193 lines
3.8 KiB
VimL
193 lines
3.8 KiB
VimL
scriptencoding utf-8
|
|
" Returns an approximate grey index for the given grey level
|
|
fun! s:grey_number(x)
|
|
if &t_Co == 88
|
|
if a:x < 23
|
|
return 0
|
|
elseif a:x < 69
|
|
return 1
|
|
elseif a:x < 103
|
|
return 2
|
|
elseif a:x < 127
|
|
return 3
|
|
elseif a:x < 150
|
|
return 4
|
|
elseif a:x < 173
|
|
return 5
|
|
elseif a:x < 196
|
|
return 6
|
|
elseif a:x < 219
|
|
return 7
|
|
elseif a:x < 243
|
|
return 8
|
|
else
|
|
return 9
|
|
endif
|
|
else
|
|
if a:x < 14
|
|
return 0
|
|
else
|
|
let l:n = (a:x - 8) / 10
|
|
let l:m = (a:x - 8) % 10
|
|
if l:m < 5
|
|
return l:n
|
|
else
|
|
return l:n + 1
|
|
endif
|
|
endif
|
|
endif
|
|
endfun
|
|
|
|
" Returns the actual grey level represented by the grey index
|
|
fun! s:grey_level(n)
|
|
if &t_Co == 88
|
|
if a:n == 0
|
|
return 0
|
|
elseif a:n == 1
|
|
return 46
|
|
elseif a:n == 2
|
|
return 92
|
|
elseif a:n == 3
|
|
return 115
|
|
elseif a:n == 4
|
|
return 139
|
|
elseif a:n == 5
|
|
return 162
|
|
elseif a:n == 6
|
|
return 185
|
|
elseif a:n == 7
|
|
return 208
|
|
elseif a:n == 8
|
|
return 231
|
|
else
|
|
return 255
|
|
endif
|
|
else
|
|
if a:n == 0
|
|
return 0
|
|
else
|
|
return 8 + (a:n * 10)
|
|
endif
|
|
endif
|
|
endfun
|
|
|
|
" Returns the palette index for the given grey index
|
|
fun! s:grey_colour(n)
|
|
if &t_Co == 88
|
|
if a:n == 0
|
|
return 16
|
|
elseif a:n == 9
|
|
return 79
|
|
else
|
|
return 79 + a:n
|
|
endif
|
|
else
|
|
if a:n == 0
|
|
return 16
|
|
elseif a:n == 25
|
|
return 231
|
|
else
|
|
return 231 + a:n
|
|
endif
|
|
endif
|
|
endfun
|
|
|
|
" Returns an approximate colour index for the given colour level
|
|
fun! s:rgb_number(x)
|
|
if &t_Co == 88
|
|
if a:x < 69
|
|
return 0
|
|
elseif a:x < 172
|
|
return 1
|
|
elseif a:x < 230
|
|
return 2
|
|
else
|
|
return 3
|
|
endif
|
|
else
|
|
if a:x < 75
|
|
return 0
|
|
else
|
|
let l:n = (a:x - 55) / 40
|
|
let l:m = (a:x - 55) % 40
|
|
if l:m < 20
|
|
return l:n
|
|
else
|
|
return l:n + 1
|
|
endif
|
|
endif
|
|
endif
|
|
endfun
|
|
|
|
" Returns the palette index for the given R/G/B colour indices
|
|
fun! s:rgb_colour(x, y, z)
|
|
if &t_Co == 88
|
|
return 16 + (a:x * 16) + (a:y * 4) + a:z
|
|
else
|
|
return 16 + (a:x * 36) + (a:y * 6) + a:z
|
|
endif
|
|
endfun
|
|
|
|
" Returns the actual colour level for the given colour index
|
|
fun! s:rgb_level(n)
|
|
if &t_Co == 88
|
|
if a:n == 0
|
|
return 0
|
|
elseif a:n == 1
|
|
return 139
|
|
elseif a:n == 2
|
|
return 205
|
|
else
|
|
return 255
|
|
endif
|
|
else
|
|
if a:n == 0
|
|
return 0
|
|
else
|
|
return 55 + (a:n * 40)
|
|
endif
|
|
endif
|
|
endfun
|
|
|
|
" Returns the palette index to approximate the given R/G/B colour levels
|
|
fun! s:colour(r, g, b)
|
|
" Get the closest grey
|
|
let l:gx = s:grey_number(a:r)
|
|
let l:gy = s:grey_number(a:g)
|
|
let l:gz = s:grey_number(a:b)
|
|
|
|
" Get the closest colour
|
|
let l:x = s:rgb_number(a:r)
|
|
let l:y = s:rgb_number(a:g)
|
|
let l:z = s:rgb_number(a:b)
|
|
|
|
if l:gx == l:gy && l:gy == l:gz
|
|
" There are two possibilities
|
|
let l:dgr = s:grey_level(l:gx) - a:r
|
|
let l:dgg = s:grey_level(l:gy) - a:g
|
|
let l:dgb = s:grey_level(l:gz) - a:b
|
|
let l:dgrey = (l:dgr * l:dgr) + (l:dgg * l:dgg) + (l:dgb * l:dgb)
|
|
let l:dr = s:rgb_level(l:gx) - a:r
|
|
let l:dg = s:rgb_level(l:gy) - a:g
|
|
let l:db = s:rgb_level(l:gz) - a:b
|
|
let l:drgb = (l:dr * l:dr) + (l:dg * l:dg) + (l:db * l:db)
|
|
if l:dgrey < l:drgb
|
|
" Use the grey
|
|
return s:grey_colour(l:gx)
|
|
else
|
|
" Use the colour
|
|
return s:rgb_colour(l:x, l:y, l:z)
|
|
endif
|
|
else
|
|
" Only one possibility
|
|
return s:rgb_colour(l:x, l:y, l:z)
|
|
endif
|
|
endfun
|
|
|
|
function! coc#color#rgb2term(rgb)
|
|
let l:r = ("0x" . strpart(a:rgb, 0, 2)) + 0
|
|
let l:g = ("0x" . strpart(a:rgb, 2, 2)) + 0
|
|
let l:b = ("0x" . strpart(a:rgb, 4, 2)) + 0
|
|
return s:colour(l:r, l:g, l:b)
|
|
endfun
|