/// <summary>
/// CustomPdfReader to be able to work with streams.
/// </summary>
public CustomPdfReader(Stream isp, X509Certificate certificate, ICipherParameters certificateKey)
{
this.certificate = certificate;
this.certificateKey = certificateKey;
tokens = new PRTokeniser(new RandomAccessFileOrArray(isp));
ReadPdf();
}
/**
* Unescapes an URL. All the "%xx" are replaced by the 'xx' hex char value.
* @param src the url to unescape
* @return the eunescaped value
*/
public static String UnEscapeURL(String src)
{
StringBuilder bf = new StringBuilder();
char[] s = src.ToCharArray();
for (int k = 0; k < s.Length; ++k)
{
char c = s[k];
if (c == '%')
{
if (k + 2 >= s.Length)
{
bf.Append(c);
continue;
}
int a0 = PRTokeniser.GetHex((int)s[k + 1]);
int a1 = PRTokeniser.GetHex((int)s[k + 2]);
if (a0 < 0 || a1 < 0)
{
bf.Append(c);
continue;
}
bf.Append((char)(a0 * 16 + a1));
k += 2;
}
else
{
bf.Append(c);
}
}
return(bf.ToString());
}
/**
* Parses the next inline image dictionary from the parser. The parser must be positioned immediately following the EI operator.
* The parser will be left with position immediately following the whitespace character that follows the ID operator that ends the inline image dictionary.
* @param ps the parser to extract the embedded image information from
* @return the dictionary for the inline image, with any abbreviations converted to regular image dictionary keys and values
* @throws IOException if the parse fails
*/
private static PdfDictionary ParseInlineImageDictionary(PdfContentParser ps)
{
// by the time we get to here, we have already parsed the BI operator
PdfDictionary dictionary = new PdfDictionary();
for (PdfObject key = ps.ReadPRObject(); key != null && !"ID".Equals(key.ToString()); key = ps.ReadPRObject())
{
PdfObject value = ps.ReadPRObject();
PdfName resolvedKey;
inlineImageEntryAbbreviationMap.TryGetValue((PdfName)key, out resolvedKey);
if (resolvedKey == null)
{
resolvedKey = (PdfName)key;
}
dictionary.Put(resolvedKey, GetAlternateValue(resolvedKey, value));
}
int ch = ps.GetTokeniser().Read();
if (!PRTokeniser.IsWhitespace(ch))
{
throw new IOException("Unexpected character " + ch + " found after ID in inline image");
}
return(dictionary);
}
/**
* Processes PDF syntax.
* <b>Note:</b> If you re-use a given {@link PdfContentStreamProcessor}, you must call {@link PdfContentStreamProcessor#reset()}
* @param contentBytes the bytes of a content stream
* @param resources the resources that come with the content stream
*/
public void ProcessContent(byte[] contentBytes, PdfDictionary resources)
{
this.resources.Push(resources);
PRTokeniser tokeniser = new PRTokeniser(contentBytes);
PdfContentParser ps = new PdfContentParser(tokeniser);
List <iTextSharp.text.pdf.PdfObject> operands = new List <iTextSharp.text.pdf.PdfObject>();
while (ps.Parse(operands).Count > 0)
{
PdfLiteral oper = (PdfLiteral)operands[operands.Count - 1];
// w.GetOperatorInfo(oper)
//w.wr.Print("operator info {0} type {1} string {2}", oper.GetType().ToString(), oper.Type, oper.ToString());
if ("BI".Equals(oper.ToString()))
{
// we don't call invokeOperator for embedded images - this is one area of the PDF spec that is particularly nasty and inconsistent
PdfDictionary colorSpaceDic = resources != null?resources.GetAsDict(PdfName.COLORSPACE) : null;
// 'iTextSharp.text.pdf.parser.ImageRenderInfo.CreateForEmbeddedImage(iTextSharp.text.pdf.parser.Matrix, iTextSharp.text.pdf.parser.InlineImageInfo, iTextSharp.text.pdf.PdfDictionary)' is inaccessible due to its protection level
ImageRenderInfo renderInfo = ImageRenderInfo.CreateForEmbeddedImage(Gs().ctm, InlineImageUtils.ParseInlineImage(ps, colorSpaceDic), colorSpaceDic);
renderListener.RenderImage(renderInfo);
}
else
{
InvokeOperator(oper, operands);
}
}
this.resources.Pop();
}
public byte[] Modify(byte[] contentBytes, PdfDictionary resourcesDictionary)
{
_contentStreamBuilderStack.Push(new PdfContentStreamBuilder());
_resourceDictionaryStack.Push(resourcesDictionary);
PRTokeniser tokeniser = new PRTokeniser(new RandomAccessFileOrArray(contentBytes));
PdfContentParser ps = new PdfContentParser(tokeniser);
List <PdfObject> operands = new List <PdfObject>();
while (ps.Parse(operands).Count > 0)
{
PdfLiteral oper = (PdfLiteral)operands[operands.Count - 1];
PdfContentOperatorHandler operHandler = null;
if (_operators.TryGetValue(oper.ToString(), out operHandler))
{
operands = operHandler(oper, operands);
}
_contentStreamBuilderStack.Peek().Push(operands);
}
_resourceDictionaryStack.Pop();
return(_contentStreamBuilderStack.Pop().GetBytes());
}
private static void ParsePdf(byte[] pdf, IPdfParsingStrategy strategy)
{
PdfReader reader = new PdfReader(pdf);
for (int i = 1; i <= reader.NumberOfPages; i++)
{
byte[] page = reader.GetPageContent(i);
if (page != null)
{
PRTokeniser tokenizer = new PRTokeniser(page);
List <PdfToken> parameters = new List <PdfToken>();
while (tokenizer.NextToken())
{
var token = PdfToken.Create(tokenizer);
if (token.IsOperand)
{
strategy.Execute(new PdfOperation(token, parameters));
parameters.Clear();
}
else
{
parameters.Add(token);
}
}
}
}
}
/**
* Processes PDF syntax
* @param contentBytes the bytes of a content stream
* @param resources the resources that come with the content stream
*/
public void ProcessContent(byte[] contentBytes, PdfDictionary resources)
{
this.resources.Push(resources);
PRTokeniser tokeniser = new PRTokeniser(contentBytes);
PdfContentParser ps = new PdfContentParser(tokeniser);
List <PdfObject> operands = new List <PdfObject>();
while (ps.Parse(operands).Count > 0)
{
PdfLiteral oper = (PdfLiteral)operands[operands.Count - 1];
if ("BI".Equals(oper.ToString()))
{
// we don't call invokeOperator for embedded images - this is one area of the PDF spec that is particularly nasty and inconsistent
PdfDictionary colorSpaceDic = resources.GetAsDict(PdfName.COLORSPACE);
ImageRenderInfo renderInfo = ImageRenderInfo.CreatedForEmbeddedImage(Gs().ctm, InlineImageUtils.ParseInlineImage(ps, colorSpaceDic));
renderListener.RenderImage(renderInfo);
}
else
{
InvokeOperator(oper, operands);
}
}
this.resources.Pop();
}
private void CheckNumberValue(String data, String expectedValue)
{
PRTokeniser tok = new PRTokeniser(new RandomAccessFileOrArray(GetBytes(data)));
tok.NextValidToken();
Assert.AreEqual(PRTokeniser.TokType.NUMBER, tok.TokenType, "Wrong type");
Assert.AreEqual(expectedValue, tok.StringValue, "Wrong multiple minus signs number handling");
}
private void CheckTokenTypes(String data, params PRTokeniser.TokType[] expectedTypes)
{
PRTokeniser tok = new PRTokeniser(new RandomAccessFileOrArray(GetBytes(data)));
for (int i = 0; i < expectedTypes.Length; i++)
{
tok.NextValidToken();
//System.out.println(tok.getTokenType() + " -> " + tok.getStringValue());
Assert.AreEqual(expectedTypes[i], tok.TokenType, "Position " + i);
}
}
IDictionary <string, IList <object> > ParseDAParam(PdfString DA)
{
IDictionary <string, IList <object> > commandArguments = new Dictionary <string, IList <object> >();
PRTokeniser tokeniser = new PRTokeniser(new RandomAccessFileOrArray(new RandomAccessSourceFactory().CreateSource(DA.GetBytes())));
IList <object> currentArguments = new List <object>();
while (tokeniser.NextToken())
{
if (tokeniser.TokenType == PRTokeniser.TokType.OTHER)
{
String key = tokeniser.StringValue;
if (key == "RG" || key == "G" || key == "K")
{
key = STROKE_COLOR;
}
else if (key == "rg" || key == "g" || key == "k")
{
key = FILL_COLOR;
}
if (commandArguments.ContainsKey(key))
{
commandArguments[key] = currentArguments;
}
else
{
commandArguments.Add(key, currentArguments);
}
currentArguments = new List <object>();
}
else
{
switch (tokeniser.TokenType)
{
case PRTokeniser.TokType.NUMBER:
currentArguments.Add(new PdfNumber(tokeniser.StringValue));
break;
case PRTokeniser.TokType.NAME:
currentArguments.Add(new PdfName(tokeniser.StringValue));
break;
default:
currentArguments.Add(tokeniser.StringValue);
break;
}
}
}
return(commandArguments);
}
public string ParsePdf(string filePath)
{
string text = string.Empty;
PdfReader reader = new iTextSharp.text.pdf.PdfReader(filePath);
byte[] streamBytes = reader.GetPageContent(1);
FileStream fStream = File.OpenRead(filePath);
byte[] contents = new byte[fStream.Length];
fStream.Read(contents, 0, (int)fStream.Length);
fStream.Close();
string s = Encoding.UTF8.GetString(contents, 0, contents.Length);
var table = (Encoding.Default.GetString(streamBytes, 0, streamBytes.Length - 1)).Split(new string[] { "\r\n", "\r", "\n" }, StringSplitOptions.None);
byte[] buf = Encoding.Convert(Encoding.GetEncoding("iso-8859-1"), Encoding.UTF8, streamBytes);
string tempString = Encoding.UTF8.GetString(buf, 0, buf.Count());
PRTokeniser tokenizer = new PRTokeniser(streamBytes);
while (tokenizer.NextToken())
{
if (tokenizer.TokenType == PRTokeniser.TK_STRING)
{
text += tokenizer.StringValue;
}
}
// create a reader (constructor overloaded for path to local file or URL)
//PdfReader reader
// = new PdfReader("http://www.chinehamchat.com/Chineham_Chat_Advertisements.pdf");
// total number of pages
int n = reader.NumberOfPages;
// size of the first page
Rectangle psize = reader.GetPageSize(1);
//float width = psize.Width;
//float height = psize.Height;
//Console.WriteLine("Size of page 1 of {0} => {1} × {2}", n, width, height);
// file properties
Hashtable infoHash = reader.Info;
ICollection keys = infoHash.Keys;
// Dictionary<string, string> infodict = (Dictionary<string,string>)reader.Info;
foreach (string key in keys)
{
text += key + " => " + infoHash[key];
}
// Console.WriteLine(key+ " => " + infoHash[key]);
return(text);
}
virtual public bool CompareInnerText(String path1, String path2)
{
PdfReader reader1 = new PdfReader(path1);
byte[] streamBytes1 = reader1.GetPageContent(1);
PRTokeniser tokenizer1 =
new PRTokeniser(new RandomAccessFileOrArray(new RandomAccessSourceFactory().CreateSource(streamBytes1)));
PdfReader reader2 = new PdfReader(path2);
byte[] streamBytes2 = reader2.GetPageContent(1);
PRTokeniser tokenizer2 =
new PRTokeniser(new RandomAccessFileOrArray(new RandomAccessSourceFactory().CreateSource(streamBytes2)));
try {
while (tokenizer1.NextToken())
{
if (!tokenizer2.NextToken())
{
return(false);
}
else
{
if (tokenizer1.TokenType != tokenizer2.TokenType)
{
return(false);
}
else
{
if (tokenizer1.TokenType == tokenizer2.TokenType && tokenizer2.TokenType == PRTokeniser.TokType.NUMBER)
{
if (Math.Abs(float.Parse(tokenizer1.StringValue, CultureInfo.InvariantCulture)
- float.Parse(tokenizer2.StringValue, CultureInfo.InvariantCulture)) > 0.001)
{
return(false);
}
}
else if (!tokenizer1.StringValue.Equals(tokenizer2.StringValue))
{
return(false);
}
}
}
}
return(true);
}
finally {
reader1.Close();
reader2.Close();
}
}
/**
* Parses the samples of the image from the underlying content parser, ignoring all filters.
* The parser must be positioned immediately after the ID operator that ends the inline image's dictionary.
* The parser will be left positioned immediately following the EI operator.
* This is primarily useful if no filters have been applied.
* @param imageDictionary the dictionary of the inline image
* @param ps the content parser
* @return the samples of the image
* @throws IOException if anything bad happens during parsing
*/
private static byte[] ParseUnfilteredSamples(PdfDictionary imageDictionary, PdfDictionary colorSpaceDic, PdfContentParser ps)
{
// special case: when no filter is specified, we just read the number of bits
// per component, multiplied by the width and height.
if (imageDictionary.Contains(PdfName.FILTER))
{
throw new ArgumentException("Dictionary contains filters");
}
PdfNumber h = imageDictionary.GetAsNumber(PdfName.HEIGHT);
int bytesToRead = ComputeBytesPerRow(imageDictionary, colorSpaceDic) * h.IntValue;
byte[] bytes = new byte[bytesToRead];
PRTokeniser tokeniser = ps.GetTokeniser();
int shouldBeWhiteSpace = tokeniser.Read(); // skip next character (which better be a whitespace character - I suppose we could check for this)
// from the PDF spec: Unless the image uses ASCIIHexDecode or ASCII85Decode as one of its filters, the ID operator shall be followed by a single white-space character, and the next character shall be interpreted as the first byte of image data.
// unfortunately, we've seen some PDFs where there is no space following the ID, so we have to capture this case and handle it
int startIndex = 0;
if (!PRTokeniser.IsWhitespace(shouldBeWhiteSpace) || shouldBeWhiteSpace == 0) // tokeniser treats 0 as whitespace, but for our purposes, we shouldn't)
{
bytes[0] = (byte)shouldBeWhiteSpace;
startIndex++;
}
for (int i = startIndex; i < bytesToRead; i++)
{
int ch = tokeniser.Read();
if (ch == -1)
{
throw new InlineImageParseException("End of content stream reached before end of image data");
}
bytes[i] = (byte)ch;
}
PdfObject ei = ps.ReadPRObject();
if (!ei.ToString().Equals("EI"))
{
// Some PDF producers seem to add another non-whitespace character after the image data.
// Let's try to handle that case here.
PdfObject ei2 = ps.ReadPRObject();
if (!ei2.ToString().Equals("EI"))
{
throw new InlineImageParseException("EI not found after end of image data");
}
}
return(bytes);
}
// ---------------------------------------------------------------------------
/**
* Parses the PDF using PRTokeniser
* @param src the ]original PDF file
* ] */
public string ParsePdf(byte[] src)
{
PdfReader reader = new PdfReader(src);
// we can inspect the syntax of the imported page
byte[] streamBytes = reader.GetPageContent(1);
StringBuilder sb = new StringBuilder();
PRTokeniser tokenizer = new PRTokeniser(streamBytes);
while (tokenizer.NextToken())
{
if (tokenizer.TokenType == PRTokeniser.TokType.STRING)
{
sb.AppendLine(tokenizer.StringValue);
}
}
return(sb.ToString());
}
/// <summary>
/// Parses a stream object and removes OCGs. </summary>
/// <param name="stream"> a stream object </param>
/// <param name="resources"> the resources dictionary of that object (containing info about the OCGs) </param>
public virtual void Parse(PRStream stream, PdfDictionary resources)
{
baos = new MemoryStream();
properties = resources.GetAsDict(PdfName.PROPERTIES);
xobj = new HashSet2 <PdfName>();
PdfDictionary xobjects = resources.GetAsDict(PdfName.XOBJECT);
if (xobjects != null)
{
// remove XObject (form or image) that belong to an OCG that needs to be removed
foreach (PdfName name in xobjects.Keys)
{
PRStream xobject = (PRStream)xobjects.GetAsStream(name);
PdfDictionary oc = xobject.GetAsDict(PdfName.OC);
if (oc != null)
{
PdfString ocname = oc.GetAsString(PdfName.NAME);
if (ocname != null && ocgs.Contains(ocname.ToString()))
{
xobj.Add(name);
}
}
}
foreach (PdfName name in xobj)
{
xobjects.Remove(name);
}
}
// parse the content stream
byte[] contentBytes = PdfReader.GetStreamBytes(stream);
PRTokeniser tokeniser = new PRTokeniser(new RandomAccessFileOrArray(contentBytes));
PdfContentParser ps = new PdfContentParser(tokeniser);
List <PdfObject> operands = new List <PdfObject>();
while (ps.Parse(operands).Count > 0)
{
PdfLiteral @operator = (PdfLiteral)operands[operands.Count - 1];
ProcessOperator(this, @operator, operands);
}
baos.Flush();
baos.Close();
stream.SetData(baos.GetBuffer());
}
public List <DataTable> Load(MemoryStream stream)
{
var tables = new List <DataTable>();
var sb = new StringBuilder();
var reader = new PdfReader(stream);
for (int page = 1; page <= reader.NumberOfPages; page++)
{
var cpage = reader.GetPageN(page);
var content = cpage.Get(PdfName.CONTENTS);
var ir = (PRIndirectReference)content;
var value = reader.GetPdfObject(ir.Number);
if (value.IsStream())
{
PRStream prstream = (PRStream)value;
var streamBytes = PdfReader.GetStreamBytes(prstream);
var tokenizer = new PRTokeniser(new RandomAccessFileOrArray(streamBytes));
try
{
while (tokenizer.NextToken())
{
if (tokenizer.TokenType == PRTokeniser.TK_STRING)
{
string str = tokenizer.StringValue;
sb.AppendLine(str);
}
}
}
finally
{
tokenizer.Close();
}
}
}
Console.WriteLine(sb.ToString());
return(tables);
}
/// <summary>
/// Old algorithm designed to work with iTextSharp 4.1.6. Use iTextSharp version >= 5 if possible (license changes were made).
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
internal static string ExtractTextFromPdfBytes(byte[] input)
{
if (input == null || input.Length == 0)
{
return("");
}
var result = new StringBuilder();
var tokeniser = new PRTokeniser(input);
try
{
while (tokeniser.NextToken())
{
var tknType = tokeniser.TokenType;
var tknValue = tokeniser.StringValue.Replace('\0', ' ');
if (tknType == PRTokeniser.TK_STRING)
{
result.Append(tknValue);
}
else
{
switch (tknValue)
{
case "-600":
result.Append(" ");
break;
case "TJ":
result.Append(" ");
break;
}
}
}
}
finally
{
tokeniser.Close();
}
return(result.ToString());
}
public void TestPRTokenizer()
{
String obj = "13 0 obj\n" +
"<< /Type /StructElem /Pg 111117220777773888836 0 R>>\n" +
"endobj";
PRTokeniser tokens = new PRTokeniser(new RandomAccessFileOrArray(Encoding.ASCII.GetBytes(obj)));
for (int i = 0; i < 11; i++)
{
tokens.NextValidToken();
if (tokens.TokenType == PRTokeniser.TokType.REF)
{
Assert.IsTrue(tokens.Reference < 0);
}
if (tokens.TokenType == PRTokeniser.TokType.ENDOFFILE)
{
break;
}
}
}
static void Main(string[] args)
{
string pdfPath = "C:\\mypdf.pdf";
PdfReader reader = new PdfReader(pdfPath);
StringBuilder sb = new StringBuilder();
for (int page = 1; page <= reader.NumberOfPages; page++)
{
var cpage = reader.GetPageN(page);
var content = cpage.Get(PdfName.CONTENTS);
var ir = (PRIndirectReference)content;
var value = reader.GetPdfObject(ir.Number);
if (value.IsStream())
{
PRStream stream = (PRStream)value;
var streamBytes = PdfReader.GetStreamBytes(stream);
var tokenizer = new PRTokeniser(new RandomAccessFileOrArray(streamBytes));
try
{
while (tokenizer.NextToken())
{
if (tokenizer.TokenType == PRTokeniser.TK_STRING)
{
string str = tokenizer.StringValue;
sb.Append(str);
}
}
}
finally
{
tokenizer.Close();
}
}
}
Console.Write("PDF Content:" + Environment.NewLine);
Console.Write(sb.ToString());
Console.Write(Environment.NewLine + "--EOF--");
}
public static PdfData ConvertToPdfData(string fileName, int pageNum)
{
if ((string.IsNullOrEmpty(fileName) || string.IsNullOrWhiteSpace(fileName)) && pageNum <= 0)
{
return(null);
}
Helpers.D.Log("PdfConvertIText.ConvertToPdfData({0}, {1})", fileName, pageNum);
PdfData data = new PdfData();
PdfContentParser parser;// = new PdfContentParser();
PRTokeniser tokeniser = new PRTokeniser(fileName);
PdfDictionary dict;
ArrayList items;
parser = new PdfContentParser(tokeniser);
dict = parser.ReadDictionary();
//dict.Contains(PdfName.IMAGE)
items = parser.Parse(parser.ReadArray().ArrayList);
Helpers.D.Log("PdfConvertIText.ConvertToPdfData: {0} | {1}", items.Count, string.Join(", ", items.ToArray()));
return(data);
}
/**
* Processes PDF syntax.
* <b>Note:</b> If you re-use a given {@link PdfContentStreamProcessor}, you must call {@link PdfContentStreamProcessor#reset()}
* @param contentBytes the bytes of a content stream
* @param resources the resources that come with the content stream
*/
virtual public void ProcessContent(byte[] contentBytes, PdfDictionary resources)
{
this.resources.Push(resources);
PRTokeniser tokeniser = new PRTokeniser(new RandomAccessFileOrArray(new RandomAccessSourceFactory().CreateSource(contentBytes)));
PdfContentParser ps = new PdfContentParser(tokeniser);
List <PdfObject> operands = new List <PdfObject>();
while (ps.Parse(operands).Count > 0)
{
PdfLiteral oper = (PdfLiteral)operands[operands.Count - 1];
if ("BI".Equals(oper.ToString()))
{
// we don't call invokeOperator for embedded images - this is one area of the PDF spec that is particularly nasty and inconsistent
PdfDictionary colorSpaceDic = resources != null?resources.GetAsDict(PdfName.COLORSPACE) : null;
HandleInlineImage(InlineImageUtils.ParseInlineImage(ps, colorSpaceDic), colorSpaceDic);
}
else
{
InvokeOperator(oper, operands);
}
}
this.resources.Pop();
}
/**
* Parses the samples of the image from the underlying content parser, ignoring all filters.
* The parser must be positioned immediately after the ID operator that ends the inline image's dictionary.
* The parser will be left positioned immediately following the EI operator.
* This is primarily useful if no filters have been applied.
* @param imageDictionary the dictionary of the inline image
* @param ps the content parser
* @return the samples of the image
* @throws IOException if anything bad happens during parsing
*/
private static byte[] ParseUnfilteredSamples(PdfDictionary imageDictionary, PdfContentParser ps)
{
// special case: when no filter is specified, we just read the number of bits
// per component, multiplied by the width and height.
if (imageDictionary.Contains(PdfName.FILTER))
{
throw new ArgumentException("Dictionary contains filters");
}
PdfNumber h = imageDictionary.GetAsNumber(PdfName.HEIGHT);
int bytesToRead = ComputeBytesPerRow(imageDictionary) * h.IntValue;
byte[] bytes = new byte[bytesToRead];
PRTokeniser tokeniser = ps.GetTokeniser();
tokeniser.Read(); // skip next character (which better be a whitespace character - I suppose we could check for this)
for (int i = 0; i < bytesToRead; i++)
{
int ch = tokeniser.Read();
if (ch == -1)
{
throw new InlineImageParseException("End of content stream reached before end of image data");
}
bytes[i] = (byte)ch;
}
PdfObject ei = ps.ReadPRObject();
if (!ei.ToString().Equals("EI"))
{
throw new InlineImageParseException("EI not found after end of image data");
}
return(bytes);
}
/**
* Parses the samples of the image from the underlying content parser, accounting for filters
* The parser must be positioned immediately after the ID operator that ends the inline image's dictionary.
* The parser will be left positioned immediately following the EI operator.
* <b>Note:</b>This implementation does not actually apply the filters at this time
* @param imageDictionary the dictionary of the inline image
* @param ps the content parser
* @return the samples of the image
* @throws IOException if anything bad happens during parsing
*/
private static byte[] ParseInlineImageSamples(PdfDictionary imageDictionary, PdfDictionary colorSpaceDic, PdfContentParser ps)
{
// by the time we get to here, we have already parsed the ID operator
if (!imageDictionary.Contains(PdfName.FILTER))
{
return(ParseUnfilteredSamples(imageDictionary, colorSpaceDic, ps));
}
// read all content until we reach an EI operator surrounded by whitespace.
// The following algorithm has two potential issues: what if the image stream
// contains <ws>EI<ws> ?
// Plus, there are some streams that don't have the <ws> before the EI operator
// it sounds like we would have to actually decode the content stream, which
// I'd rather avoid right now.
MemoryStream baos = new MemoryStream();
MemoryStream accumulated = new MemoryStream();
int ch;
int found = 0;
PRTokeniser tokeniser = ps.GetTokeniser();
byte[] ff = null;
while ((ch = tokeniser.Read()) != -1)
{
if (found == 0 && PRTokeniser.IsWhitespace(ch))
{
found++;
accumulated.WriteByte((byte)ch);
}
else if (found == 1 && ch == 'E')
{
found++;
accumulated.WriteByte((byte)ch);
}
else if (found == 1 && PRTokeniser.IsWhitespace(ch))
{
// this clause is needed if we have a white space character that is part of the image data
// followed by a whitespace character that precedes the EI operator. In this case, we need
// to flush the first whitespace, then treat the current whitespace as the first potential
// character for the end of stream check. Note that we don't increment 'found' here.
baos.Write(ff = accumulated.ToArray(), 0, ff.Length);
accumulated.SetLength(0);
accumulated.WriteByte((byte)ch);
}
else if (found == 2 && ch == 'I')
{
found++;
accumulated.WriteByte((byte)ch);
}
else if (found == 3 && PRTokeniser.IsWhitespace(ch))
{
byte[] tmp = baos.ToArray();
if (InlineImageStreamBytesAreComplete(tmp, imageDictionary))
{
return(tmp);
}
byte[] accumulatedArr = accumulated.ToArray();
baos.Write(accumulatedArr, 0, accumulatedArr.Length);
accumulated.SetLength(0);
baos.WriteByte((byte)ch);
found = 0;
}
else
{
baos.Write(ff = accumulated.ToArray(), 0, ff.Length);
accumulated.SetLength(0);
baos.WriteByte((byte)ch);
found = 0;
}
}
throw new InlineImageParseException("Could not find image data or EI");
}
/**
* Processes PDF syntax
* @param contentBytes the bytes of a content stream
* @param resources the resources that come with the content stream
*/
public void ProcessContent(byte[] contentBytes, PdfDictionary resources)
{
this.resources.Push(resources);
PRTokeniser tokeniser = new PRTokeniser(contentBytes);
PdfContentParser ps = new PdfContentParser(tokeniser);
List <PdfObject> operands = new List <PdfObject>();
while (ps.Parse(operands).Count > 0)
{
PdfLiteral oper = (PdfLiteral)operands[operands.Count - 1];
// special handling for embedded images. If we hit an ID oper, we need
// to skip all content until we reach an EI oper surrounded by whitespace.
// The following algorithm has one potential issue: what if the image stream
// contains <ws>EI<ws> ?
// it sounds like we would have to actually decode the content stream, which
// I'd rather avoid right now.
if ("ID".Equals(oper.ToString()))
{
MemoryStream baos = new MemoryStream();
MemoryStream accumulated = new MemoryStream();
int ch;
int found = 0;
while ((ch = tokeniser.Read()) != -1)
{
if (found == 0 && PRTokeniser.IsWhitespace(ch))
{
found++;
accumulated.WriteByte((byte)ch);
}
else if (found == 1 && ch == 'E')
{
found++;
accumulated.WriteByte((byte)ch);
}
else if (found == 2 && ch == 'I')
{
found++;
accumulated.WriteByte((byte)ch);
}
else if (found == 3 && PRTokeniser.IsWhitespace(ch))
{
operands = new List <PdfObject>();
operands.Add(new PdfLiteral("ID"));
InvokeOperator((PdfLiteral)operands[operands.Count - 1], operands);
// we should probably eventually do something to make the accumulated image content stream available
operands = new List <PdfObject>();
operands.Add(new PdfLiteral("EI"));
InvokeOperator((PdfLiteral)operands[operands.Count - 1], operands);
break;
}
else
{
accumulated.WriteTo(baos);
accumulated.SetLength(0);
baos.WriteByte((byte)ch);
found = 0;
}
}
}
InvokeOperator(oper, operands);
}
this.resources.Pop();
}
public static PdfToken Create(PRTokeniser tokenizer)
{
return(new PdfToken(tokenizer.TokenType, tokenizer.StringValue));
}
private static void ParseCid(String cmapName, AbstractCMap cmap, ICidLocation location, int level)
{
if (level >= MAXLEVEL)
{
return;
}
PRTokeniser inp = location.GetLocation(cmapName);
try {
List <PdfObject> list = new List <PdfObject>();
PdfContentParser cp = new PdfContentParser(inp);
int maxExc = 50;
while (true)
{
try {
cp.Parse(list);
}
catch {
if (--maxExc < 0)
{
break;
}
continue;
}
if (list.Count == 0)
{
break;
}
String last = list[list.Count - 1].ToString();
if (level == 0 && list.Count == 3 && last.Equals(DEF))
{
PdfObject key = list[0];
if (PdfName.REGISTRY.Equals(key))
{
cmap.Registry = list[1].ToString();
}
else if (PdfName.ORDERING.Equals(key))
{
cmap.Ordering = list[1].ToString();
}
else if (CMAPNAME.Equals(key))
{
cmap.Name = list[1].ToString();
}
else if (PdfName.SUPPLEMENT.Equals(key))
{
try {
cmap.Supplement = ((PdfNumber)list[1]).IntValue;
}
catch {}
}
}
else if ((last.Equals(ENDCIDCHAR) || last.Equals(ENDBFCHAR)) && list.Count >= 3)
{
int lmax = list.Count - 2;
for (int k = 0; k < lmax; k += 2)
{
if (list[k] is PdfString)
{
cmap.AddChar((PdfString)list[k], list[k + 1]);
}
}
}
else if ((last.Equals(ENDCIDRANGE) || last.Equals(ENDBFRANGE)) && list.Count >= 4)
{
int lmax = list.Count - 3;
for (int k = 0; k < lmax; k += 3)
{
if (list[k] is PdfString && list[k + 1] is PdfString)
{
cmap.AddRange((PdfString)list[k], (PdfString)list[k + 1], list[k + 2]);
}
}
}
else if (last.Equals(USECMAP) && list.Count == 2 && list[0] is PdfName)
{
ParseCid(PdfName.DecodeName(list[0].ToString()), cmap, location, level + 1);
}
}
}
finally {
inp.Close();
}
}
public void ExtractTextTest1()
{
PDFManager pdfManager = new PDFManager(); // TODO: Initialize to an appropriate value
//byte[] input = File.ReadAllBytes(DiscoveryManager.GetDiscoveryPath("M:\\DFD", "http://unicode.org/charts/PDF/U0590.pdf", ".pdf"));
byte[] input = File.ReadAllBytes(@"");
string path = @"M:\COL\hebrew.pdf";
string destinationFileName = @"M:\COL\hebrew1.pdf";
PdfReader reader = new PdfReader(path);
int n = reader.NumberOfPages;
Document document = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(destinationFileName, FileMode.Create));
int i = 0;
document.Open();
PdfContentByte cb = writer.DirectContent;
PdfTemplate template = cb.CreateTemplate(0, 0);
while (i < n)
{
document.NewPage();
i++;
PdfImportedPage importedPage = writer.GetImportedPage(reader, i);
Image img = Image.GetInstance(importedPage);
img.ScalePercent(100);
document.Add(img);
cb.AddTemplate(importedPage, 0, 100);
}
document.Close();
writer.Close();
PdfReader pdfReader = new PdfReader(input);
StringBuilder stringBuilder = new StringBuilder();
string dingle = string.Empty;
for (int page = 1; page <= pdfReader.NumberOfPages; page++)
{
stringBuilder.Append(pdfManager.ExtractText(pdfReader.GetPageContent(page)) + " ");
PRTokeniser prTokeniser = new PRTokeniser(pdfReader.GetPageContent(page));
PdfDictionary pdfDictionary = pdfReader.GetPageN(page);
byte[] dinas = pdfReader.GetPageContent(page);
string winsdgf = Encoding.GetEncoding(1255).GetString(dinas);
try
{
while (prTokeniser.NextToken())
{
if (prTokeniser.TokenType == PRTokeniser.TokType.STRING)
{
dingle += prTokeniser.StringValue;
try
{
//dingle += (char)(int.Parse(prTokeniser.StringValue));
//dingle += iTextSharp.text.Utilities.ConvertFromUtf32(prTokeniser.FilePointer);
//dingle += ((char)prTokeniser.Read()).ToString();
dingle += prTokeniser.ReadString(2);
Chunk chunk = new Chunk(prTokeniser.StringValue);
//string wangle = PRTokeniser.GetHex(prTokeniser.IntValue).ToString();
}
catch (Exception)
{
}
}
}
}
catch (Exception)
{
{
}
//throw;
}
//int ij = 0;
// #
//If Not IsNothing(pageBytes) Then
//#
// token = New PRTokeniser(pageBytes)
//#
// While token.NextToken()
//#
// tknType = token.TokenType()
//#
// tknValue = token.StringValue
//#
// If tknType = PRTokeniser.TK_STRING Then
//#
// sb.Append(token.StringValue)
//#
// 'I need to add these additional tests to properly add whitespace to the output string
//#
// ElseIf tknType = 1 AndAlso tknValue = "-600" Then
//#
// sb.Append(" ")
//#
// ElseIf tknType = 10 AndAlso tknValue = "TJ" Then
//#
// sb.Append(" ")
//#
// End If
//#
// End While
}
string actual = pdfManager.ExtractText(input);
}
/// <summary>
/// Parses a stream object and removes OCGs. </summary>
/// <param name="stream"> a stream object </param>
/// <param name="resources"> the resources dictionary of that object (containing info about the OCGs) </param>
public virtual void Parse(PRStream stream, PdfDictionary resources)
{
baos = new MemoryStream();
properties = resources.GetAsDict(PdfName.PROPERTIES);
xobj = new HashSet2 <PdfName>();
PdfDictionary xobjects = resources.GetAsDict(PdfName.XOBJECT);
if (xobjects != null)
{
// remove XObject (form or image) that belong to an OCG that needs to be removed
foreach (PdfName name in xobjects.Keys)
{
PRStream xobject = (PRStream)xobjects.GetAsStream(name);
PdfDictionary oc = xobject.GetAsDict(PdfName.OC);
if (oc != null)
{
PdfString ocname = oc.GetAsString(PdfName.NAME);
if (ocname != null && ocgs.Contains(ocname.ToString()))
{
xobj.Add(name);
}
}
}
foreach (PdfName name in xobj)
{
xobjects.Remove(name);
}
}
// parse the content stream
byte[] contentBytes = PdfReader.GetStreamBytes(stream);
PRTokeniser tokeniser = new PRTokeniser(new RandomAccessFileOrArray(contentBytes));
PdfContentParser ps = new PdfContentParser(tokeniser);
List <PdfObject> operands = new List <PdfObject>();
while (ps.Parse(operands).Count > 0)
{
PdfLiteral @operator = (PdfLiteral)operands[operands.Count - 1];
ProcessOperator(this, @operator, operands);
if ("BI".Equals(@operator.ToString()))
{
int found = 0;
int ch;
bool immediateAfterBI = true;
while ((ch = tokeniser.Read()) != -1)
{
if (!immediateAfterBI || !PRTokeniser.IsWhitespace(ch))
{
baos.WriteByte((byte)ch);
}
immediateAfterBI = false;
if (found == 0 && PRTokeniser.IsWhitespace(ch))
{
found++;
}
else if (found == 1 && ch == 'E')
{
found++;
}
else if (found == 1 && PRTokeniser.IsWhitespace(ch))
{
// this clause is needed if we have a white space character that is part of the image data
// followed by a whitespace character that precedes the EI operator. In this case, we need
// to flush the first whitespace, then treat the current whitespace as the first potential
// character for the end of stream check. Note that we don't increment 'found' here.
}
else if (found == 2 && ch == 'I')
{
found++;
}
else if (found == 3 && PRTokeniser.IsWhitespace(ch))
{
break;
}
else
{
found = 0;
}
}
}
}
baos.Flush();
baos.Close();
stream.SetData(baos.GetBuffer());
}
/**
* Processes PDF syntax.
* <b>Note:</b> If you re-use a given {@link PdfContentStreamProcessor}, you must call {@link PdfContentStreamProcessor#reset()}
* @param contentBytes the bytes of a content stream
* @param resources the resources that come with the content stream
*/
public void ProcessContent(byte[] contentBytes, PdfDictionary resources){
this.resources.Push(resources);
PRTokeniser tokeniser = new PRTokeniser(new RandomAccessFileOrArray(new RandomAccessSourceFactory().CreateSource(contentBytes)));
PdfContentParser ps = new PdfContentParser(tokeniser);
List<PdfObject> operands = new List<PdfObject>();
while (ps.Parse(operands).Count > 0){
PdfLiteral oper = (PdfLiteral)operands[operands.Count-1];
if ("BI".Equals(oper.ToString())){
// we don't call invokeOperator for embedded images - this is one area of the PDF spec that is particularly nasty and inconsistent
PdfDictionary colorSpaceDic = resources != null ? resources.GetAsDict(PdfName.COLORSPACE) : null;
HandleInlineImage(InlineImageUtils.ParseInlineImage(ps, colorSpaceDic), colorSpaceDic);
} else {
InvokeOperator(oper, operands);
}
}
this.resources.Pop();
}
private static List <Line> FindRectangles(string sourceFile, int pageNumber)
{
//Source file to read from
var listOfLines = new List <Line>();
//Bind a reader to our PDF
using (PdfReader reader = new PdfReader(sourceFile))
{
//Create our buffer for previous token values. For Java users, List<string> is a generic list, probably most similar to an ArrayList
List <string> buf = new List <string>();
//Get the raw bytes for the page
byte[] pageBytes = reader.GetPageContent(pageNumber);
//Get the raw tokens from the bytes
PRTokeniser tokeniser = new PRTokeniser(new RandomAccessFileOrArray(pageBytes));
//Create some variables to set later
PRTokeniser.TokType tokenType;
string tokenValue;
int countOfLines = 0;
var AllowDecimalPoint = System.Globalization.NumberStyles.AllowDecimalPoint;
//Loop through each token
while (tokeniser.NextToken())
{
//Get the types and value
tokenType = tokeniser.TokenType;
tokenValue = tokeniser.StringValue;
//If the type is a numeric type
if (tokenType == PRTokeniser.TokType.NUMBER)
{
//Store it in our buffer for later user
buf.Add(tokenValue);
//Otherwise we only care about raw commands which are categorized as "OTHER"
}
else if (tokenType == PRTokeniser.TokType.OTHER)
{
//Look for a rectangle token
//if (tokenValue == "re")
if (tokenValue == "l")
{
//Sanity check, make sure we have enough items in the buffer
if (buf.Count < 2)
{
throw new Exception("Not enough elements in buffer for a rectangle");
}
countOfLines += 1;
//Read and convert the values
float x2 = float.Parse(buf[buf.Count - 2], AllowDecimalPoint);
float y2 = float.Parse(buf[buf.Count - 1], AllowDecimalPoint);
float x1 = float.Parse(buf[buf.Count - 4], AllowDecimalPoint);
float y1 = float.Parse(buf[buf.Count - 3], AllowDecimalPoint);
//Console.WriteLine($"{countOfLines} : ({x1}, {y1}) - ({x2}, {y2})");
listOfLines.Add(new Line()
{
BeginX = x1, BeginY = y1, EndX = x2, EndY = y2
});
//..do something with them here
}
}
}
}
listOfLines.Sort();
//foreach (Line line in listOfLines)
//{
// countOfLines += 1;
// Console.WriteLine($"{countOfLines}: {line}");
//}
return(listOfLines);
}
/**
* Parses the content of a page, replacing appearances of annotations
* with Form XObjects.
* @param page a page dictionary
* @throws IOException
*/
public void Parse(PdfDictionary page, PdfIndirectReference pageref)
{
LOGGER.Info("Parsing page with reference " + pageref);
// initializing member variables
baos = new MemoryStream();
this.page = page;
this.pageref = pageref;
structParents = page.GetAsNumber(PdfName.STRUCTPARENTS);
if (structParents == null)
{
throw new DocumentException(MessageLocalization.GetComposedMessage("can.t.read.document.structure"));
}
annots = page.GetAsArray(PdfName.ANNOTS);
if (annots == null)
{
annots = new PdfArray();
}
PdfDictionary resources = page.GetAsDict(PdfName.RESOURCES);
xobjects = resources.GetAsDict(PdfName.XOBJECT);
if (xobjects == null)
{
xobjects = new PdfDictionary();
resources.Put(PdfName.XOBJECT, xobjects);
}
// parsing the content stream of the page
PRStream stream = (PRStream)page.GetAsStream(PdfName.CONTENTS);
byte[] contentBytes = PdfReader.GetStreamBytes(stream);
PRTokeniser tokeniser = new PRTokeniser(new RandomAccessFileOrArray(RASFACTORY.CreateSource(contentBytes)));
PdfContentParser ps = new PdfContentParser(tokeniser);
List <PdfObject> operands = new List <PdfObject>();
while (ps.Parse(operands).Count > 0)
{
PdfLiteral opr = (PdfLiteral)operands[operands.Count - 1];
ProcessOperator(opr, operands);
}
// dealing with orphans
while (items.Count > 0 && items[0].GetPageref() == pageref.Number)
{
StructureItem item = items[0];
if (item is StructureObject)
{
ConvertToXObject((StructureObject)item);
items.RemoveAt(0);
}
}
if (annots.Length == 0)
{
page.Remove(PdfName.ANNOTS);
}
else
{
PdfDictionary annot;
for (int i = 0; i < annots.Size; i++)
{
annot = annots.GetAsDict(i);
if (annot.GetAsNumber(PdfName.STRUCTPARENT) == null)
{
throw new DocumentException(MessageLocalization.GetComposedMessage("could.not.flatten.file.untagged.annotations.found"));
}
}
}
// replacing the content stream
baos.Flush();
baos.Close();
stream.SetData(baos.ToArray());
// showing how many items are left
LOGGER.Info(String.Format("There are {0} items left for processing", items.Count));
}
/**
* Parses the content of a page, replacing appearances of annotations
* with Form XObjects.
* @param page a page dictionary
* @throws IOException
*/
virtual public void Parse(PdfDictionary page, PdfIndirectReference pageref) {
LOGGER.Info("Parsing page with reference " + pageref);
// initializing member variables
baos = new MemoryStream();
this.page = page;
this.pageref = pageref;
structParents = page.GetAsNumber(PdfName.STRUCTPARENTS);
if(structParents == null)
throw new DocumentException(MessageLocalization.GetComposedMessage("can.t.read.document.structure"));
annots = page.GetAsArray(PdfName.ANNOTS);
if(annots == null)
annots = new PdfArray();
PdfDictionary resources = page.GetAsDict(PdfName.RESOURCES);
xobjects = resources.GetAsDict(PdfName.XOBJECT);
if (xobjects == null) {
xobjects = new PdfDictionary();
resources.Put(PdfName.XOBJECT, xobjects);
}
// parsing the content stream of the page
PRStream stream = (PRStream) page.GetAsStream(PdfName.CONTENTS);
byte[] contentBytes = PdfReader.GetStreamBytes(stream);
PRTokeniser tokeniser = new PRTokeniser(new RandomAccessFileOrArray(RASFACTORY.CreateSource(contentBytes)));
PdfContentParser ps = new PdfContentParser(tokeniser);
List<PdfObject> operands = new List<PdfObject>();
while (ps.Parse(operands).Count > 0) {
PdfLiteral opr = (PdfLiteral) operands[operands.Count - 1];
ProcessOperator(opr, operands);
}
// dealing with orphans
while (items.Count > 0 && items[0].GetPageref() == pageref.Number) {
StructureItem item = items[0];
if (item is StructureObject) {
ConvertToXObject((StructureObject) item);
items.RemoveAt(0);
}
}
if(annots.Length == 0) {
page.Remove(PdfName.ANNOTS);
}
else {
PdfDictionary annot;
for(int i = 0; i < annots.Size; i++) {
annot = annots.GetAsDict(i);
if(annot.GetAsNumber(PdfName.STRUCTPARENT) == null)
throw new DocumentException(MessageLocalization.GetComposedMessage("could.not.flatten.file.untagged.annotations.found"));
}
}
// replacing the content stream
baos.Flush();
baos.Close();
stream.SetData(baos.ToArray());
// showing how many items are left
LOGGER.Info(String.Format("There are {0} items left for processing", items.Count));
}