Restore date too

src/display/editor/comment.js

@@ -314,6 +314,20 @@ class Comment {
     this.#deleted = false;
   }
 
+  /**
+   * Restore the comment data (used for undo).
+   * @param {Object} data - The comment data to restore.
+   * @param {string} data.text - The comment text.
+   * @param {string|null} data.richText - The rich text content.
+   * @param {Date|null} data.date - The original date.
+   */
+  restoreData({ text, richText, date }) {
+    this.#text = text;
+    this.#richText = richText;
+    this.#date = date;
+    this.#deleted = false;
+  }
+
   setInitialText(text, richText = null) {
     this.#initialText = text;
     this.data = text;

src/display/editor/editor.js

@@ -1220,9 +1220,14 @@ class AnnotationEditor {
     };
   }
 
-  set comment(text) {
+  set comment(value) {
     this.#comment ||= new Comment(this);
-    this.#comment.data = text;
+    if (typeof value === "object" && value !== null) {
+      // Restore full comment data (used for undo).
+      this.#comment.restoreData(value);
+    } else {
+      this.#comment.data = value;
+    }
     if (this.hasComment) {
       this.removeCommentButtonFromToolbar();
       this.addStandaloneCommentButton();

src/display/editor/tools.js

@@ -1180,11 +1180,11 @@ class AnnotationEditorUIManager {
   /**
    * Delete a comment from an editor with undo support.
    * @param {AnnotationEditor} editor - The editor whose comment to delete.
-   * @param {string} savedComment - The comment text to save for undo.
+   * @param {Object} savedData - The comment data to save for undo.
    */
-  deleteComment(editor, savedComment) {
+  deleteComment(editor, savedData) {
     const undo = () => {
-      editor.comment = savedComment;
+      editor.comment = savedData;
     };
     const cmd = () => {
       this._editorUndoBar?.show(undo, "comment");

test/integration/comment_spec.mjs

@@ -999,6 +999,14 @@ describe("Comment", () => {
           );
 
           await page.waitForSelector("#commentPopup", { visible: true });
+
+          // Capture the date before deletion
+          const dateBefore = await page.evaluate(
+            () =>
+              document.querySelector("#commentPopup .commentPopupTime")
+                ?.textContent
+          );
+
           await waitAndClick(page, "button.commentPopupDelete");
 
           await page.waitForSelector("#editorUndoBar", { visible: true });
@@ -1016,6 +1024,16 @@ describe("Comment", () => {
                 ?.textContent
           );
           expect(popupText).withContext(`In ${browserName}`).toEqual(comment);
+
+          // Check that the date is preserved
+          const dateAfter = await page.evaluate(
+            () =>
+              document.querySelector("#commentPopup .commentPopupTime")
+                ?.textContent
+          );
+          expect(dateAfter)
+            .withContext(`In ${browserName}`)
+            .toEqual(dateBefore);
         })
       );
     });

web/comment_manager.js

@@ -982,11 +982,11 @@ class CommentPopup {
           },
         },
       });
-      const savedComment = this.#editor.comment?.text;
       const editor = this.#editor;
+      const savedData = editor.comment;
       this.destroy();
-      if (savedComment) {
+      if (savedData?.text) {
-        editor._uiManager.deleteComment(editor, savedComment);
+        editor._uiManager.deleteComment(editor, savedData);
       } else {
         editor.comment = null;
       }