[Editor] Corrrectly get the words from the alt-text when reporting the telemetry (bug 1929311)

test/integration/stamp_editor_spec.mjs

@@ -897,6 +897,9 @@ describe("Stamp Editor", () => {
             eventBus.on("annotationeditoruimanager", ({ uiManager }) => {
               window.uiManager = uiManager;
             });
+            eventBus.on("reporttelemetry", ({ details }) => {
+              (window.telemetry ||= []).push(structuredClone(details));
+            });
           },
         },
         {
@@ -917,6 +920,7 @@ describe("Stamp Editor", () => {
         }
         await page.evaluate(() => {
           window.uiManager.reset();
+          window.telemetry = [];
         });
         // Disable editing mode.
         await switchToStamp(page, /* disable */ true);
@@ -953,7 +957,7 @@ describe("Stamp Editor", () => {
         // Check that AI guessed the correct alt text.
         await page.waitForFunction(
           `document.getElementById("newAltTextDescriptionTextarea").value ===
-            "Fake alt text"`
+            "Fake alt text."`
         );
 
         // Check that the dialog has the correct title: "Edit..."
@@ -1182,6 +1186,82 @@ describe("Stamp Editor", () => {
         await page.waitForSelector("#newAltTextDisclaimer[hidden]");
       }
     });
+
+    it("must check that the data in telemetry are correct", async () => {
+      // Run sequentially to avoid clipboard issues.
+      for (const [browserName, page] of pages) {
+        await page.evaluate(() => {
+          window.PDFViewerApplication.mlManager.enableAltTextModelDownload = true;
+        });
+        await switchToStamp(page);
+
+        // Add an image.
+        await copyImage(page, "../images/firefox_logo.png", 0);
+        const editorSelector = getEditorSelector(0);
+        await page.waitForSelector(editorSelector);
+        await waitForSerialized(page, 1);
+
+        // Wait for the dialog to be visible.
+        await page.waitForSelector("#newAltTextDialog", { visible: true });
+
+        // Check that AI guessed the correct alt text.
+        await page.waitForFunction(
+          `document.getElementById("newAltTextDescriptionTextarea").value ===
+                    "Fake alt text."`
+        );
+        // Clear the input and check that the title changes to "Add..."
+        await clearInput(
+          page,
+          "#newAltTextDescriptionTextarea",
+          /* waitForInputEvent = */ true
+        );
+        // Save the empty text.
+        await page.click("#newAltTextSave");
+        await page.waitForSelector("#newAltTextDialog", { visible: false });
+
+        // Get the telemetry data and clean.
+        let telemetry = await page.evaluate(() => {
+          const tel = window.telemetry;
+          window.telemetry = [];
+          return tel;
+        });
+        let saveTelemetry = telemetry.find(
+          details => details.data.action === "pdfjs.image.alt_text.user_edit"
+        );
+        expect(saveTelemetry.data.data)
+          .withContext(`In ${browserName}`)
+          .toEqual({
+            total_words: 3,
+            words_removed: 3,
+            words_added: 0,
+          });
+
+        // Click on the Review button.
+        const buttonSelector = `${editorSelector} button.altText.new`;
+        await page.waitForSelector(buttonSelector, { visible: true });
+        await page.click(buttonSelector);
+        await page.waitForSelector("#newAltTextDialog", { visible: true });
+
+        // Add a new alt text and check that the title changes to "Edit..."
+        await page.type("#newAltTextDescriptionTextarea", "Fake text alt foo.");
+
+        // Save the empty text.
+        await page.click("#newAltTextSave");
+        await page.waitForSelector("#newAltTextDialog", { visible: false });
+
+        telemetry = await page.evaluate(() => window.telemetry);
+        saveTelemetry = telemetry.find(
+          details => details.data.action === "pdfjs.image.alt_text.user_edit"
+        );
+        expect(saveTelemetry.data.data)
+          .withContext(`In ${browserName}`)
+          .toEqual({
+            total_words: 3,
+            words_removed: 0,
+            words_added: 1,
+          });
+      }
+    });
   });
 
   describe("New alt-text flow (bug 1920515)", () => {

web/genericcom.js

@@ -132,7 +132,7 @@ class FakeMLManager {
   guess({ request: { data } }) {
     return new Promise(resolve => {
       setTimeout(() => {
-        resolve(data ? { output: "Fake alt text" } : { error: true });
+        resolve(data ? { output: "Fake alt text." } : { error: true });
       }, 3000);
     });
   }

web/new_alt_text_manager.js

@@ -460,6 +460,15 @@ class NewAltTextManager {
     this.#uiManager = null;
   }
 
+  #extractWords(text) {
+    return new Set(
+      text
+        .toLowerCase()
+        .split(/[^\p{L}\p{N}]+/gu)
+        .filter(x => !!x)
+    );
+  }
+
   #save() {
     const altText = this.#textarea.value.trim();
     this.#currentEditor.altTextData = {
@@ -469,8 +478,8 @@ class NewAltTextManager {
     this.#currentEditor.altTextData.guessedAltText = this.#guessedAltText;
 
     if (this.#guessedAltText && this.#guessedAltText !== altText) {
-      const guessedWords = new Set(this.#guessedAltText.split(/\s+/));
+      const guessedWords = this.#extractWords(this.#guessedAltText);
-      const words = new Set(altText.split(/\s+/));
+      const words = this.#extractWords(altText);
       this.#currentEditor._reportTelemetry({
         action: "pdfjs.image.alt_text.user_edit",
         data: {