printmaker/dist/pdf-annotations.js

Generate PDF documents and from JavaScript objects

import { PDFName, PDFString } from 'pdf-lib';
export function createLinkAnnotation(page, box, uri) {
    const annots = getOrCreate(page.node, 'Annots', () => []);
    const annot = page.doc.context.obj(Object.assign(Object.assign({ Type: 'Annot', Subtype: 'Link', Rect: [box.x, box.y, box.x + box.width, box.y + box.height] }, (uri.startsWith('#')
        ? { A: { Type: 'Action', S: 'GoTo', D: PDFString.of(uri.slice(1)) } }
        : { A: { Type: 'Action', S: 'URI', URI: PDFString.of(uri) } })), { C: page.doc.context.obj([]), F: 0 }));
    annots.push(page.doc.context.register(annot));
}
export function createNamedDest(page, name, pos) {
    const names = getOrCreate(page.doc.catalog, 'Names', () => ({}));
    const dests = getOrCreate(names, 'Dests', () => ({}));
    const destNames = getOrCreate(dests, 'Names', () => []);
    for (let i = 0; i < destNames.size(); i += 2) {
        if (destNames.get(i).asString() === name) {
            throw new Error(`Duplicate id ${name}`);
        }
    }
    destNames.push(PDFString.of(name));
    destNames.push(page.doc.context.obj([page.ref, 'XYZ', pos.x, pos.y, null]));
}
function getOrCreate(dict, name, creatorFn) {
    if (!dict.has(PDFName.of(name))) {
        dict.set(PDFName.of(name), dict.context.obj(creatorFn()));
    }
    return dict.get(PDFName.of(name));
}
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