@pdfme/pdf-lib/dist/node/src/core/parser/PDFObjectStreamParser.js

Create and modify PDF files with JavaScript

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const errors_1 = require("../errors");
const PDFName_1 = __importDefault(require("../objects/PDFName"));
const PDFNumber_1 = __importDefault(require("../objects/PDFNumber"));
const PDFRef_1 = __importDefault(require("../objects/PDFRef"));
const ByteStream_1 = __importDefault(require("./ByteStream"));
const PDFObjectParser_1 = __importDefault(require("./PDFObjectParser"));
const utils_1 = require("../../utils");
class PDFObjectStreamParser extends PDFObjectParser_1.default {
    constructor(rawStream, shouldWaitForTick) {
        super(ByteStream_1.default.fromPDFRawStream(rawStream), rawStream.dict.context);
        Object.defineProperty(this, "alreadyParsed", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: void 0
        });
        Object.defineProperty(this, "shouldWaitForTick", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: void 0
        });
        Object.defineProperty(this, "firstOffset", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: void 0
        });
        Object.defineProperty(this, "objectCount", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: void 0
        });
        const { dict } = rawStream;
        this.alreadyParsed = false;
        this.shouldWaitForTick = shouldWaitForTick || (() => false);
        this.firstOffset = dict.lookup(PDFName_1.default.of('First'), PDFNumber_1.default).asNumber();
        this.objectCount = dict.lookup(PDFName_1.default.of('N'), PDFNumber_1.default).asNumber();
    }
    async parseIntoContext() {
        if (this.alreadyParsed) {
            throw new errors_1.ReparseError('PDFObjectStreamParser', 'parseIntoContext');
        }
        this.alreadyParsed = true;
        const offsetsAndObjectNumbers = this.parseOffsetsAndObjectNumbers();
        for (let idx = 0, len = offsetsAndObjectNumbers.length; idx < len; idx++) {
            const { objectNumber, offset } = offsetsAndObjectNumbers[idx];
            this.bytes.moveTo(this.firstOffset + offset);
            const ref = PDFRef_1.default.of(objectNumber, 0);
            const object = this.parseObject(ref);
            this.context.assign(ref, object);
            if (this.shouldWaitForTick())
                await (0, utils_1.waitForTick)();
        }
    }
    parseOffsetsAndObjectNumbers() {
        const offsetsAndObjectNumbers = [];
        for (let idx = 0, len = this.objectCount; idx < len; idx++) {
            this.skipWhitespaceAndComments();
            const objectNumber = this.parseRawInt();
            this.skipWhitespaceAndComments();
            const offset = this.parseRawInt();
            offsetsAndObjectNumbers.push({ objectNumber, offset });
        }
        return offsetsAndObjectNumbers;
    }
}
Object.defineProperty(PDFObjectStreamParser, "forStream", {
    enumerable: true,
    configurable: true,
    writable: true,
    value: (rawStream, shouldWaitForTick) => new PDFObjectStreamParser(rawStream, shouldWaitForTick)
});
exports.default = PDFObjectStreamParser;
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