93 lines
3.6 KiB
JavaScript
93 lines
3.6 KiB
JavaScript
import { __awaiter, __generator } from "tslib";
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import PDFDocument from "./PDFDocument";
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import { PDFPageEmbedder, PDFRef } from "../core";
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import { assertIs } from "../utils";
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/**
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* Represents a PDF page that has been embedded in a [[PDFDocument]].
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*/
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var PDFEmbeddedPage = /** @class */ (function () {
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function PDFEmbeddedPage(ref, doc, embedder) {
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this.alreadyEmbedded = false;
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assertIs(ref, 'ref', [[PDFRef, 'PDFRef']]);
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assertIs(doc, 'doc', [[PDFDocument, 'PDFDocument']]);
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assertIs(embedder, 'embedder', [[PDFPageEmbedder, 'PDFPageEmbedder']]);
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this.ref = ref;
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this.doc = doc;
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this.width = embedder.width;
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this.height = embedder.height;
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this.embedder = embedder;
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}
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/**
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* Compute the width and height of this page after being scaled by the
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* given `factor`. For example:
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* ```js
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* embeddedPage.width // => 500
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* embeddedPage.height // => 250
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*
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* const scaled = embeddedPage.scale(0.5)
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* scaled.width // => 250
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* scaled.height // => 125
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* ```
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* This operation is often useful before drawing a page with
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* [[PDFPage.drawPage]] to compute the `width` and `height` options.
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* @param factor The factor by which this page should be scaled.
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* @returns The width and height of the page after being scaled.
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*/
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PDFEmbeddedPage.prototype.scale = function (factor) {
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assertIs(factor, 'factor', ['number']);
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return { width: this.width * factor, height: this.height * factor };
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};
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/**
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* Get the width and height of this page. For example:
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* ```js
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* const { width, height } = embeddedPage.size()
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* ```
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* @returns The width and height of the page.
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*/
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PDFEmbeddedPage.prototype.size = function () {
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return this.scale(1);
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};
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/**
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* > **NOTE:** You probably don't need to call this method directly. The
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* > [[PDFDocument.save]] and [[PDFDocument.saveAsBase64]] methods will
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* > automatically ensure all embeddable pages get embedded.
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*
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* Embed this embeddable page in its document.
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*
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* @returns Resolves when the embedding is complete.
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*/
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PDFEmbeddedPage.prototype.embed = function () {
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return __awaiter(this, void 0, void 0, function () {
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return __generator(this, function (_a) {
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switch (_a.label) {
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case 0:
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if (!!this.alreadyEmbedded) return [3 /*break*/, 2];
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return [4 /*yield*/, this.embedder.embedIntoContext(this.doc.context, this.ref)];
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case 1:
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_a.sent();
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this.alreadyEmbedded = true;
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_a.label = 2;
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case 2: return [2 /*return*/];
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}
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});
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});
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};
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/**
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* > **NOTE:** You probably don't want to call this method directly. Instead,
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* > consider using the [[PDFDocument.embedPdf]] and
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* > [[PDFDocument.embedPage]] methods, which will create instances of
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* > [[PDFEmbeddedPage]] for you.
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*
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* Create an instance of [[PDFEmbeddedPage]] from an existing ref and embedder
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*
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* @param ref The unique reference for this embedded page.
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* @param doc The document to which the embedded page will belong.
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* @param embedder The embedder that will be used to embed the page.
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*/
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PDFEmbeddedPage.of = function (ref, doc, embedder) {
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return new PDFEmbeddedPage(ref, doc, embedder);
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};
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return PDFEmbeddedPage;
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}());
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export default PDFEmbeddedPage;
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//# sourceMappingURL=PDFEmbeddedPage.js.map
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