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);
}
public override void CloseMultiLineStatement()
{
Lines = new List <TextObjectStatementLine>();
TextObjectStatementLine actualLineSettings = new TextObjectStatementLine();
Matrix textTransformMatrix = Matrix.Identity;
Point position = new Point();
float leadingParameter = 0;
int pageRotation = PdfReader.GetPageRotation(PageNumber);
for (int index = 0; index < RawContent.Count; index++)
{
string rawContent = RawContent[index];
if (rawContent.EndsWith("Tm"))
{
Matrix matrix;
if (Matrix.TryParse(rawContent, out matrix))
{
textTransformMatrix = matrix;
}
}
else if (rawContent.EndsWith("Tf"))
{
string[] fontParameters = rawContent.Split(' ');
if (fontParameters.Length < 3)
{
// Try to retrieve from previous line. This is global a parsing issue
if (index < 1)
{
continue;
}
fontParameters = (RawContent[index - 1].Trim() + " " + rawContent.Trim()).Split(' ');
if (fontParameters.Length < 3)
{
continue;
}
}
float fontSize;
if (float.TryParse(fontParameters[fontParameters.Length - 2], NumberStyles.Any, NumberFormatInfo.InvariantInfo, out fontSize))
{
actualLineSettings.FontHeight = fontSize;
}
actualLineSettings.CMapToUnicode = PdfFontHelper.GetFontCMapToUnicode(PdfReader, PageNumber, fontParameters[fontParameters.Length - 3]);
actualLineSettings.EncodingDifferenceToUnicode = EncodingDifferenceToUnicode.Parse(PdfFontHelper.GetFont(PdfReader, PageNumber, fontParameters[fontParameters.Length - 3]));
}
else if (rawContent.EndsWith("Td"))
{
float tx;
float ty;
string[] parameters = rawContent.Split(' ');
if (
float.TryParse(parameters[0], NumberStyles.Any, NumberFormatInfo.InvariantInfo, out tx) &&
float.TryParse(parameters[1], NumberStyles.Any, NumberFormatInfo.InvariantInfo, out ty))
{
textTransformMatrix = new Matrix(1, 0, 0, 1, tx, ty);
}
}
else if (rawContent.EndsWith("TD"))
{
float tx;
float ty;
string[] parameters = rawContent.Split(' ');
if (
float.TryParse(parameters[0], NumberStyles.Any, NumberFormatInfo.InvariantInfo, out tx) &&
float.TryParse(parameters[1], NumberStyles.Any, NumberFormatInfo.InvariantInfo, out ty))
{
textTransformMatrix = new Matrix(1, 0, 0, 1, tx, ty) * textTransformMatrix;
leadingParameter = -ty;
}
}
else if (rawContent.EndsWith("TL"))
{
float tl;
string[] parameters = rawContent.Split(' ');
if (
float.TryParse(parameters[0], NumberStyles.Any, NumberFormatInfo.InvariantInfo, out tl))
{
leadingParameter = tl;
}
}
else if (rawContent.EndsWith("T*"))
{
textTransformMatrix = new Matrix(1, 0, 0, 1, 0, -leadingParameter) * textTransformMatrix;
}
else if (rawContent.EndsWith("TJ"))
{
string content = GetTJContent(rawContent, actualLineSettings.CMapToUnicode, actualLineSettings.EncodingDifferenceToUnicode);
if (string.IsNullOrEmpty(content))
{
continue;
}
var line = actualLineSettings.Clone();
line.FontHeight =
line.FontHeight * textTransformMatrix.a * (pageRotation == 90 || pageRotation == 270 ? BaseTransformMatrix.b : BaseTransformMatrix.a);
line.Position = BaseTransformMatrix.TransformPoint(new Point(textTransformMatrix.TransformX(position.X, position.Y + line.FontHeight), textTransformMatrix.TransformY(position.X, position.Y + line.FontHeight))).Rotate(pageRotation);
line.Content = content;
Lines.Add(line);
}
else if (rawContent.Trim().EndsWith("Tj"))
{
string escapedContent;
escapedContent = rawContent.Trim();
escapedContent = escapedContent.Remove(escapedContent.Length - 2);
string content = PdfHexStringDataType.IsStartChar(escapedContent) ? PdfHexStringDataType.GetContent(escapedContent) : PdfStringDataType.GetContentFromEscapedContent(escapedContent);
var line = actualLineSettings.Clone();
line.FontHeight =
line.FontHeight * textTransformMatrix.a * (pageRotation == 90 || pageRotation == 270 ? BaseTransformMatrix.b : BaseTransformMatrix.a);
line.Position = BaseTransformMatrix.TransformPoint(new Point(textTransformMatrix.TransformX(position.X, position.Y + line.FontHeight), textTransformMatrix.TransformY(position.X, position.Y + line.FontHeight))).Rotate(pageRotation);
line.Content = PdfFontHelper.ToUnicode(content, line.CMapToUnicode, line.EncodingDifferenceToUnicode);
Lines.Add(line);
}
}
}
