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fix: set hl groups on colorscheme change #29

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merged 1 commit into from
Nov 28, 2024
Merged

fix: set hl groups on colorscheme change #29

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37 changes: 25 additions & 12 deletions lua/smear_cursor/color.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -33,9 +33,8 @@ local function get_hl_color(group, attr)
return nil
end

-- Get cursor color and normal background color
local cursor_color = get_hl_color("Cursor", "background") or get_hl_color("Normal", "foreground") or "#d0d0d0"
local normal_bg = get_hl_color("Normal", "background") or "none"
local cursor_color = nil
local normal_bg = nil
local transparent_bg_fallback_color = "#303030"

local function hex_to_rgb(hex)
Expand All @@ -60,36 +59,50 @@ local function interpolate_colors(hex1, hex2, t)
end

M.set_hl_groups = function()
-- Retrieve the cursor color and the normal background color if not set by the user
local _cursor_color = cursor_color
or get_hl_color("Cursor", "background")
or get_hl_color("Normal", "foreground")
or "#d0d0d0"
local _normal_bg = normal_bg or get_hl_color("Normal", "background") or "none"

-- Blending breaks with transparent backgrounds
local blending = config.legacy_computing_symbols_support and _normal_bg ~= "none"

vim.api.nvim_set_hl(0, M.hl_group, {
fg = cursor_color,
fg = _cursor_color,
bg = "none",
blend = config.legacy_computing_symbols_support and normal_bg ~= "none" and 100 or 0,
blend = blending and 100 or 0,
})
vim.api.nvim_set_hl(
0,
M.hl_group_inverted,
{ fg = normal_bg == "none" and transparent_bg_fallback_color or normal_bg, bg = cursor_color, blend = 0 }
-- Blending does not work as we'd like with reversed colors
{ fg = _normal_bg == "none" and transparent_bg_fallback_color or _normal_bg, bg = _cursor_color, blend = 0 }
)

M.hl_groups = {}
M.hl_groups_inverted = {}

for i = 1, config.color_levels do
local blend = (i / config.color_levels) ^ (1 / config.gamma)
local blended_cursor_color =
interpolate_colors(normal_bg == "none" and transparent_bg_fallback_color or normal_bg, cursor_color, blend)
local opacity = (i / config.color_levels) ^ (1 / config.gamma)
local blended_cursor_color = interpolate_colors(
_normal_bg == "none" and transparent_bg_fallback_color or _normal_bg,
_cursor_color,
opacity
)
local blended_hl_group = M.hl_group .. i
local blended_hl_group_inverted = M.hl_group_inverted .. i
M.hl_groups[i] = blended_hl_group
M.hl_groups_inverted[i] = blended_hl_group_inverted

vim.api.nvim_set_hl(0, blended_hl_group, {
fg = blended_cursor_color,
bg = normal_bg,
blend = config.legacy_computing_symbols_support and normal_bg ~= "none" and 100 or 0,
bg = _normal_bg,
blend = blending and 100 or 0,
})
vim.api.nvim_set_hl(0, blended_hl_group_inverted, {
fg = normal_bg == "none" and transparent_bg_fallback_color or normal_bg,
fg = _normal_bg == "none" and transparent_bg_fallback_color or _normal_bg,
bg = blended_cursor_color,
blend = 0,
})
Expand Down
1 change: 1 addition & 0 deletions lua/smear_cursor/events.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ M.listen = function()
autocmd CursorMoved * lua require("smear_cursor.events").move_cursor()
autocmd CursorMovedI,WinScrolled * lua require("smear_cursor.events").jump_cursor()
autocmd BufLeave * lua require("smear_cursor.events").flag_switching_buffer()
autocmd ColorScheme * lua require("smear_cursor.color").set_hl_groups()
augroup END
]],
false
Expand Down