mirror of
https://git.savannah.gnu.org/git/emacs/org-mode.git
synced 2024-11-27 07:37:25 +00:00
9dac00129d
* lisp/ox-latex.el (org-latex-link): * lisp/ox-html.el (org-html-link): Do not expand absolute file names and do not try to fix hierarchy part, as it is already taken care of at the parser level. * lisp/ox-md.el (org-md-link): Ditto. Also fix absolute file names. * lisp/ox-odt.el (org-odt-link): * lisp/ox-man.el (org-man-link): * lisp/ox-texinfo.el (org-texinfo-link): * contrib/lisp/ox-groff.el (org-groff-link): Ditto. Do not prepend scheme part to relative file names either. * contrib/lisp/ox-deck.el (org-deck-link): Small refactoring.
493 lines
16 KiB
EmacsLisp
493 lines
16 KiB
EmacsLisp
;;; 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)
|
||
|
||
|
||
|
||
;;; 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)))
|
||
|
||
|
||
|
||
;;; 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)
|
||
(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)
|
||
(line-break . org-md-line-break)
|
||
(link . org-md-link)
|
||
(paragraph . org-md-paragraph)
|
||
(plain-list . org-md-plain-list)
|
||
(plain-text . org-md-plain-text)
|
||
(quote-block . org-md-quote-block)
|
||
(quote-section . org-md-example-block)
|
||
(section . org-md-section)
|
||
(src-block . org-md-example-block)
|
||
(template . org-md-template)
|
||
(verbatim . org-md-verbatim)))
|
||
|
||
|
||
|
||
;;; 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)
|
||
|
||
|
||
|
||
;;; 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 and Src 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-export-format-code-default example-block 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))))))
|
||
|
||
|
||
;;;; 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 ""
|
||
(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") contents)
|
||
((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))
|
||
((string= 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:" path))))
|
||
(t raw-path))))
|
||
(if (not contents) (format "<%s>" path)
|
||
(format "[%s](%s)" contents path)))))))
|
||
|
||
|
||
;;;; 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)
|
||
|
||
|
||
;;;; 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)
|
||
|
||
|
||
|
||
;;; 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)))
|
||
|
||
|
||
(provide 'ox-md)
|
||
|
||
;; Local variables:
|
||
;; generated-autoload-file: "org-loaddefs.el"
|
||
;; End:
|
||
|
||
;;; ox-md.el ends here
|