public PdfPageLinks GetPageLinks(int pageNumber, Size pageSize)
{
if (_disposed)
{
throw new ObjectDisposedException(GetType().Name);
}
var links = new List <PdfPageLink>();
using (var pageData = new PageData(_document, _form, pageNumber))
{
int link = 0;
IntPtr annotation;
while (NativePdfiumMethods.FPDFLink_Enumerate(pageData.Page, ref link, out annotation))
{
var destination = NativePdfiumMethods.FPDFLink_GetDest(_document, annotation);
int? target = null;
string uri = null;
if (destination != IntPtr.Zero)
{
target = (int)NativePdfiumMethods.FPDFDest_GetPageIndex(_document, destination);
}
var action = NativePdfiumMethods.FPDFLink_GetAction(annotation);
if (action != IntPtr.Zero)
{
const uint length = 1024;
var sb = new StringBuilder(1024);
NativePdfiumMethods.FPDFAction_GetURIPath(_document, action, sb, length);
uri = sb.ToString();
}
var rect = new NativePdfiumMethods.FS_RECTF();
if (NativePdfiumMethods.FPDFLink_GetAnnotRect(annotation, rect) && (target.HasValue || uri != null))
{
int deviceX1;
int deviceY1;
int deviceX2;
int deviceY2;
NativePdfiumMethods.FPDF_PageToDevice(
pageData.Page,
0,
0,
pageSize.Width,
pageSize.Height,
0,
rect.left,
rect.top,
out deviceX1,
out deviceY1
);
NativePdfiumMethods.FPDF_PageToDevice(
pageData.Page,
0,
0,
pageSize.Width,
pageSize.Height,
0,
rect.right,
rect.bottom,
out deviceX2,
out deviceY2
);
links.Add(new PdfPageLink(
new Rectangle(deviceX1, deviceY1, deviceX2 - deviceX1, deviceY2 - deviceY1),
target,
uri
));
}
}
}
return(new PdfPageLinks(links));
}