@pdfme/pdf-lib
Version:
Create and modify PDF files with JavaScript
47 lines • 1.72 kB
JavaScript
import PDFField from './PDFField';
import { PDFAcroSignature } from '../../core';
import { assertIs } from '../../utils';
/**
* Represents a signature field of a [[PDFForm]].
*
* [[PDFSignature]] fields are digital signatures. `pdf-lib` does not
* currently provide any specialized APIs for creating digital signatures or
* reading the contents of existing digital signatures.
*/
class PDFSignature extends PDFField {
constructor(acroSignature, ref, doc) {
super(acroSignature, ref, doc);
/** The low-level PDFAcroSignature wrapped by this signature. */
Object.defineProperty(this, "acroField", {
enumerable: true,
configurable: true,
writable: true,
value: void 0
});
assertIs(acroSignature, 'acroSignature', [[PDFAcroSignature, 'PDFAcroSignature']]);
this.acroField = acroSignature;
}
needsAppearancesUpdate() {
return false;
}
}
/**
* > **NOTE:** You probably don't want to call this method directly. Instead,
* > consider using the [[PDFForm.getSignature]] method, which will create an
* > instance of [[PDFSignature]] for you.
*
* Create an instance of [[PDFSignature]] from an existing acroSignature and
* ref
*
* @param acroSignature The underlying `PDFAcroSignature` for this signature.
* @param ref The unique reference for this signature.
* @param doc The document to which this signature will belong.
*/
Object.defineProperty(PDFSignature, "of", {
enumerable: true,
configurable: true,
writable: true,
value: (acroSignature, ref, doc) => new PDFSignature(acroSignature, ref, doc)
});
export default PDFSignature;
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