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zsh-syntax-highlighting/highlighters/brackets
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Daniel Shahaf cdd7f899cb brackets: Optimize the character iteration 
Test case: See the first comment of issue #295.

Before:
num  calls                time                       self            name
-----------------------------------------------------------------------------------
 1)   14         284.67    20.33   82.84%    284.67    20.33   82.84%  _zsh_highlight_highlighter_brackets_paint
 2)   15         313.72    20.91   91.30%     26.62     1.77    7.75%  _zsh_highlight
 3)   14         318.68    22.76   92.74%      7.41     0.53    2.16%  _zsh_highlight_call_widget

After:
num  calls                time                       self            name
-----------------------------------------------------------------------------------
 1)   15          57.25     3.82   45.33%     28.30     1.89   22.41%  _zsh_highlight
 2)   14          81.96     5.85   64.90%     27.02     1.93   21.40%  _zsh_highlight_call_widget
 3)   14          26.31     1.88   20.84%     26.31     1.88   20.84%  _zsh_highlight_highlighter_brackets_paint
 4)    2          10.66     5.33    8.44%      8.97     4.49    7.10%  VCS_INFO_formats
 5)    2          25.92    12.96   20.52%      7.72     3.86    6.11%  VCS_INFO_get_data_git

(That's not in my everyday configuration but in my minimal testing
setup, which runs vcs_info with the default settings.)
2020-07-14 20:19:40 +00:00
..
test-data
brackets-highlighter.zsh brackets: Optimize the character iteration 2020-07-14 20:19:40 +00:00
README.md

README.md

zsh-syntax-highlighting / highlighters / brackets

This is the brackets highlighter, that highlights brackets and parentheses, and matches them.

How to tweak it

This highlighter defines the following styles:

  • bracket-error - unmatched brackets
  • bracket-level-N - brackets with nest level N
  • cursor-matchingbracket - the matching bracket, if cursor is on a bracket

To override one of those styles, change its entry in ZSH_HIGHLIGHT_STYLES, for example in ~/.zshrc:

# To define styles for nested brackets up to level 4
ZSH_HIGHLIGHT_STYLES[bracket-level-1]='fg=blue,bold'
ZSH_HIGHLIGHT_STYLES[bracket-level-2]='fg=red,bold'
ZSH_HIGHLIGHT_STYLES[bracket-level-3]='fg=yellow,bold'
ZSH_HIGHLIGHT_STYLES[bracket-level-4]='fg=magenta,bold'

The syntax for values is the same as the syntax of "types of highlighting" of the zsh builtin $zle_highlight array, which is documented in the zshzle(1) manual page.