*ft_context.txt*	For Vim version 9.0.  Last change: 2022 Aug 12

This is the documentation for the ConTeXt filetype plugin.

NOTE: the plugin requires +vim9script.

==============================================================================
CONTENTS						*context.vim* *ft-context*

1. Introduction				|ft-context-intro|
2. Commands				|ft-context-commands|
3. Settings				|ft-context-settings|
4. Mappings				|ft-context-mappings|

==============================================================================
							*ft-context-intro*
Introduction ~

ConTeXt, similarly to LaTeX, is a macro-based typesetting system built on TeX:
>
	https://wiki.contextgarden.net
	https://wiki.contextgarden.net/Vim
<
The ConTeXt plugin provides syntax highlighting, completion and support for
typesetting ConTeXt documents. The recommended way to typeset a document is to
use |:ConTeXt|. This will invoke the `mtxrun` script that is found in $PATH.

For more fine grained control over the command and its environment, you may
invoke `context.Typeset()` directly (or `context#Typeset()` from legacy Vim
script). For instance, if you have installed a version of ConTeXt in
`~/context`, you may define a function to use it (you may put the following
code in `~/.vim/after/ftplugin/context.vim`) similar to the following:
>
	import autoload 'context.vim'

	def MyConTeXt()
	    const env = {'PATH':
	      printf("%s/context/tex/texmf-<os>-<arch>/bin:%s", $HOME, $PATH)}
	    context.Typeset("%", env)
	enddef
<
and perhaps use it with a mapping:
>
	nnoremap <silent><buffer><leader>t <scriptcmd>MyConTeXt()<cr>
<
`context.Typeset()` accepts a third optional argument to specify a custom
typesetting command. Such argument must be a function that takes a path and
returns the command as a List. For example:
>
	def ConTeXtCustomCommand(path: string): list<string>
	  return ['mtxrun', '--script', 'context', '--nonstopmode, path]
	enddef

	context.ConTeXtTypeset("%", v:none, ConTeXtCustomCommand)
<
Large projects are often organized as a root document and various chapter
files. When editing a chapter file, it is convenient to invoke |:ConTeXt|
directly on it, rather than having to switch to the root file. A "magic line"
can be added at the beginning of each chapter file, which specifies the
relative path to the root file. For instance:
>
	% !TEX root = ../MyRoot.tex
<
Vim searches for the magic line in the first ten lines of the current buffer:
if it is found, the document specified by that line is typeset rather than the
one in the current buffer. The root document does not have to be opened in
Vim.

To extend completion and syntax highlighting, you may generate supporting
files using ConTeXt and add them to your configuration. If you configuration
resides in `~/.vim`, you may use these commands:
>
	mkdir -p ~/.vim/syntax/shared
	cd ~/.vim/syntax/shared
	mtxrun --script interface --vim
<
The last command will create the following syntax files:

- `context-data-context.vim`;
- `context-data-interfaces.vim`;
- `context-data-metafun.vim`;
- `context-data-tex.vim`. 

The same command can be used to update those syntax files.

							*ft-context-commands*
Commands ~
					*:ConTeXt*
Start a background |job| to typeset the document in the current buffer. The
command accepts an optional buffer's name, if you want to typeset a document
that is in a different buffer.

					*:ConTeXtLog*
Edit the log file corresponding to the source in the current buffer.

					*:ConTeXtJobsStatus*
Echo the number of jobs currently running in the background.

					*:ConTeXtStopJobs*
Stop all the ConTeXt jobs currently running in the background.

							*ft-context-settings*
Settings ~
					*'b:context_ignore_makefile'*
					*'g:context_ignore_makefile'*
`make` can be used to (synchronously) typeset a document. If a Makefile exists
and this option is not set, standard `make` is used. If this option is set,
`mtxrun` is invoked instead, even if a Makefile exists.
>
	g:context_ignore_makefile = 0
<
NOTE: before using `make`, set the working directory of the buffer to the
directory of the file to be typeset.
					*'b:context_include'*
					*'g:context_include'*
Dictionary of filetype/GROUP pairs for which syntax highlighting should be
activated between \startGROUP and \stopGROUP. The default is to highlight XML
between `\startXML` and `\stopXML`.
>
	g:context_include = {'xml': 'XML'}

NOTE: Lua and MetaPost are always highlighted within the respective blocks.

					*'g:no_context_maps'*
When set, do not define any mappings.
>
	g:no_context_maps = 0
<
							*ft-context-mappings*
Mappings ~

tp			"reflow TeX paragraph".

i$			"inside inline math block".

a$			"around inline math block".

]]			[count] start of sections forward.

[[			[count] start of sections backward.

][			[count] end sections forward.

[]			[count] end of sections backward.

]}			[count] end of blocks (\stop..., \setup...,
			\define...) forward.

[{			[count] begin of blocks (\start..., \setup...,
			\define...) backward.

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