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fix(colorify): clamp RGBA values to prevent invalid hex strings (reopened PR #500) #520

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fix(colorify): clamp RGBA values to prevent invalid hex strings (reopened PR #500) #520

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10 changes: 9 additions & 1 deletion lua/nvchad/colorify/methods.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,14 @@ local needs_hl = utils.not_colored

local M = {}

local function to_hex(r, g, b, a)
local clamp = function(x)
x = math.floor((x or 0) * (a or 1) * 255 + 0.5)
return math.max(0, math.min(x, 255))
end
return string.format("#%02x%02x%02x", clamp(r), clamp(g), clamp(b))
end

M.hex = function(buf, line, str)
for col, hex in str:gmatch "()(#%x%x%x%x%x%x)" do
col = col - 1
Expand Down Expand Up @@ -53,7 +61,7 @@ M.lsp_var = function(buf, line, min, max)
a = a / 255
end

local hex = string.format("#%02x%02x%02x", r * a * 255, g * a * 255, b * a * 255)
local hex = to_hex(r, g, b, a)

local hl_group = utils.add_hl(hex)

Expand Down