開発者向けPDFライブラリ - Pdftools SDK(Toolbox add-on)

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))
{
    // Create output document
    using Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite);
    using Document outDoc = Document.Create(outStream, inDoc.Conformance, null);
// Copy document-wide data
CopyDocumentData(inDoc, outDoc);
// Define page copy options
PageCopyOptions copyOptions = new PageCopyOptions();

// Copy first page and add annotations
Page outPage = CopyAndAddAnnotations(outDoc, inDoc.Pages[0], copyOptions);
// Add the page to the output document's page list
outDoc.Pages.Add(outPage);

// Copy the remaining pages and add to the output document's page list
PageList inPages = inDoc.Pages.GetRange(1, inDoc.Pages.Count - 1);
PageList outPages = PageList.Copy(outDoc, inPages, copyOptions);
outDoc.Pages.AddRange(outPages);

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static Page CopyAndAddAnnotations(Document outDoc, Page inPage, PageCopyOptions copyOptions)
{
    // Copy page to output document
    Page outPage = Page.Copy(outDoc, inPage, copyOptions);

    // Make a RGB color space
    ColorSpace rgb = ColorSpace.CreateProcessColorSpace(outDoc, ProcessColorSpaceType.Rgb);

    // Get the page size for positioning annotations
    Size pageSize = outPage.Size;

    // Get the output page's list of annotations for adding annotations
    AnnotationList annotations = outPage.Annotations;

    // Create a sticky note and add to output page's annotations
    Paint green = Paint.Create(outDoc, rgb, new double[] { 0, 1, 0 }, null);
    Point stickyNoteTopLeft = new Point() { X = 10, Y = pageSize.Height - 10 };
    StickyNote stickyNote = StickyNote.Create(outDoc, stickyNoteTopLeft, "Hello world!", green);
    annotations.Add(stickyNote);

    // Create an ellipse and add to output page's annotations
    Paint blue = Paint.Create(outDoc, rgb, new double[] { 0, 0, 1 }, null);
    Paint yellow = Paint.Create(outDoc, rgb, new double[] { 1, 1, 0 }, null);
    Rectangle ellipseBox = new Rectangle() { Left = 10, Bottom = pageSize.Height - 60, Right = 70, Top = pageSize.Height - 20 };
    EllipseAnnotation ellipse = EllipseAnnotation.Create(outDoc, ellipseBox, new Stroke(blue, 1.5), yellow);
    annotations.Add(ellipse);

    // Create a free text and add to output page's annotations
    Paint yellowTransp = Paint.Create(outDoc, rgb, new double[] { 1, 1, 0 }, new Transparency(0.5));
    Rectangle freeTextBox = new Rectangle() { Left = 10, Bottom = pageSize.Height - 170, Right = 120, Top = pageSize.Height - 70 };
    FreeText freeText = FreeText.Create(outDoc, freeTextBox, "Lorem ipsum dolor sit amet, consectetur adipiscing elit.", yellowTransp);
    annotations.Add(freeText);

    // A highlight and a web-link to be fitted on existing page content elements
    Highlight highlight = null;
    WebLink webLink = null;
    // Extract content elements from the input page
    ContentExtractor extractor = new ContentExtractor(inPage.Content);
    foreach (ContentElement element in extractor)
    {
        // Take the first text element
        if (highlight == null && element is TextElement textElement)
        {
            // Get the quadrilaterals of this text element
            QuadrilateralList quadrilaterals = new QuadrilateralList();
            foreach (TextFragment fragment in textElement.Text)
                quadrilaterals.Add(fragment.Transform.TransformRectangle(fragment.BoundingBox));

            // Create a highlight and add to output page's annotations
            highlight = Highlight.CreateFromQuadrilaterals(outDoc, quadrilaterals, yellow);
            annotations.Add(highlight);
        }

        // Take the first image element
        if (webLink == null && element is ImageElement)
        {
            // Get the quadrilateral of this image
            QuadrilateralList quadrilaterals = new QuadrilateralList();
            quadrilaterals.Add(element.Transform.TransformRectangle(element.BoundingBox));

            // Create a web-link and add to the output page's links
            webLink = WebLink.CreateFromQuadrilaterals(outDoc, quadrilaterals, "https://www.pdf-tools.com");
            Paint red = Paint.Create(outDoc, rgb, new double[] { 1, 0, 0 }, null);
            webLink.BorderStyle = new Stroke(red, 1.5);
            outPage.Links.Add(webLink);
        }

        // Exit loop if highlight and webLink have been created
        if (highlight != null && webLink != null)
            break;
    }

    // return the finished page
    return outPage;
}