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1 ;;; ox.el --- Generic Export Engine for Org Mode
3 ;; Copyright (C) 2012, 2013 Free Software Foundation, Inc.
5 ;; Author: Nicolas Goaziou <n.goaziou at gmail dot com>
6 ;; Keywords: outlines, hypermedia, calendar, wp
8 ;; GNU Emacs is free software: you can redistribute it and/or modify
9 ;; it under the terms of the GNU General Public License as published by
10 ;; the Free Software Foundation, either version 3 of the License, or
11 ;; (at your option) any later version.
13 ;; GNU Emacs is distributed in the hope that it will be useful,
14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 ;; GNU General Public License for more details.
18 ;; You should have received a copy of the GNU General Public License
19 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
21 ;;; Commentary:
22 ;;
23 ;; This library implements a generic export engine for Org, built on
24 ;; its syntactical parser: Org Elements.
25 ;;
26 ;; Besides that parser, the generic exporter is made of three distinct
27 ;; parts:
28 ;;
29 ;; - The communication channel consists in a property list, which is
30 ;; created and updated during the process. Its use is to offer
31 ;; every piece of information, would it be about initial environment
32 ;; or contextual data, all in a single place. The exhaustive list
33 ;; of properties is given in "The Communication Channel" section of
34 ;; this file.
35 ;;
36 ;; - The transcoder walks the parse tree, ignores or treat as plain
37 ;; text elements and objects according to export options, and
38 ;; eventually calls back-end specific functions to do the real
39 ;; transcoding, concatenating their return value along the way.
40 ;;
41 ;; - The filter system is activated at the very beginning and the very
42 ;; end of the export process, and each time an element or an object
43 ;; has been converted. It is the entry point to fine-tune standard
44 ;; output from back-end transcoders. See "The Filter System"
45 ;; section for more information.
46 ;;
47 ;; The core function is `org-export-as'. It returns the transcoded
48 ;; buffer as a string.
49 ;;
50 ;; An export back-end is defined with `org-export-define-backend'.
51 ;; This function can also support specific buffer keywords, OPTION
52 ;; keyword's items and filters. Refer to function's documentation for
53 ;; more information.
54 ;;
55 ;; If the new back-end shares most properties with another one,
56 ;; `org-export-define-derived-backend' can be used to simplify the
57 ;; process.
58 ;;
59 ;; Any back-end can define its own variables. Among them, those
60 ;; customizable should belong to the `org-export-BACKEND' group.
61 ;;
62 ;; Tools for common tasks across back-ends are implemented in the
63 ;; following part of the file.
64 ;;
65 ;; Then, a wrapper macro for asynchronous export,
66 ;; `org-export-async-start', along with tools to display results. are
67 ;; given in the penultimate part.
68 ;;
69 ;; Eventually, a dispatcher (`org-export-dispatch') for standard
70 ;; back-ends is provided in the last one.
72 ;;; Code:
91 \f
92 ;;; Internal Variables
93 ;;
94 ;; Among internal variables, the most important is
95 ;; `org-export-options-alist'. This variable define the global export
96 ;; options, shared between every exporter, and how they are acquired.
141 "Alist between export properties and ways to set them.
143 The CAR of the alist is the property name, and the CDR is a list
144 like (KEYWORD OPTION DEFAULT BEHAVIOUR) where:
146 KEYWORD is a string representing a buffer keyword, or nil. Each
147 property defined this way can also be set, during subtree
148 export, through a headline property named after the keyword
150 property).
151 OPTION is a string that could be found in an #+OPTIONS: line.
152 DEFAULT is the default value for the property.
153 BEHAVIOUR determines how Org should handle multiple keywords for
154 the same property. It is a symbol among:
155 nil Keep old value and discard the new one.
156 t Replace old value with the new one.
157 `space' Concatenate the values, separating them with a space.
158 `newline' Concatenate the values, separating them with
159 a newline.
160 `split' Split values at white spaces, and cons them to the
161 previous list.
163 Values set through KEYWORD and OPTION have precedence over
164 DEFAULT.
166 All these properties should be back-end agnostic. Back-end
167 specific properties are set through `org-export-define-backend'.
171 "List of in-buffer keywords that require special treatment.
172 These keywords are not directly associated to a property. The
173 way they are handled must be hard-coded into
233 "Alist between filters properties and initial values.
235 The key of each association is a property name accessible through
236 the communication channel. Its value is a configurable global
237 variable defining initial filters.
239 This list is meant to install user specified filters. Back-end
240 developers may install their own filters using
241 `org-export-define-backend'. Filters defined there will always
242 be prepended to the current list, so they always get applied
251 "Default rule for link matching an inline image.
252 This rule applies to links with no description. By default, it
253 will be considered as an inline image if it targets a local file
256 See `org-export-inline-image-p' for more information about
260 "Non-nil means asynchronous export process should leave data behind.
264 located in `temporary-file-directory'.
266 When non-nil, it will also set `debug-on-error' to a non-nil
270 "Record asynchronously generated export results and processes.
271 This is an alist: its CAR is the source of the
272 result (destination file or buffer for a finished process,
273 original buffer for a running one) and its CDR is a list
274 containing the back-end used, as a symbol, and either a process
275 or the time at which it finished. It is used to build the menu
279 "List of backends currently available in the exporter.
280 This variable is set with `org-export-define-backend' and
284 "Last command called from the dispatcher.
285 The value should be a list. Its CAR is the action, as a symbol,
289 "The position where the last export command was created using the dispatcher.
290 This marker will be used with `C-u C-c C-e' to make sure export repetition
293 ;; For compatibility with Org < 8
295 "Name, if any, of the back-end used during an export process.
297 Its value is a symbol such as `html', `latex', `ascii', or nil if
298 the back-end is anonymous (see `org-export-create-backend') or if
299 there is no export process in progress.
301 It can be used to teach Babel blocks how to act differently
304 \f
305 ;;; User-configurable Variables
306 ;;
307 ;; Configuration for the masses.
308 ;;
309 ;; They should never be accessed directly, as their value is to be
310 ;; stored in a property list (cf. `org-export-options-alist').
311 ;; Back-ends will read their value from there instead.
314 "Options for exporting Org mode files."
319 "General options for export engine."
324 "Whether sub-trees with the ARCHIVE tag should be exported.
326 This can have three different values:
327 nil Do not export, pretend this tree is not present.
328 t Do export the entire tree.
329 `headline' Only export the headline, but skip the tree below it.
331 This option can also be set with the OPTIONS keyword,
340 "Non-nil means insert author name into the exported file.
341 This option can also be set with the OPTIONS keyword,
347 "Non-nil means export CLOCK keywords.
348 This option can also be set with the OPTIONS keyword,
354 "Non-nil means the postamble should contain a creator sentence.
356 The sentence can be set in `org-export-creator-string' and
359 If the value is `comment' insert it as a comment."
367 "Non-nil means insert date in the exported document.
368 This option can also be set with the OPTIONS keyword,
374 "Time-stamp format string to use for DATE keyword.
376 The format string, when specified, only applies if date consists
377 in a single time-stamp. Otherwise its value will be ignored.
379 See `format-time-string' for details on how to build this
380 string."
388 emacs-version
390 "Information about the creator of the document.
391 This option can also be set on with the CREATOR keyword."
396 "Non-nil means export contents of standard drawers.
398 When t, all drawers are exported. This may also be a list of
399 drawer names to export. If that list starts with `not', only
400 drawers with such names will be ignored.
402 This variable doesn't apply to properties drawers.
404 This option can also be set with the OPTIONS keyword,
417 :inline t
421 "Non-nil means insert author email into the exported file.
422 This option can also be set with the OPTIONS keyword,
428 "Non-nil means interpret *word*, /word/, _word_ and +word+.
430 If the export target supports emphasizing text, the word will be
431 typeset in bold, italic, with an underline or strike-through,
432 respectively.
434 This option can also be set with the OPTIONS keyword,
440 "Tags that exclude a tree from export.
442 All trees carrying any of these tags will be excluded from
443 export. This is without condition, so even subtrees inside that
444 carry one of the `org-export-select-tags' will be removed.
446 This option can also be set with the EXCLUDE_TAGS keyword."
453 This can be used to have pre-formatted text, fragments of code
454 etc. For example:
455 : ;; Some Lisp examples
456 : (while (defc cnt)
457 : (ding))
458 will be looking just like this in also HTML. See also the QUOTE
459 keyword. Not all export backends support this.
461 This option can also be set with the OPTIONS keyword,
467 "Non-nil means Org footnotes should be exported.
468 This option can also be set with the OPTIONS keyword,
474 "Non-nil means process LaTeX environments and fragments.
476 This option can also be set with the OPTIONS line,
479 nil Ignore math snippets.
480 `verbatim' Keep everything in verbatim.
481 t Allow export of math snippets."
491 "The last level which is still exported as a headline.
493 Inferior levels will usually produce itemize or enumerate lists
494 when exported, but back-end behaviour may differ.
496 This option can also be set with the OPTIONS keyword,
502 "The default language for export and clocktable translations, as a string.
503 This may have an association in
504 `org-clock-clocktable-language-setup',
505 `org-export-smart-quotes-alist' and `org-export-dictionary'.
506 This option can also be set with the LANGUAGE keyword."
511 "Non-nil means preserve all line breaks when exporting.
512 This option can also be set with the OPTIONS keyword,
518 "Non-nil means interpret entities when exporting.
521 Å.
523 For a list of supported names, see the constant `org-entities'
524 and the user option `org-entities-user'.
526 This option can also be set with the OPTIONS keyword,
532 "Non-nil means inlinetasks should be exported.
533 This option can also be set with the OPTIONS keyword,
541 "Non-nil means include planning info in export.
543 Planning info is the line containing either SCHEDULED:,
544 DEADLINE:, CLOSED: time-stamps, or a combination of them.
546 This option can also be set with the OPTIONS keyword,
554 "Non-nil means include priority cookies in export.
555 This option can also be set with the OPTIONS keyword,
561 "Non-nil means add section numbers to headlines when exporting.
563 When set to an integer n, numbering will only happen for
564 headlines whose relative level is higher or equal to n.
566 This option can also be set with the OPTIONS keyword,
572 "Tags that select a tree for export.
574 If any such tag is found in a buffer, all trees that do not carry
575 one of these tags will be ignored during export. Inside trees
576 that are selected like this, you can still deselect a subtree by
577 tagging it with one of the `org-export-exclude-tags'.
579 This option can also be set with the SELECT_TAGS keyword."
584 "Non-nil means activate smart quotes during export.
585 This option can also be set with the OPTIONS keyword,
588 When setting this to non-nil, you need to take care of
589 using the correct Babel package when exporting to LaTeX.
590 E.g., you can load Babel for french like this:
601 When this option is turned on, these strings will be exported as:
603 Org HTML LaTeX UTF-8
604 -----+----------+--------+-------
606 -- – -- –
607 --- — --- —
610 This option can also be set with the OPTIONS keyword,
616 "Non-nil means include statistics cookies in export.
617 This option can also be set with the OPTIONS keyword,
627 When this option is turned on, you can use TeX-like syntax for
629 will be considered as a single item - so grouping with {} is
630 normally not needed. For example, the following things will be
631 parsed as single sub- or superscripts.
633 10^24 or 10^tau several digits will be considered 1 item.
634 10^-12 or 10^-tau a leading sign with digits or a word
635 x^2-y^3 will be read as x^2 - y^3, because items are
636 terminated by almost any nonword/nondigit char.
637 x_{i^2} or x^(2-i) braces or parenthesis do grouping.
639 Still, ambiguity is possible - so when in doubt use {} to enclose
640 the sub/superscript. If you set this variable to the symbol
641 `{}', the braces are *required* in order to trigger
642 interpretations as sub/superscript. This can be helpful in
645 This option can also be set with the OPTIONS keyword,
654 "Non-nil means create a table of contents in exported files.
656 The TOC contains headlines with levels up
657 to`org-export-headline-levels'. When an integer, include levels
658 up to N in the toc, this may then be different from
659 `org-export-headline-levels', but it will not be allowed to be
660 larger than the number of headline levels. When nil, no table of
661 contents is made.
663 This option can also be set with the OPTIONS keyword,
673 For example:
675 | Name | Address | Birthday |
676 |-------------+----------+-----------|
677 | Arthur Dent | England | 29.2.2100 |
679 This option can also be set with the OPTIONS keyword,
685 "If nil, do not export tags, just remove them from headlines.
687 If this is the symbol `not-in-toc', tags will be removed from
688 table of contents entries, but still be shown in the headlines of
689 the document.
691 This option can also be set with the OPTIONS keyword,
700 "Non-nil means include TODO items for export.
702 This may have the following values:
703 t include tasks independent of state.
704 `todo' include only tasks that are not yet done.
705 `done' include only tasks that are already done.
706 nil ignore all tasks.
707 list of keywords include tasks with these keywords.
709 This option can also be set with the OPTIONS keyword,
721 "Non-nil means insert a time stamp into the exported file.
722 The time stamp shows when the file was created. This option can
728 "Non nil means allow timestamps in export.
730 It can be set to any of the following values:
731 t export all timestamps.
732 `active' export active timestamps only.
733 `inactive' export inactive timestamps only.
734 nil do not export timestamps
736 This only applies to timestamps isolated in a paragraph
737 containing only timestamps. Other timestamps are always
738 exported.
740 This option can also be set with the OPTIONS keyword, e.g.
750 "Non-nil means include TODO keywords in export.
751 When nil, remove all these keywords from the export. This option
757 "Non-nil means BIND keywords can define local variable values.
758 This is a potential security risk, which is why the default value
759 is nil. You can also allow them through local buffer variables."
766 "Alist between export snippets back-ends and exporter back-ends.
768 This variable allows to provide shortcuts for export snippets.
772 HTML code while every other back-end will ignore it."
781 "Coding system for the exported file."
788 "Should we push exported content to the kill ring?"
797 "The initial scope when exporting with `org-export-dispatch'.
798 This variable can be either set to `buffer' or `subtree'."
805 "Non-nil means show buffer after exporting to temp buffer.
806 When Org exports to a file, the buffer visiting that file is ever
807 shown, but remains buried. However, when exporting to
808 a temporary buffer, that buffer is popped up in a second window.
809 When this variable is nil, the buffer remains buried also in
810 these cases."
815 "Non-nil means export and publishing commands will run in background.
816 Results from an asynchronous export are never displayed
824 "File used to initialize external export process.
825 Value must be an absolute file name. It defaults to user's
826 initialization file. Though, a specific configuration makes the
827 process faster and the export more portable."
834 "Non-nil means using a non-intrusive `org-export-dispatch'.
835 In that case, no help buffer is displayed. Though, an indicator
841 asynchronous). Also, \[?] allows to switch back to standard
842 mode."
849 \f
850 ;;; Defining Back-ends
851 ;;
852 ;; An export back-end is a structure with `org-export-backend' type
853 ;; and `name', `parent', `transcoders', `options', `filters', `blocks'
854 ;; and `menu' slots.
855 ;;
856 ;; At the lowest level, a back-end is created with
857 ;; `org-export-create-backend' function.
858 ;;
859 ;; A named back-end can be registered with
860 ;; `org-export-register-backend' function. A registered back-end can
861 ;; later be referred to by its name, with `org-export-get-backend'
862 ;; function. Also, such a back-end can become the parent of a derived
863 ;; back-end from which slot values will be inherited by default.
864 ;; `org-export-derived-backend-p' can check if a given back-end is
865 ;; derived from a list of back-end names.
866 ;;
867 ;; `org-export-get-all-transcoders', `org-export-get-all-options' and
868 ;; `org-export-get-all-filters' return the full alist of transcoders,
869 ;; options and filters, including those inherited from ancestors.
870 ;;
871 ;; At a higher level, `org-export-define-backend' is the standard way
872 ;; to define an export back-end. If the new back-end is similar to
873 ;; a registered back-end, `org-export-define-derived-backend' may be
874 ;; used instead.
875 ;;
876 ;; Eventually `org-export-barf-if-invalid-backend' returns an error
877 ;; when a given back-end hasn't been registered yet.
881 name parent transcoders options filters blocks menu)
884 "Return export back-end named after NAME.
885 NAME is a symbol. Return nil if no such back-end is found."
892 "Register BACKEND as a known export back-end.
893 BACKEND is a structure with `org-export-backend' type."
894 ;; Refuse to register an unnamed back-end.
897 ;; Refuse to register a back-end with an unknown parent.
901 ;; Register dedicated export blocks in the parser.
905 ;; If a back-end with the same name as BACKEND is already
906 ;; registered, replace it with BACKEND. Otherwise, simply add
907 ;; BACKEND to the list of registered back-ends.
913 "Signal an error if BACKEND isn't defined."
918 "Non-nil if BACKEND is derived from one of BACKENDS.
919 BACKEND is an export back-end, as returned by, e.g.,
920 `org-export-create-backend', or a symbol referring to
921 a registered back-end. BACKENDS is constituted of symbols."
933 "Return full translation table for BACKEND.
935 BACKEND is an export back-end, as return by, e.g,,
936 `org-export-create-backend'. Return value is an alist where
937 keys are element or object types, as symbols, and values are
938 transcoders.
940 Unlike to `org-export-backend-transcoders', this function
941 also returns transcoders inherited from parent back-ends,
942 if any."
946 parent)
951 transcoders)))
954 "Return export options for BACKEND.
956 BACKEND is an export back-end, as return by, e.g,,
957 `org-export-create-backend'. See `org-export-options-alist'
958 for the shape of the return value.
960 Unlike to `org-export-backend-options', this function also
961 returns options inherited from parent back-ends, if any."
965 parent)
969 options)))
972 "Return complete list of filters for BACKEND.
974 BACKEND is an export back-end, as return by, e.g,,
975 `org-export-create-backend'. Return value is an alist where
976 keys are symbols and values lists of functions.
978 Unlike to `org-export-backend-filters', this function also
979 returns filters inherited from parent back-ends, if any."
983 parent)
987 filters)))
990 "Define a new back-end BACKEND.
992 TRANSCODERS is an alist between object or element types and
993 functions handling them.
995 These functions should return a string without any trailing
996 space, or nil. They must accept three arguments: the object or
997 element itself, its contents or nil when it isn't recursive and
998 the property list used as a communication channel.
1000 Contents, when not nil, are stripped from any global indentation
1001 \(although the relative one is preserved). They also always end
1002 with a single newline character.
1004 If, for a given type, no function is found, that element or
1005 object type will simply be ignored, along with any blank line or
1006 white space at its end. The same will happen if the function
1007 returns the nil value. If that function returns the empty
1008 string, the type will be ignored, but the blank lines or white
1009 spaces will be kept.
1011 In addition to element and object types, one function can be
1012 associated to the `template' (or `inner-template') symbol and
1013 another one to the `plain-text' symbol.
1015 The former returns the final transcoded string, and can be used
1016 to add a preamble and a postamble to document's body. It must
1017 accept two arguments: the transcoded string and the property list
1018 containing export options. A function associated to `template'
1020 A function associated to `inner-template' is always applied.
1022 The latter, when defined, is to be called on every text not
1023 recognized as an element or an object. It must accept two
1024 arguments: the text string and the information channel. It is an
1025 appropriate place to protect special chars relative to the
1026 back-end.
1028 BODY can start with pre-defined keyword arguments. The following
1029 keywords are understood:
1031 :export-block
1033 String, or list of strings, representing block names that
1034 will not be parsed. This is used to specify blocks that will
1035 contain raw code specific to the back-end. These blocks
1036 still have to be handled by the relative `export-block' type
1037 translator.
1039 :filters-alist
1041 Alist between filters and function, or list of functions,
1042 specific to the back-end. See `org-export-filters-alist' for
1043 a list of all allowed filters. Filters defined here
1044 shouldn't make a back-end test, as it may prevent back-ends
1045 derived from this one to behave properly.
1047 :menu-entry
1049 Menu entry for the export dispatcher. It should be a list
1050 like:
1052 '(KEY DESCRIPTION-OR-ORDINAL ACTION-OR-MENU)
1054 where :
1056 KEY is a free character selecting the back-end.
1058 DESCRIPTION-OR-ORDINAL is either a string or a number.
1060 If it is a string, is will be used to name the back-end in
1061 its menu entry. If it is a number, the following menu will
1062 be displayed as a sub-menu of the back-end with the same
1063 KEY. Also, the number will be used to determine in which
1064 order such sub-menus will appear (lowest first).
1066 ACTION-OR-MENU is either a function or an alist.
1068 If it is an action, it will be called with four
1069 arguments (booleans): ASYNC, SUBTREEP, VISIBLE-ONLY and
1070 BODY-ONLY. See `org-export-as' for further explanations on
1071 some of them.
1073 If it is an alist, associations should follow the
1074 pattern:
1076 '(KEY DESCRIPTION ACTION)
1078 where KEY, DESCRIPTION and ACTION are described above.
1080 Valid values include:
1084 or
1089 \(lambda (a s v b)
1090 \(if a (org-latex-export-to-pdf t s v b)
1091 \(org-open-file
1092 \(org-latex-export-to-pdf nil s v b)))))))
1094 or the following, which will be added to the previous
1095 sub-menu,
1097 '(?l 1
1101 :options-alist
1103 Alist between back-end specific properties introduced in
1104 communication channel and how their value are acquired. See
1105 `org-export-options-alist' for more information about
1106 structure of the values."
1120 :transcoders transcoders
1121 :options options
1122 :filters filters
1123 :blocks blocks
1127 "Create a new back-end as a variant of an existing one.
1129 CHILD is the name of the derived back-end. PARENT is the name of
1130 the parent back-end.
1132 BODY can start with pre-defined keyword arguments. The following
1133 keywords are understood:
1135 :export-block
1137 String, or list of strings, representing block names that
1138 will not be parsed. This is used to specify blocks that will
1139 contain raw code specific to the back-end. These blocks
1140 still have to be handled by the relative `export-block' type
1141 translator.
1143 :filters-alist
1145 Alist of filters that will overwrite or complete filters
1146 defined in PARENT back-end. See `org-export-filters-alist'
1147 for a list of allowed filters.
1149 :menu-entry
1151 Menu entry for the export dispatcher. See
1152 `org-export-define-backend' for more information about the
1153 expected value.
1155 :options-alist
1157 Alist of back-end specific properties that will overwrite or
1158 complete those defined in PARENT back-end. Refer to
1159 `org-export-options-alist' for more information about
1160 structure of the values.
1162 :translate-alist
1164 Alist of element and object types and transcoders that will
1165 overwrite or complete transcode table from PARENT back-end.
1166 Refer to `org-export-define-backend' for detailed information
1167 about transcoders.
1170 as a variant of `latex' back-end with a custom template function:
1172 \(org-export-define-derived-backend 'my-latex 'latex
1173 :translate-alist '((template . my-latex-template-fun)))
1175 The back-end could then be called with, for example:
1192 :parent parent
1193 :transcoders transcoders
1194 :options options
1195 :filters filters
1196 :blocks blocks
1200 \f
1201 ;;; The Communication Channel
1202 ;;
1203 ;; During export process, every function has access to a number of
1204 ;; properties. They are of two types:
1205 ;;
1206 ;; 1. Environment options are collected once at the very beginning of
1207 ;; the process, out of the original buffer and configuration.
1208 ;; Collecting them is handled by `org-export-get-environment'
1209 ;; function.
1210 ;;
1211 ;; Most environment options are defined through the
1212 ;; `org-export-options-alist' variable.
1213 ;;
1214 ;; 2. Tree properties are extracted directly from the parsed tree,
1215 ;; just before export, by `org-export-collect-tree-properties'.
1216 ;;
1217 ;; Here is the full list of properties available during transcode
1218 ;; process, with their category and their value type.
1219 ;;
1220 ;; + `:author' :: Author's name.
1221 ;; - category :: option
1222 ;; - type :: string
1223 ;;
1224 ;; + `:back-end' :: Current back-end used for transcoding.
1225 ;; - category :: tree
1226 ;; - type :: symbol
1227 ;;
1228 ;; + `:creator' :: String to write as creation information.
1229 ;; - category :: option
1230 ;; - type :: string
1231 ;;
1232 ;; + `:date' :: String to use as date.
1233 ;; - category :: option
1234 ;; - type :: string
1235 ;;
1236 ;; + `:description' :: Description text for the current data.
1237 ;; - category :: option
1238 ;; - type :: string
1239 ;;
1240 ;; + `:email' :: Author's email.
1241 ;; - category :: option
1242 ;; - type :: string
1243 ;;
1244 ;; + `:exclude-tags' :: Tags for exclusion of subtrees from export
1245 ;; process.
1246 ;; - category :: option
1247 ;; - type :: list of strings
1248 ;;
1249 ;; + `:export-options' :: List of export options available for current
1250 ;; process.
1251 ;; - category :: none
1252 ;; - type :: list of symbols, among `subtree', `body-only' and
1253 ;; `visible-only'.
1254 ;;
1255 ;; + `:exported-data' :: Hash table used for memoizing
1256 ;; `org-export-data'.
1257 ;; - category :: tree
1258 ;; - type :: hash table
1259 ;;
1260 ;; + `:filetags' :: List of global tags for buffer. Used by
1261 ;; `org-export-get-tags' to get tags with inheritance.
1262 ;; - category :: option
1263 ;; - type :: list of strings
1264 ;;
1265 ;; + `:footnote-definition-alist' :: Alist between footnote labels and
1266 ;; their definition, as parsed data. Only non-inlined footnotes
1267 ;; are represented in this alist. Also, every definition isn't
1268 ;; guaranteed to be referenced in the parse tree. The purpose of
1269 ;; this property is to preserve definitions from oblivion
1270 ;; (i.e. when the parse tree comes from a part of the original
1271 ;; buffer), it isn't meant for direct use in a back-end. To
1272 ;; retrieve a definition relative to a reference, use
1273 ;; `org-export-get-footnote-definition' instead.
1274 ;; - category :: option
1275 ;; - type :: alist (STRING . LIST)
1276 ;;
1277 ;; + `:headline-levels' :: Maximum level being exported as an
1278 ;; headline. Comparison is done with the relative level of
1279 ;; headlines in the parse tree, not necessarily with their
1280 ;; actual level.
1281 ;; - category :: option
1282 ;; - type :: integer
1283 ;;
1284 ;; + `:headline-offset' :: Difference between relative and real level
1285 ;; of headlines in the parse tree. For example, a value of -1
1286 ;; means a level 2 headline should be considered as level
1287 ;; 1 (cf. `org-export-get-relative-level').
1288 ;; - category :: tree
1289 ;; - type :: integer
1290 ;;
1291 ;; + `:headline-numbering' :: Alist between headlines and their
1292 ;; numbering, as a list of numbers
1293 ;; (cf. `org-export-get-headline-number').
1294 ;; - category :: tree
1295 ;; - type :: alist (INTEGER . LIST)
1296 ;;
1297 ;; + `:id-alist' :: Alist between ID strings and destination file's
1298 ;; path, relative to current directory. It is used by
1299 ;; `org-export-resolve-id-link' to resolve ID links targeting an
1300 ;; external file.
1301 ;; - category :: option
1302 ;; - type :: alist (STRING . STRING)
1303 ;;
1304 ;; + `:ignore-list' :: List of elements and objects that should be
1305 ;; ignored during export.
1306 ;; - category :: tree
1307 ;; - type :: list of elements and objects
1308 ;;
1309 ;; + `:input-file' :: Full path to input file, if any.
1310 ;; - category :: option
1311 ;; - type :: string or nil
1312 ;;
1313 ;; + `:keywords' :: List of keywords attached to data.
1314 ;; - category :: option
1315 ;; - type :: string
1316 ;;
1317 ;; + `:language' :: Default language used for translations.
1318 ;; - category :: option
1319 ;; - type :: string
1320 ;;
1321 ;; + `:parse-tree' :: Whole parse tree, available at any time during
1322 ;; transcoding.
1323 ;; - category :: option
1324 ;; - type :: list (as returned by `org-element-parse-buffer')
1325 ;;
1326 ;; + `:preserve-breaks' :: Non-nil means transcoding should preserve
1327 ;; all line breaks.
1328 ;; - category :: option
1329 ;; - type :: symbol (nil, t)
1330 ;;
1331 ;; + `:section-numbers' :: Non-nil means transcoding should add
1332 ;; section numbers to headlines.
1333 ;; - category :: option
1334 ;; - type :: symbol (nil, t)
1335 ;;
1336 ;; + `:select-tags' :: List of tags enforcing inclusion of sub-trees
1337 ;; in transcoding. When such a tag is present, subtrees without
1338 ;; it are de facto excluded from the process. See
1339 ;; `use-select-tags'.
1340 ;; - category :: option
1341 ;; - type :: list of strings
1342 ;;
1343 ;; + `:time-stamp-file' :: Non-nil means transcoding should insert
1344 ;; a time stamp in the output.
1345 ;; - category :: option
1346 ;; - type :: symbol (nil, t)
1347 ;;
1348 ;; + `:translate-alist' :: Alist between element and object types and
1349 ;; transcoding functions relative to the current back-end.
1350 ;; Special keys `inner-template', `template' and `plain-text' are
1351 ;; also possible.
1352 ;; - category :: option
1353 ;; - type :: alist (SYMBOL . FUNCTION)
1354 ;;
1355 ;; + `:with-archived-trees' :: Non-nil when archived subtrees should
1356 ;; also be transcoded. If it is set to the `headline' symbol,
1357 ;; only the archived headline's name is retained.
1358 ;; - category :: option
1359 ;; - type :: symbol (nil, t, `headline')
1360 ;;
1361 ;; + `:with-author' :: Non-nil means author's name should be included
1362 ;; in the output.
1363 ;; - category :: option
1364 ;; - type :: symbol (nil, t)
1365 ;;
1366 ;; + `:with-clocks' :: Non-nil means clock keywords should be exported.
1367 ;; - category :: option
1368 ;; - type :: symbol (nil, t)
1369 ;;
1370 ;; + `:with-creator' :: Non-nil means a creation sentence should be
1371 ;; inserted at the end of the transcoded string. If the value
1372 ;; is `comment', it should be commented.
1373 ;; - category :: option
1374 ;; - type :: symbol (`comment', nil, t)
1375 ;;
1376 ;; + `:with-date' :: Non-nil means output should contain a date.
1377 ;; - category :: option
1378 ;; - type :. symbol (nil, t)
1379 ;;
1380 ;; + `:with-drawers' :: Non-nil means drawers should be exported. If
1381 ;; its value is a list of names, only drawers with such names
1382 ;; will be transcoded. If that list starts with `not', drawer
1383 ;; with these names will be skipped.
1384 ;; - category :: option
1385 ;; - type :: symbol (nil, t) or list of strings
1386 ;;
1387 ;; + `:with-email' :: Non-nil means output should contain author's
1388 ;; email.
1389 ;; - category :: option
1390 ;; - type :: symbol (nil, t)
1391 ;;
1392 ;; + `:with-emphasize' :: Non-nil means emphasized text should be
1393 ;; interpreted.
1394 ;; - category :: option
1395 ;; - type :: symbol (nil, t)
1396 ;;
1397 ;; + `:with-fixed-width' :: Non-nil if transcoder should interpret
1398 ;; strings starting with a colon as a fixed-with (verbatim) area.
1399 ;; - category :: option
1400 ;; - type :: symbol (nil, t)
1401 ;;
1402 ;; + `:with-footnotes' :: Non-nil if transcoder should interpret
1403 ;; footnotes.
1404 ;; - category :: option
1405 ;; - type :: symbol (nil, t)
1406 ;;
1407 ;; + `:with-latex' :: Non-nil means `latex-environment' elements and
1408 ;; `latex-fragment' objects should appear in export output. When
1409 ;; this property is set to `verbatim', they will be left as-is.
1410 ;; - category :: option
1411 ;; - type :: symbol (`verbatim', nil, t)
1412 ;;
1413 ;; + `:with-planning' :: Non-nil means transcoding should include
1414 ;; planning info.
1415 ;; - category :: option
1416 ;; - type :: symbol (nil, t)
1417 ;;
1418 ;; + `:with-priority' :: Non-nil means transcoding should include
1419 ;; priority cookies.
1420 ;; - category :: option
1421 ;; - type :: symbol (nil, t)
1422 ;;
1423 ;; + `:with-smart-quotes' :: Non-nil means activate smart quotes in
1424 ;; plain text.
1425 ;; - category :: option
1426 ;; - type :: symbol (nil, t)
1427 ;;
1428 ;; + `:with-special-strings' :: Non-nil means transcoding should
1429 ;; interpret special strings in plain text.
1430 ;; - category :: option
1431 ;; - type :: symbol (nil, t)
1432 ;;
1433 ;; + `:with-sub-superscript' :: Non-nil means transcoding should
1434 ;; interpret subscript and superscript. With a value of "{}",
1435 ;; only interpret those using curly brackets.
1436 ;; - category :: option
1437 ;; - type :: symbol (nil, {}, t)
1438 ;;
1439 ;; + `:with-tables' :: Non-nil means transcoding should interpret
1440 ;; tables.
1441 ;; - category :: option
1442 ;; - type :: symbol (nil, t)
1443 ;;
1444 ;; + `:with-tags' :: Non-nil means transcoding should keep tags in
1445 ;; headlines. A `not-in-toc' value will remove them from the
1446 ;; table of contents, if any, nonetheless.
1447 ;; - category :: option
1448 ;; - type :: symbol (nil, t, `not-in-toc')
1449 ;;
1450 ;; + `:with-tasks' :: Non-nil means transcoding should include
1451 ;; headlines with a TODO keyword. A `todo' value will only
1452 ;; include headlines with a todo type keyword while a `done'
1453 ;; value will do the contrary. If a list of strings is provided,
1454 ;; only tasks with keywords belonging to that list will be kept.
1455 ;; - category :: option
1456 ;; - type :: symbol (t, todo, done, nil) or list of strings
1457 ;;
1458 ;; + `:with-timestamps' :: Non-nil means transcoding should include
1459 ;; time stamps. Special value `active' (resp. `inactive') ask to
1460 ;; export only active (resp. inactive) timestamps. Otherwise,
1461 ;; completely remove them.
1462 ;; - category :: option
1463 ;; - type :: symbol: (`active', `inactive', t, nil)
1464 ;;
1465 ;; + `:with-toc' :: Non-nil means that a table of contents has to be
1466 ;; added to the output. An integer value limits its depth.
1467 ;; - category :: option
1468 ;; - type :: symbol (nil, t or integer)
1469 ;;
1470 ;; + `:with-todo-keywords' :: Non-nil means transcoding should
1471 ;; include TODO keywords.
1472 ;; - category :: option
1473 ;; - type :: symbol (nil, t)
1476 ;;;; Environment Options
1477 ;;
1478 ;; Environment options encompass all parameters defined outside the
1479 ;; scope of the parsed data. They come from five sources, in
1480 ;; increasing precedence order:
1481 ;;
1482 ;; - Global variables,
1483 ;; - Buffer's attributes,
1484 ;; - Options keyword symbols,
1485 ;; - Buffer keywords,
1486 ;; - Subtree properties.
1487 ;;
1488 ;; The central internal function with regards to environment options
1489 ;; is `org-export-get-environment'. It updates global variables with
1490 ;; "#+BIND:" keywords, then retrieve and prioritize properties from
1491 ;; the different sources.
1492 ;;
1493 ;; The internal functions doing the retrieval are:
1494 ;; `org-export--get-global-options',
1495 ;; `org-export--get-buffer-attributes',
1496 ;; `org-export--parse-option-keyword',
1497 ;; `org-export--get-subtree-options' and
1498 ;; `org-export--get-inbuffer-options'
1499 ;;
1500 ;; Also, `org-export--list-bound-variables' collects bound variables
1501 ;; along with their value in order to set them as buffer local
1502 ;; variables later in the process.
1505 "Collect export options from the current buffer.
1507 Optional argument BACKEND is an export back-end, as returned by
1508 `org-export-create-backend'.
1510 When optional argument SUBTREEP is non-nil, assume the export is
1511 done against the current sub-tree.
1513 Third optional argument EXT-PLIST is a property list with
1514 external parameters overriding Org default settings, but still
1515 inferior to file-local settings."
1516 ;; First install #+BIND variables since these must be set before
1517 ;; global options are read.
1520 ;; Get and prioritize export options...
1522 ;; ... from global variables...
1524 ;; ... from an external property list...
1525 ext-plist
1526 ;; ... from in-buffer settings...
1528 ;; ... and from subtree, when appropriate.
1530 ;; Eventually add misc. properties.
1532 :back-end
1533 backend
1535 :footnote-definition-alist
1536 ;; Footnotes definitions must be collected in the original
1537 ;; buffer, as there's no insurance that they will still be in
1538 ;; the parse tree, due to possible narrowing.
1552 alist))))
1553 alist))
1554 :id-alist
1555 ;; Collect id references.
1566 alist))))
1569 "Parse an OPTIONS line and return values as a plist.
1570 Optional argument BACKEND is an export back-end, as returned by,
1571 e.g., `org-export-create-backend'. It specifies which back-end
1572 specific items to read, if any."
1574 ;; Priority is given to back-end specific options.
1576 org-export-options-alist))
1577 plist)
1586 options))
1588 property
1591 plist))
1594 "Get export options in subtree at point.
1595 Optional argument BACKEND is an export back-end, as returned by,
1596 e.g., `org-export-create-backend'. It specifies back-end used
1597 for export. Return options as a plist."
1598 ;; For each buffer keyword, create a headline property setting the
1599 ;; same property in communication channel. The name for the property
1600 ;; is the keyword with "EXPORT_" appended to it.
1603 ;; Make sure point is at a heading.
1605 ;; Take care of EXPORT_TITLE. If it isn't defined, use headline's
1606 ;; title as its fallback value.
1612 plist :title
1615 ;; EXPORT_OPTIONS are parsed in a non-standard way.
1619 ;; Handle other keywords. TITLE keyword is excluded as it has
1620 ;; been handled already.
1628 ;; Export properties are not case-sensitive.
1635 plist
1636 property
1638 ;; Parse VALUE if required.
1642 ;; If BEHAVIOUR is `split' expected value is
1643 ;; a list of strings, not a string.
1646 ;; Look for both general keywords and back-end specific
1647 ;; options, with priority given to the latter.
1649 org-export-options-alist)))
1650 ;; Return value.
1651 plist)))
1654 "Return current buffer export options, as a plist.
1656 Optional argument BACKEND, when non-nil, is an export back-end,
1657 as returned by, e.g., `org-export-create-backend'. It specifies
1658 which back-end specific options should also be read in the
1659 process.
1661 Assume buffer is in Org mode. Narrowing, if any, is ignored."
1663 get-options ; For byte-compiler.
1666 ;; Priority is given to back-end specific options.
1668 org-export-options-alist))
1671 org-export-special-keywords))))
1674 ;; Return all properties associated to KEYWORD.
1681 ;; Recursively read keywords in buffer. FILES is a list
1682 ;; of files read so far. PLIST is the current property
1683 ;; list obtained.
1692 ;; Options in `org-export-special-keywords'.
1696 ;; Avoid circular dependencies.
1706 plist
1711 plist
1717 ;; Options in `org-export-options-alist'.
1722 plist property
1723 ;; Handle value depending on specified
1724 ;; BEHAVIOUR.
1730 " "
1743 ;; Return final value.
1744 plist))))
1745 ;; Read options in the current buffer.
1748 ;; Parse keywords specified in `org-element-document-properties'
1749 ;; and return PLIST.
1760 "Return properties related to buffer attributes, as a plist."
1761 ;; Store full path of input file name, or nil. For internal use.
1769 "Return global export options as a plist.
1770 Optional argument BACKEND, if non-nil, is an export back-end, as
1771 returned by, e.g., `org-export-create-backend'. It specifies
1772 which back-end specific export options should also be read in the
1773 process."
1775 ;; Priority is given to back-end specific options.
1777 org-export-options-alist)))
1784 plist
1785 prop
1786 ;; Eval default value provided. If keyword is
1787 ;; a member of `org-element-document-properties',
1788 ;; parse it as a secondary string before storing it.
1795 value)))))))))))
1798 "Return variables bound from BIND keywords in current buffer.
1799 Also look for BIND keywords in setup files. The return value is
1800 an alist where associations are (VARIABLE-NAME VALUE)."
1805 ;; Return an alist between variable names and their
1806 ;; value. FILES is a list of setup files names read so
1807 ;; far, used to avoid circular dependencies. ALIST is
1808 ;; the alist collected so far.
1819 ;; Enter setup file.
1829 alist))))))))))
1830 alist)))))
1831 ;; Return value in appropriate order of appearance.
1835 ;;;; Tree Properties
1836 ;;
1837 ;; Tree properties are information extracted from parse tree. They
1838 ;; are initialized at the beginning of the transcoding process by
1839 ;; `org-export-collect-tree-properties'.
1840 ;;
1841 ;; Dedicated functions focus on computing the value of specific tree
1842 ;; properties during initialization. Thus,
1843 ;; `org-export--populate-ignore-list' lists elements and objects that
1844 ;; should be skipped during export, `org-export--get-min-level' gets
1845 ;; the minimal exportable level, used as a basis to compute relative
1846 ;; level for headlines. Eventually
1847 ;; `org-export--collect-headline-numbering' builds an alist between
1848 ;; headlines and their numbering.
1851 "Extract tree properties from parse tree.
1853 DATA is the parse tree from which information is retrieved. INFO
1854 is a list holding export options.
1856 Following tree properties are set or updated:
1858 `:exported-data' Hash table used to memoize results from
1859 `org-export-data'.
1861 `:footnote-definition-alist' List of footnotes definitions in
1862 original buffer and current parse tree.
1864 `:headline-offset' Offset between true level of headlines and
1865 local level. An offset of -1 means a headline
1866 of level 2 should be considered as a level
1867 1 headline in the context.
1869 `:headline-numbering' Alist of all headlines as key an the
1870 associated numbering as value.
1872 `:ignore-list' List of elements that should be ignored during
1873 export.
1875 Return updated plist."
1876 ;; Install the parse tree in the communication channel, in order to
1877 ;; use `org-export-get-genealogy' and al.
1879 ;; Get the list of elements and objects to ignore, and put it into
1880 ;; `:ignore-list'. Do not overwrite any user ignore that might have
1881 ;; been done during parse tree filtering.
1884 :ignore-list
1887 ;; Compute `:headline-offset' in order to be able to use
1888 ;; `org-export-get-relative-level'.
1891 :headline-offset
1893 ;; Update footnotes definitions list with definitions in parse tree.
1894 ;; This is required since buffer expansion might have modified
1895 ;; boundaries of footnote definitions contained in the parse tree.
1896 ;; This way, definitions in `footnote-definition-alist' are bound to
1897 ;; match those in the parse tree.
1903 defs)))
1905 ;; Properties order doesn't matter: get the rest of the tree
1906 ;; properties.
1910 info))
1913 "Return minimum exportable headline's level in DATA.
1914 DATA is parsed tree as returned by `org-element-parse-buffer'.
1915 OPTIONS is a plist holding export options."
1926 ;; If no headline was found, for the sake of consistency, set
1927 ;; minimum level to 1 nonetheless.
1931 "Return numbering of all exportable headlines in a parse tree.
1933 DATA is the parse tree. OPTIONS is the plist holding export
1934 options.
1936 Return an alist whose key is a headline and value is its
1937 associated numbering \(in the shape of a list of numbers\) or nil
1938 for a footnotes section."
1946 headline
1948 for idx from 0 to org-export-max-depth
1952 options)))
1955 "Return list of elements and objects to ignore during export.
1956 DATA is the parse tree to traverse. OPTIONS is the plist holding
1957 export options."
1959 walk-data
1960 ;; First find trees containing a select tag, if any.
1964 ;; Collect ignored elements or objects into IGNORE-LIST.
1970 ;; If headline is archived but tree below has
1971 ;; to be skipped, add it to ignore list.
1974 ;; Move into secondary string, if any.
1979 ;; Move into recursive objects/elements.
1981 ;; Main call.
1983 ;; Return value.
1984 ignore))
1987 "Return list of headlines and inlinetasks with a select tag in their tree.
1988 DATA is parsed data as returned by `org-element-parse-buffer'.
1989 INFO is a plist holding export options."
1991 walk-data ; For byte-compiler.
2001 ;; When a select tag is found, mark full
2002 ;; genealogy and every headline within the tree
2003 ;; as acceptable.
2006 genealogy
2009 selected-trees))
2010 ;; If at a headline, continue searching in tree,
2011 ;; recursively.
2021 selected-trees))
2024 "Non-nil when element or object BLOB should be skipped during export.
2025 OPTIONS is the plist holding export options. SELECTED, when
2026 non-nil, is a list of headlines or inlinetasks belonging to
2027 a tree with a select tag."
2034 ;; If `:with-drawers' value starts with `not', ignore
2035 ;; every drawer whose name belong to that list.
2036 ;; Otherwise, ignore drawers whose name isn't in that
2037 ;; list.
2053 ;; Ignore subtrees with an exclude tag.
2056 ;; When a select tag is present in the buffer, ignore any tree
2057 ;; without it.
2059 ;; Ignore commented sub-trees.
2061 ;; Ignore archived subtrees if `:with-archived-trees' is nil.
2063 ;; Ignore tasks, if specified by `:with-tasks' property.
2078 ;; `:with-timestamps' only applies to isolated timestamps
2079 ;; objects, i.e. timestamp objects in a paragraph containing only
2080 ;; timestamps and whitespaces.
2088 options t))))
2097 \f
2098 ;;; The Transcoder
2099 ;;
2100 ;; `org-export-data' reads a parse tree (obtained with, i.e.
2101 ;; `org-element-parse-buffer') and transcodes it into a specified
2102 ;; back-end output. It takes care of filtering out elements or
2103 ;; objects according to export options and organizing the output blank
2104 ;; lines and white space are preserved. The function memoizes its
2105 ;; results, so it is cheap to call it within transcoders.
2106 ;;
2107 ;; It is possible to modify locally the back-end used by
2108 ;; `org-export-data' or even use a temporary back-end by using
2109 ;; `org-export-data-with-backend'.
2110 ;;
2111 ;; Internally, three functions handle the filtering of objects and
2112 ;; elements during the export. In particular,
2113 ;; `org-export-ignore-element' marks an element or object so future
2114 ;; parse tree traversals skip it, `org-export--interpret-p' tells which
2115 ;; elements or objects should be seen as real Org syntax and
2116 ;; `org-export-expand' transforms the others back into their original
2117 ;; shape
2118 ;;
2119 ;; `org-export-transcoder' is an accessor returning appropriate
2120 ;; translator function for a given element or object.
2123 "Return appropriate transcoder for BLOB.
2124 INFO is a plist containing export directives."
2126 ;; Return contents only for complete parse trees.
2132 "Convert DATA into current back-end format.
2134 DATA is a parse tree, an element or an object or a secondary
2135 string. INFO is a plist holding export options.
2137 Return transcoded string."
2143 ;; Ignored element/object.
2145 ;; Plain text.
2151 info))
2152 ;; Uninterpreted element/object: change it back to Org
2153 ;; syntax and export again resulting raw string.
2157 data
2161 info))
2162 ;; Secondary string.
2165 ;; Element/Object without contents or, as a special case,
2166 ;; headline with archive tag and archived trees restricted
2167 ;; to title only.
2175 ;; Export snippets never return a nil value so
2176 ;; that white spaces following them are never
2177 ;; ignored.
2179 ;; Element/Object with contents.
2192 ;; Elements directly containing objects
2193 ;; must have their indentation normalized
2194 ;; first.
2196 data
2197 ;; When normalizing contents of the first
2198 ;; paragraph in an item or a footnote
2199 ;; definition, ignore first line's
2200 ;; indentation: there is none and it
2201 ;; might be misleading.
2206 data)
2213 info))))))))
2214 ;; Final result will be memoized before being returned.
2216 data
2220 ;; Append the same white space between elements or objects as in
2221 ;; the original buffer, and call appropriate filters.
2232 info)))
2233 results)))
2237 "Convert DATA into BACKEND format.
2239 DATA is an element, an object, a secondary string or a string.
2240 BACKEND is a symbol. INFO is a plist used as a communication
2241 channel.
2243 Unlike to `org-export-with-backend', this function will
2244 recursively convert DATA using BACKEND translation table."
2247 data
2248 ;; Set-up a new communication channel with translations defined in
2249 ;; BACKEND as the translate table and a new hash table for
2250 ;; memoization.
2252 info
2254 ;; Size of the hash table is reduced since this function
2255 ;; will probably be used on short trees.
2259 "Non-nil if element or object BLOB should be interpreted during export.
2260 If nil, BLOB will appear as raw Org syntax. Check is done
2261 according to export options INFO, stored as a plist."
2263 ;; ... entities...
2265 ;; ... emphasis...
2268 ;; ... fixed-width areas.
2270 ;; ... LaTeX environments and fragments...
2274 ;; ... sub/superscripts...
2280 ;; ... tables...
2285 "Expand a parsed element or object to its original state.
2287 BLOB is either an element or an object. CONTENTS is its
2288 contents, as a string or nil.
2290 When optional argument WITH-AFFILIATED is non-nil, add affiliated
2291 keywords before output."
2296 blob contents))))
2299 "Add ELEMENT to `:ignore-list' in INFO.
2301 Any element in `:ignore-list' will be skipped when using
2302 `org-element-map'. INFO is modified by side effects."
2306 \f
2307 ;;; The Filter System
2308 ;;
2309 ;; Filters allow end-users to tweak easily the transcoded output.
2310 ;; They are the functional counterpart of hooks, as every filter in
2311 ;; a set is applied to the return value of the previous one.
2312 ;;
2313 ;; Every set is back-end agnostic. Although, a filter is always
2314 ;; called, in addition to the string it applies to, with the back-end
2315 ;; used as argument, so it's easy for the end-user to add back-end
2316 ;; specific filters in the set. The communication channel, as
2317 ;; a plist, is required as the third argument.
2318 ;;
2319 ;; From the developer side, filters sets can be installed in the
2320 ;; process with the help of `org-export-define-backend', which
2321 ;; internally stores filters as an alist. Each association has a key
2322 ;; among the following symbols and a function or a list of functions
2323 ;; as value.
2324 ;;
2325 ;; - `:filter-options' applies to the property list containing export
2326 ;; options. Unlike to other filters, functions in this list accept
2327 ;; two arguments instead of three: the property list containing
2328 ;; export options and the back-end. Users can set its value through
2329 ;; `org-export-filter-options-functions' variable.
2330 ;;
2331 ;; - `:filter-parse-tree' applies directly to the complete parsed
2332 ;; tree. Users can set it through
2333 ;; `org-export-filter-parse-tree-functions' variable.
2334 ;;
2335 ;; - `:filter-final-output' applies to the final transcoded string.
2336 ;; Users can set it with `org-export-filter-final-output-functions'
2337 ;; variable
2338 ;;
2339 ;; - `:filter-plain-text' applies to any string not recognized as Org
2340 ;; syntax. `org-export-filter-plain-text-functions' allows users to
2341 ;; configure it.
2342 ;;
2343 ;; - `:filter-TYPE' applies on the string returned after an element or
2344 ;; object of type TYPE has been transcoded. A user can modify
2345 ;; `org-export-filter-TYPE-functions'
2346 ;;
2347 ;; All filters sets are applied with
2348 ;; `org-export-filter-apply-functions' function. Filters in a set are
2349 ;; applied in a LIFO fashion. It allows developers to be sure that
2350 ;; their filters will be applied first.
2351 ;;
2352 ;; Filters properties are installed in communication channel with
2353 ;; `org-export-install-filters' function.
2354 ;;
2355 ;; Eventually, two hooks (`org-export-before-processing-hook' and
2356 ;; `org-export-before-parsing-hook') are run at the beginning of the
2357 ;; export process and just before parsing to allow for heavy structure
2358 ;; modifications.
2361 ;;;; Hooks
2364 "Hook run at the beginning of the export process.
2366 This is run before include keywords and macros are expanded and
2367 Babel code blocks executed, on a copy of the original buffer
2368 being exported. Visibility and narrowing are preserved. Point
2369 is at the beginning of the buffer.
2371 Every function in this hook will be called with one argument: the
2375 "Hook run before parsing an export buffer.
2377 This is run after include keywords and macros have been expanded
2378 and Babel code blocks executed, on a copy of the original buffer
2379 being exported. Visibility and narrowing are preserved. Point
2380 is at the beginning of the buffer.
2382 Every function in this hook will be called with one argument: the
2386 ;;;; Special Filters
2389 "List of functions applied to the export options.
2390 Each filter is called with two arguments: the export options, as
2391 a plist, and the back-end, as a symbol. It must return
2395 "List of functions applied to the parsed tree.
2396 Each filter is called with three arguments: the parse tree, as
2397 returned by `org-element-parse-buffer', the back-end, as
2398 a symbol, and the communication channel, as a plist. It must
2402 "List of functions applied to plain text.
2403 Each filter is called with three arguments: a string which
2404 contains no Org syntax, the back-end, as a symbol, and the
2405 communication channel, as a plist. It must return a string or
2409 "List of functions applied to the transcoded string.
2410 Each filter is called with three arguments: the full transcoded
2411 string, the back-end, as a symbol, and the communication channel,
2412 as a plist. It must return a string that will be used as the
2416 ;;;; Elements Filters
2419 "List of functions applied to a transcoded babel-call.
2420 Each filter is called with three arguments: the transcoded data,
2421 as a string, the back-end, as a symbol, and the communication
2425 "List of functions applied to a transcoded center block.
2426 Each filter is called with three arguments: the transcoded data,
2427 as a string, the back-end, as a symbol, and the communication
2431 "List of functions applied to a transcoded clock.
2432 Each filter is called with three arguments: the transcoded data,
2433 as a string, the back-end, as a symbol, and the communication
2437 "List of functions applied to a transcoded comment.
2438 Each filter is called with three arguments: the transcoded data,
2439 as a string, the back-end, as a symbol, and the communication
2443 "List of functions applied to a transcoded comment-block.
2444 Each filter is called with three arguments: the transcoded data,
2445 as a string, the back-end, as a symbol, and the communication
2449 "List of functions applied to a transcoded diary-sexp.
2450 Each filter is called with three arguments: the transcoded data,
2451 as a string, the back-end, as a symbol, and the communication
2455 "List of functions applied to a transcoded drawer.
2456 Each filter is called with three arguments: the transcoded data,
2457 as a string, the back-end, as a symbol, and the communication
2461 "List of functions applied to a transcoded dynamic-block.
2462 Each filter is called with three arguments: the transcoded data,
2463 as a string, the back-end, as a symbol, and the communication
2467 "List of functions applied to a transcoded example-block.
2468 Each filter is called with three arguments: the transcoded data,
2469 as a string, the back-end, as a symbol, and the communication
2473 "List of functions applied to a transcoded export-block.
2474 Each filter is called with three arguments: the transcoded data,
2475 as a string, the back-end, as a symbol, and the communication
2479 "List of functions applied to a transcoded fixed-width.
2480 Each filter is called with three arguments: the transcoded data,
2481 as a string, the back-end, as a symbol, and the communication
2485 "List of functions applied to a transcoded footnote-definition.
2486 Each filter is called with three arguments: the transcoded data,
2487 as a string, the back-end, as a symbol, and the communication
2491 "List of functions applied to a transcoded headline.
2492 Each filter is called with three arguments: the transcoded data,
2493 as a string, the back-end, as a symbol, and the communication
2497 "List of functions applied to a transcoded horizontal-rule.
2498 Each filter is called with three arguments: the transcoded data,
2499 as a string, the back-end, as a symbol, and the communication
2503 "List of functions applied to a transcoded inlinetask.
2504 Each filter is called with three arguments: the transcoded data,
2505 as a string, the back-end, as a symbol, and the communication
2509 "List of functions applied to a transcoded item.
2510 Each filter is called with three arguments: the transcoded data,
2511 as a string, the back-end, as a symbol, and the communication
2515 "List of functions applied to a transcoded keyword.
2516 Each filter is called with three arguments: the transcoded data,
2517 as a string, the back-end, as a symbol, and the communication
2521 "List of functions applied to a transcoded latex-environment.
2522 Each filter is called with three arguments: the transcoded data,
2523 as a string, the back-end, as a symbol, and the communication
2527 "List of functions applied to a transcoded node-property.
2528 Each filter is called with three arguments: the transcoded data,
2529 as a string, the back-end, as a symbol, and the communication
2533 "List of functions applied to a transcoded paragraph.
2534 Each filter is called with three arguments: the transcoded data,
2535 as a string, the back-end, as a symbol, and the communication
2539 "List of functions applied to a transcoded plain-list.
2540 Each filter is called with three arguments: the transcoded data,
2541 as a string, the back-end, as a symbol, and the communication
2545 "List of functions applied to a transcoded planning.
2546 Each filter is called with three arguments: the transcoded data,
2547 as a string, the back-end, as a symbol, and the communication
2551 "List of functions applied to a transcoded property-drawer.
2552 Each filter is called with three arguments: the transcoded data,
2553 as a string, the back-end, as a symbol, and the communication
2557 "List of functions applied to a transcoded quote block.
2558 Each filter is called with three arguments: the transcoded quote
2559 data, as a string, the back-end, as a symbol, and the
2560 communication channel, as a plist. It must return a string or
2564 "List of functions applied to a transcoded quote-section.
2565 Each filter is called with three arguments: the transcoded data,
2566 as a string, the back-end, as a symbol, and the communication
2570 "List of functions applied to a transcoded section.
2571 Each filter is called with three arguments: the transcoded data,
2572 as a string, the back-end, as a symbol, and the communication
2576 "List of functions applied to a transcoded special block.
2577 Each filter is called with three arguments: the transcoded data,
2578 as a string, the back-end, as a symbol, and the communication
2582 "List of functions applied to a transcoded src-block.
2583 Each filter is called with three arguments: the transcoded data,
2584 as a string, the back-end, as a symbol, and the communication
2588 "List of functions applied to a transcoded table.
2589 Each filter is called with three arguments: the transcoded data,
2590 as a string, the back-end, as a symbol, and the communication
2594 "List of functions applied to a transcoded table-cell.
2595 Each filter is called with three arguments: the transcoded data,
2596 as a string, the back-end, as a symbol, and the communication
2600 "List of functions applied to a transcoded table-row.
2601 Each filter is called with three arguments: the transcoded data,
2602 as a string, the back-end, as a symbol, and the communication
2606 "List of functions applied to a transcoded verse block.
2607 Each filter is called with three arguments: the transcoded data,
2608 as a string, the back-end, as a symbol, and the communication
2612 ;;;; Objects Filters
2615 "List of functions applied to transcoded bold text.
2616 Each filter is called with three arguments: the transcoded data,
2617 as a string, the back-end, as a symbol, and the communication
2621 "List of functions applied to transcoded code text.
2622 Each filter is called with three arguments: the transcoded data,
2623 as a string, the back-end, as a symbol, and the communication
2627 "List of functions applied to a transcoded entity.
2628 Each filter is called with three arguments: the transcoded data,
2629 as a string, the back-end, as a symbol, and the communication
2633 "List of functions applied to a transcoded export-snippet.
2634 Each filter is called with three arguments: the transcoded data,
2635 as a string, the back-end, as a symbol, and the communication
2639 "List of functions applied to a transcoded footnote-reference.
2640 Each filter is called with three arguments: the transcoded data,
2641 as a string, the back-end, as a symbol, and the communication
2645 "List of functions applied to a transcoded inline-babel-call.
2646 Each filter is called with three arguments: the transcoded data,
2647 as a string, the back-end, as a symbol, and the communication
2651 "List of functions applied to a transcoded inline-src-block.
2652 Each filter is called with three arguments: the transcoded data,
2653 as a string, the back-end, as a symbol, and the communication
2657 "List of functions applied to transcoded italic text.
2658 Each filter is called with three arguments: the transcoded data,
2659 as a string, the back-end, as a symbol, and the communication
2663 "List of functions applied to a transcoded latex-fragment.
2664 Each filter is called with three arguments: the transcoded data,
2665 as a string, the back-end, as a symbol, and the communication
2669 "List of functions applied to a transcoded line-break.
2670 Each filter is called with three arguments: the transcoded data,
2671 as a string, the back-end, as a symbol, and the communication
2675 "List of functions applied to a transcoded link.
2676 Each filter is called with three arguments: the transcoded data,
2677 as a string, the back-end, as a symbol, and the communication
2681 "List of functions applied to a transcoded radio-target.
2682 Each filter is called with three arguments: the transcoded data,
2683 as a string, the back-end, as a symbol, and the communication
2687 "List of functions applied to a transcoded statistics-cookie.
2688 Each filter is called with three arguments: the transcoded data,
2689 as a string, the back-end, as a symbol, and the communication
2693 "List of functions applied to transcoded strike-through text.
2694 Each filter is called with three arguments: the transcoded data,
2695 as a string, the back-end, as a symbol, and the communication
2699 "List of functions applied to a transcoded subscript.
2700 Each filter is called with three arguments: the transcoded data,
2701 as a string, the back-end, as a symbol, and the communication
2705 "List of functions applied to a transcoded superscript.
2706 Each filter is called with three arguments: the transcoded data,
2707 as a string, the back-end, as a symbol, and the communication
2711 "List of functions applied to a transcoded target.
2712 Each filter is called with three arguments: the transcoded data,
2713 as a string, the back-end, as a symbol, and the communication
2717 "List of functions applied to a transcoded timestamp.
2718 Each filter is called with three arguments: the transcoded data,
2719 as a string, the back-end, as a symbol, and the communication
2723 "List of functions applied to transcoded underline text.
2724 Each filter is called with three arguments: the transcoded data,
2725 as a string, the back-end, as a symbol, and the communication
2729 "List of functions applied to transcoded verbatim text.
2730 Each filter is called with three arguments: the transcoded data,
2731 as a string, the back-end, as a symbol, and the communication
2735 ;;;; Filters Tools
2736 ;;
2737 ;; Internal function `org-export-install-filters' installs filters
2738 ;; hard-coded in back-ends (developer filters) and filters from global
2739 ;; variables (user filters) in the communication channel.
2740 ;;
2741 ;; Internal function `org-export-filter-apply-functions' takes care
2742 ;; about applying each filter in order to a given data. It ignores
2743 ;; filters returning a nil value but stops whenever a filter returns
2744 ;; an empty string.
2747 "Call every function in FILTERS.
2749 Functions are called with arguments VALUE, current export
2750 back-end's name and INFO. A function returning a nil value will
2751 be skipped. If it returns the empty string, the process ends and
2752 VALUE is ignored.
2754 Call is done in a LIFO fashion, to be sure that developer
2755 specified filters, if any, are called first."
2765 "Install filters properties in communication channel.
2766 INFO is a plist containing the current communication channel.
2767 Return the updated communication channel."
2769 ;; Install user-defined filters with `org-export-filters-alist'
2770 ;; and filters already in INFO (through ext-plist mechanism).
2777 ;; Filters in INFO will be called
2778 ;; before those user provided.
2781 default-value)))))
2782 org-export-filters-alist)
2783 ;; Prepend back-end specific filters to that list.
2785 ;; Single values get consed, lists are appended.
2790 plist key
2794 ;; Return new communication channel.
2798 \f
2799 ;;; Core functions
2800 ;;
2801 ;; This is the room for the main function, `org-export-as', along with
2802 ;; its derivative, `org-export-string-as'.
2803 ;; `org-export--copy-to-kill-ring-p' determines if output of these
2804 ;; function should be added to kill ring.
2805 ;;
2806 ;; Note that `org-export-as' doesn't really parse the current buffer,
2807 ;; but a copy of it (with the same buffer-local variables and
2808 ;; visibility), where macros and include keywords are expanded and
2809 ;; Babel blocks are executed, if appropriate.
2810 ;; `org-export-with-buffer-copy' macro prepares that copy.
2811 ;;
2812 ;; File inclusion is taken care of by
2813 ;; `org-export-expand-include-keyword' and
2814 ;; `org-export--prepare-file-contents'. Structure wise, including
2815 ;; a whole Org file in a buffer often makes little sense. For
2816 ;; example, if the file contains a headline and the include keyword
2817 ;; was within an item, the item should contain the headline. That's
2818 ;; why file inclusion should be done before any structure can be
2819 ;; associated to the file, that is before parsing.
2820 ;;
2821 ;; `org-export-insert-default-template' is a command to insert
2822 ;; a default template (or a back-end specific template) at point or in
2823 ;; current subtree.
2826 "Return a copy of the current buffer.
2827 The copy preserves Org buffer-local variables, visibility and
2828 narrowing."
2834 new-buf))
2837 "Apply BODY in a copy of the current buffer.
2838 The copy preserves local variables, visibility and contents of
2839 the original buffer. Point is at the beginning of the buffer
2840 when BODY is applied."
2849 ;; Kill copy without confirmation.
2855 "Generate a function duplicating BUFFER.
2857 The copy will preserve local variables, visibility, contents and
2858 narrowing of the original buffer. If a region was active in
2859 BUFFER, contents will be narrowed to that region instead.
2861 The resulting function can be evaled at a later time, from
2862 another buffer, effectively cloning the original buffer there.
2864 The function assumes BUFFER's major mode is `org-mode'."
2868 ;; Set major mode. Ignore `org-mode-hook' as it has been run
2869 ;; already in BUFFER.
2871 ;; Copy specific buffer local variables and variables set
2872 ;; through BIND keywords.
2874 vars)
2882 buffer-file-name
2883 buffer-file-coding-system))
2887 ;; Skip unreadable values, as they cannot be
2888 ;; sent to external process.
2892 vars))))))
2893 ;; Whole buffer contents.
2898 ;; Narrowing.
2902 ;; Current position of point.
2904 ;; Overlays with invisible property.
2914 ov-set))))
2916 ov-set)))))
2918 ;;;###autoload
2921 "Transcode current Org buffer into BACKEND code.
2923 BACKEND is either an export back-end, as returned by, e.g.,
2924 `org-export-create-backend', or a symbol referring to
2925 a registered back-end.
2927 If narrowing is active in the current buffer, only transcode its
2928 narrowed part.
2930 If a region is active, transcode that region.
2932 When optional argument SUBTREEP is non-nil, transcode the
2933 sub-tree at point, extracting information from the headline
2934 properties first.
2936 When optional argument VISIBLE-ONLY is non-nil, don't export
2937 contents of hidden elements.
2939 When optional argument BODY-ONLY is non-nil, only return body
2940 code, without surrounding template.
2942 Optional argument EXT-PLIST, when provided, is a property list
2943 with external parameters overriding Org default settings, but
2944 still inferior to file-local settings.
2946 Return code as a string."
2951 ;; Narrow buffer to an appropriate region or subtree for
2952 ;; parsing. If parsing subtree, be sure to remove main headline
2953 ;; too.
2961 ;; Initialize communication channel with original buffer
2962 ;; attributes, unavailable in its copy.
2971 tree)
2972 ;; Update communication channel and get parse tree. Buffer
2973 ;; isn't parsed directly. Instead, a temporary copy is
2974 ;; created, where include keywords, macros are expanded and
2975 ;; code blocks are evaluated.
2977 ;; Run first hook with current back-end's name as argument.
2981 ;; Update macro templates since #+INCLUDE keywords might have
2982 ;; added some new ones.
2986 ;; Update radio targets since keyword inclusion might have
2987 ;; added some more.
2989 ;; Run last hook with current back-end's name as argument.
2994 ;; Update communication channel with environment. Also
2995 ;; install user's and developer's filters.
3000 ;; Expand export-specific set of macros: {{{author}}},
3001 ;; {{{date}}}, {{{email}}} and {{{title}}}. It must be done
3002 ;; once regular macros have been expanded, since document
3003 ;; keywords may contain one of them.
3009 ;; EMAIL is not a parsed keyword: store it as-is.
3013 ;; Call options filters and update export options. We do not
3014 ;; use `org-export-filter-apply-functions' here since the
3015 ;; arity of such filters is different.
3020 ;; Parse buffer and call parse-tree filter on it.
3025 ;; Now tree is complete, compute its properties and add them
3026 ;; to communication channel.
3030 ;; Eventually transcode TREE. Wrap the resulting string into
3031 ;; a template.
3040 ;; Remove all text properties since they cannot be
3041 ;; retrieved from an external process. Finally call
3042 ;; final-output filter and return result.
3048 info))))))))
3050 ;;;###autoload
3052 "Transcode STRING into BACKEND code.
3054 BACKEND is either an export back-end, as returned by, e.g.,
3055 `org-export-create-backend', or a symbol referring to
3056 a registered back-end.
3058 When optional argument BODY-ONLY is non-nil, only return body
3059 code, without preamble nor postamble.
3061 Optional argument EXT-PLIST, when provided, is a property list
3062 with external parameters overriding Org default settings, but
3063 still inferior to file-local settings.
3065 Return code as a string."
3071 ;;;###autoload
3073 "Replace the active region by its export to BACKEND.
3074 BACKEND is either an export back-end, as returned by, e.g.,
3075 `org-export-create-backend', or a symbol referring to
3076 a registered back-end."
3086 ;;;###autoload
3088 "Insert all export keywords with default values at beginning of line.
3090 BACKEND is a symbol referring to the name of a registered export
3091 back-end, for which specific export options should be added to
3092 the template, or `default' for default template. When it is nil,
3093 the user will be prompted for a category.
3095 If SUBTREEP is non-nil, export configuration will be set up
3096 locally for the subtree through node properties."
3106 "Options category: "
3110 org-export--registered-backends))))))
3111 options keywords)
3112 ;; Populate OPTIONS and KEYWORDS.
3129 ;; Move to an appropriate location in order to insert options.
3131 ;; First get TITLE, DATE, AUTHOR and EMAIL if they belong to the
3132 ;; list of available keywords.
3160 ;; Then (multiple) OPTIONS lines. Never go past fill-column.
3179 ;; And the rest of keywords.
3190 "Expand every include keyword in buffer.
3191 Optional argument INCLUDED is a list of included file names along
3192 with their line restriction, when appropriate. It is used to
3193 avoid infinite recursion. Optional argument DIR is the current
3194 working directory. It is used to properly resolve relative
3195 paths."
3202 ;; Extract arguments from keyword's value.
3210 dir)
3215 value)
3221 ;; Minimal level of included file defaults to the child
3222 ;; level of the current headline, if any, or one. It
3223 ;; only applies is the file is meant to be included as
3224 ;; an Org one.
3232 ;; Remove keyword.
3238 ;; Check if files has already been parsed. Look after
3239 ;; inclusion lines too, as different parts of the same file
3240 ;; can be included too.
3252 ind-str contents ind-str))))
3260 ind-str env contents ind-str))))
3273 "Prepare the contents of FILE for inclusion and return them as a string.
3275 When optional argument LINES is a string specifying a range of
3276 lines, include only those lines.
3278 Optional argument IND, when non-nil, is an integer specifying the
3279 global indentation of returned contents. Since its purpose is to
3280 allow an included file to stay in the same environment it was
3281 created \(i.e. a list item), it doesn't apply past the first
3282 headline encountered.
3284 Optional argument MINLEVEL, when non-nil, is an integer
3285 specifying the level that any top-level headline in the included
3286 file should have."
3302 ;; Remove blank lines at beginning and end of contents. The logic
3303 ;; behind that removal is that blank lines around include keyword
3304 ;; override blank lines in included file.
3313 ;; If IND is set, preserve indentation of include keyword until
3314 ;; the first headline encountered.
3321 ;; Do not move footnote definitions out of column 0.
3327 ;; When MINLEVEL is specified, compute minimal level for headlines
3328 ;; in the file (CUR-MIN), and remove stars to each headline so
3329 ;; that headlines with minimal level have a level of MINLEVEL.
3340 ;; Only change stars, don't bother moving whole
3341 ;; sections.
3348 "Execute every Babel code in the visible part of current buffer."
3349 ;; Get a pristine copy of current buffer so Babel references can be
3350 ;; properly resolved.
3357 "Return a non-nil value when output should be added to the kill ring.
3358 See also `org-export-copy-to-kill-ring'."
3364 \f
3365 ;;; Tools For Back-Ends
3366 ;;
3367 ;; A whole set of tools is available to help build new exporters. Any
3368 ;; function general enough to have its use across many back-ends
3369 ;; should be added here.
3371 ;;;; For Affiliated Keywords
3372 ;;
3373 ;; `org-export-read-attribute' reads a property from a given element
3374 ;; as a plist. It can be used to normalize affiliated keywords'
3375 ;; syntax.
3376 ;;
3377 ;; Since captions can span over multiple lines and accept dual values,
3378 ;; their internal representation is a bit tricky. Therefore,
3379 ;; `org-export-get-caption' transparently returns a given element's
3380 ;; caption as a secondary string.
3383 "Turn ATTRIBUTE property from ELEMENT into a plist.
3385 When optional argument PROPERTY is non-nil, return the value of
3386 that property within attributes.
3390 properties.
3392 All values will become strings except the empty string and
3395 will become the empty string."
3409 s)
3414 ;; Ignore any string before first property with `cdr'.
3419 "Return caption from ELEMENT as a secondary string.
3421 When optional argument SHORTP is non-nil, return short caption,
3422 as a secondary string, instead.
3424 Caption lines are separated by a white space."
3432 ;;;; For Derived Back-ends
3433 ;;
3434 ;; `org-export-with-backend' is a function allowing to locally use
3435 ;; another back-end to transcode some object or element. In a derived
3436 ;; back-end, it may be used as a fall-back function once all specific
3437 ;; cases have been treated.
3440 "Call a transcoder from BACKEND on DATA.
3441 BACKEND is an export back-end, as returned by, e.g.,
3442 `org-export-create-backend', or a symbol referring to
3443 a registered back-end. DATA is an Org element, object, secondary
3444 string or string. CONTENTS, when non-nil, is the transcoded
3445 contents of DATA element, as a string. INFO, when non-nil, is
3446 the communication channel used for export, as a plist."
3457 ;;;; For Export Snippets
3458 ;;
3459 ;; Every export snippet is transmitted to the back-end. Though, the
3460 ;; latter will only retain one type of export-snippet, ignoring
3461 ;; others, based on the former's target back-end. The function
3462 ;; `org-export-snippet-backend' returns that back-end for a given
3463 ;; export-snippet.
3466 "Return EXPORT-SNIPPET targeted back-end as a symbol.
3467 Translation, with `org-export-snippet-translation-alist', is
3468 applied."
3472 back-end))))
3475 ;;;; For Footnotes
3476 ;;
3477 ;; `org-export-collect-footnote-definitions' is a tool to list
3478 ;; actually used footnotes definitions in the whole parse tree, or in
3479 ;; a headline, in order to add footnote listings throughout the
3480 ;; transcoded data.
3481 ;;
3482 ;; `org-export-footnote-first-reference-p' is a predicate used by some
3483 ;; back-ends, when they need to attach the footnote definition only to
3484 ;; the first occurrence of the corresponding label.
3485 ;;
3486 ;; `org-export-get-footnote-definition' and
3487 ;; `org-export-get-footnote-number' provide easier access to
3488 ;; additional information relative to a footnote reference.
3491 "Return an alist between footnote numbers, labels and definitions.
3493 DATA is the parse tree from which definitions are collected.
3494 INFO is the plist used as a communication channel.
3496 Definitions are sorted by order of references. They either
3497 appear as Org data or as a secondary string for inlined
3498 footnotes. Unreferenced definitions are ignored."
3500 collect-fn ; for byte-compiler.
3504 ;; Collect footnote number, label and definition in DATA.
3512 def)
3513 num-alist)
3514 ;; Also search in definition for nested footnotes.
3517 ;; Don't enter footnote definitions since it will happen
3518 ;; when their first reference is found.
3524 "Non-nil when a footnote reference is the first one for its label.
3526 FOOTNOTE-REFERENCE is the footnote reference being considered.
3527 INFO is the plist used as a communication channel."
3529 ;; Anonymous footnotes are always a first reference.
3531 ;; Otherwise, return the first footnote with the same LABEL and
3532 ;; test if it is equal to FOOTNOTE-REFERENCE.
3542 ;; If FN isn't inlined, be sure to traverse its
3543 ;; definition before resuming search. See
3544 ;; comments in `org-export-get-footnote-number'
3545 ;; for more information.
3549 ;; Don't enter footnote definitions since it will
3550 ;; happen when their first reference is found.
3553 footnote-reference)))))
3556 "Return definition of FOOTNOTE-REFERENCE as parsed data.
3557 INFO is the plist used as a communication channel. If no such
3559 string."
3566 "Return number associated to a footnote.
3568 FOOTNOTE is either a footnote reference or a footnote definition.
3569 INFO is the plist used as a communication channel."
3571 seen-refs
3572 search-ref ; For byte-compiler.
3576 ;; Search footnote references through DATA, filling
3577 ;; SEEN-REFS along the way.
3582 ;; Anonymous footnote match: return number.
3585 ;; Labels match: return number.
3588 ;; Anonymous footnote: it's always a new one.
3589 ;; Also, be sure to return nil from the `cond' so
3590 ;; `first-match' doesn't get us out of the loop.
3592 ;; Label not seen so far: add it so SEEN-REFS.
3593 ;;
3594 ;; Also search for subsequent references in
3595 ;; footnote definition so numbering follows
3596 ;; reading logic. Note that we don't have to care
3597 ;; about inline definitions, since
3598 ;; `org-element-map' already traverses them at the
3599 ;; right time.
3600 ;;
3601 ;; Once again, return nil to stay in the loop.
3606 nil))))
3607 ;; Don't enter footnote definitions since it will
3608 ;; happen when their first reference is found.
3613 ;;;; For Headlines
3614 ;;
3615 ;; `org-export-get-relative-level' is a shortcut to get headline
3616 ;; level, relatively to the lower headline level in the parsed tree.
3617 ;;
3618 ;; `org-export-get-headline-number' returns the section number of an
3619 ;; headline, while `org-export-number-to-roman' allows to convert it
3620 ;; to roman numbers.
3621 ;;
3622 ;; `org-export-low-level-p', `org-export-first-sibling-p' and
3623 ;; `org-export-last-sibling-p' are three useful predicates when it
3624 ;; comes to fulfill the `:headline-levels' property.
3625 ;;
3626 ;; `org-export-get-tags', `org-export-get-category' and
3627 ;; `org-export-get-node-property' extract useful information from an
3628 ;; headline or a parent headline. They all handle inheritance.
3629 ;;
3630 ;; `org-export-get-alt-title' tries to retrieve an alternative title,
3631 ;; as a secondary string, suitable for table of contents. It falls
3632 ;; back onto default title.
3635 "Return HEADLINE relative level within current parsed tree.
3636 INFO is a plist holding contextual information."
3641 "Non-nil when HEADLINE is considered as low level.
3643 INFO is a plist used as a communication channel.
3645 A low level headlines has a relative level greater than
3646 `:headline-levels' property value.
3648 Return value is the difference between HEADLINE relative level
3649 and the last level being considered as high enough, or nil."
3656 "Return HEADLINE numbering as a list of numbers.
3657 INFO is a plist holding contextual information."
3661 "Return a non-nil value if HEADLINE element should be numbered.
3662 INFO is a plist used as a communication channel."
3668 "Convert integer N into a roman numeral."
3681 res)))
3684 "Return list of tags associated to ELEMENT.
3686 ELEMENT has either an `headline' or an `inlinetask' type. INFO
3687 is a plist used as a communication channel.
3689 Select tags (see `org-export-select-tags') and exclude tags (see
3690 `org-export-exclude-tags') are removed from the list.
3692 When non-nil, optional argument TAGS should be a list of strings.
3693 Any tag belonging to this list will also be removed.
3695 When optional argument INHERITED is non-nil, tags can also be
3696 inherited from parent headlines and FILETAGS keywords."
3702 ;; Build complete list of inherited tags.
3713 ;; Add FILETAGS keywords and return results.
3717 "Return node PROPERTY value for BLOB.
3719 PROPERTY is an upcase symbol (i.e. `:COOKIE_DATA'). BLOB is an
3720 element or object.
3722 If optional argument INHERITED is non-nil, the value can be
3723 inherited from a parent headline.
3725 Return value is a string or nil."
3737 "Return category for element or object BLOB.
3739 INFO is a plist used as a communication channel.
3741 CATEGORY is automatically inherited from a parent headline, from
3742 #+CATEGORY: keyword or created out of original file name. If all
3746 ;; Almost like `org-export-node-property', but we cannot trust
3747 ;; `plist-member' as every headline has a `:CATEGORY'
3748 ;; property, would it be nil or equal to "???" (which has the
3749 ;; same meaning).
3767 "Return alternative title for HEADLINE, as a secondary string.
3768 INFO is a plist used as a communication channel. If no optional
3769 title is defined, fall-back to the regular title."
3774 "Non-nil when HEADLINE is the first sibling in its sub-tree.
3775 INFO is a plist used as a communication channel."
3780 "Non-nil when HEADLINE is the last sibling in its sub-tree.
3781 INFO is a plist used as a communication channel."
3785 ;;;; For Keywords
3786 ;;
3787 ;; `org-export-get-date' returns a date appropriate for the document
3788 ;; to about to be exported. In particular, it takes care of
3789 ;; `org-export-date-timestamp-format'.
3792 "Return date value for the current document.
3794 INFO is a plist used as a communication channel. FMT, when
3795 non-nil, is a time format string that will be applied on the date
3796 if it consists in a single timestamp object. It defaults to
3797 `org-export-date-timestamp-format' when nil.
3799 A proper date can be a secondary string, a string or nil. It is
3800 meant to be translated with `org-export-data' or alike."
3811 ;;;; For Links
3812 ;;
3813 ;; `org-export-solidify-link-text' turns a string into a safer version
3814 ;; for links, replacing most non-standard characters with hyphens.
3815 ;;
3816 ;; `org-export-get-coderef-format' returns an appropriate format
3817 ;; string for coderefs.
3818 ;;
3819 ;; `org-export-inline-image-p' returns a non-nil value when the link
3820 ;; provided should be considered as an inline image.
3821 ;;
3822 ;; `org-export-resolve-fuzzy-link' searches destination of fuzzy links
3823 ;; (i.e. links with "fuzzy" as type) within the parsed tree, and
3824 ;; returns an appropriate unique identifier when found, or nil.
3825 ;;
3826 ;; `org-export-resolve-id-link' returns the first headline with
3827 ;; specified id or custom-id in parse tree, the path to the external
3828 ;; file with the id or nil when neither was found.
3829 ;;
3830 ;; `org-export-resolve-coderef' associates a reference to a line
3831 ;; number in the element it belongs, or returns the reference itself
3832 ;; when the element isn't numbered.
3835 "Take link text S and make a safe target out of it."
3840 "Return format string for code reference link.
3841 PATH is the link path. DESC is its description."
3849 "Non-nil if LINK object points to an inline image.
3851 Optional argument is a set of RULES defining inline images. It
3852 is an alist where associations have the following shape:
3854 \(TYPE . REGEXP)
3856 Applying a rule means apply REGEXP against LINK's path when its
3857 type is TYPE. The function will return a non-nil value if any of
3858 the provided rules is non-nil. The default rule is
3859 `org-export-default-inline-image-rule'.
3861 This only applies to links without a description."
3872 rules)
3873 ;; Return nil if no rule matched.
3874 nil))))
3877 "Resolve a code reference REF.
3879 INFO is a plist used as a communication channel.
3881 Return associated line number in source code, or REF itself,
3882 depending on src-block or example element's switches."
3889 org-coderef-label-format)))
3893 ;; Element containing REF is found. Resolve it to either
3894 ;; a label or a line number, as needed.
3904 "Return LINK destination.
3906 INFO is a plist holding contextual information.
3908 Return value can be an object, an element, or nil:
3910 - If LINK path matches a target object (i.e. <<path>>) return it.
3912 - If LINK path exactly matches the name affiliated keyword
3913 \(i.e. #+NAME: path) of an element, return that element.
3915 - If LINK path exactly matches any headline name, return that
3916 element. If more than one headline share that name, priority
3917 will be given to the one with the closest common ancestor, if
3918 any, or the first one in the parse tree otherwise.
3920 - Otherwise, return nil.
3923 significant."
3926 ;; Split PATH at white spaces so matches are space
3927 ;; insensitive.
3930 ;; Cache for destinations that are not position dependent.
3938 ;; Destination is not position dependent: use cached value.
3940 ;; First try to find a matching "<<path>>" unless user specified
3941 ;; he was looking for a headline (path starts with a "*"
3942 ;; character).
3948 path)
3949 blob))
3952 ;; Then try to find an element with a matching "#+NAME: path"
3953 ;; affiliated keyword.
3956 org-element-all-elements
3961 el)))
3964 ;; Last case: link either points to a headline or to nothingness.
3965 ;; Try to find the source, with priority given to headlines with
3966 ;; the closest common ancestor. If such candidate is found,
3967 ;; return it, otherwise return nil.
3971 ;; Return first headline whose `:raw-value' property is
3972 ;; NAME in parse tree DATA, or nil. Statistics cookies
3973 ;; are ignored.
3981 name)
3982 headline))
3984 ;; Search among headlines sharing an ancestor with link, from
3985 ;; closest to farthest.
3994 ;; No destination found: return nil.
3998 "Return headline referenced as LINK destination.
4000 INFO is a plist used as a communication channel.
4002 Return value can be the headline element matched in current parse
4006 ;; First check if id is within the current parse tree.
4011 headline))
4013 ;; Otherwise, look for external files.
4017 "Return radio-target object referenced as LINK destination.
4019 INFO is a plist used as a communication channel.
4021 Return value can be a radio-target object or nil. Assume LINK
4030 nil nil path nil nil t)
4031 t)
4032 radio))
4036 ;;;; For References
4037 ;;
4038 ;; `org-export-get-ordinal' associates a sequence number to any object
4039 ;; or element.
4042 "Return ordinal number of an element or object.
4044 ELEMENT is the element or object considered. INFO is the plist
4045 used as a communication channel.
4047 Optional argument TYPES, when non-nil, is a list of element or
4048 object types, as symbols, that should also be counted in.
4049 Otherwise, only provided element's type is considered.
4051 Optional argument PREDICATE is a function returning a non-nil
4052 value if the current element or object should be counted in. It
4053 accepts two arguments: the element or object being considered and
4054 the plist used as a communication channel. This allows to count
4055 only a certain type of objects (i.e. inline images).
4057 Return value is a list of numbers if ELEMENT is a headline or an
4058 item. It is nil for keywords. It represents the footnote number
4059 for footnote definitions and footnote references. If ELEMENT is
4060 a target, return the same value as if ELEMENT was the closest
4061 table, item or headline containing the target. In any other
4062 case, return the sequence number of ELEMENT among elements or
4063 objects of the same type."
4064 ;; Ordinal of a target object refer to the ordinal of the closest
4065 ;; table, item, or headline containing the object.
4069 when
4073 table))
4074 return parent)))
4076 ;; Special case 1: A headline returns its number as a list.
4078 ;; Special case 2: An item returns its number as a list.
4082 struct
4089 ;; Increment counter until ELEMENT is found again.
4100 ;;;; For Src-Blocks
4101 ;;
4102 ;; `org-export-get-loc' counts number of code lines accumulated in
4103 ;; src-block or example-block elements with a "+n" switch until
4104 ;; a given element, excluded. Note: "-n" switches reset that count.
4105 ;;
4106 ;; `org-export-unravel-code' extracts source code (along with a code
4107 ;; references alist) from an `element-block' or `src-block' type
4108 ;; element.
4109 ;;
4110 ;; `org-export-format-code' applies a formatting function to each line
4111 ;; of code, providing relative line number and code reference when
4112 ;; appropriate. Since it doesn't access the original element from
4113 ;; which the source code is coming, it expects from the code calling
4114 ;; it to know if lines should be numbered and if code references
4115 ;; should appear.
4116 ;;
4117 ;; Eventually, `org-export-format-code-default' is a higher-level
4118 ;; function (it makes use of the two previous functions) which handles
4119 ;; line numbering and code references inclusion, and returns source
4120 ;; code in a format suitable for plain text or verbatim output.
4123 "Return accumulated lines of code up to ELEMENT.
4125 INFO is the plist used as a communication channel.
4127 ELEMENT is excluded from count."
4133 ;; ELEMENT is reached: Quit the loop.
4135 ;; Only count lines from src-block and example-block elements
4136 ;; with a "+n" or "-n" switch. A "-n" switch resets counter.
4140 ;; Accumulate locs or reset them.
4144 ;; Return nil to stay in the loop.
4145 nil)))
4147 ;; Return value.
4148 loc))
4151 "Clean source code and extract references out of it.
4153 ELEMENT has either a `src-block' an `example-block' type.
4155 Return a cons cell whose CAR is the source code, cleaned from any
4156 reference and protective comma and CDR is an alist between
4157 relative line number (integer) and name of code reference on that
4158 line (string)."
4160 ;; Get code and clean it. Remove blank lines at its
4161 ;; beginning and end.
4167 ;; Get format used for references.
4170 org-coderef-label-format)))
4171 ;; Build a regexp matching a loc with a reference.
4176 ;; Return value.
4178 ;; Code with references removed.
4184 ;; Ref line: remove ref, and signal its position in REFS.
4188 ;; Reference alist.
4189 refs)))
4192 "Format CODE by applying FUN line-wise and return it.
4194 CODE is a string representing the code to format. FUN is
4195 a function. It must accept three arguments: a line of
4196 code (string), the current line number (integer) or nil and the
4197 reference associated to the current line (string) or nil.
4199 Optional argument NUM-LINES can be an integer representing the
4200 number of code lines accumulated until the current code. Line
4201 numbers passed to FUN will take it into account. If it is nil,
4202 FUN's second argument will always be nil. This number can be
4203 obtained with `org-export-get-loc' function.
4205 Optional argument REF-ALIST can be an alist between relative line
4206 number (i.e. ignoring NUM-LINES) and the name of the code
4207 reference on it. If it is nil, FUN's third argument will always
4208 be nil. It can be obtained through the use of
4209 `org-export-unravel-code' function."
4221 "Return source code from ELEMENT, formatted in a standard way.
4223 ELEMENT is either a `src-block' or `example-block' element. INFO
4224 is a plist used as a communication channel.
4226 This function takes care of line numbering and code references
4227 inclusion. Line numbers, when applicable, appear at the
4228 beginning of the line, separated from the code by two white
4229 spaces. Code references, on the other hand, appear flushed to
4230 the right, separated by six white spaces from the widest line of
4231 code."
4232 ;; Extract code and references.
4239 ;; Handle line numbering.
4248 ;; Prepare references display, if required. Any reference
4249 ;; should start six columns after the widest line of code,
4250 ;; wrapped with parenthesis.
4255 code
4259 number-str
4260 loc
4266 num-start refs)))))
4269 ;;;; For Tables
4270 ;;
4271 ;; `org-export-table-has-special-column-p' and and
4272 ;; `org-export-table-row-is-special-p' are predicates used to look for
4273 ;; meta-information about the table structure.
4274 ;;
4275 ;; `org-table-has-header-p' tells when the rows before the first rule
4276 ;; should be considered as table's header.
4277 ;;
4278 ;; `org-export-table-cell-width', `org-export-table-cell-alignment'
4279 ;; and `org-export-table-cell-borders' extract information from
4280 ;; a table-cell element.
4281 ;;
4282 ;; `org-export-table-dimensions' gives the number on rows and columns
4283 ;; in the table, ignoring horizontal rules and special columns.
4284 ;; `org-export-table-cell-address', given a table-cell object, returns
4285 ;; the absolute address of a cell. On the other hand,
4286 ;; `org-export-get-table-cell-at' does the contrary.
4287 ;;
4288 ;; `org-export-table-cell-starts-colgroup-p',
4289 ;; `org-export-table-cell-ends-colgroup-p',
4290 ;; `org-export-table-row-starts-rowgroup-p',
4291 ;; `org-export-table-row-ends-rowgroup-p',
4292 ;; `org-export-table-row-starts-header-p' and
4293 ;; `org-export-table-row-ends-header-p' indicate position of current
4294 ;; row or cell within the table.
4297 "Non-nil when TABLE has a special column.
4298 All special columns will be ignored during export."
4299 ;; The table has a special column when every first cell of every row
4300 ;; has an empty value or contains a symbol among "/", "#", "!", "$",
4301 ;; "*" "_" and "^". Though, do not consider a first row containing
4302 ;; only empty cells as special.
4318 "Non-nil when TABLE has a header.
4320 INFO is a plist used as a communication channel.
4322 A table has a header when it contains at least two row groups."
4331 table
4342 cache)))))
4345 "Non-nil if TABLE-ROW is considered special.
4347 INFO is a plist used as the communication channel.
4349 All special rows will be ignored during export."
4353 ;; A row is special either when...
4355 ;; ... it starts with a field only containing "/",
4357 ;; ... the table contains a special column and the row start
4358 ;; with a marking character among, "^", "_", "$" or "!",
4362 ;; ... it contains only alignment cookies and empty cells.
4368 ;; Since VALUE is a secondary string, the following
4369 ;; checks avoid expanding it with `org-export-data'.
4381 "Return TABLE-ROW's group number, as an integer.
4383 INFO is a plist used as the communication channel.
4385 Return value is the group number, as an integer, or nil for
4386 special rows and rows separators. First group is also table's
4387 header."
4405 "Return TABLE-CELL contents width.
4407 INFO is a plist used as the communication channel.
4409 Return value is the width given by the last width cookie in the
4410 same column as TABLE-CELL, or nil."
4427 ;; In a special row, try to find a width cookie at COLUMN.
4431 ;; The following checks avoid expanding unnecessarily
4432 ;; the cell with `org-export-data'.
4442 "Return TABLE-CELL contents alignment.
4444 INFO is a plist used as the communication channel.
4446 Return alignment as specified by the last alignment cookie in the
4447 same column as TABLE-CELL. If no such cookie is found, a default
4448 alignment value will be deduced from fraction of numbers in the
4449 column (see `org-table-number-fraction' for more information).
4450 Possible values are `left', `right' and `center'."
4463 cookie-align
4464 previous-cell-number-p)
4467 ;; In a special row, try to find an alignment cookie at
4468 ;; COLUMN.
4472 ;; Since VALUE is a secondary string, the following
4473 ;; checks avoid useless expansion through
4474 ;; `org-export-data'.
4482 ;; Ignore table rules.
4484 ;; In a standard row, check if cell's contents are
4485 ;; expressing some kind of number. Increase NUMBER-CELLS
4486 ;; accordingly. Though, don't bother if an alignment
4487 ;; cookie has already defined cell's alignment.
4492 info)))
4494 ;; Treat an empty cell as a number if it follows
4495 ;; a number.
4501 ;; Return value. Alignment specified by cookies has
4502 ;; precedence over alignment deduced from cell's contents.
4508 org-table-number-fraction)
4511 cache)))))
4514 "Return TABLE-CELL borders.
4516 INFO is a plist used as a communication channel.
4518 Return value is a list of symbols, or nil. Possible values are:
4519 `top', `bottom', `above', `below', `left' and `right'. Note:
4520 `top' (resp. `bottom') only happen for a cell in the first
4521 row (resp. last row) of the table, ignoring table rules, if any.
4523 Returned borders ignore special rows."
4526 borders)
4527 ;; Top/above border? TABLE-CELL has a border above when a rule
4528 ;; used to demarcate row groups can be found above. Hence,
4529 ;; finding a rule isn't sufficient to push `above' in BORDERS:
4530 ;; another regular row has to be found above that rule.
4539 ;; Look at every row before the current one.
4541 ;; No rule above, or rule found starts the table (ignoring any
4542 ;; special row): TABLE-CELL is at the top of the table.
4545 ;; Bottom/below border? TABLE-CELL has a border below when next
4546 ;; non-regular row below is a rule.
4555 ;; Look at every row after the current one.
4557 ;; No rule below, or rule found ends the table (modulo some
4558 ;; special row): TABLE-CELL is at the bottom of the table.
4561 ;; Right/left borders? They can only be specified by column
4562 ;; groups. Column groups are defined in a row starting with "/".
4563 ;; Also a column groups row only contains "<", "<>", ">" or blank
4564 ;; cells.
4581 ;; There's a left border when previous cell, if
4582 ;; any, ends a group, or current one starts one.
4588 ;; There's a right border when next cell, if any,
4589 ;; starts a group, or current one ends one.
4596 ;; Table rows are read in reverse order so last column groups
4597 ;; row has precedence over any previous one.
4599 ;; Return value.
4600 borders))
4603 "Non-nil when TABLE-CELL is at the beginning of a row group.
4604 INFO is a plist used as a communication channel."
4605 ;; A cell starts a column group either when it is at the beginning
4606 ;; of a row (or after the special column, if any) or when it has
4607 ;; a left border.
4610 table-cell)
4614 "Non-nil when TABLE-CELL is at the end of a row group.
4615 INFO is a plist used as a communication channel."
4616 ;; A cell ends a column group either when it is at the end of a row
4617 ;; or when it has a right border.
4620 table-cell)
4624 "Non-nil when TABLE-ROW is at the beginning of a column group.
4625 INFO is a plist used as a communication channel."
4633 "Non-nil when TABLE-ROW is at the end of a column group.
4634 INFO is a plist used as a communication channel."
4642 "Non-nil when TABLE-ROW is the first table header's row.
4643 INFO is a plist used as a communication channel."
4650 "Non-nil when TABLE-ROW is the last table header's row.
4651 INFO is a plist used as a communication channel."
4658 "Return TABLE-ROW number.
4659 INFO is a plist used as a communication channel. Return value is
4660 zero-based and ignores separators. The function returns nil for
4661 special colums and separators."
4673 "Return TABLE dimensions.
4675 INFO is a plist used as a communication channel.
4677 Return value is a CONS like (ROWS . COLUMNS) where
4678 ROWS (resp. COLUMNS) is the number of exportable
4679 rows (resp. columns)."
4681 ;; Set number of rows, and extract first one.
4687 ;; Set number of columns.
4689 ;; Return value.
4693 "Return address of a regular TABLE-CELL object.
4695 TABLE-CELL is the cell considered. INFO is a plist used as
4696 a communication channel.
4698 Address is a CONS cell (ROW . COLUMN), where ROW and COLUMN are
4699 zero-based index. Only exportable cells are considered. The
4700 function returns nil for other cells."
4712 "Return regular table-cell object at ADDRESS in TABLE.
4714 Address is a CONS cell (ROW . COLUMN), where ROW and COLUMN are
4715 zero-based index. TABLE is a table type element. INFO is
4716 a plist used as a communication channel.
4718 If no table-cell, among exportable cells, is found at ADDRESS,
4719 return nil."
4722 ;; Row at (car address) or nil.
4730 'table-cell
4737 ;;;; For Tables Of Contents
4738 ;;
4739 ;; `org-export-collect-headlines' builds a list of all exportable
4740 ;; headline elements, maybe limited to a certain depth. One can then
4741 ;; easily parse it and transcode it.
4742 ;;
4743 ;; Building lists of tables, figures or listings is quite similar.
4744 ;; Once the generic function `org-export-collect-elements' is defined,
4745 ;; `org-export-collect-tables', `org-export-collect-figures' and
4746 ;; `org-export-collect-listings' can be derived from it.
4749 "Collect headlines in order to build a table of contents.
4751 INFO is a plist used as a communication channel.
4753 When optional argument N is an integer, it specifies the depth of
4754 the table of contents. Otherwise, it is set to the value of the
4755 last headline level. See `org-export-headline-levels' for more
4756 information.
4758 Return a list of all exportable headlines as parsed elements.
4759 Footnote sections, if any, will be ignored."
4764 ;; Strip contents from HEADLINE.
4767 info))
4770 "Collect referenceable elements of a determined type.
4772 TYPE can be a symbol or a list of symbols specifying element
4773 types to search. Only elements with a caption are collected.
4775 INFO is a plist used as a communication channel.
4777 When non-nil, optional argument PREDICATE is a function accepting
4778 one argument, an element of type TYPE. It returns a non-nil
4779 value when that element should be collected.
4781 Return a list of all elements found, in order of appearance."
4786 element))
4787 info))
4790 "Build a list of tables.
4791 INFO is a plist used as a communication channel.
4793 Return a list of table elements with a caption."
4797 "Build a list of figures.
4799 INFO is a plist used as a communication channel. PREDICATE is
4800 a function which accepts one argument: a paragraph element and
4801 whose return value is non-nil when that element should be
4802 collected.
4804 A figure is a paragraph type element, with a caption, verifying
4806 a vague concept that may depend on back-end.
4808 Return a list of elements recognized as figures."
4812 "Build a list of src blocks.
4814 INFO is a plist used as a communication channel.
4816 Return a list of src-block elements with a caption."
4820 ;;;; Smart Quotes
4821 ;;
4822 ;; The main function for the smart quotes sub-system is
4823 ;; `org-export-activate-smart-quotes', which replaces every quote in
4824 ;; a given string from the parse tree with its "smart" counterpart.
4825 ;;
4826 ;; Dictionary for smart quotes is stored in
4827 ;; `org-export-smart-quotes-alist'.
4828 ;;
4829 ;; Internally, regexps matching potential smart quotes (checks at
4830 ;; string boundaries are also necessary) are defined in
4831 ;; `org-export-smart-quotes-regexps'.
4835 ;; one may use: »...«, "...", ›...‹, or '...'.
4836 ;; http://sproget.dk/raad-og-regler/retskrivningsregler/retskrivningsregler/a7-40-60/a7-58-anforselstegn/
4837 ;; LaTeX quotes require Babel!
4882 ;; https://nn.wikipedia.org/wiki/Sitatteikn
4891 ;; https://nn.wikipedia.org/wiki/Sitatteikn
4900 ;; https://nn.wikipedia.org/wiki/Sitatteikn
4909 ;; based on https://sv.wikipedia.org/wiki/Citattecken
4915 )
4916 "Smart quotes translations.
4918 Alist whose CAR is a language string and CDR is an alist with
4919 quote type as key and a plist associating various encodings to
4920 their translation as value.
4922 A quote type can be any symbol among `opening-double-quote',
4923 `closing-double-quote', `opening-single-quote',
4924 `closing-single-quote' and `apostrophe'.
4926 Valid encodings include `:utf-8', `:html', `:latex' and
4927 `:texinfo'.
4933 ;; Possible opening quote at beginning of string.
4935 ;; Possible closing quote at beginning of string.
4937 ;; Possible apostrophe at beginning of string.
4939 ;; Opening single and double quotes.
4941 ;; Closing single and double quotes.
4943 ;; Apostrophe.
4945 ;; Possible opening quote at end of string.
4947 ;; Possible closing quote at end of string.
4949 ;; Possible apostrophe at end of string.
4951 "List of regexps matching a quote or an apostrophe.
4957 ENCODING is a symbol among `:html', `:latex', `:texinfo' and
4958 `:utf-8'. INFO is a plist used as a communication channel.
4960 The function has to retrieve information about string
4961 surroundings in parse tree. It can only happen with an
4962 unmodified string. Thus, if S has already been through another
4963 process, a non-nil ORIGINAL optional argument will provide that
4964 original string.
4966 Return the new string."
4969 ;; Try to be flexible when computing number of blanks
4970 ;; before object. The previous object may be a string
4971 ;; introduced by the back-end and not completely parsed.
4974 ;; A string with missing `:post-blank'
4975 ;; property.
4979 ;; Fallback value.
4984 ;; Return smart quote associated to a give quote Q, as
4985 ;; a string. TYPE is a symbol among `open', `close' and
4986 ;; `apostrophe'.
4996 org-export-smart-quotes-alist))))
4997 encoding)
4998 q)))))
5000 ;; Only a quote: no regexp can match. We have to check both
5001 ;; sides and decide what to do.
5009 ;; 1. Replace quote character at the beginning of S.
5011 ;; Apostrophe?
5017 ;; Closing quote?
5023 ;; Opening quote?
5029 ;; 2. Replace quotes in the middle of the string.
5031 ;; Opening quotes.
5037 ;; Closing quotes.
5043 ;; Apostrophes.
5048 ;; 3. Replace quote character at the end of S.
5050 ;; Apostrophe?
5055 ;; Closing quote?
5061 ;; Opening quote?
5066 ;; Return string with smart quotes.
5067 s))))
5069 ;;;; Topology
5070 ;;
5071 ;; Here are various functions to retrieve information about the
5072 ;; neighbourhood of a given element or object. Neighbours of interest
5073 ;; are direct parent (`org-export-get-parent'), parent headline
5074 ;; (`org-export-get-parent-headline'), first element containing an
5075 ;; object, (`org-export-get-parent-element'), parent table
5076 ;; (`org-export-get-parent-table'), previous element or object
5077 ;; (`org-export-get-previous-element') and next element or object
5078 ;; (`org-export-get-next-element').
5079 ;;
5080 ;; `org-export-get-genealogy' returns the full genealogy of a given
5081 ;; element or object, from closest parent to full parse tree.
5084 "Return BLOB parent or nil.
5085 BLOB is the element or object considered."
5089 "Return full genealogy relative to a given element or object.
5091 BLOB is the element or object being considered.
5093 Ancestors are returned from closest to farthest, the last one
5094 being the full parse tree."
5101 "Return BLOB parent headline or nil.
5102 BLOB is the element or object being considered."
5106 parent))
5109 "Return first element containing OBJECT or nil.
5110 OBJECT is the object to consider."
5114 parent))
5117 "Return OBJECT parent table or nil.
5118 OBJECT is either a `table-cell' or `table-element' type object."
5122 parent))
5125 "Return previous element or object.
5127 BLOB is an element or object. INFO is a plist used as
5128 a communication channel. Return previous exportable element or
5129 object, a string, or nil.
5131 When optional argument N is a positive integer, return a list
5132 containing up to N siblings before BLOB, from farthest to
5133 closest. With any other non-nil value, return a list containing
5134 all of them."
5136 ;; An object can belong to the contents of its parent or
5137 ;; to a secondary string. We check the latter option
5138 ;; first.
5141 org-element-all-elements))
5145 org-element-secondary-value-alist))
5146 parent)))
5149 prev)
5158 prev)))
5161 "Return next element or object.
5163 BLOB is an element or object. INFO is a plist used as
5164 a communication channel. Return next exportable element or
5165 object, a string, or nil.
5167 When optional argument N is a positive integer, return a list
5168 containing up to N siblings after BLOB, from closest to farthest.
5169 With any other non-nil value, return a list containing all of
5170 them."
5172 ;; An object can belong to the contents of its parent or to
5173 ;; a secondary string. We check the latter option first.
5176 org-element-all-objects))
5180 org-element-secondary-value-alist))
5181 parent)))
5184 next)
5192 siblings)
5196 ;;;; Translation
5197 ;;
5198 ;; `org-export-translate' translates a string according to the language
5199 ;; specified by the LANGUAGE keyword. `org-export-dictionary' contains
5200 ;; the dictionary used for the translation.
5384 "Dictionary for export engine.
5386 Alist whose CAR is the string to translate and CDR is an alist
5387 whose CAR is the language string and CDR is a plist whose
5388 properties are possible charsets and values translated terms.
5390 It is used as a database for `org-export-translate'. Since this
5391 function returns the string as-is if no translation was found,
5392 the variable only needs to record values different from the
5396 "Translate string S according to language specification.
5398 ENCODING is a symbol among `:ascii', `:html', `:latex', `:latin1'
5399 and `:utf-8'. INFO is a plist used as a communication channel.
5401 Translation depends on `:language' property. Return the
5402 translated string. If no translation is found, try to fall back
5403 to `:default' encoding. If it fails, return S."
5409 s)))
5412 \f
5413 ;;; Asynchronous Export
5414 ;;
5415 ;; `org-export-async-start' is the entry point for asynchronous
5416 ;; export. It recreates current buffer (including visibility,
5417 ;; narrowing and visited file) in an external Emacs process, and
5418 ;; evaluates a command there. It then applies a function on the
5419 ;; returned results in the current process.
5420 ;;
5421 ;; At a higher level, `org-export-to-buffer' and `org-export-to-file'
5422 ;; allow to export to a buffer or a file, asynchronously or not.
5423 ;;
5424 ;; `org-export-output-file-name' is an auxiliary function meant to be
5425 ;; used with `org-export-to-file'. With a given extension, it tries
5426 ;; to provide a canonical file name to write export output to.
5427 ;;
5428 ;; Asynchronously generated results are never displayed directly.
5429 ;; Instead, they are stored in `org-export-stack-contents'. They can
5430 ;; then be retrieved by calling `org-export-stack'.
5431 ;;
5432 ;; Export Stack is viewed through a dedicated major mode
5433 ;;`org-export-stack-mode' and tools: `org-export-stack-refresh',
5434 ;;`org-export-stack-delete', `org-export-stack-view' and
5435 ;;`org-export-stack-clear'.
5436 ;;
5437 ;; For back-ends, `org-export-add-to-stack' add a new source to stack.
5438 ;; It should be used whenever `org-export-async-start' is called.
5441 "Call function FUN on the results returned by BODY evaluation.
5443 BODY evaluation happens in an asynchronous process, from a buffer
5444 which is an exact copy of the current one.
5446 Use `org-export-add-to-stack' in FUN in order to register results
5447 in the stack.
5449 This is a low level function. See also `org-export-to-buffer'
5450 and `org-export-to-file' for more specialized functions."
5453 ;; Write the full sexp evaluating BODY in a copy of the current
5454 ;; buffer to a temporary file, as it may be too long for program
5455 ;; args in `start-process'.
5462 ;; Null characters (from variable values) are inserted
5463 ;; within the file. As a consequence, coding system for
5464 ;; buffer contents will not be recognized properly. So,
5465 ;; we make sure it is the same as the one used to display
5466 ;; the original buffer.
5468 ,coding
5471 ;; Ignore `kill-emacs-hook' and code evaluation
5472 ;; queries from Babel as we need a truly
5473 ;; non-interactive process.
5475 org-babel-confirm-evaluate-answer-no t)
5476 ;; Initialize export framework.
5478 ;; Re-create current buffer there.
5481 ;; Sexp to evaluate in the buffer.
5483 ;; Start external process.
5486 (,process
5491 "-l" org-export-async-init-file
5493 ;; Register running process in stack.
5495 ;; Set-up sentinel in order to catch results.
5498 ,process
5520 ;;;###autoload
5523 &optional async subtreep visible-only body-only ext-plist
5524 post-process)
5525 "Call `org-export-as' with output to a specified buffer.
5527 BACKEND is either an export back-end, as returned by, e.g.,
5528 `org-export-create-backend', or a symbol referring to
5529 a registered back-end.
5531 BUFFER is the name of the output buffer. If it already exists,
5532 it will be erased first, otherwise, it will be created.
5534 A non-nil optional argument ASYNC means the process should happen
5535 asynchronously. The resulting buffer should then be accessible
5536 through the `org-export-stack' interface. When ASYNC is nil, the
5537 buffer is displayed if `org-export-show-temporary-export-buffer'
5538 is non-nil.
5540 Optional arguments SUBTREEP, VISIBLE-ONLY, BODY-ONLY and
5541 EXT-PLIST are similar to those used in `org-export-as', which
5542 see.
5544 Optional argument POST-PROCESS is a function which should accept
5545 no argument. It is called within the current process, from
5546 BUFFER, with point at its beginning. Export back-ends can use it
5547 to set a major mode there, e.g,
5549 \(defun org-latex-export-as-latex
5550 \(&optional async subtreep visible-only body-only ext-plist)
5551 \(interactive)
5553 async subtreep visible-only body-only ext-plist (lambda () (LaTeX-mode))))
5555 This function returns BUFFER."
5583 buffer)))
5585 ;;;###autoload
5588 post-process)
5589 "Call `org-export-as' with output to a specified file.
5591 BACKEND is either an export back-end, as returned by, e.g.,
5592 `org-export-create-backend', or a symbol referring to
5593 a registered back-end. FILE is the name of the output file, as
5594 a string.
5596 A non-nil optional argument ASYNC means the process should happen
5597 asynchronously. The resulting buffer file then be accessible
5598 through the `org-export-stack' interface.
5600 Optional arguments SUBTREEP, VISIBLE-ONLY, BODY-ONLY and
5601 EXT-PLIST are similar to those used in `org-export-as', which
5602 see.
5604 Optional argument POST-PROCESS is called with FILE as its
5605 argument, in the asynchronous process. It has to return a file
5606 name, or nil. Export back-ends can use this to send the output
5607 file through additional processing, e.g,
5609 \(defun org-latex-export-to-latex
5610 \(&optional async subtreep visible-only body-only ext-plist)
5611 \(interactive)
5613 \(org-export-to-file 'latex outfile
5614 async subtreep visible-only body-only ext-plist
5615 \(lambda (file) (org-latex-compile file)))
5617 The function returns either a file name returned by POST-PROCESS,
5618 or FILE."
5636 backend subtreep visible-only body-only ext-plist)))
5643 ;; Get proper return value.
5645 file))))))
5648 "Return output file's name according to buffer specifications.
5650 EXTENSION is a string representing the output file extension,
5651 with the leading dot.
5653 With a non-nil optional argument SUBTREEP, try to determine
5655 of subtree at point.
5657 When optional argument PUB-DIR is set, use it as the publishing
5658 directory.
5660 When optional argument VISIBLE-ONLY is non-nil, don't export
5661 contents of hidden elements.
5663 Return file name as a string."
5666 ;; File name may come from EXPORT_FILE_NAME subtree
5667 ;; property, assuming point is at beginning of said
5668 ;; sub-tree.
5675 ;; File name may be extracted from buffer's associated
5676 ;; file, if any.
5678 ;; Can't determine file name on our own: Ask user.
5682 "Output file: " pub-dir nil nil nil
5686 ;; Build file name. Enforce EXTENSION over whatever user
5687 ;; may have come up with. PUB-DIR, if defined, always has
5688 ;; precedence over any provided path.
5693 extension))
5696 ;; If writing to OUTPUT-FILE would overwrite original file, append
5697 ;; EXTENSION another time to final name.
5700 output-file)))
5703 "Add a new result to export stack if not present already.
5705 SOURCE is a buffer or a file name containing export results.
5706 BACKEND is a symbol representing export back-end used to generate
5707 it.
5709 Entries already pointing to SOURCE and unavailable entries are
5710 removed beforehand. Return the new stack."
5716 "Menu for asynchronous export results and running processes."
5726 "Return source from export results at point in stack."
5733 source
5734 ;; SOURCE is not consistent with current line. The stack
5735 ;; view is outdated.
5739 "Remove all entries from export stack."
5744 "Refresh the asynchronous export stack.
5745 DUMMY is ignored. Unavailable sources are removed from the list.
5746 Return the new stack."
5756 ;; Back-end.
5758 ;; Age.
5761 ;; Compute age of the results.
5763 "%4h:%.2m "
5765 ;; Source.
5770 ;; Clear stack from exited processes, dead buffers or
5771 ;; non-existent files.
5783 "Remove export results at point from stack.
5784 If optional argument SOURCE is non-nil, remove it instead."
5789 org-export-stack-contents))))
5792 "View export results at point in stack.
5793 With an optional prefix argument IN-EMACS, force viewing files
5794 within Emacs."
5808 (define-key km "p" 'previous-line)
5809 (define-key km "\C-p" 'previous-line)
5810 (define-key km "\C-?" 'previous-line)
5811 (define-key km [up] 'previous-line)
5812 (define-key km "C" 'org-export-stack-clear)
5813 (define-key km "v" 'org-export-stack-view)
5814 (define-key km (kbd "RET") 'org-export-stack-view)
5815 (define-key km "d" 'org-export-stack-remove)
5816 km)
5817 "Keymap for Org Export Stack.")
5819 (define-derived-mode org-export-stack-mode special-mode "Org-Stack"
5820 "Mode for displaying asynchronous export stack.
5823 stack.
5825 In an Org Export Stack buffer, use \\<org-export-stack-mode-map>\\[org-export-stack-view] to view export output
5826 on current line, \\[org-export-stack-remove] to remove it from the stack and \\[org-export-stack-clear] to clear
5827 stack completely.
5829 Removing entries in an Org Export Stack buffer doesn't affect
5830 files or buffers, only the display.
5833 (abbrev-mode 0)
5834 (auto-fill-mode 0)
5835 (setq buffer-read-only t
5836 buffer-undo-list t
5837 truncate-lines t
5838 header-line-format
5839 '(:eval
5840 (format " %-12s | %6s | %s" "Back-End" "Age" "Source")))
5841 (org-add-hook 'post-command-hook 'org-export-stack-refresh nil t)
5842 (set (make-local-variable 'revert-buffer-function)
5843 'org-export-stack-refresh))
5846 \f
5847 ;;; The Dispatcher
5848 ;;
5849 ;; `org-export-dispatch' is the standard interactive way to start an
5850 ;; export process. It uses `org-export--dispatch-ui' as a subroutine
5851 ;; for its interface, which, in turn, delegates response to key
5852 ;; pressed to `org-export--dispatch-action'.
5854 ;;;###autoload
5855 (defun org-export-dispatch (&optional arg)
5856 "Export dispatcher for Org mode.
5858 It provides an access to common export related tasks in a buffer.
5859 Its interface comes in two flavours: standard and expert.
5861 While both share the same set of bindings, only the former
5862 displays the valid keys associations in a dedicated buffer.
5863 Scrolling (resp. line-wise motion) in this buffer is done with
5864 SPC and DEL (resp. C-n and C-p) keys.
5866 Set variable `org-export-dispatch-use-expert-ui' to switch to one
5867 flavour or the other.
5870 of options used back then, on the current buffer.
5872 When ARG is \\[universal-argument] \\[universal-argument], display the asynchronous export stack."
5873 (interactive "P")
5874 (let* ((input
5875 (cond ((equal arg '(16)) '(stack))
5876 ((and arg org-export-dispatch-last-action))
5877 (t (save-window-excursion
5878 (unwind-protect
5879 (progn
5880 ;; Remember where we are
5881 (move-marker org-export-dispatch-last-position
5882 (point)
5883 (org-base-buffer (current-buffer)))
5884 ;; Get and store an export command
5885 (setq org-export-dispatch-last-action
5886 (org-export--dispatch-ui
5887 (list org-export-initial-scope
5888 (and org-export-in-background 'async))
5889 nil
5890 org-export-dispatch-use-expert-ui)))
5891 (and (get-buffer "*Org Export Dispatcher*")
5892 (kill-buffer "*Org Export Dispatcher*")))))))
5893 (action (car input))
5894 (optns (cdr input)))
5895 (unless (memq 'subtree optns)
5896 (move-marker org-export-dispatch-last-position nil))
5897 (case action
5898 ;; First handle special hard-coded actions.
5899 (template (org-export-insert-default-template nil optns))
5900 (stack (org-export-stack))
5901 (publish-current-file
5902 (org-publish-current-file (memq 'force optns) (memq 'async optns)))
5903 (publish-current-project
5904 (org-publish-current-project (memq 'force optns) (memq 'async optns)))
5905 (publish-choose-project
5906 (org-publish (assoc (org-icompleting-read
5907 "Publish project: "
5908 org-publish-project-alist nil t)
5909 org-publish-project-alist)
5910 (memq 'force optns)
5911 (memq 'async optns)))
5912 (publish-all (org-publish-all (memq 'force optns) (memq 'async optns)))
5913 (otherwise
5914 (save-excursion
5915 (when arg
5916 ;; Repeating command, maybe move cursor to restore subtree
5917 ;; context.
5918 (if (eq (marker-buffer org-export-dispatch-last-position)
5919 (org-base-buffer (current-buffer)))
5920 (goto-char org-export-dispatch-last-position)
5921 ;; We are in a different buffer, forget position.
5922 (move-marker org-export-dispatch-last-position nil)))
5923 (funcall action
5924 ;; Return a symbol instead of a list to ease
5925 ;; asynchronous export macro use.
5926 (and (memq 'async optns) t)
5927 (and (memq 'subtree optns) t)
5928 (and (memq 'visible optns) t)
5929 (and (memq 'body optns) t)))))))
5931 (defun org-export--dispatch-ui (options first-key expertp)
5932 "Handle interface for `org-export-dispatch'.
5934 OPTIONS is a list containing current interactive options set for
5935 export. It can contain any of the following symbols:
5936 `body' toggles a body-only export
5937 `subtree' restricts export to current subtree
5938 `visible' restricts export to visible part of buffer.
5939 `force' force publishing files.
5940 `async' use asynchronous export process
5942 FIRST-KEY is the key pressed to select the first level menu. It
5943 is nil when this menu hasn't been selected yet.
5945 EXPERTP, when non-nil, triggers expert UI. In that case, no help
5946 buffer is provided, but indications about currently active
5947 options are given in the prompt. Moreover, \[?] allows to switch
5948 back to standard interface."
5949 (let* ((fontify-key
5950 (lambda (key &optional access-key)
5951 ;; Fontify KEY string. Optional argument ACCESS-KEY, when
5952 ;; non-nil is the required first-level key to activate
5953 ;; KEY. When its value is t, activate KEY independently
5954 ;; on the first key, if any. A nil value means KEY will
5955 ;; only be activated at first level.
5956 (if (or (eq access-key t) (eq access-key first-key))
5957 (org-propertize key 'face 'org-warning)
5958 key)))
5959 (fontify-value
5960 (lambda (value)
5961 ;; Fontify VALUE string.
5962 (org-propertize value 'face 'font-lock-variable-name-face)))
5963 ;; Prepare menu entries by extracting them from registered
5964 ;; back-ends and sorting them by access key and by ordinal,
5965 ;; if any.
5966 (entries
5967 (sort (sort (delq nil
5968 (mapcar 'org-export-backend-menu
5969 org-export--registered-backends))
5970 (lambda (a b)
5971 (let ((key-a (nth 1 a))
5972 (key-b (nth 1 b)))
5973 (cond ((and (numberp key-a) (numberp key-b))
5974 (< key-a key-b))
5975 ((numberp key-b) t)))))
5976 'car-less-than-car))
5977 ;; Compute a list of allowed keys based on the first key
5978 ;; pressed, if any. Some keys
5979 ;; (?^B, ?^V, ?^S, ?^F, ?^A, ?&, ?# and ?q) are always
5980 ;; available.
5981 (allowed-keys
5982 (nconc (list 2 22 19 6 1)
5983 (if (not first-key) (org-uniquify (mapcar 'car entries))
5984 (let (sub-menu)
5985 (dolist (entry entries (sort (mapcar 'car sub-menu) '<))
5986 (when (eq (car entry) first-key)
5987 (setq sub-menu (append (nth 2 entry) sub-menu))))))
5988 (cond ((eq first-key ?P) (list ?f ?p ?x ?a))
5989 ((not first-key) (list ?P)))
5990 (list ?& ?#)
5991 (when expertp (list ??))
5992 (list ?q)))
5993 ;; Build the help menu for standard UI.
5994 (help
5995 (unless expertp
5996 (concat
5997 ;; Options are hard-coded.
5998 (format "[%s] Body only: %s [%s] Visible only: %s
5999 \[%s] Export scope: %s [%s] Force publishing: %s
6001 (funcall fontify-key "C-b" t)
6002 (funcall fontify-value
6003 (if (memq 'body options) "On " "Off"))
6004 (funcall fontify-key "C-v" t)
6005 (funcall fontify-value
6006 (if (memq 'visible options) "On " "Off"))
6007 (funcall fontify-key "C-s" t)
6008 (funcall fontify-value
6009 (if (memq 'subtree options) "Subtree" "Buffer "))
6010 (funcall fontify-key "C-f" t)
6011 (funcall fontify-value
6012 (if (memq 'force options) "On " "Off"))
6013 (funcall fontify-key "C-a" t)
6014 (funcall fontify-value
6015 (if (memq 'async options) "On " "Off")))
6016 ;; Display registered back-end entries. When a key
6017 ;; appears for the second time, do not create another
6018 ;; entry, but append its sub-menu to existing menu.
6019 (let (last-key)
6020 (mapconcat
6021 (lambda (entry)
6022 (let ((top-key (car entry)))
6023 (concat
6024 (unless (eq top-key last-key)
6025 (setq last-key top-key)
6027 (funcall fontify-key (char-to-string top-key))
6028 (nth 1 entry)))
6029 (let ((sub-menu (nth 2 entry)))
6030 (unless (functionp sub-menu)
6031 ;; Split sub-menu into two columns.
6032 (let ((index -1))
6033 (concat
6034 (mapconcat
6035 (lambda (sub-entry)
6036 (incf index)
6037 (format
6038 (if (zerop (mod index 2)) " [%s] %-26s"
6040 (funcall fontify-key
6041 (char-to-string (car sub-entry))
6042 top-key)
6043 (nth 1 sub-entry)))
6044 sub-menu "")
6046 entries ""))
6047 ;; Publishing menu is hard-coded.
6049 [%s] Current file [%s] Current project
6051 (funcall fontify-key "P")
6052 (funcall fontify-key "f" ?P)
6053 (funcall fontify-key "p" ?P)
6054 (funcall fontify-key "x" ?P)
6055 (funcall fontify-key "a" ?P))
6057 (funcall fontify-key "&" t)
6058 (funcall fontify-key "#" t))
6059 (format "[%s] %s"
6060 (funcall fontify-key "q" t)
6061 (if first-key "Main menu" "Exit")))))
6062 ;; Build prompts for both standard and expert UI.
6063 (standard-prompt (unless expertp "Export command: "))
6064 (expert-prompt
6065 (when expertp
6066 (format
6067 "Export command (C-%s%s%s%s%s) [%s]: "
6068 (if (memq 'body options) (funcall fontify-key "b" t) "b")
6069 (if (memq 'visible options) (funcall fontify-key "v" t) "v")
6070 (if (memq 'subtree options) (funcall fontify-key "s" t) "s")
6071 (if (memq 'force options) (funcall fontify-key "f" t) "f")
6072 (if (memq 'async options) (funcall fontify-key "a" t) "a")
6073 (mapconcat (lambda (k)
6074 ;; Strip control characters.
6075 (unless (< k 27) (char-to-string k)))
6076 allowed-keys "")))))
6077 ;; With expert UI, just read key with a fancy prompt. In standard
6078 ;; UI, display an intrusive help buffer.
6079 (if expertp
6080 (org-export--dispatch-action
6081 expert-prompt allowed-keys entries options first-key expertp)
6082 ;; At first call, create frame layout in order to display menu.
6083 (unless (get-buffer "*Org Export Dispatcher*")
6084 (delete-other-windows)
6085 (org-switch-to-buffer-other-window
6086 (get-buffer-create "*Org Export Dispatcher*"))
6087 (setq cursor-type nil
6088 header-line-format "Use SPC, DEL, C-n or C-p to navigate.")
6089 ;; Make sure that invisible cursor will not highlight square
6090 ;; brackets.
6091 (set-syntax-table (copy-syntax-table))
6092 (modify-syntax-entry ?\[ "w"))
6093 ;; At this point, the buffer containing the menu exists and is
6094 ;; visible in the current window. So, refresh it.
6095 (with-current-buffer "*Org Export Dispatcher*"
6096 ;; Refresh help. Maintain display continuity by re-visiting
6097 ;; previous window position.
6098 (let ((pos (window-start)))
6099 (erase-buffer)
6100 (insert help)
6101 (set-window-start nil pos)))
6102 (org-fit-window-to-buffer)
6103 (org-export--dispatch-action
6104 standard-prompt allowed-keys entries options first-key expertp))))
6106 (defun org-export--dispatch-action
6107 (prompt allowed-keys entries options first-key expertp)
6108 "Read a character from command input and act accordingly.
6110 PROMPT is the displayed prompt, as a string. ALLOWED-KEYS is
6111 a list of characters available at a given step in the process.
6112 ENTRIES is a list of menu entries. OPTIONS, FIRST-KEY and
6113 EXPERTP are the same as defined in `org-export--dispatch-ui',
6114 which see.
6116 Toggle export options when required. Otherwise, return value is
6117 a list with action as CAR and a list of interactive export
6118 options as CDR."
6119 (let (key)
6120 ;; Scrolling: when in non-expert mode, act on motion keys (C-n,
6121 ;; C-p, SPC, DEL).
6122 (while (and (setq key (read-char-exclusive prompt))
6123 (not expertp)
6124 (memq key '(14 16 ?\s ?\d)))
6125 (case key
6126 (14 (if (not (pos-visible-in-window-p (point-max)))
6127 (ignore-errors (scroll-up 1))
6128 (message "End of buffer")
6129 (sit-for 1)))
6130 (16 (if (not (pos-visible-in-window-p (point-min)))
6131 (ignore-errors (scroll-down 1))
6132 (message "Beginning of buffer")
6133 (sit-for 1)))
6134 (?\s (if (not (pos-visible-in-window-p (point-max)))
6135 (scroll-up nil)
6136 (message "End of buffer")
6137 (sit-for 1)))
6138 (?\d (if (not (pos-visible-in-window-p (point-min)))
6139 (scroll-down nil)
6140 (message "Beginning of buffer")
6141 (sit-for 1)))))
6142 (cond
6143 ;; Ignore undefined associations.
6144 ((not (memq key allowed-keys))
6145 (ding)
6146 (unless expertp (message "Invalid key") (sit-for 1))
6147 (org-export--dispatch-ui options first-key expertp))
6148 ;; q key at first level aborts export. At second level, cancel
6149 ;; first key instead.
6150 ((eq key ?q) (if (not first-key) (error "Export aborted")
6151 (org-export--dispatch-ui options nil expertp)))
6152 ;; Help key: Switch back to standard interface if expert UI was
6153 ;; active.
6154 ((eq key ??) (org-export--dispatch-ui options first-key nil))
6155 ;; Send request for template insertion along with export scope.
6156 ((eq key ?#) (cons 'template (memq 'subtree options)))
6157 ;; Switch to asynchronous export stack.
6158 ((eq key ?&) '(stack))
6159 ;; Toggle options: C-b (2) C-v (22) C-s (19) C-f (6) C-a (1).
6160 ((memq key '(2 22 19 6 1))
6161 (org-export--dispatch-ui
6162 (let ((option (case key (2 'body) (22 'visible) (19 'subtree)
6163 (6 'force) (1 'async))))
6164 (if (memq option options) (remq option options)
6165 (cons option options)))
6166 first-key expertp))
6167 ;; Action selected: Send key and options back to
6168 ;; `org-export-dispatch'.
6169 ((or first-key (functionp (nth 2 (assq key entries))))
6170 (cons (cond
6171 ((not first-key) (nth 2 (assq key entries)))
6172 ;; Publishing actions are hard-coded. Send a special
6173 ;; signal to `org-export-dispatch'.
6174 ((eq first-key ?P)
6175 (case key
6176 (?f 'publish-current-file)
6177 (?p 'publish-current-project)
6178 (?x 'publish-choose-project)
6179 (?a 'publish-all)))
6180 ;; Return first action associated to FIRST-KEY + KEY
6181 ;; path. Indeed, derived backends can share the same
6182 ;; FIRST-KEY.
6183 (t (catch 'found
6184 (mapc (lambda (entry)
6185 (let ((match (assq key (nth 2 entry))))
6186 (when match (throw 'found (nth 2 match)))))
6187 (member (assq first-key entries) entries)))))
6188 options))
6189 ;; Otherwise, enter sub-menu.
6190 (t (org-export--dispatch-ui options key expertp)))))
6194 (provide 'ox)
6196 ;; Local variables:
6197 ;; generated-autoload-file: "org-loaddefs.el"
6198 ;; End:
6200 ;;; ox.el ends here