Add and Delete a Bookmark

Add a Bookmark to a PDF Document

Bookmarks are held in the Document object’s OutlineItemCollection collection, itself in the OutlineCollection collection.

To add a bookmark to a PDF:

1. Open a PDF document using Document object.
2. Create a bookmark and define its properties.
3. Add the OutlineItemCollection collection to the Outlines collection.

The following code snippet shows you how to add a bookmark in a PDF document.

package com.aspose.pdf.examples;

import java.io.IOException;

import com.aspose.pdf.*;
import com.aspose.pdf.facades.Bookmark;
import com.aspose.pdf.facades.Bookmarks;
import com.aspose.pdf.facades.PdfBookmarkEditor;

public class ExampleBookmarks {

    private static String _dataDir = "/home/aspose/pdf-examples/Samples/Bookmarks/";

    private static String GetDataDir() {
        String os = System.getProperty("os.name");
        if (os.startsWith("Windows"))
            _dataDir = "C:\\Samples\\Bookmarks\\";
        return _dataDir;
    }

    public static void AddBookmarks() throws IOException {

        Document pdfDocument = new Document(GetDataDir() + "AddBookmark.pdf");

        // Create a bookmark object
        OutlineItemCollection pdfOutline = new OutlineItemCollection(pdfDocument.getOutlines());
        pdfOutline.setTitle("Test Outline");
        pdfOutline.setItalic(true);
        pdfOutline.setBold(true);

        // Set the destination page number
        pdfOutline.setAction(new GoToAction(pdfDocument.getPages().get_Item(2)));

        // Add a bookmark in the document's outline collection.
        pdfDocument.getOutlines().add(pdfOutline);

        // Save the update document
        pdfDocument.save(_dataDir + "AddBookmark_out.pdf");
    }

Add a Child Bookmark to the PDF Document

Bookmarks can be nested, indicating a hierarchical relationship with parent and child bookmarks. This article explains how to add a child bookmark, that is, a second-level bookmark, to a PDF.

To add a child bookmark to a PDF file, first add a parent bookmark:

1. Open a document.
2. Add a bookmark to the OutlineItemCollection, defining its properties.
3. Add the OutlineItemCollection to the Document object’s OutlineCollection collection.

The child bookmark is created just like the parent bookmark, explained above, but is added to the parent bookmark’s Outlines collection

The following code snippets show how to add child bookmark to a PDF document.

    public static void AddChildBookmark() {
        // Open document
        Document pdfDocument = new Document(GetDataDir() + "AddChildBookmark.pdf");

        // Create a parent bookmark object
        OutlineItemCollection pdfOutline = new OutlineItemCollection(pdfDocument.getOutlines());
        pdfOutline.setTitle("Parent Outline");
        pdfOutline.setItalic(true);
        pdfOutline.setBold(true);

        // Create a child bookmark object
        OutlineItemCollection pdfChildOutline = new OutlineItemCollection(pdfDocument.getOutlines());
        pdfChildOutline.setTitle("Child Outline");
        pdfChildOutline.setItalic(true);
        pdfChildOutline.setBold(true);

        // Add child bookmark in parent bookmark's collection
        pdfOutline.add(pdfChildOutline);
        // Add parent bookmark in the document's outline collection.
        pdfDocument.getOutlines().add(pdfOutline);

        // Save output
        pdfDocument.save(_dataDir + "AddChildBookmark_out.pdf");
    }

Delete all Bookmarks from a PDF Document

All bookmarks in a PDF are held in the OutlineCollection collection. This article explains how to delete all bookmarks from a PDF file.

To delete all bookmarks from a PDF file:

1. Call the OutlineCollection collection’s Delete method.
2. Save the modified file using the Document object’s Save method.

The following code snippets show how to delete all bookmarks from a PDF document.

    public static void DeleteAllBookmarksFromPDFDocument() {
        // Open document
        Document pdfDocument = new Document(GetDataDir() + "DeleteAllBookmarks.pdf");

        // Delete all bookmarks
        pdfDocument.getOutlines().delete();

        // Save updated file
        pdfDocument.save(_dataDir + "DeleteAllBookmarks_out.pdf");
    }

Delete a Particular Bookmark from a PDF Document

Delete All Attachments from PDF document showed how to delete all attachments from a PDF file. It is also possible to only remove specific attachments.

To delete a particular bookmark from a PDF file:

1. Pass the bookmark’s title as parameter to the OutlineCollection collection’s Delete method.
2. Then save the updated file with the Document object Save method.

The Document class’ provides the OutlineCollection collection. The Delete method removes any bookmark with the title passed to the method.

The following code snippets show how to delete a particular bookmark from the PDF document.

    public static void DeleteParticularBookmarkPDFDocument() {
        // Open document
        Document pdfDocument = new Document(GetDataDir() + "DeleteParticularBookmark.pdf");

        // Delete particular outline by Title
        pdfDocument.getOutlines().delete("Child Outline");

        // Save updated file
        pdfDocument.save(_dataDir + "DeleteParticularBookmark_out.pdf");
    }