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feat: further customise highlight colors (#31)
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* feat: further customise highlight colors

* Fixes indentation, highlight casing.

* refactor: drop string input add tests

* docs: update docs

* docs: clearer wording

---------

Co-authored-by: tris203 <[email protected]>
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@josh-nz @tris203
josh-nz and tris203 authored May 23, 2024
1 parent 455f527 commit 83d452d
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Showing 3 changed files with 99 additions and 17 deletions.
6 changes: 5 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ return {
config = {
-- startVisible = true,
-- showBlankVirtLine = true,
-- highlightColor = "Comment",
-- highlightColor = { link = "Comment"),
-- hints = {
-- Caret = { text = "^", prio = 2 },
-- Dollar = { text = "$", prio = 1 },
Expand Down Expand Up @@ -52,6 +52,10 @@ return {
- `showBlankVirtLine = false`
Setting this option will mean that if a Virtual Line would be blank it wont be
rendered
- highlightColor can be set in two ways:

1. As a table containing a link property pointing to an existing highlight group (see `:highlight` for valid options).
2. As a table specifying custom highlight values, such as foreground and background colors. ([more info](<https://neovim.io/doc/user/api.html#nvim_set_hl()>))

## ❔Usage

Expand Down
17 changes: 12 additions & 5 deletions lua/precognition/init.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -28,14 +28,14 @@ local M = {}
---@class Precognition.Config
---@field startVisible boolean
---@field showBlankVirtLine boolean
---@field highlightColor string
---@field highlightColor vim.api.keyset.highlight
---@field hints Precognition.HintConfig
---@field gutterHints Precognition.GutterHintConfig

---@class Precognition.PartialConfig
---@field startVisible? boolean
---@field showBlankVirtLine? boolean
---@field highlightColor? string
---@field highlightColor? vim.api.keyset.highlight
---@field hints? Precognition.HintConfig
---@field gutterHints? Precognition.GutterHintConfig

Expand Down Expand Up @@ -72,7 +72,7 @@ local defaultHintConfig = {
local default = {
startVisible = true,
showBlankVirtLine = true,
highlightColor = "Comment",
highlightColor = { link = "Comment" },
hints = defaultHintConfig,
gutterHints = {
--prio is not currentlt used for gutter hints
Expand Down Expand Up @@ -143,7 +143,7 @@ local function build_virt_line(marks, line_len)
if line:match("^%s+$") then
return {}
end
table.insert(virt_line, { line, config.highlightColor })
table.insert(virt_line, { line, "PrecognitionHighlight" })
return virt_line
end

Expand Down Expand Up @@ -175,7 +175,7 @@ local function apply_gutter_hints(gutter_hints, bufnr)
end
vim.fn.sign_define(gutter_name_prefix .. hint, {
text = config.gutterHints[hint].text,
texthl = config.highlightColor,
texthl = "PrecognitionHighlight",
})
local ok, res = pcall(vim.fn.sign_place, 0, gutter_group, gutter_name_prefix .. hint, bufnr, {
lnum = loc,
Expand Down Expand Up @@ -352,9 +352,16 @@ end
---@param opts Precognition.PartialConfig
function M.setup(opts)
config = vim.tbl_deep_extend("force", default, opts or {})
if opts.highlightColor then
config.highlightColor = opts.highlightColor
end

ns = vim.api.nvim_create_namespace("precognition")
au = vim.api.nvim_create_augroup("precognition", { clear = true })

local hl_name = "PrecognitionHighlight"
vim.api.nvim_set_hl(0, hl_name, config.highlightColor)

if config.startVisible then
M.show()
end
Expand Down
93 changes: 82 additions & 11 deletions tests/precognition/e2e_spec.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,17 @@ local function get_gutter_extmarks(buffer)
return gutter_extmarks
end

local function hex2dec(hex)
hex = hex:gsub("#", "")
local r = tonumber("0x" .. hex:sub(1, 2))
local g = tonumber("0x" .. hex:sub(3, 4))
local b = tonumber("0x" .. hex:sub(5, 6))

local dec = (r * 256 ^ 2) + (g * 256) + b

return dec
end

describe("e2e tests", function()
before_each(function()
precognition.setup({})
Expand Down Expand Up @@ -58,16 +69,17 @@ describe("e2e tests", function()

for _, extmark in pairs(gutter_extmarks) do
if extmark[4].sign_text == "G " then
eq("Comment", extmark[4].sign_hl_group)
eq("PrecognitionHighlight", extmark[4].sign_hl_group)
eq({ link = "Comment" }, vim.api.nvim_get_hl(0, { name = extmark[4].sign_hl_group }))
eq(5, extmark[2])
elseif extmark[4].sign_text == "gg" then
eq("Comment", extmark[4].sign_hl_group)
eq("PrecognitionHighlight", extmark[4].sign_hl_group)
eq(0, extmark[2])
elseif extmark[4].sign_text == "{ " then
eq("Comment", extmark[4].sign_hl_group)
eq("PrecognitionHighlight", extmark[4].sign_hl_group)
eq(0, extmark[2])
elseif extmark[4].sign_text == "} " then
eq("Comment", extmark[4].sign_hl_group)
eq("PrecognitionHighlight", extmark[4].sign_hl_group)
eq(2, extmark[2])
else
assert(false, "unexpected sign text")
Expand All @@ -76,7 +88,8 @@ describe("e2e tests", function()

eq(vim.api.nvim_win_get_cursor(0)[1] - 1, extmarks[1])
eq("b e w $", extmarks[3].virt_lines[1][1][1])
eq("Comment", extmarks[3].virt_lines[1][1][2])
eq("PrecognitionHighlight", extmarks[3].virt_lines[1][1][2])
eq({ link = "Comment" }, vim.api.nvim_get_hl(0, { name = extmarks[3].virt_lines[1][1][2] }))

vim.api.nvim_win_set_cursor(0, { 1, 6 })
precognition.on_cursor_moved()
Expand Down Expand Up @@ -134,7 +147,60 @@ describe("e2e tests", function()
end)

it("virtual line text color can be customised", function()
precognition.setup({ highlightColor = "Function" })
precognition.setup({ highlightColor = { link = "Function" } })
local buffer = vim.api.nvim_create_buf(true, false)
vim.api.nvim_set_current_buf(buffer)
vim.api.nvim_buf_set_lines(
buffer,
0,
-1,
false,
{ "Hello World this is a test", "line 2", "", "line 4", "", "line 6" }
)
vim.api.nvim_win_set_cursor(0, { 1, 1 })

precognition.on_cursor_moved()

local extmarks = vim.api.nvim_buf_get_extmark_by_id(buffer, precognition.ns, precognition.extmark, {
details = true,
})

local gutter_extmarks = get_gutter_extmarks(buffer)

for _, extmark in pairs(gutter_extmarks) do
if extmark[4].sign_text == "G " then
eq("PrecognitionHighlight", extmark[4].sign_hl_group)
eq({ link = "Function" }, vim.api.nvim_get_hl(0, { name = extmark[4].sign_hl_group }))
eq(5, extmark[2])
elseif extmark[4].sign_text == "gg" then
eq("PrecognitionHighlight", extmark[4].sign_hl_group)
eq({ link = "Function" }, vim.api.nvim_get_hl(0, { name = extmark[4].sign_hl_group }))
eq(0, extmark[2])
elseif extmark[4].sign_text == "{ " then
eq("PrecognitionHighlight", extmark[4].sign_hl_group)
eq({ link = "Function" }, vim.api.nvim_get_hl(0, { name = extmark[4].sign_hl_group }))
eq(0, extmark[2])
elseif extmark[4].sign_text == "} " then
eq("PrecognitionHighlight", extmark[4].sign_hl_group)
eq({ link = "Function" }, vim.api.nvim_get_hl(0, { name = extmark[4].sign_hl_group }))
eq(2, extmark[2])
else
assert(false, "unexpected sign text")
end
end

eq(vim.api.nvim_win_get_cursor(0)[1] - 1, extmarks[1])
eq("b e w $", extmarks[3].virt_lines[1][1][1])
eq("PrecognitionHighlight", extmarks[3].virt_lines[1][1][2])
eq({ link = "Function" }, vim.api.nvim_get_hl(0, { name = extmarks[3].virt_lines[1][1][2] }))
end)

it("virtual line can be customised without a link", function()
local background = "#00ff00"
local foreground = "#ff0000"
local customColor = { foreground = foreground, background = background }
local customMark = { fg = hex2dec(foreground), bg = hex2dec(background) }
precognition.setup({ highlightColor = customColor })
local buffer = vim.api.nvim_create_buf(true, false)
vim.api.nvim_set_current_buf(buffer)
vim.api.nvim_buf_set_lines(
Expand All @@ -156,16 +222,20 @@ describe("e2e tests", function()

for _, extmark in pairs(gutter_extmarks) do
if extmark[4].sign_text == "G " then
eq("Function", extmark[4].sign_hl_group)
eq("PrecognitionHighlight", extmark[4].sign_hl_group)
eq(customMark, vim.api.nvim_get_hl(0, { name = extmark[4].sign_hl_group }))
eq(5, extmark[2])
elseif extmark[4].sign_text == "gg" then
eq("Function", extmark[4].sign_hl_group)
eq("PrecognitionHighlight", extmark[4].sign_hl_group)
eq(customMark, vim.api.nvim_get_hl(0, { name = extmark[4].sign_hl_group }))
eq(0, extmark[2])
elseif extmark[4].sign_text == "{ " then
eq("Function", extmark[4].sign_hl_group)
eq("PrecognitionHighlight", extmark[4].sign_hl_group)
eq(customMark, vim.api.nvim_get_hl(0, { name = extmark[4].sign_hl_group }))
eq(0, extmark[2])
elseif extmark[4].sign_text == "} " then
eq("Function", extmark[4].sign_hl_group)
eq("PrecognitionHighlight", extmark[4].sign_hl_group)
eq(customMark, vim.api.nvim_get_hl(0, { name = extmark[4].sign_hl_group }))
eq(2, extmark[2])
else
assert(false, "unexpected sign text")
Expand All @@ -174,6 +244,7 @@ describe("e2e tests", function()

eq(vim.api.nvim_win_get_cursor(0)[1] - 1, extmarks[1])
eq("b e w $", extmarks[3].virt_lines[1][1][1])
eq("Function", extmarks[3].virt_lines[1][1][2])
eq("PrecognitionHighlight", extmarks[3].virt_lines[1][1][2])
eq(customMark, vim.api.nvim_get_hl(0, { name = extmarks[3].virt_lines[1][1][2] }))
end)
end)

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