pdf-lib/es/core/pdf-parser/parseName.js

Library for creating and modifying PDF files in JavaScript

import { PDFName } from '../pdf-objects';
import { arrayToString, trimArrayAndRemoveComments } from '../../utils';
/**
 * Accepts an array of bytes as input. Checks to see if the first characters in the
 * trimmed input make up a PDF Name.
 *
 * If so, returns a tuple containing (1) an object representing the parsed PDF Name
 * and (2) a subarray of the input with the characters making up the parsed name
 * removed. The "onParseName" parse handler will also be called with the PDFName
 * object.
 *
 * If not, null is returned.
 */
var parseName = function (input, _a) {
    var onParseName = (_a === void 0 ? {} : _a).onParseName;
    var trimmed = trimArrayAndRemoveComments(input);
    var nameRegex = /^\/([^\0\t\n\f\r \][<>(/]*)/;
    // Search for first character that isn't part of a name
    var idx = 1; // Skip the leading '/'
    while (trimmed[idx] !== undefined &&
        String.fromCharCode(trimmed[idx]).match(/^[^\0\t\n\f\r \][<>(/]/)) {
        idx += 1;
    }
    // Try to match the regex up to that character to see if we've got a name
    var result = arrayToString(trimmed, 0, idx).match(nameRegex);
    if (!result)
        return undefined;
    var fullMatch = result[0], name = result[1];
    var pdfName = PDFName.fromEncoded(name);
    if (onParseName)
        onParseName(pdfName);
    return [pdfName, trimmed.subarray(fullMatch.length)];
};
export default parseName;