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local api = vim.api
local ts = vim.treesitter
local configs = require "nvim-treesitter.configs"
local parsers = require "nvim-treesitter.parsers"
local queries = require'nvim-treesitter.query'
local ts_utils = require'nvim-treesitter.ts_utils'
local M = {}
function M.select_textobject(query_string)
local bufnr = vim.api.nvim_get_current_buf()
local lang = parsers.get_buf_lang(bufnr)
if not lang then return end
local row, col = unpack(vim.api.nvim_win_get_cursor(0))
row = row - 1
local matches = {}
if string.match(query_string, '^@.*') then
matches = queries.get_capture_matches(bufnr, query_string, 'textobjects')
else
local parser = parsers.get_parser(bufnr, lang)
local root = parser:parse():root()
local start_row, _, end_row, _ = root:range()
local query = ts.parse_query(lang, query_string)
for m in queries.iter_prepared_matches(query, root, bufnr, start_row, end_row) do
for _, n in pairs(m) do
if n.node then
table.insert(matches, n)
end
end
end
end
local match_length
local smallest_range
local earliest_start
for _, m in pairs(matches) do
if m.node and ts_utils.is_in_node_range(m.node, row, col) then
local length = ts_utils.node_length(m.node)
if not match_length or length < match_length then
smallest_range = m
match_length = length
end
-- for nodes with same length take the one with earliest start
if match_length and length == smallest_range then
local start = m.start
if start then
local _, _, start_byte = m.start.node:start()
if not earliest_start or start_byte < earliest_start then
smallest_range = m
match_length = length
earliest_start = start_byte
end
end
end
end
end
if smallest_range then
if smallest_range.start then
local start_range = {smallest_range.start.node:range()}
local node_range = {smallest_range.node:range()}
ts_utils.update_selection(bufnr, {start_range[1], start_range[2], node_range[3], node_range[4]})
else
ts_utils.update_selection(bufnr, smallest_range.node)
end
end
end
function M.attach(bufnr, lang)
local buf = bufnr or api.nvim_get_current_buf()
local config = configs.get_module("textobjects")
local lang = lang or parsers.get_buf_lang(buf)
for mapping, query in pairs(config.keymaps) do
if type(query) == 'table' then
query = query[lang]
elseif not queries.get_query(lang, 'textobjects') then
query = nil
end
if query then
local cmd = ":lua require'nvim-treesitter.textobjects'.select_textobject('"..query.."')<CR>"
api.nvim_buf_set_keymap(buf, "o", mapping, cmd, {silent = true})
api.nvim_buf_set_keymap(buf, "v", mapping, cmd, {silent = true})
end
end
end
function M.detach(bufnr)
local buf = bufnr or api.nvim_get_current_buf()
local config = configs.get_module("textobjects")
local lang = parsers.get_buf_lang(bufnr)
for mapping, query in pairs(config.keymaps) do
if type(query) == 'table' then
query = query[lang]
elseif not queries.get_query(lang, 'textobjects') then
query = nil
end
if query then
api.nvim_buf_del_keymap(buf, "o", mapping)
api.nvim_buf_del_keymap(buf, "v", mapping)
end
end
end
return M
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