Remove terminal white spaces when extracting text from annotation appearances

src/core/annotation.js

@@ -1195,7 +1195,7 @@ class Annotation {
           firstPosition ||= item.transform.slice(-2);
           buffer.push(item.str);
           if (item.hasEOL) {
-            text.push(buffer.join(""));
+            text.push(buffer.join("").trimEnd());
             buffer.length = 0;
           }
         }
@@ -1214,7 +1214,7 @@ class Annotation {
     this.reset();
 
     if (buffer.length) {
-      text.push(buffer.join(""));
+      text.push(buffer.join("").trimEnd());
     }
 
     if (text.length > 1 || text[0]) {
@@ -3788,7 +3788,9 @@ class FreeTextAnnotation extends MarkupAnnotation {
       this.data.defaultAppearanceData.fontSize ||= 10;
       const { fontColor, fontSize } = this.data.defaultAppearanceData;
       if (this._contents.str) {
-        this.data.textContent = this._contents.str.split(/\r\n?|\n/);
+        this.data.textContent = this._contents.str
+          .split(/\r\n?|\n/)
+          .map(line => line.trimEnd());
         const { coords, bbox, matrix } = FakeUnicodeFont.getFirstPositionInfo(
           this.rectangle,
           this.rotation,

test/integration-boot.mjs

@@ -33,6 +33,7 @@ async function runTests(results) {
       "ink_editor_spec.mjs",
       "scripting_spec.mjs",
       "stamp_editor_spec.mjs",
+      "text_field_spec.mjs",
     ],
   });
 

test/integration/text_field_spec.mjs

@@ -0,0 +1,39 @@
+/* Copyright 2024 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { closePages, getSelector, loadAndWait } from "./test_utils.mjs";
+
+describe("Text field", () => {
+  describe("Empty text field", () => {
+    let pages;
+
+    beforeAll(async () => {
+      pages = await loadAndWait("file_pdfjs_form.pdf", getSelector("7R"));
+    });
+
+    afterAll(async () => {
+      await closePages(pages);
+    });
+
+    it("must check that the field is empty although its appearance contains a white space", async () => {
+      await Promise.all(
+        pages.map(async ([browserName, page]) => {
+          const text = await page.$eval(getSelector("7R"), el => el.value);
+          expect(text).withContext(`In ${browserName}`).toEqual("");
+        })
+      );
+    });
+  });
+});

test/pdfs/.gitignore

@@ -623,3 +623,4 @@
 !bug1872721.pdf
 !bug1871353.pdf
 !bug1871353.1.pdf
+!file_pdfjs_form.pdf