[Editor] Avoid conflicts between new persistent refs and the ones created when saving (bug 1865341)

src/core/font_substitutions.js

@@ -419,6 +419,10 @@ function getFontSubstitution(
   baseFontName,
   standardFontName
 ) {
+  if (baseFontName.startsWith("InvalidPDFjsFont_")) {
+    return null;
+  }
+
   // It's possible to have a font name with spaces, commas or dashes, hence we
   // just replace them by a dash.
   baseFontName = normalizeFontName(baseFontName);

src/core/xref.js

@@ -44,6 +44,7 @@ class XRef {
     this._pendingRefs = new RefSet();
     this._newPersistentRefNum = null;
     this._newTemporaryRefNum = null;
+    this._persistentRefsCache = null;
   }
 
   getNewPersistentRef(obj) {
@@ -63,13 +64,32 @@ class XRef {
     // stream.
     if (this._newTemporaryRefNum === null) {
       this._newTemporaryRefNum = this.entries.length || 1;
+      if (this._newPersistentRefNum) {
+        this._persistentRefsCache = new Map();
+        for (
+          let i = this._newTemporaryRefNum;
+          i < this._newPersistentRefNum;
+          i++
+        ) {
+          // We *temporarily* clear the cache, see `resetNewTemporaryRef` below,
+          // to avoid any conflict with the refs created during saving.
+          this._persistentRefsCache.set(i, this._cacheMap.get(i));
+          this._cacheMap.delete(i);
+        }
+      }
     }
     return Ref.get(this._newTemporaryRefNum++, 0);
   }
 
   resetNewTemporaryRef() {
     // Called once saving is finished.
     this._newTemporaryRefNum = null;
+    if (this._persistentRefsCache) {
+      for (const [num, obj] of this._persistentRefsCache) {
+        this._cacheMap.set(num, obj);
+      }
+    }
+    this._persistentRefsCache = null;
   }
 
   setStartXRef(startXRef) {

test/driver.js

@@ -656,6 +656,12 @@ class Driver {
             if (!task.annotationStorage) {
               throw new Error("Missing `annotationStorage` entry.");
             }
+            if (task.loadAnnotations) {
+              for (let num = 1; num <= doc.numPages; num++) {
+                const page = await doc.getPage(num);
+                await page.getAnnotations({ intent: "display" });
+              }
+            }
             doc.annotationStorage.setAll(task.annotationStorage);
 
             const data = await doc.saveDocument();

test/pdfs/.gitignore

@@ -619,3 +619,4 @@
 !issue17069.pdf
 !issue17215.pdf
 !bug1863910.pdf
+!bug1865341.pdf

test/test_manifest.json

@@ -8381,5 +8381,26 @@
       "link": true,
       "type": "eq",
       "annotations": true
+   },
+   {
+      "id": "bug1865341",
+      "file": "pdfs/bug1865341.pdf",
+      "md5": "e241b6d1dc493df73e77e3eeabc71721",
+      "rounds": 1,
+      "type": "eq",
+      "save": true,
+      "print": true,
+      "loadAnnotations": true,
+      "annotationStorage": {
+         "pdfjs_internal_editor_0": {
+            "annotationType": 3,
+            "color": [255, 0, 0],
+            "fontSize": 10,
+            "value": "Załącznik",
+            "pageIndex": 0,
+            "rect": [ 238, 629, 287, 649],
+            "rotation": 0
+         }
+      }
    }
 ]