add import/export functionality for bookmarks in the editor

app/core/src/main/resources/messages_de_DE.properties

@@ -1859,8 +1859,10 @@ editTableOfContents.replaceExisting=Vorhandene Lesezeichen ersetzen (deaktiviere
 editTableOfContents.editorTitle=Lesezeichen-Editor
 editTableOfContents.editorDesc=Fügen unten Lesezeichen hinzu und ordne sie an. Klicke auf +, um das untergeordnete Lesezeichen hinzuzufügen.
 editTableOfContents.addBookmark=Neues Lesezeichen hinzufügen
-editTableOfContents.copyBookmarks=Kopieren
-editTableOfContents.copyBookmarksHint=Kopiere Lesezeichendaten als Text
+editTableOfContents.importBookmarks=Import
+editTableOfContents.exportBookmarks=Export
+editTableOfContents.importBookmarksHint=Lade Lesezeichendaten aus der Zwischenablage
+editTableOfContents.exportBookmarksHint=Exportiere Lesezeichendaten als Text in die Zwischenablage
 editTableOfContents.desc.1=Mit diesem Werkzeug können Sie das Inhaltsverzeichnis (Lesezeichen) eines PDF-Dokuments hinzufügen oder bearbeiten.
 editTableOfContents.desc.2=Sie können eine hierarchische Struktur erstellen, indem Sie untergeordnete Lesezeichen zu übergeordneten hinzufügen.
 editTableOfContents.desc.3=Jedes Lesezeichen benötigt einen Titel und eine Seitenzahl.

app/core/src/main/resources/messages_en_GB.properties

@@ -1859,8 +1859,10 @@ editTableOfContents.replaceExisting=Replace existing bookmarks (uncheck to appen
 editTableOfContents.editorTitle=Bookmark Editor
 editTableOfContents.editorDesc=Add and arrange bookmarks below. Click + to add child bookmarks.
 editTableOfContents.addBookmark=Add New Bookmark
-editTableOfContents.copyBookmarks=Copy
-editTableOfContents.copyBookmarksHint=Copy bookmark data as string
+editTableOfContents.importBookmarks=Import
+editTableOfContents.exportBookmarks=Export
+editTableOfContents.importBookmarksHint=Load bookmark data from clipboard
+editTableOfContents.exportBookmarksHint=Export bookmark data as string to clipboard
 editTableOfContents.desc.1=This tool allows you to add or edit the table of contents (bookmarks) in a PDF document.
 editTableOfContents.desc.2=You can create a hierarchical structure by adding child bookmarks to parent bookmarks.
 editTableOfContents.desc.3=Each bookmark requires a title and target page number.

app/core/src/main/resources/messages_en_US.properties

@@ -1859,8 +1859,10 @@ editTableOfContents.replaceExisting=Replace existing bookmarks (uncheck to appen
 editTableOfContents.editorTitle=Bookmark Editor
 editTableOfContents.editorDesc=Add and arrange bookmarks below. Click + to add child bookmarks.
 editTableOfContents.addBookmark=Add New Bookmark
-editTableOfContents.copyBookmarks=Copy
-editTableOfContents.copyBookmarksHint=Copy bookmark data as string
+editTableOfContents.importBookmarks=Import
+editTableOfContents.exportBookmarks=Export
+editTableOfContents.importBookmarksHint=Load bookmark data from clipboard
+editTableOfContents.exportBookmarksHint=Export bookmark data as string to clipboard
 editTableOfContents.desc.1=This tool allows you to add or edit the table of contents (bookmarks) in a PDF document.
 editTableOfContents.desc.2=You can create a hierarchical structure by adding child bookmarks to parent bookmarks.
 editTableOfContents.desc.3=Each bookmark requires a title and target page number.

app/core/src/main/resources/static/css/edit-table-of-contents.css

@@ -156,7 +156,7 @@
 .bookmark-actions {
   margin-top: 20px;
   display: flex;
-  justify-content: flex-start;
+  justify-content: space-between;
 }
 
 /* Collapse/expand icons */

app/core/src/main/resources/static/js/pages/edit-table-of-contents.js

@@ -597,19 +597,36 @@ document.addEventListener('DOMContentLoaded', function() {
     updateEmptyStateButton();
   }
 
-  // Add copy bookmarks to clipboard functionality
-  async function copyBookmarksStringToClipboard() {
+  // Add import/export bookmarks to clipboard functionality
+  async function importBookmarkStringFromClipboard() {
+    try {
+      const newBookmarkDataString = await navigator.clipboard.readText();
+      const newBookmarkData = JSON.parse(newBookmarkDataString);
+
+      if (!newBookmarkData || newBookmarkData.length === 0) {
+        // don't change bookmarks for empty import data
+        return;
+      }
+
+      bookmarks = newBookmarkData.map(convertExtractedBookmark);
+      updateBookmarksUI();
+    } catch (error) {
+      throw new Error(`Failed to import bookmarks: ${error.message}`);
+    }
+  }
+
+  async function exportBookmarkStringToClipboard() {
     const bookmarkData = bookmarkDataInput.value;
     try {
       await navigator.clipboard.writeText(bookmarkData);
     } catch (error) {
-      throw new Error(`Failed to copy bookmarks: ${error.message}`);
+      throw new Error(`Failed to export bookmarks: ${error.message}`);
     }
   }
 
-  // Add event listener to the copy bookmarks button
-  const copyBookmarksBtn = document.getElementById('copyBookmarksBtn');
-  copyBookmarksBtn.addEventListener('click', copyBookmarksStringToClipboard);
+  // Add event listeners for import/export buttons
+  document.getElementById('importBookmarksBtn').addEventListener('click', importBookmarkStringFromClipboard);
+  document.getElementById('exportBookmarksBtn').addEventListener('click', exportBookmarkStringToClipboard);
 
   // Listen for theme changes to update badge colors
   const observer = new MutationObserver(function(mutations) {

app/core/src/main/resources/templates/edit-table-of-contents.html

@@ -42,6 +42,24 @@
                 
                 <div class="bookmark-actions">
                   <button type="button" id="addBookmarkBtn" class="btn btn-outline-primary" th:text="#{editTableOfContents.addBookmark}"></button>
+                  <div class="d-flex flex-wrap justify-content-end gap-2">
+                    <button type="button"
+                      id="importBookmarksBtn"
+                      class="btn btn-outline-primary"
+                      th:text="#{editTableOfContents.importBookmarks}"
+                      th:data-bs-original-title="#{editTableOfContents.importBookmarksHint}"
+                      data-bs-toggle="tooltip"
+                      data-bs-placement="top">
+                    </button>
+                    <button type="button"
+                      id="exportBookmarksBtn"
+                      class="btn btn-outline-primary"
+                      th:text="#{editTableOfContents.exportBookmarks}"
+                      th:data-bs-original-title="#{editTableOfContents.exportBookmarksHint}"
+                      data-bs-toggle="tooltip"
+                      data-bs-placement="top">
+                    </button>
+                  </div>
                 </div>
                 
                 <!-- Hidden field to store JSON data -->
@@ -51,12 +69,6 @@
               <p>
                 <a class="btn btn-outline-primary" data-bs-toggle="collapse" href="#info" role="button"
                   aria-expanded="false" aria-controls="info" th:text="#{info}"></a>
-                <button type="button"
-                  id="copyBookmarksBtn"
-                  class="btn btn-outline-primary"
-                  th:text="#{editTableOfContents.copyBookmarks}"
-                  th:title="#{editTableOfContents.copyBookmarksHint}">
-                </button>
               </p>
               <div class="collapse" id="info">
                 <p th:text="#{editTableOfContents.desc.1}"></p>