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Merge pull request #15043 from Snuffleupagus/PrintAnnotationStorage

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[api-minor] Introduce a `PrintAnnotationStorage` with *frozen* serializable data
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Jonas Jenwald 2022-06-24 09:30:07 +02:00 • committed by GitHub
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6 changed files with 196 additions and 41 deletions
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70
test/unit/api_spec.js
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@ -48,6 +48,7 @@ import {
RenderingCancelledException,
StatTimer,
} from "../../src/display/display_utils.js";
import { AnnotationStorage } from "../../src/display/annotation_storage.js";
import { AutoPrintRegExp } from "../../web/ui_utils.js";
import { GlobalImageCache } from "../../src/core/image_utils.js";
import { GlobalWorkerOptions } from "../../src/display/worker_options.js";
@ -2826,6 +2827,75 @@ Caron Broadcasting, Inc., an Ohio corporation (“Lessee”).`)
await loadingTask.destroy();
firstImgData = null;
});
it("render for printing, with `printAnnotationStorage` set", async function () {
async function getPrintData(printAnnotationStorage = null) {
const canvasAndCtx = CanvasFactory.create(
viewport.width,
viewport.height
);
const renderTask = pdfPage.render({
canvasContext: canvasAndCtx.context,
canvasFactory: CanvasFactory,
viewport,
intent: "print",
annotationMode: AnnotationMode.ENABLE_STORAGE,
printAnnotationStorage,
});
await renderTask.promise;
const printData = canvasAndCtx.canvas.toDataURL();
CanvasFactory.destroy(canvasAndCtx);
return printData;
}
const loadingTask = getDocument(
buildGetDocumentParams("annotation-tx.pdf")
);
const pdfDoc = await loadingTask.promise;
const pdfPage = await pdfDoc.getPage(1);
const viewport = pdfPage.getViewport({ scale: 1 });
// Update the contents of the form-field.
const { annotationStorage } = pdfDoc;
annotationStorage.setValue("22R", { value: "Hello World" });
// Render for printing, with default parameters.
const printOriginalData = await getPrintData();
// Get the *frozen* print-storage for use during printing.
const printAnnotationStorage = annotationStorage.print;
// Update the contents of the form-field again.
annotationStorage.setValue("22R", { value: "Printing again..." });
const annotationHash = AnnotationStorage.getHash(
annotationStorage.serializable
);
const printAnnotationHash = AnnotationStorage.getHash(
printAnnotationStorage.serializable
);
// Sanity check to ensure that the print-storage didn't change,
// after the form-field was updated.
expect(printAnnotationHash).not.toEqual(annotationHash);
// Render for printing again, after updating the form-field,
// with default parameters.
const printAgainData = await getPrintData();
// Render for printing again, after updating the form-field,
// with `printAnnotationStorage` set.
const printStorageData = await getPrintData(printAnnotationStorage);
// Ensure that printing again, with default parameters,
// actually uses the "new" form-field data.
expect(printAgainData).not.toEqual(printOriginalData);
// Finally ensure that printing, with `printAnnotationStorage` set,
// still uses the "previous" form-field data.
expect(printStorageData).toEqual(printOriginalData);
await loadingTask.destroy();
});
});
describe("Multiple `getDocument` instances", function () {