mirror of
https://github.com/neovim/neovim.git
synced 2025-09-06 03:18:16 +00:00
280 lines
9.7 KiB
Lua
280 lines
9.7 KiB
Lua
local validate = vim.validate
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local api = vim.api
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local vfn = vim.fn
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local util = require 'vim.lsp.util'
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local protocol = require 'vim.lsp.protocol'
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local log = require 'vim.lsp.log'
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local M = {}
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local function ok_or_nil(status, ...)
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if not status then return end
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return ...
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end
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local function npcall(fn, ...)
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return ok_or_nil(pcall(fn, ...))
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end
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local function err_message(...)
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api.nvim_err_writeln(table.concat(vim.tbl_flatten{...}))
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api.nvim_command("redraw")
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end
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local function find_window_by_var(name, value)
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for _, win in ipairs(api.nvim_list_wins()) do
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if npcall(api.nvim_win_get_var, win, name) == value then
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return win
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end
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end
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end
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local function request(method, params, callback)
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-- TODO(ashkan) enable this.
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-- callback = vim.lsp.default_callbacks[method] or callback
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validate {
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method = {method, 's'};
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callback = {callback, 'f'};
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}
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return vim.lsp.buf_request(0, method, params, function(err, _, result, client_id)
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local _ = log.debug() and log.debug("vim.lsp.buf", method, client_id, err, result)
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if err then error(tostring(err)) end
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return callback(err, method, result, client_id)
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end)
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end
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local function focusable_preview(method, params, fn)
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if npcall(api.nvim_win_get_var, 0, method) then
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return api.nvim_command("wincmd p")
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end
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local bufnr = api.nvim_get_current_buf()
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do
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local win = find_window_by_var(method, bufnr)
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if win then
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return api.nvim_set_current_win(win)
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end
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end
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return request(method, params, function(_, _, result, _)
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-- TODO(ashkan) could show error in preview...
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local lines, filetype, opts = fn(result)
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if lines then
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local _, winnr = util.open_floating_preview(lines, filetype, opts)
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api.nvim_win_set_var(winnr, method, bufnr)
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end
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end)
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end
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function M.hover()
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local params = protocol.make_text_document_position_params()
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focusable_preview('textDocument/hover', params, function(result)
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if not (result and result.contents) then return end
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local markdown_lines = util.convert_input_to_markdown_lines(result.contents)
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markdown_lines = util.trim_empty_lines(markdown_lines)
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if vim.tbl_isempty(markdown_lines) then
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return { 'No information available' }
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end
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return markdown_lines, util.try_trim_markdown_code_blocks(markdown_lines)
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end)
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end
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function M.peek_definition()
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local params = protocol.make_text_document_position_params()
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request('textDocument/peekDefinition', params, function(_, _, result, _)
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if not (result and result[1]) then return end
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local loc = result[1]
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local bufnr = vim.uri_to_bufnr(loc.uri) or error("couldn't find file "..tostring(loc.uri))
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local start = loc.range.start
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local finish = loc.range["end"]
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util.open_floating_peek_preview(bufnr, start, finish, { offset_x = 1 })
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local headbuf = util.open_floating_preview({"Peek:"}, nil, {
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offset_y = -(finish.line - start.line);
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width = finish.character - start.character + 2;
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})
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-- TODO(ashkan) change highlight group?
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api.nvim_buf_add_highlight(headbuf, -1, 'Keyword', 0, -1)
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end)
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end
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local function update_tagstack()
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local bufnr = api.nvim_get_current_buf()
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local line = vfn.line('.')
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local col = vfn.col('.')
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local tagname = vfn.expand('<cWORD>')
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local item = { bufnr = bufnr, from = { bufnr, line, col, 0 }, tagname = tagname }
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local winid = vfn.win_getid()
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local tagstack = vfn.gettagstack(winid)
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local action
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if tagstack.length == tagstack.curidx then
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action = 'r'
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tagstack.items[tagstack.curidx] = item
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elseif tagstack.length > tagstack.curidx then
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action = 'r'
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if tagstack.curidx > 1 then
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tagstack.items = table.insert(tagstack.items[tagstack.curidx - 1], item)
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else
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tagstack.items = { item }
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end
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else
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action = 'a'
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tagstack.items = { item }
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end
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tagstack.curidx = tagstack.curidx + 1
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vfn.settagstack(winid, tagstack, action)
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end
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local function handle_location(result)
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-- We can sometimes get a list of locations, so set the first value as the
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-- only value we want to handle
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-- TODO(ashkan) was this correct^? We could use location lists.
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if result[1] ~= nil then
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result = result[1]
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end
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if result.uri == nil then
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err_message('[LSP] Could not find a valid location')
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return
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end
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local result_file = vim.uri_to_fname(result.uri)
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local bufnr = vfn.bufadd(result_file)
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update_tagstack()
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api.nvim_set_current_buf(bufnr)
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local start = result.range.start
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api.nvim_win_set_cursor(0, {start.line + 1, start.character})
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return true
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end
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local function location_callback(_, method, result)
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if result == nil or vim.tbl_isempty(result) then
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local _ = log.info() and log.info(method, 'No location found')
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return nil
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end
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return handle_location(result)
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end
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function M.declaration()
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local params = protocol.make_text_document_position_params()
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request('textDocument/declaration', params, location_callback)
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end
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function M.definition()
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local params = protocol.make_text_document_position_params()
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request('textDocument/definition', params, location_callback)
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end
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function M.type_definition()
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local params = protocol.make_text_document_position_params()
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request('textDocument/typeDefinition', params, location_callback)
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end
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function M.implementation()
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local params = protocol.make_text_document_position_params()
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request('textDocument/implementation', params, location_callback)
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end
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--- Convert SignatureHelp response to preview contents.
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-- https://microsoft.github.io/language-server-protocol/specifications/specification-3-14/#textDocument_signatureHelp
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local function signature_help_to_preview_contents(input)
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if not input.signatures then
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return
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end
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--The active signature. If omitted or the value lies outside the range of
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--`signatures` the value defaults to zero or is ignored if `signatures.length
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--=== 0`. Whenever possible implementors should make an active decision about
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--the active signature and shouldn't rely on a default value.
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local contents = {}
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local active_signature = input.activeSignature or 0
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-- If the activeSignature is not inside the valid range, then clip it.
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if active_signature >= #input.signatures then
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active_signature = 0
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end
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local signature = input.signatures[active_signature + 1]
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if not signature then
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return
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end
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vim.list_extend(contents, vim.split(signature.label, '\n', true))
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if signature.documentation then
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util.convert_input_to_markdown_lines(signature.documentation, contents)
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end
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if input.parameters then
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local active_parameter = input.activeParameter or 0
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-- If the activeParameter is not inside the valid range, then clip it.
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if active_parameter >= #input.parameters then
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active_parameter = 0
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end
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local parameter = signature.parameters and signature.parameters[active_parameter]
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if parameter then
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--[=[
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--Represents a parameter of a callable-signature. A parameter can
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--have a label and a doc-comment.
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interface ParameterInformation {
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--The label of this parameter information.
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--
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--Either a string or an inclusive start and exclusive end offsets within its containing
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--signature label. (see SignatureInformation.label). The offsets are based on a UTF-16
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--string representation as `Position` and `Range` does.
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--
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--*Note*: a label of type string should be a substring of its containing signature label.
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--Its intended use case is to highlight the parameter label part in the `SignatureInformation.label`.
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label: string | [number, number];
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--The human-readable doc-comment of this parameter. Will be shown
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--in the UI but can be omitted.
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documentation?: string | MarkupContent;
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}
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--]=]
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-- TODO highlight parameter
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if parameter.documentation then
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util.convert_input_to_markdown_lines(parameter.documentation, contents)
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end
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end
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end
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return contents
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end
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function M.signature_help()
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local params = protocol.make_text_document_position_params()
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focusable_preview('textDocument/signatureHelp', params, function(result)
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if not (result and result.signatures and result.signatures[1]) then return end
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-- TODO show empty popup when signatures is empty?
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local lines = signature_help_to_preview_contents(result)
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lines = util.trim_empty_lines(lines)
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if vim.tbl_isempty(lines) then
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return { 'No signature available' }
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end
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return lines, util.try_trim_markdown_code_blocks(lines)
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end)
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end
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-- TODO(ashkan) ?
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function M.completion(context)
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local params = protocol.make_text_document_position_params()
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params.context = context
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return request('textDocument/completion', params, function(_, _, result)
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if vim.tbl_isempty(result or {}) then return end
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local row, col = unpack(api.nvim_win_get_cursor(0))
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local line = assert(api.nvim_buf_get_lines(0, row-1, row, false)[1])
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local line_to_cursor = line:sub(col+1)
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local matches = util.text_document_completion_list_to_complete_items(result, line_to_cursor)
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vim.fn.complete(col, matches)
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end)
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end
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function M.range_formatting()
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end
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function M.rename(new_name)
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-- TODO(ashkan) use prepareRename
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-- * result: [`Range`](#range) \| `{ range: Range, placeholder: string }` \| `null` describing the range of the string to rename and optionally a placeholder text of the string content to be renamed. If `null` is returned then it is deemed that a 'textDocument/rename' request is not valid at the given position.
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local params = protocol.make_text_document_position_params()
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new_name = new_name or npcall(vfn.input, "New Name: ")
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if not (new_name and #new_name > 0) then return end
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params.newName = new_name
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request('textDocument/rename', params, function(_, _, result)
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if not result then return end
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util.workspace_apply_workspace_edit(result)
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end)
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end
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return M
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-- vim:sw=2 ts=2 et
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