Don't fail getTextContent when the first text in a stream has a zero font size (issue 22381)

src/core/evaluator.js

@@ -2982,8 +2982,8 @@ class PartialEvaluator {
         currentTextState !== textState &&
         (currentTextState.fontSize !== textState.fontSize ||
           (currentTextState.fontName !== textState.fontName &&
-            (currentTextState.font.name !== textState.font.name ||
-              currentTextState.font.vertical !== textState.font.vertical)))
+            (currentTextState.font?.name !== textState.font?.name ||
+              currentTextState.font?.vertical !== textState.font?.vertical)))
       ) {
         flushTextContentItem();
         currentTextState = textState.clone();

test/pdfs/.gitignore

@@ -189,6 +189,7 @@
 !bug1337429.pdf
 !bug1606566.pdf
 !bug2086012.pdf
+!issue22381.pdf
 !issue5564_reduced.pdf
 !canvas.pdf
 !bug1132849.pdf

test/test_manifest.json

@@ -14647,6 +14647,13 @@
     "rounds": 1,
     "type": "eq"
   },
+  {
+    "id": "issue22381",
+    "file": "pdfs/issue22381.pdf",
+    "md5": "3f5fd4d65e246557510fefa4bd6cebcb",
+    "rounds": 1,
+    "type": "text"
+  },
   {
     "id": "devicen-none-zero-domain",
     "file": "pdfs/devicen-none-zero-domain.pdf",

test/unit/api_spec.js

@@ -5600,6 +5600,21 @@ have written that much by now. So, here’s to squashing bugs.`);
       await loadingTask.destroy();
     });
 
+    it("gets text content when the first text has a zero font size (issue 22381)", async function () {
+      const loadingTask = getDocument(
+        buildGetDocumentParams("issue22381.pdf", { stopAtErrors: true })
+      );
+      const pdfDoc = await loadingTask.promise;
+      const pdfPage = await pdfDoc.getPage(1);
+      const { items } = await pdfPage.getTextContent({
+        disableNormalization: true,
+      });
+      const text = mergeText(items);
+      expect(text).toEqual("hiddenVisible text");
+
+      await loadingTask.destroy();
+    });
+
     it("gets empty structure tree", async function () {
       const tree = await page.getStructTree();