138 lines
3.4 KiB
Lua
138 lines
3.4 KiB
Lua
-- The MIT License (MIT)
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--
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-- Copyright © 2026 Scott E. Graves <scott.e.graves@protonmail.com>
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--
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-- Permission is hereby granted, free of charge, to any person obtaining a copy of this software
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-- and associated documentation files (the “Software”), to deal in the Software without restriction,
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-- including without limitation the rights to use, copy, modify, merge, publish, distribute,
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-- sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
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-- furnished to do so, subject to the following conditions:
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--
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-- The above copyright notice and this permission notice shall be included in all copies or
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-- substantial portions of the Software.
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--
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-- THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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-- BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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-- NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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-- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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--
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local M = {}
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local focus_id = "textDocument/signatureHelp"
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local timers = {}
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local config = {
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delay = 50,
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border = "rounded",
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max_height = 25,
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max_width = 120,
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wrap = true
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}
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local function normalize_bufnr(bufnr)
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if bufnr == nil or bufnr == 0 then
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return vim.api.nvim_get_current_buf()
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end
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return bufnr
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end
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local function cancel_timer(bufnr)
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local timer = timers[bufnr]
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timers[bufnr] = nil
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if timer and not timer:is_closing() then
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timer:stop()
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timer:close()
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end
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end
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local function close_float(bufnr)
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for _, win in ipairs(vim.api.nvim_list_wins()) do
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local ok, owner = pcall(vim.api.nvim_win_get_var, win, focus_id)
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if ok and owner == bufnr then
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pcall(vim.api.nvim_win_close, win, true)
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end
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end
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end
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function M.close(bufnr)
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bufnr = normalize_bufnr(bufnr)
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cancel_timer(bufnr)
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close_float(bufnr)
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end
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function M.update(bufnr)
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bufnr = normalize_bufnr(bufnr)
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if
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not vim.api.nvim_buf_is_valid(bufnr) or
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bufnr ~= vim.api.nvim_get_current_buf()
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then
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return
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end
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local clients = vim.lsp.get_clients(
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{bufnr = bufnr, method = "textDocument/signatureHelp"}
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)
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if #clients == 0 then
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close_float(bufnr)
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return
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end
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vim.lsp.buf.signature_help(
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{
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anchor_bias = "above",
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border = config.border,
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focusable = false,
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max_height = config.max_height,
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max_width = config.max_width,
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silent = true,
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wrap = config.wrap
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}
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)
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end
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function M.schedule(args)
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local bufnr = normalize_bufnr(args and args.buf)
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cancel_timer(bufnr)
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timers[bufnr] = vim.defer_fn(
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function()
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timers[bufnr] = nil
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M.update(bufnr)
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end,
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config.delay
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)
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end
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function M.setup(opts)
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config = vim.tbl_deep_extend("force", config, opts or {})
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local group = vim.api.nvim_create_augroup("DarculaLspSignature", {clear = true})
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vim.api.nvim_create_autocmd(
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{"TextChangedI", "TextChangedP", "CursorHoldI"},
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{
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callback = M.schedule,
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group = group
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}
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)
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vim.api.nvim_create_autocmd(
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{"InsertLeave", "WinLeave"},
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{
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callback = function(args)
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M.close(args.buf)
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end,
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group = group
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}
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)
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vim.api.nvim_create_autocmd(
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"BufWipeout",
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{
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callback = function(args)
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cancel_timer(args.buf)
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end,
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group = group
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}
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)
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end
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return M
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