[nvim] add rainbow indents as an option

as requested by @lexisother

colorschemes/main.py

@@ -221,12 +221,15 @@ def file_name(self) -> str:
 
   def generate(self, theme: Theme, output: TextIO) -> None:
     namespace = "dotfiles_colorscheme_"
-    output.write("let {}name = '{}'\n".format(namespace, theme.name))
-    output.write("let {}base16_name = '{}'\n".format(namespace, theme.base16_name))
+    output.write("let {}name = {}\n".format(namespace, json.dumps(theme.name)))
+    output.write("let {}base16_name = {}\n".format(namespace, json.dumps(theme.base16_name)))
+    output.write("let {}is_dark = {}\n".format(namespace, int(theme.is_dark)))
     output.write("let {}base16_colors = [\n".format(namespace))
     for gui_color, cterm_color in zip(theme.base16_colors, ANSI_TO_BASE16_MAPPING):
       output.write(
-        "\\ {{'gui': '{}', 'cterm': '{:02}'}},\n".format(gui_color.css_hex, cterm_color),
+        "\\ {{'gui': '{}', 'cterm': {:2}, 'r': 0x{:02x}, 'g': 0x{:02x}, 'b': 0x{:02x}}},\n".format(
+          gui_color.css_hex, cterm_color, gui_color.r, gui_color.g, gui_color.b
+        ),
       )
     output.write("\\ ]\n")
 

nvim/colors/dotfiles.vim

@@ -51,6 +51,29 @@
       \ 'gui='.(attr) 'cterm='.(attr)
       \ 'guisp='.get(sp, 'gui', 'NONE')
   endfunction
+
+  function! s:hi_raw(group, defs) abort
+    exec 'hi' a:group
+      \ 'guifg='.get(a:defs, 'guifg', 'NONE') 'ctermfg='.get(a:defs, 'ctermfg', 'NONE')
+      \ 'guibg='.get(a:defs, 'guibg', 'NONE') 'ctermbg='.get(a:defs, 'ctermbg', 'NONE')
+      \ 'gui='.get(a:defs, 'gui', 'NONE') 'cterm='.get(a:defs, 'cterm', 'NONE')
+      \ 'guisp='.get(a:defs, 'gui', 'NONE')
+  endfunction
+
+  function! s:mix_colors(color1, color2, factor) abort
+    return {
+    \ 'r': float2nr(round(a:color1.r * (1 - a:factor) + a:color2.r * a:factor)),
+    \ 'g': float2nr(round(a:color1.g * (1 - a:factor) + a:color2.g * a:factor)),
+    \ 'b': float2nr(round(a:color1.b * (1 - a:factor) + a:color2.b * a:factor)),
+    \ }
+  endfunction
+
+  function! s:color_to_css_hex(color) abort
+    return printf('#%02x%02x%02x',
+    \ min([max([a:color.r, 0]), 0xff]),
+    \ min([max([a:color.g, 0]), 0xff]),
+    \ min([max([a:color.b, 0]), 0xff]))
+  endfunction
 " }}}
 
 " General syntax highlighting {{{
@@ -74,6 +97,19 @@
   hi! link IndentBlanklineSpaceCharBlankline Whitespace
   hi! link IndentBlanklineContextChar        Label
 
+  if get(g:, 'dotfiles_rainbow_indent_opacity', 0) !=# 0
+    let g:indent_blankline_char_highlight_list = []
+    for s:color in range(7)
+      call add(g:indent_blankline_char_highlight_list, 'IndentLineRainbow' . s:color)
+      call s:hi_raw('IndentLineRainbow' . s:color, {
+      \ 'ctermfg': s:colors[0x2].cterm,
+      \ 'guifg': s:color_to_css_hex(s:mix_colors(s:colors[0x0], s:colors[8 + s:color], g:dotfiles_rainbow_indent_opacity)),
+      \ 'cterm': 'nocombine',
+      \ 'gui': 'nocombine',
+      \ })
+    endfor | unlet s:color
+  endif
+
   call s:hi('Keyword', 0xE, '', '', '')
   hi! link Statement    Keyword
   hi! link Repeat       Keyword