CODEWITHSUNDEEP
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Reputation: 15710

How to syntax highlight fragments of code in one language embedded in the source code in another language in Vim?

I have a custom XML file format which can contain blocks of code within certain tags.

For example:

<Root>
    <Sql> select * from foo </Sql>
    <MoreJunk> ... </MoreJunk>
    <Python><![CDATA[
    def Bar(*args):
        return False
    ]]></Python>
</Root>

How can I get Vim to use SQL syntax highlighting for the text inside <Sql> tags and use Python higlighting for text inside <Python> tags?

I know Vim can already do this because it correctly highlights Javascript inside HTML files.

I tried inspecting the HTML syntax file but couldn’t figure it out.

Upvotes: 20

Views: 4815

Answers (2)

Simon B. Jensen
Simon B. Jensen

Reputation: 978

This document describes how to write your own syntax highlighting. You should probably be able to figure out how the HTML-syntax highlighting works with javascript, with that as a reference.

Upvotes: 2

f3lix
f3lix

Reputation: 29877

For your XML with python example you would have to do something like this:

runtime! syntax/xml.vim
unlet b:current_syntax
syntax include @Python syntax/python.vim
syntax region pythonCode  start=+<Python>+ keepend end=+/</Python>+  contains=@Python

These lines will include the XML syntax and the python syntax, and the specify a python region where VIM will use the python syntax instead of the XML syntax...

Of course, all this is well documented in VIM. See :he :syn-include on how to include syntax files.

Upvotes: 29

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