Re: Custom syntax highlighting

[Aditya Mahajan <adityam@umich.edu>]

On Tue, 1 Mar 2016, Nicola wrote:

> On 2016-03-01 15:35:07 +0000, Aditya Mahajan said:
>
>> On Tue, 1 Mar 2016, Nicola wrote:
>> 
>>> I'm using the latest beta, and I need syntax coloring for SQL
>>> (PostgreSQL variant). According to the wiki, there is no SQL
>>> syntax coloring available for MKIV yet, but I'd be happy to
>>> be wrong :)
>> 
>> You can use the vim module:
>> 
>> https://github.com/adityam/filter/blob/master/vim-README.md
>
> That's a pretty impressive module, thanks! I didn't know about it.
>
> I have a couple of questions:
>
> 1) Vim's SQL highlighting is a bit peculiar, in that a user is allowed to 
> set
> a SQL dialect (:h sql-dialects) with SQLSetType or by setting
> g:sql_type_default or b:sql_type_override. For example, the effect of 
> putting
>
>    let g:sql_type_default='pgsql'
>
> in my vimrc is that, when a sql buffer is created, Vim searches for
> syntax/pgsql.vim instead of the default syntax file (sqloracle.vim, I 
> think).
> Note that the filetype remains 'sql'. I have tried to set a SQL dialect 
> inside
> a \startvimrc/\stopvimrc block, but without success (if that matters, I 
> have
> this plugin in my ~/.vim folder: https://github.com/lifepillar/pgsql.vim).
> I have also tried \definevimtyping[SQL][syntax=pgsql], but then I don't get
> any highlighting, which makes me think that the module does not search my
> ~/.vim folder. Does the module work only with syntaxes in core Vim?

I do not load the default vimrc, because that drastically slows down the 
module. Instead, there is an option to create a specific vimrc using:

\startvimrc[name=pgsql]
let g:sql_type_default='pgsql'
\stopvimrc

and then

\definevimtyping[SQL][..., vimrc=pgsql, ...]

By default, the script searches everything in `runtimepath`. If your local 
vim folder is not in runtimepath, you can set the runtimepath in the vimrc 
above.

> 2) Are pscolor and blackandwhite the only possibilities to customize the
> colors? This is important, I need the syntax highlighting to match my
> document's colors.

It is relatively easy to tune the color scheme. See, for example how 
pscolor is defined: 
https://github.com/adityam/filter/blob/cc9d9017bfdd7fe0d67b4723570e960ec6c52e43/t-vim.tex#L280

You can create similar mappings for your favorite color scheme (It does 
require a bit of knowledge of vim syntax groups).

> Finally, your Readme tells to use \definevimtyping[...][...], but I have 
> found
> that I need to use put all the options together: \defienvimtyping[...].

What I mean is \definevimtyping[SQL][numbering=on], etc.

Aditya
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