134 lines
3.5 KiB
Lua
134 lines
3.5 KiB
Lua
local ts = {}
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local queries = {
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struct = [[
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[(type_spec name: (type_identifier) @_name
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type: (struct_type))
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(var_spec name: (identifier) @_name
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type: (struct_type))
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(short_var_declaration
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left: (expression_list (identifier) @_name @_var)
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right: (expression_list (composite_literal
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type: (struct_type))))]
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]],
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func = [[
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[(function_declaration name: (identifier) @_name)
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(method_declaration name: (field_identifier) @_name)]
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]],
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package = [[
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(package_identifier) @_name
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]],
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interface = [[
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(type_spec
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name: (type_identifier) @_name
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type: (interface_type))
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]],
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}
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---@param parent_type string[]
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---@param node TSNode
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---@return TSNode?
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local function get_parrent_node(parent_type, node)
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---@type TSNode?
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local current = node
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while current do
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if vim.tbl_contains(parent_type, current:type()) then
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break
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end
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current = current:parent()
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if current == nil then
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return nil
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end
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end
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return current
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end
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---@param query vim.treesitter.Query
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---@param node TSNode
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---@param bufnr integer
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---@return {name:string}
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local function get_captures(query, node, bufnr)
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local res = {}
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for _, match, _ in query:iter_matches(node, bufnr) do
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for capture_id, captured_node in pairs(match) do
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local capture_name = query.captures[capture_id]
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if capture_name == "_name" then
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res["name"] = vim.treesitter.get_node_text(captured_node, bufnr)
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end
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if capture_name == "_var" then
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res["is_varstruct"] = true
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end
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end
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end
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return res
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end
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---@class gopher.TsResult
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---@field name string
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---@field start_line integer
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---@field end_line integer
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---@field is_varstruct boolean
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---@param bufnr integer
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---@param parent_type string[]
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---@param query string
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---@return gopher.TsResult
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local function do_stuff(bufnr, parent_type, query)
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local node = vim.treesitter.get_node {
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bufnr = bufnr,
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}
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if not node then
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error "No nodes found under cursor"
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end
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local parent_node = get_parrent_node(parent_type, node)
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if not parent_node then
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error "No parent node found under cursor"
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end
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local q = vim.treesitter.query.parse("go", query)
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local res = get_captures(q, parent_node, bufnr)
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assert(res.name ~= nil, "No capture name found")
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local start_row, _, end_row, _ = parent_node:range()
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res["start_line"] = start_row + 1
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res["end_line"] = end_row + 1
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return res
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end
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---@param bufnr integer
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function ts.get_struct_under_cursor(bufnr)
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--- should be both type_spec and type_declaration
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--- because in cases like `type ( T struct{}, U strict{} )`
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--- i will be choosing always last struct in the list
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---
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--- var_spec is for cases like `var x struct{}`
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--- short_var_declaration is for cases like `x := struct{}{}`
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return do_stuff(bufnr, {
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"type_spec",
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"type_declaration",
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"var_spec",
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"short_var_declaration",
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}, queries.struct)
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end
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---@param bufnr integer
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function ts.get_func_under_cursor(bufnr)
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--- since this handles both and funcs and methods we should check for both parent nodes
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return do_stuff(bufnr, { "function_declaration", "method_declaration" }, queries.func)
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end
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---@param bufnr integer
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function ts.get_package_under_cursor(bufnr)
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return do_stuff(bufnr, { "package_clause" }, queries.package)
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end
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---@param bufnr integer
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function ts.get_interface_under_cursor(bufnr)
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return do_stuff(bufnr, { "type_declaration" }, queries.interface)
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end
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return ts
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