See unwanted characters

Recipes & Guides
1 
# Options
add-highlighter global/ show-whitespaces

# Color scheme
colorscheme dracula

declare-option str background 'rgb:282a36'
declare-option str dimmed_background 'rgb:44475a'

# Highlighters
# Hook on filetype is required
hook global WinSetOption filetype=.* %{
  add-highlighter window/whitespace regex '\h+' "0:%opt{background}"
  add-highlighter window/newline regex '\n+' "0:%opt{dimmed_background}"
  add-highlighter window/trailing-whitespaces regex '\h+$' 0:red
  add-highlighter window/non-breaking-space regex ' +' 0:red
  add-highlighter window/not-two-spaces-after-sentence regex '[?!.…]\K\h(\h{2,})?(?=\w)' 0:red
  add-highlighter window/two-spaces-after-sentence regex '[?!.…]\K\h{2}(?=\w)' 0:green
  add-highlighter window/multiple-whitespaces-after-word regex '\w\K\h{2,}' 0:red
  add-highlighter window/apostrophe regex '\w\K''(?=\w)' 0:red
  add-highlighter window/cesure regex '‐+' 0:red
  add-highlighter window/range-of-values regex '‑+' 0:blue
  add-highlighter window/u+2013 regex '–+' 0:green
  add-highlighter window/u+2014 regex '—+' 0:green+b
  add-highlighter window/u+2015 regex '―+' 0:red
  add-highlighter window/math regex '[−×]+' 0:cyan
  add-highlighter window/opening-quotation-mark regex '[“‘]+' 0:cyan
  add-highlighter window/closing-quotation-mark regex '”+' 0:cyan+u
}
1 Like
2

Extracted in a module.

set-face global ShowCharactersBackground %opt{background}
set-face global ShowCharactersDimmedBackground %opt{dimmed_background}

# Hook on filetype is required
hook global WinSetOption filetype=.* %{
  require-module show-characters
  add-highlighter window/ ref show-characters
  hook -always -once window WinSetOption filetype=.* %{
    remove-highlighter window/show-characters
  }
}

provide-module show-characters %🐈
  add-highlighter shared/show-characters regions
  add-highlighter shared/show-characters/code default-region group
  add-highlighter shared/show-characters/code/whitespace regex '\h+' 0:ShowCharactersBackground
  add-highlighter shared/show-characters/code/newline regex '\n+' 0:ShowCharactersDimmedBackground
  add-highlighter shared/show-characters/code/trailing-whitespaces regex '\h+$' 0:red
  add-highlighter shared/show-characters/code/non-breaking-space regex ' +' 0:red
  add-highlighter shared/show-characters/code/not-two-spaces-after-sentence regex '[?!.…]\K\h(\h{2,})?(?=\w)' 0:red
  add-highlighter shared/show-characters/code/two-spaces-after-sentence regex '[?!.…]\K\h{2}(?=\w)' 0:green
  add-highlighter shared/show-characters/code/multiple-whitespaces-after-word regex '\w\K\h{2,}' 0:red
  add-highlighter shared/show-characters/code/apostrophe regex '\w\K''(?=\w)' 0:red
  add-highlighter shared/show-characters/code/cesure regex '‐+' 0:red
  add-highlighter shared/show-characters/code/range-of-values regex '‑+' 0:blue
  add-highlighter shared/show-characters/code/u+2013 regex '–+' 0:green
  add-highlighter shared/show-characters/code/u+2014 regex '—+' 0:green+b
  add-highlighter shared/show-characters/code/u+2015 regex '―+' 0:red
  add-highlighter shared/show-characters/code/math regex '[−×]+' 0:cyan
  add-highlighter shared/show-characters/code/opening-quotation-mark regex '[“‘]+' 0:cyan
  add-highlighter shared/show-characters/code/closing-quotation-mark regex '”+' 0:cyan+u
🐈