diff options
Diffstat (limited to 'runtime/lua/vim/lsp')
| -rw-r--r-- | runtime/lua/vim/lsp/buf.lua | 17 | ||||
| -rw-r--r-- | runtime/lua/vim/lsp/diagnostic.lua | 25 | ||||
| -rw-r--r-- | runtime/lua/vim/lsp/handlers.lua | 3 | ||||
| -rw-r--r-- | runtime/lua/vim/lsp/log.lua | 1 | ||||
| -rw-r--r-- | runtime/lua/vim/lsp/rpc.lua | 13 | ||||
| -rw-r--r-- | runtime/lua/vim/lsp/sync.lua | 5 | ||||
| -rw-r--r-- | runtime/lua/vim/lsp/util.lua | 258 |
7 files changed, 159 insertions, 163 deletions
diff --git a/runtime/lua/vim/lsp/buf.lua b/runtime/lua/vim/lsp/buf.lua index d3ba766d89..f02ebfb9dc 100644 --- a/runtime/lua/vim/lsp/buf.lua +++ b/runtime/lua/vim/lsp/buf.lua @@ -165,7 +165,7 @@ end --- saved. {timeout_ms} is passed on to |vim.lsp.buf_request_sync()|. Example: --- --- <pre> ---- vim.api.nvim_command[[autocmd BufWritePre <buffer> lua vim.lsp.buf.formatting_sync()]] +--- autocmd BufWritePre <buffer> lua vim.lsp.buf.formatting_sync() --- </pre> --- ---@param options Table with valid `FormattingOptions` entries @@ -176,9 +176,10 @@ function M.formatting_sync(options, timeout_ms) if client == nil then return end local params = util.make_formatting_params(options) - local result, err = client.request_sync("textDocument/formatting", params, timeout_ms, vim.api.nvim_get_current_buf()) + local bufnr = vim.api.nvim_get_current_buf() + local result, err = client.request_sync("textDocument/formatting", params, timeout_ms, bufnr) if result and result.result then - util.apply_text_edits(result.result) + util.apply_text_edits(result.result, bufnr) elseif err then vim.notify("vim.lsp.buf.formatting_sync: " .. err, vim.log.levels.WARN) end @@ -202,6 +203,7 @@ end ---the remaining clients in the order as they occur in the `order` list. function M.formatting_seq_sync(options, timeout_ms, order) local clients = vim.tbl_values(vim.lsp.buf_get_clients()); + local bufnr = vim.api.nvim_get_current_buf() -- sort the clients according to `order` for _, client_name in pairs(order or {}) do @@ -220,7 +222,7 @@ function M.formatting_seq_sync(options, timeout_ms, order) local params = util.make_formatting_params(options) local result, err = client.request_sync("textDocument/formatting", params, timeout_ms, vim.api.nvim_get_current_buf()) if result and result.result then - util.apply_text_edits(result.result) + util.apply_text_edits(result.result, bufnr) elseif err then vim.notify(string.format("vim.lsp.buf.formatting_seq_sync: (%s) %s", client.name, err), vim.log.levels.WARN) end @@ -261,6 +263,7 @@ function M.rename(new_name) request('textDocument/rename', params) end + ---@private local function prepare_rename(err, result) if err == nil and result == nil then vim.notify('nothing to rename', vim.log.levels.INFO) @@ -444,9 +447,9 @@ end --- by events such as `CursorHold`, eg: --- --- <pre> ---- vim.api.nvim_command [[autocmd CursorHold <buffer> lua vim.lsp.buf.document_highlight()]] ---- vim.api.nvim_command [[autocmd CursorHoldI <buffer> lua vim.lsp.buf.document_highlight()]] ---- vim.api.nvim_command [[autocmd CursorMoved <buffer> lua vim.lsp.buf.clear_references()]] +--- autocmd CursorHold <buffer> lua vim.lsp.buf.document_highlight() +--- autocmd CursorHoldI <buffer> lua vim.lsp.buf.document_highlight() +--- autocmd CursorMoved <buffer> lua vim.lsp.buf.clear_references() --- </pre> --- --- Note: Usage of |vim.lsp.buf.document_highlight()| requires the following highlight groups diff --git a/runtime/lua/vim/lsp/diagnostic.lua b/runtime/lua/vim/lsp/diagnostic.lua index 76a4dc30b7..075da41b23 100644 --- a/runtime/lua/vim/lsp/diagnostic.lua +++ b/runtime/lua/vim/lsp/diagnostic.lua @@ -220,12 +220,9 @@ function M.on_publish_diagnostics(_, result, ctx, config) end vim.diagnostic.set(namespace, bufnr, diagnostic_lsp_to_vim(diagnostics, bufnr, client_id)) - - -- Keep old autocmd for back compat. This should eventually be removed. - vim.api.nvim_command("doautocmd <nomodeline> User LspDiagnosticsChanged") end ---- Clear diagnotics and diagnostic cache. +--- Clear diagnostics and diagnostic cache. --- --- Diagnostic producers should prefer |vim.diagnostic.reset()|. However, --- this method signature is still used internally in some parts of the LSP @@ -434,24 +431,6 @@ end --- Move to the next diagnostic --- ---@deprecated Prefer |vim.diagnostic.goto_next()| ---- ----@param opts table|nil Configuration table. Keys: ---- - {client_id}: (number) ---- - If nil, will consider all clients attached to buffer. ---- - {cursor_position}: (Position, default current position) ---- - See |nvim_win_get_cursor()| ---- - {wrap}: (boolean, default true) ---- - Whether to loop around file or not. Similar to 'wrapscan' ---- - {severity}: (DiagnosticSeverity) ---- - Exclusive severity to consider. Overrides {severity_limit} ---- - {severity_limit}: (DiagnosticSeverity) ---- - Limit severity of diagnostics found. E.g. "Warning" means { "Error", "Warning" } will be valid. ---- - {enable_popup}: (boolean, default true) ---- - Call |vim.lsp.diagnostic.show_line_diagnostics()| on jump ---- - {popup_opts}: (table) ---- - Table to pass as {opts} parameter to |vim.lsp.diagnostic.show_line_diagnostics()| ---- - {win_id}: (number, default 0) ---- - Window ID function M.goto_next(opts) if opts then if opts.severity then @@ -565,7 +544,7 @@ end --- Open a floating window with the diagnostics from {line_nr} --- ----@deprecated Prefer |vim.diagnostic.show_line_diagnostics()| +---@deprecated Prefer |vim.diagnostic.open_float()| --- ---@param opts table Configuration table --- - all opts for |vim.lsp.diagnostic.get_line_diagnostics()| and diff --git a/runtime/lua/vim/lsp/handlers.lua b/runtime/lua/vim/lsp/handlers.lua index fa4f2b22a5..22089aaaa6 100644 --- a/runtime/lua/vim/lsp/handlers.lua +++ b/runtime/lua/vim/lsp/handlers.lua @@ -28,7 +28,7 @@ local function progress_handler(_, result, ctx, _) local client_name = client and client.name or string.format("id=%d", client_id) if not client then err_message("LSP[", client_name, "] client has shut down after sending the message") - return + return vim.NIL end local val = result.value -- unspecified yet local token = result.token -- string or number @@ -70,6 +70,7 @@ M['window/workDoneProgress/create'] = function(_, result, ctx) local client_name = client and client.name or string.format("id=%d", client_id) if not client then err_message("LSP[", client_name, "] client has shut down after sending the message") + return vim.NIL end client.messages.progress[token] = {} return vim.NIL diff --git a/runtime/lua/vim/lsp/log.lua b/runtime/lua/vim/lsp/log.lua index 4597f1919a..dbc473b52c 100644 --- a/runtime/lua/vim/lsp/log.lua +++ b/runtime/lua/vim/lsp/log.lua @@ -101,6 +101,7 @@ function log.set_level(level) end --- Gets the current log level. +---@return string current log level function log.get_level() return current_log_level end diff --git a/runtime/lua/vim/lsp/rpc.lua b/runtime/lua/vim/lsp/rpc.lua index bce1e9f35d..1fb75ddeb7 100644 --- a/runtime/lua/vim/lsp/rpc.lua +++ b/runtime/lua/vim/lsp/rpc.lua @@ -230,7 +230,7 @@ function default_dispatchers.on_error(code, err) end --- Starts an LSP server process and create an LSP RPC client object to ---- interact with it. +--- interact with it. Communication with the server is currently limited to stdio. --- ---@param cmd (string) Command to start the LSP server. ---@param cmd_args (table) List of additional string arguments to pass to {cmd}. @@ -264,8 +264,6 @@ local function start(cmd, cmd_args, dispatchers, extra_spawn_params) if extra_spawn_params and extra_spawn_params.cwd then assert(is_dir(extra_spawn_params.cwd), "cwd must be a directory") - elseif not (vim.fn.executable(cmd) == 1) then - error(string.format("The given command %q is not executable.", cmd)) end if dispatchers then local user_dispatchers = dispatchers @@ -325,7 +323,14 @@ local function start(cmd, cmd_args, dispatchers, extra_spawn_params) end handle, pid = uv.spawn(cmd, spawn_params, onexit) if handle == nil then - error(string.format("start `%s` failed: %s", cmd, pid)) + local msg = string.format("Spawning language server with cmd: `%s` failed", cmd) + if string.match(pid, "ENOENT") then + msg = msg .. ". The language server is either not installed, missing from PATH, or not executable." + else + msg = msg .. string.format(" with error message: %s", pid) + end + vim.notify(msg, vim.log.levels.WARN) + return end end diff --git a/runtime/lua/vim/lsp/sync.lua b/runtime/lua/vim/lsp/sync.lua index f185e3973f..5df2a4d144 100644 --- a/runtime/lua/vim/lsp/sync.lua +++ b/runtime/lua/vim/lsp/sync.lua @@ -74,6 +74,7 @@ local function byte_to_utf(line, byte, offset_encoding) return utf_idx + 1 end +---@private local function compute_line_length(line, offset_encoding) local length local _ @@ -133,7 +134,7 @@ local function compute_start_range(prev_lines, curr_lines, firstline, lastline, -- occur on a new line pointed to by lastline. This occurs during insertion of -- new lines(O), the new newline is inserted at the line indicated by -- new_lastline. - -- If firstline == new_lastline, the first change occured on a line that was deleted. + -- If firstline == new_lastline, the first change occurred on a line that was deleted. -- In this case, the first byte change is also at the first byte of firstline if firstline == new_lastline or firstline == lastline then return { line_idx = firstline, byte_idx = 1, char_idx = 1 } @@ -187,7 +188,7 @@ end ---@param offset_encoding string ---@returns (int, int) end_line_idx and end_col_idx of range local function compute_end_range(prev_lines, curr_lines, start_range, firstline, lastline, new_lastline, offset_encoding) - -- If firstline == new_lastline, the first change occured on a line that was deleted. + -- If firstline == new_lastline, the first change occurred on a line that was deleted. -- In this case, the last_byte... if firstline == new_lastline then return { line_idx = (lastline - new_lastline + firstline), byte_idx = 1, char_idx = 1 }, { line_idx = firstline, byte_idx = 1, char_idx = 1 } diff --git a/runtime/lua/vim/lsp/util.lua b/runtime/lua/vim/lsp/util.lua index ba5c20ef9f..fad2b962b5 100644 --- a/runtime/lua/vim/lsp/util.lua +++ b/runtime/lua/vim/lsp/util.lua @@ -148,6 +148,93 @@ local function sort_by_key(fn) end ---@private +--- Gets the zero-indexed lines from the given buffer. +--- Works on unloaded buffers by reading the file using libuv to bypass buf reading events. +--- Falls back to loading the buffer and nvim_buf_get_lines for buffers with non-file URI. +--- +---@param bufnr number bufnr to get the lines from +---@param rows number[] zero-indexed line numbers +---@return table<number string> a table mapping rows to lines +local function get_lines(bufnr, rows) + rows = type(rows) == "table" and rows or { rows } + + ---@private + local function buf_lines() + local lines = {} + for _, row in pairs(rows) do + lines[row] = (vim.api.nvim_buf_get_lines(bufnr, row, row + 1, false) or { "" })[1] + end + return lines + end + + local uri = vim.uri_from_bufnr(bufnr) + + -- load the buffer if this is not a file uri + -- Custom language server protocol extensions can result in servers sending URIs with custom schemes. Plugins are able to load these via `BufReadCmd` autocmds. + if uri:sub(1, 4) ~= "file" then + vim.fn.bufload(bufnr) + return buf_lines() + end + + -- use loaded buffers if available + if vim.fn.bufloaded(bufnr) == 1 then + return buf_lines() + end + + local filename = api.nvim_buf_get_name(bufnr) + + -- get the data from the file + local fd = uv.fs_open(filename, "r", 438) + if not fd then return "" end + local stat = uv.fs_fstat(fd) + local data = uv.fs_read(fd, stat.size, 0) + uv.fs_close(fd) + + local lines = {} -- rows we need to retrieve + local need = 0 -- keep track of how many unique rows we need + for _, row in pairs(rows) do + if not lines[row] then + need = need + 1 + end + lines[row] = true + end + + local found = 0 + local lnum = 0 + + for line in string.gmatch(data, "([^\n]*)\n?") do + if lines[lnum] == true then + lines[lnum] = line + found = found + 1 + if found == need then break end + end + lnum = lnum + 1 + end + + -- change any lines we didn't find to the empty string + for i, line in pairs(lines) do + if line == true then + lines[i] = "" + end + end + return lines +end + + +---@private +--- Gets the zero-indexed line from the given buffer. +--- Works on unloaded buffers by reading the file using libuv to bypass buf reading events. +--- Falls back to loading the buffer and nvim_buf_get_lines for buffers with non-file URI. +--- +---@param bufnr number +---@param row number zero-indexed line number +---@return string the line at row in filename +local function get_line(bufnr, row) + return get_lines(bufnr, { row })[row] +end + + +---@private --- Position is a https://microsoft.github.io/language-server-protocol/specifications/specification-current/#position --- Returns a zero-indexed column, since set_lines() does the conversion to --- 1-indexed @@ -158,31 +245,25 @@ local function get_line_byte_from_position(bufnr, position, offset_encoding) -- When on the first character, we can ignore the difference between byte and -- character if col > 0 then - if not api.nvim_buf_is_loaded(bufnr) then - vim.fn.bufload(bufnr) - end + local line = get_line(bufnr, position.line) + local ok, result - local line = position.line - local lines = api.nvim_buf_get_lines(bufnr, line, line + 1, false) - if #lines > 0 then - local ok, result - - if offset_encoding == "utf-16" or not offset_encoding then - ok, result = pcall(vim.str_byteindex, lines[1], col, true) - elseif offset_encoding == "utf-32" then - ok, result = pcall(vim.str_byteindex, lines[1], col, false) - end + if offset_encoding == "utf-16" or not offset_encoding then + ok, result = pcall(vim.str_byteindex, line, col, true) + elseif offset_encoding == "utf-32" then + ok, result = pcall(vim.str_byteindex, line, col, false) + end - if ok then - return result - end - return math.min(#lines[1], col) + if ok then + return result end + return math.min(#line, col) end return col end --- Process and return progress reports from lsp server +---@private function M.get_progress_messages() local new_messages = {} @@ -246,6 +327,10 @@ end ---@param bufnr number Buffer id ---@see https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textEdit function M.apply_text_edits(text_edits, bufnr) + validate { + text_edits = { text_edits, 't', false }; + bufnr = { bufnr, 'number', false }; + } if not next(text_edits) then return end if not api.nvim_buf_is_loaded(bufnr) then vim.fn.bufload(bufnr) @@ -474,7 +559,7 @@ local function remove_unmatch_completion_items(items, prefix) end, items) end ---- Acording to LSP spec, if the client set `completionItemKind.valueSet`, +--- According to LSP spec, if the client set `completionItemKind.valueSet`, --- the client must handle it properly even if it receives a value outside the --- specification. --- @@ -574,7 +659,7 @@ function M.rename(old_fname, new_fname, opts) api.nvim_buf_delete(oldbuf, { force = true }) end - +---@private local function create_file(change) local opts = change.options or {} -- from spec: Overwrite wins over `ignoreIfExists` @@ -586,7 +671,7 @@ local function create_file(change) vim.fn.bufadd(fname) end - +---@private local function delete_file(change) local opts = change.options or {} local fname = vim.uri_to_fname(change.uri) @@ -1054,7 +1139,7 @@ function M.stylize_markdown(bufnr, contents, opts) markdown_lines[#stripped] = true end else - -- strip any emty lines or separators prior to this separator in actual markdown + -- strip any empty lines or separators prior to this separator in actual markdown if line:match("^---+$") then while markdown_lines[#stripped] and (stripped[#stripped]:match("^%s*$") or stripped[#stripped]:match("^---+$")) do markdown_lines[#stripped] = false @@ -1087,7 +1172,7 @@ function M.stylize_markdown(bufnr, contents, opts) local idx = 1 ---@private - -- keep track of syntaxes we already inlcuded. + -- keep track of syntaxes we already included. -- no need to include the same syntax more than once local langs = {} local fences = get_markdown_fences() @@ -1223,18 +1308,21 @@ end --- ---@param contents table of lines to show in window ---@param syntax string of syntax to set for opened buffer ----@param opts dictionary with optional fields ---- - height of floating window ---- - width of floating window ---- - wrap boolean enable wrapping of long lines (defaults to true) ---- - wrap_at character to wrap at for computing height when wrap is enabled ---- - max_width maximal width of floating window ---- - max_height maximal height of floating window ---- - pad_top number of lines to pad contents at top ---- - pad_bottom number of lines to pad contents at bottom ---- - focus_id if a popup with this id is opened, then focus it ---- - close_events list of events that closes the floating window ---- - focusable (boolean, default true): Make float focusable +---@param opts table with optional fields (additional keys are passed on to |vim.api.nvim_open_win()|) +--- - height: (number) height of floating window +--- - width: (number) width of floating window +--- - wrap: (boolean, default true) wrap long lines +--- - wrap_at: (string) character to wrap at for computing height when wrap is enabled +--- - max_width: (number) maximal width of floating window +--- - max_height: (number) maximal height of floating window +--- - pad_top: (number) number of lines to pad contents at top +--- - pad_bottom: (number) number of lines to pad contents at bottom +--- - focus_id: (string) if a popup with this id is opened, then focus it +--- - close_events: (table) list of events that closes the floating window +--- - focusable: (boolean, default true) Make float focusable +--- - focus: (boolean, default true) If `true`, and if {focusable} +--- is also `true`, focus an existing floating window with the same +--- {focus_id} ---@returns bufnr,winnr buffer and window number of the newly created floating ---preview window function M.open_floating_preview(contents, syntax, opts) @@ -1246,12 +1334,13 @@ function M.open_floating_preview(contents, syntax, opts) opts = opts or {} opts.wrap = opts.wrap ~= false -- wrapping by default opts.stylize_markdown = opts.stylize_markdown ~= false + opts.focus = opts.focus ~= false opts.close_events = opts.close_events or {"CursorMoved", "CursorMovedI", "BufHidden", "InsertCharPre"} local bufnr = api.nvim_get_current_buf() -- check if this popup is focusable and we need to focus - if opts.focus_id and opts.focusable ~= false then + if opts.focus_id and opts.focusable ~= false and opts.focus then -- Go back to previous window if we are in a focusable one local current_winnr = api.nvim_get_current_win() if npcall(api.nvim_win_get_var, current_winnr, opts.focus_id) then @@ -1314,7 +1403,7 @@ function M.open_floating_preview(contents, syntax, opts) api.nvim_buf_set_option(floating_bufnr, 'modifiable', false) api.nvim_buf_set_option(floating_bufnr, 'bufhidden', 'wipe') - api.nvim_buf_set_keymap(floating_bufnr, "n", "q", "<cmd>bdelete<cr>", {silent = true, noremap = true}) + api.nvim_buf_set_keymap(floating_bufnr, "n", "q", "<cmd>bdelete<cr>", {silent = true, noremap = true, nowait = true}) M.close_preview_autocmd(opts.close_events, floating_winnr) -- save focus_id @@ -1331,7 +1420,7 @@ do --[[ References ]] --- Removes document highlights from a buffer. --- - ---@param bufnr buffer id + ---@param bufnr number Buffer id function M.buf_clear_references(bufnr) validate { bufnr = {bufnr, 'n', true} } api.nvim_buf_clear_namespace(bufnr, reference_ns, 0, -1) @@ -1339,9 +1428,9 @@ do --[[ References ]] --- Shows a list of document highlights for a certain buffer. --- - ---@param bufnr buffer id - ---@param references List of `DocumentHighlight` objects to highlight - ---@param offset_encoding string utf-8|utf-16|utf-32|nil defaults to utf-16 + ---@param bufnr number Buffer id + ---@param references table List of `DocumentHighlight` objects to highlight + ---@param offset_encoding string One of "utf-8", "utf-16", "utf-32", or nil. Defaults to utf-16 ---@see https://microsoft.github.io/language-server-protocol/specifications/specification-3-17/#documentHighlight function M.buf_highlight_references(bufnr, references, offset_encoding) validate { bufnr = {bufnr, 'n', true} } @@ -1372,88 +1461,6 @@ local position_sort = sort_by_key(function(v) return {v.start.line, v.start.character} end) ---- Gets the zero-indexed line from the given uri. ----@param uri string uri of the resource to get the line from ----@param row number zero-indexed line number ----@return string the line at row in filename --- For non-file uris, we load the buffer and get the line. --- If a loaded buffer exists, then that is used. --- Otherwise we get the line using libuv which is a lot faster than loading the buffer. -function M.get_line(uri, row) - return M.get_lines(uri, { row })[row] -end - ---- Gets the zero-indexed lines from the given uri. ----@param uri string uri of the resource to get the lines from ----@param rows number[] zero-indexed line numbers ----@return table<number string> a table mapping rows to lines --- For non-file uris, we load the buffer and get the lines. --- If a loaded buffer exists, then that is used. --- Otherwise we get the lines using libuv which is a lot faster than loading the buffer. -function M.get_lines(uri, rows) - rows = type(rows) == "table" and rows or { rows } - - local function buf_lines(bufnr) - local lines = {} - for _, row in pairs(rows) do - lines[row] = (vim.api.nvim_buf_get_lines(bufnr, row, row + 1, false) or { "" })[1] - end - return lines - end - - -- load the buffer if this is not a file uri - -- Custom language server protocol extensions can result in servers sending URIs with custom schemes. Plugins are able to load these via `BufReadCmd` autocmds. - if uri:sub(1, 4) ~= "file" then - local bufnr = vim.uri_to_bufnr(uri) - vim.fn.bufload(bufnr) - return buf_lines(bufnr) - end - - local filename = vim.uri_to_fname(uri) - - -- use loaded buffers if available - if vim.fn.bufloaded(filename) == 1 then - local bufnr = vim.fn.bufnr(filename, false) - return buf_lines(bufnr) - end - - -- get the data from the file - local fd = uv.fs_open(filename, "r", 438) - if not fd then return "" end - local stat = uv.fs_fstat(fd) - local data = uv.fs_read(fd, stat.size, 0) - uv.fs_close(fd) - - local lines = {} -- rows we need to retrieve - local need = 0 -- keep track of how many unique rows we need - for _, row in pairs(rows) do - if not lines[row] then - need = need + 1 - end - lines[row] = true - end - - local found = 0 - local lnum = 0 - - for line in string.gmatch(data, "([^\n]*)\n?") do - if lines[lnum] == true then - lines[lnum] = line - found = found + 1 - if found == need then break end - end - lnum = lnum + 1 - end - - -- change any lines we didn't find to the empty string - for i, line in pairs(lines) do - if line == true then - lines[i] = "" - end - end - return lines -end - --- Returns the items with the byte position calculated correctly and in sorted --- order, for display in quickfix and location lists. --- @@ -1496,7 +1503,7 @@ function M.locations_to_items(locations) end -- get all the lines for this uri - local lines = M.get_lines(uri, uri_rows) + local lines = get_lines(vim.uri_to_bufnr(uri), uri_rows) for _, temp in ipairs(rows) do local pos = temp.start @@ -1541,7 +1548,7 @@ function M.set_qflist(items) }) end --- Acording to LSP spec, if the client set "symbolKind.valueSet", +-- According to LSP spec, if the client set "symbolKind.valueSet", -- the client must handle it properly even if it receives a value outside the specification. -- https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_documentSymbol function M._get_symbol_kind_name(symbol_kind) @@ -1773,8 +1780,7 @@ end ---@param col 0-indexed byte offset in line ---@returns (number, number) UTF-32 and UTF-16 index of the character in line {row} column {col} in buffer {buf} function M.character_offset(bufnr, row, col) - local uri = vim.uri_from_bufnr(bufnr) - local line = M.get_line(uri, row) + local line = get_line(bufnr, row) -- If the col is past the EOL, use the line length. if col > #line then return str_utfindex(line) |