mirror/org-mode
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/emacs/org-mode.git synced 2024-11-26 07:33:39 +00:00
Code
ca060f7be7
org-mode/lisp/ox-beamer.el
Bastien Guerry 8ee6c13c7f Fix typo: an headline -> a headline.
2013-02-23 13:47:44 +01:00

1253 lines
47 KiB
EmacsLisp
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; ox-beamer.el --- Beamer Back-End for Org Export Engine
;; Copyright (C) 2007-2013 Free Software Foundation, Inc.
;; Author: Carsten Dominik <carsten.dominik AT gmail DOT com>
;; Nicolas Goaziou <n.goaziou AT gmail DOT com>
;; Keywords: org, wp, tex
;; 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 <http://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.
;;
;; Depending on the desired output format, three commands are provided
;; for export: `org-beamer-export-as-latex' (temporary buffer),
;; `org-beamer-export-to-latex' ("tex" file) and
;; `org-beamer-export-to-pdf' ("pdf" file).
;;
;; This back-end supports every buffer keyword, attribute and options
;; items (see `org-latex-options-alist') already supported by `latex'
;; back-end. As such, it is suggested to add an entry in
;; `org-latex-classes' variable which is appropriate for Beamer
;; export.
;;
;; On top of this, the `beamer' back-end also introduces the following
;; keywords: "BEAMER_THEME", "BEAMER_COLOR_THEME",
;; "BEAMER_FONT_THEME", "BEAMER_INNER_THEME", "BEAMER_OUTER_THEME" and
;; "BEAMER_HEADER". All but the latter accept options in square
;; brackets.
;;
;; Moreover, headlines now fall into three categories: sectioning
;; elements, frames and blocks.
;;
;; - Headlines become frames when their level is equal to
;; `org-beamer-frame-level' (or "H" value in the OPTIONS line).
;; Though, if a headline in the current tree has a "BEAMER_env"
;; (see below) property set to either "frame" or "fullframe", its
;; level overrides the variable. A "fullframe" is a frame with an
;; empty (ignored) title.
;;
;; - All frames' children become block environments. Special block
;; types can be enforced by setting headline's "BEAMER_env" property
;; to an appropriate value (see `org-beamer-environments-default'
;; for supported value and `org-beamer-environments-extra' for
;; adding more).
;;
;; - As a special case, if the "BEAMER_env" property is set to either
;; "appendix", "note", "noteNH" or "againframe", the headline will
;; become, respectively, an appendix, a note (within frame or
;; between frame, depending on its level), a note with its title
;; ignored or an againframe command. In the latter case,
;; a "BEAMER_ref" property is mandatory in order to refer to the
;; frame being resumed, and contents are ignored.
;;
;; Also, a headline with an "ignoreheading" environment will have
;; its contents only inserted in the output. This special value is
;; useful to have data between frames, or to properly close
;; a "column" environment.
;;
;; Along with "BEAMER_env", headlines also support the "BEAMER_act"
;; and "BEAMER_opt" properties. The former is translated as an
;; overlay/action specification (or a default overlay specification
;; when enclosed within square brackets) whereas the latter specifies
;; options for the current frame ("fragile" option is added
;; automatically, though).
;;
;; Moreover, headlines handle the "BEAMER_col" property. Its value
;; should be a decimal number representing the width of the column as
;; a fraction of the total text width. If the headline has no
;; specific environment, its title will be ignored and its contents
;; will fill the column created. Otherwise, the block will fill the
;; whole column and the title will be preserved. Two contiguous
;; headlines with a non-nil "BEAMER_col" value share the same
;; "columns" LaTeX environment. It will end before the next headline
;; without such a property. This environment is generated
;; automatically. Although, it can also be explicitly created, with
;; a special "columns" value for "BEAMER_env" property (if it needs to
;; be set up with some specific options, for example).
;;
;; Every plain list has support for `:environment', `:overlay' and
;; `:options' attributes (through ATTR_BEAMER affiliated keyword).
;; The first one allows to use a different environment, the second
;; sets overlay specifications and the last one inserts optional
;; arguments in current list environment.
;;
;; Eventually, an export snippet with a value enclosed within angular
;; brackets put at the beginning of an element or object whose type is
;; among `bold', `item', `link', `radio-target' and `target' will
;; control its overlay specifications.
;;
;; On the minor mode side, `org-beamer-select-environment' (bound by
;; default to "C-c C-b") and `org-beamer-insert-options-template' are
;; the two entry points.
;;; Code:
(eval-when-compile (require 'cl))
(require 'ox-latex)
;;; 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
: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
: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
%o the options argument of the template
%h the headline text
%H if there is headline text, that text in {} braces
%U if there is headline text, that text in [] brackets
close The closing string of the environment."
:group 'org-export-beamer
: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"))
;;; 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%U" "\\end{theorem}")
("definition" "d" "\\begin{definition}%a%U" "\\end{definition}")
("example" "e" "\\begin{example}%a%U" "\\end{example}")
("exampleblock" "E" "\\begin{exampleblock}%a{%h}" "\\end{exampleblock}")
("proof" "p" "\\begin{proof}%a%U" "\\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)) ""
(case type
(action (if (string-match "\\`<.*>\\'" argument) argument
(format "<%s>" argument)))
(defaction (cond
((string-match "\\`\\[<.*>\\]\\'" argument) argument)
((string-match "\\`<.*>\\'" argument)
(format "[%s]" argument))
((string-match "\\`\\[\\(.*\\)\\]\\'" argument)
(format "[<%s>]" (match-string 1 argument)))
(t (format "[<%s>]" argument))))
(option (if (string-match "\\`\\[.*\\]\\'" argument) argument
(format "[%s]" argument)))
(otherwise argument))))
(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-match "\\`<.*>\\'" value) value)))))
;;; Define Back-End
(org-export-define-derived-backend beamer latex
:export-block "BEAMER"
: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
((: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-extra "BEAMER_HEADER" nil nil newline)
(:headline-levels nil "H" org-beamer-frame-level))
: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)
(target . org-beamer-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, or a fallback value built from headline's number. This
function assumes HEADLINE will be treated as a frame."
(let ((opt (org-element-property :BEAMER_OPT headline)))
(if (and (org-string-nw-p opt)
(string-match "\\(?:^\\|,\\)label=\\(.*?\\)\\(?:$\\|,\\)" opt))
(match-string 1 opt)
(format "sec-%s"
(mapconcat 'number-to-string
(org-export-get-headline-number 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
(mapc (lambda (parent)
(let ((env (org-element-property :BEAMER_ENV parent)))
(when (and env (member (downcase env) '("frame" "fullframe")))
(throw 'exit (org-export-get-relative-level parent info)))))
(nreverse (org-export-get-genealogy headline)))
nil)
;; 2. Look for "frame" environment in HEADLINE.
(let ((env (org-element-property :BEAMER_ENV headline)))
(and env (member (downcase 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 (downcase 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."
;; Use `latex' back-end output, inserting overlay specifications
;; if possible.
(let ((latex-headline (org-export-with-backend 'latex headline contents info))
(mode-specs (org-element-property :BEAMER_ACT headline)))
(if (and mode-specs
(string-match "\\`\\\\\\(.*?\\)\\(?:\\*\\|\\[.*\\]\\)?{"
latex-headline))
(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 options from default value and headline's
;; properties. Also add a label for links.
(append
(org-split-string org-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))
","))
;; Provide an automatic label for the frame
;; unless the user specified one.
(unless (and beamer-opt
(string-match "\\(^\\|,\\)label=" beamer-opt))
(list
(format "label=%s"
(org-beamer--get-label headline info)))))))
;; Change options list into a string.
(org-beamer--normalize-argument
(mapconcat
'identity
(if (or (not fragilep) (member "fragile" options)) options
(cons "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*" "\\& " 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 (downcase env)))))
(env-format (unless (member environment '("column" "columns"))
(assoc environment
(append org-beamer-environments-special
org-beamer-environments-extra
org-beamer-environments-default))))
(title (org-export-data (org-element-property :title headline) info))
(options (let ((options (org-element-property :BEAMER_OPT headline)))
(if (not options) ""
(org-beamer--normalize-argument 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\\textwidth" column-width)))
;; Block's opening string.
(when 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" "")))
((string-match "\\`\\[.*\\]\\'" action)
(list
(cons "A" (org-beamer--normalize-argument action 'defaction))
(cons "a" "")))
(t
(list (cons "a" (org-beamer--normalize-argument action 'action))
(cons "A" "")))))
(list (cons "o" options)
(cons "h" title)
(cons "H" (if (equal title "") "" (format "{%s}" title)))
(cons "U" (if (equal title "") "" (format "[%s]" title))))))
"\n"))
contents
;; Block's closing string.
(when environment (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)))
(if (stringp env) (downcase 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* ((type
(progn
(string-match "^\\(id:\\|#\\|\\*\\)?\\(.*\\)" ref)
(cond
((or (not (match-string 1 ref))
(equal (match-string 1 ref) "*")) 'fuzzy)
((equal (match-string 1 ref) "id:") 'id)
(t 'custom-id))))
(link (list 'link (list :path (match-string 2 ref))))
(target (if (eq type 'fuzzy)
(org-export-resolve-fuzzy-link link info)
(org-export-resolve-id-link link 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"))
(format "\\note{%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."
(let ((action (let ((first-element (car (org-element-contents item))))
(and (eq (org-element-type first-element) 'paragraph)
(org-beamer--element-has-overlay-p first-element))))
(output (org-export-with-backend 'latex item contents info)))
(if (not action) output
;; If the item starts with a paragraph and that paragraph starts
;; with an export snippet specifying an overlay, insert it after
;; \item command.
(replace-regexp-in-string "\\\\item" (concat "\\\\item" action) output))))
;;;; 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
"\\begin{frame}"
(when (wholenump depth) (format "\\setcounter{tocdepth}{%s}\n" depth))
"\\tableofcontents" options "\n"
"\\end{frame}")))
(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."
(let ((type (org-element-property :type link))
(path (org-element-property :path link)))
;; Use \hyperlink command for all internal links.
(cond
((equal type "radio")
(let ((destination (org-export-resolve-radio-link link info)))
(when destination
(format "\\hyperlink%s{%s}{%s}"
(or (org-beamer--element-has-overlay-p link) "")
(org-export-solidify-link-text path)
(org-export-data (org-element-contents destination) info)))))
((and (member type '("custom-id" "fuzzy" "id"))
(let ((destination (if (string= type "fuzzy")
(org-export-resolve-fuzzy-link link info)
(org-export-resolve-id-link link info))))
(case (org-element-type destination)
(headline
(let ((label
(format "sec-%s"
(mapconcat
'number-to-string
(org-export-get-headline-number
destination info)
"-"))))
(if (and (plist-get info :section-numbers) (not contents))
(format "\\ref{%s}" label)
(format "\\hyperlink%s{%s}{%s}"
(or (org-beamer--element-has-overlay-p link) "")
label
contents))))
(target
(let ((path (org-export-solidify-link-text path)))
(if (not contents) (format "\\ref{%s}" path)
(format "\\hyperlink%s{%s}{%s}"
(or (org-beamer--element-has-overlay-p link) "")
path
contents))))))))
;; Otherwise, use `latex' back-end.
(t (org-export-with-backend 'latex link contents info)))))
;;;; 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 (format "%s" 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
(format "%s" (or (plist-get attributes :overlay) ""))
'defaction)
;; Second optional argument depends on the list type.
(org-beamer--normalize-argument
(format "%s" (or (plist-get attributes :options) ""))
'option)
;; Eventually insert contents and close environment.
contents
latex-type))))
;;;; 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-solidify-link-text
(org-element-property :value radio-target))
text))
;;;; Target
(defun org-beamer-target (target contents info)
"Transcode a TARGET object into Beamer code.
CONTENTS is nil. INFO is a plist holding contextual
information."
(format "\\hypertarget{%s}{}"
(org-export-solidify-link-text (org-element-property :value target))))
;;;; 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)))
(concat
;; 1. Time-stamp.
(and (plist-get info :time-stamp-file)
(format-time-string "%% Created %Y-%m-%d %a %H:%M\n"))
;; 2. Document class and packages.
(let ((class (plist-get info :latex-class))
(class-options (plist-get info :latex-class-options)))
(org-element-normalize-string
(let* ((header (nth 1 (assoc class org-latex-classes)))
(document-class-string
(and (stringp header)
(if (not class-options) header
(replace-regexp-in-string
"^[ \t]*\\\\documentclass\\(\\(\\[[^]]*\\]\\)?\\)"
class-options header t nil 1)))))
(if (not document-class-string)
(user-error "Unknown LaTeX class `%s'" class)
(org-latex-guess-babel-language
(org-latex-guess-inputenc
(org-splice-latex-header
document-class-string
org-latex-default-packages-alist
org-latex-packages-alist nil
(concat (plist-get info :latex-header-extra)
(plist-get info :beamer-header-extra))))
info)))))
;; 3. Insert themes.
(let ((format-theme
(function
(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"))
""))
;; 4. 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)))
;; 5. 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))
(author (format "\\author{%s}\n" author))
(t "\\author{}\n")))
;; 6. Date.
(let ((date (and (plist-get info :with-date) (plist-get info :date))))
(format "\\date{%s}\n"
(cond ((not date) "")
;; If `:date' consists in a single timestamp and
;; `:date-format' is provided, apply it.
((and (plist-get info :date-format)
(not (cdr date))
(eq (org-element-type (car date)) 'timestamp))
(org-timestamp-format
(car date) (plist-get info :date-format)))
(t (org-export-data date info)))))
;; 7. Title
(format "\\title{%s}\n" title)
;; 8. Hyperref options.
(when (plist-get info :latex-hyperref-p)
(format "\\hypersetup{\n pdfkeywords={%s},\n pdfsubject={%s},\n pdfcreator={%s}}\n"
(or (plist-get info :keywords) "")
(or (plist-get info :description) "")
(if (not (plist-get info :with-creator)) ""
(plist-get info :creator))))
;; 9. Document start.
"\\begin{document}\n\n"
;; 10. Title command.
(org-element-normalize-string
(cond ((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)))
;; 11. Table of contents.
(let ((depth (plist-get info :with-toc)))
(when depth
(concat
(format "\\begin{frame}%s{%s}\n"
(org-beamer--normalize-argument
org-beamer-outline-frame-options 'option)
org-beamer-outline-frame-title)
(when (wholenump depth)
(format "\\setcounter{tocdepth}{%d}\n" depth))
"\\tableofcontents\n"
"\\end{frame}\n\n")))
;; 12. Document's body.
contents
;; 13. Creator.
(let ((creator-info (plist-get info :with-creator)))
(cond
((not creator-info) "")
((eq creator-info 'comment)
(format "%% %s\n" (plist-get info :creator)))
(t (concat (plist-get info :creator) "\n"))))
;; 14. Document end.
"\\end{document}")))
;;; Minor Mode
(defvar org-beamer-mode-map (make-sparse-keymap)
"The keymap for `org-beamer-mode'.")
(define-key org-beamer-mode-map "\C-c\C-b" 'org-beamer-select-environment)
;;;###autoload
(define-minor-mode org-beamer-mode
"Support for editing Beamer oriented Org mode files."
nil " Bm" 'org-beamer-mode-map)
(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 (org-remove-if (lambda (x) (string-match "^B_" x))
(org-get-tags)))
(env-tag (and (org-string-nw-p value) (concat "B_" value))))
(org-set-tags-to (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
(org-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)
(if async
(org-export-async-start
(lambda (output)
(with-current-buffer (get-buffer-create "*Org BEAMER Export*")
(erase-buffer)
(insert output)
(goto-char (point-min))
(LaTeX-mode)
(org-export-add-to-stack (current-buffer) 'beamer)))
`(org-export-as 'beamer ,subtreep ,visible-only ,body-only
',ext-plist))
(let ((outbuf (org-export-to-buffer
'beamer "*Org BEAMER Export*"
subtreep visible-only body-only ext-plist)))
(with-current-buffer outbuf (LaTeX-mode))
(when org-export-show-temporary-export-buffer
(switch-to-buffer-other-window outbuf)))))
;;;###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 ((outfile (org-export-output-file-name ".tex" subtreep)))
(if async
(org-export-async-start
(lambda (f) (org-export-add-to-stack f 'beamer))
`(expand-file-name
(org-export-to-file
'beamer ,outfile ,subtreep ,visible-only ,body-only
',ext-plist)))
(org-export-to-file
'beamer outfile 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)
(if async
(let ((outfile (org-export-output-file-name ".tex" subtreep)))
(org-export-async-start
(lambda (f) (org-export-add-to-stack f 'beamer))
`(expand-file-name
(org-latex-compile
(org-export-to-file
'beamer ,outfile ,subtreep ,visible-only ,body-only
',ext-plist)))))
(org-latex-compile
(org-beamer-export-to-latex
nil subtreep visible-only body-only ext-plist))))
;;;###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-tag-alist
(append '((:startgroup))
(mapcar (lambda (e) (cons (concat "B_" (car e))
(string-to-char (nth 1 e))))
envs)
'((:endgroup))
'(("BMCOL" . ?|))))
(org-fast-tag-selection-single-key t))
(org-set-tags)
(let ((tags (or (ignore-errors (org-get-tags-string)) "")))
(cond
;; For a column, automatically ask for its width.
((eq org-last-tag-selection-key ?|)
(if (string-match ":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: "))))
((string-match (concat ":B_\\(" (mapconcat 'car envs "\\|") "\\):") tags)
(org-entry-put nil "BEAMER_env" (match-string 1 tags)))
(t (org-entry-delete nil "BEAMER_env"))))))
;;;###autoload
(defun org-beamer-insert-options-template (&optional kind)
"Insert a settings template, to make sure users do this right."
(interactive (progn
(message "Current [s]ubtree or [g]lobal?")
(if (eq (read-char-exclusive) ?g) (list 'global)
(list 'subtree))))
(if (eq kind 'subtree)
(progn
(org-back-to-heading t)
(org-reveal)
(org-entry-put nil "EXPORT_LaTeX_CLASS" "beamer")
(org-entry-put nil "EXPORT_LaTeX_CLASS_OPTIONS" "[presentation]")
(org-entry-put nil "EXPORT_FILE_NAME" "presentation.pdf")
(when org-beamer-column-view-format
(org-entry-put nil "COLUMNS" org-beamer-column-view-format))
(org-entry-put nil "BEAMER_col_ALL" org-beamer-column-widths))
(insert "#+LaTeX_CLASS: beamer\n")
(insert "#+LaTeX_CLASS_OPTIONS: [presentation]\n")
(when org-beamer-theme (insert "#+BEAMER_THEME: " org-beamer-theme "\n"))
(when org-beamer-column-view-format
(insert "#+COLUMNS: " org-beamer-column-view-format "\n"))
(insert "#+PROPERTY: BEAMER_col_ALL " org-beamer-column-widths "\n")))
;;;###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
(org-latex-compile (org-publish-org-to 'beamer filename ".tex" plist))
pub-dir))
(provide 'ox-beamer)
;; Local variables:
;; generated-autoload-file: "org-loaddefs.el"
;; End:
;;; ox-beamer.el ends here
View Git Blame Copy Permalink