shady-css-parser
Version:
A fast, small and flexible CSS parser.
89 lines • 3.82 kB
JavaScript
;
/**
* @license
* Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
* This code may only be used under the BSD style license found at
* http://polymer.github.io/LICENSE.txt The complete set of authors may be found
* at http://polymer.github.io/AUTHORS.txt The complete set of contributors may
* be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by
* Google as part of the polymer project is also subject to an additional IP
* rights grant found at http://polymer.github.io/PATENTS.txt
*/
Object.defineProperty(exports, "__esModule", { value: true });
/**
* An enumeration of Token types.
*/
var TokenType;
(function (TokenType) {
TokenType[TokenType["none"] = 0] = "none";
TokenType[TokenType["whitespace"] = (Math.pow(2, 0))] = "whitespace";
TokenType[TokenType["string"] = (Math.pow(2, 1))] = "string";
TokenType[TokenType["comment"] = (Math.pow(2, 2))] = "comment";
TokenType[TokenType["word"] = (Math.pow(2, 3))] = "word";
TokenType[TokenType["boundary"] = (Math.pow(2, 4))] = "boundary";
TokenType[TokenType["propertyBoundary"] = (Math.pow(2, 5))] = "propertyBoundary";
// Special cases for boundary:
TokenType[TokenType["openParenthesis"] = (Math.pow(2, 6)) | TokenType.boundary] = "openParenthesis";
TokenType[TokenType["closeParenthesis"] = (Math.pow(2, 7)) | TokenType.boundary] = "closeParenthesis";
TokenType[TokenType["at"] = (Math.pow(2, 8)) | TokenType.boundary] = "at";
TokenType[TokenType["openBrace"] = (Math.pow(2, 9)) | TokenType.boundary] = "openBrace";
// [};] are property boundaries:
TokenType[TokenType["closeBrace"] = (Math.pow(2, 10)) | TokenType.propertyBoundary | TokenType.boundary] = "closeBrace";
TokenType[TokenType["semicolon"] = (Math.pow(2, 11)) | TokenType.propertyBoundary | TokenType.boundary] = "semicolon";
// : is a chimaeric abomination:
// foo:bar{}
// foo:bar;
TokenType[TokenType["colon"] = (Math.pow(2, 12)) | TokenType.boundary | TokenType.word] = "colon";
// TODO: are these two boundaries? I mean, sometimes they are I guess? Or
// maybe they shouldn't exist in the boundaryTokenTypes map.
TokenType[TokenType["hyphen"] = (Math.pow(2, 13))] = "hyphen";
TokenType[TokenType["underscore"] = (Math.pow(2, 14))] = "underscore";
})(TokenType = exports.TokenType || (exports.TokenType = {}));
/**
* Class that describes individual tokens as produced by the Tokenizer.
*/
class Token {
/**
* Create a Token instance.
* @param type The lexical type of the Token.
* @param start The start index of the text corresponding to the
* Token in the CSS text.
* @param end The end index of the text corresponding to the Token
* in the CSS text.
*/
constructor(type, start, end) {
this.type = type;
this.start = start;
this.end = end;
this.previous = null;
this.next = null;
}
/**
* Test if the Token matches a given numeric type. Types match if the bitwise
* AND of the Token's type and the argument type are equivalent to the
* argument type.
* @param type The numeric type to test for equivalency with the
* Token.
*/
is(type) {
return (this.type & type) === type;
}
}
Token.type = TokenType;
exports.Token = Token;
/**
* A mapping of boundary token text to their corresponding types.
*/
const boundaryTokenTypes = {
'(': Token.type.openParenthesis,
')': Token.type.closeParenthesis,
':': Token.type.colon,
'@': Token.type.at,
'{': Token.type.openBrace,
'}': Token.type.closeBrace,
';': Token.type.semicolon,
'-': Token.type.hyphen,
'_': Token.type.underscore
};
exports.boundaryTokenTypes = boundaryTokenTypes;
//# sourceMappingURL=token.js.map