Use the position of the previous xref stream if any when saving a pdf (bug 1823296)

test/pdfs/bug1823296.pdf.link

@@ -0,0 +1,2 @@
+https://bugzilla.mozilla.org/attachment.cgi?id=9324226
+

test/test_manifest.json

@@ -7496,5 +7496,12 @@
       "md5": "d95a83a868671a03cbf322f16b2e2b9d",
       "link": true,
       "type": "other"
+   },
+   {
+      "id": "bug1823296",
+      "file": "pdfs/bug1823296.pdf",
+      "md5": "f71e89ebe3d6e75e0c83ce41cd72df1f",
+      "link": true,
+      "type": "other"
    }
 ]

test/unit/api_spec.js

@@ -14,6 +14,7 @@
  */
 
 import {
+  AnnotationEditorType,
   AnnotationMode,
   AnnotationType,
   createPromiseCapability,
@@ -1980,6 +1981,35 @@ describe("api", function () {
       await loadingTask.destroy();
     });
 
+    it("write a a new annotation, save the pdf and check that the prev entry in xref stream is correct", async function () {
+      if (isNodeJS) {
+        pending("Linked test-cases are not supported in Node.js.");
+      }
+
+      let loadingTask = getDocument(buildGetDocumentParams("bug1823296.pdf"));
+      let pdfDoc = await loadingTask.promise;
+      pdfDoc.annotationStorage.setValue("pdfjs_internal_editor_0", {
+        annotationType: AnnotationEditorType.FREETEXT,
+        rect: [12, 34, 56, 78],
+        rotation: 0,
+        fontSize: 10,
+        color: [0, 0, 0],
+        value: "Hello PDF.js World!",
+        pageIndex: 0,
+      });
+
+      const data = await pdfDoc.saveDocument();
+      await loadingTask.destroy();
+
+      loadingTask = getDocument(data);
+      pdfDoc = await loadingTask.promise;
+      const xrefPrev = await pdfDoc.getXRefPrevValue();
+
+      expect(xrefPrev).toEqual(143954);
+
+      await loadingTask.destroy();
+    });
+
     describe("Cross-origin", function () {
       let loadingTask;
       function _checkCanLoad(expectSuccess, filename, options) {