/// <summary>
/// PDF link annotation constructor
/// </summary>
/// <param name="Page">Associated page</param>
/// <param name="AnnotRect">Annotation rectangle</param>
/// <param name="WebLink">Weblink</param>
public PdfAnnotation
(
PdfPage Page,
PdfRectangle AnnotRect,
PdfWebLink WebLink
) : base(Page.Document)
{
// annotation subtype
Dictionary.Add("/Subtype", "/Link");
// action reference dictionary
Dictionary.AddIndirectReference("/A", WebLink);
// constructor helper method
ContructorHelper(Page, AnnotRect);
// exit
return;
}
////////////////////////////////////////////////////////////////////
/// <summary>
/// Add weblink to this page
/// </summary>
/// <param name="WeblinkArea">Weblink area</param>
/// <param name="WebLinkStr">Hyperlink string</param>
/// <remarks>
/// <para>
/// The four position arguments are in relation to the
/// bottom left corner of the paper.
/// If web link is empty, ignore this call.
/// </para>
/// <para>
/// For more information go to <a href="http://www.codeproject.com/Articles/570682/PDF-File-Writer-Csharp-Class-Library-Version#WeblinkSupport">2.7 Web Link Support</a>
/// </para>
/// </remarks>
////////////////////////////////////////////////////////////////////
public void AddWebLink
(
PdfRectangle WeblinkArea,
String WebLinkStr
)
{
// if web link is empty, ignore this call
if (String.IsNullOrWhiteSpace(WebLinkStr))
{
return;
}
// create weblink action or reuse duplicate
PdfWebLink WebLinkAction = PdfWebLink.AddWebLink(Document, WebLinkStr);
// create PdfObject for annotation
PdfAnnotation Annotation = new PdfAnnotation(this, WeblinkArea, WebLinkAction);
// exit
return;
}
/// <summary>
/// PdfAnnotation constructor
/// </summary>
/// <param name="AnnotPage">Page object</param>
/// <param name="AnnotRect">Annotation rectangle</param>
/// <param name="AnnotAction">Annotation action</param>
internal PdfAnnotation
(
PdfPage AnnotPage,
PdfRectangle AnnotRect,
AnnotAction AnnotAction
) : base(AnnotPage.Document)
{
// save arguments
this.AnnotPage = AnnotPage;
this.AnnotRect = AnnotRect;
this.AnnotAction = AnnotAction;
// annotation subtype
Dictionary.Add("/Subtype", AnnotAction.Subtype);
// area rectangle on the page
Dictionary.AddRectangle("/Rect", AnnotRect);
// annotation flags. value of 4 = Bit position 3 print
Dictionary.Add("/F", "4");
// border style dictionary. If /BS with /W 0 is not specified, the annotation will have a thin border
Dictionary.Add("/BS", "<</W 0>>");
// web link
if (AnnotAction.GetType() == typeof(AnnotWebLink))
{
Dictionary.AddIndirectReference("/A",
PdfWebLink.AddWebLink(Document, ((AnnotWebLink)AnnotAction).WebLinkStr));
}
// jump to destination
else if (AnnotAction.GetType() == typeof(AnnotLinkAction))
{
if (Document.LinkAnnotArray == null)
{
Document.LinkAnnotArray = new List <PdfAnnotation>();
}
Document.LinkAnnotArray.Add(this);
}
// display video or play sound
else if (AnnotAction.GetType() == typeof(AnnotDisplayMedia))
{
var DisplayMedia = ((AnnotDisplayMedia)AnnotAction).DisplayMedia;
// action reference dictionary
Dictionary.AddIndirectReference("/A", DisplayMedia);
// add page reference
Dictionary.AddIndirectReference("/P", AnnotPage);
// add annotation reference
DisplayMedia.Dictionary.AddIndirectReference("/AN", this);
}
// file attachment
else if (AnnotAction.GetType() == typeof(AnnotFileAttachment))
{
// add file attachment reference
var File = (AnnotFileAttachment)AnnotAction;
Dictionary.AddIndirectReference("/FS", File.EmbeddedFile);
if (File.Icon != FileAttachIcon.NoIcon)
{
// icon
Dictionary.AddName("/Name", File.Icon.ToString());
}
else
{
// no icon
var XObject = new PdfXObject(Document, AnnotRect.Right, AnnotRect.Top);
Dictionary.AddFormat("/AP", "<</N {0} 0 R>>", XObject.ObjectNumber);
}
}
// add annotation object to page dictionary
var KeyValue = AnnotPage.Dictionary.GetValue("/Annots");
if (KeyValue == null)
{
AnnotPage.Dictionary.AddFormat("/Annots", "[{0} 0 R]", ObjectNumber);
}
else
{
AnnotPage.Dictionary.Add("/Annots",
((string)KeyValue.Value).Replace("]", string.Format(" {0} 0 R]", ObjectNumber)));
}
// exit
}
