public virtual void Invoke(PdfContentStreamProcessor pdfContentStreamProcessor, PdfLiteral oper, List <PdfObject> operands)
{
String operatorStr = oper.ToString();
PdfContentByte canvas = cleanUpStrategy.Context.Canvas;
PRStream xFormStream = null;
bool disableOutput = pathConstructionOperators.Contains(operatorStr) || pathPaintingOperators.Contains(operatorStr) || clippingPathOperators.Contains(operatorStr);
GraphicsState gs = pdfContentStreamProcessor.Gs();
// key - number of a string in the TJ operator, value - number following the string; the first number without string (if it's presented) is stored under 0.
// BE AWARE: zero-length strings are ignored!!!
IDictionary <int, float> structuredTJoperands = null;
if ("Do" == operatorStr)
{
if (operands.Count == 2 && operands[0].IsName())
{
PdfDictionary xObjResources = cleanUpStrategy.Context.Resources.GetAsDict(PdfName.XOBJECT);
if (xObjResources != null)
{
PdfStream xObj = xObjResources.GetAsStream((PdfName)operands[0]);
if (xObj is PRStream && xObj.GetAsName(PdfName.SUBTYPE) != null &&
xObj.GetAsName(PdfName.SUBTYPE).CompareTo(PdfName.FORM) == 0)
{
xFormStream = (PRStream)xObj;
cleanUpStrategy.RegisterNewContext(xObj.GetAsDict(PdfName.RESOURCES), null);
}
}
}
}
originalContentOperator.Invoke(pdfContentStreamProcessor, oper, operands);
IList <PdfCleanUpContentChunk> chunks = cleanUpStrategy.Chunks;
if (xFormStream != null)
{
xFormStream.SetData(cleanUpStrategy.Context.Canvas.ToPdf(cleanUpStrategy.Context.Canvas.PdfWriter));
cleanUpStrategy.PopContext();
canvas = cleanUpStrategy.Context.Canvas;
}
if ("Do" == operatorStr)
{
if (chunks.Count > 0 && chunks[0] is PdfCleanUpContentChunk.Image)
{
PdfCleanUpContentChunk.Image chunk = (PdfCleanUpContentChunk.Image)chunks[0];
if (chunk.Visible)
{
PdfDictionary xObjResources = cleanUpStrategy.Context.Resources.GetAsDict(PdfName.XOBJECT);
PRStream imageStream = (PRStream)xObjResources.GetAsStream((PdfName)operands[0]);
UpdateImageStream(imageStream, chunk.NewImageData);
}
else
{
disableOutput = true;
}
}
}
else if (lineStyleOperators.Contains(operatorStr))
{
disableOutput = true;
}
else if (textShowingOperators.Contains(operatorStr) && !AllChunksAreVisible(cleanUpStrategy.Chunks))
{
disableOutput = true;
if ("'" == operatorStr)
{
canvas.InternalBuffer.Append(TStar);
}
else if ("\"" == operatorStr)
{
operands[0].ToPdf(canvas.PdfWriter, canvas.InternalBuffer);
canvas.InternalBuffer.Append(Tw);
operands[1].ToPdf(canvas.PdfWriter, canvas.InternalBuffer);
canvas.InternalBuffer.Append(TcTStar);
}
else if ("TJ" == operatorStr)
{
structuredTJoperands = StructureTJarray((PdfArray)operands[0]);
}
WriteTextChunks(structuredTJoperands, chunks, canvas, gs.CharacterSpacing, gs.WordSpacing,
gs.FontSize, gs.HorizontalScaling);
}
else if (pathPaintingOperators.Contains(operatorStr))
{
WritePath(operatorStr, canvas, gs.ColorSpaceStroke);
}
else if (strokeColorOperators.Contains(operatorStr))
{
// Replace current color with the new one.
cleanUpStrategy.Context.PopStrokeColor();
cleanUpStrategy.Context.PushStrokeColor(operands);
}
else if ("q" == operatorStr)
{
cleanUpStrategy.Context.PushStrokeColor(cleanUpStrategy.Context.PeekStrokeColor());
}
else if ("Q" == operatorStr)
{
cleanUpStrategy.Context.PopStrokeColor();
}
if (!disableOutput)
{
WriteOperands(canvas, operands);
}
cleanUpStrategy.ClearChunks();
}
public void Invoke(PdfContentStreamProcessor pdfContentStreamProcessor, PdfLiteral @operator, List <PdfObject> operands)
{
String operatorStr = @operator.ToString();
PdfContentByte canvas = cleanUpStrategy.Context.Canvas;
PRStream xFormStream = null;
// key - number of a string in the TJ operator, value - number following the string; the first number without string (if it's presented) is stored under 0.
// BE AWARE: zero-length strings are ignored!!!
IDictionary <int, float> structuredTJoperands = null;
if ("Do" == operatorStr)
{
if (operands.Count == 2 && operands[0].IsName())
{
PdfDictionary xObjResources = cleanUpStrategy.Context.Resources.GetAsDict(PdfName.XOBJECT);
if (xObjResources != null)
{
PdfStream xObj = xObjResources.GetAsStream((PdfName)operands[0]);
if (xObj is PRStream && xObj.GetAsName(PdfName.SUBTYPE) != null &&
xObj.GetAsName(PdfName.SUBTYPE).CompareTo(PdfName.FORM) == 0)
{
xFormStream = (PRStream)xObj;
cleanUpStrategy.RegisterNewContext(xObj.GetAsDict(PdfName.RESOURCES), null);
}
}
}
}
originalContentOperator.Invoke(pdfContentStreamProcessor, @operator, operands);
IList <PdfCleanUpContentChunk> chunks = cleanUpStrategy.Chunks;
bool disableOutput = false;
if (xFormStream != null)
{
xFormStream.SetData(cleanUpStrategy.Context.Canvas.ToPdf(cleanUpStrategy.Context.Canvas.PdfWriter));
cleanUpStrategy.PopContext();
canvas = cleanUpStrategy.Context.Canvas;
}
if ("Do" == operatorStr)
{
if (chunks.Count > 0 && chunks[0].IsImage())
{
PdfCleanUpContentChunk chunk = chunks[0];
if (chunk.IsVisible())
{
PdfDictionary xObjResources = cleanUpStrategy.Context.Resources.GetAsDict(PdfName.XOBJECT);
PRStream imageStream = (PRStream)xObjResources.GetAsStream((PdfName)operands[0]);
UpdateImage(imageStream, chunk.NewImageData);
}
else
{
disableOutput = true;
}
}
}
else if ("q" == operatorStr)
{
cleanUpStrategy.Context.SaveGraphicsState();
}
else if ("Q" == operatorStr)
{
cleanUpStrategy.Context.RestoreGraphicsState();
}
else if ("Tf" == operatorStr)
{
cleanUpStrategy.Context.FontSize = ((PdfNumber)operands[1]).FloatValue;
}
else if ("Tc" == operatorStr)
{
cleanUpStrategy.Context.CharacterSpacing = ((PdfNumber)operands[0]).FloatValue;
}
else if ("Tw" == operatorStr)
{
cleanUpStrategy.Context.WordSpacing = ((PdfNumber)operands[0]).FloatValue;
}
else if ("Tz" == operatorStr)
{
cleanUpStrategy.Context.HorizontalScaling = ((PdfNumber)operands[0]).FloatValue;
}
else if (textShowingOperators.Contains(operatorStr) && !AllChunksAreVisible(cleanUpStrategy.Chunks))
{
disableOutput = true;
if ("'" == operatorStr)
{
canvas.InternalBuffer.Append(TStar);
}
else if ("\"" == operatorStr)
{
operands[0].ToPdf(canvas.PdfWriter, canvas.InternalBuffer);
canvas.InternalBuffer.Append(Tw);
operands[1].ToPdf(canvas.PdfWriter, canvas.InternalBuffer);
canvas.InternalBuffer.Append(TcTStar);
cleanUpStrategy.Context.CharacterSpacing = ((PdfNumber)operands[1]).FloatValue;
}
else if ("TJ" == operatorStr)
{
structuredTJoperands = StructureTJarray((PdfArray)operands[0]);
}
RenderChunks(structuredTJoperands, chunks, canvas);
}
else if ("\"" == operatorStr)
{
cleanUpStrategy.Context.CharacterSpacing = ((PdfNumber)operands[1]).FloatValue;
}
if (!disableOutput)
{
int index = 0;
foreach (PdfObject o in operands)
{
ToPdf(o, canvas.PdfWriter, canvas.InternalBuffer);
canvas.InternalBuffer.Append(operands.Count > ++index ? (byte)' ' : (byte)'\n');
}
}
cleanUpStrategy.ClearChunks();
}
