/// <summary>
/// Helper function for ImportExternalPage.
/// </summary>
void CloneElement(PDFPage page, PDFPage importPage, string key, bool deepcopy)
{
Debug.Assert(page != null);
Debug.Assert(page.Owner == _document);
Debug.Assert(importPage.Owner != null);
Debug.Assert(importPage.Owner != _document);
PDFItem item = importPage.Elements[key];
if (item != null)
{
PDFImportedObjectTable importedObjectTable = null;
if (!deepcopy)
{
importedObjectTable = Owner.ExternalDocumentTable.GetImportedObjectTable(importPage);
}
// The item can be indirect. If so, replace it by its value.
if (item is PDFReference)
{
item = ((PDFReference)item).Value;
}
if (item is PDFObject root)
{
if (deepcopy)
{
Debug.Assert(root.Owner != null, "See 'else' case for details");
root = DeepCopyClosure(_document, root);
}
else
{
// The owner can be null if the item is not a reference.
if (root.Owner == null)
{
root.Document = importPage.Owner;
}
root = ImportClosure(importedObjectTable, page.Owner, root);
}
page.Elements[key] = root.Reference == null ? root : (PDFItem)root.Reference;
}
else
{
// Simple items are just cloned.
page.Elements[key] = item.Clone();
}
}
}
/// <summary>
/// Initializes a new instance of the PDFRectangle class with the specified PDFArray.
/// </summary>
internal PDFRectangle(PDFItem item)
{
if (item == null || item is PDFNull)
{
return;
}
if (item is PDFReference)
{
item = ((PDFReference)item).Value;
}
if (!(item is PDFArray array))
{
throw new InvalidOperationException(PSSR.UnexpectedTokenInPDFFile);
}
X1 = array.Elements.GetReal(0);
Y1 = array.Elements.GetReal(1);
X2 = array.Elements.GetReal(2);
Y2 = array.Elements.GetReal(3);
}