/**
* <summary>Replaces the Acroform fields with their corresponding graphics representation.</summary>
* <param name="document">Document to flatten.</param>
*/
public void Flatten(Document document)
{
Dictionary <Page, PageStamper> pageStampers = new Dictionary <Page, PageStamper>();
Form form = document.Form;
Fields formFields = form.Fields;
foreach (Field field in formFields.Values)
{
foreach (Widget widget in field.Widgets)
{
Page widgetPage = widget.Page;
AnnotationFlagsEnum flags = widget.Flags;
// Is the widget to be rendered?
if (((flags & AnnotationFlagsEnum.Hidden) == 0 || hiddenRendered) &&
((flags & AnnotationFlagsEnum.Print) > 0 || nonPrintableRendered))
{
// Stamping the current state appearance of the widget...
PdfName widgetCurrentState = (PdfName)widget.BaseDataObject[PdfName.AS];
FormXObject widgetCurrentAppearance = widget.Appearance.Normal[widgetCurrentState];
if (widgetCurrentAppearance != null)
{
PageStamper widgetStamper;
if (!pageStampers.TryGetValue(widgetPage, out widgetStamper))
{
pageStampers[widgetPage] = widgetStamper = new PageStamper(widgetPage);
}
SKRect widgetBox = widget.Box;
widgetStamper.Foreground.ShowXObject(widgetCurrentAppearance, widgetBox.Location, widgetBox.Size);
}
}
// Removing the widget from the page annotations...
PageAnnotations widgetPageAnnotations = widgetPage.Annotations;
widgetPageAnnotations.Remove(widget);
if (widgetPageAnnotations.Count == 0)
{
widgetPage.Annotations = null;
widgetPageAnnotations.Delete();
}
// Removing the field references relating the widget...
PdfDictionary fieldPartDictionary = widget.BaseDataObject;
while (fieldPartDictionary != null)
{
PdfDictionary parentFieldPartDictionary = (PdfDictionary)fieldPartDictionary.Resolve(PdfName.Parent);
PdfArray kidsArray;
if (parentFieldPartDictionary != null)
{
kidsArray = (PdfArray)parentFieldPartDictionary.Resolve(PdfName.Kids);
}
else
{
kidsArray = formFields.BaseDataObject;
}
kidsArray.Remove(fieldPartDictionary.Reference);
fieldPartDictionary.Delete();
if (kidsArray.Count > 0)
{
break;
}
fieldPartDictionary = parentFieldPartDictionary;
}
}
}
if (formFields.Count == 0)
{
// Removing the form root...
document.Form = null;
form.Delete();
}
foreach (PageStamper pageStamper in pageStampers.Values)
{
pageStamper.Flush();
}
}