;;; org-export.el --- Generic Export Engine For Org ;; Copyright (C) 2012 Free Software Foundation, Inc. ;; Author: Nicolas Goaziou ;; Keywords: outlines, hypermedia, calendar, wp ;; This program is free software; you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation, either version 3 of the License, or ;; (at your option) any later version. ;; This program is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with this program. If not, see . ;;; Commentary: ;; ;; This library implements a generic export engine for Org, built on ;; its syntactical parser: Org Elements. ;; ;; Besides that parser, the generic exporter is made of three distinct ;; parts: ;; ;; - The communication channel consists in a property list, which is ;; created and updated during the process. Its use is to offer ;; every piece of information, would it be about initial environment ;; or contextual data, all in a single place. The exhaustive list ;; of properties is given in "The Communication Channel" section of ;; this file. ;; ;; - The transcoder walks the parse tree, ignores or treat as plain ;; text elements and objects according to export options, and ;; eventually calls back-end specific functions to do the real ;; transcoding, concatenating their return value along the way. ;; ;; - The filter system is activated at the very beginning and the very ;; end of the export process, and each time an element or an object ;; has been converted. It is the entry point to fine-tune standard ;; output from back-end transcoders. See "The Filter System" ;; section for more information. ;; ;; The core function is `org-export-as'. It returns the transcoded ;; buffer as a string. ;; ;; An export back-end is defined with `org-export-define-backend', ;; which sets one mandatory variable: his translation table. Its name ;; is always `org-BACKEND-translate-alist' where BACKEND stands for ;; the name chosen for the back-end. Its value is an alist whose keys ;; are elements and objects types and values translator functions. ;; See function's docstring for more information about translators. ;; ;; Optionally, `org-export-define-backend' can also support specific ;; buffer keywords, OPTION keyword's items and filters. Also refer to ;; function documentation for more information. ;; ;; If the new back-end shares most properties with another one, ;; `org-export-define-derived-backend' can be used to simplify the ;; process. ;; ;; Any back-end can define its own variables. Among them, those ;; customizable should belong to the `org-export-BACKEND' group. ;; ;; Tools for common tasks across back-ends are implemented in the ;; penultimate part of this file. A dispatcher for standard back-ends ;; is provided in the last one. ;;; Code: (eval-when-compile (require 'cl)) (require 'org-element) (declare-function org-e-ascii-export-as-ascii "org-e-ascii" (&optional subtreep visible-only body-only ext-plist)) (declare-function org-e-ascii-export-to-ascii "org-e-ascii" (&optional subtreep visible-only body-only ext-plist pub-dir)) (declare-function org-e-html-export-as-html "org-e-html" (&optional subtreep visible-only body-only ext-plist)) (declare-function org-e-html-export-to-html "org-e-html" (&optional subtreep visible-only body-only ext-plist pub-dir)) (declare-function org-e-latex-export-as-latex "org-e-latex" (&optional subtreep visible-only body-only ext-plist)) (declare-function org-e-latex-export-to-latex "org-e-latex" (&optional subtreep visible-only body-only ext-plist pub-dir)) (declare-function org-e-latex-export-to-pdf "org-e-latex" (&optional subtreep visible-only body-only ext-plist pub-dir)) (declare-function org-e-odt-export-to-odt "org-e-odt" (&optional subtreep visible-only body-only ext-plist pub-dir)) (declare-function org-e-publish "org-e-publish" (project &optional force)) (declare-function org-e-publish-all "org-e-publish" (&optional force)) (declare-function org-e-publish-current-file "org-e-publish" (&optional force)) (declare-function org-e-publish-current-project "org-e-publish" (&optional force)) (declare-function org-export-blocks-preprocess "org-exp-blocks") (defvar org-e-publish-project-alist) (defvar org-table-number-fraction) (defvar org-table-number-regexp) ;;; Internal Variables ;; ;; Among internal variables, the most important is ;; `org-export-options-alist'. This variable define the global export ;; options, shared between every exporter, and how they are acquired. (defconst org-export-max-depth 19 "Maximum nesting depth for headlines, counting from 0.") (defconst org-export-options-alist '((:author "AUTHOR" nil user-full-name t) (:creator "CREATOR" nil org-export-creator-string) (:date "DATE" nil nil t) (:description "DESCRIPTION" nil nil newline) (:email "EMAIL" nil user-mail-address t) (:exclude-tags "EXCLUDE_TAGS" nil org-export-exclude-tags split) (:headline-levels nil "H" org-export-headline-levels) (:keywords "KEYWORDS" nil nil space) (:language "LANGUAGE" nil org-export-default-language t) (:preserve-breaks nil "\\n" org-export-preserve-breaks) (:section-numbers nil "num" org-export-with-section-numbers) (:select-tags "SELECT_TAGS" nil org-export-select-tags split) (:time-stamp-file nil "timestamp" org-export-time-stamp-file) (:title "TITLE" nil nil space) (:with-archived-trees nil "arch" org-export-with-archived-trees) (:with-author nil "author" org-export-with-author) (:with-clocks nil "c" org-export-with-clocks) (:with-creator nil "creator" org-export-with-creator) (:with-drawers nil "d" org-export-with-drawers) (:with-email nil "email" org-export-with-email) (:with-emphasize nil "*" org-export-with-emphasize) (:with-entities nil "e" org-export-with-entities) (:with-fixed-width nil ":" org-export-with-fixed-width) (:with-footnotes nil "f" org-export-with-footnotes) (:with-inlinetasks nil "inline" org-export-with-inlinetasks) (:with-plannings nil "p" org-export-with-planning) (:with-priority nil "pri" org-export-with-priority) (:with-special-strings nil "-" org-export-with-special-strings) (:with-statistics-cookies nil "stat" org-export-with-statistics-cookies) (:with-sub-superscript nil "^" org-export-with-sub-superscripts) (:with-toc nil "toc" org-export-with-toc) (:with-tables nil "|" org-export-with-tables) (:with-tags nil "tags" org-export-with-tags) (:with-tasks nil "tasks" org-export-with-tasks) (:with-timestamps nil "<" org-export-with-timestamps) (:with-todo-keywords nil "todo" org-export-with-todo-keywords)) "Alist between export properties and ways to set them. The CAR of the alist is the property name, and the CDR is a list like (KEYWORD OPTION DEFAULT BEHAVIOUR) where: KEYWORD is a string representing a buffer keyword, or nil. Each property defined this way can also be set, during subtree export, through an headline property named after the keyword with the \"EXPORT_\" prefix (i.e. DATE keyword and EXPORT_DATE property). OPTION is a string that could be found in an #+OPTIONS: line. DEFAULT is the default value for the property. BEHAVIOUR determine how Org should handle multiple keywords for the same property. It is a symbol among: nil Keep old value and discard the new one. t Replace old value with the new one. `space' Concatenate the values, separating them with a space. `newline' Concatenate the values, separating them with a newline. `split' Split values at white spaces, and cons them to the previous list. KEYWORD and OPTION have precedence over DEFAULT. All these properties should be back-end agnostic. Back-end specific properties are set through `org-export-define-backend'. Properties redefined there have precedence over these.") (defconst org-export-special-keywords '("SETUP_FILE" "OPTIONS") "List of in-buffer keywords that require special treatment. These keywords are not directly associated to a property. The way they are handled must be hard-coded into `org-export--get-inbuffer-options' function.") (defconst org-export-filters-alist '((:filter-bold . org-export-filter-bold-functions) (:filter-babel-call . org-export-filter-babel-call-functions) (:filter-center-block . org-export-filter-center-block-functions) (:filter-clock . org-export-filter-clock-functions) (:filter-code . org-export-filter-code-functions) (:filter-comment . org-export-filter-comment-functions) (:filter-comment-block . org-export-filter-comment-block-functions) (:filter-drawer . org-export-filter-drawer-functions) (:filter-dynamic-block . org-export-filter-dynamic-block-functions) (:filter-entity . org-export-filter-entity-functions) (:filter-example-block . org-export-filter-example-block-functions) (:filter-export-block . org-export-filter-export-block-functions) (:filter-export-snippet . org-export-filter-export-snippet-functions) (:filter-final-output . org-export-filter-final-output-functions) (:filter-fixed-width . org-export-filter-fixed-width-functions) (:filter-footnote-definition . org-export-filter-footnote-definition-functions) (:filter-footnote-reference . org-export-filter-footnote-reference-functions) (:filter-headline . org-export-filter-headline-functions) (:filter-horizontal-rule . org-export-filter-horizontal-rule-functions) (:filter-inline-babel-call . org-export-filter-inline-babel-call-functions) (:filter-inline-src-block . org-export-filter-inline-src-block-functions) (:filter-inlinetask . org-export-filter-inlinetask-functions) (:filter-italic . org-export-filter-italic-functions) (:filter-item . org-export-filter-item-functions) (:filter-keyword . org-export-filter-keyword-functions) (:filter-latex-environment . org-export-filter-latex-environment-functions) (:filter-latex-fragment . org-export-filter-latex-fragment-functions) (:filter-line-break . org-export-filter-line-break-functions) (:filter-link . org-export-filter-link-functions) (:filter-macro . org-export-filter-macro-functions) (:filter-node-property . org-export-filter-node-property-functions) (:filter-paragraph . org-export-filter-paragraph-functions) (:filter-parse-tree . org-export-filter-parse-tree-functions) (:filter-plain-list . org-export-filter-plain-list-functions) (:filter-plain-text . org-export-filter-plain-text-functions) (:filter-planning . org-export-filter-planning-functions) (:filter-property-drawer . org-export-filter-property-drawer-functions) (:filter-quote-block . org-export-filter-quote-block-functions) (:filter-quote-section . org-export-filter-quote-section-functions) (:filter-radio-target . org-export-filter-radio-target-functions) (:filter-section . org-export-filter-section-functions) (:filter-special-block . org-export-filter-special-block-functions) (:filter-src-block . org-export-filter-src-block-functions) (:filter-statistics-cookie . org-export-filter-statistics-cookie-functions) (:filter-strike-through . org-export-filter-strike-through-functions) (:filter-subscript . org-export-filter-subscript-functions) (:filter-superscript . org-export-filter-superscript-functions) (:filter-table . org-export-filter-table-functions) (:filter-table-cell . org-export-filter-table-cell-functions) (:filter-table-row . org-export-filter-table-row-functions) (:filter-target . org-export-filter-target-functions) (:filter-timestamp . org-export-filter-timestamp-functions) (:filter-underline . org-export-filter-underline-functions) (:filter-verbatim . org-export-filter-verbatim-functions) (:filter-verse-block . org-export-filter-verse-block-functions)) "Alist between filters properties and initial values. The key of each association is a property name accessible through the communication channel. Its value is a configurable global variable defining initial filters. This list is meant to install user specified filters. Back-end developers may install their own filters using `org-export-define-backend'. Filters defined there will always be prepended to the current list, so they always get applied first.") (defconst org-export-default-inline-image-rule `(("file" . ,(format "\\.%s\\'" (regexp-opt '("png" "jpeg" "jpg" "gif" "tiff" "tif" "xbm" "xpm" "pbm" "pgm" "ppm") t)))) "Default rule for link matching an inline image. This rule applies to links with no description. By default, it will be considered as an inline image if it targets a local file whose extension is either \"png\", \"jpeg\", \"jpg\", \"gif\", \"tiff\", \"tif\", \"xbm\", \"xpm\", \"pbm\", \"pgm\" or \"ppm\". See `org-export-inline-image-p' for more information about rules.") ;;; User-configurable Variables ;; ;; Configuration for the masses. ;; ;; They should never be accessed directly, as their value is to be ;; stored in a property list (cf. `org-export-options-alist'). ;; Back-ends will read their value from there instead. (defgroup org-export nil "Options for exporting Org mode files." :tag "Org Export" :group 'org) (defgroup org-export-general nil "General options for export engine." :tag "Org Export General" :group 'org-export) (defcustom org-export-with-archived-trees 'headline "Whether sub-trees with the ARCHIVE tag should be exported. This can have three different values: nil Do not export, pretend this tree is not present. t Do export the entire tree. `headline' Only export the headline, but skip the tree below it. This option can also be set with the #+OPTIONS line, e.g. \"arch:nil\"." :group 'org-export-general :type '(choice (const :tag "Not at all" nil) (const :tag "Headline only" 'headline) (const :tag "Entirely" t))) (defcustom org-export-with-author t "Non-nil means insert author name into the exported file. This option can also be set with the #+OPTIONS line, e.g. \"author:nil\"." :group 'org-export-general :type 'boolean) (defcustom org-export-with-clocks nil "Non-nil means export CLOCK keywords. This option can also be set with the #+OPTIONS line, e.g. \"c:t\"." :group 'org-export-general :type 'boolean) (defcustom org-export-with-creator 'comment "Non-nil means the postamble should contain a creator sentence. The sentence can be set in `org-export-creator-string' and defaults to \"Generated by Org mode XX in Emacs XXX.\". If the value is `comment' insert it as a comment." :group 'org-export-general :type '(choice (const :tag "No creator sentence" nil) (const :tag "Sentence as a comment" 'comment) (const :tag "Insert the sentence" t))) (defcustom org-export-creator-string (format "Generated by Org mode %s in Emacs %s." (if (fboundp 'org-version) (org-version) "(Unknown)") emacs-version) "String to insert at the end of the generated document." :group 'org-export-general :type '(string :tag "Creator string")) (defcustom org-export-with-drawers t "Non-nil means export contents of standard drawers. When t, all drawers are exported. This may also be a list of drawer names to export. This variable doesn't apply to properties drawers. This option can also be set with the #+OPTIONS line, e.g. \"d:nil\"." :group 'org-export-general :type '(choice (const :tag "All drawers" t) (const :tag "None" nil) (repeat :tag "Selected drawers" (string :tag "Drawer name")))) (defcustom org-export-with-email nil "Non-nil means insert author email into the exported file. This option can also be set with the #+OPTIONS line, e.g. \"email:t\"." :group 'org-export-general :type 'boolean) (defcustom org-export-with-emphasize t "Non-nil means interpret *word*, /word/, and _word_ as emphasized text. If the export target supports emphasizing text, the word will be typeset in bold, italic, or underlined, respectively. Not all export backends support this. This option can also be set with the #+OPTIONS line, e.g. \"*:nil\"." :group 'org-export-general :type 'boolean) (defcustom org-export-exclude-tags '("noexport") "Tags that exclude a tree from export. All trees carrying any of these tags will be excluded from export. This is without condition, so even subtrees inside that carry one of the `org-export-select-tags' will be removed. This option can also be set with the #+EXCLUDE_TAGS: keyword." :group 'org-export-general :type '(repeat (string :tag "Tag"))) (defcustom org-export-with-fixed-width t "Non-nil means lines starting with \":\" will be in fixed width font. This can be used to have pre-formatted text, fragments of code etc. For example: : ;; Some Lisp examples : (while (defc cnt) : (ding)) will be looking just like this in also HTML. See also the QUOTE keyword. Not all export backends support this. This option can also be set with the #+OPTIONS line, e.g. \"::nil\"." :group 'org-export-translation :type 'boolean) (defcustom org-export-with-footnotes t "Non-nil means Org footnotes should be exported. This option can also be set with the #+OPTIONS line, e.g. \"f:nil\"." :group 'org-export-general :type 'boolean) (defcustom org-export-headline-levels 3 "The last level which is still exported as a headline. Inferior levels will produce itemize lists when exported. This option can also be set with the #+OPTIONS line, e.g. \"H:2\"." :group 'org-export-general :type 'integer) (defcustom org-export-default-language "en" "The default language for export and clocktable translations, as a string. This may have an association in `org-clock-clocktable-language-setup'." :group 'org-export-general :type '(string :tag "Language")) (defcustom org-export-preserve-breaks nil "Non-nil means preserve all line breaks when exporting. Normally, in HTML output paragraphs will be reformatted. This option can also be set with the #+OPTIONS line, e.g. \"\\n:t\"." :group 'org-export-general :type 'boolean) (defcustom org-export-with-entities t "Non-nil means interpret entities when exporting. For example, HTML export converts \\alpha to α and \\AA to Å. For a list of supported names, see the constant `org-entities' and the user option `org-entities-user'. This option can also be set with the #+OPTIONS line, e.g. \"e:nil\"." :group 'org-export-general :type 'boolean) (defcustom org-export-with-inlinetasks t "Non-nil means inlinetasks should be exported. This option can also be set with the #+OPTIONS line, e.g. \"inline:nil\"." :group 'org-export-general :type 'boolean) (defcustom org-export-with-planning nil "Non-nil means include planning info in export. This option can also be set with the #+OPTIONS: line, e.g. \"p:t\"." :group 'org-export-general :type 'boolean) (defcustom org-export-with-priority nil "Non-nil means include priority cookies in export. This option can also be set with the #+OPTIONS line, e.g. \"pri:t\"." :group 'org-export-general :type 'boolean) (defcustom org-export-with-section-numbers t "Non-nil means add section numbers to headlines when exporting. When set to an integer n, numbering will only happen for headlines whose relative level is higher or equal to n. This option can also be set with the #+OPTIONS line, e.g. \"num:t\"." :group 'org-export-general :type 'boolean) (defcustom org-export-select-tags '("export") "Tags that select a tree for export. If any such tag is found in a buffer, all trees that do not carry one of these tags will be ignored during export. Inside trees that are selected like this, you can still deselect a subtree by tagging it with one of the `org-export-exclude-tags'. This option can also be set with the #+SELECT_TAGS: keyword." :group 'org-export-general :type '(repeat (string :tag "Tag"))) (defcustom org-export-with-special-strings t "Non-nil means interpret \"\\-\", \"--\" and \"---\" for export. When this option is turned on, these strings will be exported as: Org HTML LaTeX UTF-8 -----+----------+--------+------- \\- ­ \\- -- – -- – --- — --- — ... … \\ldots … This option can also be set with the #+OPTIONS line, e.g. \"-:nil\"." :group 'org-export-general :type 'boolean) (defcustom org-export-with-statistics-cookies t "Non-nil means include statistics cookies in export. This option can also be set with the #+OPTIONS: line, e.g. \"stat:nil\"" :group 'org-export-general :type 'boolean) (defcustom org-export-with-sub-superscripts t "Non-nil means interpret \"_\" and \"^\" for export. When this option is turned on, you can use TeX-like syntax for sub- and superscripts. Several characters after \"_\" or \"^\" will be considered as a single item - so grouping with {} is normally not needed. For example, the following things will be parsed as single sub- or superscripts. 10^24 or 10^tau several digits will be considered 1 item. 10^-12 or 10^-tau a leading sign with digits or a word x^2-y^3 will be read as x^2 - y^3, because items are terminated by almost any nonword/nondigit char. x_{i^2} or x^(2-i) braces or parenthesis do grouping. Still, ambiguity is possible - so when in doubt use {} to enclose the sub/superscript. If you set this variable to the symbol `{}', the braces are *required* in order to trigger interpretations as sub/superscript. This can be helpful in documents that need \"_\" frequently in plain text. This option can also be set with the #+OPTIONS line, e.g. \"^:nil\"." :group 'org-export-general :type '(choice (const :tag "Interpret them" t) (const :tag "Curly brackets only" {}) (const :tag "Do not interpret them" nil))) (defcustom org-export-with-toc t "Non-nil means create a table of contents in exported files. The TOC contains headlines with levels up to`org-export-headline-levels'. When an integer, include levels up to N in the toc, this may then be different from `org-export-headline-levels', but it will not be allowed to be larger than the number of headline levels. When nil, no table of contents is made. This option can also be set with the #+OPTIONS line, e.g. \"toc:nil\" or \"toc:3\"." :group 'org-export-general :type '(choice (const :tag "No Table of Contents" nil) (const :tag "Full Table of Contents" t) (integer :tag "TOC to level"))) (defcustom org-export-with-tables t "If non-nil, lines starting with \"|\" define a table. For example: | Name | Address | Birthday | |-------------+----------+-----------| | Arthur Dent | England | 29.2.2100 | This option can also be set with the #+OPTIONS line, e.g. \"|:nil\"." :group 'org-export-general :type 'boolean) (defcustom org-export-with-tags t "If nil, do not export tags, just remove them from headlines. If this is the symbol `not-in-toc', tags will be removed from table of contents entries, but still be shown in the headlines of the document. This option can also be set with the #+OPTIONS line, e.g. \"tags:nil\"." :group 'org-export-general :type '(choice (const :tag "Off" nil) (const :tag "Not in TOC" not-in-toc) (const :tag "On" t))) (defcustom org-export-with-tasks t "Non-nil means include TODO items for export. This may have the following values: t include tasks independent of state. todo include only tasks that are not yet done. done include only tasks that are already done. nil remove all tasks before export list of keywords keep only tasks with these keywords" :group 'org-export-general :type '(choice (const :tag "All tasks" t) (const :tag "No tasks" nil) (const :tag "Not-done tasks" todo) (const :tag "Only done tasks" done) (repeat :tag "Specific TODO keywords" (string :tag "Keyword")))) (defcustom org-export-time-stamp-file t "Non-nil means insert a time stamp into the exported file. The time stamp shows when the file was created. This option can also be set with the #+OPTIONS line, e.g. \"timestamp:nil\"." :group 'org-export-general :type 'boolean) (defcustom org-export-with-timestamps t "Non nil means allow timestamps in export. It can be set to `active', `inactive', t or nil, in order to export, respectively, only active timestamps, only inactive ones, all of them or none. This option can also be set with the #+OPTIONS line, e.g. \"<:nil\"." :group 'org-export-general :type '(choice (const :tag "All timestamps" t) (const :tag "Only active timestamps" active) (const :tag "Only inactive timestamps" inactive) (const :tag "No timestamp" nil))) (defcustom org-export-with-todo-keywords t "Non-nil means include TODO keywords in export. When nil, remove all these keywords from the export." :group 'org-export-general :type 'boolean) (defcustom org-export-allow-BIND 'confirm "Non-nil means allow #+BIND to define local variable values for export. This is a potential security risk, which is why the user must confirm the use of these lines." :group 'org-export-general :type '(choice (const :tag "Never" nil) (const :tag "Always" t) (const :tag "Ask a confirmation for each file" confirm))) (defcustom org-export-snippet-translation-alist nil "Alist between export snippets back-ends and exporter back-ends. This variable allows to provide shortcuts for export snippets. For example, with a value of '\(\(\"h\" . \"e-html\"\)\), the HTML back-end will recognize the contents of \"@@h:@@\" as HTML code while every other back-end will ignore it." :group 'org-export-general :type '(repeat (cons (string :tag "Shortcut") (string :tag "Back-end")))) (defcustom org-export-coding-system nil "Coding system for the exported file." :group 'org-export-general :type 'coding-system) (defcustom org-export-copy-to-kill-ring t "Non-nil means exported stuff will also be pushed onto the kill ring." :group 'org-export-general :type 'boolean) (defcustom org-export-initial-scope 'buffer "The initial scope when exporting with `org-export-dispatch'. This variable can be either set to `buffer' or `subtree'." :group 'org-export-general :type '(choice (const :tag "Export current buffer" 'buffer) (const :tag "Export current subtree" 'subtree))) (defcustom org-export-show-temporary-export-buffer t "Non-nil means show buffer after exporting to temp buffer. When Org exports to a file, the buffer visiting that file is ever shown, but remains buried. However, when exporting to a temporary buffer, that buffer is popped up in a second window. When this variable is nil, the buffer remains buried also in these cases." :group 'org-export-general :type 'boolean) (defcustom org-export-dispatch-use-expert-ui nil "Non-nil means using a non-intrusive `org-export-dispatch'. In that case, no help buffer is displayed. Though, an indicator for current export scope is added to the prompt \(i.e. \"b\" when output is restricted to body only, \"s\" when it is restricted to the current subtree and \"v\" when only visible elements are considered for export\). Also, \[?] allows to switch back to standard mode." :group 'org-export-general :type 'boolean) ;;; Defining New Back-ends ;; ;; `org-export-define-backend' is the standard way to define an export ;; back-end. It allows to specify translators, filters, buffer ;; options and a menu entry. If the new back-end shares translators ;; with another back-end, `org-export-define-derived-backend' may be ;; used instead. ;; ;; Eventually `org-export-barf-if-invalid-backend' returns an error ;; when a given back-end hasn't been registered yet. (defmacro org-export-define-backend (backend translators &rest body) "Define a new back-end BACKEND. TRANSLATORS is an alist between object or element types and functions handling them. These functions should return a string without any trailing space, or nil. They must accept three arguments: the object or element itself, its contents or nil when it isn't recursive and the property list used as a communication channel. Contents, when not nil, are stripped from any global indentation \(although the relative one is preserved). They also always end with a single newline character. If, for a given type, no function is found, that element or object type will simply be ignored, along with any blank line or white space at its end. The same will happen if the function returns the nil value. If that function returns the empty string, the type will be ignored, but the blank lines or white spaces will be kept. In addition to element and object types, one function can be associated to the `template' symbol and another one to the `plain-text' symbol. The former returns the final transcoded string, and can be used to add a preamble and a postamble to document's body. It must accept two arguments: the transcoded string and the property list containing export options. The latter, when defined, is to be called on every text not recognized as an element or an object. It must accept two arguments: the text string and the information channel. It is an appropriate place to protect special chars relative to the back-end. BODY can start with pre-defined keyword arguments. The following keywords are understood: :export-block String, or list of strings, representing block names that will not be parsed. This is used to specify blocks that will contain raw code specific to the back-end. These blocks still have to be handled by the relative `export-block' type translator. :filters-alist Alist between filters and function, or list of functions, specific to the back-end. See `org-export-filters-alist' for a list of all allowed filters. Filters defined here shouldn't make a back-end test, as it may prevent back-ends derived from this one to behave properly. :menu-entry Menu entry for the export dispatcher. It should be a list like: \(KEY DESCRIPTION ACTION-OR-MENU) where : KEY is a free character selecting the back-end. DESCRIPTION is a string naming the back-end. ACTION-OR-MENU is either a function or an alist. If it is an action, it will be called with three arguments: SUBTREEP, VISIBLE-ONLY and BODY-ONLY. See `org-export-as' for further explanations. If it is an alist, associations should follow the pattern: \(KEY DESCRIPTION ACTION) where KEY, DESCRIPTION and ACTION are described above. Valid values include: \(?m \"My Special Back-end\" my-special-export-function) or \(?l \"Export to LaTeX\" \((?b \"TEX (buffer)\" org-e-latex-export-as-latex) \(?l \"TEX (file)\" org-e-latex-export-to-latex) \(?p \"PDF file\" org-e-latex-export-to-pdf) \(?o \"PDF file and open\" \(lambda (subtree visible body-only) \(org-open-file \(org-e-latex-export-to-pdf subtree visible body-only)))))) :options-alist Alist between back-end specific properties introduced in communication channel and how their value are acquired. See `org-export-options-alist' for more information about structure of the values." (declare (debug (&define name sexp [&rest [keywordp sexp]] defbody)) (indent 1)) (let (export-block filters menu-entry options) (while (keywordp (car body)) (case (pop body) (:export-block (let ((names (pop body))) (setq export-block (if (consp names) (mapcar 'upcase names) (list (upcase names)))))) (:filters-alist (setq filters (pop body))) (:menu-entry (setq menu-entry (pop body))) (:options-alist (setq options (pop body))) (t (pop body)))) `(progn ;; Define translators. (defvar ,(intern (format "org-%s-translate-alist" backend)) ',translators "Alist between element or object types and translators.") ;; Define options. ,(when options `(defconst ,(intern (format "org-%s-options-alist" backend)) ',options ,(format "Alist between %s export properties and ways to set them. See `org-export-options-alist' for more information on the structure of the values." backend))) ;; Define filters. ,(when filters `(defconst ,(intern (format "org-%s-filters-alist" backend)) ',filters "Alist between filters keywords and back-end specific filters. See `org-export-filters-alist' for more information.")) ;; Tell parser to not parse EXPORT-BLOCK blocks. ,(when export-block `(mapc (lambda (name) (add-to-list 'org-element-block-name-alist `(,name . org-element-export-block-parser))) ',export-block)) ;; Add an entry for back-end in `org-export-dispatch'. ,(when menu-entry (let ((menu (assq (car menu-entry) org-export-dispatch-menu-entries))) (unless menu `(push ',menu-entry org-export-dispatch-menu-entries)))) ;; Splice in the body, if any. ,@body))) (defmacro org-export-define-derived-backend (child parent &rest body) "Create a new back-end as a variant of an existing one. CHILD is the name of the derived back-end. PARENT is the name of the parent back-end. BODY can start with pre-defined keyword arguments. The following keywords are understood: :export-block String, or list of strings, representing block names that will not be parsed. This is used to specify blocks that will contain raw code specific to the back-end. These blocks still have to be handled by the relative `export-block' type translator. :filters-alist Alist of filters that will overwrite or complete filters defined in PARENT back-end. See `org-export-filters-alist' for a list of allowed filters. :menu-entry Menu entry for the export dispatcher. See `org-export-define-backend' for more information about the expected value. :options-alist Alist of back-end specific properties that will overwrite or complete those defined in PARENT back-end. Refer to `org-export-options-alist' for more information about structure of the values. :sub-menu-entry Append entries to an existing menu in the export dispatcher. The associated value should be a list whose CAR is the character selecting the menu to expand and CDR a list of entries following the pattern: \(KEY DESCRIPTION ACTION) where KEY is a free character triggering the action, DESCRIPTION is a string defining the action, and ACTION is a function that will be called with three arguments: SUBTREEP, VISIBLE-ONLY and BODY-ONLY. See `org-export-as' for further explanations. Valid values include: \(?l (?P \"As PDF file (Beamer)\" org-e-beamer-export-to-pdf) \(?O \"As PDF file and open (Beamer)\" \(lambda (s v b) \(org-open-file (org-e-beamer-export-to-pdf s v b))))) :translate-alist Alist of element and object types and transcoders that will overwrite or complete transcode table from PARENT back-end. Refer to `org-export-define-backend' for detailed information about transcoders. As an example, here is how one could define \"my-latex\" back-end as a variant of `e-latex' back-end with a custom template function: \(org-export-define-derived-backend my-latex e-latex :translate-alist ((template . my-latex-template-fun))) The back-end could then be called with, for example: \(org-export-to-buffer 'my-latex \"*Test my-latex*\")" (declare (debug (&define name sexp [&rest [keywordp sexp]] def-body)) (indent 2)) (let (export-block filters menu-entry options sub-menu-entry translate) (while (keywordp (car body)) (case (pop body) (:export-block (let ((names (pop body))) (setq export-block (if (consp names) (mapcar 'upcase names) (list (upcase names)))))) (:filters-alist (setq filters (pop body))) (:menu-entry (setq menu-entry (pop body))) (:options-alist (setq options (pop body))) (:sub-menu-entry (setq sub-menu-entry (pop body))) (:translate-alist (setq translate (pop body))) (t (pop body)))) `(progn ;; Tell parser to not parse EXPORT-BLOCK blocks. ,(when export-block `(mapc (lambda (name) (add-to-list 'org-element-block-name-alist `(,name . org-element-export-block-parser))) ',export-block)) ;; Define filters. ,(let ((parent-filters (intern (format "org-%s-filters-alist" parent)))) (when (or (boundp parent-filters) filters) `(defconst ,(intern (format "org-%s-filters-alist" child)) ',(append filters (and (boundp parent-filters) (copy-sequence (symbol-value parent-filters)))) "Alist between filters keywords and back-end specific filters. See `org-export-filters-alist' for more information."))) ;; Define options. ,(let ((parent-options (intern (format "org-%s-options-alist" parent)))) (when (or (boundp parent-options) options) `(defconst ,(intern (format "org-%s-options-alist" child)) ',(append options (and (boundp parent-options) (copy-sequence (symbol-value parent-options)))) ,(format "Alist between %s export properties and ways to set them. See `org-export-options-alist' for more information on the structure of the values." child)))) ;; Define translators. (defvar ,(intern (format "org-%s-translate-alist" child)) ',(append translate (copy-sequence (symbol-value (intern (format "org-%s-translate-alist" parent))))) "Alist between element or object types and translators.") ;; Add an entry for back-end in `org-export-dispatch'. ,(when menu-entry (let ((menu (assq (car menu-entry) org-export-dispatch-menu-entries))) (unless menu `(push ',menu-entry org-export-dispatch-menu-entries)))) ,(when sub-menu-entry (let ((menu (nth 2 (assq (car sub-menu-entry) org-export-dispatch-menu-entries)))) (when menu `(nconc ',menu ',(org-remove-if (lambda (e) (member e menu)) (cdr sub-menu-entry)))))) ;; Splice in the body, if any. ,@body))) (defun org-export-barf-if-invalid-backend (backend) "Signal an error if BACKEND isn't defined." (unless (boundp (intern (format "org-%s-translate-alist" backend))) (error "Unknown \"%s\" back-end: Aborting export" backend))) ;;; The Communication Channel ;; ;; During export process, every function has access to a number of ;; properties. They are of two types: ;; ;; 1. Environment options are collected once at the very beginning of ;; the process, out of the original buffer and configuration. ;; Collecting them is handled by `org-export-get-environment' ;; function. ;; ;; Most environment options are defined through the ;; `org-export-options-alist' variable. ;; ;; 2. Tree properties are extracted directly from the parsed tree, ;; just before export, by `org-export-collect-tree-properties'. ;; ;; Here is the full list of properties available during transcode ;; process, with their category and their value type. ;; ;; + `:author' :: Author's name. ;; - category :: option ;; - type :: string ;; ;; + `:back-end' :: Current back-end used for transcoding. ;; - category :: tree ;; - type :: symbol ;; ;; + `:creator' :: String to write as creation information. ;; - category :: option ;; - type :: string ;; ;; + `:date' :: String to use as date. ;; - category :: option ;; - type :: string ;; ;; + `:description' :: Description text for the current data. ;; - category :: option ;; - type :: string ;; ;; + `:email' :: Author's email. ;; - category :: option ;; - type :: string ;; ;; + `:exclude-tags' :: Tags for exclusion of subtrees from export ;; process. ;; - category :: option ;; - type :: list of strings ;; ;; + `:exported-data' :: Hash table used for memoizing ;; `org-export-data'. ;; - category :: tree ;; - type :: hash table ;; ;; + `:footnote-definition-alist' :: Alist between footnote labels and ;; their definition, as parsed data. Only non-inlined footnotes ;; are represented in this alist. Also, every definition isn't ;; guaranteed to be referenced in the parse tree. The purpose of ;; this property is to preserve definitions from oblivion ;; (i.e. when the parse tree comes from a part of the original ;; buffer), it isn't meant for direct use in a back-end. To ;; retrieve a definition relative to a reference, use ;; `org-export-get-footnote-definition' instead. ;; - category :: option ;; - type :: alist (STRING . LIST) ;; ;; + `:headline-levels' :: Maximum level being exported as an ;; headline. Comparison is done with the relative level of ;; headlines in the parse tree, not necessarily with their ;; actual level. ;; - category :: option ;; - type :: integer ;; ;; + `:headline-offset' :: Difference between relative and real level ;; of headlines in the parse tree. For example, a value of -1 ;; means a level 2 headline should be considered as level ;; 1 (cf. `org-export-get-relative-level'). ;; - category :: tree ;; - type :: integer ;; ;; + `:headline-numbering' :: Alist between headlines and their ;; numbering, as a list of numbers ;; (cf. `org-export-get-headline-number'). ;; - category :: tree ;; - type :: alist (INTEGER . LIST) ;; ;; + `:id-alist' :: Alist between ID strings and destination file's ;; path, relative to current directory. It is used by ;; `org-export-resolve-id-link' to resolve ID links targeting an ;; external file. ;; - category :: option ;; - type :: alist (STRING . STRING) ;; ;; + `:ignore-list' :: List of elements and objects that should be ;; ignored during export. ;; - category :: tree ;; - type :: list of elements and objects ;; ;; + `:input-file' :: Full path to input file, if any. ;; - category :: option ;; - type :: string or nil ;; ;; + `:keywords' :: List of keywords attached to data. ;; - category :: option ;; - type :: string ;; ;; + `:language' :: Default language used for translations. ;; - category :: option ;; - type :: string ;; ;; + `:parse-tree' :: Whole parse tree, available at any time during ;; transcoding. ;; - category :: option ;; - type :: list (as returned by `org-element-parse-buffer') ;; ;; + `:preserve-breaks' :: Non-nil means transcoding should preserve ;; all line breaks. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:section-numbers' :: Non-nil means transcoding should add ;; section numbers to headlines. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:select-tags' :: List of tags enforcing inclusion of sub-trees ;; in transcoding. When such a tag is present, subtrees without ;; it are de facto excluded from the process. See ;; `use-select-tags'. ;; - category :: option ;; - type :: list of strings ;; ;; + `:target-list' :: List of targets encountered in the parse tree. ;; This is used to partly resolve "fuzzy" links ;; (cf. `org-export-resolve-fuzzy-link'). ;; - category :: tree ;; - type :: list of strings ;; ;; + `:time-stamp-file' :: Non-nil means transcoding should insert ;; a time stamp in the output. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:translate-alist' :: Alist between element and object types and ;; transcoding functions relative to the current back-end. ;; Special keys `template' and `plain-text' are also possible. ;; - category :: option ;; - type :: alist (SYMBOL . FUNCTION) ;; ;; + `:with-archived-trees' :: Non-nil when archived subtrees should ;; also be transcoded. If it is set to the `headline' symbol, ;; only the archived headline's name is retained. ;; - category :: option ;; - type :: symbol (nil, t, `headline') ;; ;; + `:with-author' :: Non-nil means author's name should be included ;; in the output. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:with-clocks' :: Non-nild means clock keywords should be exported. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:with-creator' :: Non-nild means a creation sentence should be ;; inserted at the end of the transcoded string. If the value ;; is `comment', it should be commented. ;; - category :: option ;; - type :: symbol (`comment', nil, t) ;; ;; + `:with-drawers' :: Non-nil means drawers should be exported. If ;; its value is a list of names, only drawers with such names ;; will be transcoded. ;; - category :: option ;; - type :: symbol (nil, t) or list of strings ;; ;; + `:with-email' :: Non-nil means output should contain author's ;; email. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:with-emphasize' :: Non-nil means emphasized text should be ;; interpreted. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:with-fixed-width' :: Non-nil if transcoder should interpret ;; strings starting with a colon as a fixed-with (verbatim) area. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:with-footnotes' :: Non-nil if transcoder should interpret ;; footnotes. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:with-plannings' :: Non-nil means transcoding should include ;; planning info. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:with-priority' :: Non-nil means transcoding should include ;; priority cookies. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:with-special-strings' :: Non-nil means transcoding should ;; interpret special strings in plain text. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:with-sub-superscript' :: Non-nil means transcoding should ;; interpret subscript and superscript. With a value of "{}", ;; only interpret those using curly brackets. ;; - category :: option ;; - type :: symbol (nil, {}, t) ;; ;; + `:with-tables' :: Non-nil means transcoding should interpret ;; tables. ;; - category :: option ;; - type :: symbol (nil, t) ;; ;; + `:with-tags' :: Non-nil means transcoding should keep tags in ;; headlines. A `not-in-toc' value will remove them from the ;; table of contents, if any, nonetheless. ;; - category :: option ;; - type :: symbol (nil, t, `not-in-toc') ;; ;; + `:with-tasks' :: Non-nil means transcoding should include ;; headlines with a TODO keyword. A `todo' value will only ;; include headlines with a todo type keyword while a `done' ;; value will do the contrary. If a list of strings is provided, ;; only tasks with keywords belonging to that list will be kept. ;; - category :: option ;; - type :: symbol (t, todo, done, nil) or list of strings ;; ;; + `:with-timestamps' :: Non-nil means transcoding should include ;; time stamps. Special value `active' (resp. `inactive') ask to ;; export only active (resp. inactive) timestamps. Otherwise, ;; completely remove them. ;; - category :: option ;; - type :: symbol: (`active', `inactive', t, nil) ;; ;; + `:with-toc' :: Non-nil means that a table of contents has to be ;; added to the output. An integer value limits its depth. ;; - category :: option ;; - type :: symbol (nil, t or integer) ;; ;; + `:with-todo-keywords' :: Non-nil means transcoding should ;; include TODO keywords. ;; - category :: option ;; - type :: symbol (nil, t) ;;;; Environment Options ;; ;; Environment options encompass all parameters defined outside the ;; scope of the parsed data. They come from five sources, in ;; increasing precedence order: ;; ;; - Global variables, ;; - Buffer's attributes, ;; - Options keyword symbols, ;; - Buffer keywords, ;; - Subtree properties. ;; ;; The central internal function with regards to environment options ;; is `org-export-get-environment'. It updates global variables with ;; "#+BIND:" keywords, then retrieve and prioritize properties from ;; the different sources. ;; ;; The internal functions doing the retrieval are: ;; `org-export--get-global-options', ;; `org-export--get-buffer-attributes', ;; `org-export--parse-option-keyword', ;; `org-export--get-subtree-options' and ;; `org-export--get-inbuffer-options' ;; ;; Also, `org-export--confirm-letbind' and `org-export--install-letbind' ;; take care of the part relative to "#+BIND:" keywords. (defun org-export-get-environment (&optional backend subtreep ext-plist) "Collect export options from the current buffer. Optional argument BACKEND is a symbol specifying which back-end specific options to read, if any. When optional argument SUBTREEP is non-nil, assume the export is done against the current sub-tree. Third optional argument EXT-PLIST is a property list with external parameters overriding Org default settings, but still inferior to file-local settings." ;; First install #+BIND variables. (org-export--install-letbind-maybe) ;; Get and prioritize export options... (org-combine-plists ;; ... from global variables... (org-export--get-global-options backend) ;; ... from buffer's attributes... (org-export--get-buffer-attributes) ;; ... from an external property list... ext-plist ;; ... from in-buffer settings... (org-export--get-inbuffer-options backend (and buffer-file-name (org-remove-double-quotes buffer-file-name))) ;; ... and from subtree, when appropriate. (and subtreep (org-export--get-subtree-options backend)) ;; Eventually install back-end symbol and its translation table. `(:back-end ,backend :translate-alist ,(let ((trans-alist (intern (format "org-%s-translate-alist" backend)))) (when (boundp trans-alist) (symbol-value trans-alist)))))) (defun org-export--parse-option-keyword (options &optional backend) "Parse an OPTIONS line and return values as a plist. Optional argument BACKEND is a symbol specifying which back-end specific items to read, if any." (let* ((all (append org-export-options-alist (and backend (let ((var (intern (format "org-%s-options-alist" backend)))) (and (boundp var) (eval var)))))) ;; Build an alist between #+OPTION: item and property-name. (alist (delq nil (mapcar (lambda (e) (when (nth 2 e) (cons (regexp-quote (nth 2 e)) (car e)))) all))) plist) (mapc (lambda (e) (when (string-match (concat "\\(\\`\\|[ \t]\\)" (car e) ":\\(([^)\n]+)\\|[^ \t\n\r;,.]*\\)") options) (setq plist (plist-put plist (cdr e) (car (read-from-string (match-string 2 options))))))) alist) plist)) (defun org-export--get-subtree-options (&optional backend) "Get export options in subtree at point. Optional argument BACKEND is a symbol specifying back-end used for export. Return options as a plist." ;; For each buffer keyword, create an headline property setting the ;; same property in communication channel. The name for the property ;; is the keyword with "EXPORT_" appended to it. (org-with-wide-buffer (let (prop plist) ;; Make sure point is at an heading. (unless (org-at-heading-p) (org-back-to-heading t)) ;; Take care of EXPORT_TITLE. If it isn't defined, use headline's ;; title as its fallback value. (when (setq prop (progn (looking-at org-todo-line-regexp) (or (save-match-data (org-entry-get (point) "EXPORT_TITLE")) (org-match-string-no-properties 3)))) (setq plist (plist-put plist :title (org-element-parse-secondary-string prop (org-element-restriction 'keyword))))) ;; EXPORT_OPTIONS are parsed in a non-standard way. (when (setq prop (org-entry-get (point) "EXPORT_OPTIONS")) (setq plist (nconc plist (org-export--parse-option-keyword prop backend)))) ;; Handle other keywords. (let ((seen '("TITLE"))) (mapc (lambda (option) (let ((property (nth 1 option))) (when (and property (not (member property seen))) (let* ((subtree-prop (concat "EXPORT_" property)) ;; Export properties are not case-sensitive. (value (let ((case-fold-search t)) (org-entry-get (point) subtree-prop)))) (push property seen) (when value (setq plist (plist-put plist (car option) ;; Parse VALUE if required. (if (member property org-element-parsed-keywords) (org-element-parse-secondary-string value (org-element-restriction 'keyword)) value)))))))) ;; Also look for both general keywords and back-end specific ;; options if BACKEND is provided. (append (and backend (let ((var (intern (format "org-%s-options-alist" backend)))) (and (boundp var) (symbol-value var)))) org-export-options-alist))) ;; Return value. plist))) (defun org-export--get-inbuffer-options (&optional backend files) "Return current buffer export options, as a plist. Optional argument BACKEND, when non-nil, is a symbol specifying which back-end specific options should also be read in the process. Optional argument FILES is a list of setup files names read so far, used to avoid circular dependencies. Assume buffer is in Org mode. Narrowing, if any, is ignored." (org-with-wide-buffer (goto-char (point-min)) (let ((case-fold-search t) plist) ;; 1. Special keywords, as in `org-export-special-keywords'. (let ((special-re (format "^[ \t]*#\\+%s:" (regexp-opt org-export-special-keywords)))) (while (re-search-forward special-re nil t) (let ((element (org-element-at-point))) (when (eq (org-element-type element) 'keyword) (let* ((key (org-element-property :key element)) (val (org-element-property :value element)) (prop (cond ((string= key "SETUP_FILE") (let ((file (expand-file-name (org-remove-double-quotes (org-trim val))))) ;; Avoid circular dependencies. (unless (member file files) (with-temp-buffer (insert (org-file-contents file 'noerror)) (org-mode) (org-export--get-inbuffer-options backend (cons file files)))))) ((string= key "OPTIONS") (org-export--parse-option-keyword val backend))))) (setq plist (org-combine-plists plist prop))))))) ;; 2. Standard options, as in `org-export-options-alist'. (let* ((all (append org-export-options-alist ;; Also look for back-end specific options ;; if BACKEND is defined. (and backend (let ((var (intern (format "org-%s-options-alist" backend)))) (and (boundp var) (eval var)))))) ;; Build ALIST between keyword name and property name. (alist (delq nil (mapcar (lambda (e) (when (nth 1 e) (cons (nth 1 e) (car e)))) all))) ;; Build regexp matching all keywords associated to export ;; options. Note: the search is case insensitive. (opt-re (format "^[ \t]*#\\+%s:" (regexp-opt (delq nil (mapcar (lambda (e) (nth 1 e)) all)))))) (goto-char (point-min)) (while (re-search-forward opt-re nil t) (let ((element (org-element-at-point))) (when (eq (org-element-type element) 'keyword) (let* ((key (org-element-property :key element)) (val (org-element-property :value element)) (prop (cdr (assoc key alist))) (behaviour (nth 4 (assq prop all)))) (setq plist (plist-put plist prop ;; Handle value depending on specified BEHAVIOUR. (case behaviour (space (if (not (plist-get plist prop)) (org-trim val) (concat (plist-get plist prop) " " (org-trim val)))) (newline (org-trim (concat (plist-get plist prop) "\n" (org-trim val)))) (split `(,@(plist-get plist prop) ,@(org-split-string val))) ('t val) (otherwise (if (not (plist-member plist prop)) val (plist-get plist prop)))))))))) ;; Parse keywords specified in `org-element-parsed-keywords'. (mapc (lambda (key) (let* ((prop (cdr (assoc key alist))) (value (and prop (plist-get plist prop)))) (when (stringp value) (setq plist (plist-put plist prop (org-element-parse-secondary-string value (org-element-restriction 'keyword))))))) org-element-parsed-keywords)) ;; 3. Return final value. plist))) (defun org-export--get-buffer-attributes () "Return properties related to buffer attributes, as a plist." (let ((visited-file (buffer-file-name (buffer-base-buffer)))) (list ;; Store full path of input file name, or nil. For internal use. :input-file visited-file :title (or (and visited-file (file-name-sans-extension (file-name-nondirectory visited-file))) (buffer-name (buffer-base-buffer))) :footnote-definition-alist ;; Footnotes definitions must be collected in the original ;; buffer, as there's no insurance that they will still be in the ;; parse tree, due to possible narrowing. (let (alist) (org-with-wide-buffer (goto-char (point-min)) (while (re-search-forward org-footnote-definition-re nil t) (let ((def (org-footnote-at-definition-p))) (when def (org-skip-whitespace) (push (cons (car def) (save-restriction (narrow-to-region (point) (nth 2 def)) ;; Like `org-element-parse-buffer', but ;; makes sure the definition doesn't start ;; with a section element. (org-element--parse-elements (point-min) (point-max) nil nil nil nil (list 'org-data nil)))) alist)))) alist)) :id-alist ;; Collect id references. (let (alist) (org-with-wide-buffer (goto-char (point-min)) (while (re-search-forward "\\[\\[id:\\(\\S-+?\\)\\]\\(?:\\[.*?\\]\\)?\\]" nil t) (let* ((id (org-match-string-no-properties 1)) (file (org-id-find-id-file id))) (when file (push (cons id (file-relative-name file)) alist))))) alist)))) (defun org-export--get-global-options (&optional backend) "Return global export options as a plist. Optional argument BACKEND, if non-nil, is a symbol specifying which back-end specific export options should also be read in the process." (let ((all (append org-export-options-alist (and backend (let ((var (intern (format "org-%s-options-alist" backend)))) (and (boundp var) (symbol-value var)))))) ;; Output value. plist) (mapc (lambda (cell) (setq plist (plist-put plist (car cell) ;; Eval default value provided. If keyword is a member ;; of `org-element-parsed-keywords', parse it as ;; a secondary string before storing it. (let ((value (eval (nth 3 cell)))) (if (not (stringp value)) value (let ((keyword (nth 1 cell))) (if (not (member keyword org-element-parsed-keywords)) value (org-element-parse-secondary-string value (org-element-restriction 'keyword))))))))) all) ;; Return value. plist)) (defvar org-export--allow-BIND-local nil) (defun org-export--confirm-letbind () "Can we use #+BIND values during export? By default this will ask for confirmation by the user, to divert possible security risks." (cond ((not org-export-allow-BIND) nil) ((eq org-export-allow-BIND t) t) ((local-variable-p 'org-export--allow-BIND-local) org-export--allow-BIND-local) (t (org-set-local 'org-export--allow-BIND-local (yes-or-no-p "Allow BIND values in this buffer? "))))) (defun org-export--install-letbind-maybe () "Install the values from #+BIND lines as local variables. Variables must be installed before in-buffer options are retrieved." (let ((case-fold-search t) letbind pair) (org-with-wide-buffer (goto-char (point-min)) (while (re-search-forward "^[ \t]*#\\+BIND:" nil t) (let* ((element (org-element-at-point)) (value (org-element-property :value element))) (when (and (eq (org-element-type element) 'keyword) (not (equal value "")) (org-export--confirm-letbind)) (push (read (format "(%s)" value)) letbind))))) (dolist (pair (nreverse letbind)) (org-set-local (car pair) (nth 1 pair))))) ;;;; Tree Properties ;; ;; Tree properties are infromation extracted from parse tree. They ;; are initialized at the beginning of the transcoding process by ;; `org-export-collect-tree-properties'. ;; ;; Dedicated functions focus on computing the value of specific tree ;; properties during initialization. Thus, ;; `org-export--populate-ignore-list' lists elements and objects that ;; should be skipped during export, `org-export--get-min-level' gets ;; the minimal exportable level, used as a basis to compute relative ;; level for headlines. Eventually ;; `org-export--collect-headline-numbering' builds an alist between ;; headlines and their numbering. (defun org-export-collect-tree-properties (data info) "Extract tree properties from parse tree. DATA is the parse tree from which information is retrieved. INFO is a list holding export options. Following tree properties are set or updated: `:exported-data' Hash table used to memoize results from `org-export-data'. `:footnote-definition-alist' List of footnotes definitions in original buffer and current parse tree. `:headline-offset' Offset between true level of headlines and local level. An offset of -1 means an headline of level 2 should be considered as a level 1 headline in the context. `:headline-numbering' Alist of all headlines as key an the associated numbering as value. `:ignore-list' List of elements that should be ignored during export. `:target-list' List of all targets in the parse tree. Return updated plist." ;; Install the parse tree in the communication channel, in order to ;; use `org-export-get-genealogy' and al. (setq info (plist-put info :parse-tree data)) ;; Get the list of elements and objects to ignore, and put it into ;; `:ignore-list'. Do not overwrite any user ignore that might have ;; been done during parse tree filtering. (setq info (plist-put info :ignore-list (append (org-export--populate-ignore-list data info) (plist-get info :ignore-list)))) ;; Compute `:headline-offset' in order to be able to use ;; `org-export-get-relative-level'. (setq info (plist-put info :headline-offset (- 1 (org-export--get-min-level data info)))) ;; Update footnotes definitions list with definitions in parse tree. ;; This is required since buffer expansion might have modified ;; boundaries of footnote definitions contained in the parse tree. ;; This way, definitions in `footnote-definition-alist' are bound to ;; match those in the parse tree. (let ((defs (plist-get info :footnote-definition-alist))) (org-element-map data 'footnote-definition (lambda (fn) (push (cons (org-element-property :label fn) `(org-data nil ,@(org-element-contents fn))) defs))) (setq info (plist-put info :footnote-definition-alist defs))) ;; Properties order doesn't matter: get the rest of the tree ;; properties. (nconc `(:target-list ,(org-element-map data '(keyword target) (lambda (blob) (when (or (eq (org-element-type blob) 'target) (string= (org-element-property :key blob) "TARGET")) blob)) info) :headline-numbering ,(org-export--collect-headline-numbering data info) :exported-data ,(make-hash-table :test 'eq :size 4001)) info)) (defun org-export--get-min-level (data options) "Return minimum exportable headline's level in DATA. DATA is parsed tree as returned by `org-element-parse-buffer'. OPTIONS is a plist holding export options." (catch 'exit (let ((min-level 10000)) (mapc (lambda (blob) (when (and (eq (org-element-type blob) 'headline) (not (memq blob (plist-get options :ignore-list)))) (setq min-level (min (org-element-property :level blob) min-level))) (when (= min-level 1) (throw 'exit 1))) (org-element-contents data)) ;; If no headline was found, for the sake of consistency, set ;; minimum level to 1 nonetheless. (if (= min-level 10000) 1 min-level)))) (defun org-export--collect-headline-numbering (data options) "Return numbering of all exportable headlines in a parse tree. DATA is the parse tree. OPTIONS is the plist holding export options. Return an alist whose key is an headline and value is its associated numbering \(in the shape of a list of numbers\)." (let ((numbering (make-vector org-export-max-depth 0))) (org-element-map data 'headline (lambda (headline) (let ((relative-level (1- (org-export-get-relative-level headline options)))) (cons headline (loop for n across numbering for idx from 0 to org-export-max-depth when (< idx relative-level) collect n when (= idx relative-level) collect (aset numbering idx (1+ n)) when (> idx relative-level) do (aset numbering idx 0))))) options))) (defun org-export--populate-ignore-list (data options) "Return list of elements and objects to ignore during export. DATA is the parse tree to traverse. OPTIONS is the plist holding export options." (let* (ignore walk-data ;; First find trees containing a select tag, if any. (selected (org-export--selected-trees data options)) (walk-data (lambda (data) ;; Collect ignored elements or objects into IGNORE-LIST. (let ((type (org-element-type data))) (if (org-export--skip-p data options selected) (push data ignore) (if (and (eq type 'headline) (eq (plist-get options :with-archived-trees) 'headline) (org-element-property :archivedp data)) ;; If headline is archived but tree below has ;; to be skipped, add it to ignore list. (mapc (lambda (e) (push e ignore)) (org-element-contents data)) ;; Move into secondary string, if any. (let ((sec-prop (cdr (assq type org-element-secondary-value-alist)))) (when sec-prop (mapc walk-data (org-element-property sec-prop data)))) ;; Move into recursive objects/elements. (mapc walk-data (org-element-contents data)))))))) ;; Main call. (funcall walk-data data) ;; Return value. ignore)) (defun org-export--selected-trees (data info) "Return list of headlines containing a select tag in their tree. DATA is parsed data as returned by `org-element-parse-buffer'. INFO is a plist holding export options." (let* (selected-trees walk-data ; for byte-compiler. (walk-data (function (lambda (data genealogy) (case (org-element-type data) (org-data (mapc (lambda (el) (funcall walk-data el genealogy)) (org-element-contents data))) (headline (let ((tags (org-element-property :tags data))) (if (loop for tag in (plist-get info :select-tags) thereis (member tag tags)) ;; When a select tag is found, mark full ;; genealogy and every headline within the tree ;; as acceptable. (setq selected-trees (append genealogy (org-element-map data 'headline 'identity) selected-trees)) ;; Else, continue searching in tree, recursively. (mapc (lambda (el) (funcall walk-data el (cons data genealogy))) (org-element-contents data)))))))))) (funcall walk-data data nil) selected-trees)) (defun org-export--skip-p (blob options selected) "Non-nil when element or object BLOB should be skipped during export. OPTIONS is the plist holding export options. SELECTED, when non-nil, is a list of headlines belonging to a tree with a select tag." (case (org-element-type blob) (clock (not (plist-get options :with-clocks))) (drawer (or (not (plist-get options :with-drawers)) (and (consp (plist-get options :with-drawers)) (not (member (org-element-property :drawer-name blob) (plist-get options :with-drawers)))))) (headline (let ((with-tasks (plist-get options :with-tasks)) (todo (org-element-property :todo-keyword blob)) (todo-type (org-element-property :todo-type blob)) (archived (plist-get options :with-archived-trees)) (tags (org-element-property :tags blob))) (or ;; Ignore subtrees with an exclude tag. (loop for k in (plist-get options :exclude-tags) thereis (member k tags)) ;; When a select tag is present in the buffer, ignore any tree ;; without it. (and selected (not (memq blob selected))) ;; Ignore commented sub-trees. (org-element-property :commentedp blob) ;; Ignore archived subtrees if `:with-archived-trees' is nil. (and (not archived) (org-element-property :archivedp blob)) ;; Ignore tasks, if specified by `:with-tasks' property. (and todo (or (not with-tasks) (and (memq with-tasks '(todo done)) (not (eq todo-type with-tasks))) (and (consp with-tasks) (not (member todo with-tasks)))))))) (inlinetask (not (plist-get options :with-inlinetasks))) (planning (not (plist-get options :with-plannings))) (statistics-cookie (not (plist-get options :with-statistics-cookies))) (table-cell (and (org-export-table-has-special-column-p (org-export-get-parent-table blob)) (not (org-export-get-previous-element blob options)))) (table-row (org-export-table-row-is-special-p blob options)) (timestamp (case (plist-get options :with-timestamps) ;; No timestamp allowed. ('nil t) ;; Only active timestamps allowed and the current one isn't ;; active. (active (not (memq (org-element-property :type blob) '(active active-range)))) ;; Only inactive timestamps allowed and the current one isn't ;; inactive. (inactive (not (memq (org-element-property :type blob) '(inactive inactive-range)))))))) ;;; The Transcoder ;; ;; `org-export-data' reads a parse tree (obtained with, i.e. ;; `org-element-parse-buffer') and transcodes it into a specified ;; back-end output. It takes care of filtering out elements or ;; objects according to export options and organizing the output blank ;; lines and white space are preserved. The function memoizes its ;; results, so it is cheap to call it within translators. ;; ;; Internally, three functions handle the filtering of objects and ;; elements during the export. In particular, ;; `org-export-ignore-element' marks an element or object so future ;; parse tree traversals skip it, `org-export--interpret-p' tells which ;; elements or objects should be seen as real Org syntax and ;; `org-export-expand' transforms the others back into their original ;; shape ;; ;; `org-export-transcoder' is an accessor returning appropriate ;; translator function for a given element or object. (defun org-export-transcoder (blob info) "Return appropriate transcoder for BLOB. INFO is a plist containing export directives." (let ((type (org-element-type blob))) ;; Return contents only for complete parse trees. (if (eq type 'org-data) (lambda (blob contents info) contents) (let ((transcoder (cdr (assq type (plist-get info :translate-alist))))) (and (functionp transcoder) transcoder))))) (defun org-export-data (data info) "Convert DATA into current back-end format. DATA is a parse tree, an element or an object or a secondary string. INFO is a plist holding export options. Return transcoded string." (let ((memo (gethash data (plist-get info :exported-data) 'no-memo))) (if (not (eq memo 'no-memo)) memo (let* ((type (org-element-type data)) (results (cond ;; Ignored element/object. ((memq data (plist-get info :ignore-list)) nil) ;; Plain text. ((eq type 'plain-text) (org-export-filter-apply-functions (plist-get info :filter-plain-text) (let ((transcoder (org-export-transcoder data info))) (if transcoder (funcall transcoder data info) data)) info)) ;; Uninterpreted element/object: change it back to Org ;; syntax and export again resulting raw string. ((not (org-export--interpret-p data info)) (org-export-data (org-export-expand data (mapconcat (lambda (blob) (org-export-data blob info)) (org-element-contents data) "")) info)) ;; Secondary string. ((not type) (mapconcat (lambda (obj) (org-export-data obj info)) data "")) ;; Element/Object without contents or, as a special case, ;; headline with archive tag and archived trees restricted ;; to title only. ((or (not (org-element-contents data)) (and (eq type 'headline) (eq (plist-get info :with-archived-trees) 'headline) (org-element-property :archivedp data))) (let ((transcoder (org-export-transcoder data info))) (and (functionp transcoder) (funcall transcoder data nil info)))) ;; Element/Object with contents. (t (let ((transcoder (org-export-transcoder data info))) (when transcoder (let* ((greaterp (memq type org-element-greater-elements)) (objectp (and (not greaterp) (memq type org-element-recursive-objects))) (contents (mapconcat (lambda (element) (org-export-data element info)) (org-element-contents (if (or greaterp objectp) data ;; Elements directly containing objects ;; must have their indentation normalized ;; first. (org-element-normalize-contents data ;; When normalizing contents of the first ;; paragraph in an item or a footnote ;; definition, ignore first line's ;; indentation: there is none and it ;; might be misleading. (when (eq type 'paragraph) (let ((parent (org-export-get-parent data))) (and (eq (car (org-element-contents parent)) data) (memq (org-element-type parent) '(footnote-definition item)))))))) ""))) (funcall transcoder data (if (not greaterp) contents (org-element-normalize-string contents)) info)))))))) ;; Final result will be memoized before being returned. (puthash data (cond ((not results) nil) ((memq type '(org-data plain-text nil)) results) ;; Append the same white space between elements or objects as in ;; the original buffer, and call appropriate filters. (t (let ((results (org-export-filter-apply-functions (plist-get info (intern (format ":filter-%s" type))) (let ((post-blank (or (org-element-property :post-blank data) 0))) (if (memq type org-element-all-elements) (concat (org-element-normalize-string results) (make-string post-blank ?\n)) (concat results (make-string post-blank ? )))) info))) results))) (plist-get info :exported-data)))))) (defun org-export--interpret-p (blob info) "Non-nil if element or object BLOB should be interpreted as Org syntax. Check is done according to export options INFO, stored as a plist." (case (org-element-type blob) ;; ... entities... (entity (plist-get info :with-entities)) ;; ... emphasis... (emphasis (plist-get info :with-emphasize)) ;; ... fixed-width areas. (fixed-width (plist-get info :with-fixed-width)) ;; ... footnotes... ((footnote-definition footnote-reference) (plist-get info :with-footnotes)) ;; ... sub/superscripts... ((subscript superscript) (let ((sub/super-p (plist-get info :with-sub-superscript))) (if (eq sub/super-p '{}) (org-element-property :use-brackets-p blob) sub/super-p))) ;; ... tables... (table (plist-get info :with-tables)) (otherwise t))) (defun org-export-expand (blob contents) "Expand a parsed element or object to its original state. BLOB is either an element or an object. CONTENTS is its contents, as a string or nil." (funcall (intern (format "org-element-%s-interpreter" (org-element-type blob))) blob contents)) (defun org-export-ignore-element (element info) "Add ELEMENT to `:ignore-list' in INFO. Any element in `:ignore-list' will be skipped when using `org-element-map'. INFO is modified by side effects." (plist-put info :ignore-list (cons element (plist-get info :ignore-list)))) ;;; The Filter System ;; ;; Filters allow end-users to tweak easily the transcoded output. ;; They are the functional counterpart of hooks, as every filter in ;; a set is applied to the return value of the previous one. ;; ;; Every set is back-end agnostic. Although, a filter is always ;; called, in addition to the string it applies to, with the back-end ;; used as argument, so it's easy for the end-user to add back-end ;; specific filters in the set. The communication channel, as ;; a plist, is required as the third argument. ;; ;; From the developer side, filters sets can be installed in the ;; process with the help of `org-export-define-backend', which ;; internally sets `org-BACKEND-filters-alist' variable. Each ;; association has a key among the following symbols and a function or ;; a list of functions as value. ;; ;; - `:filter-parse-tree' applies directly on the complete parsed ;; tree. It's the only filters set that doesn't apply to a string. ;; Users can set it through `org-export-filter-parse-tree-functions' ;; variable. ;; ;; - `:filter-final-output' applies to the final transcoded string. ;; Users can set it with `org-export-filter-final-output-functions' ;; variable ;; ;; - `:filter-plain-text' applies to any string not recognized as Org ;; syntax. `org-export-filter-plain-text-functions' allows users to ;; configure it. ;; ;; - `:filter-TYPE' applies on the string returned after an element or ;; object of type TYPE has been transcoded. An user can modify ;; `org-export-filter-TYPE-functions' ;; ;; All filters sets are applied with ;; `org-export-filter-apply-functions' function. Filters in a set are ;; applied in a LIFO fashion. It allows developers to be sure that ;; their filters will be applied first. ;; ;; Filters properties are installed in communication channel with ;; `org-export-install-filters' function. ;; ;; Eventually, a hook (`org-export-before-parsing-hook') is run just ;; before parsing to allow for heavy structure modifications. ;;;; Before Parsing Hook (defvar org-export-before-parsing-hook nil "Hook run before parsing an export buffer. This is run after include keywords have been expanded and Babel code executed, on a copy of original buffer's area being exported. Visibility is the same as in the original one. Point is left at the beginning of the new one. Every function in this hook will be called with one argument: the back-end currently used, as a symbol.") ;;;; Special Filters (defvar org-export-filter-parse-tree-functions nil "List of functions applied to the parsed tree. Each filter is called with three arguments: the parse tree, as returned by `org-element-parse-buffer', the back-end, as a symbol, and the communication channel, as a plist. It must return the modified parse tree to transcode.") (defvar org-export-filter-final-output-functions nil "List of functions applied to the transcoded string. Each filter is called with three arguments: the full transcoded string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string that will be used as the final export output.") (defvar org-export-filter-plain-text-functions nil "List of functions applied to plain text. Each filter is called with three arguments: a string which contains no Org syntax, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") ;;;; Elements Filters (defvar org-export-filter-babel-call-functions nil "List of functions applied to a transcoded babel-call. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-center-block-functions nil "List of functions applied to a transcoded center block. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-clock-functions nil "List of functions applied to a transcoded clock. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-comment-functions nil "List of functions applied to a transcoded comment. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-comment-block-functions nil "List of functions applied to a transcoded comment-comment. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-drawer-functions nil "List of functions applied to a transcoded drawer. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-dynamic-block-functions nil "List of functions applied to a transcoded dynamic-block. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-example-block-functions nil "List of functions applied to a transcoded example-block. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-export-block-functions nil "List of functions applied to a transcoded export-block. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-fixed-width-functions nil "List of functions applied to a transcoded fixed-width. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-footnote-definition-functions nil "List of functions applied to a transcoded footnote-definition. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-headline-functions nil "List of functions applied to a transcoded headline. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-horizontal-rule-functions nil "List of functions applied to a transcoded horizontal-rule. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-inlinetask-functions nil "List of functions applied to a transcoded inlinetask. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-item-functions nil "List of functions applied to a transcoded item. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-keyword-functions nil "List of functions applied to a transcoded keyword. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-latex-environment-functions nil "List of functions applied to a transcoded latex-environment. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-node-property-functions nil "List of functions applied to a transcoded node-property. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-paragraph-functions nil "List of functions applied to a transcoded paragraph. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-plain-list-functions nil "List of functions applied to a transcoded plain-list. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-planning-functions nil "List of functions applied to a transcoded planning. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-property-drawer-functions nil "List of functions applied to a transcoded property-drawer. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-quote-block-functions nil "List of functions applied to a transcoded quote block. Each filter is called with three arguments: the transcoded quote data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-quote-section-functions nil "List of functions applied to a transcoded quote-section. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-section-functions nil "List of functions applied to a transcoded section. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-special-block-functions nil "List of functions applied to a transcoded special block. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-src-block-functions nil "List of functions applied to a transcoded src-block. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-table-functions nil "List of functions applied to a transcoded table. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-table-cell-functions nil "List of functions applied to a transcoded table-cell. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-table-row-functions nil "List of functions applied to a transcoded table-row. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-verse-block-functions nil "List of functions applied to a transcoded verse block. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") ;;;; Objects Filters (defvar org-export-filter-bold-functions nil "List of functions applied to transcoded bold text. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-code-functions nil "List of functions applied to transcoded code text. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-entity-functions nil "List of functions applied to a transcoded entity. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-export-snippet-functions nil "List of functions applied to a transcoded export-snippet. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-footnote-reference-functions nil "List of functions applied to a transcoded footnote-reference. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-inline-babel-call-functions nil "List of functions applied to a transcoded inline-babel-call. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-inline-src-block-functions nil "List of functions applied to a transcoded inline-src-block. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-italic-functions nil "List of functions applied to transcoded italic text. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-latex-fragment-functions nil "List of functions applied to a transcoded latex-fragment. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-line-break-functions nil "List of functions applied to a transcoded line-break. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-link-functions nil "List of functions applied to a transcoded link. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-macro-functions nil "List of functions applied to a transcoded macro. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-radio-target-functions nil "List of functions applied to a transcoded radio-target. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-statistics-cookie-functions nil "List of functions applied to a transcoded statistics-cookie. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-strike-through-functions nil "List of functions applied to transcoded strike-through text. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-subscript-functions nil "List of functions applied to a transcoded subscript. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-superscript-functions nil "List of functions applied to a transcoded superscript. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-target-functions nil "List of functions applied to a transcoded target. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-timestamp-functions nil "List of functions applied to a transcoded timestamp. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-underline-functions nil "List of functions applied to transcoded underline text. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") (defvar org-export-filter-verbatim-functions nil "List of functions applied to transcoded verbatim text. Each filter is called with three arguments: the transcoded data, as a string, the back-end, as a symbol, and the communication channel, as a plist. It must return a string or nil.") ;;;; Filters Tools ;; ;; Internal function `org-export-install-filters' installs filters ;; hard-coded in back-ends (developer filters) and filters from global ;; variables (user filters) in the communication channel. ;; ;; Internal function `org-export-filter-apply-functions' takes care ;; about applying each filter in order to a given data. It ignores ;; filters returning a nil value but stops whenever a filter returns ;; an empty string. (defun org-export-filter-apply-functions (filters value info) "Call every function in FILTERS. Functions are called with arguments VALUE, current export back-end and INFO. A function returning a nil value will be skipped. If it returns the empty string, the process ends and VALUE is ignored. Call is done in a LIFO fashion, to be sure that developer specified filters, if any, are called first." (catch 'exit (dolist (filter filters value) (let ((result (funcall filter value (plist-get info :back-end) info))) (cond ((not result) value) ((equal value "") (throw 'exit nil)) (t (setq value result))))))) (defun org-export-install-filters (info) "Install filters properties in communication channel. INFO is a plist containing the current communication channel. Return the updated communication channel." (let (plist) ;; Install user defined filters with `org-export-filters-alist'. (mapc (lambda (p) (setq plist (plist-put plist (car p) (eval (cdr p))))) org-export-filters-alist) ;; Prepend back-end specific filters to that list. (let ((back-end-filters (intern (format "org-%s-filters-alist" (plist-get info :back-end))))) (when (boundp back-end-filters) (mapc (lambda (p) ;; Single values get consed, lists are prepended. (let ((key (car p)) (value (cdr p))) (when value (setq plist (plist-put plist key (if (atom value) (cons value (plist-get plist key)) (append value (plist-get plist key)))))))) (eval back-end-filters)))) ;; Return new communication channel. (org-combine-plists info plist))) ;;; Core functions ;; ;; This is the room for the main function, `org-export-as', along with ;; its derivatives, `org-export-to-buffer' and `org-export-to-file'. ;; They differ only by the way they output the resulting code. ;; ;; `org-export-output-file-name' is an auxiliary function meant to be ;; used with `org-export-to-file'. With a given extension, it tries ;; to provide a canonical file name to write export output to. ;; ;; Note that `org-export-as' doesn't really parse the current buffer, ;; but a copy of it (with the same buffer-local variables and ;; visibility), where macros and include keywords are expanded and ;; Babel blocks are executed, if appropriate. ;; `org-export-with-current-buffer-copy' macro prepares that copy. ;; ;; File inclusion is taken care of by ;; `org-export-expand-include-keyword' and ;; `org-export--prepare-file-contents'. Structure wise, including ;; a whole Org file in a buffer often makes little sense. For ;; example, if the file contains an headline and the include keyword ;; was within an item, the item should contain the headline. That's ;; why file inclusion should be done before any structure can be ;; associated to the file, that is before parsing. (defun org-export-as (backend &optional subtreep visible-only body-only ext-plist noexpand) "Transcode current Org buffer into BACKEND code. If narrowing is active in the current buffer, only transcode its narrowed part. If a region is active, transcode that region. When optional argument SUBTREEP is non-nil, transcode the sub-tree at point, extracting information from the headline properties first. When optional argument VISIBLE-ONLY is non-nil, don't export contents of hidden elements. When optional argument BODY-ONLY is non-nil, only return body code, without preamble nor postamble. Optional argument EXT-PLIST, when provided, is a property list with external parameters overriding Org default settings, but still inferior to file-local settings. Optional argument NOEXPAND, when non-nil, prevents included files to be expanded and Babel code to be executed. Return code as a string." ;; Barf if BACKEND isn't registered. (org-export-barf-if-invalid-backend backend) (save-excursion (save-restriction ;; Narrow buffer to an appropriate region or subtree for ;; parsing. If parsing subtree, be sure to remove main headline ;; too. (cond ((org-region-active-p) (narrow-to-region (region-beginning) (region-end))) (subtreep (org-narrow-to-subtree) (goto-char (point-min)) (forward-line) (narrow-to-region (point) (point-max)))) ;; 1. Get export environment from original buffer. Also install ;; user's and developer's filters. (let ((info (org-export-install-filters (org-export-get-environment backend subtreep ext-plist))) ;; 2. Get parse tree. Buffer isn't parsed directly. ;; Instead, a temporary copy is created, where macros ;; and include keywords are expanded and code blocks ;; are evaluated. (tree (let ((buf (or (buffer-file-name (buffer-base-buffer)) (current-buffer)))) (org-export-with-current-buffer-copy (unless noexpand (org-macro-replace-all) (org-export-expand-include-keyword) ;; TODO: Setting `org-current-export-file' is ;; required by Org Babel to properly resolve ;; noweb references. Once "org-exp.el" is ;; removed, modify ;; `org-export-blocks-preprocess' so it accepts ;; the value as an argument instead. (let ((org-current-export-file buf)) (org-export-blocks-preprocess))) (goto-char (point-min)) ;; Run hook ;; `org-export-before-parsing-hook'. with current ;; back-end as argument. (run-hook-with-args 'org-export-before-parsing-hook backend) ;; Eventually parse buffer. (org-element-parse-buffer nil visible-only))))) ;; 3. Call parse-tree filters to get the final tree. (setq tree (org-export-filter-apply-functions (plist-get info :filter-parse-tree) tree info)) ;; 4. Now tree is complete, compute its properties and add ;; them to communication channel. (setq info (org-combine-plists info (org-export-collect-tree-properties tree info))) ;; 5. Eventually transcode TREE. Wrap the resulting string ;; into a template, if required. Eventually call ;; final-output filter. (let* ((body (org-element-normalize-string (org-export-data tree info))) (template (cdr (assq 'template (plist-get info :translate-alist)))) (output (org-export-filter-apply-functions (plist-get info :filter-final-output) (if (or (not (functionp template)) body-only) body (funcall template body info)) info))) ;; Maybe add final OUTPUT to kill ring, then return it. (when org-export-copy-to-kill-ring (org-kill-new output)) output))))) (defun org-export-to-buffer (backend buffer &optional subtreep visible-only body-only ext-plist noexpand) "Call `org-export-as' with output to a specified buffer. BACKEND is the back-end used for transcoding, as a symbol. BUFFER is the output buffer. If it already exists, it will be erased first, otherwise, it will be created. Optional arguments SUBTREEP, VISIBLE-ONLY, BODY-ONLY, EXT-PLIST and NOEXPAND are similar to those used in `org-export-as', which see. Return buffer." (let ((out (org-export-as backend subtreep visible-only body-only ext-plist noexpand)) (buffer (get-buffer-create buffer))) (with-current-buffer buffer (erase-buffer) (insert out) (goto-char (point-min))) buffer)) (defun org-export-to-file (backend file &optional subtreep visible-only body-only ext-plist noexpand) "Call `org-export-as' with output to a specified file. BACKEND is the back-end used for transcoding, as a symbol. FILE is the name of the output file, as a string. Optional arguments SUBTREEP, VISIBLE-ONLY, BODY-ONLY, EXT-PLIST and NOEXPAND are similar to those used in `org-export-as', which see. Return output file's name." ;; Checks for FILE permissions. `write-file' would do the same, but ;; we'd rather avoid needless transcoding of parse tree. (unless (file-writable-p file) (error "Output file not writable")) ;; Insert contents to a temporary buffer and write it to FILE. (let ((out (org-export-as backend subtreep visible-only body-only ext-plist noexpand))) (with-temp-buffer (insert out) (let ((coding-system-for-write org-export-coding-system)) (write-file file)))) ;; Return full path. file) (defun org-export-output-file-name (extension &optional subtreep pub-dir) "Return output file's name according to buffer specifications. EXTENSION is a string representing the output file extension, with the leading dot. With a non-nil optional argument SUBTREEP, try to determine output file's name by looking for \"EXPORT_FILE_NAME\" property of subtree at point. When optional argument PUB-DIR is set, use it as the publishing directory. When optional argument VISIBLE-ONLY is non-nil, don't export contents of hidden elements. Return file name as a string, or nil if it couldn't be determined." (let ((base-name ;; File name may come from EXPORT_FILE_NAME subtree property, ;; assuming point is at beginning of said sub-tree. (file-name-sans-extension (or (and subtreep (org-entry-get (save-excursion (ignore-errors (org-back-to-heading) (point))) "EXPORT_FILE_NAME" t)) ;; File name may be extracted from buffer's associated ;; file, if any. (buffer-file-name (buffer-base-buffer)) ;; Can't determine file name on our own: Ask user. (let ((read-file-name-function (and org-completion-use-ido 'ido-read-file-name))) (read-file-name "Output file: " pub-dir nil nil nil (lambda (name) (string= (file-name-extension name t) extension)))))))) ;; Build file name. Enforce EXTENSION over whatever user may have ;; come up with. PUB-DIR, if defined, always has precedence over ;; any provided path. (cond (pub-dir (concat (file-name-as-directory pub-dir) (file-name-nondirectory base-name) extension)) ((string= (file-name-nondirectory base-name) base-name) (concat (file-name-as-directory ".") base-name extension)) (t (concat base-name extension))))) (defmacro org-export-with-current-buffer-copy (&rest body) "Apply BODY in a copy of the current buffer. The copy preserves local variables and visibility of the original buffer. Point is at buffer's beginning when BODY is applied." (org-with-gensyms (original-buffer offset buffer-string overlays) `(let ((,original-buffer (current-buffer)) (,offset (1- (point-min))) (,buffer-string (buffer-string)) (,overlays (mapcar 'copy-overlay (overlays-in (point-min) (point-max))))) (with-temp-buffer (let ((buffer-invisibility-spec nil)) (org-clone-local-variables ,original-buffer "^\\(org-\\|orgtbl-\\|major-mode$\\|outline-\\(regexp\\|level\\)$\\)") (insert ,buffer-string) (mapc (lambda (ov) (move-overlay ov (- (overlay-start ov) ,offset) (- (overlay-end ov) ,offset) (current-buffer))) ,overlays) (goto-char (point-min)) (progn ,@body)))))) (def-edebug-spec org-export-with-current-buffer-copy (body)) (defun org-export-expand-include-keyword (&optional included dir) "Expand every include keyword in buffer. Optional argument INCLUDED is a list of included file names along with their line restriction, when appropriate. It is used to avoid infinite recursion. Optional argument DIR is the current working directory. It is used to properly resolve relative paths." (let ((case-fold-search t)) (goto-char (point-min)) (while (re-search-forward "^[ \t]*#\\+INCLUDE: \\(.*\\)" nil t) (when (eq (org-element-type (save-match-data (org-element-at-point))) 'keyword) (beginning-of-line) ;; Extract arguments from keyword's value. (let* ((value (match-string 1)) (ind (org-get-indentation)) (file (and (string-match "^\"\\(\\S-+\\)\"" value) (prog1 (expand-file-name (match-string 1 value) dir) (setq value (replace-match "" nil nil value))))) (lines (and (string-match ":lines +\"\\(\\(?:[0-9]+\\)?-\\(?:[0-9]+\\)?\\)\"" value) (prog1 (match-string 1 value) (setq value (replace-match "" nil nil value))))) (env (cond ((string-match "\\" value) 'example) ((string-match "\\ level limit) (- level limit)))))) (defun org-export-get-headline-number (headline info) "Return HEADLINE numbering as a list of numbers. INFO is a plist holding contextual information." (cdr (assoc headline (plist-get info :headline-numbering)))) (defun org-export-numbered-headline-p (headline info) "Return a non-nil value if HEADLINE element should be numbered. INFO is a plist used as a communication channel." (let ((sec-num (plist-get info :section-numbers)) (level (org-export-get-relative-level headline info))) (if (wholenump sec-num) (<= level sec-num) sec-num))) (defun org-export-number-to-roman (n) "Convert integer N into a roman numeral." (let ((roman '((1000 . "M") (900 . "CM") (500 . "D") (400 . "CD") ( 100 . "C") ( 90 . "XC") ( 50 . "L") ( 40 . "XL") ( 10 . "X") ( 9 . "IX") ( 5 . "V") ( 4 . "IV") ( 1 . "I"))) (res "")) (if (<= n 0) (number-to-string n) (while roman (if (>= n (caar roman)) (setq n (- n (caar roman)) res (concat res (cdar roman))) (pop roman))) res))) (defun org-export-get-tags (element info &optional tags) "Return list of tags associated to ELEMENT. ELEMENT has either an `headline' or an `inlinetask' type. INFO is a plist used as a communication channel. Select tags (see `org-export-select-tags') and exclude tags (see `org-export-exclude-tags') are removed from the list. When non-nil, optional argument TAGS should be a list of strings. Any tag belonging to this list will also be removed." (org-remove-if (lambda (tag) (or (member tag (plist-get info :select-tags)) (member tag (plist-get info :exclude-tags)) (member tag tags))) (org-element-property :tags element))) (defun org-export-get-node-property (property blob &optional inherited) "Return node PROPERTY value for BLOB. PROPERTY is normalized symbol (i.e. `:cookie-data'). BLOB is an element or object. If optional argument INHERITED is non-nil, the value can be inherited from a parent headline. Return value is a string or nil." (let ((headline (if (eq (org-element-type blob) 'headline) blob (org-export-get-parent-headline blob)))) (if (not inherited) (org-element-property property blob) (let ((parent headline) value) (catch 'found (while parent (when (plist-member (nth 1 parent) property) (throw 'found (org-element-property property parent))) (setq parent (org-element-property :parent parent)))))))) (defun org-export-first-sibling-p (headline info) "Non-nil when HEADLINE is the first sibling in its sub-tree. INFO is a plist used as a communication channel." (not (eq (org-element-type (org-export-get-previous-element headline info)) 'headline))) (defun org-export-last-sibling-p (headline info) "Non-nil when HEADLINE is the last sibling in its sub-tree. INFO is a plist used as a communication channel." (not (org-export-get-next-element headline info))) ;;;; For Links ;; ;; `org-export-solidify-link-text' turns a string into a safer version ;; for links, replacing most non-standard characters with hyphens. ;; ;; `org-export-get-coderef-format' returns an appropriate format ;; string for coderefs. ;; ;; `org-export-inline-image-p' returns a non-nil value when the link ;; provided should be considered as an inline image. ;; ;; `org-export-resolve-fuzzy-link' searches destination of fuzzy links ;; (i.e. links with "fuzzy" as type) within the parsed tree, and ;; returns an appropriate unique identifier when found, or nil. ;; ;; `org-export-resolve-id-link' returns the first headline with ;; specified id or custom-id in parse tree, the path to the external ;; file with the id or nil when neither was found. ;; ;; `org-export-resolve-coderef' associates a reference to a line ;; number in the element it belongs, or returns the reference itself ;; when the element isn't numbered. (defun org-export-solidify-link-text (s) "Take link text S and make a safe target out of it." (save-match-data (mapconcat 'identity (org-split-string s "[^a-zA-Z0-9_.-]+") "-"))) (defun org-export-get-coderef-format (path desc) "Return format string for code reference link. PATH is the link path. DESC is its description." (save-match-data (cond ((not desc) "%s") ((string-match (regexp-quote (concat "(" path ")")) desc) (replace-match "%s" t t desc)) (t desc)))) (defun org-export-inline-image-p (link &optional rules) "Non-nil if LINK object points to an inline image. Optional argument is a set of RULES defining inline images. It is an alist where associations have the following shape: \(TYPE . REGEXP) Applying a rule means apply REGEXP against LINK's path when its type is TYPE. The function will return a non-nil value if any of the provided rules is non-nil. The default rule is `org-export-default-inline-image-rule'. This only applies to links without a description." (and (not (org-element-contents link)) (let ((case-fold-search t) (rules (or rules org-export-default-inline-image-rule))) (catch 'exit (mapc (lambda (rule) (and (string= (org-element-property :type link) (car rule)) (string-match (cdr rule) (org-element-property :path link)) (throw 'exit t))) rules) ;; Return nil if no rule matched. nil)))) (defun org-export-resolve-coderef (ref info) "Resolve a code reference REF. INFO is a plist used as a communication channel. Return associated line number in source code, or REF itself, depending on src-block or example element's switches." (org-element-map (plist-get info :parse-tree) '(example-block src-block) (lambda (el) (with-temp-buffer (insert (org-trim (org-element-property :value el))) (let* ((label-fmt (regexp-quote (or (org-element-property :label-fmt el) org-coderef-label-format))) (ref-re (format "^.*?\\S-.*?\\([ \t]*\\(%s\\)\\)[ \t]*$" (replace-regexp-in-string "%s" ref label-fmt nil t)))) ;; Element containing REF is found. Resolve it to either ;; a label or a line number, as needed. (when (re-search-backward ref-re nil t) (cond ((org-element-property :use-labels el) ref) ((eq (org-element-property :number-lines el) 'continued) (+ (org-export-get-loc el info) (line-number-at-pos))) (t (line-number-at-pos))))))) info 'first-match)) (defun org-export-resolve-fuzzy-link (link info) "Return LINK destination. INFO is a plist holding contextual information. Return value can be an object, an element, or nil: - If LINK path matches a target object (i.e. <>) or element (i.e. \"#+TARGET: path\"), return it. - If LINK path exactly matches the name affiliated keyword \(i.e. #+NAME: path) of an element, return that element. - If LINK path exactly matches any headline name, return that element. If more than one headline share that name, priority will be given to the one with the closest common ancestor, if any, or the first one in the parse tree otherwise. - Otherwise, return nil. Assume LINK type is \"fuzzy\"." (let* ((path (org-element-property :path link)) (match-title-p (eq (aref path 0) ?*))) (cond ;; First try to find a matching "<>" unless user specified ;; he was looking for an headline (path starts with a * ;; character). ((and (not match-title-p) (loop for target in (plist-get info :target-list) when (string= (org-element-property :value target) path) return target))) ;; Then try to find an element with a matching "#+NAME: path" ;; affiliated keyword. ((and (not match-title-p) (org-element-map (plist-get info :parse-tree) org-element-all-elements (lambda (el) (when (string= (org-element-property :name el) path) el)) info 'first-match))) ;; Last case: link either points to an headline or to ;; nothingness. Try to find the source, with priority given to ;; headlines with the closest common ancestor. If such candidate ;; is found, return it, otherwise return nil. (t (let ((find-headline (function ;; Return first headline whose `:raw-value' property ;; is NAME in parse tree DATA, or nil. (lambda (name data) (org-element-map data 'headline (lambda (headline) (when (string= (org-element-property :raw-value headline) name) headline)) info 'first-match))))) ;; Search among headlines sharing an ancestor with link, ;; from closest to farthest. (or (catch 'exit (mapc (lambda (parent) (when (eq (org-element-type parent) 'headline) (let ((foundp (funcall find-headline path parent))) (when foundp (throw 'exit foundp))))) (org-export-get-genealogy link)) nil) ;; No match with a common ancestor: try the full parse-tree. (funcall find-headline (if match-title-p (substring path 1) path) (plist-get info :parse-tree)))))))) (defun org-export-resolve-id-link (link info) "Return headline referenced as LINK destination. INFO is a plist used as a communication channel. Return value can be the headline element matched in current parse tree, a file name or nil. Assume LINK type is either \"id\" or \"custom-id\"." (let ((id (org-element-property :path link))) ;; First check if id is within the current parse tree. (or (org-element-map (plist-get info :parse-tree) 'headline (lambda (headline) (when (or (string= (org-element-property :id headline) id) (string= (org-element-property :custom-id headline) id)) headline)) info 'first-match) ;; Otherwise, look for external files. (cdr (assoc id (plist-get info :id-alist)))))) (defun org-export-resolve-radio-link (link info) "Return radio-target object referenced as LINK destination. INFO is a plist used as a communication channel. Return value can be a radio-target object or nil. Assume LINK has type \"radio\"." (let ((path (org-element-property :path link))) (org-element-map (plist-get info :parse-tree) 'radio-target (lambda (radio) (when (equal (org-element-property :value radio) path) radio)) info 'first-match))) ;;;; For References ;; ;; `org-export-get-ordinal' associates a sequence number to any object ;; or element. (defun org-export-get-ordinal (element info &optional types predicate) "Return ordinal number of an element or object. ELEMENT is the element or object considered. INFO is the plist used as a communication channel. Optional argument TYPES, when non-nil, is a list of element or object types, as symbols, that should also be counted in. Otherwise, only provided element's type is considered. Optional argument PREDICATE is a function returning a non-nil value if the current element or object should be counted in. It accepts two arguments: the element or object being considered and the plist used as a communication channel. This allows to count only a certain type of objects (i.e. inline images). Return value is a list of numbers if ELEMENT is an headline or an item. It is nil for keywords. It represents the footnote number for footnote definitions and footnote references. If ELEMENT is a target, return the same value as if ELEMENT was the closest table, item or headline containing the target. In any other case, return the sequence number of ELEMENT among elements or objects of the same type." ;; A target keyword, representing an invisible target, never has ;; a sequence number. (unless (eq (org-element-type element) 'keyword) ;; Ordinal of a target object refer to the ordinal of the closest ;; table, item, or headline containing the object. (when (eq (org-element-type element) 'target) (setq element (loop for parent in (org-export-get-genealogy element) when (memq (org-element-type parent) '(footnote-definition footnote-reference headline item table)) return parent))) (case (org-element-type element) ;; Special case 1: An headline returns its number as a list. (headline (org-export-get-headline-number element info)) ;; Special case 2: An item returns its number as a list. (item (let ((struct (org-element-property :structure element))) (org-list-get-item-number (org-element-property :begin element) struct (org-list-prevs-alist struct) (org-list-parents-alist struct)))) ((footnote-definition footnote-reference) (org-export-get-footnote-number element info)) (otherwise (let ((counter 0)) ;; Increment counter until ELEMENT is found again. (org-element-map (plist-get info :parse-tree) (or types (org-element-type element)) (lambda (el) (cond ((eq element el) (1+ counter)) ((not predicate) (incf counter) nil) ((funcall predicate el info) (incf counter) nil))) info 'first-match)))))) ;;;; For Src-Blocks ;; ;; `org-export-get-loc' counts number of code lines accumulated in ;; src-block or example-block elements with a "+n" switch until ;; a given element, excluded. Note: "-n" switches reset that count. ;; ;; `org-export-unravel-code' extracts source code (along with a code ;; references alist) from an `element-block' or `src-block' type ;; element. ;; ;; `org-export-format-code' applies a formatting function to each line ;; of code, providing relative line number and code reference when ;; appropriate. Since it doesn't access the original element from ;; which the source code is coming, it expects from the code calling ;; it to know if lines should be numbered and if code references ;; should appear. ;; ;; Eventually, `org-export-format-code-default' is a higher-level ;; function (it makes use of the two previous functions) which handles ;; line numbering and code references inclusion, and returns source ;; code in a format suitable for plain text or verbatim output. (defun org-export-get-loc (element info) "Return accumulated lines of code up to ELEMENT. INFO is the plist used as a communication channel. ELEMENT is excluded from count." (let ((loc 0)) (org-element-map (plist-get info :parse-tree) `(src-block example-block ,(org-element-type element)) (lambda (el) (cond ;; ELEMENT is reached: Quit the loop. ((eq el element)) ;; Only count lines from src-block and example-block elements ;; with a "+n" or "-n" switch. A "-n" switch resets counter. ((not (memq (org-element-type el) '(src-block example-block))) nil) ((let ((linums (org-element-property :number-lines el))) (when linums ;; Accumulate locs or reset them. (let ((lines (org-count-lines (org-trim (org-element-property :value el))))) (setq loc (if (eq linums 'new) lines (+ loc lines)))))) ;; Return nil to stay in the loop. nil))) info 'first-match) ;; Return value. loc)) (defun org-export-unravel-code (element) "Clean source code and extract references out of it. ELEMENT has either a `src-block' an `example-block' type. Return a cons cell whose CAR is the source code, cleaned from any reference and protective comma and CDR is an alist between relative line number (integer) and name of code reference on that line (string)." (let* ((line 0) refs ;; Get code and clean it. Remove blank lines at its ;; beginning and end. Also remove protective commas. (code (let ((c (replace-regexp-in-string "\\`\\([ \t]*\n\\)+" "" (replace-regexp-in-string "\\(:?[ \t]*\n\\)*[ \t]*\\'" "\n" (org-element-property :value element))))) ;; If appropriate, remove global indentation. (unless (or org-src-preserve-indentation (org-element-property :preserve-indent element)) (setq c (org-remove-indentation c))) ;; Free up the protected lines. Note: Org blocks ;; have commas at the beginning or every line. (if (string= (org-element-property :language element) "org") (replace-regexp-in-string "^," "" c) (replace-regexp-in-string "^\\(,\\)\\(:?\\*\\|[ \t]*#\\+\\)" "" c nil nil 1)))) ;; Get format used for references. (label-fmt (regexp-quote (or (org-element-property :label-fmt element) org-coderef-label-format))) ;; Build a regexp matching a loc with a reference. (with-ref-re (format "^.*?\\S-.*?\\([ \t]*\\(%s\\)[ \t]*\\)$" (replace-regexp-in-string "%s" "\\([-a-zA-Z0-9_ ]+\\)" label-fmt nil t)))) ;; Return value. (cons ;; Code with references removed. (org-element-normalize-string (mapconcat (lambda (loc) (incf line) (if (not (string-match with-ref-re loc)) loc ;; Ref line: remove ref, and signal its position in REFS. (push (cons line (match-string 3 loc)) refs) (replace-match "" nil nil loc 1))) (org-split-string code "\n") "\n")) ;; Reference alist. refs))) (defun org-export-format-code (code fun &optional num-lines ref-alist) "Format CODE by applying FUN line-wise and return it. CODE is a string representing the code to format. FUN is a function. It must accept three arguments: a line of code (string), the current line number (integer) or nil and the reference associated to the current line (string) or nil. Optional argument NUM-LINES can be an integer representing the number of code lines accumulated until the current code. Line numbers passed to FUN will take it into account. If it is nil, FUN's second argument will always be nil. This number can be obtained with `org-export-get-loc' function. Optional argument REF-ALIST can be an alist between relative line number (i.e. ignoring NUM-LINES) and the name of the code reference on it. If it is nil, FUN's third argument will always be nil. It can be obtained through the use of `org-export-unravel-code' function." (let ((--locs (org-split-string code "\n")) (--line 0)) (org-element-normalize-string (mapconcat (lambda (--loc) (incf --line) (let ((--ref (cdr (assq --line ref-alist)))) (funcall fun --loc (and num-lines (+ num-lines --line)) --ref))) --locs "\n")))) (defun org-export-format-code-default (element info) "Return source code from ELEMENT, formatted in a standard way. ELEMENT is either a `src-block' or `example-block' element. INFO is a plist used as a communication channel. This function takes care of line numbering and code references inclusion. Line numbers, when applicable, appear at the beginning of the line, separated from the code by two white spaces. Code references, on the other hand, appear flushed to the right, separated by six white spaces from the widest line of code." ;; Extract code and references. (let* ((code-info (org-export-unravel-code element)) (code (car code-info)) (code-lines (org-split-string code "\n")) (refs (and (org-element-property :retain-labels element) (cdr code-info))) ;; Handle line numbering. (num-start (case (org-element-property :number-lines element) (continued (org-export-get-loc element info)) (new 0))) (num-fmt (and num-start (format "%%%ds " (length (number-to-string (+ (length code-lines) num-start)))))) ;; Prepare references display, if required. Any reference ;; should start six columns after the widest line of code, ;; wrapped with parenthesis. (max-width (+ (apply 'max (mapcar 'length code-lines)) (if (not num-start) 0 (length (format num-fmt num-start)))))) (org-export-format-code code (lambda (loc line-num ref) (let ((number-str (and num-fmt (format num-fmt line-num)))) (concat number-str loc (and ref (concat (make-string (- (+ 6 max-width) (+ (length loc) (length number-str))) ? ) (format "(%s)" ref)))))) num-start refs))) ;;;; For Tables ;; ;; `org-export-table-has-special-column-p' and and ;; `org-export-table-row-is-special-p' are predicates used to look for ;; meta-information about the table structure. ;; ;; `org-table-has-header-p' tells when the rows before the first rule ;; should be considered as table's header. ;; ;; `org-export-table-cell-width', `org-export-table-cell-alignment' ;; and `org-export-table-cell-borders' extract information from ;; a table-cell element. ;; ;; `org-export-table-dimensions' gives the number on rows and columns ;; in the table, ignoring horizontal rules and special columns. ;; `org-export-table-cell-address', given a table-cell object, returns ;; the absolute address of a cell. On the other hand, ;; `org-export-get-table-cell-at' does the contrary. ;; ;; `org-export-table-cell-starts-colgroup-p', ;; `org-export-table-cell-ends-colgroup-p', ;; `org-export-table-row-starts-rowgroup-p', ;; `org-export-table-row-ends-rowgroup-p', ;; `org-export-table-row-starts-header-p' and ;; `org-export-table-row-ends-header-p' indicate position of current ;; row or cell within the table. (defun org-export-table-has-special-column-p (table) "Non-nil when TABLE has a special column. All special columns will be ignored during export." ;; The table has a special column when every first cell of every row ;; has an empty value or contains a symbol among "/", "#", "!", "$", ;; "*" "_" and "^". Though, do not consider a first row containing ;; only empty cells as special. (let ((special-column-p 'empty)) (catch 'exit (mapc (lambda (row) (when (eq (org-element-property :type row) 'standard) (let ((value (org-element-contents (car (org-element-contents row))))) (cond ((member value '(("/") ("#") ("!") ("$") ("*") ("_") ("^"))) (setq special-column-p 'special)) ((not value)) (t (throw 'exit nil)))))) (org-element-contents table)) (eq special-column-p 'special)))) (defun org-export-table-has-header-p (table info) "Non-nil when TABLE has an header. INFO is a plist used as a communication channel. A table has an header when it contains at least two row groups." (let ((rowgroup 1) row-flag) (org-element-map table 'table-row (lambda (row) (cond ((> rowgroup 1) t) ((and row-flag (eq (org-element-property :type row) 'rule)) (incf rowgroup) (setq row-flag nil)) ((and (not row-flag) (eq (org-element-property :type row) 'standard)) (setq row-flag t) nil))) info))) (defun org-export-table-row-is-special-p (table-row info) "Non-nil if TABLE-ROW is considered special. INFO is a plist used as the communication channel. All special rows will be ignored during export." (when (eq (org-element-property :type table-row) 'standard) (let ((first-cell (org-element-contents (car (org-element-contents table-row))))) ;; A row is special either when... (or ;; ... it starts with a field only containing "/", (equal first-cell '("/")) ;; ... the table contains a special column and the row start ;; with a marking character among, "^", "_", "$" or "!", (and (org-export-table-has-special-column-p (org-export-get-parent table-row)) (member first-cell '(("^") ("_") ("$") ("!")))) ;; ... it contains only alignment cookies and empty cells. (let ((special-row-p 'empty)) (catch 'exit (mapc (lambda (cell) (let ((value (org-element-contents cell))) ;; Since VALUE is a secondary string, the following ;; checks avoid expanding it with `org-export-data'. (cond ((not value)) ((and (not (cdr value)) (stringp (car value)) (string-match "\\`<[lrc]?\\([0-9]+\\)?>\\'" (car value))) (setq special-row-p 'cookie)) (t (throw 'exit nil))))) (org-element-contents table-row)) (eq special-row-p 'cookie))))))) (defun org-export-table-row-group (table-row info) "Return TABLE-ROW's group. INFO is a plist used as the communication channel. Return value is the group number, as an integer, or nil special rows and table rules. Group 1 is also table's header." (unless (or (eq (org-element-property :type table-row) 'rule) (org-export-table-row-is-special-p table-row info)) (let ((group 0) row-flag) (catch 'found (mapc (lambda (row) (cond ((and (eq (org-element-property :type row) 'standard) (not (org-export-table-row-is-special-p row info))) (unless row-flag (incf group) (setq row-flag t))) ((eq (org-element-property :type row) 'rule) (setq row-flag nil))) (when (eq table-row row) (throw 'found group))) (org-element-contents (org-export-get-parent table-row))))))) (defun org-export-table-cell-width (table-cell info) "Return TABLE-CELL contents width. INFO is a plist used as the communication channel. Return value is the width given by the last width cookie in the same column as TABLE-CELL, or nil." (let* ((row (org-export-get-parent table-cell)) (column (let ((cells (org-element-contents row))) (- (length cells) (length (memq table-cell cells))))) (table (org-export-get-parent-table table-cell)) cookie-width) (mapc (lambda (row) (cond ;; In a special row, try to find a width cookie at COLUMN. ((org-export-table-row-is-special-p row info) (let ((value (org-element-contents (elt (org-element-contents row) column)))) ;; The following checks avoid expanding unnecessarily the ;; cell with `org-export-data' (when (and value (not (cdr value)) (stringp (car value)) (string-match "\\`<[lrc]?\\([0-9]+\\)?>\\'" (car value)) (match-string 1 (car value))) (setq cookie-width (string-to-number (match-string 1 (car value))))))) ;; Ignore table rules. ((eq (org-element-property :type row) 'rule)))) (org-element-contents table)) ;; Return value. cookie-width)) (defun org-export-table-cell-alignment (table-cell info) "Return TABLE-CELL contents alignment. INFO is a plist used as the communication channel. Return alignment as specified by the last alignment cookie in the same column as TABLE-CELL. If no such cookie is found, a default alignment value will be deduced from fraction of numbers in the column (see `org-table-number-fraction' for more information). Possible values are `left', `right' and `center'." (let* ((row (org-export-get-parent table-cell)) (column (let ((cells (org-element-contents row))) (- (length cells) (length (memq table-cell cells))))) (table (org-export-get-parent-table table-cell)) (number-cells 0) (total-cells 0) cookie-align) (mapc (lambda (row) (cond ;; In a special row, try to find an alignment cookie at ;; COLUMN. ((org-export-table-row-is-special-p row info) (let ((value (org-element-contents (elt (org-element-contents row) column)))) ;; Since VALUE is a secondary string, the following checks ;; avoid useless expansion through `org-export-data'. (when (and value (not (cdr value)) (stringp (car value)) (string-match "\\`<\\([lrc]\\)?\\([0-9]+\\)?>\\'" (car value)) (match-string 1 (car value))) (setq cookie-align (match-string 1 (car value)))))) ;; Ignore table rules. ((eq (org-element-property :type row) 'rule)) ;; In a standard row, check if cell's contents are expressing ;; some kind of number. Increase NUMBER-CELLS accordingly. ;; Though, don't bother if an alignment cookie has already ;; defined cell's alignment. ((not cookie-align) (let ((value (org-export-data (org-element-contents (elt (org-element-contents row) column)) info))) (incf total-cells) (when (string-match org-table-number-regexp value) (incf number-cells)))))) (org-element-contents table)) ;; Return value. Alignment specified by cookies has precedence ;; over alignment deduced from cells contents. (cond ((equal cookie-align "l") 'left) ((equal cookie-align "r") 'right) ((equal cookie-align "c") 'center) ((>= (/ (float number-cells) total-cells) org-table-number-fraction) 'right) (t 'left)))) (defun org-export-table-cell-borders (table-cell info) "Return TABLE-CELL borders. INFO is a plist used as a communication channel. Return value is a list of symbols, or nil. Possible values are: `top', `bottom', `above', `below', `left' and `right'. Note: `top' (resp. `bottom') only happen for a cell in the first row (resp. last row) of the table, ignoring table rules, if any. Returned borders ignore special rows." (let* ((row (org-export-get-parent table-cell)) (table (org-export-get-parent-table table-cell)) borders) ;; Top/above border? TABLE-CELL has a border above when a rule ;; used to demarcate row groups can be found above. Hence, ;; finding a rule isn't sufficient to push `above' in BORDERS: ;; another regular row has to be found above that rule. (let (rule-flag) (catch 'exit (mapc (lambda (row) (cond ((eq (org-element-property :type row) 'rule) (setq rule-flag t)) ((not (org-export-table-row-is-special-p row info)) (if rule-flag (throw 'exit (push 'above borders)) (throw 'exit nil))))) ;; Look at every row before the current one. (cdr (memq row (reverse (org-element-contents table))))) ;; No rule above, or rule found starts the table (ignoring any ;; special row): TABLE-CELL is at the top of the table. (when rule-flag (push 'above borders)) (push 'top borders))) ;; Bottom/below border? TABLE-CELL has a border below when next ;; non-regular row below is a rule. (let (rule-flag) (catch 'exit (mapc (lambda (row) (cond ((eq (org-element-property :type row) 'rule) (setq rule-flag t)) ((not (org-export-table-row-is-special-p row info)) (if rule-flag (throw 'exit (push 'below borders)) (throw 'exit nil))))) ;; Look at every row after the current one. (cdr (memq row (org-element-contents table)))) ;; No rule below, or rule found ends the table (modulo some ;; special row): TABLE-CELL is at the bottom of the table. (when rule-flag (push 'below borders)) (push 'bottom borders))) ;; Right/left borders? They can only be specified by column ;; groups. Column groups are defined in a row starting with "/". ;; Also a column groups row only contains "<", "<>", ">" or blank ;; cells. (catch 'exit (let ((column (let ((cells (org-element-contents row))) (- (length cells) (length (memq table-cell cells)))))) (mapc (lambda (row) (unless (eq (org-element-property :type row) 'rule) (when (equal (org-element-contents (car (org-element-contents row))) '("/")) (let ((column-groups (mapcar (lambda (cell) (let ((value (org-element-contents cell))) (when (member value '(("<") ("<>") (">") nil)) (car value)))) (org-element-contents row)))) ;; There's a left border when previous cell, if ;; any, ends a group, or current one starts one. (when (or (and (not (zerop column)) (member (elt column-groups (1- column)) '(">" "<>"))) (member (elt column-groups column) '("<" "<>"))) (push 'left borders)) ;; There's a right border when next cell, if any, ;; starts a group, or current one ends one. (when (or (and (/= (1+ column) (length column-groups)) (member (elt column-groups (1+ column)) '("<" "<>"))) (member (elt column-groups column) '(">" "<>"))) (push 'right borders)) (throw 'exit nil))))) ;; Table rows are read in reverse order so last column groups ;; row has precedence over any previous one. (reverse (org-element-contents table))))) ;; Return value. borders)) (defun org-export-table-cell-starts-colgroup-p (table-cell info) "Non-nil when TABLE-CELL is at the beginning of a row group. INFO is a plist used as a communication channel." ;; A cell starts a column group either when it is at the beginning ;; of a row (or after the special column, if any) or when it has ;; a left border. (or (eq (org-element-map (org-export-get-parent table-cell) 'table-cell 'identity info 'first-match) table-cell) (memq 'left (org-export-table-cell-borders table-cell info)))) (defun org-export-table-cell-ends-colgroup-p (table-cell info) "Non-nil when TABLE-CELL is at the end of a row group. INFO is a plist used as a communication channel." ;; A cell ends a column group either when it is at the end of a row ;; or when it has a right border. (or (eq (car (last (org-element-contents (org-export-get-parent table-cell)))) table-cell) (memq 'right (org-export-table-cell-borders table-cell info)))) (defun org-export-table-row-starts-rowgroup-p (table-row info) "Non-nil when TABLE-ROW is at the beginning of a column group. INFO is a plist used as a communication channel." (unless (or (eq (org-element-property :type table-row) 'rule) (org-export-table-row-is-special-p table-row info)) (let ((borders (org-export-table-cell-borders (car (org-element-contents table-row)) info))) (or (memq 'top borders) (memq 'above borders))))) (defun org-export-table-row-ends-rowgroup-p (table-row info) "Non-nil when TABLE-ROW is at the end of a column group. INFO is a plist used as a communication channel." (unless (or (eq (org-element-property :type table-row) 'rule) (org-export-table-row-is-special-p table-row info)) (let ((borders (org-export-table-cell-borders (car (org-element-contents table-row)) info))) (or (memq 'bottom borders) (memq 'below borders))))) (defun org-export-table-row-starts-header-p (table-row info) "Non-nil when TABLE-ROW is the first table header's row. INFO is a plist used as a communication channel." (and (org-export-table-has-header-p (org-export-get-parent-table table-row) info) (org-export-table-row-starts-rowgroup-p table-row info) (= (org-export-table-row-group table-row info) 1))) (defun org-export-table-row-ends-header-p (table-row info) "Non-nil when TABLE-ROW is the last table header's row. INFO is a plist used as a communication channel." (and (org-export-table-has-header-p (org-export-get-parent-table table-row) info) (org-export-table-row-ends-rowgroup-p table-row info) (= (org-export-table-row-group table-row info) 1))) (defun org-export-table-dimensions (table info) "Return TABLE dimensions. INFO is a plist used as a communication channel. Return value is a CONS like (ROWS . COLUMNS) where ROWS (resp. COLUMNS) is the number of exportable rows (resp. columns)." (let (first-row (columns 0) (rows 0)) ;; Set number of rows, and extract first one. (org-element-map table 'table-row (lambda (row) (when (eq (org-element-property :type row) 'standard) (incf rows) (unless first-row (setq first-row row)))) info) ;; Set number of columns. (org-element-map first-row 'table-cell (lambda (cell) (incf columns)) info) ;; Return value. (cons rows columns))) (defun org-export-table-cell-address (table-cell info) "Return address of a regular TABLE-CELL object. TABLE-CELL is the cell considered. INFO is a plist used as a communication channel. Address is a CONS cell (ROW . COLUMN), where ROW and COLUMN are zero-based index. Only exportable cells are considered. The function returns nil for other cells." (let* ((table-row (org-export-get-parent table-cell)) (table (org-export-get-parent-table table-cell))) ;; Ignore cells in special rows or in special column. (unless (or (org-export-table-row-is-special-p table-row info) (and (org-export-table-has-special-column-p table) (eq (car (org-element-contents table-row)) table-cell))) (cons ;; Row number. (let ((row-count 0)) (org-element-map table 'table-row (lambda (row) (cond ((eq (org-element-property :type row) 'rule) nil) ((eq row table-row) row-count) (t (incf row-count) nil))) info 'first-match)) ;; Column number. (let ((col-count 0)) (org-element-map table-row 'table-cell (lambda (cell) (if (eq cell table-cell) col-count (incf col-count) nil)) info 'first-match)))))) (defun org-export-get-table-cell-at (address table info) "Return regular table-cell object at ADDRESS in TABLE. Address is a CONS cell (ROW . COLUMN), where ROW and COLUMN are zero-based index. TABLE is a table type element. INFO is a plist used as a communication channel. If no table-cell, among exportable cells, is found at ADDRESS, return nil." (let ((column-pos (cdr address)) (column-count 0)) (org-element-map ;; Row at (car address) or nil. (let ((row-pos (car address)) (row-count 0)) (org-element-map table 'table-row (lambda (row) (cond ((eq (org-element-property :type row) 'rule) nil) ((= row-count row-pos) row) (t (incf row-count) nil))) info 'first-match)) 'table-cell (lambda (cell) (if (= column-count column-pos) cell (incf column-count) nil)) info 'first-match))) ;;;; For Tables Of Contents ;; ;; `org-export-collect-headlines' builds a list of all exportable ;; headline elements, maybe limited to a certain depth. One can then ;; easily parse it and transcode it. ;; ;; Building lists of tables, figures or listings is quite similar. ;; Once the generic function `org-export-collect-elements' is defined, ;; `org-export-collect-tables', `org-export-collect-figures' and ;; `org-export-collect-listings' can be derived from it. (defun org-export-collect-headlines (info &optional n) "Collect headlines in order to build a table of contents. INFO is a plist used as a communication channel. When optional argument N is an integer, it specifies the depth of the table of contents. Otherwise, it is set to the value of the last headline level. See `org-export-headline-levels' for more information. Return a list of all exportable headlines as parsed elements." (unless (wholenump n) (setq n (plist-get info :headline-levels))) (org-element-map (plist-get info :parse-tree) 'headline (lambda (headline) ;; Strip contents from HEADLINE. (let ((relative-level (org-export-get-relative-level headline info))) (unless (> relative-level n) headline))) info)) (defun org-export-collect-elements (type info &optional predicate) "Collect referenceable elements of a determined type. TYPE can be a symbol or a list of symbols specifying element types to search. Only elements with a caption are collected. INFO is a plist used as a communication channel. When non-nil, optional argument PREDICATE is a function accepting one argument, an element of type TYPE. It returns a non-nil value when that element should be collected. Return a list of all elements found, in order of appearance." (org-element-map (plist-get info :parse-tree) type (lambda (element) (and (org-element-property :caption element) (or (not predicate) (funcall predicate element)) element)) info)) (defun org-export-collect-tables (info) "Build a list of tables. INFO is a plist used as a communication channel. Return a list of table elements with a caption." (org-export-collect-elements 'table info)) (defun org-export-collect-figures (info predicate) "Build a list of figures. INFO is a plist used as a communication channel. PREDICATE is a function which accepts one argument: a paragraph element and whose return value is non-nil when that element should be collected. A figure is a paragraph type element, with a caption, verifying PREDICATE. The latter has to be provided since a \"figure\" is a vague concept that may depend on back-end. Return a list of elements recognized as figures." (org-export-collect-elements 'paragraph info predicate)) (defun org-export-collect-listings (info) "Build a list of src blocks. INFO is a plist used as a communication channel. Return a list of src-block elements with a caption." (org-export-collect-elements 'src-block info)) ;;;; Topology ;; ;; Here are various functions to retrieve information about the ;; neighbourhood of a given element or object. Neighbours of interest ;; are direct parent (`org-export-get-parent'), parent headline ;; (`org-export-get-parent-headline'), first element containing an ;; object, (`org-export-get-parent-element'), parent table ;; (`org-export-get-parent-table'), previous element or object ;; (`org-export-get-previous-element') and next element or object ;; (`org-export-get-next-element'). ;; ;; `org-export-get-genealogy' returns the full genealogy of a given ;; element or object, from closest parent to full parse tree. (defun org-export-get-parent (blob) "Return BLOB parent or nil. BLOB is the element or object considered." (org-element-property :parent blob)) (defun org-export-get-genealogy (blob) "Return full genealogy relative to a given element or object. BLOB is the element or object being considered. Ancestors are returned from closest to farthest, the last one being the full parse tree." (let (genealogy (parent blob)) (while (setq parent (org-element-property :parent parent)) (push parent genealogy)) (nreverse genealogy))) (defun org-export-get-parent-headline (blob) "Return BLOB parent headline or nil. BLOB is the element or object being considered." (let ((parent blob)) (while (and (setq parent (org-element-property :parent parent)) (not (eq (org-element-type parent) 'headline)))) parent)) (defun org-export-get-parent-element (object) "Return first element containing OBJECT or nil. OBJECT is the object to consider." (let ((parent object)) (while (and (setq parent (org-element-property :parent parent)) (memq (org-element-type parent) org-element-all-objects))) parent)) (defun org-export-get-parent-table (object) "Return OBJECT parent table or nil. OBJECT is either a `table-cell' or `table-element' type object." (let ((parent object)) (while (and (setq parent (org-element-property :parent parent)) (not (eq (org-element-type parent) 'table)))) parent)) (defun org-export-get-previous-element (blob info) "Return previous element or object. BLOB is an element or object. INFO is a plist used as a communication channel. Return previous exportable element or object, a string, or nil." (let (prev) (catch 'exit (mapc (lambda (obj) (cond ((eq obj blob) (throw 'exit prev)) ((memq obj (plist-get info :ignore-list))) (t (setq prev obj)))) (org-element-contents (org-export-get-parent blob)))))) (defun org-export-get-next-element (blob info) "Return next element or object. BLOB is an element or object. INFO is a plist used as a communication channel. Return next exportable element or object, a string, or nil." (catch 'found (mapc (lambda (obj) (unless (memq obj (plist-get info :ignore-list)) (throw 'found obj))) (cdr (memq blob (org-element-contents (org-export-get-parent blob))))) nil)) ;;;; Translation ;; ;; `org-export-translate' translates a string according to language ;; specified by LANGUAGE keyword or `org-export-language-setup' ;; variable and a specified charset. `org-export-dictionary' contains ;; the dictionary used for the translation. (defconst org-export-dictionary '(("Author" ("ca" :default "Autor") ("cs" :default "Autor") ("da" :default "Ophavsmand") ("de" :default "Autor") ("eo" :html "Aŭtoro") ("es" :default "Autor") ("fi" :html "Tekijä") ("fr" :default "Auteur") ("hu" :default "Szerzõ") ("is" :html "Höfundur") ("it" :default "Autore") ("ja" :html "著者" :utf-8 "著者") ("nl" :default "Auteur") ("no" :default "Forfatter") ("nb" :default "Forfatter") ("nn" :default "Forfattar") ("pl" :default "Autor") ("ru" :html "Автор" :utf-8 "Автор") ("sv" :html "Författare") ("uk" :html "Автор" :utf-8 "Автор") ("zh-CN" :html "作者" :utf-8 "作者") ("zh-TW" :html "作者" :utf-8 "作者")) ("Date" ("ca" :default "Data") ("cs" :default "Datum") ("da" :default "Dato") ("de" :default "Datum") ("eo" :default "Dato") ("es" :default "Fecha") ("fi" :html "Päivämäärä") ("hu" :html "Dátum") ("is" :default "Dagsetning") ("it" :default "Data") ("ja" :html "日付" :utf-8 "日付") ("nl" :default "Datum") ("no" :default "Dato") ("nb" :default "Dato") ("nn" :default "Dato") ("pl" :default "Data") ("ru" :html "Дата" :utf-8 "Дата") ("sv" :default "Datum") ("uk" :html "Дата" :utf-8 "Дата") ("zh-CN" :html "日期" :utf-8 "日期") ("zh-TW" :html "日期" :utf-8 "日期")) ("Equation" ("fr" :ascii "Equation" :default "Équation")) ("Figure") ("Footnotes" ("ca" :html "Peus de pàgina") ("cs" :default "Pozn\xe1mky pod carou") ("da" :default "Fodnoter") ("de" :html "Fußnoten") ("eo" :default "Piednotoj") ("es" :html "Pies de página") ("fi" :default "Alaviitteet") ("fr" :default "Notes de bas de page") ("hu" :html "Lábjegyzet") ("is" :html "Aftanmálsgreinar") ("it" :html "Note a piè di pagina") ("ja" :html "脚注" :utf-8 "脚注") ("nl" :default "Voetnoten") ("no" :default "Fotnoter") ("nb" :default "Fotnoter") ("nn" :default "Fotnotar") ("pl" :default "Przypis") ("ru" :html "Сноски" :utf-8 "Сноски") ("sv" :default "Fotnoter") ("uk" :html "Примітки" :utf-8 "Примітки") ("zh-CN" :html "脚注" :utf-8 "脚注") ("zh-TW" :html "腳註" :utf-8 "腳註")) ("List of Listings" ("fr" :default "Liste des programmes")) ("List of Tables" ("fr" :default "Liste des tableaux")) ("Listing %d:" ("fr" :ascii "Programme %d :" :default "Programme nº %d :" :latin1 "Programme %d :")) ("Listing %d: %s" ("fr" :ascii "Programme %d : %s" :default "Programme nº %d : %s" :latin1 "Programme %d : %s")) ("See section %s" ("fr" :default "cf. section %s")) ("Table %d:" ("fr" :ascii "Tableau %d :" :default "Tableau nº %d :" :latin1 "Tableau %d :")) ("Table %d: %s" ("fr" :ascii "Tableau %d : %s" :default "Tableau nº %d : %s" :latin1 "Tableau %d : %s")) ("Table of Contents" ("ca" :html "Índex") ("cs" :default "Obsah") ("da" :default "Indhold") ("de" :default "Inhaltsverzeichnis") ("eo" :default "Enhavo") ("es" :html "Índice") ("fi" :html "Sisällysluettelo") ("fr" :ascii "Sommaire" :default "Table des matières") ("hu" :html "Tartalomjegyzék") ("is" :default "Efnisyfirlit") ("it" :default "Indice") ("ja" :html "目次" :utf-8 "目次") ("nl" :default "Inhoudsopgave") ("no" :default "Innhold") ("nb" :default "Innhold") ("nn" :default "Innhald") ("pl" :html "Spis treści") ("ru" :html "Содержание" :utf-8 "Содержание") ("sv" :html "Innehåll") ("uk" :html "Зміст" :utf-8 "Зміст") ("zh-CN" :html "目录" :utf-8 "目录") ("zh-TW" :html "目錄" :utf-8 "目錄")) ("Unknown reference" ("fr" :ascii "Destination inconnue" :default "Référence inconnue"))) "Dictionary for export engine. Alist whose CAR is the string to translate and CDR is an alist whose CAR is the language string and CDR is a plist whose properties are possible charsets and values translated terms. It is used as a database for `org-export-translate'. Since this function returns the string as-is if no translation was found, the variable only needs to record values different from the entry.") (defun org-export-translate (s encoding info) "Translate string S according to language specification. ENCODING is a symbol among `:ascii', `:html', `:latex', `:latin1' and `:utf-8'. INFO is a plist used as a communication channel. Translation depends on `:language' property. Return the translated string. If no translation is found, try to fall back to `:default' encoding. If it fails, return S." (let* ((lang (plist-get info :language)) (translations (cdr (assoc lang (cdr (assoc s org-export-dictionary)))))) (or (plist-get translations encoding) (plist-get translations :default) s))) ;;; The Dispatcher ;; ;; `org-export-dispatch' is the standard interactive way to start an ;; export process. It uses `org-export-dispatch-ui' as a subroutine ;; for its interface, which, in turn, delegates response to key ;; pressed to `org-export-dispatch-action'. (defvar org-export-dispatch-menu-entries nil "List of menu entries available for `org-export-dispatch'. This variable shouldn't be set directly. Set-up :menu-entry keyword in either `org-export-define-backend' or `org-export-define-derived-backend' instead.") ;;;###autoload (defun org-export-dispatch () "Export dispatcher for Org mode. It provides an access to common export related tasks in a buffer. Its interface comes in two flavours: standard and expert. While both share the same set of bindings, only the former displays the valid keys associations. Set `org-export-dispatch-use-expert-ui' to switch to one or the other. Return an error if key pressed has no associated command." (interactive) (let* ((input (org-export-dispatch-ui (list org-export-initial-scope) nil org-export-dispatch-use-expert-ui)) (action (car input)) (optns (cdr input))) (case action ;; First handle special hard-coded actions. (publish-current-file (org-e-publish-current-file (memq 'force optns))) (publish-current-project (org-e-publish-current-project (memq 'force optns))) (publish-choose-project (org-e-publish (assoc (org-icompleting-read "Publish project: " org-e-publish-project-alist nil t) org-e-publish-project-alist) (memq 'force optns))) (publish-all (org-e-publish-all (memq 'force optns))) (otherwise (funcall action (memq 'subtree optns) (memq 'visible optns) (memq 'body optns)))))) (defun org-export-dispatch-ui (options first-key expertp) "Handle interface for `org-export-dispatch'. OPTIONS is a list containing current interactive options set for export. It can contain any of the following symbols: `body' toggles a body-only export `subtree' restricts export to current subtree `visible' restricts export to visible part of buffer. `force' force publishing files. FIRST-KEY is the key pressed to select the first level menu. It is nil when this menu hasn't been selected yet. EXPERTP, when non-nil, triggers expert UI. In that case, no help buffer is provided, but indications about currently active options are given in the prompt. Moreover, \[?] allows to switch back to standard interface." (let* ((fontify-key (lambda (key &optional access-key) ;; Fontify KEY string. Optional argument ACCESS-KEY, when ;; non-nil is the required first-level key to activate ;; KEY. When its value is t, activate KEY independently ;; on the first key, if any. A nil value means KEY will ;; only be activated at first level. (if (or (eq access-key t) (eq access-key first-key)) (org-add-props key nil 'face 'org-warning) (org-no-properties key)))) ;; Make sure order of menu doesn't depend on the order in ;; which back-ends are loaded. (backends (sort (copy-sequence org-export-dispatch-menu-entries) (lambda (a b) (< (car a) (car b))))) ;; Compute a list of allowed keys based on the first key ;; pressed, if any. Some keys (?1, ?2, ?3, ?4 and ?q) are ;; always available. (allowed-keys (nconc (list ?1 ?2 ?3 ?4) (mapcar 'car (if (not first-key) backends (nth 2 (assq first-key backends)))) (cond ((eq first-key ?P) (list ?f ?p ?x ?a)) ((not first-key) (list ?P))) (when expertp (list ??)) (list ?q))) ;; Build the help menu for standard UI. (help (unless expertp (concat ;; Options are hard-coded. (format "Options [%s] Body only: %s [%s] Visible only: %s [%s] Export scope: %s [%s] Force publishing: %s\n\n" (funcall fontify-key "1" t) (if (memq 'body options) "On " "Off") (funcall fontify-key "2" t) (if (memq 'visible options) "On " "Off") (funcall fontify-key "3" t) (if (memq 'subtree options) "Subtree" "Buffer ") (funcall fontify-key "4" t) (if (memq 'force options) "On " "Off")) ;; Display registered back-end entries. (mapconcat (lambda (entry) (let ((top-key (car entry))) (concat (format "[%s] %s\n" (funcall fontify-key (char-to-string top-key)) (nth 1 entry)) (let ((sub-menu (nth 2 entry))) (unless (functionp sub-menu) ;; Split sub-menu into two columns. (let ((index -1)) (concat (mapconcat (lambda (sub-entry) (incf index) (format (if (zerop (mod index 2)) " [%s] %-24s" "[%s] %s\n") (funcall fontify-key (char-to-string (car sub-entry)) top-key) (nth 1 sub-entry))) sub-menu "") (when (zerop (mod index 2)) "\n")))))))) backends "\n") ;; Publishing menu is hard-coded. (format "\n[%s] Publish [%s] Current file [%s] Current project [%s] Choose project [%s] All projects\n\n" (funcall fontify-key "P") (funcall fontify-key "f" ?P) (funcall fontify-key "p" ?P) (funcall fontify-key "x" ?P) (funcall fontify-key "a" ?P)) (format "\[%s] %s" (funcall fontify-key "q" t) (if first-key "Main menu" "Exit"))))) ;; Build prompts for both standard and expert UI. (standard-prompt (unless expertp "Export command: ")) (expert-prompt (when expertp (format "Export command (Options: %s%s%s%s) [%s]: " (if (memq 'body options) (funcall fontify-key "b" t) "-") (if (memq 'subtree options) (funcall fontify-key "s" t) "-") (if (memq 'visible options) (funcall fontify-key "v" t) "-") (if (memq 'force options) (funcall fontify-key "f" t) "-") (concat allowed-keys))))) ;; With expert UI, just read key with a fancy prompt. In standard ;; UI, display an intrusive help buffer. (if expertp (org-export-dispatch-action expert-prompt allowed-keys backends options first-key expertp) (save-window-excursion (delete-other-windows) (unwind-protect (progn (with-current-buffer (get-buffer-create "*Org Export Dispatcher*") (erase-buffer) (save-excursion (insert help))) (org-fit-window-to-buffer (display-buffer "*Org Export Dispatcher*")) (org-export-dispatch-action standard-prompt allowed-keys backends options first-key expertp)) (and (get-buffer "*Org Export Dispatcher*") (kill-buffer "*Org Export Dispatcher*"))))))) (defun org-export-dispatch-action (prompt allowed-keys backends options first-key expertp) "Read a character from command input and act accordingly. PROMPT is the displayed prompt, as a string. ALLOWED-KEYS is a list of characters available at a given step in the process. BACKENDS is a list of menu entries. OPTIONS, FIRST-KEY and EXPERTP are the same as defined in `org-export-dispatch-ui', which see. Toggle export options when required. Otherwise, return value is a list with action as CAR and a list of interactive export options as CDR." (let ((key (let ((k (read-char-exclusive prompt))) ;; Translate "C-a", "C-b"... into "a", "b"... Then take action ;; depending on user's key pressed. (if (< k 27) (+ k 96) k)))) (cond ;; Ignore non-standard characters (i.e. "M-a") and ;; undefined associations. ((not (memq key allowed-keys)) (org-export-dispatch-ui options first-key expertp)) ;; q key at first level aborts export. At second ;; level, cancel first key instead. ((eq key ?q) (if (not first-key) (error "Export aborted") (org-export-dispatch-ui options nil expertp))) ;; Help key: Switch back to standard interface if ;; expert UI was active. ((eq key ??) (org-export-dispatch-ui options first-key nil)) ;; Toggle export options. ((memq key '(?1 ?2 ?3 ?4)) (org-export-dispatch-ui (let ((option (case key (?1 'body) (?2 'visible) (?3 'subtree) (?4 'force)))) (if (memq option options) (remq option options) (cons option options))) first-key expertp)) ;; Action selected: Send key and options back to ;; `org-export-dispatch'. ((or first-key (and (eq first-key ?P) (memq key '(?f ?p ?x ?a))) (functionp (nth 2 (assq key backends)))) (cons (cond ((not first-key) (nth 2 (assq key backends))) ;; Publishing actions are hard-coded. Send a special ;; signal to `org-export-dispatch'. ((eq first-key ?P) (case key (?f 'publish-current-file) (?p 'publish-current-project) (?x 'publish-choose-project) (?a 'publish-all))) (t (nth 2 (assq key (nth 2 (assq first-key backends)))))) options)) ;; Otherwise, enter sub-menu. (t (org-export-dispatch-ui options key expertp))))) (provide 'org-export) ;;; org-export.el ends here