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local validate = vim.validate
local api = vim.api
local util = require 'vim.lsp.util'
local protocol = require 'vim.lsp.protocol'
local M = {}
local function resolve_bufnr(bufnr)
validate { bufnr = { bufnr, 'n', true } }
if bufnr == nil or bufnr == 0 then
return api.nvim_get_current_buf()
end
return bufnr
end
local function ok_or_nil(status, ...)
if not status then return end
return ...
end
local function npcall(fn, ...)
return ok_or_nil(pcall(fn, ...))
end
local function find_window_by_var(name, value)
for _, win in ipairs(api.nvim_list_wins()) do
if npcall(api.nvim_win_get_var, win, name) == value then
return win
end
end
end
local hover_window_tag = 'lsp_hover'
function M.hover(bufnr)
if npcall(api.nvim_win_get_var, 0, hover_window_tag) then
api.nvim_command("wincmd p")
return
end
bufnr = resolve_bufnr(bufnr)
do
local win = find_window_by_var(hover_window_tag, bufnr)
if win then
api.nvim_set_current_win(win)
return
end
end
local params = protocol.make_text_document_position_params()
vim.lsp.buf_request(bufnr, 'textDocument/hover', params, function(_, _, result, _)
if result == nil or vim.tbl_isempty(result) then
return
end
if result.contents ~= nil then
local markdown_lines = util.convert_input_to_markdown_lines(result.contents)
markdown_lines = util.trim_empty_lines(markdown_lines)
if vim.tbl_isempty(markdown_lines) then
markdown_lines = { 'No information available' }
end
local filetype = util.try_trim_markdown_code_blocks(markdown_lines)
local _, winnr = util.open_floating_preview(markdown_lines, filetype)
api.nvim_win_set_var(winnr, hover_window_tag, bufnr)
end
end)
end
function M.signature_help()
end
function M.declaration()
end
function M.type_definition()
end
function M.implementation()
end
-- TODO(ashkan) ?
function M.completion()
end
function M.range_formatting()
end
return M
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