Parser.js•2.6 kB
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Parser = void 0;
const Scanner_1 = require("./Scanner");
const RowParser_1 = require("./RowParser");
const Token_1 = require("./Token");
class Parser {
constructor(parserOptions) {
this.parserOptions = parserOptions;
this.rowParser = new RowParser_1.RowParser(this.parserOptions);
}
static removeBOM(line) {
// Catches EFBBBF (UTF-8 BOM) because the buffer-to-string
// conversion translates it to FEFF (UTF-16 BOM)
if (line && line.charCodeAt(0) === 0xfeff) {
return line.slice(1);
}
return line;
}
parse(line, hasMoreData) {
const scanner = new Scanner_1.Scanner({
line: Parser.removeBOM(line),
parserOptions: this.parserOptions,
hasMoreData,
});
if (this.parserOptions.supportsComments) {
return this.parseWithComments(scanner);
}
return this.parseWithoutComments(scanner);
}
parseWithoutComments(scanner) {
const rows = [];
let shouldContinue = true;
while (shouldContinue) {
shouldContinue = this.parseRow(scanner, rows);
}
return { line: scanner.line, rows };
}
parseWithComments(scanner) {
const { parserOptions } = this;
const rows = [];
for (let nextToken = scanner.nextCharacterToken; nextToken !== null; nextToken = scanner.nextCharacterToken) {
if (Token_1.Token.isTokenComment(nextToken, parserOptions)) {
const cursor = scanner.advancePastLine();
if (cursor === null) {
return { line: scanner.lineFromCursor, rows };
}
if (!scanner.hasMoreCharacters) {
return { line: scanner.lineFromCursor, rows };
}
scanner.truncateToCursor();
}
else if (!this.parseRow(scanner, rows)) {
break;
}
}
return { line: scanner.line, rows };
}
parseRow(scanner, rows) {
const nextToken = scanner.nextNonSpaceToken;
if (!nextToken) {
return false;
}
const row = this.rowParser.parse(scanner);
if (row === null) {
return false;
}
if (this.parserOptions.ignoreEmpty && RowParser_1.RowParser.isEmptyRow(row)) {
return true;
}
rows.push(row);
return true;
}
}
exports.Parser = Parser;
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