mirror of
https://github.com/denoland/deno.git
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1233 lines
32 KiB
JavaScript
1233 lines
32 KiB
JavaScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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// TODO(petamoriken): enable prefer-primordials for node polyfills
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// deno-lint-ignore-file prefer-primordials
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// deno-lint-ignore-file camelcase no-inner-declarations no-this-alias
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import {
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ERR_INVALID_ARG_VALUE,
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ERR_USE_AFTER_CLOSE,
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} from "ext:deno_node/internal/errors.ts";
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import {
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validateAbortSignal,
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validateArray,
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validateString,
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validateUint32,
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} from "ext:deno_node/internal/validators.mjs";
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import {
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// inspect,
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getStringWidth,
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stripVTControlCharacters,
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} from "ext:deno_node/internal/util/inspect.mjs";
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import EventEmitter from "node:events";
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import { emitKeypressEvents } from "ext:deno_node/internal/readline/emitKeypressEvents.mjs";
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import {
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charLengthAt,
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charLengthLeft,
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commonPrefix,
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kSubstringSearch,
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} from "ext:deno_node/internal/readline/utils.mjs";
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import {
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clearScreenDown,
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cursorTo,
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moveCursor,
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} from "ext:deno_node/internal/readline/callbacks.mjs";
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import { Readable } from "ext:deno_node/_stream.mjs";
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import process from "node:process";
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import { StringDecoder } from "node:string_decoder";
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import {
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kAddHistory,
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kDecoder,
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kDeleteLeft,
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kDeleteLineLeft,
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kDeleteLineRight,
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kDeleteRight,
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kDeleteWordLeft,
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kDeleteWordRight,
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kGetDisplayPos,
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kHistoryNext,
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kHistoryPrev,
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kInsertString,
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kLine,
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kLine_buffer,
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kMoveCursor,
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kNormalWrite,
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kOldPrompt,
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kOnLine,
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kPreviousKey,
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kPrompt,
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kQuestionCallback,
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kRefreshLine,
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kSawKeyPress,
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kSawReturnAt,
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kSetRawMode,
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kTabComplete,
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kTabCompleter,
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kTtyWrite,
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kWordLeft,
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kWordRight,
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kWriteToOutput,
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} from "ext:deno_node/internal/readline/symbols.mjs";
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const kHistorySize = 30;
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const kMincrlfDelay = 100;
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// \r\n, \n, or \r followed by something other than \n
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const lineEnding = /\r?\n|\r(?!\n)/;
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const kLineObjectStream = Symbol("line object stream");
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export const kQuestionCancel = Symbol("kQuestionCancel");
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export const kQuestion = Symbol("kQuestion");
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// GNU readline library - keyseq-timeout is 500ms (default)
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const ESCAPE_CODE_TIMEOUT = 500;
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export {
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kAddHistory,
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kDecoder,
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kDeleteLeft,
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kDeleteLineLeft,
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kDeleteLineRight,
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kDeleteRight,
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kDeleteWordLeft,
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kDeleteWordRight,
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kGetDisplayPos,
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kHistoryNext,
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kHistoryPrev,
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kInsertString,
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kLine,
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kLine_buffer,
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kMoveCursor,
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kNormalWrite,
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kOldPrompt,
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kOnLine,
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kPreviousKey,
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kPrompt,
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kQuestionCallback,
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kRefreshLine,
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kSawKeyPress,
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kSawReturnAt,
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kSetRawMode,
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kTabComplete,
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kTabCompleter,
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kTtyWrite,
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kWordLeft,
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kWordRight,
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kWriteToOutput,
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};
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export function InterfaceConstructor(input, output, completer, terminal) {
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this[kSawReturnAt] = 0;
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// TODO(BridgeAR): Document this property. The name is not ideal, so we
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// might want to expose an alias and document that instead.
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this.isCompletionEnabled = true;
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this[kSawKeyPress] = false;
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this[kPreviousKey] = null;
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this.escapeCodeTimeout = ESCAPE_CODE_TIMEOUT;
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this.tabSize = 8;
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Function.prototype.call(EventEmitter, this);
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let history;
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let historySize;
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let removeHistoryDuplicates = false;
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let crlfDelay;
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let prompt = "> ";
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let signal;
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if (input?.input) {
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// An options object was given
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output = input.output;
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completer = input.completer;
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terminal = input.terminal;
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history = input.history;
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historySize = input.historySize;
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signal = input.signal;
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if (input.tabSize !== undefined) {
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validateUint32(input.tabSize, "tabSize", true);
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this.tabSize = input.tabSize;
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}
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removeHistoryDuplicates = input.removeHistoryDuplicates;
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if (input.prompt !== undefined) {
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prompt = input.prompt;
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}
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if (input.escapeCodeTimeout !== undefined) {
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if (Number.isFinite(input.escapeCodeTimeout)) {
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this.escapeCodeTimeout = input.escapeCodeTimeout;
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} else {
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throw new ERR_INVALID_ARG_VALUE(
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"input.escapeCodeTimeout",
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this.escapeCodeTimeout,
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);
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}
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}
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if (signal) {
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validateAbortSignal(signal, "options.signal");
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}
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crlfDelay = input.crlfDelay;
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input = input.input;
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}
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if (completer !== undefined && typeof completer !== "function") {
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throw new ERR_INVALID_ARG_VALUE("completer", completer);
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}
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if (history === undefined) {
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history = [];
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} else {
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validateArray(history, "history");
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}
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if (historySize === undefined) {
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historySize = kHistorySize;
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}
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if (
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typeof historySize !== "number" ||
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Number.isNaN(historySize) ||
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historySize < 0
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) {
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throw new ERR_INVALID_ARG_VALUE.RangeError("historySize", historySize);
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}
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// Backwards compat; check the isTTY prop of the output stream
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// when `terminal` was not specified
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if (terminal === undefined && !(output === null || output === undefined)) {
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terminal = !!output.isTTY;
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}
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const self = this;
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this.line = "";
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this[kSubstringSearch] = null;
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this.output = output;
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this.input = input;
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this.history = history;
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this.historySize = historySize;
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this.removeHistoryDuplicates = !!removeHistoryDuplicates;
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this.crlfDelay = crlfDelay
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? Math.max(kMincrlfDelay, crlfDelay)
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: kMincrlfDelay;
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this.completer = completer;
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this.setPrompt(prompt);
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this.terminal = !!terminal;
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function onerror(err) {
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self.emit("error", err);
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}
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function ondata(data) {
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self[kNormalWrite](data);
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}
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function onend() {
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if (
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typeof self[kLine_buffer] === "string" &&
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self[kLine_buffer].length > 0
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) {
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self.emit("line", self[kLine_buffer]);
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}
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self.close();
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}
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function ontermend() {
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if (typeof self.line === "string" && self.line.length > 0) {
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self.emit("line", self.line);
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}
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self.close();
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}
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function onkeypress(s, key) {
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self[kTtyWrite](s, key);
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if (key && key.sequence) {
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// If the key.sequence is half of a surrogate pair
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// (>= 0xd800 and <= 0xdfff), refresh the line so
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// the character is displayed appropriately.
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const ch = key.sequence.codePointAt(0);
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if (ch >= 0xd800 && ch <= 0xdfff) self[kRefreshLine]();
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}
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}
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function onresize() {
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self[kRefreshLine]();
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}
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this[kLineObjectStream] = undefined;
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input.on("error", onerror);
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if (!this.terminal) {
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function onSelfCloseWithoutTerminal() {
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input.removeListener("data", ondata);
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input.removeListener("error", onerror);
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input.removeListener("end", onend);
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}
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input.on("data", ondata);
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input.on("end", onend);
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self.once("close", onSelfCloseWithoutTerminal);
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this[kDecoder] = new StringDecoder("utf8");
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} else {
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function onSelfCloseWithTerminal() {
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input.removeListener("keypress", onkeypress);
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input.removeListener("error", onerror);
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input.removeListener("end", ontermend);
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if (output !== null && output !== undefined) {
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output.removeListener("resize", onresize);
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}
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}
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emitKeypressEvents(input, this);
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// `input` usually refers to stdin
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input.on("keypress", onkeypress);
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input.on("end", ontermend);
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this[kSetRawMode](true);
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this.terminal = true;
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// Cursor position on the line.
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this.cursor = 0;
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this.historyIndex = -1;
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if (output !== null && output !== undefined) {
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output.on("resize", onresize);
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}
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self.once("close", onSelfCloseWithTerminal);
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}
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if (signal) {
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const onAborted = () => self.close();
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if (signal.aborted) {
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process.nextTick(onAborted);
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} else {
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signal.addEventListener("abort", onAborted, { once: true });
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self.once("close", () => signal.removeEventListener("abort", onAborted));
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}
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}
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// Current line
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this.line = "";
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input.resume();
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}
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Object.setPrototypeOf(InterfaceConstructor.prototype, EventEmitter.prototype);
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Object.setPrototypeOf(InterfaceConstructor, EventEmitter);
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export class Interface extends InterfaceConstructor {
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// eslint-disable-next-line no-useless-constructor
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constructor(input, output, completer, terminal) {
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super(input, output, completer, terminal);
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}
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get columns() {
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if (this.output && this.output.columns) return this.output.columns;
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return Infinity;
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}
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/**
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* Sets the prompt written to the output.
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* @param {string} prompt
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* @returns {void}
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*/
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setPrompt(prompt) {
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this[kPrompt] = prompt;
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}
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/**
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* Returns the current prompt used by `rl.prompt()`.
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* @returns {string}
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*/
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getPrompt() {
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return this[kPrompt];
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}
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[kSetRawMode](mode) {
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const wasInRawMode = this.input.isRaw;
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if (typeof this.input.setRawMode === "function") {
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this.input.setRawMode(mode);
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}
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return wasInRawMode;
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}
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/**
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* Writes the configured `prompt` to a new line in `output`.
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* @param {boolean} [preserveCursor]
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* @returns {void}
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*/
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prompt(preserveCursor) {
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if (this.paused) this.resume();
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if (this.terminal && process.env.TERM !== "dumb") {
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if (!preserveCursor) this.cursor = 0;
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this[kRefreshLine]();
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} else {
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this[kWriteToOutput](this[kPrompt]);
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}
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}
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[kQuestion](query, cb) {
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if (this.closed) {
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throw new ERR_USE_AFTER_CLOSE("readline");
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}
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if (this[kQuestionCallback]) {
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this.prompt();
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} else {
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this[kOldPrompt] = this[kPrompt];
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this.setPrompt(query);
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this[kQuestionCallback] = cb;
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this.prompt();
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}
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}
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[kOnLine](line) {
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if (this[kQuestionCallback]) {
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const cb = this[kQuestionCallback];
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this[kQuestionCallback] = null;
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this.setPrompt(this[kOldPrompt]);
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cb(line);
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} else {
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this.emit("line", line);
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}
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}
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[kQuestionCancel]() {
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if (this[kQuestionCallback]) {
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this[kQuestionCallback] = null;
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this.setPrompt(this[kOldPrompt]);
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this.clearLine();
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}
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}
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[kWriteToOutput](stringToWrite) {
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validateString(stringToWrite, "stringToWrite");
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if (this.output !== null && this.output !== undefined) {
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this.output.write(stringToWrite);
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}
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}
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[kAddHistory]() {
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if (this.line.length === 0) return "";
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// If the history is disabled then return the line
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if (this.historySize === 0) return this.line;
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// If the trimmed line is empty then return the line
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if (this.line.trim().length === 0) return this.line;
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if (this.history.length === 0 || this.history[0] !== this.line) {
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if (this.removeHistoryDuplicates) {
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// Remove older history line if identical to new one
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const dupIndex = this.history.indexOf(this.line);
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if (dupIndex !== -1) this.history.splice(dupIndex, 1);
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}
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this.history.unshift(this.line);
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// Only store so many
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if (this.history.length > this.historySize) {
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this.history.pop();
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}
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}
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this.historyIndex = -1;
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// The listener could change the history object, possibly
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// to remove the last added entry if it is sensitive and should
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// not be persisted in the history, like a password
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const line = this.history[0];
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// Emit history event to notify listeners of update
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this.emit("history", this.history);
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return line;
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}
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[kRefreshLine]() {
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// line length
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const line = this[kPrompt] + this.line;
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const dispPos = this[kGetDisplayPos](line);
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const lineCols = dispPos.cols;
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const lineRows = dispPos.rows;
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// cursor position
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const cursorPos = this.getCursorPos();
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// First move to the bottom of the current line, based on cursor pos
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const prevRows = this.prevRows || 0;
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if (prevRows > 0) {
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moveCursor(this.output, 0, -prevRows);
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}
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// Cursor to left edge.
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cursorTo(this.output, 0);
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// erase data
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clearScreenDown(this.output);
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// Write the prompt and the current buffer content.
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this[kWriteToOutput](line);
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// Force terminal to allocate a new line
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if (lineCols === 0) {
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this[kWriteToOutput](" ");
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}
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// Move cursor to original position.
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cursorTo(this.output, cursorPos.cols);
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const diff = lineRows - cursorPos.rows;
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if (diff > 0) {
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moveCursor(this.output, 0, -diff);
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}
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this.prevRows = cursorPos.rows;
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}
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/**
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* Closes the `readline.Interface` instance.
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* @returns {void}
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*/
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close() {
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if (this.closed) return;
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this.pause();
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if (this.terminal) {
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this[kSetRawMode](false);
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}
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this.closed = true;
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this.emit("close");
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}
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/**
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* Pauses the `input` stream.
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* @returns {void | Interface}
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*/
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pause() {
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if (this.paused) return;
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this.input.pause();
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this.paused = true;
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this.emit("pause");
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return this;
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}
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/**
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* Resumes the `input` stream if paused.
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* @returns {void | Interface}
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*/
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resume() {
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if (!this.paused) return;
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this.input.resume();
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this.paused = false;
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this.emit("resume");
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return this;
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}
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/**
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* Writes either `data` or a `key` sequence identified by
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* `key` to the `output`.
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* @param {string} d
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* @param {{
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* ctrl?: boolean;
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* meta?: boolean;
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* shift?: boolean;
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* name?: string;
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* }} [key]
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* @returns {void}
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*/
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write(d, key) {
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if (this.paused) this.resume();
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if (this.terminal) {
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this[kTtyWrite](d, key);
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} else {
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this[kNormalWrite](d);
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}
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}
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[kNormalWrite](b) {
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if (b === undefined) {
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return;
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}
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let string = this[kDecoder].write(b);
|
|
if (
|
|
this[kSawReturnAt] &&
|
|
Date.now() - this[kSawReturnAt] <= this.crlfDelay
|
|
) {
|
|
string = string.replace(/^\n/, "");
|
|
this[kSawReturnAt] = 0;
|
|
}
|
|
|
|
// Run test() on the new string chunk, not on the entire line buffer.
|
|
const newPartContainsEnding = lineEnding.test(string);
|
|
|
|
if (this[kLine_buffer]) {
|
|
string = this[kLine_buffer] + string;
|
|
this[kLine_buffer] = null;
|
|
}
|
|
if (newPartContainsEnding) {
|
|
this[kSawReturnAt] = string.endsWith("\r") ? Date.now() : 0;
|
|
|
|
// Got one or more newlines; process into "line" events
|
|
const lines = string.split(lineEnding);
|
|
// Either '' or (conceivably) the unfinished portion of the next line
|
|
string = lines.pop();
|
|
this[kLine_buffer] = string;
|
|
for (let n = 0; n < lines.length; n++) this[kOnLine](lines[n]);
|
|
} else if (string) {
|
|
// No newlines this time, save what we have for next time
|
|
this[kLine_buffer] = string;
|
|
}
|
|
}
|
|
|
|
[kInsertString](c) {
|
|
if (this.cursor < this.line.length) {
|
|
const beg = this.line.slice(0, this.cursor);
|
|
const end = this.line.slice(
|
|
this.cursor,
|
|
this.line.length,
|
|
);
|
|
this.line = beg + c + end;
|
|
this.cursor += c.length;
|
|
this[kRefreshLine]();
|
|
} else {
|
|
this.line += c;
|
|
this.cursor += c.length;
|
|
|
|
if (this.getCursorPos().cols === 0) {
|
|
this[kRefreshLine]();
|
|
} else {
|
|
this[kWriteToOutput](c);
|
|
}
|
|
}
|
|
}
|
|
|
|
async [kTabComplete](lastKeypressWasTab) {
|
|
this.pause();
|
|
const string = this.line.slice(0, this.cursor);
|
|
let value;
|
|
try {
|
|
value = await this.completer(string);
|
|
} catch (err) {
|
|
// TODO(bartlomieju): inspect is not ported yet
|
|
// this[kWriteToOutput](`Tab completion error: ${inspect(err)}`);
|
|
this[kWriteToOutput](`Tab completion error: ${err}`);
|
|
return;
|
|
} finally {
|
|
this.resume();
|
|
}
|
|
this[kTabCompleter](lastKeypressWasTab, value);
|
|
}
|
|
|
|
[kTabCompleter](lastKeypressWasTab, { 0: completions, 1: completeOn }) {
|
|
// Result and the text that was completed.
|
|
|
|
if (!completions || completions.length === 0) {
|
|
return;
|
|
}
|
|
|
|
// If there is a common prefix to all matches, then apply that portion.
|
|
const prefix = commonPrefix(
|
|
completions.filter((e) => e !== ""),
|
|
);
|
|
if (
|
|
prefix.startsWith(completeOn) &&
|
|
prefix.length > completeOn.length
|
|
) {
|
|
this[kInsertString](prefix.slice(completeOn.length));
|
|
return;
|
|
} else if (!completeOn.startsWith(prefix)) {
|
|
this.line = this.line.slice(0, this.cursor - completeOn.length) +
|
|
prefix +
|
|
this.line.slice(this.cursor, this.line.length);
|
|
this.cursor = this.cursor - completeOn.length + prefix.length;
|
|
this._refreshLine();
|
|
return;
|
|
}
|
|
|
|
if (!lastKeypressWasTab) {
|
|
return;
|
|
}
|
|
|
|
// Apply/show completions.
|
|
const completionsWidth = completions.map(
|
|
(e) => getStringWidth(e),
|
|
);
|
|
const width = Math.max.apply(completionsWidth) + 2; // 2 space padding
|
|
let maxColumns = Math.floor(this.columns / width) || 1;
|
|
if (maxColumns === Infinity) {
|
|
maxColumns = 1;
|
|
}
|
|
let output = "\r\n";
|
|
let lineIndex = 0;
|
|
let whitespace = 0;
|
|
for (let i = 0; i < completions.length; i++) {
|
|
const completion = completions[i];
|
|
if (completion === "" || lineIndex === maxColumns) {
|
|
output += "\r\n";
|
|
lineIndex = 0;
|
|
whitespace = 0;
|
|
} else {
|
|
output += " ".repeat(whitespace);
|
|
}
|
|
if (completion !== "") {
|
|
output += completion;
|
|
whitespace = width - completionsWidth[i];
|
|
lineIndex++;
|
|
} else {
|
|
output += "\r\n";
|
|
}
|
|
}
|
|
if (lineIndex !== 0) {
|
|
output += "\r\n\r\n";
|
|
}
|
|
this[kWriteToOutput](output);
|
|
this[kRefreshLine]();
|
|
}
|
|
|
|
[kWordLeft]() {
|
|
if (this.cursor > 0) {
|
|
// Reverse the string and match a word near beginning
|
|
// to avoid quadratic time complexity
|
|
const leading = this.line.slice(0, this.cursor);
|
|
const reversed = Array.from(leading).reverse().join("");
|
|
const match = reversed.match(/^\s*(?:[^\w\s]+|\w+)?/);
|
|
this[kMoveCursor](-match[0].length);
|
|
}
|
|
}
|
|
|
|
[kWordRight]() {
|
|
if (this.cursor < this.line.length) {
|
|
const trailing = this.line.slice(this.cursor);
|
|
const match = trailing.match(/^(?:\s+|[^\w\s]+|\w+)\s*/);
|
|
this[kMoveCursor](match[0].length);
|
|
}
|
|
}
|
|
|
|
[kDeleteLeft]() {
|
|
if (this.cursor > 0 && this.line.length > 0) {
|
|
// The number of UTF-16 units comprising the character to the left
|
|
const charSize = charLengthLeft(this.line, this.cursor);
|
|
this.line = this.line.slice(0, this.cursor - charSize) +
|
|
this.line.slice(this.cursor, this.line.length);
|
|
|
|
this.cursor -= charSize;
|
|
this[kRefreshLine]();
|
|
}
|
|
}
|
|
|
|
[kDeleteRight]() {
|
|
if (this.cursor < this.line.length) {
|
|
// The number of UTF-16 units comprising the character to the left
|
|
const charSize = charLengthAt(this.line, this.cursor);
|
|
this.line = this.line.slice(0, this.cursor) +
|
|
this.line.slice(
|
|
this.cursor + charSize,
|
|
this.line.length,
|
|
);
|
|
this[kRefreshLine]();
|
|
}
|
|
}
|
|
|
|
[kDeleteWordLeft]() {
|
|
if (this.cursor > 0) {
|
|
// Reverse the string and match a word near beginning
|
|
// to avoid quadratic time complexity
|
|
let leading = this.line.slice(0, this.cursor);
|
|
const reversed = Array.from(leading).reverse().join("");
|
|
const match = reversed.match(/^\s*(?:[^\w\s]+|\w+)?/);
|
|
leading = leading.slice(
|
|
0,
|
|
leading.length - match[0].length,
|
|
);
|
|
this.line = leading +
|
|
this.line.slice(this.cursor, this.line.length);
|
|
this.cursor = leading.length;
|
|
this[kRefreshLine]();
|
|
}
|
|
}
|
|
|
|
[kDeleteWordRight]() {
|
|
if (this.cursor < this.line.length) {
|
|
const trailing = this.line.slice(this.cursor);
|
|
const match = trailing.match(/^(?:\s+|\W+|\w+)\s*/);
|
|
this.line = this.line.slice(0, this.cursor) +
|
|
trailing.slice(match[0].length);
|
|
this[kRefreshLine]();
|
|
}
|
|
}
|
|
|
|
[kDeleteLineLeft]() {
|
|
this.line = this.line.slice(this.cursor);
|
|
this.cursor = 0;
|
|
this[kRefreshLine]();
|
|
}
|
|
|
|
[kDeleteLineRight]() {
|
|
this.line = this.line.slice(0, this.cursor);
|
|
this[kRefreshLine]();
|
|
}
|
|
|
|
clearLine() {
|
|
this[kMoveCursor](+Infinity);
|
|
this[kWriteToOutput]("\r\n");
|
|
this.line = "";
|
|
this.cursor = 0;
|
|
this.prevRows = 0;
|
|
}
|
|
|
|
[kLine]() {
|
|
const line = this[kAddHistory]();
|
|
this.clearLine();
|
|
this[kOnLine](line);
|
|
}
|
|
|
|
// TODO(BridgeAR): Add underscores to the search part and a red background in
|
|
// case no match is found. This should only be the visual part and not the
|
|
// actual line content!
|
|
// TODO(BridgeAR): In case the substring based search is active and the end is
|
|
// reached, show a comment how to search the history as before. E.g., using
|
|
// <ctrl> + N. Only show this after two/three UPs or DOWNs, not on the first
|
|
// one.
|
|
[kHistoryNext]() {
|
|
if (this.historyIndex >= 0) {
|
|
const search = this[kSubstringSearch] || "";
|
|
let index = this.historyIndex - 1;
|
|
while (
|
|
index >= 0 &&
|
|
(!this.history[index].startsWith(search) ||
|
|
this.line === this.history[index])
|
|
) {
|
|
index--;
|
|
}
|
|
if (index === -1) {
|
|
this.line = search;
|
|
} else {
|
|
this.line = this.history[index];
|
|
}
|
|
this.historyIndex = index;
|
|
this.cursor = this.line.length; // Set cursor to end of line.
|
|
this[kRefreshLine]();
|
|
}
|
|
}
|
|
|
|
[kHistoryPrev]() {
|
|
if (this.historyIndex < this.history.length && this.history.length) {
|
|
const search = this[kSubstringSearch] || "";
|
|
let index = this.historyIndex + 1;
|
|
while (
|
|
index < this.history.length &&
|
|
(!this.history[index].startsWith(search) ||
|
|
this.line === this.history[index])
|
|
) {
|
|
index++;
|
|
}
|
|
if (index === this.history.length) {
|
|
this.line = search;
|
|
} else {
|
|
this.line = this.history[index];
|
|
}
|
|
this.historyIndex = index;
|
|
this.cursor = this.line.length; // Set cursor to end of line.
|
|
this[kRefreshLine]();
|
|
}
|
|
}
|
|
|
|
// Returns the last character's display position of the given string
|
|
[kGetDisplayPos](str) {
|
|
let offset = 0;
|
|
const col = this.columns;
|
|
let rows = 0;
|
|
str = stripVTControlCharacters(str);
|
|
for (const char of str[Symbol.iterator]()) {
|
|
if (char === "\n") {
|
|
// Rows must be incremented by 1 even if offset = 0 or col = +Infinity.
|
|
rows += Math.ceil(offset / col) || 1;
|
|
offset = 0;
|
|
continue;
|
|
}
|
|
// Tabs must be aligned by an offset of the tab size.
|
|
if (char === "\t") {
|
|
offset += this.tabSize - (offset % this.tabSize);
|
|
continue;
|
|
}
|
|
const width = getStringWidth(char);
|
|
if (width === 0 || width === 1) {
|
|
offset += width;
|
|
} else {
|
|
// width === 2
|
|
if ((offset + 1) % col === 0) {
|
|
offset++;
|
|
}
|
|
offset += 2;
|
|
}
|
|
}
|
|
const cols = offset % col;
|
|
rows += (offset - cols) / col;
|
|
return { cols, rows };
|
|
}
|
|
|
|
/**
|
|
* Returns the real position of the cursor in relation
|
|
* to the input prompt + string.
|
|
* @returns {{
|
|
* rows: number;
|
|
* cols: number;
|
|
* }}
|
|
*/
|
|
getCursorPos() {
|
|
const strBeforeCursor = this[kPrompt] +
|
|
this.line.slice(0, this.cursor);
|
|
return this[kGetDisplayPos](strBeforeCursor);
|
|
}
|
|
|
|
// This function moves cursor dx places to the right
|
|
// (-dx for left) and refreshes the line if it is needed.
|
|
[kMoveCursor](dx) {
|
|
if (dx === 0) {
|
|
return;
|
|
}
|
|
const oldPos = this.getCursorPos();
|
|
this.cursor += dx;
|
|
|
|
// Bounds check
|
|
if (this.cursor < 0) {
|
|
this.cursor = 0;
|
|
} else if (this.cursor > this.line.length) {
|
|
this.cursor = this.line.length;
|
|
}
|
|
|
|
const newPos = this.getCursorPos();
|
|
|
|
// Check if cursor stayed on the line.
|
|
if (oldPos.rows === newPos.rows) {
|
|
const diffWidth = newPos.cols - oldPos.cols;
|
|
moveCursor(this.output, diffWidth, 0);
|
|
} else {
|
|
this[kRefreshLine]();
|
|
}
|
|
}
|
|
|
|
// Handle a write from the tty
|
|
[kTtyWrite](s, key) {
|
|
const previousKey = this[kPreviousKey];
|
|
key = key || {};
|
|
this[kPreviousKey] = key;
|
|
|
|
// Activate or deactivate substring search.
|
|
if (
|
|
(key.name === "up" || key.name === "down") &&
|
|
!key.ctrl &&
|
|
!key.meta &&
|
|
!key.shift
|
|
) {
|
|
if (this[kSubstringSearch] === null) {
|
|
this[kSubstringSearch] = this.line.slice(
|
|
0,
|
|
this.cursor,
|
|
);
|
|
}
|
|
} else if (this[kSubstringSearch] !== null) {
|
|
this[kSubstringSearch] = null;
|
|
// Reset the index in case there's no match.
|
|
if (this.history.length === this.historyIndex) {
|
|
this.historyIndex = -1;
|
|
}
|
|
}
|
|
|
|
// Ignore escape key, fixes
|
|
// https://github.com/nodejs/node-v0.x-archive/issues/2876.
|
|
if (key.name === "escape") return;
|
|
|
|
if (key.ctrl && key.shift) {
|
|
/* Control and shift pressed */
|
|
switch (key.name) {
|
|
// TODO(BridgeAR): The transmitted escape sequence is `\b` and that is
|
|
// identical to <ctrl>-h. It should have a unique escape sequence.
|
|
case "backspace":
|
|
this[kDeleteLineLeft]();
|
|
break;
|
|
|
|
case "delete":
|
|
this[kDeleteLineRight]();
|
|
break;
|
|
}
|
|
} else if (key.ctrl) {
|
|
/* Control key pressed */
|
|
|
|
switch (key.name) {
|
|
case "c":
|
|
if (this.listenerCount("SIGINT") > 0) {
|
|
this.emit("SIGINT");
|
|
} else {
|
|
// This readline instance is finished
|
|
this.close();
|
|
}
|
|
break;
|
|
|
|
case "h": // delete left
|
|
this[kDeleteLeft]();
|
|
break;
|
|
|
|
case "d": // delete right or EOF
|
|
if (this.cursor === 0 && this.line.length === 0) {
|
|
// This readline instance is finished
|
|
this.close();
|
|
} else if (this.cursor < this.line.length) {
|
|
this[kDeleteRight]();
|
|
}
|
|
break;
|
|
|
|
case "u": // Delete from current to start of line
|
|
this[kDeleteLineLeft]();
|
|
break;
|
|
|
|
case "k": // Delete from current to end of line
|
|
this[kDeleteLineRight]();
|
|
break;
|
|
|
|
case "a": // Go to the start of the line
|
|
this[kMoveCursor](-Infinity);
|
|
break;
|
|
|
|
case "e": // Go to the end of the line
|
|
this[kMoveCursor](+Infinity);
|
|
break;
|
|
|
|
case "b": // back one character
|
|
this[kMoveCursor](-charLengthLeft(this.line, this.cursor));
|
|
break;
|
|
|
|
case "f": // Forward one character
|
|
this[kMoveCursor](+charLengthAt(this.line, this.cursor));
|
|
break;
|
|
|
|
case "l": // Clear the whole screen
|
|
cursorTo(this.output, 0, 0);
|
|
clearScreenDown(this.output);
|
|
this[kRefreshLine]();
|
|
break;
|
|
|
|
case "n": // next history item
|
|
this[kHistoryNext]();
|
|
break;
|
|
|
|
case "p": // Previous history item
|
|
this[kHistoryPrev]();
|
|
break;
|
|
|
|
case "z":
|
|
if (process.platform === "win32") break;
|
|
if (this.listenerCount("SIGTSTP") > 0) {
|
|
this.emit("SIGTSTP");
|
|
} else {
|
|
process.once("SIGCONT", () => {
|
|
// Don't raise events if stream has already been abandoned.
|
|
if (!this.paused) {
|
|
// Stream must be paused and resumed after SIGCONT to catch
|
|
// SIGINT, SIGTSTP, and EOF.
|
|
this.pause();
|
|
this.emit("SIGCONT");
|
|
}
|
|
// Explicitly re-enable "raw mode" and move the cursor to
|
|
// the correct position.
|
|
// See https://github.com/joyent/node/issues/3295.
|
|
this[kSetRawMode](true);
|
|
this[kRefreshLine]();
|
|
});
|
|
this[kSetRawMode](false);
|
|
process.kill(process.pid, "SIGTSTP");
|
|
}
|
|
break;
|
|
|
|
case "w": // Delete backwards to a word boundary
|
|
// TODO(BridgeAR): The transmitted escape sequence is `\b` and that is
|
|
// identical to <ctrl>-h. It should have a unique escape sequence.
|
|
// Falls through
|
|
case "backspace":
|
|
this[kDeleteWordLeft]();
|
|
break;
|
|
|
|
case "delete": // Delete forward to a word boundary
|
|
this[kDeleteWordRight]();
|
|
break;
|
|
|
|
case "left":
|
|
this[kWordLeft]();
|
|
break;
|
|
|
|
case "right":
|
|
this[kWordRight]();
|
|
break;
|
|
}
|
|
} else if (key.meta) {
|
|
/* Meta key pressed */
|
|
|
|
switch (key.name) {
|
|
case "b": // backward word
|
|
this[kWordLeft]();
|
|
break;
|
|
|
|
case "f": // forward word
|
|
this[kWordRight]();
|
|
break;
|
|
|
|
case "d": // delete forward word
|
|
case "delete":
|
|
this[kDeleteWordRight]();
|
|
break;
|
|
|
|
case "backspace": // Delete backwards to a word boundary
|
|
this[kDeleteWordLeft]();
|
|
break;
|
|
}
|
|
} else {
|
|
/* No modifier keys used */
|
|
|
|
// \r bookkeeping is only relevant if a \n comes right after.
|
|
if (this[kSawReturnAt] && key.name !== "enter") this[kSawReturnAt] = 0;
|
|
|
|
switch (key.name) {
|
|
case "return": // Carriage return, i.e. \r
|
|
this[kSawReturnAt] = Date.now();
|
|
this[kLine]();
|
|
break;
|
|
|
|
case "enter":
|
|
// When key interval > crlfDelay
|
|
if (
|
|
this[kSawReturnAt] === 0 ||
|
|
Date.now() - this[kSawReturnAt] > this.crlfDelay
|
|
) {
|
|
this[kLine]();
|
|
}
|
|
this[kSawReturnAt] = 0;
|
|
break;
|
|
|
|
case "backspace":
|
|
this[kDeleteLeft]();
|
|
break;
|
|
|
|
case "delete":
|
|
this[kDeleteRight]();
|
|
break;
|
|
|
|
case "left":
|
|
// Obtain the code point to the left
|
|
this[kMoveCursor](-charLengthLeft(this.line, this.cursor));
|
|
break;
|
|
|
|
case "right":
|
|
this[kMoveCursor](+charLengthAt(this.line, this.cursor));
|
|
break;
|
|
|
|
case "home":
|
|
this[kMoveCursor](-Infinity);
|
|
break;
|
|
|
|
case "end":
|
|
this[kMoveCursor](+Infinity);
|
|
break;
|
|
|
|
case "up":
|
|
this[kHistoryPrev]();
|
|
break;
|
|
|
|
case "down":
|
|
this[kHistoryNext]();
|
|
break;
|
|
|
|
case "tab":
|
|
// If tab completion enabled, do that...
|
|
if (
|
|
typeof this.completer === "function" &&
|
|
this.isCompletionEnabled
|
|
) {
|
|
const lastKeypressWasTab = previousKey &&
|
|
previousKey.name === "tab";
|
|
this[kTabComplete](lastKeypressWasTab);
|
|
break;
|
|
}
|
|
// falls through
|
|
default:
|
|
if (typeof s === "string" && s) {
|
|
const lines = s.split(/\r\n|\n|\r/);
|
|
for (let i = 0, len = lines.length; i < len; i++) {
|
|
if (i > 0) {
|
|
this[kLine]();
|
|
}
|
|
this[kInsertString](lines[i]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates an `AsyncIterator` object that iterates through
|
|
* each line in the input stream as a string.
|
|
* @typedef {{
|
|
* [Symbol.asyncIterator]: () => InterfaceAsyncIterator,
|
|
* next: () => Promise<string>
|
|
* }} InterfaceAsyncIterator
|
|
* @returns {InterfaceAsyncIterator}
|
|
*/
|
|
[Symbol.asyncIterator]() {
|
|
if (this[kLineObjectStream] === undefined) {
|
|
const readable = new Readable({
|
|
objectMode: true,
|
|
read: () => {
|
|
this.resume();
|
|
},
|
|
destroy: (err, cb) => {
|
|
this.off("line", lineListener);
|
|
this.off("close", closeListener);
|
|
this.close();
|
|
cb(err);
|
|
},
|
|
});
|
|
const lineListener = (input) => {
|
|
if (!readable.push(input)) {
|
|
// TODO(rexagod): drain to resume flow
|
|
this.pause();
|
|
}
|
|
};
|
|
const closeListener = () => {
|
|
readable.push(null);
|
|
};
|
|
const errorListener = (err) => {
|
|
readable.destroy(err);
|
|
};
|
|
this.on("error", errorListener);
|
|
this.on("line", lineListener);
|
|
this.on("close", closeListener);
|
|
this[kLineObjectStream] = readable;
|
|
}
|
|
|
|
return this[kLineObjectStream][Symbol.asyncIterator]();
|
|
}
|
|
}
|