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-- This module highlights reference usages and the corresponding
-- definition on cursor hold.
local parsers = require'nvim-treesitter.parsers'
local ts_utils = require'nvim-treesitter.ts_utils'
local locals = require'nvim-treesitter.locals'
local api = vim.api
local cmd = api.nvim_command
local M = {}
local usage_namespace = api.nvim_create_namespace('nvim-treesitter-usages')
function M.highlight_usages(bufnr)
M.clear_usage_highlights(bufnr)
local node_at_point = ts_utils.get_node_at_cursor()
local references = locals.get_references(bufnr)
if not node_at_point or not vim.tbl_contains(references, node_at_point) then
return
end
local def_node, scope = ts_utils.find_definition(node_at_point, bufnr)
local usages = ts_utils.find_usages(node_at_point, scope)
for _, usage_node in ipairs(usages) do
local start_row, start_col, _, end_col = usage_node:range()
if usage_node ~= node_at_point then
api.nvim_buf_add_highlight(
bufnr,
usage_namespace,
'TSDefinitionUsage',
start_row,
start_col,
end_col)
end
end
if def_node ~= node_at_point then
local start_row, start_col, _, end_col = def_node:range()
api.nvim_buf_add_highlight(
bufnr,
usage_namespace,
'TSDefinition',
start_row,
start_col,
end_col)
end
end
function M.clear_usage_highlights(bufnr)
api.nvim_buf_clear_namespace(bufnr, usage_namespace, 0, -1)
end
function M.attach(bufnr)
local bufnr = bufnr or api.nvim_get_current_buf()
cmd(string.format('augroup NvimTreesitterUsages_%d', bufnr))
cmd 'au!'
cmd(string.format([[autocmd CursorHold <buffer=%d> lua require'nvim-treesitter.refactor.highlight_definitions'.highlight_usages(%d)]], bufnr, bufnr))
cmd(string.format([[autocmd CursorMoved <buffer=%d> lua require'nvim-treesitter.refactor.highlight_definitions'.clear_usage_highlights(%d)]], bufnr, bufnr))
cmd(string.format([[autocmd InsertEnter <buffer=%d> lua require'nvim-treesitter.refactor.highlight_definitions'.clear_usage_highlights(%d)]], bufnr, bufnr))
cmd 'augroup END'
end
function M.detach(bufnr)
M.clear_usage_highlights(bufnr)
cmd(string.format('autocmd! NvimTreesitterUsages_%d CursorHold', bufnr))
cmd(string.format('autocmd! NvimTreesitterUsages_%d CursorMoved', bufnr))
cmd(string.format('autocmd! NvimTreesitterUsages_%d InsertEnter', bufnr))
end
return M
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