refactor(lsp): split completion module by concern
This commit is contained in:
@@ -0,0 +1,116 @@
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local popup = require("lsp.completion.popup")
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local request = require("lsp.completion.request")
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local GROUP = vim.api.nvim_create_augroup("ow.lsp.completion", { clear = true })
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local M = {}
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---@param capabilities lsp.ClientCapabilities
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function M.apply_capabilities(capabilities)
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capabilities.textDocument.completion.completionItem.snippetSupport = false
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end
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---@param client vim.lsp.Client
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---@param buf integer
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function M.on_attach(client, buf)
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if
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not client:supports_method(
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vim.lsp.protocol.Methods.textDocument_completion
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)
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then
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return
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end
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vim.bo[buf].omnifunc = "v:lua.ow_lsp_completion.omnifunc"
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vim.api.nvim_clear_autocmds({ group = GROUP, buffer = buf })
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vim.api.nvim_create_autocmd("InsertCharPre", {
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buffer = buf,
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group = GROUP,
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callback = request.on_insert_char_pre,
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})
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end
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function M.setup()
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vim.api.nvim_create_autocmd("CompleteChanged", {
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group = GROUP,
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callback = function(ev)
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local completed = vim.v.event.completed_item or {}
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local lsp_item = vim.tbl_get(
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completed,
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"user_data",
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"nvim",
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"lsp",
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"completion_item"
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)
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local client_id =
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vim.tbl_get(completed, "user_data", "nvim", "lsp", "client_id")
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local client = client_id and vim.lsp.get_client_by_id(client_id)
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if not lsp_item or not client then
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vim.schedule(popup.close)
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return
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end
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local ft = vim.bo[ev.buf].filetype
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---@type ow.lsp.completion.Pum
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local pum = {
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row = vim.v.event.row,
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col = vim.v.event.col,
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width = vim.v.event.width,
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height = vim.v.event.height,
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scrollbar = vim.v.event.scrollbar,
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}
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if
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client:supports_method(
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vim.lsp.protocol.Methods.completionItem_resolve
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)
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then
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popup.dispatch_resolve(
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client,
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lsp_item,
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ft,
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pum,
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completed.word,
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ev.buf
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)
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else
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vim.schedule(function()
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popup.show_for(lsp_item, ft, pum)
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end)
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end
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end,
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})
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vim.api.nvim_create_autocmd({ "CompleteDonePre", "InsertLeave" }, {
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group = GROUP,
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callback = popup.close,
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})
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---@param key string
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---@param action fun()
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local function scroll_map(key, action)
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vim.keymap.set("i", key, function()
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if popup.is_visible() then
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vim.schedule(action)
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return ""
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end
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return key
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end, { expr = true, replace_keycodes = true })
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end
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scroll_map("<C-d>", function()
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popup.scroll_half(vim.keycode("<C-e>"))
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end)
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scroll_map("<C-u>", function()
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popup.scroll_half(vim.keycode("<C-y>"))
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end)
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scroll_map("<C-j>", function()
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popup.scroll_line(vim.keycode("<C-e>"))
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end)
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scroll_map("<C-k>", function()
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popup.scroll_line(vim.keycode("<C-y>"))
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end)
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end
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return M
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@@ -0,0 +1,295 @@
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local MAX_WIDTH = 80
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local MAX_HEIGHT = 20
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local NS = vim.api.nvim_create_namespace("ow.lsp.completion.popup")
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local M = {}
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---@class ow.lsp.completion.Pum
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---@field row integer
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---@field col integer
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---@field width integer
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---@field height integer
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---@field scrollbar boolean
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---@class ow.lsp.completion.PendingResolve
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---@field client vim.lsp.Client
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---@field id integer
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---@class ow.lsp.completion.Popup
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---@field winid integer?
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---@field bufnr integer?
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---@field pending ow.lsp.completion.PendingResolve?
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---@type ow.lsp.completion.Popup
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local popup = {
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winid = nil,
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bufnr = nil,
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pending = nil,
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}
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---@param ft string
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---@param text string
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---@return string
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local function fence(ft, text)
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return string.format("```%s\n%s\n```", ft, text)
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end
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---@param item lsp.CompletionItem
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---@return string
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local function signature_of(item)
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return item.detail or vim.tbl_get(item, "labelDetails", "description") or ""
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end
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local function cancel_pending()
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if popup.pending then
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pcall(
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popup.pending.client.cancel_request,
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popup.pending.client,
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popup.pending.id
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)
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popup.pending = nil
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end
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end
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---@return integer bufnr
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local function ensure_buffer()
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if not popup.bufnr or not vim.api.nvim_buf_is_valid(popup.bufnr) then
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popup.bufnr = vim.api.nvim_create_buf(false, true)
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vim.bo[popup.bufnr].buftype = "nofile"
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vim.bo[popup.bufnr].bufhidden = "hide"
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vim.bo[popup.bufnr].swapfile = false
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pcall(vim.treesitter.start, popup.bufnr, "markdown")
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end
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return popup.bufnr
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end
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local function update_indicators()
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if not popup.winid or not vim.api.nvim_win_is_valid(popup.winid) then
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return
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end
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local visible = vim.api.nvim_win_get_height(popup.winid)
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local topline, botline =
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unpack(vim.api.nvim_win_call(popup.winid, function()
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return { vim.fn.line("w0"), vim.fn.line("w$") }
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end))
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local ok_total, info_total =
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pcall(vim.api.nvim_win_text_height, popup.winid, {})
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local total = ok_total and info_total.all or visible
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local display_topline = 1
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if topline > 1 then
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local ok, info = pcall(vim.api.nvim_win_text_height, popup.winid, {
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end_row = topline - 2,
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})
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if ok then
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display_topline = (info.all or 0) + 1
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end
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end
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local display_bot = display_topline + visible - 1
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local has_above = display_topline > 1
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local has_below = display_bot < total
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and botline
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< vim.api.nvim_buf_line_count(vim.api.nvim_win_get_buf(popup.winid))
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pcall(vim.api.nvim_win_set_config, popup.winid, {
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title = has_above and { { "▲ ", "FloatBorder" } } or "",
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title_pos = has_above and "right" or nil,
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footer = has_below and { { "▼ ", "FloatBorder" } } or "",
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footer_pos = has_below and "right" or nil,
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})
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end
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function M.close()
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cancel_pending()
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if popup.winid and vim.api.nvim_win_is_valid(popup.winid) then
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pcall(vim.api.nvim_win_close, popup.winid, true)
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end
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popup.winid = nil
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end
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---@param content string
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---@param pum ow.lsp.completion.Pum
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---@param width integer
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local function show(content, pum, width)
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local bufnr = ensure_buffer()
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local lines = vim.split(content, "\n", { plain = true })
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vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, lines)
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vim.api.nvim_buf_clear_namespace(bufnr, NS, 0, -1)
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for i, line in ipairs(lines) do
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if line ~= "" and line:gsub("─", "") == "" then
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vim.api.nvim_buf_set_extmark(bufnr, NS, i - 1, 0, {
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end_row = i - 1,
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end_col = #line,
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hl_group = "FloatBorder",
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priority = 200,
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})
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end
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end
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width = math.min(width, MAX_WIDTH)
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local height = math.min(#lines, MAX_HEIGHT)
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local right_edge = pum.col + pum.width + (pum.scrollbar and 1 or 0)
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local right_space = vim.o.columns - right_edge
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local col
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if right_space >= width + 2 then
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col = right_edge
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else
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col = math.max(pum.col - width - 2, 0)
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end
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local cfg = {
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relative = "editor",
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row = pum.row,
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col = col,
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width = width,
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height = height,
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border = "rounded",
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focusable = false,
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style = "minimal",
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}
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if popup.winid and vim.api.nvim_win_is_valid(popup.winid) then
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pcall(vim.api.nvim_win_set_config, popup.winid, cfg)
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else
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cfg.noautocmd = true
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popup.winid = vim.api.nvim_open_win(bufnr, false, cfg)
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vim.wo[popup.winid].wrap = true
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vim.wo[popup.winid].linebreak = true
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vim.wo[popup.winid].conceallevel = 2
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end
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pcall(vim.api.nvim_win_set_cursor, popup.winid, { 1, 0 })
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local ok, info = pcall(vim.api.nvim_win_text_height, popup.winid, {})
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if ok and info.all and info.all ~= height then
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pcall(
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vim.api.nvim_win_set_height,
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popup.winid,
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math.min(info.all, MAX_HEIGHT)
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)
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end
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update_indicators()
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end
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---@param item lsp.CompletionItem
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---@param ft string
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---@return string? content
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---@return integer? width
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local function build_content(item, ft)
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local signature = signature_of(item)
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local doc = item.documentation
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if type(doc) == "table" then
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doc = doc.value
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end
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doc = doc or ""
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local code_parts = {}
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if item.additionalTextEdits then
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for _, edit in ipairs(item.additionalTextEdits) do
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local text = (edit.newText or ""):gsub("%s+$", "")
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if text ~= "" then
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table.insert(code_parts, fence(ft, text))
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end
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end
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end
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if signature ~= "" then
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table.insert(code_parts, fence(ft, signature))
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end
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local sections = {}
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if #code_parts > 0 then
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table.insert(sections, table.concat(code_parts, "\n\n"))
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end
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if doc ~= "" then
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table.insert(sections, doc)
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end
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if #sections == 0 then
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return nil, nil
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end
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local max_w = 0
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for _, s in ipairs(sections) do
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for _, line in ipairs(vim.split(s, "\n", { plain = true })) do
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max_w = math.max(max_w, vim.fn.strdisplaywidth(line))
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end
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end
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local sep = "\n" .. string.rep("─", math.min(max_w, MAX_WIDTH)) .. "\n"
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return table.concat(sections, sep), max_w
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end
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--- Build content for `item` and show, or close if there's nothing to render.
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---@param item lsp.CompletionItem
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---@param ft string
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---@param pum ow.lsp.completion.Pum
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function M.show_for(item, ft, pum)
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local content, width = build_content(item, ft)
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if content and width then
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show(content, pum, width)
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else
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M.close()
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end
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end
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--- Cancel any in-flight resolve, dispatch a fresh one for `item`, and on
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--- response render the resolved popup. If the user moved the selection
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--- before the response landed (`completed.word` mismatch), do nothing.
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---@param client vim.lsp.Client
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---@param item lsp.CompletionItem
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---@param ft string
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---@param pum ow.lsp.completion.Pum
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---@param word string
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---@param buf integer
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function M.dispatch_resolve(client, item, ft, pum, word, buf)
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cancel_pending()
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local _, request_id = client:request(
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vim.lsp.protocol.Methods.completionItem_resolve,
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item,
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function(err, result)
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popup.pending = nil
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if err or not result then
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return
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end
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local cur = vim.fn.complete_info({ "completed" })
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if (vim.tbl_get(cur, "completed", "word") or "") ~= word then
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return
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end
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M.show_for(result, ft, pum)
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end,
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buf
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)
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if request_id then
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popup.pending = { client = client, id = request_id }
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end
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end
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---@return boolean
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function M.is_visible()
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return popup.winid ~= nil and vim.api.nvim_win_is_valid(popup.winid)
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end
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---@param direction string single-line scroll keycode (<C-e> or <C-y>)
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---@param count integer
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local function scroll(direction, count)
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if not M.is_visible() then
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return
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end
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vim.api.nvim_win_call(popup.winid, function()
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vim.cmd.normal({ args = { count .. direction }, bang = true })
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end)
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update_indicators()
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end
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---@param direction string single-line scroll keycode (<C-e> or <C-y>)
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function M.scroll_line(direction)
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scroll(direction, 1)
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end
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---@param direction string single-line scroll keycode (<C-e> or <C-y>)
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function M.scroll_half(direction)
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scroll(direction, math.floor(MAX_HEIGHT / 2))
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end
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return M
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@@ -0,0 +1,302 @@
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local kind = require("lsp.kind")
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local util = require("util")
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local REQUEST_DEBOUNCE_MS = 100
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local M = {}
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---@class ow.lsp.completion.Request
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---@field generation integer
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---@field phase ('awaiting' | 'ready' | 'done')?
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---@field result table?
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---@field cancel function?
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---@type ow.lsp.completion.Request
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local request = {
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generation = 0,
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phase = nil,
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result = nil,
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cancel = nil,
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}
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local function discard_request()
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if request.cancel then
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pcall(request.cancel)
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end
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request.generation = request.generation + 1
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request.phase = nil
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request.result = nil
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request.cancel = nil
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end
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local function buffer_has_completion_client()
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return #vim.lsp.get_clients({
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bufnr = 0,
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method = vim.lsp.protocol.Methods.textDocument_completion,
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}) > 0
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end
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--- Normalize an `itemDefaults.editRange` to a plain Range, since it may be
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--- either `Range` or `{ insert: Range, replace: Range }`.
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---@param edit_range table?
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---@return table?
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local function default_range(edit_range)
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if type(edit_range) ~= "table" then
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return nil
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end
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return edit_range.insert or (edit_range.start and edit_range) or nil
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end
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--- Normalize an item's `textEdit`, which may be `TextEdit` (has `range`) or
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--- `InsertReplaceEdit` (has `insert`/`replace`).
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---@param item lsp.CompletionItem
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---@return table?
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local function item_range(item)
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local te = item.textEdit
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if type(te) ~= "table" then
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return nil
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end
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return te.range or te.insert
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end
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---@param response table LSP response entry (as returned by buf_request_all)
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---@return integer? character 0-indexed UTF-16 character where edit starts
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local function response_edit_start(response)
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if not response.result or response.err or response.error then
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return nil
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end
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local defaults =
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default_range(vim.tbl_get(response.result, "itemDefaults", "editRange"))
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if defaults then
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return defaults.start.character
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end
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local items = response.result.items or response.result
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if type(items) ~= "table" then
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return nil
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end
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for _, item in ipairs(items) do
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local range = item_range(item)
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if range then
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return range.start.character
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end
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end
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return nil
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||||
end
|
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||||
---@return integer byte_col 0-indexed byte column for completefunc findstart
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local function resolve_start_col()
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for _, response in pairs(request.result or {}) do
|
||||
local col = response_edit_start(response)
|
||||
if col then
|
||||
return col
|
||||
end
|
||||
end
|
||||
local line = vim.api.nvim_get_current_line()
|
||||
local cursor_col = vim.fn.col(".") - 1
|
||||
return vim.fn.match(line:sub(1, cursor_col), "\\k*$")
|
||||
end
|
||||
|
||||
---@param item lsp.CompletionItem
|
||||
---@return string
|
||||
local function item_word(item)
|
||||
local edit = item.textEdit
|
||||
if type(edit) == "table" and edit.newText then
|
||||
return edit.newText
|
||||
end
|
||||
return item.insertText or item.label
|
||||
end
|
||||
|
||||
---@param items lsp.CompletionItem[]
|
||||
---@param defaults? table
|
||||
local function apply_defaults(items, defaults)
|
||||
if type(defaults) ~= "table" then
|
||||
return
|
||||
end
|
||||
local range = default_range(defaults.editRange)
|
||||
for _, item in ipairs(items) do
|
||||
item.commitCharacters = item.commitCharacters
|
||||
or defaults.commitCharacters
|
||||
item.data = item.data or defaults.data
|
||||
item.insertTextFormat = item.insertTextFormat
|
||||
or defaults.insertTextFormat
|
||||
item.insertTextMode = item.insertTextMode or defaults.insertTextMode
|
||||
if range and type(item.textEdit) ~= "table" then
|
||||
item.textEdit = {
|
||||
range = range,
|
||||
newText = item.textEditText or item.insertText or item.label,
|
||||
}
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
---@param base string
|
||||
---@return table[]
|
||||
local function to_complete_items(base)
|
||||
local entries = {}
|
||||
for client_id, response in pairs(request.result or {}) do
|
||||
if response.result and not (response.err or response.error) then
|
||||
local raw = response.result.items or response.result
|
||||
if type(raw) == "table" then
|
||||
apply_defaults(raw, response.result.itemDefaults)
|
||||
for _, item in ipairs(raw) do
|
||||
entries[#entries + 1] =
|
||||
{ item = item, client_id = client_id }
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
if base ~= "" then
|
||||
entries = vim.tbl_filter(function(entry)
|
||||
local key = entry.item.filterText or entry.item.label
|
||||
return vim.startswith(key, base)
|
||||
end, entries)
|
||||
end
|
||||
|
||||
table.sort(entries, function(a, b)
|
||||
local ka = a.item.sortText or a.item.label
|
||||
local kb = b.item.sortText or b.item.label
|
||||
return ka < kb
|
||||
end)
|
||||
|
||||
local result = {}
|
||||
for _, entry in ipairs(entries) do
|
||||
local item = entry.item
|
||||
local kind_icon, kind_hl = kind.get(item.kind)
|
||||
result[#result + 1] = {
|
||||
word = item_word(item),
|
||||
abbr = item.label:match("[^(]+") or item.label,
|
||||
menu = "",
|
||||
kind = kind_icon,
|
||||
kind_hlgroup = kind_hl,
|
||||
-- non-empty so our CompleteChanged handler triggers resolve
|
||||
info = " ",
|
||||
icase = 1,
|
||||
dup = 1,
|
||||
empty = 1,
|
||||
user_data = {
|
||||
nvim = {
|
||||
lsp = {
|
||||
completion_item = item,
|
||||
client_id = entry.client_id,
|
||||
},
|
||||
},
|
||||
},
|
||||
}
|
||||
end
|
||||
return result
|
||||
end
|
||||
|
||||
local function feed_user_completion()
|
||||
if vim.fn.mode() ~= "i" or vim.fn.pumvisible() ~= 0 then
|
||||
return
|
||||
end
|
||||
vim.api.nvim_feedkeys(vim.keycode("<C-x><C-o>"), "n", false)
|
||||
end
|
||||
|
||||
---@param trigger_kind integer
|
||||
---@param trigger_char string?
|
||||
local function dispatch_request(trigger_kind, trigger_char)
|
||||
discard_request()
|
||||
request.phase = "awaiting"
|
||||
local gen = request.generation
|
||||
local buf = vim.api.nvim_get_current_buf()
|
||||
local params = vim.lsp.util.make_position_params(0, "utf-16")
|
||||
---@cast params lsp.CompletionParams
|
||||
params.context = {
|
||||
triggerKind = trigger_kind,
|
||||
triggerCharacter = trigger_char,
|
||||
}
|
||||
request.cancel = vim.lsp.buf_request_all(
|
||||
buf,
|
||||
vim.lsp.protocol.Methods.textDocument_completion,
|
||||
params,
|
||||
function(result)
|
||||
if request.generation ~= gen or request.phase ~= "awaiting" then
|
||||
return
|
||||
end
|
||||
request.phase = "ready"
|
||||
request.result = result
|
||||
feed_user_completion()
|
||||
end
|
||||
)
|
||||
end
|
||||
|
||||
---@param char string
|
||||
---@return boolean
|
||||
local function is_trigger_char(char)
|
||||
local clients = vim.lsp.get_clients({
|
||||
bufnr = 0,
|
||||
method = vim.lsp.protocol.Methods.textDocument_completion,
|
||||
})
|
||||
for _, client in ipairs(clients) do
|
||||
local chars = vim.tbl_get(
|
||||
client,
|
||||
"server_capabilities",
|
||||
"completionProvider",
|
||||
"triggerCharacters"
|
||||
)
|
||||
if chars and vim.list_contains(chars, char) then
|
||||
return true
|
||||
end
|
||||
end
|
||||
return false
|
||||
end
|
||||
|
||||
local debounce = util.debounce(function(_, trigger_kind, char)
|
||||
if vim.fn.mode() ~= "i" then
|
||||
return
|
||||
end
|
||||
dispatch_request(trigger_kind, char)
|
||||
end, REQUEST_DEBOUNCE_MS)
|
||||
|
||||
function M.on_insert_char_pre()
|
||||
local char = vim.v.char
|
||||
if char == "" then
|
||||
return
|
||||
end
|
||||
local is_word = char:match("[%w_]") ~= nil
|
||||
local is_trigger = not is_word and is_trigger_char(char)
|
||||
if not (is_word or is_trigger) then
|
||||
return
|
||||
end
|
||||
-- For word chars, let Vim's native in-place filtering handle things while
|
||||
-- the pum is already showing. Trigger chars always schedule a request
|
||||
-- because they change the completion context (e.g. member access).
|
||||
if is_word and vim.fn.pumvisible() ~= 0 then
|
||||
return
|
||||
end
|
||||
|
||||
local kind_num = is_trigger
|
||||
and vim.lsp.protocol.CompletionTriggerKind.TriggerCharacter
|
||||
or vim.lsp.protocol.CompletionTriggerKind.Invoked
|
||||
debounce:call(nil, kind_num, is_trigger and char or nil)
|
||||
end
|
||||
|
||||
_G.ow_lsp_completion = _G.ow_lsp_completion or {}
|
||||
|
||||
--- Returns cached items without re-requesting, which is what lets Vim filter
|
||||
--- the popup in-place on backspace.
|
||||
---@param findstart 0 | 1
|
||||
---@param base string
|
||||
---@return integer | table
|
||||
function _G.ow_lsp_completion.omnifunc(findstart, base)
|
||||
if not buffer_has_completion_client() or request.phase == "awaiting" then
|
||||
return findstart == 1 and -3 or {}
|
||||
end
|
||||
|
||||
if request.phase ~= "ready" then
|
||||
dispatch_request(vim.lsp.protocol.CompletionTriggerKind.Invoked)
|
||||
return findstart == 1 and -3 or {}
|
||||
end
|
||||
|
||||
if findstart == 1 then
|
||||
return resolve_start_col()
|
||||
end
|
||||
|
||||
local items = to_complete_items(base)
|
||||
request.phase = "done"
|
||||
return items
|
||||
end
|
||||
|
||||
return M
|
||||
Reference in New Issue
Block a user