Add koma-letter back-end

* contrib/lisp/org-koma-letter.el: New file.

contrib/lisp/org-koma-letter.el

@@ -0,0 +1,331 @@
+;;; org-koma-letter.el --- KOMA Scrlttr2 Back-End for Org Export Engine
+
+;; Copyright (C) 2007-2012  Free Software Foundation, Inc.
+
+;; Author: Nicolas Goaziou <n.goaziou AT gmail DOT com>
+;;         Alan Schmitt <alan.schmitt AT polytechnique DOT org>
+;; Keywords: org, wp, tex
+
+;; 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 KOMA Scrlttr2 back-end, derived from the
+;; LaTeX one.
+;;
+;; Depending on the desired output format, three commands are provided
+;; for export: `org-koma-letter-export-as-latex' (temporary buffer),
+;; `org-koma-letter-export-to-latex' ("tex" file) and
+;; `org-koma-letter-export-to-pdf' ("pdf" file).
+;;
+;; On top of buffer keywords supported by `e-latex' back-end (see
+;; `org-e-latex-options-alist'), this back-end introduces the
+;; following keywords: "CLOSING" (see `org-koma-letter-closing'),
+;; "FROM_ADDRESS" (see `org-koma-letter-from-address'), "LCO" (see
+;; `org-koma-letter-class-option-file'), "OPENING" (see
+;; `org-koma-letter-opening'), "PHONE_NUMBER" (see
+;; `org-koma-letter-phone-number'), "SIGNATURE" (see
+;; `org-koma-letter-signature') and "TO_ADDRESS".
+;;
+;; You will need to add an appropriate association in
+;; `org-e-latex-classes' in order to use the KOMA Scrlttr2 class.  For
+;; example, you can use the following code:
+;;
+;;   (add-to-list 'org-e-latex-classes
+;;                '("my-letter"
+;;                  "\\documentclass\[%
+;;   DIV=14,
+;;   fontsize=12pt,
+;;   parskip=half,
+;;   subject=titled,
+;;   backaddress=false,
+;;   fromalign=left,
+;;   fromemail=true,
+;;   fromphone=true\]\{scrlttr2\}
+;;   \[DEFAULT-PACKAGES]
+;;   \[PACKAGES]
+;;   \[EXTRA]"))
+;;
+;; Then, in your Org document, be sure to require the proper class
+;; with :
+;;
+;;    #+LATEX_CLASS: my-letter
+
+
+;;; Code:
+
+(require 'org-e-latex)
+
+
+;;; User-Configurable Variables
+
+(defgroup org-export-koma-letter nil
+  "Options for exporting to KOMA scrlttr2 class in LaTeX export."
+  :tag "Org Koma-Letter"
+  :group 'org-export
+  :version "24.2")
+
+(defcustom org-koma-letter-class-option-file "NF"
+  "Letter Class Option File."
+  :group 'org-export-koma-letter
+  :type 'string)
+
+(defcustom org-koma-letter-closing "See you soon,"
+  "Koma-Letter's closing, as a string."
+  :group 'org-export-koma-letter
+  :type 'string)
+
+(defcustom org-koma-letter-from-address "Somewhere \\ Over the rainbow."
+  "Sender's address, as a string."
+  :group 'org-export-koma-letter
+  :type 'string)
+
+(defcustom org-koma-letter-opening "Dear Sir,"
+  "Letter's opening, as a string."
+  :group 'org-export-koma-letter
+  :type 'string)
+
+(defcustom org-koma-letter-phone-number "00-00-00-00"
+  "Sender's phone number, as a string."
+  :group 'org-export-koma-letter
+  :type 'string)
+
+(defcustom org-koma-letter-signature "\\usekomavar{fromname}"
+  "String used as the signature."
+  :group 'org-export-koma-letter
+  :type 'string)
+
+
+;;; Define Back-End
+
+(org-export-define-derived-backend koma-letter e-latex
+  :options-alist
+  ((:closing "CLOSING" nil org-koma-letter-closing)
+   (:from-address "FROM_ADDRESS" nil org-koma-letter-from-address newline)
+   (:lco "LCO" nil org-koma-letter-class-option-file)
+   (:opening "OPENING" nil org-koma-letter-opening)
+   (:phone-number "PHONE_NUMBER" nil org-koma-letter-phone-number)
+   (:signature "SIGNATURE" nil nil newline)
+   (:to-address "TO_ADDRESS" nil nil newline))
+  :translate-alist ((export-block . org-koma-letter-export-block)
+                    (export-snippet . org-koma-letter-export-snippet)
+                    (keyword . org-koma-letter-keyword)
+                    (template . org-koma-letter-template))
+  :menu-entry
+  (?k "Export with KOMA Scrlttr2"
+      ((?K "As TEX buffer" org-koma-letter-export-as-latex)
+       (?k "As TEX file" org-koma-letter-export-to-latex)
+       (?p "As PDF file" org-koma-letter-export-to-pdf)
+       (?O "As PDF file and open"
+           (lambda (s v b)
+             (org-open-file (org-koma-letter-export-to-pdf s v b)))))))
+
+
+;;; Transcode Functions
+
+;;;; Export Block
+
+(defun org-koma-letter-export-block (export-block contents info)
+  "Transcode an EXPORT-BLOCK element into KOMA Scrlttr2 code.
+CONTENTS is nil.  INFO is a plist used as a communication
+channel."
+  (when (member (org-element-property :type export-block) '("KOMA-LETTER" "LATEX"))
+    (org-remove-indentation (org-element-property :value export-block))))
+
+;;;; Export Snippet
+
+(defun org-koma-letter-export-snippet (export-snippet contents info)
+  "Transcode an EXPORT-SNIPPET object into KOMA Scrlttr2 code.
+CONTENTS is nil.  INFO is a plist used as a communication
+channel."
+  (when (memq (org-export-snippet-backend export-snippet) '(e-latex koma-letter))
+    (org-element-property :value export-snippet)))
+
+;;;; Keyword
+
+(defun org-koma-letter-keyword (keyword contents info)
+  "Transcode a KEYWORD element into KOMA Scrlttr2 code.
+CONTENTS is nil.  INFO is a plist used as a communication
+channel."
+  (let ((key (org-element-property :key keyword))
+        (value (org-element-property :value keyword)))
+    ;; Handle specifically BEAMER and TOC (headlines only) keywords.
+    ;; Otherwise, fallback to `e-latex' back-end.
+    (if (equal key "KOMA-LETTER") value
+      (org-export-with-backend 'e-latex keyword contents info))))
+
+;;;; Template
+
+(defun org-koma-letter-template (contents info)
+  "Return complete document string after KOMA Scrlttr2 conversion.
+CONTENTS is the transcoded contents string.  INFO is a plist
+holding export options."
+  (concat
+   ;; Time-stamp.
+   (and (plist-get info :time-stamp-file)
+        (format-time-string "%% Created %Y-%m-%d %a %H:%M\n"))
+   ;; Document class and packages.
+   (let ((class (plist-get info :latex-class))
+         (class-options (plist-get info :latex-class-options)))
+     (org-element-normalize-string
+      (let* ((header (nth 1 (assoc class org-e-latex-classes)))
+             (document-class-string
+              (and (stringp header)
+                   (if class-options
+                       (replace-regexp-in-string
+                        "^[ \t]*\\\\documentclass\\(\\[.*?\\]\\)"
+                        class-options header t nil 1)
+                     header))))
+        (when document-class-string
+          (org-e-latex--guess-babel-language
+           (org-e-latex--guess-inputenc
+            (org-splice-latex-header
+             document-class-string
+             org-export-latex-default-packages-alist ; defined in org.el
+             org-export-latex-packages-alist nil ; defined in org.el
+             (plist-get info :latex-header-extra)))
+           info)))))
+   ;; Define "From" data.
+   (format "\\setkomavar{fromname}{%s}\n"
+           (org-export-data (plist-get info :author) info))
+   (format "\\setkomavar{fromaddress}{%s}\n" (plist-get info :from-address))
+   (format "\\setkomavar{signature}{%s}\n" (plist-get info :signature))
+   (format "\\setkomavar{fromemail}{%s}\n"
+           (org-export-data (plist-get info :email) info))
+   (format "\\setkomavar{fromphone}{%s}\n" (plist-get info :phone-number))
+   ;; Date.
+   (format "\\date{%s}\n" (org-export-data (plist-get info :date) info))
+   ;; Letter Class Option File
+   (format "\\LoadLetterOption{%s}\n" (plist-get info :lco))
+   ;; Letter start.
+   "\\begin{document}\n\n"
+   (format "\\setkomavar{subject}{%s}\n\n"
+           (org-export-data (plist-get info :title) info))
+   (format "\\begin{letter}{%%\n%s}\n\n" (or (plist-get info :to-address) "no address given"))
+   ;; Opening.
+   (format "\\opening{%s}\n\n" (plist-get info :opening))
+   ;; Letter body.
+   contents
+   ;; Closing.
+   (format "\n\\closing{%s}\n\n" (plist-get info :closing))
+   ;; Letter end.
+   "\\end{letter}\n\\end{document}"))
+
+
+
+;;; Commands
+
+;;;###autoload
+(defun org-koma-letter-export-as-latex
+  (&optional subtreep visible-only body-only ext-plist)
+  "Export current buffer as a KOMA Scrlttr2 letter.
+
+If narrowing is active in the current buffer, only export its
+narrowed part.
+
+If a region is active, export that region.
+
+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.
+
+When optional argument BODY-ONLY is non-nil, only write code
+between \"\\begin{letter}\" and \"\\end{letter}\".
+
+EXT-PLIST, when provided, is a property list with external
+parameters overriding Org default settings, but still inferior to
+file-local settings.
+
+Export is done in a buffer named \"*Org KOMA-LETTER Export*\".  It
+will be displayed if `org-export-show-temporary-export-buffer' is
+non-nil."
+  (interactive)
+  (let ((outbuf (org-export-to-buffer
+                 'koma-letter "*Org KOMA-LETTER Export*"
+                 subtreep visible-only body-only ext-plist)))
+    (with-current-buffer outbuf (LaTeX-mode))
+    (when org-export-show-temporary-export-buffer
+      (switch-to-buffer-other-window outbuf))))
+
+;;;###autoload
+(defun org-koma-letter-export-to-latex
+  (&optional subtreep visible-only body-only ext-plist pub-dir)
+  "Export current buffer as a KOMA Scrlttr2 letter (tex).
+
+If narrowing is active in the current buffer, only export its
+narrowed part.
+
+If a region is active, export that region.
+
+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.
+
+When optional argument BODY-ONLY is non-nil, only write code
+between \"\\begin{letter}\" and \"\\end{letter}\".
+
+EXT-PLIST, when provided, is a property list with external
+parameters overriding Org default settings, but still inferior to
+file-local settings.
+
+When optional argument PUB-DIR is set, use it as the publishing
+directory.
+
+Return output file's name."
+  (interactive)
+  (let ((outfile (org-export-output-file-name ".tex" subtreep pub-dir)))
+    (org-export-to-file
+     'koma-letter outfile subtreep visible-only body-only ext-plist)))
+
+;;;###autoload
+(defun org-koma-letter-export-to-pdf
+  (&optional subtreep visible-only body-only ext-plist pub-dir)
+  "Export current buffer as a KOMA Scrlttr2 letter (pdf).
+
+If narrowing is active in the current buffer, only export its
+narrowed part.
+
+If a region is active, export that region.
+
+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.
+
+When optional argument BODY-ONLY is non-nil, only write code
+between \"\\begin{letter}\" and \"\\end{letter}\".
+
+EXT-PLIST, when provided, is a property list with external
+parameters overriding Org default settings, but still inferior to
+file-local settings.
+
+When optional argument PUB-DIR is set, use it as the publishing
+directory.
+
+Return PDF file's name."
+  (interactive)
+  (org-e-latex-compile
+   (org-koma-letter-export-to-latex
+    subtreep visible-only body-only ext-plist pub-dir)))
+
+(provide 'org-koma-letter)
+;;; org-koma-letter.el ends here