78 lines
2.0 KiB
Lua
78 lines
2.0 KiB
Lua
local ts = vim.treesitter
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local query = ts.parse_query("c", [[
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(preproc_function_def value: (preproc_arg) @macro_def)
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(preproc_def value: (preproc_arg) @macro_def)
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]])
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local function get_ast_root(bufnr)
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local tree = ts.get_parser(bufnr, "c"):parse()
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return tree[1]:root()
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end
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local capture_lookup = {}
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for id, name in ipairs(query.captures) do
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capture_lookup[name] = id
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end
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local function format_macros()
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local bufnr = vim.api.nvim_get_current_buf()
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local winnr = vim.api.nvim_get_current_win()
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for _, match in query:iter_matches(get_ast_root(bufnr), bufnr, 0, -1) do
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local macro_def_node = match[capture_lookup.macro_def]
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-- local class_name = ts.get_node_text(class_node, bufnr)
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local start_line = macro_def_node:start()
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local end_line = macro_def_node:end_()
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local lines = vim.api.nvim_buf_get_lines(bufnr, start_line, end_line+1, false)
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local tabstop = tonumber(vim.bo[bufnr].tabstop) or 8
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if #lines > 2 then
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for i, line in ipairs(lines) do
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lines[i] = line:match("^(.-)%s*[\\]?$")
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end
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local line_length = 0
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do
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local textwidth = vim.bo[bufnr].textwidth
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if textwidth and textwidth ~= "" then
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line_length = tonumber(textwidth)
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end
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if line_length <= 0 then
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local colorcolum = vim.wo[winnr].colorcolumn
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if colorcolum and colorcolum ~= "" then
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line_length = tonumber(colorcolum)
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end
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end
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if line_length <= 0 then
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for _, line in ipairs(lines) do
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line_length = math.max(line_length, #line+2)
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end
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end
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end
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for i = 1, #lines-1 do
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local line = lines[i]
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local length = #(line:gsub("\t", (" "):rep(tabstop)))
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lines[i] = line .. (" "):rep(line_length - length-2) .. " \\"
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end
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vim.api.nvim_buf_set_lines(bufnr, start_line, end_line+1, false, lines)
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end
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end
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end
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local group = vim.api.nvim_create_augroup("UpdateCMacro", { clear = true })
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for _, cmd in ipairs{"InsertLeavePre", "BufWritePre"} do
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vim.api.nvim_create_autocmd(cmd, {
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group = group,
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pattern = {"*.c", "*.h", "*.cpp", "*.hpp", "*.cc"},
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callback = function (data)
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format_macros()
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end
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})
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end
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