lisp/org-docbook.el

   1 ;;; org-docbook.el --- DocBook exporter for org-mode
   2 ;;
   3 ;; Copyright (C) 2007-2011 Free Software Foundation, Inc.
   4 ;;
   5 ;; Emacs Lisp Archive Entry
   6 ;; Filename: org-docbook.el
   7 ;; Author: Baoqiu Cui <cbaoqiu AT yahoo DOT com>
   8 ;; Maintainer: Baoqiu Cui <cbaoqiu AT yahoo DOT com>
   9 ;; Keywords: org, wp, docbook
  10 ;; Description: Converts an org-mode buffer into DocBook
  11 ;; URL:
  12
  13 ;; This file is part of GNU Emacs.
  14
  15 ;; GNU Emacs is free software: you can redistribute it and/or modify
  16 ;; it under the terms of the GNU General Public License as published by
  17 ;; the Free Software Foundation, either version 3 of the License, or
  18 ;; (at your option) any later version.
  19
  20 ;; GNU Emacs is distributed in the hope that it will be useful,
  21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 ;; GNU General Public License for more details.
  24
  25 ;; You should have received a copy of the GNU General Public License
  26 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  27
  28 ;;; Commentary:
  29 ;;
  30 ;; This library implements a DocBook exporter for org-mode.  The basic
  31 ;; idea and design is very similar to what `org-export-as-html' has.
  32 ;; Code prototype was also started with `org-export-as-html'.
  33 ;;
  34 ;; Put this file into your load-path and the following line into your
  35 ;; ~/.emacs:
  36 ;;
  37 ;;   (require 'org-docbook)
  38 ;;
  39 ;; The interactive functions are similar to those of the HTML and LaTeX
  40 ;; exporters:
  41 ;;
  42 ;; M-x `org-export-as-docbook'
  43 ;; M-x `org-export-as-docbook-pdf'
  44 ;; M-x `org-export-as-docbook-pdf-and-open'
  45 ;; M-x `org-export-as-docbook-batch'
  46 ;; M-x `org-export-as-docbook-to-buffer'
  47 ;; M-x `org-export-region-as-docbook'
  48 ;; M-x `org-replace-region-by-docbook'
  49 ;;
  50 ;; Note that, in order to generate PDF files using the DocBook XML files
  51 ;; created by DocBook exporter, the following two variables have to be
  52 ;; set based on what DocBook tools you use for XSLT processor and XSL-FO
  53 ;; processor:
  54 ;;
  55 ;;   org-export-docbook-xslt-proc-command
  56 ;;   org-export-docbook-xsl-fo-proc-command
  57 ;;
  58 ;; Check the document of these two variables to see examples of how they
  59 ;; can be set.
  60 ;;
  61 ;; If the Org file to be exported contains special characters written in
  62 ;; TeX-like syntax, like \alpha and \beta, you need to include the right
  63 ;; entity file(s) in the DOCTYPE declaration for the DocBook XML file.
  64 ;; This is required to make the DocBook XML file valid.  The DOCTYPE
  65 ;; declaration string can be set using the following variable:
  66 ;;
  67 ;;   org-export-docbook-doctype
  68 ;;
  69 ;;; Code:
  70
  71 (eval-when-compile
  72   (require 'cl))
  73
  74 (require 'footnote)
  75 (require 'org)
  76 (require 'org-exp)
  77 (require 'org-html)
  78 (require 'format-spec)
  79
  80 ;;; Variables:
  81
  82 (defvar org-docbook-para-open nil)
  83 (defvar org-export-docbook-inline-images t)
  84 (defvar org-export-docbook-link-org-files-as-docbook nil)
  85
  86 (declare-function org-id-find-id-file "org-id" (id))
  87
  88 ;;; User variables:
  89
  90 (defgroup org-export-docbook nil
  91   "Options for exporting Org-mode files to DocBook."
  92   :tag "Org Export DocBook"
  93   :group 'org-export)
  94
  95 (defcustom org-export-docbook-extension ".xml"
  96   "Extension of DocBook XML files."
  97   :group 'org-export-docbook
  98   :type 'string)
  99
 100 (defcustom org-export-docbook-header "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
 101   "Header of DocBook XML files."
 102   :group 'org-export-docbook
 103   :type 'string)
 104
 105 (defcustom org-export-docbook-doctype nil
 106   "DOCTYPE declaration string for DocBook XML files.
 107 This can be used to include entities that are needed to handle
 108 special characters in Org files.
 109
 110 For example, if the Org file to be exported contains XHTML
 111 entities, you can set this variable to:
 112
 113 \"<!DOCTYPE article [
 114 <!ENTITY % xhtml1-symbol PUBLIC
 115 \"-//W3C//ENTITIES Symbol for HTML//EN//XML\"
 116 \"http://www.w3.org/2003/entities/2007/xhtml1-symbol.ent\"
 117 >
 118 %xhtml1-symbol;
 119 ]>
 120 \"
 121
 122 If you want to process DocBook documents without an Internet
 123 connection, it is suggested that you download the required entity
 124 file(s) and use system identifier(s) (external files) in the
 125 DOCTYPE declaration."
 126   :group 'org-export-docbook
 127   :type 'string)
 128
 129 (defcustom org-export-docbook-article-header "<article xmlns=\"http://docbook.org/ns/docbook\"
 130          xmlns:xlink=\"http://www.w3.org/1999/xlink\" version=\"5.0\" xml:lang=\"en\">"
 131   "Article header of DocBook XML files."
 132   :group 'org-export-docbook
 133   :type 'string)
 134
 135 (defcustom org-export-docbook-section-id-prefix "sec-"
 136   "Prefix of section IDs used during exporting.
 137 This can be set before exporting to avoid same set of section IDs
 138 being used again and again, which can be a problem when multiple
 139 people work on the same document."
 140   :group 'org-export-docbook
 141   :type 'string)
 142
 143 (defcustom org-export-docbook-footnote-id-prefix "fn-"
 144   "The prefix of footnote IDs used during exporting.
 145 Like `org-export-docbook-section-id-prefix', this variable can help
 146 avoid same set of footnote IDs being used multiple times."
 147   :group 'org-export-docbook
 148   :type 'string)
 149
 150 (defcustom org-export-docbook-footnote-separator "<superscript>, </superscript>"
 151   "Text used to separate footnotes."
 152   :group 'org-export-docbook
 153   :type 'string)
 154
 155 (defcustom org-export-docbook-emphasis-alist
 156   `(("*" "<emphasis role=\"bold\">" "</emphasis>")
 157     ("/" "<emphasis>" "</emphasis>")
 158     ("_" "<emphasis role=\"underline\">" "</emphasis>")
 159     ("=" "<code>" "</code>")
 160     ("~" "<literal>" "</literal>")
 161     ("+" "<emphasis role=\"strikethrough\">" "</emphasis>"))
 162   "A list of DocBook expressions to convert emphasis fontifiers.
 163 Each element of the list is a list of three elements.
 164 The first element is the character used as a marker for fontification.
 165 The second element is a formatting string to wrap fontified text with.
 166 The third element decides whether to protect converted text from other
 167 conversions."
 168   :group 'org-export-docbook
 169   :type 'alist)
 170
 171 (defcustom org-export-docbook-default-image-attributes
 172   `(("align" . "\"center\"")
 173     ("valign". "\"middle\""))
 174   "Alist of default DocBook image attributes.
 175 These attributes will be inserted into element <imagedata> by
 176 default, but users can override them using `#+ATTR_DocBook:'."
 177   :group 'org-export-docbook
 178   :type 'alist)
 179
 180 (defcustom org-export-docbook-inline-image-extensions
 181   '("jpeg" "jpg" "png" "gif" "svg")
 182   "Extensions of image files that can be inlined into DocBook."
 183   :group 'org-export-docbook
 184   :type '(repeat (string :tag "Extension")))
 185
 186 (defcustom org-export-docbook-coding-system nil
 187   "Coding system for DocBook XML files."
 188   :group 'org-export-docbook
 189   :type 'coding-system)
 190
 191 (defcustom org-export-docbook-xslt-stylesheet nil
 192   "File name of the XSLT stylesheet used by DocBook exporter.
 193 This XSLT stylesheet is used by
 194 `org-export-docbook-xslt-proc-command' to generate the Formatting
 195 Object (FO) files.  You can use either `fo/docbook.xsl' that
 196 comes with DocBook, or any customization layer you may have."
 197   :group 'org-export-docbook
 198   :type 'string)
 199
 200 (defcustom org-export-docbook-xslt-proc-command nil
 201   "Format of XSLT processor command used by DocBook exporter.
 202 This command is used to process a DocBook XML file to generate
 203 the Formatting Object (FO) file.
 204
 205 The value of this variable should be a format control string that
 206 includes three arguments: `%i', `%o', and `%s'.  During exporting
 207 time, `%i' is replaced by the input DocBook XML file name, `%o'
 208 is replaced by the output FO file name, and `%s' is replaced by
 209 `org-export-docbook-xslt-stylesheet' (or the #+XSLT option if it
 210 is specified in the Org file).
 211
 212 For example, if you use Saxon as the XSLT processor, you may want
 213 to set the variable to
 214
 215   \"java com.icl.saxon.StyleSheet -o %o %i %s\"
 216
 217 If you use Xalan, you can set it to
 218
 219   \"java org.apache.xalan.xslt.Process -out %o -in %i -xsl %s\"
 220
 221 For xsltproc, the following string should work:
 222
 223   \"xsltproc --output %o %s %i\"
 224
 225 You can include additional stylesheet parameters in this command.
 226 Just make sure that they meet the syntax requirement of each
 227 processor."
 228   :group 'org-export-docbook
 229   :type 'string)
 230
 231 (defcustom org-export-docbook-xsl-fo-proc-command nil
 232   "Format of XSL-FO processor command used by DocBook exporter.
 233 This command is used to process a Formatting Object (FO) file to
 234 generate the PDF file.
 235
 236 The value of this variable should be a format control string that
 237 includes two arguments: `%i' and `%o'.  During exporting time,
 238 `%i' is replaced by the input FO file name, and `%o' is replaced
 239 by the output PDF file name.
 240
 241 For example, if you use FOP as the XSL-FO processor, you can set
 242 the variable to
 243
 244   \"fop %i %o\""
 245   :group 'org-export-docbook
 246   :type 'string)
 247
 248 (defcustom org-export-docbook-keywords-markup "<literal>%s</literal>"
 249   "A printf format string to be applied to keywords by DocBook exporter."
 250   :group 'org-export-docbook
 251   :type 'string)
 252
 253 (defcustom org-export-docbook-timestamp-markup "<emphasis>%s</emphasis>"
 254   "A printf format string to be applied to time stamps by DocBook exporter."
 255   :group 'org-export-docbook
 256   :type 'string)
 257
 258 ;;; Hooks
 259
 260 (defvar org-export-docbook-final-hook nil
 261   "Hook run at the end of DocBook export, in the new buffer.")
 262
 263 ;;; Autoload functions:
 264
 265 ;;;###autoload
 266 (defun org-export-as-docbook-batch ()
 267   "Call `org-export-as-docbook' in batch style.
 268 This function can be used in batch processing.
 269
 270 For example:
 271
 272 $ emacs --batch
 273         --load=$HOME/lib/emacs/org.el
 274         --visit=MyOrgFile.org --funcall org-export-as-docbook-batch"
 275   (org-export-as-docbook 'hidden))
 276
 277 ;;;###autoload
 278 (defun org-export-as-docbook-to-buffer ()
 279   "Call `org-export-as-docbook' with output to a temporary buffer.
 280 No file is created."
 281   (interactive)
 282   (org-export-as-docbook nil nil "*Org DocBook Export*")
 283   (when org-export-show-temporary-export-buffer
 284     (switch-to-buffer-other-window "*Org DocBook Export*")))
 285
 286 ;;;###autoload
 287 (defun org-replace-region-by-docbook (beg end)
 288   "Replace the region from BEG to END with its DocBook export.
 289 It assumes the region has `org-mode' syntax, and then convert it to
 290 DocBook.  This can be used in any buffer.  For example, you could
 291 write an itemized list in `org-mode' syntax in an DocBook buffer and
 292 then use this command to convert it."
 293   (interactive "r")
 294   (let (reg docbook buf)
 295     (save-window-excursion
 296       (if (org-mode-p)
 297           (setq docbook (org-export-region-as-docbook
 298                          beg end t 'string))
 299         (setq reg (buffer-substring beg end)
 300               buf (get-buffer-create "*Org tmp*"))
 301         (with-current-buffer buf
 302           (erase-buffer)
 303           (insert reg)
 304           (org-mode)
 305           (setq docbook (org-export-region-as-docbook
 306                          (point-min) (point-max) t 'string)))
 307         (kill-buffer buf)))
 308     (delete-region beg end)
 309     (insert docbook)))
 310
 311 ;;;###autoload
 312 (defun org-export-region-as-docbook (beg end &optional body-only buffer)
 313   "Convert region from BEG to END in `org-mode' buffer to DocBook.
 314 If prefix arg BODY-ONLY is set, omit file header and footer and
 315 only produce the region of converted text, useful for
 316 cut-and-paste operations.  If BUFFER is a buffer or a string,
 317 use/create that buffer as a target of the converted DocBook.  If
 318 BUFFER is the symbol `string', return the produced DocBook as a
 319 string and leave not buffer behind.  For example, a Lisp program
 320 could call this function in the following way:
 321
 322   (setq docbook (org-export-region-as-docbook beg end t 'string))
 323
 324 When called interactively, the output buffer is selected, and shown
 325 in a window.  A non-interactive call will only return the buffer."
 326   (interactive "r\nP")
 327   (when (org-called-interactively-p 'any)
 328     (setq buffer "*Org DocBook Export*"))
 329   (let ((transient-mark-mode t)
 330         (zmacs-regions t)
 331         rtn)
 332     (goto-char end)
 333     (set-mark (point)) ;; To activate the region
 334     (goto-char beg)
 335     (setq rtn (org-export-as-docbook
 336                nil nil
 337                buffer body-only))
 338     (if (fboundp 'deactivate-mark) (deactivate-mark))
 339     (if (and (org-called-interactively-p 'any) (bufferp rtn))
 340         (switch-to-buffer-other-window rtn)
 341       rtn)))
 342
 343 ;;;###autoload
 344 (defun org-export-as-docbook-pdf (&optional hidden ext-plist
 345                                             to-buffer body-only pub-dir)
 346   "Export as DocBook XML file, and generate PDF file."
 347   (interactive "P")
 348   (if (or (not org-export-docbook-xslt-proc-command)
 349           (not (string-match "%[ios].+%[ios].+%[ios]" org-export-docbook-xslt-proc-command)))
 350       (error "XSLT processor command is not set correctly"))
 351   (if (or (not org-export-docbook-xsl-fo-proc-command)
 352           (not (string-match "%[io].+%[io]" org-export-docbook-xsl-fo-proc-command)))
 353       (error "XSL-FO processor command is not set correctly"))
 354   (message "Exporting to PDF...")
 355   (let* ((wconfig (current-window-configuration))
 356          (opt-plist
 357           (org-export-process-option-filters
 358            (org-combine-plists (org-default-export-plist)
 359                                ext-plist
 360                                (org-infile-export-plist))))
 361          (docbook-buf (org-export-as-docbook hidden ext-plist
 362                                              to-buffer body-only pub-dir))
 363          (filename (buffer-file-name docbook-buf))
 364          (base (file-name-sans-extension filename))
 365          (fofile (concat base ".fo"))
 366          (pdffile (concat base ".pdf")))
 367     (and (file-exists-p pdffile) (delete-file pdffile))
 368     (message "Processing DocBook XML file...")
 369     (shell-command (format-spec org-export-docbook-xslt-proc-command
 370                                 (format-spec-make
 371                                  ?i (shell-quote-argument filename)
 372                                  ?o (shell-quote-argument fofile)
 373                                  ?s (shell-quote-argument
 374                                      (or (plist-get opt-plist :xslt)
 375                                          org-export-docbook-xslt-stylesheet)))))
 376     (shell-command (format-spec org-export-docbook-xsl-fo-proc-command
 377                                 (format-spec-make
 378                                  ?i (shell-quote-argument fofile)
 379                                  ?o (shell-quote-argument pdffile))))
 380     (message "Processing DocBook file...done")
 381     (if (not (file-exists-p pdffile))
 382         (error "PDF file was not produced")
 383       (set-window-configuration wconfig)
 384       (message "Exporting to PDF...done")
 385       pdffile)))
 386
 387 ;;;###autoload
 388 (defun org-export-as-docbook-pdf-and-open ()
 389   "Export as DocBook XML file, generate PDF file, and open it."
 390   (interactive)
 391   (let ((pdffile (org-export-as-docbook-pdf)))
 392     (if pdffile
 393         (org-open-file pdffile)
 394       (error "PDF file was not produced"))))
 395
 396 ;;;###autoload
 397 (defun org-export-as-docbook (&optional hidden ext-plist
 398                                         to-buffer body-only pub-dir)
 399   "Export the current buffer as a DocBook file.
 400 If there is an active region, export only the region.  When
 401 HIDDEN is obsolete and does nothing.  EXT-PLIST is a
 402 property list with external parameters overriding org-mode's
 403 default settings, but still inferior to file-local settings.
 404 When TO-BUFFER is non-nil, create a buffer with that name and
 405 export to that buffer.  If TO-BUFFER is the symbol `string',
 406 don't leave any buffer behind but just return the resulting HTML
 407 as a string.  When BODY-ONLY is set, don't produce the file
 408 header and footer, simply return the content of the document (all
 409 top-level sections).  When PUB-DIR is set, use this as the
 410 publishing directory."
 411   (interactive "P")
 412   (run-hooks 'org-export-first-hook)
 413
 414   ;; Make sure we have a file name when we need it.
 415   (when (and (not (or to-buffer body-only))
 416              (not buffer-file-name))
 417     (if (buffer-base-buffer)
 418         (org-set-local 'buffer-file-name
 419                        (with-current-buffer (buffer-base-buffer)
 420                          buffer-file-name))
 421       (error "Need a file name to be able to export")))
 422
 423   (message "Exporting...")
 424   (setq-default org-todo-line-regexp org-todo-line-regexp)
 425   (setq-default org-deadline-line-regexp org-deadline-line-regexp)
 426   (setq-default org-done-keywords org-done-keywords)
 427   (setq-default org-maybe-keyword-time-regexp org-maybe-keyword-time-regexp)
 428   (let* ((opt-plist
 429           (org-export-process-option-filters
 430            (org-combine-plists (org-default-export-plist)
 431                                ext-plist
 432                                (org-infile-export-plist))))
 433          (link-validate (plist-get opt-plist :link-validation-function))
 434          valid
 435          (odd org-odd-levels-only)
 436          (region-p (org-region-active-p))
 437          (rbeg (and region-p (region-beginning)))
 438          (rend (and region-p (region-end)))
 439          (subtree-p
 440           (if (plist-get opt-plist :ignore-subtree-p)
 441               nil
 442             (when region-p
 443               (save-excursion
 444                 (goto-char rbeg)
 445                 (and (org-at-heading-p)
 446                      (>= (org-end-of-subtree t t) rend))))))
 447          (level-offset (if subtree-p
 448                            (save-excursion
 449                              (goto-char rbeg)
 450                              (+ (funcall outline-level)
 451                                 (if org-odd-levels-only 1 0)))
 452                          0))
 453          (opt-plist (setq org-export-opt-plist
 454                           (if subtree-p
 455                               (org-export-add-subtree-options opt-plist rbeg)
 456                             opt-plist)))
 457          ;; The following two are dynamically scoped into other
 458          ;; routines below.
 459          (org-current-export-dir
 460           (or pub-dir (org-export-directory :docbook opt-plist)))
 461          (org-current-export-file buffer-file-name)
 462          (level 0) (line "") (origline "") txt todo
 463          (filename (if to-buffer nil
 464                      (expand-file-name
 465                       (concat
 466                        (file-name-sans-extension
 467                         (or (and subtree-p
 468                                  (org-entry-get (region-beginning)
 469                                                 "EXPORT_FILE_NAME" t))
 470                             (file-name-nondirectory buffer-file-name)))
 471                        org-export-docbook-extension)
 472                       (file-name-as-directory
 473                        (or pub-dir (org-export-directory :docbook opt-plist))))))
 474          (current-dir (if buffer-file-name
 475                           (file-name-directory buffer-file-name)
 476                         default-directory))
 477          (buffer (if to-buffer
 478                      (cond
 479                       ((eq to-buffer 'string) (get-buffer-create "*Org DocBook Export*"))
 480                       (t (get-buffer-create to-buffer)))
 481                    (find-file-noselect filename)))
 482          ;; org-levels-open is a global variable
 483          (org-levels-open (make-vector org-level-max nil))
 484          (date (plist-get opt-plist :date))
 485          (author (or (plist-get opt-plist :author)
 486                      user-full-name))
 487          (email (plist-get opt-plist :email))
 488          firstname othername surname
 489          (title (or (and subtree-p (org-export-get-title-from-subtree))
 490                     (plist-get opt-plist :title)
 491                     (and (not
 492                           (plist-get opt-plist :skip-before-1st-heading))
 493                          (org-export-grab-title-from-buffer))
 494                     (and buffer-file-name
 495                          (file-name-sans-extension
 496                           (file-name-nondirectory buffer-file-name)))
 497                     "UNTITLED"))
 498          ;; We will use HTML table formatter to export tables to DocBook
 499          ;; format, so need to set html-table-tag here.
 500          (html-table-tag (plist-get opt-plist :html-table-tag))
 501          (quote-re0   (concat "^[ \t]*" org-quote-string "\\>"))
 502          (quote-re    (concat "^\\(\\*+\\)\\([ \t]+" org-quote-string "\\>\\)"))
 503          (inquote     nil)
 504          (infixed     nil)
 505          (inverse     nil)
 506          (llt org-plain-list-ordered-item-terminator)
 507          (email (plist-get opt-plist :email))
 508          (language (plist-get opt-plist :language))
 509          (lang-words  nil)
 510          cnt
 511          (start 0)
 512          (coding-system (and (boundp 'buffer-file-coding-system)
 513                              buffer-file-coding-system))
 514          (coding-system-for-write (or org-export-docbook-coding-system
 515                                       coding-system))
 516          (save-buffer-coding-system (or org-export-docbook-coding-system
 517                                         coding-system))
 518          (charset (and coding-system-for-write
 519                        (fboundp 'coding-system-get)
 520                        (coding-system-get coding-system-for-write
 521                                           'mime-charset)))
 522          (region
 523           (buffer-substring
 524            (if region-p (region-beginning) (point-min))
 525            (if region-p (region-end) (point-max))))
 526          (org-export-footnotes-seen nil)
 527          (org-export-footnotes-data (org-footnote-all-labels 'with-defs))
 528          (lines
 529           (org-split-string
 530            (org-export-preprocess-string
 531             region
 532             :emph-multiline t
 533             :for-backend 'docbook
 534             :skip-before-1st-heading
 535             (plist-get opt-plist :skip-before-1st-heading)
 536             :drawers (plist-get opt-plist :drawers)
 537             :todo-keywords (plist-get opt-plist :todo-keywords)
 538             :tasks (plist-get opt-plist :tasks)
 539             :tags (plist-get opt-plist :tags)
 540             :priority (plist-get opt-plist :priority)
 541             :footnotes (plist-get opt-plist :footnotes)
 542             :timestamps (plist-get opt-plist :timestamps)
 543             :archived-trees
 544             (plist-get opt-plist :archived-trees)
 545             :select-tags (plist-get opt-plist :select-tags)
 546             :exclude-tags (plist-get opt-plist :exclude-tags)
 547             :add-text
 548             (plist-get opt-plist :text)
 549             :LaTeX-fragments
 550             (plist-get opt-plist :LaTeX-fragments))
 551            "[\r\n]"))
 552          ;; Use literal output to show check boxes.
 553          (checkbox-start
 554           (nth 1 (assoc "=" org-export-docbook-emphasis-alist)))
 555          (checkbox-end
 556           (nth 2 (assoc "=" org-export-docbook-emphasis-alist)))
 557          table-open type
 558          table-buffer table-orig-buffer
 559          ind item-type starter
 560          rpl path attr caption label desc descp desc1 desc2 link
 561          fnc item-tag item-number
 562          footref-seen footnote-list
 563          id-file
 564          )
 565
 566     ;; Fine detailed info about author name.
 567     (if (string-match "\\([^ ]+\\) \\(.+ \\)?\\([^ ]+\\)" author)
 568         (progn
 569           (setq firstname (match-string 1 author)
 570                 othername (or (match-string 2 author) "")
 571                 surname (match-string 3 author))))
 572
 573     ;; Get all footnote text.
 574     (setq footnote-list
 575           (org-export-docbook-get-footnotes lines))
 576
 577     (let ((inhibit-read-only t))
 578       (org-unmodified
 579        (remove-text-properties (point-min) (point-max)
 580                                '(:org-license-to-kill t))))
 581
 582     (setq org-min-level (org-get-min-level lines level-offset))
 583     (setq org-last-level org-min-level)
 584     (org-init-section-numbers)
 585
 586     ;; Get and save the date.
 587     (cond
 588      ((and date (string-match "%" date))
 589       (setq date (format-time-string date)))
 590      (date)
 591      (t (setq date (format-time-string "%Y-%m-%d %T %Z"))))
 592
 593     ;; Get the language-dependent settings
 594     (setq lang-words (or (assoc language org-export-language-setup)
 595                          (assoc "en" org-export-language-setup)))
 596
 597     ;; Switch to the output buffer.  Use fundamental-mode for now.  We
 598     ;; could turn on nXML mode later and do some indentation.
 599     (set-buffer buffer)
 600     (let ((inhibit-read-only t)) (erase-buffer))
 601     (fundamental-mode)
 602     (org-install-letbind)
 603
 604     (and (fboundp 'set-buffer-file-coding-system)
 605          (set-buffer-file-coding-system coding-system-for-write))
 606
 607     ;; The main body...
 608     (let ((case-fold-search nil)
 609           (org-odd-levels-only odd))
 610
 611       ;; Create local variables for all options, to make sure all called
 612       ;; functions get the correct information
 613       (mapc (lambda (x)
 614               (set (make-local-variable (nth 2 x))
 615                    (plist-get opt-plist (car x))))
 616             org-export-plist-vars)
 617
 618       ;; Insert DocBook file header, title, and author info.
 619       (unless body-only
 620         (insert org-export-docbook-header)
 621         (if org-export-docbook-doctype
 622             (insert org-export-docbook-doctype))
 623         (insert "<!-- Date: " date " -->\n")
 624         (insert (format "<!-- DocBook XML file generated by Org-mode %s Emacs %s -->\n"
 625                         org-version emacs-major-version))
 626         (insert org-export-docbook-article-header)
 627         (insert (format
 628                  "\n  <title>%s</title>
 629   <info>
 630     <author>
 631       <personname>
 632         <firstname>%s</firstname> <othername>%s</othername> <surname>%s</surname>
 633       </personname>
 634       %s
 635     </author>
 636   </info>\n"
 637                  (org-docbook-expand title)
 638                  firstname othername surname
 639                  (if (and org-export-email-info
 640                           email (string-match "\\S-" email))
 641                      (concat "<email>" email "</email>") "")
 642                  )))
 643
 644       (org-init-section-numbers)
 645
 646       (org-export-docbook-open-para)
 647
 648       ;; Loop over all the lines...
 649       (while (setq line (pop lines) origline line)
 650         (catch 'nextline
 651
 652           ;; End of quote section?
 653           (when (and inquote (string-match org-outline-regexp-bol line))
 654             (insert "]]></programlisting>\n")
 655             (org-export-docbook-open-para)
 656             (setq inquote nil))
 657           ;; Inside a quote section?
 658           (when inquote
 659             (insert (org-docbook-protect line) "\n")
 660             (throw 'nextline nil))
 661
 662           ;; Fixed-width, verbatim lines (examples)
 663           (when (and org-export-with-fixed-width
 664                      (string-match "^[ \t]*:\\(\\([ \t]\\|$\\)\\(.*\\)\\)" line))
 665             (when (not infixed)
 666               (setq infixed t)
 667               (org-export-docbook-close-para-maybe)
 668               (insert "<programlisting><![CDATA["))
 669             (insert (match-string 3 line) "\n")
 670             (when (or (not lines)
 671                       (not (string-match "^[ \t]*\\(:.*\\)"
 672                                          (car lines))))
 673               (setq infixed nil)
 674               (insert "]]></programlisting>\n")
 675               (org-export-docbook-open-para))
 676             (throw 'nextline nil))
 677
 678           ;; Protected HTML
 679           (when (get-text-property 0 'org-protected line)
 680             (let (par (ind (get-text-property 0 'original-indentation line)))
 681               (when (re-search-backward
 682                      "\\(<para>\\)\\([ \t\r\n]*\\)\\=" (- (point) 100) t)
 683                 (setq par (match-string 1))
 684                 (replace-match "\\2\n"))
 685               (insert line "\n")
 686               (while (and lines
 687                           (or (= (length (car lines)) 0)
 688                               (not ind)
 689                               (equal ind (get-text-property 0 'original-indentation (car lines))))
 690                           (or (= (length (car lines)) 0)
 691                               (get-text-property 0 'org-protected (car lines))))
 692                 (insert (pop lines) "\n"))
 693               (and par (insert "<para>\n")))
 694             (throw 'nextline nil))
 695
 696           ;; Start of block quotes and verses
 697           (when (or (equal "ORG-BLOCKQUOTE-START" line)
 698                     (and (equal "ORG-VERSE-START" line)
 699                          (setq inverse t)))
 700             (org-export-docbook-close-para-maybe)
 701             (insert "<blockquote>")
 702             ;; Check whether attribution for this blockquote exists.
 703             (let (tmp1
 704                   attribution
 705                   (end (if inverse "ORG-VERSE-END" "ORG-BLOCKQUOTE-END"))
 706                   (quote-lines nil))
 707               (while (and (setq tmp1 (pop lines))
 708                           (not (equal end tmp1)))
 709                 (push tmp1 quote-lines))
 710               (push tmp1 lines)         ; Put back quote end mark
 711               ;; Check the last line in the quote to see if it contains
 712               ;; the attribution.
 713               (setq tmp1 (pop quote-lines))
 714               (if (string-match "\\(^.*\\)\\(--[ \t]+\\)\\(.+\\)$" tmp1)
 715                   (progn
 716                     (setq attribution (match-string 3 tmp1))
 717                     (when (save-match-data
 718                             (string-match "[^ \t]" (match-string 1 tmp1)))
 719                       (push (match-string 1 tmp1) lines)))
 720                 (push tmp1 lines))
 721               (while (setq tmp1 (pop quote-lines))
 722                 (push tmp1 lines))
 723               (when attribution
 724                 (insert "<attribution>" attribution "</attribution>")))
 725             ;; Insert <literallayout> for verse.
 726             (if inverse
 727                 (insert "\n<literallayout>")
 728               (org-export-docbook-open-para))
 729             (throw 'nextline nil))
 730
 731           ;; End of block quotes
 732           (when (equal "ORG-BLOCKQUOTE-END" line)
 733             (org-export-docbook-close-para-maybe)
 734             (insert "</blockquote>\n")
 735             (org-export-docbook-open-para)
 736             (throw 'nextline nil))
 737
 738           ;; End of verses
 739           (when (equal "ORG-VERSE-END" line)
 740             (insert "</literallayout>\n</blockquote>\n")
 741             (org-export-docbook-open-para)
 742             (setq inverse nil)
 743             (throw 'nextline nil))
 744
 745           ;; Text centering.  Element <para role="centered"> does not
 746           ;; seem to work with FOP, so for now we use <informaltable> to
 747           ;; center the text, which can contain multiple paragraphs.
 748           (when (equal "ORG-CENTER-START" line)
 749             (org-export-docbook-close-para-maybe)
 750             (insert "<informaltable frame=\"none\" colsep=\"0\" rowsep=\"0\">\n"
 751                     "<tgroup align=\"center\" cols=\"1\">\n"
 752                     "<tbody><row><entry>\n")
 753             (org-export-docbook-open-para)
 754             (throw 'nextline nil))
 755
 756           (when (equal "ORG-CENTER-END" line)
 757             (org-export-docbook-close-para-maybe)
 758             (insert "</entry></row></tbody>\n"
 759                     "</tgroup>\n</informaltable>\n")
 760             (org-export-docbook-open-para)
 761             (throw 'nextline nil))
 762
 763           ;; Make targets to anchors.  Note that currently FOP does not
 764           ;; seem to support <anchor> tags when generating PDF output,
 765           ;; but this can be used in DocBook --> HTML conversion.
 766           (setq start 0)
 767           (while (string-match
 768                   "<<<?\\([^<>]*\\)>>>?\\((INVISIBLE)\\)?[ \t]*\n?" line start)
 769             (cond
 770              ((get-text-property (match-beginning 1) 'org-protected line)
 771               (setq start (match-end 1)))
 772              ((match-end 2)
 773               (setq line (replace-match
 774                           (format "@<anchor xml:id=\"%s\"/>"
 775                                   (org-solidify-link-text (match-string 1 line)))
 776                           t t line)))
 777              (t
 778               (setq line (replace-match
 779                           (format "@<anchor xml:id=\"%s\"/>"
 780                                   (org-solidify-link-text (match-string 1 line)))
 781                           t t line)))))
 782
 783           ;; Put time stamps and related keywords into special mark-up
 784           ;; elements.
 785           (setq line (org-export-docbook-handle-time-stamps line))
 786
 787           ;; Replace "&", "<" and ">" by "&amp;", "&lt;" and "&gt;".
 788           ;; Handle @<..> HTML tags (replace "@&gt;..&lt;" by "<..>").
 789           ;; Also handle sub_superscripts and check boxes.
 790           (or (string-match org-table-hline-regexp line)
 791               (setq line (org-docbook-expand line)))
 792
 793           ;; Format the links
 794           (setq start 0)
 795           (while (string-match org-bracket-link-analytic-regexp++ line start)
 796             (setq start (match-beginning 0))
 797             (setq path (save-match-data (org-link-unescape
 798                                          (match-string 3 line))))
 799             (setq type (cond
 800                         ((match-end 2) (match-string 2 line))
 801                         ((save-match-data
 802                            (or (file-name-absolute-p path)
 803                                (string-match "^\\.\\.?/" path)))
 804                          "file")
 805                         (t "internal")))
 806             (setq path (org-extract-attributes (org-link-unescape path)))
 807             (setq attr (get-text-property 0 'org-attributes path)
 808                   caption (get-text-property 0 'org-caption path)
 809                   label (get-text-property 0 'org-label path))
 810             (setq desc1 (if (match-end 5) (match-string 5 line))
 811                   desc2 (if (match-end 2) (concat type ":" path) path)
 812                   descp (and desc1 (not (equal desc1 desc2)))
 813                   desc (or desc1 desc2))
 814             ;; Make an image out of the description if that is so wanted
 815             (when (and descp (org-file-image-p
 816                               desc org-export-docbook-inline-image-extensions))
 817               (save-match-data
 818                 (if (string-match "^file:" desc)
 819                     (setq desc (substring desc (match-end 0))))))
 820             ;; FIXME: do we need to unescape here somewhere?
 821             (cond
 822              ((equal type "internal")
 823               (setq rpl (format "<link linkend=\"%s\">%s</link>"
 824                                 (org-solidify-link-text
 825                                  (save-match-data (org-link-unescape path)) nil)
 826                                 (org-export-docbook-format-desc desc))))
 827              ((and (equal type "id")
 828                    (setq id-file (org-id-find-id-file path)))
 829               ;; This is an id: link to another file (if it was the same file,
 830               ;; it would have become an internal link...)
 831               (save-match-data
 832                 (setq id-file (file-relative-name
 833                                id-file (file-name-directory org-current-export-file)))
 834                 (setq id-file (concat (file-name-sans-extension id-file)
 835                                       org-export-docbook-extension))
 836                 (setq rpl (format "<link xlink:href=\"%s#%s\">%s</link>"
 837                                   id-file path (org-export-docbook-format-desc desc)))))
 838              ((member type '("http" "https"))
 839               ;; Standard URL, just check if we need to inline an image
 840               (if (and (or (eq t org-export-docbook-inline-images)
 841                            (and org-export-docbook-inline-images (not descp)))
 842                        (org-file-image-p
 843                         path org-export-docbook-inline-image-extensions))
 844                   (setq rpl (org-export-docbook-format-image
 845                              (concat type ":" path)))
 846                 (setq link (concat type ":" path))
 847                 (setq rpl (format "<link xlink:href=\"%s\">%s</link>"
 848                                   (org-export-html-format-href link)
 849                                   (org-export-docbook-format-desc desc)))
 850                 ))
 851              ((member type '("ftp" "mailto" "news"))
 852               ;; Standard URL
 853               (setq link (concat type ":" path))
 854               (setq rpl (format "<link xlink:href=\"%s\">%s</link>"
 855                                 (org-export-html-format-href link)
 856                                 (org-export-docbook-format-desc desc))))
 857              ((string= type "coderef")
 858               (setq rpl (format (org-export-get-coderef-format path (and descp desc))
 859                                 (cdr (assoc path org-export-code-refs)))))
 860              ((functionp (setq fnc (nth 2 (assoc type org-link-protocols))))
 861               ;; The link protocol has a function for format the link
 862               (setq rpl
 863                     (save-match-data
 864                       (funcall fnc (org-link-unescape path) desc1 'html))))
 865
 866              ((string= type "file")
 867               ;; FILE link
 868               (let* ((filename path)
 869                      (abs-p (file-name-absolute-p filename))
 870                      thefile file-is-image-p search)
 871                 (save-match-data
 872                   (if (string-match "::\\(.*\\)" filename)
 873                       (setq search (match-string 1 filename)
 874                             filename (replace-match "" t nil filename)))
 875                   (setq valid
 876                         (if (functionp link-validate)
 877                             (funcall link-validate filename current-dir)
 878                           t))
 879                   (setq file-is-image-p
 880                         (org-file-image-p
 881                          filename org-export-docbook-inline-image-extensions))
 882                   (setq thefile (if abs-p (expand-file-name filename) filename))
 883                   ;; Carry over the properties (expand-file-name will
 884                   ;; discard the properties of filename)
 885                   (add-text-properties 0 (1- (length thefile))
 886                                        (list 'org-caption caption
 887                                              'org-attributes attr
 888                                              'org-label label)
 889                                        thefile)
 890                   (when (and org-export-docbook-link-org-files-as-docbook
 891                              (string-match "\\.org$" thefile))
 892                     (setq thefile (concat (substring thefile 0
 893                                                      (match-beginning 0))
 894                                           org-export-docbook-extension))
 895                     (if (and search
 896                              ;; make sure this is can be used as target search
 897                              (not (string-match "^[0-9]*$" search))
 898                              (not (string-match "^\\*" search))
 899                              (not (string-match "^/.*/$" search)))
 900                         (setq thefile (concat thefile "#"
 901                                               (org-solidify-link-text
 902                                                (org-link-unescape search)))))
 903                     (when (string-match "^file:" desc)
 904                       (setq desc (replace-match "" t t desc))
 905                       (if (string-match "\\.org$" desc)
 906                           (setq desc (replace-match "" t t desc))))))
 907                 (setq rpl (if (and file-is-image-p
 908                                    (or (eq t org-export-docbook-inline-images)
 909                                        (and org-export-docbook-inline-images
 910                                             (not descp))))
 911                               (progn
 912                                 (message "image %s %s" thefile org-docbook-para-open)
 913                                 (org-export-docbook-format-image thefile))
 914                             (format "<link xlink:href=\"%s\">%s</link>"
 915                                     thefile (org-export-docbook-format-desc desc))))
 916                 (if (not valid) (setq rpl desc))))
 917
 918              (t
 919               ;; Just publish the path, as default
 920               (setq rpl (concat "&lt;" type ":"
 921                                 (save-match-data (org-link-unescape path))
 922                                 "&gt;"))))
 923             (setq line (replace-match rpl t t line)
 924                   start (+ start (length rpl))))
 925
 926           ;; TODO items: can we do something better?!
 927           (if (and (string-match org-todo-line-regexp line)
 928                    (match-beginning 2))
 929               (setq line
 930                     (concat (substring line 0 (match-beginning 2))
 931                             "[" (match-string 2 line) "]"
 932                             (substring line (match-end 2)))))
 933
 934           ;; Does this contain a reference to a footnote?
 935           (when org-export-with-footnotes
 936             (setq start 0)
 937             (while (string-match "\\([^* \t].*?\\)\\[\\([0-9]+\\)\\]" line start)
 938               ;; Discard protected matches not clearly identified as
 939               ;; footnote markers.
 940               (if (or (get-text-property (match-beginning 2) 'org-protected line)
 941                       (not (get-text-property (match-beginning 2) 'org-footnote line)))
 942                   (setq start (match-end 2))
 943                 (let* ((num (match-string 2 line))
 944                        (footnote-def (assoc num footnote-list)))
 945                   (if (assoc num footref-seen)
 946                       (setq line (replace-match
 947                                   (format "%s<footnoteref linkend=\"%s%s\"/>"
 948                                           (match-string 1 line)
 949                                           org-export-docbook-footnote-id-prefix num)
 950                                   t t line))
 951                     (setq line (replace-match
 952                                 (concat
 953                                  (format "%s<footnote xml:id=\"%s%s\"><para>%s</para></footnote>"
 954                                          (match-string 1 line)
 955                                          org-export-docbook-footnote-id-prefix
 956                                          num
 957                                          (if footnote-def
 958                                              (save-match-data
 959                                                (org-docbook-expand (cdr footnote-def)))
 960                                            (format "FOOTNOTE DEFINITION NOT FOUND: %s" num)))
 961                                  ;; If another footnote is following the
 962                                  ;; current one, add a separator.
 963                                  (if (save-match-data
 964                                        (string-match "\\`\\[[0-9]+\\]"
 965                                                      (substring line (match-end 0))))
 966                                      org-export-docbook-footnote-separator
 967                                    ""))
 968                                 t t line))
 969                     (push (cons num 1) footref-seen))))))
 970
 971           (cond
 972            ((string-match "^\\(\\*+\\)[ \t]+\\(.*\\)" line)
 973             ;; This is a headline
 974             (setq level (org-tr-level (- (match-end 1) (match-beginning 1)
 975                                          level-offset))
 976                   txt (match-string 2 line))
 977             (if (string-match quote-re0 txt)
 978                 (setq txt (replace-match "" t t txt)))
 979             (org-export-docbook-level-start level txt)
 980             ;; QUOTES
 981             (when (string-match quote-re line)
 982               (org-export-docbook-close-para-maybe)
 983               (insert "<programlisting><![CDATA[")
 984               (setq inquote t)))
 985
 986            ;; Tables: since version 4.3 of DocBook DTD, HTML tables are
 987            ;; supported.  We can use existing HTML table exporter code
 988            ;; here.
 989            ((and org-export-with-tables
 990                  (string-match "^\\([ \t]*\\)\\(|\\|\\+-+\\+\\)" line))
 991             (if (not table-open)
 992                 ;; New table starts
 993                 (setq table-open t
 994                       table-buffer nil
 995                       table-orig-buffer nil))
 996             ;; Accumulate lines
 997             (setq table-buffer (cons line table-buffer)
 998                   table-orig-buffer (cons origline table-orig-buffer))
 999             (when (or (not lines)
1000                       (not (string-match "^\\([ \t]*\\)\\(|\\|\\+-+\\+\\)"
1001                                          (car lines))))
1002               (setq table-open nil
1003                     table-buffer (nreverse table-buffer)
1004                     table-orig-buffer (nreverse table-orig-buffer))
1005               (org-export-docbook-close-para-maybe)
1006               (insert (org-export-docbook-finalize-table
1007                        (org-format-table-html table-buffer table-orig-buffer
1008                                               'no-css)))))
1009
1010            ;; Normal lines
1011            (t
1012             ;; This line either is list item or end a list.
1013             (when (when (get-text-property 0 'list-item line)
1014                       (setq line (org-export-docbook-list-line
1015                           line
1016                           (get-text-property 0 'list-item line)
1017                           (get-text-property 0 'list-struct line)
1018                           (get-text-property 0 'list-prevs line)))))
1019
1020             ;; Empty lines start a new paragraph.  If hand-formatted lists
1021             ;; are not fully interpreted, lines starting with "-", "+", "*"
1022             ;; also start a new paragraph.
1023             (if (and (string-match "^ [-+*]-\\|^[ \t]*$" line)
1024                      (not inverse))
1025                 (org-export-docbook-open-para))
1026
1027             ;; Is this the start of a footnote?
1028             (when org-export-with-footnotes
1029               (when (and (boundp 'footnote-section-tag-regexp)
1030                          (string-match (concat "^" footnote-section-tag-regexp)
1031                                        line))
1032                 ;; ignore this line
1033                 (throw 'nextline nil))
1034               ;; These footnote lines have been read and saved before,
1035               ;; ignore them at this time.
1036               (when (string-match "^[ \t]*\\[\\([0-9]+\\)\\]" line)
1037                 (org-export-docbook-close-para-maybe)
1038                 (throw 'nextline nil)))
1039
1040             ;; FIXME: It might be a good idea to add an option to
1041             ;; support line break processing instruction <?linebreak?>.
1042             ;; Org-mode supports line break "\\" in HTML exporter, and
1043             ;; some DocBook users may also want to force line breaks
1044             ;; even though DocBook only supports that in
1045             ;; <literallayout>.
1046
1047             (insert line "\n")))))
1048
1049       ;; Properly close all local lists and other lists
1050       (when inquote
1051         (insert "]]></programlisting>\n")
1052         (org-export-docbook-open-para))
1053
1054       ;; Close all open sections.
1055       (org-export-docbook-level-start 1 nil)
1056
1057       (unless (plist-get opt-plist :buffer-will-be-killed)
1058         (normal-mode)
1059         (if (eq major-mode (default-value 'major-mode))
1060             (nxml-mode)))
1061
1062       ;; Remove empty paragraphs. Replace them with a newline.
1063       (goto-char (point-min))
1064       (while (re-search-forward
1065               "[ \r\n\t]*\\(<para>\\)[ \r\n\t]*</para>[ \r\n\t]*" nil t)
1066         (when (not (get-text-property (match-beginning 1) 'org-protected))
1067           (replace-match "\n")
1068           (backward-char 1)))
1069       ;; Fill empty sections with <para></para>.  This is to make sure
1070       ;; that the DocBook document generated is valid and well-formed.
1071       (goto-char (point-min))
1072       (while (re-search-forward
1073               "</title>\\([ \r\n\t]*\\)</section>" nil t)
1074         (when (not (get-text-property (match-beginning 0) 'org-protected))
1075           (replace-match "\n<para></para>\n" nil nil nil 1)))
1076       ;; Insert the last closing tag.
1077       (goto-char (point-max))
1078       (unless body-only
1079         (insert "</article>"))
1080       (run-hooks 'org-export-docbook-final-hook)
1081       (or to-buffer (save-buffer))
1082       (goto-char (point-min))
1083       (or (org-export-push-to-kill-ring "DocBook")
1084           (message "Exporting... done"))
1085       (if (eq to-buffer 'string)
1086           (prog1 (buffer-substring (point-min) (point-max))
1087             (kill-buffer (current-buffer)))
1088         (current-buffer)))))
1089
1090 (defun org-export-docbook-open-para ()
1091   "Insert <para>, but first close previous paragraph if any."
1092   (org-export-docbook-close-para-maybe)
1093   (insert "\n<para>")
1094   (setq org-docbook-para-open t))
1095
1096 (defun org-export-docbook-close-para-maybe ()
1097   "Close DocBook paragraph if there is one open."
1098   (when org-docbook-para-open
1099     (insert "</para>\n")
1100     (setq org-docbook-para-open nil)))
1101
1102 (defun org-export-docbook-close-li (&optional type)
1103   "Close list if necessary."
1104   (org-export-docbook-close-para-maybe)
1105   (if (equal type "d")
1106       (insert "</listitem></varlistentry>\n")
1107     (insert "</listitem>\n")))
1108
1109 (defun org-export-docbook-level-start (level title)
1110   "Insert a new level in DocBook export.
1111 When TITLE is nil, just close all open levels."
1112   (org-export-docbook-close-para-maybe)
1113   (let* ((target (and title (org-get-text-property-any 0 'target title)))
1114          (l org-level-max)
1115          section-number)
1116     (while (>= l level)
1117       (if (aref org-levels-open (1- l))
1118           (progn
1119             (insert "</section>\n")
1120             (aset org-levels-open (1- l) nil)))
1121       (setq l (1- l)))
1122     (when title
1123       ;; If title is nil, this means this function is called to close
1124       ;; all levels, so the rest is done only if title is given.
1125       ;;
1126       ;; Format tags: put them into a superscript like format.
1127       (when (string-match (org-re "\\(:[[:alnum:]_@#%:]+:\\)[ \t]*$") title)
1128         (setq title
1129               (replace-match
1130                (if org-export-with-tags
1131                    (save-match-data
1132                      (concat
1133                       "<superscript>"
1134                       (match-string 1 title)
1135                       "</superscript>"))
1136                  "")
1137                t t title)))
1138       (aset org-levels-open (1- level) t)
1139       (setq section-number (org-section-number level))
1140       (insert (format "\n<section xml:id=\"%s%s\">\n<title>%s</title>"
1141                       org-export-docbook-section-id-prefix
1142                       (replace-regexp-in-string "\\." "_" section-number)
1143                       title))
1144       (org-export-docbook-open-para))))
1145
1146 (defun org-docbook-expand (string)
1147   "Prepare STRING for DocBook export.
1148 Applies all active conversions.  If there are links in the
1149 string, don't modify these."
1150   (let* ((re (concat org-bracket-link-regexp "\\|"
1151                      (org-re "[ \t]+\\(:[[:alnum:]_@#%:]+:\\)[ \t]*$")))
1152          m s l res)
1153     (while (setq m (string-match re string))
1154       (setq s (substring string 0 m)
1155             l (match-string 0 string)
1156             string (substring string (match-end 0)))
1157       (push (org-docbook-do-expand s) res)
1158       (push l res))
1159     (push (org-docbook-do-expand string) res)
1160     (apply 'concat (nreverse res))))
1161
1162 (defun org-docbook-do-expand (s)
1163   "Apply all active conversions to translate special ASCII to DocBook."
1164   (setq s (org-html-protect s))
1165   (while (string-match "@&lt;\\([^&]*\\)&gt;" s)
1166     (setq s (replace-match "<\\1>" t nil s)))
1167   (if org-export-with-emphasize
1168       (setq s (org-export-docbook-convert-emphasize s)))
1169   (if org-export-with-special-strings
1170       (setq s (org-export-docbook-convert-special-strings s)))
1171   (if org-export-with-sub-superscripts
1172       (setq s (org-export-docbook-convert-sub-super s)))
1173   (if org-export-with-TeX-macros
1174       (let ((start 0) wd rep)
1175         (while (setq start (string-match "\\\\\\([a-zA-Z]+\\)\\({}\\)?"
1176                                          s start))
1177           (if (get-text-property (match-beginning 0) 'org-protected s)
1178               (setq start (match-end 0))
1179             (setq wd (match-string 1 s))
1180             (if (setq rep (org-entity-get-representation wd 'html))
1181                 (setq s (replace-match rep t t s))
1182               (setq start (+ start (length wd))))))))
1183   s)
1184
1185 (defun org-export-docbook-format-desc (desc)
1186   "Make sure DESC is valid as a description in a link."
1187   (save-match-data
1188     (org-docbook-do-expand desc)))
1189
1190 (defun org-export-docbook-convert-emphasize (string)
1191   "Apply emphasis for DocBook exporting."
1192   (let ((s 0) rpl)
1193     (while (string-match org-emph-re string s)
1194       (if (not (equal
1195                 (substring string (match-beginning 3) (1+ (match-beginning 3)))
1196                 (substring string (match-beginning 4) (1+ (match-beginning 4)))))
1197           (setq s (match-beginning 0)
1198                 rpl
1199                 (concat
1200                  (match-string 1 string)
1201                  (nth 1 (assoc (match-string 3 string)
1202                                org-export-docbook-emphasis-alist))
1203                  (match-string 4 string)
1204                  (nth 2 (assoc (match-string 3 string)
1205                                org-export-docbook-emphasis-alist))
1206                  (match-string 5 string))
1207                 string (replace-match rpl t t string)
1208                 s (+ s (- (length rpl) 2)))
1209         (setq s (1+ s))))
1210     string))
1211
1212 (defun org-docbook-protect (string)
1213   (org-html-protect string))
1214
1215 ;; For now, simply return string as it is.
1216 (defun org-export-docbook-convert-special-strings (string)
1217   "Convert special characters in STRING to DocBook."
1218   string)
1219
1220 (defun org-export-docbook-get-footnotes (lines)
1221   "Given a list of LINES, return a list of alist footnotes."
1222   (let ((list nil) line)
1223     (while (setq line (pop lines))
1224       (if (string-match "^[ \t]*\\[\\([0-9]+\\)\\] \\(.+\\)" line)
1225           (push (cons (match-string 1 line) (match-string 2 line))
1226                 list)))
1227     list))
1228
1229 (defun org-export-docbook-format-image (src)
1230   "Create image element in DocBook."
1231   (save-match-data
1232     (let* ((caption (org-find-text-property-in-string 'org-caption src))
1233            (attr (or (org-find-text-property-in-string 'org-attributes src)
1234                      ""))
1235            (label (org-find-text-property-in-string 'org-label src))
1236            (default-attr org-export-docbook-default-image-attributes)
1237            tmp)
1238       (setq caption (and caption (org-html-do-expand caption)))
1239       (while (setq tmp (pop default-attr))
1240         (if (not (string-match (concat (car tmp) "=") attr))
1241             (setq attr (concat attr " " (car tmp) "=" (cdr tmp)))))
1242       (format "<mediaobject%s>
1243 <imageobject>\n<imagedata fileref=\"%s\" %s/>\n</imageobject>
1244 %s</mediaobject>"
1245               (if label (concat " xml:id=\"" label "\"") "")
1246               src attr
1247               (if caption
1248                   (concat "<caption>\n<para>"
1249                           caption
1250                           "</para>\n</caption>\n")
1251                 "")
1252               ))))
1253
1254 (defun org-export-docbook-preprocess (parameters)
1255   "Extra preprocessing work for DocBook export."
1256   ;; Merge lines starting with "\par" to one line.  Such lines are
1257   ;; regarded as the continuation of a long footnote.
1258   (goto-char (point-min))
1259   (while (re-search-forward "\n\\(\\\\par\\>\\)" nil t)
1260     (if (not (get-text-property (match-beginning 1) 'org-protected))
1261         (replace-match ""))))
1262
1263 (defun org-export-docbook-finalize-table (table)
1264   "Clean up TABLE and turn it into DocBook format.
1265 This function adds a label to the table if it is available, and
1266 also changes TABLE to informaltable if caption does not exist.
1267 TABLE is a string containing the HTML code generated by
1268 `org-format-table-html' for a table in Org-mode buffer."
1269   (let (table-with-label)
1270     ;; Get the label if it exists, and move it into the <table> element.
1271     (setq table-with-label
1272           (if (string-match
1273                "^<table \\(\\(.\\|\n\\)+\\)<a name=\"\\(.+\\)\" id=\".+\"></a>\n\\(\\(.\\|\n\\)+\\)</table>"
1274                table)
1275               (replace-match (concat "<table xml:id=\"" (match-string 3 table) "\" "
1276                                      (match-string 1 table)
1277                                      (match-string 4 table)
1278                                      "</table>")
1279                              nil t table)
1280             table))
1281     ;; Change <table> into <informaltable> if caption does not exist.
1282     (if (string-match
1283          "^<table \\(\\(.\\|\n\\)+\\)<caption></caption>\n\\(\\(.\\|\n\\)+\\)</table>"
1284          table-with-label)
1285         (replace-match (concat "<informaltable "
1286                                (match-string 1 table-with-label)
1287                                (match-string 3 table-with-label)
1288                                "</informaltable>")
1289                        nil t table-with-label)
1290       table-with-label)))
1291
1292 ;; Note: This function is very similar to
1293 ;; org-export-html-convert-sub-super.  They can be merged in the future.
1294 (defun org-export-docbook-convert-sub-super (string)
1295   "Convert sub- and superscripts in STRING for DocBook."
1296   (let (key c (s 0) (requireb (eq org-export-with-sub-superscripts '{})))
1297     (while (string-match org-match-substring-regexp string s)
1298       (cond
1299        ((and requireb (match-end 8)) (setq s (match-end 2)))
1300        ((get-text-property  (match-beginning 2) 'org-protected string)
1301         (setq s (match-end 2)))
1302        (t
1303         (setq s (match-end 1)
1304               key (if (string= (match-string 2 string) "_")
1305                       "subscript"
1306                     "superscript")
1307               c (or (match-string 8 string)
1308                     (match-string 6 string)
1309                     (match-string 5 string))
1310               string (replace-match
1311                       (concat (match-string 1 string)
1312                               "<" key ">" c "</" key ">")
1313                       t t string)))))
1314     (while (string-match "\\\\\\([_^]\\)" string)
1315       (setq string (replace-match (match-string 1 string) t t string)))
1316     string))
1317
1318 (defun org-export-docbook-protect-tags (string)
1319   "Change ``<...>'' in string STRING into ``@<...>''.
1320 This is normally needed when STRING contains DocBook elements
1321 that need to be preserved in later phase of DocBook exporting."
1322   (let ((start 0))
1323     (while (string-match "<\\([^>]*\\)>" string start)
1324       (setq string (replace-match
1325                     "@<\\1>" t nil string)
1326             start (match-end 0)))
1327     string))
1328
1329 (defun org-export-docbook-handle-time-stamps (line)
1330   "Format time stamps in string LINE."
1331   (let (replaced
1332         (kw-markup (org-export-docbook-protect-tags
1333                     org-export-docbook-keywords-markup))
1334         (ts-markup (org-export-docbook-protect-tags
1335                     org-export-docbook-timestamp-markup)))
1336     (while (string-match org-maybe-keyword-time-regexp line)
1337       (setq replaced
1338             (concat replaced
1339                     (substring line 0 (match-beginning 0))
1340                     (if (match-end 1)
1341                         (format kw-markup
1342                                 (match-string 1 line)))
1343                     " "
1344                     (format ts-markup
1345                             (substring (org-translate-time
1346                                         (match-string 3 line)) 1 -1)))
1347             line (substring line (match-end 0))))
1348     (concat replaced line)))
1349
1350 (defun org-export-docbook-list-line (line pos struct prevs)
1351   "Insert list syntax in export buffer. Return LINE, maybe modified.
1352
1353 POS is the item position or line position the line had before
1354 modifications to buffer. STRUCT is the list structure. PREVS is
1355 the alist of previous items."
1356   (let* ((get-type
1357           (function
1358            ;; Translate type of list containing POS to "ordered",
1359            ;; "variable" or "itemized".
1360            (lambda (pos struct prevs)
1361              (let ((type (org-list-get-list-type pos struct prevs)))
1362                (cond
1363                 ((eq 'ordered type) "ordered")
1364                 ((eq 'descriptive type) "variable")
1365                 (t "itemized"))))))
1366          (get-closings
1367           (function
1368            ;; Return list of all items and sublists ending at POS, in
1369            ;; reverse order.
1370            (lambda (pos)
1371              (let (out)
1372                (catch 'exit
1373                  (mapc (lambda (e)
1374                          (let ((end (nth 6 e))
1375                                (item (car e)))
1376                            (cond
1377                             ((= end pos) (push item out))
1378                             ((>= item pos) (throw 'exit nil)))))
1379                        struct))
1380                out)))))
1381     ;; First close any previous item, or list, ending at POS.
1382     (mapc (lambda (e)
1383             (let* ((lastp (= (org-list-get-last-item e struct prevs) e))
1384                    (first-item (org-list-get-list-begin e struct prevs))
1385                    (type (funcall get-type first-item struct prevs)))
1386               ;; Ending for every item
1387               (org-export-docbook-close-para-maybe)
1388               (insert (if (equal type "variable")
1389                           "</listitem></varlistentry>\n"
1390                         "</listitem>\n"))
1391               ;; We're ending last item of the list: end list.
1392               (when lastp
1393                 (insert (format "</%slist>\n" type))
1394                 (org-export-docbook-open-para))))
1395           (funcall get-closings pos))
1396     (cond
1397      ;; At an item: insert appropriate tags in export buffer.
1398      ((assq pos struct)
1399       (string-match (concat "[ \t]*\\(\\S-+[ \t]*\\)"
1400                             "\\(?:\\[@\\(?:start:\\)?\\([0-9]+\\|[a-zA-Z]\\)\\][ \t]*\\)?"
1401                             "\\(?:\\(\\[[ X-]\\]\\)[ \t]+\\)?"
1402                             "\\(?:\\(.*\\)[ \t]+::\\(?:[ \t]+\\|$\\)\\)?"
1403                             "\\(.*\\)")
1404                     line)
1405       (let* ((checkbox (match-string 3 line))
1406              (desc-tag (or (match-string 4 line) "???"))
1407              (body (match-string 5 line))
1408              (list-beg (org-list-get-list-begin pos struct prevs))
1409              (firstp (= list-beg pos))
1410              ;; Always refer to first item to determine list type, in
1411              ;; case list is ill-formed.
1412              (type (funcall get-type list-beg struct prevs))
1413              ;; Special variables for ordered lists.
1414              (counter (let ((count-tmp (org-list-get-counter pos struct)))
1415                         (cond
1416                          ((not count-tmp) nil)
1417                          ((string-match "[A-Za-z]" count-tmp)
1418                           (- (string-to-char (upcase count-tmp)) 64))
1419                          ((string-match "[0-9]+" count-tmp)
1420                           count-tmp)))))
1421         ;; When FIRSTP, a new list or sub-list is starting.
1422         (when firstp
1423           (org-export-docbook-close-para-maybe)
1424           (insert (format "<%slist>\n" type)))
1425         (insert (cond
1426                  ((equal type "variable")
1427                   (format "<varlistentry><term>%s</term><listitem>" desc-tag))
1428                  ((and (equal type "ordered") counter)
1429                   (format "<listitem override=\"%s\">" counter))
1430                  (t "<listitem>")))
1431         ;; For DocBook, we need to open a para right after tag
1432         ;; <listitem>.
1433         (org-export-docbook-open-para)
1434         ;; If line had a checkbox, some additional modification is required.
1435         (when checkbox (setq body (concat checkbox " " body)))
1436         ;; Return modified line
1437         body))
1438      ;; At a list ender:  normal text follows: need <para>.
1439      ((equal "ORG-LIST-END-MARKER" line)
1440       (org-export-docbook-open-para)
1441       (throw 'nextline nil))
1442      ;; Not at an item: return line unchanged (side-effects only).
1443      (t line))))
1444
1445 (provide 'org-docbook)
1446
1447 ;;; org-docbook.el ends here