public static PageCollection ReadPdfFileAndRefreshContent(string fileName) { PageCollection pages = ContentExtractor.Read(fileName); foreach (Page page in pages) { page.DetermineTableStructures(); page.DetermineParagraphs(); page.FillContent(); } return(pages); }
public static PageCollection Read(string filePath) { var pdfReader = new PdfReader(filePath); var pages = new PageCollection(); pages.Errors = new List <string>(); pages.PdfReader = pdfReader; for (int i = 0; i < pdfReader.NumberOfPages; i++) { if (ShowParserInfo) { Console.WriteLine("Page {0} === ({1}, {2}, {3}, {4}) rotated of {5} ======================================================", i + 1, pdfReader.GetPageSize(i + 1).Top, pdfReader.GetPageSize(i + 1).Left, pdfReader.GetPageSize(i + 1).Bottom, pdfReader.GetPageSize(i + 1).Right, pdfReader.GetPageRotation(i + 1)); } var page = new Page(); page.Index = pages.Count; MultiLineStatement currentMultilineStatement = null; GraphicState graphicState = new GraphicState(); graphicState.TransformMatrix = Matrix.Identity; graphicState.Color = Color.White; Stack <GraphicState> graphicStateStack = new Stack <GraphicState>(); Point currentPoint = new Point(0, 0); page.Rotation = pdfReader.GetPageRotation(i + 1); string rawPdfContent = Encoding.UTF8.GetString(Encoding.Convert(Encoding.Default, Encoding.UTF8, pdfReader.GetPageContent(i + 1))); 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.Trim() == "BT") { currentMultilineStatement = new TextObjectStatement(pdfReader, i + 1, graphicState.TransformMatrix); page.Statements.Add(currentMultilineStatement); } else if (statement.Trim() == "ET") { if (!(currentMultilineStatement is TextObjectStatement)) { pages.Errors.Add("ET outside a text object"); } else { ((TextObjectStatement)currentMultilineStatement).CloseMultiLineStatement(); currentMultilineStatement = null; } } else if (currentMultilineStatement != null) { currentMultilineStatement.RawContent.Add(statement); } else if (statement == "q") { graphicStateStack.Push(graphicState.Clone()); } else if (statement == "Q") { graphicState = graphicStateStack.Pop(); } else if (statement.EndsWith(" cm")) { Matrix newTransformMatrix; if (!Matrix.TryParse(statement, out newTransformMatrix)) { newTransformMatrix = Matrix.Identity; } graphicState.TransformMatrix *= newTransformMatrix; } else if (statement.EndsWith(" J")) { page.Statements.Add(new LineCapStyleStatement(statement)); } else if (statement.EndsWith(" j")) { page.Statements.Add(new LineJoinStyleStatement(statement)); } else if (statement.EndsWith(" rg")) { graphicState.Color = new NonStrokingColorStatement(statement).Color; } else if (statement.EndsWith(" RG")) { graphicState.Color = new StrokingColorStatement(statement).Color; } else if (statement.EndsWith(" G")) { graphicState.Color = new GreyColorStatement(statement).Color; } else if (statement.EndsWith(" g")) { graphicState.Color = new GreyColorStatement(statement).Color; } else if (statement.EndsWith(" m")) { currentPoint = graphicState.TransformMatrix.TransformPoint(new SetPointStatement(statement).Point).Rotate(page.Rotation); } else if (statement.EndsWith(" l")) { var lineToStatement = new LineToStatement(statement); var destinationPoint = graphicState.TransformMatrix.TransformPoint(lineToStatement.Point).Rotate(page.Rotation); if (currentPoint != destinationPoint) { if (!IgnoreWhiteLines || !graphicState.Color.IsWhite()) { page.AllLines.Add(new Line(currentPoint, destinationPoint)); } else { if (ShowParserInfo) { Console.WriteLine("Ignored rectangle"); } } currentPoint = destinationPoint; } } else if (statement.EndsWith(" c")) { var bezierCurveStatement = new BezierCurveStatement(statement); currentPoint = graphicState.TransformMatrix.TransformPoint(bezierCurveStatement.ToPoint).Rotate(page.Rotation); } else if (statement.EndsWith(" d")) { page.Statements.Add(new SetLineDashPatternStatement(statement)); } else if (statement.EndsWith(" w")) { page.Statements.Add(new SetLineWidthStatement(statement)); } else if (statement.EndsWith(" re")) { // ReSharper disable AccessToModifiedClosure var lines = new RectangleStatement(statement) .GetLines() .Where(_ => graphicState.TransformMatrix.TransformPoint(_.StartPoint) != graphicState.TransformMatrix.TransformPoint(_.EndPoint)) .Select(_ => graphicState.TransformMatrix.TransformLine(_).Rotate(page.Rotation)) ; // ReSharper restore AccessToModifiedClosure if (!IgnoreWhiteLines || !graphicState.Color.IsWhite()) { page.AllLines.AddRange(lines); } else { if (ShowParserInfo) { Console.WriteLine("Ignored rectangle"); } } } else if (statement == "S") { page.Statements.Add(StrokePathStatement.Value); } else if (statement == "s") { page.Statements.Add(CloseStrokePathStatement.Value); } else if (statement == "f") { page.Statements.Add(FillPathStatement.Value); } else { if (ShowParserInfo) { Console.WriteLine(statement); } } statement = Statement.GetNextStatement(rawPdfContent, ref pointer); } page.DeleteWrongLines(); pages.Add(page); } return(pages); }