public IUILayerNode Wrap(PdfDirectObject baseObject)
{
if (baseObject == null)
{
return(null);
}
if (baseObject.Wrapper is IUILayerNode node)
{
return(node);
}
PdfDataObject baseDataObject = baseObject.Resolve();
if (baseDataObject is PdfDictionary)
{
return(Wrap <Layer>(baseObject));
}
else if (baseDataObject is PdfArray)
{
return(Wrap <LayerCollection>(baseObject));
}
else
{
throw new ArgumentException(baseDataObject.GetType().Name + " is NOT a valid layer node.");
}
}
/**
<summary>Gets the character map extracted from the given encoding object.</summary>
<param name="encodingObject">Encoding object.</param>
*/
public static IDictionary<ByteArray,int> Get(
PdfDataObject encodingObject
)
{
if(encodingObject == null)
return null;
if(encodingObject is PdfName) // Predefined CMap.
return Get((PdfName)encodingObject);
else if(encodingObject is PdfStream) // Embedded CMap file.
return Get((PdfStream)encodingObject);
else
throw new NotSupportedException("Unknown encoding object type: " + encodingObject.GetType().Name);
}
/**
* <summary>Gets the character map extracted from the given encoding object.</summary>
* <param name="encodingObject">Encoding object.</param>
*/
public static CMap Get(PdfDataObject encodingObject)
{
if (encodingObject == null)
{
return(null);
}
if (encodingObject is PdfName pdfName) // Predefined CMap.
{
return(Get(pdfName));
}
else if (encodingObject is PdfStream pdfStream) // Embedded CMap file.
{
return(Get(pdfStream));
}
else
{
throw new NotSupportedException("Unknown encoding object type: " + encodingObject.GetType().Name);
}
}
private void FillObjects(
PdfDataObject objectObject,
ICollection <PdfObjectWrapper> objects
)
{
PdfDataObject objectDataObject = PdfObject.Resolve(objectObject);
if (objectDataObject is PdfArray) // Multiple objects.
{
foreach (PdfDirectObject itemObject in (PdfArray)objectDataObject)
{
FillObjects(itemObject, objects);
}
}
else // Single object.
{
if (objectDataObject is PdfDictionary) // Annotation.
{
objects.Add(
Annotation.Wrap((PdfReference)objectObject)
);
}
else if (objectDataObject is PdfTextString) // Form field (associated to widget annotations).
{
objects.Add(
Document.Form.Fields[
(string)((PdfTextString)objectDataObject).Value
]
);
}
else // Invalid object type.
{
throw new Exception(
"Invalid 'Hide' action target type (" + objectDataObject.GetType().Name + ").\n"
+ "It should be either an annotation or a form field."
);
}
}
}
public static ILayerNode Wrap(
PdfDirectObject baseObject
)
{
if (baseObject == null)
{
return(null);
}
PdfDataObject baseDataObject = baseObject.Resolve();
if (baseDataObject is PdfDictionary)
{
return(Layer.Wrap(baseObject));
}
else if (baseDataObject is PdfArray)
{
return(Layers.Wrap(baseObject));
}
else
{
throw new ArgumentException(baseDataObject.GetType().Name + " is NOT a valid layer node.");
}
}
public override void Run(
)
{
// 1. Opening the PDF file...
string filePath = PromptFileChoice("Please select a PDF file");
using (var file = new File(filePath))
{
Document document = file.Document;
// 2. Parsing the document...
// 2.1. Metadata.
// 2.1.1. Basic metadata.
Console.WriteLine("\nDocument information:");
Information info = document.Information;
if (info.Exists())
{
foreach (KeyValuePair <PdfName, object> infoEntry in info)
{
Console.WriteLine(infoEntry.Key + ": " + infoEntry.Value);
}
}
else
{
Console.WriteLine("No information available (Info dictionary doesn't exist).");
}
// 2.1.2. Advanced metadata.
Console.WriteLine("\nDocument metadata (XMP):");
Metadata metadata = document.Metadata;
if (metadata.Exists())
{
try
{
XmlDocument metadataContent = metadata.Content;
Console.WriteLine(ToString(metadataContent));
}
catch (Exception e)
{ Console.WriteLine("Metadata extraction failed: " + e.Message); }
}
else
{
Console.WriteLine("No metadata available (Metadata stream doesn't exist).");
}
Console.WriteLine("\nIterating through the indirect-object collection (please wait)...");
// 2.2. Counting the indirect objects, grouping them by type...
var objCounters = new SortedDictionary <string, int>();
objCounters["xref free entry"] = 0;
foreach (PdfIndirectObject obj in file.IndirectObjects)
{
if (obj.IsInUse()) // In-use entry.
{
PdfDataObject dataObject = obj.DataObject;
string typeName = (dataObject != null ? dataObject.GetType().Name : "empty entry");
if (objCounters.ContainsKey(typeName))
{
objCounters[typeName]++;
}
else
{
objCounters[typeName] = 1;
}
}
else // Free entry.
{
objCounters["xref free entry"]++;
}
}
Console.WriteLine("\nIndirect objects partial counts (grouped by PDF object type):");
foreach (KeyValuePair <string, int> keyValuePair in objCounters)
{
Console.WriteLine(" " + keyValuePair.Key + ": " + keyValuePair.Value);
}
Console.WriteLine("Indirect objects total count: " + file.IndirectObjects.Count);
// 2.3. Showing some page information...
Pages pages = document.Pages;
int pageCount = pages.Count;
Console.WriteLine("\nPage count: " + pageCount);
int pageIndex = (int)Math.Round(pageCount / 2d);
Console.WriteLine("Mid page:");
PrintPageInfo(pages[pageIndex], pageIndex);
pageIndex++;
if (pageIndex < pageCount)
{
Console.WriteLine("Next page:");
PrintPageInfo(pages[pageIndex], pageIndex);
}
}
}
