pdf-lib
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Create and modify PDF files with JavaScript
71 lines • 3.23 kB
JavaScript
import { __awaiter, __generator } from "tslib";
import { PDFName, PDFArray, PDFDict, PDFHexString } from "../core";
/**
* Represents JavaScript that has been embedded in a [[PDFDocument]].
*/
var PDFJavaScript = /** @class */ (function () {
function PDFJavaScript(ref, doc, embedder) {
this.alreadyEmbedded = false;
this.ref = ref;
this.doc = doc;
this.embedder = embedder;
}
/**
* > **NOTE:** You probably don't need to call this method directly. The
* > [[PDFDocument.save]] and [[PDFDocument.saveAsBase64]] methods will
* > automatically ensure all JavaScripts get embedded.
*
* Embed this JavaScript in its document.
*
* @returns Resolves when the embedding is complete.
*/
PDFJavaScript.prototype.embed = function () {
return __awaiter(this, void 0, void 0, function () {
var _a, catalog, context, ref, Names, Javascript, JSNames;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
if (!!this.alreadyEmbedded) return [3 /*break*/, 2];
_a = this.doc, catalog = _a.catalog, context = _a.context;
return [4 /*yield*/, this.embedder.embedIntoContext(this.doc.context, this.ref)];
case 1:
ref = _b.sent();
if (!catalog.has(PDFName.of('Names'))) {
catalog.set(PDFName.of('Names'), context.obj({}));
}
Names = catalog.lookup(PDFName.of('Names'), PDFDict);
if (!Names.has(PDFName.of('JavaScript'))) {
Names.set(PDFName.of('JavaScript'), context.obj({}));
}
Javascript = Names.lookup(PDFName.of('JavaScript'), PDFDict);
if (!Javascript.has(PDFName.of('Names'))) {
Javascript.set(PDFName.of('Names'), context.obj([]));
}
JSNames = Javascript.lookup(PDFName.of('Names'), PDFArray);
JSNames.push(PDFHexString.fromText(this.embedder.scriptName));
JSNames.push(ref);
this.alreadyEmbedded = true;
_b.label = 2;
case 2: return [2 /*return*/];
}
});
});
};
/**
* > **NOTE:** You probably don't want to call this method directly. Instead,
* > consider using the [[PDFDocument.addJavaScript]] method, which will
* create instances of [[PDFJavaScript]] for you.
*
* Create an instance of [[PDFJavaScript]] from an existing ref and script
*
* @param ref The unique reference for this script.
* @param doc The document to which the script will belong.
* @param embedder The embedder that will be used to embed the script.
*/
PDFJavaScript.of = function (ref, doc, embedder) {
return new PDFJavaScript(ref, doc, embedder);
};
return PDFJavaScript;
}());
export default PDFJavaScript;
//# sourceMappingURL=PDFJavaScript.js.map