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
| | ;;; ob-latex.el --- org-babel functions for latex "evaluation"
;; Copyright (C) 2009-2013 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;; 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:
;; Org-Babel support for evaluating LaTeX source code.
;;
;; Currently on evaluation this returns raw LaTeX code, unless a :file
;; header argument is given in which case small png or pdf files will
;; be created directly form the latex source code.
;;; Code:
(require 'ob)
(declare-function org-create-formula-image "org" (string tofile options buffer))
(declare-function org-splice-latex-header "org"
(tpl def-pkg pkg snippets-p &optional extra))
(declare-function org-latex-guess-inputenc "ox-latex" (header))
(declare-function org-latex-compile "ox-latex" (file))
(defvar org-babel-tangle-lang-exts)
(add-to-list 'org-babel-tangle-lang-exts '("latex" . "tex"))
(defvar org-format-latex-header) ; From org.el
(defvar org-format-latex-options) ; From org.el
(defvar org-latex-default-packages-alist) ; From org.el
(defvar org-latex-packages-alist) ; From org.el
(defvar org-babel-default-header-args-latex
'((:results . "latex") (:exports . "results"))
"Default arguments to use when evaluating a LaTeX source block.")
(defun org-babel-expand-body:latex (body params)
"Expand BODY according to PARAMS, return the expanded body."
(mapc (lambda (pair) ;; replace variables
(setq body
(replace-regexp-in-string
(regexp-quote (format "%S" (car pair)))
(if (stringp (cdr pair))
(cdr pair) (format "%S" (cdr pair)))
body))) (mapcar #'cdr (org-babel-get-header params :var)))
(org-babel-trim body))
(defun org-babel-execute:latex (body params)
"Execute a block of Latex code with Babel.
This function is called by `org-babel-execute-src-block'."
(setq body (org-babel-expand-body:latex body params))
(if (cdr (assoc :file params))
(let* ((out-file (cdr (assoc :file params)))
(tex-file (org-babel-temp-file "latex-" ".tex"))
(border (cdr (assoc :border params)))
(imagemagick (cdr (assoc :imagemagick params)))
(im-in-options (cdr (assoc :iminoptions params)))
(im-out-options (cdr (assoc :imoutoptions params)))
(pdfpng (cdr (assoc :pdfpng params)))
(fit (or (cdr (assoc :fit params)) border))
(height (and fit (cdr (assoc :pdfheight params))))
(width (and fit (cdr (assoc :pdfwidth params))))
(headers (cdr (assoc :headers params)))
(in-buffer (not (string= "no" (cdr (assoc :buffer params)))))
(org-latex-packages-alist
(append (cdr (assoc :packages params)) org-latex-packages-alist)))
(cond
((and (string-match "\\.png$" out-file) (not imagemagick))
(org-create-formula-image
body out-file org-format-latex-options in-buffer))
((or (string-match "\\.pdf$" out-file) imagemagick)
(with-temp-file tex-file
(require 'ox-latex)
(insert
(org-latex-guess-inputenc
(org-splice-latex-header
org-format-latex-header
(delq
nil
(mapcar
(lambda (el)
(unless (and (listp el) (string= "hyperref" (cadr el)))
el))
org-latex-default-packages-alist))
org-latex-packages-alist
nil))
(if fit "\n\\usepackage[active, tightpage]{preview}\n" "")
(if border (format "\\setlength{\\PreviewBorder}{%s}" border) "")
(if height (concat "\n" (format "\\pdfpageheight %s" height)) "")
(if width (concat "\n" (format "\\pdfpagewidth %s" width)) "")
(if headers
(concat "\n"
(if (listp headers)
(mapconcat #'identity headers "\n")
headers) "\n")
"")
(if fit
(concat "\n\\begin{document}\n\\begin{preview}\n" body
"\n\\end{preview}\n\\end{document}\n")
(concat "\n\\begin{document}\n" body "\n\\end{document}\n"))))
(when (file-exists-p out-file) (delete-file out-file))
(let ((transient-pdf-file (org-babel-latex-tex-to-pdf tex-file)))
(cond
((string-match "\\.pdf$" out-file)
(rename-file transient-pdf-file out-file))
(imagemagick
(convert-pdf
transient-pdf-file out-file im-in-options im-out-options)
(when (file-exists-p transient-pdf-file)
(delete-file transient-pdf-file))))))
((string-match "\\.\\([^\\.]+\\)$" out-file)
(error "Can not create %s files, please specify a .png or .pdf file or try the :imagemagick header argument"
(match-string 1 out-file))))
nil) ;; signal that output has already been written to file
body))
(defun convert-pdf (pdffile out-file im-in-options im-out-options)
"Generate a file from a pdf file using imagemagick."
(let ((cmd (concat "convert " im-in-options " " pdffile " "
im-out-options " " out-file)))
(message (concat "Converting pdffile file " cmd "..."))
(shell-command cmd)))
(defun org-babel-latex-tex-to-pdf (file)
"Generate a pdf file according to the contents FILE."
(require 'ox-latex)
(org-latex-compile file))
(defun org-babel-prep-session:latex (session params)
"Return an error because LaTeX doesn't support sessions."
(error "LaTeX does not support sessions"))
(provide 'ob-latex)
;;; ob-latex.el ends here
|