Org mode setup file to make (La)TeX definitions work in HTML and LaTeX export
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Org mode setup file to make (La)TeX definitions work

This is an Org mode Literate Program, which is tangled (by pressing C-c C-v t, in the default keymap with the .org file loaded) to an Org mode setup file named define.setup. The program uses Org mode's builtin macros, which (apparently) have an undocumented feature of executing any Emacs Lisp code they contain (tested in Emacs 24.5.1, Org mode 8.2.10), to define a generic macro when-fmt for including code in only specified export formats (and any formats derived from them). It then uses this to define a preamble macro for inserting preamble code in HTML and LaTeX formats, and finally several macros for each definition command supported by both MathJax and (La)TeX.


To use the setup file, you must copy the define.setup file (or a regenerated version of it, if you modify the SRC blocks in the .org program file) somewhere Emacs can access, then put the following near the beginning of your own .org file:

#+SETUPFILE: path/to/define.setup

After that, you can use the def or newcommand (and friends) macros, which are all named after the standard (La)TeX commands. You do not need to update a dynamic block, duplicate the definitions, or any other craziness, and the definitions will work almost anywhere in a file. (It will not work if you try to define it after its first use, however.)

All of the commands which can take optional parameters (that is, the LaTeX newcommand and friends) have the optional parameters at the end of the command (instead of between the first and second mandatory parameters, as in LaTeX). I did this because it's much easier to make an Org mode macro parameter optional at the end than elsewhere.

There are some simple usage examples at the end of the program itself, and the examples/ directory currently contains one extended example:

  • An explanation of how rotation matrices can be derived by purely algebraic methods.


If you have some good examples — either simple or extended, but in any case relatively short (use the existing examples as a guide for what I mean) — you'd like to add, pull requests are welcome! I would particularly like to add some simple demos of the macros which do not yet have any. (They are marked with the TODO tag in the Org mode source. If you write one, I would prefer you simply remove the TODO tag rather than marking it DONE.)


This program is licensed under the GNU GPLv3+.