// ---------------------------------------------------------------------------
/**
* Parses object and content information of a PDF into a text file.
* @param pdf the original PDF
*
* this method uses code from;
* PdfContentReaderTool.ListContentStreamForPage()
* so i can pass in a byte array instead of file path
*
*/
public string InspectPdf(byte[] pdf)
{
PdfReader reader = new PdfReader(pdf);
int maxPageNum = reader.NumberOfPages;
StringBuilder sb = new StringBuilder();
for (int pageNum = 1; pageNum <= maxPageNum; pageNum++)
{
sb.AppendLine("==============Page " + pageNum + "====================");
sb.AppendLine("- - - - - Dictionary - - - - - -");
PdfDictionary pageDictionary = reader.GetPageN(pageNum);
sb.AppendLine(
PdfContentReaderTool.GetDictionaryDetail(pageDictionary)
);
sb.AppendLine("- - - - - XObject Summary - - - - - -");
sb.AppendLine(PdfContentReaderTool.GetXObjectDetail(
pageDictionary.GetAsDict(PdfName.RESOURCES))
);
sb.AppendLine("- - - - - Content Stream - - - - - -");
RandomAccessFileOrArray f = reader.SafeFile;
byte[] contentBytes = reader.GetPageContent(pageNum, f);
f.Close();
foreach (byte b in contentBytes)
{
sb.Append((char)b);
}
sb.AppendLine("- - - - - Text Extraction - - - - - -");
String extractedText = PdfTextExtractor.GetTextFromPage(
reader, pageNum, new LocationTextExtractionStrategy()
);
if (extractedText.Length != 0)
{
sb.AppendLine(extractedText);
}
else
{
sb.AppendLine("No text found on page " + pageNum);
}
sb.AppendLine();
}
return(sb.ToString());
}
public static void xpdfPage(PdfReader reader, int pageNum, TextWriter outp)
{
outp.WriteLine("==============Page " + pageNum + "====================");
PdfDictionary pageDictionary = reader.GetPageN(pageNum);
if (_outputDictionary)
{
outp.WriteLine("- - - - - Dictionary - - - - - -");
//outp.WriteLine(PdfContentReaderTool.GetDictionaryDetail(pageDictionary));
//string s = PdfContentReaderTool.GetDictionaryDetail(pageDictionary);
string s = GetDictionaryDetail(pageDictionary);
outp.WriteLine(s);
}
if (_outputXObject)
{
outp.WriteLine("- - - - - XObject summary - - - - - -");
outp.WriteLine(PdfContentReaderTool.GetXObjectDetail(pageDictionary.GetAsDict(PdfName.RESOURCES)));
}
if (_outputContentStream)
{
outp.WriteLine("- - - - - Content stream - - - - - -");
RandomAccessFileOrArray f = reader.SafeFile;
byte[] contentBytes = reader.GetPageContent(pageNum, f);
f.Close();
outp.Flush();
foreach (byte b in contentBytes)
{
outp.Write((char)b);
}
outp.Flush();
}
Test_iTextSharp.LocationTextExtractionStrategy strategy = new Test_iTextSharp.LocationTextExtractionStrategy();
//GetTextFromPage(reader, pageNum, strategy);
Test_iTextSharp.PdfTools.ProcessContentPage(reader, pageNum, strategy);
if (_outputText)
{
outp.WriteLine("- - - - - Text extraction - - - - - -");
//LocationTextExtractionStrategy strategy = new LocationTextExtractionStrategy();
//String extractedText = PdfTextExtractor.GetTextFromPage(reader, pageNum, new LocationTextExtractionStrategy());
string extractedText = strategy.GetResultantText();
if (extractedText.Length != 0)
{
outp.WriteLine(extractedText);
outp.WriteLine();
}
else
{
outp.WriteLine("No text found on page " + pageNum);
}
}
if (_outputTextBlocks1)
{
outp.WriteLine("- - - - - Text blocks extraction 1 - - - - - -");
//GetTextFromPage(reader, pageNum, strategy);
//PrintTextBlocks(outp, strategy.textBlocks);
foreach (Test_iTextSharp.TextBlock textBlock in strategy.textBlocks)
{
PrintTextBlock(outp, textBlock, 0);
}
outp.WriteLine();
}
if (_outputTextBlocks2)
{
outp.WriteLine("- - - - - Text blocks extraction 2 - - - - - -");
foreach (Test_iTextSharp.TextBlock textBlock in strategy.textBlocks)
{
outp.Write("block ");
//outp.WriteLine(GetTextBlock(textBlock));
outp.WriteLine(textBlock.GetText());
if (textBlock.childs.Count > 0)
{
outp.WriteLine(" **** warning childs blocks not printed ****");
}
}
outp.WriteLine();
}
if (_outputTextBlocks3)
{
outp.WriteLine("- - - - - Text blocks extraction 3 - - - - - -");
foreach (Test_iTextSharp.TextBlock textBlock in strategy.textBlocks)
{
bool first = true;
//foreach (string s in GetTextBlockByLines(textBlock, _outputMaxCol))
foreach (string s in textBlock.GetTextByLines(_outputMaxCol))
{
if (first)
{
outp.Write("block ");
first = false;
}
else
{
outp.Write(" ");
}
outp.WriteLine(s);
}
if (textBlock.childs.Count > 0)
{
outp.WriteLine(" **** warning childs blocks not printed ****");
}
}
outp.WriteLine();
}
outp.WriteLine();
}
