lisp/org-docbook.el

   1 ;;; org-docbook.el --- DocBook exporter for org-mode
   2 ;;
   3 ;; Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   4 ;;
   5 ;; Emacs Lisp Archive Entry
   6 ;; Filename: org-docbook.el
   7 ;; Version: 7.6
   8 ;; Author: Baoqiu Cui <cbaoqiu AT yahoo DOT com>
   9 ;; Maintainer: Baoqiu Cui <cbaoqiu AT yahoo DOT com>
  10 ;; Keywords: org, wp, docbook
  11 ;; Description: Converts an org-mode buffer into DocBook
  12 ;; URL:
  13
  14 ;; This file is part of GNU Emacs.
  15
  16 ;; GNU Emacs is free software: you can redistribute it and/or modify
  17 ;; it under the terms of the GNU General Public License as published by
  18 ;; the Free Software Foundation, either version 3 of the License, or
  19 ;; (at your option) any later version.
  20
  21 ;; GNU Emacs is distributed in the hope that it will be useful,
  22 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 ;; GNU General Public License for more details.
  25
  26 ;; You should have received a copy of the GNU General Public License
  27 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  28
  29 ;;; Commentary:
  30 ;;
  31 ;; This library implements a DocBook exporter for org-mode.  The basic
  32 ;; idea and design is very similar to what `org-export-as-html' has.
  33 ;; Code prototype was also started with `org-export-as-html'.
  34 ;;
  35 ;; Put this file into your load-path and the following line into your
  36 ;; ~/.emacs:
  37 ;;
  38 ;;   (require 'org-docbook)
  39 ;;
  40 ;; The interactive functions are similar to those of the HTML and LaTeX
  41 ;; exporters:
  42 ;;
  43 ;; M-x `org-export-as-docbook'
  44 ;; M-x `org-export-as-docbook-pdf'
  45 ;; M-x `org-export-as-docbook-pdf-and-open'
  46 ;; M-x `org-export-as-docbook-batch'
  47 ;; M-x `org-export-as-docbook-to-buffer'
  48 ;; M-x `org-export-region-as-docbook'
  49 ;; M-x `org-replace-region-by-docbook'
  50 ;;
  51 ;; Note that, in order to generate PDF files using the DocBook XML files
  52 ;; created by DocBook exporter, the following two variables have to be
  53 ;; set based on what DocBook tools you use for XSLT processor and XSL-FO
  54 ;; processor:
  55 ;;
  56 ;;   org-export-docbook-xslt-proc-command
  57 ;;   org-export-docbook-xsl-fo-proc-command
  58 ;;
  59 ;; Check the document of these two variables to see examples of how they
  60 ;; can be set.
  61 ;;
  62 ;; If the Org file to be exported contains special characters written in
  63 ;; TeX-like syntax, like \alpha and \beta, you need to include the right
  64 ;; entity file(s) in the DOCTYPE declaration for the DocBook XML file.
  65 ;; This is required to make the DocBook XML file valid.  The DOCTYPE
  66 ;; declaration string can be set using the following variable:
  67 ;;
  68 ;;   org-export-docbook-doctype
  69 ;;
  70 ;;; Code:
  71
  72 (eval-when-compile
  73   (require 'cl))
  74
  75 (require 'footnote)
  76 (require 'org)
  77 (require 'org-exp)
  78 (require 'org-html)
  79 (require 'format-spec)
  80
  81 ;;; Variables:
  82
  83 (defvar org-docbook-para-open nil)
  84 (defvar org-export-docbook-inline-images t)
  85 (defvar org-export-docbook-link-org-files-as-docbook nil)
  86
  87 (declare-function org-id-find-id-file "org-id" (id))
  88
  89 ;;; User variables:
  90
  91 (defgroup org-export-docbook nil
  92   "Options for exporting Org-mode files to DocBook."
  93   :tag "Org Export DocBook"
  94   :group 'org-export)
  95
  96 (defcustom org-export-docbook-extension ".xml"
  97   "Extension of DocBook XML files."
  98   :group 'org-export-docbook
  99   :type 'string)
 100
 101 (defcustom org-export-docbook-header "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
 102   "Header of DocBook XML files."
 103   :group 'org-export-docbook
 104   :type 'string)
 105
 106 (defcustom org-export-docbook-doctype nil
 107   "DOCTYPE declaration string for DocBook XML files.
 108 This can be used to include entities that are needed to handle
 109 special characters in Org files.
 110
 111 For example, if the Org file to be exported contains XHTML
 112 entities, you can set this variable to:
 113
 114 \"<!DOCTYPE article [
 115 <!ENTITY % xhtml1-symbol PUBLIC
 116 \"-//W3C//ENTITIES Symbol for HTML//EN//XML\"
 117 \"http://www.w3.org/2003/entities/2007/xhtml1-symbol.ent\"
 118 >
 119 %xhtml1-symbol;
 120 ]>
 121 \"
 122
 123 If you want to process DocBook documents without an Internet
 124 connection, it is suggested that you download the required entity
 125 file(s) and use system identifier(s) (external files) in the
 126 DOCTYPE declaration."
 127   :group 'org-export-docbook
 128   :type 'string)
 129
 130 (defcustom org-export-docbook-article-header "<article xmlns=\"http://docbook.org/ns/docbook\"
 131          xmlns:xlink=\"http://www.w3.org/1999/xlink\" version=\"5.0\" xml:lang=\"en\">"
 132   "Article header of DocBook XML files."
 133   :group 'org-export-docbook
 134   :type 'string)
 135
 136 (defcustom org-export-docbook-section-id-prefix "sec-"
 137   "Prefix of section IDs used during exporting.
 138 This can be set before exporting to avoid same set of section IDs
 139 being used again and again, which can be a problem when multiple
 140 people work on the same document."
 141   :group 'org-export-docbook
 142   :type 'string)
 143
 144 (defcustom org-export-docbook-footnote-id-prefix "fn-"
 145   "The prefix of footnote IDs used during exporting.
 146 Like `org-export-docbook-section-id-prefix', this variable can help
 147 avoid same set of footnote IDs being used multiple times."
 148   :group 'org-export-docbook
 149   :type 'string)
 150
 151 (defcustom org-export-docbook-footnote-separator "<superscript>, </superscript>"
 152   "Text used to separate footnotes."
 153   :group 'org-export-docbook
 154   :type 'string)
 155
 156 (defcustom org-export-docbook-emphasis-alist
 157   `(("*" "<emphasis role=\"bold\">" "</emphasis>")
 158     ("/" "<emphasis>" "</emphasis>")
 159     ("_" "<emphasis role=\"underline\">" "</emphasis>")
 160     ("=" "<code>" "</code>")
 161     ("~" "<literal>" "</literal>")
 162     ("+" "<emphasis role=\"strikethrough\">" "</emphasis>"))
 163   "A list of DocBook expressions to convert emphasis fontifiers.
 164 Each element of the list is a list of three elements.
 165 The first element is the character used as a marker for fontification.
 166 The second element is a formatting string to wrap fontified text with.
 167 The third element decides whether to protect converted text from other
 168 conversions."
 169   :group 'org-export-docbook
 170   :type 'alist)
 171
 172 (defcustom org-export-docbook-default-image-attributes
 173   `(("align" . "\"center\"")
 174     ("valign". "\"middle\""))
 175   "Alist of default DocBook image attributes.
 176 These attributes will be inserted into element <imagedata> by
 177 default, but users can override them using `#+ATTR_DocBook:'."
 178   :group 'org-export-docbook
 179   :type 'alist)
 180
 181 (defcustom org-export-docbook-inline-image-extensions
 182   '("jpeg" "jpg" "png" "gif" "svg")
 183   "Extensions of image files that can be inlined into DocBook."
 184   :group 'org-export-docbook
 185   :type '(repeat (string :tag "Extension")))
 186
 187 (defcustom org-export-docbook-coding-system nil
 188   "Coding system for DocBook XML files."
 189   :group 'org-export-docbook
 190   :type 'coding-system)
 191
 192 (defcustom org-export-docbook-xslt-stylesheet nil
 193   "File name of the XSLT stylesheet used by DocBook exporter.
 194 This XSLT stylesheet is used by
 195 `org-export-docbook-xslt-proc-command' to generate the Formatting
 196 Object (FO) files.  You can use either `fo/docbook.xsl' that
 197 comes with DocBook, or any customization layer you may have."
 198   :group 'org-export-docbook
 199   :type 'string)
 200
 201 (defcustom org-export-docbook-xslt-proc-command nil
 202   "Format of XSLT processor command used by DocBook exporter.
 203 This command is used to process a DocBook XML file to generate
 204 the Formatting Object (FO) file.
 205
 206 The value of this variable should be a format control string that
 207 includes three arguments: `%i', `%o', and `%s'.  During exporting
 208 time, `%i' is replaced by the input DocBook XML file name, `%o'
 209 is replaced by the output FO file name, and `%s' is replaced by
 210 `org-export-docbook-xslt-stylesheet' (or the #+XSLT option if it
 211 is specified in the Org file).
 212
 213 For example, if you use Saxon as the XSLT processor, you may want
 214 to set the variable to
 215
 216   \"java com.icl.saxon.StyleSheet -o %o %i %s\"
 217
 218 If you use Xalan, you can set it to
 219
 220   \"java org.apache.xalan.xslt.Process -out %o -in %i -xsl %s\"
 221
 222 For xsltproc, the following string should work:
 223
 224   \"xsltproc --output %o %s %i\"
 225
 226 You can include additional stylesheet parameters in this command.
 227 Just make sure that they meet the syntax requirement of each
 228 processor."
 229   :group 'org-export-docbook
 230   :type 'string)
 231
 232 (defcustom org-export-docbook-xsl-fo-proc-command nil
 233   "Format of XSL-FO processor command used by DocBook exporter.
 234 This command is used to process a Formatting Object (FO) file to
 235 generate the PDF file.
 236
 237 The value of this variable should be a format control string that
 238 includes two arguments: `%i' and `%o'.  During exporting time,
 239 `%i' is replaced by the input FO file name, and `%o' is replaced
 240 by the output PDF file name.
 241
 242 For example, if you use FOP as the XSL-FO processor, you can set
 243 the variable to
 244
 245   \"fop %i %o\""
 246   :group 'org-export-docbook
 247   :type 'string)
 248
 249 (defcustom org-export-docbook-keywords-markup "<literal>%s</literal>"
 250   "A printf format string to be applied to keywords by DocBook exporter."
 251   :group 'org-export-docbook
 252   :type 'string)
 253
 254 (defcustom org-export-docbook-timestamp-markup "<emphasis>%s</emphasis>"
 255   "A printf format string to be applied to time stamps by DocBook exporter."
 256   :group 'org-export-docbook
 257   :type 'string)
 258
 259 ;;; Hooks
 260
 261 (defvar org-export-docbook-final-hook nil
 262   "Hook run at the end of DocBook export, in the new buffer.")
 263
 264 ;;; Autoload functions:
 265
 266 ;;;###autoload
 267 (defun org-export-as-docbook-batch ()
 268   "Call `org-export-as-docbook' in batch style.
 269 This function can be used in batch processing.
 270
 271 For example:
 272
 273 $ emacs --batch
 274         --load=$HOME/lib/emacs/org.el
 275         --visit=MyOrgFile.org --funcall org-export-as-docbook-batch"
 276   (org-export-as-docbook 'hidden))
 277
 278 ;;;###autoload
 279 (defun org-export-as-docbook-to-buffer ()
 280   "Call `org-export-as-docbook' with output to a temporary buffer.
 281 No file is created."
 282   (interactive)
 283   (org-export-as-docbook nil nil "*Org DocBook Export*")
 284   (when org-export-show-temporary-export-buffer
 285     (switch-to-buffer-other-window "*Org DocBook Export*")))
 286
 287 ;;;###autoload
 288 (defun org-replace-region-by-docbook (beg end)
 289   "Replace the region from BEG to END with its DocBook export.
 290 It assumes the region has `org-mode' syntax, and then convert it to
 291 DocBook.  This can be used in any buffer.  For example, you could
 292 write an itemized list in `org-mode' syntax in an DocBook buffer and
 293 then use this command to convert it."
 294   (interactive "r")
 295   (let (reg docbook buf)
 296     (save-window-excursion
 297       (if (org-mode-p)
 298           (setq docbook (org-export-region-as-docbook
 299                          beg end t 'string))
 300         (setq reg (buffer-substring beg end)
 301               buf (get-buffer-create "*Org tmp*"))
 302         (with-current-buffer buf
 303           (erase-buffer)
 304           (insert reg)
 305           (org-mode)
 306           (setq docbook (org-export-region-as-docbook
 307                          (point-min) (point-max) t 'string)))
 308         (kill-buffer buf)))
 309     (delete-region beg end)
 310     (insert docbook)))
 311
 312 ;;;###autoload
 313 (defun org-export-region-as-docbook (beg end &optional body-only buffer)
 314   "Convert region from BEG to END in `org-mode' buffer to DocBook.
 315 If prefix arg BODY-ONLY is set, omit file header and footer and
 316 only produce the region of converted text, useful for
 317 cut-and-paste operations.  If BUFFER is a buffer or a string,
 318 use/create that buffer as a target of the converted DocBook.  If
 319 BUFFER is the symbol `string', return the produced DocBook as a
 320 string and leave not buffer behind.  For example, a Lisp program
 321 could call this function in the following way:
 322
 323   (setq docbook (org-export-region-as-docbook beg end t 'string))
 324
 325 When called interactively, the output buffer is selected, and shown
 326 in a window.  A non-interactive call will only return the buffer."
 327   (interactive "r\nP")
 328   (when (org-called-interactively-p 'any)
 329     (setq buffer "*Org DocBook Export*"))
 330   (let ((transient-mark-mode t)
 331         (zmacs-regions t)
 332         rtn)
 333     (goto-char end)
 334     (set-mark (point)) ;; To activate the region
 335     (goto-char beg)
 336     (setq rtn (org-export-as-docbook
 337                nil nil
 338                buffer body-only))
 339     (if (fboundp 'deactivate-mark) (deactivate-mark))
 340     (if (and (org-called-interactively-p 'any) (bufferp rtn))
 341         (switch-to-buffer-other-window rtn)
 342       rtn)))
 343
 344 ;;;###autoload
 345 (defun org-export-as-docbook-pdf (&optional hidden ext-plist
 346                                             to-buffer body-only pub-dir)
 347   "Export as DocBook XML file, and generate PDF file."
 348   (interactive "P")
 349   (if (or (not org-export-docbook-xslt-proc-command)
 350           (not (string-match "%[ios].+%[ios].+%[ios]" org-export-docbook-xslt-proc-command)))
 351       (error "XSLT processor command is not set correctly"))
 352   (if (or (not org-export-docbook-xsl-fo-proc-command)
 353           (not (string-match "%[io].+%[io]" org-export-docbook-xsl-fo-proc-command)))
 354       (error "XSL-FO processor command is not set correctly"))
 355   (message "Exporting to PDF...")
 356   (let* ((wconfig (current-window-configuration))
 357          (opt-plist
 358           (org-export-process-option-filters
 359            (org-combine-plists (org-default-export-plist)
 360                                ext-plist
 361                                (org-infile-export-plist))))
 362          (docbook-buf (org-export-as-docbook hidden ext-plist
 363                                              to-buffer body-only pub-dir))
 364          (filename (buffer-file-name docbook-buf))
 365          (base (file-name-sans-extension filename))
 366          (fofile (concat base ".fo"))
 367          (pdffile (concat base ".pdf")))
 368     (and (file-exists-p pdffile) (delete-file pdffile))
 369     (message "Processing DocBook XML file...")
 370     (shell-command (format-spec org-export-docbook-xslt-proc-command
 371                                 (format-spec-make
 372                                  ?i (shell-quote-argument filename)
 373                                  ?o (shell-quote-argument fofile)
 374                                  ?s (shell-quote-argument
 375                                      (or (plist-get opt-plist :xslt)
 376                                          org-export-docbook-xslt-stylesheet)))))
 377     (shell-command (format-spec org-export-docbook-xsl-fo-proc-command
 378                                 (format-spec-make
 379                                  ?i (shell-quote-argument fofile)
 380                                  ?o (shell-quote-argument pdffile))))
 381     (message "Processing DocBook file...done")
 382     (if (not (file-exists-p pdffile))
 383         (error "PDF file was not produced")
 384       (set-window-configuration wconfig)
 385       (message "Exporting to PDF...done")
 386       pdffile)))
 387
 388 ;;;###autoload
 389 (defun org-export-as-docbook-pdf-and-open ()
 390   "Export as DocBook XML file, generate PDF file, and open it."
 391   (interactive)
 392   (let ((pdffile (org-export-as-docbook-pdf)))
 393     (if pdffile
 394         (org-open-file pdffile)
 395       (error "PDF file was not produced"))))
 396
 397 ;;;###autoload
 398 (defun org-export-as-docbook (&optional hidden ext-plist
 399                                         to-buffer body-only pub-dir)
 400   "Export the current buffer as a DocBook file.
 401 If there is an active region, export only the region.  When
 402 HIDDEN is obsolete and does nothing.  EXT-PLIST is a
 403 property list with external parameters overriding org-mode's
 404 default settings, but still inferior to file-local settings.
 405 When TO-BUFFER is non-nil, create a buffer with that name and
 406 export to that buffer.  If TO-BUFFER is the symbol `string',
 407 don't leave any buffer behind but just return the resulting HTML
 408 as a string.  When BODY-ONLY is set, don't produce the file
 409 header and footer, simply return the content of the document (all
 410 top-level sections).  When PUB-DIR is set, use this as the
 411 publishing directory."
 412   (interactive "P")
 413   (run-hooks 'org-export-first-hook)
 414
 415   ;; Make sure we have a file name when we need it.
 416   (when (and (not (or to-buffer body-only))
 417              (not buffer-file-name))
 418     (if (buffer-base-buffer)
 419         (org-set-local 'buffer-file-name
 420                        (with-current-buffer (buffer-base-buffer)
 421                          buffer-file-name))
 422       (error "Need a file name to be able to export")))
 423
 424   (message "Exporting...")
 425   (setq-default org-todo-line-regexp org-todo-line-regexp)
 426   (setq-default org-deadline-line-regexp org-deadline-line-regexp)
 427   (setq-default org-done-keywords org-done-keywords)
 428   (setq-default org-maybe-keyword-time-regexp org-maybe-keyword-time-regexp)
 429   (let* ((opt-plist
 430           (org-export-process-option-filters
 431            (org-combine-plists (org-default-export-plist)
 432                                ext-plist
 433                                (org-infile-export-plist))))
 434          (link-validate (plist-get opt-plist :link-validation-function))
 435          valid
 436          (odd org-odd-levels-only)
 437          (region-p (org-region-active-p))
 438          (rbeg (and region-p (region-beginning)))
 439          (rend (and region-p (region-end)))
 440          (subtree-p
 441           (if (plist-get opt-plist :ignore-subtree-p)
 442               nil
 443             (when region-p
 444               (save-excursion
 445                 (goto-char rbeg)
 446                 (and (org-at-heading-p)
 447                      (>= (org-end-of-subtree t t) rend))))))
 448          (level-offset (if subtree-p
 449                            (save-excursion
 450                              (goto-char rbeg)
 451                              (+ (funcall outline-level)
 452                                 (if org-odd-levels-only 1 0)))
 453                          0))
 454          (opt-plist (setq org-export-opt-plist
 455                           (if subtree-p
 456                               (org-export-add-subtree-options opt-plist rbeg)
 457                             opt-plist)))
 458          ;; The following two are dynamically scoped into other
 459          ;; routines below.
 460          (org-current-export-dir
 461           (or pub-dir (org-export-directory :docbook opt-plist)))
 462          (org-current-export-file buffer-file-name)
 463          (level 0) (line "") (origline "") txt todo
 464          (filename (if to-buffer nil
 465                      (expand-file-name
 466                       (concat
 467                        (file-name-sans-extension
 468                         (or (and subtree-p
 469                                  (org-entry-get (region-beginning)
 470                                                 "EXPORT_FILE_NAME" t))
 471                             (file-name-nondirectory buffer-file-name)))
 472                        org-export-docbook-extension)
 473                       (file-name-as-directory
 474                        (or pub-dir (org-export-directory :docbook opt-plist))))))
 475          (current-dir (if buffer-file-name
 476                           (file-name-directory buffer-file-name)
 477                         default-directory))
 478          (buffer (if to-buffer
 479                      (cond
 480                       ((eq to-buffer 'string) (get-buffer-create "*Org DocBook Export*"))
 481                       (t (get-buffer-create to-buffer)))
 482                    (find-file-noselect filename)))
 483          ;; org-levels-open is a global variable
 484          (org-levels-open (make-vector org-level-max nil))
 485          (date (plist-get opt-plist :date))
 486          (author (or (plist-get opt-plist :author)
 487                      user-full-name))
 488          (email (plist-get opt-plist :email))
 489          firstname othername surname
 490          (title (or (and subtree-p (org-export-get-title-from-subtree))
 491                     (plist-get opt-plist :title)
 492                     (and (not
 493                           (plist-get opt-plist :skip-before-1st-heading))
 494                          (org-export-grab-title-from-buffer))
 495                     (and buffer-file-name
 496                          (file-name-sans-extension
 497                           (file-name-nondirectory buffer-file-name)))
 498                     "UNTITLED"))
 499          ;; We will use HTML table formatter to export tables to DocBook
 500          ;; format, so need to set html-table-tag here.
 501          (html-table-tag (plist-get opt-plist :html-table-tag))
 502          (quote-re0   (concat "^[ \t]*" org-quote-string "\\>"))
 503          (quote-re    (concat "^\\(\\*+\\)\\([ \t]+" org-quote-string "\\>\\)"))
 504          (inquote     nil)
 505          (infixed     nil)
 506          (inverse     nil)
 507          (llt org-plain-list-ordered-item-terminator)
 508          (email (plist-get opt-plist :email))
 509          (language (plist-get opt-plist :language))
 510          (lang-words  nil)
 511          cnt
 512          (start 0)
 513          (coding-system (and (boundp 'buffer-file-coding-system)
 514                              buffer-file-coding-system))
 515          (coding-system-for-write (or org-export-docbook-coding-system
 516                                       coding-system))
 517          (save-buffer-coding-system (or org-export-docbook-coding-system
 518                                         coding-system))
 519          (charset (and coding-system-for-write
 520                        (fboundp 'coding-system-get)
 521                        (coding-system-get coding-system-for-write
 522                                           'mime-charset)))
 523          (region
 524           (buffer-substring
 525            (if region-p (region-beginning) (point-min))
 526            (if region-p (region-end) (point-max))))
 527          (org-export-footnotes-seen nil)
 528          (org-export-footnotes-data (org-footnote-all-labels 'with-defs))
 529          (lines
 530           (org-split-string
 531            (org-export-preprocess-string
 532             region
 533             :emph-multiline t
 534             :for-backend 'docbook
 535             :skip-before-1st-heading
 536             (plist-get opt-plist :skip-before-1st-heading)
 537             :drawers (plist-get opt-plist :drawers)
 538             :todo-keywords (plist-get opt-plist :todo-keywords)
 539             :tasks (plist-get opt-plist :tasks)
 540             :tags (plist-get opt-plist :tags)
 541             :priority (plist-get opt-plist :priority)
 542             :footnotes (plist-get opt-plist :footnotes)
 543             :timestamps (plist-get opt-plist :timestamps)
 544             :archived-trees
 545             (plist-get opt-plist :archived-trees)
 546             :select-tags (plist-get opt-plist :select-tags)
 547             :exclude-tags (plist-get opt-plist :exclude-tags)
 548             :add-text
 549             (plist-get opt-plist :text)
 550             :LaTeX-fragments
 551             (plist-get opt-plist :LaTeX-fragments))
 552            "[\r\n]"))
 553          ;; Use literal output to show check boxes.
 554          (checkbox-start
 555           (nth 1 (assoc "=" org-export-docbook-emphasis-alist)))
 556          (checkbox-end
 557           (nth 2 (assoc "=" org-export-docbook-emphasis-alist)))
 558          table-open type
 559          table-buffer table-orig-buffer
 560          ind item-type starter
 561          rpl path attr caption label desc descp desc1 desc2 link
 562          fnc item-tag item-number
 563          footref-seen footnote-list
 564          id-file
 565          )
 566
 567     ;; Fine detailed info about author name.
 568     (if (string-match "\\([^ ]+\\) \\(.+ \\)?\\([^ ]+\\)" author)
 569         (progn
 570           (setq firstname (match-string 1 author)
 571                 othername (or (match-string 2 author) "")
 572                 surname (match-string 3 author))))
 573
 574     ;; Get all footnote text.
 575     (setq footnote-list
 576           (org-export-docbook-get-footnotes lines))
 577
 578     (let ((inhibit-read-only t))
 579       (org-unmodified
 580        (remove-text-properties (point-min) (point-max)
 581                                '(:org-license-to-kill t))))
 582
 583     (setq org-min-level (org-get-min-level lines level-offset))
 584     (setq org-last-level org-min-level)
 585     (org-init-section-numbers)
 586
 587     ;; Get and save the date.
 588     (cond
 589      ((and date (string-match "%" date))
 590       (setq date (format-time-string date)))
 591      (date)
 592      (t (setq date (format-time-string "%Y-%m-%d %T %Z"))))
 593
 594     ;; Get the language-dependent settings
 595     (setq lang-words (or (assoc language org-export-language-setup)
 596                          (assoc "en" org-export-language-setup)))
 597
 598     ;; Switch to the output buffer.  Use fundamental-mode for now.  We
 599     ;; could turn on nXML mode later and do some indentation.
 600     (set-buffer buffer)
 601     (let ((inhibit-read-only t)) (erase-buffer))
 602     (fundamental-mode)
 603     (org-install-letbind)
 604
 605     (and (fboundp 'set-buffer-file-coding-system)
 606          (set-buffer-file-coding-system coding-system-for-write))
 607
 608     ;; The main body...
 609     (let ((case-fold-search nil)
 610           (org-odd-levels-only odd))
 611
 612       ;; Create local variables for all options, to make sure all called
 613       ;; functions get the correct information
 614       (mapc (lambda (x)
 615               (set (make-local-variable (nth 2 x))
 616                    (plist-get opt-plist (car x))))
 617             org-export-plist-vars)
 618
 619       ;; Insert DocBook file header, title, and author info.
 620       (unless body-only
 621         (insert org-export-docbook-header)
 622         (if org-export-docbook-doctype
 623             (insert org-export-docbook-doctype))
 624         (insert "<!-- Date: " date " -->\n")
 625         (insert (format "<!-- DocBook XML file generated by Org-mode %s Emacs %s -->\n"
 626                         org-version emacs-major-version))
 627         (insert org-export-docbook-article-header)
 628         (insert (format
 629                  "\n  <title>%s</title>
 630   <info>
 631     <author>
 632       <personname>
 633         <firstname>%s</firstname> <othername>%s</othername> <surname>%s</surname>
 634       </personname>
 635       %s
 636     </author>
 637   </info>\n"
 638                  (org-docbook-expand title)
 639                  firstname othername surname
 640                  (if (and org-export-email-info
 641                           email (string-match "\\S-" email))
 642                      (concat "<email>" email "</email>") "")
 643                  )))
 644
 645       (org-init-section-numbers)
 646
 647       (org-export-docbook-open-para)
 648
 649       ;; Loop over all the lines...
 650       (while (setq line (pop lines) origline line)
 651         (catch 'nextline
 652
 653           ;; End of quote section?
 654           (when (and inquote (string-match org-outline-regexp-bol line))
 655             (insert "]]></programlisting>\n")
 656             (org-export-docbook-open-para)
 657             (setq inquote nil))
 658           ;; Inside a quote section?
 659           (when inquote
 660             (insert (org-docbook-protect line) "\n")
 661             (throw 'nextline nil))
 662
 663           ;; Fixed-width, verbatim lines (examples)
 664           (when (and org-export-with-fixed-width
 665                      (string-match "^[ \t]*:\\(\\([ \t]\\|$\\)\\(.*\\)\\)" line))
 666             (when (not infixed)
 667               (setq infixed t)
 668               (org-export-docbook-close-para-maybe)
 669               (insert "<programlisting><![CDATA["))
 670             (insert (match-string 3 line) "\n")
 671             (when (or (not lines)
 672                       (not (string-match "^[ \t]*\\(:.*\\)"
 673                                          (car lines))))
 674               (setq infixed nil)
 675               (insert "]]></programlisting>\n")
 676               (org-export-docbook-open-para))
 677             (throw 'nextline nil))
 678
 679           ;; Protected HTML
 680           (when (get-text-property 0 'org-protected line)
 681             (let (par (ind (get-text-property 0 'original-indentation line)))
 682               (when (re-search-backward
 683                      "\\(<para>\\)\\([ \t\r\n]*\\)\\=" (- (point) 100) t)
 684                 (setq par (match-string 1))
 685                 (replace-match "\\2\n"))
 686               (insert line "\n")
 687               (while (and lines
 688                           (or (= (length (car lines)) 0)
 689                               (not ind)
 690                               (equal ind (get-text-property 0 'original-indentation (car lines))))
 691                           (or (= (length (car lines)) 0)
 692                               (get-text-property 0 'org-protected (car lines))))
 693                 (insert (pop lines) "\n"))
 694               (and par (insert "<para>\n")))
 695             (throw 'nextline nil))
 696
 697           ;; Start of block quotes and verses
 698           (when (or (equal "ORG-BLOCKQUOTE-START" line)
 699                     (and (equal "ORG-VERSE-START" line)
 700                          (setq inverse t)))
 701             (org-export-docbook-close-para-maybe)
 702             (insert "<blockquote>")
 703             ;; Check whether attribution for this blockquote exists.
 704             (let (tmp1
 705                   attribution
 706                   (end (if inverse "ORG-VERSE-END" "ORG-BLOCKQUOTE-END"))
 707                   (quote-lines nil))
 708               (while (and (setq tmp1 (pop lines))
 709                           (not (equal end tmp1)))
 710                 (push tmp1 quote-lines))
 711               (push tmp1 lines)         ; Put back quote end mark
 712               ;; Check the last line in the quote to see if it contains
 713               ;; the attribution.
 714               (setq tmp1 (pop quote-lines))
 715               (if (string-match "\\(^.*\\)\\(--[ \t]+\\)\\(.+\\)$" tmp1)
 716                   (progn
 717                     (setq attribution (match-string 3 tmp1))
 718                     (when (save-match-data
 719                             (string-match "[^ \t]" (match-string 1 tmp1)))
 720                       (push (match-string 1 tmp1) lines)))
 721                 (push tmp1 lines))
 722               (while (setq tmp1 (pop quote-lines))
 723                 (push tmp1 lines))
 724               (when attribution
 725                 (insert "<attribution>" attribution "</attribution>")))
 726             ;; Insert <literallayout> for verse.
 727             (if inverse
 728                 (insert "\n<literallayout>")
 729               (org-export-docbook-open-para))
 730             (throw 'nextline nil))
 731
 732           ;; End of block quotes
 733           (when (equal "ORG-BLOCKQUOTE-END" line)
 734             (org-export-docbook-close-para-maybe)
 735             (insert "</blockquote>\n")
 736             (org-export-docbook-open-para)
 737             (throw 'nextline nil))
 738
 739           ;; End of verses
 740           (when (equal "ORG-VERSE-END" line)
 741             (insert "</literallayout>\n</blockquote>\n")
 742             (org-export-docbook-open-para)
 743             (setq inverse nil)
 744             (throw 'nextline nil))
 745
 746           ;; Text centering.  Element <para role="centered"> does not
 747           ;; seem to work with FOP, so for now we use <informaltable> to
 748           ;; center the text, which can contain multiple paragraphs.
 749           (when (equal "ORG-CENTER-START" line)
 750             (org-export-docbook-close-para-maybe)
 751             (insert "<informaltable frame=\"none\" colsep=\"0\" rowsep=\"0\">\n"
 752                     "<tgroup align=\"center\" cols=\"1\">\n"
 753                     "<tbody><row><entry>\n")
 754             (org-export-docbook-open-para)
 755             (throw 'nextline nil))
 756
 757           (when (equal "ORG-CENTER-END" line)
 758             (org-export-docbook-close-para-maybe)
 759             (insert "</entry></row></tbody>\n"
 760                     "</tgroup>\n</informaltable>\n")
 761             (org-export-docbook-open-para)
 762             (throw 'nextline nil))
 763
 764           ;; Make targets to anchors.  Note that currently FOP does not
 765           ;; seem to support <anchor> tags when generating PDF output,
 766           ;; but this can be used in DocBook --> HTML conversion.
 767           (setq start 0)
 768           (while (string-match
 769                   "<<<?\\([^<>]*\\)>>>?\\((INVISIBLE)\\)?[ \t]*\n?" line start)
 770             (cond
 771              ((get-text-property (match-beginning 1) 'org-protected line)
 772               (setq start (match-end 1)))
 773              ((match-end 2)
 774               (setq line (replace-match
 775                           (format "@<anchor xml:id=\"%s\"/>"
 776                                   (org-solidify-link-text (match-string 1 line)))
 777                           t t line)))
 778              (t
 779               (setq line (replace-match
 780                           (format "@<anchor xml:id=\"%s\"/>"
 781                                   (org-solidify-link-text (match-string 1 line)))
 782                           t t line)))))
 783
 784           ;; Put time stamps and related keywords into special mark-up
 785           ;; elements.
 786           (setq line (org-export-docbook-handle-time-stamps line))
 787
 788           ;; Replace "&", "<" and ">" by "&amp;", "&lt;" and "&gt;".
 789           ;; Handle @<..> HTML tags (replace "@&gt;..&lt;" by "<..>").
 790           ;; Also handle sub_superscripts and check boxes.
 791           (or (string-match org-table-hline-regexp line)
 792               (setq line (org-docbook-expand line)))
 793
 794           ;; Format the links
 795           (setq start 0)
 796           (while (string-match org-bracket-link-analytic-regexp++ line start)
 797             (setq start (match-beginning 0))
 798             (setq path (save-match-data (org-link-unescape
 799                                          (match-string 3 line))))
 800             (setq type (cond
 801                         ((match-end 2) (match-string 2 line))
 802                         ((save-match-data
 803                            (or (file-name-absolute-p path)
 804                                (string-match "^\\.\\.?/" path)))
 805                          "file")
 806                         (t "internal")))
 807             (setq path (org-extract-attributes (org-link-unescape path)))
 808             (setq attr (get-text-property 0 'org-attributes path)
 809                   caption (get-text-property 0 'org-caption path)
 810                   label (get-text-property 0 'org-label path))
 811             (setq desc1 (if (match-end 5) (match-string 5 line))
 812                   desc2 (if (match-end 2) (concat type ":" path) path)
 813                   descp (and desc1 (not (equal desc1 desc2)))
 814                   desc (or desc1 desc2))
 815             ;; Make an image out of the description if that is so wanted
 816             (when (and descp (org-file-image-p
 817                               desc org-export-docbook-inline-image-extensions))
 818               (save-match-data
 819                 (if (string-match "^file:" desc)
 820                     (setq desc (substring desc (match-end 0))))))
 821             ;; FIXME: do we need to unescape here somewhere?
 822             (cond
 823              ((equal type "internal")
 824               (setq rpl (format "<link linkend=\"%s\">%s</link>"
 825                                 (org-solidify-link-text
 826                                  (save-match-data (org-link-unescape path)) nil)
 827                                 (org-export-docbook-format-desc desc))))
 828              ((and (equal type "id")
 829                    (setq id-file (org-id-find-id-file path)))
 830               ;; This is an id: link to another file (if it was the same file,
 831               ;; it would have become an internal link...)
 832               (save-match-data
 833                 (setq id-file (file-relative-name
 834                                id-file (file-name-directory org-current-export-file)))
 835                 (setq id-file (concat (file-name-sans-extension id-file)
 836                                       org-export-docbook-extension))
 837                 (setq rpl (format "<link xlink:href=\"%s#%s\">%s</link>"
 838                                   id-file path (org-export-docbook-format-desc desc)))))
 839              ((member type '("http" "https"))
 840               ;; Standard URL, just check if we need to inline an image
 841               (if (and (or (eq t org-export-docbook-inline-images)
 842                            (and org-export-docbook-inline-images (not descp)))
 843                        (org-file-image-p
 844                         path org-export-docbook-inline-image-extensions))
 845                   (setq rpl (org-export-docbook-format-image
 846                              (concat type ":" path)))
 847                 (setq link (concat type ":" path))
 848                 (setq rpl (format "<link xlink:href=\"%s\">%s</link>"
 849                                   (org-export-html-format-href link)
 850                                   (org-export-docbook-format-desc desc)))
 851                 ))
 852              ((member type '("ftp" "mailto" "news"))
 853               ;; Standard URL
 854               (setq link (concat type ":" path))
 855               (setq rpl (format "<link xlink:href=\"%s\">%s</link>"
 856                                 (org-export-html-format-href link)
 857                                 (org-export-docbook-format-desc desc))))
 858              ((string= type "coderef")
 859               (setq rpl (format (org-export-get-coderef-format path (and descp desc))
 860                                 (cdr (assoc path org-export-code-refs)))))
 861              ((functionp (setq fnc (nth 2 (assoc type org-link-protocols))))
 862               ;; The link protocol has a function for format the link
 863               (setq rpl
 864                     (save-match-data
 865                       (funcall fnc (org-link-unescape path) desc1 'html))))
 866
 867              ((string= type "file")
 868               ;; FILE link
 869               (let* ((filename path)
 870                      (abs-p (file-name-absolute-p filename))
 871                      thefile file-is-image-p search)
 872                 (save-match-data
 873                   (if (string-match "::\\(.*\\)" filename)
 874                       (setq search (match-string 1 filename)
 875                             filename (replace-match "" t nil filename)))
 876                   (setq valid
 877                         (if (functionp link-validate)
 878                             (funcall link-validate filename current-dir)
 879                           t))
 880                   (setq file-is-image-p
 881                         (org-file-image-p
 882                          filename org-export-docbook-inline-image-extensions))
 883                   (setq thefile (if abs-p (expand-file-name filename) filename))
 884                   ;; Carry over the properties (expand-file-name will
 885                   ;; discard the properties of filename)
 886                   (add-text-properties 0 (1- (length thefile))
 887                                        (list 'org-caption caption
 888                                              'org-attributes attr
 889                                              'org-label label)
 890                                        thefile)
 891                   (when (and org-export-docbook-link-org-files-as-docbook
 892                              (string-match "\\.org$" thefile))
 893                     (setq thefile (concat (substring thefile 0
 894                                                      (match-beginning 0))
 895                                           org-export-docbook-extension))
 896                     (if (and search
 897                              ;; make sure this is can be used as target search
 898                              (not (string-match "^[0-9]*$" search))
 899                              (not (string-match "^\\*" search))
 900                              (not (string-match "^/.*/$" search)))
 901                         (setq thefile (concat thefile "#"
 902                                               (org-solidify-link-text
 903                                                (org-link-unescape search)))))
 904                     (when (string-match "^file:" desc)
 905                       (setq desc (replace-match "" t t desc))
 906                       (if (string-match "\\.org$" desc)
 907                           (setq desc (replace-match "" t t desc))))))
 908                 (setq rpl (if (and file-is-image-p
 909                                    (or (eq t org-export-docbook-inline-images)
 910                                        (and org-export-docbook-inline-images
 911                                             (not descp))))
 912                               (progn
 913                                 (message "image %s %s" thefile org-docbook-para-open)
 914                                 (org-export-docbook-format-image thefile))
 915                             (format "<link xlink:href=\"%s\">%s</link>"
 916                                     thefile (org-export-docbook-format-desc desc))))
 917                 (if (not valid) (setq rpl desc))))
 918
 919              (t
 920               ;; Just publish the path, as default
 921               (setq rpl (concat "&lt;" type ":"
 922                                 (save-match-data (org-link-unescape path))
 923                                 "&gt;"))))
 924             (setq line (replace-match rpl t t line)
 925                   start (+ start (length rpl))))
 926
 927           ;; TODO items: can we do something better?!
 928           (if (and (string-match org-todo-line-regexp line)
 929                    (match-beginning 2))
 930               (setq line
 931                     (concat (substring line 0 (match-beginning 2))
 932                             "[" (match-string 2 line) "]"
 933                             (substring line (match-end 2)))))
 934
 935           ;; Does this contain a reference to a footnote?
 936           (when org-export-with-footnotes
 937             (setq start 0)
 938             (while (string-match "\\([^* \t].*?\\)\\[\\([0-9]+\\)\\]" line start)
 939               ;; Discard protected matches not clearly identified as
 940               ;; footnote markers.
 941               (if (or (get-text-property (match-beginning 2) 'org-protected line)
 942                       (not (get-text-property (match-beginning 2) 'org-footnote line)))
 943                   (setq start (match-end 2))
 944                 (let* ((num (match-string 2 line))
 945                        (footnote-def (assoc num footnote-list)))
 946                   (if (assoc num footref-seen)
 947                       (setq line (replace-match
 948                                   (format "%s<footnoteref linkend=\"%s%s\"/>"
 949                                           (match-string 1 line)
 950                                           org-export-docbook-footnote-id-prefix num)
 951                                   t t line))
 952                     (setq line (replace-match
 953                                 (concat
 954                                  (format "%s<footnote xml:id=\"%s%s\"><para>%s</para></footnote>"
 955                                          (match-string 1 line)
 956                                          org-export-docbook-footnote-id-prefix
 957                                          num
 958                                          (if footnote-def
 959                                              (save-match-data
 960                                                (org-docbook-expand (cdr footnote-def)))
 961                                            (format "FOOTNOTE DEFINITION NOT FOUND: %s" num)))
 962                                  ;; If another footnote is following the
 963                                  ;; current one, add a separator.
 964                                  (if (save-match-data
 965                                        (string-match "\\`\\[[0-9]+\\]"
 966                                                      (substring line (match-end 0))))
 967                                      org-export-docbook-footnote-separator
 968                                    ""))
 969                                 t t line))
 970                     (push (cons num 1) footref-seen))))))
 971
 972           (cond
 973            ((string-match "^\\(\\*+\\)[ \t]+\\(.*\\)" line)
 974             ;; This is a headline
 975             (setq level (org-tr-level (- (match-end 1) (match-beginning 1)
 976                                          level-offset))
 977                   txt (match-string 2 line))
 978             (if (string-match quote-re0 txt)
 979                 (setq txt (replace-match "" t t txt)))
 980             (org-export-docbook-level-start level txt)
 981             ;; QUOTES
 982             (when (string-match quote-re line)
 983               (org-export-docbook-close-para-maybe)
 984               (insert "<programlisting><![CDATA[")
 985               (setq inquote t)))
 986
 987            ;; Tables: since version 4.3 of DocBook DTD, HTML tables are
 988            ;; supported.  We can use existing HTML table exporter code
 989            ;; here.
 990            ((and org-export-with-tables
 991                  (string-match "^\\([ \t]*\\)\\(|\\|\\+-+\\+\\)" line))
 992             (if (not table-open)
 993                 ;; New table starts
 994                 (setq table-open t
 995                       table-buffer nil
 996                       table-orig-buffer nil))
 997             ;; Accumulate lines
 998             (setq table-buffer (cons line table-buffer)
 999                   table-orig-buffer (cons origline table-orig-buffer))
1000             (when (or (not lines)
1001                       (not (string-match "^\\([ \t]*\\)\\(|\\|\\+-+\\+\\)"
1002                                          (car lines))))
1003               (setq table-open nil
1004                     table-buffer (nreverse table-buffer)
1005                     table-orig-buffer (nreverse table-orig-buffer))
1006               (org-export-docbook-close-para-maybe)
1007               (insert (org-export-docbook-finalize-table
1008                        (org-format-table-html table-buffer table-orig-buffer
1009                                               'no-css)))))
1010
1011            ;; Normal lines
1012            (t
1013             ;; This line either is list item or end a list.
1014             (when (when (get-text-property 0 'list-item line)
1015                       (setq line (org-export-docbook-list-line
1016                           line
1017                           (get-text-property 0 'list-item line)
1018                           (get-text-property 0 'list-struct line)
1019                           (get-text-property 0 'list-prevs line)))))
1020
1021             ;; Empty lines start a new paragraph.  If hand-formatted lists
1022             ;; are not fully interpreted, lines starting with "-", "+", "*"
1023             ;; also start a new paragraph.
1024             (if (and (string-match "^ [-+*]-\\|^[ \t]*$" line)
1025                      (not inverse))
1026                 (org-export-docbook-open-para))
1027
1028             ;; Is this the start of a footnote?
1029             (when org-export-with-footnotes
1030               (when (and (boundp 'footnote-section-tag-regexp)
1031                          (string-match (concat "^" footnote-section-tag-regexp)
1032                                        line))
1033                 ;; ignore this line
1034                 (throw 'nextline nil))
1035               ;; These footnote lines have been read and saved before,
1036               ;; ignore them at this time.
1037               (when (string-match "^[ \t]*\\[\\([0-9]+\\)\\]" line)
1038                 (org-export-docbook-close-para-maybe)
1039                 (throw 'nextline nil)))
1040
1041             ;; FIXME: It might be a good idea to add an option to
1042             ;; support line break processing instruction <?linebreak?>.
1043             ;; Org-mode supports line break "\\" in HTML exporter, and
1044             ;; some DocBook users may also want to force line breaks
1045             ;; even though DocBook only supports that in
1046             ;; <literallayout>.
1047
1048             (insert line "\n")))))
1049
1050       ;; Properly close all local lists and other lists
1051       (when inquote
1052         (insert "]]></programlisting>\n")
1053         (org-export-docbook-open-para))
1054
1055       ;; Close all open sections.
1056       (org-export-docbook-level-start 1 nil)
1057
1058       (unless (plist-get opt-plist :buffer-will-be-killed)
1059         (normal-mode)
1060         (if (eq major-mode (default-value 'major-mode))
1061             (nxml-mode)))
1062
1063       ;; Remove empty paragraphs. Replace them with a newline.
1064       (goto-char (point-min))
1065       (while (re-search-forward
1066               "[ \r\n\t]*\\(<para>\\)[ \r\n\t]*</para>[ \r\n\t]*" nil t)
1067         (when (not (get-text-property (match-beginning 1) 'org-protected))
1068           (replace-match "\n")
1069           (backward-char 1)))
1070       ;; Fill empty sections with <para></para>.  This is to make sure
1071       ;; that the DocBook document generated is valid and well-formed.
1072       (goto-char (point-min))
1073       (while (re-search-forward
1074               "</title>\\([ \r\n\t]*\\)</section>" nil t)
1075         (when (not (get-text-property (match-beginning 0) 'org-protected))
1076           (replace-match "\n<para></para>\n" nil nil nil 1)))
1077       ;; Insert the last closing tag.
1078       (goto-char (point-max))
1079       (unless body-only
1080         (insert "</article>"))
1081       (run-hooks 'org-export-docbook-final-hook)
1082       (or to-buffer (save-buffer))
1083       (goto-char (point-min))
1084       (or (org-export-push-to-kill-ring "DocBook")
1085           (message "Exporting... done"))
1086       (if (eq to-buffer 'string)
1087           (prog1 (buffer-substring (point-min) (point-max))
1088             (kill-buffer (current-buffer)))
1089         (current-buffer)))))
1090
1091 (defun org-export-docbook-open-para ()
1092   "Insert <para>, but first close previous paragraph if any."
1093   (org-export-docbook-close-para-maybe)
1094   (insert "\n<para>")
1095   (setq org-docbook-para-open t))
1096
1097 (defun org-export-docbook-close-para-maybe ()
1098   "Close DocBook paragraph if there is one open."
1099   (when org-docbook-para-open
1100     (insert "</para>\n")
1101     (setq org-docbook-para-open nil)))
1102
1103 (defun org-export-docbook-close-li (&optional type)
1104   "Close list if necessary."
1105   (org-export-docbook-close-para-maybe)
1106   (if (equal type "d")
1107       (insert "</listitem></varlistentry>\n")
1108     (insert "</listitem>\n")))
1109
1110 (defun org-export-docbook-level-start (level title)
1111   "Insert a new level in DocBook export.
1112 When TITLE is nil, just close all open levels."
1113   (org-export-docbook-close-para-maybe)
1114   (let* ((target (and title (org-get-text-property-any 0 'target title)))
1115          (l org-level-max)
1116          section-number)
1117     (while (>= l level)
1118       (if (aref org-levels-open (1- l))
1119           (progn
1120             (insert "</section>\n")
1121             (aset org-levels-open (1- l) nil)))
1122       (setq l (1- l)))
1123     (when title
1124       ;; If title is nil, this means this function is called to close
1125       ;; all levels, so the rest is done only if title is given.
1126       ;;
1127       ;; Format tags: put them into a superscript like format.
1128       (when (string-match (org-re "\\(:[[:alnum:]_@#%:]+:\\)[ \t]*$") title)
1129         (setq title
1130               (replace-match
1131                (if org-export-with-tags
1132                    (save-match-data
1133                      (concat
1134                       "<superscript>"
1135                       (match-string 1 title)
1136                       "</superscript>"))
1137                  "")
1138                t t title)))
1139       (aset org-levels-open (1- level) t)
1140       (setq section-number (org-section-number level))
1141       (insert (format "\n<section xml:id=\"%s%s\">\n<title>%s</title>"
1142                       org-export-docbook-section-id-prefix
1143                       (replace-regexp-in-string "\\." "_" section-number)
1144                       title))
1145       (org-export-docbook-open-para))))
1146
1147 (defun org-docbook-expand (string)
1148   "Prepare STRING for DocBook export.
1149 Applies all active conversions.  If there are links in the
1150 string, don't modify these."
1151   (let* ((re (concat org-bracket-link-regexp "\\|"
1152                      (org-re "[ \t]+\\(:[[:alnum:]_@#%:]+:\\)[ \t]*$")))
1153          m s l res)
1154     (while (setq m (string-match re string))
1155       (setq s (substring string 0 m)
1156             l (match-string 0 string)
1157             string (substring string (match-end 0)))
1158       (push (org-docbook-do-expand s) res)
1159       (push l res))
1160     (push (org-docbook-do-expand string) res)
1161     (apply 'concat (nreverse res))))
1162
1163 (defun org-docbook-do-expand (s)
1164   "Apply all active conversions to translate special ASCII to DocBook."
1165   (setq s (org-html-protect s))
1166   (while (string-match "@&lt;\\([^&]*\\)&gt;" s)
1167     (setq s (replace-match "<\\1>" t nil s)))
1168   (if org-export-with-emphasize
1169       (setq s (org-export-docbook-convert-emphasize s)))
1170   (if org-export-with-special-strings
1171       (setq s (org-export-docbook-convert-special-strings s)))
1172   (if org-export-with-sub-superscripts
1173       (setq s (org-export-docbook-convert-sub-super s)))
1174   (if org-export-with-TeX-macros
1175       (let ((start 0) wd rep)
1176         (while (setq start (string-match "\\\\\\([a-zA-Z]+\\)\\({}\\)?"
1177                                          s start))
1178           (if (get-text-property (match-beginning 0) 'org-protected s)
1179               (setq start (match-end 0))
1180             (setq wd (match-string 1 s))
1181             (if (setq rep (org-entity-get-representation wd 'html))
1182                 (setq s (replace-match rep t t s))
1183               (setq start (+ start (length wd))))))))
1184   s)
1185
1186 (defun org-export-docbook-format-desc (desc)
1187   "Make sure DESC is valid as a description in a link."
1188   (save-match-data
1189     (org-docbook-do-expand desc)))
1190
1191 (defun org-export-docbook-convert-emphasize (string)
1192   "Apply emphasis for DocBook exporting."
1193   (let ((s 0) rpl)
1194     (while (string-match org-emph-re string s)
1195       (if (not (equal
1196                 (substring string (match-beginning 3) (1+ (match-beginning 3)))
1197                 (substring string (match-beginning 4) (1+ (match-beginning 4)))))
1198           (setq s (match-beginning 0)
1199                 rpl
1200                 (concat
1201                  (match-string 1 string)
1202                  (nth 1 (assoc (match-string 3 string)
1203                                org-export-docbook-emphasis-alist))
1204                  (match-string 4 string)
1205                  (nth 2 (assoc (match-string 3 string)
1206                                org-export-docbook-emphasis-alist))
1207                  (match-string 5 string))
1208                 string (replace-match rpl t t string)
1209                 s (+ s (- (length rpl) 2)))
1210         (setq s (1+ s))))
1211     string))
1212
1213 (defun org-docbook-protect (string)
1214   (org-html-protect string))
1215
1216 ;; For now, simply return string as it is.
1217 (defun org-export-docbook-convert-special-strings (string)
1218   "Convert special characters in STRING to DocBook."
1219   string)
1220
1221 (defun org-export-docbook-get-footnotes (lines)
1222   "Given a list of LINES, return a list of alist footnotes."
1223   (let ((list nil) line)
1224     (while (setq line (pop lines))
1225       (if (string-match "^[ \t]*\\[\\([0-9]+\\)\\] \\(.+\\)" line)
1226           (push (cons (match-string 1 line) (match-string 2 line))
1227                 list)))
1228     list))
1229
1230 (defun org-export-docbook-format-image (src)
1231   "Create image element in DocBook."
1232   (save-match-data
1233     (let* ((caption (org-find-text-property-in-string 'org-caption src))
1234            (attr (or (org-find-text-property-in-string 'org-attributes src)
1235                      ""))
1236            (label (org-find-text-property-in-string 'org-label src))
1237            (default-attr org-export-docbook-default-image-attributes)
1238            tmp)
1239       (setq caption (and caption (org-html-do-expand caption)))
1240       (while (setq tmp (pop default-attr))
1241         (if (not (string-match (concat (car tmp) "=") attr))
1242             (setq attr (concat attr " " (car tmp) "=" (cdr tmp)))))
1243       (format "<mediaobject%s>
1244 <imageobject>\n<imagedata fileref=\"%s\" %s/>\n</imageobject>
1245 %s</mediaobject>"
1246               (if label (concat " xml:id=\"" label "\"") "")
1247               src attr
1248               (if caption
1249                   (concat "<caption>\n<para>"
1250                           caption
1251                           "</para>\n</caption>\n")
1252                 "")
1253               ))))
1254
1255 (defun org-export-docbook-preprocess (parameters)
1256   "Extra preprocessing work for DocBook export."
1257   ;; Merge lines starting with "\par" to one line.  Such lines are
1258   ;; regarded as the continuation of a long footnote.
1259   (goto-char (point-min))
1260   (while (re-search-forward "\n\\(\\\\par\\>\\)" nil t)
1261     (if (not (get-text-property (match-beginning 1) 'org-protected))
1262         (replace-match ""))))
1263
1264 (defun org-export-docbook-finalize-table (table)
1265   "Clean up TABLE and turn it into DocBook format.
1266 This function adds a label to the table if it is available, and
1267 also changes TABLE to informaltable if caption does not exist.
1268 TABLE is a string containing the HTML code generated by
1269 `org-format-table-html' for a table in Org-mode buffer."
1270   (let (table-with-label)
1271     ;; Get the label if it exists, and move it into the <table> element.
1272     (setq table-with-label
1273           (if (string-match
1274                "^<table \\(\\(.\\|\n\\)+\\)<a name=\"\\(.+\\)\" id=\".+\"></a>\n\\(\\(.\\|\n\\)+\\)</table>"
1275                table)
1276               (replace-match (concat "<table xml:id=\"" (match-string 3 table) "\" "
1277                                      (match-string 1 table)
1278                                      (match-string 4 table)
1279                                      "</table>")
1280                              nil t table)
1281             table))
1282     ;; Change <table> into <informaltable> if caption does not exist.
1283     (if (string-match
1284          "^<table \\(\\(.\\|\n\\)+\\)<caption></caption>\n\\(\\(.\\|\n\\)+\\)</table>"
1285          table-with-label)
1286         (replace-match (concat "<informaltable "
1287                                (match-string 1 table-with-label)
1288                                (match-string 3 table-with-label)
1289                                "</informaltable>")
1290                        nil t table-with-label)
1291       table-with-label)))
1292
1293 ;; Note: This function is very similar to
1294 ;; org-export-html-convert-sub-super.  They can be merged in the future.
1295 (defun org-export-docbook-convert-sub-super (string)
1296   "Convert sub- and superscripts in STRING for DocBook."
1297   (let (key c (s 0) (requireb (eq org-export-with-sub-superscripts '{})))
1298     (while (string-match org-match-substring-regexp string s)
1299       (cond
1300        ((and requireb (match-end 8)) (setq s (match-end 2)))
1301        ((get-text-property  (match-beginning 2) 'org-protected string)
1302         (setq s (match-end 2)))
1303        (t
1304         (setq s (match-end 1)
1305               key (if (string= (match-string 2 string) "_")
1306                       "subscript"
1307                     "superscript")
1308               c (or (match-string 8 string)
1309                     (match-string 6 string)
1310                     (match-string 5 string))
1311               string (replace-match
1312                       (concat (match-string 1 string)
1313                               "<" key ">" c "</" key ">")
1314                       t t string)))))
1315     (while (string-match "\\\\\\([_^]\\)" string)
1316       (setq string (replace-match (match-string 1 string) t t string)))
1317     string))
1318
1319 (defun org-export-docbook-protect-tags (string)
1320   "Change ``<...>'' in string STRING into ``@<...>''.
1321 This is normally needed when STRING contains DocBook elements
1322 that need to be preserved in later phase of DocBook exporting."
1323   (let ((start 0))
1324     (while (string-match "<\\([^>]*\\)>" string start)
1325       (setq string (replace-match
1326                     "@<\\1>" t nil string)
1327             start (match-end 0)))
1328     string))
1329
1330 (defun org-export-docbook-handle-time-stamps (line)
1331   "Format time stamps in string LINE."
1332   (let (replaced
1333         (kw-markup (org-export-docbook-protect-tags
1334                     org-export-docbook-keywords-markup))
1335         (ts-markup (org-export-docbook-protect-tags
1336                     org-export-docbook-timestamp-markup)))
1337     (while (string-match org-maybe-keyword-time-regexp line)
1338       (setq replaced
1339             (concat replaced
1340                     (substring line 0 (match-beginning 0))
1341                     (if (match-end 1)
1342                         (format kw-markup
1343                                 (match-string 1 line)))
1344                     " "
1345                     (format ts-markup
1346                             (substring (org-translate-time
1347                                         (match-string 3 line)) 1 -1)))
1348             line (substring line (match-end 0))))
1349     (concat replaced line)))
1350
1351 (defun org-export-docbook-list-line (line pos struct prevs)
1352   "Insert list syntax in export buffer. Return LINE, maybe modified.
1353
1354 POS is the item position or line position the line had before
1355 modifications to buffer. STRUCT is the list structure. PREVS is
1356 the alist of previous items."
1357   (let* ((get-type
1358           (function
1359            ;; Translate type of list containing POS to "ordered",
1360            ;; "variable" or "itemized".
1361            (lambda (pos struct prevs)
1362              (let ((type (org-list-get-list-type pos struct prevs)))
1363                (cond
1364                 ((eq 'ordered type) "ordered")
1365                 ((eq 'descriptive type) "variable")
1366                 (t "itemized"))))))
1367          (get-closings
1368           (function
1369            ;; Return list of all items and sublists ending at POS, in
1370            ;; reverse order.
1371            (lambda (pos)
1372              (let (out)
1373                (catch 'exit
1374                  (mapc (lambda (e)
1375                          (let ((end (nth 6 e))
1376                                (item (car e)))
1377                            (cond
1378                             ((= end pos) (push item out))
1379                             ((>= item pos) (throw 'exit nil)))))
1380                        struct))
1381                out)))))
1382     ;; First close any previous item, or list, ending at POS.
1383     (mapc (lambda (e)
1384             (let* ((lastp (= (org-list-get-last-item e struct prevs) e))
1385                    (first-item (org-list-get-list-begin e struct prevs))
1386                    (type (funcall get-type first-item struct prevs)))
1387               ;; Ending for every item
1388               (org-export-docbook-close-para-maybe)
1389               (insert (if (equal type "variable")
1390                           "</listitem></varlistentry>\n"
1391                         "</listitem>\n"))
1392               ;; We're ending last item of the list: end list.
1393               (when lastp
1394                 (insert (format "</%slist>\n" type))
1395                 (org-export-docbook-open-para))))
1396           (funcall get-closings pos))
1397     (cond
1398      ;; At an item: insert appropriate tags in export buffer.
1399      ((assq pos struct)
1400       (string-match (concat "[ \t]*\\(\\S-+[ \t]*\\)"
1401                             "\\(?:\\[@\\(?:start:\\)?\\([0-9]+\\|[a-zA-Z]\\)\\][ \t]*\\)?"
1402                             "\\(?:\\(\\[[ X-]\\]\\)[ \t]+\\)?"
1403                             "\\(?:\\(.*\\)[ \t]+::\\(?:[ \t]+\\|$\\)\\)?"
1404                             "\\(.*\\)")
1405                     line)
1406       (let* ((checkbox (match-string 3 line))
1407              (desc-tag (or (match-string 4 line) "???"))
1408              (body (match-string 5 line))
1409              (list-beg (org-list-get-list-begin pos struct prevs))
1410              (firstp (= list-beg pos))
1411              ;; Always refer to first item to determine list type, in
1412              ;; case list is ill-formed.
1413              (type (funcall get-type list-beg struct prevs))
1414              ;; Special variables for ordered lists.
1415              (counter (let ((count-tmp (org-list-get-counter pos struct)))
1416                         (cond
1417                          ((not count-tmp) nil)
1418                          ((string-match "[A-Za-z]" count-tmp)
1419                           (- (string-to-char (upcase count-tmp)) 64))
1420                          ((string-match "[0-9]+" count-tmp)
1421                           count-tmp)))))
1422         ;; When FIRSTP, a new list or sub-list is starting.
1423         (when firstp
1424           (org-export-docbook-close-para-maybe)
1425           (insert (format "<%slist>\n" type)))
1426         (insert (cond
1427                  ((equal type "variable")
1428                   (format "<varlistentry><term>%s</term><listitem>" desc-tag))
1429                  ((and (equal type "ordered") counter)
1430                   (format "<listitem override=\"%s\">" counter))
1431                  (t "<listitem>")))
1432         ;; For DocBook, we need to open a para right after tag
1433         ;; <listitem>.
1434         (org-export-docbook-open-para)
1435         ;; If line had a checkbox, some additional modification is required.
1436         (when checkbox (setq body (concat checkbox " " body)))
1437         ;; Return modified line
1438         body))
1439      ;; At a list ender:  normal text follows: need <para>.
1440      ((equal "ORG-LIST-END-MARKER" line)
1441       (org-export-docbook-open-para)
1442       (throw 'nextline nil))
1443      ;; Not at an item: return line unchanged (side-effects only).
1444      (t line))))
1445
1446 (provide 'org-docbook)
1447
1448 ;; arch-tag: a24a127c-d365-4c2a-9e9b-f7dcb0ebfdc3
1449 ;;; org-docbook.el ends here