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be74807eef
* docs(lua): teach lua2dox how to table * docs(lua): teach gen_vimdoc.py about local functions No more need to mark local functions with @private * docs(lua): mention @nodoc and @meta in dev-lua-doc * fixup! Co-authored-by: Justin M. Keyes <justinkz@gmail.com> --------- Co-authored-by: Justin M. Keyes <justinkz@gmail.com>
140 lines
4.4 KiB
Lua
140 lines
4.4 KiB
Lua
---@defgroup vim.highlight
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---
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---@brief
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---Nvim includes a function for highlighting a selection on yank.
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---
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---To enable it, add the following to your `init.vim`:
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---<pre>vim
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--- au TextYankPost * silent! lua vim.highlight.on_yank()
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---</pre>
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---
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---You can customize the highlight group and the duration of
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---the highlight via:
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---<pre>vim
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--- au TextYankPost * silent! lua vim.highlight.on_yank {higroup="IncSearch", timeout=150}
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---</pre>
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---
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---If you want to exclude visual selections from highlighting on yank, use:
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---<pre>vim
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--- au TextYankPost * silent! lua vim.highlight.on_yank {on_visual=false}
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---</pre>
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local api = vim.api
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local M = {}
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--- Table with default priorities used for highlighting:
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--- - `syntax`: `50`, used for standard syntax highlighting
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--- - `treesitter`: `100`, used for tree-sitter-based highlighting
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--- - `semantic_tokens`: `125`, used for LSP semantic token highlighting
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--- - `diagnostics`: `150`, used for code analysis such as diagnostics
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--- - `user`: `200`, used for user-triggered highlights such as LSP document
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--- symbols or `on_yank` autocommands
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M.priorities = {
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syntax = 50,
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treesitter = 100,
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semantic_tokens = 125,
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diagnostics = 150,
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user = 200,
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}
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--- Apply highlight group to range of text.
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---
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---@param bufnr integer Buffer number to apply highlighting to
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---@param ns integer Namespace to add highlight to
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---@param higroup string Highlight group to use for highlighting
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---@param start integer[]|string Start of region as a (line, column) tuple or string accepted by |getpos()|
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---@param finish integer[]|string End of region as a (line, column) tuple or string accepted by |getpos()|
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---@param opts table|nil Optional parameters
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--- - regtype type of range (see |setreg()|, default charwise)
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--- - inclusive boolean indicating whether the range is end-inclusive (default false)
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--- - priority number indicating priority of highlight (default priorities.user)
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function M.range(bufnr, ns, higroup, start, finish, opts)
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opts = opts or {}
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local regtype = opts.regtype or 'v'
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local inclusive = opts.inclusive or false
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local priority = opts.priority or M.priorities.user
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local region = vim.region(bufnr, start, finish, regtype, inclusive)
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for linenr, cols in pairs(region) do
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local end_row
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if cols[2] == -1 then
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end_row = linenr + 1
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cols[2] = 0
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end
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api.nvim_buf_set_extmark(bufnr, ns, linenr, cols[1], {
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hl_group = higroup,
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end_row = end_row,
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end_col = cols[2],
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priority = priority,
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strict = false,
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})
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end
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end
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local yank_ns = api.nvim_create_namespace('hlyank')
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local yank_timer
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--- Highlight the yanked text
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---
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--- @param opts table|nil Optional parameters
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--- - higroup highlight group for yanked region (default "IncSearch")
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--- - timeout time in ms before highlight is cleared (default 150)
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--- - on_macro highlight when executing macro (default false)
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--- - on_visual highlight when yanking visual selection (default true)
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--- - event event structure (default vim.v.event)
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--- - priority integer priority (default |vim.highlight.priorities|`.user`)
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function M.on_yank(opts)
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vim.validate({
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opts = {
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opts,
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function(t)
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if t == nil then
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return true
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else
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return type(t) == 'table'
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end
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end,
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'a table or nil to configure options (see `:h highlight.on_yank`)',
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},
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})
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opts = opts or {}
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local event = opts.event or vim.v.event
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local on_macro = opts.on_macro or false
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local on_visual = (opts.on_visual ~= false)
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if not on_macro and vim.fn.reg_executing() ~= '' then
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return
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end
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if event.operator ~= 'y' or event.regtype == '' then
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return
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end
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if not on_visual and event.visual then
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return
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end
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local higroup = opts.higroup or 'IncSearch'
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local timeout = opts.timeout or 150
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local bufnr = api.nvim_get_current_buf()
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api.nvim_buf_clear_namespace(bufnr, yank_ns, 0, -1)
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if yank_timer then
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yank_timer:close()
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end
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M.range(bufnr, yank_ns, higroup, "'[", "']", {
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regtype = event.regtype,
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inclusive = event.inclusive,
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priority = opts.priority or M.priorities.user,
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})
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yank_timer = vim.defer_fn(function()
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yank_timer = nil
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if api.nvim_buf_is_valid(bufnr) then
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api.nvim_buf_clear_namespace(bufnr, yank_ns, 0, -1)
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end
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end, timeout)
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end
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return M
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