mirror of
https://github.com/HeyPuter/puter
synced 2024-11-15 06:15:47 +00:00
81 lines
2.3 KiB
JavaScript
81 lines
2.3 KiB
JavaScript
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/*
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* Copyright (C) 2024 Puter Technologies Inc.
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*
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* This file is part of Phoenix Shell.
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*
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* Phoenix Shell is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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const decoder = new TextDecoder();
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export class MergeWhitespacePStratumImpl {
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static meta = {
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inputs: 'node',
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outputs: 'node',
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}
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constructor (tabWidth) {
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this.tabWidth = tabWidth ?? 1;
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this.line = 0;
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this.col = 0;
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}
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countChar (c) {
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if ( c === '\n' ) {
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this.line++;
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this.col = 0;
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return;
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}
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if ( c === '\t' ) {
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this.col += this.tabWidth;
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return;
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}
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if ( c === '\r' ) return;
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this.col++;
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}
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next (api) {
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const lexer = api.delegate;
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for ( ;; ) {
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const { value, done } = lexer.next();
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if ( done ) return { value, done };
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if ( value.$ === 'whitespace' ) {
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for ( const c of value.text ) {
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this.countChar(c);
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}
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return { value, done: false };
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// continue;
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}
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value.$cst = {
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...(value.$cst ?? {}),
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line: this.line,
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col: this.col,
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};
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if ( value.hasOwnProperty('$source') ) {
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let source = value.$source;
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if ( source instanceof Uint8Array ) {
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source = decoder.decode(source);
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}
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for ( let c of source ) {
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this.countChar(c);
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}
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} else {
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console.warn('source missing; can\'t count position');
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}
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return { value, done: false };
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}
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}
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}
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