on "[X] ")
	      (trans "[-] ")
	      (off "[ ] "))
	    (let ((tag (org-element-property :tag item)))
	      (and tag (format "**%s:** "(org-export-data tag info))))
	    (and contents
		 (org-trim (replace-regexp-in-string "^" "    " contents))))))



;;;; Keyword

(defun org-md-keyword (keyword contents info)
  "Transcode a KEYWORD element into Markdown format.
CONTENTS is nil.  INFO is a plist used as a communication
channel."
  (if (member (org-element-property :key keyword) '("MARKDOWN" "MD"))
      (org-element-property :value keyword)
    (org-export-with-backend 'html keyword contents info)))


;;;; Line Break

(defun org-md-line-break (line-break contents info)
  "Transcode LINE-BREAK object into Markdown format.
CONTENTS is nil.  INFO is a plist used as a communication
channel."
  "  \n")


;;;; Link

(defun org-md-link (link contents info)
  "Transcode LINE-BREAK object into Markdown format.
CONTENTS is the link's description.  INFO is a plist used as
a communication channel."
  (let ((link-org-files-as-md
	 (function
	  (lambda (raw-path)
	    ;; Treat links to `file.org' as links to `file.md'.
	    (if (string= ".org" (downcase (file-name-extension raw-path ".")))
		(concat (file-name-sans-extension raw-path) ".md")
	      raw-path))))
	(type (org-element-property :type link)))
    (cond ((member type '("custom-id" "id"))
	   (let ((destination (org-export-resolve-id-link link info)))
	     (if (stringp destination)	; External file.
		 (let ((path (funcall link-org-files-as-md destination)))
		   (if (not contents) (format "<%s>" path)
		     (format "[%s](%s)" contents path)))
	       (concat
		(and contents (concat contents " "))
		(format "(%s)"
			(format (org-export-translate "See section %s" :html info)
				(mapconcat 'number-to-string
					   (org-export-get-headline-number
					    destination info)
					   ".")))))))
	  ((org-export-inline-image-p link org-html-inline-image-rules)
	   (let ((path (let ((raw-path (org-element-property :path link)))
			 (if (not (file-name-absolute-p raw-path)) raw-path
			   (expand-file-name raw-path))))
		 (caption (org-export-data
			   (org-export-get-caption
			    (org-export-get-parent-element link)) info)))
	     (format "![img](%s)"
		     (if (not (org-string-nw-p caption)) path
		       (format "%s \"%s\"" path caption)))))
	  ((string= type "coderef")
	   (let ((ref (org-element-property :path link)))
	     (format (org-export-get-coderef-format ref contents)
		     (org-export-resolve-coderef ref info))))
	  ((equal type "radio")
	   (let ((destination (org-export-resolve-radio-link link info)))
	     (org-export-data (org-element-contents destination) info)))
	  ((equal type "fuzzy")
	   (let ((destination (org-export-resolve-fuzzy-link link info)))
	     (if (org-string-nw-p contents) contents
	       (when destination
		 (let ((number (org-export-get-ordinal destination info)))
		   (when number
		     (if (atom number) (number-to-string number)
		       (mapconcat 'number-to-string number "."))))))))
	  (t (let* ((raw-path (org-element-property :path link))
		    (path
		     (cond
		      ((member type '("http" "https" "ftp"))
		       (concat type ":" raw-path))
		      ((equal type "file")
		       (let ((path (funcall link-org-files-as-md raw-path)))
			 (if (not (file-name-absolute-p path)) path
			   ;; If file path is absolute, prepend it
			   ;; with "file://" component.
			   (concat "file://" (expand-file-name raw-path)))))
		      (t raw-path))))
	       (if (not contents) (format "<%s>" path)
		 (format "[%s](%s)" contents path)))))))


;;;; Node Property

(defun org-md-node-property (node-property contents info)
  "Transcode a NODE-PROPERTY element into Markdown syntax.
CONTENTS is nil.  INFO is a plist holding contextual
information."
  (format "%s:%s"
          (org-element-property :key node-property)
          (let ((value (org-element-property :value node-property)))
            (if value (concat " " value) ""))))


;;;; Paragraph

(defun org-md-paragraph (paragraph contents info)
  "Transcode PARAGRAPH element into Markdown format.
CONTENTS is the paragraph contents.  INFO is a plist used as
a communication channel."
  (let ((first-object (car (org-element-contents paragraph))))
    ;; If paragraph starts with a #, protect it.
    (if (and (stringp first-object) (string-match "\\`#" first-object))
	(replace-regexp-in-string "\\`#" "\\#" contents nil t)
      contents)))


;;;; Plain List

(defun org-md-plain-list (plain-list contents info)
  "Transcode PLAIN-LIST element into Markdown format.
CONTENTS is the plain-list contents.  INFO is a plist used as
a communication channel."
  contents)


;;;; Plain Text

(defun org-md-plain-text (text info)
  "Transcode a TEXT string into Markdown format.
TEXT is the string to transcode.  INFO is a plist holding
contextual information."
  (when (plist-get info :with-smart-quotes)
    (setq text (org-export-activate-smart-quotes text :html info)))
  ;; Protect ambiguous #.  This will protect # at the beginning of
  ;; a line, but not at the beginning of a paragraph.  See
  ;; `org-md-paragraph'.
  (setq text (replace-regexp-in-string "\n#" "\n\\\\#" text))
  ;; Protect ambiguous !
  (setq text (replace-regexp-in-string "\\(!\\)\\[" "\\\\!" text nil nil 1))
  ;; Protect `, *, _ and \
  (setq text (replace-regexp-in-string "[`*_\\]" "\\\\\\&" text))
  ;; Handle special strings, if required.
  (when (plist-get info :with-special-strings)
    (setq text (org-html-convert-special-strings text)))
  ;; Handle break preservation, if required.
  (when (plist-get info :preserve-breaks)
    (setq text (replace-regexp-in-string "[ \t]*\n" "  \n" text)))
  ;; Return value.
  text)


;;;; Property Drawer

(defun org-md-property-drawer (property-drawer contents info)
  "Transcode a PROPERTY-DRAWER element into Markdown format.
CONTENTS holds the contents of the drawer.  INFO is a plist
holding contextual information."
  (and (org-string-nw-p contents)
       (replace-regexp-in-string "^" "    " contents)))


;;;; Quote Block

(defun org-md-quote-block (quote-block contents info)
  "Transcode QUOTE-BLOCK element into Markdown format.
CONTENTS is the quote-block contents.  INFO is a plist used as
a communication channel."
  (replace-regexp-in-string
   "^" "> "
   (replace-regexp-in-string "\n\\'" "" contents)))


;;;; Section

(defun org-md-section (section contents info)
  "Transcode SECTION element into Markdown format.
CONTENTS is the section contents.  INFO is a plist used as
a communication channel."
  contents)


;;;; Template

(defun org-md-inner-template (contents info)
  "Return body of document after converting it to Markdown syntax.
CONTENTS is the transcoded contents string.  INFO is a plist
holding export options."
  ;; Make sure CONTENTS is separated from table of contents and
  ;; footnotes with at least a blank line.
  (org-trim (org-html-inner-template (concat "\n" contents "\n") info)))

(defun org-md-template (contents info)
  "Return complete document string after Markdown conversion.
CONTENTS is the transcoded contents string.  INFO is a plist used
as a communication channel."
  contents)


\f
;;; Interactive function

;;;###autoload
(defun org-md-export-as-markdown (&optional async subtreep visible-only)
  "Export current buffer to a Markdown buffer.

If narrowing is active in the current buffer, only export its
narrowed part.

If a region is active, export that region.

A non-nil optional argument ASYNC means the process should happen
asynchronously.  The resulting buffer should be accessible
through the `org-export-stack' interface.

When optional argument SUBTREEP is non-nil, export the sub-tree
at point, extracting information from the headline properties
first.

When optional argument VISIBLE-ONLY is non-nil, don't export
contents of hidden elements.

Export is done in a buffer named \"*Org MD Export*\", which will
be displayed when `org-export-show-temporary-export-buffer' is
non-nil."
  (interactive)
  (org-export-to-buffer 'md "*Org MD Export*"
    async subtreep visible-only nil nil (lambda () (text-mode))))

;;;###autoload
(defun org-md-convert-region-to-md ()
  "Assume the current region has org-mode syntax, and convert it to Markdown.
This can be used in any buffer.  For example, you can write an
itemized list in org-mode syntax in a Markdown buffer and use
this command to convert it."
  (interactive)
  (org-export-replace-region-by 'md))


;;;###autoload
(defun org-md-export-to-markdown (&optional async subtreep visible-only)
  "Export current buffer to a Markdown file.

If narrowing is active in the current buffer, only export its
narrowed part.

If a region is active, export that region.

A non-nil optional argument ASYNC means the process should happen
asynchronously.  The resulting file should be accessible through
the `org-export-stack' interface.

When optional argument SUBTREEP is non-nil, export the sub-tree
at point, extracting information from the headline properties
first.

When optional argument VISIBLE-ONLY is non-nil, don't export
contents of hidden elements.

Return output file's name."
  (interactive)
  (let ((outfile (org-export-output-file-name ".md" subtreep)))
    (org-export-to-file 'md outfile async subtreep visible-only)))

;;;###autoload
(defun org-md-publish-to-md (plist filename pub-dir)
  "Publish an org file to Markdown.

FILENAME is the filename of the Org file to be published.  PLIST
is the property list for the given project.  PUB-DIR is the
publishing directory.

Return output file name."
  (org-publish-org-to 'md filename ".md" plist pub-dir))

(provide 'ox-md)

;; Local variables:
;; generated-autoload-file: "org-loaddefs.el"
;; End:

;;; ox-md.el ends here

debug log:

solving b8316dd ...
found b8316dd in https://git.savannah.gnu.org/cgit/emacs/org-mode.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).