[api-minor] Don't add in the text content the chars which are out-of-page (bug 1755201)

- it aims to fix https://bugzilla.mozilla.org/show_bug.cgi?id=1755201;
- if the glyph position is not within the view then skip it.

test/pdfs/bug1755201.pdf.link

@@ -0,0 +1 @@
+https://bugzilla.mozilla.org/attachment.cgi?id=9263657

test/test_manifest.json

@@ -1,4 +1,11 @@
 [
+    {  "id": "bug1755201",
+      "file": "pdfs/bug1755201.pdf",
+      "md5": "cece14097812d8a1f69e86a51e4a3804",
+      "rounds": 1,
+      "link": true,
+      "type": "other"
+    },
     {  "id": "filled-background-range",
       "file": "pdfs/filled-background.pdf",
       "md5": "2e3120255d9c3e79b96d2543b12d2589",

test/unit/api_spec.js

@@ -2219,6 +2219,22 @@ Caron Broadcasting, Inc., an Ohio corporation (“Lessee”).`)
       await loadingTask.destroy();
     });
 
+    it("gets text content, and check that out-of-page text is not present (bug 1755201)", async function () {
+      if (isNodeJS) {
+        pending("Linked test-cases are not supported in Node.js.");
+      }
+
+      const loadingTask = getDocument(buildGetDocumentParams("bug1755201.pdf"));
+      const pdfDoc = await loadingTask.promise;
+      const pdfPage = await pdfDoc.getPage(6);
+      const { items } = await pdfPage.getTextContent();
+      const text = mergeText(items);
+
+      expect(/win aisle/.test(text)).toEqual(false);
+
+      await loadingTask.destroy();
+    });
+
     it("gets empty structure tree", async function () {
       const tree = await page.getStructTree();