waveterm/xterm.js
0
0
Fork 0
mirror of https://github.com/wavetermdev/xterm.js.git synced 2026-08-05 13:43:48 -07:00
Code Issues Packages Projects Releases Wiki Activity

use fill for default transition; create r from blueprint

Browse Source
This commit is contained in:
Jörg Breitbart
2019-06-03 00:11:25 +02:00
parent 9bd7c49003
commit 4f412cb6b0
1 changed files with 30 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/core/parser/EscapeSequenceParser.ts
+30 -34
View File
@@ -7,6 +7,7 @@ import { ParserState, ParserAction, IParsingState, IDcsHandler, IEscapeSequenceP
import { Disposable } from 'common/Lifecycle';
import { utf32ToString } from 'core/input/TextDecoder';
import { IDisposable } from 'common/Types';
import { fill } from 'common/TypedArrayUtils';
interface IHandlerCollection<T> {
[key: string]: T[];
@@ -15,19 +16,6 @@ interface IHandlerCollection<T> {
type CsiHandler = (params: number[], collect: string) => boolean | void;
type OscHandler = (data: string) => boolean | void;
/**
* Returns an array filled with numbers between the low and high parameters (right exclusive).
* @param low The low number.
* @param high The high number.
*/
function r(low: number, high: number): number[] {
let c = high - low;
const arr = new Array(c);
while (c--) {
arr[c] = --high;
}
return arr;
}
/**
* Transition table for EscapeSequenceParser.
@@ -35,12 +23,21 @@ function r(low: number, high: number): number[] {
* currentState << 8 | characterCode --> action << 4 | nextState
*/
export class TransitionTable {
public table: Uint8Array | number[];
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 << 4 | next);
}
/**
* Add a transition to the transition table.
* @param code input character code
@@ -48,8 +45,8 @@ export class TransitionTable {
* @param action parser action to be done
* @param next next parser state
*/
add(code: number, state: ParserState, action: ParserAction, next: ParserState): void {
this.table[state << 8 | code] = (action << 4) | next;
public add(code: number, state: ParserState, action: ParserAction, next: ParserState): void {
this.table[state << 8 | code] = action << 4 | next;
}
/**
@@ -59,24 +56,18 @@ export class TransitionTable {
* @param action parser action to be done
* @param next next parser state
*/
addMany(codes: number[], state: ParserState, action: ParserAction, next: ParserState): void {
public addMany(codes: number[], state: ParserState, action: ParserAction, next: ParserState): void {
for (let i = 0; i < codes.length; i++) {
this.add(codes[i], state, action, next);
this.table[state << 8 | codes[i]] = action << 4 | next;
}
}
}
/**
* Default definitions for the VT500_TRANSITION_TABLE.
*/
const PRINTABLES = r(0x20, 0x7f);
const EXECUTABLES = r(0x00, 0x18);
EXECUTABLES.push(0x19);
EXECUTABLES.push.apply(EXECUTABLES, r(0x1c, 0x20));
// Pseudo-character placeholder for printable non-ascii characters.
// 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.
@@ -84,16 +75,21 @@ const NON_ASCII_PRINTABLE = 0xA0;
export const VT500_TRANSITION_TABLE = (function (): TransitionTable {
const table: TransitionTable = new TransitionTable(4095);
// range macro
const blueprint = Array.apply(null, Array(256)).map((unused: any, i: number) => i);
const r = (start: number, end: number) => blueprint.slice(start, end);
// Default definitions.
const PRINTABLES = r(0x20, 0x7f);
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;
// table with default transition
for (state in states) {
// NOTE: table lookup is capped at 0xa0 in parse to keep the table small
for (let code = 0; code <= NON_ASCII_PRINTABLE; ++code) {
table.add(code, state, ParserAction.ERROR, ParserState.GROUND);
}
}
// set default transition
table.setDefault(ParserAction.ERROR, ParserState.GROUND);
// printables
table.addMany(PRINTABLES, ParserState.GROUND, ParserAction.PRINT, ParserState.GROUND);
// global anywhere rules
@@ -396,7 +392,7 @@ export class EscapeSequenceParser extends Disposable implements IEscapeSequenceP
let osc = this._osc;
let collect = this._collect;
let params = this._params;
const table: Uint8Array | number[] = this.TRANSITIONS.table;
const table: Uint8Array = this.TRANSITIONS.table;
let dcsHandler: IDcsHandler | null = this._activeDcsHandler;
let callback: Function | null = null;