Rainbow Parentheses Improved

help you read complex code by showing diff level of parentheses in diff color !!

Description (这里有中文版)

As everyone knows, the most complex codes were composed of a mass of different kinds of parentheses (typically: lisp). This plugin will help you read these codes by showing different levels of parentheses in different colors. You can also find this plugin in www.vim.org.

lisp

html

more

What is improved ?

• no limit of parentheses levels.
• separately edit guifgs and ctermfgs (the colors used for highlighting).
• now you can design your own parentheses such as 'begin' and 'end'.
• you can also configure anything separately for different types of files.
• now you can even decide to let some operators (like + - * / , ==) highlighted with the parentheses together.
• dot separated combined filetype support (:h ft).
• json style configuration used, more understandable and readable, easier for advanced configuration.
• the code is shorter and easier to read now.
• smoother and faster.
• the Chinese document is added.

Referenced:

• http://www.vim.org/scripts/script.php?script_id=1561 (Martin Krischik)
• http://www.vim.org/scripts/script.php?script_id=3772 (kien)

Install

install via Plug:

Plug 'luochen1990/rainbow'
let g:rainbow_active = 1 "set to 0 if you want to enable it later via :RainbowToggle

install manually:

• first, execute the following commands (for windows users, use ~/vimfiles instead of ~/.vim)

   git clone https://github.com/luochen1990/rainbow.git
   cd rainbow
   mkdir -p ~/.vim/plugin ~/.vim/autoload
   cp plugin/* ~/.vim/plugin
   cp autoload/* ~/.vim/autoload

• second, add the follow sentences to your .vimrc or _vimrc :

   let g:rainbow_active = 1 "set to 0 if you want to enable it later via :RainbowToggle

• third, restart your vim and enjoy coding.

Configure

There is an example for advanced configuration, add it to your vimrc and edit it as you wish (just keep the format).

Note: you can remove these lines safely since they are all included by the source code).

let g:rainbow_conf = {
\	'guifgs': ['royalblue3', 'darkorange3', 'seagreen3', 'firebrick'],
\	'ctermfgs': ['lightblue', 'lightyellow', 'lightcyan', 'lightmagenta'],
\	'guis': [''],
\	'cterms': [''],
\	'operators': '_,_',
\	'parentheses': ['start=/(/ end=/)/ fold', 'start=/\[/ end=/\]/ fold', 'start=/{/ end=/}/ fold'],
\	'separately': {
\		'*': {},
\		'markdown': {
\			'parentheses_options': 'containedin=markdownCode contained', "enable rainbow for code blocks only
\		},
\		'lisp': {
\			'guifgs': ['royalblue3', 'darkorange3', 'seagreen3', 'firebrick', 'darkorchid3'], "lisp needs more colors for parentheses :)
\		},
\		'haskell': {
\			'parentheses': ['start=/(/ end=/)/ fold', 'start=/\[/ end=/\]/ fold', 'start=/\v\{\ze[^-]/ end=/}/ fold'], "the haskell lang pragmas should be excluded
\		},
\		'vim': {
\			'parentheses_options': 'containedin=vimFuncBody', "enable rainbow inside vim function body
\		},
\		'perl': {
\			'syn_name_prefix': 'perlBlockFoldRainbow', "solve the [perl indent-depending-on-syntax problem](https://github.com/luochen1990/rainbow/issues/20)
\		},
\		'stylus': {
\			'parentheses': ['start=/{/ end=/}/ fold contains=@colorableGroup'], "[vim css color](https://github.com/ap/vim-css-color) compatibility
\		},
\		'css': 0, "disable this plugin for css files
\	}
\}

• 'guifgs': a list of guifg (:h highlight-guifg), i.e. colors for gui interface, will be used in order
• 'guis': a list of gui (:h highlight-gui), will be used in order
• 'ctermfgs': a list of ctermfg (:h highlight-ctermfg)
• 'cterms': a list of cterm (:h highlight-cterm)
• 'operators': describe the operators you want to highlight (note: be careful about special characters which needs escaping, you can find more examples here, and you can also read the vim help about syn-pattern). note that this option will be overwritten by the step part of parentheses.
• 'parentheses': a list of parentheses definitions, see syntax-for-parentheses-definition.
• 'parentheses_options': parentheses options shared between different parentheses, things like containedin=xxxFuncBody, contains=@Spell (or 'contains=@NoSpell') often appears here. this option is often used to solve 3rd-party-plugin-compatibility problems.
• 'separately': configure for specific filetypes (decided by &ft), key * for filetypes without separate configuration, value 0 means disable rainbow only for this type of files, value "default" means keep the default shim for this filetype (notice: the default shim config will change between plugin version).
• 'syn_name_prefix': add a prefix to name of the syntax definition, this option is often used to solve 3rd-party-plugin-compatibility problems.
• 'after': execute some vim commands after the rainbow syntax rules is defined. it is often used like ['syn clear xxx'] to solve 3rd-party-plugin-compatibility problems.
• 'inherit': which config should be loaded before current config, i.e. which config current config should inherit. Note that if the config should completely inherit from another config, its 'parentheses' option should be set to empty list, or the default config would still be loaded.
• keep a field empty to use the default setting.

In 'separately', 'inherit' can be used to specify rules to apply before applying current rule; it can be a single string specifying the filetype, or a list of filetype strings, where '*' stands for the '*' configuration in 'separately', '' stands for the default configuration.

To get more advanced config examples, try to search throught this tag.

Syntax for parentheses definition

A parentheses definition defines a kind of parentheses and contains parts like start=/(/, step=/,/, stop=/)/, fold, contained, containedin=someSynNames, contains=@Spell, and cluster=someNames, see :h syntax for more details for parts except step and cluster. The content of step is a regex matching the operators within the parentheses that should be highlighted; cluster is a comma-separated list (just like containein) specifying the parenthesis clusters the kind of parentheses, whose default value is default, and default can also be explicitly specified in the cluster list.

Parenthesis clusters can be referred to in contains and containedin with the form #name, thus the nesting parentheses would be highlighted strictly according to their nesting levels. If you want to use top-level highlight for some parentheses, specify the syntax cluster names rainbow generated for the parentheses clusters instead.

User Command

• :RainbowToggle -- you can use it to toggle this plugin on and off.
• :RainbowToggleOn -- turn this plugin on.
• :RainbowToggleOff -- turn this plugin off

3rd Party Plugin Compatibility

You should notice that this plugin is very special, Vim plugins is expected to provide syntax definitions vertically, i.e. one filetype, one syntax definition set:

----------------------------------------------------
|      cpp       |      java       |    python     |
|                |                 |               |
| syn cppKeyword | syn javaKeyword | syn pyKeyword |
| syn cppFunc    | syn javaFunc    | syn pyLambda  |
| syn cppParen   | syn javaParen   | syn pyParen   |
| ...            | ...             | ...           |
----------------------------------------------------

But this plugin provide syntax definitions horizontally, i.e. parentheses syntax for all filetypes:

----------------------------------------------------
|      cpp       |      java       |    python     |
|                |                 |               |
| syn cppKeyword | syn javaKeyword | syn pyKeyword |
| syn cppFunc    | syn javaFunc    | syn pyLambda  |
| ...            | ...             | ...           |
----------------------------------------------------
|                     rainbow                      |
|                                                  |
| syn cppRainbow   syn javaRainbow   syn pyRainbow |
----------------------------------------------------

You can notice that, to provide rainbow parentheses, this plugin have to define it's own syntax rules, and these rules will overwrite the parentheses syntax provided by the filetype plugin.

It works well at most of the time, but in some special cases, when the parentheses syntax rule is depended somewhere else (e.g. indent, spell checking, nested syntax rules), the things depend on the original syntax rules will be broken.

This plugin has provide some mechanisms to solve the compatibility problems, and have provided default configurations to solve compatibility problems with the default vim syntax files.

But if this plugin is conflicted with some other plugins, you will probably have to solve them by yourself. First, you can search on this issue tag to find whether there is somebody else had the same problem and solved it. Second, you can read the following content about troubleshooting.

Troubleshooting

• rainbow doesn't work at all: find out the current parentheses syntax name, and use the after mechanism to clear these syntax.
• rainbow doesn't work inside some structure: find out the syntax region name, and use the parentheses_options mechanism like 'containedin=xxx'.
• spell checking doesn't work inside parentheses: use the parentheses_options mechanism like 'contains=@Spell'.
• spell checking works inside parentheses but you don't want it: use the parentheses_options mechanism like 'contains=@NoSpell'.
• indent not works correctly: check the indent script you are using and search synID inside it to find which syntax name prefix it depends on, and use the syn_name_prefix mechanism to solve it.

The following keymappings will help you to check the syntax name and definitions under the cursor, add them to your vimrc and restart vim:

nnoremap <f1> :echo synIDattr(synID(line('.'), col('.'), 0), 'name')<cr>
nnoremap <f2> :echo ("hi<" . synIDattr(synID(line("."),col("."),1),"name") . '> trans<'
\ . synIDattr(synID(line("."),col("."),0),"name") . "> lo<"
\ . synIDattr(synIDtrans(synID(line("."),col("."),1)),"name") . ">")<cr>
nnoremap <f3> :echo map(synstack(line('.'), col('.')), 'synIDattr(v:val, "name")')<cr>
nnoremap <f4> :exec 'syn list '.synIDattr(synID(line('.'), col('.'), 0), 'name')<cr>

Move your cursor to a parentheses and press the keys to use them.

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