private static void InternalParse(PdfArrayDataType pdfArrayDataType, string s, ref int i)
{
i++;
while (i < s.Length)
{
if (PdfStringDataType.IsStartChar(s, i))
{
string item = PdfStringDataType.GetRawData(s, ref i);
pdfArrayDataType.StringElements.Add(item);
pdfArrayDataType.Elements.Add(item);
}
if (PdfHexStringDataType.IsStartChar(s, i))
{
string item = PdfHexStringDataType.GetRawData(s, ref i);
pdfArrayDataType.StringElements.Add(item);
pdfArrayDataType.Elements.Add(item);
}
else if (PdfNumericDataType.IsStartChar(s, i))
{
string item = PdfNumericDataType.GetRawData(s, ref i);
pdfArrayDataType.StringElements.Add(item);
pdfArrayDataType.Elements.Add(float.Parse(item, NumberFormatInfo.InvariantInfo));
}
else if (PdfArrayDataType.IsStartChar(s, i))
{
string item = PdfArrayDataType.GetRawData(s, ref i);
pdfArrayDataType.StringElements.Add(item);
PdfArrayDataType innerPdfArrayDataType = new PdfArrayDataType();
InternalParse(innerPdfArrayDataType, s, ref i);
pdfArrayDataType.Elements.Add(innerPdfArrayDataType);
}
else if (s[i] == ']')
{
return;
}
else if (s[i] == ' ')
{
i++;
}
else
{
throw new ArgumentException(string.Format("{0} is not an array", s));
}
}
}
private static string GetTextFromPage(PdfReader pdfReader, int pageNumber)
{
StringBuilder sb = new StringBuilder();
Matrix transformMatrix = Matrix.Identity;
float leadingParameter = 0;
Point position;
CMapToUnicode cMapToUnicode = null;
EncodingDifferenceToUnicode encodingDifferenceToUnicode = null;
double oldY = 0;
string lineContent = null;
string rawPdfContent = Encoding.UTF8.GetString(Encoding.Convert(Encoding.Default, Encoding.UTF8, pdfReader.GetPageContent(pageNumber)));
int pointer = 0;
string statement = Statement.GetNextStatement(rawPdfContent, ref pointer);
while (statement != null)
{
// Embedded image
if (statement.EndsWith("BI"))
{
pointer = rawPdfContent.IndexOf("\nEI", pointer, StringComparison.Ordinal);
}
else if (statement.EndsWith("Tm"))
{
Matrix matrix;
if (Matrix.TryParse(statement, out matrix))
{
transformMatrix = matrix;
}
}
else if (statement.EndsWith("Tf"))
{
string[] fontParameters = statement.Split(' ');
cMapToUnicode = PdfFontHelper.GetFontCMapToUnicode(pdfReader, pageNumber, fontParameters[fontParameters.Length - 3]);
encodingDifferenceToUnicode = EncodingDifferenceToUnicode.Parse(PdfFontHelper.GetFont(pdfReader, pageNumber, fontParameters[fontParameters.Length - 3]));
}
else if (statement.EndsWith("Td"))
{
float tx;
float ty;
string[] parameters = statement.Split(' ');
if (
float.TryParse(parameters[0], NumberStyles.Any, NumberFormatInfo.InvariantInfo, out tx) &&
float.TryParse(parameters[1], NumberStyles.Any, NumberFormatInfo.InvariantInfo, out ty))
{
transformMatrix = new Matrix(1, 0, 0, 1, tx, ty);
}
}
else if (statement.EndsWith("TD"))
{
float tx;
float ty;
string[] parameters = statement.Split(' ');
if (
float.TryParse(parameters[0], NumberStyles.Any, NumberFormatInfo.InvariantInfo, out tx) &&
float.TryParse(parameters[1], NumberStyles.Any, NumberFormatInfo.InvariantInfo, out ty))
{
transformMatrix = new Matrix(1, 0, 0, 1, tx, ty) * transformMatrix;
leadingParameter = -ty;
}
}
else if (statement.EndsWith("TL"))
{
float tl;
string[] parameters = statement.Split(' ');
if (
float.TryParse(parameters[0], NumberStyles.Any, NumberFormatInfo.InvariantInfo, out tl))
{
leadingParameter = tl;
}
}
else if (statement.EndsWith("T*"))
{
transformMatrix = new Matrix(1, 0, 0, 1, 0, -leadingParameter) * transformMatrix;
}
else if (statement.EndsWith("TJ"))
{
string content = TextObjectStatement.GetTJContent(statement, cMapToUnicode, encodingDifferenceToUnicode);
if (!string.IsNullOrWhiteSpace(content))
{
content = content.Trim();
//line.Position = BaseTransformMatrix.TransformPoint(new Point(transformMatrix.TransformX(position.X, position.Y), transformMatrix.TransformY(position.X, position.Y) + line.FontHeight)).Rotate(pageRotation);
position = new Point(transformMatrix.TransformX(Point.Origin.X, Point.Origin.Y), transformMatrix.TransformY(Point.Origin.X, Point.Origin.Y));
if (oldY == position.Y)
{
if (!string.IsNullOrWhiteSpace(lineContent))
{
lineContent += " " + content;
}
else
{
lineContent = content;
}
}
else
{
if (!string.IsNullOrWhiteSpace(lineContent))
{
sb.AppendLine(lineContent);
}
lineContent = content;
oldY = position.Y;
}
}
}
else if (statement.Trim().EndsWith("Tj"))
{
string escapedContent;
escapedContent = statement.Trim();
escapedContent = escapedContent.Remove(escapedContent.Length - 2);
string content = PdfHexStringDataType.IsStartChar(escapedContent) ? PdfHexStringDataType.GetContent(escapedContent) : PdfStringDataType.GetContentFromEscapedContent(escapedContent);
content = content.Trim();
content = PdfFontHelper.ToUnicode(content, cMapToUnicode, encodingDifferenceToUnicode);
//line.Position = BaseTransformMatrix.TransformPoint(new Point(transformMatrix.TransformX(position.X, position.Y), transformMatrix.TransformY(position.X, position.Y) + line.FontHeight)).Rotate(pageRotation);
position = new Point(transformMatrix.TransformX(Point.Origin.X, Point.Origin.Y), transformMatrix.TransformY(Point.Origin.X, Point.Origin.Y));
if (Math.Abs(oldY - position.Y) < 1)
{
if (!string.IsNullOrWhiteSpace(lineContent))
{
lineContent += " " + content;
}
else
{
lineContent = content;
}
}
else
{
if (!string.IsNullOrWhiteSpace(lineContent))
{
sb.AppendLine(lineContent);
}
lineContent = content;
oldY = position.Y;
}
}
statement = Statement.GetNextStatement(rawPdfContent, ref pointer);
}
if (!string.IsNullOrWhiteSpace(lineContent))
{
sb.Append(lineContent);
}
string textFromPage = sb.ToString();
return(textFromPage);
}
