+++ /dev/null
-/**
- * Copyright (c) 2018 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { IParsingState, IDcsHandler, IEscapeSequenceParser, IParams, IOscHandler, IHandlerCollection, CsiHandlerType, OscFallbackHandlerType, IOscParser, EscHandlerType, IDcsParser, DcsFallbackHandlerType, IFunctionIdentifier, ExecuteFallbackHandlerType, CsiFallbackHandlerType, EscFallbackHandlerType, PrintHandlerType, PrintFallbackHandlerType, ExecuteHandlerType } from 'common/parser/Types';
-import { ParserState, ParserAction } from 'common/parser/Constants';
-import { Disposable } from 'common/Lifecycle';
-import { IDisposable } from 'common/Types';
-import { fill } from 'common/TypedArrayUtils';
-import { Params } from 'common/parser/Params';
-import { OscParser } from 'common/parser/OscParser';
-import { DcsParser } from 'common/parser/DcsParser';
-
-/**
- * Table values are generated like this:
- * index: currentState << TableValue.INDEX_STATE_SHIFT | charCode
- * value: action << TableValue.TRANSITION_ACTION_SHIFT | nextState
- */
-const enum TableAccess {
- TRANSITION_ACTION_SHIFT = 4,
- TRANSITION_STATE_MASK = 15,
- INDEX_STATE_SHIFT = 8
-}
-
-/**
- * Transition table for EscapeSequenceParser.
- */
-export class TransitionTable {
- public table: Uint8Array;
-
- constructor(length: number) {
- this.table = new Uint8Array(length);
- }
-
- /**
- * Set default transition.
- * @param action default action
- * @param next default next state
- */
- public setDefault(action: ParserAction, next: ParserState): void {
- fill(this.table, action << TableAccess.TRANSITION_ACTION_SHIFT | next);
- }
-
- /**
- * Add a transition to the transition table.
- * @param code input character code
- * @param state current parser state
- * @param action parser action to be done
- * @param next next parser state
- */
- public add(code: number, state: ParserState, action: ParserAction, next: ParserState): void {
- this.table[state << TableAccess.INDEX_STATE_SHIFT | code] = action << TableAccess.TRANSITION_ACTION_SHIFT | next;
- }
-
- /**
- * Add transitions for multiple input character codes.
- * @param codes input character code array
- * @param state current parser state
- * @param action parser action to be done
- * @param next next parser state
- */
- public addMany(codes: number[], state: ParserState, action: ParserAction, next: ParserState): void {
- for (let i = 0; i < codes.length; i++) {
- this.table[state << TableAccess.INDEX_STATE_SHIFT | codes[i]] = action << TableAccess.TRANSITION_ACTION_SHIFT | next;
- }
- }
-}
-
-
-// Pseudo-character placeholder for printable non-ascii characters (unicode).
-const NON_ASCII_PRINTABLE = 0xA0;
-
-
-/**
- * VT500 compatible transition table.
- * Taken from https://vt100.net/emu/dec_ansi_parser.
- */
-export const VT500_TRANSITION_TABLE = (function (): TransitionTable {
- const table: TransitionTable = new TransitionTable(4095);
-
- // range macro for byte
- const BYTE_VALUES = 256;
- const blueprint = Array.apply(null, Array(BYTE_VALUES)).map((unused: any, i: number) => i);
- const r = (start: number, end: number) => blueprint.slice(start, end);
-
- // Default definitions.
- const PRINTABLES = r(0x20, 0x7f); // 0x20 (SP) included, 0x7F (DEL) excluded
- const EXECUTABLES = r(0x00, 0x18);
- EXECUTABLES.push(0x19);
- EXECUTABLES.push.apply(EXECUTABLES, r(0x1c, 0x20));
-
- const states: number[] = r(ParserState.GROUND, ParserState.DCS_PASSTHROUGH + 1);
- let state: any;
-
- // set default transition
- table.setDefault(ParserAction.ERROR, ParserState.GROUND);
- // printables
- table.addMany(PRINTABLES, ParserState.GROUND, ParserAction.PRINT, ParserState.GROUND);
- // global anywhere rules
- for (state in states) {
- table.addMany([0x18, 0x1a, 0x99, 0x9a], state, ParserAction.EXECUTE, ParserState.GROUND);
- table.addMany(r(0x80, 0x90), state, ParserAction.EXECUTE, ParserState.GROUND);
- table.addMany(r(0x90, 0x98), state, ParserAction.EXECUTE, ParserState.GROUND);
- table.add(0x9c, state, ParserAction.IGNORE, ParserState.GROUND); // ST as terminator
- table.add(0x1b, state, ParserAction.CLEAR, ParserState.ESCAPE); // ESC
- table.add(0x9d, state, ParserAction.OSC_START, ParserState.OSC_STRING); // OSC
- table.addMany([0x98, 0x9e, 0x9f], state, ParserAction.IGNORE, ParserState.SOS_PM_APC_STRING);
- table.add(0x9b, state, ParserAction.CLEAR, ParserState.CSI_ENTRY); // CSI
- table.add(0x90, state, ParserAction.CLEAR, ParserState.DCS_ENTRY); // DCS
- }
- // rules for executables and 7f
- table.addMany(EXECUTABLES, ParserState.GROUND, ParserAction.EXECUTE, ParserState.GROUND);
- table.addMany(EXECUTABLES, ParserState.ESCAPE, ParserAction.EXECUTE, ParserState.ESCAPE);
- table.add(0x7f, ParserState.ESCAPE, ParserAction.IGNORE, ParserState.ESCAPE);
- table.addMany(EXECUTABLES, ParserState.OSC_STRING, ParserAction.IGNORE, ParserState.OSC_STRING);
- table.addMany(EXECUTABLES, ParserState.CSI_ENTRY, ParserAction.EXECUTE, ParserState.CSI_ENTRY);
- table.add(0x7f, ParserState.CSI_ENTRY, ParserAction.IGNORE, ParserState.CSI_ENTRY);
- table.addMany(EXECUTABLES, ParserState.CSI_PARAM, ParserAction.EXECUTE, ParserState.CSI_PARAM);
- table.add(0x7f, ParserState.CSI_PARAM, ParserAction.IGNORE, ParserState.CSI_PARAM);
- table.addMany(EXECUTABLES, ParserState.CSI_IGNORE, ParserAction.EXECUTE, ParserState.CSI_IGNORE);
- table.addMany(EXECUTABLES, ParserState.CSI_INTERMEDIATE, ParserAction.EXECUTE, ParserState.CSI_INTERMEDIATE);
- table.add(0x7f, ParserState.CSI_INTERMEDIATE, ParserAction.IGNORE, ParserState.CSI_INTERMEDIATE);
- table.addMany(EXECUTABLES, ParserState.ESCAPE_INTERMEDIATE, ParserAction.EXECUTE, ParserState.ESCAPE_INTERMEDIATE);
- table.add(0x7f, ParserState.ESCAPE_INTERMEDIATE, ParserAction.IGNORE, ParserState.ESCAPE_INTERMEDIATE);
- // osc
- table.add(0x5d, ParserState.ESCAPE, ParserAction.OSC_START, ParserState.OSC_STRING);
- table.addMany(PRINTABLES, ParserState.OSC_STRING, ParserAction.OSC_PUT, ParserState.OSC_STRING);
- table.add(0x7f, ParserState.OSC_STRING, ParserAction.OSC_PUT, ParserState.OSC_STRING);
- table.addMany([0x9c, 0x1b, 0x18, 0x1a, 0x07], ParserState.OSC_STRING, ParserAction.OSC_END, ParserState.GROUND);
- table.addMany(r(0x1c, 0x20), ParserState.OSC_STRING, ParserAction.IGNORE, ParserState.OSC_STRING);
- // sos/pm/apc does nothing
- table.addMany([0x58, 0x5e, 0x5f], ParserState.ESCAPE, ParserAction.IGNORE, ParserState.SOS_PM_APC_STRING);
- table.addMany(PRINTABLES, ParserState.SOS_PM_APC_STRING, ParserAction.IGNORE, ParserState.SOS_PM_APC_STRING);
- table.addMany(EXECUTABLES, ParserState.SOS_PM_APC_STRING, ParserAction.IGNORE, ParserState.SOS_PM_APC_STRING);
- table.add(0x9c, ParserState.SOS_PM_APC_STRING, ParserAction.IGNORE, ParserState.GROUND);
- table.add(0x7f, ParserState.SOS_PM_APC_STRING, ParserAction.IGNORE, ParserState.SOS_PM_APC_STRING);
- // csi entries
- table.add(0x5b, ParserState.ESCAPE, ParserAction.CLEAR, ParserState.CSI_ENTRY);
- table.addMany(r(0x40, 0x7f), ParserState.CSI_ENTRY, ParserAction.CSI_DISPATCH, ParserState.GROUND);
- table.addMany(r(0x30, 0x3c), ParserState.CSI_ENTRY, ParserAction.PARAM, ParserState.CSI_PARAM);
- table.addMany([0x3c, 0x3d, 0x3e, 0x3f], ParserState.CSI_ENTRY, ParserAction.COLLECT, ParserState.CSI_PARAM);
- table.addMany(r(0x30, 0x3c), ParserState.CSI_PARAM, ParserAction.PARAM, ParserState.CSI_PARAM);
- table.addMany(r(0x40, 0x7f), ParserState.CSI_PARAM, ParserAction.CSI_DISPATCH, ParserState.GROUND);
- table.addMany([0x3c, 0x3d, 0x3e, 0x3f], ParserState.CSI_PARAM, ParserAction.IGNORE, ParserState.CSI_IGNORE);
- table.addMany(r(0x20, 0x40), ParserState.CSI_IGNORE, ParserAction.IGNORE, ParserState.CSI_IGNORE);
- table.add(0x7f, ParserState.CSI_IGNORE, ParserAction.IGNORE, ParserState.CSI_IGNORE);
- table.addMany(r(0x40, 0x7f), ParserState.CSI_IGNORE, ParserAction.IGNORE, ParserState.GROUND);
- table.addMany(r(0x20, 0x30), ParserState.CSI_ENTRY, ParserAction.COLLECT, ParserState.CSI_INTERMEDIATE);
- table.addMany(r(0x20, 0x30), ParserState.CSI_INTERMEDIATE, ParserAction.COLLECT, ParserState.CSI_INTERMEDIATE);
- table.addMany(r(0x30, 0x40), ParserState.CSI_INTERMEDIATE, ParserAction.IGNORE, ParserState.CSI_IGNORE);
- table.addMany(r(0x40, 0x7f), ParserState.CSI_INTERMEDIATE, ParserAction.CSI_DISPATCH, ParserState.GROUND);
- table.addMany(r(0x20, 0x30), ParserState.CSI_PARAM, ParserAction.COLLECT, ParserState.CSI_INTERMEDIATE);
- // esc_intermediate
- table.addMany(r(0x20, 0x30), ParserState.ESCAPE, ParserAction.COLLECT, ParserState.ESCAPE_INTERMEDIATE);
- table.addMany(r(0x20, 0x30), ParserState.ESCAPE_INTERMEDIATE, ParserAction.COLLECT, ParserState.ESCAPE_INTERMEDIATE);
- table.addMany(r(0x30, 0x7f), ParserState.ESCAPE_INTERMEDIATE, ParserAction.ESC_DISPATCH, ParserState.GROUND);
- table.addMany(r(0x30, 0x50), ParserState.ESCAPE, ParserAction.ESC_DISPATCH, ParserState.GROUND);
- table.addMany(r(0x51, 0x58), ParserState.ESCAPE, ParserAction.ESC_DISPATCH, ParserState.GROUND);
- table.addMany([0x59, 0x5a, 0x5c], ParserState.ESCAPE, ParserAction.ESC_DISPATCH, ParserState.GROUND);
- table.addMany(r(0x60, 0x7f), ParserState.ESCAPE, ParserAction.ESC_DISPATCH, ParserState.GROUND);
- // dcs entry
- table.add(0x50, ParserState.ESCAPE, ParserAction.CLEAR, ParserState.DCS_ENTRY);
- table.addMany(EXECUTABLES, ParserState.DCS_ENTRY, ParserAction.IGNORE, ParserState.DCS_ENTRY);
- table.add(0x7f, ParserState.DCS_ENTRY, ParserAction.IGNORE, ParserState.DCS_ENTRY);
- table.addMany(r(0x1c, 0x20), ParserState.DCS_ENTRY, ParserAction.IGNORE, ParserState.DCS_ENTRY);
- table.addMany(r(0x20, 0x30), ParserState.DCS_ENTRY, ParserAction.COLLECT, ParserState.DCS_INTERMEDIATE);
- table.addMany(r(0x30, 0x3c), ParserState.DCS_ENTRY, ParserAction.PARAM, ParserState.DCS_PARAM);
- table.addMany([0x3c, 0x3d, 0x3e, 0x3f], ParserState.DCS_ENTRY, ParserAction.COLLECT, ParserState.DCS_PARAM);
- table.addMany(EXECUTABLES, ParserState.DCS_IGNORE, ParserAction.IGNORE, ParserState.DCS_IGNORE);
- table.addMany(r(0x20, 0x80), ParserState.DCS_IGNORE, ParserAction.IGNORE, ParserState.DCS_IGNORE);
- table.addMany(r(0x1c, 0x20), ParserState.DCS_IGNORE, ParserAction.IGNORE, ParserState.DCS_IGNORE);
- table.addMany(EXECUTABLES, ParserState.DCS_PARAM, ParserAction.IGNORE, ParserState.DCS_PARAM);
- table.add(0x7f, ParserState.DCS_PARAM, ParserAction.IGNORE, ParserState.DCS_PARAM);
- table.addMany(r(0x1c, 0x20), ParserState.DCS_PARAM, ParserAction.IGNORE, ParserState.DCS_PARAM);
- table.addMany(r(0x30, 0x3c), ParserState.DCS_PARAM, ParserAction.PARAM, ParserState.DCS_PARAM);
- table.addMany([0x3c, 0x3d, 0x3e, 0x3f], ParserState.DCS_PARAM, ParserAction.IGNORE, ParserState.DCS_IGNORE);
- table.addMany(r(0x20, 0x30), ParserState.DCS_PARAM, ParserAction.COLLECT, ParserState.DCS_INTERMEDIATE);
- table.addMany(EXECUTABLES, ParserState.DCS_INTERMEDIATE, ParserAction.IGNORE, ParserState.DCS_INTERMEDIATE);
- table.add(0x7f, ParserState.DCS_INTERMEDIATE, ParserAction.IGNORE, ParserState.DCS_INTERMEDIATE);
- table.addMany(r(0x1c, 0x20), ParserState.DCS_INTERMEDIATE, ParserAction.IGNORE, ParserState.DCS_INTERMEDIATE);
- table.addMany(r(0x20, 0x30), ParserState.DCS_INTERMEDIATE, ParserAction.COLLECT, ParserState.DCS_INTERMEDIATE);
- table.addMany(r(0x30, 0x40), ParserState.DCS_INTERMEDIATE, ParserAction.IGNORE, ParserState.DCS_IGNORE);
- table.addMany(r(0x40, 0x7f), ParserState.DCS_INTERMEDIATE, ParserAction.DCS_HOOK, ParserState.DCS_PASSTHROUGH);
- table.addMany(r(0x40, 0x7f), ParserState.DCS_PARAM, ParserAction.DCS_HOOK, ParserState.DCS_PASSTHROUGH);
- table.addMany(r(0x40, 0x7f), ParserState.DCS_ENTRY, ParserAction.DCS_HOOK, ParserState.DCS_PASSTHROUGH);
- table.addMany(EXECUTABLES, ParserState.DCS_PASSTHROUGH, ParserAction.DCS_PUT, ParserState.DCS_PASSTHROUGH);
- table.addMany(PRINTABLES, ParserState.DCS_PASSTHROUGH, ParserAction.DCS_PUT, ParserState.DCS_PASSTHROUGH);
- table.add(0x7f, ParserState.DCS_PASSTHROUGH, ParserAction.IGNORE, ParserState.DCS_PASSTHROUGH);
- table.addMany([0x1b, 0x9c, 0x18, 0x1a], ParserState.DCS_PASSTHROUGH, ParserAction.DCS_UNHOOK, ParserState.GROUND);
- // special handling of unicode chars
- table.add(NON_ASCII_PRINTABLE, ParserState.GROUND, ParserAction.PRINT, ParserState.GROUND);
- table.add(NON_ASCII_PRINTABLE, ParserState.OSC_STRING, ParserAction.OSC_PUT, ParserState.OSC_STRING);
- table.add(NON_ASCII_PRINTABLE, ParserState.CSI_IGNORE, ParserAction.IGNORE, ParserState.CSI_IGNORE);
- table.add(NON_ASCII_PRINTABLE, ParserState.DCS_IGNORE, ParserAction.IGNORE, ParserState.DCS_IGNORE);
- table.add(NON_ASCII_PRINTABLE, ParserState.DCS_PASSTHROUGH, ParserAction.DCS_PUT, ParserState.DCS_PASSTHROUGH);
- return table;
-})();
-
-
-/**
- * EscapeSequenceParser.
- * This class implements the ANSI/DEC compatible parser described by
- * Paul Williams (https://vt100.net/emu/dec_ansi_parser).
- *
- * To implement custom ANSI compliant escape sequences it is not needed to
- * alter this parser, instead consider registering a custom handler.
- * For non ANSI compliant sequences change the transition table with
- * the optional `transitions` constructor argument and
- * reimplement the `parse` method.
- *
- * This parser is currently hardcoded to operate in ZDM (Zero Default Mode)
- * as suggested by the original parser, thus empty parameters are set to 0.
- * This this is not in line with the latest ECMA-48 specification
- * (ZDM was part of the early specs and got completely removed later on).
- *
- * Other than the original parser from vt100.net this parser supports
- * sub parameters in digital parameters separated by colons. Empty sub parameters
- * are set to -1 (no ZDM for sub parameters).
- *
- * About prefix and intermediate bytes:
- * This parser follows the assumptions of the vt100.net parser with these restrictions:
- * - only one prefix byte is allowed as first parameter byte, byte range 0x3c .. 0x3f
- * - max. two intermediates are respected, byte range 0x20 .. 0x2f
- * Note that this is not in line with ECMA-48 which does not limit either of those.
- * Furthermore ECMA-48 allows the prefix byte range at any param byte position. Currently
- * there are no known sequences that follow the broader definition of the specification.
- *
- * TODO: implement error recovery hook via error handler return values
- */
-export class EscapeSequenceParser extends Disposable implements IEscapeSequenceParser {
- public initialState: number;
- public currentState: number;
- public precedingCodepoint: number;
-
- // buffers over several parse calls
- protected _params: Params;
- protected _collect: number;
-
- // handler lookup containers
- protected _printHandler: PrintHandlerType;
- protected _executeHandlers: {[flag: number]: ExecuteHandlerType};
- protected _csiHandlers: IHandlerCollection<CsiHandlerType>;
- protected _escHandlers: IHandlerCollection<EscHandlerType>;
- protected _oscParser: IOscParser;
- protected _dcsParser: IDcsParser;
- protected _errorHandler: (state: IParsingState) => IParsingState;
-
- // fallback handlers
- protected _printHandlerFb: PrintFallbackHandlerType;
- protected _executeHandlerFb: ExecuteFallbackHandlerType;
- protected _csiHandlerFb: CsiFallbackHandlerType;
- protected _escHandlerFb: EscFallbackHandlerType;
- protected _errorHandlerFb: (state: IParsingState) => IParsingState;
-
- constructor(readonly TRANSITIONS: TransitionTable = VT500_TRANSITION_TABLE) {
- super();
-
- this.initialState = ParserState.GROUND;
- this.currentState = this.initialState;
- this._params = new Params(); // defaults to 32 storable params/subparams
- this._params.addParam(0); // ZDM
- this._collect = 0;
- this.precedingCodepoint = 0;
-
- // set default fallback handlers and handler lookup containers
- this._printHandlerFb = (data, start, end): void => { };
- this._executeHandlerFb = (code: number): void => { };
- this._csiHandlerFb = (ident: number, params: IParams): void => { };
- this._escHandlerFb = (ident: number): void => { };
- this._errorHandlerFb = (state: IParsingState): IParsingState => state;
- this._printHandler = this._printHandlerFb;
- this._executeHandlers = Object.create(null);
- this._csiHandlers = Object.create(null);
- this._escHandlers = Object.create(null);
- this._oscParser = new OscParser();
- this._dcsParser = new DcsParser();
- this._errorHandler = this._errorHandlerFb;
-
- // swallow 7bit ST (ESC+\)
- this.setEscHandler({final: '\\'}, () => {});
- }
-
- protected _identifier(id: IFunctionIdentifier, finalRange: number[] = [0x40, 0x7e]): number {
- let res = 0;
- if (id.prefix) {
- if (id.prefix.length > 1) {
- throw new Error('only one byte as prefix supported');
- }
- res = id.prefix.charCodeAt(0);
- if (res && 0x3c > res || res > 0x3f) {
- throw new Error('prefix must be in range 0x3c .. 0x3f');
- }
- }
- if (id.intermediates) {
- if (id.intermediates.length > 2) {
- throw new Error('only two bytes as intermediates are supported');
- }
- for (let i = 0; i < id.intermediates.length; ++i) {
- const intermediate = id.intermediates.charCodeAt(i);
- if (0x20 > intermediate || intermediate > 0x2f) {
- throw new Error('intermediate must be in range 0x20 .. 0x2f');
- }
- res <<= 8;
- res |= intermediate;
- }
- }
- if (id.final.length !== 1) {
- throw new Error('final must be a single byte');
- }
- const finalCode = id.final.charCodeAt(0);
- if (finalRange[0] > finalCode || finalCode > finalRange[1]) {
- throw new Error(`final must be in range ${finalRange[0]} .. ${finalRange[1]}`);
- }
- res <<= 8;
- res |= finalCode;
-
- return res;
- }
-
- public identToString(ident: number): string {
- const res: string[] = [];
- while (ident) {
- res.push(String.fromCharCode(ident & 0xFF));
- ident >>= 8;
- }
- return res.reverse().join('');
- }
-
- public dispose(): void {
- this._csiHandlers = Object.create(null);
- this._executeHandlers = Object.create(null);
- this._escHandlers = Object.create(null);
- this._oscParser.dispose();
- this._dcsParser.dispose();
- }
-
- public setPrintHandler(handler: PrintHandlerType): void {
- this._printHandler = handler;
- }
- public clearPrintHandler(): void {
- this._printHandler = this._printHandlerFb;
- }
-
- public addEscHandler(id: IFunctionIdentifier, handler: EscHandlerType): IDisposable {
- const ident = this._identifier(id, [0x30, 0x7e]);
- if (this._escHandlers[ident] === undefined) {
- this._escHandlers[ident] = [];
- }
- const handlerList = this._escHandlers[ident];
- handlerList.push(handler);
- return {
- dispose: () => {
- const handlerIndex = handlerList.indexOf(handler);
- if (handlerIndex !== -1) {
- handlerList.splice(handlerIndex, 1);
- }
- }
- };
- }
- public setEscHandler(id: IFunctionIdentifier, handler: EscHandlerType): void {
- this._escHandlers[this._identifier(id, [0x30, 0x7e])] = [handler];
- }
- public clearEscHandler(id: IFunctionIdentifier): void {
- if (this._escHandlers[this._identifier(id, [0x30, 0x7e])]) delete this._escHandlers[this._identifier(id, [0x30, 0x7e])];
- }
- public setEscHandlerFallback(handler: EscFallbackHandlerType): void {
- this._escHandlerFb = handler;
- }
-
- public setExecuteHandler(flag: string, handler: ExecuteHandlerType): void {
- this._executeHandlers[flag.charCodeAt(0)] = handler;
- }
- public clearExecuteHandler(flag: string): void {
- if (this._executeHandlers[flag.charCodeAt(0)]) delete this._executeHandlers[flag.charCodeAt(0)];
- }
- public setExecuteHandlerFallback(handler: ExecuteFallbackHandlerType): void {
- this._executeHandlerFb = handler;
- }
-
- public addCsiHandler(id: IFunctionIdentifier, handler: CsiHandlerType): IDisposable {
- const ident = this._identifier(id);
- if (this._csiHandlers[ident] === undefined) {
- this._csiHandlers[ident] = [];
- }
- const handlerList = this._csiHandlers[ident];
- handlerList.push(handler);
- return {
- dispose: () => {
- const handlerIndex = handlerList.indexOf(handler);
- if (handlerIndex !== -1) {
- handlerList.splice(handlerIndex, 1);
- }
- }
- };
- }
- public setCsiHandler(id: IFunctionIdentifier, handler: CsiHandlerType): void {
- this._csiHandlers[this._identifier(id)] = [handler];
- }
- public clearCsiHandler(id: IFunctionIdentifier): void {
- if (this._csiHandlers[this._identifier(id)]) delete this._csiHandlers[this._identifier(id)];
- }
- public setCsiHandlerFallback(callback: (ident: number, params: IParams) => void): void {
- this._csiHandlerFb = callback;
- }
-
- public addDcsHandler(id: IFunctionIdentifier, handler: IDcsHandler): IDisposable {
- return this._dcsParser.addHandler(this._identifier(id), handler);
- }
- public setDcsHandler(id: IFunctionIdentifier, handler: IDcsHandler): void {
- this._dcsParser.setHandler(this._identifier(id), handler);
- }
- public clearDcsHandler(id: IFunctionIdentifier): void {
- this._dcsParser.clearHandler(this._identifier(id));
- }
- public setDcsHandlerFallback(handler: DcsFallbackHandlerType): void {
- this._dcsParser.setHandlerFallback(handler);
- }
-
- public addOscHandler(ident: number, handler: IOscHandler): IDisposable {
- return this._oscParser.addHandler(ident, handler);
- }
- public setOscHandler(ident: number, handler: IOscHandler): void {
- this._oscParser.setHandler(ident, handler);
- }
- public clearOscHandler(ident: number): void {
- this._oscParser.clearHandler(ident);
- }
- public setOscHandlerFallback(handler: OscFallbackHandlerType): void {
- this._oscParser.setHandlerFallback(handler);
- }
-
- public setErrorHandler(callback: (state: IParsingState) => IParsingState): void {
- this._errorHandler = callback;
- }
- public clearErrorHandler(): void {
- this._errorHandler = this._errorHandlerFb;
- }
-
- public reset(): void {
- this.currentState = this.initialState;
- this._oscParser.reset();
- this._dcsParser.reset();
- this._params.reset();
- this._params.addParam(0); // ZDM
- this._collect = 0;
- this.precedingCodepoint = 0;
- }
-
-
-
- /**
- * Parse UTF32 codepoints in `data` up to `length`.
- *
- * Note: For several actions with high data load the parsing is optimized
- * by using local read ahead loops with hardcoded conditions to
- * avoid costly table lookups. Make sure that any change of table values
- * will be reflected in the loop conditions as well and vice versa.
- * Affected states/actions:
- * - GROUND:PRINT
- * - CSI_PARAM:PARAM
- * - DCS_PARAM:PARAM
- * - OSC_STRING:OSC_PUT
- * - DCS_PASSTHROUGH:DCS_PUT
- */
- public parse(data: Uint32Array, length: number): void {
- let code = 0;
- let transition = 0;
- let currentState = this.currentState;
- const osc = this._oscParser;
- const dcs = this._dcsParser;
- let collect = this._collect;
- const params = this._params;
- const table: Uint8Array = this.TRANSITIONS.table;
-
- // process input string
- for (let i = 0; i < length; ++i) {
- code = data[i];
-
- // normal transition & action lookup
- transition = table[currentState << TableAccess.INDEX_STATE_SHIFT | (code < 0xa0 ? code : NON_ASCII_PRINTABLE)];
- switch (transition >> TableAccess.TRANSITION_ACTION_SHIFT) {
- case ParserAction.PRINT:
- // read ahead with loop unrolling
- // Note: 0x20 (SP) is included, 0x7F (DEL) is excluded
- for (let j = i + 1; ; ++j) {
- if (j >= length || (code = data[j]) < 0x20 || (code > 0x7e && code < NON_ASCII_PRINTABLE)) {
- this._printHandler(data, i, j);
- i = j - 1;
- break;
- }
- if (++j >= length || (code = data[j]) < 0x20 || (code > 0x7e && code < NON_ASCII_PRINTABLE)) {
- this._printHandler(data, i, j);
- i = j - 1;
- break;
- }
- if (++j >= length || (code = data[j]) < 0x20 || (code > 0x7e && code < NON_ASCII_PRINTABLE)) {
- this._printHandler(data, i, j);
- i = j - 1;
- break;
- }
- if (++j >= length || (code = data[j]) < 0x20 || (code > 0x7e && code < NON_ASCII_PRINTABLE)) {
- this._printHandler(data, i, j);
- i = j - 1;
- break;
- }
- }
- break;
- case ParserAction.EXECUTE:
- if (this._executeHandlers[code]) this._executeHandlers[code]();
- else this._executeHandlerFb(code);
- this.precedingCodepoint = 0;
- break;
- case ParserAction.IGNORE:
- break;
- case ParserAction.ERROR:
- const inject: IParsingState = this._errorHandler(
- {
- position: i,
- code,
- currentState,
- collect,
- params,
- abort: false
- });
- if (inject.abort) return;
- // inject values: currently not implemented
- break;
- case ParserAction.CSI_DISPATCH:
- // Trigger CSI Handler
- const handlers = this._csiHandlers[collect << 8 | code];
- let j = handlers ? handlers.length - 1 : -1;
- for (; j >= 0; j--) {
- // undefined or true means success and to stop bubbling
- if (handlers[j](params) !== false) {
- break;
- }
- }
- if (j < 0) {
- this._csiHandlerFb(collect << 8 | code, params);
- }
- this.precedingCodepoint = 0;
- break;
- case ParserAction.PARAM:
- // inner loop: digits (0x30 - 0x39) and ; (0x3b) and : (0x3a)
- do {
- switch (code) {
- case 0x3b:
- params.addParam(0); // ZDM
- break;
- case 0x3a:
- params.addSubParam(-1);
- break;
- default: // 0x30 - 0x39
- params.addDigit(code - 48);
- }
- } while (++i < length && (code = data[i]) > 0x2f && code < 0x3c);
- i--;
- break;
- case ParserAction.COLLECT:
- collect <<= 8;
- collect |= code;
- break;
- case ParserAction.ESC_DISPATCH:
- const handlersEsc = this._escHandlers[collect << 8 | code];
- let jj = handlersEsc ? handlersEsc.length - 1 : -1;
- for (; jj >= 0; jj--) {
- // undefined or true means success and to stop bubbling
- if (handlersEsc[jj]() !== false) {
- break;
- }
- }
- if (jj < 0) {
- this._escHandlerFb(collect << 8 | code);
- }
- this.precedingCodepoint = 0;
- break;
- case ParserAction.CLEAR:
- params.reset();
- params.addParam(0); // ZDM
- collect = 0;
- break;
- case ParserAction.DCS_HOOK:
- dcs.hook(collect << 8 | code, params);
- break;
- case ParserAction.DCS_PUT:
- // inner loop - exit DCS_PUT: 0x18, 0x1a, 0x1b, 0x7f, 0x80 - 0x9f
- // unhook triggered by: 0x1b, 0x9c (success) and 0x18, 0x1a (abort)
- for (let j = i + 1; ; ++j) {
- if (j >= length || (code = data[j]) === 0x18 || code === 0x1a || code === 0x1b || (code > 0x7f && code < NON_ASCII_PRINTABLE)) {
- dcs.put(data, i, j);
- i = j - 1;
- break;
- }
- }
- break;
- case ParserAction.DCS_UNHOOK:
- dcs.unhook(code !== 0x18 && code !== 0x1a);
- if (code === 0x1b) transition |= ParserState.ESCAPE;
- params.reset();
- params.addParam(0); // ZDM
- collect = 0;
- this.precedingCodepoint = 0;
- break;
- case ParserAction.OSC_START:
- osc.start();
- break;
- case ParserAction.OSC_PUT:
- // inner loop: 0x20 (SP) included, 0x7F (DEL) included
- for (let j = i + 1; ; j++) {
- if (j >= length || (code = data[j]) < 0x20 || (code > 0x7f && code <= 0x9f)) {
- osc.put(data, i, j);
- i = j - 1;
- break;
- }
- }
- break;
- case ParserAction.OSC_END:
- osc.end(code !== 0x18 && code !== 0x1a);
- if (code === 0x1b) transition |= ParserState.ESCAPE;
- params.reset();
- params.addParam(0); // ZDM
- collect = 0;
- this.precedingCodepoint = 0;
- break;
- }
- currentState = transition & TableAccess.TRANSITION_STATE_MASK;
- }
-
- // save collected intermediates
- this._collect = collect;
-
- // save state
- this.currentState = currentState;
- }
-}
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