96 lines
3.4 KiB
JavaScript
96 lines
3.4 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 { TokenType, 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 _DLR = '$'.charCodeAt(0);
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const _HSH = '#'.charCodeAt(0);
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const _CUL = '{'.charCodeAt(0);
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const _EQS = '='.charCodeAt(0);
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const _BNG = '!'.charCodeAt(0);
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const _LAN = '<'.charCodeAt(0);
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const _RAN = '>'.charCodeAt(0);
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const _DOT = '.'.charCodeAt(0);
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const _ATS = '@'.charCodeAt(0);
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let customTokenValue = TokenType.CustomToken;
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export const VariableName = customTokenValue++;
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export const InterpolationFunction = customTokenValue++;
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export const Default = customTokenValue++;
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export const EqualsOperator = customTokenValue++;
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export const NotEqualsOperator = customTokenValue++;
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export const GreaterEqualsOperator = customTokenValue++;
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export const SmallerEqualsOperator = customTokenValue++;
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export const Ellipsis = customTokenValue++;
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export const Module = customTokenValue++;
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export class SCSSScanner extends Scanner {
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scanNext(offset) {
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// scss variable
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if (this.stream.advanceIfChar(_DLR)) {
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const content = ['$'];
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if (this.ident(content)) {
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return this.finishToken(offset, VariableName, content.join(''));
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}
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else {
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this.stream.goBackTo(offset);
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}
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}
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// scss: interpolation function #{..})
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if (this.stream.advanceIfChars([_HSH, _CUL])) {
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return this.finishToken(offset, InterpolationFunction);
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}
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// operator ==
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if (this.stream.advanceIfChars([_EQS, _EQS])) {
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return this.finishToken(offset, EqualsOperator);
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}
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// operator !=
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if (this.stream.advanceIfChars([_BNG, _EQS])) {
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return this.finishToken(offset, NotEqualsOperator);
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}
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// operators <, <=
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if (this.stream.advanceIfChar(_LAN)) {
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if (this.stream.advanceIfChar(_EQS)) {
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return this.finishToken(offset, SmallerEqualsOperator);
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}
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return this.finishToken(offset, TokenType.Delim);
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}
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// ooperators >, >=
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if (this.stream.advanceIfChar(_RAN)) {
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if (this.stream.advanceIfChar(_EQS)) {
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return this.finishToken(offset, GreaterEqualsOperator);
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}
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return this.finishToken(offset, TokenType.Delim);
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}
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// ellipis
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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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}
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