Reorganize the easy LaTeX preamble editing in Org section
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README.org
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README.org
@ -3126,126 +3126,6 @@ The following posts provide programming information:
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(add-to-list 'safe-local-eval-forms '(org-eval-python-setup-blocks)))
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#+end_src
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*** [[info:org#LaTeX header and sectioning][Easy LaTeX preamble editing]]
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:PROPERTIES:
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:CUSTOM_ID: sec:easy-latex-preamble-editing
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:END:
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There are at least two ways (new and old) to edit the LateX preamble
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=latex_header= and =latex-extra_header= export options easily in LaTeX source or
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export blocks. This [[info:org#Top][Org (info)]] file uses the new way, but keeps the old way for
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backwards compatibility.
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The new way -- exploiting an idea of [[https://www.matem.unam.mx/~omar/][Omar Antolin Camarena]] -- is to code new
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[[info:org#Editing Source Code][<LANGUAGE>-modes]] allowing to edit in LaTeX mode and to export to LaTeX code with
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[[info:org#LaTeX specific export settings][correct LaTeX preamble export setting prefixes]]. Here, are links to three posts
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exposing his idea:
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1. [[https://www.reddit.com/r/orgmode/comments/7u2n0h/tip_for_defining_latex_macros_for_use_in_both/][Export LaTeX macros to LaTeX and HTML/MathJax preambles (reddit)]],
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2. [[https://www.reddit.com/r/orgmode/comments/5bi6ku/tip_for_exporting_javascript_source_block_to/][Export JavaScript source blocks to script tags in HTML (reddit)]],
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3. [[https://emacs.stackexchange.com/questions/28301/export-javascript-source-block-to-script-tag-in-html-when-exporting-org-file-to][Export JavaScript source blocks to script tags in HTML (SX)]].
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Listing [[lst:org-babel-latex-header-blocks]] implements this way by means of two
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new [[info:org#Editing Source Code][<LANGUAGE>-modes]]: =latex-header= and =latex-extra-header=.
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#+caption[New =<LANGUAGE>-modes= to edit the LaTeX preamble easily]:
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#+caption: Add =latex-header= and =latex-extra-header= language modes to edit
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#+caption: LaTeX preamble =latex_header= and =latex_extra_header= export options
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#+caption: easily.
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#+name: lst:org-babel-latex-header-blocks
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#+begin_src emacs-lisp -n :exports code :results silent
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(with-eval-after-load 'emacs
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(defun prefix-all-lines (prefix body)
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(with-temp-buffer
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(insert body)
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(string-insert-rectangle (point-min) (point-max) prefix)
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(buffer-string)))
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(defun org-babel-execute:latex-extra-header (body _params)
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"Execute a block of LaTeX extra header lines with org-babel.
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This function is called by `org-babel-execute-src-block' and
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prefixes all lines with \"#+latex_extra_header: \"."
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(prefix-all-lines "#+latex_extra_header: " body))
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(defun org-babel-execute:latex-header (body _params)
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"Execute a block of LaTeX header lines with org-babel.
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This function is called by `org-babel-execute-src-block' and
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prefixes all lines with \"#+latex_header: \"."
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(prefix-all-lines "#+latex_header: " body))
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(defvar org-babel-default-header-args:latex-extra-header
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'((:exports . "results") (:results . "raw")))
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(defvar org-babel-default-header-args:latex-header
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'((:exports . "results") (:results . "raw")))
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(with-eval-after-load 'org-src
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(setopt org-src-window-setup 'current-window)
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(add-to-list 'org-src-lang-modes '("toml" . conf-toml))
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(add-to-list 'org-src-lang-modes '("latex-header" . latex))
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(add-to-list 'org-src-lang-modes '("latex-extra-header" . latex))))
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#+end_src
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The old way is to use a special export attribute as in the function
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=org-latex-header-blocks-filter= in [[https://git.sr.ht/~bzg/org-contrib/tree/master/item/lisp/ox-extra.el][ox-extra.el]]. Apparently, nobody is using
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this broken function (broken, since it relies on support only in org-mode before
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=2014-11-11=). Listing [[lst:org-latex-header-blocks-filter]] proposes a fix for
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=org-latex-header-blocks-filter=.
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#+caption[Convert marked LaTeX export blocks to LaTeX header lines]:
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#+caption: Convert marked LaTeX export blocks to LaTeX header lines.
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#+name: lst:org-latex-header-blocks-filter
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#+begin_src emacs-lisp -n :results silent
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(with-eval-after-load 'ox
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(defun org-latex-header-blocks-filter (backend)
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"Convert marked LaTeX export blocks to \"#+latex_header: \" lines.
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The marker is a line \"#+header: :header yes\" preceding the block.
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For instance, the LaTeX export block
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,#+header: :header yes
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,#+begin_export latex
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% This line converts to a LaTeX header line.
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,#+end_export
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converts to
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\"#+latex_header: % This line converts to a LaTeX header line.\"."
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(when (org-export-derived-backend-p backend 'latex)
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(let ((blocks
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(org-element-map
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(org-element-parse-buffer 'greater-element nil) 'export-block
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(lambda (block)
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(let ((type (org-element-property :type block))
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(header (org-export-read-attribute :header block :header)))
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(when (and (string= type "LATEX") (string= header "yes"))
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block))))))
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(mapc (lambda (block)
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;; Set point to where to insert LaTeX header lines
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;; after deleting the block.
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(goto-char (org-element-property :post-affiliated block))
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(let ((lines
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(split-string (org-element-property :value block) "\n")))
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(delete-region (org-element-property :begin block)
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(org-element-property :end block))
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(dolist (line lines)
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(insert (concat "#+latex_header: "
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(replace-regexp-in-string "\\` *" "" line)
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"\n")))))
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;; Reverse to go upwards to avoid wrecking the list of
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;; block positions in the file that would occur in case
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;; of going downwards.
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(reverse blocks)))))
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;; Push the filter on the hook.
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(cl-pushnew #'org-latex-header-blocks-filter
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org-export-before-parsing-hook))
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#+end_src
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This file uses the new way, while keeping the old way for backwards
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compatibility, because the new way feels less hackish than the old way. A
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practical difference is that new way source blocks (contrary to old way export
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blocks) do not work in [[info:org#Export Settings][#+SETUPFILE: <FILE>]], but only in [[info:org#Export Settings][#+INCLUDE: <FILE>]] files.
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*** [[info:org#Macro Replacement][Org-mode macro utilities]]
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:PROPERTIES:
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:CUSTOM_ID: sec:org-macro-utilities
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@ -3493,6 +3373,125 @@ inclusion (info)]] and [[info:org#Noweb Reference Syntax][noweb (info)]] tricker
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<<latex-header-5>>
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#+end_src
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*** [[info:org#LaTeX header and sectioning][Deprecated easy LaTeX preamble editing methods]]
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:PROPERTIES:
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:CUSTOM_ID: sec:easy-latex-preamble-editing
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:END:
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There are at least two deprecated (old and historic) ways to edit the LateX
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preamble =latex_header= and =latex_extra_header= export options easily in LaTeX
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source or export blocks. This [[info:org#Top][Org (info)]] file uses the recommended method of
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noweb trickery in Section [[#sec:file-inclusion-and-noweb]].
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The old way -- exploiting an idea of [[https://www.matem.unam.mx/~omar/][Omar Antolin Camarena]] -- is to code new
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[[info:org#Editing Source Code][<LANGUAGE>-modes]] allowing to edit in LaTeX mode and to export to LaTeX code with
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[[info:org#LaTeX specific export settings][correct LaTeX preamble export setting prefixes]]. Here, are links to three posts
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exposing his idea:
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1. [[https://www.reddit.com/r/orgmode/comments/7u2n0h/tip_for_defining_latex_macros_for_use_in_both/][Export LaTeX macros to LaTeX and HTML/MathJax preambles (reddit)]],
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2. [[https://www.reddit.com/r/orgmode/comments/5bi6ku/tip_for_exporting_javascript_source_block_to/][Export JavaScript source blocks to script tags in HTML (reddit)]],
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3. [[https://emacs.stackexchange.com/questions/28301/export-javascript-source-block-to-script-tag-in-html-when-exporting-org-file-to][Export JavaScript source blocks to script tags in HTML (SX)]].
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Listing [[lst:org-babel-latex-header-blocks]] implements this way by means of two
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new [[info:org#Editing Source Code][<LANGUAGE>-modes]]: =latex-header= and =latex-extra-header=.
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#+caption[New =<LANGUAGE>-modes= to edit the LaTeX preamble easily]:
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#+caption: Add =latex-header= and =latex-extra-header= language modes to edit
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#+caption: LaTeX preamble =latex_header= and =latex_extra_header= export options
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#+caption: easily.
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#+name: lst:org-babel-latex-header-blocks
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#+begin_src emacs-lisp -n :exports code :results silent
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(with-eval-after-load 'emacs
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(defun prefix-all-lines (prefix body)
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(with-temp-buffer
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(insert body)
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(string-insert-rectangle (point-min) (point-max) prefix)
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(buffer-string)))
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(defun org-babel-execute:latex-extra-header (body _params)
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"Execute a block of LaTeX extra header lines with org-babel.
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This function is called by `org-babel-execute-src-block' and
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prefixes all lines with \"#+latex_extra_header: \"."
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(prefix-all-lines "#+latex_extra_header: " body))
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(defun org-babel-execute:latex-header (body _params)
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"Execute a block of LaTeX header lines with org-babel.
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This function is called by `org-babel-execute-src-block' and
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prefixes all lines with \"#+latex_header: \"."
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(prefix-all-lines "#+latex_header: " body))
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(defvar org-babel-default-header-args:latex-extra-header
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'((:exports . "results") (:results . "raw")))
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(defvar org-babel-default-header-args:latex-header
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'((:exports . "results") (:results . "raw")))
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(with-eval-after-load 'org-src
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(setopt org-src-window-setup 'current-window)
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(add-to-list 'org-src-lang-modes '("latex-header" . latex))
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(add-to-list 'org-src-lang-modes '("latex-extra-header" . latex))))
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#+end_src
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The historic way is to use a special export attribute as in the function
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=org-latex-header-blocks-filter= in [[https://git.sr.ht/~bzg/org-contrib/tree/master/item/lisp/ox-extra.el][ox-extra.el]]. Apparently, nobody is using
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this broken function (broken, since it relies on support only in org-mode before
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=2014-11-11=). Listing [[lst:org-latex-header-blocks-filter]] proposes a fix for
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=org-latex-header-blocks-filter=.
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#+caption[Convert marked LaTeX export blocks to LaTeX header lines]:
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#+caption: Convert marked LaTeX export blocks to LaTeX header lines.
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#+name: lst:org-latex-header-blocks-filter
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#+begin_src emacs-lisp -n :results silent
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(with-eval-after-load 'ox
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(defun org-latex-header-blocks-filter (backend)
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"Convert marked LaTeX export blocks to \"#+latex_header: \" lines.
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The marker is a line \"#+header: :header yes\" preceding the block.
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For instance, the LaTeX export block
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,#+header: :header yes
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,#+begin_export latex
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% This line converts to a LaTeX header line.
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,#+end_export
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converts to
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\"#+latex_header: % This line converts to a LaTeX header line.\"."
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(when (org-export-derived-backend-p backend 'latex)
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(let ((blocks
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(org-element-map
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(org-element-parse-buffer 'greater-element nil) 'export-block
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(lambda (block)
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(let ((type (org-element-property :type block))
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(header (org-export-read-attribute :header block :header)))
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(when (and (string= type "LATEX") (string= header "yes"))
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block))))))
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(mapc (lambda (block)
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;; Set point to where to insert LaTeX header lines
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;; after deleting the block.
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(goto-char (org-element-property :post-affiliated block))
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(let ((lines
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(split-string (org-element-property :value block) "\n")))
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(delete-region (org-element-property :begin block)
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(org-element-property :end block))
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(dolist (line lines)
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(insert (concat "#+latex_header: "
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(replace-regexp-in-string "\\` *" "" line)
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"\n")))))
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;; Reverse to go upwards to avoid wrecking the list of
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;; block positions in the file that would occur in case
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;; of going downwards.
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(reverse blocks)))))
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;; Push the filter on the hook.
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(cl-pushnew #'org-latex-header-blocks-filter
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org-export-before-parsing-hook))
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#+end_src
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This file uses the new most simple way, while keeping the deprecated ways for
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backwards compatibility. A practical difference is that new way source blocks
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(contrary to old way export blocks) do not work in [[info:org#Export Settings][#+SETUPFILE: <FILE>]], but only
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in [[info:org#Export Settings][#+INCLUDE: <FILE>]] files.
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*** [[info:org#LaTeX specific export settings][Advanced LaTeX export settings]]
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:PROPERTIES:
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:CUSTOM_ID: sec:advanced-latex-export-settings
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