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fix(highlight): blend_alpha controls line bg and prefix matches gutter (#178)

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Barrett Ruth 2026-03-08 14:35:55 -04:00 • committed by GitHub
parent e43e6be63d
commit 883b14253b
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5 changed files with 137 additions and 43 deletions
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31
spec/init_spec.lua
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@ -554,7 +554,7 @@ describe('diffs', function()
diffs._test.set_hl_retry_pending(false)
end)
it('omits DiffsClear.bg when Normal.bg is nil (transparent)', function()
it('uses dark fallback bg for DiffsClear when Normal.bg is nil (transparent)', function()
vim.api.nvim_get_hl = function(ns, opts)
if opts.name == 'Normal' then
return { fg = 0xc0c0c0 }
@ -562,11 +562,38 @@ describe('diffs', function()
return saved_get_hl(ns, opts)
end
diffs._test.compute_highlight_groups()
assert.is_nil(set_calls.DiffsClear.bg)
assert.are.equal(0x1a1a1a, set_calls.DiffsClear.bg)
assert.is_table(set_calls.DiffsAdd)
assert.is_table(set_calls.DiffsDelete)
end)
it('blend_alpha controls DiffsAdd.bg intensity', function()
local saved_config_alpha = diffs._test.get_config().highlights.blend_alpha
diffs._test.get_config().highlights.blend_alpha = 0.3
vim.api.nvim_get_hl = function(ns, opts)
if opts.name == 'Normal' then
return { fg = 0xc0c0c0, bg = 0x1e1e2e }
end
if opts.name == 'DiffAdd' then
return { bg = 0x1a3a1a }
end
if opts.name == 'DiffDelete' then
return { bg = 0x3a1a1a }
end
return saved_get_hl(ns, opts)
end
diffs._test.compute_highlight_groups()
local bg_03 = set_calls.DiffsAdd.bg
diffs._test.get_config().highlights.blend_alpha = 0.9
diffs._test.compute_highlight_groups()
local bg_09 = set_calls.DiffsAdd.bg
assert.is_not.equal(bg_03, bg_09)
diffs._test.get_config().highlights.blend_alpha = saved_config_alpha
end)
it('retries once then stops when Normal.bg stays nil', function()
vim.api.nvim_get_hl = function(ns, opts)
if opts.name == 'Normal' then