Rainbow delimiters for Neovim

This Neovim plugin provides alternating syntax highlighting (“rainbow parentheses”) for Neovim, powered by Tree-sitter. The goal is to have a hackable plugin which allows for different configuration of queries and strategies, both globally and per file type. Users can override and extend the built-in defaults through their own configuration.

This is a fork of nvim-ts-rainbow2, which was implemented as a module for nvim-treessiter. However, since nvim-treesitter has deprecated the module system I had to create this standalone plugin.

Installation and setup

Installation

Install it like any other Neovim plugin. You will need a Tree-sitter parser for each language you want to use rainbow delimiters with.

Setup

No configuration is needed to get started, this plugin has reasonable defaults which you can override. Configuration is done by setting entries in the Vim script dictionary g:rainbow_delimiters. Here is an example configuration:

let g:rainbow_delimiters = {
    \ 'strategy': {
        \ '': rainbow_delimiters#strategy.global,
        \ 'vim': rainbow_delimiters#strategy.local,
    \ },
    \ 'query': {
        \ '': 'rainbow-delimiters',
        \ 'lua': 'rainbow-blocks',
    \ },
    \ 'priority': {
        \ '': 110,
        \ 'lua': 210,
    \ },
    \ 'highlight': [
        \ 'RainbowDelimiterRed',
        \ 'RainbowDelimiterYellow',
        \ 'RainbowDelimiterBlue',
        \ 'RainbowDelimiterOrange',
        \ 'RainbowDelimiterGreen',
        \ 'RainbowDelimiterViolet',
        \ 'RainbowDelimiterCyan',
    \ ],
\ }

The equivalent code in Lua:

-- This module contains a number of default definitions
local rainbow_delimiters = require 'rainbow-delimiters'

---@type rainbow_delimiters.config
vim.g.rainbow_delimiters = {
    strategy = {
        [''] = rainbow_delimiters.strategy['global'],
        vim = rainbow_delimiters.strategy['local'],
    },
    query = {
        [''] = 'rainbow-delimiters',
        lua = 'rainbow-blocks',
    },
    priority = {
        [''] = 110,
        lua = 210,
    },
    highlight = {
        'RainbowDelimiterRed',
        'RainbowDelimiterYellow',
        'RainbowDelimiterBlue',
        'RainbowDelimiterOrange',
        'RainbowDelimiterGreen',
        'RainbowDelimiterViolet',
        'RainbowDelimiterCyan',
    },
}

Please refer to the manual for more details. For those who prefer a setup function there is the module rainbow-delimiters.setup that accepts all the same parameters as g:rainbow-delimiters.

require('rainbow-delimiters.setup').setup {
    strategy = {
        -- ...
    },
    query = {
        -- ...
    },
    highlight = {
        -- ...
    },
}

Help wanted

There are only so many languages which I understand to the point that I can write queries for them. If you want support for a new language please consider contributing code. See the CONTRIBUTING for details.

Status of the plugin

Tree-sitter support in Neovim is still experimental. This plugin and its API should be considered stable insofar as breaking changes will only happen if changes to Neovim necessitates them.

License

Licensed under the Apache-2.0 license. Please see the LICENSE file for details.

Migrating from nvim-ts-rainbow2

Rainbow-Delimiters uses different settings than nvim-ts-rainbow2, but converting the configuration is straight-forward. The biggest change is where the settings are stored.

• Settings are stored in the global variable g:rainbow-delimiters, which has the same keys as the old settings
• The default strategy and query have index '' (empty string) instead of 1
• Default highlight groups have the prefix RainbowDelimiter instead of TSRainbow, e.g. RainbowDelimiterRed instead of TSRainbowRed
• The default query is now called rainbow-delimiters instead of rainbow-parens
• The public Lua module is called rainbow-delimiters instead of ts-rainbow

The name of the default query is now rainbow-delimiters because for some languages like HTML the notion of "parentheses" does not make any sense. In HTML the only meaningful delimiter is the tag. Hence the generic notion of a "delimiter".

Attribution

This is a fork of a previous Neovim plugin, the original repository is available under https://sr.ht/~p00f/nvim-ts-rainbow/.

Attributions from the original author

Huge thanks to @vigoux, @theHamsta, @sogaiu, @bfredl and @sunjon and @steelsojka for all their help

Screenshots

Bash

C

Common Lisp

HTML

Java

LaTeX

Using the rainbow-blocks query to highlight the entire \begin and \end instructions.

Lua

Using the rainbow-blocks query to highlight the entire keywords like function, if, else and end.