58 lines
2 KiB
JavaScript
58 lines
2 KiB
JavaScript
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/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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'use strict';
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import * as scanner from './cssScanner';
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const _FSL = '/'.charCodeAt(0);
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const _NWL = '\n'.charCodeAt(0);
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const _CAR = '\r'.charCodeAt(0);
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const _LFD = '\f'.charCodeAt(0);
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const _TIC = '`'.charCodeAt(0);
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const _DOT = '.'.charCodeAt(0);
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let customTokenValue = scanner.TokenType.CustomToken;
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export const Ellipsis = customTokenValue++;
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export class LESSScanner extends scanner.Scanner {
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scanNext(offset) {
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// LESS: escaped JavaScript code `const a = "dddd"`
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const tokenType = this.escapedJavaScript();
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if (tokenType !== null) {
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return this.finishToken(offset, tokenType);
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}
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if (this.stream.advanceIfChars([_DOT, _DOT, _DOT])) {
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return this.finishToken(offset, Ellipsis);
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}
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return super.scanNext(offset);
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}
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comment() {
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if (super.comment()) {
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return true;
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}
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if (!this.inURL && this.stream.advanceIfChars([_FSL, _FSL])) {
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this.stream.advanceWhileChar((ch) => {
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switch (ch) {
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case _NWL:
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case _CAR:
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case _LFD:
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return false;
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default:
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return true;
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}
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});
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return true;
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}
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else {
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return false;
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}
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}
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escapedJavaScript() {
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const ch = this.stream.peekChar();
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if (ch === _TIC) {
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this.stream.advance(1);
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this.stream.advanceWhileChar((ch) => { return ch !== _TIC; });
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return this.stream.advanceIfChar(_TIC) ? scanner.TokenType.EscapedJavaScript : scanner.TokenType.BadEscapedJavaScript;
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}
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return null;
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}
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}
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