private static string GetName(PdfDictionary.DictionaryElements dict, string key)
{
var obj = (object)dict[key];
if (obj == null)
{
return(string.Empty);
}
if (obj is PdfReference pdfReference)
{
obj = pdfReference.Value;
}
var pdfName = obj as PdfName;
// do not change! hacky casting to string - there's a bug in PdfSharp
string nullString = null;
if (pdfName != nullString)
{
return(pdfName.Value);
}
if (obj is PdfNameObject pdfNameObject)
{
return(pdfNameObject.Value);
}
return(null);
}
public static string GetName2(this PdfDictionary.DictionaryElements dict, string key)
{
object obj = dict[key];
if (obj == null)
{
return(string.Empty);
}
if (obj is PdfReference pdfReference)
{
obj = pdfReference.Value;
}
if (obj is PdfName pdfName)
{
return(pdfName.Value);
}
if (obj is PdfNameObject pdfNameObject)
{
return(pdfNameObject.Value);
}
throw new InvalidCastException("GetName: Object is not a name.");
}
/// <summary>
/// Sets the color to the specified key.
/// </summary>
/// <param name="elements">The elements.</param>
/// <param name="key">The key.</param>
/// <param name="color">The color.</param>
public static void SetColor(this PdfDictionary.DictionaryElements elements, string key, XColor color)
{
if (elements == null)
{
throw new ArgumentNullException("elements");
}
if (!string.IsNullOrEmpty(key))
{
var arr = new PdfArray();
arr.Elements.Add(new PdfReal(color.R / (double)byte.MaxValue));
arr.Elements.Add(new PdfReal(color.G / (double)byte.MaxValue));
arr.Elements.Add(new PdfReal(color.B / (double)byte.MaxValue));
elements[key] = arr;
}
}
public static string GetName3(this PdfDictionary.DictionaryElements dict, string key)
{
var value = dict[key];
switch (value)
{
case PdfReference pdfReference:
switch (pdfReference.Value)
{
case PdfNameObject pdfNameObject:
return(pdfNameObject.Value);
default:
return(string.Empty);
}
case PdfName pdfName:
return(pdfName.Value);
default:
return(string.Empty);
}
}
internal PageLabels(PdfDocument document)
{
page_labels = new SortedDictionary <int, PageLabelFormat> ();
pdf_elements = document.Internals.Catalog.Elements;
pdf_document = document;
edited = false;
// Ignore documents that don't have labelling stuff defined
if (!pdf_elements.ContainsKey(name_labels))
{
return;
}
// Ignore documents that don't have a properly-defined PageLabelFmt section
PdfDictionary my_labels = pdf_elements.GetDictionary(name_labels);
if (!my_labels.Elements.ContainsKey(name_numtree))
{
return;
}
/* The number tree (not my term) is a PdfArray arranged as follows: [##, dict, ##, dict, ##, dict ...]
* ## represents the starting index of the page (0-based) and the following dict is a PdfDictionary
* containing formatting information regarding the range
*/
PdfArray number_tree = my_labels.Elements.GetArray(name_numtree);
for (int i = 0; i < number_tree.Elements.Count / 2; ++i)
{
Console.WriteLine("Range # {0}", i);
PageLabelFormat temp_label = new PageLabelFormat();
int range_start = number_tree.Elements.GetInteger(i * 2);
PdfDictionary label_data = number_tree.Elements.GetDictionary(i * 2 + 1);
// Set the prefix, default to ""
if (label_data.Elements.ContainsKey(name_prefix))
{
temp_label.prefix = label_data.Elements.GetString(name_prefix);
}
else
{
temp_label.prefix = "";
}
// Set the start number, default to 1
if (label_data.Elements.ContainsKey(name_start_at))
{
temp_label.first_number = label_data.Elements.GetInteger(name_start_at);
}
else
{
temp_label.first_number = 1;
}
// Set the format type, default to no numbering (only show the prefix)
if (label_data.Elements.ContainsKey(name_fmt))
{
temp_label.number_style = label_data.Elements.GetString(name_fmt);
}
else
{
temp_label.number_style = "";
}
page_labels.Add(range_start, temp_label);
}
}