191 lines
6.2 KiB
EmacsLisp
191 lines
6.2 KiB
EmacsLisp
;;; ox-gfm.el --- Github Flavored Markdown Back-End for Org Export Engine
|
||
|
||
;; Copyright (C) 2014 Lars Tveito
|
||
|
||
;; Author: Lars Tveito
|
||
;; Keywords: org, wp, markdown, github
|
||
;; Package-Version: 20141211.240
|
||
|
||
;; This file is not 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 (github flavor) for Org
|
||
;; exporter, based on the `md' back-end.
|
||
|
||
;;; Code:
|
||
|
||
(require 'ox-md)
|
||
|
||
|
||
|
||
;;; User-Configurable Variables
|
||
|
||
(defgroup org-export-gfm nil
|
||
"Options specific to Markdown export back-end."
|
||
:tag "Org Github Flavored Markdown"
|
||
:group 'org-export
|
||
:version "24.4"
|
||
:package-version '(Org . "8.0"))
|
||
|
||
|
||
;;; Define Back-End
|
||
|
||
(org-export-define-derived-backend 'gfm 'md
|
||
:export-block '("GFM" "GITHUB FLAVORED MARKDOWN")
|
||
:filters-alist '((:filter-parse-tree . org-md-separate-elements))
|
||
:menu-entry
|
||
'(?g "Export to Github Flavored Markdown"
|
||
((?G "To temporary buffer"
|
||
(lambda (a s v b) (org-gfm-export-as-markdown a s v)))
|
||
(?g "To file" (lambda (a s v b) (org-gfm-export-to-markdown a s v)))
|
||
(?o "To file and open"
|
||
(lambda (a s v b)
|
||
(if a (org-gfm-export-to-markdown t s v)
|
||
(org-open-file (org-gfm-export-to-markdown nil s v)))))))
|
||
:translate-alist '((inner-template . org-gfm-inner-template)
|
||
(strike-through . org-gfm-strike-through)
|
||
(src-block . org-gfm-src-block)))
|
||
|
||
|
||
|
||
;;; Transcode Functions
|
||
|
||
;;;; Src Block
|
||
|
||
(defun org-gfm-src-block (src-block contents info)
|
||
"Transcode SRC-BLOCK element into Github Flavored Markdown
|
||
format. CONTENTS is nil. INFO is a plist used as a communication
|
||
channel."
|
||
(let* ((lang (org-element-property :language src-block))
|
||
(code (org-export-format-code-default src-block info))
|
||
(prefix (concat "```" lang "\n"))
|
||
(suffix "```"))
|
||
(concat prefix code suffix)))
|
||
|
||
|
||
;;;; Strike-Through
|
||
|
||
(defun org-gfm-strike-through (strike-through contents info)
|
||
"Transcode STRIKE-THROUGH from Org to Markdown (GFM).
|
||
CONTENTS is the text with strike-through markup. INFO is a plist
|
||
holding contextual information."
|
||
(format "~~%s~~" contents))
|
||
|
||
;;;; Table of contents
|
||
|
||
(defun org-gfm-format-toc (headline)
|
||
"Return an appropriate table of contents entry for HEADLINE. INFO is a
|
||
plist used as a communication channel."
|
||
(let* ((title (org-export-data
|
||
(org-export-get-alt-title headline info) info))
|
||
(level (1- (org-element-property :level headline)))
|
||
(indent (concat (make-string (* level 2) ? )))
|
||
(anchor (or (org-element-property :custom_id headline)
|
||
(concat "sec-" (mapconcat 'number-to-string
|
||
(org-export-get-headline-number
|
||
headline info) "-")))))
|
||
(concat indent "- [" title "]" "(#" anchor ")")))
|
||
|
||
|
||
|
||
|
||
;;;; Template
|
||
|
||
(defun org-gfm-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."
|
||
(let* ((depth (plist-get info :with-toc))
|
||
(headlines (and depth (org-export-collect-headlines info depth)))
|
||
(toc-string (or (mapconcat 'org-gfm-format-toc headlines "\n") ""))
|
||
(toc-tail (if headlines "\n\n" "")))
|
||
(concat toc-string toc-tail contents)))
|
||
|
||
|
||
|
||
;;; Interactive function
|
||
|
||
;;;###autoload
|
||
(defun org-gfm-export-as-markdown (&optional async subtreep visible-only)
|
||
"Export current buffer to a Github Flavored 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 GFM Export*\", which will
|
||
be displayed when `org-export-show-temporary-export-buffer' is
|
||
non-nil."
|
||
(interactive)
|
||
(org-export-to-buffer 'gfm "*Org GFM Export*"
|
||
async subtreep visible-only nil nil (lambda () (text-mode))))
|
||
|
||
|
||
;;;###autoload
|
||
(defun org-gfm-convert-region-to-md ()
|
||
"Assume the current region has org-mode syntax, and convert it
|
||
to Github Flavored 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 'gfm))
|
||
|
||
|
||
;;;###autoload
|
||
(defun org-gfm-export-to-markdown (&optional async subtreep visible-only)
|
||
"Export current buffer to a Github Flavored 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 'gfm outfile async subtreep visible-only)))
|
||
|
||
(provide 'ox-gfm)
|
||
|
||
;; Local variables:
|
||
;; generated-autoload-file: "org-loaddefs.el"
|
||
;; End:
|
||
|
||
;;; ox-gfm.el ends here
|