458 lines
10 KiB
JavaScript
458 lines
10 KiB
JavaScript
/* jslint node: true */
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'use strict';
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//
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// ANSI Terminal Support
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//
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// Resources:
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// * http://ansi-bbs.org/
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// * http://www.bbsdocumentary.com/library/PROGRAMS/GRAPHICS/ANSI/ansisys.txt
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// * http://en.wikipedia.org/wiki/ANSI_escape_code
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// * https://github.com/chjj/term.js/blob/master/src/term.js
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// * http://www.inwap.com/pdp10/ansicode.txt
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//
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// ENiGMA½
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const miscUtil = require('./misc_util.js');
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// deps
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const assert = require('assert');
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const _ = require('lodash');
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exports.getFGColorValue = getFGColorValue;
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exports.getBGColorValue = getBGColorValue;
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exports.sgr = sgr;
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exports.getSGRFromGraphicRendition = getSGRFromGraphicRendition;
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exports.clearScreen = clearScreen;
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exports.resetScreen = resetScreen;
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exports.normal = normal;
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exports.goHome = goHome;
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exports.disableVT100LineWrapping = disableVT100LineWrapping;
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exports.setSyncTERMFont = setSyncTERMFont;
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exports.getSyncTERMFontFromAlias = getSyncTERMFontFromAlias;
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exports.setCursorStyle = setCursorStyle;
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exports.setEmulatedBaudRate = setEmulatedBaudRate;
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//
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// See also
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// https://github.com/TooTallNate/ansi.js/blob/master/lib/ansi.js
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const ESC_CSI = '\u001b[';
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const CONTROL = {
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up : 'A',
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down : 'B',
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forward : 'C',
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right : 'C',
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back : 'D',
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left : 'D',
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nextLine : 'E',
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prevLine : 'F',
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horizAbsolute : 'G',
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//
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// CSI [ p1 ] J
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// Erase in Page / Erase Data
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// Defaults: p1 = 0
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// Erases from the current screen according to the value of p1
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// 0 - Erase from the current position to the end of the screen.
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// 1 - Erase from the current position to the start of the screen.
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// 2 - Erase entire screen. As a violation of ECMA-048, also moves
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// the cursor to position 1/1 as a number of BBS programs assume
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// this behaviour.
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// Erased characters are set to the current attribute.
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//
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// Support:
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// * SyncTERM: Works as expected
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// * NetRunner: Always clears a screen *height* (e.g. 25) regardless of p1
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// and screen remainder
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//
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eraseData : 'J',
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eraseLine : 'K',
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insertLine : 'L',
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//
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// CSI [ p1 ] M
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// Delete Line(s) / "ANSI" Music
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// Defaults: p1 = 1
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// Deletes the current line and the p1 - 1 lines after it scrolling the
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// first non-deleted line up to the current line and filling the newly
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// empty lines at the end of the screen with the current attribute.
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// If "ANSI" Music is fully enabled (CSI = 2 M), performs "ANSI" music
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// instead.
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// See "ANSI" MUSIC section for more details.
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//
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// Support:
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// * SyncTERM: Works as expected
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// * NetRunner:
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//
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// General Notes:
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// See also notes in bansi.txt and cterm.txt about the various
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// incompatibilities & oddities around this sequence. ANSI-BBS
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// states that it *should* work with any value of p1.
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//
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deleteLine : 'M',
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ansiMusic : 'M',
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scrollUp : 'S',
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scrollDown : 'T',
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setScrollRegion : 'r',
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savePos : 's',
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restorePos : 'u',
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queryPos : '6n',
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queryScreenSize : '255n', // See bansi.txt
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goto : 'H', // row Pr, column Pc -- same as f
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gotoAlt : 'f', // same as H
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blinkToBrightIntensity : '?33h',
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blinkNormal : '?33l',
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emulationSpeed : '*r', // Set output emulation speed. See cterm.txt
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hideCursor : '?25l', // Nonstandard - cterm.txt
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showCursor : '?25h', // Nonstandard - cterm.txt
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queryDeviceAttributes : 'c', // Nonstandard - cterm.txt
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// :TODO: see https://code.google.com/p/conemu-maximus5/wiki/AnsiEscapeCodes
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// apparently some terms can report screen size and text area via 18t and 19t
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};
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//
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// Select Graphics Rendition
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// See http://cvs.synchro.net/cgi-bin/viewcvs.cgi/*checkout*/src/conio/cterm.txt
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//
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const SGRValues = {
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reset : 0,
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bold : 1,
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dim : 2,
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blink : 5,
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fastBlink : 6,
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negative : 7,
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hidden : 8,
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normal : 22, //
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steady : 25,
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positive : 27,
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black : 30,
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red : 31,
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green : 32,
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yellow : 33,
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blue : 34,
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magenta : 35,
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cyan : 36,
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white : 37,
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blackBG : 40,
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redBG : 41,
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greenBG : 42,
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yellowBG : 43,
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blueBG : 44,
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magentaBG : 45,
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cyanBG : 46,
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whiteBG : 47,
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};
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function getFGColorValue(name) {
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return SGRValues[name];
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}
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function getBGColorValue(name) {
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return SGRValues[name + 'BG'];
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}
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// See http://cvs.synchro.net/cgi-bin/viewcvs.cgi/*checkout*/src/conio/cterm.txt
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// :TODO: document
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// :TODO: Create mappings for aliases... maybe make this a map to values instead
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// :TODO: Break this up in to two parts:
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// 1) FONT_AND_CODE_PAGES (e.g. SyncTERM/cterm)
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// 2) SAUCE_FONT_MAP: Sauce name(s) -> items in FONT_AND_CODE_PAGES.
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// ...we can then have getFontFromSAUCEName(sauceFontName)
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// Also, create a SAUCE_ENCODING_MAP: SAUCE font name -> encodings
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//
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// An array of CTerm/SyncTERM font/encoding values. Each entry's index
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// corresponds to it's escape sequence value (e.g. cp437 = 0)
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//
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// See https://github.com/protomouse/synchronet/blob/master/src/conio/cterm.txt
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//
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const SYNCTERM_FONT_AND_ENCODING_TABLE = [
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'cp437',
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'cp1251',
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'koi8_r',
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'iso8859_2',
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'iso8859_4',
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'cp866',
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'iso8859_9',
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'haik8',
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'iso8859_8',
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'koi8_u',
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'iso8859_15',
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'iso8859_4',
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'koi8_r_b',
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'iso8859_4',
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'iso8859_5',
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'ARMSCII_8',
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'iso8859_15',
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'cp850',
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'cp850',
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'cp885',
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'cp1251',
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'iso8859_7',
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'koi8-r_c',
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'iso8859_4',
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'iso8859_1',
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'cp866',
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'cp437',
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'cp866',
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'cp885',
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'cp866_u',
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'iso8859_1',
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'cp1131',
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'c64_upper',
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'c64_lower',
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'c128_upper',
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'c128_lower',
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'atari',
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'pot_noodle',
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'mo_soul',
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'microknight_plus',
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'topaz_plus',
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'microknight',
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'topaz',
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];
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//
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// A map of various font name/aliases such as those used
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// in SAUCE records to SyncTERM/CTerm names
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//
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// This table contains lowercased entries with any spaces
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// replaced with '_' for lookup purposes.
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//
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const FONT_ALIAS_TO_SYNCTERM_MAP = {
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'cp437' : 'cp437',
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'ibm_vga' : 'cp437',
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'ibmpc' : 'cp437',
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'ibm_pc' : 'cp437',
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'pc' : 'cp437',
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'cp437_art' : 'cp437',
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'ibmpcart' : 'cp437',
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'ibmpc_art' : 'cp437',
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'ibm_pc_art' : 'cp437',
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'msdos_art' : 'cp437',
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'msdosart' : 'cp437',
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'pc_art' : 'cp437',
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'pcart' : 'cp437',
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'ibm_vga50' : 'cp437',
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'ibm_vga25g' : 'cp437',
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'ibm_ega' : 'cp437',
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'ibm_ega43' : 'cp437',
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'topaz' : 'topaz',
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'amiga_topaz_1' : 'topaz',
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'amiga_topaz_1+' : 'topaz_plus',
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'topazplus' : 'topaz_plus',
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'topaz_plus' : 'topaz_plus',
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'amiga_topaz_2' : 'topaz',
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'amiga_topaz_2+' : 'topaz_plus',
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'topaz2plus' : 'topaz_plus',
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'pot_noodle' : 'pot_noodle',
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'p0tnoodle' : 'pot_noodle',
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'amiga_p0t-noodle' : 'pot_noodle',
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'mo_soul' : 'mo_soul',
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'mosoul' : 'mo_soul',
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'mO\'sOul' : 'mo_soul',
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'amiga_microknight' : 'microknight',
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'amiga_microknight+' : 'microknight_plus',
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'atari' : 'atari',
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'atarist' : 'atari',
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};
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function setSyncTERMFont(name, fontPage) {
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const p1 = miscUtil.valueWithDefault(fontPage, 0);
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assert(p1 >= 0 && p1 <= 3);
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const p2 = SYNCTERM_FONT_AND_ENCODING_TABLE.indexOf(name);
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if(p2 > -1) {
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return `${ESC_CSI}${p1};${p2} D`;
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}
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return '';
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}
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function getSyncTERMFontFromAlias(alias) {
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return FONT_ALIAS_TO_SYNCTERM_MAP[alias.toLowerCase().replace(/ /g, '_')];
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}
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const DEC_CURSOR_STYLE = {
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'blinking block' : 0,
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'default' : 1,
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'steady block' : 2,
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'blinking underline' : 3,
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'steady underline' : 4,
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'blinking bar' : 5,
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'steady bar' : 6,
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};
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function setCursorStyle(cursorStyle) {
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const ps = DEC_CURSOR_STYLE[cursorStyle];
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if(ps) {
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return `${ESC_CSI}${ps} q`;
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}
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return '';
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}
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// Create methods such as up(), nextLine(),...
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Object.keys(CONTROL).forEach(function onControlName(name) {
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const code = CONTROL[name];
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exports[name] = function() {
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let c = code;
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if(arguments.length > 0) {
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// arguments are array like -- we want an array
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c = Array.prototype.slice.call(arguments).map(Math.round).join(';') + code;
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}
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return `${ESC_CSI}${c}`;
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};
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});
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// Create various color methods such as white(), yellowBG(), reset(), ...
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Object.keys(SGRValues).forEach( name => {
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const code = SGRValues[name];
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exports[name] = function() {
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return `${ESC_CSI}${code}m`;
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};
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});
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function sgr() {
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//
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// - Allow an single array or variable number of arguments
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// - Each element can be either a integer or string found in SGRValues
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// which in turn maps to a integer
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//
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if(arguments.length <= 0) {
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return '';
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}
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let result = [];
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const args = Array.isArray(arguments[0]) ? arguments[0] : arguments;
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args.forEach(arg => {
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if(_.isString(arg) && arg in SGRValues) {
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result.push(SGRValues[arg]);
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} else if(_.isNumber(arg)) {
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result.push(arg);
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}
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});
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return `${ESC_CSI}${result.join(';')}m`;
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}
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//
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// Converts a Graphic Rendition object used elsewhere
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// to a ANSI SGR sequence.
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//
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function getSGRFromGraphicRendition(graphicRendition, initialReset) {
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let sgrSeq = [];
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let styleCount = 0;
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[ 'intensity', 'underline', 'blink', 'negative', 'invisible' ].forEach( s => {
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if(graphicRendition[s]) {
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sgrSeq.push(graphicRendition[s]);
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++styleCount;
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}
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});
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if(!styleCount) {
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sgrSeq.push(0);
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}
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if(graphicRendition.fg) {
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sgrSeq.push(graphicRendition.fg);
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}
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if(graphicRendition.bg) {
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sgrSeq.push(graphicRendition.bg);
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}
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if(initialReset) {
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sgrSeq.unshift(0);
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}
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return sgr(sgrSeq);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Shortcuts for common functions
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///////////////////////////////////////////////////////////////////////////////
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function clearScreen() {
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return exports.eraseData(2);
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}
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function resetScreen() {
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return `${exports.reset()}${exports.eraseData(2)}${exports.goHome()}`;
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}
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function normal() {
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return sgr( [ 'normal', 'reset' ] );
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}
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function goHome() {
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return exports.goto(); // no params = home = 1,1
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}
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//
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// Disable auto line wraping @ termWidth
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//
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// See:
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// http://stjarnhimlen.se/snippets/vt100.txt
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// https://github.com/protomouse/synchronet/blob/master/src/conio/cterm.txt
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//
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// WARNING:
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// * Not honored by all clients
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// * If it is honored, ANSI's that rely on this (e.g. do not have \r\n endings
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// and use term width -- generally 80 columns -- will display garbled!
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//
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function disableVT100LineWrapping() {
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return `${ESC_CSI}?7l`;
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}
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function setEmulatedBaudRate(rate) {
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const speed = {
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unlimited : 0,
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off : 0,
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0 : 0,
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300 : 1,
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600 : 2,
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1200 : 3,
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2400 : 4,
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4800 : 5,
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9600 : 6,
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19200 : 7,
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38400 : 8,
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57600 : 9,
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76800 : 10,
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115200 : 11,
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}[rate] || 0;
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return 0 === speed ? exports.emulationSpeed() : exports.emulationSpeed(1, speed);
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}
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