Kilian Schuettler
20b6e32907
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* ranges passed through * updates possible
67 lines
1.9 KiB
JavaScript
67 lines
1.9 KiB
JavaScript
import fs from "fs";
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import { getDocument } from "../../build/dist/build/pdf.mjs";
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// Some PDFs need external cmaps.
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const CMAP_URL = "../../../node_modules/pdfjs-dist/cmaps/";
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const CMAP_PACKED = true;
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// Where the standard fonts are located.
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const STANDARD_FONT_DATA_URL =
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"../../../node_modules/pdfjs-dist/standard_fonts/";
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// Loading file from file system into typed array.
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const pdfPath =
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process.argv[2] || "C:\\Users\\kj131\\pdf-forge\\test_pdfs\\ISO_32000-2_2020(en).pdf";
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const data = new Uint8Array(fs.readFileSync(pdfPath));
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// Load the PDF file.
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const loadingTask = getDocument({
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data,
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cMapUrl: CMAP_URL,
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cMapPacked: CMAP_PACKED,
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standardFontDataUrl: STANDARD_FONT_DATA_URL,
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});
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test(loadingTask);
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async function test(loading) {
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try {
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const pdfDocument = await loading.promise;
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console.log("# PDF document loaded.");
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const page = await pdfDocument.getPage(4);
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printOpList(page);
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console.time("contents");
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const contents = await page.getContents();
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console.timeEnd("contents");
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console.time("oplist");
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const opList = await page.getOperatorList();
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console.timeEnd("oplist");
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// console.log(opList);
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let newContents = "";
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for (let i = 0; i < 5; i++) {
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const range = opList.rangeArray[i];
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if (range) {
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newContents += contents.slice(range[0], range[1]);
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newContents += "\n";
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}
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}
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console.log(newContents);
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await page.updateContents(newContents);
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await printOpList(page);
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} catch (e) {
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console.error(e);
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}
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}
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async function printOpList(page) {
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const contents = await page.getContents();
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const opList = await page.getOperatorList();
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// console.log(opList);
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const ops = [];
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for (let i = 0; i < opList.rangeArray.length; i++) {
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const range = opList.rangeArray[i];
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if (range) {
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ops.push(contents.slice(range[0], range[1]));
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}
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}
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console.log(ops.slice(0, 100));
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}
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