mirror of
https://github.com/neovim/neovim.git
synced 2024-12-21 03:35:02 -07:00
145 lines
3.4 KiB
Lua
145 lines
3.4 KiB
Lua
local a = vim.api
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local query = require('vim.treesitter.query')
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local language = require('vim.treesitter.language')
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local LanguageTree = require('vim.treesitter.languagetree')
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-- TODO(bfredl): currently we retain parsers for the lifetime of the buffer.
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-- Consider use weak references to release parser if all plugins are done with
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-- it.
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local parsers = {}
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local M = vim.tbl_extend('error', query, language)
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M.language_version = vim._ts_get_language_version()
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M.minimum_language_version = vim._ts_get_minimum_language_version()
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setmetatable(M, {
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__index = function(t, k)
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if k == 'highlighter' then
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t[k] = require('vim.treesitter.highlighter')
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return t[k]
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elseif k == 'language' then
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t[k] = require('vim.treesitter.language')
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return t[k]
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elseif k == 'query' then
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t[k] = require('vim.treesitter.query')
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return t[k]
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end
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end,
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})
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--- Creates a new parser.
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---
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--- It is not recommended to use this, use vim.treesitter.get_parser() instead.
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---
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---@param bufnr The buffer the parser will be tied to
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---@param lang The language of the parser
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---@param opts Options to pass to the created language tree
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function M._create_parser(bufnr, lang, opts)
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language.require_language(lang)
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if bufnr == 0 then
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bufnr = a.nvim_get_current_buf()
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end
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vim.fn.bufload(bufnr)
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local self = LanguageTree.new(bufnr, lang, opts)
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---@private
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local function bytes_cb(_, ...)
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self:_on_bytes(...)
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end
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---@private
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local function detach_cb(_, ...)
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if parsers[bufnr] == self then
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parsers[bufnr] = nil
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end
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self:_on_detach(...)
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end
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---@private
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local function reload_cb(_, ...)
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self:_on_reload(...)
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end
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a.nvim_buf_attach(
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self:source(),
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false,
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{ on_bytes = bytes_cb, on_detach = detach_cb, on_reload = reload_cb, preview = true }
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)
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self:parse()
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return self
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end
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--- Gets the parser for this bufnr / ft combination.
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---
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--- If needed this will create the parser.
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--- Unconditionally attach the provided callback
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---
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---@param bufnr The buffer the parser should be tied to
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---@param lang The filetype of this parser
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---@param opts Options object to pass to the created language tree
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---
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---@returns The parser
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function M.get_parser(bufnr, lang, opts)
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opts = opts or {}
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if bufnr == nil or bufnr == 0 then
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bufnr = a.nvim_get_current_buf()
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end
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if lang == nil then
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lang = a.nvim_buf_get_option(bufnr, 'filetype')
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end
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if parsers[bufnr] == nil or parsers[bufnr]:lang() ~= lang then
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parsers[bufnr] = M._create_parser(bufnr, lang, opts)
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end
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parsers[bufnr]:register_cbs(opts.buf_attach_cbs)
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return parsers[bufnr]
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end
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--- Gets a string parser
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---
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---@param str The string to parse
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---@param lang The language of this string
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---@param opts Options to pass to the created language tree
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function M.get_string_parser(str, lang, opts)
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vim.validate({
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str = { str, 'string' },
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lang = { lang, 'string' },
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})
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language.require_language(lang)
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return LanguageTree.new(str, lang, opts)
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end
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--- Determines whether a node is the ancestor of another
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---
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---@param dest table the possible ancestor
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---@param source table the possible descendant node
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---
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---@returns (boolean) True if dest is an ancestor of source
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function M.is_ancestor(dest, source)
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if not (dest and source) then
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return false
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end
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local current = source
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while current ~= nil do
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if current == dest then
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return true
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end
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current = current:parent()
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end
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return false
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end
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return M
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