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cleanup Types.ts, docs for ZDM

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This commit is contained in:
Jörg Breitbart
2019-07-04 13:50:03 +02:00
parent 6a691f2548
commit 5f8d07ac62
3 changed files with 31 additions and 16 deletions
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src/common/parser/EscapeSequenceParser.ts
+17 -8
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@@ -216,13 +216,22 @@ class DcsDummy implements IDcsHandler {
* 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` contructor argument and
* reimplement the `parse` method.
* NOTE: Other than the original parser from vt100.net this parser supports
* sub parameters in digital parameters separated by colons.
*
* 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 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.
*
* TODO: implement error recovery hook via error handler return values
*/
export class EscapeSequenceParser extends Disposable implements IEscapeSequenceParser {
@@ -261,7 +270,7 @@ export class EscapeSequenceParser extends Disposable implements IEscapeSequenceP
this.currentState = this.initialState;
this._osc = '';
this._params = new Params(); // defaults to 32 storable params/subparams
this._params.addParam(0);
this._params.addParam(0); // ZDM
this._collect = '';
this.precedingCodepoint = 0;
@@ -392,7 +401,7 @@ export class EscapeSequenceParser extends Disposable implements IEscapeSequenceP
this.currentState = this.initialState;
this._osc = '';
this._params.reset();
this._params.addParam(0);
this._params.addParam(0); // ZDM
this._collect = '';
this._activeDcsHandler = null;
this.precedingCodepoint = 0;
@@ -502,7 +511,7 @@ export class EscapeSequenceParser extends Disposable implements IEscapeSequenceP
do {
switch (code) {
case 0x3b:
params.addParam(0);
params.addParam(0); // ZDM
isSub = false;
break;
case 0x3a:
@@ -528,7 +537,7 @@ export class EscapeSequenceParser extends Disposable implements IEscapeSequenceP
case ParserAction.CLEAR:
osc = '';
params.reset();
params.addParam(0);
params.addParam(0); // ZDM
collect = '';
break;
case ParserAction.DCS_HOOK:
@@ -558,7 +567,7 @@ export class EscapeSequenceParser extends Disposable implements IEscapeSequenceP
if (code === 0x1b) transition |= ParserState.ESCAPE;
osc = '';
params.reset();
params.addParam(0);
params.addParam(0); // ZDM
collect = '';
break;
case ParserAction.OSC_START:
@@ -605,7 +614,7 @@ export class EscapeSequenceParser extends Disposable implements IEscapeSequenceP
if (code === 0x1b) transition |= ParserState.ESCAPE;
osc = '';
params.reset();
params.addParam(0);
params.addParam(0); // ZDM
collect = '';
break;
}