diff options
Diffstat (limited to 'elpa/org-9.5.2/ox-beamer.el')
| -rw-r--r-- | elpa/org-9.5.2/ox-beamer.el | 1158 |
1 files changed, 1158 insertions, 0 deletions
diff --git a/elpa/org-9.5.2/ox-beamer.el b/elpa/org-9.5.2/ox-beamer.el new file mode 100644 index 0000000..77de0aa --- /dev/null +++ b/elpa/org-9.5.2/ox-beamer.el @@ -0,0 +1,1158 @@ +;;; ox-beamer.el --- Beamer Back-End for Org Export Engine -*- lexical-binding: t; -*- + +;; Copyright (C) 2007-2021 Free Software Foundation, Inc. + +;; Author: Carsten Dominik <carsten.dominik AT gmail DOT com> +;; Nicolas Goaziou <n.goaziou AT gmail DOT com> +;; Maintainer: Nicolas Goaziou <n.goaziou at gmail dot com> +;; Keywords: org, wp, tex + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software: you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation, either version 3 of the License, or +;; (at your option) any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. + +;;; Commentary: +;; +;; This library implements both a Beamer back-end, derived from the +;; LaTeX one and a minor mode easing structure edition of the +;; document. See Org manual for more information. + +;;; Code: + +(require 'cl-lib) +(require 'ox-latex) + +;; Install a default set-up for Beamer export. +(unless (assoc "beamer" org-latex-classes) + (add-to-list 'org-latex-classes + '("beamer" + "\\documentclass[presentation]{beamer}" + ("\\section{%s}" . "\\section*{%s}") + ("\\subsection{%s}" . "\\subsection*{%s}") + ("\\subsubsection{%s}" . "\\subsubsection*{%s}")))) + + + +;;; User-Configurable Variables + +(defgroup org-export-beamer nil + "Options specific for using the beamer class in LaTeX export." + :tag "Org Beamer" + :group 'org-export + :version "24.2") + +(defcustom org-beamer-frame-level 1 + "The level at which headlines become frames. + +Headlines at a lower level will be translated into a sectioning +structure. At a higher level, they will be translated into +blocks. + +If a headline with a \"BEAMER_env\" property set to \"frame\" is +found within a tree, its level locally overrides this number. + +This variable has no effect on headlines with the \"BEAMER_env\" +property set to either \"ignoreheading\", \"appendix\", or +\"note\", which will respectively, be invisible, become an +appendix or a note. + +This integer is relative to the minimal level of a headline +within the parse tree, defined as 1." + :group 'org-export-beamer + :type 'integer) + +(defcustom org-beamer-frame-default-options "" + "Default options string to use for frames. +For example, it could be set to \"allowframebreaks\"." + :group 'org-export-beamer + :type '(string :tag "[options]")) + +(defcustom org-beamer-column-view-format + "%45ITEM %10BEAMER_env(Env) %10BEAMER_act(Act) %4BEAMER_col(Col) %8BEAMER_opt(Opt)" + "Column view format that should be used to fill the template." + :group 'org-export-beamer + :version "24.4" + :package-version '(Org . "8.0") + :type '(choice + (const :tag "Do not insert Beamer column view format" nil) + (string :tag "Beamer column view format"))) + +(defcustom org-beamer-theme "default" + "Default theme used in Beamer presentations." + :group 'org-export-beamer + :version "24.4" + :package-version '(Org . "8.0") + :type '(choice + (const :tag "Do not insert a Beamer theme" nil) + (string :tag "Beamer theme"))) + +(defcustom org-beamer-environments-extra nil + "Environments triggered by tags in Beamer export. +Each entry has 4 elements: + +name Name of the environment +key Selection key for `org-beamer-select-environment' +open The opening template for the environment, with the following escapes + %a the action/overlay specification + %A the default action/overlay specification + %R the raw BEAMER_act value + %o the options argument, with square brackets + %O the raw BEAMER_opt value + %h the headline text + %r the raw headline text (i.e. without any processing) + %H if there is headline text, that raw text in {} braces + %U if there is headline text, that raw text in [] brackets +close The closing string of the environment." + :group 'org-export-beamer + :version "24.4" + :package-version '(Org . "8.1") + :type '(repeat + (list + (string :tag "Environment") + (string :tag "Selection key") + (string :tag "Begin") + (string :tag "End")))) + +(defcustom org-beamer-outline-frame-title "Outline" + "Default title of a frame containing an outline." + :group 'org-export-beamer + :type '(string :tag "Outline frame title")) + +(defcustom org-beamer-outline-frame-options "" + "Outline frame options appended after \\begin{frame}. +You might want to put e.g. \"allowframebreaks=0.9\" here." + :group 'org-export-beamer + :type '(string :tag "Outline frame options")) + + +(defcustom org-beamer-subtitle-format "\\subtitle{%s}" + "Format string used for transcoded subtitle. +The format string should have at most one \"%s\"-expression, +which is replaced with the subtitle." + :group 'org-export-beamer + :version "26.1" + :package-version '(Org . "8.3") + :type '(string :tag "Format string")) + + +;;; Internal Variables + +(defconst org-beamer-column-widths + "0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.0 :ETC" + "The column widths that should be installed as allowed property values.") + +(defconst org-beamer-environments-special + '(("againframe" "A") + ("appendix" "x") + ("column" "c") + ("columns" "C") + ("frame" "f") + ("fullframe" "F") + ("ignoreheading" "i") + ("note" "n") + ("noteNH" "N")) + "Alist of environments treated in a special way by the back-end. +Keys are environment names, as strings, values are bindings used +in `org-beamer-select-environment'. Environments listed here, +along with their binding, are hard coded and cannot be modified +through `org-beamer-environments-extra' variable.") + +(defconst org-beamer-environments-default + '(("block" "b" "\\begin{block}%a{%h}" "\\end{block}") + ("alertblock" "a" "\\begin{alertblock}%a{%h}" "\\end{alertblock}") + ("verse" "v" "\\begin{verse}%a %% %h" "\\end{verse}") + ("quotation" "q" "\\begin{quotation}%a %% %h" "\\end{quotation}") + ("quote" "Q" "\\begin{quote}%a %% %h" "\\end{quote}") + ("structureenv" "s" "\\begin{structureenv}%a %% %h" "\\end{structureenv}") + ("theorem" "t" "\\begin{theorem}%a[%h]" "\\end{theorem}") + ("definition" "d" "\\begin{definition}%a[%h]" "\\end{definition}") + ("example" "e" "\\begin{example}%a[%h]" "\\end{example}") + ("exampleblock" "E" "\\begin{exampleblock}%a{%h}" "\\end{exampleblock}") + ("proof" "p" "\\begin{proof}%a[%h]" "\\end{proof}") + ("beamercolorbox" "o" "\\begin{beamercolorbox}%o{%h}" "\\end{beamercolorbox}")) + "Environments triggered by properties in Beamer export. +These are the defaults - for user definitions, see +`org-beamer-environments-extra'.") + +(defconst org-beamer-verbatim-elements + '(code example-block fixed-width inline-src-block src-block verbatim) + "List of element or object types producing verbatim text. +This is used internally to determine when a frame should have the +\"fragile\" option.") + + + +;;; Internal functions + +(defun org-beamer--normalize-argument (argument type) + "Return ARGUMENT string with proper boundaries. + +TYPE is a symbol among the following: +`action' Return ARGUMENT within angular brackets. +`defaction' Return ARGUMENT within both square and angular brackets. +`option' Return ARGUMENT within square brackets." + (if (not (string-match "\\S-" argument)) "" + (cl-case type + (action (format "<%s>" (org-unbracket-string "<" ">" argument))) + (defaction + (format "[<%s>]" + (org-unbracket-string "<" ">" (org-unbracket-string "[" "]" argument)))) + (option (format "[%s]" (org-unbracket-string "[" "]" argument))) + (otherwise (error "Invalid `type' argument to `org-beamer--normalize-argument': %s" + type))))) + +(defun org-beamer--element-has-overlay-p (element) + "Non-nil when ELEMENT has an overlay specified. +An element has an overlay specification when it starts with an +`beamer' export-snippet whose value is between angular brackets. +Return overlay specification, as a string, or nil." + (let ((first-object (car (org-element-contents element)))) + (when (eq (org-element-type first-object) 'export-snippet) + (let ((value (org-element-property :value first-object))) + (and (string-prefix-p "<" value) (string-suffix-p ">" value) + value))))) + + + +;;; Define Back-End + +(org-export-define-derived-backend 'beamer 'latex + :menu-entry + '(?l 1 + ((?B "As LaTeX buffer (Beamer)" org-beamer-export-as-latex) + (?b "As LaTeX file (Beamer)" org-beamer-export-to-latex) + (?P "As PDF file (Beamer)" org-beamer-export-to-pdf) + (?O "As PDF file and open (Beamer)" + (lambda (a s v b) + (if a (org-beamer-export-to-pdf t s v b) + (org-open-file (org-beamer-export-to-pdf nil s v b))))))) + :options-alist + '((:headline-levels nil "H" org-beamer-frame-level) + (:latex-class "LATEX_CLASS" nil "beamer" t) + (:beamer-subtitle-format nil nil org-beamer-subtitle-format) + (:beamer-column-view-format "COLUMNS" nil org-beamer-column-view-format) + (:beamer-theme "BEAMER_THEME" nil org-beamer-theme) + (:beamer-color-theme "BEAMER_COLOR_THEME" nil nil t) + (:beamer-font-theme "BEAMER_FONT_THEME" nil nil t) + (:beamer-inner-theme "BEAMER_INNER_THEME" nil nil t) + (:beamer-outer-theme "BEAMER_OUTER_THEME" nil nil t) + (:beamer-header "BEAMER_HEADER" nil nil newline) + (:beamer-environments-extra nil nil org-beamer-environments-extra) + (:beamer-frame-default-options nil nil org-beamer-frame-default-options) + (:beamer-outline-frame-options nil nil org-beamer-outline-frame-options) + (:beamer-outline-frame-title nil nil org-beamer-outline-frame-title)) + :translate-alist '((bold . org-beamer-bold) + (export-block . org-beamer-export-block) + (export-snippet . org-beamer-export-snippet) + (headline . org-beamer-headline) + (item . org-beamer-item) + (keyword . org-beamer-keyword) + (link . org-beamer-link) + (plain-list . org-beamer-plain-list) + (radio-target . org-beamer-radio-target) + (template . org-beamer-template))) + + + +;;; Transcode Functions + +;;;; Bold + +(defun org-beamer-bold (bold contents _info) + "Transcode BLOCK object into Beamer code. +CONTENTS is the text being bold. INFO is a plist used as +a communication channel." + (format "\\alert%s{%s}" + (or (org-beamer--element-has-overlay-p bold) "") + contents)) + + +;;;; Export Block + +(defun org-beamer-export-block (export-block _contents _info) + "Transcode an EXPORT-BLOCK element into Beamer code. +CONTENTS is nil. INFO is a plist used as a communication +channel." + (when (member (org-element-property :type export-block) '("BEAMER" "LATEX")) + (org-remove-indentation (org-element-property :value export-block)))) + + +;;;; Export Snippet + +(defun org-beamer-export-snippet (export-snippet _contents info) + "Transcode an EXPORT-SNIPPET object into Beamer code. +CONTENTS is nil. INFO is a plist used as a communication +channel." + (let ((backend (org-export-snippet-backend export-snippet)) + (value (org-element-property :value export-snippet))) + ;; Only "latex" and "beamer" snippets are retained. + (cond ((eq backend 'latex) value) + ;; Ignore "beamer" snippets specifying overlays. + ((and (eq backend 'beamer) + (or (org-export-get-previous-element export-snippet info) + (not (string-match "\\`<.*>\\'" value)))) + value)))) + + +;;;; Headline +;; +;; The main function to translate a headline is +;; `org-beamer-headline'. +;; +;; Depending on the level at which a headline is considered as +;; a frame (given by `org-beamer--frame-level'), the headline is +;; either a section (`org-beamer--format-section'), a frame +;; (`org-beamer--format-frame') or a block +;; (`org-beamer--format-block'). +;; +;; `org-beamer-headline' also takes care of special environments +;; like "ignoreheading", "note", "noteNH", "appendix" and +;; "againframe". + +(defun org-beamer--get-label (headline info) + "Return label for HEADLINE, as a string. + +INFO is a plist used as a communication channel. + +The value is either the label specified in \"BEAMER_opt\" +property, the custom ID, if there is one and +`:latex-prefer-user-labels' property has a non-nil value, or +a unique internal label. This function assumes HEADLINE will be +treated as a frame." + (cond + ((let ((opt (org-element-property :BEAMER_OPT headline))) + (and (stringp opt) + (string-match "\\(?:^\\|,\\)label=\\(.*?\\)\\(?:$\\|,\\)" opt) + (let ((label (match-string 1 opt))) + (if (string-match-p "\\`{.*}\\'" label) + (substring label 1 -1) + label))))) + ((and (plist-get info :latex-prefer-user-labels) + (org-element-property :CUSTOM_ID headline))) + (t (format "sec:%s" (org-export-get-reference headline info))))) + +(defun org-beamer--frame-level (headline info) + "Return frame level in subtree containing HEADLINE. +INFO is a plist used as a communication channel." + (or + ;; 1. Look for "frame" environment in parents, starting from the + ;; farthest. + (catch 'exit + (dolist (parent (nreverse (org-element-lineage headline))) + (let ((env (org-element-property :BEAMER_ENV parent))) + (when (and env (member-ignore-case env '("frame" "fullframe"))) + (throw 'exit (org-export-get-relative-level parent info)))))) + ;; 2. Look for "frame" environment in HEADLINE. + (let ((env (org-element-property :BEAMER_ENV headline))) + (and env (member-ignore-case env '("frame" "fullframe")) + (org-export-get-relative-level headline info))) + ;; 3. Look for "frame" environment in sub-tree. + (org-element-map headline 'headline + (lambda (hl) + (let ((env (org-element-property :BEAMER_ENV hl))) + (when (and env (member-ignore-case env '("frame" "fullframe"))) + (org-export-get-relative-level hl info)))) + info 'first-match) + ;; 4. No "frame" environment in tree: use default value. + (plist-get info :headline-levels))) + +(defun org-beamer--format-section (headline contents info) + "Format HEADLINE as a sectioning part. +CONTENTS holds the contents of the headline. INFO is a plist +used as a communication channel." + (let ((latex-headline + (org-export-with-backend + ;; We create a temporary export back-end which behaves the + ;; same as current one, but adds "\protect" in front of the + ;; output of some objects. + (org-export-create-backend + :parent 'latex + :transcoders + (let ((protected-output + (lambda (object contents info) + (let ((code (org-export-with-backend + 'beamer object contents info))) + (if (org-string-nw-p code) (concat "\\protect" code) + code))))) + (mapcar (lambda (type) (cons type protected-output)) + '(bold footnote-reference italic strike-through timestamp + underline)))) + headline + contents + info)) + (mode-specs (org-element-property :BEAMER_ACT headline))) + (if (and mode-specs + (string-match "\\`\\\\\\(.*?\\)\\(?:\\*\\|\\[.*\\]\\)?{" + latex-headline)) + ;; Insert overlay specifications. + (replace-match (concat (match-string 1 latex-headline) + (format "<%s>" mode-specs)) + nil nil latex-headline 1) + latex-headline))) + +(defun org-beamer--format-frame (headline contents info) + "Format HEADLINE as a frame. +CONTENTS holds the contents of the headline. INFO is a plist +used as a communication channel." + (let ((fragilep + ;; FRAGILEP is non-nil when HEADLINE contains an element + ;; among `org-beamer-verbatim-elements'. + (org-element-map headline org-beamer-verbatim-elements 'identity + info 'first-match))) + (concat "\\begin{frame}" + ;; Overlay specification, if any. When surrounded by + ;; square brackets, consider it as a default + ;; specification. + (let ((action (org-element-property :BEAMER_ACT headline))) + (cond + ((not action) "") + ((string-match "\\`\\[.*\\]\\'" action ) + (org-beamer--normalize-argument action 'defaction)) + (t (org-beamer--normalize-argument action 'action)))) + ;; Options, if any. + (let* ((beamer-opt (org-element-property :BEAMER_OPT headline)) + (options + ;; Collect nonempty options from default value and + ;; headline's properties. + (cl-remove-if-not #'org-string-nw-p + (append + (org-split-string + (plist-get info :beamer-frame-default-options) ",") + (and beamer-opt + (org-split-string + ;; Remove square brackets if user provided + ;; them. + (and (string-match "^\\[?\\(.*\\)\\]?$" beamer-opt) + (match-string 1 beamer-opt)) + ","))))) + (fragile + ;; Add "fragile" option if necessary. + (and fragilep + (not (member "fragile" options)) + (list "fragile"))) + (label + ;; Provide an automatic label for the frame unless + ;; the user specified one. Also refrain from + ;; labeling `allowframebreaks' frames; this is not + ;; allowed by Beamer. + (and (not (member "allowframebreaks" options)) + (not (cl-some (lambda (s) (string-match-p "^label=" s)) + options)) + (list + (let ((label (org-beamer--get-label headline info))) + ;; Labels containing colons need to be + ;; wrapped within braces. + (format (if (string-match-p ":" label) + "label={%s}" + "label=%s") + label)))))) + ;; Change options list into a string. + (org-beamer--normalize-argument + (mapconcat #'identity (append label fragile options) ",") + 'option)) + ;; Title. + (let ((env (org-element-property :BEAMER_ENV headline))) + (format "{%s}" + (if (and env (equal (downcase env) "fullframe")) "" + (org-export-data + (org-element-property :title headline) info)))) + "\n" + ;; The following workaround is required in fragile frames + ;; as Beamer will append "\par" to the beginning of the + ;; contents. So we need to make sure the command is + ;; separated from the contents by at least one space. If + ;; it isn't, it will create "\parfirst-word" command and + ;; remove the first word from the contents in the PDF + ;; output. + (if (not fragilep) contents + (replace-regexp-in-string "\\`\n*" "\\& " (or contents ""))) + "\\end{frame}"))) + +(defun org-beamer--format-block (headline contents info) + "Format HEADLINE as a block. +CONTENTS holds the contents of the headline. INFO is a plist +used as a communication channel." + (let* ((column-width (org-element-property :BEAMER_COL headline)) + ;; ENVIRONMENT defaults to "block" if none is specified and + ;; there is no column specification. If there is a column + ;; specified but still no explicit environment, ENVIRONMENT + ;; is "column". + (environment (let ((env (org-element-property :BEAMER_ENV headline))) + (cond + ;; "block" is the fallback environment. + ((and (not env) (not column-width)) "block") + ;; "column" only. + ((not env) "column") + ;; Use specified environment. + (t env)))) + (raw-title (org-element-property :raw-value headline)) + (env-format + (cond ((member environment '("column" "columns")) nil) + ((assoc environment + (append (plist-get info :beamer-environments-extra) + org-beamer-environments-default))) + (t (user-error "Wrong block type at a headline named \"%s\"" + raw-title)))) + (title (org-export-data (org-element-property :title headline) info)) + (raw-options (org-element-property :BEAMER_OPT headline)) + (options (if raw-options + (org-beamer--normalize-argument raw-options 'option) + "")) + ;; Start a "columns" environment when explicitly requested or + ;; when there is no previous headline or the previous + ;; headline do not have a BEAMER_column property. + (parent-env (org-element-property + :BEAMER_ENV (org-export-get-parent-headline headline))) + (start-columns-p + (or (equal environment "columns") + (and column-width + (not (and parent-env + (equal (downcase parent-env) "columns"))) + (or (org-export-first-sibling-p headline info) + (not (org-element-property + :BEAMER_COL + (org-export-get-previous-element + headline info))))))) + ;; End the "columns" environment when explicitly requested or + ;; when there is no next headline or the next headline do not + ;; have a BEAMER_column property. + (end-columns-p + (or (equal environment "columns") + (and column-width + (not (and parent-env + (equal (downcase parent-env) "columns"))) + (or (org-export-last-sibling-p headline info) + (not (org-element-property + :BEAMER_COL + (org-export-get-next-element headline info)))))))) + (concat + (when start-columns-p + ;; Column can accept options only when the environment is + ;; explicitly defined. + (if (not (equal environment "columns")) "\\begin{columns}\n" + (format "\\begin{columns}%s\n" options))) + (when column-width + (format "\\begin{column}%s{%s}\n" + ;; One can specify placement for column only when + ;; HEADLINE stands for a column on its own. + (if (equal environment "column") options "") + (format "%s\\columnwidth" column-width))) + ;; Block's opening string. + (when (nth 2 env-format) + (concat + (org-fill-template + (nth 2 env-format) + (nconc + ;; If BEAMER_act property has its value enclosed in square + ;; brackets, it is a default overlay specification and + ;; overlay specification is empty. Otherwise, it is an + ;; overlay specification and the default one is nil. + (let ((action (org-element-property :BEAMER_ACT headline))) + (cond + ((not action) (list (cons "a" "") (cons "A" "") (cons "R" ""))) + ((and (string-prefix-p "[" action) + (string-suffix-p "]" action)) + (list + (cons "A" (org-beamer--normalize-argument action 'defaction)) + (cons "a" "") + (cons "R" action))) + (t + (list (cons "a" (org-beamer--normalize-argument action 'action)) + (cons "A" "") + (cons "R" action))))) + (list (cons "o" options) + (cons "O" (or raw-options "")) + (cons "h" title) + (cons "r" raw-title) + (cons "H" (if (equal raw-title "") "" + (format "{%s}" raw-title))) + (cons "U" (if (equal raw-title "") "" + (format "[%s]" raw-title)))))) + "\n")) + contents + ;; Block's closing string, if any. + (and (nth 3 env-format) (concat (nth 3 env-format) "\n")) + (when column-width "\\end{column}\n") + (when end-columns-p "\\end{columns}")))) + +(defun org-beamer-headline (headline contents info) + "Transcode HEADLINE element into Beamer code. +CONTENTS is the contents of the headline. INFO is a plist used +as a communication channel." + (unless (org-element-property :footnote-section-p headline) + (let ((level (org-export-get-relative-level headline info)) + (frame-level (org-beamer--frame-level headline info)) + (environment (let ((env (org-element-property :BEAMER_ENV headline))) + (or (org-string-nw-p env) "block")))) + (cond + ;; Case 1: Resume frame specified by "BEAMER_ref" property. + ((equal environment "againframe") + (let ((ref (org-element-property :BEAMER_REF headline))) + ;; Reference to frame being resumed is mandatory. Ignore + ;; the whole headline if it isn't provided. + (when (org-string-nw-p ref) + (concat "\\againframe" + ;; Overlay specification. + (let ((overlay (org-element-property :BEAMER_ACT headline))) + (when overlay + (org-beamer--normalize-argument + overlay + (if (string-match "\\`\\[.*\\]\\'" overlay) 'defaction + 'action)))) + ;; Options. + (let ((options (org-element-property :BEAMER_OPT headline))) + (when options + (org-beamer--normalize-argument options 'option))) + ;; Resolve reference provided by "BEAMER_ref" + ;; property. This is done by building a minimal + ;; fake link and calling the appropriate resolve + ;; function, depending on the reference syntax. + (let ((target + (if (string-match "\\`\\(id:\\|#\\)" ref) + (org-export-resolve-id-link + `(link (:path ,(substring ref (match-end 0)))) + info) + (org-export-resolve-fuzzy-link + `(link (:path + ;; Look for headlines only. + ,(if (eq (string-to-char ref) ?*) ref + (concat "*" ref)))) + info)))) + ;; Now use user-defined label provided in TARGET + ;; headline, or fallback to standard one. + (format "{%s}" (org-beamer--get-label target info))))))) + ;; Case 2: Creation of an appendix is requested. + ((equal environment "appendix") + (concat "\\appendix" + (org-element-property :BEAMER_ACT headline) + "\n" + (make-string (org-element-property :pre-blank headline) ?\n) + contents)) + ;; Case 3: Ignore heading. + ((equal environment "ignoreheading") + (concat (make-string (org-element-property :pre-blank headline) ?\n) + contents)) + ;; Case 4: HEADLINE is a note. + ((member environment '("note" "noteNH")) + (concat "\\note" + ;; Overlay specification. + (let ((overlay (org-element-property :BEAMER_ACT headline))) + (when overlay + (org-beamer--normalize-argument + overlay + (if (string-match "\\`\\[.*\\]\\'" overlay) + 'defaction 'action)))) + (format "{%s}" + (concat (and (equal environment "note") + (concat + (org-export-data + (org-element-property :title headline) + info) + "\n")) + (org-trim contents))))) + ;; Case 5: HEADLINE is a frame. + ((= level frame-level) + (org-beamer--format-frame headline contents info)) + ;; Case 6: Regular section, extracted from + ;; `org-latex-classes'. + ((< level frame-level) + (org-beamer--format-section headline contents info)) + ;; Case 7: Otherwise, HEADLINE is a block. + (t (org-beamer--format-block headline contents info)))))) + + +;;;; Item + +(defun org-beamer-item (item contents info) + "Transcode an ITEM element into Beamer code. +CONTENTS holds the contents of the item. INFO is a plist holding +contextual information." + (org-export-with-backend + ;; Delegate item export to `latex'. However, we use `beamer' + ;; transcoders for objects in the description tag. + (org-export-create-backend + :parent 'beamer + :transcoders + (list + (cons + 'item + (lambda (item _c _i) + (let ((action + (let ((first (car (org-element-contents item)))) + (and (eq (org-element-type first) 'paragraph) + (org-beamer--element-has-overlay-p first)))) + (output (org-latex-item item contents info))) + (if (not (and action (string-match "\\\\item" output))) output + ;; If the item starts with a paragraph and that paragraph + ;; starts with an export snippet specifying an overlay, + ;; append it to the \item command. + (replace-match (concat "\\\\item" action) nil nil output))))))) + item contents info)) + + +;;;; Keyword + +(defun org-beamer-keyword (keyword contents info) + "Transcode a KEYWORD element into Beamer code. +CONTENTS is nil. INFO is a plist used as a communication +channel." + (let ((key (org-element-property :key keyword)) + (value (org-element-property :value keyword))) + ;; Handle specifically BEAMER and TOC (headlines only) keywords. + ;; Otherwise, fallback to `latex' back-end. + (cond + ((equal key "BEAMER") value) + ((and (equal key "TOC") (string-match "\\<headlines\\>" value)) + (let ((depth (or (and (string-match "[0-9]+" value) + (string-to-number (match-string 0 value))) + (plist-get info :with-toc))) + (options (and (string-match "\\[.*?\\]" value) + (match-string 0 value)))) + (concat + (when (wholenump depth) (format "\\setcounter{tocdepth}{%s}\n" depth)) + "\\tableofcontents" options))) + (t (org-export-with-backend 'latex keyword contents info))))) + + +;;;; Link + +(defun org-beamer-link (link contents info) + "Transcode a LINK object into Beamer code. +CONTENTS is the description part of the link. INFO is a plist +used as a communication channel." + (or (org-export-custom-protocol-maybe link contents 'beamer info) + ;; Fall-back to LaTeX export. However, prefer "\hyperlink" over + ;; "\hyperref" since the former handles overlay specifications. + (let ((latex-link (org-export-with-backend 'latex link contents info))) + (if (string-match "\\`\\\\hyperref\\[\\(.*?\\)\\]" latex-link) + (replace-match + (format "\\\\hyperlink%s{\\1}" + (or (org-beamer--element-has-overlay-p link) "")) + nil nil latex-link) + latex-link)))) + + +;;;; Plain List +;; +;; Plain lists support `:environment', `:overlay' and `:options' +;; attributes. + +(defun org-beamer-plain-list (plain-list contents info) + "Transcode a PLAIN-LIST element into Beamer code. +CONTENTS is the contents of the list. INFO is a plist holding +contextual information." + (let* ((type (org-element-property :type plain-list)) + (attributes (org-combine-plists + (org-export-read-attribute :attr_latex plain-list) + (org-export-read-attribute :attr_beamer plain-list))) + (latex-type (let ((env (plist-get attributes :environment))) + (cond (env) + ((eq type 'ordered) "enumerate") + ((eq type 'descriptive) "description") + (t "itemize"))))) + (org-latex--wrap-label + plain-list + (format "\\begin{%s}%s%s\n%s\\end{%s}" + latex-type + ;; Default overlay specification, if any. + (org-beamer--normalize-argument + (or (plist-get attributes :overlay) "") + 'defaction) + ;; Second optional argument depends on the list type. + (org-beamer--normalize-argument + (or (plist-get attributes :options) "") + 'option) + ;; Eventually insert contents and close environment. + contents + latex-type) + info))) + + +;;;; Radio Target + +(defun org-beamer-radio-target (radio-target text info) + "Transcode a RADIO-TARGET object into Beamer code. +TEXT is the text of the target. INFO is a plist holding +contextual information." + (format "\\hypertarget%s{%s}{%s}" + (or (org-beamer--element-has-overlay-p radio-target) "") + (org-export-get-reference radio-target info) + text)) + + +;;;; Template +;; +;; Template used is similar to the one used in `latex' back-end, +;; excepted for the table of contents and Beamer themes. + +(defun org-beamer-template (contents info) + "Return complete document string after Beamer conversion. +CONTENTS is the transcoded contents string. INFO is a plist +holding export options." + (let ((title (org-export-data (plist-get info :title) info)) + (subtitle (org-export-data (plist-get info :subtitle) info))) + (concat + ;; Time-stamp. + (and (plist-get info :time-stamp-file) + (format-time-string "%% Created %Y-%m-%d %a %H:%M\n")) + ;; LaTeX compiler + (org-latex--insert-compiler info) + ;; Document class and packages. + (org-latex-make-preamble info) + ;; Insert themes. + (let ((format-theme + (lambda (prop command) + (let ((theme (plist-get info prop))) + (when theme + (concat command + (if (not (string-match "\\[.*\\]" theme)) + (format "{%s}\n" theme) + (format "%s{%s}\n" + (match-string 0 theme) + (org-trim + (replace-match "" nil nil theme)))))))))) + (mapconcat (lambda (args) (apply format-theme args)) + '((:beamer-theme "\\usetheme") + (:beamer-color-theme "\\usecolortheme") + (:beamer-font-theme "\\usefonttheme") + (:beamer-inner-theme "\\useinnertheme") + (:beamer-outer-theme "\\useoutertheme")) + "")) + ;; Possibly limit depth for headline numbering. + (let ((sec-num (plist-get info :section-numbers))) + (when (integerp sec-num) + (format "\\setcounter{secnumdepth}{%d}\n" sec-num))) + ;; Author. + (let ((author (and (plist-get info :with-author) + (let ((auth (plist-get info :author))) + (and auth (org-export-data auth info))))) + (email (and (plist-get info :with-email) + (org-export-data (plist-get info :email) info)))) + (cond ((and author email (not (string= "" email))) + (format "\\author{%s\\thanks{%s}}\n" author email)) + ((or author email) (format "\\author{%s}\n" (or author email))))) + ;; Date. + (let ((date (and (plist-get info :with-date) (org-export-get-date info)))) + (format "\\date{%s}\n" (org-export-data date info))) + ;; Title + (format "\\title{%s}\n" title) + (when (org-string-nw-p subtitle) + (concat (format (plist-get info :beamer-subtitle-format) subtitle) "\n")) + ;; Beamer-header + (let ((beamer-header (plist-get info :beamer-header))) + (when beamer-header + (format "%s\n" (plist-get info :beamer-header)))) + ;; 9. Hyperref options. + (let ((template (plist-get info :latex-hyperref-template))) + (and (stringp template) + (format-spec template (org-latex--format-spec info)))) + ;; Document start. + "\\begin{document}\n\n" + ;; Title command. + (org-element-normalize-string + (cond ((not (plist-get info :with-title)) nil) + ((string= "" title) nil) + ((not (stringp org-latex-title-command)) nil) + ((string-match "\\(?:[^%]\\|^\\)%s" + org-latex-title-command) + (format org-latex-title-command title)) + (t org-latex-title-command))) + ;; Table of contents. + (let ((depth (plist-get info :with-toc))) + (when depth + (concat + (format "\\begin{frame}%s{%s}\n" + (org-beamer--normalize-argument + (plist-get info :beamer-outline-frame-options) 'option) + (plist-get info :beamer-outline-frame-title)) + (when (wholenump depth) + (format "\\setcounter{tocdepth}{%d}\n" depth)) + "\\tableofcontents\n" + "\\end{frame}\n\n"))) + ;; Document's body. + contents + ;; Creator. + (if (plist-get info :with-creator) + (concat (plist-get info :creator) "\n") + "") + ;; Document end. + "\\end{document}"))) + + + +;;; Minor Mode + + +(defvar org-beamer-mode-map + (let ((map (make-sparse-keymap))) + (define-key map "\C-c\C-b" 'org-beamer-select-environment) + map) + "The keymap for `org-beamer-mode'.") + +;;;###autoload +(define-minor-mode org-beamer-mode + "Support for editing Beamer oriented Org mode files." + :lighter " Bm") + +(when (fboundp 'font-lock-add-keywords) + (font-lock-add-keywords + 'org-mode + '((":\\(B_[a-z]+\\|BMCOL\\):" 1 'org-beamer-tag prepend)) + 'prepend)) + +(defface org-beamer-tag '((t (:box (:line-width 1 :color grey40)))) + "The special face for beamer tags." + :group 'org-export-beamer) + +(defun org-beamer-property-changed (property value) + "Track the BEAMER_env property with tags. +PROPERTY is the name of the modified property. VALUE is its new +value." + (cond + ((equal property "BEAMER_env") + (save-excursion + (org-back-to-heading t) + ;; Filter out Beamer-related tags and install environment tag. + (let ((tags (cl-remove-if (lambda (x) (string-match "^B_" x)) + (org-get-tags nil t))) + (env-tag (and (org-string-nw-p value) (concat "B_" value)))) + (org-set-tags (if env-tag (cons env-tag tags) tags)) + (when env-tag (org-toggle-tag env-tag 'on))))) + ((equal property "BEAMER_col") + (org-toggle-tag "BMCOL" (if (org-string-nw-p value) 'on 'off))))) + +(add-hook 'org-property-changed-functions 'org-beamer-property-changed) + +(defun org-beamer-allowed-property-values (property) + "Supply allowed values for PROPERTY." + (cond + ((and (equal property "BEAMER_env") + (not (org-entry-get nil (concat property "_ALL") 'inherit))) + ;; If no allowed values for BEAMER_env have been defined, + ;; supply all defined environments + (mapcar 'car (append org-beamer-environments-special + org-beamer-environments-extra + org-beamer-environments-default))) + ((and (equal property "BEAMER_col") + (not (org-entry-get nil (concat property "_ALL") 'inherit))) + ;; If no allowed values for BEAMER_col have been defined, supply + ;; some. + (split-string org-beamer-column-widths " ")))) + +(add-hook 'org-property-allowed-value-functions + 'org-beamer-allowed-property-values) + + + +;;; Commands + +;;;###autoload +(defun org-beamer-export-as-latex + (&optional async subtreep visible-only body-only ext-plist) + "Export current buffer as a Beamer buffer. + +If narrowing is active in the current buffer, only export its +narrowed part. + +If a region is active, export that region. + +A non-nil optional argument ASYNC means the process should happen +asynchronously. The resulting buffer should be accessible +through the `org-export-stack' interface. + +When optional argument SUBTREEP is non-nil, export the sub-tree +at point, extracting information from the headline properties +first. + +When optional argument VISIBLE-ONLY is non-nil, don't export +contents of hidden elements. + +When optional argument BODY-ONLY is non-nil, only write code +between \"\\begin{document}\" and \"\\end{document}\". + +EXT-PLIST, when provided, is a property list with external +parameters overriding Org default settings, but still inferior to +file-local settings. + +Export is done in a buffer named \"*Org BEAMER Export*\", which +will be displayed when `org-export-show-temporary-export-buffer' +is non-nil." + (interactive) + (org-export-to-buffer 'beamer "*Org BEAMER Export*" + async subtreep visible-only body-only ext-plist (lambda () (LaTeX-mode)))) + +;;;###autoload +(defun org-beamer-export-to-latex + (&optional async subtreep visible-only body-only ext-plist) + "Export current buffer as a Beamer presentation (tex). + +If narrowing is active in the current buffer, only export its +narrowed part. + +If a region is active, export that region. + +A non-nil optional argument ASYNC means the process should happen +asynchronously. The resulting file should be accessible through +the `org-export-stack' interface. + +When optional argument SUBTREEP is non-nil, export the sub-tree +at point, extracting information from the headline properties +first. + +When optional argument VISIBLE-ONLY is non-nil, don't export +contents of hidden elements. + +When optional argument BODY-ONLY is non-nil, only write code +between \"\\begin{document}\" and \"\\end{document}\". + +EXT-PLIST, when provided, is a property list with external +parameters overriding Org default settings, but still inferior to +file-local settings. + +Return output file's name." + (interactive) + (let ((file (org-export-output-file-name ".tex" subtreep))) + (org-export-to-file 'beamer file + async subtreep visible-only body-only ext-plist))) + +;;;###autoload +(defun org-beamer-export-to-pdf + (&optional async subtreep visible-only body-only ext-plist) + "Export current buffer as a Beamer presentation (PDF). + +If narrowing is active in the current buffer, only export its +narrowed part. + +If a region is active, export that region. + +A non-nil optional argument ASYNC means the process should happen +asynchronously. The resulting file should be accessible through +the `org-export-stack' interface. + +When optional argument SUBTREEP is non-nil, export the sub-tree +at point, extracting information from the headline properties +first. + +When optional argument VISIBLE-ONLY is non-nil, don't export +contents of hidden elements. + +When optional argument BODY-ONLY is non-nil, only write code +between \"\\begin{document}\" and \"\\end{document}\". + +EXT-PLIST, when provided, is a property list with external +parameters overriding Org default settings, but still inferior to +file-local settings. + +Return PDF file's name." + (interactive) + (let ((file (org-export-output-file-name ".tex" subtreep))) + (org-export-to-file 'beamer file + async subtreep visible-only body-only ext-plist + #'org-latex-compile))) + +;;;###autoload +(defun org-beamer-select-environment () + "Select the environment to be used by beamer for this entry. +While this uses (for convenience) a tag selection interface, the +result of this command will be that the BEAMER_env *property* of +the entry is set. + +In addition to this, the command will also set a tag as a visual +aid, but the tag does not have any semantic meaning." + (interactive) + ;; Make sure `org-beamer-environments-special' has a higher + ;; priority than `org-beamer-environments-extra'. + (let* ((envs (append org-beamer-environments-special + org-beamer-environments-extra + org-beamer-environments-default)) + (org-current-tag-alist + (append '((:startgroup)) + (mapcar (lambda (e) (cons (concat "B_" (car e)) + (string-to-char (nth 1 e)))) + envs) + '((:endgroup)) + '(("BMCOL" . ?|)))) + (org-tag-persistent-alist nil) + (org-use-fast-tag-selection t) + (org-fast-tag-selection-single-key t)) + (org-set-tags-command) + (let ((tags (org-get-tags nil t))) + (cond + ;; For a column, automatically ask for its width. + ((eq org-last-tag-selection-key ?|) + (if (member "BMCOL" tags) + (org-set-property "BEAMER_col" (read-string "Column width: ")) + (org-delete-property "BEAMER_col"))) + ;; For an "againframe" section, automatically ask for reference + ;; to resumed frame and overlay specifications. + ((eq org-last-tag-selection-key ?A) + (if (equal (org-entry-get nil "BEAMER_env") "againframe") + (progn (org-entry-delete nil "BEAMER_env") + (org-entry-delete nil "BEAMER_ref") + (org-entry-delete nil "BEAMER_act")) + (org-entry-put nil "BEAMER_env" "againframe") + (org-set-property + "BEAMER_ref" + (read-string "Frame reference (*Title, #custom-id, id:...): ")) + (org-set-property "BEAMER_act" + (read-string "Overlay specification: ")))) + ((let* ((tags-re (concat "B_" (regexp-opt (mapcar #'car envs) t))) + (env (cl-some (lambda (tag) + (and (string-match tags-re tag) + (match-string 1 tag))) + tags))) + (and env (progn (org-entry-put nil "BEAMER_env" env) t)))) + (t (org-entry-delete nil "BEAMER_env")))))) + +;;;###autoload +(defun org-beamer-publish-to-latex (plist filename pub-dir) + "Publish an Org file to a Beamer presentation (LaTeX). + +FILENAME is the filename of the Org file to be published. PLIST +is the property list for the given project. PUB-DIR is the +publishing directory. + +Return output file name." + (org-publish-org-to 'beamer filename ".tex" plist pub-dir)) + +;;;###autoload +(defun org-beamer-publish-to-pdf (plist filename pub-dir) + "Publish an Org file to a Beamer presentation (PDF, via LaTeX). + +FILENAME is the filename of the Org file to be published. PLIST +is the property list for the given project. PUB-DIR is the +publishing directory. + +Return output file name." + ;; Unlike to `org-beamer-publish-to-latex', PDF file is generated in + ;; working directory and then moved to publishing directory. + (org-publish-attachment + plist + ;; Default directory could be anywhere when this function is + ;; called. We ensure it is set to source file directory during + ;; compilation so as to not break links to external documents. + (let ((default-directory (file-name-directory filename))) + (org-latex-compile + (org-publish-org-to + 'beamer filename ".tex" plist (file-name-directory filename)))) + pub-dir)) + + +(provide 'ox-beamer) + +;; Local variables: +;; generated-autoload-file: "org-loaddefs.el" +;; End: + +;;; ox-beamer.el ends here |