Search for destinations in both /Names and /Dests dictionaries (issue 19474)

Currently we only use either one of them, preferring the NameTree when it's available.

src/core/catalog.js

@@ -707,8 +707,9 @@ class Catalog {
   }
 
   get destinations() {
-    const obj = this._readDests(),
+    const rawDests = this.#readDests(),
       dests = Object.create(null);
+    for (const obj of rawDests) {
       if (obj instanceof NameTree) {
         for (const [key, value] of obj.getAll()) {
           const dest = fetchDest(value);
@@ -720,7 +721,9 @@ class Catalog {
         for (const [key, value] of obj) {
           const dest = fetchDest(value);
           if (dest) {
-          dests[key] = dest;
+            // Always let the NameTree take precedence.
+            dests[key] ||= dest;
+          }
         }
       }
     }
@@ -728,40 +731,39 @@ class Catalog {
   }
 
   getDestination(id) {
-    const obj = this._readDests();
+    const rawDests = this.#readDests();
-    if (obj instanceof NameTree) {
+    for (const obj of rawDests) {
+      if (obj instanceof NameTree || obj instanceof Dict) {
         const dest = fetchDest(obj.get(id));
         if (dest) {
           return dest;
         }
+      }
+    }
+
+    if (rawDests[0] instanceof NameTree) {
       // Fallback to checking the *entire* NameTree, in an attempt to handle
       // corrupt PDF documents with out-of-order NameTrees (fixes issue 10272).
-      const allDest = this.destinations[id];
+      const dest = this.destinations[id];
-      if (allDest) {
-        warn(`Found "${id}" at an incorrect position in the NameTree.`);
-        return allDest;
-      }
-    } else if (obj instanceof Dict) {
-      const dest = fetchDest(obj.get(id));
       if (dest) {
+        warn(`Found "${id}" at an incorrect position in the NameTree.`);
         return dest;
       }
     }
     return null;
   }
 
-  /**
+  #readDests() {
-   * @private
-   */
-  _readDests() {
     const obj = this._catDict.get("Names");
+    const rawDests = [];
     if (obj?.has("Dests")) {
-      return new NameTree(obj.getRaw("Dests"), this.xref);
+      rawDests.push(new NameTree(obj.getRaw("Dests"), this.xref));
-    } else if (this._catDict.has("Dests")) {
-      // Simple destination dictionary.
-      return this._catDict.get("Dests");
     }
-    return undefined;
+    if (this._catDict.has("Dests")) {
+      // Simple destination dictionary.
+      rawDests.push(this._catDict.get("Dests"));
+    }
+    return rawDests;
   }
 
   get pageLabels() {

test/pdfs/.gitignore

@@ -533,6 +533,7 @@
 !transparent.pdf
 !issue19326.pdf
 !issue13931.pdf
+!issue19474.pdf
 !xobject-image.pdf
 !issue15441.pdf
 !issue6605.pdf

test/unit/api_spec.js

@@ -1261,6 +1261,19 @@ describe("api", function () {
       await loadingTask.destroy();
     });
 
+    it("gets destinations, from /Names (NameTree) respectively /Dests dictionary", async function () {
+      const loadingTask = getDocument(buildGetDocumentParams("issue19474.pdf"));
+      const pdfDoc = await loadingTask.promise;
+      const destinations = await pdfDoc.getDestinations();
+      expect(destinations).toEqual({
+        A: [{ num: 1, gen: 0 }, { name: "Fit" }],
+        B: [{ num: 4, gen: 0 }, { name: "Fit" }],
+        C: [{ num: 5, gen: 0 }, { name: "Fit" }],
+      });
+
+      await loadingTask.destroy();
+    });
+
     it("gets a destination, from /Names (NameTree) dictionary", async function () {
       const loadingTask = getDocument(buildGetDocumentParams("issue6204.pdf"));
       const pdfDoc = await loadingTask.promise;
@@ -1320,6 +1333,22 @@ describe("api", function () {
       await loadingTask.destroy();
     });
 
+    it("gets a destination, from /Names (NameTree) respectively /Dests dictionary", async function () {
+      const loadingTask = getDocument(buildGetDocumentParams("issue19474.pdf"));
+      const pdfDoc = await loadingTask.promise;
+
+      const destA = await pdfDoc.getDestination("A");
+      expect(destA).toEqual([{ num: 1, gen: 0 }, { name: "Fit" }]);
+
+      const destB = await pdfDoc.getDestination("B");
+      expect(destB).toEqual([{ num: 4, gen: 0 }, { name: "Fit" }]);
+
+      const destC = await pdfDoc.getDestination("C");
+      expect(destC).toEqual([{ num: 5, gen: 0 }, { name: "Fit" }]);
+
+      await loadingTask.destroy();
+    });
+
     it("gets non-string destination", async function () {
       let numberPromise = pdfDocument.getDestination(4.3);
       let booleanPromise = pdfDocument.getDestination(true);