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386 lines
15 KiB
EmacsLisp
386 lines
15 KiB
EmacsLisp
;;; org-exp-blocks.el --- pre-process blocks when exporting org files
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;; Copyright (C) 2009-2012 Free Software Foundation, Inc.
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;; Author: Eric Schulte
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;; This file is part of GNU Emacs.
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;;
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;
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;; This is a utility for pre-processing blocks in org files before
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;; export using the `org-export-preprocess-hook'. It can be used for
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;; exporting new types of blocks from org-mode files and also for
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;; changing the default export behavior of existing org-mode blocks.
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;; The `org-export-blocks' and `org-export-interblocks' variables can
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;; be used to control how blocks and the spaces between blocks
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;; respectively are processed upon export.
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;;
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;; The type of a block is defined as the string following =#+begin_=,
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;; so for example the following block would be of type ditaa. Note
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;; that both upper or lower case are allowed in =#+BEGIN_= and
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;; =#+END_=.
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;;
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;; #+begin_ditaa blue.png -r -S
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;; +---------+
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;; | cBLU |
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;; | |
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;; | +----+
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;; | |cPNK|
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;; | | |
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;; +----+----+
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;; #+end_ditaa
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;;
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;;; Currently Implemented Block Types
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;;
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;; ditaa :: (DEPRECATED--use "#+begin_src ditaa" code blocks) Convert
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;; ascii pictures to actual images using ditaa
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;; http://ditaa.sourceforge.net/. To use this set
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;; `org-ditaa-jar-path' to the path to ditaa.jar on your
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;; system (should be set automatically in most cases) .
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;;
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;; dot :: (DEPRECATED--use "#+begin_src dot" code blocks) Convert
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;; graphs defined using the dot graphing language to images
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;; using the dot utility. For information on dot see
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;; http://www.graphviz.org/
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;;
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;; export-comment :: Wrap comments with titles and author information,
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;; in their own divs with author-specific ids allowing for
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;; css coloring of comments based on the author.
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;;
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;;; Adding new blocks
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;;
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;; When adding a new block type first define a formatting function
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;; along the same lines as `org-export-blocks-format-dot' and then use
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;; `org-export-blocks-add-block' to add your block type to
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;; `org-export-blocks'.
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;;; Code:
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(eval-when-compile
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(require 'cl))
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(require 'org)
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(require 'find-func)
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(defun org-export-blocks-set (var value)
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"Set the value of `org-export-blocks' and install fontification."
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(set var value)
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(mapc (lambda (spec)
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(if (nth 2 spec)
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(setq org-protecting-blocks
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(delete (symbol-name (car spec))
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org-protecting-blocks))
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(add-to-list 'org-protecting-blocks
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(symbol-name (car spec)))))
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value))
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(defcustom org-export-blocks
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'((export-comment org-export-blocks-format-comment t)
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(ditaa org-export-blocks-format-ditaa nil)
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(dot org-export-blocks-format-dot nil))
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"Use this alist to associate block types with block exporting functions.
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The type of a block is determined by the text immediately
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following the '#+BEGIN_' portion of the block header. Each block
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export function should accept three arguments."
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:group 'org-export-general
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:type '(repeat
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(list
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(symbol :tag "Block name")
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(function :tag "Block formatter")
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(boolean :tag "Fontify content as Org syntax")))
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:set 'org-export-blocks-set)
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(defun org-export-blocks-add-block (block-spec)
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"Add a new block type to `org-export-blocks'.
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BLOCK-SPEC should be a three element list the first element of
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which should indicate the name of the block, the second element
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should be the formatting function called by
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`org-export-blocks-preprocess' and the third element a flag
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indicating whether these types of blocks should be fontified in
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org-mode buffers (see `org-protecting-blocks'). For example the
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BLOCK-SPEC for ditaa blocks is as follows.
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(ditaa org-export-blocks-format-ditaa nil)"
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(unless (member block-spec org-export-blocks)
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(setq org-export-blocks (cons block-spec org-export-blocks))
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(org-export-blocks-set 'org-export-blocks org-export-blocks)))
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(defcustom org-export-interblocks
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'()
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"Use this a-list to associate block types with block exporting functions.
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The type of a block is determined by the text immediately
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following the '#+BEGIN_' portion of the block header. Each block
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export function should accept three arguments."
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:group 'org-export-general
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:type 'alist)
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(defcustom org-export-blocks-witheld
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'(hidden)
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"List of block types (see `org-export-blocks') which should not be exported."
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:group 'org-export-general
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:type 'list)
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(defcustom org-export-blocks-postblock-hook nil
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"Run after blocks have been processed with `org-export-blocks-preprocess'."
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:group 'org-export-general
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:type 'hook)
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(defun org-export-blocks-html-quote (body &optional open close)
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"Protect BODY from org html export.
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The optional OPEN and CLOSE tags will be inserted around BODY."
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(concat
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"\n#+BEGIN_HTML\n"
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(or open "")
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body (if (string-match "\n$" body) "" "\n")
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(or close "")
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"#+END_HTML\n"))
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(defun org-export-blocks-latex-quote (body &optional open close)
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"Protect BODY from org latex export.
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The optional OPEN and CLOSE tags will be inserted around BODY."
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(concat
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"\n#+BEGIN_LaTeX\n"
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(or open "")
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body (if (string-match "\n$" body) "" "\n")
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(or close "")
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"#+END_LaTeX\n"))
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(defun org-export-blocks-preprocess ()
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"Export all blocks according to the `org-export-blocks' block export alist.
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Does not export block types specified in specified in BLOCKS
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which defaults to the value of `org-export-blocks-witheld'."
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(interactive)
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(save-window-excursion
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(let ((case-fold-search t)
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(types '())
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matched indentation type func
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start end body headers preserve-indent progress-marker)
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(flet ((interblock (start end)
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(mapcar (lambda (pair) (funcall (second pair) start end))
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org-export-interblocks)))
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(goto-char (point-min))
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(setq start (point))
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(let ((beg-re "^\\([ \t]*\\)#\\+begin_\\(\\S-+\\)[ \t]*\\(.*\\)?[\r\n]"))
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(while (re-search-forward beg-re nil t)
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(let* ((match-start (copy-marker (match-beginning 0)))
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(body-start (copy-marker (match-end 0)))
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(indentation (length (match-string 1)))
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(inner-re (format "^[ \t]*#\\+\\(begin\\|end\\)_%s"
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(regexp-quote (downcase (match-string 2)))))
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(type (intern (downcase (match-string 2))))
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(headers (save-match-data
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(org-split-string (match-string 3) "[ \t]+")))
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(balanced 1)
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(preserve-indent (or org-src-preserve-indentation
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(member "-i" headers)))
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match-end)
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(while (and (not (zerop balanced))
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(re-search-forward inner-re nil t))
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(if (string= (downcase (match-string 1)) "end")
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(decf balanced)
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(incf balanced)))
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(when (not (zerop balanced))
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(error "unbalanced begin/end_%s blocks with %S"
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type (buffer-substring match-start (point))))
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(setq match-end (copy-marker (match-end 0)))
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(unless preserve-indent
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(setq body (save-match-data (org-remove-indentation
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(buffer-substring
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body-start (match-beginning 0))))))
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(unless (memq type types) (setq types (cons type types)))
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(save-match-data (interblock start match-start))
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(when (setq func (cadr (assoc type org-export-blocks)))
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(let ((replacement (save-match-data
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(if (memq type org-export-blocks-witheld) ""
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(apply func body headers)))))
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(when replacement
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(delete-region match-start match-end)
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(goto-char match-start) (insert replacement)
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(unless preserve-indent
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(indent-code-rigidly match-start (point) indentation)))))
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;; cleanup markers
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(set-marker match-start nil)
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(set-marker body-start nil)
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(set-marker match-end nil))
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(setq start (point))))
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(interblock start (point-max))
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(run-hooks 'org-export-blocks-postblock-hook)))))
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;;================================================================================
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;; type specific functions
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;;--------------------------------------------------------------------------------
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;; ditaa: create images from ASCII art using the ditaa utility
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(defcustom org-ditaa-jar-path (expand-file-name
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"ditaa.jar"
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(file-name-as-directory
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(expand-file-name
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"scripts"
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(file-name-as-directory
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(expand-file-name
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"../contrib"
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(file-name-directory (find-library-name "org")))))))
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"Path to the ditaa jar executable."
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:group 'org-babel
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:type 'string)
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(defvar org-export-current-backend) ; dynamically bound in org-exp.el
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(defun org-export-blocks-format-ditaa (body &rest headers)
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"DEPRECATED: use begin_src ditaa code blocks
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Pass block BODY to the ditaa utility creating an image.
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Specify the path at which the image should be saved as the first
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element of headers, any additional elements of headers will be
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passed to the ditaa utility as command line arguments."
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(message "begin_ditaa blocks are DEPRECATED, use begin_src blocks")
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(let* ((args (if (cdr headers) (mapconcat 'identity (cdr headers) " ")))
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(data-file (make-temp-file "org-ditaa"))
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(hash (progn
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(set-text-properties 0 (length body) nil body)
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(sha1 (prin1-to-string (list body args)))))
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(raw-out-file (if headers (car headers)))
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(out-file-parts (if (string-match "\\(.+\\)\\.\\([^\\.]+\\)$" raw-out-file)
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(cons (match-string 1 raw-out-file)
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(match-string 2 raw-out-file))
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(cons raw-out-file "png")))
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(out-file (concat (car out-file-parts) "_" hash "." (cdr out-file-parts))))
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(unless (file-exists-p org-ditaa-jar-path)
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(error (format "Could not find ditaa.jar at %s" org-ditaa-jar-path)))
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(setq body (if (string-match "^\\([^:\\|:[^ ]\\)" body)
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body
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(mapconcat (lambda (x) (substring x (if (> (length x) 1) 2 1)))
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(org-split-string body "\n")
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"\n")))
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(prog1
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(cond
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((member org-export-current-backend '(html latex docbook))
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(unless (file-exists-p out-file)
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(mapc ;; remove old hashed versions of this file
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(lambda (file)
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(when (and (string-match (concat (regexp-quote (car out-file-parts))
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"_\\([[:alnum:]]+\\)\\."
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(regexp-quote (cdr out-file-parts)))
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file)
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(= (length (match-string 1 out-file)) 40))
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(delete-file (expand-file-name file
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(file-name-directory out-file)))))
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(directory-files (or (file-name-directory out-file)
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default-directory)))
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(with-temp-file data-file (insert body))
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(message (concat "java -jar " org-ditaa-jar-path " " args " " data-file " " out-file))
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(shell-command (concat "java -jar " org-ditaa-jar-path " " args " " data-file " " out-file)))
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(format "\n[[file:%s]]\n" out-file))
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(t (concat
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"\n#+BEGIN_EXAMPLE\n"
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body (if (string-match "\n$" body) "" "\n")
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"#+END_EXAMPLE\n")))
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(message "begin_ditaa blocks are DEPRECATED, use begin_src blocks"))))
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;;--------------------------------------------------------------------------------
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;; dot: create graphs using the dot graphing language
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;; (require the dot executable to be in your path)
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(defun org-export-blocks-format-dot (body &rest headers)
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"DEPRECATED: use \"#+begin_src dot\" code blocks
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Pass block BODY to the dot graphing utility creating an image.
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Specify the path at which the image should be saved as the first
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element of headers, any additional elements of headers will be
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passed to the dot utility as command line arguments. Don't
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forget to specify the output type for the dot command, so if you
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are exporting to a file with a name like 'image.png' you should
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include a '-Tpng' argument, and your block should look like the
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following.
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#+begin_dot models.png -Tpng
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digraph data_relationships {
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\"data_requirement\" [shape=Mrecord, label=\"{DataRequirement|description\lformat\l}\"]
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\"data_product\" [shape=Mrecord, label=\"{DataProduct|name\lversion\lpoc\lformat\l}\"]
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\"data_requirement\" -> \"data_product\"
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}
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#+end_dot"
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(message "begin_dot blocks are DEPRECATED, use begin_src blocks")
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(let* ((args (if (cdr headers) (mapconcat 'identity (cdr headers) " ")))
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(data-file (make-temp-file "org-ditaa"))
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(hash (progn
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(set-text-properties 0 (length body) nil body)
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(sha1 (prin1-to-string (list body args)))))
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(raw-out-file (if headers (car headers)))
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(out-file-parts (if (string-match "\\(.+\\)\\.\\([^\\.]+\\)$" raw-out-file)
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(cons (match-string 1 raw-out-file)
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(match-string 2 raw-out-file))
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(cons raw-out-file "png")))
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(out-file (concat (car out-file-parts) "_" hash "." (cdr out-file-parts))))
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(prog1
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(cond
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((member org-export-current-backend '(html latex docbook))
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(unless (file-exists-p out-file)
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(mapc ;; remove old hashed versions of this file
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(lambda (file)
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(when (and (string-match (concat (regexp-quote (car out-file-parts))
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"_\\([[:alnum:]]+\\)\\."
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(regexp-quote (cdr out-file-parts)))
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file)
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(= (length (match-string 1 out-file)) 40))
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(delete-file (expand-file-name file
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(file-name-directory out-file)))))
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(directory-files (or (file-name-directory out-file)
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default-directory)))
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(with-temp-file data-file (insert body))
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(message (concat "dot " data-file " " args " -o " out-file))
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(shell-command (concat "dot " data-file " " args " -o " out-file)))
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(format "\n[[file:%s]]\n" out-file))
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(t (concat
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"\n#+BEGIN_EXAMPLE\n"
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body (if (string-match "\n$" body) "" "\n")
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"#+END_EXAMPLE\n")))
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(message "begin_dot blocks are DEPRECATED, use begin_src blocks"))))
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;;--------------------------------------------------------------------------------
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;; comment: export comments in author-specific css-stylable divs
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(defun org-export-blocks-format-comment (body &rest headers)
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"Format comment BODY by OWNER and return it formatted for export.
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Currently, this only does something for HTML export, for all
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other backends, it converts the comment into an EXAMPLE segment."
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(let ((owner (if headers (car headers)))
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(title (if (cdr headers) (mapconcat 'identity (cdr headers) " "))))
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(cond
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((eq org-export-current-backend 'html) ;; We are exporting to HTML
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(concat "#+BEGIN_HTML\n"
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"<div class=\"org-comment\""
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(if owner (format " id=\"org-comment-%s\" " owner))
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">\n"
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(if owner (concat "<b>" owner "</b> ") "")
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(if (and title (> (length title) 0)) (concat " -- " title "<br/>\n") "<br/>\n")
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"<p>\n"
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"#+END_HTML\n"
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body
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"\n#+BEGIN_HTML\n"
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"</p>\n"
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"</div>\n"
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"#+END_HTML\n"))
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(t ;; This is not HTML, so just make it an example.
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(concat "#+BEGIN_EXAMPLE\n"
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(if title (concat "Title:" title "\n") "")
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(if owner (concat "By:" owner "\n") "")
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body
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(if (string-match "\n\\'" body) "" "\n")
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"#+END_EXAMPLE\n")))))
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(provide 'org-exp-blocks)
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;;; org-exp-blocks.el ends here
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